xref: /vim-8.2.3635/src/gui.c (revision 51ad4eaa)
1 /* vi:set ts=8 sts=4 sw=4 noet:
2  *
3  * VIM - Vi IMproved		by Bram Moolenaar
4  *				GUI/Motif support by Robert Webb
5  *
6  * Do ":help uganda"  in Vim to read copying and usage conditions.
7  * Do ":help credits" in Vim to see a list of people who contributed.
8  * See README.txt for an overview of the Vim source code.
9  */
10 
11 #include "vim.h"
12 
13 /* Structure containing all the GUI information */
14 gui_T gui;
15 
16 #if defined(FEAT_MBYTE) && !defined(FEAT_GUI_GTK)
17 static void set_guifontwide(char_u *font_name);
18 #endif
19 static void gui_check_pos(void);
20 static void gui_position_components(int);
21 static void gui_outstr(char_u *, int);
22 static int gui_screenchar(int off, int flags, guicolor_T fg, guicolor_T bg, int back);
23 #ifdef FEAT_GUI_GTK
24 static int gui_screenstr(int off, int len, int flags, guicolor_T fg, guicolor_T bg, int back);
25 #endif
26 static void gui_delete_lines(int row, int count);
27 static void gui_insert_lines(int row, int count);
28 static void fill_mouse_coord(char_u *p, int col, int row);
29 #if defined(FEAT_GUI_TABLINE) || defined(PROTO)
30 static int gui_has_tabline(void);
31 #endif
32 static void gui_do_scrollbar(win_T *wp, int which, int enable);
33 static colnr_T scroll_line_len(linenr_T lnum);
34 static linenr_T gui_find_longest_lnum(void);
35 static void gui_update_horiz_scrollbar(int);
36 static void gui_set_fg_color(char_u *name);
37 static void gui_set_bg_color(char_u *name);
38 static win_T *xy2win(int x, int y);
39 
40 #if defined(UNIX) && !defined(FEAT_GUI_MAC)
41 # define MAY_FORK
42 static void gui_do_fork(void);
43 
44 static int gui_read_child_pipe(int fd);
45 
46 /* Return values for gui_read_child_pipe */
47 enum {
48     GUI_CHILD_IO_ERROR,
49     GUI_CHILD_OK,
50     GUI_CHILD_FAILED
51 };
52 
53 #endif /* MAY_FORK */
54 
55 static void gui_attempt_start(void);
56 
57 static int can_update_cursor = TRUE; /* can display the cursor */
58 static int disable_flush = 0;	/* If > 0, gui_mch_flush() is disabled. */
59 
60 /*
61  * The Athena scrollbars can move the thumb to after the end of the scrollbar,
62  * this makes the thumb indicate the part of the text that is shown.  Motif
63  * can't do this.
64  */
65 #if defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_MAC)
66 # define SCROLL_PAST_END
67 #endif
68 
69 /*
70  * gui_start -- Called when user wants to start the GUI.
71  *
72  * Careful: This function can be called recursively when there is a ":gui"
73  * command in the .gvimrc file.  Only the first call should fork, not the
74  * recursive call.
75  */
76     void
77 gui_start(void)
78 {
79     char_u	*old_term;
80     static int	recursive = 0;
81 
82     old_term = vim_strsave(T_NAME);
83 
84     settmode(TMODE_COOK);		/* stop RAW mode */
85     if (full_screen)
86 	cursor_on();			/* needed for ":gui" in .vimrc */
87     full_screen = FALSE;
88 
89     ++recursive;
90 
91 #ifdef MAY_FORK
92     /*
93      * Quit the current process and continue in the child.
94      * Makes "gvim file" disconnect from the shell it was started in.
95      * Don't do this when Vim was started with "-f" or the 'f' flag is present
96      * in 'guioptions'.
97      */
98     if (gui.dofork && !vim_strchr(p_go, GO_FORG) && recursive <= 1)
99     {
100 	gui_do_fork();
101     }
102     else
103 #endif
104     {
105 #ifdef FEAT_GUI_GTK
106 	/* If there is 'f' in 'guioptions' and specify -g argument,
107 	 * gui_mch_init_check() was not called yet.  */
108 	if (gui_mch_init_check() != OK)
109 	    getout_preserve_modified(1);
110 #endif
111 	gui_attempt_start();
112     }
113 
114     if (!gui.in_use)			/* failed to start GUI */
115     {
116 	/* Back to old term settings
117 	 *
118 	 * FIXME: If we got here because a child process failed and flagged to
119 	 * the parent to resume, and X11 is enabled with FEAT_TITLE, this will
120 	 * hit an X11 I/O error and do a longjmp(), leaving recursive
121 	 * permanently set to 1. This is probably not as big a problem as it
122 	 * sounds, because gui_mch_init() in both gui_x11.c and gui_gtk_x11.c
123 	 * return "OK" unconditionally, so it would be very difficult to
124 	 * actually hit this case.
125 	 */
126 	termcapinit(old_term);
127 	settmode(TMODE_RAW);		/* restart RAW mode */
128 #ifdef FEAT_TITLE
129 	set_title_defaults();		/* set 'title' and 'icon' again */
130 #endif
131     }
132 
133     vim_free(old_term);
134 
135     /* If the GUI started successfully, trigger the GUIEnter event, otherwise
136      * the GUIFailed event. */
137     gui_mch_update();
138     apply_autocmds(gui.in_use ? EVENT_GUIENTER : EVENT_GUIFAILED,
139 						   NULL, NULL, FALSE, curbuf);
140     --recursive;
141 }
142 
143 /*
144  * Set_termname() will call gui_init() to start the GUI.
145  * Set the "starting" flag, to indicate that the GUI will start.
146  *
147  * We don't want to open the GUI shell until after we've read .gvimrc,
148  * otherwise we don't know what font we will use, and hence we don't know
149  * what size the shell should be.  So if there are errors in the .gvimrc
150  * file, they will have to go to the terminal: Set full_screen to FALSE.
151  * full_screen will be set to TRUE again by a successful termcapinit().
152  */
153     static void
154 gui_attempt_start(void)
155 {
156     static int recursive = 0;
157 
158     ++recursive;
159     gui.starting = TRUE;
160 
161 #ifdef FEAT_GUI_GTK
162     gui.event_time = GDK_CURRENT_TIME;
163 #endif
164 
165     termcapinit((char_u *)"builtin_gui");
166     gui.starting = recursive - 1;
167 
168 #if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11)
169     if (gui.in_use)
170     {
171 # ifdef FEAT_EVAL
172 	Window	x11_window;
173 	Display	*x11_display;
174 
175 	if (gui_get_x11_windis(&x11_window, &x11_display) == OK)
176 	    set_vim_var_nr(VV_WINDOWID, (long)x11_window);
177 # endif
178 
179 	/* Display error messages in a dialog now. */
180 	display_errors();
181     }
182 #endif
183     --recursive;
184 }
185 
186 #ifdef MAY_FORK
187 
188 /* for waitpid() */
189 # if defined(HAVE_SYS_WAIT_H) || defined(HAVE_UNION_WAIT)
190 #  include <sys/wait.h>
191 # endif
192 
193 /*
194  * Create a new process, by forking. In the child, start the GUI, and in
195  * the parent, exit.
196  *
197  * If something goes wrong, this will return with gui.in_use still set
198  * to FALSE, in which case the caller should continue execution without
199  * the GUI.
200  *
201  * If the child fails to start the GUI, then the child will exit and the
202  * parent will return. If the child succeeds, then the parent will exit
203  * and the child will return.
204  */
205     static void
206 gui_do_fork(void)
207 {
208     int		pipefd[2];	/* pipe between parent and child */
209     int		pipe_error;
210     int		status;
211     int		exit_status;
212     pid_t	pid = -1;
213 
214     /* Setup a pipe between the child and the parent, so that the parent
215      * knows when the child has done the setsid() call and is allowed to
216      * exit. */
217     pipe_error = (pipe(pipefd) < 0);
218     pid = fork();
219     if (pid < 0)	    /* Fork error */
220     {
221 	EMSG(_("E851: Failed to create a new process for the GUI"));
222 	return;
223     }
224     else if (pid > 0)	    /* Parent */
225     {
226 	/* Give the child some time to do the setsid(), otherwise the
227 	 * exit() may kill the child too (when starting gvim from inside a
228 	 * gvim). */
229 	if (!pipe_error)
230 	{
231 	    /* The read returns when the child closes the pipe (or when
232 	     * the child dies for some reason). */
233 	    close(pipefd[1]);
234 	    status = gui_read_child_pipe(pipefd[0]);
235 	    if (status == GUI_CHILD_FAILED)
236 	    {
237 		/* The child failed to start the GUI, so the caller must
238 		 * continue. There may be more error information written
239 		 * to stderr by the child. */
240 # ifdef __NeXT__
241 		wait4(pid, &exit_status, 0, (struct rusage *)0);
242 # else
243 		waitpid(pid, &exit_status, 0);
244 # endif
245 		EMSG(_("E852: The child process failed to start the GUI"));
246 		return;
247 	    }
248 	    else if (status == GUI_CHILD_IO_ERROR)
249 	    {
250 		pipe_error = TRUE;
251 	    }
252 	    /* else GUI_CHILD_OK: parent exit */
253 	}
254 
255 	if (pipe_error)
256 	    ui_delay(300L, TRUE);
257 
258 	/* When swapping screens we may need to go to the next line, e.g.,
259 	 * after a hit-enter prompt and using ":gui". */
260 	if (newline_on_exit)
261 	    mch_errmsg("\r\n");
262 
263 	/*
264 	 * The parent must skip the normal exit() processing, the child
265 	 * will do it.  For example, GTK messes up signals when exiting.
266 	 */
267 	_exit(0);
268     }
269     /* Child */
270 
271 #ifdef FEAT_GUI_GTK
272     /* Call gtk_init_check() here after fork(). See gui_init_check(). */
273     if (gui_mch_init_check() != OK)
274 	getout_preserve_modified(1);
275 #endif
276 
277 # if defined(HAVE_SETSID) || defined(HAVE_SETPGID)
278     /*
279      * Change our process group.  On some systems/shells a CTRL-C in the
280      * shell where Vim was started would otherwise kill gvim!
281      */
282 #  if defined(HAVE_SETSID)
283     (void)setsid();
284 #  else
285     (void)setpgid(0, 0);
286 #  endif
287 # endif
288     if (!pipe_error)
289 	close(pipefd[0]);
290 
291 # if defined(FEAT_GUI_GNOME) && defined(FEAT_SESSION)
292     /* Tell the session manager our new PID */
293     gui_mch_forked();
294 # endif
295 
296     /* Try to start the GUI */
297     gui_attempt_start();
298 
299     /* Notify the parent */
300     if (!pipe_error)
301     {
302 	if (gui.in_use)
303 	    write_eintr(pipefd[1], "ok", 3);
304 	else
305 	    write_eintr(pipefd[1], "fail", 5);
306 	close(pipefd[1]);
307     }
308 
309     /* If we failed to start the GUI, exit now. */
310     if (!gui.in_use)
311 	getout_preserve_modified(1);
312 }
313 
314 /*
315  * Read from a pipe assumed to be connected to the child process (this
316  * function is called from the parent).
317  * Return GUI_CHILD_OK if the child successfully started the GUI,
318  * GUY_CHILD_FAILED if the child failed, or GUI_CHILD_IO_ERROR if there was
319  * some other error.
320  *
321  * The file descriptor will be closed before the function returns.
322  */
323     static int
324 gui_read_child_pipe(int fd)
325 {
326     long	bytes_read;
327 #define READ_BUFFER_SIZE 10
328     char	buffer[READ_BUFFER_SIZE];
329 
330     bytes_read = read_eintr(fd, buffer, READ_BUFFER_SIZE - 1);
331 #undef READ_BUFFER_SIZE
332     close(fd);
333     if (bytes_read < 0)
334 	return GUI_CHILD_IO_ERROR;
335     buffer[bytes_read] = NUL;
336     if (strcmp(buffer, "ok") == 0)
337 	return GUI_CHILD_OK;
338     return GUI_CHILD_FAILED;
339 }
340 
341 #endif /* MAY_FORK */
342 
343 /*
344  * Call this when vim starts up, whether or not the GUI is started
345  */
346     void
347 gui_prepare(int *argc, char **argv)
348 {
349     gui.in_use = FALSE;		    /* No GUI yet (maybe later) */
350     gui.starting = FALSE;	    /* No GUI yet (maybe later) */
351     gui_mch_prepare(argc, argv);
352 }
353 
354 /*
355  * Try initializing the GUI and check if it can be started.
356  * Used from main() to check early if "vim -g" can start the GUI.
357  * Used from gui_init() to prepare for starting the GUI.
358  * Returns FAIL or OK.
359  */
360     int
361 gui_init_check(void)
362 {
363     static int result = MAYBE;
364 
365     if (result != MAYBE)
366     {
367 	if (result == FAIL)
368 	    EMSG(_("E229: Cannot start the GUI"));
369 	return result;
370     }
371 
372     gui.shell_created = FALSE;
373     gui.dying = FALSE;
374     gui.in_focus = TRUE;		/* so the guicursor setting works */
375     gui.dragged_sb = SBAR_NONE;
376     gui.dragged_wp = NULL;
377     gui.pointer_hidden = FALSE;
378     gui.col = 0;
379     gui.row = 0;
380     gui.num_cols = Columns;
381     gui.num_rows = Rows;
382 
383     gui.cursor_is_valid = FALSE;
384     gui.scroll_region_top = 0;
385     gui.scroll_region_bot = Rows - 1;
386     gui.scroll_region_left = 0;
387     gui.scroll_region_right = Columns - 1;
388     gui.highlight_mask = HL_NORMAL;
389     gui.char_width = 1;
390     gui.char_height = 1;
391     gui.char_ascent = 0;
392     gui.border_width = 0;
393 
394     gui.norm_font = NOFONT;
395 #ifndef FEAT_GUI_GTK
396     gui.bold_font = NOFONT;
397     gui.ital_font = NOFONT;
398     gui.boldital_font = NOFONT;
399 # ifdef FEAT_XFONTSET
400     gui.fontset = NOFONTSET;
401 # endif
402 #endif
403 #ifdef FEAT_MBYTE
404     gui.wide_font = NOFONT;
405 # ifndef FEAT_GUI_GTK
406     gui.wide_bold_font = NOFONT;
407     gui.wide_ital_font = NOFONT;
408     gui.wide_boldital_font = NOFONT;
409 # endif
410 #endif
411 
412 #ifdef FEAT_MENU
413 # ifndef FEAT_GUI_GTK
414 #  ifdef FONTSET_ALWAYS
415     gui.menu_fontset = NOFONTSET;
416 #  else
417     gui.menu_font = NOFONT;
418 #  endif
419 # endif
420     gui.menu_is_active = TRUE;	    /* default: include menu */
421 # ifndef FEAT_GUI_GTK
422     gui.menu_height = MENU_DEFAULT_HEIGHT;
423     gui.menu_width = 0;
424 # endif
425 #endif
426 #if defined(FEAT_TOOLBAR) && (defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA))
427     gui.toolbar_height = 0;
428 #endif
429 #if defined(FEAT_FOOTER) && defined(FEAT_GUI_MOTIF)
430     gui.footer_height = 0;
431 #endif
432 #ifdef FEAT_BEVAL_TIP
433     gui.tooltip_fontset = NOFONTSET;
434 #endif
435 
436     gui.scrollbar_width = gui.scrollbar_height = SB_DEFAULT_WIDTH;
437     gui.prev_wrap = -1;
438 
439 #ifdef ALWAYS_USE_GUI
440     result = OK;
441 #else
442 # ifdef FEAT_GUI_GTK
443     /*
444      * Note: Don't call gtk_init_check() before fork, it will be called after
445      * the fork. When calling it before fork, it make vim hang for a while.
446      * See gui_do_fork().
447      * Use a simpler check if the GUI window can probably be opened.
448      */
449     result = gui.dofork ? gui_mch_early_init_check(TRUE) : gui_mch_init_check();
450 # else
451     result = gui_mch_init_check();
452 # endif
453 #endif
454     return result;
455 }
456 
457 /*
458  * This is the call which starts the GUI.
459  */
460     void
461 gui_init(void)
462 {
463     win_T	*wp;
464     static int	recursive = 0;
465 
466     /*
467      * It's possible to use ":gui" in a .gvimrc file.  The first halve of this
468      * function will then be executed at the first call, the rest by the
469      * recursive call.  This allow the shell to be opened halfway reading a
470      * gvimrc file.
471      */
472     if (!recursive)
473     {
474 	++recursive;
475 
476 	clip_init(TRUE);
477 
478 	/* If can't initialize, don't try doing the rest */
479 	if (gui_init_check() == FAIL)
480 	{
481 	    --recursive;
482 	    clip_init(FALSE);
483 	    return;
484 	}
485 
486 	/*
487 	 * Reset 'paste'.  It's useful in the terminal, but not in the GUI.  It
488 	 * breaks the Paste toolbar button.
489 	 */
490 	set_option_value((char_u *)"paste", 0L, NULL, 0);
491 
492 	/*
493 	 * Set up system-wide default menus.
494 	 */
495 #if defined(SYS_MENU_FILE) && defined(FEAT_MENU)
496 	if (vim_strchr(p_go, GO_NOSYSMENU) == NULL)
497 	{
498 	    sys_menu = TRUE;
499 	    do_source((char_u *)SYS_MENU_FILE, FALSE, DOSO_NONE);
500 	    sys_menu = FALSE;
501 	}
502 #endif
503 
504 	/*
505 	 * Switch on the mouse by default, unless the user changed it already.
506 	 * This can then be changed in the .gvimrc.
507 	 */
508 	if (!option_was_set((char_u *)"mouse"))
509 	    set_string_option_direct((char_u *)"mouse", -1,
510 					   (char_u *)"a", OPT_FREE, SID_NONE);
511 
512 	/*
513 	 * If -U option given, use only the initializations from that file and
514 	 * nothing else.  Skip all initializations for "-U NONE" or "-u NORC".
515 	 */
516 	if (use_gvimrc != NULL)
517 	{
518 	    if (STRCMP(use_gvimrc, "NONE") != 0
519 		    && STRCMP(use_gvimrc, "NORC") != 0
520 		    && do_source(use_gvimrc, FALSE, DOSO_NONE) != OK)
521 		EMSG2(_("E230: Cannot read from \"%s\""), use_gvimrc);
522 	}
523 	else
524 	{
525 	    /*
526 	     * Get system wide defaults for gvim, only when file name defined.
527 	     */
528 #ifdef SYS_GVIMRC_FILE
529 	    do_source((char_u *)SYS_GVIMRC_FILE, FALSE, DOSO_NONE);
530 #endif
531 
532 	    /*
533 	     * Try to read GUI initialization commands from the following
534 	     * places:
535 	     * - environment variable GVIMINIT
536 	     * - the user gvimrc file (~/.gvimrc)
537 	     * - the second user gvimrc file ($VIM/.gvimrc for Dos)
538 	     * - the third user gvimrc file ($VIM/.gvimrc for Amiga)
539 	     * The first that exists is used, the rest is ignored.
540 	     */
541 	    if (process_env((char_u *)"GVIMINIT", FALSE) == FAIL
542 		 && do_source((char_u *)USR_GVIMRC_FILE, TRUE,
543 							  DOSO_GVIMRC) == FAIL
544 #ifdef USR_GVIMRC_FILE2
545 		 && do_source((char_u *)USR_GVIMRC_FILE2, TRUE,
546 							  DOSO_GVIMRC) == FAIL
547 #endif
548 #ifdef USR_GVIMRC_FILE3
549 		 && do_source((char_u *)USR_GVIMRC_FILE3, TRUE,
550 							  DOSO_GVIMRC) == FAIL
551 #endif
552 				)
553 	    {
554 #ifdef USR_GVIMRC_FILE4
555 		(void)do_source((char_u *)USR_GVIMRC_FILE4, TRUE, DOSO_GVIMRC);
556 #endif
557 	    }
558 
559 	    /*
560 	     * Read initialization commands from ".gvimrc" in current
561 	     * directory.  This is only done if the 'exrc' option is set.
562 	     * Because of security reasons we disallow shell and write
563 	     * commands now, except for unix if the file is owned by the user
564 	     * or 'secure' option has been reset in environment of global
565 	     * ".gvimrc".
566 	     * Only do this if GVIMRC_FILE is not the same as USR_GVIMRC_FILE,
567 	     * USR_GVIMRC_FILE2, USR_GVIMRC_FILE3 or SYS_GVIMRC_FILE.
568 	     */
569 	    if (p_exrc)
570 	    {
571 #ifdef UNIX
572 		{
573 		    stat_T s;
574 
575 		    /* if ".gvimrc" file is not owned by user, set 'secure'
576 		     * mode */
577 		    if (mch_stat(GVIMRC_FILE, &s) || s.st_uid != getuid())
578 			secure = p_secure;
579 		}
580 #else
581 		secure = p_secure;
582 #endif
583 
584 		if (       fullpathcmp((char_u *)USR_GVIMRC_FILE,
585 				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
586 #ifdef SYS_GVIMRC_FILE
587 			&& fullpathcmp((char_u *)SYS_GVIMRC_FILE,
588 				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
589 #endif
590 #ifdef USR_GVIMRC_FILE2
591 			&& fullpathcmp((char_u *)USR_GVIMRC_FILE2,
592 				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
593 #endif
594 #ifdef USR_GVIMRC_FILE3
595 			&& fullpathcmp((char_u *)USR_GVIMRC_FILE3,
596 				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
597 #endif
598 #ifdef USR_GVIMRC_FILE4
599 			&& fullpathcmp((char_u *)USR_GVIMRC_FILE4,
600 				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
601 #endif
602 			)
603 		    do_source((char_u *)GVIMRC_FILE, TRUE, DOSO_GVIMRC);
604 
605 		if (secure == 2)
606 		    need_wait_return = TRUE;
607 		secure = 0;
608 	    }
609 	}
610 
611 	if (need_wait_return || msg_didany)
612 	    wait_return(TRUE);
613 
614 	--recursive;
615     }
616 
617     /* If recursive call opened the shell, return here from the first call */
618     if (gui.in_use)
619 	return;
620 
621     /*
622      * Create the GUI shell.
623      */
624     gui.in_use = TRUE;		/* Must be set after menus have been set up */
625     if (gui_mch_init() == FAIL)
626 	goto error;
627 
628     /* Avoid a delay for an error message that was printed in the terminal
629      * where Vim was started. */
630     emsg_on_display = FALSE;
631     msg_scrolled = 0;
632     clear_sb_text(TRUE);
633     need_wait_return = FALSE;
634     msg_didany = FALSE;
635 
636     /*
637      * Check validity of any generic resources that may have been loaded.
638      */
639     if (gui.border_width < 0)
640 	gui.border_width = 0;
641 
642     /*
643      * Set up the fonts.  First use a font specified with "-fn" or "-font".
644      */
645     if (font_argument != NULL)
646 	set_option_value((char_u *)"gfn", 0L, (char_u *)font_argument, 0);
647     if (
648 #ifdef FEAT_XFONTSET
649 	    (*p_guifontset == NUL
650 	     || gui_init_font(p_guifontset, TRUE) == FAIL) &&
651 #endif
652 	    gui_init_font(*p_guifont == NUL ? hl_get_font_name()
653 						  : p_guifont, FALSE) == FAIL)
654     {
655 	EMSG(_("E665: Cannot start GUI, no valid font found"));
656 	goto error2;
657     }
658 #ifdef FEAT_MBYTE
659     if (gui_get_wide_font() == FAIL)
660 	EMSG(_("E231: 'guifontwide' invalid"));
661 #endif
662 
663     gui.num_cols = Columns;
664     gui.num_rows = Rows;
665     gui_reset_scroll_region();
666 
667     /* Create initial scrollbars */
668     FOR_ALL_WINDOWS(wp)
669     {
670 	gui_create_scrollbar(&wp->w_scrollbars[SBAR_LEFT], SBAR_LEFT, wp);
671 	gui_create_scrollbar(&wp->w_scrollbars[SBAR_RIGHT], SBAR_RIGHT, wp);
672     }
673     gui_create_scrollbar(&gui.bottom_sbar, SBAR_BOTTOM, NULL);
674 
675 #ifdef FEAT_MENU
676     gui_create_initial_menus(root_menu);
677 #endif
678 #ifdef FEAT_SUN_WORKSHOP
679     if (usingSunWorkShop)
680 	workshop_init();
681 #endif
682 #ifdef FEAT_SIGN_ICONS
683     sign_gui_started();
684 #endif
685 
686     /* Configure the desired menu and scrollbars */
687     gui_init_which_components(NULL);
688 
689     /* All components of the GUI have been created now */
690     gui.shell_created = TRUE;
691 
692 #ifndef FEAT_GUI_GTK
693     /* Set the shell size, adjusted for the screen size.  For GTK this only
694      * works after the shell has been opened, thus it is further down. */
695     gui_set_shellsize(TRUE, TRUE, RESIZE_BOTH);
696 #endif
697 #if defined(FEAT_GUI_MOTIF) && defined(FEAT_MENU)
698     /* Need to set the size of the menubar after all the menus have been
699      * created. */
700     gui_mch_compute_menu_height((Widget)0);
701 #endif
702 
703     /*
704      * Actually open the GUI shell.
