Make scrollbars and other controls tint/untint upon main window gaining

focus on Mac. This entails the following:
  - getting notifications that the main window has become or lost key
    window status (in BrowserWindowController) [new]
  - ... which tells the RenderWidgetHostView(Mac) to (de)activate [new]
  - ... which tells the RenderWidgetHost to (de)activate [new]
  - ... which sends a ViewMsg_SetActive message [new message] to the
    RenderView [new]
  - ... which tells the WebView(Impl) to (de)activate [new]
  - ... which tells its page()'s FocusController to (de)activate [new]
  - ... which is now in WebKit-land.

N.B.: "Activate" is the nomenclature used in WebKit; "focus"/"blur" can
sometimes (kind of) mean the same thing, but is ambiguous, since "focus"
has a more specific meaning.

Added a WebView unit test, which currently only tests to make sure that
SetActive() (and IsActive() [also new]) work correctly. The changes to
the other classes aren't very testable since they don't actually do
anything (other than pass things along).

BUG=12507
TEST=webkit/glue/webkit_unittest.cc


Patch by viettrungluu@gmail.com (see http://codereview.chromium.org/159048 ),
r=avi


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@21284 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 23 insertions, 0 deletions

diff --git a/chrome/browser/cocoa/browser_window_controller.mm b/chrome/browser/cocoa/browser_window_controller.mm
index f016420..30054d0 100644
--- a/chrome/browser/cocoa/browser_window_controller.mm
+++ b/chrome/browser/cocoa/browser_window_controller.mm
@@ -14,6 +14,7 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/encoding_menu_controller.h"
 #include "chrome/browser/profile.h"
+#include "chrome/browser/renderer_host/render_widget_host_view.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/tab_contents/tab_contents_view.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
@@ -310,6 +311,28 @@ willPositionSheet:(NSWindow*)sheet
   [self applyTheme];
 }
 
+// Called when we are activated (when we gain focus).
+- (void)windowDidBecomeKey:(NSNotification*)notification {
+  // We need to activate the controls (in the "WebView"). To do this, get the
+  // selected TabContents's RenderWidgetHostViewMac and tell it to activate.
+  if (TabContents* contents = browser_->GetSelectedTabContents()) {
+    if (RenderWidgetHostView* rwhv = contents->render_widget_host_view())
+      rwhv->SetActive(true);
+  }
+}
+
+// Called when we are deactivated (when we lose focus).
+- (void)windowDidResignKey:(NSNotification*)notification {
+  // We need to deactivate the controls (in the "WebView"). To do this, get the
+  // selected TabContents's RenderWidgetHostView and tell it to deactivate.
+  if (TabContents* contents = browser_->GetSelectedTabContents()) {
+    if (RenderWidgetHostView* rwhv = contents->render_widget_host_view())
+      rwhv->SetActive(false);
+  }
+}
+
+
+
 // Called when the user clicks the zoom button (or selects it from the Window
 // menu). Zoom to the appropriate size based on the content. Make sure we
 // enforce a minimum width to ensure websites with small intrinsic widths