nixpkgs-suyu/pkgs/applications/terminal-emulators/rxvt-unicode/patches/9.06-font-width.patch
AndersonTorres 2bb3a9da24 A directory-category for terminal emulators
This is a mostly cosmetical commit, in the sense it doesn't change the contents
of any package, but reorganizes the overall Nixpkgs expressions.

Terminal emulators are an ubiquitous tool for any Unix user; even the beginners
are routinely familiarized to it. And, manifestly, there are many
implementations of terminal emulators out there, from those traditionally made
in C and C++ to those written in Haskell and Go.

Terminal emulators deserve more highlight. This commit does that by creating a
category for them.
2020-10-28 10:22:39 -03:00

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--- a/src/rxvtfont.C 2008-07-09 12:21:45.000000000 +0400
+++ b/src/rxvtfont.C 2009-10-30 14:32:53.000000000 +0300
@@ -1195,12 +1195,14 @@
XGlyphInfo g;
XftTextExtents16 (disp, f, &ch, 1, &g);
- g.width -= g.x;
-
+/*
+ * bukind: don't use g.width as a width of a character!
+ * instead use g.xOff, see e.g.: http://keithp.com/~keithp/render/Xft.tutorial
+ */
int wcw = WCWIDTH (ch);
- if (wcw > 0) g.width = (g.width + wcw - 1) / wcw;
+ if (wcw > 1) g.xOff = g.xOff / wcw;
+ if (width < g.xOff) width = g.xOff;
- if (width < g.width ) width = g.width;
if (height < g.height ) height = g.height;
if (glheight < g.height - g.y) glheight = g.height - g.y;
}