705      */
706     if (gui_mch_open() != FAIL)
707     {
708 #ifdef FEAT_TITLE
709 	maketitle();
710 	resettitle();
711 #endif
712 	init_gui_options();
713 #ifdef FEAT_ARABIC
714 	/* Our GUI can't do bidi. */
715 	p_tbidi = FALSE;
716 #endif
717 #if defined(FEAT_GUI_GTK)
718 	/* Give GTK+ a chance to put all widget's into place. */
719 	gui_mch_update();
720 
721 # ifdef FEAT_MENU
722 	/* If there is no 'm' in 'guioptions' we need to remove the menu now.
723 	 * It was still there to make F10 work. */
724 	if (vim_strchr(p_go, GO_MENUS) == NULL)
725 	{
726 	    --gui.starting;
727 	    gui_mch_enable_menu(FALSE);
728 	    ++gui.starting;
729 	    gui_mch_update();
730 	}
731 # endif
732 
733 	/* Now make sure the shell fits on the screen. */
734 	gui_set_shellsize(TRUE, TRUE, RESIZE_BOTH);
735 #endif
736 	/* When 'lines' was set while starting up the topframe may have to be
737 	 * resized. */
738 	win_new_shellsize();
739 
740 #ifdef FEAT_BEVAL_GUI
741 	/* Always create the Balloon Evaluation area, but disable it when
742 	 * 'ballooneval' is off. */
743 	if (balloonEval != NULL)
744 	    vim_free(balloonEval);
745 	balloonEvalForTerm = FALSE;
746 # ifdef FEAT_GUI_GTK
747 	balloonEval = gui_mch_create_beval_area(gui.drawarea, NULL,
748 						     &general_beval_cb, NULL);
749 # else
750 #  if defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA)
751 	{
752 	    extern Widget	textArea;
753 	    balloonEval = gui_mch_create_beval_area(textArea, NULL,
754 						     &general_beval_cb, NULL);
755 	}
756 #  else
757 #   ifdef FEAT_GUI_W32
758 	balloonEval = gui_mch_create_beval_area(NULL, NULL,
759 						     &general_beval_cb, NULL);
760 #   endif
761 #  endif
762 # endif
763 	if (!p_beval)
764 	    gui_mch_disable_beval_area(balloonEval);
765 #endif
766 
767 #if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
768 	if (!im_xim_isvalid_imactivate())
769 	    EMSG(_("E599: Value of 'imactivatekey' is invalid"));
770 #endif
771 	/* When 'cmdheight' was set during startup it may not have taken
772 	 * effect yet. */
773 	if (p_ch != 1L)
774 	    command_height();
775 
776 	return;
777     }
778 
779 error2:
780 #ifdef FEAT_GUI_X11
781     /* undo gui_mch_init() */
782     gui_mch_uninit();
783 #endif
784 
785 error:
786     gui.in_use = FALSE;
787     clip_init(FALSE);
788 }
789 
790 
791     void
792 gui_exit(int rc)
793 {
794     /* don't free the fonts, it leads to a BUS error
795      * [email protected] Jul 99 */
796     free_highlight_fonts();
797     gui.in_use = FALSE;
798     gui_mch_exit(rc);
799 }
800 
801 #if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11) || defined(FEAT_GUI_MSWIN) \
802 	|| defined(FEAT_GUI_PHOTON) || defined(FEAT_GUI_MAC) || defined(PROTO)
803 # define NEED_GUI_UPDATE_SCREEN 1
804 /*
805  * Called when the GUI shell is closed by the user.  If there are no changed
806  * files Vim exits, otherwise there will be a dialog to ask the user what to
807  * do.
808  * When this function returns, Vim should NOT exit!
809  */
810     void
811 gui_shell_closed(void)
812 {
813     cmdmod_T	    save_cmdmod;
814 
815     save_cmdmod = cmdmod;
816 
817     /* Only exit when there are no changed files */
818     exiting = TRUE;
819 # ifdef FEAT_BROWSE
820     cmdmod.browse = TRUE;
821 # endif
822 # if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
823     cmdmod.confirm = TRUE;
824 # endif
825     /* If there are changed buffers, present the user with a dialog if
826      * possible, otherwise give an error message. */
827     if (!check_changed_any(FALSE, FALSE))
828 	getout(0);
829 
830     exiting = FALSE;
831     cmdmod = save_cmdmod;
832     gui_update_screen();	/* redraw, window may show changed buffer */
833 }
834 #endif
835 
836 /*
837  * Set the font.  "font_list" is a comma separated list of font names.  The
838  * first font name that works is used.  If none is found, use the default
839  * font.
840  * If "fontset" is TRUE, the "font_list" is used as one name for the fontset.
841  * Return OK when able to set the font.  When it failed FAIL is returned and
842  * the fonts are unchanged.
843  */
844     int
845 gui_init_font(char_u *font_list, int fontset UNUSED)
846 {
847 #define FONTLEN 320
848     char_u	font_name[FONTLEN];
849     int		font_list_empty = FALSE;
850     int		ret = FAIL;
851 
852     if (!gui.in_use)
853 	return FAIL;
854 
855     font_name[0] = NUL;
856     if (*font_list == NUL)
857 	font_list_empty = TRUE;
858     else
859     {
860 #ifdef FEAT_XFONTSET
861 	/* When using a fontset, the whole list of fonts is one name. */
862 	if (fontset)
863 	    ret = gui_mch_init_font(font_list, TRUE);
864 	else
865 #endif
866 	    while (*font_list != NUL)
867 	    {
868 		/* Isolate one comma separated font name. */
869 		(void)copy_option_part(&font_list, font_name, FONTLEN, ",");
870 
871 		/* Careful!!!  The Win32 version of gui_mch_init_font(), when
872 		 * called with "*" will change p_guifont to the selected font
873 		 * name, which frees the old value.  This makes font_list
874 		 * invalid.  Thus when OK is returned here, font_list must no
875 		 * longer be used! */
876 		if (gui_mch_init_font(font_name, FALSE) == OK)
877 		{
878 #if defined(FEAT_MBYTE) && !defined(FEAT_GUI_GTK)
879 		    /* If it's a Unicode font, try setting 'guifontwide' to a
880 		     * similar double-width font. */
881 		    if ((p_guifontwide == NULL || *p_guifontwide == NUL)
882 				&& strstr((char *)font_name, "10646") != NULL)
883 			set_guifontwide(font_name);
884 #endif
885 		    ret = OK;
886 		    break;
887 		}
888 	    }
889     }
890 
891     if (ret != OK
892 	    && STRCMP(font_list, "*") != 0
893 	    && (font_list_empty || gui.norm_font == NOFONT))
894     {
895 	/*
896 	 * Couldn't load any font in 'font_list', keep the current font if
897 	 * there is one.  If 'font_list' is empty, or if there is no current
898 	 * font, tell gui_mch_init_font() to try to find a font we can load.
899 	 */
900 	ret = gui_mch_init_font(NULL, FALSE);
901     }
902 
903     if (ret == OK)
904     {
905 #ifndef FEAT_GUI_GTK
906 	/* Set normal font as current font */
907 # ifdef FEAT_XFONTSET
908 	if (gui.fontset != NOFONTSET)
909 	    gui_mch_set_fontset(gui.fontset);
910 	else
911 # endif
912 	    gui_mch_set_font(gui.norm_font);
913 #endif
914 	gui_set_shellsize(TRUE, TRUE, RESIZE_BOTH);
915     }
916 
917     return ret;
918 }
919 
920 #if defined(FEAT_MBYTE) || defined(PROTO)
921 # ifndef FEAT_GUI_GTK
922 /*
923  * Try setting 'guifontwide' to a font twice as wide as "name".
924  */
925     static void
926 set_guifontwide(char_u *name)
927 {
928     int		i = 0;
929     char_u	wide_name[FONTLEN + 10]; /* room for 2 * width and '*' */
930     char_u	*wp = NULL;
931     char_u	*p;
932     GuiFont	font;
933 
934     wp = wide_name;
935     for (p = name; *p != NUL; ++p)
936     {
937 	*wp++ = *p;
938 	if (*p == '-')
939 	{
940 	    ++i;
941 	    if (i == 6)		/* font type: change "--" to "-*-" */
942 	    {
943 		if (p[1] == '-')
944 		    *wp++ = '*';
945 	    }
946 	    else if (i == 12)	/* found the width */
947 	    {
948 		++p;
949 		i = getdigits(&p);
950 		if (i != 0)
951 		{
952 		    /* Double the width specification. */
953 		    sprintf((char *)wp, "%d%s", i * 2, p);
954 		    font = gui_mch_get_font(wide_name, FALSE);
955 		    if (font != NOFONT)
956 		    {
957 			gui_mch_free_font(gui.wide_font);
958 			gui.wide_font = font;
959 			set_string_option_direct((char_u *)"gfw", -1,
960 						      wide_name, OPT_FREE, 0);
961 		    }
962 		}
963 		break;
964 	    }
965 	}
966     }
967 }
968 # endif /* !FEAT_GUI_GTK */
969 
970 /*
971  * Get the font for 'guifontwide'.
972  * Return FAIL for an invalid font name.
973  */
974     int
975 gui_get_wide_font(void)
976 {
977     GuiFont	font = NOFONT;
978     char_u	font_name[FONTLEN];
979     char_u	*p;
980 
981     if (!gui.in_use)	    /* Can't allocate font yet, assume it's OK. */
982 	return OK;	    /* Will give an error message later. */
983 
984     if (p_guifontwide != NULL && *p_guifontwide != NUL)
985     {
986 	for (p = p_guifontwide; *p != NUL; )
987 	{
988 	    /* Isolate one comma separated font name. */
989 	    (void)copy_option_part(&p, font_name, FONTLEN, ",");
990 	    font = gui_mch_get_font(font_name, FALSE);
991 	    if (font != NOFONT)
992 		break;
993 	}
994 	if (font == NOFONT)
995 	    return FAIL;
996     }
997 
998     gui_mch_free_font(gui.wide_font);
999 # ifdef FEAT_GUI_GTK
1000     /* Avoid unnecessary overhead if 'guifontwide' is equal to 'guifont'. */
1001     if (font != NOFONT && gui.norm_font != NOFONT
1002 			 && pango_font_description_equal(font, gui.norm_font))
1003     {
1004 	gui.wide_font = NOFONT;
1005 	gui_mch_free_font(font);
1006     }
1007     else
1008 # endif
1009 	gui.wide_font = font;
1010 # ifdef FEAT_GUI_MSWIN
1011     gui_mch_wide_font_changed();
1012 # else
1013     /*
1014      * TODO: setup wide_bold_font, wide_ital_font and wide_boldital_font to
1015      * support those fonts for 'guifontwide'.
1016      */
1017 # endif
1018     return OK;
1019 }
1020 #endif
1021 
1022     void
1023 gui_set_cursor(int row, int col)
1024 {
1025     gui.row = row;
1026     gui.col = col;
1027 }
1028 
1029 /*
1030  * gui_check_pos - check if the cursor is on the screen.
1031  */
1032     static void
1033 gui_check_pos(void)
1034 {
1035     if (gui.row >= screen_Rows)
1036 	gui.row = screen_Rows - 1;
1037     if (gui.col >= screen_Columns)
1038 	gui.col = screen_Columns - 1;
1039     if (gui.cursor_row >= screen_Rows || gui.cursor_col >= screen_Columns)
1040 	gui.cursor_is_valid = FALSE;
1041 }
1042 
1043 /*
1044  * Redraw the cursor if necessary or when forced.
1045  * Careful: The contents of ScreenLines[] must match what is on the screen,
1046  * otherwise this goes wrong.  May need to call out_flush() first.
1047  */
1048     void
1049 gui_update_cursor(
1050     int		force,		/* when TRUE, update even when not moved */
1051     int		clear_selection)/* clear selection under cursor */
1052 {
1053     int		cur_width = 0;
1054     int		cur_height = 0;
1055     int		old_hl_mask;
1056     cursorentry_T *shape;
1057     int		id;
1058 #ifdef FEAT_TERMINAL
1059     guicolor_T	shape_fg = INVALCOLOR;
1060     guicolor_T	shape_bg = INVALCOLOR;
1061 #endif
1062     guicolor_T	cfg, cbg, cc;	/* cursor fore-/background color */
1063     int		cattr;		/* cursor attributes */
1064     int		attr;
1065     attrentry_T *aep = NULL;
1066 
1067     /* Don't update the cursor when halfway busy scrolling or the screen size
1068      * doesn't match 'columns' and 'lines.  ScreenLines[] isn't valid then. */
1069     if (!can_update_cursor || screen_Columns != gui.num_cols
1070 					       || screen_Rows != gui.num_rows)
1071 	return;
1072 
1073     gui_check_pos();
1074     if (!gui.cursor_is_valid || force
1075 		    || gui.row != gui.cursor_row || gui.col != gui.cursor_col)
1076     {
1077 	gui_undraw_cursor();
1078 	if (gui.row < 0)
1079 	    return;
1080 #ifdef HAVE_INPUT_METHOD
1081 	if (gui.row != gui.cursor_row || gui.col != gui.cursor_col)
1082 	    im_set_position(gui.row, gui.col);
1083 #endif
1084 	gui.cursor_row = gui.row;
1085 	gui.cursor_col = gui.col;
1086 
1087 	/* Only write to the screen after ScreenLines[] has been initialized */
1088 	if (!screen_cleared || ScreenLines == NULL)
1089 	    return;
1090 
1091 	/* Clear the selection if we are about to write over it */
1092 	if (clear_selection)
1093 	    clip_may_clear_selection(gui.row, gui.row);
1094 	/* Check that the cursor is inside the shell (resizing may have made
1095 	 * it invalid) */
1096 	if (gui.row >= screen_Rows || gui.col >= screen_Columns)
1097 	    return;
1098 
1099 	gui.cursor_is_valid = TRUE;
1100 
1101 	/*
1102 	 * How the cursor is drawn depends on the current mode.
1103 	 * When in a terminal window use the shape/color specified there.
1104 	 */
1105 #ifdef FEAT_TERMINAL
1106 	if (terminal_is_active())
1107 	    shape = term_get_cursor_shape(&shape_fg, &shape_bg);
1108 	else
1109 #endif
1110 	    shape = &shape_table[get_shape_idx(FALSE)];
1111 	if (State & LANGMAP)
1112 	    id = shape->id_lm;
1113 	else
1114 	    id = shape->id;
1115 
1116 	/* get the colors and attributes for the cursor.  Default is inverted */
1117 	cfg = INVALCOLOR;
1118 	cbg = INVALCOLOR;
1119 	cattr = HL_INVERSE;
1120 	gui_mch_set_blinking(shape->blinkwait,
1121 			     shape->blinkon,
1122 			     shape->blinkoff);
1123 	if (shape->blinkwait == 0 || shape->blinkon == 0
1124 						       || shape->blinkoff == 0)
1125 	    gui_mch_stop_blink(FALSE);
1126 #ifdef FEAT_TERMINAL
1127 	if (shape_bg != INVALCOLOR)
1128 	{
1129 	    cattr = 0;
1130 	    cfg = shape_fg;
1131 	    cbg = shape_bg;
1132 	}
1133 	else
1134 #endif
1135 	if (id > 0)
1136 	{
1137 	    cattr = syn_id2colors(id, &cfg, &cbg);
1138 #if defined(HAVE_INPUT_METHOD) || defined(FEAT_HANGULIN)
1139 	    {
1140 		static int iid;
1141 		guicolor_T fg, bg;
1142 
1143 		if (
1144 # if defined(FEAT_GUI_GTK) && defined(FEAT_XIM) && !defined(FEAT_HANGULIN)
1145 			preedit_get_status()
1146 # else
1147 			im_get_status()
1148 # endif
1149 			)
1150 		{
1151 		    iid = syn_name2id((char_u *)"CursorIM");
1152 		    if (iid > 0)
1153 		    {
1154 			syn_id2colors(iid, &fg, &bg);
1155 			if (bg != INVALCOLOR)
1156 			    cbg = bg;
1157 			if (fg != INVALCOLOR)
1158 			    cfg = fg;
1159 		    }
1160 		}
1161 	    }
1162 #endif
1163 	}
1164 
1165 	/*
1166 	 * Get the attributes for the character under the cursor.
1167 	 * When no cursor color was given, use the character color.
1168 	 */
1169 	attr = ScreenAttrs[LineOffset[gui.row] + gui.col];
1170 	if (attr > HL_ALL)
1171 	    aep = syn_gui_attr2entry(attr);
1172 	if (aep != NULL)
1173 	{
1174 	    attr = aep->ae_attr;
1175 	    if (cfg == INVALCOLOR)
1176 		cfg = ((attr & HL_INVERSE)  ? aep->ae_u.gui.bg_color
1177 					    : aep->ae_u.gui.fg_color);
1178 	    if (cbg == INVALCOLOR)
1179 		cbg = ((attr & HL_INVERSE)  ? aep->ae_u.gui.fg_color
1180 					    : aep->ae_u.gui.bg_color);
1181 	}
1182 	if (cfg == INVALCOLOR)
1183 	    cfg = (attr & HL_INVERSE) ? gui.back_pixel : gui.norm_pixel;
1184 	if (cbg == INVALCOLOR)
1185 	    cbg = (attr & HL_INVERSE) ? gui.norm_pixel : gui.back_pixel;
1186 
1187 #ifdef FEAT_XIM
1188 	if (aep != NULL)
1189 	{
1190 	    xim_bg_color = ((attr & HL_INVERSE) ? aep->ae_u.gui.fg_color
1191 						: aep->ae_u.gui.bg_color);
1192 	    xim_fg_color = ((attr & HL_INVERSE) ? aep->ae_u.gui.bg_color
1193 						: aep->ae_u.gui.fg_color);
1194 	    if (xim_bg_color == INVALCOLOR)
1195 		xim_bg_color = (attr & HL_INVERSE) ? gui.norm_pixel
1196 						   : gui.back_pixel;
1197 	    if (xim_fg_color == INVALCOLOR)
1198 		xim_fg_color = (attr & HL_INVERSE) ? gui.back_pixel
1199 						   : gui.norm_pixel;
1200 	}
1201 	else
1202 	{
1203 	    xim_bg_color = (attr & HL_INVERSE) ? gui.norm_pixel
1204 					       : gui.back_pixel;
1205 	    xim_fg_color = (attr & HL_INVERSE) ? gui.back_pixel
1206 					       : gui.norm_pixel;
1207 	}
1208 #endif
1209 
1210 	attr &= ~HL_INVERSE;
1211 	if (cattr & HL_INVERSE)
1212 	{
1213 	    cc = cbg;
1214 	    cbg = cfg;
1215 	    cfg = cc;
1216 	}
1217 	cattr &= ~HL_INVERSE;
1218 
1219 	/*
1220 	 * When we don't have window focus, draw a hollow cursor.
1221 	 */
1222 	if (!gui.in_focus)
1223 	{
1224 	    gui_mch_draw_hollow_cursor(cbg);
1225 	    return;
1226 	}
1227 
1228 	old_hl_mask = gui.highlight_mask;
1229 	if (shape->shape == SHAPE_BLOCK
1230 #ifdef FEAT_HANGULIN
1231 		|| composing_hangul
1232 #endif
1233 	   )
1234 	{
1235 	    /*
1236 	     * Draw the text character with the cursor colors.	Use the
1237 	     * character attributes plus the cursor attributes.
1238 	     */
1239 	    gui.highlight_mask = (cattr | attr);
1240 #ifdef FEAT_HANGULIN
1241 	    if (composing_hangul)
1242 	    {
1243 		char_u *comp_buf;
1244 		int comp_len;
1245 
1246 		comp_buf = hangul_composing_buffer_get(&comp_len);
1247 		if (comp_buf)
1248 		{
1249 		    (void)gui_outstr_nowrap(comp_buf, comp_len,
1250 					    GUI_MON_IS_CURSOR | GUI_MON_NOCLEAR,
1251 					    cfg, cbg, 0);
1252 		    vim_free(comp_buf);
1253 		}
1254 	    }
1255 	    else
1256 #endif
1257 		(void)gui_screenchar(LineOffset[gui.row] + gui.col,
1258 			GUI_MON_IS_CURSOR | GUI_MON_NOCLEAR, cfg, cbg, 0);
1259 	}
1260 	else
1261 	{
1262 #if defined(FEAT_MBYTE) && defined(FEAT_RIGHTLEFT)
1263 	    int	    col_off = FALSE;
1264 #endif
1265 	    /*
1266 	     * First draw the partial cursor, then overwrite with the text
1267 	     * character, using a transparent background.
1268 	     */
1269 	    if (shape->shape == SHAPE_VER)
1270 	    {
1271 		cur_height = gui.char_height;
1272 		cur_width = (gui.char_width * shape->percentage + 99) / 100;
1273 	    }
1274 	    else
1275 	    {
1276 		cur_height = (gui.char_height * shape->percentage + 99) / 100;
1277 		cur_width = gui.char_width;
1278 	    }
1279 #ifdef FEAT_MBYTE
1280 	    if (has_mbyte && (*mb_off2cells)(LineOffset[gui.row] + gui.col,
1281 				    LineOffset[gui.row] + screen_Columns) > 1)
1282 	    {
1283 		/* Double wide character. */
1284 		if (shape->shape != SHAPE_VER)
1285 		    cur_width += gui.char_width;
1286 # ifdef FEAT_RIGHTLEFT
1287 		if (CURSOR_BAR_RIGHT)
1288 		{
1289 		    /* gui.col points to the left halve of the character but
1290 		     * the vertical line needs to be on the right halve.
1291 		     * A double-wide horizontal line is also drawn from the
1292 		     * right halve in gui_mch_draw_part_cursor(). */
1293 		    col_off = TRUE;
1294 		    ++gui.col;
1295 		}
1296 # endif
1297 	    }
1298 #endif
1299 	    gui_mch_draw_part_cursor(cur_width, cur_height, cbg);
1300 #if defined(FEAT_MBYTE) && defined(FEAT_RIGHTLEFT)
1301 	    if (col_off)
1302 		--gui.col;
1303 #endif
1304 
1305 #ifndef FEAT_GUI_MSWIN	    /* doesn't seem to work for MSWindows */
1306 	    gui.highlight_mask = ScreenAttrs[LineOffset[gui.row] + gui.col];
1307 	    (void)gui_screenchar(LineOffset[gui.row] + gui.col,
1308 		    GUI_MON_TRS_CURSOR | GUI_MON_NOCLEAR,
1309 		    (guicolor_T)0, (guicolor_T)0, 0);
1310 #endif
1311 	}
1312 	gui.highlight_mask = old_hl_mask;
1313     }
1314 }
1315 
1316 #if defined(FEAT_MENU) || defined(PROTO)
1317     void
1318 gui_position_menu(void)
1319 {
1320 # if !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_MOTIF)
1321     if (gui.menu_is_active && gui.in_use)
1322 	gui_mch_set_menu_pos(0, 0, gui.menu_width, gui.menu_height);
1323 # endif
1324 }
1325 #endif
1326 
1327 /*
1328  * Position the various GUI components (text area, menu).  The vertical
1329  * scrollbars are NOT handled here.  See gui_update_scrollbars().
1330  */
1331     static void
1332 gui_position_components(int total_width UNUSED)
1333 {
1334     int	    text_area_x;
1335     int	    text_area_y;
1336     int	    text_area_width;
1337     int	    text_area_height;
1338 
1339     /* avoid that moving components around generates events */
1340     ++hold_gui_events;
1341 
1342     text_area_x = 0;
1343     if (gui.which_scrollbars[SBAR_LEFT])
1344 	text_area_x += gui.scrollbar_width;
1345 
1346     text_area_y = 0;
1347 #if defined(FEAT_MENU) && !(defined(FEAT_GUI_GTK) || defined(FEAT_GUI_PHOTON))
1348     gui.menu_width = total_width;
1349     if (gui.menu_is_active)
1350 	text_area_y += gui.menu_height;
1351 #endif
1352 #if defined(FEAT_TOOLBAR) && defined(FEAT_GUI_MSWIN)
1353     if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
1354 	text_area_y = TOOLBAR_BUTTON_HEIGHT + TOOLBAR_BORDER_HEIGHT;
1355 #endif
1356 
1357 # if defined(FEAT_GUI_TABLINE) && (defined(FEAT_GUI_MSWIN) \
1358 	|| defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_MAC))
1359     if (gui_has_tabline())
1360 	text_area_y += gui.tabline_height;
1361 #endif
1362 
1363 #if defined(FEAT_TOOLBAR) && (defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA))
1364     if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
1365     {
1366 # ifdef FEAT_GUI_ATHENA
1367 	gui_mch_set_toolbar_pos(0, text_area_y,
1368 				gui.menu_width, gui.toolbar_height);
1369 # endif
1370 	text_area_y += gui.toolbar_height;
1371     }
1372 #endif
1373 
1374     text_area_width = gui.num_cols * gui.char_width + gui.border_offset * 2;
1375     text_area_height = gui.num_rows * gui.char_height + gui.border_offset * 2;
1376 
1377     gui_mch_set_text_area_pos(text_area_x,
1378 			      text_area_y,
1379 			      text_area_width,
1380 			      text_area_height
1381 #if defined(FEAT_XIM) && !defined(FEAT_GUI_GTK)
1382 				  + xim_get_status_area_height()
1383 #endif
1384 			      );
1385 #ifdef FEAT_MENU
1386     gui_position_menu();
1387 #endif
1388     if (gui.which_scrollbars[SBAR_BOTTOM])
1389 	gui_mch_set_scrollbar_pos(&gui.bottom_sbar,
1390 				  text_area_x,
1391 				  text_area_y + text_area_height,
1392 				  text_area_width,
1393 				  gui.scrollbar_height);
1394     gui.left_sbar_x = 0;
1395     gui.right_sbar_x = text_area_x + text_area_width;
1396 
1397     --hold_gui_events;
1398 }
1399 
1400 /*
1401  * Get the width of the widgets and decorations to the side of the text area.
