xref: /vim-8.2.3635/src/gui.c (revision f0b03c4e)
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 
59 /*
60  * The Athena scrollbars can move the thumb to after the end of the scrollbar,
61  * this makes the thumb indicate the part of the text that is shown.  Motif
62  * can't do this.
63  */
64 #if defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_MAC)
65 # define SCROLL_PAST_END
66 #endif
67 
68 /*
69  * gui_start -- Called when user wants to start the GUI.
70  *
71  * Careful: This function can be called recursively when there is a ":gui"
72  * command in the .gvimrc file.  Only the first call should fork, not the
73  * recursive call.
74  */
75     void
76 gui_start(void)
77 {
78     char_u	*old_term;
79     static int	recursive = 0;
80 
81     old_term = vim_strsave(T_NAME);
82 
83     settmode(TMODE_COOK);		/* stop RAW mode */
84     if (full_screen)
85 	cursor_on();			/* needed for ":gui" in .vimrc */
86     full_screen = FALSE;
87 
88     ++recursive;
89 
90 #ifdef MAY_FORK
91     /*
92      * Quit the current process and continue in the child.
93      * Makes "gvim file" disconnect from the shell it was started in.
94      * Don't do this when Vim was started with "-f" or the 'f' flag is present
95      * in 'guioptions'.
96      */
97     if (gui.dofork && !vim_strchr(p_go, GO_FORG) && recursive <= 1)
98     {
99 	gui_do_fork();
100     }
101     else
102 #endif
103     {
104 #ifdef FEAT_GUI_GTK
105 	/* If there is 'f' in 'guioptions' and specify -g argument,
106 	 * gui_mch_init_check() was not called yet.  */
107 	if (gui_mch_init_check() != OK)
108 	    getout_preserve_modified(1);
109 #endif
110 	gui_attempt_start();
111     }
112 
113     if (!gui.in_use)			/* failed to start GUI */
114     {
115 	/* Back to old term settings
116 	 *
117 	 * FIXME: If we got here because a child process failed and flagged to
118 	 * the parent to resume, and X11 is enabled with FEAT_TITLE, this will
119 	 * hit an X11 I/O error and do a longjmp(), leaving recursive
120 	 * permanently set to 1. This is probably not as big a problem as it
121 	 * sounds, because gui_mch_init() in both gui_x11.c and gui_gtk_x11.c
122 	 * return "OK" unconditionally, so it would be very difficult to
123 	 * actually hit this case.
124 	 */
125 	termcapinit(old_term);
126 	settmode(TMODE_RAW);		/* restart RAW mode */
127 #ifdef FEAT_TITLE
128 	set_title_defaults();		/* set 'title' and 'icon' again */
129 #endif
130     }
131 
132     vim_free(old_term);
133 
134 #ifdef FEAT_AUTOCMD
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 #endif
141     --recursive;
142 }
143 
144 /*
145  * Set_termname() will call gui_init() to start the GUI.
146  * Set the "starting" flag, to indicate that the GUI will start.
147  *
148  * We don't want to open the GUI shell until after we've read .gvimrc,
149  * otherwise we don't know what font we will use, and hence we don't know
150  * what size the shell should be.  So if there are errors in the .gvimrc
151  * file, they will have to go to the terminal: Set full_screen to FALSE.
152  * full_screen will be set to TRUE again by a successful termcapinit().
153  */
154     static void
155 gui_attempt_start(void)
156 {
157     static int recursive = 0;
158 
159     ++recursive;
160     gui.starting = TRUE;
161 
162 #ifdef FEAT_GUI_GTK
163     gui.event_time = GDK_CURRENT_TIME;
164 #endif
165 
166     termcapinit((char_u *)"builtin_gui");
167     gui.starting = recursive - 1;
168 
169 #if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11)
170     if (gui.in_use)
171     {
172 # ifdef FEAT_EVAL
173 	Window	x11_window;
174 	Display	*x11_display;
175 
176 	if (gui_get_x11_windis(&x11_window, &x11_display) == OK)
177 	    set_vim_var_nr(VV_WINDOWID, (long)x11_window);
178 # endif
179 
180 	/* Display error messages in a dialog now. */
181 	display_errors();
182     }
183 #endif
184     --recursive;
185 }
186 
187 #ifdef MAY_FORK
188 
189 /* for waitpid() */
190 # if defined(HAVE_SYS_WAIT_H) || defined(HAVE_UNION_WAIT)
191 #  include <sys/wait.h>
192 # endif
193 
194 /*
195  * Create a new process, by forking. In the child, start the GUI, and in
196  * the parent, exit.
197  *
198  * If something goes wrong, this will return with gui.in_use still set
199  * to FALSE, in which case the caller should continue execution without
200  * the GUI.
201  *
202  * If the child fails to start the GUI, then the child will exit and the
203  * parent will return. If the child succeeds, then the parent will exit
204  * and the child will return.
205  */
206     static void
207 gui_do_fork(void)
208 {
209     int		pipefd[2];	/* pipe between parent and child */
210     int		pipe_error;
211     int		status;
212     int		exit_status;
213     pid_t	pid = -1;
214 
215     /* Setup a pipe between the child and the parent, so that the parent
216      * knows when the child has done the setsid() call and is allowed to
217      * exit. */
218     pipe_error = (pipe(pipefd) < 0);
219     pid = fork();
220     if (pid < 0)	    /* Fork error */
221     {
222 	EMSG(_("E851: Failed to create a new process for the GUI"));
223 	return;
224     }
225     else if (pid > 0)	    /* Parent */
226     {
227 	/* Give the child some time to do the setsid(), otherwise the
228 	 * exit() may kill the child too (when starting gvim from inside a
229 	 * gvim). */
230 	if (!pipe_error)
231 	{
232 	    /* The read returns when the child closes the pipe (or when
233 	     * the child dies for some reason). */
234 	    close(pipefd[1]);
235 	    status = gui_read_child_pipe(pipefd[0]);
236 	    if (status == GUI_CHILD_FAILED)
237 	    {
238 		/* The child failed to start the GUI, so the caller must
239 		 * continue. There may be more error information written
240 		 * to stderr by the child. */
241 # ifdef __NeXT__
242 		wait4(pid, &exit_status, 0, (struct rusage *)0);
243 # else
244 		waitpid(pid, &exit_status, 0);
245 # endif
246 		EMSG(_("E852: The child process failed to start the GUI"));
247 		return;
248 	    }
249 	    else if (status == GUI_CHILD_IO_ERROR)
250 	    {
251 		pipe_error = TRUE;
252 	    }
253 	    /* else GUI_CHILD_OK: parent exit */
254 	}
255 
256 	if (pipe_error)
257 	    ui_delay(300L, TRUE);
258 
259 	/* When swapping screens we may need to go to the next line, e.g.,
260 	 * after a hit-enter prompt and using ":gui". */
261 	if (newline_on_exit)
262 	    mch_errmsg("\r\n");
263 
264 	/*
265 	 * The parent must skip the normal exit() processing, the child
266 	 * will do it.  For example, GTK messes up signals when exiting.
267 	 */
268 	_exit(0);
269     }
270     /* Child */
271 
272 #ifdef FEAT_GUI_GTK
273     /* Call gtk_init_check() here after fork(). See gui_init_check(). */
274     if (gui_mch_init_check() != OK)
275 	getout_preserve_modified(1);
276 #endif
277 
278 # if defined(HAVE_SETSID) || defined(HAVE_SETPGID)
279     /*
280      * Change our process group.  On some systems/shells a CTRL-C in the
281      * shell where Vim was started would otherwise kill gvim!
282      */
283 #  if defined(HAVE_SETSID)
284     (void)setsid();
285 #  else
286     (void)setpgid(0, 0);
287 #  endif
288 # endif
289     if (!pipe_error)
290 	close(pipefd[0]);
291 
292 # if defined(FEAT_GUI_GNOME) && defined(FEAT_SESSION)
293     /* Tell the session manager our new PID */
294     gui_mch_forked();
295 # endif
296 
297     /* Try to start the GUI */
298     gui_attempt_start();
299 
300     /* Notify the parent */
301     if (!pipe_error)
302     {
303 	if (gui.in_use)
304 	    write_eintr(pipefd[1], "ok", 3);
305 	else
306 	    write_eintr(pipefd[1], "fail", 5);
307 	close(pipefd[1]);
308     }
309 
310     /* If we failed to start the GUI, exit now. */
311     if (!gui.in_use)
312 	getout_preserve_modified(1);
313 }
314 
315 /*
316  * Read from a pipe assumed to be connected to the child process (this
317  * function is called from the parent).
318  * Return GUI_CHILD_OK if the child successfully started the GUI,
319  * GUY_CHILD_FAILED if the child failed, or GUI_CHILD_IO_ERROR if there was
320  * some other error.
321  *
322  * The file descriptor will be closed before the function returns.
323  */
324     static int
325 gui_read_child_pipe(int fd)
326 {
327     long	bytes_read;
328 #define READ_BUFFER_SIZE 10
329     char	buffer[READ_BUFFER_SIZE];
330 
331     bytes_read = read_eintr(fd, buffer, READ_BUFFER_SIZE - 1);
332 #undef READ_BUFFER_SIZE
333     close(fd);
334     if (bytes_read < 0)
335 	return GUI_CHILD_IO_ERROR;
336     buffer[bytes_read] = NUL;
337     if (strcmp(buffer, "ok") == 0)
338 	return GUI_CHILD_OK;
339     return GUI_CHILD_FAILED;
340 }
341 
342 #endif /* MAY_FORK */
343 
344 /*
345  * Call this when vim starts up, whether or not the GUI is started
346  */
347     void
348 gui_prepare(int *argc, char **argv)
349 {
350     gui.in_use = FALSE;		    /* No GUI yet (maybe later) */
351     gui.starting = FALSE;	    /* No GUI yet (maybe later) */
352     gui_mch_prepare(argc, argv);
353 }
354 
355 /*
356  * Try initializing the GUI and check if it can be started.
357  * Used from main() to check early if "vim -g" can start the GUI.
358  * Used from gui_init() to prepare for starting the GUI.
359  * Returns FAIL or OK.
360  */
361     int
362 gui_init_check(void)
363 {
364     static int result = MAYBE;
365 
366     if (result != MAYBE)
367     {
368 	if (result == FAIL)
369 	    EMSG(_("E229: Cannot start the GUI"));
370 	return result;
371     }
372 
373     gui.shell_created = FALSE;
374     gui.dying = FALSE;
375     gui.in_focus = TRUE;		/* so the guicursor setting works */
376     gui.dragged_sb = SBAR_NONE;
377     gui.dragged_wp = NULL;
378     gui.pointer_hidden = FALSE;
379     gui.col = 0;
380     gui.row = 0;
381     gui.num_cols = Columns;
382     gui.num_rows = Rows;
383 
384     gui.cursor_is_valid = FALSE;
385     gui.scroll_region_top = 0;
386     gui.scroll_region_bot = Rows - 1;
387     gui.scroll_region_left = 0;
388     gui.scroll_region_right = Columns - 1;
389     gui.highlight_mask = HL_NORMAL;
390     gui.char_width = 1;
391     gui.char_height = 1;
392     gui.char_ascent = 0;
393     gui.border_width = 0;
394 
395     gui.norm_font = NOFONT;
396 #ifndef FEAT_GUI_GTK
397     gui.bold_font = NOFONT;
398     gui.ital_font = NOFONT;
399     gui.boldital_font = NOFONT;
400 # ifdef FEAT_XFONTSET
401     gui.fontset = NOFONTSET;
402 # endif
403 #endif
404 #ifdef FEAT_MBYTE
405     gui.wide_font = NOFONT;
406 # ifndef FEAT_GUI_GTK
407     gui.wide_bold_font = NOFONT;
408     gui.wide_ital_font = NOFONT;
409     gui.wide_boldital_font = NOFONT;
410 # endif
411 #endif
412 
413 #ifdef FEAT_MENU
414 # ifndef FEAT_GUI_GTK
415 #  ifdef FONTSET_ALWAYS
416     gui.menu_fontset = NOFONTSET;
417 #  else
418     gui.menu_font = NOFONT;
419 #  endif
420 # endif
421     gui.menu_is_active = TRUE;	    /* default: include menu */
422 # ifndef FEAT_GUI_GTK
423     gui.menu_height = MENU_DEFAULT_HEIGHT;
424     gui.menu_width = 0;
425 # endif
426 #endif
427 #if defined(FEAT_TOOLBAR) && (defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA))
428     gui.toolbar_height = 0;
429 #endif
430 #if defined(FEAT_FOOTER) && defined(FEAT_GUI_MOTIF)
431     gui.footer_height = 0;
432 #endif
433 #ifdef FEAT_BEVAL_TIP
434     gui.tooltip_fontset = NOFONTSET;
435 #endif
436 
437     gui.scrollbar_width = gui.scrollbar_height = SB_DEFAULT_WIDTH;
438     gui.prev_wrap = -1;
439 
440 #ifdef ALWAYS_USE_GUI
441     result = OK;
442 #else
443 # ifdef FEAT_GUI_GTK
444     /*
445      * Note: Don't call gtk_init_check() before fork, it will be called after
446      * the fork. When calling it before fork, it make vim hang for a while.
447      * See gui_do_fork().
448      * Use a simpler check if the GUI window can probably be opened.
449      */
450     result = gui.dofork ? gui_mch_early_init_check(TRUE) : gui_mch_init_check();
451 # else
452     result = gui_mch_init_check();
453 # endif
454 #endif
455     return result;
456 }
457 
458 /*
459  * This is the call which starts the GUI.
460  */
461     void
462 gui_init(void)
463 {
464     win_T	*wp;
465     static int	recursive = 0;
466 
467     /*
468      * It's possible to use ":gui" in a .gvimrc file.  The first halve of this
469      * function will then be executed at the first call, the rest by the
470      * recursive call.  This allow the shell to be opened halfway reading a
471      * gvimrc file.
472      */
473     if (!recursive)
474     {
475 	++recursive;
476 
477 	clip_init(TRUE);
478 
479 	/* If can't initialize, don't try doing the rest */
480 	if (gui_init_check() == FAIL)
481 	{
482 	    --recursive;
483 	    clip_init(FALSE);
484 	    return;
485 	}
486 
487 	/*
488 	 * Reset 'paste'.  It's useful in the terminal, but not in the GUI.  It
489 	 * breaks the Paste toolbar button.
490 	 */
491 	set_option_value((char_u *)"paste", 0L, NULL, 0);
492 
493 	/*
494 	 * Set up system-wide default menus.
495 	 */
496 #if defined(SYS_MENU_FILE) && defined(FEAT_MENU)
497 	if (vim_strchr(p_go, GO_NOSYSMENU) == NULL)
498 	{
499 	    sys_menu = TRUE;
500 	    do_source((char_u *)SYS_MENU_FILE, FALSE, DOSO_NONE);
501 	    sys_menu = FALSE;
502 	}
503 #endif
504 
505 	/*
506 	 * Switch on the mouse by default, unless the user changed it already.
507 	 * This can then be changed in the .gvimrc.
508 	 */
509 	if (!option_was_set((char_u *)"mouse"))
510 	    set_string_option_direct((char_u *)"mouse", -1,
511 					   (char_u *)"a", OPT_FREE, SID_NONE);
512 
513 	/*
514 	 * If -U option given, use only the initializations from that file and
515 	 * nothing else.  Skip all initializations for "-U NONE" or "-u NORC".
516 	 */
517 	if (use_gvimrc != NULL)
518 	{
519 	    if (STRCMP(use_gvimrc, "NONE") != 0
520 		    && STRCMP(use_gvimrc, "NORC") != 0
521 		    && do_source(use_gvimrc, FALSE, DOSO_NONE) != OK)
522 		EMSG2(_("E230: Cannot read from \"%s\""), use_gvimrc);
523 	}
524 	else
525 	{
526 	    /*
527 	     * Get system wide defaults for gvim, only when file name defined.
528 	     */
529 #ifdef SYS_GVIMRC_FILE
530 	    do_source((char_u *)SYS_GVIMRC_FILE, FALSE, DOSO_NONE);
531 #endif
532 
533 	    /*
534 	     * Try to read GUI initialization commands from the following
535 	     * places:
536 	     * - environment variable GVIMINIT
537 	     * - the user gvimrc file (~/.gvimrc)
538 	     * - the second user gvimrc file ($VIM/.gvimrc for Dos)
539 	     * - the third user gvimrc file ($VIM/.gvimrc for Amiga)
540 	     * The first that exists is used, the rest is ignored.
541 	     */
542 	    if (process_env((char_u *)"GVIMINIT", FALSE) == FAIL
543 		 && do_source((char_u *)USR_GVIMRC_FILE, TRUE,
544 							  DOSO_GVIMRC) == FAIL
545 #ifdef USR_GVIMRC_FILE2
546 		 && do_source((char_u *)USR_GVIMRC_FILE2, TRUE,
547 							  DOSO_GVIMRC) == FAIL
548 #endif
549 #ifdef USR_GVIMRC_FILE3
550 		 && do_source((char_u *)USR_GVIMRC_FILE3, TRUE,
551 							  DOSO_GVIMRC) == FAIL
552 #endif
553 				)
554 	    {
555 #ifdef USR_GVIMRC_FILE4
556 		(void)do_source((char_u *)USR_GVIMRC_FILE4, TRUE, DOSO_GVIMRC);
557 #endif
558 	    }
559 
560 	    /*
561 	     * Read initialization commands from ".gvimrc" in current
562 	     * directory.  This is only done if the 'exrc' option is set.
563 	     * Because of security reasons we disallow shell and write
564 	     * commands now, except for unix if the file is owned by the user
565 	     * or 'secure' option has been reset in environment of global
566 	     * ".gvimrc".
567 	     * Only do this if GVIMRC_FILE is not the same as USR_GVIMRC_FILE,
568 	     * USR_GVIMRC_FILE2, USR_GVIMRC_FILE3 or SYS_GVIMRC_FILE.
569 	     */
570 	    if (p_exrc)
571 	    {
572 #ifdef UNIX
573 		{
574 		    stat_T s;
575 
576 		    /* if ".gvimrc" file is not owned by user, set 'secure'
577 		     * mode */
578 		    if (mch_stat(GVIMRC_FILE, &s) || s.st_uid != getuid())
579 			secure = p_secure;
580 		}
581 #else
582 		secure = p_secure;
583 #endif
584 
585 		if (       fullpathcmp((char_u *)USR_GVIMRC_FILE,
586 				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
587 #ifdef SYS_GVIMRC_FILE
588 			&& fullpathcmp((char_u *)SYS_GVIMRC_FILE,
589 				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
590 #endif
591 #ifdef USR_GVIMRC_FILE2
592 			&& fullpathcmp((char_u *)USR_GVIMRC_FILE2,
593 				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
594 #endif
595 #ifdef USR_GVIMRC_FILE3
596 			&& fullpathcmp((char_u *)USR_GVIMRC_FILE3,
597 				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
598 #endif
599 #ifdef USR_GVIMRC_FILE4
600 			&& fullpathcmp((char_u *)USR_GVIMRC_FILE4,
601 				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
602 #endif
603 			)
604 		    do_source((char_u *)GVIMRC_FILE, TRUE, DOSO_GVIMRC);
605 
606 		if (secure == 2)
607 		    need_wait_return = TRUE;
608 		secure = 0;
609 	    }
610 	}
611 
612 	if (need_wait_return || msg_didany)
613 	    wait_return(TRUE);
614 
615 	--recursive;
616     }
617 
618     /* If recursive call opened the shell, return here from the first call */
619     if (gui.in_use)
620 	return;
621 
622     /*
623      * Create the GUI shell.
624      */
625     gui.in_use = TRUE;		/* Must be set after menus have been set up */
626     if (gui_mch_init() == FAIL)
627 	goto error;
628 
629     /* Avoid a delay for an error message that was printed in the terminal
630      * where Vim was started. */
631     emsg_on_display = FALSE;
632     msg_scrolled = 0;
633     clear_sb_text(TRUE);
634     need_wait_return = FALSE;
635     msg_didany = FALSE;
636 
637     /*
638      * Check validity of any generic resources that may have been loaded.
639      */
640     if (gui.border_width < 0)
641 	gui.border_width = 0;
642 
643     /*
644      * Set up the fonts.  First use a font specified with "-fn" or "-font".
645      */
646     if (font_argument != NULL)
647 	set_option_value((char_u *)"gfn", 0L, (char_u *)font_argument, 0);
648     if (
649 #ifdef FEAT_XFONTSET
650 	    (*p_guifontset == NUL
651 	     || gui_init_font(p_guifontset, TRUE) == FAIL) &&
652 #endif
653 	    gui_init_font(*p_guifont == NUL ? hl_get_font_name()
654 						  : p_guifont, FALSE) == FAIL)
655     {
656 	EMSG(_("E665: Cannot start GUI, no valid font found"));
657 	goto error2;
658     }
659 #ifdef FEAT_MBYTE
660     if (gui_get_wide_font() == FAIL)
661 	EMSG(_("E231: 'guifontwide' invalid"));
662 #endif
663 
664     gui.num_cols = Columns;
665     gui.num_rows = Rows;
666     gui_reset_scroll_region();
667 
668     /* Create initial scrollbars */
669     FOR_ALL_WINDOWS(wp)
670     {
671 	gui_create_scrollbar(&wp->w_scrollbars[SBAR_LEFT], SBAR_LEFT, wp);
672 	gui_create_scrollbar(&wp->w_scrollbars[SBAR_RIGHT], SBAR_RIGHT, wp);
673     }
674     gui_create_scrollbar(&gui.bottom_sbar, SBAR_BOTTOM, NULL);
675 
676 #ifdef FEAT_MENU
677     gui_create_initial_menus(root_menu);
678 #endif
679 #ifdef FEAT_SUN_WORKSHOP
680     if (usingSunWorkShop)
681 	workshop_init();
682 #endif
683 #ifdef FEAT_SIGN_ICONS
684     sign_gui_started();
685 #endif
686 
687     /* Configure the desired menu and scrollbars */
688     gui_init_which_components(NULL);
689 
690     /* All components of the GUI have been created now */
691     gui.shell_created = TRUE;
692 
693 #ifndef FEAT_GUI_GTK
694     /* Set the shell size, adjusted for the screen size.  For GTK this only
695      * works after the shell has been opened, thus it is further down. */
696     gui_set_shellsize(TRUE, TRUE, RESIZE_BOTH);
697 #endif
698 #if defined(FEAT_GUI_MOTIF) && defined(FEAT_MENU)
699     /* Need to set the size of the menubar after all the menus have been
700      * created. */
701     gui_mch_compute_menu_height((Widget)0);
702 #endif
703 
704     /*
705      * Actually open the GUI shell.
706      */
707     if (gui_mch_open() != FAIL)
708     {
709 #ifdef FEAT_TITLE
710 	maketitle();
711 	resettitle();
712 #endif
713 	init_gui_options();
714 #ifdef FEAT_ARABIC
715 	/* Our GUI can't do bidi. */
716 	p_tbidi = FALSE;
717 #endif
718 #if defined(FEAT_GUI_GTK)
719 	/* Give GTK+ a chance to put all widget's into place. */
720 	gui_mch_update();
721 
722 # ifdef FEAT_MENU
723 	/* If there is no 'm' in 'guioptions' we need to remove the menu now.
724 	 * It was still there to make F10 work. */
725 	if (vim_strchr(p_go, GO_MENUS) == NULL)
726 	{
727 	    --gui.starting;
728 	    gui_mch_enable_menu(FALSE);
729 	    ++gui.starting;
730 	    gui_mch_update();
731 	}
732 # endif
733 
734 	/* Now make sure the shell fits on the screen. */
735 	gui_set_shellsize(TRUE, TRUE, RESIZE_BOTH);
736 #endif
737 	/* When 'lines' was set while starting up the topframe may have to be
738 	 * resized. */
739 	win_new_shellsize();
740 
741 #ifdef FEAT_BEVAL_GUI
742 	/* Always create the Balloon Evaluation area, but disable it when
743 	 * 'ballooneval' is off. */
744 	if (balloonEval != NULL)
745 	    vim_free(balloonEval);
746 	balloonEvalForTerm = FALSE;
747 # ifdef FEAT_GUI_GTK
748 	balloonEval = gui_mch_create_beval_area(gui.drawarea, NULL,
749 						     &general_beval_cb, NULL);
750 # else
751 #  if defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA)
752 	{
753 	    extern Widget	textArea;
754 	    balloonEval = gui_mch_create_beval_area(textArea, NULL,
755 						     &general_beval_cb, NULL);
756 	}
757 #  else
758 #   ifdef FEAT_GUI_W32
759 	balloonEval = gui_mch_create_beval_area(NULL, NULL,
760 						     &general_beval_cb, NULL);
761 #   endif
762 #  endif
763 # endif
764 	if (!p_beval)
765 	    gui_mch_disable_beval_area(balloonEval);
766 #endif
767 
768 #if defined(FEAT_XIM) && defined(FEAT_GUI_GTK)
769 	if (!im_xim_isvalid_imactivate())
770 	    EMSG(_("E599: Value of 'imactivatekey' is invalid"));
771 #endif
772 	/* When 'cmdheight' was set during startup it may not have taken
773 	 * effect yet. */
774 	if (p_ch != 1L)
775 	    command_height();
776 
777 	return;
778     }
779 
780 error2:
781 #ifdef FEAT_GUI_X11
782     /* undo gui_mch_init() */
783     gui_mch_uninit();
784 #endif
785 
786 error:
787     gui.in_use = FALSE;
788     clip_init(FALSE);
789 }
790 
791 
792     void
793 gui_exit(int rc)
794 {
795     /* don't free the fonts, it leads to a BUS error
796      * [email protected] Jul 99 */
797     free_highlight_fonts();
798     gui.in_use = FALSE;
799     gui_mch_exit(rc);
800 }
801 
802 #if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11) || defined(FEAT_GUI_MSWIN) \
803 	|| defined(FEAT_GUI_PHOTON) || defined(FEAT_GUI_MAC) || defined(PROTO)
804 # define NEED_GUI_UPDATE_SCREEN 1
805 /*
806  * Called when the GUI shell is closed by the user.  If there are no changed
807  * files Vim exits, otherwise there will be a dialog to ask the user what to
808  * do.
