Make the maximize button more easily hittable when there is a huge amount of tabs present

chrome/browser/ui/views/frame/opaque_browser_frame_view.cc

 // Copyright (c) 2012 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/views/frame/opaque_browser_frame_view.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 420 matching lines @@
 }
 
 void OpaqueBrowserFrameView::Layout() {
   LayoutWindowControls();
   LayoutTitleBar();
   LayoutAvatar();
   client_view_bounds_ = CalculateClientAreaBounds(width(), height());
 }
 
 bool OpaqueBrowserFrameView::HitTestRect(const gfx::Rect& rect) const {
-  // If |rect| does not intersect the bounds of the client area, claim it.
-  bool in_nonclient = NonClientFrameView::HitTestRect(rect);
-  if (in_nonclient)
-    return in_nonclient;
+  if (!views::View::HitTestRect(rect)) {
+    // |rect| is outside OpaqueBrowserFrameView's bounds.
+    return false;
+  }
 
-  // Otherwise claim it only if it's in a non-tab portion of the tabstrip.
-  if (!browser_view()->tabstrip())
-    return false;
-  gfx::Rect tabstrip_bounds(browser_view()->tabstrip()->bounds());
-  gfx::Point tabstrip_origin(tabstrip_bounds.origin());
-  View::ConvertPointToTarget(frame()->client_view(), this, &tabstrip_origin);
-  tabstrip_bounds.set_origin(tabstrip_origin);
-  if (rect.bottom() > tabstrip_bounds.bottom())
+  // If the rect is outside the bounds of the client area, claim it.
+  if (!frame()->client_view()->HitTestRect(rect))
+    return true;
+
+  // Otherwise, claim |rect| only if it is above the bottom of the tabstrip in
+  // a non-tab portion.
+  TabStrip* tabstrip = browser_view()->tabstrip();
+  if (!tabstrip || !browser_view()->IsTabStripVisible())
     return false;
 
-  // We convert from our parent's coordinates since we assume we fill its bounds
-  // completely. We need to do this since we're not a parent of the tabstrip,
-  // meaning ConvertPointToTarget would otherwise return something bogus.
-  // TODO(tdanderson): Initialize |browser_view_point| using |rect| instead of
-  // its center point once GetEventHandlerForRect() is implemented.
-  gfx::Point browser_view_point(rect.CenterPoint());
-  View::ConvertPointToTarget(parent(), browser_view(), &browser_view_point);
-  return browser_view()->IsPositionInWindowCaption(browser_view_point);
+  gfx::Point rect_in_tabstrip_coords_origin(rect.origin());
+  View::ConvertPointToTarget(this, tabstrip,
+      &rect_in_tabstrip_coords_origin);
+  gfx::Rect rect_in_tabstrip_coords(
+      rect_in_tabstrip_coords_origin, rect.size());
+
+  if (tabstrip->HitTestRect(rect_in_tabstrip_coords)) {
+    // TODO(tdanderson): Pass |rect_in_tabstrip_coords| instead of its center
+    // point to TabStrip::IsPositionInWindowCaption() once
+    // GetEventHandlerForRect() is implemented.
+    return tabstrip->IsPositionInWindowCaption(
+        rect_in_tabstrip_coords.CenterPoint());
+  }
+
+  // The window switcher button is in the client view.
+  views::View* window_switcher_button =
+      browser_view()->window_switcher_button();

[James Cook, 2013/07/17 21:44:34]

Does anything with the window switcher button need to happen in
GlassBrowserFrameView?

[pkotwicz, 2013/07/18 14:38:29]

GlassBrowserFrameView does not need to worry about the WindowSwitcherButton.
GlassBrowserFrameView::HitTestRect() returns false for any rects intersecting
BrowserView.

OpaqueBrowserFrameView is always used when win8::IsSingleWindowMetroMode()
returns true. (In particular, this is affected by the return value of
BrowserFrameWin::ShouldUseNativeFrame())

+  if (window_switcher_button) {
+    gfx::Point rect_in_window_switcher_coords_origin(rect.origin());
+    View::ConvertPointToTarget(this, window_switcher_button,
+        &rect_in_window_switcher_coords_origin);
+    gfx::Rect rect_in_window_switcher_coords(
+        rect_in_window_switcher_coords_origin, rect.size());
+
+    if (window_switcher_button->HitTestRect(rect_in_window_switcher_coords))
+      return false;
+  }
+
+  // Claim |rect| if is to the left or right of the tab strip. In
+  // particular, the window controls and the avatar label/button are there.
+  return rect_in_tabstrip_coords.bottom() <=

[James Cook, 2013/07/17 21:44:34]

Again, maybe the comment could be clearer?

+      tabstrip->GetLocalBounds().bottom();
 }
 
 void OpaqueBrowserFrameView::GetAccessibleState(
     ui::AccessibleViewState* state) {
   state->role = ui::AccessibilityTypes::ROLE_TITLEBAR;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // OpaqueBrowserFrameView, views::ButtonListener implementation:
 
@@ skipping 578 matching lines @@
 
 gfx::Rect OpaqueBrowserFrameView::CalculateClientAreaBounds(int width,
                                                             int height) const {
   int top_height = NonClientTopBorderHeight(false);
   int border_thickness = NonClientBorderThickness();
   return gfx::Rect(border_thickness, top_height,
                    std::max(0, width - (2 * border_thickness)),
                    std::max(0, height - GetReservedHeight() -
                        top_height - border_thickness));
 }