1402  */
1403     int
1404 gui_get_base_width(void)
1405 {
1406     int	    base_width;
1407 
1408     base_width = 2 * gui.border_offset;
1409     if (gui.which_scrollbars[SBAR_LEFT])
1410 	base_width += gui.scrollbar_width;
1411     if (gui.which_scrollbars[SBAR_RIGHT])
1412 	base_width += gui.scrollbar_width;
1413     return base_width;
1414 }
1415 
1416 /*
1417  * Get the height of the widgets and decorations above and below the text area.
1418  */
1419     int
1420 gui_get_base_height(void)
1421 {
1422     int	    base_height;
1423 
1424     base_height = 2 * gui.border_offset;
1425     if (gui.which_scrollbars[SBAR_BOTTOM])
1426 	base_height += gui.scrollbar_height;
1427 #ifdef FEAT_GUI_GTK
1428     /* We can't take the sizes properly into account until anything is
1429      * realized.  Therefore we recalculate all the values here just before
1430      * setting the size. (--mdcki) */
1431 #else
1432 # ifdef FEAT_MENU
1433     if (gui.menu_is_active)
1434 	base_height += gui.menu_height;
1435 # endif
1436 # ifdef FEAT_TOOLBAR
1437     if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
1438 #  if defined(FEAT_GUI_MSWIN) && defined(FEAT_TOOLBAR)
1439 	base_height += (TOOLBAR_BUTTON_HEIGHT + TOOLBAR_BORDER_HEIGHT);
1440 #  else
1441 	base_height += gui.toolbar_height;
1442 #  endif
1443 # endif
1444 # if defined(FEAT_GUI_TABLINE) && (defined(FEAT_GUI_MSWIN) \
1445 	|| defined(FEAT_GUI_MOTIF))
1446     if (gui_has_tabline())
1447 	base_height += gui.tabline_height;
1448 # endif
1449 # ifdef FEAT_FOOTER
1450     if (vim_strchr(p_go, GO_FOOTER) != NULL)
1451 	base_height += gui.footer_height;
1452 # endif
1453 # if defined(FEAT_GUI_MOTIF) && defined(FEAT_MENU)
1454     base_height += gui_mch_text_area_extra_height();
1455 # endif
1456 #endif
1457     return base_height;
1458 }
1459 
1460 /*
1461  * Should be called after the GUI shell has been resized.  Its arguments are
1462  * the new width and height of the shell in pixels.
1463  */
1464     void
1465 gui_resize_shell(int pixel_width, int pixel_height)
1466 {
1467     static int	busy = FALSE;
1468 
1469     if (!gui.shell_created)	    /* ignore when still initializing */
1470 	return;
1471 
1472     /*
1473      * Can't resize the screen while it is being redrawn.  Remember the new
1474      * size and handle it later.
1475      */
1476     if (updating_screen || busy)
1477     {
1478 	new_pixel_width = pixel_width;
1479 	new_pixel_height = pixel_height;
1480 	return;
1481     }
1482 
1483 again:
1484     new_pixel_width = 0;
1485     new_pixel_height = 0;
1486     busy = TRUE;
1487 
1488     /* Flush pending output before redrawing */
1489     out_flush();
1490 
1491     gui.num_cols = (pixel_width - gui_get_base_width()) / gui.char_width;
1492     gui.num_rows = (pixel_height - gui_get_base_height()) / gui.char_height;
1493 
1494     gui_position_components(pixel_width);
1495     gui_reset_scroll_region();
1496 
1497     /*
1498      * At the "more" and ":confirm" prompt there is no redraw, put the cursor
1499      * at the last line here (why does it have to be one row too low?).
1500      */
1501     if (State == ASKMORE || State == CONFIRM)
1502 	gui.row = gui.num_rows;
1503 
1504     /* Only comparing Rows and Columns may be sufficient, but let's stay on
1505      * the safe side. */
1506     if (gui.num_rows != screen_Rows || gui.num_cols != screen_Columns
1507 	    || gui.num_rows != Rows || gui.num_cols != Columns)
1508 	shell_resized();
1509 
1510     gui_update_scrollbars(TRUE);
1511     gui_update_cursor(FALSE, TRUE);
1512 #if defined(FEAT_XIM) && !defined(FEAT_GUI_GTK)
1513     xim_set_status_area();
1514 #endif
1515 
1516     busy = FALSE;
1517 
1518     /* We may have been called again while redrawing the screen.
1519      * Need to do it all again with the latest size then.  But only if the size
1520      * actually changed. */
1521     if (new_pixel_height)
1522     {
1523 	if (pixel_width == new_pixel_width && pixel_height == new_pixel_height)
1524 	{
1525 	    new_pixel_width = 0;
1526 	    new_pixel_height = 0;
1527 	}
1528 	else
1529 	{
1530 	    pixel_width = new_pixel_width;
1531 	    pixel_height = new_pixel_height;
1532 	    goto again;
1533 	}
1534     }
1535 }
1536 
1537 /*
1538  * Check if gui_resize_shell() must be called.
1539  */
1540     void
1541 gui_may_resize_shell(void)
1542 {
1543     if (new_pixel_height)
1544 	/* careful: gui_resize_shell() may postpone the resize again if we
1545 	 * were called indirectly by it */
1546 	gui_resize_shell(new_pixel_width, new_pixel_height);
1547 }
1548 
1549     int
1550 gui_get_shellsize(void)
1551 {
1552     Rows = gui.num_rows;
1553     Columns = gui.num_cols;
1554     return OK;
1555 }
1556 
1557 /*
1558  * Set the size of the Vim shell according to Rows and Columns.
1559  * If "fit_to_display" is TRUE then the size may be reduced to fit the window
1560  * on the screen.
1561  * When "mustset" is TRUE the size was set by the user. When FALSE a UI
1562  * component was added or removed (e.g., a scrollbar).
1563  */
1564     void
1565 gui_set_shellsize(
1566     int		mustset UNUSED,
1567     int		fit_to_display,
1568     int		direction)		/* RESIZE_HOR, RESIZE_VER */
1569 {
1570     int		base_width;
1571     int		base_height;
1572     int		width;
1573     int		height;
1574     int		min_width;
1575     int		min_height;
1576     int		screen_w;
1577     int		screen_h;
1578 #ifdef FEAT_GUI_GTK
1579     int		un_maximize = mustset;
1580     int		did_adjust = 0;
1581 #endif
1582     int		x = -1, y = -1;
1583 
1584     if (!gui.shell_created)
1585 	return;
1586 
1587 #if defined(MSWIN) || defined(FEAT_GUI_GTK)
1588     /* If not setting to a user specified size and maximized, calculate the
1589      * number of characters that fit in the maximized window. */
1590     if (!mustset && (vim_strchr(p_go, GO_KEEPWINSIZE) != NULL
1591 						       || gui_mch_maximized()))
1592     {
1593 	gui_mch_newfont();
1594 	return;
1595     }
1596 #endif
1597 
1598     base_width = gui_get_base_width();
1599     base_height = gui_get_base_height();
1600     if (fit_to_display)
1601 	/* Remember the original window position. */
1602 	(void)gui_mch_get_winpos(&x, &y);
1603 
1604 #ifdef USE_SUN_WORKSHOP
1605     if (!mustset && usingSunWorkShop
1606 				&& workshop_get_width_height(&width, &height))
1607     {
1608 	Columns = (width - base_width + gui.char_width - 1) / gui.char_width;
1609 	Rows = (height - base_height + gui.char_height - 1) / gui.char_height;
1610     }
1611     else
1612 #endif
1613     {
1614 	width = Columns * gui.char_width + base_width;
1615 	height = Rows * gui.char_height + base_height;
1616     }
1617 
1618     if (fit_to_display)
1619     {
1620 	gui_mch_get_screen_dimensions(&screen_w, &screen_h);
1621 	if ((direction & RESIZE_HOR) && width > screen_w)
1622 	{
1623 	    Columns = (screen_w - base_width) / gui.char_width;
1624 	    if (Columns < MIN_COLUMNS)
1625 		Columns = MIN_COLUMNS;
1626 	    width = Columns * gui.char_width + base_width;
1627 #ifdef FEAT_GUI_GTK
1628 	    ++did_adjust;
1629 #endif
1630 	}
1631 	if ((direction & RESIZE_VERT) && height > screen_h)
1632 	{
1633 	    Rows = (screen_h - base_height) / gui.char_height;
1634 	    check_shellsize();
1635 	    height = Rows * gui.char_height + base_height;
1636 #ifdef FEAT_GUI_GTK
1637 	    ++did_adjust;
1638 #endif
1639 	}
1640 #ifdef FEAT_GUI_GTK
1641 	if (did_adjust == 2 || (width + gui.char_width >= screen_w
1642 				     && height + gui.char_height >= screen_h))
1643 	    /* don't unmaximize if at maximum size */
1644 	    un_maximize = FALSE;
1645 #endif
1646     }
1647     limit_screen_size();
1648     gui.num_cols = Columns;
1649     gui.num_rows = Rows;
1650 
1651     min_width = base_width + MIN_COLUMNS * gui.char_width;
1652     min_height = base_height + MIN_LINES * gui.char_height;
1653     min_height += tabline_height() * gui.char_height;
1654 
1655 #ifdef FEAT_GUI_GTK
1656     if (un_maximize)
1657     {
1658 	/* If the window size is smaller than the screen unmaximize the
1659 	 * window, otherwise resizing won't work. */
1660 	gui_mch_get_screen_dimensions(&screen_w, &screen_h);
1661 	if ((width + gui.char_width < screen_w
1662 				   || height + gui.char_height * 2 < screen_h)
1663 		&& gui_mch_maximized())
1664 	    gui_mch_unmaximize();
1665     }
1666 #endif
1667 
1668     gui_mch_set_shellsize(width, height, min_width, min_height,
1669 					  base_width, base_height, direction);
1670 
1671     if (fit_to_display && x >= 0 && y >= 0)
1672     {
1673 	/* Some window managers put the Vim window left of/above the screen.
1674 	 * Only change the position if it wasn't already negative before
1675 	 * (happens on MS-Windows with a secondary monitor). */
1676 	gui_mch_update();
1677 	if (gui_mch_get_winpos(&x, &y) == OK && (x < 0 || y < 0))
1678 	    gui_mch_set_winpos(x < 0 ? 0 : x, y < 0 ? 0 : y);
1679     }
1680 
1681     gui_position_components(width);
1682     gui_update_scrollbars(TRUE);
1683     gui_reset_scroll_region();
1684 }
1685 
1686 /*
1687  * Called when Rows and/or Columns has changed.
1688  */
1689     void
1690 gui_new_shellsize(void)
1691 {
1692     gui_reset_scroll_region();
1693 }
1694 
1695 /*
1696  * Make scroll region cover whole screen.
1697  */
1698     void
1699 gui_reset_scroll_region(void)
1700 {
1701     gui.scroll_region_top = 0;
1702     gui.scroll_region_bot = gui.num_rows - 1;
1703     gui.scroll_region_left = 0;
1704     gui.scroll_region_right = gui.num_cols - 1;
1705 }
1706 
1707     void
1708 gui_start_highlight(int mask)
1709 {
1710     if (mask > HL_ALL)		    /* highlight code */
1711 	gui.highlight_mask = mask;
1712     else			    /* mask */
1713 	gui.highlight_mask |= mask;
1714 }
1715 
1716     void
1717 gui_stop_highlight(int mask)
1718 {
1719     if (mask > HL_ALL)		    /* highlight code */
1720 	gui.highlight_mask = HL_NORMAL;
1721     else			    /* mask */
1722 	gui.highlight_mask &= ~mask;
1723 }
1724 
1725 /*
1726  * Clear a rectangular region of the screen from text pos (row1, col1) to
1727  * (row2, col2) inclusive.
1728  */
1729     void
1730 gui_clear_block(
1731     int	    row1,
1732     int	    col1,
1733     int	    row2,
1734     int	    col2)
1735 {
1736     /* Clear the selection if we are about to write over it */
1737     clip_may_clear_selection(row1, row2);
1738 
1739     gui_mch_clear_block(row1, col1, row2, col2);
1740 
1741     /* Invalidate cursor if it was in this block */
1742     if (       gui.cursor_row >= row1 && gui.cursor_row <= row2
1743 	    && gui.cursor_col >= col1 && gui.cursor_col <= col2)
1744 	gui.cursor_is_valid = FALSE;
1745 }
1746 
1747 /*
1748  * Write code to update the cursor later.  This avoids the need to flush the
1749  * output buffer before calling gui_update_cursor().
1750  */
1751     void
1752 gui_update_cursor_later(void)
1753 {
1754     OUT_STR(IF_EB("\033|s", ESC_STR "|s"));
1755 }
1756 
1757     void
1758 gui_write(
1759     char_u	*s,
1760     int		len)
1761 {
1762     char_u	*p;
1763     int		arg1 = 0, arg2 = 0;
1764     int		force_cursor = FALSE;	/* force cursor update */
1765     int		force_scrollbar = FALSE;
1766     static win_T	*old_curwin = NULL;
1767 
1768 /* #define DEBUG_GUI_WRITE */
1769 #ifdef DEBUG_GUI_WRITE
1770     {
1771 	int i;
1772 	char_u *str;
1773 
1774 	printf("gui_write(%d):\n    ", len);
1775 	for (i = 0; i < len; i++)
1776 	    if (s[i] == ESC)
1777 	    {
1778 		if (i != 0)
1779 		    printf("\n    ");
1780 		printf("<ESC>");
1781 	    }
1782 	    else
1783 	    {
1784 		str = transchar_byte(s[i]);
1785 		if (str[0] && str[1])
1786 		    printf("<%s>", (char *)str);
1787 		else
1788 		    printf("%s", (char *)str);
1789 	    }
1790 	printf("\n");
1791     }
1792 #endif
1793     while (len)
1794     {
1795 	if (s[0] == ESC && s[1] == '|')
1796 	{
1797 	    p = s + 2;
1798 	    if (VIM_ISDIGIT(*p) || (*p == '-' && VIM_ISDIGIT(*(p + 1))))
1799 	    {
1800 		arg1 = getdigits(&p);
1801 		if (p > s + len)
1802 		    break;
1803 		if (*p == ';')
1804 		{
1805 		    ++p;
1806 		    arg2 = getdigits(&p);
1807 		    if (p > s + len)
1808 			break;
1809 		}
1810 	    }
1811 	    switch (*p)
1812 	    {
1813 		case 'C':	/* Clear screen */
1814 		    clip_scroll_selection(9999);
1815 		    gui_mch_clear_all();
1816 		    gui.cursor_is_valid = FALSE;
1817 		    force_scrollbar = TRUE;
1818 		    break;
1819 		case 'M':	/* Move cursor */
1820 		    gui_set_cursor(arg1, arg2);
1821 		    break;
1822 		case 's':	/* force cursor (shape) update */
1823 		    force_cursor = TRUE;
1824 		    break;
1825 		case 'R':	/* Set scroll region */
1826 		    if (arg1 < arg2)
1827 		    {
1828 			gui.scroll_region_top = arg1;
1829 			gui.scroll_region_bot = arg2;
1830 		    }
1831 		    else
1832 		    {
1833 			gui.scroll_region_top = arg2;
1834 			gui.scroll_region_bot = arg1;
1835 		    }
1836 		    break;
1837 		case 'V':	/* Set vertical scroll region */
1838 		    if (arg1 < arg2)
1839 		    {
1840 			gui.scroll_region_left = arg1;
1841 			gui.scroll_region_right = arg2;
1842 		    }
1843 		    else
1844 		    {
1845 			gui.scroll_region_left = arg2;
1846 			gui.scroll_region_right = arg1;
1847 		    }
1848 		    break;
1849 		case 'd':	/* Delete line */
1850 		    gui_delete_lines(gui.row, 1);
1851 		    break;
1852 		case 'D':	/* Delete lines */
1853 		    gui_delete_lines(gui.row, arg1);
1854 		    break;
1855 		case 'i':	/* Insert line */
1856 		    gui_insert_lines(gui.row, 1);
1857 		    break;
1858 		case 'I':	/* Insert lines */
1859 		    gui_insert_lines(gui.row, arg1);
1860 		    break;
1861 		case '$':	/* Clear to end-of-line */
1862 		    gui_clear_block(gui.row, gui.col, gui.row,
1863 							    (int)Columns - 1);
1864 		    break;
1865 		case 'h':	/* Turn on highlighting */
1866 		    gui_start_highlight(arg1);
1867 		    break;
1868 		case 'H':	/* Turn off highlighting */
1869 		    gui_stop_highlight(arg1);
1870 		    break;
1871 		case 'f':	/* flash the window (visual bell) */
1872 		    gui_mch_flash(arg1 == 0 ? 20 : arg1);
1873 		    break;
1874 		default:
1875 		    p = s + 1;	/* Skip the ESC */
1876 		    break;
1877 	    }
1878 	    len -= (int)(++p - s);
1879 	    s = p;
1880 	}
1881 	else if (
1882 #ifdef EBCDIC
1883 		CtrlChar(s[0]) != 0	/* Ctrl character */
1884 #else
1885 		s[0] < 0x20		/* Ctrl character */
1886 #endif
1887 #ifdef FEAT_SIGN_ICONS
1888 		&& s[0] != SIGN_BYTE
1889 # ifdef FEAT_NETBEANS_INTG
1890 		&& s[0] != MULTISIGN_BYTE
1891 # endif
1892 #endif
1893 		)
1894 	{
1895 	    if (s[0] == '\n')		/* NL */
1896 	    {
1897 		gui.col = 0;
1898 		if (gui.row < gui.scroll_region_bot)
1899 		    gui.row++;
1900 		else
1901 		    gui_delete_lines(gui.scroll_region_top, 1);
1902 	    }
1903 	    else if (s[0] == '\r')	/* CR */
1904 	    {
1905 		gui.col = 0;
1906 	    }
1907 	    else if (s[0] == '\b')	/* Backspace */
1908 	    {
1909 		if (gui.col)
1910 		    --gui.col;
1911 	    }
1912 	    else if (s[0] == Ctrl_L)	/* cursor-right */
1913 	    {
1914 		++gui.col;
1915 	    }
1916 	    else if (s[0] == Ctrl_G)	/* Beep */
1917 	    {
1918 		gui_mch_beep();
1919 	    }
1920 	    /* Other Ctrl character: shouldn't happen! */
1921 
1922 	    --len;	/* Skip this char */
1923 	    ++s;
1924 	}
1925 	else
1926 	{
1927 	    p = s;
1928 	    while (len > 0 && (
1929 #ifdef EBCDIC
1930 			CtrlChar(*p) == 0
1931 #else
1932 			*p >= 0x20
1933 #endif
1934 #ifdef FEAT_SIGN_ICONS
1935 			|| *p == SIGN_BYTE
1936 # ifdef FEAT_NETBEANS_INTG
1937 			|| *p == MULTISIGN_BYTE
1938 # endif
1939 #endif
1940 			))
1941 	    {
1942 		len--;
1943 		p++;
1944 	    }
1945 	    gui_outstr(s, (int)(p - s));
1946 	    s = p;
1947 	}
1948     }
1949 
1950     /* Postponed update of the cursor (won't work if "can_update_cursor" isn't
1951      * set). */
1952     if (force_cursor)
1953 	gui_update_cursor(TRUE, TRUE);
1954 
1955     /* When switching to another window the dragging must have stopped.
1956      * Required for GTK, dragged_sb isn't reset. */
1957     if (old_curwin != curwin)
1958 	gui.dragged_sb = SBAR_NONE;
1959 
1960     /* Update the scrollbars after clearing the screen or when switched
1961      * to another window.
1962      * Update the horizontal scrollbar always, it's difficult to check all
1963      * situations where it might change. */
1964     if (force_scrollbar || old_curwin != curwin)
1965 	gui_update_scrollbars(force_scrollbar);
1966     else
1967 	gui_update_horiz_scrollbar(FALSE);
1968     old_curwin = curwin;
1969 
1970     /*
1971      * We need to make sure this is cleared since Athena doesn't tell us when
1972      * he is done dragging.  Do the same for GTK.
1973      */
1974 #if defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_GTK)
1975     gui.dragged_sb = SBAR_NONE;
1976 #endif
1977 
1978     gui_may_flush();		    /* In case vim decides to take a nap */
1979 }
1980 
1981 /*
1982  * When ScreenLines[] is invalid, updating the cursor should not be done, it
1983  * produces wrong results.  Call gui_dont_update_cursor() before that code and
1984  * gui_can_update_cursor() afterwards.
1985  */
1986     void
1987 gui_dont_update_cursor(int undraw)
1988 {
1989     if (gui.in_use)
1990     {
1991 	/* Undraw the cursor now, we probably can't do it after the change. */
1992 	if (undraw)
1993 	    gui_undraw_cursor();
1994 	can_update_cursor = FALSE;
1995     }
1996 }
1997 
1998     void
1999 gui_can_update_cursor(void)
2000 {
2001     can_update_cursor = TRUE;
2002     /* No need to update the cursor right now, there is always more output
2003      * after scrolling. */
2004 }
2005 
2006 /*
2007  * Disable issuing gui_mch_flush().
2008  */
2009     void
2010 gui_disable_flush(void)
2011 {
2012     ++disable_flush;
2013 }
2014 
2015 /*
2016  * Enable issuing gui_mch_flush().
2017  */
2018     void
2019 gui_enable_flush(void)
2020 {
2021     --disable_flush;
2022 }
2023 
2024 /*
2025  * Issue gui_mch_flush() if it is not disabled.
2026  */
2027     void
2028 gui_may_flush(void)
2029 {
2030     if (disable_flush == 0)
2031 	gui_mch_flush();
2032 }
2033 
2034     static void
2035 gui_outstr(char_u *s, int len)
2036 {
2037     int	    this_len;
2038 #ifdef FEAT_MBYTE
2039     int	    cells;
2040 #endif
2041 
2042     if (len == 0)
2043 	return;
2044 
2045     if (len < 0)
2046 	len = (int)STRLEN(s);
2047 
2048     while (len > 0)
2049     {
2050 #ifdef FEAT_MBYTE
2051 	if (has_mbyte)
2052 	{
2053 	    /* Find out how many chars fit in the current line. */
2054 	    cells = 0;
2055 	    for (this_len = 0; this_len < len; )
2056 	    {
2057 		cells += (*mb_ptr2cells)(s + this_len);
2058 		if (gui.col + cells > Columns)
2059 		    break;
2060 		this_len += (*mb_ptr2len)(s + this_len);
2061 	    }
2062 	    if (this_len > len)
2063 		this_len = len;	    /* don't include following composing char */
2064 	}
2065 	else
2066 #endif
2067 	    if (gui.col + len > Columns)
2068 	    this_len = Columns - gui.col;
2069 	else
2070 	    this_len = len;
2071 
2072 	(void)gui_outstr_nowrap(s, this_len,
2073 					  0, (guicolor_T)0, (guicolor_T)0, 0);
2074 	s += this_len;
2075 	len -= this_len;
2076 #ifdef FEAT_MBYTE
2077 	/* fill up for a double-width char that doesn't fit. */
2078 	if (len > 0 && gui.col < Columns)
2079 	    (void)gui_outstr_nowrap((char_u *)" ", 1,
2080 					  0, (guicolor_T)0, (guicolor_T)0, 0);
2081 #endif
2082 	/* The cursor may wrap to the next line. */
2083 	if (gui.col >= Columns)
2084 	{
2085 	    gui.col = 0;
2086 	    gui.row++;
2087 	}
2088     }
2089 }
2090 
2091 /*
2092  * Output one character (may be one or two display cells).
2093  * Caller must check for valid "off".
2094  * Returns FAIL or OK, just like gui_outstr_nowrap().
2095  */
2096     static int
2097 gui_screenchar(
2098     int		off,	    /* Offset from start of screen */
2099     int		flags,
2100     guicolor_T	fg,	    /* colors for cursor */
2101     guicolor_T	bg,	    /* colors for cursor */
2102     int		back)	    /* backup this many chars when using bold trick */
2103 {
2104 #ifdef FEAT_MBYTE
2105     char_u	buf[MB_MAXBYTES + 1];
2106 
2107     /* Don't draw right halve of a double-width UTF-8 char. "cannot happen" */
2108     if (enc_utf8 && ScreenLines[off] == 0)
2109 	return OK;
2110 
2111     if (enc_utf8 && ScreenLinesUC[off] != 0)
2112 	/* Draw UTF-8 multi-byte character. */
2113 	return gui_outstr_nowrap(buf, utfc_char2bytes(off, buf),
2114 							 flags, fg, bg, back);
2115 
2116     if (enc_dbcs == DBCS_JPNU && ScreenLines[off] == 0x8e)
2117     {
2118 	buf[0] = ScreenLines[off];
2119 	buf[1] = ScreenLines2[off];
2120 	return gui_outstr_nowrap(buf, 2, flags, fg, bg, back);
2121     }
2122 
2123     /* Draw non-multi-byte character or DBCS character. */
2124     return gui_outstr_nowrap(ScreenLines + off,
2125 	    enc_dbcs ? (*mb_ptr2len)(ScreenLines + off) : 1,
2126 							 flags, fg, bg, back);
2127 #else
2128     return gui_outstr_nowrap(ScreenLines + off, 1, flags, fg, bg, back);
2129 #endif
2130 }
2131 
2132 #ifdef FEAT_GUI_GTK
2133 /*
2134  * Output the string at the given screen position.  This is used in place
2135  * of gui_screenchar() where possible because Pango needs as much context
2136  * as possible to work nicely.  It's a lot faster as well.