809  * When this function returns, Vim should NOT exit!
810  */
811     void
812 gui_shell_closed(void)
813 {
814     cmdmod_T	    save_cmdmod;
815 
816     save_cmdmod = cmdmod;
817 
818     /* Only exit when there are no changed files */
819     exiting = TRUE;
820 # ifdef FEAT_BROWSE
821     cmdmod.browse = TRUE;
822 # endif
823 # if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
824     cmdmod.confirm = TRUE;
825 # endif
826     /* If there are changed buffers, present the user with a dialog if
827      * possible, otherwise give an error message. */
828     if (!check_changed_any(FALSE, FALSE))
829 	getout(0);
830 
831     exiting = FALSE;
832     cmdmod = save_cmdmod;
833     gui_update_screen();	/* redraw, window may show changed buffer */
834 }
835 #endif
836 
837 /*
838  * Set the font.  "font_list" is a comma separated list of font names.  The
839  * first font name that works is used.  If none is found, use the default
840  * font.
841  * If "fontset" is TRUE, the "font_list" is used as one name for the fontset.
842  * Return OK when able to set the font.  When it failed FAIL is returned and
843  * the fonts are unchanged.
844  */
845     int
846 gui_init_font(char_u *font_list, int fontset UNUSED)
847 {
848 #define FONTLEN 320
849     char_u	font_name[FONTLEN];
850     int		font_list_empty = FALSE;
851     int		ret = FAIL;
852 
853     if (!gui.in_use)
854 	return FAIL;
855 
856     font_name[0] = NUL;
857     if (*font_list == NUL)
858 	font_list_empty = TRUE;
859     else
860     {
861 #ifdef FEAT_XFONTSET
862 	/* When using a fontset, the whole list of fonts is one name. */
863 	if (fontset)
864 	    ret = gui_mch_init_font(font_list, TRUE);
865 	else
866 #endif
867 	    while (*font_list != NUL)
868 	    {
869 		/* Isolate one comma separated font name. */
870 		(void)copy_option_part(&font_list, font_name, FONTLEN, ",");
871 
872 		/* Careful!!!  The Win32 version of gui_mch_init_font(), when
873 		 * called with "*" will change p_guifont to the selected font
874 		 * name, which frees the old value.  This makes font_list
875 		 * invalid.  Thus when OK is returned here, font_list must no
876 		 * longer be used! */
877 		if (gui_mch_init_font(font_name, FALSE) == OK)
878 		{
879 #if defined(FEAT_MBYTE) && !defined(FEAT_GUI_GTK)
880 		    /* If it's a Unicode font, try setting 'guifontwide' to a
881 		     * similar double-width font. */
882 		    if ((p_guifontwide == NULL || *p_guifontwide == NUL)
883 				&& strstr((char *)font_name, "10646") != NULL)
884 			set_guifontwide(font_name);
885 #endif
886 		    ret = OK;
887 		    break;
888 		}
889 	    }
890     }
891 
892     if (ret != OK
893 	    && STRCMP(font_list, "*") != 0
894 	    && (font_list_empty || gui.norm_font == NOFONT))
895     {
896 	/*
897 	 * Couldn't load any font in 'font_list', keep the current font if
898 	 * there is one.  If 'font_list' is empty, or if there is no current
899 	 * font, tell gui_mch_init_font() to try to find a font we can load.
900 	 */
901 	ret = gui_mch_init_font(NULL, FALSE);
902     }
903 
904     if (ret == OK)
905     {
906 #ifndef FEAT_GUI_GTK
907 	/* Set normal font as current font */
908 # ifdef FEAT_XFONTSET
909 	if (gui.fontset != NOFONTSET)
910 	    gui_mch_set_fontset(gui.fontset);
911 	else
912 # endif
913 	    gui_mch_set_font(gui.norm_font);
914 #endif
915 	gui_set_shellsize(TRUE, TRUE, RESIZE_BOTH);
916     }
917 
918     return ret;
919 }
920 
921 #if defined(FEAT_MBYTE) || defined(PROTO)
922 # ifndef FEAT_GUI_GTK
923 /*
924  * Try setting 'guifontwide' to a font twice as wide as "name".
925  */
926     static void
927 set_guifontwide(char_u *name)
928 {
929     int		i = 0;
930     char_u	wide_name[FONTLEN + 10]; /* room for 2 * width and '*' */
931     char_u	*wp = NULL;
932     char_u	*p;
933     GuiFont	font;
934 
935     wp = wide_name;
936     for (p = name; *p != NUL; ++p)
937     {
938 	*wp++ = *p;
939 	if (*p == '-')
940 	{
941 	    ++i;
942 	    if (i == 6)		/* font type: change "--" to "-*-" */
943 	    {
944 		if (p[1] == '-')
945 		    *wp++ = '*';
946 	    }
947 	    else if (i == 12)	/* found the width */
948 	    {
949 		++p;
950 		i = getdigits(&p);
951 		if (i != 0)
952 		{
953 		    /* Double the width specification. */
954 		    sprintf((char *)wp, "%d%s", i * 2, p);
955 		    font = gui_mch_get_font(wide_name, FALSE);
956 		    if (font != NOFONT)
957 		    {
958 			gui_mch_free_font(gui.wide_font);
959 			gui.wide_font = font;
960 			set_string_option_direct((char_u *)"gfw", -1,
961 						      wide_name, OPT_FREE, 0);
962 		    }
963 		}
964 		break;
965 	    }
966 	}
967     }
968 }
969 # endif /* !FEAT_GUI_GTK */
970 
971 /*
972  * Get the font for 'guifontwide'.
973  * Return FAIL for an invalid font name.
974  */
975     int
976 gui_get_wide_font(void)
977 {
978     GuiFont	font = NOFONT;
979     char_u	font_name[FONTLEN];
980     char_u	*p;
981 
982     if (!gui.in_use)	    /* Can't allocate font yet, assume it's OK. */
983 	return OK;	    /* Will give an error message later. */
984 
985     if (p_guifontwide != NULL && *p_guifontwide != NUL)
986     {
987 	for (p = p_guifontwide; *p != NUL; )
988 	{
989 	    /* Isolate one comma separated font name. */
990 	    (void)copy_option_part(&p, font_name, FONTLEN, ",");
991 	    font = gui_mch_get_font(font_name, FALSE);
992 	    if (font != NOFONT)
993 		break;
994 	}
995 	if (font == NOFONT)
996 	    return FAIL;
997     }
998 
999     gui_mch_free_font(gui.wide_font);
1000 # ifdef FEAT_GUI_GTK
1001     /* Avoid unnecessary overhead if 'guifontwide' is equal to 'guifont'. */
1002     if (font != NOFONT && gui.norm_font != NOFONT
1003 			 && pango_font_description_equal(font, gui.norm_font))
1004     {
1005 	gui.wide_font = NOFONT;
1006 	gui_mch_free_font(font);
1007     }
1008     else
1009 # endif
1010 	gui.wide_font = font;
1011 # ifdef FEAT_GUI_MSWIN
1012     gui_mch_wide_font_changed();
1013 # else
1014     /*
1015      * TODO: setup wide_bold_font, wide_ital_font and wide_boldital_font to
1016      * support those fonts for 'guifontwide'.
1017      */
1018 # endif
1019     return OK;
1020 }
1021 #endif
1022 
1023     void
1024 gui_set_cursor(int row, int col)
1025 {
1026     gui.row = row;
1027     gui.col = col;
1028 }
1029 
1030 /*
1031  * gui_check_pos - check if the cursor is on the screen.
1032  */
1033     static void
1034 gui_check_pos(void)
1035 {
1036     if (gui.row >= screen_Rows)
1037 	gui.row = screen_Rows - 1;
1038     if (gui.col >= screen_Columns)
1039 	gui.col = screen_Columns - 1;
1040     if (gui.cursor_row >= screen_Rows || gui.cursor_col >= screen_Columns)
1041 	gui.cursor_is_valid = FALSE;
1042 }
1043 
1044 /*
1045  * Redraw the cursor if necessary or when forced.
1046  * Careful: The contents of ScreenLines[] must match what is on the screen,
1047  * otherwise this goes wrong.  May need to call out_flush() first.
1048  */
1049     void
1050 gui_update_cursor(
1051     int		force,		/* when TRUE, update even when not moved */
1052     int		clear_selection)/* clear selection under cursor */
1053 {
1054     int		cur_width = 0;
1055     int		cur_height = 0;
1056     int		old_hl_mask;
1057     cursorentry_T *shape;
1058     int		id;
1059 #ifdef FEAT_TERMINAL
1060     guicolor_T	shape_fg = INVALCOLOR;
1061     guicolor_T	shape_bg = INVALCOLOR;
1062 #endif
1063     guicolor_T	cfg, cbg, cc;	/* cursor fore-/background color */
1064     int		cattr;		/* cursor attributes */
1065     int		attr;
1066     attrentry_T *aep = NULL;
1067 
1068     /* Don't update the cursor when halfway busy scrolling or the screen size
1069      * doesn't match 'columns' and 'lines.  ScreenLines[] isn't valid then. */
1070     if (!can_update_cursor || screen_Columns != gui.num_cols
1071 					       || screen_Rows != gui.num_rows)
1072 	return;
1073 
1074     gui_check_pos();
1075     if (!gui.cursor_is_valid || force
1076 		    || gui.row != gui.cursor_row || gui.col != gui.cursor_col)
1077     {
1078 	gui_undraw_cursor();
1079 	if (gui.row < 0)
1080 	    return;
1081 #ifdef FEAT_MBYTE
1082 	if (gui.row != gui.cursor_row || gui.col != gui.cursor_col)
1083 	    im_set_position(gui.row, gui.col);
1084 #endif
1085 	gui.cursor_row = gui.row;
1086 	gui.cursor_col = gui.col;
1087 
1088 	/* Only write to the screen after ScreenLines[] has been initialized */
1089 	if (!screen_cleared || ScreenLines == NULL)
1090 	    return;
1091 
1092 	/* Clear the selection if we are about to write over it */
1093 	if (clear_selection)
1094 	    clip_may_clear_selection(gui.row, gui.row);
1095 	/* Check that the cursor is inside the shell (resizing may have made
1096 	 * it invalid) */
1097 	if (gui.row >= screen_Rows || gui.col >= screen_Columns)
1098 	    return;
1099 
1100 	gui.cursor_is_valid = TRUE;
1101 
1102 	/*
1103 	 * How the cursor is drawn depends on the current mode.
1104 	 * When in a terminal window use the shape/color specified there.
1105 	 */
1106 #ifdef FEAT_TERMINAL
1107 	if (terminal_is_active())
1108 	    shape = term_get_cursor_shape(&shape_fg, &shape_bg);
1109 	else
1110 #endif
1111 	    shape = &shape_table[get_shape_idx(FALSE)];
1112 	if (State & LANGMAP)
1113 	    id = shape->id_lm;
1114 	else
1115 	    id = shape->id;
1116 
1117 	/* get the colors and attributes for the cursor.  Default is inverted */
1118 	cfg = INVALCOLOR;
1119 	cbg = INVALCOLOR;
1120 	cattr = HL_INVERSE;
1121 	gui_mch_set_blinking(shape->blinkwait,
1122 			     shape->blinkon,
1123 			     shape->blinkoff);
1124 	if (shape->blinkwait == 0 || shape->blinkon == 0
1125 						       || shape->blinkoff == 0)
1126 	    gui_mch_stop_blink();
1127 #ifdef FEAT_TERMINAL
1128 	if (shape_bg != INVALCOLOR)
1129 	{
1130 	    cattr = 0;
1131 	    cfg = shape_fg;
1132 	    cbg = shape_bg;
1133 	}
1134 	else
1135 #endif
1136 	if (id > 0)
1137 	{
1138 	    cattr = syn_id2colors(id, &cfg, &cbg);
1139 #if defined(FEAT_MBYTE) || defined(FEAT_HANGULIN)
1140 	    {
1141 		static int iid;
1142 		guicolor_T fg, bg;
1143 
1144 		if (
1145 # if defined(FEAT_GUI_GTK) && !defined(FEAT_HANGULIN)
1146 			preedit_get_status()
1147 # else
1148 			im_get_status()
1149 # endif
1150 			)
1151 		{
1152 		    iid = syn_name2id((char_u *)"CursorIM");
1153 		    if (iid > 0)
1154 		    {
1155 			syn_id2colors(iid, &fg, &bg);
1156 			if (bg != INVALCOLOR)
1157 			    cbg = bg;
1158 			if (fg != INVALCOLOR)
1159 			    cfg = fg;
1160 		    }
1161 		}
1162 	    }
1163 #endif
1164 	}
1165 
1166 	/*
1167 	 * Get the attributes for the character under the cursor.
1168 	 * When no cursor color was given, use the character color.
1169 	 */
1170 	attr = ScreenAttrs[LineOffset[gui.row] + gui.col];
1171 	if (attr > HL_ALL)
1172 	    aep = syn_gui_attr2entry(attr);
1173 	if (aep != NULL)
1174 	{
1175 	    attr = aep->ae_attr;
1176 	    if (cfg == INVALCOLOR)
1177 		cfg = ((attr & HL_INVERSE)  ? aep->ae_u.gui.bg_color
1178 					    : aep->ae_u.gui.fg_color);
1179 	    if (cbg == INVALCOLOR)
1180 		cbg = ((attr & HL_INVERSE)  ? aep->ae_u.gui.fg_color
1181 					    : aep->ae_u.gui.bg_color);
1182 	}
1183 	if (cfg == INVALCOLOR)
1184 	    cfg = (attr & HL_INVERSE) ? gui.back_pixel : gui.norm_pixel;
1185 	if (cbg == INVALCOLOR)
1186 	    cbg = (attr & HL_INVERSE) ? gui.norm_pixel : gui.back_pixel;
1187 
1188 #ifdef FEAT_XIM
1189 	if (aep != NULL)
1190 	{
1191 	    xim_bg_color = ((attr & HL_INVERSE) ? aep->ae_u.gui.fg_color
1192 						: aep->ae_u.gui.bg_color);
1193 	    xim_fg_color = ((attr & HL_INVERSE) ? aep->ae_u.gui.bg_color
1194 						: aep->ae_u.gui.fg_color);
1195 	    if (xim_bg_color == INVALCOLOR)
1196 		xim_bg_color = (attr & HL_INVERSE) ? gui.norm_pixel
1197 						   : gui.back_pixel;
1198 	    if (xim_fg_color == INVALCOLOR)
1199 		xim_fg_color = (attr & HL_INVERSE) ? gui.back_pixel
1200 						   : gui.norm_pixel;
1201 	}
1202 	else
1203 	{
1204 	    xim_bg_color = (attr & HL_INVERSE) ? gui.norm_pixel
1205 					       : gui.back_pixel;
1206 	    xim_fg_color = (attr & HL_INVERSE) ? gui.back_pixel
1207 					       : gui.norm_pixel;
1208 	}
1209 #endif
1210 
1211 	attr &= ~HL_INVERSE;
1212 	if (cattr & HL_INVERSE)
1213 	{
1214 	    cc = cbg;
1215 	    cbg = cfg;
1216 	    cfg = cc;
1217 	}
1218 	cattr &= ~HL_INVERSE;
1219 
1220 	/*
1221 	 * When we don't have window focus, draw a hollow cursor.
1222 	 */
1223 	if (!gui.in_focus)
1224 	{
1225 	    gui_mch_draw_hollow_cursor(cbg);
1226 	    return;
1227 	}
1228 
1229 	old_hl_mask = gui.highlight_mask;
1230 	if (shape->shape == SHAPE_BLOCK
1231 #ifdef FEAT_HANGULIN
1232 		|| composing_hangul
1233 #endif
1234 	   )
1235 	{
1236 	    /*
1237 	     * Draw the text character with the cursor colors.	Use the
1238 	     * character attributes plus the cursor attributes.
1239 	     */
1240 	    gui.highlight_mask = (cattr | attr);
1241 #ifdef FEAT_HANGULIN
1242 	    if (composing_hangul)
1243 	    {
1244 		char_u *comp_buf;
1245 		int comp_len;
1246 
1247 		comp_buf = hangul_composing_buffer_get(&comp_len);
1248 		if (comp_buf)
1249 		{
1250 		    (void)gui_outstr_nowrap(comp_buf, comp_len,
1251 					    GUI_MON_IS_CURSOR | GUI_MON_NOCLEAR,
1252 					    cfg, cbg, 0);
1253 		    vim_free(comp_buf);
1254 		}
1255 	    }
1256 	    else
1257 #endif
1258 		(void)gui_screenchar(LineOffset[gui.row] + gui.col,
1259 			GUI_MON_IS_CURSOR | GUI_MON_NOCLEAR, cfg, cbg, 0);
1260 	}
1261 	else
1262 	{
1263 #if defined(FEAT_MBYTE) && defined(FEAT_RIGHTLEFT)
1264 	    int	    col_off = FALSE;
1265 #endif
1266 	    /*
1267 	     * First draw the partial cursor, then overwrite with the text
1268 	     * character, using a transparent background.
1269 	     */
1270 	    if (shape->shape == SHAPE_VER)
1271 	    {
1272 		cur_height = gui.char_height;
1273 		cur_width = (gui.char_width * shape->percentage + 99) / 100;
1274 	    }
1275 	    else
1276 	    {
1277 		cur_height = (gui.char_height * shape->percentage + 99) / 100;
1278 		cur_width = gui.char_width;
1279 	    }
1280 #ifdef FEAT_MBYTE
1281 	    if (has_mbyte && (*mb_off2cells)(LineOffset[gui.row] + gui.col,
1282 				    LineOffset[gui.row] + screen_Columns) > 1)
1283 	    {
1284 		/* Double wide character. */
1285 		if (shape->shape != SHAPE_VER)
1286 		    cur_width += gui.char_width;
1287 # ifdef FEAT_RIGHTLEFT
1288 		if (CURSOR_BAR_RIGHT)
1289 		{
1290 		    /* gui.col points to the left halve of the character but
1291 		     * the vertical line needs to be on the right halve.
1292 		     * A double-wide horizontal line is also drawn from the
1293 		     * right halve in gui_mch_draw_part_cursor(). */
1294 		    col_off = TRUE;
1295 		    ++gui.col;
1296 		}
1297 # endif
1298 	    }
1299 #endif
1300 	    gui_mch_draw_part_cursor(cur_width, cur_height, cbg);
1301 #if defined(FEAT_MBYTE) && defined(FEAT_RIGHTLEFT)
1302 	    if (col_off)
1303 		--gui.col;
1304 #endif
1305 
1306 #ifndef FEAT_GUI_MSWIN	    /* doesn't seem to work for MSWindows */
1307 	    gui.highlight_mask = ScreenAttrs[LineOffset[gui.row] + gui.col];
1308 	    (void)gui_screenchar(LineOffset[gui.row] + gui.col,
1309 		    GUI_MON_TRS_CURSOR | GUI_MON_NOCLEAR,
1310 		    (guicolor_T)0, (guicolor_T)0, 0);
1311 #endif
1312 	}
1313 	gui.highlight_mask = old_hl_mask;
1314     }
1315 }
1316 
1317 #if defined(FEAT_MENU) || defined(PROTO)
1318     void
1319 gui_position_menu(void)
1320 {
1321 # if !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_MOTIF)
1322     if (gui.menu_is_active && gui.in_use)
1323 	gui_mch_set_menu_pos(0, 0, gui.menu_width, gui.menu_height);
1324 # endif
1325 }
1326 #endif
1327 
1328 /*
1329  * Position the various GUI components (text area, menu).  The vertical
1330  * scrollbars are NOT handled here.  See gui_update_scrollbars().
1331  */
1332     static void
1333 gui_position_components(int total_width UNUSED)
1334 {
1335     int	    text_area_x;
1336     int	    text_area_y;
1337     int	    text_area_width;
1338     int	    text_area_height;
1339 
1340     /* avoid that moving components around generates events */
1341     ++hold_gui_events;
1342 
1343     text_area_x = 0;
1344     if (gui.which_scrollbars[SBAR_LEFT])
1345 	text_area_x += gui.scrollbar_width;
1346 
1347     text_area_y = 0;
1348 #if defined(FEAT_MENU) && !(defined(FEAT_GUI_GTK) || defined(FEAT_GUI_PHOTON))
1349     gui.menu_width = total_width;
1350     if (gui.menu_is_active)
1351 	text_area_y += gui.menu_height;
1352 #endif
1353 #if defined(FEAT_TOOLBAR) && defined(FEAT_GUI_MSWIN)
1354     if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
1355 	text_area_y = TOOLBAR_BUTTON_HEIGHT + TOOLBAR_BORDER_HEIGHT;
1356 #endif
1357 
1358 # if defined(FEAT_GUI_TABLINE) && (defined(FEAT_GUI_MSWIN) \
1359 	|| defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_MAC))
1360     if (gui_has_tabline())
1361 	text_area_y += gui.tabline_height;
1362 #endif
1363 
1364 #if defined(FEAT_TOOLBAR) && (defined(FEAT_GUI_MOTIF) || defined(FEAT_GUI_ATHENA))
1365     if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
1366     {
1367 # ifdef FEAT_GUI_ATHENA
1368 	gui_mch_set_toolbar_pos(0, text_area_y,
1369 				gui.menu_width, gui.toolbar_height);
1370 # endif
1371 	text_area_y += gui.toolbar_height;
1372     }
1373 #endif
1374 
1375     text_area_width = gui.num_cols * gui.char_width + gui.border_offset * 2;
1376     text_area_height = gui.num_rows * gui.char_height + gui.border_offset * 2;
1377 
1378     gui_mch_set_text_area_pos(text_area_x,
1379 			      text_area_y,
1380 			      text_area_width,
1381 			      text_area_height
1382 #if defined(FEAT_XIM) && !defined(FEAT_GUI_GTK)
1383 				  + xim_get_status_area_height()
1384 #endif
1385 			      );
1386 #ifdef FEAT_MENU
1387     gui_position_menu();
1388 #endif
1389     if (gui.which_scrollbars[SBAR_BOTTOM])
1390 	gui_mch_set_scrollbar_pos(&gui.bottom_sbar,
1391 				  text_area_x,
1392 				  text_area_y + text_area_height,
1393 				  text_area_width,
1394 				  gui.scrollbar_height);
1395     gui.left_sbar_x = 0;
1396     gui.right_sbar_x = text_area_x + text_area_width;
1397 
1398     --hold_gui_events;
1399 }
1400 
1401 /*
1402  * Get the width of the widgets and decorations to the side of the text area.
1403  */
1404     int
1405 gui_get_base_width(void)
1406 {
1407     int	    base_width;
1408 
1409     base_width = 2 * gui.border_offset;
1410     if (gui.which_scrollbars[SBAR_LEFT])
1411 	base_width += gui.scrollbar_width;
1412     if (gui.which_scrollbars[SBAR_RIGHT])
1413 	base_width += gui.scrollbar_width;
1414     return base_width;
1415 }
1416 
1417 /*
1418  * Get the height of the widgets and decorations above and below the text area.
1419  */
1420     int
1421 gui_get_base_height(void)
1422 {
1423     int	    base_height;
1424 
1425     base_height = 2 * gui.border_offset;
1426     if (gui.which_scrollbars[SBAR_BOTTOM])
1427 	base_height += gui.scrollbar_height;
1428 #ifdef FEAT_GUI_GTK
1429     /* We can't take the sizes properly into account until anything is
1430      * realized.  Therefore we recalculate all the values here just before
1431      * setting the size. (--mdcki) */
1432 #else
1433 # ifdef FEAT_MENU
1434     if (gui.menu_is_active)
1435 	base_height += gui.menu_height;
1436 # endif
1437 # ifdef FEAT_TOOLBAR
1438     if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
1439 #  if defined(FEAT_GUI_MSWIN) && defined(FEAT_TOOLBAR)
1440 	base_height += (TOOLBAR_BUTTON_HEIGHT + TOOLBAR_BORDER_HEIGHT);
1441 #  else
1442 	base_height += gui.toolbar_height;
1443 #  endif
1444 # endif
1445 # if defined(FEAT_GUI_TABLINE) && (defined(FEAT_GUI_MSWIN) \
1446 	|| defined(FEAT_GUI_MOTIF))
1447     if (gui_has_tabline())
1448 	base_height += gui.tabline_height;
1449 # endif
1450 # ifdef FEAT_FOOTER
1451     if (vim_strchr(p_go, GO_FOOTER) != NULL)
1452 	base_height += gui.footer_height;
1453 # endif
1454 # if defined(FEAT_GUI_MOTIF) && defined(FEAT_MENU)
1455     base_height += gui_mch_text_area_extra_height();
1456 # endif
1457 #endif
1458     return base_height;
1459 }
1460 
1461 /*
1462  * Should be called after the GUI shell has been resized.  Its arguments are
1463  * the new width and height of the shell in pixels.
