Disable input events when a JS dialog is showing.

chrome/browser/renderer_host/render_widget_host.cc

 // Copyright (c) 2009 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.h"
 
 #include "base/histogram.h"
 #include "base/message_loop.h"
 #include "base/keyboard_codes.h"
 #include "chrome/browser/renderer_host/backing_store.h"
@@ skipping 327 matching lines @@
 
   // We do not bother to stop the hung_renderer_timer_ here in case it will be
   // started again shortly, which happens to be the common use case.
 }
 
 void RenderWidgetHost::SystemThemeChanged() {
   Send(new ViewMsg_ThemeChanged(routing_id_));
 }
 
 void RenderWidgetHost::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
+  if (process_->ignore_input_events())
+    return;
+
   // Avoid spamming the renderer with mouse move events.  It is important
   // to note that WM_MOUSEMOVE events are anyways synthetic, but since our
   // thread is able to rapidly consume WM_MOUSEMOVE events, we may get way
   // more WM_MOUSEMOVE events than we wish to send to the renderer.
   if (mouse_event.type == WebInputEvent::MouseMove) {
     if (mouse_move_pending_) {
       next_mouse_move_.reset(new WebMouseEvent(mouse_event));
       return;
     }
     mouse_move_pending_ = true;
   } else if (mouse_event.type == WebInputEvent::MouseDown) {
     OnUserGesture();
   }
 
   ForwardInputEvent(mouse_event, sizeof(WebMouseEvent));
 }
 
 void RenderWidgetHost::ForwardWheelEvent(
     const WebMouseWheelEvent& wheel_event) {
+  if (process_->ignore_input_events())
+    return;
+
   ForwardInputEvent(wheel_event, sizeof(WebMouseWheelEvent));
 }
 
 void RenderWidgetHost::ForwardKeyboardEvent(
     const NativeWebKeyboardEvent& key_event) {
+  if (process_->ignore_input_events())
+    return;
+
   if (key_event.type == WebKeyboardEvent::Char &&
       (key_event.windowsKeyCode == base::VKEY_RETURN ||
        key_event.windowsKeyCode == base::VKEY_SPACE)) {
     OnUserGesture();
   }
 
   // Double check the type to make sure caller hasn't sent us nonsense that
   // will mess up our key queue.
   if (WebInputEvent::isKeyboardEventType(key_event.type)) {
     // Don't add this key to the queue if we have no way to send the message...
     if (!process_->HasConnection())
       return;
 
     // Put all WebKeyboardEvent objects in a queue since we can't trust the
     // renderer and we need to give something to the UnhandledInputEvent
     // handler.
     key_queue_.push(key_event);
     HISTOGRAM_COUNTS_100("Renderer.KeyboardQueueSize", key_queue_.size());
   }
 
   // Only forward the non-native portions of our event.
   ForwardInputEvent(key_event, sizeof(WebKeyboardEvent));
 }
 
 void RenderWidgetHost::ForwardInputEvent(const WebInputEvent& input_event,
                                          int event_size) {
   if (!process_->HasConnection())
     return;
 
+  DCHECK(!process_->ignore_input_events());
+
   IPC::Message* message = new ViewMsg_HandleInputEvent(routing_id_);
   message->WriteData(
       reinterpret_cast<const char*>(&input_event), event_size);
   input_event_start_time_ = TimeTicks::Now();
   Send(message);
 
   // Any input event cancels a pending mouse move event.
   next_mouse_move_.reset();
 
   StartHangMonitorTimeout(TimeDelta::FromMilliseconds(kHungRendererDelayMs));
@@ skipping 444 matching lines @@
 
   // TODO(darin): do we need to do something else if our backing store is not
   // the same size as the advertised view?  maybe we just assume there is a
   // full paint on its way?
   BackingStore* backing_store = BackingStoreManager::Lookup(this);
   if (!backing_store || (backing_store->size() != view_size))
     return;
   backing_store->ScrollRect(process_->process().handle(), bitmap, bitmap_rect,
                             dx, dy, clip_rect, view_size);
 }