map webframe zoom api to use HostZoomMap

atom/browser/api/atom_api_web_contents.cc

@@ -819,6 +819,10 @@ bool WebContents::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(AtomViewHostMsg_Message, OnRendererMessage)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(AtomViewHostMsg_Message_Sync,
                                     OnRendererMessageSync)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(AtomViewHostMsg_SetTemporaryZoomLevel,
+                                    OnSetTemporaryZoomLevel)
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(AtomViewHostMsg_GetZoomLevel,
+                                    OnGetZoomLevel)
     IPC_MESSAGE_HANDLER_CODE(ViewHostMsg_SetCursor, OnCursorChange,
       handled = false)
     IPC_MESSAGE_UNHANDLED(handled = false)
@@ -1523,6 +1527,19 @@ double WebContents::GetZoomFactor() {
   return content::ZoomLevelToZoomFactor(level);
 }
 
+void WebContents::OnSetTemporaryZoomLevel(double level,
+                                          IPC::Message* reply_msg) {
+  zoom_controller_->SetTemporaryZoomLevel(level);
+  double new_level = zoom_controller_->GetTemporaryZoomLevel();
+  AtomViewHostMsg_SetTemporaryZoomLevel::WriteReplyParams(reply_msg, new_level);
+  Send(reply_msg);
+}
+
+void WebContents::OnGetZoomLevel(IPC::Message* reply_msg) {
+  AtomViewHostMsg_GetZoomLevel::WriteReplyParams(reply_msg, GetZoomLevel());
+  Send(reply_msg);
+}
+
 v8::Local<v8::Value> WebContents::GetWebPreferences(v8::Isolate* isolate) {
   WebContentsPreferences* web_preferences =
       WebContentsPreferences::FromWebContents(web_contents());

atom/browser/api/atom_api_web_contents.h

@@ -352,6 +352,14 @@ class WebContents : public mate::TrackableObject<WebContents>,
                              const base::ListValue& args,
                              IPC::Message* message);
 
+  // Called when received a synchronous message from renderer to
+  // set temporary zoom level.
+  void OnSetTemporaryZoomLevel(double level, IPC::Message* reply_msg);
+
+  // Called when received a synchronous message from renderer to
+  // get the zoom level.
+  void OnGetZoomLevel(IPC::Message* reply_msg);
+
   v8::Global<v8::Value> session_;
   v8::Global<v8::Value> devtools_web_contents_;
   v8::Global<v8::Value> debugger_;

atom/browser/web_contents_zoom_controller.cc

@@ -22,6 +22,7 @@ WebContentsZoomController::WebContentsZoomController(
     content::WebContents* web_contents)
     : content::WebContentsObserver(web_contents) {
   default_zoom_factor_ = content::kEpsilon;
+  temporary_zoom_level_ = content::kEpsilon;
   host_zoom_map_ = content::HostZoomMap::GetForWebContents(web_contents);
   zoom_subscription_ = host_zoom_map_->AddZoomLevelChangedCallback(base::Bind(
       &WebContentsZoomController::OnZoomLevelChanged, base::Unretained(this)));
@@ -43,6 +44,11 @@ void WebContentsZoomController::SetZoomLevel(double level) {
   if (!web_contents()->GetRenderViewHost()->IsRenderViewLive() ||
       content::ZoomValuesEqual(GetZoomLevel(), level))
     return;
+
+  if (!content::ZoomValuesEqual(GetTemporaryZoomLevel(), content::kEpsilon)) {
+    temporary_zoom_level_ = content::kEpsilon;
+  }
+
   auto new_zoom_factor = content::ZoomLevelToZoomFactor(level);
   content::NavigationEntry* entry =
       web_contents()->GetController().GetLastCommittedEntry();
@@ -54,7 +60,7 @@ void WebContentsZoomController::SetZoomLevel(double level) {
     content::HostZoomMap::SetZoomLevel(web_contents(), level);
     // Notify observers of zoom level changes.
     FOR_EACH_OBSERVER(WebContentsZoomController::Observer, observers_,
-                      OnZoomLevelChanged(web_contents(), level));
+                      OnZoomLevelChanged(web_contents(), level, false));
   }
 }
 
