From 8c8db3cd4cb094535ecb0254a7fb2e15be31d4fd Mon Sep 17 00:00:00 2001
From: Jjgod Jiang <gzjjgod@gmail.com>
Date: Wed, 16 Jul 2008 16:27:59 +0800
Subject: [PATCH] Turn off ligatures by default

Turn off all common ligatures (fi, ffi) and rare ligatures (ct, ss).
---
 src/MacVim/MMAtsuiTextView.m | 13 +++++++++++++
 src/MacVim/MMTextStorage.m   |  1 +
 2 files changed, 14 insertions(+)

diff --git a/src/MacVim/MMAtsuiTextView.m b/src/MacVim/MMAtsuiTextView.m
index 2b2a697672..db5520976e 100644
--- a/src/MacVim/MMAtsuiTextView.m
+++ b/src/MacVim/MMAtsuiTextView.m
@@ -851,6 +851,14 @@ enum {
         &fontID, &fontSize, &fontWidth, &transform, &options, &font
     };
 
+    ATSUFontFeatureType featureTypes[] = {
+        kLigaturesType, kLigaturesType
+    };
+
+    ATSUFontFeatureSelector featureSelectors[] = {
+        kCommonLigaturesOffSelector, kRareLigaturesOffSelector
+    };
+
     for (i = 0; i < MMMaxCellsPerChar; i++)
     {
         fontWidth = Long2Fix(cellSize.width * (i + 1));
@@ -862,6 +870,11 @@ enum {
             ATSUDisposeStyle(atsuStyles[i]);
             atsuStyles[i] = NULL;
         }
+
+        // Turn off ligatures by default
+        ATSUSetFontFeatures(atsuStyles[i],
+                            sizeof(featureTypes) / sizeof(featureTypes[0]),
+                            featureTypes, featureSelectors);
     }
 }
 
diff --git a/src/MacVim/MMTextStorage.m b/src/MacVim/MMTextStorage.m
index b0b61d5f1f..9a6e9b29e5 100644
--- a/src/MacVim/MMTextStorage.m
+++ b/src/MacVim/MMTextStorage.m
@@ -302,6 +302,7 @@ static NSString *MMWideCharacterAttributeName = @"MMWideChar";
             bg, NSBackgroundColorAttributeName,
             fg, NSForegroundColorAttributeName,
             sp, NSUnderlineColorAttributeName,
+            [NSNumber numberWithInt:0], NSLigatureAttributeName,
             nil];
 
     if (flags & DRAW_UNDERL) {