2137  */
2138     static int
2139 gui_screenstr(
2140     int		off,	    /* Offset from start of screen */
2141     int		len,	    /* string length in screen cells */
2142     int		flags,
2143     guicolor_T	fg,	    /* colors for cursor */
2144     guicolor_T	bg,	    /* colors for cursor */
2145     int		back)	    /* backup this many chars when using bold trick */
2146 {
2147     char_u  *buf;
2148     int	    outlen = 0;
2149     int	    i;
2150     int	    retval;
2151 
2152     if (len <= 0) /* "cannot happen"? */
2153 	return OK;
2154 
2155     if (enc_utf8)
2156     {
2157 	buf = alloc((unsigned)(len * MB_MAXBYTES + 1));
2158 	if (buf == NULL)
2159 	    return OK; /* not much we could do here... */
2160 
2161 	for (i = off; i < off + len; ++i)
2162 	{
2163 	    if (ScreenLines[i] == 0)
2164 		continue; /* skip second half of double-width char */
2165 
2166 	    if (ScreenLinesUC[i] == 0)
2167 		buf[outlen++] = ScreenLines[i];
2168 	    else
2169 		outlen += utfc_char2bytes(i, buf + outlen);
2170 	}
2171 
2172 	buf[outlen] = NUL; /* only to aid debugging */
2173 	retval = gui_outstr_nowrap(buf, outlen, flags, fg, bg, back);
2174 	vim_free(buf);
2175 
2176 	return retval;
2177     }
2178     else if (enc_dbcs == DBCS_JPNU)
2179     {
2180 	buf = alloc((unsigned)(len * 2 + 1));
2181 	if (buf == NULL)
2182 	    return OK; /* not much we could do here... */
2183 
2184 	for (i = off; i < off + len; ++i)
2185 	{
2186 	    buf[outlen++] = ScreenLines[i];
2187 
2188 	    /* handle double-byte single-width char */
2189 	    if (ScreenLines[i] == 0x8e)
2190 		buf[outlen++] = ScreenLines2[i];
2191 	    else if (MB_BYTE2LEN(ScreenLines[i]) == 2)
2192 		buf[outlen++] = ScreenLines[++i];
2193 	}
2194 
2195 	buf[outlen] = NUL; /* only to aid debugging */
2196 	retval = gui_outstr_nowrap(buf, outlen, flags, fg, bg, back);
2197 	vim_free(buf);
2198 
2199 	return retval;
2200     }
2201     else
2202     {
2203 	return gui_outstr_nowrap(&ScreenLines[off], len,
2204 				 flags, fg, bg, back);
2205     }
2206 }
2207 #endif /* FEAT_GUI_GTK */
2208 
2209 /*
2210  * Output the given string at the current cursor position.  If the string is
2211  * too long to fit on the line, then it is truncated.
2212  * "flags":
2213  * GUI_MON_IS_CURSOR should only be used when this function is being called to
2214  * actually draw (an inverted) cursor.
2215  * GUI_MON_TRS_CURSOR is used to draw the cursor text with a transparent
2216  * background.
2217  * GUI_MON_NOCLEAR is used to avoid clearing the selection when drawing over
2218  * it.
2219  * Returns OK, unless "back" is non-zero and using the bold trick, then return
2220  * FAIL (the caller should start drawing "back" chars back).
2221  */
2222     int
2223 gui_outstr_nowrap(
2224     char_u	*s,
2225     int		len,
2226     int		flags,
2227     guicolor_T	fg,	    /* colors for cursor */
2228     guicolor_T	bg,	    /* colors for cursor */
2229     int		back)	    /* backup this many chars when using bold trick */
2230 {
2231     long_u	highlight_mask;
2232     long_u	hl_mask_todo;
2233     guicolor_T	fg_color;
2234     guicolor_T	bg_color;
2235     guicolor_T	sp_color;
2236 #if !defined(FEAT_GUI_GTK)
2237     GuiFont	font = NOFONT;
2238 # ifdef FEAT_MBYTE
2239     GuiFont	wide_font = NOFONT;
2240 # endif
2241 # ifdef FEAT_XFONTSET
2242     GuiFontset	fontset = NOFONTSET;
2243 # endif
2244 #endif
2245     attrentry_T	*aep = NULL;
2246     int		draw_flags;
2247     int		col = gui.col;
2248 #ifdef FEAT_SIGN_ICONS
2249     int		draw_sign = FALSE;
2250 # ifdef FEAT_NETBEANS_INTG
2251     int		multi_sign = FALSE;
2252 # endif
2253 #endif
2254 
2255     if (len < 0)
2256 	len = (int)STRLEN(s);
2257     if (len == 0)
2258 	return OK;
2259 
2260 #ifdef FEAT_SIGN_ICONS
2261     if (*s == SIGN_BYTE
2262 # ifdef FEAT_NETBEANS_INTG
2263 	  || *s == MULTISIGN_BYTE
2264 # endif
2265     )
2266     {
2267 # ifdef FEAT_NETBEANS_INTG
2268 	if (*s == MULTISIGN_BYTE)
2269 	    multi_sign = TRUE;
2270 # endif
2271 	/* draw spaces instead */
2272 	s = (char_u *)"  ";
2273 	if (len == 1 && col > 0)
2274 	    --col;
2275 	len = 2;
2276 	draw_sign = TRUE;
2277 	highlight_mask = 0;
2278     }
2279     else
2280 #endif
2281     if (gui.highlight_mask > HL_ALL)
2282     {
2283 	aep = syn_gui_attr2entry(gui.highlight_mask);
2284 	if (aep == NULL)	    /* highlighting not set */
2285 	    highlight_mask = 0;
2286 	else
2287 	    highlight_mask = aep->ae_attr;
2288     }
2289     else
2290 	highlight_mask = gui.highlight_mask;
2291     hl_mask_todo = highlight_mask;
2292 
2293 #if !defined(FEAT_GUI_GTK)
2294     /* Set the font */
2295     if (aep != NULL && aep->ae_u.gui.font != NOFONT)
2296 	font = aep->ae_u.gui.font;
2297 # ifdef FEAT_XFONTSET
2298     else if (aep != NULL && aep->ae_u.gui.fontset != NOFONTSET)
2299 	fontset = aep->ae_u.gui.fontset;
2300 # endif
2301     else
2302     {
2303 # ifdef FEAT_XFONTSET
2304 	if (gui.fontset != NOFONTSET)
2305 	    fontset = gui.fontset;
2306 	else
2307 # endif
2308 	    if (hl_mask_todo & (HL_BOLD | HL_STANDOUT))
2309 	{
2310 	    if ((hl_mask_todo & HL_ITALIC) && gui.boldital_font != NOFONT)
2311 	    {
2312 		font = gui.boldital_font;
2313 		hl_mask_todo &= ~(HL_BOLD | HL_STANDOUT | HL_ITALIC);
2314 	    }
2315 	    else if (gui.bold_font != NOFONT)
2316 	    {
2317 		font = gui.bold_font;
2318 		hl_mask_todo &= ~(HL_BOLD | HL_STANDOUT);
2319 	    }
2320 	    else
2321 		font = gui.norm_font;
2322 	}
2323 	else if ((hl_mask_todo & HL_ITALIC) && gui.ital_font != NOFONT)
2324 	{
2325 	    font = gui.ital_font;
2326 	    hl_mask_todo &= ~HL_ITALIC;
2327 	}
2328 	else
2329 	    font = gui.norm_font;
2330 
2331 # ifdef FEAT_MBYTE
2332 	/*
2333 	 * Choose correct wide_font by font.  wide_font should be set with font
2334 	 * at same time in above block.  But it will make many "ifdef" nasty
2335 	 * blocks.  So we do it here.
2336 	 */
2337 	if (font == gui.boldital_font && gui.wide_boldital_font)
2338 	    wide_font = gui.wide_boldital_font;
2339 	else if (font == gui.bold_font && gui.wide_bold_font)
2340 	    wide_font = gui.wide_bold_font;
2341 	else if (font == gui.ital_font && gui.wide_ital_font)
2342 	    wide_font = gui.wide_ital_font;
2343 	else if (font == gui.norm_font && gui.wide_font)
2344 	    wide_font = gui.wide_font;
2345 # endif
2346 
2347     }
2348 # ifdef FEAT_XFONTSET
2349     if (fontset != NOFONTSET)
2350 	gui_mch_set_fontset(fontset);
2351     else
2352 # endif
2353 	gui_mch_set_font(font);
2354 #endif
2355 
2356     draw_flags = 0;
2357 
2358     /* Set the color */
2359     bg_color = gui.back_pixel;
2360     if ((flags & GUI_MON_IS_CURSOR) && gui.in_focus)
2361     {
2362 	draw_flags |= DRAW_CURSOR;
2363 	fg_color = fg;
2364 	bg_color = bg;
2365 	sp_color = fg;
2366     }
2367     else if (aep != NULL)
2368     {
2369 	fg_color = aep->ae_u.gui.fg_color;
2370 	if (fg_color == INVALCOLOR)
2371 	    fg_color = gui.norm_pixel;
2372 	bg_color = aep->ae_u.gui.bg_color;
2373 	if (bg_color == INVALCOLOR)
2374 	    bg_color = gui.back_pixel;
2375 	sp_color = aep->ae_u.gui.sp_color;
2376 	if (sp_color == INVALCOLOR)
2377 	    sp_color = fg_color;
2378     }
2379     else
2380     {
2381 	fg_color = gui.norm_pixel;
2382 	sp_color = fg_color;
2383     }
2384 
2385     if (highlight_mask & (HL_INVERSE | HL_STANDOUT))
2386     {
2387 #if defined(AMIGA)
2388 	gui_mch_set_colors(bg_color, fg_color);
2389 #else
2390 	gui_mch_set_fg_color(bg_color);
2391 	gui_mch_set_bg_color(fg_color);
2392 #endif
2393     }
2394     else
2395     {
2396 #if defined(AMIGA)
2397 	gui_mch_set_colors(fg_color, bg_color);
2398 #else
2399 	gui_mch_set_fg_color(fg_color);
2400 	gui_mch_set_bg_color(bg_color);
2401 #endif
2402     }
2403     gui_mch_set_sp_color(sp_color);
2404 
2405     /* Clear the selection if we are about to write over it */
2406     if (!(flags & GUI_MON_NOCLEAR))
2407 	clip_may_clear_selection(gui.row, gui.row);
2408 
2409 
2410     /* If there's no bold font, then fake it */
2411     if (hl_mask_todo & (HL_BOLD | HL_STANDOUT))
2412 	draw_flags |= DRAW_BOLD;
2413 
2414     /*
2415      * When drawing bold or italic characters the spill-over from the left
2416      * neighbor may be destroyed.  Let the caller backup to start redrawing
2417      * just after a blank.
2418      */
2419     if (back != 0 && ((draw_flags & DRAW_BOLD) || (highlight_mask & HL_ITALIC)))
2420 	return FAIL;
2421 
2422 #if defined(FEAT_GUI_GTK)
2423     /* If there's no italic font, then fake it.
2424      * For GTK2, we don't need a different font for italic style. */
2425     if (hl_mask_todo & HL_ITALIC)
2426 	draw_flags |= DRAW_ITALIC;
2427 
2428     /* Do we underline the text? */
2429     if (hl_mask_todo & HL_UNDERLINE)
2430 	draw_flags |= DRAW_UNDERL;
2431 
2432 #else
2433     /* Do we underline the text? */
2434     if ((hl_mask_todo & HL_UNDERLINE) || (hl_mask_todo & HL_ITALIC))
2435 	draw_flags |= DRAW_UNDERL;
2436 #endif
2437     /* Do we undercurl the text? */
2438     if (hl_mask_todo & HL_UNDERCURL)
2439 	draw_flags |= DRAW_UNDERC;
2440 
2441     /* Do we strikethrough the text? */
2442     if (hl_mask_todo & HL_STRIKETHROUGH)
2443 	draw_flags |= DRAW_STRIKE;
2444 
2445     /* Do we draw transparently? */
2446     if (flags & GUI_MON_TRS_CURSOR)
2447 	draw_flags |= DRAW_TRANSP;
2448 
2449     /*
2450      * Draw the text.
2451      */
2452 #ifdef FEAT_GUI_GTK
2453     /* The value returned is the length in display cells */
2454     len = gui_gtk2_draw_string(gui.row, col, s, len, draw_flags);
2455 #else
2456 # ifdef FEAT_MBYTE
2457     if (enc_utf8)
2458     {
2459 	int	start;		/* index of bytes to be drawn */
2460 	int	cells;		/* cellwidth of bytes to be drawn */
2461 	int	thislen;	/* length of bytes to be drawn */
2462 	int	cn;		/* cellwidth of current char */
2463 	int	i;		/* index of current char */
2464 	int	c;		/* current char value */
2465 	int	cl;		/* byte length of current char */
2466 	int	comping;	/* current char is composing */
2467 	int	scol = col;	/* screen column */
2468 	int	curr_wide = FALSE;  /* use 'guifontwide' */
2469 	int	prev_wide = FALSE;
2470 	int	wide_changed;
2471 #  ifdef WIN3264
2472 	int	sep_comp = FALSE;   /* Don't separate composing chars. */
2473 #  else
2474 	int	sep_comp = TRUE;    /* Separate composing chars. */
2475 #  endif
2476 
2477 	/* Break the string at a composing character, it has to be drawn on
2478 	 * top of the previous character. */
2479 	start = 0;
2480 	cells = 0;
2481 	for (i = 0; i < len; i += cl)
2482 	{
2483 	    c = utf_ptr2char(s + i);
2484 	    cn = utf_char2cells(c);
2485 	    comping = utf_iscomposing(c);
2486 	    if (!comping)	/* count cells from non-composing chars */
2487 		cells += cn;
2488 	    if (!comping || sep_comp)
2489 	    {
2490 		if (cn > 1
2491 #  ifdef FEAT_XFONTSET
2492 			&& fontset == NOFONTSET
2493 #  endif
2494 			&& wide_font != NOFONT)
2495 		    curr_wide = TRUE;
2496 		else
2497 		    curr_wide = FALSE;
2498 	    }
2499 	    cl = utf_ptr2len(s + i);
2500 	    if (cl == 0)	/* hit end of string */
2501 		len = i + cl;	/* len must be wrong "cannot happen" */
2502 
2503 	    wide_changed = curr_wide != prev_wide;
2504 
2505 	    /* Print the string so far if it's the last character or there is
2506 	     * a composing character. */
2507 	    if (i + cl >= len || (comping && sep_comp && i > start)
2508 		    || wide_changed
2509 #  if defined(FEAT_GUI_X11)
2510 		    || (cn > 1
2511 #   ifdef FEAT_XFONTSET
2512 			/* No fontset: At least draw char after wide char at
2513 			 * right position. */
2514 			&& fontset == NOFONTSET
2515 #   endif
2516 		       )
2517 #  endif
2518 	       )
2519 	    {
2520 		if ((comping && sep_comp) || wide_changed)
2521 		    thislen = i - start;
2522 		else
2523 		    thislen = i - start + cl;
2524 		if (thislen > 0)
2525 		{
2526 		    if (prev_wide)
2527 			gui_mch_set_font(wide_font);
2528 		    gui_mch_draw_string(gui.row, scol, s + start, thislen,
2529 								  draw_flags);
2530 		    if (prev_wide)
2531 			gui_mch_set_font(font);
2532 		    start += thislen;
2533 		}
2534 		scol += cells;
2535 		cells = 0;
2536 		/* Adjust to not draw a character which width is changed
2537 		 * against with last one. */
2538 		if (wide_changed && !(comping && sep_comp))
2539 		{
2540 		    scol -= cn;
2541 		    cl = 0;
2542 		}
2543 
2544 #  if defined(FEAT_GUI_X11)
2545 		/* No fontset: draw a space to fill the gap after a wide char
2546 		 * */
2547 		if (cn > 1 && (draw_flags & DRAW_TRANSP) == 0
2548 #   ifdef FEAT_XFONTSET
2549 			&& fontset == NOFONTSET
2550 #   endif
2551 			&& !wide_changed)
2552 		    gui_mch_draw_string(gui.row, scol - 1, (char_u *)" ",
2553 							       1, draw_flags);
2554 #  endif
2555 	    }
2556 	    /* Draw a composing char on top of the previous char. */
2557 	    if (comping && sep_comp)
2558 	    {
2559 #  if defined(__APPLE_CC__) && TARGET_API_MAC_CARBON
2560 		/* Carbon ATSUI autodraws composing char over previous char */
2561 		gui_mch_draw_string(gui.row, scol, s + i, cl,
2562 						    draw_flags | DRAW_TRANSP);
2563 #  else
2564 		gui_mch_draw_string(gui.row, scol - cn, s + i, cl,
2565 						    draw_flags | DRAW_TRANSP);
2566 #  endif
2567 		start = i + cl;
2568 	    }
2569 	    prev_wide = curr_wide;
2570 	}
2571 	/* The stuff below assumes "len" is the length in screen columns. */
2572 	len = scol - col;
2573     }
2574     else
2575 # endif
2576     {
2577 	gui_mch_draw_string(gui.row, col, s, len, draw_flags);
2578 # ifdef FEAT_MBYTE
2579 	if (enc_dbcs == DBCS_JPNU)
2580 	{
2581 	    /* Get the length in display cells, this can be different from the
2582 	     * number of bytes for "euc-jp". */
2583 	    len = mb_string2cells(s, len);
2584 	}
2585 # endif
2586     }
2587 #endif /* !FEAT_GUI_GTK */
2588 
2589     if (!(flags & (GUI_MON_IS_CURSOR | GUI_MON_TRS_CURSOR)))
2590 	gui.col = col + len;
2591 
2592     /* May need to invert it when it's part of the selection. */
2593     if (flags & GUI_MON_NOCLEAR)
2594 	clip_may_redraw_selection(gui.row, col, len);
2595 
2596     if (!(flags & (GUI_MON_IS_CURSOR | GUI_MON_TRS_CURSOR)))
2597     {
2598 	/* Invalidate the old physical cursor position if we wrote over it */
2599 	if (gui.cursor_row == gui.row
2600 		&& gui.cursor_col >= col
2601 		&& gui.cursor_col < col + len)
2602 	    gui.cursor_is_valid = FALSE;
2603     }
2604 
2605 #ifdef FEAT_SIGN_ICONS
2606     if (draw_sign)
2607 	/* Draw the sign on top of the spaces. */
2608 	gui_mch_drawsign(gui.row, col, gui.highlight_mask);
2609 # if defined(FEAT_NETBEANS_INTG) && (defined(FEAT_GUI_X11) \
2610 	|| defined(FEAT_GUI_GTK) || defined(FEAT_GUI_W32))
2611     if (multi_sign)
2612 	netbeans_draw_multisign_indicator(gui.row);
2613 # endif
2614 #endif
2615 
2616     return OK;
2617 }
2618 
2619 /*
2620  * Un-draw the cursor.	Actually this just redraws the character at the given
2621  * position.  The character just before it too, for when it was in bold.
2622  */
2623     void
2624 gui_undraw_cursor(void)
2625 {
2626     if (gui.cursor_is_valid)
2627     {
2628 #ifdef FEAT_HANGULIN
2629 	if (composing_hangul
2630 		    && gui.col == gui.cursor_col && gui.row == gui.cursor_row)
2631 	{
2632 	    char_u *comp_buf;
2633 	    int comp_len;
2634 
2635 	    comp_buf = hangul_composing_buffer_get(&comp_len);
2636 	    if (comp_buf)
2637 	    {
2638 		(void)gui_outstr_nowrap(comp_buf, comp_len,
2639 					GUI_MON_IS_CURSOR | GUI_MON_NOCLEAR,
2640 					gui.norm_pixel, gui.back_pixel, 0);
2641 		vim_free(comp_buf);
2642 	    }
2643 	}
2644 	else
2645 	{
2646 #endif
2647 	if (gui_redraw_block(gui.cursor_row, gui.cursor_col,
2648 			      gui.cursor_row, gui.cursor_col, GUI_MON_NOCLEAR)
2649 		&& gui.cursor_col > 0)
2650 	    (void)gui_redraw_block(gui.cursor_row, gui.cursor_col - 1,
2651 			 gui.cursor_row, gui.cursor_col - 1, GUI_MON_NOCLEAR);
2652 #ifdef FEAT_HANGULIN
2653 	    if (composing_hangul)
2654 		(void)gui_redraw_block(gui.cursor_row, gui.cursor_col + 1,
2655 			gui.cursor_row, gui.cursor_col + 1, GUI_MON_NOCLEAR);
2656 	}
2657 #endif
2658 	/* Cursor_is_valid is reset when the cursor is undrawn, also reset it
2659 	 * here in case it wasn't needed to undraw it. */
2660 	gui.cursor_is_valid = FALSE;
2661     }
2662 }
2663 
2664     void
2665 gui_redraw(
2666     int		x,
2667     int		y,
2668     int		w,
2669     int		h)
2670 {
2671     int		row1, col1, row2, col2;
2672 
2673     row1 = Y_2_ROW(y);
2674     col1 = X_2_COL(x);
2675     row2 = Y_2_ROW(y + h - 1);
2676     col2 = X_2_COL(x + w - 1);
2677 
2678     (void)gui_redraw_block(row1, col1, row2, col2, GUI_MON_NOCLEAR);
2679 
2680     /*
2681      * We may need to redraw the cursor, but don't take it upon us to change
2682      * its location after a scroll.
2683      * (maybe be more strict even and test col too?)
2684      * These things may be outside the update/clipping region and reality may
2685      * not reflect Vims internal ideas if these operations are clipped away.
2686      */
2687     if (gui.row == gui.cursor_row)
2688 	gui_update_cursor(TRUE, TRUE);
2689 }
2690 
2691 /*
2692  * Draw a rectangular block of characters, from row1 to row2 (inclusive) and
2693  * from col1 to col2 (inclusive).
2694  * Return TRUE when the character before the first drawn character has
2695  * different attributes (may have to be redrawn too).