1464  */
1465     void
1466 gui_resize_shell(int pixel_width, int pixel_height)
1467 {
1468     static int	busy = FALSE;
1469 
1470     if (!gui.shell_created)	    /* ignore when still initializing */
1471 	return;
1472 
1473     /*
1474      * Can't resize the screen while it is being redrawn.  Remember the new
1475      * size and handle it later.
1476      */
1477     if (updating_screen || busy)
1478     {
1479 	new_pixel_width = pixel_width;
1480 	new_pixel_height = pixel_height;
1481 	return;
1482     }
1483 
1484 again:
1485     new_pixel_width = 0;
1486     new_pixel_height = 0;
1487     busy = TRUE;
1488 
1489     /* Flush pending output before redrawing */
1490     out_flush();
1491 
1492     gui.num_cols = (pixel_width - gui_get_base_width()) / gui.char_width;
1493     gui.num_rows = (pixel_height - gui_get_base_height()) / gui.char_height;
1494 
1495     gui_position_components(pixel_width);
1496     gui_reset_scroll_region();
1497 
1498     /*
1499      * At the "more" and ":confirm" prompt there is no redraw, put the cursor
1500      * at the last line here (why does it have to be one row too low?).
1501      */
1502     if (State == ASKMORE || State == CONFIRM)
1503 	gui.row = gui.num_rows;
1504 
1505     /* Only comparing Rows and Columns may be sufficient, but let's stay on
1506      * the safe side. */
1507     if (gui.num_rows != screen_Rows || gui.num_cols != screen_Columns
1508 	    || gui.num_rows != Rows || gui.num_cols != Columns)
1509 	shell_resized();
1510 
1511     gui_update_scrollbars(TRUE);
1512     gui_update_cursor(FALSE, TRUE);
1513 #if defined(FEAT_XIM) && !defined(FEAT_GUI_GTK)
1514     xim_set_status_area();
1515 #endif
1516 
1517     busy = FALSE;
1518 
1519     /* We may have been called again while redrawing the screen.
1520      * Need to do it all again with the latest size then.  But only if the size
1521      * actually changed. */
1522     if (new_pixel_height)
1523     {
1524 	if (pixel_width == new_pixel_width && pixel_height == new_pixel_height)
1525 	{
1526 	    new_pixel_width = 0;
1527 	    new_pixel_height = 0;
1528 	}
1529 	else
1530 	{
1531 	    pixel_width = new_pixel_width;
1532 	    pixel_height = new_pixel_height;
1533 	    goto again;
1534 	}
1535     }
1536 }
1537 
1538 /*
1539  * Check if gui_resize_shell() must be called.
1540  */
1541     void
1542 gui_may_resize_shell(void)
1543 {
1544     if (new_pixel_height)
1545 	/* careful: gui_resize_shell() may postpone the resize again if we
1546 	 * were called indirectly by it */
1547 	gui_resize_shell(new_pixel_width, new_pixel_height);
1548 }
1549 
1550     int
1551 gui_get_shellsize(void)
1552 {
1553     Rows = gui.num_rows;
1554     Columns = gui.num_cols;
1555     return OK;
1556 }
1557 
1558 /*
1559  * Set the size of the Vim shell according to Rows and Columns.
1560  * If "fit_to_display" is TRUE then the size may be reduced to fit the window
1561  * on the screen.
1562  * When "mustset" is TRUE the size was set by the user. When FALSE a UI
1563  * component was added or removed (e.g., a scrollbar).
1564  */
1565     void
1566 gui_set_shellsize(
1567     int		mustset UNUSED,
1568     int		fit_to_display,
1569     int		direction)		/* RESIZE_HOR, RESIZE_VER */
1570 {
1571     int		base_width;
1572     int		base_height;
1573     int		width;
1574     int		height;
1575     int		min_width;
1576     int		min_height;
1577     int		screen_w;
1578     int		screen_h;
1579 #ifdef FEAT_GUI_GTK
1580     int		un_maximize = mustset;
1581     int		did_adjust = 0;
1582 #endif
1583     int		x = -1, y = -1;
1584 
1585     if (!gui.shell_created)
1586 	return;
1587 
1588 #if defined(MSWIN) || defined(FEAT_GUI_GTK)
1589     /* If not setting to a user specified size and maximized, calculate the
1590      * number of characters that fit in the maximized window. */
1591     if (!mustset && (vim_strchr(p_go, GO_KEEPWINSIZE) != NULL
1592 						       || gui_mch_maximized()))
1593     {
1594 	gui_mch_newfont();
1595 	return;
1596     }
1597 #endif
1598 
1599     base_width = gui_get_base_width();
1600     base_height = gui_get_base_height();
1601     if (fit_to_display)
1602 	/* Remember the original window position. */
1603 	(void)gui_mch_get_winpos(&x, &y);
1604 
1605 #ifdef USE_SUN_WORKSHOP
1606     if (!mustset && usingSunWorkShop
1607 				&& workshop_get_width_height(&width, &height))
1608     {
1609 	Columns = (width - base_width + gui.char_width - 1) / gui.char_width;
1610 	Rows = (height - base_height + gui.char_height - 1) / gui.char_height;
1611     }
1612     else
1613 #endif
1614     {
1615 	width = Columns * gui.char_width + base_width;
1616 	height = Rows * gui.char_height + base_height;
1617     }
1618 
1619     if (fit_to_display)
1620     {
1621 	gui_mch_get_screen_dimensions(&screen_w, &screen_h);
1622 	if ((direction & RESIZE_HOR) && width > screen_w)
1623 	{
1624 	    Columns = (screen_w - base_width) / gui.char_width;
1625 	    if (Columns < MIN_COLUMNS)
1626 		Columns = MIN_COLUMNS;
1627 	    width = Columns * gui.char_width + base_width;
1628 #ifdef FEAT_GUI_GTK
1629 	    ++did_adjust;
1630 #endif
1631 	}
1632 	if ((direction & RESIZE_VERT) && height > screen_h)
1633 	{
1634 	    Rows = (screen_h - base_height) / gui.char_height;
1635 	    check_shellsize();
1636 	    height = Rows * gui.char_height + base_height;
1637 #ifdef FEAT_GUI_GTK
1638 	    ++did_adjust;
1639 #endif
1640 	}
1641 #ifdef FEAT_GUI_GTK
1642 	if (did_adjust == 2 || (width + gui.char_width >= screen_w
1643 				     && height + gui.char_height >= screen_h))
1644 	    /* don't unmaximize if at maximum size */
1645 	    un_maximize = FALSE;
1646 #endif
1647     }
1648     limit_screen_size();
1649     gui.num_cols = Columns;
1650     gui.num_rows = Rows;
1651 
1652     min_width = base_width + MIN_COLUMNS * gui.char_width;
1653     min_height = base_height + MIN_LINES * gui.char_height;
1654     min_height += tabline_height() * gui.char_height;
1655 
1656 #ifdef FEAT_GUI_GTK
1657     if (un_maximize)
1658     {
1659 	/* If the window size is smaller than the screen unmaximize the
1660 	 * window, otherwise resizing won't work. */
1661 	gui_mch_get_screen_dimensions(&screen_w, &screen_h);
1662 	if ((width + gui.char_width < screen_w
1663 				   || height + gui.char_height * 2 < screen_h)
1664 		&& gui_mch_maximized())
1665 	    gui_mch_unmaximize();
1666     }
1667 #endif
1668 
1669     gui_mch_set_shellsize(width, height, min_width, min_height,
1670 					  base_width, base_height, direction);
1671 
1672     if (fit_to_display && x >= 0 && y >= 0)
1673     {
1674 	/* Some window managers put the Vim window left of/above the screen.
1675 	 * Only change the position if it wasn't already negative before
1676 	 * (happens on MS-Windows with a secondary monitor). */
1677 	gui_mch_update();
1678 	if (gui_mch_get_winpos(&x, &y) == OK && (x < 0 || y < 0))
1679 	    gui_mch_set_winpos(x < 0 ? 0 : x, y < 0 ? 0 : y);
1680     }
1681 
1682     gui_position_components(width);
1683     gui_update_scrollbars(TRUE);
1684     gui_reset_scroll_region();
1685 }
1686 
1687 /*
1688  * Called when Rows and/or Columns has changed.
1689  */
1690     void
1691 gui_new_shellsize(void)
1692 {
1693     gui_reset_scroll_region();
1694 }
1695 
1696 /*
1697  * Make scroll region cover whole screen.
1698  */
1699     void
1700 gui_reset_scroll_region(void)
1701 {
1702     gui.scroll_region_top = 0;
1703     gui.scroll_region_bot = gui.num_rows - 1;
1704     gui.scroll_region_left = 0;
1705     gui.scroll_region_right = gui.num_cols - 1;
1706 }
1707 
1708     void
1709 gui_start_highlight(int mask)
1710 {
1711     if (mask > HL_ALL)		    /* highlight code */
1712 	gui.highlight_mask = mask;
1713     else			    /* mask */
1714 	gui.highlight_mask |= mask;
1715 }
1716 
1717     void
1718 gui_stop_highlight(int mask)
1719 {
1720     if (mask > HL_ALL)		    /* highlight code */
1721 	gui.highlight_mask = HL_NORMAL;
1722     else			    /* mask */
1723 	gui.highlight_mask &= ~mask;
1724 }
1725 
1726 /*
1727  * Clear a rectangular region of the screen from text pos (row1, col1) to
1728  * (row2, col2) inclusive.
1729  */
1730     void
1731 gui_clear_block(
1732     int	    row1,
1733     int	    col1,
1734     int	    row2,
1735     int	    col2)
1736 {
1737     /* Clear the selection if we are about to write over it */
1738     clip_may_clear_selection(row1, row2);
1739 
1740     gui_mch_clear_block(row1, col1, row2, col2);
1741 
1742     /* Invalidate cursor if it was in this block */
1743     if (       gui.cursor_row >= row1 && gui.cursor_row <= row2
1744 	    && gui.cursor_col >= col1 && gui.cursor_col <= col2)
1745 	gui.cursor_is_valid = FALSE;
1746 }
1747 
1748 /*
1749  * Write code to update the cursor later.  This avoids the need to flush the
1750  * output buffer before calling gui_update_cursor().
1751  */
1752     void
1753 gui_update_cursor_later(void)
1754 {
1755     OUT_STR(IF_EB("\033|s", ESC_STR "|s"));
1756 }
1757 
1758     void
1759 gui_write(
1760     char_u	*s,
1761     int		len)
1762 {
1763     char_u	*p;
1764     int		arg1 = 0, arg2 = 0;
1765     int		force_cursor = FALSE;	/* force cursor update */
1766     int		force_scrollbar = FALSE;
1767     static win_T	*old_curwin = NULL;
1768 
1769 /* #define DEBUG_GUI_WRITE */
1770 #ifdef DEBUG_GUI_WRITE
1771     {
1772 	int i;
1773 	char_u *str;
1774 
1775 	printf("gui_write(%d):\n    ", len);
1776 	for (i = 0; i < len; i++)
1777 	    if (s[i] == ESC)
1778 	    {
1779 		if (i != 0)
1780 		    printf("\n    ");
1781 		printf("<ESC>");
1782 	    }
1783 	    else
1784 	    {
1785 		str = transchar_byte(s[i]);
1786 		if (str[0] && str[1])
1787 		    printf("<%s>", (char *)str);
1788 		else
1789 		    printf("%s", (char *)str);
1790 	    }
1791 	printf("\n");
1792     }
1793 #endif
1794     while (len)
1795     {
1796 	if (s[0] == ESC && s[1] == '|')
1797 	{
1798 	    p = s + 2;
1799 	    if (VIM_ISDIGIT(*p) || (*p == '-' && VIM_ISDIGIT(*(p + 1))))
1800 	    {
1801 		arg1 = getdigits(&p);
1802 		if (p > s + len)
1803 		    break;
1804 		if (*p == ';')
1805 		{
1806 		    ++p;
1807 		    arg2 = getdigits(&p);
1808 		    if (p > s + len)
1809 			break;
1810 		}
1811 	    }
1812 	    switch (*p)
1813 	    {
1814 		case 'C':	/* Clear screen */
1815 		    clip_scroll_selection(9999);
1816 		    gui_mch_clear_all();
1817 		    gui.cursor_is_valid = FALSE;
1818 		    force_scrollbar = TRUE;
1819 		    break;
1820 		case 'M':	/* Move cursor */
1821 		    gui_set_cursor(arg1, arg2);
1822 		    break;
1823 		case 's':	/* force cursor (shape) update */
1824 		    force_cursor = TRUE;
1825 		    break;
1826 		case 'R':	/* Set scroll region */
1827 		    if (arg1 < arg2)
1828 		    {
1829 			gui.scroll_region_top = arg1;
1830 			gui.scroll_region_bot = arg2;
1831 		    }
1832 		    else
1833 		    {
1834 			gui.scroll_region_top = arg2;
1835 			gui.scroll_region_bot = arg1;
1836 		    }
1837 		    break;
1838 		case 'V':	/* Set vertical scroll region */
1839 		    if (arg1 < arg2)
1840 		    {
1841 			gui.scroll_region_left = arg1;
1842 			gui.scroll_region_right = arg2;
1843 		    }
1844 		    else
1845 		    {
1846 			gui.scroll_region_left = arg2;
1847 			gui.scroll_region_right = arg1;
1848 		    }
1849 		    break;
1850 		case 'd':	/* Delete line */
1851 		    gui_delete_lines(gui.row, 1);
1852 		    break;
1853 		case 'D':	/* Delete lines */
1854 		    gui_delete_lines(gui.row, arg1);
1855 		    break;
1856 		case 'i':	/* Insert line */
1857 		    gui_insert_lines(gui.row, 1);
1858 		    break;
1859 		case 'I':	/* Insert lines */
1860 		    gui_insert_lines(gui.row, arg1);
1861 		    break;
1862 		case '$':	/* Clear to end-of-line */
1863 		    gui_clear_block(gui.row, gui.col, gui.row,
1864 							    (int)Columns - 1);
1865 		    break;
1866 		case 'h':	/* Turn on highlighting */
1867 		    gui_start_highlight(arg1);
1868 		    break;
1869 		case 'H':	/* Turn off highlighting */
1870 		    gui_stop_highlight(arg1);
1871 		    break;
1872 		case 'f':	/* flash the window (visual bell) */
1873 		    gui_mch_flash(arg1 == 0 ? 20 : arg1);
1874 		    break;
1875 		default:
1876 		    p = s + 1;	/* Skip the ESC */
1877 		    break;
1878 	    }
1879 	    len -= (int)(++p - s);
1880 	    s = p;
1881 	}
1882 	else if (
1883 #ifdef EBCDIC
1884 		CtrlChar(s[0]) != 0	/* Ctrl character */
1885 #else
1886 		s[0] < 0x20		/* Ctrl character */
1887 #endif
1888 #ifdef FEAT_SIGN_ICONS
1889 		&& s[0] != SIGN_BYTE
1890 # ifdef FEAT_NETBEANS_INTG
1891 		&& s[0] != MULTISIGN_BYTE
1892 # endif
1893 #endif
1894 		)
1895 	{
1896 	    if (s[0] == '\n')		/* NL */
1897 	    {
1898 		gui.col = 0;
1899 		if (gui.row < gui.scroll_region_bot)
1900 		    gui.row++;
1901 		else
1902 		    gui_delete_lines(gui.scroll_region_top, 1);
1903 	    }
1904 	    else if (s[0] == '\r')	/* CR */
1905 	    {
1906 		gui.col = 0;
1907 	    }
1908 	    else if (s[0] == '\b')	/* Backspace */
1909 	    {
1910 		if (gui.col)
1911 		    --gui.col;
1912 	    }
1913 	    else if (s[0] == Ctrl_L)	/* cursor-right */
1914 	    {
1915 		++gui.col;
1916 	    }
1917 	    else if (s[0] == Ctrl_G)	/* Beep */
1918 	    {
1919 		gui_mch_beep();
1920 	    }
1921 	    /* Other Ctrl character: shouldn't happen! */
1922 
1923 	    --len;	/* Skip this char */
1924 	    ++s;
1925 	}
1926 	else
1927 	{
1928 	    p = s;
1929 	    while (len > 0 && (
1930 #ifdef EBCDIC
1931 			CtrlChar(*p) == 0
1932 #else
1933 			*p >= 0x20
1934 #endif
1935 #ifdef FEAT_SIGN_ICONS
1936 			|| *p == SIGN_BYTE
1937 # ifdef FEAT_NETBEANS_INTG
1938 			|| *p == MULTISIGN_BYTE
1939 # endif
1940 #endif
1941 			))
1942 	    {
1943 		len--;
1944 		p++;
1945 	    }
1946 	    gui_outstr(s, (int)(p - s));
1947 	    s = p;
1948 	}
1949     }
1950 
1951     /* Postponed update of the cursor (won't work if "can_update_cursor" isn't
1952      * set). */
1953     if (force_cursor)
1954 	gui_update_cursor(TRUE, TRUE);
1955 
1956     /* When switching to another window the dragging must have stopped.
1957      * Required for GTK, dragged_sb isn't reset. */
1958     if (old_curwin != curwin)
1959 	gui.dragged_sb = SBAR_NONE;
1960 
1961     /* Update the scrollbars after clearing the screen or when switched
1962      * to another window.
1963      * Update the horizontal scrollbar always, it's difficult to check all
1964      * situations where it might change. */
1965     if (force_scrollbar || old_curwin != curwin)
1966 	gui_update_scrollbars(force_scrollbar);
1967     else
1968 	gui_update_horiz_scrollbar(FALSE);
1969     old_curwin = curwin;
1970 
1971     /*
1972      * We need to make sure this is cleared since Athena doesn't tell us when
1973      * he is done dragging.  Do the same for GTK.
1974      */
1975 #if defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_GTK)
1976     gui.dragged_sb = SBAR_NONE;
1977 #endif
1978 
1979     gui_mch_flush();		    /* In case vim decides to take a nap */
1980 }
1981 
1982 /*
1983  * When ScreenLines[] is invalid, updating the cursor should not be done, it
1984  * produces wrong results.  Call gui_dont_update_cursor() before that code and
1985  * gui_can_update_cursor() afterwards.
1986  */
1987     void
1988 gui_dont_update_cursor(int undraw)
1989 {
1990     if (gui.in_use)
1991     {
1992 	/* Undraw the cursor now, we probably can't do it after the change. */
1993 	if (undraw)
1994 	    gui_undraw_cursor();
1995 	can_update_cursor = FALSE;
1996     }
1997 }
1998 
1999     void
2000 gui_can_update_cursor(void)
2001 {
2002     can_update_cursor = TRUE;
2003     /* No need to update the cursor right now, there is always more output
2004      * after scrolling. */
2005 }
2006 
2007     static void
2008 gui_outstr(char_u *s, int len)
2009 {
2010     int	    this_len;
2011 #ifdef FEAT_MBYTE
2012     int	    cells;
2013 #endif
2014 
2015     if (len == 0)
2016 	return;
2017 
2018     if (len < 0)
2019 	len = (int)STRLEN(s);
2020 
2021     while (len > 0)
2022     {
2023 #ifdef FEAT_MBYTE
2024 	if (has_mbyte)
2025 	{
2026 	    /* Find out how many chars fit in the current line. */
2027 	    cells = 0;
2028 	    for (this_len = 0; this_len < len; )
2029 	    {
2030 		cells += (*mb_ptr2cells)(s + this_len);
2031 		if (gui.col + cells > Columns)
2032 		    break;
2033 		this_len += (*mb_ptr2len)(s + this_len);
2034 	    }
2035 	    if (this_len > len)
2036 		this_len = len;	    /* don't include following composing char */
2037 	}
2038 	else
2039 #endif
2040 	    if (gui.col + len > Columns)
2041 	    this_len = Columns - gui.col;
2042 	else
2043 	    this_len = len;
2044 
2045 	(void)gui_outstr_nowrap(s, this_len,
2046 					  0, (guicolor_T)0, (guicolor_T)0, 0);
2047 	s += this_len;
2048 	len -= this_len;
2049 #ifdef FEAT_MBYTE
2050 	/* fill up for a double-width char that doesn't fit. */
2051 	if (len > 0 && gui.col < Columns)
2052 	    (void)gui_outstr_nowrap((char_u *)" ", 1,
2053 					  0, (guicolor_T)0, (guicolor_T)0, 0);
2054 #endif
2055 	/* The cursor may wrap to the next line. */
2056 	if (gui.col >= Columns)
2057 	{
2058 	    gui.col = 0;
2059 	    gui.row++;
2060 	}
2061     }
2062 }
2063 
2064 /*
2065  * Output one character (may be one or two display cells).
2066  * Caller must check for valid "off".
2067  * Returns FAIL or OK, just like gui_outstr_nowrap().
2068  */
2069     static int
2070 gui_screenchar(
2071     int		off,	    /* Offset from start of screen */
2072     int		flags,
2073     guicolor_T	fg,	    /* colors for cursor */
2074     guicolor_T	bg,	    /* colors for cursor */
2075     int		back)	    /* backup this many chars when using bold trick */
2076 {
2077 #ifdef FEAT_MBYTE
2078     char_u	buf[MB_MAXBYTES + 1];
2079 
2080     /* Don't draw right halve of a double-width UTF-8 char. "cannot happen" */
2081     if (enc_utf8 && ScreenLines[off] == 0)
2082 	return OK;
2083 
2084     if (enc_utf8 && ScreenLinesUC[off] != 0)
2085 	/* Draw UTF-8 multi-byte character. */
2086 	return gui_outstr_nowrap(buf, utfc_char2bytes(off, buf),
2087 							 flags, fg, bg, back);
2088 
2089     if (enc_dbcs == DBCS_JPNU && ScreenLines[off] == 0x8e)
2090     {
2091 	buf[0] = ScreenLines[off];
2092 	buf[1] = ScreenLines2[off];
2093 	return gui_outstr_nowrap(buf, 2, flags, fg, bg, back);
2094     }
2095 
2096     /* Draw non-multi-byte character or DBCS character. */
2097     return gui_outstr_nowrap(ScreenLines + off,
2098 	    enc_dbcs ? (*mb_ptr2len)(ScreenLines + off) : 1,
2099 							 flags, fg, bg, back);
2100 #else
2101     return gui_outstr_nowrap(ScreenLines + off, 1, flags, fg, bg, back);
2102 #endif
2103 }
2104 
2105 #ifdef FEAT_GUI_GTK
2106 /*
2107  * Output the string at the given screen position.  This is used in place
2108  * of gui_screenchar() where possible because Pango needs as much context
2109  * as possible to work nicely.  It's a lot faster as well.
2110  */
2111     static int
2112 gui_screenstr(
2113     int		off,	    /* Offset from start of screen */
2114     int		len,	    /* string length in screen cells */
2115     int		flags,
2116     guicolor_T	fg,	    /* colors for cursor */
2117     guicolor_T	bg,	    /* colors for cursor */
2118     int		back)	    /* backup this many chars when using bold trick */
2119 {
2120     char_u  *buf;
2121     int	    outlen = 0;
2122     int	    i;
2123     int	    retval;
2124 
2125     if (len <= 0) /* "cannot happen"? */
2126 	return OK;
2127 
2128     if (enc_utf8)
2129     {
2130 	buf = alloc((unsigned)(len * MB_MAXBYTES + 1));
2131 	if (buf == NULL)
2132 	    return OK; /* not much we could do here... */
2133 
2134 	for (i = off; i < off + len; ++i)
2135 	{
2136 	    if (ScreenLines[i] == 0)
2137 		continue; /* skip second half of double-width char */
2138 
2139 	    if (ScreenLinesUC[i] == 0)
2140 		buf[outlen++] = ScreenLines[i];
2141 	    else
2142 		outlen += utfc_char2bytes(i, buf + outlen);
2143 	}
2144 
2145 	buf[outlen] = NUL; /* only to aid debugging */
2146 	retval = gui_outstr_nowrap(buf, outlen, flags, fg, bg, back);
2147 	vim_free(buf);
2148 
2149 	return retval;
2150     }
2151     else if (enc_dbcs == DBCS_JPNU)
2152     {
2153 	buf = alloc((unsigned)(len * 2 + 1));
2154 	if (buf == NULL)
2155 	    return OK; /* not much we could do here... */
2156 
2157 	for (i = off; i < off + len; ++i)
2158 	{
2159 	    buf[outlen++] = ScreenLines[i];
2160 
2161 	    /* handle double-byte single-width char */
2162 	    if (ScreenLines[i] == 0x8e)
2163 		buf[outlen++] = ScreenLines2[i];
2164 	    else if (MB_BYTE2LEN(ScreenLines[i]) == 2)
2165 		buf[outlen++] = ScreenLines[++i];
2166 	}
2167 
2168 	buf[outlen] = NUL; /* only to aid debugging */
2169 	retval = gui_outstr_nowrap(buf, outlen, flags, fg, bg, back);
2170 	vim_free(buf);
2171 
2172 	return retval;
2173     }
2174     else
2175     {
2176 	return gui_outstr_nowrap(&ScreenLines[off], len,
2177 				 flags, fg, bg, back);
2178     }
2179 }
2180 #endif /* FEAT_GUI_GTK */
2181 
2182 /*
2183  * Output the given string at the current cursor position.  If the string is
2184  * too long to fit on the line, then it is truncated.
