Convert RTF on the pasteboard to HTML and all it to substitute if present and...

third_party/mozilla/NSPasteboard+Utils.mm

 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
  * http://www.mozilla.org/MPL/
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
@@ skipping 261 matching lines @@
   if ([types containsObject:NSStringPboardType]) {
     // Trim whitespace off the ends and newlines out of the middle so we don't reject otherwise-valid URLs;
     // we'll do another cleaning when we set the URLs and titles later, so this is safe.
     NSString* potentialURLString = [self cleanedStringWithPasteboardString:[self stringForType:NSStringPboardType]];
     return [potentialURLString isValidURI];
   }
   
   return NO;
 }
 @end
+
+@implementation NSPasteboard(ChromiumHTMLUtils)
+
+// Convert the RTF to HTML via an NSAttributedString.
+- (NSString*)htmlFromRtf {
+  if (![[self types] containsObject:NSRTFPboardType])
+    return @"";
+
+  NSAttributedString* attributed =
+      [[[NSAttributedString alloc]
+             initWithRTF:[self dataForType:NSRTFPboardType]
+      documentAttributes:nil] autorelease];
+  NSDictionary* attributeDict =
+      [NSDictionary dictionaryWithObject:NSHTMLTextDocumentType
+                                  forKey:NSDocumentTypeDocumentAttribute];
+  NSData* htmlData =
+      [attributed dataFromRange:NSMakeRange(0, [attributed length])
+             documentAttributes:attributeDict
+                          error:nil];
+  // According to the docs, NSHTMLTextDocumentType is UTF8.
+  return [[[NSString alloc] 
+      initWithData:htmlData encoding:NSUTF8StringEncoding] autorelease];
+}
+
+@end