Display a tooltip when mousing over a tab title.

This allows a user to see the full page title.

Review URL: http://codereview.chromium.org/118095

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17429 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 26 insertions, 0 deletions

diff --git a/chrome/browser/cocoa/tab_controller.h b/chrome/browser/cocoa/tab_controller.h
index d7783b7..7795ec3 100644
--- a/chrome/browser/cocoa/tab_controller.h
+++ b/chrome/browser/cocoa/tab_controller.h
@@ -62,4 +62,8 @@
 
 @end
 
+@interface TabController(TestingAPI)
+- (NSString *)toolTip;
+@end  // TabController(TestingAPI)
+
 #endif  // CHROME_BROWSER_COCOA_TAB_CONTROLLER_H_
diff --git a/chrome/browser/cocoa/tab_controller.mm b/chrome/browser/cocoa/tab_controller.mm
index c5aae1a..94d1ca2 100644
--- a/chrome/browser/cocoa/tab_controller.mm
+++ b/chrome/browser/cocoa/tab_controller.mm
@@ -56,6 +56,11 @@
   }
 }
 
+- (void)setTitle:(NSString *)title {
+  [backgroundButton_ setToolTip:title];
+  [super setTitle:title];
+}
+
 - (void)setSelected:(BOOL)selected {
   if (selected_ != selected)
     [self internalSetSelected:selected];
@@ -77,4 +82,8 @@
   return iconView_;
 }
 
+- (NSString *)toolTip {
+  return [backgroundButton_ toolTip];
+}
+
 @end
diff --git a/chrome/browser/cocoa/tab_controller_unittest.mm b/chrome/browser/cocoa/tab_controller_unittest.mm
index 7d1228a..c6526be 100644
--- a/chrome/browser/cocoa/tab_controller_unittest.mm
+++ b/chrome/browser/cocoa/tab_controller_unittest.mm
@@ -107,6 +107,19 @@ TEST_F(TabControllerTest, APISelection) {
   [[controller view] removeFromSuperview];
 }
 
+// Tests that setting the title of a tab sets the tooltip as well.
+TEST_F(TabControllerTest, ToolTip) {
+  NSWindow* window = cocoa_helper_.window();
+
+  scoped_nsobject<TabController> controller([[TabController alloc] init]);
+  [[window contentView] addSubview:[controller view]];
+
+  EXPECT_TRUE([[controller toolTip] length] == 0);
+  NSString *tooltip_string = @"Some text to use as a tab title";
+  [controller setTitle:tooltip_string];
+  EXPECT_TRUE([tooltip_string isEqualToString:[controller toolTip]]);
+}
+
 // Tests setting the |loading| property via code.
 TEST_F(TabControllerTest, Loading) {
   NSWindow* window = cocoa_helper_.window();