2185  * "flags":
2186  * GUI_MON_IS_CURSOR should only be used when this function is being called to
2187  * actually draw (an inverted) cursor.
2188  * GUI_MON_TRS_CURSOR is used to draw the cursor text with a transparent
2189  * background.
2190  * GUI_MON_NOCLEAR is used to avoid clearing the selection when drawing over
2191  * it.
2192  * Returns OK, unless "back" is non-zero and using the bold trick, then return
2193  * FAIL (the caller should start drawing "back" chars back).
2194  */
2195     int
2196 gui_outstr_nowrap(
2197     char_u	*s,
2198     int		len,
2199     int		flags,
2200     guicolor_T	fg,	    /* colors for cursor */
2201     guicolor_T	bg,	    /* colors for cursor */
2202     int		back)	    /* backup this many chars when using bold trick */
2203 {
2204     long_u	highlight_mask;
2205     long_u	hl_mask_todo;
2206     guicolor_T	fg_color;
2207     guicolor_T	bg_color;
2208     guicolor_T	sp_color;
2209 #if !defined(FEAT_GUI_GTK)
2210     GuiFont	font = NOFONT;
2211 # ifdef FEAT_MBYTE
2212     GuiFont	wide_font = NOFONT;
2213 # endif
2214 # ifdef FEAT_XFONTSET
2215     GuiFontset	fontset = NOFONTSET;
2216 # endif
2217 #endif
2218     attrentry_T	*aep = NULL;
2219     int		draw_flags;
2220     int		col = gui.col;
2221 #ifdef FEAT_SIGN_ICONS
2222     int		draw_sign = FALSE;
2223 # ifdef FEAT_NETBEANS_INTG
2224     int		multi_sign = FALSE;
2225 # endif
2226 #endif
2227 
2228     if (len < 0)
2229 	len = (int)STRLEN(s);
2230     if (len == 0)
2231 	return OK;
2232 
2233 #ifdef FEAT_SIGN_ICONS
2234     if (*s == SIGN_BYTE
2235 # ifdef FEAT_NETBEANS_INTG
2236 	  || *s == MULTISIGN_BYTE
2237 # endif
2238     )
2239     {
2240 # ifdef FEAT_NETBEANS_INTG
2241 	if (*s == MULTISIGN_BYTE)
2242 	    multi_sign = TRUE;
2243 # endif
2244 	/* draw spaces instead */
2245 	s = (char_u *)"  ";
2246 	if (len == 1 && col > 0)
2247 	    --col;
2248 	len = 2;
2249 	draw_sign = TRUE;
2250 	highlight_mask = 0;
2251     }
2252     else
2253 #endif
2254     if (gui.highlight_mask > HL_ALL)
2255     {
2256 	aep = syn_gui_attr2entry(gui.highlight_mask);
2257 	if (aep == NULL)	    /* highlighting not set */
2258 	    highlight_mask = 0;
2259 	else
2260 	    highlight_mask = aep->ae_attr;
2261     }
2262     else
2263 	highlight_mask = gui.highlight_mask;
2264     hl_mask_todo = highlight_mask;
2265 
2266 #if !defined(FEAT_GUI_GTK)
2267     /* Set the font */
2268     if (aep != NULL && aep->ae_u.gui.font != NOFONT)
2269 	font = aep->ae_u.gui.font;
2270 # ifdef FEAT_XFONTSET
2271     else if (aep != NULL && aep->ae_u.gui.fontset != NOFONTSET)
2272 	fontset = aep->ae_u.gui.fontset;
2273 # endif
2274     else
2275     {
2276 # ifdef FEAT_XFONTSET
2277 	if (gui.fontset != NOFONTSET)
2278 	    fontset = gui.fontset;
2279 	else
2280 # endif
2281 	    if (hl_mask_todo & (HL_BOLD | HL_STANDOUT))
2282 	{
2283 	    if ((hl_mask_todo & HL_ITALIC) && gui.boldital_font != NOFONT)
2284 	    {
2285 		font = gui.boldital_font;
2286 		hl_mask_todo &= ~(HL_BOLD | HL_STANDOUT | HL_ITALIC);
2287 	    }
2288 	    else if (gui.bold_font != NOFONT)
2289 	    {
2290 		font = gui.bold_font;
2291 		hl_mask_todo &= ~(HL_BOLD | HL_STANDOUT);
2292 	    }
2293 	    else
2294 		font = gui.norm_font;
2295 	}
2296 	else if ((hl_mask_todo & HL_ITALIC) && gui.ital_font != NOFONT)
2297 	{
2298 	    font = gui.ital_font;
2299 	    hl_mask_todo &= ~HL_ITALIC;
2300 	}
2301 	else
2302 	    font = gui.norm_font;
2303 
2304 # ifdef FEAT_MBYTE
2305 	/*
2306 	 * Choose correct wide_font by font.  wide_font should be set with font
2307 	 * at same time in above block.  But it will make many "ifdef" nasty
2308 	 * blocks.  So we do it here.
2309 	 */
2310 	if (font == gui.boldital_font && gui.wide_boldital_font)
2311 	    wide_font = gui.wide_boldital_font;
2312 	else if (font == gui.bold_font && gui.wide_bold_font)
2313 	    wide_font = gui.wide_bold_font;
2314 	else if (font == gui.ital_font && gui.wide_ital_font)
2315 	    wide_font = gui.wide_ital_font;
2316 	else if (font == gui.norm_font && gui.wide_font)
2317 	    wide_font = gui.wide_font;
2318 # endif
2319 
2320     }
2321 # ifdef FEAT_XFONTSET
2322     if (fontset != NOFONTSET)
2323 	gui_mch_set_fontset(fontset);
2324     else
2325 # endif
2326 	gui_mch_set_font(font);
2327 #endif
2328 
2329     draw_flags = 0;
2330 
2331     /* Set the color */
2332     bg_color = gui.back_pixel;
2333     if ((flags & GUI_MON_IS_CURSOR) && gui.in_focus)
2334     {
2335 	draw_flags |= DRAW_CURSOR;
2336 	fg_color = fg;
2337 	bg_color = bg;
2338 	sp_color = fg;
2339     }
2340     else if (aep != NULL)
2341     {
2342 	fg_color = aep->ae_u.gui.fg_color;
2343 	if (fg_color == INVALCOLOR)
2344 	    fg_color = gui.norm_pixel;
2345 	bg_color = aep->ae_u.gui.bg_color;
2346 	if (bg_color == INVALCOLOR)
2347 	    bg_color = gui.back_pixel;
2348 	sp_color = aep->ae_u.gui.sp_color;
2349 	if (sp_color == INVALCOLOR)
2350 	    sp_color = fg_color;
2351     }
2352     else
2353     {
2354 	fg_color = gui.norm_pixel;
2355 	sp_color = fg_color;
2356     }
2357 
2358     if (highlight_mask & (HL_INVERSE | HL_STANDOUT))
2359     {
2360 #if defined(AMIGA)
2361 	gui_mch_set_colors(bg_color, fg_color);
2362 #else
2363 	gui_mch_set_fg_color(bg_color);
2364 	gui_mch_set_bg_color(fg_color);
2365 #endif
2366     }
2367     else
2368     {
2369 #if defined(AMIGA)
2370 	gui_mch_set_colors(fg_color, bg_color);
2371 #else
2372 	gui_mch_set_fg_color(fg_color);
2373 	gui_mch_set_bg_color(bg_color);
2374 #endif
2375     }
2376     gui_mch_set_sp_color(sp_color);
2377 
2378     /* Clear the selection if we are about to write over it */
2379     if (!(flags & GUI_MON_NOCLEAR))
2380 	clip_may_clear_selection(gui.row, gui.row);
2381 
2382 
2383     /* If there's no bold font, then fake it */
2384     if (hl_mask_todo & (HL_BOLD | HL_STANDOUT))
2385 	draw_flags |= DRAW_BOLD;
2386 
2387     /*
2388      * When drawing bold or italic characters the spill-over from the left
2389      * neighbor may be destroyed.  Let the caller backup to start redrawing
2390      * just after a blank.
2391      */
2392     if (back != 0 && ((draw_flags & DRAW_BOLD) || (highlight_mask & HL_ITALIC)))
2393 	return FAIL;
2394 
2395 #if defined(FEAT_GUI_GTK)
2396     /* If there's no italic font, then fake it.
2397      * For GTK2, we don't need a different font for italic style. */
2398     if (hl_mask_todo & HL_ITALIC)
2399 	draw_flags |= DRAW_ITALIC;
2400 
2401     /* Do we underline the text? */
2402     if (hl_mask_todo & HL_UNDERLINE)
2403 	draw_flags |= DRAW_UNDERL;
2404 
2405 #else
2406     /* Do we underline the text? */
2407     if ((hl_mask_todo & HL_UNDERLINE) || (hl_mask_todo & HL_ITALIC))
2408 	draw_flags |= DRAW_UNDERL;
2409 #endif
2410     /* Do we undercurl the text? */
2411     if (hl_mask_todo & HL_UNDERCURL)
2412 	draw_flags |= DRAW_UNDERC;
2413 
2414     /* Do we strikethrough the text? */
2415     if (hl_mask_todo & HL_STRIKETHROUGH)
2416 	draw_flags |= DRAW_STRIKE;
2417 
2418     /* Do we draw transparently? */
2419     if (flags & GUI_MON_TRS_CURSOR)
2420 	draw_flags |= DRAW_TRANSP;
2421 
2422     /*
2423      * Draw the text.
2424      */
2425 #ifdef FEAT_GUI_GTK
2426     /* The value returned is the length in display cells */
2427     len = gui_gtk2_draw_string(gui.row, col, s, len, draw_flags);
2428 #else
2429 # ifdef FEAT_MBYTE
2430     if (enc_utf8)
2431     {
2432 	int	start;		/* index of bytes to be drawn */
2433 	int	cells;		/* cellwidth of bytes to be drawn */
2434 	int	thislen;	/* length of bytes to be drawn */
2435 	int	cn;		/* cellwidth of current char */
2436 	int	i;		/* index of current char */
2437 	int	c;		/* current char value */
2438 	int	cl;		/* byte length of current char */
2439 	int	comping;	/* current char is composing */
2440 	int	scol = col;	/* screen column */
2441 	int	curr_wide = FALSE;  /* use 'guifontwide' */
2442 	int	prev_wide = FALSE;
2443 	int	wide_changed;
2444 #  ifdef WIN3264
2445 	int	sep_comp = FALSE;   /* Don't separate composing chars. */
2446 #  else
2447 	int	sep_comp = TRUE;    /* Separate composing chars. */
2448 #  endif
2449 
2450 	/* Break the string at a composing character, it has to be drawn on
2451 	 * top of the previous character. */
2452 	start = 0;
2453 	cells = 0;
2454 	for (i = 0; i < len; i += cl)
2455 	{
2456 	    c = utf_ptr2char(s + i);
2457 	    cn = utf_char2cells(c);
2458 	    comping = utf_iscomposing(c);
2459 	    if (!comping)	/* count cells from non-composing chars */
2460 		cells += cn;
2461 	    if (!comping || sep_comp)
2462 	    {
2463 		if (cn > 1
2464 #  ifdef FEAT_XFONTSET
2465 			&& fontset == NOFONTSET
2466 #  endif
2467 			&& wide_font != NOFONT)
2468 		    curr_wide = TRUE;
2469 		else
2470 		    curr_wide = FALSE;
2471 	    }
2472 	    cl = utf_ptr2len(s + i);
2473 	    if (cl == 0)	/* hit end of string */
2474 		len = i + cl;	/* len must be wrong "cannot happen" */
2475 
2476 	    wide_changed = curr_wide != prev_wide;
2477 
2478 	    /* Print the string so far if it's the last character or there is
2479 	     * a composing character. */
2480 	    if (i + cl >= len || (comping && sep_comp && i > start)
2481 		    || wide_changed
2482 #  if defined(FEAT_GUI_X11)
2483 		    || (cn > 1
2484 #   ifdef FEAT_XFONTSET
2485 			/* No fontset: At least draw char after wide char at
2486 			 * right position. */
2487 			&& fontset == NOFONTSET
2488 #   endif
2489 		       )
2490 #  endif
2491 	       )
2492 	    {
2493 		if ((comping && sep_comp) || wide_changed)
2494 		    thislen = i - start;
2495 		else
2496 		    thislen = i - start + cl;
2497 		if (thislen > 0)
2498 		{
2499 		    if (prev_wide)
2500 			gui_mch_set_font(wide_font);
2501 		    gui_mch_draw_string(gui.row, scol, s + start, thislen,
2502 								  draw_flags);
2503 		    if (prev_wide)
2504 			gui_mch_set_font(font);
2505 		    start += thislen;
2506 		}
2507 		scol += cells;
2508 		cells = 0;
2509 		/* Adjust to not draw a character which width is changed
2510 		 * against with last one. */
2511 		if (wide_changed && !(comping && sep_comp))
2512 		{
2513 		    scol -= cn;
2514 		    cl = 0;
2515 		}
2516 
2517 #  if defined(FEAT_GUI_X11)
2518 		/* No fontset: draw a space to fill the gap after a wide char
2519 		 * */
2520 		if (cn > 1 && (draw_flags & DRAW_TRANSP) == 0
2521 #   ifdef FEAT_XFONTSET
2522 			&& fontset == NOFONTSET
2523 #   endif
2524 			&& !wide_changed)
2525 		    gui_mch_draw_string(gui.row, scol - 1, (char_u *)" ",
2526 							       1, draw_flags);
2527 #  endif
2528 	    }
2529 	    /* Draw a composing char on top of the previous char. */
2530 	    if (comping && sep_comp)
2531 	    {
2532 #  if defined(__APPLE_CC__) && TARGET_API_MAC_CARBON
2533 		/* Carbon ATSUI autodraws composing char over previous char */
2534 		gui_mch_draw_string(gui.row, scol, s + i, cl,
2535 						    draw_flags | DRAW_TRANSP);
2536 #  else
2537 		gui_mch_draw_string(gui.row, scol - cn, s + i, cl,
2538 						    draw_flags | DRAW_TRANSP);
2539 #  endif
2540 		start = i + cl;
2541 	    }
2542 	    prev_wide = curr_wide;
2543 	}
2544 	/* The stuff below assumes "len" is the length in screen columns. */
2545 	len = scol - col;
2546     }
2547     else
2548 # endif
2549     {
2550 	gui_mch_draw_string(gui.row, col, s, len, draw_flags);
2551 # ifdef FEAT_MBYTE
2552 	if (enc_dbcs == DBCS_JPNU)
2553 	{
2554 	    /* Get the length in display cells, this can be different from the
2555 	     * number of bytes for "euc-jp". */
2556 	    len = mb_string2cells(s, len);
2557 	}
2558 # endif
2559     }
2560 #endif /* !FEAT_GUI_GTK */
2561 
2562     if (!(flags & (GUI_MON_IS_CURSOR | GUI_MON_TRS_CURSOR)))
2563 	gui.col = col + len;
2564 
2565     /* May need to invert it when it's part of the selection. */
2566     if (flags & GUI_MON_NOCLEAR)
2567 	clip_may_redraw_selection(gui.row, col, len);
2568 
2569     if (!(flags & (GUI_MON_IS_CURSOR | GUI_MON_TRS_CURSOR)))
2570     {
2571 	/* Invalidate the old physical cursor position if we wrote over it */
2572 	if (gui.cursor_row == gui.row
2573 		&& gui.cursor_col >= col
2574 		&& gui.cursor_col < col + len)
2575 	    gui.cursor_is_valid = FALSE;
2576     }
2577 
2578 #ifdef FEAT_SIGN_ICONS
2579     if (draw_sign)
2580 	/* Draw the sign on top of the spaces. */
2581 	gui_mch_drawsign(gui.row, col, gui.highlight_mask);
2582 # if defined(FEAT_NETBEANS_INTG) && (defined(FEAT_GUI_X11) \
2583 	|| defined(FEAT_GUI_GTK) || defined(FEAT_GUI_W32))
2584     if (multi_sign)
2585 	netbeans_draw_multisign_indicator(gui.row);
2586 # endif
2587 #endif
2588 
2589     return OK;
2590 }
2591 
2592 /*
2593  * Un-draw the cursor.	Actually this just redraws the character at the given
2594  * position.  The character just before it too, for when it was in bold.
2595  */
2596     void
2597 gui_undraw_cursor(void)
2598 {
2599     if (gui.cursor_is_valid)
2600     {
2601 #ifdef FEAT_HANGULIN
2602 	if (composing_hangul
2603 		    && gui.col == gui.cursor_col && gui.row == gui.cursor_row)
2604 	{
2605 	    char_u *comp_buf;
2606 	    int comp_len;
2607 
2608 	    comp_buf = hangul_composing_buffer_get(&comp_len);
2609 	    if (comp_buf)
2610 	    {
2611 		(void)gui_outstr_nowrap(comp_buf, comp_len,
2612 					GUI_MON_IS_CURSOR | GUI_MON_NOCLEAR,
2613 					gui.norm_pixel, gui.back_pixel, 0);
2614 		vim_free(comp_buf);
2615 	    }
2616 	}
2617 	else
2618 	{
2619 #endif
2620 	if (gui_redraw_block(gui.cursor_row, gui.cursor_col,
2621 			      gui.cursor_row, gui.cursor_col, GUI_MON_NOCLEAR)
2622 		&& gui.cursor_col > 0)
2623 	    (void)gui_redraw_block(gui.cursor_row, gui.cursor_col - 1,
2624 			 gui.cursor_row, gui.cursor_col - 1, GUI_MON_NOCLEAR);
2625 #ifdef FEAT_HANGULIN
2626 	    if (composing_hangul)
2627 		(void)gui_redraw_block(gui.cursor_row, gui.cursor_col + 1,
2628 			gui.cursor_row, gui.cursor_col + 1, GUI_MON_NOCLEAR);
2629 	}
2630 #endif
2631 	/* Cursor_is_valid is reset when the cursor is undrawn, also reset it
2632 	 * here in case it wasn't needed to undraw it. */
2633 	gui.cursor_is_valid = FALSE;
2634     }
2635 }
2636 
2637     void
2638 gui_redraw(
2639     int		x,
2640     int		y,
2641     int		w,
2642     int		h)
2643 {
2644     int		row1, col1, row2, col2;
2645 
2646     row1 = Y_2_ROW(y);
2647     col1 = X_2_COL(x);
2648     row2 = Y_2_ROW(y + h - 1);
2649     col2 = X_2_COL(x + w - 1);
2650 
2651     (void)gui_redraw_block(row1, col1, row2, col2, GUI_MON_NOCLEAR);
2652 
2653     /*
2654      * We may need to redraw the cursor, but don't take it upon us to change
2655      * its location after a scroll.
2656      * (maybe be more strict even and test col too?)
2657      * These things may be outside the update/clipping region and reality may
2658      * not reflect Vims internal ideas if these operations are clipped away.
2659      */
2660     if (gui.row == gui.cursor_row)
2661 	gui_update_cursor(TRUE, TRUE);
2662 }
2663 
2664 /*
2665  * Draw a rectangular block of characters, from row1 to row2 (inclusive) and
2666  * from col1 to col2 (inclusive).
2667  * Return TRUE when the character before the first drawn character has
2668  * different attributes (may have to be redrawn too).
2669  */
2670     int
2671 gui_redraw_block(
2672     int		row1,
2673     int		col1,
2674     int		row2,
2675     int		col2,
2676     int		flags)	/* flags for gui_outstr_nowrap() */
2677 {
2678     int		old_row, old_col;
2679     long_u	old_hl_mask;
2680     int		off;
2681     sattr_T	first_attr;
2682     int		idx, len;
2683     int		back, nback;
2684     int		retval = FALSE;
2685 #ifdef FEAT_MBYTE
2686     int		orig_col1, orig_col2;
2687 #endif
2688 
2689     /* Don't try to update when ScreenLines is not valid */
2690     if (!screen_cleared || ScreenLines == NULL)
2691 	return retval;
2692 
2693     /* Don't try to draw outside the shell! */
2694     /* Check everything, strange values may be caused by a big border width */
2695     col1 = check_col(col1);
2696     col2 = check_col(col2);
2697     row1 = check_row(row1);
2698     row2 = check_row(row2);
2699 
2700     /* Remember where our cursor was */
2701     old_row = gui.row;
2702     old_col = gui.col;
2703     old_hl_mask = gui.highlight_mask;
2704 #ifdef FEAT_MBYTE
2705     orig_col1 = col1;
2706     orig_col2 = col2;
2707 #endif
2708 
2709     for (gui.row = row1; gui.row <= row2; gui.row++)
2710     {
2711 #ifdef FEAT_MBYTE
2712 	/* When only half of a double-wide character is in the block, include
2713 	 * the other half. */
2714 	col1 = orig_col1;
2715 	col2 = orig_col2;
2716 	off = LineOffset[gui.row];
2717 	if (enc_dbcs != 0)
2718 	{
2719 	    if (col1 > 0)
2720 		col1 -= dbcs_screen_head_off(ScreenLines + off,
2721 						    ScreenLines + off + col1);
2722 	    col2 += dbcs_screen_tail_off(ScreenLines + off,
2723 						    ScreenLines + off + col2);
2724 	}
2725 	else if (enc_utf8)
2726 	{
2727 	    if (ScreenLines[off + col1] == 0)
2728 		--col1;
2729 # ifdef FEAT_GUI_GTK
2730 	    if (col2 + 1 < Columns && ScreenLines[off + col2 + 1] == 0)
2731 		++col2;
2732 # endif
2733 	}
2734 #endif
2735 	gui.col = col1;
2736 	off = LineOffset[gui.row] + gui.col;
2737 	len = col2 - col1 + 1;
2738 
2739 	/* Find how many chars back this highlighting starts, or where a space
2740 	 * is.  Needed for when the bold trick is used */
2741 	for (back = 0; back < col1; ++back)
2742 	    if (ScreenAttrs[off - 1 - back] != ScreenAttrs[off]
2743 		    || ScreenLines[off - 1 - back] == ' ')
2744 		break;
2745 	retval = (col1 > 0 && ScreenAttrs[off - 1] != 0 && back == 0
2746 					      && ScreenLines[off - 1] != ' ');
2747 
2748 	/* Break it up in strings of characters with the same attributes. */
2749 	/* Print UTF-8 characters individually. */
2750 	while (len > 0)
2751 	{
2752 	    first_attr = ScreenAttrs[off];
2753 	    gui.highlight_mask = first_attr;
2754 #if defined(FEAT_MBYTE) && !defined(FEAT_GUI_GTK)
2755 	    if (enc_utf8 && ScreenLinesUC[off] != 0)
2756 	    {
2757 		/* output multi-byte character separately */
2758 		nback = gui_screenchar(off, flags,
2759 					  (guicolor_T)0, (guicolor_T)0, back);
2760 		if (gui.col < Columns && ScreenLines[off + 1] == 0)
2761 		    idx = 2;
2762 		else
2763 		    idx = 1;
2764 	    }
2765 	    else if (enc_dbcs == DBCS_JPNU && ScreenLines[off] == 0x8e)
2766 	    {
2767 		/* output double-byte, single-width character separately */
2768 		nback = gui_screenchar(off, flags,
2769 					  (guicolor_T)0, (guicolor_T)0, back);
2770 		idx = 1;
2771 	    }
2772 	    else
2773 #endif
2774 	    {
2775 #ifdef FEAT_GUI_GTK
2776 		for (idx = 0; idx < len; ++idx)
2777 		{
2778 		    if (enc_utf8 && ScreenLines[off + idx] == 0)
2779 			continue; /* skip second half of double-width char */
2780 		    if (ScreenAttrs[off + idx] != first_attr)
2781 			break;
2782 		}
2783 		/* gui_screenstr() takes care of multibyte chars */
2784 		nback = gui_screenstr(off, idx, flags,
2785 				      (guicolor_T)0, (guicolor_T)0, back);
2786 #else
2787 		for (idx = 0; idx < len && ScreenAttrs[off + idx] == first_attr;
2788 									idx++)
2789 		{
2790 # ifdef FEAT_MBYTE
2791 		    /* Stop at a multi-byte Unicode character. */
2792 		    if (enc_utf8 && ScreenLinesUC[off + idx] != 0)
2793 			break;
2794 		    if (enc_dbcs == DBCS_JPNU)
2795 		    {
2796 			/* Stop at a double-byte single-width char. */
2797 			if (ScreenLines[off + idx] == 0x8e)
2798 			    break;
2799 			if (len > 1 && (*mb_ptr2len)(ScreenLines
2800 							    + off + idx) == 2)
2801 			    ++idx;  /* skip second byte of double-byte char */
2802 		    }
2803 # endif
2804 		}
2805 		nback = gui_outstr_nowrap(ScreenLines + off, idx, flags,
2806 					  (guicolor_T)0, (guicolor_T)0, back);
2807 #endif
2808 	    }
2809 	    if (nback == FAIL)
2810 	    {
2811 		/* Must back up to start drawing where a bold or italic word
2812 		 * starts. */
2813 		off -= back;
2814 		len += back;
2815 		gui.col -= back;
2816 	    }
2817 	    else
2818 	    {
2819 		off += idx;
2820 		len -= idx;
2821 	    }
2822 	    back = 0;
2823 	}
2824     }
2825 
2826     /* Put the cursor back where it was */
2827     gui.row = old_row;
2828     gui.col = old_col;
2829     gui.highlight_mask = (int)old_hl_mask;
2830 
2831     return retval;
2832 }
2833 
2834     static void
2835 gui_delete_lines(int row, int count)
2836 {
2837     if (count <= 0)
2838 	return;
2839 
2840     if (row + count > gui.scroll_region_bot)
2841 	/* Scrolled out of region, just blank the lines out */
2842 	gui_clear_block(row, gui.scroll_region_left,
2843 			      gui.scroll_region_bot, gui.scroll_region_right);
2844     else
2845     {
2846 	gui_mch_delete_lines(row, count);
2847 
2848 	/* If the cursor was in the deleted lines it's now gone.  If the
2849 	 * cursor was in the scrolled lines adjust its position. */
2850 	if (gui.cursor_row >= row
2851 		&& gui.cursor_col >= gui.scroll_region_left
2852 		&& gui.cursor_col <= gui.scroll_region_right)
2853 	{
2854 	    if (gui.cursor_row < row + count)
2855 		gui.cursor_is_valid = FALSE;
2856 	    else if (gui.cursor_row <= gui.scroll_region_bot)
2857 		gui.cursor_row -= count;
2858 	}
2859     }
2860 }
2861 
2862     static void
2863 gui_insert_lines(int row, int count)
2864 {
2865     if (count <= 0)
2866 	return;
2867 
2868     if (row + count > gui.scroll_region_bot)
2869 	/* Scrolled out of region, just blank the lines out */
2870 	gui_clear_block(row, gui.scroll_region_left,
2871 			      gui.scroll_region_bot, gui.scroll_region_right);
2872     else
2873     {
2874 	gui_mch_insert_lines(row, count);
2875 
2876 	if (gui.cursor_row >= gui.row
2877 		&& gui.cursor_col >= gui.scroll_region_left
2878 		&& gui.cursor_col <= gui.scroll_region_right)
2879 	{
2880 	    if (gui.cursor_row <= gui.scroll_region_bot - count)
2881 		gui.cursor_row += count;
2882 	    else if (gui.cursor_row <= gui.scroll_region_bot)
2883 		gui.cursor_is_valid = FALSE;
2884 	}
2885     }
2886 }
2887 
2888 /*
2889  * Returns OK if a character was found to be available within the given time,
2890  * or FAIL otherwise.
