Make pinch-zoom work for OOP PDF

extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.cc

 // Copyright 2014 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 "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
 
 #include "base/strings/stringprintf.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/host_zoom_map.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/stream_handle.h"
 #include "content/public/browser/stream_info.h"
 #include "content/public/common/service_registry.h"
 #include "content/public/common/url_constants.h"
 #include "extensions/browser/api/extensions_api_client.h"
 #include "extensions/browser/api/mime_handler_private/mime_handler_private.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_stream_manager.h"
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_constants.h"
 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest_delegate.h"
 #include "extensions/browser/process_manager.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/common/guest_view/guest_view_constants.h"
 #include "extensions/common/guest_view/guest_view_messages.h"
 #include "extensions/strings/grit/extensions_strings.h"
 #include "ipc/ipc_message_macros.h"
 #include "net/base/url_util.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
 
 using content::WebContents;
 
 namespace extensions {
 
 StreamContainer::StreamContainer(scoped_ptr<content::StreamInfo> stream,
                                  int tab_id,
                                  bool embedded,
                                  const GURL& handler_url,
                                  const std::string& extension_id)
@@ skipping 141 matching lines @@
 }
 
 bool MimeHandlerViewGuest::HandleContextMenu(
     const content::ContextMenuParams& params) {
   if (delegate_)
     return delegate_->HandleContextMenu(web_contents(), params);
 
   return false;
 }
 
+bool MimeHandlerViewGuest::PreHandleGestureEvent(
+    content::WebContents* source,
+    const blink::WebGestureEvent& event) {
+  if (event.type == blink::WebGestureEvent::GesturePinchBegin ||
+      event.type == blink::WebGestureEvent::GesturePinchUpdate ||
+      event.type == blink::WebGestureEvent::GesturePinchEnd) {
+    // If we're an embedded plugin we drop pinch-gestures to avoid zooming the
+    // guest.
+    return !is_full_page_plugin();
+  }
+  return false;
+}
+
 void MimeHandlerViewGuest::FindReply(content::WebContents* web_contents,
                                      int request_id,
                                      int number_of_matches,
                                      const gfx::Rect& selection_rect,
                                      int active_match_ordinal,
                                      bool final_update) {
   if (!attached() || !embedder_web_contents()->GetDelegate())
     return;
 
   embedder_web_contents()->GetDelegate()->FindReply(embedder_web_contents(),
@@ skipping 37 matching lines @@
 
 void MimeHandlerViewGuest::OnRequest(
     const ExtensionHostMsg_Request_Params& params) {
   if (extension_function_dispatcher_) {
     extension_function_dispatcher_->Dispatch(
         params, web_contents()->GetRenderViewHost());
   }
 }
 
 }  // namespace extensions