From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 8 Aug 2010 12:40:37 +0000 (+0200)
Subject: Improve positioning of combining characters in GTK.
X-Git-Tag: v7.3~55
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=96118f3e3817f2ce4df21079ed32ee2961983c12;p=vim

Improve positioning of combining characters in GTK.
---

diff --git a/src/gui_gtk_x11.c b/src/gui_gtk_x11.c
index 04b0ecb9d..2a4b52064 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -5109,13 +5109,20 @@ not_ascii:
 
 		    /* There is a previous glyph, so we deal with combining
 		     * characters the canonical way.
-		     * Older versions of Pango used a positive x_offset,
-		     * then set the width of the previous glyph to zero.
-		     * Newer versions of Pango use a negative x_offset.
+		     * In some circumstances Pango uses a positive x_offset,
+		     * then use the width of the previous glyph for this one
+		     * and set the previous width to zero.
+		     * Otherwise we get a negative x_offset, Pango has already
+		     * positioned the combining char, keep the widths as they
+		     * are.
 		     * For both adjust the x_offset to position the glyph in
-		     * the middle.  */
+		     * the middle. */
 		    if (glyph->geometry.x_offset >= 0)
+		    {
+			glyphs->glyphs[i].geometry.width =
+					 glyphs->glyphs[i - 1].geometry.width;
 			glyphs->glyphs[i - 1].geometry.width = 0;
+		    }
 		    width = cells * gui.char_width * PANGO_SCALE;
 		    glyph->geometry.x_offset +=
 					    MAX(0, width - cluster_width) / 2;