vim/7.3.781

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Subject: Patch 7.3.781
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From: Bram Moolenaar <Bram@moolenaar.net>
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------------

Patch 7.3.781
Problem:    Drawing with 'guifontwide' can be slow.
Solution:   Draw multiple characters at a time. (Taro Muraoka)
Files:	    src/gui.c


*** ../vim-7.3.780/src/gui.c	2012-11-20 12:03:02.000000000 +0100
--- src/gui.c	2013-01-23 17:28:48.000000000 +0100
***************
*** 2380,2386 ****
  	int	cl;		/* byte length of current char */
  	int	comping;	/* current char is composing */
  	int	scol = col;	/* screen column */
! 	int	dowide;		/* use 'guifontwide' */
  
  	/* Break the string at a composing character, it has to be drawn on
  	 * top of the previous character. */
--- 2380,2388 ----
  	int	cl;		/* byte length of current char */
  	int	comping;	/* current char is composing */
  	int	scol = col;	/* screen column */
! 	int	curr_wide;	/* use 'guifontwide' */
! 	int	prev_wide = FALSE;
! 	int	wide_changed;
  
  	/* Break the string at a composing character, it has to be drawn on
  	 * top of the previous character. */
***************
*** 2395,2403 ****
  		    && fontset == NOFONTSET
  #  endif
  		    && gui.wide_font != NOFONT)
! 		dowide = TRUE;
  	    else
! 		dowide = FALSE;
  	    comping = utf_iscomposing(c);
  	    if (!comping)	/* count cells from non-composing chars */
  		cells += cn;
--- 2397,2405 ----
  		    && fontset == NOFONTSET
  #  endif
  		    && gui.wide_font != NOFONT)
! 		curr_wide = TRUE;
  	    else
! 		curr_wide = FALSE;
  	    comping = utf_iscomposing(c);
  	    if (!comping)	/* count cells from non-composing chars */
  		cells += cn;
***************
*** 2405,2413 ****
  	    if (cl == 0)	/* hit end of string */
  		len = i + cl;	/* len must be wrong "cannot happen" */
  
! 	    /* print the string so far if it's the last character or there is
  	     * a composing character. */
! 	    if (i + cl >= len || (comping && i > start) || dowide
  #  if defined(FEAT_GUI_X11)
  		    || (cn > 1
  #   ifdef FEAT_XFONTSET
--- 2407,2417 ----
  	    if (cl == 0)	/* hit end of string */
  		len = i + cl;	/* len must be wrong "cannot happen" */
  
! 	    wide_changed = curr_wide != prev_wide;
! 
! 	    /* Print the string so far if it's the last character or there is
  	     * a composing character. */
! 	    if (i + cl >= len || (comping && i > start) || wide_changed
  #  if defined(FEAT_GUI_X11)
  		    || (cn > 1
  #   ifdef FEAT_XFONTSET
***************
*** 2419,2443 ****
  #  endif
  	       )
  	    {
! 		if (comping || dowide)
  		    thislen = i - start;
  		else
  		    thislen = i - start + cl;
  		if (thislen > 0)
  		{
  		    gui_mch_draw_string(gui.row, scol, s + start, thislen,
  								  draw_flags);
  		    start += thislen;
  		}
  		scol += cells;
  		cells = 0;
! 		if (dowide)
  		{
! 		    gui_mch_set_font(gui.wide_font);
! 		    gui_mch_draw_string(gui.row, scol - cn,
! 						   s + start, cl, draw_flags);
! 		    gui_mch_set_font(font);
! 		    start += cl;
  		}
  
  #  if defined(FEAT_GUI_X11)
--- 2423,2450 ----
  #  endif
  	       )
  	    {
! 		if (comping || wide_changed)
  		    thislen = i - start;
  		else
  		    thislen = i - start + cl;
  		if (thislen > 0)
  		{
+ 		    if (prev_wide)
+ 			gui_mch_set_font(gui.wide_font);
  		    gui_mch_draw_string(gui.row, scol, s + start, thislen,
  								  draw_flags);
+ 		    if (prev_wide)
+ 			gui_mch_set_font(font);
  		    start += thislen;
  		}
  		scol += cells;
  		cells = 0;
! 		/* Adjust to not draw a character which width is changed
! 		 * against with last one. */
! 		if (wide_changed && !comping)
  		{
! 		    scol -= cn;
! 		    cl = 0;
  		}
  
  #  if defined(FEAT_GUI_X11)
***************
*** 2447,2453 ****
  #   ifdef FEAT_XFONTSET
  			&& fontset == NOFONTSET
  #   endif
! 			&& !dowide)
  		    gui_mch_draw_string(gui.row, scol - 1, (char_u *)" ",
  							       1, draw_flags);
  #  endif
--- 2454,2460 ----
  #   ifdef FEAT_XFONTSET
  			&& fontset == NOFONTSET
  #   endif
! 			&& !wide_changed)
  		    gui_mch_draw_string(gui.row, scol - 1, (char_u *)" ",
  							       1, draw_flags);
  #  endif
***************
*** 2465,2470 ****
--- 2472,2478 ----
  #  endif
  		start = i + cl;
  	    }
+ 	    prev_wide = curr_wide;
  	}
  	/* The stuff below assumes "len" is the length in screen columns. */
  	len = scol - col;
*** ../vim-7.3.780/src/version.c	2013-01-23 17:15:25.000000000 +0100
--- src/version.c	2013-01-23 17:28:17.000000000 +0100
***************
*** 727,728 ****
--- 727,730 ----
  {   /* Add new patch number below this line */
+ /**/
+     781,
  /**/

-- 
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ARTHUR:    We found them.
GUARD #1:  Found them?  In Mercea?  The coconut's tropical!
ARTHUR:    What do you mean?
GUARD #1:  Well, this is a temperate zone.
                                  The Quest for the Holy Grail (Monty Python)

 /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\
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