2891  */
2892     static int
2893 gui_wait_for_chars_or_timer(long wtime)
2894 {
2895 #ifdef FEAT_TIMERS
2896     int	    due_time;
2897     long    remaining = wtime;
2898     int	    tb_change_cnt = typebuf.tb_change_cnt;
2899 
2900     /* When waiting very briefly don't trigger timers. */
2901     if (wtime >= 0 && wtime < 10L)
2902 	return gui_mch_wait_for_chars(wtime);
2903 
2904     while (wtime < 0 || remaining > 0)
2905     {
2906 	/* Trigger timers and then get the time in wtime until the next one is
2907 	 * due.  Wait up to that time. */
2908 	due_time = check_due_timer();
2909 	if (typebuf.tb_change_cnt != tb_change_cnt)
2910 	{
2911 	    /* timer may have used feedkeys() */
2912 	    return FAIL;
2913 	}
2914 	if (due_time <= 0 || (wtime > 0 && due_time > remaining))
2915 	    due_time = remaining;
2916 	if (gui_mch_wait_for_chars(due_time))
2917 	    return OK;
2918 	if (wtime > 0)
2919 	    remaining -= due_time;
2920     }
2921     return FAIL;
2922 #else
2923     return gui_mch_wait_for_chars(wtime);
2924 #endif
2925 }
2926 
2927 /*
2928  * The main GUI input routine.	Waits for a character from the keyboard.
2929  * wtime == -1	    Wait forever.
2930  * wtime == 0	    Don't wait.
2931  * wtime > 0	    Wait wtime milliseconds for a character.
2932  * Returns OK if a character was found to be available within the given time,
2933  * or FAIL otherwise.
2934  */
2935     int
2936 gui_wait_for_chars(long wtime)
2937 {
2938     int	    retval;
2939     int	    tb_change_cnt = typebuf.tb_change_cnt;
2940 
2941 #ifdef FEAT_MENU
2942     /*
2943      * If we're going to wait a bit, update the menus and mouse shape for the
2944      * current State.
2945      */
2946     if (wtime != 0)
2947 	gui_update_menus(0);
2948 #endif
2949 
2950     gui_mch_update();
2951     if (input_available())	/* Got char, return immediately */
2952 	return OK;
2953     if (wtime == 0)	/* Don't wait for char */
2954 	return FAIL;
2955 
2956     /* Before waiting, flush any output to the screen. */
2957     gui_mch_flush();
2958 
2959     if (wtime > 0)
2960     {
2961 	/* Blink when waiting for a character.	Probably only does something
2962 	 * for showmatch() */
2963 	gui_mch_start_blink();
2964 	retval = gui_wait_for_chars_or_timer(wtime);
2965 	gui_mch_stop_blink();
2966 	return retval;
2967     }
2968 
2969     /*
2970      * While we are waiting indefinitely for a character, blink the cursor.
2971      */
2972     gui_mch_start_blink();
2973 
2974     retval = FAIL;
2975     /*
2976      * We may want to trigger the CursorHold event.  First wait for
2977      * 'updatetime' and if nothing is typed within that time put the
2978      * K_CURSORHOLD key in the input buffer.
2979      */
2980     if (gui_wait_for_chars_or_timer(p_ut) == OK)
2981 	retval = OK;
2982 #ifdef FEAT_AUTOCMD
2983     else if (trigger_cursorhold())
2984     {
2985 	char_u	buf[3];
2986 
2987 	/* Put K_CURSORHOLD in the input buffer. */
2988 	buf[0] = CSI;
2989 	buf[1] = KS_EXTRA;
2990 	buf[2] = (int)KE_CURSORHOLD;
2991 	add_to_input_buf(buf, 3);
2992 
2993 	retval = OK;
2994     }
2995 #endif
2996 
2997     if (retval == FAIL && typebuf.tb_change_cnt == tb_change_cnt)
2998     {
2999 	/* Blocking wait. */
3000 	before_blocking();
3001 	retval = gui_wait_for_chars_or_timer(-1L);
3002     }
3003 
3004     gui_mch_stop_blink();
3005     return retval;
3006 }
3007 
3008 /*
3009  * Fill p[4] with mouse coordinates encoded for check_termcode().
3010  */
3011     static void
3012 fill_mouse_coord(char_u *p, int col, int row)
3013 {
3014     p[0] = (char_u)(col / 128 + ' ' + 1);
3015     p[1] = (char_u)(col % 128 + ' ' + 1);
3016     p[2] = (char_u)(row / 128 + ' ' + 1);
3017     p[3] = (char_u)(row % 128 + ' ' + 1);
3018 }
3019 
3020 /*
3021  * Generic mouse support function.  Add a mouse event to the input buffer with
3022  * the given properties.
3023  *  button	    --- may be any of MOUSE_LEFT, MOUSE_MIDDLE, MOUSE_RIGHT,
3024  *			MOUSE_X1, MOUSE_X2
3025  *			MOUSE_DRAG, or MOUSE_RELEASE.
3026  *			MOUSE_4 and MOUSE_5 are used for vertical scroll wheel,
3027  *			MOUSE_6 and MOUSE_7 for horizontal scroll wheel.
3028  *  x, y	    --- Coordinates of mouse in pixels.
3029  *  repeated_click  --- TRUE if this click comes only a short time after a
3030  *			previous click.
3031  *  modifiers	    --- Bit field which may be any of the following modifiers
3032  *			or'ed together: MOUSE_SHIFT | MOUSE_CTRL | MOUSE_ALT.
3033  * This function will ignore drag events where the mouse has not moved to a new
3034  * character.
3035  */
3036     void
3037 gui_send_mouse_event(
3038     int	    button,
3039     int	    x,
3040     int	    y,
3041     int	    repeated_click,
3042     int_u   modifiers)
3043 {
3044     static int	    prev_row = 0, prev_col = 0;
3045     static int	    prev_button = -1;
3046     static int	    num_clicks = 1;
3047     char_u	    string[10];
3048     enum key_extra  button_char;
3049     int		    row, col;
3050 #ifdef FEAT_CLIPBOARD
3051     int		    checkfor;
3052     int		    did_clip = FALSE;
3053 #endif
3054 
3055     /*
3056      * Scrolling may happen at any time, also while a selection is present.
3057      */
3058     switch (button)
3059     {
3060 	case MOUSE_X1:
3061 	    button_char = KE_X1MOUSE;
3062 	    goto button_set;
3063 	case MOUSE_X2:
3064 	    button_char = KE_X2MOUSE;
3065 	    goto button_set;
3066 	case MOUSE_4:
3067 	    button_char = KE_MOUSEDOWN;
3068 	    goto button_set;
3069 	case MOUSE_5:
3070 	    button_char = KE_MOUSEUP;
3071 	    goto button_set;
3072 	case MOUSE_6:
3073 	    button_char = KE_MOUSELEFT;
3074 	    goto button_set;
3075 	case MOUSE_7:
3076 	    button_char = KE_MOUSERIGHT;
3077 button_set:
3078 	    {
3079 		/* Don't put events in the input queue now. */
3080 		if (hold_gui_events)
3081 		    return;
3082 
3083 		string[3] = CSI;
3084 		string[4] = KS_EXTRA;
3085 		string[5] = (int)button_char;
3086 
3087 		/* Pass the pointer coordinates of the scroll event so that we
3088 		 * know which window to scroll. */
3089 		row = gui_xy2colrow(x, y, &col);
3090 		string[6] = (char_u)(col / 128 + ' ' + 1);
3091 		string[7] = (char_u)(col % 128 + ' ' + 1);
3092 		string[8] = (char_u)(row / 128 + ' ' + 1);
3093 		string[9] = (char_u)(row % 128 + ' ' + 1);
3094 
3095 		if (modifiers == 0)
3096 		    add_to_input_buf(string + 3, 7);
3097 		else
3098 		{
3099 		    string[0] = CSI;
3100 		    string[1] = KS_MODIFIER;
3101 		    string[2] = 0;
3102 		    if (modifiers & MOUSE_SHIFT)
3103 			string[2] |= MOD_MASK_SHIFT;
3104 		    if (modifiers & MOUSE_CTRL)
3105 			string[2] |= MOD_MASK_CTRL;
3106 		    if (modifiers & MOUSE_ALT)
3107 			string[2] |= MOD_MASK_ALT;
3108 		    add_to_input_buf(string, 10);
3109 		}
3110 		return;
3111 	    }
3112     }
3113 
3114 #ifdef FEAT_CLIPBOARD
3115     /* If a clipboard selection is in progress, handle it */
3116     if (clip_star.state == SELECT_IN_PROGRESS)
3117     {
3118 	clip_process_selection(button, X_2_COL(x), Y_2_ROW(y), repeated_click);
3119 	return;
3120     }
3121 
3122     /* Determine which mouse settings to look for based on the current mode */
3123     switch (get_real_state())
3124     {
3125 	case NORMAL_BUSY:
3126 	case OP_PENDING:
3127 # ifdef FEAT_TERMINAL
3128 	case TERMINAL:
3129 # endif
3130 	case NORMAL:		checkfor = MOUSE_NORMAL;	break;
3131 	case VISUAL:		checkfor = MOUSE_VISUAL;	break;
3132 	case SELECTMODE:	checkfor = MOUSE_VISUAL;	break;
3133 	case REPLACE:
3134 	case REPLACE+LANGMAP:
3135 # ifdef FEAT_VREPLACE
3136 	case VREPLACE:
3137 	case VREPLACE+LANGMAP:
3138 # endif
3139 	case INSERT:
3140 	case INSERT+LANGMAP:	checkfor = MOUSE_INSERT;	break;
3141 	case ASKMORE:
3142 	case HITRETURN:		/* At the more- and hit-enter prompt pass the
3143 				   mouse event for a click on or below the
3144 				   message line. */
3145 				if (Y_2_ROW(y) >= msg_row)
3146 				    checkfor = MOUSE_NORMAL;
3147 				else
3148 				    checkfor = MOUSE_RETURN;
3149 				break;
3150 
3151 	    /*
3152 	     * On the command line, use the clipboard selection on all lines
3153 	     * but the command line.  But not when pasting.
3154 	     */
3155 	case CMDLINE:
3156 	case CMDLINE+LANGMAP:
3157 	    if (Y_2_ROW(y) < cmdline_row && button != MOUSE_MIDDLE)
3158 		checkfor = MOUSE_NONE;
3159 	    else
3160 		checkfor = MOUSE_COMMAND;
3161 	    break;
3162 
3163 	default:
3164 	    checkfor = MOUSE_NONE;
3165 	    break;
3166     };
3167 
3168     /*
3169      * Allow clipboard selection of text on the command line in "normal"
3170      * modes.  Don't do this when dragging the status line, or extending a
3171      * Visual selection.
3172      */
3173     if ((State == NORMAL || State == NORMAL_BUSY || (State & INSERT))
3174 	    && Y_2_ROW(y) >= topframe->fr_height + firstwin->w_winrow
3175 	    && button != MOUSE_DRAG
3176 # ifdef FEAT_MOUSESHAPE
3177 	    && !drag_status_line
3178 	    && !drag_sep_line
3179 # endif
3180 	    )
3181 	checkfor = MOUSE_NONE;
3182 
3183     /*
3184      * Use modeless selection when holding CTRL and SHIFT pressed.
3185      */
3186     if ((modifiers & MOUSE_CTRL) && (modifiers & MOUSE_SHIFT))
3187 	checkfor = MOUSE_NONEF;
3188 
3189     /*
3190      * In Ex mode, always use modeless selection.
3191      */
3192     if (exmode_active)
3193 	checkfor = MOUSE_NONE;
3194 
3195     /*
3196      * If the mouse settings say to not use the mouse, use the modeless
3197      * selection.  But if Visual is active, assume that only the Visual area
3198      * will be selected.
3199      * Exception: On the command line, both the selection is used and a mouse
3200      * key is send.
3201      */
3202     if (!mouse_has(checkfor) || checkfor == MOUSE_COMMAND)
3203     {
3204 	/* Don't do modeless selection in Visual mode. */
3205 	if (checkfor != MOUSE_NONEF && VIsual_active && (State & NORMAL))
3206 	    return;
3207 
3208 	/*
3209 	 * When 'mousemodel' is "popup", shift-left is translated to right.
3210 	 * But not when also using Ctrl.
3211 	 */
3212 	if (mouse_model_popup() && button == MOUSE_LEFT
3213 		&& (modifiers & MOUSE_SHIFT) && !(modifiers & MOUSE_CTRL))
3214 	{
3215 	    button = MOUSE_RIGHT;
3216 	    modifiers &= ~ MOUSE_SHIFT;
3217 	}
3218 
3219 	/* If the selection is done, allow the right button to extend it.
3220 	 * If the selection is cleared, allow the right button to start it
3221 	 * from the cursor position. */
3222 	if (button == MOUSE_RIGHT)
3223 	{
3224 	    if (clip_star.state == SELECT_CLEARED)
3225 	    {
3226 		if (State & CMDLINE)
3227 		{
3228 		    col = msg_col;
3229 		    row = msg_row;
3230 		}
3231 		else
3232 		{
3233 		    col = curwin->w_wcol;
3234 		    row = curwin->w_wrow + W_WINROW(curwin);
3235 		}
3236 		clip_start_selection(col, row, FALSE);
3237 	    }
3238 	    clip_process_selection(button, X_2_COL(x), Y_2_ROW(y),
3239 							      repeated_click);
3240 	    did_clip = TRUE;
3241 	}
3242 	/* Allow the left button to start the selection */
3243 	else if (button == MOUSE_LEFT)
3244 	{
3245 	    clip_start_selection(X_2_COL(x), Y_2_ROW(y), repeated_click);
3246 	    did_clip = TRUE;
3247 	}
3248 
3249 	/* Always allow pasting */
3250 	if (button != MOUSE_MIDDLE)
3251 	{
3252 	    if (!mouse_has(checkfor) || button == MOUSE_RELEASE)
3253 		return;
3254 	    if (checkfor != MOUSE_COMMAND)
3255 		button = MOUSE_LEFT;
3256 	}
3257 	repeated_click = FALSE;
3258     }
3259 
3260     if (clip_star.state != SELECT_CLEARED && !did_clip)
3261 	clip_clear_selection(&clip_star);
3262 #endif
3263 
3264     /* Don't put events in the input queue now. */
3265     if (hold_gui_events)
3266 	return;
3267 
3268     row = gui_xy2colrow(x, y, &col);
3269 
3270     /*
3271      * If we are dragging and the mouse hasn't moved far enough to be on a
3272      * different character, then don't send an event to vim.
3273      */
3274     if (button == MOUSE_DRAG)
3275     {
3276 	if (row == prev_row && col == prev_col)
3277 	    return;
3278 	/* Dragging above the window, set "row" to -1 to cause a scroll. */
3279 	if (y < 0)
3280 	    row = -1;
3281     }
3282 
3283     /*
3284      * If topline has changed (window scrolled) since the last click, reset
3285      * repeated_click, because we don't want starting Visual mode when
3286      * clicking on a different character in the text.
3287      */
3288     if (curwin->w_topline != gui_prev_topline
3289 #ifdef FEAT_DIFF
3290 	    || curwin->w_topfill != gui_prev_topfill
3291 #endif
3292 	    )
3293 	repeated_click = FALSE;
3294 
3295     string[0] = CSI;	/* this sequence is recognized by check_termcode() */
3296     string[1] = KS_MOUSE;
3297     string[2] = KE_FILLER;
3298     if (button != MOUSE_DRAG && button != MOUSE_RELEASE)
3299     {
3300 	if (repeated_click)
3301 	{
3302 	    /*
3303 	     * Handle multiple clicks.	They only count if the mouse is still
3304 	     * pointing at the same character.
3305 	     */
3306 	    if (button != prev_button || row != prev_row || col != prev_col)
3307 		num_clicks = 1;
3308 	    else if (++num_clicks > 4)
3309 		num_clicks = 1;
3310 	}
3311 	else
3312 	    num_clicks = 1;
3313 	prev_button = button;
3314 	gui_prev_topline = curwin->w_topline;
3315 #ifdef FEAT_DIFF
3316 	gui_prev_topfill = curwin->w_topfill;
3317 #endif
3318 
3319 	string[3] = (char_u)(button | 0x20);
3320 	SET_NUM_MOUSE_CLICKS(string[3], num_clicks);
3321     }
3322     else
3323 	string[3] = (char_u)button;
3324 
3325     string[3] |= modifiers;
3326     fill_mouse_coord(string + 4, col, row);
3327     add_to_input_buf(string, 8);
3328 
3329     if (row < 0)
3330 	prev_row = 0;
3331     else
3332 	prev_row = row;
3333     prev_col = col;
3334 
3335     /*
3336      * We need to make sure this is cleared since Athena doesn't tell us when
3337      * he is done dragging.  Neither does GTK+ 2 -- at least for now.
3338      */
3339 #if defined(FEAT_GUI_ATHENA) || defined(FEAT_GUI_GTK)
3340     gui.dragged_sb = SBAR_NONE;
3341 #endif
3342 }
3343 
3344 /*
3345  * Convert x and y coordinate to column and row in text window.
3346  * Corrects for multi-byte character.
3347  * returns column in "*colp" and row as return value;
3348  */
3349     int
3350 gui_xy2colrow(int x, int y, int *colp)
3351 {
3352     int		col = check_col(X_2_COL(x));
3353     int		row = check_row(Y_2_ROW(y));
3354 
3355 #ifdef FEAT_MBYTE
3356     *colp = mb_fix_col(col, row);
3357 #else
3358     *colp = col;
3359 #endif
3360     return row;
3361 }
3362 
3363 #if defined(FEAT_MENU) || defined(PROTO)
3364 /*
3365  * Callback function for when a menu entry has been selected.
3366  */
3367     void
3368 gui_menu_cb(vimmenu_T *menu)
3369 {
3370     char_u  bytes[sizeof(long_u)];
3371 
3372     /* Don't put events in the input queue now. */
3373     if (hold_gui_events)
3374 	return;
3375 
3376     bytes[0] = CSI;
3377     bytes[1] = KS_MENU;
3378     bytes[2] = KE_FILLER;
3379     add_to_input_buf(bytes, 3);
3380     add_long_to_buf((long_u)menu, bytes);
3381     add_to_input_buf_csi(bytes, sizeof(long_u));
3382 }
3383 #endif
3384 
3385 static int	prev_which_scrollbars[3];
3386 
3387 /*
3388  * Set which components are present.
3389  * If "oldval" is not NULL, "oldval" is the previous value, the new value is
3390  * in p_go.
3391  */
3392     void
3393 gui_init_which_components(char_u *oldval UNUSED)
3394 {
3395 #ifdef FEAT_MENU
3396     static int	prev_menu_is_active = -1;
3397 #endif
3398 #ifdef FEAT_TOOLBAR
3399     static int	prev_toolbar = -1;
3400     int		using_toolbar = FALSE;
3401 #endif
3402 #ifdef FEAT_GUI_TABLINE
3403     int		using_tabline;
3404 #endif
3405 #ifdef FEAT_FOOTER
3406     static int	prev_footer = -1;
3407     int		using_footer = FALSE;
3408 #endif
3409 #if defined(FEAT_MENU)
3410     static int	prev_tearoff = -1;
3411     int		using_tearoff = FALSE;
3412 #endif
3413 
3414     char_u	*p;
3415     int		i;
3416 #ifdef FEAT_MENU
3417     int		grey_old, grey_new;
3418     char_u	*temp;
3419 #endif
3420     win_T	*wp;
3421     int		need_set_size;
3422     int		fix_size;
3423 
3424 #ifdef FEAT_MENU
3425     if (oldval != NULL && gui.in_use)
3426     {
3427 	/*
3428 	 * Check if the menu's go from grey to non-grey or vise versa.