2696  */
2697     int
2698 gui_redraw_block(
2699     int		row1,
2700     int		col1,
2701     int		row2,
2702     int		col2,
2703     int		flags)	/* flags for gui_outstr_nowrap() */
2704 {
2705     int		old_row, old_col;
2706     long_u	old_hl_mask;
2707     int		off;
2708     sattr_T	first_attr;
2709     int		idx, len;
2710     int		back, nback;
2711     int		retval = FALSE;
2712 #ifdef FEAT_MBYTE
2713     int		orig_col1, orig_col2;
2714 #endif
2715 
2716     /* Don't try to update when ScreenLines is not valid */
2717     if (!screen_cleared || ScreenLines == NULL)
2718 	return retval;
2719 
2720     /* Don't try to draw outside the shell! */
2721     /* Check everything, strange values may be caused by a big border width */
2722     col1 = check_col(col1);
2723     col2 = check_col(col2);
2724     row1 = check_row(row1);
2725     row2 = check_row(row2);
2726 
2727     /* Remember where our cursor was */
2728     old_row = gui.row;
2729     old_col = gui.col;
2730     old_hl_mask = gui.highlight_mask;
2731 #ifdef FEAT_MBYTE
2732     orig_col1 = col1;
2733     orig_col2 = col2;
2734 #endif
2735 
2736     for (gui.row = row1; gui.row <= row2; gui.row++)
2737     {
2738 #ifdef FEAT_MBYTE
2739 	/* When only half of a double-wide character is in the block, include
2740 	 * the other half. */
2741 	col1 = orig_col1;
2742 	col2 = orig_col2;
2743 	off = LineOffset[gui.row];
2744 	if (enc_dbcs != 0)
2745 	{
2746 	    if (col1 > 0)
2747 		col1 -= dbcs_screen_head_off(ScreenLines + off,
2748 						    ScreenLines + off + col1);
2749 	    col2 += dbcs_screen_tail_off(ScreenLines + off,
2750 						    ScreenLines + off + col2);
2751 	}
2752 	else if (enc_utf8)
2753 	{
2754 	    if (ScreenLines[off + col1] == 0)
2755 		--col1;
2756 # ifdef FEAT_GUI_GTK
2757 	    if (col2 + 1 < Columns && ScreenLines[off + col2 + 1] == 0)
2758 		++col2;
2759 # endif
2760 	}
2761 #endif
2762 	gui.col = col1;
2763 	off = LineOffset[gui.row] + gui.col;
2764 	len = col2 - col1 + 1;
2765 
2766 	/* Find how many chars back this highlighting starts, or where a space
2767 	 * is.  Needed for when the bold trick is used */
2768 	for (back = 0; back < col1; ++back)
2769 	    if (ScreenAttrs[off - 1 - back] != ScreenAttrs[off]
2770 		    || ScreenLines[off - 1 - back] == ' ')
2771 		break;
2772 	retval = (col1 > 0 && ScreenAttrs[off - 1] != 0 && back == 0
2773 					      && ScreenLines[off - 1] != ' ');
2774 
2775 	/* Break it up in strings of characters with the same attributes. */
2776 	/* Print UTF-8 characters individually. */
2777 	while (len > 0)
2778 	{
2779 	    first_attr = ScreenAttrs[off];
2780 	    gui.highlight_mask = first_attr;
2781 #if defined(FEAT_MBYTE) && !defined(FEAT_GUI_GTK)
2782 	    if (enc_utf8 && ScreenLinesUC[off] != 0)
2783 	    {
2784 		/* output multi-byte character separately */
2785 		nback = gui_screenchar(off, flags,
2786 					  (guicolor_T)0, (guicolor_T)0, back);
2787 		if (gui.col < Columns && ScreenLines[off + 1] == 0)
2788 		    idx = 2;
2789 		else
2790 		    idx = 1;
2791 	    }
2792 	    else if (enc_dbcs == DBCS_JPNU && ScreenLines[off] == 0x8e)
2793 	    {
2794 		/* output double-byte, single-width character separately */
2795 		nback = gui_screenchar(off, flags,
2796 					  (guicolor_T)0, (guicolor_T)0, back);
2797 		idx = 1;
2798 	    }
2799 	    else
2800 #endif
2801 	    {
2802 #ifdef FEAT_GUI_GTK
2803 		for (idx = 0; idx < len; ++idx)
2804 		{
2805 		    if (enc_utf8 && ScreenLines[off + idx] == 0)
2806 			continue; /* skip second half of double-width char */
2807 		    if (ScreenAttrs[off + idx] != first_attr)
2808 			break;
2809 		}
2810 		/* gui_screenstr() takes care of multibyte chars */
2811 		nback = gui_screenstr(off, idx, flags,
2812 				      (guicolor_T)0, (guicolor_T)0, back);
2813 #else
2814 		for (idx = 0; idx < len && ScreenAttrs[off + idx] == first_attr;
2815 									idx++)
2816 		{
2817 # ifdef FEAT_MBYTE
2818 		    /* Stop at a multi-byte Unicode character. */
2819 		    if (enc_utf8 && ScreenLinesUC[off + idx] != 0)
2820 			break;
2821 		    if (enc_dbcs == DBCS_JPNU)
2822 		    {
2823 			/* Stop at a double-byte single-width char. */
2824 			if (ScreenLines[off + idx] == 0x8e)
2825 			    break;
2826 			if (len > 1 && (*mb_ptr2len)(ScreenLines
2827 							    + off + idx) == 2)
2828 			    ++idx;  /* skip second byte of double-byte char */
2829 		    }
2830 # endif
2831 		}
2832 		nback = gui_outstr_nowrap(ScreenLines + off, idx, flags,
2833 					  (guicolor_T)0, (guicolor_T)0, back);
2834 #endif
2835 	    }
2836 	    if (nback == FAIL)
2837 	    {
2838 		/* Must back up to start drawing where a bold or italic word
2839 		 * starts. */
2840 		off -= back;
2841 		len += back;
2842 		gui.col -= back;
2843 	    }
2844 	    else
2845 	    {
2846 		off += idx;
2847 		len -= idx;
2848 	    }
2849 	    back = 0;
2850 	}
2851     }
2852 
2853     /* Put the cursor back where it was */
2854     gui.row = old_row;
2855     gui.col = old_col;
2856     gui.highlight_mask = (int)old_hl_mask;
2857 
2858     return retval;
2859 }
2860 
2861     static void
2862 gui_delete_lines(int row, int count)
2863 {
2864     if (count <= 0)
2865 	return;
2866 
2867     if (row + count > gui.scroll_region_bot)
2868 	/* Scrolled out of region, just blank the lines out */
2869 	gui_clear_block(row, gui.scroll_region_left,
2870 			      gui.scroll_region_bot, gui.scroll_region_right);
2871     else
2872     {
2873 	gui_mch_delete_lines(row, count);
2874 
2875 	/* If the cursor was in the deleted lines it's now gone.  If the
2876 	 * cursor was in the scrolled lines adjust its position. */
2877 	if (gui.cursor_row >= row
2878 		&& gui.cursor_col >= gui.scroll_region_left
2879 		&& gui.cursor_col <= gui.scroll_region_right)
2880 	{
2881 	    if (gui.cursor_row < row + count)
2882 		gui.cursor_is_valid = FALSE;
2883 	    else if (gui.cursor_row <= gui.scroll_region_bot)
2884 		gui.cursor_row -= count;
2885 	}
2886     }
2887 }
2888 
2889     static void
2890 gui_insert_lines(int row, int count)
2891 {
2892     if (count <= 0)
2893 	return;
2894 
2895     if (row + count > gui.scroll_region_bot)
2896 	/* Scrolled out of region, just blank the lines out */
2897 	gui_clear_block(row, gui.scroll_region_left,
2898 			      gui.scroll_region_bot, gui.scroll_region_right);
2899     else
2900     {
2901 	gui_mch_insert_lines(row, count);
2902 
2903 	if (gui.cursor_row >= gui.row
2904 		&& gui.cursor_col >= gui.scroll_region_left
2905 		&& gui.cursor_col <= gui.scroll_region_right)
2906 	{
2907 	    if (gui.cursor_row <= gui.scroll_region_bot - count)
2908 		gui.cursor_row += count;
2909 	    else if (gui.cursor_row <= gui.scroll_region_bot)
2910 		gui.cursor_is_valid = FALSE;
2911 	}
2912     }
2913 }
2914 
2915 #ifdef FEAT_TIMERS
2916 /*
2917  * Passed to ui_wait_for_chars_or_timer(), ignoring extra arguments.
2918  */
2919     static int
2920 gui_wait_for_chars_3(
2921     long wtime,
2922     int *interrupted UNUSED,
2923     int ignore_input UNUSED)
2924 {
2925     return gui_mch_wait_for_chars(wtime);
2926 }
2927 #endif
2928 
2929 /*
2930  * Returns OK if a character was found to be available within the given time,
2931  * or FAIL otherwise.
2932  */
2933     static int
2934 gui_wait_for_chars_or_timer(long wtime)
2935 {
2936 #ifdef FEAT_TIMERS
2937     return ui_wait_for_chars_or_timer(wtime, gui_wait_for_chars_3, NULL, 0);
2938 #else
2939     return gui_mch_wait_for_chars(wtime);
2940 #endif
2941 }
2942 
2943 /*
2944  * The main GUI input routine.	Waits for a character from the keyboard.
2945  * wtime == -1	    Wait forever.
2946  * wtime == 0	    Don't wait.
2947  * wtime > 0	    Wait wtime milliseconds for a character.
2948  * Returns OK if a character was found to be available within the given time,
2949  * or FAIL otherwise.
2950  */
2951     int
2952 gui_wait_for_chars(long wtime, int tb_change_cnt)
2953 {
2954     int	    retval;
2955 #if defined(ELAPSED_FUNC)
2956     ELAPSED_TYPE start_tv;
2957 #endif
2958 
2959 #ifdef FEAT_MENU
2960     /*
2961      * If we're going to wait a bit, update the menus and mouse shape for the
2962      * current State.
2963      */
2964     if (wtime != 0)
2965 	gui_update_menus(0);
2966 #endif
2967 
2968     gui_mch_update();
2969     if (input_available())	/* Got char, return immediately */
2970 	return OK;
2971     if (wtime == 0)	/* Don't wait for char */
2972 	return FAIL;
2973 
2974     /* Before waiting, flush any output to the screen. */
2975     gui_mch_flush();
2976 
2977     if (wtime > 0)
2978     {
2979 	/* Blink when waiting for a character.	Probably only does something
2980 	 * for showmatch() */
2981 	gui_mch_start_blink();
2982 	retval = gui_wait_for_chars_or_timer(wtime);
2983 	gui_mch_stop_blink(TRUE);
2984 	return retval;
2985     }
2986 
2987 #if defined(ELAPSED_FUNC)
2988     ELAPSED_INIT(start_tv);
2989 #endif
2990 
2991     /*
2992      * While we are waiting indefinitely for a character, blink the cursor.
2993      */
2994     gui_mch_start_blink();
2995 
2996     retval = FAIL;
2997     /*
2998      * We may want to trigger the CursorHold event.  First wait for
2999      * 'updatetime' and if nothing is typed within that time, and feedkeys()
3000      * wasn't used, put the K_CURSORHOLD key in the input buffer.
3001      */
3002     if (gui_wait_for_chars_or_timer(p_ut) == OK)
3003 	retval = OK;
3004     else if (trigger_cursorhold()
3005 #ifdef ELAPSED_FUNC
3006 	    && ELAPSED_FUNC(start_tv) >= p_ut
3007 #endif
3008 	    && typebuf.tb_change_cnt == tb_change_cnt)
3009     {
3010 	char_u	buf[3];
3011 
3012 	/* Put K_CURSORHOLD in the input buffer. */
3013 	buf[0] = CSI;
3014 	buf[1] = KS_EXTRA;
3015 	buf[2] = (int)KE_CURSORHOLD;
3016 	add_to_input_buf(buf, 3);
3017 
3018 	retval = OK;
3019     }
3020 
3021     if (retval == FAIL && typebuf.tb_change_cnt == tb_change_cnt)
3022     {
3023 	/* Blocking wait. */
3024 	before_blocking();
3025 	retval = gui_wait_for_chars_or_timer(-1L);
3026     }
3027 
3028     gui_mch_stop_blink(TRUE);
3029     return retval;
3030 }
3031 
3032 /*
3033  * Equivalent of mch_inchar() for the GUI.
3034  */
3035     int
3036 gui_inchar(
3037     char_u  *buf,
3038     int	    maxlen,
3039     long    wtime,		/* milli seconds */
3040     int	    tb_change_cnt)
3041 {
3042     if (gui_wait_for_chars(wtime, tb_change_cnt)
3043 	    && !typebuf_changed(tb_change_cnt))
3044 	return read_from_input_buf(buf, (long)maxlen);
3045     return 0;
3046 }
3047 
3048 /*
3049  * Fill p[4] with mouse coordinates encoded for check_termcode().
3050  */
3051     static void
3052 fill_mouse_coord(char_u *p, int col, int row)
3053 {
3054     p[0] = (char_u)(col / 128 + ' ' + 1);
3055     p[1] = (char_u)(col % 128 + ' ' + 1);
3056     p[2] = (char_u)(row / 128 + ' ' + 1);
3057     p[3] = (char_u)(row % 128 + ' ' + 1);
3058 }
3059 
3060 /*
3061  * Generic mouse support function.  Add a mouse event to the input buffer with
3062  * the given properties.
3063  *  button	    --- may be any of MOUSE_LEFT, MOUSE_MIDDLE, MOUSE_RIGHT,
3064  *			MOUSE_X1, MOUSE_X2
3065  *			MOUSE_DRAG, or MOUSE_RELEASE.
3066  *			MOUSE_4 and MOUSE_5 are used for vertical scroll wheel,
3067  *			MOUSE_6 and MOUSE_7 for horizontal scroll wheel.
3068  *  x, y	    --- Coordinates of mouse in pixels.
3069  *  repeated_click  --- TRUE if this click comes only a short time after a
3070  *			previous click.
3071  *  modifiers	    --- Bit field which may be any of the following modifiers
3072  *			or'ed together: MOUSE_SHIFT | MOUSE_CTRL | MOUSE_ALT.
3073  * This function will ignore drag events where the mouse has not moved to a new
3074  * character.
3075  */
3076     void
3077 gui_send_mouse_event(
3078     int	    button,
3079     int	    x,
3080     int	    y,
3081     int	    repeated_click,
3082     int_u   modifiers)
3083 {
3084     static int	    prev_row = 0, prev_col = 0;
3085     static int	    prev_button = -1;
3086     static int	    num_clicks = 1;
3087     char_u	    string[10];
3088     enum key_extra  button_char;
3089     int		    row, col;
3090 #ifdef FEAT_CLIPBOARD
3091     int		    checkfor;
3092     int		    did_clip = FALSE;
3093 #endif
3094 
3095     /*
3096      * Scrolling may happen at any time, also while a selection is present.
3097      */
3098     switch (button)
3099     {
3100 	case MOUSE_X1:
3101 	    button_char = KE_X1MOUSE;
3102 	    goto button_set;
3103 	case MOUSE_X2:
3104 	    button_char = KE_X2MOUSE;
3105 	    goto button_set;
3106 	case MOUSE_4:
3107 	    button_char = KE_MOUSEDOWN;
3108 	    goto button_set;
3109 	case MOUSE_5:
3110 	    button_char = KE_MOUSEUP;
3111 	    goto button_set;
3112 	case MOUSE_6:
3113 	    button_char = KE_MOUSELEFT;
3114 	    goto button_set;
3115 	case MOUSE_7:
3116 	    button_char = KE_MOUSERIGHT;
3117 button_set:
3118 	    {
3119 		/* Don't put events in the input queue now. */
3120 		if (hold_gui_events)
3121 		    return;
3122 
3123 		string[3] = CSI;
3124 		string[4] = KS_EXTRA;
3125 		string[5] = (int)button_char;
3126 
3127 		/* Pass the pointer coordinates of the scroll event so that we
3128 		 * know which window to scroll. */
3129 		row = gui_xy2colrow(x, y, &col);
3130 		string[6] = (char_u)(col / 128 + ' ' + 1);
3131 		string[7] = (char_u)(col % 128 + ' ' + 1);
3132 		string[8] = (char_u)(row / 128 + ' ' + 1);
3133 		string[9] = (char_u)(row % 128 + ' ' + 1);
3134 
3135 		if (modifiers == 0)
3136 		    add_to_input_buf(string + 3, 7);
3137 		else
3138 		{
3139 		    string[0] = CSI;
3140 		    string[1] = KS_MODIFIER;
3141 		    string[2] = 0;
3142 		    if (modifiers & MOUSE_SHIFT)
3143 			string[2] |= MOD_MASK_SHIFT;
3144 		    if (modifiers & MOUSE_CTRL)
3145 			string[2] |= MOD_MASK_CTRL;
3146 		    if (modifiers & MOUSE_ALT)
3147 			string[2] |= MOD_MASK_ALT;
3148 		    add_to_input_buf(string, 10);
3149 		}
3150 		return;
3151 	    }
3152     }
3153 
3154 #ifdef FEAT_CLIPBOARD
3155     /* If a clipboard selection is in progress, handle it */
3156     if (clip_star.state == SELECT_IN_PROGRESS)
3157     {
3158 	clip_process_selection(button, X_2_COL(x), Y_2_ROW(y), repeated_click);
3159 	return;
3160     }
3161 
3162     /* Determine which mouse settings to look for based on the current mode */
3163     switch (get_real_state())
3164     {
3165 	case NORMAL_BUSY:
3166 	case OP_PENDING:
3167 # ifdef FEAT_TERMINAL
3168 	case TERMINAL:
3169 # endif
3170 	case NORMAL:		checkfor = MOUSE_NORMAL;	break;
3171 	case VISUAL:		checkfor = MOUSE_VISUAL;	break;
3172 	case SELECTMODE:	checkfor = MOUSE_VISUAL;	break;
3173 	case REPLACE:
3174 	case REPLACE+LANGMAP:
3175 # ifdef FEAT_VREPLACE
3176 	case VREPLACE:
3177 	case VREPLACE+LANGMAP:
3178 # endif
3179 	case INSERT:
3180 	case INSERT+LANGMAP:	checkfor = MOUSE_INSERT;	break;
3181 	case ASKMORE:
3182 	case HITRETURN:		/* At the more- and hit-enter prompt pass the
3183 				   mouse event for a click on or below the
3184 				   message line. */
3185 				if (Y_2_ROW(y) >= msg_row)
3186 				    checkfor = MOUSE_NORMAL;
3187 				else
3188 				    checkfor = MOUSE_RETURN;
3189 				break;
3190 
3191 	    /*
3192 	     * On the command line, use the clipboard selection on all lines
3193 	     * but the command line.  But not when pasting.
3194 	     */
3195 	case CMDLINE:
3196 	case CMDLINE+LANGMAP:
3197 	    if (Y_2_ROW(y) < cmdline_row && button != MOUSE_MIDDLE)
3198 		checkfor = MOUSE_NONE;
3199 	    else
3200 		checkfor = MOUSE_COMMAND;
3201 	    break;
3202 
3203 	default:
3204 	    checkfor = MOUSE_NONE;
3205 	    break;
3206     };
3207 
3208     /*
3209      * Allow clipboard selection of text on the command line in "normal"
3210      * modes.  Don't do this when dragging the status line, or extending a
3211      * Visual selection.
3212      */
3213     if ((State == NORMAL || State == NORMAL_BUSY || (State & INSERT))
3214 	    && Y_2_ROW(y) >= topframe->fr_height + firstwin->w_winrow
3215 	    && button != MOUSE_DRAG
3216 # ifdef FEAT_MOUSESHAPE
3217 	    && !drag_status_line
3218 	    && !drag_sep_line
3219 # endif
3220 	    )
3221 	checkfor = MOUSE_NONE;
3222 
3223     /*
3224      * Use modeless selection when holding CTRL and SHIFT pressed.
3225      */
3226     if ((modifiers & MOUSE_CTRL) && (modifiers & MOUSE_SHIFT))
3227 	checkfor = MOUSE_NONEF;
3228 
3229     /*
3230      * In Ex mode, always use modeless selection.
3231      */
3232     if (exmode_active)
3233 	checkfor = MOUSE_NONE;
3234 
3235     /*
3236      * If the mouse settings say to not use the mouse, use the modeless
3237      * selection.  But if Visual is active, assume that only the Visual area
3238      * will be selected.
3239      * Exception: On the command line, both the selection is used and a mouse
3240      * key is send.
3241      */
3242     if (!mouse_has(checkfor) || checkfor == MOUSE_COMMAND)
3243     {
3244 	/* Don't do modeless selection in Visual mode. */
3245 	if (checkfor != MOUSE_NONEF && VIsual_active && (State & NORMAL))
3246 	    return;
3247 
3248 	/*
3249 	 * When 'mousemodel' is "popup", shift-left is translated to right.
3250 	 * But not when also using Ctrl.
3251 	 */
3252 	if (mouse_model_popup() && button == MOUSE_LEFT
3253 		&& (modifiers & MOUSE_SHIFT) && !(modifiers & MOUSE_CTRL))
3254 	{
3255 	    button = MOUSE_RIGHT;
3256 	    modifiers &= ~ MOUSE_SHIFT;
3257 	}
3258 
3259 	/* If the selection is done, allow the right button to extend it.
3260 	 * If the selection is cleared, allow the right button to start it
3261 	 * from the cursor position. */
3262 	if (button == MOUSE_RIGHT)
3263 	{
3264 	    if (clip_star.state == SELECT_CLEARED)
3265 	    {
3266 		if (State & CMDLINE)
3267 		{
3268 		    col = msg_col;
3269 		    row = msg_row;
3270 		}
3271 		else
3272 		{
3273 		    col = curwin->w_wcol;
3274 		    row = curwin->w_wrow + W_WINROW(curwin);
3275 		}
3276 		clip_start_selection(col, row, FALSE);
3277 	    }
3278 	    clip_process_selection(button, X_2_COL(x), Y_2_ROW(y),
3279 							      repeated_click);
3280 	    did_clip = TRUE;
3281 	}
3282 	/* Allow the left button to start the selection */
3283 	else if (button == MOUSE_LEFT)
3284 	{
3285 	    clip_start_selection(X_2_COL(x), Y_2_ROW(y), repeated_click);
3286 	    did_clip = TRUE;
3287 	}
3288 
3289 	/* Always allow pasting */
3290 	if (button != MOUSE_MIDDLE)
3291 	{
3292 	    if (!mouse_has(checkfor) || button == MOUSE_RELEASE)
3293 		return;
3294 	    if (checkfor != MOUSE_COMMAND)
3295 		button = MOUSE_LEFT;
3296 	}
3297 	repeated_click = FALSE;
3298     }
3299 
3300     if (clip_star.state != SELECT_CLEARED && !did_clip)
3301 	clip_clear_selection(&clip_star);
3302 #endif
3303 
3304     /* Don't put events in the input queue now. */
3305     if (hold_gui_events)
3306 	return;
3307 
3308     row = gui_xy2colrow(x, y, &col);
3309 
3310     /*
3311      * If we are dragging and the mouse hasn't moved far enough to be on a
3312      * different character, then don't send an event to vim.
3313      */
3314     if (button == MOUSE_DRAG)
3315     {
3316 	if (row == prev_row && col == prev_col)
3317 	    return;
3318 	/* Dragging above the window, set "row" to -1 to cause a scroll. */
3319 	if (y < 0)
3320 	    row = -1;
3321     }
3322 
3323     /*
3324      * If topline has changed (window scrolled) since the last click, reset
3325      * repeated_click, because we don't want starting Visual mode when
3326      * clicking on a different character in the text.
3327      */
3328     if (curwin->w_topline != gui_prev_topline
3329 #ifdef FEAT_DIFF
3330 	    || curwin->w_topfill != gui_prev_topfill
3331 #endif
3332 	    )
3333 	repeated_click = FALSE;
3334 
3335     string[0] = CSI;	/* this sequence is recognized by check_termcode() */
3336     string[1] = KS_MOUSE;
3337     string[2] = KE_FILLER;
3338     if (button != MOUSE_DRAG && button != MOUSE_RELEASE)
3339     {
3340 	if (repeated_click)
3341 	{
3342 	    /*
3343 	     * Handle multiple clicks.	They only count if the mouse is still
3344 	     * pointing at the same character.
3345 	     */
3346 	    if (button != prev_button || row != prev_row || col != prev_col)
3347 		num_clicks = 1;
3348 	    else if (++num_clicks > 4)
3349 		num_clicks = 1;
3350 	}
3351 	else
3352 	    num_clicks = 1;
3353 	prev_button = button;
3354 	gui_prev_topline = curwin->w_topline;
3355 #ifdef FEAT_DIFF
3356 	gui_prev_topfill = curwin->w_topfill;
3357 #endif
3358 
3359 	string[3] = (char_u)(button | 0x20);
3360 	SET_NUM_MOUSE_CLICKS(string[3], num_clicks);
3361     }
3362     else
3363 	string[3] = (char_u)button;
3364 
3365     string[3] |= modifiers;
3366     fill_mouse_coord(string + 4, col, row);
3367     add_to_input_buf(string, 8);
3368 
3369     if (row < 0)
3370 	prev_row = 0;
3371     else
3372 	prev_row = row;
3373     prev_col = col;
3374 
3375     /*
3376      * We need to make sure this is cleared since Athena doesn't tell us when
3377      * he is done dragging.  Neither does GTK+ 2 -- at least for now.
3378      */
3379 #if defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_GTK)
3380     gui.dragged_sb = SBAR_NONE;
3381 #endif
3382 }
3383 
3384 /*
3385  * Convert x and y coordinate to column and row in text window.
3386  * Corrects for multi-byte character.
3387  * returns column in "*colp" and row as return value;
3388  */
3389     int
3390 gui_xy2colrow(int x, int y, int *colp)
3391 {
3392     int		col = check_col(X_2_COL(x));
3393     int		row = check_row(Y_2_ROW(y));
3394 
3395 #ifdef FEAT_MBYTE
3396     *colp = mb_fix_col(col, row);
3397 #else
3398     *colp = col;
3399 #endif
3400     return row;
3401 }
3402 
3403 #if defined(FEAT_MENU) || defined(PROTO)
3404 /*
3405  * Callback function for when a menu entry has been selected.
3406  */
3407     void
3408 gui_menu_cb(vimmenu_T *menu)
3409 {
3410     char_u  bytes[sizeof(long_u)];
3411 
3412     /* Don't put events in the input queue now. */
3413     if (hold_gui_events)
3414 	return;
3415 
3416     bytes[0] = CSI;
3417     bytes[1] = KS_MENU;
3418     bytes[2] = KE_FILLER;
3419     add_to_input_buf(bytes, 3);
3420     add_long_to_buf((long_u)menu, bytes);
3421     add_to_input_buf_csi(bytes, sizeof(long_u));
3422 }
3423 #endif
3424 
3425 static int	prev_which_scrollbars[3];
3426 
3427 /*
3428  * Set which components are present.
3429  * If "oldval" is not NULL, "oldval" is the previous value, the new value is
3430  * in p_go.
3431  */
3432     void
3433 gui_init_which_components(char_u *oldval UNUSED)
3434 {
3435 #ifdef FEAT_MENU
3436     static int	prev_menu_is_active = -1;
3437 #endif
3438 #ifdef FEAT_TOOLBAR
3439     static int	prev_toolbar = -1;
3440     int		using_toolbar = FALSE;
3441 #endif
3442 #ifdef FEAT_GUI_TABLINE
3443     int		using_tabline;
3444 #endif
3445 #ifdef FEAT_FOOTER
3446     static int	prev_footer = -1;
3447     int		using_footer = FALSE;
3448 #endif
3449 #if defined(FEAT_MENU)
3450     static int	prev_tearoff = -1;
3451     int		using_tearoff = FALSE;
3452 #endif
3453 
3454     char_u	*p;
3455     int		i;
3456 #ifdef FEAT_MENU
3457     int		grey_old, grey_new;
3458     char_u	*temp;
3459 #endif
3460     win_T	*wp;
3461     int		need_set_size;
3462     int		fix_size;
3463 
3464 #ifdef FEAT_MENU
3465     if (oldval != NULL && gui.in_use)
3466     {
3467 	/*
3468 	 * Check if the menu's go from grey to non-grey or vise versa.
