Fade tab titles

This change fades tab titles instead of truncating them with a "...".

I tried to copy the Mac implemenation from here:
http://code.google.com/p/google-toolbox-for-mac/source/browse/trunk/AppKit/GTMFadeTruncatingTextFieldCell.m
but my version is not as good since I couldn't figure out how to draw text on a transparent background.

BUG=69301
TEST=Ran Chromium and verified that things looked ok.



Review URL: http://codereview.chromium.org/6695043

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@80416 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 19 insertions, 0 deletions

diff --git a/ui/gfx/canvas_skia.h b/ui/gfx/canvas_skia.h
index 9516e8a3..4811a81 100644
--- a/ui/gfx/canvas_skia.h
+++ b/ui/gfx/canvas_skia.h
@@ -37,6 +37,12 @@ class Canvas;
 class CanvasSkia : public skia::PlatformCanvas,
                    public Canvas {
  public:
+  enum TruncateFadeMode {
+    TruncateFadeTail,
+    TruncateFadeHead,
+    TruncateFadeHeadAndTail,
+  };
+
   // Creates an empty Canvas. Callers must use initialize before using the
   // canvas.
   CanvasSkia();
@@ -132,6 +138,19 @@ class CanvasSkia : public skia::PlatformCanvas,
                              const SkColor& color,
                              int x, int y, int w, int h,
                              int flags);
+#if defined(OS_WIN)
+  // Draws the given string with the beginning and/or the end using a fade
+  // gradient. When truncating the head
+  // |desired_characters_to_truncate_from_head| specifies the maximum number of
+  // characters that can be truncated.
+  virtual void DrawFadeTruncatingString(
+      const string16& text,
+      TruncateFadeMode truncate_mode,
+      size_t desired_characters_to_truncate_from_head,
+      const gfx::Font& font,
+      const SkColor& color,
+      const gfx::Rect& display_rect);
+#endif
   virtual void DrawFocusRect(int x, int y, int width, int height);
   virtual void TileImageInt(const SkBitmap& bitmap, int x, int y, int w, int h);
   virtual void TileImageInt(const SkBitmap& bitmap,