3429 	 */
3430 	grey_old = (vim_strchr(oldval, GO_GREY) != NULL);
3431 	grey_new = (vim_strchr(p_go, GO_GREY) != NULL);
3432 	if (grey_old != grey_new)
3433 	{
3434 	    temp = p_go;
3435 	    p_go = oldval;
3436 	    gui_update_menus(MENU_ALL_MODES);
3437 	    p_go = temp;
3438 	}
3439     }
3440     gui.menu_is_active = FALSE;
3441 #endif
3442 
3443     for (i = 0; i < 3; i++)
3444 	gui.which_scrollbars[i] = FALSE;
3445     for (p = p_go; *p; p++)
3446 	switch (*p)
3447 	{
3448 	    case GO_LEFT:
3449 		gui.which_scrollbars[SBAR_LEFT] = TRUE;
3450 		break;
3451 	    case GO_RIGHT:
3452 		gui.which_scrollbars[SBAR_RIGHT] = TRUE;
3453 		break;
3454 	    case GO_VLEFT:
3455 		if (win_hasvertsplit())
3456 		    gui.which_scrollbars[SBAR_LEFT] = TRUE;
3457 		break;
3458 	    case GO_VRIGHT:
3459 		if (win_hasvertsplit())
3460 		    gui.which_scrollbars[SBAR_RIGHT] = TRUE;
3461 		break;
3462 	    case GO_BOT:
3463 		gui.which_scrollbars[SBAR_BOTTOM] = TRUE;
3464 		break;
3465 #ifdef FEAT_MENU
3466 	    case GO_MENUS:
3467 		gui.menu_is_active = TRUE;
3468 		break;
3469 #endif
3470 	    case GO_GREY:
3471 		/* make menu's have grey items, ignored here */
3472 		break;
3473 #ifdef FEAT_TOOLBAR
3474 	    case GO_TOOLBAR:
3475 		using_toolbar = TRUE;
3476 		break;
3477 #endif
3478 #ifdef FEAT_FOOTER
3479 	    case GO_FOOTER:
3480 		using_footer = TRUE;
3481 		break;
3482 #endif
3483 	    case GO_TEAROFF:
3484 #if defined(FEAT_MENU)
3485 		using_tearoff = TRUE;
3486 #endif
3487 		break;
3488 	    default:
3489 		/* Ignore options that are not supported */
3490 		break;
3491 	}
3492 
3493     if (gui.in_use)
3494     {
3495 	need_set_size = 0;
3496 	fix_size = FALSE;
3497 
3498 #ifdef FEAT_GUI_TABLINE
3499 	/* Update the GUI tab line, it may appear or disappear.  This may
3500 	 * cause the non-GUI tab line to disappear or appear. */
3501 	using_tabline = gui_has_tabline();
3502 	if (!gui_mch_showing_tabline() != !using_tabline)
3503 	{
3504 	    /* We don't want a resize event change "Rows" here, save and
3505 	     * restore it.  Resizing is handled below. */
3506 	    i = Rows;
3507 	    gui_update_tabline();
3508 	    Rows = i;
3509 	    need_set_size |= RESIZE_VERT;
3510 	    if (using_tabline)
3511 		fix_size = TRUE;
3512 	    if (!gui_use_tabline())
3513 		redraw_tabline = TRUE;    /* may draw non-GUI tab line */
3514 	}
3515 #endif
3516 
3517 	for (i = 0; i < 3; i++)
3518 	{
3519 	    /* The scrollbar needs to be updated when it is shown/unshown and
3520 	     * when switching tab pages.  But the size only changes when it's
3521 	     * shown/unshown.  Thus we need two places to remember whether a
3522 	     * scrollbar is there or not. */
3523 	    if (gui.which_scrollbars[i] != prev_which_scrollbars[i]
3524 		    || gui.which_scrollbars[i]
3525 					!= curtab->tp_prev_which_scrollbars[i])
3526 	    {
3527 		if (i == SBAR_BOTTOM)
3528 		    gui_mch_enable_scrollbar(&gui.bottom_sbar,
3529 						     gui.which_scrollbars[i]);
3530 		else
3531 		{
3532 		    FOR_ALL_WINDOWS(wp)
3533 		    {
3534 			gui_do_scrollbar(wp, i, gui.which_scrollbars[i]);
3535 		    }
3536 		}
3537 		if (gui.which_scrollbars[i] != prev_which_scrollbars[i])
3538 		{
3539 		    if (i == SBAR_BOTTOM)
3540 			need_set_size |= RESIZE_VERT;
3541 		    else
3542 			need_set_size |= RESIZE_HOR;
3543 		    if (gui.which_scrollbars[i])
3544 			fix_size = TRUE;
3545 		}
3546 	    }
3547 	    curtab->tp_prev_which_scrollbars[i] = gui.which_scrollbars[i];
3548 	    prev_which_scrollbars[i] = gui.which_scrollbars[i];
3549 	}
3550 
3551 #ifdef FEAT_MENU
3552 	if (gui.menu_is_active != prev_menu_is_active)
3553 	{
3554 	    /* We don't want a resize event change "Rows" here, save and
3555 	     * restore it.  Resizing is handled below. */
3556 	    i = Rows;
3557 	    gui_mch_enable_menu(gui.menu_is_active);
3558 	    Rows = i;
3559 	    prev_menu_is_active = gui.menu_is_active;
3560 	    need_set_size |= RESIZE_VERT;
3561 	    if (gui.menu_is_active)
3562 		fix_size = TRUE;
3563 	}
3564 #endif
3565 
3566 #ifdef FEAT_TOOLBAR
3567 	if (using_toolbar != prev_toolbar)
3568 	{
3569 	    gui_mch_show_toolbar(using_toolbar);
3570 	    prev_toolbar = using_toolbar;
3571 	    need_set_size |= RESIZE_VERT;
3572 	    if (using_toolbar)
3573 		fix_size = TRUE;
3574 	}
3575 #endif
3576 #ifdef FEAT_FOOTER
3577 	if (using_footer != prev_footer)
3578 	{
3579 	    gui_mch_enable_footer(using_footer);
3580 	    prev_footer = using_footer;
3581 	    need_set_size |= RESIZE_VERT;
3582 	    if (using_footer)
3583 		fix_size = TRUE;
3584 	}
3585 #endif
3586 #if defined(FEAT_MENU) && !(defined(WIN3264) && !defined(FEAT_TEAROFF))
3587 	if (using_tearoff != prev_tearoff)
3588 	{
3589 	    gui_mch_toggle_tearoffs(using_tearoff);
3590 	    prev_tearoff = using_tearoff;
3591 	}
3592 #endif
3593 	if (need_set_size != 0)
3594 	{
3595 #ifdef FEAT_GUI_GTK
3596 	    long    prev_Columns = Columns;
3597 	    long    prev_Rows = Rows;
3598 #endif
3599 	    /* Adjust the size of the window to make the text area keep the
3600 	     * same size and to avoid that part of our window is off-screen
3601 	     * and a scrollbar can't be used, for example. */
3602 	    gui_set_shellsize(FALSE, fix_size, need_set_size);
3603 
3604 #ifdef FEAT_GUI_GTK
3605 	    /* GTK has the annoying habit of sending us resize events when
3606 	     * changing the window size ourselves.  This mostly happens when
3607 	     * waiting for a character to arrive, quite unpredictably, and may
3608 	     * change Columns and Rows when we don't want it.  Wait for a
3609 	     * character here to avoid this effect.
3610 	     * If you remove this, please test this command for resizing
3611 	     * effects (with optional left scrollbar): ":vsp|q|vsp|q|vsp|q".
3612 	     * Don't do this while starting up though.
3613 	     * Don't change Rows when adding menu/toolbar/tabline.
3614 	     * Don't change Columns when adding vertical toolbar. */
3615 	    if (!gui.starting && need_set_size != (RESIZE_VERT | RESIZE_HOR))
3616 		(void)char_avail();
3617 	    if ((need_set_size & RESIZE_VERT) == 0)
3618 		Rows = prev_Rows;
3619 	    if ((need_set_size & RESIZE_HOR) == 0)
3620 		Columns = prev_Columns;
3621 #endif
3622 	}
3623 	/* When the console tabline appears or disappears the window positions
3624 	 * change. */
3625 	if (firstwin->w_winrow != tabline_height())
3626 	    shell_new_rows();	/* recompute window positions and heights */
3627     }
3628 }
3629 
3630 #if defined(FEAT_GUI_TABLINE) || defined(PROTO)
3631 /*
3632  * Return TRUE if the GUI is taking care of the tabline.
3633  * It may still be hidden if 'showtabline' is zero.
3634  */
3635     int
3636 gui_use_tabline(void)
3637 {
3638     return gui.in_use && vim_strchr(p_go, GO_TABLINE) != NULL;
3639 }
3640 
3641 /*
3642  * Return TRUE if the GUI is showing the tabline.
3643  * This uses 'showtabline'.
3644  */
3645     static int
3646 gui_has_tabline(void)
3647 {
3648     if (!gui_use_tabline()
3649 	    || p_stal == 0
3650 	    || (p_stal == 1 && first_tabpage->tp_next == NULL))
3651 	return FALSE;
3652     return TRUE;
3653 }
3654 
3655 /*
3656  * Update the tabline.
3657  * This may display/undisplay the tabline and update the labels.
3658  */
3659     void
3660 gui_update_tabline(void)
3661 {
3662     int	    showit = gui_has_tabline();
3663     int	    shown = gui_mch_showing_tabline();
3664 
3665     if (!gui.starting && starting == 0)
3666     {
3667 	/* Updating the tabline uses direct GUI commands, flush
3668 	 * outstanding instructions first. (esp. clear screen) */
3669 	out_flush();
3670 	gui_mch_flush();
3671 
3672 	if (!showit != !shown)
3673 	    gui_mch_show_tabline(showit);
3674 	if (showit != 0)
3675 	    gui_mch_update_tabline();
3676 
3677 	/* When the tabs change from hidden to shown or from shown to
3678 	 * hidden the size of the text area should remain the same. */
3679 	if (!showit != !shown)
3680 	    gui_set_shellsize(FALSE, showit, RESIZE_VERT);
3681     }
3682 }
3683 
3684 /*
3685  * Get the label or tooltip for tab page "tp" into NameBuff[].
3686  */
3687     void
3688 get_tabline_label(
3689     tabpage_T	*tp,
3690     int		tooltip)	/* TRUE: get tooltip */
3691 {
3692     int		modified = FALSE;
3693     char_u	buf[40];
3694     int		wincount;
3695     win_T	*wp;
3696     char_u	**opt;
3697 
3698     /* Use 'guitablabel' or 'guitabtooltip' if it's set. */
3699     opt = (tooltip ? &p_gtt : &p_gtl);
3700     if (**opt != NUL)
3701     {
3702 	int	use_sandbox = FALSE;
3703 	int	save_called_emsg = called_emsg;
3704 	char_u	res[MAXPATHL];
3705 	tabpage_T *save_curtab;
3706 	char_u	*opt_name = (char_u *)(tooltip ? "guitabtooltip"
3707 							     : "guitablabel");
3708 
3709 	called_emsg = FALSE;
3710 
3711 	printer_page_num = tabpage_index(tp);
3712 # ifdef FEAT_EVAL
3713 	set_vim_var_nr(VV_LNUM, printer_page_num);
3714 	use_sandbox = was_set_insecurely(opt_name, 0);
3715 # endif
3716 	/* It's almost as going to the tabpage, but without autocommands. */
3717 	curtab->tp_firstwin = firstwin;
3718 	curtab->tp_lastwin = lastwin;
3719 	curtab->tp_curwin = curwin;
3720 	save_curtab = curtab;
3721 	curtab = tp;
3722 	topframe = curtab->tp_topframe;
3723 	firstwin = curtab->tp_firstwin;
3724 	lastwin = curtab->tp_lastwin;
3725 	curwin = curtab->tp_curwin;
3726 	curbuf = curwin->w_buffer;
3727 
3728 	/* Can't use NameBuff directly, build_stl_str_hl() uses it. */
3729 	build_stl_str_hl(curwin, res, MAXPATHL, *opt, use_sandbox,
3730 						 0, (int)Columns, NULL, NULL);
3731 	STRCPY(NameBuff, res);
3732 
3733 	/* Back to the original curtab. */
3734 	curtab = save_curtab;
3735 	topframe = curtab->tp_topframe;
3736 	firstwin = curtab->tp_firstwin;
3737 	lastwin = curtab->tp_lastwin;
3738 	curwin = curtab->tp_curwin;
3739 	curbuf = curwin->w_buffer;
3740 
3741 	if (called_emsg)
3742 	    set_string_option_direct(opt_name, -1,
3743 					   (char_u *)"", OPT_FREE, SID_ERROR);
3744 	called_emsg |= save_called_emsg;
3745     }
3746 
3747     /* If 'guitablabel'/'guitabtooltip' is not set or the result is empty then
3748      * use a default label. */
3749     if (**opt == NUL || *NameBuff == NUL)
3750     {
3751 	/* Get the buffer name into NameBuff[] and shorten it. */
3752 	get_trans_bufname(tp == curtab ? curbuf : tp->tp_curwin->w_buffer);
3753 	if (!tooltip)
3754 	    shorten_dir(NameBuff);
3755 
3756 	wp = (tp == curtab) ? firstwin : tp->tp_firstwin;
3757 	for (wincount = 0; wp != NULL; wp = wp->w_next, ++wincount)
3758 	    if (bufIsChanged(wp->w_buffer))
3759 		modified = TRUE;
3760 	if (modified || wincount > 1)
3761 	{
3762 	    if (wincount > 1)
3763 		vim_snprintf((char *)buf, sizeof(buf), "%d", wincount);
3764 	    else
3765 		buf[0] = NUL;
3766 	    if (modified)
3767 		STRCAT(buf, "+");
3768 	    STRCAT(buf, " ");
3769 	    STRMOVE(NameBuff + STRLEN(buf), NameBuff);
3770 	    mch_memmove(NameBuff, buf, STRLEN(buf));
3771 	}
3772     }
3773 }
3774 
3775 /*
3776  * Send the event for clicking to select tab page "nr".
3777  * Returns TRUE if it was done, FALSE when skipped because we are already at
3778  * that tab page or the cmdline window is open.
3779  */
3780     int
3781 send_tabline_event(int nr)
3782 {
3783     char_u string[3];
3784 
3785     if (nr == tabpage_index(curtab))
3786 	return FALSE;
3787 
3788     /* Don't put events in the input queue now. */
3789     if (hold_gui_events
3790 # ifdef FEAT_CMDWIN
3791 	    || cmdwin_type != 0
3792 # endif
3793 	    )
3794     {
3795 	/* Set it back to the current tab page. */
3796 	gui_mch_set_curtab(tabpage_index(curtab));
3797 	return FALSE;
3798     }
3799 
3800     string[0] = CSI;
3801     string[1] = KS_TABLINE;
3802     string[2] = KE_FILLER;
3803     add_to_input_buf(string, 3);
3804     string[0] = nr;
3805     add_to_input_buf_csi(string, 1);
3806     return TRUE;
3807 }
3808 
3809 /*
3810  * Send a tabline menu event
3811  */
3812     void
3813 send_tabline_menu_event(int tabidx, int event)
3814 {
3815     char_u	    string[3];
3816 
3817     /* Don't put events in the input queue now. */
3818     if (hold_gui_events)
3819 	return;
3820 
3821     string[0] = CSI;
3822     string[1] = KS_TABMENU;
3823     string[2] = KE_FILLER;
3824     add_to_input_buf(string, 3);
3825     string[0] = tabidx;
3826     string[1] = (char_u)(long)event;
3827     add_to_input_buf_csi(string, 2);
3828 }
3829 
3830 #endif
3831 
3832 /*
3833  * Scrollbar stuff:
3834  */
3835 
3836 /*
3837  * Remove all scrollbars.  Used before switching to another tab page.
3838  */
3839     void
3840 gui_remove_scrollbars(void)
3841 {
3842     int	    i;
3843     win_T   *wp;
3844 
3845     for (i = 0; i < 3; i++)
3846     {
3847 	if (i == SBAR_BOTTOM)
3848 	    gui_mch_enable_scrollbar(&gui.bottom_sbar, FALSE);
3849 	else
3850 	{
3851 	    FOR_ALL_WINDOWS(wp)
3852 	    {
3853 		gui_do_scrollbar(wp, i, FALSE);
3854 	    }
3855 	}
3856 	curtab->tp_prev_which_scrollbars[i] = -1;
3857     }
3858 }
3859 
3860     void
3861 gui_create_scrollbar(scrollbar_T *sb, int type, win_T *wp)
3862 {
3863     static int	sbar_ident = 0;
3864 
3865     sb->ident = sbar_ident++;	/* No check for too big, but would it happen? */
3866     sb->wp = wp;
3867     sb->type = type;
3868     sb->value = 0;
3869 #ifdef FEAT_GUI_ATHENA
3870     sb->pixval = 0;
3871 #endif
3872     sb->size = 1;
3873     sb->max = 1;
3874     sb->top = 0;
3875     sb->height = 0;
3876     sb->width = 0;
3877     sb->status_height = 0;
3878     gui_mch_create_scrollbar(sb, (wp == NULL) ? SBAR_HORIZ : SBAR_VERT);
3879 }
3880 
3881 /*
3882  * Find the scrollbar with the given index.
3883  */
3884     scrollbar_T *
3885 gui_find_scrollbar(long ident)
3886 {
3887     win_T	*wp;
3888 
3889     if (gui.bottom_sbar.ident == ident)
3890 	return &gui.bottom_sbar;
3891     FOR_ALL_WINDOWS(wp)
3892     {
3893 	if (wp->w_scrollbars[SBAR_LEFT].ident == ident)
3894 	    return &wp->w_scrollbars[SBAR_LEFT];
3895 	if (wp->w_scrollbars[SBAR_RIGHT].ident == ident)
3896 	    return &wp->w_scrollbars[SBAR_RIGHT];
3897     }
3898     return NULL;
3899 }
3900 
3901 /*
3902  * For most systems: Put a code in the input buffer for a dragged scrollbar.
3903  *
3904  * For Win32, Macintosh and GTK+ 2:
3905  * Scrollbars seem to grab focus and vim doesn't read the input queue until
3906  * you stop dragging the scrollbar.  We get here each time the scrollbar is
3907  * dragged another pixel, but as far as the rest of vim goes, it thinks
3908  * we're just hanging in the call to DispatchMessage() in
3909  * process_message().  The DispatchMessage() call that hangs was passed a
3910  * mouse button click event in the scrollbar window. -- webb.
3911  *
3912  * Solution: Do the scrolling right here.  But only when allowed.
3913  * Ignore the scrollbars while executing an external command or when there
3914  * are still characters to be processed.
3915  */
3916     void
3917 gui_drag_scrollbar(scrollbar_T *sb, long value, int still_dragging)
3918 {
3919     win_T	*wp;
3920     int		sb_num;
3921 #ifdef USE_ON_FLY_SCROLL
3922     colnr_T	old_leftcol = curwin->w_leftcol;
3923 # ifdef FEAT_SCROLLBIND
3924     linenr_T	old_topline = curwin->w_topline;
3925 # endif
3926 # ifdef FEAT_DIFF
3927     int		old_topfill = curwin->w_topfill;
3928 # endif
3929 #else
3930     char_u	bytes[sizeof(long_u)];
3931     int		byte_count;
3932 #endif
3933 
3934     if (sb == NULL)
3935 	return;
3936 
3937     /* Don't put events in the input queue now. */
3938     if (hold_gui_events)
3939 	return;
3940 
3941 #ifdef FEAT_CMDWIN
3942     if (cmdwin_type != 0 && sb->wp != curwin)
3943 	return;
3944 #endif
3945 
3946     if (still_dragging)
3947     {
3948 	if (sb->wp == NULL)
3949 	    gui.dragged_sb = SBAR_BOTTOM;
3950 	else if (sb == &sb->wp->w_scrollbars[SBAR_LEFT])
3951 	    gui.dragged_sb = SBAR_LEFT;
3952 	else
3953 	    gui.dragged_sb = SBAR_RIGHT;
3954 	gui.dragged_wp = sb->wp;
3955     }
3956     else
3957     {
3958 	gui.dragged_sb = SBAR_NONE;
3959 #ifdef FEAT_GUI_GTK
3960 	/* Keep the "dragged_wp" value until after the scrolling, for when the
3961 	 * mouse button is released.  GTK2 doesn't send the button-up event. */
3962 	gui.dragged_wp = NULL;
3963 #endif
3964     }
3965 
3966     /* Vertical sbar info is kept in the first sbar (the left one) */
3967     if (sb->wp != NULL)
3968 	sb = &sb->wp->w_scrollbars[0];
3969 
3970     /*
3971      * Check validity of value
3972      */
3973     if (value < 0)
3974 	value = 0;
3975 #ifdef SCROLL_PAST_END
3976     else if (value > sb->max)
3977 	value = sb->max;
3978 #else
3979     if (value > sb->max - sb->size + 1)
3980 	value = sb->max - sb->size + 1;
3981 #endif
3982 
3983     sb->value = value;
3984 
3985 #ifdef USE_ON_FLY_SCROLL
3986     /* When not allowed to do the scrolling right now, return.
3987      * This also checked input_available(), but that causes the first click in
3988      * a scrollbar to be ignored when Vim doesn't have focus. */
3989     if (dont_scroll)
3990 	return;
3991 #endif
3992 #ifdef FEAT_INS_EXPAND
3993     /* Disallow scrolling the current window when the completion popup menu is
3994      * visible. */
3995     if ((sb->wp == NULL || sb->wp == curwin) && pum_visible())
3996 	return;
3997 #endif
3998 
3999 #ifdef FEAT_RIGHTLEFT
4000     if (sb->wp == NULL && curwin->w_p_rl)
4001     {
4002 	value = sb->max + 1 - sb->size - value;
4003 	if (value < 0)
4004 	    value = 0;
4005     }
4006 #endif
4007 
4008     if (sb->wp != NULL)		/* vertical scrollbar */
4009     {
4010 	sb_num = 0;
4011 	for (wp = firstwin; wp != sb->wp && wp != NULL; wp = wp->w_next)
4012 	    sb_num++;
4013 	if (wp == NULL)
4014 	    return;
4015 
4016 #ifdef USE_ON_FLY_SCROLL
4017 	current_scrollbar = sb_num;
4018 	scrollbar_value = value;
4019 	if (State & NORMAL)
4020 	{
4021 	    gui_do_scroll();
4022 	    setcursor();
4023 	}
4024 	else if (State & INSERT)
4025 	{
4026 	    ins_scroll();
4027 	    setcursor();
4028 	}
4029 	else if (State & CMDLINE)
4030 	{
4031 	    if (msg_scrolled == 0)
4032 	    {
4033 		gui_do_scroll();
4034 		redrawcmdline();
4035 	    }
4036 	}
4037 # ifdef FEAT_FOLDING
4038 	/* Value may have been changed for closed fold. */
4039 	sb->value = sb->wp->w_topline - 1;
4040 # endif
4041 
4042 	/* When dragging one scrollbar and there is another one at the other
4043 	 * side move the thumb of that one too. */
4044 	if (gui.which_scrollbars[SBAR_RIGHT] && gui.which_scrollbars[SBAR_LEFT])
4045 	    gui_mch_set_scrollbar_thumb(
4046 		    &sb->wp->w_scrollbars[
4047 			    sb == &sb->wp->w_scrollbars[SBAR_RIGHT]
4048 						    ? SBAR_LEFT : SBAR_RIGHT],
4049 		    sb->value, sb->size, sb->max);
4050 
4051 #else
4052 	bytes[0] = CSI;
4053 	bytes[1] = KS_VER_SCROLLBAR;
4054 	bytes[2] = KE_FILLER;
4055 	bytes[3] = (char_u)sb_num;
4056 	byte_count = 4;
4057 #endif
4058     }
4059     else
4060     {
4061 #ifdef USE_ON_FLY_SCROLL
4062 	scrollbar_value = value;
4063 
4064 	if (State & NORMAL)
4065 	    gui_do_horiz_scroll(scrollbar_value, FALSE);
4066 	else if (State & INSERT)
4067 	    ins_horscroll();
4068 	else if (State & CMDLINE)
4069 	{
4070 	    if (msg_scrolled == 0)
4071 	    {
4072 		gui_do_horiz_scroll(scrollbar_value, FALSE);
4073 		redrawcmdline();
4074 	    }
4075 	}
4076 	if (old_leftcol != curwin->w_leftcol)
4077 	{
4078 	    updateWindow(curwin);   /* update window, status and cmdline */
4079 	    setcursor();
4080 	}
4081 #else
4082 	bytes[0] = CSI;
4083 	bytes[1] = KS_HOR_SCROLLBAR;
4084 	bytes[2] = KE_FILLER;
4085 	byte_count = 3;
4086 #endif
4087     }
4088 
4089 #ifdef USE_ON_FLY_SCROLL
4090 # ifdef FEAT_SCROLLBIND
4091     /*
4092      * synchronize other windows, as necessary according to 'scrollbind'
4093      */
4094     if (curwin->w_p_scb
4095 	    && ((sb->wp == NULL && curwin->w_leftcol != old_leftcol)
4096 		|| (sb->wp == curwin && (curwin->w_topline != old_topline
4097 #  ifdef FEAT_DIFF
4098 					   || curwin->w_topfill != old_topfill
4099 #  endif
4100 			))))
4101     {
4102 	do_check_scrollbind(TRUE);
4103 	/* need to update the window right here */
4104 	FOR_ALL_WINDOWS(wp)
4105 	    if (wp->w_redr_type > 0)
4106 		updateWindow(wp);
4107 	setcursor();
4108     }
4109 # endif
4110     out_flush();
4111     gui_update_cursor(FALSE, TRUE);
4112 #else
4113     add_to_input_buf(bytes, byte_count);
4114     add_long_to_buf((long_u)value, bytes);
4115     add_to_input_buf_csi(bytes, sizeof(long_u));
4116 #endif
4117 }
4118 
4119 /*
4120  * Scrollbar stuff:
4121  */
4122 
4123 /*
4124  * Called when something in the window layout has changed.
4125  */
4126     void
4127 gui_may_update_scrollbars(void)
4128 {
4129     if (gui.in_use && starting == 0)
4130     {
4131 	out_flush();
4132 	gui_init_which_components(NULL);
4133 	gui_update_scrollbars(TRUE);
4134     }
4135     need_mouse_correct = TRUE;
4136 }
4137 
4138     void
4139 gui_update_scrollbars(
4140     int		force)	    /* Force all scrollbars to get updated */
4141 {
4142     win_T	*wp;
4143     scrollbar_T	*sb;
4144     long	val, size, max;		/* need 32 bits here */
4145     int		which_sb;
4146     int		h, y;
4147     static win_T *prev_curwin = NULL;
4148 
4149     /* Update the horizontal scrollbar */
4150     gui_update_horiz_scrollbar(force);
4151 
4152 #ifndef WIN3264
4153     /* Return straight away if there is neither a left nor right scrollbar.
4154      * On MS-Windows this is required anyway for scrollwheel messages. */
4155     if (!gui.which_scrollbars[SBAR_LEFT] && !gui.which_scrollbars[SBAR_RIGHT])
4156 	return;
4157 #endif
4158 
4159     /*
4160      * Don't want to update a scrollbar while we're dragging it.  But if we
4161      * have both a left and right scrollbar, and we drag one of them, we still
4162      * need to update the other one.
4163      */
4164     if (!force && (gui.dragged_sb == SBAR_LEFT || gui.dragged_sb == SBAR_RIGHT)
4165 	    && gui.which_scrollbars[SBAR_LEFT]
4166 	    && gui.which_scrollbars[SBAR_RIGHT])
4167     {
4168 	/*
4169 	 * If we have two scrollbars and one of them is being dragged, just
4170 	 * copy the scrollbar position from the dragged one to the other one.
