[canviz] r487 committed - add superscript and subscript text styles

[can...@googlecode.com]

Revision: 487
Author: ryandesign.com
Date: Sun Sep 15 10:54:56 2013 UTC
Log: add superscript and subscript text styles
http://code.google.com/p/canviz/source/detail?r=487

Modified:
/canviz/trunk/src/Entity.js

=======================================
--- /canviz/trunk/src/Entity.js Sat Sep 14 11:05:43 2013 UTC
+++ /canviz/trunk/src/Entity.js Sun Sep 15 10:54:56 2013 UTC
@@ -163,6 +163,16 @@
// case, though this causes complex strings to look worse.
// http://www.graphviz.org/mantisbt/view.php?id=2333
var yError = this.canviz.bugs.textY * 0.2 * fontSize;
+ if (textStyle & TEXT_SUBSCRIPT || textStyle &
TEXT_SUPERSCRIPT) {
+ // The offset is not based on the font size. This looks
bad
+ // at larger or smaller font sizes but it's what Pango
does.
+ // https://bugzilla.gnome.org/show_bug.cgi?id=519146
+ var yOffset = 5000 / 1024; // from pango
+ if (textStyle & TEXT_SUPERSCRIPT) yOffset = -yOffset;
+ if (this.canviz.invertY) yOffset = -yOffset;
+ baseline += yOffset;
+ fontSize /= 1.2; // from pango
+ }
switch (this.canviz.textMode) {
case 'canvas':
ctx.save();