3469 	 */
3470 	grey_old = (vim_strchr(oldval, GO_GREY) != NULL);
3471 	grey_new = (vim_strchr(p_go, GO_GREY) != NULL);
3472 	if (grey_old != grey_new)
3473 	{
3474 	    temp = p_go;
3475 	    p_go = oldval;
3476 	    gui_update_menus(MENU_ALL_MODES);
3477 	    p_go = temp;
3478 	}
3479     }
3480     gui.menu_is_active = FALSE;
3481 #endif
3482 
3483     for (i = 0; i < 3; i++)
3484 	gui.which_scrollbars[i] = FALSE;
3485     for (p = p_go; *p; p++)
3486 	switch (*p)
3487 	{
3488 	    case GO_LEFT:
3489 		gui.which_scrollbars[SBAR_LEFT] = TRUE;
3490 		break;
3491 	    case GO_RIGHT:
3492 		gui.which_scrollbars[SBAR_RIGHT] = TRUE;
3493 		break;
3494 	    case GO_VLEFT:
3495 		if (win_hasvertsplit())
3496 		    gui.which_scrollbars[SBAR_LEFT] = TRUE;
3497 		break;
3498 	    case GO_VRIGHT:
3499 		if (win_hasvertsplit())
3500 		    gui.which_scrollbars[SBAR_RIGHT] = TRUE;
3501 		break;
3502 	    case GO_BOT:
3503 		gui.which_scrollbars[SBAR_BOTTOM] = TRUE;
3504 		break;
3505 #ifdef FEAT_MENU
3506 	    case GO_MENUS:
3507 		gui.menu_is_active = TRUE;
3508 		break;
3509 #endif
3510 	    case GO_GREY:
3511 		/* make menu's have grey items, ignored here */
3512 		break;
3513 #ifdef FEAT_TOOLBAR
3514 	    case GO_TOOLBAR:
3515 		using_toolbar = TRUE;
3516 		break;
3517 #endif
3518 #ifdef FEAT_FOOTER
3519 	    case GO_FOOTER:
3520 		using_footer = TRUE;
3521 		break;
3522 #endif
3523 	    case GO_TEAROFF:
3524 #if defined(FEAT_MENU)
3525 		using_tearoff = TRUE;
3526 #endif
3527 		break;
3528 	    default:
3529 		/* Ignore options that are not supported */
3530 		break;
3531 	}
3532 
3533     if (gui.in_use)
3534     {
3535 	need_set_size = 0;
3536 	fix_size = FALSE;
3537 
3538 #ifdef FEAT_GUI_TABLINE
3539 	/* Update the GUI tab line, it may appear or disappear.  This may
3540 	 * cause the non-GUI tab line to disappear or appear. */
3541 	using_tabline = gui_has_tabline();
3542 	if (!gui_mch_showing_tabline() != !using_tabline)
3543 	{
3544 	    /* We don't want a resize event change "Rows" here, save and
3545 	     * restore it.  Resizing is handled below. */
3546 	    i = Rows;
3547 	    gui_update_tabline();
3548 	    Rows = i;
3549 	    need_set_size |= RESIZE_VERT;
3550 	    if (using_tabline)
3551 		fix_size = TRUE;
3552 	    if (!gui_use_tabline())
3553 		redraw_tabline = TRUE;    /* may draw non-GUI tab line */
3554 	}
3555 #endif
3556 
3557 	for (i = 0; i < 3; i++)
3558 	{
3559 	    /* The scrollbar needs to be updated when it is shown/unshown and
3560 	     * when switching tab pages.  But the size only changes when it's
3561 	     * shown/unshown.  Thus we need two places to remember whether a
3562 	     * scrollbar is there or not. */
3563 	    if (gui.which_scrollbars[i] != prev_which_scrollbars[i]
3564 		    || gui.which_scrollbars[i]
3565 					!= curtab->tp_prev_which_scrollbars[i])
3566 	    {
3567 		if (i == SBAR_BOTTOM)
3568 		    gui_mch_enable_scrollbar(&gui.bottom_sbar,
3569 						     gui.which_scrollbars[i]);
3570 		else
3571 		{
3572 		    FOR_ALL_WINDOWS(wp)
3573 		    {
3574 			gui_do_scrollbar(wp, i, gui.which_scrollbars[i]);
3575 		    }
3576 		}
3577 		if (gui.which_scrollbars[i] != prev_which_scrollbars[i])
3578 		{
3579 		    if (i == SBAR_BOTTOM)
3580 			need_set_size |= RESIZE_VERT;
3581 		    else
3582 			need_set_size |= RESIZE_HOR;
3583 		    if (gui.which_scrollbars[i])
3584 			fix_size = TRUE;
3585 		}
3586 	    }
3587 	    curtab->tp_prev_which_scrollbars[i] = gui.which_scrollbars[i];
3588 	    prev_which_scrollbars[i] = gui.which_scrollbars[i];
3589 	}
3590 
3591 #ifdef FEAT_MENU
3592 	if (gui.menu_is_active != prev_menu_is_active)
3593 	{
3594 	    /* We don't want a resize event change "Rows" here, save and
3595 	     * restore it.  Resizing is handled below. */
3596 	    i = Rows;
3597 	    gui_mch_enable_menu(gui.menu_is_active);
3598 	    Rows = i;
3599 	    prev_menu_is_active = gui.menu_is_active;
3600 	    need_set_size |= RESIZE_VERT;
3601 	    if (gui.menu_is_active)
3602 		fix_size = TRUE;
3603 	}
3604 #endif
3605 
3606 #ifdef FEAT_TOOLBAR
3607 	if (using_toolbar != prev_toolbar)
3608 	{
3609 	    gui_mch_show_toolbar(using_toolbar);
3610 	    prev_toolbar = using_toolbar;
3611 	    need_set_size |= RESIZE_VERT;
3612 	    if (using_toolbar)
3613 		fix_size = TRUE;
3614 	}
3615 #endif
3616 #ifdef FEAT_FOOTER
3617 	if (using_footer != prev_footer)
3618 	{
3619 	    gui_mch_enable_footer(using_footer);
3620 	    prev_footer = using_footer;
3621 	    need_set_size |= RESIZE_VERT;
3622 	    if (using_footer)
3623 		fix_size = TRUE;
3624 	}
3625 #endif
3626 #if defined(FEAT_MENU) && !(defined(WIN3264) && !defined(FEAT_TEAROFF))
3627 	if (using_tearoff != prev_tearoff)
3628 	{
3629 	    gui_mch_toggle_tearoffs(using_tearoff);
3630 	    prev_tearoff = using_tearoff;
3631 	}
3632 #endif
3633 	if (need_set_size != 0)
3634 	{
3635 #ifdef FEAT_GUI_GTK
3636 	    long    prev_Columns = Columns;
3637 	    long    prev_Rows = Rows;
3638 #endif
3639 	    /* Adjust the size of the window to make the text area keep the
3640 	     * same size and to avoid that part of our window is off-screen
3641 	     * and a scrollbar can't be used, for example. */
3642 	    gui_set_shellsize(FALSE, fix_size, need_set_size);
3643 
3644 #ifdef FEAT_GUI_GTK
3645 	    /* GTK has the annoying habit of sending us resize events when
3646 	     * changing the window size ourselves.  This mostly happens when
3647 	     * waiting for a character to arrive, quite unpredictably, and may
3648 	     * change Columns and Rows when we don't want it.  Wait for a
3649 	     * character here to avoid this effect.
3650 	     * If you remove this, please test this command for resizing
3651 	     * effects (with optional left scrollbar): ":vsp|q|vsp|q|vsp|q".
3652 	     * Don't do this while starting up though.
3653 	     * Don't change Rows when adding menu/toolbar/tabline.
3654 	     * Don't change Columns when adding vertical toolbar. */
3655 	    if (!gui.starting && need_set_size != (RESIZE_VERT | RESIZE_HOR))
3656 		(void)char_avail();
3657 	    if ((need_set_size & RESIZE_VERT) == 0)
3658 		Rows = prev_Rows;
3659 	    if ((need_set_size & RESIZE_HOR) == 0)
3660 		Columns = prev_Columns;
3661 #endif
3662 	}
3663 	/* When the console tabline appears or disappears the window positions
3664 	 * change. */
3665 	if (firstwin->w_winrow != tabline_height())
3666 	    shell_new_rows();	/* recompute window positions and heights */
3667     }
3668 }
3669 
3670 #if defined(FEAT_GUI_TABLINE) || defined(PROTO)
3671 /*
3672  * Return TRUE if the GUI is taking care of the tabline.
3673  * It may still be hidden if 'showtabline' is zero.
3674  */
3675     int
3676 gui_use_tabline(void)
3677 {
3678     return gui.in_use && vim_strchr(p_go, GO_TABLINE) != NULL;
3679 }
3680 
3681 /*
3682  * Return TRUE if the GUI is showing the tabline.
3683  * This uses 'showtabline'.
3684  */
3685     static int
3686 gui_has_tabline(void)
3687 {
3688     if (!gui_use_tabline()
3689 	    || p_stal == 0
3690 	    || (p_stal == 1 && first_tabpage->tp_next == NULL))
3691 	return FALSE;
3692     return TRUE;
3693 }
3694 
3695 /*
3696  * Update the tabline.
3697  * This may display/undisplay the tabline and update the labels.
3698  */
3699     void
3700 gui_update_tabline(void)
3701 {
3702     int	    showit = gui_has_tabline();
3703     int	    shown = gui_mch_showing_tabline();
3704 
3705     if (!gui.starting && starting == 0)
3706     {
3707 	/* Updating the tabline uses direct GUI commands, flush
3708 	 * outstanding instructions first. (esp. clear screen) */
3709 	out_flush();
3710 
3711 	if (!showit != !shown)
3712 	    gui_mch_show_tabline(showit);
3713 	if (showit != 0)
3714 	    gui_mch_update_tabline();
3715 
3716 	/* When the tabs change from hidden to shown or from shown to
3717 	 * hidden the size of the text area should remain the same. */
3718 	if (!showit != !shown)
3719 	    gui_set_shellsize(FALSE, showit, RESIZE_VERT);
3720     }
3721 }
3722 
3723 /*
3724  * Get the label or tooltip for tab page "tp" into NameBuff[].
3725  */
3726     void
3727 get_tabline_label(
3728     tabpage_T	*tp,
3729     int		tooltip)	/* TRUE: get tooltip */
3730 {
3731     int		modified = FALSE;
3732     char_u	buf[40];
3733     int		wincount;
3734     win_T	*wp;
3735     char_u	**opt;
3736 
3737     /* Use 'guitablabel' or 'guitabtooltip' if it's set. */
3738     opt = (tooltip ? &p_gtt : &p_gtl);
3739     if (**opt != NUL)
3740     {
3741 	int	use_sandbox = FALSE;
3742 	int	save_called_emsg = called_emsg;
3743 	char_u	res[MAXPATHL];
3744 	tabpage_T *save_curtab;
3745 	char_u	*opt_name = (char_u *)(tooltip ? "guitabtooltip"
3746 							     : "guitablabel");
3747 
3748 	called_emsg = FALSE;
3749 
3750 	printer_page_num = tabpage_index(tp);
3751 # ifdef FEAT_EVAL
3752 	set_vim_var_nr(VV_LNUM, printer_page_num);
3753 	use_sandbox = was_set_insecurely(opt_name, 0);
3754 # endif
3755 	/* It's almost as going to the tabpage, but without autocommands. */
3756 	curtab->tp_firstwin = firstwin;
3757 	curtab->tp_lastwin = lastwin;
3758 	curtab->tp_curwin = curwin;
3759 	save_curtab = curtab;
3760 	curtab = tp;
3761 	topframe = curtab->tp_topframe;
3762 	firstwin = curtab->tp_firstwin;
3763 	lastwin = curtab->tp_lastwin;
3764 	curwin = curtab->tp_curwin;
3765 	curbuf = curwin->w_buffer;
3766 
3767 	/* Can't use NameBuff directly, build_stl_str_hl() uses it. */
3768 	build_stl_str_hl(curwin, res, MAXPATHL, *opt, use_sandbox,
3769 						 0, (int)Columns, NULL, NULL);
3770 	STRCPY(NameBuff, res);
3771 
3772 	/* Back to the original curtab. */
3773 	curtab = save_curtab;
3774 	topframe = curtab->tp_topframe;
3775 	firstwin = curtab->tp_firstwin;
3776 	lastwin = curtab->tp_lastwin;
3777 	curwin = curtab->tp_curwin;
3778 	curbuf = curwin->w_buffer;
3779 
3780 	if (called_emsg)
3781 	    set_string_option_direct(opt_name, -1,
3782 					   (char_u *)"", OPT_FREE, SID_ERROR);
3783 	called_emsg |= save_called_emsg;
3784     }
3785 
3786     /* If 'guitablabel'/'guitabtooltip' is not set or the result is empty then
3787      * use a default label. */
3788     if (**opt == NUL || *NameBuff == NUL)
3789     {
3790 	/* Get the buffer name into NameBuff[] and shorten it. */
3791 	get_trans_bufname(tp == curtab ? curbuf : tp->tp_curwin->w_buffer);
3792 	if (!tooltip)
3793 	    shorten_dir(NameBuff);
3794 
3795 	wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
3796 	for (wincount = 0; wp != NULL; wp = wp->w_next, ++wincount)
3797 	    if (bufIsChanged(wp->w_buffer))
3798 		modified = TRUE;
3799 	if (modified || wincount > 1)
3800 	{
3801 	    if (wincount > 1)
3802 		vim_snprintf((char *)buf, sizeof(buf), "%d", wincount);
3803 	    else
3804 		buf[0] = NUL;
3805 	    if (modified)
3806 		STRCAT(buf, "+");
3807 	    STRCAT(buf, " ");
3808 	    STRMOVE(NameBuff + STRLEN(buf), NameBuff);
3809 	    mch_memmove(NameBuff, buf, STRLEN(buf));
3810 	}
3811     }
3812 }
3813 
3814 /*
3815  * Send the event for clicking to select tab page "nr".
3816  * Returns TRUE if it was done, FALSE when skipped because we are already at
3817  * that tab page or the cmdline window is open.
3818  */
3819     int
3820 send_tabline_event(int nr)
3821 {
3822     char_u string[3];
3823 
3824     if (nr == tabpage_index(curtab))
3825 	return FALSE;
3826 
3827     /* Don't put events in the input queue now. */
3828     if (hold_gui_events
3829 # ifdef FEAT_CMDWIN
3830 	    || cmdwin_type != 0
3831 # endif
3832 	    )
3833     {
3834 	/* Set it back to the current tab page. */
3835 	gui_mch_set_curtab(tabpage_index(curtab));
3836 	return FALSE;
3837     }
3838 
3839     string[0] = CSI;
3840     string[1] = KS_TABLINE;
3841     string[2] = KE_FILLER;
3842     add_to_input_buf(string, 3);
3843     string[0] = nr;
3844     add_to_input_buf_csi(string, 1);
3845     return TRUE;
3846 }
3847 
3848 /*
3849  * Send a tabline menu event
3850  */
3851     void
3852 send_tabline_menu_event(int tabidx, int event)
3853 {
3854     char_u	    string[3];
3855 
3856     /* Don't put events in the input queue now. */
3857     if (hold_gui_events)
3858 	return;
3859 
3860     string[0] = CSI;
3861     string[1] = KS_TABMENU;
3862     string[2] = KE_FILLER;
3863     add_to_input_buf(string, 3);
3864     string[0] = tabidx;
3865     string[1] = (char_u)(long)event;
3866     add_to_input_buf_csi(string, 2);
3867 }
3868 
3869 #endif
3870 
3871 /*
3872  * Scrollbar stuff:
3873  */
3874 
3875 /*
3876  * Remove all scrollbars.  Used before switching to another tab page.
3877  */
3878     void
3879 gui_remove_scrollbars(void)
3880 {
3881     int	    i;
3882     win_T   *wp;
3883 
3884     for (i = 0; i < 3; i++)
3885     {
3886 	if (i == SBAR_BOTTOM)
3887 	    gui_mch_enable_scrollbar(&gui.bottom_sbar, FALSE);
3888 	else
3889 	{
3890 	    FOR_ALL_WINDOWS(wp)
3891 	    {
3892 		gui_do_scrollbar(wp, i, FALSE);
3893 	    }
3894 	}
3895 	curtab->tp_prev_which_scrollbars[i] = -1;
3896     }
3897 }
3898 
3899     void
3900 gui_create_scrollbar(scrollbar_T *sb, int type, win_T *wp)
3901 {
3902     static int	sbar_ident = 0;
3903 
3904     sb->ident = sbar_ident++;	/* No check for too big, but would it happen? */
3905     sb->wp = wp;
3906     sb->type = type;
3907     sb->value = 0;
3908 #ifdef FEAT_GUI_ATHENA
3909     sb->pixval = 0;
3910 #endif
3911     sb->size = 1;
3912     sb->max = 1;
3913     sb->top = 0;
3914     sb->height = 0;
3915     sb->width = 0;
3916     sb->status_height = 0;
3917     gui_mch_create_scrollbar(sb, (wp == NULL) ? SBAR_HORIZ : SBAR_VERT);
3918 }
3919 
3920 /*
3921  * Find the scrollbar with the given index.
3922  */
3923     scrollbar_T *
3924 gui_find_scrollbar(long ident)
3925 {
3926     win_T	*wp;
3927 
3928     if (gui.bottom_sbar.ident == ident)
3929 	return &gui.bottom_sbar;
3930     FOR_ALL_WINDOWS(wp)
3931     {
3932 	if (wp->w_scrollbars[SBAR_LEFT].ident == ident)
3933 	    return &wp->w_scrollbars[SBAR_LEFT];
3934 	if (wp->w_scrollbars[SBAR_RIGHT].ident == ident)
3935 	    return &wp->w_scrollbars[SBAR_RIGHT];
3936     }
3937     return NULL;
3938 }
3939 
3940 /*
3941  * For most systems: Put a code in the input buffer for a dragged scrollbar.
3942  *
3943  * For Win32, Macintosh and GTK+ 2:
3944  * Scrollbars seem to grab focus and vim doesn't read the input queue until
3945  * you stop dragging the scrollbar.  We get here each time the scrollbar is
3946  * dragged another pixel, but as far as the rest of vim goes, it thinks
3947  * we're just hanging in the call to DispatchMessage() in
3948  * process_message().  The DispatchMessage() call that hangs was passed a
3949  * mouse button click event in the scrollbar window. -- webb.
3950  *
3951  * Solution: Do the scrolling right here.  But only when allowed.
3952  * Ignore the scrollbars while executing an external command or when there
3953  * are still characters to be processed.
3954  */
3955     void
3956 gui_drag_scrollbar(scrollbar_T *sb, long value, int still_dragging)
3957 {
3958     win_T	*wp;
3959     int		sb_num;
3960 #ifdef USE_ON_FLY_SCROLL
3961     colnr_T	old_leftcol = curwin->w_leftcol;
3962     linenr_T	old_topline = curwin->w_topline;
3963 # ifdef FEAT_DIFF
3964     int		old_topfill = curwin->w_topfill;
3965 # endif
3966 #else
3967     char_u	bytes[sizeof(long_u)];
3968     int		byte_count;
3969 #endif
3970 
3971     if (sb == NULL)
3972 	return;
3973 
3974     /* Don't put events in the input queue now. */
3975     if (hold_gui_events)
3976 	return;
3977 
3978 #ifdef FEAT_CMDWIN
3979     if (cmdwin_type != 0 && sb->wp != curwin)
3980 	return;
3981 #endif
3982 
3983     if (still_dragging)
3984     {
3985 	if (sb->wp == NULL)
3986 	    gui.dragged_sb = SBAR_BOTTOM;
3987 	else if (sb == &sb->wp->w_scrollbars[SBAR_LEFT])
3988 	    gui.dragged_sb = SBAR_LEFT;
3989 	else
3990 	    gui.dragged_sb = SBAR_RIGHT;
3991 	gui.dragged_wp = sb->wp;
3992     }
3993     else
3994     {
3995 	gui.dragged_sb = SBAR_NONE;
3996 #ifdef FEAT_GUI_GTK
3997 	/* Keep the "dragged_wp" value until after the scrolling, for when the
3998 	 * mouse button is released.  GTK2 doesn't send the button-up event. */
3999 	gui.dragged_wp = NULL;
4000 #endif
4001     }
4002 
4003     /* Vertical sbar info is kept in the first sbar (the left one) */
4004     if (sb->wp != NULL)
4005 	sb = &sb->wp->w_scrollbars[0];
4006 
4007     /*
4008      * Check validity of value
4009      */
4010     if (value < 0)
4011 	value = 0;
4012 #ifdef SCROLL_PAST_END
4013     else if (value > sb->max)
4014 	value = sb->max;
4015 #else
4016     if (value > sb->max - sb->size + 1)
4017 	value = sb->max - sb->size + 1;
4018 #endif
4019 
4020     sb->value = value;
4021 
4022 #ifdef USE_ON_FLY_SCROLL
4023     /* When not allowed to do the scrolling right now, return.
4024      * This also checked input_available(), but that causes the first click in
4025      * a scrollbar to be ignored when Vim doesn't have focus. */
4026     if (dont_scroll)
4027 	return;
4028 #endif
4029 #ifdef FEAT_INS_EXPAND
4030     /* Disallow scrolling the current window when the completion popup menu is
4031      * visible. */
4032     if ((sb->wp == NULL || sb->wp == curwin) && pum_visible())
4033 	return;
4034 #endif
4035 
4036 #ifdef FEAT_RIGHTLEFT
4037     if (sb->wp == NULL && curwin->w_p_rl)
4038     {
4039 	value = sb->max + 1 - sb->size - value;
4040 	if (value < 0)
4041 	    value = 0;
4042     }
4043 #endif
4044 
4045     if (sb->wp != NULL)		/* vertical scrollbar */
4046     {
4047 	sb_num = 0;
4048 	for (wp = firstwin; wp != sb->wp && wp != NULL; wp = wp->w_next)
4049 	    sb_num++;
4050 	if (wp == NULL)
4051 	    return;
4052 
4053 #ifdef USE_ON_FLY_SCROLL
4054 	current_scrollbar = sb_num;
4055 	scrollbar_value = value;
4056 	if (State & NORMAL)
4057 	{
4058 	    gui_do_scroll();
4059 	    setcursor();
4060 	}
4061 	else if (State & INSERT)
4062 	{
4063 	    ins_scroll();
4064 	    setcursor();
4065 	}
4066 	else if (State & CMDLINE)
4067 	{
4068 	    if (msg_scrolled == 0)
4069 	    {
4070 		gui_do_scroll();
4071 		redrawcmdline();
4072 	    }
4073 	}
4074 # ifdef FEAT_FOLDING
4075 	/* Value may have been changed for closed fold. */
4076 	sb->value = sb->wp->w_topline - 1;
4077 # endif
4078 
4079 	/* When dragging one scrollbar and there is another one at the other
4080 	 * side move the thumb of that one too. */
4081 	if (gui.which_scrollbars[SBAR_RIGHT] && gui.which_scrollbars[SBAR_LEFT])
4082 	    gui_mch_set_scrollbar_thumb(
4083 		    &sb->wp->w_scrollbars[
4084 			    sb == &sb->wp->w_scrollbars[SBAR_RIGHT]
4085 						    ? SBAR_LEFT : SBAR_RIGHT],
4086 		    sb->value, sb->size, sb->max);
4087 
4088 #else
4089 	bytes[0] = CSI;
4090 	bytes[1] = KS_VER_SCROLLBAR;
4091 	bytes[2] = KE_FILLER;
4092 	bytes[3] = (char_u)sb_num;
4093 	byte_count = 4;
4094 #endif
4095     }
4096     else
4097     {
4098 #ifdef USE_ON_FLY_SCROLL
4099 	scrollbar_value = value;
4100 
4101 	if (State & NORMAL)
4102 	    gui_do_horiz_scroll(scrollbar_value, FALSE);
4103 	else if (State & INSERT)
4104 	    ins_horscroll();
4105 	else if (State & CMDLINE)
4106 	{
4107 	    if (msg_scrolled == 0)
4108 	    {
4109 		gui_do_horiz_scroll(scrollbar_value, FALSE);
4110 		redrawcmdline();
4111 	    }
4112 	}
4113 	if (old_leftcol != curwin->w_leftcol)
4114 	{
4115 	    updateWindow(curwin);   /* update window, status and cmdline */
4116 	    setcursor();
4117 	}
4118 #else
4119 	bytes[0] = CSI;
4120 	bytes[1] = KS_HOR_SCROLLBAR;
4121 	bytes[2] = KE_FILLER;
4122 	byte_count = 3;
4123 #endif
4124     }
4125 
4126 #ifdef USE_ON_FLY_SCROLL
4127     /*
4128      * synchronize other windows, as necessary according to 'scrollbind'
4129      */
4130     if (curwin->w_p_scb
4131 	    && ((sb->wp == NULL && curwin->w_leftcol != old_leftcol)
4132 		|| (sb->wp == curwin && (curwin->w_topline != old_topline
4133 # ifdef FEAT_DIFF
4134 					   || curwin->w_topfill != old_topfill
4135 # endif
4136 			))))
4137     {
4138 	do_check_scrollbind(TRUE);
4139 	/* need to update the window right here */
4140 	FOR_ALL_WINDOWS(wp)
4141 	    if (wp->w_redr_type > 0)
4142 		updateWindow(wp);
4143 	setcursor();
4144     }
4145     out_flush_cursor(FALSE, TRUE);
4146 #else
4147     add_to_input_buf(bytes, byte_count);
4148     add_long_to_buf((long_u)value, bytes);
4149     add_to_input_buf_csi(bytes, sizeof(long_u));
4150 #endif
4151 }
4152 
4153 /*
4154  * Scrollbar stuff:
4155  */
4156 
4157 /*
4158  * Called when something in the window layout has changed.