4171 	 */
4172 	which_sb = SBAR_LEFT + SBAR_RIGHT - gui.dragged_sb;
4173 	if (gui.dragged_wp != NULL)
4174 	    gui_mch_set_scrollbar_thumb(
4175 		    &gui.dragged_wp->w_scrollbars[which_sb],
4176 		    gui.dragged_wp->w_scrollbars[0].value,
4177 		    gui.dragged_wp->w_scrollbars[0].size,
4178 		    gui.dragged_wp->w_scrollbars[0].max);
4179     }
4180 
4181     /* avoid that moving components around generates events */
4182     ++hold_gui_events;
4183 
4184     for (wp = firstwin; wp != NULL; wp = W_NEXT(wp))
4185     {
4186 	if (wp->w_buffer == NULL)	/* just in case */
4187 	    continue;
4188 	/* Skip a scrollbar that is being dragged. */
4189 	if (!force && (gui.dragged_sb == SBAR_LEFT
4190 					     || gui.dragged_sb == SBAR_RIGHT)
4191 		&& gui.dragged_wp == wp)
4192 	    continue;
4193 
4194 #ifdef SCROLL_PAST_END
4195 	max = wp->w_buffer->b_ml.ml_line_count - 1;
4196 #else
4197 	max = wp->w_buffer->b_ml.ml_line_count + wp->w_height - 2;
4198 #endif
4199 	if (max < 0)			/* empty buffer */
4200 	    max = 0;
4201 	val = wp->w_topline - 1;
4202 	size = wp->w_height;
4203 #ifdef SCROLL_PAST_END
4204 	if (val > max)			/* just in case */
4205 	    val = max;
4206 #else
4207 	if (size > max + 1)		/* just in case */
4208 	    size = max + 1;
4209 	if (val > max - size + 1)
4210 	    val = max - size + 1;
4211 #endif
4212 	if (val < 0)			/* minimal value is 0 */
4213 	    val = 0;
4214 
4215 	/*
4216 	 * Scrollbar at index 0 (the left one) contains all the information.
4217 	 * It would be the same info for left and right so we just store it for
4218 	 * one of them.
4219 	 */
4220 	sb = &wp->w_scrollbars[0];
4221 
4222 	/*
4223 	 * Note: no check for valid w_botline.	If it's not valid the
4224 	 * scrollbars will be updated later anyway.
4225 	 */
4226 	if (size < 1 || wp->w_botline - 2 > max)
4227 	{
4228 	    /*
4229 	     * This can happen during changing files.  Just don't update the
4230 	     * scrollbar for now.
4231 	     */
4232 	    sb->height = 0;	    /* Force update next time */
4233 	    if (gui.which_scrollbars[SBAR_LEFT])
4234 		gui_do_scrollbar(wp, SBAR_LEFT, FALSE);
4235 	    if (gui.which_scrollbars[SBAR_RIGHT])
4236 		gui_do_scrollbar(wp, SBAR_RIGHT, FALSE);
4237 	    continue;
4238 	}
4239 	if (force || sb->height != wp->w_height
4240 	    || sb->top != wp->w_winrow
4241 	    || sb->status_height != wp->w_status_height
4242 	    || sb->width != wp->w_width
4243 	    || prev_curwin != curwin)
4244 	{
4245 	    /* Height, width or position of scrollbar has changed.  For
4246 	     * vertical split: curwin changed. */
4247 	    sb->height = wp->w_height;
4248 	    sb->top = wp->w_winrow;
4249 	    sb->status_height = wp->w_status_height;
4250 	    sb->width = wp->w_width;
4251 
4252 	    /* Calculate height and position in pixels */
4253 	    h = (sb->height + sb->status_height) * gui.char_height;
4254 	    y = sb->top * gui.char_height + gui.border_offset;
4255 #if defined(FEAT_MENU) && !defined(FEAT_GUI_GTK) && !defined(FEAT_GUI_MOTIF) && !defined(FEAT_GUI_PHOTON)
4256 	    if (gui.menu_is_active)
4257 		y += gui.menu_height;
4258 #endif
4259 
4260 #if defined(FEAT_TOOLBAR) && (defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_ATHENA))
4261 	    if (vim_strchr(p_go, GO_TOOLBAR) != NULL)
4262 # ifdef FEAT_GUI_ATHENA
4263 		y += gui.toolbar_height;
4264 # else
4265 #  ifdef FEAT_GUI_MSWIN
4266 		y += TOOLBAR_BUTTON_HEIGHT + TOOLBAR_BORDER_HEIGHT;
4267 #  endif
4268 # endif
4269 #endif
4270 
4271 #if defined(FEAT_GUI_TABLINE) && defined(FEAT_GUI_MSWIN)
4272 	    if (gui_has_tabline())
4273 		y += gui.tabline_height;
4274 #endif
4275 
4276 	    if (wp->w_winrow == 0)
4277 	    {
4278 		/* Height of top scrollbar includes width of top border */
4279 		h += gui.border_offset;
4280 		y -= gui.border_offset;
4281 	    }
4282 	    if (gui.which_scrollbars[SBAR_LEFT])
4283 	    {
4284 		gui_mch_set_scrollbar_pos(&wp->w_scrollbars[SBAR_LEFT],
4285 					  gui.left_sbar_x, y,
4286 					  gui.scrollbar_width, h);
4287 		gui_do_scrollbar(wp, SBAR_LEFT, TRUE);
4288 	    }
4289 	    if (gui.which_scrollbars[SBAR_RIGHT])
4290 	    {
4291 		gui_mch_set_scrollbar_pos(&wp->w_scrollbars[SBAR_RIGHT],
4292 					  gui.right_sbar_x, y,
4293 					  gui.scrollbar_width, h);
4294 		gui_do_scrollbar(wp, SBAR_RIGHT, TRUE);
4295 	    }
4296 	}
4297 
4298 	/* Reduce the number of calls to gui_mch_set_scrollbar_thumb() by
4299 	 * checking if the thumb moved at least a pixel.  Only do this for
4300 	 * Athena, most other GUIs require the update anyway to make the
4301 	 * arrows work. */
4302 #ifdef FEAT_GUI_ATHENA
4303 	if (max == 0)
4304 	    y = 0;
4305 	else
4306 	    y = (val * (sb->height + 2) * gui.char_height + max / 2) / max;
4307 	if (force || sb->pixval != y || sb->size != size || sb->max != max)
4308 #else
4309 	if (force || sb->value != val || sb->size != size || sb->max != max)
4310 #endif
4311 	{
4312 	    /* Thumb of scrollbar has moved */
4313 	    sb->value = val;
4314 #ifdef FEAT_GUI_ATHENA
4315 	    sb->pixval = y;
4316 #endif
4317 	    sb->size = size;
4318 	    sb->max = max;
4319 	    if (gui.which_scrollbars[SBAR_LEFT]
4320 		    && (gui.dragged_sb != SBAR_LEFT || gui.dragged_wp != wp))
4321 		gui_mch_set_scrollbar_thumb(&wp->w_scrollbars[SBAR_LEFT],
4322 					    val, size, max);
4323 	    if (gui.which_scrollbars[SBAR_RIGHT]
4324 		    && (gui.dragged_sb != SBAR_RIGHT || gui.dragged_wp != wp))
4325 		gui_mch_set_scrollbar_thumb(&wp->w_scrollbars[SBAR_RIGHT],
4326 					    val, size, max);
4327 	}
4328     }
4329     prev_curwin = curwin;
4330     --hold_gui_events;
4331 }
4332 
4333 /*
4334  * Enable or disable a scrollbar.
4335  * Check for scrollbars for vertically split windows which are not enabled
4336  * sometimes.
4337  */
4338     static void
4339 gui_do_scrollbar(
4340     win_T	*wp,
4341     int		which,	    /* SBAR_LEFT or SBAR_RIGHT */
4342     int		enable)	    /* TRUE to enable scrollbar */
4343 {
4344     int		midcol = curwin->w_wincol + curwin->w_width / 2;
4345     int		has_midcol = (wp->w_wincol <= midcol
4346 				     && wp->w_wincol + wp->w_width >= midcol);
4347 
4348     /* Only enable scrollbars that contain the middle column of the current
4349      * window. */
4350     if (gui.which_scrollbars[SBAR_RIGHT] != gui.which_scrollbars[SBAR_LEFT])
4351     {
4352 	/* Scrollbars only on one side.  Don't enable scrollbars that don't
4353 	 * contain the middle column of the current window. */
4354 	if (!has_midcol)
4355 	    enable = FALSE;
4356     }
4357     else
4358     {
4359 	/* Scrollbars on both sides.  Don't enable scrollbars that neither
4360 	 * contain the middle column of the current window nor are on the far
4361 	 * side. */
4362 	if (midcol > Columns / 2)
4363 	{
4364 	    if (which == SBAR_LEFT ? wp->w_wincol != 0 : !has_midcol)
4365 		enable = FALSE;
4366 	}
4367 	else
4368 	{
4369 	    if (which == SBAR_RIGHT ? wp->w_wincol + wp->w_width != Columns
4370 								: !has_midcol)
4371 		enable = FALSE;
4372 	}
4373     }
4374     gui_mch_enable_scrollbar(&wp->w_scrollbars[which], enable);
4375 }
4376 
4377 /*
4378  * Scroll a window according to the values set in the globals current_scrollbar
4379  * and scrollbar_value.  Return TRUE if the cursor in the current window moved
4380  * or FALSE otherwise.
4381  */
4382     int
4383 gui_do_scroll(void)
4384 {
4385     win_T	*wp, *save_wp;
4386     int		i;
4387     long	nlines;
4388     pos_T	old_cursor;
4389     linenr_T	old_topline;
4390 #ifdef FEAT_DIFF
4391     int		old_topfill;
4392 #endif
4393 
4394     for (wp = firstwin, i = 0; i < current_scrollbar; wp = W_NEXT(wp), i++)
4395 	if (wp == NULL)
4396 	    break;
4397     if (wp == NULL)
4398 	/* Couldn't find window */
4399 	return FALSE;
4400 
4401     /*
4402      * Compute number of lines to scroll.  If zero, nothing to do.
4403      */
4404     nlines = (long)scrollbar_value + 1 - (long)wp->w_topline;
4405     if (nlines == 0)
4406 	return FALSE;
4407 
4408     save_wp = curwin;
4409     old_topline = wp->w_topline;
4410 #ifdef FEAT_DIFF
4411     old_topfill = wp->w_topfill;
4412 #endif
4413     old_cursor = wp->w_cursor;
4414     curwin = wp;
4415     curbuf = wp->w_buffer;
4416     if (nlines < 0)
4417 	scrolldown(-nlines, gui.dragged_wp == NULL);
4418     else
4419 	scrollup(nlines, gui.dragged_wp == NULL);
4420     /* Reset dragged_wp after using it.  "dragged_sb" will have been reset for
4421      * the mouse-up event already, but we still want it to behave like when
4422      * dragging.  But not the next click in an arrow. */
4423     if (gui.dragged_sb == SBAR_NONE)
4424 	gui.dragged_wp = NULL;
4425 
4426     if (old_topline != wp->w_topline
4427 #ifdef FEAT_DIFF
4428 	    || old_topfill != wp->w_topfill
4429 #endif
4430 	    )
4431     {
4432 	if (p_so != 0)
4433 	{
4434 	    cursor_correct();		/* fix window for 'so' */
4435 	    update_topline();		/* avoid up/down jump */
4436 	}
4437 	if (old_cursor.lnum != wp->w_cursor.lnum)
4438 	    coladvance(wp->w_curswant);
4439 #ifdef FEAT_SCROLLBIND
4440 	wp->w_scbind_pos = wp->w_topline;
4441 #endif
4442     }
4443 
4444     /* Make sure wp->w_leftcol and wp->w_skipcol are correct. */
4445     validate_cursor();
4446 
4447     curwin = save_wp;
4448     curbuf = save_wp->w_buffer;
4449 
4450     /*
4451      * Don't call updateWindow() when nothing has changed (it will overwrite
4452      * the status line!).
4453      */
4454     if (old_topline != wp->w_topline
4455 	    || wp->w_redr_type != 0
4456 #ifdef FEAT_DIFF
4457 	    || old_topfill != wp->w_topfill
4458 #endif
4459 	    )
4460     {
4461 	int type = VALID;
4462 
4463 #ifdef FEAT_INS_EXPAND
4464 	if (pum_visible())
4465 	{
4466 	    type = NOT_VALID;
4467 	    wp->w_lines_valid = 0;
4468 	}
4469 #endif
4470 	/* Don't set must_redraw here, it may cause the popup menu to
4471 	 * disappear when losing focus after a scrollbar drag. */
4472 	if (wp->w_redr_type < type)
4473 	    wp->w_redr_type = type;
4474 	updateWindow(wp);   /* update window, status line, and cmdline */
4475     }
4476 
4477 #ifdef FEAT_INS_EXPAND
4478     /* May need to redraw the popup menu. */
4479     if (pum_visible())
4480 	pum_redraw();
4481 #endif
4482 
4483     return (wp == curwin && !EQUAL_POS(curwin->w_cursor, old_cursor));
4484 }
4485 
4486 
4487 /*
4488  * Horizontal scrollbar stuff:
4489  */
4490 
4491 /*
4492  * Return length of line "lnum" for horizontal scrolling.
4493  */
4494     static colnr_T
4495 scroll_line_len(linenr_T lnum)
4496 {
4497     char_u	*p;
4498     colnr_T	col;
4499     int		w;
4500 
4501     p = ml_get(lnum);
4502     col = 0;
4503     if (*p != NUL)
4504 	for (;;)
4505 	{
4506 	    w = chartabsize(p, col);
4507 	    MB_PTR_ADV(p);
4508 	    if (*p == NUL)		/* don't count the last character */
4509 		break;
4510 	    col += w;
4511 	}
4512     return col;
4513 }
4514 
4515 /* Remember which line is currently the longest, so that we don't have to
4516  * search for it when scrolling horizontally. */
4517 static linenr_T longest_lnum = 0;
4518 
4519 /*
4520  * Find longest visible line number.  If this is not possible (or not desired,
4521  * by setting 'h' in "guioptions") then the current line number is returned.
4522  */
4523     static linenr_T
4524 gui_find_longest_lnum(void)
4525 {
4526     linenr_T ret = 0;
4527 
4528     /* Calculate maximum for horizontal scrollbar.  Check for reasonable
4529      * line numbers, topline and botline can be invalid when displaying is
4530      * postponed. */
4531     if (vim_strchr(p_go, GO_HORSCROLL) == NULL
4532 	    && curwin->w_topline <= curwin->w_cursor.lnum
4533 	    && curwin->w_botline > curwin->w_cursor.lnum
4534 	    && curwin->w_botline <= curbuf->b_ml.ml_line_count + 1)
4535     {
4536 	linenr_T    lnum;
4537 	colnr_T	    n;
4538 	long	    max = 0;
4539 
4540 	/* Use maximum of all visible lines.  Remember the lnum of the
4541 	 * longest line, closest to the cursor line.  Used when scrolling
4542 	 * below. */
4543 	for (lnum = curwin->w_topline; lnum < curwin->w_botline; ++lnum)
4544 	{
4545 	    n = scroll_line_len(lnum);
4546 	    if (n > (colnr_T)max)
4547 	    {
4548 		max = n;
4549 		ret = lnum;
4550 	    }
4551 	    else if (n == (colnr_T)max
4552 		    && abs((int)(lnum - curwin->w_cursor.lnum))
4553 		       < abs((int)(ret - curwin->w_cursor.lnum)))
4554 		ret = lnum;
4555 	}
4556     }
4557     else
4558 	/* Use cursor line only. */
4559 	ret = curwin->w_cursor.lnum;
4560 
4561     return ret;
4562 }
4563 
4564     static void
4565 gui_update_horiz_scrollbar(int force)
4566 {
4567     long	value, size, max;	/* need 32 bit ints here */
4568 
4569     if (!gui.which_scrollbars[SBAR_BOTTOM])
4570 	return;
4571 
4572     if (!force && gui.dragged_sb == SBAR_BOTTOM)
4573 	return;
4574 
4575     if (!force && curwin->w_p_wrap && gui.prev_wrap)
4576 	return;
4577 
4578     /*
4579      * It is possible for the cursor to be invalid if we're in the middle of
4580      * something (like changing files).  If so, don't do anything for now.
4581      */
4582     if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
4583     {
4584 	gui.bottom_sbar.value = -1;
4585 	return;
4586     }
4587 
4588     size = curwin->w_width;
4589     if (curwin->w_p_wrap)
4590     {
4591 	value = 0;
4592 #ifdef SCROLL_PAST_END
4593 	max = 0;
4594 #else
4595 	max = curwin->w_width - 1;
4596 #endif
4597     }
4598     else
4599     {
4600 	value = curwin->w_leftcol;
4601 
4602 	longest_lnum = gui_find_longest_lnum();
4603 	max = scroll_line_len(longest_lnum);
4604 
4605 #ifdef FEAT_VIRTUALEDIT
4606 	if (virtual_active())
4607 	{
4608 	    /* May move the cursor even further to the right. */
4609 	    if (curwin->w_virtcol >= (colnr_T)max)
4610 		max = curwin->w_virtcol;
4611 	}
4612 #endif
4613 
4614 #ifndef SCROLL_PAST_END
4615 	max += curwin->w_width - 1;
4616 #endif
4617 	/* The line number isn't scrolled, thus there is less space when
4618 	 * 'number' or 'relativenumber' is set (also for 'foldcolumn'). */
4619 	size -= curwin_col_off();
4620 #ifndef SCROLL_PAST_END
4621 	max -= curwin_col_off();
4622 #endif
4623     }
4624 
4625 #ifndef SCROLL_PAST_END
4626     if (value > max - size + 1)
4627 	value = max - size + 1;	    /* limit the value to allowable range */
4628 #endif
4629 
4630 #ifdef FEAT_RIGHTLEFT
4631     if (curwin->w_p_rl)
4632     {
4633 	value = max + 1 - size - value;
4634 	if (value < 0)
4635 	{
4636 	    size += value;
4637 	    value = 0;
4638 	}
4639     }
4640 #endif
4641     if (!force && value == gui.bottom_sbar.value && size == gui.bottom_sbar.size
4642 						&& max == gui.bottom_sbar.max)
4643 	return;
4644 
4645     gui.bottom_sbar.value = value;
4646     gui.bottom_sbar.size = size;
4647     gui.bottom_sbar.max = max;
4648     gui.prev_wrap = curwin->w_p_wrap;
4649 
4650     gui_mch_set_scrollbar_thumb(&gui.bottom_sbar, value, size, max);
4651 }
4652 
4653 /*
4654  * Do a horizontal scroll.  Return TRUE if the cursor moved, FALSE otherwise.
4655  */
4656     int
4657 gui_do_horiz_scroll(long_u leftcol, int compute_longest_lnum)
4658 {
4659     /* no wrapping, no scrolling */
4660     if (curwin->w_p_wrap)
4661 	return FALSE;
4662 
4663     if (curwin->w_leftcol == (colnr_T)leftcol)
4664 	return FALSE;
4665 
4666     curwin->w_leftcol = (colnr_T)leftcol;
4667 
4668     /* When the line of the cursor is too short, move the cursor to the
4669      * longest visible line. */
4670     if (vim_strchr(p_go, GO_HORSCROLL) == NULL
4671 	    && !virtual_active()
4672 	    && (colnr_T)leftcol > scroll_line_len(curwin->w_cursor.lnum))
4673     {
4674 	if (compute_longest_lnum)
4675 	{
4676 	    curwin->w_cursor.lnum = gui_find_longest_lnum();
4677 	    curwin->w_cursor.col = 0;
4678 	}
4679 	/* Do a sanity check on "longest_lnum", just in case. */
4680 	else if (longest_lnum >= curwin->w_topline
4681 		&& longest_lnum < curwin->w_botline)
4682 	{
4683 	    curwin->w_cursor.lnum = longest_lnum;
4684 	    curwin->w_cursor.col = 0;
4685 	}
4686     }
4687 
4688     return leftcol_changed();
4689 }
4690 
4691 /*
4692  * Check that none of the colors are the same as the background color
4693  */
4694     void
4695 gui_check_colors(void)
4696 {
4697     if (gui.norm_pixel == gui.back_pixel || gui.norm_pixel == INVALCOLOR)
4698     {
4699 	gui_set_bg_color((char_u *)"White");
4700 	if (gui.norm_pixel == gui.back_pixel || gui.norm_pixel == INVALCOLOR)
4701 	    gui_set_fg_color((char_u *)"Black");
4702     }
4703 }
4704 
4705     static void
4706 gui_set_fg_color(char_u *name)
4707 {
4708     gui.norm_pixel = gui_get_color(name);
4709     hl_set_fg_color_name(vim_strsave(name));
4710 }
4711 
4712     static void
4713 gui_set_bg_color(char_u *name)
4714 {
4715     gui.back_pixel = gui_get_color(name);
4716     hl_set_bg_color_name(vim_strsave(name));
4717 }
4718 
4719 /*
4720  * Allocate a color by name.
4721  * Returns INVALCOLOR and gives an error message when failed.
4722  */
4723     guicolor_T
4724 gui_get_color(char_u *name)
4725 {
4726     guicolor_T	t;
4727 
4728     if (*name == NUL)
4729 	return INVALCOLOR;
4730     t = gui_mch_get_color(name);
4731 
4732     if (t == INVALCOLOR
4733 #if defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK)
4734 	    && gui.in_use
4735 #endif
4736 	    )
4737 	EMSG2(_("E254: Cannot allocate color %s"), name);
4738     return t;
4739 }
4740 
4741 /*
4742  * Return the grey value of a color (range 0-255).
4743  */
4744     int
4745 gui_get_lightness(guicolor_T pixel)
4746 {
4747     long_u	rgb = (long_u)gui_mch_get_rgb(pixel);
4748 
4749     return  (int)(  (((rgb >> 16) & 0xff) * 299)
4750 		   + (((rgb >> 8) & 0xff) * 587)
4751 		   +  ((rgb	  & 0xff) * 114)) / 1000;
4752 }
4753 
4754 #if defined(FEAT_GUI_X11) || defined(PROTO)
4755     void
4756 gui_new_scrollbar_colors(void)
4757 {
4758     win_T	*wp;
4759 
4760     /* Nothing to do if GUI hasn't started yet. */
4761     if (!gui.in_use)
4762 	return;
4763 
4764     FOR_ALL_WINDOWS(wp)
4765     {
4766 	gui_mch_set_scrollbar_colors(&(wp->w_scrollbars[SBAR_LEFT]));
4767 	gui_mch_set_scrollbar_colors(&(wp->w_scrollbars[SBAR_RIGHT]));
4768     }
4769     gui_mch_set_scrollbar_colors(&gui.bottom_sbar);
4770 }
4771 #endif
4772 
4773 /*
4774  * Call this when focus has changed.
4775  */
4776     void
4777 gui_focus_change(int in_focus)
4778 {
4779 /*
4780  * Skip this code to avoid drawing the cursor when debugging and switching
4781  * between the debugger window and gvim.
4782  */
4783 #if 1
4784     gui.in_focus = in_focus;
4785     out_flush();		/* make sure output has been written */
4786     gui_update_cursor(TRUE, FALSE);
4787 
4788 # ifdef FEAT_XIM
4789     xim_set_focus(in_focus);
4790 # endif
4791 
4792     /* Put events in the input queue only when allowed.
4793      * ui_focus_change() isn't called directly, because it invokes
4794      * autocommands and that must not happen asynchronously. */
4795     if (!hold_gui_events)
4796     {
4797 	char_u  bytes[3];
4798 
4799 	bytes[0] = CSI;
4800 	bytes[1] = KS_EXTRA;
4801 	bytes[2] = in_focus ? (int)KE_FOCUSGAINED : (int)KE_FOCUSLOST;
4802 	add_to_input_buf(bytes, 3);
4803     }
4804 #endif
4805 }
4806 
4807 /*
4808  * Called when the mouse moved (but not when dragging).
4809  */
4810     void
4811 gui_mouse_moved(int x, int y)
4812 {
4813     win_T	*wp;
4814     char_u	st[8];
4815 
4816     /* Ignore this while still starting up. */
4817     if (!gui.in_use || gui.starting)
4818 	return;
4819 
4820 #ifdef FEAT_MOUSESHAPE
4821     /* Get window pointer, and update mouse shape as well. */
4822     wp = xy2win(x, y);
4823 #endif
4824 
4825     /* Only handle this when 'mousefocus' set and ... */
4826     if (p_mousef
4827 	    && !hold_gui_events		/* not holding events */
4828 	    && (State & (NORMAL|INSERT))/* Normal/Visual/Insert mode */
4829 	    && State != HITRETURN	/* but not hit-return prompt */
4830 	    && msg_scrolled == 0	/* no scrolled message */
4831 	    && !need_mouse_correct	/* not moving the pointer */
4832 	    && gui.in_focus)		/* gvim in focus */
4833     {
4834 	/* Don't move the mouse when it's left or right of the Vim window */
4835 	if (x < 0 || x > Columns * gui.char_width)
4836 	    return;
4837 #ifndef FEAT_MOUSESHAPE
4838 	wp = xy2win(x, y);
4839 #endif
4840 	if (wp == curwin || wp == NULL)
4841 	    return;	/* still in the same old window, or none at all */
4842 
4843 	/* Ignore position in the tab pages line. */
4844 	if (Y_2_ROW(y) < tabline_height())
4845 	    return;
4846 
4847 	/*
4848 	 * format a mouse click on status line input
4849 	 * ala gui_send_mouse_event(0, x, y, 0, 0);
4850 	 * Trick: Use a column number -1, so that get_pseudo_mouse_code() will
4851 	 * generate a K_LEFTMOUSE_NM key code.
