Trying again: Gtk: Make click target of tabs match their appearance.

BUG=87856
TEST=See bug

Review URL: http://codereview.chromium.org/7740043

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@99911 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 66 insertions, 0 deletions

diff --git a/chrome/browser/ui/tabs/tab_resources.cc b/chrome/browser/ui/tabs/tab_resources.cc
new file mode 100644
index 0000000..45f06c3
--- /dev/null
+++ b/chrome/browser/ui/tabs/tab_resources.cc
@@ -0,0 +1,44 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/tabs/tab_resources.h"
+
+#include "base/logging.h"
+#include "ui/gfx/path.h"
+
+namespace {
+
+// Hit mask constants.
+const SkScalar kTabCapWidth = 15;
+const SkScalar kTabTopCurveWidth = 4;
+const SkScalar kTabBottomCurveWidth = 3;
+
+}  // namespace
+
+// static
+void TabResources::GetHitTestMask(int width, int height, gfx::Path* path) {
+  DCHECK(path);
+
+  SkScalar h = SkIntToScalar(height);
+  SkScalar w = SkIntToScalar(width);
+
+  path->moveTo(0, h);
+
+  // Left end cap.
+  path->lineTo(kTabBottomCurveWidth, h - kTabBottomCurveWidth);
+  path->lineTo(kTabCapWidth - kTabTopCurveWidth, kTabTopCurveWidth);
+  path->lineTo(kTabCapWidth, 0);
+
+  // Connect to the right cap.
+  path->lineTo(w - kTabCapWidth, 0);
+
+  // Right end cap.
+  path->lineTo(w - kTabCapWidth + kTabTopCurveWidth, kTabTopCurveWidth);
+  path->lineTo(w - kTabBottomCurveWidth, h - kTabBottomCurveWidth);
+  path->lineTo(w, h);
+
+  // Close out the path.
+  path->lineTo(0, h);
+  path->close();
+}
diff --git a/chrome/browser/ui/tabs/tab_resources.h b/chrome/browser/ui/tabs/tab_resources.h
new file mode 100644
index 0000000..975ccd0
--- /dev/null
+++ b/chrome/browser/ui/tabs/tab_resources.h
@@ -0,0 +1,22 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_TABS_TAB_RESOURCES_H_
+#define CHROME_BROWSER_UI_TABS_TAB_RESOURCES_H_
+#pragma once
+
+namespace gfx {
+class Path;
+}
+
+// Common resources for tab widgets. Currently this is used on Views and Gtk,
+// but not on Cocoa.
+class TabResources {
+ public:
+  // Return a |path| containing the region that matches the bitmap display of
+  // a tab of the given |width| and |height|, for input event hit testing.
+  static void GetHitTestMask(int width, int height, gfx::Path* path);
+};
+
+#endif  // CHROME_BROWSER_UI_TABS_TAB_RESOURCES_H_