4159  */
4160     void
4161 gui_may_update_scrollbars(void)
4162 {
4163     if (gui.in_use && starting == 0)
4164     {
4165 	out_flush();
4166 	gui_init_which_components(NULL);
4167 	gui_update_scrollbars(TRUE);
4168     }
4169     need_mouse_correct = TRUE;
4170 }
4171 
4172     void
4173 gui_update_scrollbars(
4174     int		force)	    /* Force all scrollbars to get updated */
4175 {
4176     win_T	*wp;
4177     scrollbar_T	*sb;
4178     long	val, size, max;		/* need 32 bits here */
4179     int		which_sb;
4180     int		h, y;
4181     static win_T *prev_curwin = NULL;
4182 
4183     /* Update the horizontal scrollbar */
4184     gui_update_horiz_scrollbar(force);
4185 
4186 #ifndef WIN3264
4187     /* Return straight away if there is neither a left nor right scrollbar.
4188      * On MS-Windows this is required anyway for scrollwheel messages. */
4189     if (!gui.which_scrollbars[SBAR_LEFT] && !gui.which_scrollbars[SBAR_RIGHT])
4190 	return;
4191 #endif
4192 
4193     /*
4194      * Don't want to update a scrollbar while we're dragging it.  But if we
4195      * have both a left and right scrollbar, and we drag one of them, we still
4196      * need to update the other one.
4197      */
4198     if (!force && (gui.dragged_sb == SBAR_LEFT || gui.dragged_sb == SBAR_RIGHT)
4199 	    && gui.which_scrollbars[SBAR_LEFT]
4200 	    && gui.which_scrollbars[SBAR_RIGHT])
4201     {
4202 	/*
4203 	 * If we have two scrollbars and one of them is being dragged, just
4204 	 * copy the scrollbar position from the dragged one to the other one.
4205 	 */
4206 	which_sb = SBAR_LEFT + SBAR_RIGHT - gui.dragged_sb;
4207 	if (gui.dragged_wp != NULL)
4208 	    gui_mch_set_scrollbar_thumb(
4209 		    &gui.dragged_wp->w_scrollbars[which_sb],
4210 		    gui.dragged_wp->w_scrollbars[0].value,
4211 		    gui.dragged_wp->w_scrollbars[0].size,
4212 		    gui.dragged_wp->w_scrollbars[0].max);
4213     }
4214 
4215     /* avoid that moving components around generates events */
4216     ++hold_gui_events;
4217 
4218     for (wp = firstwin; wp != NULL; wp = W_NEXT(wp))
4219     {
4220 	if (wp->w_buffer == NULL)	/* just in case */
4221 	    continue;
4222 	/* Skip a scrollbar that is being dragged. */
4223 	if (!force && (gui.dragged_sb == SBAR_LEFT
4224 					     || gui.dragged_sb == SBAR_RIGHT)
4225 		&& gui.dragged_wp == wp)
4226 	    continue;
4227 
4228 #ifdef SCROLL_PAST_END
4229 	max = wp->w_buffer->b_ml.ml_line_count - 1;
4230 #else
4231 	max = wp->w_buffer->b_ml.ml_line_count + wp->w_height - 2;
4232 #endif
4233 	if (max < 0)			/* empty buffer */
4234 	    max = 0;
4235 	val = wp->w_topline - 1;
4236 	size = wp->w_height;
4237 #ifdef SCROLL_PAST_END
4238 	if (val > max)			/* just in case */
4239 	    val = max;
4240 #else
4241 	if (size > max + 1)		/* just in case */
4242 	    size = max + 1;
4243 	if (val > max - size + 1)
4244 	    val = max - size + 1;
4245 #endif
4246 	if (val < 0)			/* minimal value is 0 */
4247 	    val = 0;
4248 
4249 	/*
4250 	 * Scrollbar at index 0 (the left one) contains all the information.
4251 	 * It would be the same info for left and right so we just store it for
4252 	 * one of them.
4253 	 */
4254 	sb = &wp->w_scrollbars[0];
4255 
4256 	/*
4257 	 * Note: no check for valid w_botline.	If it's not valid the
4258 	 * scrollbars will be updated later anyway.
4259 	 */
4260 	if (size < 1 || wp->w_botline - 2 > max)
4261 	{
4262 	    /*
4263 	     * This can happen during changing files.  Just don't update the
4264 	     * scrollbar for now.
4265 	     */
4266 	    sb->height = 0;	    /* Force update next time */
4267 	    if (gui.which_scrollbars[SBAR_LEFT])
4268 		gui_do_scrollbar(wp, SBAR_LEFT, FALSE);
4269 	    if (gui.which_scrollbars[SBAR_RIGHT])
4270 		gui_do_scrollbar(wp, SBAR_RIGHT, FALSE);
4271 	    continue;
4272 	}
4273 	if (force || sb->height != wp->w_height
4274 	    || sb->top != wp->w_winrow
4275 	    || sb->status_height != wp->w_status_height
4276 	    || sb->width != wp->w_width
4277 	    || prev_curwin != curwin)
4278 	{
4279 	    /* Height, width or position of scrollbar has changed.  For
4280 	     * vertical split: curwin changed. */
4281 	    sb->height = wp->w_height;
4282 	    sb->top = wp->w_winrow;
4283 	    sb->status_height = wp->w_status_height;
4284 	    sb->width = wp->w_width;
4285 
4286 	    /* Calculate height and position in pixels */
4287 	    h = (sb->height + sb->status_height) * gui.char_height;
4288 	    y = sb->top * gui.char_height + gui.border_offset;
4289 #if defined(FEAT_MENU) && !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_MOTIF) && !defined(FEAT_GUI_PHOTON)
4290 	    if (gui.menu_is_active)
4291 		y += gui.menu_height;
4292 #endif
4293 
4294 #if defined(FEAT_TOOLBAR) && (defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_ATHENA))
4295 	    if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
4296 # ifdef FEAT_GUI_ATHENA
4297 		y += gui.toolbar_height;
4298 # else
4299 #  ifdef FEAT_GUI_MSWIN
4300 		y += TOOLBAR_BUTTON_HEIGHT + TOOLBAR_BORDER_HEIGHT;
4301 #  endif
4302 # endif
4303 #endif
4304 
4305 #if defined(FEAT_GUI_TABLINE) && defined(FEAT_GUI_MSWIN)
4306 	    if (gui_has_tabline())
4307 		y += gui.tabline_height;
4308 #endif
4309 
4310 	    if (wp->w_winrow == 0)
4311 	    {
4312 		/* Height of top scrollbar includes width of top border */
4313 		h += gui.border_offset;
4314 		y -= gui.border_offset;
4315 	    }
4316 	    if (gui.which_scrollbars[SBAR_LEFT])
4317 	    {
4318 		gui_mch_set_scrollbar_pos(&wp->w_scrollbars[SBAR_LEFT],
4319 					  gui.left_sbar_x, y,
4320 					  gui.scrollbar_width, h);
4321 		gui_do_scrollbar(wp, SBAR_LEFT, TRUE);
4322 	    }
4323 	    if (gui.which_scrollbars[SBAR_RIGHT])
4324 	    {
4325 		gui_mch_set_scrollbar_pos(&wp->w_scrollbars[SBAR_RIGHT],
4326 					  gui.right_sbar_x, y,
4327 					  gui.scrollbar_width, h);
4328 		gui_do_scrollbar(wp, SBAR_RIGHT, TRUE);
4329 	    }
4330 	}
4331 
4332 	/* Reduce the number of calls to gui_mch_set_scrollbar_thumb() by
4333 	 * checking if the thumb moved at least a pixel.  Only do this for
4334 	 * Athena, most other GUIs require the update anyway to make the
4335 	 * arrows work. */
4336 #ifdef FEAT_GUI_ATHENA
4337 	if (max == 0)
4338 	    y = 0;
4339 	else
4340 	    y = (val * (sb->height + 2) * gui.char_height + max / 2) / max;
4341 	if (force || sb->pixval != y || sb->size != size || sb->max != max)
4342 #else
4343 	if (force || sb->value != val || sb->size != size || sb->max != max)
4344 #endif
4345 	{
4346 	    /* Thumb of scrollbar has moved */
4347 	    sb->value = val;
4348 #ifdef FEAT_GUI_ATHENA
4349 	    sb->pixval = y;
4350 #endif
4351 	    sb->size = size;
4352 	    sb->max = max;
4353 	    if (gui.which_scrollbars[SBAR_LEFT]
4354 		    && (gui.dragged_sb != SBAR_LEFT || gui.dragged_wp != wp))
4355 		gui_mch_set_scrollbar_thumb(&wp->w_scrollbars[SBAR_LEFT],
4356 					    val, size, max);
4357 	    if (gui.which_scrollbars[SBAR_RIGHT]
4358 		    && (gui.dragged_sb != SBAR_RIGHT || gui.dragged_wp != wp))
4359 		gui_mch_set_scrollbar_thumb(&wp->w_scrollbars[SBAR_RIGHT],
4360 					    val, size, max);
4361 	}
4362     }
4363     prev_curwin = curwin;
4364     --hold_gui_events;
4365 }
4366 
4367 /*
4368  * Enable or disable a scrollbar.
4369  * Check for scrollbars for vertically split windows which are not enabled
4370  * sometimes.
4371  */
4372     static void
4373 gui_do_scrollbar(
4374     win_T	*wp,
4375     int		which,	    /* SBAR_LEFT or SBAR_RIGHT */
4376     int		enable)	    /* TRUE to enable scrollbar */
4377 {
4378     int		midcol = curwin->w_wincol + curwin->w_width / 2;
4379     int		has_midcol = (wp->w_wincol <= midcol
4380 				     && wp->w_wincol + wp->w_width >= midcol);
4381 
4382     /* Only enable scrollbars that contain the middle column of the current
4383      * window. */
4384     if (gui.which_scrollbars[SBAR_RIGHT] != gui.which_scrollbars[SBAR_LEFT])
4385     {
4386 	/* Scrollbars only on one side.  Don't enable scrollbars that don't
4387 	 * contain the middle column of the current window. */
4388 	if (!has_midcol)
4389 	    enable = FALSE;
4390     }
4391     else
4392     {
4393 	/* Scrollbars on both sides.  Don't enable scrollbars that neither
4394 	 * contain the middle column of the current window nor are on the far
4395 	 * side. */
4396 	if (midcol > Columns / 2)
4397 	{
4398 	    if (which == SBAR_LEFT ? wp->w_wincol != 0 : !has_midcol)
4399 		enable = FALSE;
4400 	}
4401 	else
4402 	{
4403 	    if (which == SBAR_RIGHT ? wp->w_wincol + wp->w_width != Columns
4404 								: !has_midcol)
4405 		enable = FALSE;
4406 	}
4407     }
4408     gui_mch_enable_scrollbar(&wp->w_scrollbars[which], enable);
4409 }
4410 
4411 /*
4412  * Scroll a window according to the values set in the globals current_scrollbar
4413  * and scrollbar_value.  Return TRUE if the cursor in the current window moved
4414  * or FALSE otherwise.
4415  */
4416     int
4417 gui_do_scroll(void)
4418 {
4419     win_T	*wp, *save_wp;
4420     int		i;
4421     long	nlines;
4422     pos_T	old_cursor;
4423     linenr_T	old_topline;
4424 #ifdef FEAT_DIFF
4425     int		old_topfill;
4426 #endif
4427 
4428     for (wp = firstwin, i = 0; i < current_scrollbar; wp = W_NEXT(wp), i++)
4429 	if (wp == NULL)
4430 	    break;
4431     if (wp == NULL)
4432 	/* Couldn't find window */
4433 	return FALSE;
4434 
4435     /*
4436      * Compute number of lines to scroll.  If zero, nothing to do.
4437      */
4438     nlines = (long)scrollbar_value + 1 - (long)wp->w_topline;
4439     if (nlines == 0)
4440 	return FALSE;
4441 
4442     save_wp = curwin;
4443     old_topline = wp->w_topline;
4444 #ifdef FEAT_DIFF
4445     old_topfill = wp->w_topfill;
4446 #endif
4447     old_cursor = wp->w_cursor;
4448     curwin = wp;
4449     curbuf = wp->w_buffer;
4450     if (nlines < 0)
4451 	scrolldown(-nlines, gui.dragged_wp == NULL);
4452     else
4453 	scrollup(nlines, gui.dragged_wp == NULL);
4454     /* Reset dragged_wp after using it.  "dragged_sb" will have been reset for
4455      * the mouse-up event already, but we still want it to behave like when
4456      * dragging.  But not the next click in an arrow. */
4457     if (gui.dragged_sb == SBAR_NONE)
4458 	gui.dragged_wp = NULL;
4459 
4460     if (old_topline != wp->w_topline
4461 #ifdef FEAT_DIFF
4462 	    || old_topfill != wp->w_topfill
4463 #endif
4464 	    )
4465     {
4466 	if (p_so != 0)
4467 	{
4468 	    cursor_correct();		/* fix window for 'so' */
4469 	    update_topline();		/* avoid up/down jump */
4470 	}
4471 	if (old_cursor.lnum != wp->w_cursor.lnum)
4472 	    coladvance(wp->w_curswant);
4473 	wp->w_scbind_pos = wp->w_topline;
4474     }
4475 
4476     /* Make sure wp->w_leftcol and wp->w_skipcol are correct. */
4477     validate_cursor();
4478 
4479     curwin = save_wp;
4480     curbuf = save_wp->w_buffer;
4481 
4482     /*
4483      * Don't call updateWindow() when nothing has changed (it will overwrite
4484      * the status line!).
4485      */
4486     if (old_topline != wp->w_topline
4487 	    || wp->w_redr_type != 0
4488 #ifdef FEAT_DIFF
4489 	    || old_topfill != wp->w_topfill
4490 #endif
4491 	    )
4492     {
4493 	int type = VALID;
4494 
4495 #ifdef FEAT_INS_EXPAND
4496 	if (pum_visible())
4497 	{
4498 	    type = NOT_VALID;
4499 	    wp->w_lines_valid = 0;
4500 	}
4501 #endif
4502 	/* Don't set must_redraw here, it may cause the popup menu to
4503 	 * disappear when losing focus after a scrollbar drag. */
4504 	if (wp->w_redr_type < type)
4505 	    wp->w_redr_type = type;
4506 	mch_disable_flush();
4507 	updateWindow(wp);   /* update window, status line, and cmdline */
4508 	mch_enable_flush();
4509     }
4510 
4511 #ifdef FEAT_INS_EXPAND
4512     /* May need to redraw the popup menu. */
4513     if (pum_visible())
4514 	pum_redraw();
4515 #endif
4516 
4517     return (wp == curwin && !EQUAL_POS(curwin->w_cursor, old_cursor));
4518 }
4519 
4520 
4521 /*
4522  * Horizontal scrollbar stuff:
4523  */
4524 
4525 /*
4526  * Return length of line "lnum" for horizontal scrolling.
4527  */
4528     static colnr_T
4529 scroll_line_len(linenr_T lnum)
4530 {
4531     char_u	*p;
4532     colnr_T	col;
4533     int		w;
4534 
4535     p = ml_get(lnum);
4536     col = 0;
4537     if (*p != NUL)
4538 	for (;;)
4539 	{
4540 	    w = chartabsize(p, col);
4541 	    MB_PTR_ADV(p);
4542 	    if (*p == NUL)		/* don't count the last character */
4543 		break;
4544 	    col += w;
4545 	}
4546     return col;
4547 }
4548 
4549 /* Remember which line is currently the longest, so that we don't have to
4550  * search for it when scrolling horizontally. */
4551 static linenr_T longest_lnum = 0;
4552 
4553 /*
4554  * Find longest visible line number.  If this is not possible (or not desired,
4555  * by setting 'h' in "guioptions") then the current line number is returned.
4556  */
4557     static linenr_T
4558 gui_find_longest_lnum(void)
4559 {
4560     linenr_T ret = 0;
4561 
4562     /* Calculate maximum for horizontal scrollbar.  Check for reasonable
4563      * line numbers, topline and botline can be invalid when displaying is
4564      * postponed. */
4565     if (vim_strchr(p_go, GO_HORSCROLL) == NULL
4566 	    && curwin->w_topline <= curwin->w_cursor.lnum
4567 	    && curwin->w_botline > curwin->w_cursor.lnum
4568 	    && curwin->w_botline <= curbuf->b_ml.ml_line_count + 1)
4569     {
4570 	linenr_T    lnum;
4571 	colnr_T	    n;
4572 	long	    max = 0;
4573 
4574 	/* Use maximum of all visible lines.  Remember the lnum of the
4575 	 * longest line, closest to the cursor line.  Used when scrolling
4576 	 * below. */
4577 	for (lnum = curwin->w_topline; lnum < curwin->w_botline; ++lnum)
4578 	{
4579 	    n = scroll_line_len(lnum);
4580 	    if (n > (colnr_T)max)
4581 	    {
4582 		max = n;
4583 		ret = lnum;
4584 	    }
4585 	    else if (n == (colnr_T)max
4586 		    && abs((int)(lnum - curwin->w_cursor.lnum))
4587 		       < abs((int)(ret - curwin->w_cursor.lnum)))
4588 		ret = lnum;
4589 	}
4590     }
4591     else
4592 	/* Use cursor line only. */
4593 	ret = curwin->w_cursor.lnum;
4594 
4595     return ret;
4596 }
4597 
4598     static void
4599 gui_update_horiz_scrollbar(int force)
4600 {
4601     long	value, size, max;	/* need 32 bit ints here */
4602 
4603     if (!gui.which_scrollbars[SBAR_BOTTOM])
4604 	return;
4605 
4606     if (!force && gui.dragged_sb == SBAR_BOTTOM)
4607 	return;
4608 
4609     if (!force && curwin->w_p_wrap && gui.prev_wrap)
4610 	return;
4611 
4612     /*
4613      * It is possible for the cursor to be invalid if we're in the middle of
4614      * something (like changing files).  If so, don't do anything for now.
4615      */
4616     if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
4617     {
4618 	gui.bottom_sbar.value = -1;
4619 	return;
4620     }
4621 
4622     size = curwin->w_width;
4623     if (curwin->w_p_wrap)
4624     {
4625 	value = 0;
4626 #ifdef SCROLL_PAST_END
4627 	max = 0;
4628 #else
4629 	max = curwin->w_width - 1;
4630 #endif
4631     }
4632     else
4633     {
4634 	value = curwin->w_leftcol;
4635 
4636 	longest_lnum = gui_find_longest_lnum();
4637 	max = scroll_line_len(longest_lnum);
4638 
4639 #ifdef FEAT_VIRTUALEDIT
4640 	if (virtual_active())
4641 	{
4642 	    /* May move the cursor even further to the right. */
4643 	    if (curwin->w_virtcol >= (colnr_T)max)
4644 		max = curwin->w_virtcol;
4645 	}
4646 #endif
4647 
4648 #ifndef SCROLL_PAST_END
4649 	max += curwin->w_width - 1;
4650 #endif
4651 	/* The line number isn't scrolled, thus there is less space when
4652 	 * 'number' or 'relativenumber' is set (also for 'foldcolumn'). */
4653 	size -= curwin_col_off();
4654 #ifndef SCROLL_PAST_END
4655 	max -= curwin_col_off();
4656 #endif
4657     }
4658 
4659 #ifndef SCROLL_PAST_END
4660     if (value > max - size + 1)
4661 	value = max - size + 1;	    /* limit the value to allowable range */
4662 #endif
4663 
4664 #ifdef FEAT_RIGHTLEFT
4665     if (curwin->w_p_rl)
4666     {
4667 	value = max + 1 - size - value;
4668 	if (value < 0)
4669 	{
4670 	    size += value;
4671 	    value = 0;
4672 	}
4673     }
4674 #endif
4675     if (!force && value == gui.bottom_sbar.value && size == gui.bottom_sbar.size
4676 						&& max == gui.bottom_sbar.max)
4677 	return;
4678 
4679     gui.bottom_sbar.value = value;
4680     gui.bottom_sbar.size = size;
4681     gui.bottom_sbar.max = max;
4682     gui.prev_wrap = curwin->w_p_wrap;
4683 
4684     gui_mch_set_scrollbar_thumb(&gui.bottom_sbar, value, size, max);
4685 }
4686 
4687 /*
4688  * Do a horizontal scroll.  Return TRUE if the cursor moved, FALSE otherwise.
4689  */
4690     int
4691 gui_do_horiz_scroll(long_u leftcol, int compute_longest_lnum)
4692 {
4693     /* no wrapping, no scrolling */
4694     if (curwin->w_p_wrap)
4695 	return FALSE;
4696 
4697     if (curwin->w_leftcol == (colnr_T)leftcol)
4698 	return FALSE;
4699 
4700     curwin->w_leftcol = (colnr_T)leftcol;
4701 
4702     /* When the line of the cursor is too short, move the cursor to the
4703      * longest visible line. */
4704     if (vim_strchr(p_go, GO_HORSCROLL) == NULL
4705 	    && !virtual_active()
4706 	    && (colnr_T)leftcol > scroll_line_len(curwin->w_cursor.lnum))
4707     {
4708 	if (compute_longest_lnum)
4709 	{
4710 	    curwin->w_cursor.lnum = gui_find_longest_lnum();
4711 	    curwin->w_cursor.col = 0;
4712 	}
4713 	/* Do a sanity check on "longest_lnum", just in case. */
4714 	else if (longest_lnum >= curwin->w_topline
4715 		&& longest_lnum < curwin->w_botline)
4716 	{
4717 	    curwin->w_cursor.lnum = longest_lnum;
4718 	    curwin->w_cursor.col = 0;
4719 	}
4720     }
4721 
4722     return leftcol_changed();
4723 }
4724 
4725 /*
4726  * Check that none of the colors are the same as the background color
4727  */
4728     void
4729 gui_check_colors(void)
4730 {
4731     if (gui.norm_pixel == gui.back_pixel || gui.norm_pixel == INVALCOLOR)
4732     {
4733 	gui_set_bg_color((char_u *)"White");
4734 	if (gui.norm_pixel == gui.back_pixel || gui.norm_pixel == INVALCOLOR)
4735 	    gui_set_fg_color((char_u *)"Black");
4736     }
4737 }
4738 
4739     static void
4740 gui_set_fg_color(char_u *name)
4741 {
4742     gui.norm_pixel = gui_get_color(name);
4743     hl_set_fg_color_name(vim_strsave(name));
4744 }
4745 
4746     static void
4747 gui_set_bg_color(char_u *name)
4748 {
4749     gui.back_pixel = gui_get_color(name);
4750     hl_set_bg_color_name(vim_strsave(name));
4751 }
4752 
4753 /*
4754  * Allocate a color by name.
4755  * Returns INVALCOLOR and gives an error message when failed.
4756  */
4757     guicolor_T
4758 gui_get_color(char_u *name)
4759 {
4760     guicolor_T	t;
4761 
4762     if (*name == NUL)
4763 	return INVALCOLOR;
4764     t = gui_mch_get_color(name);
4765 
4766     if (t == INVALCOLOR
4767 #if defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK)
4768 	    && gui.in_use
4769 #endif
4770 	    )
4771 	EMSG2(_("E254: Cannot allocate color %s"), name);
4772     return t;
4773 }
4774 
4775 /*
4776  * Return the grey value of a color (range 0-255).
4777  */
4778     int
4779 gui_get_lightness(guicolor_T pixel)
4780 {
4781     long_u	rgb = (long_u)gui_mch_get_rgb(pixel);
4782 
4783     return  (int)(  (((rgb >> 16) & 0xff) * 299)
4784 		   + (((rgb >> 8) & 0xff) * 587)
4785 		   +  ((rgb	  & 0xff) * 114)) / 1000;
4786 }
4787 
4788 #if defined(FEAT_GUI_X11) || defined(PROTO)
4789     void
4790 gui_new_scrollbar_colors(void)
4791 {
4792     win_T	*wp;
4793 
4794     /* Nothing to do if GUI hasn't started yet. */
4795     if (!gui.in_use)
4796 	return;
4797 
4798     FOR_ALL_WINDOWS(wp)
4799     {
4800 	gui_mch_set_scrollbar_colors(&(wp->w_scrollbars[SBAR_LEFT]));
4801 	gui_mch_set_scrollbar_colors(&(wp->w_scrollbars[SBAR_RIGHT]));
4802     }
4803     gui_mch_set_scrollbar_colors(&gui.bottom_sbar);
4804 }
4805 #endif
4806 
4807 /*
4808  * Call this when focus has changed.
4809  */
4810     void
4811 gui_focus_change(int in_focus)
4812 {
4813 /*
4814  * Skip this code to avoid drawing the cursor when debugging and switching
4815  * between the debugger window and gvim.
4816  */
4817 #if 1
4818     gui.in_focus = in_focus;
4819     out_flush_cursor(TRUE, FALSE);
4820 
4821 # ifdef FEAT_XIM
4822     xim_set_focus(in_focus);
4823 # endif
4824 
4825     /* Put events in the input queue only when allowed.
4826      * ui_focus_change() isn't called directly, because it invokes
4827      * autocommands and that must not happen asynchronously. */
4828     if (!hold_gui_events)
4829     {
4830 	char_u  bytes[3];
4831 
4832 	bytes[0] = CSI;
4833 	bytes[1] = KS_EXTRA;
4834 	bytes[2] = in_focus ? (int)KE_FOCUSGAINED : (int)KE_FOCUSLOST;
4835 	add_to_input_buf(bytes, 3);
4836     }
4837 #endif
4838 }
4839 
4840 /*
4841  * Called when the mouse moved (but not when dragging).