4852 	 */
4853 	if (finish_op)
4854 	{
4855 	    /* abort the current operator first */
4856 	    st[0] = ESC;
4857 	    add_to_input_buf(st, 1);
4858 	}
4859 	st[0] = CSI;
4860 	st[1] = KS_MOUSE;
4861 	st[2] = KE_FILLER;
4862 	st[3] = (char_u)MOUSE_LEFT;
4863 	fill_mouse_coord(st + 4,
4864 		wp->w_wincol == 0 ? -1 : wp->w_wincol + MOUSE_COLOFF,
4865 		wp->w_height + W_WINROW(wp));
4866 
4867 	add_to_input_buf(st, 8);
4868 	st[3] = (char_u)MOUSE_RELEASE;
4869 	add_to_input_buf(st, 8);
4870 #ifdef FEAT_GUI_GTK
4871 	/* Need to wake up the main loop */
4872 	if (gtk_main_level() > 0)
4873 	    gtk_main_quit();
4874 #endif
4875     }
4876 }
4877 
4878 /*
4879  * Called when mouse should be moved to window with focus.
4880  */
4881     void
4882 gui_mouse_correct(void)
4883 {
4884     int		x, y;
4885     win_T	*wp = NULL;
4886 
4887     need_mouse_correct = FALSE;
4888 
4889     if (!(gui.in_use && p_mousef))
4890 	return;
4891 
4892     gui_mch_getmouse(&x, &y);
4893     /* Don't move the mouse when it's left or right of the Vim window */
4894     if (x < 0 || x > Columns * gui.char_width)
4895 	return;
4896     if (y >= 0 && Y_2_ROW(y) >= tabline_height())
4897 	wp = xy2win(x, y);
4898     if (wp != curwin && wp != NULL)	/* If in other than current window */
4899     {
4900 	validate_cline_row();
4901 	gui_mch_setmouse((int)W_ENDCOL(curwin) * gui.char_width - 3,
4902 		(W_WINROW(curwin) + curwin->w_wrow) * gui.char_height
4903 						     + (gui.char_height) / 2);
4904     }
4905 }
4906 
4907 /*
4908  * Find window where the mouse pointer "x" / "y" coordinate is in.
4909  */
4910     static win_T *
4911 xy2win(int x UNUSED, int y UNUSED)
4912 {
4913     int		row;
4914     int		col;
4915     win_T	*wp;
4916 
4917     row = Y_2_ROW(y);
4918     col = X_2_COL(x);
4919     if (row < 0 || col < 0)		/* before first window */
4920 	return NULL;
4921     wp = mouse_find_win(&row, &col);
4922     if (wp == NULL)
4923 	return NULL;
4924 #ifdef FEAT_MOUSESHAPE
4925     if (State == HITRETURN || State == ASKMORE)
4926     {
4927 	if (Y_2_ROW(y) >= msg_row)
4928 	    update_mouseshape(SHAPE_IDX_MOREL);
4929 	else
4930 	    update_mouseshape(SHAPE_IDX_MORE);
4931     }
4932     else if (row > wp->w_height)	/* below status line */
4933 	update_mouseshape(SHAPE_IDX_CLINE);
4934     else if (!(State & CMDLINE) && wp->w_vsep_width > 0 && col == wp->w_width
4935 	    && (row != wp->w_height || !stl_connected(wp)) && msg_scrolled == 0)
4936 	update_mouseshape(SHAPE_IDX_VSEP);
4937     else if (!(State & CMDLINE) && wp->w_status_height > 0
4938 				  && row == wp->w_height && msg_scrolled == 0)
4939 	update_mouseshape(SHAPE_IDX_STATUS);
4940     else
4941 	update_mouseshape(-2);
4942 #endif
4943     return wp;
4944 }
4945 
4946 /*
4947  * ":gui" and ":gvim": Change from the terminal version to the GUI version.
4948  * File names may be given to redefine the args list.
4949  */
4950     void
4951 ex_gui(exarg_T *eap)
4952 {
4953     char_u	*arg = eap->arg;
4954 
4955     /*
4956      * Check for "-f" argument: foreground, don't fork.
4957      * Also don't fork when started with "gvim -f".
4958      * Do fork when using "gui -b".
4959      */
4960     if (arg[0] == '-'
4961 	    && (arg[1] == 'f' || arg[1] == 'b')
4962 	    && (arg[2] == NUL || VIM_ISWHITE(arg[2])))
4963     {
4964 	gui.dofork = (arg[1] == 'b');
4965 	eap->arg = skipwhite(eap->arg + 2);
4966     }
4967     if (!gui.in_use)
4968     {
4969 	/* Clear the command.  Needed for when forking+exiting, to avoid part
4970 	 * of the argument ending up after the shell prompt. */
4971 	msg_clr_eos_force();
4972 	gui_start();
4973 #ifdef FEAT_JOB_CHANNEL
4974 	channel_gui_register_all();
4975 #endif
4976     }
4977     if (!ends_excmd(*eap->arg))
4978 	ex_next(eap);
4979 }
4980 
4981 #if ((defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK) || defined(FEAT_GUI_W32) \
4982 	|| defined(FEAT_GUI_PHOTON)) && defined(FEAT_TOOLBAR)) || defined(PROTO)
4983 /*
4984  * This is shared between Athena, Motif and GTK.
4985  */
4986 static void gfp_setname(char_u *fname, void *cookie);
4987 
4988 /*
4989  * Callback function for do_in_runtimepath().
4990  */
4991     static void
4992 gfp_setname(char_u *fname, void *cookie)
4993 {
4994     char_u	*gfp_buffer = cookie;
4995 
4996     if (STRLEN(fname) >= MAXPATHL)
4997 	*gfp_buffer = NUL;
4998     else
4999 	STRCPY(gfp_buffer, fname);
5000 }
5001 
5002 /*
5003  * Find the path of bitmap "name" with extension "ext" in 'runtimepath'.
5004  * Return FAIL for failure and OK if buffer[MAXPATHL] contains the result.
5005  */
5006     int
5007 gui_find_bitmap(char_u *name, char_u *buffer, char *ext)
5008 {
5009     if (STRLEN(name) > MAXPATHL - 14)
5010 	return FAIL;
5011     vim_snprintf((char *)buffer, MAXPATHL, "bitmaps/%s.%s", name, ext);
5012     if (do_in_runtimepath(buffer, 0, gfp_setname, buffer) == FAIL
5013 							    || *buffer == NUL)
5014 	return FAIL;
5015     return OK;
5016 }
5017 
5018 # if !defined(FEAT_GUI_GTK) || defined(PROTO)
5019 /*
5020  * Given the name of the "icon=" argument, try finding the bitmap file for the
5021  * icon.  If it is an absolute path name, use it as it is.  Otherwise append
5022  * "ext" and search for it in 'runtimepath'.
5023  * The result is put in "buffer[MAXPATHL]".  If something fails "buffer"
5024  * contains "name".
5025  */
5026     void
5027 gui_find_iconfile(char_u *name, char_u *buffer, char *ext)
5028 {
5029     char_u	buf[MAXPATHL + 1];
5030 
5031     expand_env(name, buffer, MAXPATHL);
5032     if (!mch_isFullName(buffer) && gui_find_bitmap(buffer, buf, ext) == OK)
5033 	STRCPY(buffer, buf);
5034 }
5035 # endif
5036 #endif
5037 
5038 #if defined(FEAT_GUI_GTK) || defined(FEAT_GUI_X11) || defined(PROTO)
5039     void
5040 display_errors(void)
5041 {
5042     char_u	*p;
5043 
5044     if (isatty(2))
5045 	fflush(stderr);
5046     else if (error_ga.ga_data != NULL)
5047     {
5048 	/* avoid putting up a message box with blanks only */
5049 	for (p = (char_u *)error_ga.ga_data; *p != NUL; ++p)
5050 	    if (!isspace(*p))
5051 	    {
5052 		/* Truncate a very long message, it will go off-screen. */
5053 		if (STRLEN(p) > 2000)
5054 		    STRCPY(p + 2000 - 14, "...(truncated)");
5055 		(void)do_dialog(VIM_ERROR, (char_u *)_("Error"),
5056 				       p, (char_u *)_("&Ok"), 1, NULL, FALSE);
5057 		break;
5058 	    }
5059 	ga_clear(&error_ga);
5060     }
5061 }
5062 #endif
5063 
5064 #if defined(NO_CONSOLE_INPUT) || defined(PROTO)
5065 /*
5066  * Return TRUE if still starting up and there is no place to enter text.
5067  * For GTK and X11 we check if stderr is not a tty, which means we were
5068  * (probably) started from the desktop.  Also check stdin, "vim >& file" does
5069  * allow typing on stdin.
5070  */
5071     int
5072 no_console_input(void)
5073 {
5074     return ((!gui.in_use || gui.starting)
5075 # ifndef NO_CONSOLE
5076 	    && !isatty(0) && !isatty(2)
5077 # endif
5078 	    );
5079 }
5080 #endif
5081 
5082 #if defined(FIND_REPLACE_DIALOG) || defined(FEAT_SUN_WORKSHOP) \
5083 	|| defined(NEED_GUI_UPDATE_SCREEN) \
5084 	|| defined(PROTO)
5085 /*
5086  * Update the current window and the screen.
5087  */
5088     void
5089 gui_update_screen(void)
5090 {
5091 #ifdef FEAT_CONCEAL
5092     linenr_T	conceal_old_cursor_line = 0;
5093     linenr_T	conceal_new_cursor_line = 0;
5094     int		conceal_update_lines = FALSE;
5095 #endif
5096 
5097     update_topline();
5098     validate_cursor();
5099 
5100 #if defined(FEAT_AUTOCMD) || defined(FEAT_CONCEAL)
5101     /* Trigger CursorMoved if the cursor moved. */
5102     if (!finish_op && (
5103 # ifdef FEAT_AUTOCMD
5104 		has_cursormoved()
5105 # endif
5106 # if defined(FEAT_AUTOCMD) && defined(FEAT_CONCEAL)
5107 		||
5108 # endif
5109 # ifdef FEAT_CONCEAL
5110 		curwin->w_p_cole > 0
5111 # endif
5112 		)
5113 		     && !EQUAL_POS(last_cursormoved, curwin->w_cursor))
5114     {
5115 # ifdef FEAT_AUTOCMD
5116 	if (has_cursormoved())
5117 	    apply_autocmds(EVENT_CURSORMOVED, NULL, NULL, FALSE, curbuf);
5118 # endif
5119 # ifdef FEAT_CONCEAL
5120 	if (curwin->w_p_cole > 0)
5121 	{
5122 	    conceal_old_cursor_line = last_cursormoved.lnum;
5123 	    conceal_new_cursor_line = curwin->w_cursor.lnum;
5124 	    conceal_update_lines = TRUE;
5125 	}
5126 # endif
5127 	last_cursormoved = curwin->w_cursor;
5128     }
5129 #endif
5130 
5131     update_screen(0);	/* may need to update the screen */
5132     setcursor();
5133 # if defined(FEAT_CONCEAL)
5134     if (conceal_update_lines
5135 	    && (conceal_old_cursor_line != conceal_new_cursor_line
5136 		|| conceal_cursor_line(curwin)
5137 		|| need_cursor_line_redraw))
5138     {
5139 	if (conceal_old_cursor_line != conceal_new_cursor_line)
5140 	    update_single_line(curwin, conceal_old_cursor_line);
5141 	update_single_line(curwin, conceal_new_cursor_line);
5142 	curwin->w_valid &= ~VALID_CROW;
5143     }
5144 # endif
5145     out_flush();		/* make sure output has been written */
5146     gui_update_cursor(TRUE, FALSE);
5147     gui_mch_flush();
5148 }
5149 #endif
5150 
5151 #if defined(FIND_REPLACE_DIALOG) || defined(PROTO)
5152 static void concat_esc(garray_T *gap, char_u *text, int what);
5153 
5154 /*
5155  * Get the text to use in a find/replace dialog.  Uses the last search pattern
5156  * if the argument is empty.
5157  * Returns an allocated string.
5158  */
5159     char_u *
5160 get_find_dialog_text(
5161     char_u	*arg,
5162     int		*wwordp,	/* return: TRUE if \< \> found */
5163     int		*mcasep)	/* return: TRUE if \C found */
5164 {
5165     char_u	*text;
5166 
5167     if (*arg == NUL)
5168 	text = last_search_pat();
5169     else
5170 	text = arg;
5171     if (text != NULL)
5172     {
5173 	text = vim_strsave(text);
5174 	if (text != NULL)
5175 	{
5176 	    int len = (int)STRLEN(text);
5177 	    int i;
5178 
5179 	    /* Remove "\V" */
5180 	    if (len >= 2 && STRNCMP(text, "\\V", 2) == 0)
5181 	    {
5182 		mch_memmove(text, text + 2, (size_t)(len - 1));
5183 		len -= 2;
5184 	    }
5185 
5186 	    /* Recognize "\c" and "\C" and remove. */
5187 	    if (len >= 2 && *text == '\\' && (text[1] == 'c' || text[1] == 'C'))
5188 	    {
5189 		*mcasep = (text[1] == 'C');
5190 		mch_memmove(text, text + 2, (size_t)(len - 1));
5191 		len -= 2;
5192 	    }
5193 
5194 	    /* Recognize "\<text\>" and remove. */
5195 	    if (len >= 4
5196 		    && STRNCMP(text, "\\<", 2) == 0
5197 		    && STRNCMP(text + len - 2, "\\>", 2) == 0)
5198 	    {
5199 		*wwordp = TRUE;
5200 		mch_memmove(text, text + 2, (size_t)(len - 4));
5201 		text[len - 4] = NUL;
5202 	    }
5203 
5204 	    /* Recognize "\/" or "\?" and remove. */
5205 	    for (i = 0; i + 1 < len; ++i)
5206 		if (text[i] == '\\' && (text[i + 1] == '/'
5207 						       || text[i + 1] == '?'))
5208 		{
5209 		    mch_memmove(text + i, text + i + 1, (size_t)(len - i));
5210 		    --len;
5211 		}
5212 	}
5213     }
5214     return text;
5215 }
5216 
5217 /*
5218  * Concatenate "text" to grow array "gap", escaping "what" with a backslash.
5219  */
5220     static void
5221 concat_esc(garray_T *gap, char_u *text, int what)
5222 {
5223     while (*text != NUL)
5224     {
5225 #ifdef FEAT_MBYTE
5226 	int l = (*mb_ptr2len)(text);
5227 
5228 	if (l > 1)
5229 	{
5230 	    while (--l >= 0)
5231 		ga_append(gap, *text++);
5232 	    continue;
5233 	}
5234 #endif
5235 	if (*text == what)
5236 	    ga_append(gap, '\\');
5237 	ga_append(gap, *text);
5238 	++text;
5239     }
5240 }
5241 
5242 /*
5243  * Handle the press of a button in the find-replace dialog.
5244  * Return TRUE when something was added to the input buffer.
5245  */
5246     int
5247 gui_do_findrepl(
5248     int		flags,		/* one of FRD_REPLACE, FRD_FINDNEXT, etc. */
5249     char_u	*find_text,
5250     char_u	*repl_text,
5251     int		down)		/* Search downwards. */
5252 {
5253     garray_T	ga;
5254     int		i;
5255     int		type = (flags & FRD_TYPE_MASK);
5256     char_u	*p;
5257     regmatch_T	regmatch;
5258     int		save_did_emsg = did_emsg;
5259     static int  busy = FALSE;
5260 
5261     /* When the screen is being updated we should not change buffers and
5262      * windows structures, it may cause freed memory to be used.  Also don't
5263      * do this recursively (pressing "Find" quickly several times. */
5264     if (updating_screen || busy)
5265 	return FALSE;
5266 
5267     /* refuse replace when text cannot be changed */
5268     if ((type == FRD_REPLACE || type == FRD_REPLACEALL) && text_locked())
5269 	return FALSE;
5270 
5271     busy = TRUE;
5272 
5273     ga_init2(&ga, 1, 100);
5274     if (type == FRD_REPLACEALL)
5275 	ga_concat(&ga, (char_u *)"%s/");
5276 
5277     ga_concat(&ga, (char_u *)"\\V");
5278     if (flags & FRD_MATCH_CASE)
5279 	ga_concat(&ga, (char_u *)"\\C");
5280     else
5281 	ga_concat(&ga, (char_u *)"\\c");
5282     if (flags & FRD_WHOLE_WORD)
5283 	ga_concat(&ga, (char_u *)"\\<");
5284     if (type == FRD_REPLACEALL || down)
5285 	concat_esc(&ga, find_text, '/');	/* escape slashes */
5286     else
5287 	concat_esc(&ga, find_text, '?');	/* escape '?' */
5288     if (flags & FRD_WHOLE_WORD)
5289 	ga_concat(&ga, (char_u *)"\\>");
5290 
5291     if (type == FRD_REPLACEALL)
5292     {
5293 	ga_concat(&ga, (char_u *)"/");
5294 						/* escape / and \ */
5295 	p = vim_strsave_escaped(repl_text, (char_u *)"/\\");
5296 	if (p != NULL)
5297 	    ga_concat(&ga, p);
5298 	vim_free(p);
5299 	ga_concat(&ga, (char_u *)"/g");
5300     }
5301     ga_append(&ga, NUL);
5302 
5303     if (type == FRD_REPLACE)
5304     {
5305 	/* Do the replacement when the text at the cursor matches.  Thus no
5306 	 * replacement is done if the cursor was moved! */
5307 	regmatch.regprog = vim_regcomp(ga.ga_data, RE_MAGIC + RE_STRING);
5308 	regmatch.rm_ic = 0;
5309 	if (regmatch.regprog != NULL)
5310 	{
5311 	    p = ml_get_cursor();
5312 	    if (vim_regexec_nl(&regmatch, p, (colnr_T)0)
5313 						   && regmatch.startp[0] == p)
5314 	    {
5315 		/* Clear the command line to remove any old "No match"
5316 		 * error. */
5317 		msg_end_prompt();
5318 
5319 		if (u_save_cursor() == OK)
5320 		{
5321 		    /* A button was pressed thus undo should be synced. */
5322 		    u_sync(FALSE);
5323 
5324 		    del_bytes((long)(regmatch.endp[0] - regmatch.startp[0]),
5325 								FALSE, FALSE);
5326 		    ins_str(repl_text);
5327 		}
5328 	    }
5329 	    else
5330 		MSG(_("No match at cursor, finding next"));
5331 	    vim_regfree(regmatch.regprog);
5332 	}
5333     }
5334 
5335     if (type == FRD_REPLACEALL)
5336     {
5337 	/* A button was pressed, thus undo should be synced. */
5338 	u_sync(FALSE);
5339 	do_cmdline_cmd(ga.ga_data);
5340     }
5341     else
5342     {
5343 	int searchflags = SEARCH_MSG + SEARCH_MARK;
5344 
5345 	/* Search for the next match.
5346 	 * Don't skip text under cursor for single replace. */
5347 	if (type == FRD_REPLACE)
5348 	    searchflags += SEARCH_START;
5349 	i = msg_scroll;
5350 	(void)do_search(NULL, down ? '/' : '?', ga.ga_data, 1L,
5351 						      searchflags, NULL, NULL);
5352 	msg_scroll = i;	    /* don't let an error message set msg_scroll */
5353     }
5354 
5355     /* Don't want to pass did_emsg to other code, it may cause disabling
5356      * syntax HL if we were busy redrawing. */
5357     did_emsg = save_did_emsg;
5358 
5359     if (State & (NORMAL | INSERT))
5360     {
5361 	gui_update_screen();		/* update the screen */
5362 	msg_didout = 0;			/* overwrite any message */
5363 	need_wait_return = FALSE;	/* don't wait for return */
5364     }
5365 
5366     vim_free(ga.ga_data);
5367     busy = FALSE;
5368     return (ga.ga_len > 0);
5369 }
5370 
5371 #endif
5372 
5373 #if (defined(FEAT_DND) && defined(FEAT_GUI_GTK)) \
5374 	|| defined(FEAT_GUI_MSWIN) \
5375 	|| defined(FEAT_GUI_MAC) \
5376 	|| defined(PROTO)
5377 
5378 static void gui_wingoto_xy(int x, int y);
5379 
5380 /*
5381  * Jump to the window at specified point (x, y).
5382  */
5383     static void
5384 gui_wingoto_xy(int x, int y)
5385 {
5386     int		row = Y_2_ROW(y);
5387     int		col = X_2_COL(x);
5388     win_T	*wp;
5389 
5390     if (row >= 0 && col >= 0)
5391     {
5392 	wp = mouse_find_win(&row, &col);
5393 	if (wp != NULL && wp != curwin)
5394 	    win_goto(wp);
5395     }
5396 }
5397 
5398 /*
5399  * Process file drop.  Mouse cursor position, key modifiers, name of files
5400  * and count of files are given.  Argument "fnames[count]" has full pathnames
5401  * of dropped files, they will be freed in this function, and caller can't use
5402  * fnames after call this function.
5403  */
5404     void
5405 gui_handle_drop(
5406     int		x UNUSED,
5407     int		y UNUSED,
5408     int_u	modifiers,
5409     char_u	**fnames,
5410     int		count)
5411 {
5412     int		i;
5413     char_u	*p;
5414     static int	entered = FALSE;
5415 
5416     /*
5417      * This function is called by event handlers.  Just in case we get a
5418      * second event before the first one is handled, ignore the second one.
5419      * Not sure if this can ever happen, just in case.
5420      */
5421     if (entered)
5422 	return;
5423     entered = TRUE;
5424 
5425     /*
5426      * When the cursor is at the command line, add the file names to the
5427      * command line, don't edit the files.
5428      */
5429     if (State & CMDLINE)
5430     {
5431 	shorten_filenames(fnames, count);
5432 	for (i = 0; i < count; ++i)
5433 	{
5434 	    if (fnames[i] != NULL)
5435 	    {
5436 		if (i > 0)
5437 		    add_to_input_buf((char_u*)" ", 1);
5438 
5439 		/* We don't know what command is used thus we can't be sure
5440 		 * about which characters need to be escaped.  Only escape the
5441 		 * most common ones. */
5442 # ifdef BACKSLASH_IN_FILENAME
5443 		p = vim_strsave_escaped(fnames[i], (char_u *)" \t\"|");
5444 # else
5445 		p = vim_strsave_escaped(fnames[i], (char_u *)"\\ \t\"|");
5446 # endif
5447 		if (p != NULL)
5448 		    add_to_input_buf_csi(p, (int)STRLEN(p));
5449 		vim_free(p);
5450 		vim_free(fnames[i]);
5451 	    }
5452 	}
5453 	vim_free(fnames);
5454     }
5455     else
5456     {
5457 	/* Go to the window under mouse cursor, then shorten given "fnames" by
5458 	 * current window, because a window can have local current dir. */
5459 	gui_wingoto_xy(x, y);
5460 	shorten_filenames(fnames, count);
5461 
5462 	/* If Shift held down, remember the first item. */
5463 	if ((modifiers & MOUSE_SHIFT) != 0)
5464 	    p = vim_strsave(fnames[0]);
5465 	else
5466 	    p = NULL;
5467 
5468 	/* Handle the drop, :edit or :split to get to the file.  This also
5469 	 * frees fnames[].  Skip this if there is only one item it's a
5470 	 * directory and Shift is held down. */
5471 	if (count == 1 && (modifiers & MOUSE_SHIFT) != 0
5472 						     && mch_isdir(fnames[0]))
5473 	{
5474 	    vim_free(fnames[0]);
5475 	    vim_free(fnames);
5476 	}
5477 	else
5478 	    handle_drop(count, fnames, (modifiers & MOUSE_CTRL) != 0);
5479 
5480 	/* If Shift held down, change to first file's directory.  If the first
5481 	 * item is a directory, change to that directory (and let the explorer
5482 	 * plugin show the contents). */
5483 	if (p != NULL)
5484 	{
5485 	    if (mch_isdir(p))
5486 	    {
5487 		if (mch_chdir((char *)p) == 0)
5488 		    shorten_fnames(TRUE);
5489 	    }
5490 	    else if (vim_chdirfile(p) == OK)
5491 		shorten_fnames(TRUE);
5492 	    vim_free(p);
5493 	}
5494 
5495 	/* Update the screen display */
5496 	update_screen(NOT_VALID);
5497 # ifdef FEAT_MENU
5498 	gui_update_menus(0);
5499 # endif
5500 #ifdef FEAT_TITLE
5501 	maketitle();
5502 #endif
5503 	setcursor();
5504 	out_flush();
5505 	gui_update_cursor(FALSE, FALSE);
5506 	gui_mch_flush();
5507     }
5508 
5509     entered = FALSE;
5510 }
5511 #endif
5512