Mac: Simulate the OS-level focus handling that windows and linux plugins

rely on to trigger NPAPI keyboard focus notifications.
BUG=26585
TEST=On pages with multiple Flash text entry fields, only one should have
a blinking caret at any time.  Flash elements that use the ActionScript2
"Key.IsDown()" function should only detect keydowns when they are in a
visible tab and focused.
Review URL: http://codereview.chromium.org/399090

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@32631 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 19 insertions, 0 deletions

diff --git a/chrome/plugin/webplugin_delegate_stub.cc b/chrome/plugin/webplugin_delegate_stub.cc
index a4dabfb..6807b7b 100644
--- a/chrome/plugin/webplugin_delegate_stub.cc
+++ b/chrome/plugin/webplugin_delegate_stub.cc
@@ -46,6 +46,22 @@ class FinishDestructionTask : public Task {
   WebPlugin* webplugin_;
 };
 
+#if defined(OS_MACOSX)
+namespace {
+
+void FocusNotifier(WebPluginDelegateImpl *instance) {
+  uint32 process_id = getpid();
+  uint32 instance_id = reinterpret_cast<uint32>(instance);
+  PluginThread* plugin_thread = PluginThread::current();
+  if (plugin_thread) {
+    plugin_thread->Send(
+        new PluginProcessHostMsg_PluginReceivedFocus(process_id, instance_id));
+  }
+}
+
+}
+#endif
+
 WebPluginDelegateStub::WebPluginDelegateStub(
     const std::string& mime_type, int instance_id, PluginChannel* channel) :
     mime_type_(mime_type),
@@ -164,6 +180,9 @@ void WebPluginDelegateStub::OnInit(const PluginMsg_Init_Params& params,
                                     params.arg_values,
                                     webplugin_,
                                     params.load_manually);
+#if defined(OS_MACOSX)
+    delegate_->SetFocusNotifier(FocusNotifier);
+#endif
   }
 }