4842  */
4843     void
4844 gui_mouse_moved(int x, int y)
4845 {
4846     win_T	*wp;
4847     char_u	st[8];
4848 
4849     /* Ignore this while still starting up. */
4850     if (!gui.in_use || gui.starting)
4851 	return;
4852 
4853 #ifdef FEAT_MOUSESHAPE
4854     /* Get window pointer, and update mouse shape as well. */
4855     wp = xy2win(x, y);
4856 #endif
4857 
4858     /* Only handle this when 'mousefocus' set and ... */
4859     if (p_mousef
4860 	    && !hold_gui_events		/* not holding events */
4861 	    && (State & (NORMAL|INSERT))/* Normal/Visual/Insert mode */
4862 	    && State != HITRETURN	/* but not hit-return prompt */
4863 	    && msg_scrolled == 0	/* no scrolled message */
4864 	    && !need_mouse_correct	/* not moving the pointer */
4865 	    && gui.in_focus)		/* gvim in focus */
4866     {
4867 	/* Don't move the mouse when it's left or right of the Vim window */
4868 	if (x < 0 || x > Columns * gui.char_width)
4869 	    return;
4870 #ifndef FEAT_MOUSESHAPE
4871 	wp = xy2win(x, y);
4872 #endif
4873 	if (wp == curwin || wp == NULL)
4874 	    return;	/* still in the same old window, or none at all */
4875 
4876 	/* Ignore position in the tab pages line. */
4877 	if (Y_2_ROW(y) < tabline_height())
4878 	    return;
4879 
4880 	/*
4881 	 * format a mouse click on status line input
4882 	 * ala gui_send_mouse_event(0, x, y, 0, 0);
4883 	 * Trick: Use a column number -1, so that get_pseudo_mouse_code() will
4884 	 * generate a K_LEFTMOUSE_NM key code.
4885 	 */
4886 	if (finish_op)
4887 	{
4888 	    /* abort the current operator first */
4889 	    st[0] = ESC;
4890 	    add_to_input_buf(st, 1);
4891 	}
4892 	st[0] = CSI;
4893 	st[1] = KS_MOUSE;
4894 	st[2] = KE_FILLER;
4895 	st[3] = (char_u)MOUSE_LEFT;
4896 	fill_mouse_coord(st + 4,
4897 		wp->w_wincol == 0 ? -1 : wp->w_wincol + MOUSE_COLOFF,
4898 		wp->w_height + W_WINROW(wp));
4899 
4900 	add_to_input_buf(st, 8);
4901 	st[3] = (char_u)MOUSE_RELEASE;
4902 	add_to_input_buf(st, 8);
4903 #ifdef FEAT_GUI_GTK
4904 	/* Need to wake up the main loop */
4905 	if (gtk_main_level() > 0)
4906 	    gtk_main_quit();
4907 #endif
4908     }
4909 }
4910 
4911 /*
4912  * Called when mouse should be moved to window with focus.
4913  */
4914     void
4915 gui_mouse_correct(void)
4916 {
4917     int		x, y;
4918     win_T	*wp = NULL;
4919 
4920     need_mouse_correct = FALSE;
4921 
4922     if (!(gui.in_use && p_mousef))
4923 	return;
4924 
4925     gui_mch_getmouse(&x, &y);
4926     /* Don't move the mouse when it's left or right of the Vim window */
4927     if (x < 0 || x > Columns * gui.char_width)
4928 	return;
4929     if (y >= 0 && Y_2_ROW(y) >= tabline_height())
4930 	wp = xy2win(x, y);
4931     if (wp != curwin && wp != NULL)	/* If in other than current window */
4932     {
4933 	validate_cline_row();
4934 	gui_mch_setmouse((int)W_ENDCOL(curwin) * gui.char_width - 3,
4935 		(W_WINROW(curwin) + curwin->w_wrow) * gui.char_height
4936 						     + (gui.char_height) / 2);
4937     }
4938 }
4939 
4940 /*
4941  * Find window where the mouse pointer "x" / "y" coordinate is in.
4942  */
4943     static win_T *
4944 xy2win(int x UNUSED, int y UNUSED)
4945 {
4946     int		row;
4947     int		col;
4948     win_T	*wp;
4949 
4950     row = Y_2_ROW(y);
4951     col = X_2_COL(x);
4952     if (row < 0 || col < 0)		/* before first window */
4953 	return NULL;
4954     wp = mouse_find_win(&row, &col);
4955     if (wp == NULL)
4956 	return NULL;
4957 #ifdef FEAT_MOUSESHAPE
4958     if (State == HITRETURN || State == ASKMORE)
4959     {
4960 	if (Y_2_ROW(y) >= msg_row)
4961 	    update_mouseshape(SHAPE_IDX_MOREL);
4962 	else
4963 	    update_mouseshape(SHAPE_IDX_MORE);
4964     }
4965     else if (row > wp->w_height)	/* below status line */
4966 	update_mouseshape(SHAPE_IDX_CLINE);
4967     else if (!(State & CMDLINE) && wp->w_vsep_width > 0 && col == wp->w_width
4968 	    && (row != wp->w_height || !stl_connected(wp)) && msg_scrolled == 0)
4969 	update_mouseshape(SHAPE_IDX_VSEP);
4970     else if (!(State & CMDLINE) && wp->w_status_height > 0
4971 				  && row == wp->w_height && msg_scrolled == 0)
4972 	update_mouseshape(SHAPE_IDX_STATUS);
4973     else
4974 	update_mouseshape(-2);
4975 #endif
4976     return wp;
4977 }
4978 
4979 /*
4980  * ":gui" and ":gvim": Change from the terminal version to the GUI version.
4981  * File names may be given to redefine the args list.
4982  */
4983     void
4984 ex_gui(exarg_T *eap)
4985 {
4986     char_u	*arg = eap->arg;
4987 
4988     /*
4989      * Check for "-f" argument: foreground, don't fork.
4990      * Also don't fork when started with "gvim -f".
4991      * Do fork when using "gui -b".
4992      */
4993     if (arg[0] == '-'
4994 	    && (arg[1] == 'f' || arg[1] == 'b')
4995 	    && (arg[2] == NUL || VIM_ISWHITE(arg[2])))
4996     {
4997 	gui.dofork = (arg[1] == 'b');
4998 	eap->arg = skipwhite(eap->arg + 2);
4999     }
5000     if (!gui.in_use)
5001     {
5002 	/* Clear the command.  Needed for when forking+exiting, to avoid part
5003 	 * of the argument ending up after the shell prompt. */
5004 	msg_clr_eos_force();
5005 	gui_start();
5006 #ifdef FEAT_JOB_CHANNEL
5007 	channel_gui_register_all();
5008 #endif
5009     }
5010     if (!ends_excmd(*eap->arg))
5011 	ex_next(eap);
5012 }
5013 
5014 #if ((defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK) || defined(FEAT_GUI_W32) \
5015 	|| defined(FEAT_GUI_PHOTON)) && defined(FEAT_TOOLBAR)) || defined(PROTO)
5016 /*
5017  * This is shared between Athena, Motif and GTK.
5018  */
5019 static void gfp_setname(char_u *fname, void *cookie);
5020 
5021 /*
5022  * Callback function for do_in_runtimepath().
5023  */
5024     static void
5025 gfp_setname(char_u *fname, void *cookie)
5026 {
5027     char_u	*gfp_buffer = cookie;
5028 
5029     if (STRLEN(fname) >= MAXPATHL)
5030 	*gfp_buffer = NUL;
5031     else
5032 	STRCPY(gfp_buffer, fname);
5033 }
5034 
5035 /*
5036  * Find the path of bitmap "name" with extension "ext" in 'runtimepath'.
5037  * Return FAIL for failure and OK if buffer[MAXPATHL] contains the result.
5038  */
5039     int
5040 gui_find_bitmap(char_u *name, char_u *buffer, char *ext)
5041 {
5042     if (STRLEN(name) > MAXPATHL - 14)
5043 	return FAIL;
5044     vim_snprintf((char *)buffer, MAXPATHL, "bitmaps/%s.%s", name, ext);
5045     if (do_in_runtimepath(buffer, 0, gfp_setname, buffer) == FAIL
5046 							    || *buffer == NUL)
5047 	return FAIL;
5048     return OK;
5049 }
5050 
5051 # if !defined(FEAT_GUI_GTK) || defined(PROTO)
5052 /*
5053  * Given the name of the "icon=" argument, try finding the bitmap file for the
5054  * icon.  If it is an absolute path name, use it as it is.  Otherwise append
5055  * "ext" and search for it in 'runtimepath'.
5056  * The result is put in "buffer[MAXPATHL]".  If something fails "buffer"
5057  * contains "name".
5058  */
5059     void
5060 gui_find_iconfile(char_u *name, char_u *buffer, char *ext)
5061 {
5062     char_u	buf[MAXPATHL + 1];
5063 
5064     expand_env(name, buffer, MAXPATHL);
5065     if (!mch_isFullName(buffer) && gui_find_bitmap(buffer, buf, ext) == OK)
5066 	STRCPY(buffer, buf);
5067 }
5068 # endif
5069 #endif
5070 
5071 #if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11) || defined(PROTO)
5072     void
5073 display_errors(void)
5074 {
5075     char_u	*p;
5076 
5077     if (isatty(2))
5078 	fflush(stderr);
5079     else if (error_ga.ga_data != NULL)
5080     {
5081 	/* avoid putting up a message box with blanks only */
5082 	for (p = (char_u *)error_ga.ga_data; *p != NUL; ++p)
5083 	    if (!isspace(*p))
5084 	    {
5085 		/* Truncate a very long message, it will go off-screen. */
5086 		if (STRLEN(p) > 2000)
5087 		    STRCPY(p + 2000 - 14, "...(truncated)");
5088 		(void)do_dialog(VIM_ERROR, (char_u *)_("Error"),
5089 				       p, (char_u *)_("&Ok"), 1, NULL, FALSE);
5090 		break;
5091 	    }
5092 	ga_clear(&error_ga);
5093     }
5094 }
5095 #endif
5096 
5097 #if defined(NO_CONSOLE_INPUT) || defined(PROTO)
5098 /*
5099  * Return TRUE if still starting up and there is no place to enter text.
5100  * For GTK and X11 we check if stderr is not a tty, which means we were
5101  * (probably) started from the desktop.  Also check stdin, "vim >& file" does
5102  * allow typing on stdin.
5103  */
5104     int
5105 no_console_input(void)
5106 {
5107     return ((!gui.in_use || gui.starting)
5108 # ifndef NO_CONSOLE
5109 	    && !isatty(0) && !isatty(2)
5110 # endif
5111 	    );
5112 }
5113 #endif
5114 
5115 #if defined(FIND_REPLACE_DIALOG) || defined(FEAT_SUN_WORKSHOP) \
5116 	|| defined(NEED_GUI_UPDATE_SCREEN) \
5117 	|| defined(PROTO)
5118 /*
5119  * Update the current window and the screen.
5120  */
5121     void
5122 gui_update_screen(void)
5123 {
5124 # ifdef FEAT_CONCEAL
5125     linenr_T	conceal_old_cursor_line = 0;
5126     linenr_T	conceal_new_cursor_line = 0;
5127     int		conceal_update_lines = FALSE;
5128 # endif
5129 
5130     update_topline();
5131     validate_cursor();
5132 
5133     /* Trigger CursorMoved if the cursor moved. */
5134     if (!finish_op && (has_cursormoved()
5135 # ifdef FEAT_CONCEAL
5136 		|| curwin->w_p_cole > 0
5137 # endif
5138 		) && !EQUAL_POS(last_cursormoved, curwin->w_cursor))
5139     {
5140 	if (has_cursormoved())
5141 	    apply_autocmds(EVENT_CURSORMOVED, NULL, NULL, FALSE, curbuf);
5142 # ifdef FEAT_CONCEAL
5143 	if (curwin->w_p_cole > 0)
5144 	{
5145 	    conceal_old_cursor_line = last_cursormoved.lnum;
5146 	    conceal_new_cursor_line = curwin->w_cursor.lnum;
5147 	    conceal_update_lines = TRUE;
5148 	}
5149 # endif
5150 	last_cursormoved = curwin->w_cursor;
5151     }
5152 
5153     update_screen(0);	/* may need to update the screen */
5154     setcursor();
5155 # ifdef FEAT_CONCEAL
5156     if (conceal_update_lines
5157 	    && (conceal_old_cursor_line != conceal_new_cursor_line
5158 		|| conceal_cursor_line(curwin)
5159 		|| need_cursor_line_redraw))
5160     {
5161 	if (conceal_old_cursor_line != conceal_new_cursor_line)
5162 	    update_single_line(curwin, conceal_old_cursor_line);
5163 	update_single_line(curwin, conceal_new_cursor_line);
5164 	curwin->w_valid &= ~VALID_CROW;
5165     }
5166 # endif
5167     out_flush_cursor(TRUE, FALSE);
5168 }
5169 #endif
5170 
5171 #if defined(FIND_REPLACE_DIALOG) || defined(PROTO)
5172 static void concat_esc(garray_T *gap, char_u *text, int what);
5173 
5174 /*
5175  * Get the text to use in a find/replace dialog.  Uses the last search pattern
5176  * if the argument is empty.
5177  * Returns an allocated string.
5178  */
5179     char_u *
5180 get_find_dialog_text(
5181     char_u	*arg,
5182     int		*wwordp,	/* return: TRUE if \< \> found */
5183     int		*mcasep)	/* return: TRUE if \C found */
5184 {
5185     char_u	*text;
5186 
5187     if (*arg == NUL)
5188 	text = last_search_pat();
5189     else
5190 	text = arg;
5191     if (text != NULL)
5192     {
5193 	text = vim_strsave(text);
5194 	if (text != NULL)
5195 	{
5196 	    int len = (int)STRLEN(text);
5197 	    int i;
5198 
5199 	    /* Remove "\V" */
5200 	    if (len >= 2 && STRNCMP(text, "\\V", 2) == 0)
5201 	    {
5202 		mch_memmove(text, text + 2, (size_t)(len - 1));
5203 		len -= 2;
5204 	    }
5205 
5206 	    /* Recognize "\c" and "\C" and remove. */
5207 	    if (len >= 2 && *text == '\\' && (text[1] == 'c' || text[1] == 'C'))
5208 	    {
5209 		*mcasep = (text[1] == 'C');
5210 		mch_memmove(text, text + 2, (size_t)(len - 1));
5211 		len -= 2;
5212 	    }
5213 
5214 	    /* Recognize "\<text\>" and remove. */
5215 	    if (len >= 4
5216 		    && STRNCMP(text, "\\<", 2) == 0
5217 		    && STRNCMP(text + len - 2, "\\>", 2) == 0)
5218 	    {
5219 		*wwordp = TRUE;
5220 		mch_memmove(text, text + 2, (size_t)(len - 4));
5221 		text[len - 4] = NUL;
5222 	    }
5223 
5224 	    /* Recognize "\/" or "\?" and remove. */
5225 	    for (i = 0; i + 1 < len; ++i)
5226 		if (text[i] == '\\' && (text[i + 1] == '/'
5227 						       || text[i + 1] == '?'))
5228 		{
5229 		    mch_memmove(text + i, text + i + 1, (size_t)(len - i));
5230 		    --len;
5231 		}
5232 	}
5233     }
5234     return text;
5235 }
5236 
5237 /*
5238  * Concatenate "text" to grow array "gap", escaping "what" with a backslash.
5239  */
5240     static void
5241 concat_esc(garray_T *gap, char_u *text, int what)
5242 {
5243     while (*text != NUL)
5244     {
5245 #ifdef FEAT_MBYTE
5246 	int l = (*mb_ptr2len)(text);
5247 
5248 	if (l > 1)
5249 	{
5250 	    while (--l >= 0)
5251 		ga_append(gap, *text++);
5252 	    continue;
5253 	}
5254 #endif
5255 	if (*text == what)
5256 	    ga_append(gap, '\\');
5257 	ga_append(gap, *text);
5258 	++text;
5259     }
5260 }
5261 
5262 /*
5263  * Handle the press of a button in the find-replace dialog.
5264  * Return TRUE when something was added to the input buffer.
5265  */
5266     int
5267 gui_do_findrepl(
5268     int		flags,		/* one of FRD_REPLACE, FRD_FINDNEXT, etc. */
5269     char_u	*find_text,
5270     char_u	*repl_text,
5271     int		down)		/* Search downwards. */
5272 {
5273     garray_T	ga;
5274     int		i;
5275     int		type = (flags & FRD_TYPE_MASK);
5276     char_u	*p;
5277     regmatch_T	regmatch;
5278     int		save_did_emsg = did_emsg;
5279     static int  busy = FALSE;
5280 
5281     /* When the screen is being updated we should not change buffers and
5282      * windows structures, it may cause freed memory to be used.  Also don't
5283      * do this recursively (pressing "Find" quickly several times. */
5284     if (updating_screen || busy)
5285 	return FALSE;
5286 
5287     /* refuse replace when text cannot be changed */
5288     if ((type == FRD_REPLACE || type == FRD_REPLACEALL) && text_locked())
5289 	return FALSE;
5290 
5291     busy = TRUE;
5292 
5293     ga_init2(&ga, 1, 100);
5294     if (type == FRD_REPLACEALL)
5295 	ga_concat(&ga, (char_u *)"%s/");
5296 
5297     ga_concat(&ga, (char_u *)"\\V");
5298     if (flags & FRD_MATCH_CASE)
5299 	ga_concat(&ga, (char_u *)"\\C");
5300     else
5301 	ga_concat(&ga, (char_u *)"\\c");
5302     if (flags & FRD_WHOLE_WORD)
5303 	ga_concat(&ga, (char_u *)"\\<");
5304     if (type == FRD_REPLACEALL || down)
5305 	concat_esc(&ga, find_text, '/');	/* escape slashes */
5306     else
5307 	concat_esc(&ga, find_text, '?');	/* escape '?' */
5308     if (flags & FRD_WHOLE_WORD)
5309 	ga_concat(&ga, (char_u *)"\\>");
5310 
5311     if (type == FRD_REPLACEALL)
5312     {
5313 	ga_concat(&ga, (char_u *)"/");
5314 						/* escape / and \ */
5315 	p = vim_strsave_escaped(repl_text, (char_u *)"/\\");
5316 	if (p != NULL)
5317 	    ga_concat(&ga, p);
5318 	vim_free(p);
5319 	ga_concat(&ga, (char_u *)"/g");
5320     }
5321     ga_append(&ga, NUL);
5322 
5323     if (type == FRD_REPLACE)
5324     {
5325 	/* Do the replacement when the text at the cursor matches.  Thus no
5326 	 * replacement is done if the cursor was moved! */
5327 	regmatch.regprog = vim_regcomp(ga.ga_data, RE_MAGIC + RE_STRING);
5328 	regmatch.rm_ic = 0;
5329 	if (regmatch.regprog != NULL)
5330 	{
5331 	    p = ml_get_cursor();
5332 	    if (vim_regexec_nl(&regmatch, p, (colnr_T)0)
5333 						   && regmatch.startp[0] == p)
5334 	    {
5335 		/* Clear the command line to remove any old "No match"
5336 		 * error. */
5337 		msg_end_prompt();
5338 
5339 		if (u_save_cursor() == OK)
5340 		{
5341 		    /* A button was pressed thus undo should be synced. */
5342 		    u_sync(FALSE);
5343 
5344 		    del_bytes((long)(regmatch.endp[0] - regmatch.startp[0]),
5345 								FALSE, FALSE);
5346 		    ins_str(repl_text);
5347 		}
5348 	    }
5349 	    else
5350 		MSG(_("No match at cursor, finding next"));
5351 	    vim_regfree(regmatch.regprog);
5352 	}
5353     }
5354 
5355     if (type == FRD_REPLACEALL)
5356     {
5357 	/* A button was pressed, thus undo should be synced. */
5358 	u_sync(FALSE);
5359 	do_cmdline_cmd(ga.ga_data);
5360     }
5361     else
5362     {
5363 	int searchflags = SEARCH_MSG + SEARCH_MARK;
5364 
5365 	/* Search for the next match.
5366 	 * Don't skip text under cursor for single replace. */
5367 	if (type == FRD_REPLACE)
5368 	    searchflags += SEARCH_START;
5369 	i = msg_scroll;
5370 	(void)do_search(NULL, down ? '/' : '?', ga.ga_data, 1L,
5371 						      searchflags, NULL, NULL);
5372 	msg_scroll = i;	    /* don't let an error message set msg_scroll */
5373     }
5374 
5375     /* Don't want to pass did_emsg to other code, it may cause disabling
5376      * syntax HL if we were busy redrawing. */
5377     did_emsg = save_did_emsg;
5378 
5379     if (State & (NORMAL | INSERT))
5380     {
5381 	gui_update_screen();		/* update the screen */
5382 	msg_didout = 0;			/* overwrite any message */
5383 	need_wait_return = FALSE;	/* don't wait for return */
5384     }
5385 
5386     vim_free(ga.ga_data);
5387     busy = FALSE;
5388     return (ga.ga_len > 0);
5389 }
5390 
5391 #endif
5392 
5393 #if (defined(FEAT_DND) && defined(FEAT_GUI_GTK)) \
5394 	|| defined(FEAT_GUI_MSWIN) \
5395 	|| defined(FEAT_GUI_MAC) \
5396 	|| defined(PROTO)
5397 
5398 static void gui_wingoto_xy(int x, int y);
5399 
5400 /*
5401  * Jump to the window at specified point (x, y).
5402  */
5403     static void
5404 gui_wingoto_xy(int x, int y)
5405 {
5406     int		row = Y_2_ROW(y);
5407     int		col = X_2_COL(x);
5408     win_T	*wp;
5409 
5410     if (row >= 0 && col >= 0)
5411     {
5412 	wp = mouse_find_win(&row, &col);
5413 	if (wp != NULL && wp != curwin)
5414 	    win_goto(wp);
5415     }
5416 }
5417 
5418 /*
5419  * Process file drop.  Mouse cursor position, key modifiers, name of files
5420  * and count of files are given.  Argument "fnames[count]" has full pathnames
5421  * of dropped files, they will be freed in this function, and caller can't use
5422  * fnames after call this function.
5423  */
5424     void
5425 gui_handle_drop(
5426     int		x UNUSED,
5427     int		y UNUSED,
5428     int_u	modifiers,
5429     char_u	**fnames,
5430     int		count)
5431 {
5432     int		i;
5433     char_u	*p;
5434     static int	entered = FALSE;
5435 
5436     /*
5437      * This function is called by event handlers.  Just in case we get a
5438      * second event before the first one is handled, ignore the second one.
5439      * Not sure if this can ever happen, just in case.
5440      */
5441     if (entered)
5442 	return;
5443     entered = TRUE;
5444 
5445     /*
5446      * When the cursor is at the command line, add the file names to the
5447      * command line, don't edit the files.
5448      */
5449     if (State & CMDLINE)
5450     {
5451 	shorten_filenames(fnames, count);
5452 	for (i = 0; i < count; ++i)
5453 	{
5454 	    if (fnames[i] != NULL)
5455 	    {
5456 		if (i > 0)
5457 		    add_to_input_buf((char_u*)" ", 1);
5458 
5459 		/* We don't know what command is used thus we can't be sure
5460 		 * about which characters need to be escaped.  Only escape the
5461 		 * most common ones. */
5462 # ifdef BACKSLASH_IN_FILENAME
5463 		p = vim_strsave_escaped(fnames[i], (char_u *)" \t\"|");
5464 # else
5465 		p = vim_strsave_escaped(fnames[i], (char_u *)"\\ \t\"|");
5466 # endif
5467 		if (p != NULL)
5468 		    add_to_input_buf_csi(p, (int)STRLEN(p));
5469 		vim_free(p);
5470 		vim_free(fnames[i]);
5471 	    }
5472 	}
5473 	vim_free(fnames);
5474     }
5475     else
5476     {
5477 	/* Go to the window under mouse cursor, then shorten given "fnames" by
5478 	 * current window, because a window can have local current dir. */
5479 	gui_wingoto_xy(x, y);
5480 	shorten_filenames(fnames, count);
5481 
5482 	/* If Shift held down, remember the first item. */
5483 	if ((modifiers & MOUSE_SHIFT) != 0)
5484 	    p = vim_strsave(fnames[0]);
5485 	else
5486 	    p = NULL;
5487 
5488 	/* Handle the drop, :edit or :split to get to the file.  This also
5489 	 * frees fnames[].  Skip this if there is only one item it's a
5490 	 * directory and Shift is held down. */
5491 	if (count == 1 && (modifiers & MOUSE_SHIFT) != 0
5492 						     && mch_isdir(fnames[0]))
5493 	{
5494 	    vim_free(fnames[0]);
5495 	    vim_free(fnames);
5496 	}
5497 	else
5498 	    handle_drop(count, fnames, (modifiers & MOUSE_CTRL) != 0);
5499 
5500 	/* If Shift held down, change to first file's directory.  If the first
5501 	 * item is a directory, change to that directory (and let the explorer
5502 	 * plugin show the contents). */
5503 	if (p != NULL)
5504 	{
5505 	    if (mch_isdir(p))
5506 	    {
5507 		if (mch_chdir((char *)p) == 0)
5508 		    shorten_fnames(TRUE);
5509 	    }
5510 	    else if (vim_chdirfile(p, "drop") == OK)
5511 		shorten_fnames(TRUE);
5512 	    vim_free(p);
5513 	}
5514 
5515 	/* Update the screen display */
5516 	update_screen(NOT_VALID);
5517 # ifdef FEAT_MENU
5518 	gui_update_menus(0);
5519 # endif
5520 #ifdef FEAT_TITLE
5521 	maketitle();
5522 #endif
5523 	setcursor();
5524 	out_flush_cursor(FALSE, FALSE);
5525     }
5526 
5527     entered = FALSE;
5528 }
5529 #endif
5530