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

chrome/browser/renderer_host/render_widget_host_view_mac.mm

 // Copyright (c) 2006-2008 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/renderer_host/render_widget_host_view_mac.h"
 
 #include "base/histogram.h"
 #import "base/scoped_nsobject.h"
 #include "base/string_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/browser_trial.h"
 #import "chrome/browser/cocoa/rwhvm_editcommand_helper.h"
+#include "chrome/browser/plugin_process_host.h"
 #include "chrome/browser/renderer_host/backing_store.h"
 #include "chrome/browser/renderer_host/render_process_host.h"
 #include "chrome/browser/renderer_host/render_widget_host.h"
 #include "chrome/browser/spellchecker_platform_engine.h"
 #include "chrome/common/native_web_keyboard_event.h"
 #include "chrome/common/edit_command.h"
+#include "chrome/common/plugin_messages.h"
 #include "chrome/common/render_messages.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/WebKit/chromium/public/mac/WebInputEventFactory.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebInputEvent.h"
 #include "webkit/glue/webmenurunner_mac.h"
 
 using WebKit::WebInputEvent;
 using WebKit::WebInputEventFactory;
 using WebKit::WebMouseEvent;
 using WebKit::WebMouseWheelEvent;
@@ skipping 12 matching lines @@
 - (id)initWithRenderWidgetHostViewMac:(RenderWidgetHostViewMac*)r;
 - (void)keyEvent:(NSEvent *)theEvent wasKeyEquivalent:(BOOL)equiv;
 - (void)cancelChildPopups;
 @end
 
 namespace {
 
 // Maximum number of characters we allow in a tooltip.
 const size_t kMaxTooltipLength = 1024;
 
+class NotifyPluginProcessHostTask : public Task {
+ public:
+  NotifyPluginProcessHostTask(uint32 process_id, uint32 instance_id)
+      : process_id_(process_id), instance_id_(instance_id) { }
+
+ private:
+  void Run() {
+    for (ChildProcessHost::Iterator iter(ChildProcessInfo::PLUGIN_PROCESS);
+         !iter.Done(); ++iter) {
+      PluginProcessHost* plugin = static_cast<PluginProcessHost*>(*iter);
+      uint32 plugin_pid = plugin->handle();
+      uint32 instance = (plugin_pid == process_id_) ? instance_id_ : 0;
+      plugin->Send(new PluginProcessMsg_PluginFocusNotify(instance));
+    }
+  }
+
+  uint32 process_id_;
+  uint32 instance_id_;
+};
+
 }
 
 // RenderWidgetHostView --------------------------------------------------------
 
 // static
 RenderWidgetHostView* RenderWidgetHostView::CreateViewForWidget(
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewMac(widget);
 }
 
@@ skipping 66 matching lines @@
 
 void RenderWidgetHostViewMac::WasHidden() {
   if (is_hidden_)
     return;
 
   // If we receive any more paint messages while we are hidden, we want to
   // ignore them so we don't re-allocate the backing store.  We will paint
   // everything again when we become selected again.
   is_hidden_ = true;
 
+  // tell any plugins that thought they had the focus that they do not now.
+  ChromeThread::PostTask(ChromeThread::IO, FROM_HERE,
+                         new NotifyPluginProcessHostTask(0, 0));
+
   // If we have a renderer, then inform it that we are being hidden so it can
   // reduce its resource utilization.
   render_widget_host_->WasHidden();
 }
 
 void RenderWidgetHostViewMac::SetSize(const gfx::Size& size) {
   if (is_hidden_)
     return;
 
   // TODO(avi): the TabContents object uses this method to size the newly
@@ skipping 299 matching lines @@
     return gfx::Rect();
   }
 
   NSRect bounds = [[cocoa_view_ window] frame];
   return NSRectToRect(bounds, [[cocoa_view_ window] screen]);
 }
 
 void RenderWidgetHostViewMac::SetActive(bool active) {
   if (render_widget_host_)
     render_widget_host_->SetActive(active);
+  if (!active)
+    // tell any plugins that thought they had the focus that they do not now.
+    ChromeThread::PostTask(ChromeThread::IO, FROM_HERE,
+                           new NotifyPluginProcessHostTask(0, 0));
 }
 
 void RenderWidgetHostViewMac::SetBackground(const SkBitmap& background) {
   RenderWidgetHostView::SetBackground(background);
   if (render_widget_host_)
     render_widget_host_->Send(new ViewMsg_SetBackground(
         render_widget_host_->routing_id(), background));
 }
 
 // EditCommandMatcher ---------------------------------------------------------
@@ skipping 882 matching lines @@
                                  base::Time::Now().ToDoubleT());
     renderWidgetHostView_->render_widget_host_->ForwardKeyboardEvent(event);
   } else {
     renderWidgetHostView_->render_widget_host_->ImeConfirmComposition(
         UTF8ToUTF16([im_text UTF8String]));
   }
   renderWidgetHostView_->im_composing_ = false;
 }
 
 @end