@@ -70,6 +76,34 @@ double WebContentsZoomController::GetDefaultZoomFactor() {
   return default_zoom_factor_;
 }
 
+bool WebContentsZoomController::UsesTemporaryZoomLevel() {
+  return !content::ZoomValuesEqual(temporary_zoom_level_, content::kEpsilon);
+}
+
+double WebContentsZoomController::GetTemporaryZoomLevel() {
+  return temporary_zoom_level_;
+}
+
+void WebContentsZoomController::SetTemporaryZoomLevel(double level) {
+  int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
+  int render_view_id = web_contents()->GetRenderViewHost()->GetRoutingID();
+  host_zoom_map_->SetTemporaryZoomLevel(render_process_id, render_view_id,
+                                        level);
+  temporary_zoom_level_ = level;
+  // Notify observers of zoom level changes.
+  FOR_EACH_OBSERVER(WebContentsZoomController::Observer, observers_,
+                    OnZoomLevelChanged(web_contents(), level, true));
+}
+
+void WebContentsZoomController::DidStartNavigation(
+    content::NavigationHandle* navigation_handle) {
+  if (!navigation_handle->IsInMainFrame() || navigation_handle->IsSamePage())
+    return;
+  int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
+  int render_view_id = web_contents()->GetRenderViewHost()->GetRoutingID();
+  host_zoom_map_->ClearTemporaryZoomLevel(render_process_id, render_view_id);
+}
+
 void WebContentsZoomController::DidFinishNavigation(
     content::NavigationHandle* navigation_handle) {
   if (!navigation_handle->IsInMainFrame() || !navigation_handle->HasCommitted())
@@ -108,6 +142,14 @@ void WebContentsZoomController::SetZoomFactorOnNavigationIfNeeded(
   if (content::ZoomValuesEqual(GetDefaultZoomFactor(), content::kEpsilon))
     return;
 
+  if (!content::ZoomValuesEqual(GetTemporaryZoomLevel(), content::kEpsilon)) {
+    FOR_EACH_OBSERVER(
+        WebContentsZoomController::Observer, observers_,
+        OnZoomLevelChanged(web_contents(), GetTemporaryZoomLevel(), true));
+    temporary_zoom_level_ = content::kEpsilon;
+    return;
+  }
+
   // When kZoomFactor is available, it takes precedence over
   // pref store values but if the host has zoom factor set explicitly
   // then it takes precendence.

atom/browser/web_contents_zoom_controller.h

@@ -5,6 +5,9 @@
 #ifndef ATOM_BROWSER_WEB_CONTENTS_ZOOM_CONTROLLER_H_
 #define ATOM_BROWSER_WEB_CONTENTS_ZOOM_CONTROLLER_H_
 
+#include <map>
+#include <string>
+
 #include "content/public/browser/host_zoom_map.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
@@ -19,7 +22,8 @@ class WebContentsZoomController
   class Observer {
    public:
     virtual void OnZoomLevelChanged(content::WebContents* web_contents,
-                                    double level) {}
+                                    double level,
+                                    bool is_temporary) {}
 
    protected:
     virtual ~Observer() {}
@@ -36,9 +40,13 @@ class WebContentsZoomController
   double GetZoomLevel();
   void SetDefaultZoomFactor(double factor);
   double GetDefaultZoomFactor();
+  void SetTemporaryZoomLevel(double level);
+  bool UsesTemporaryZoomLevel();
+  double GetTemporaryZoomLevel();
 
  protected:
   // content::WebContentsObserver:
+  void DidStartNavigation(content::NavigationHandle* handle) override;
   void DidFinishNavigation(content::NavigationHandle* handle) override;
   void WebContentsDestroyed() override;
   void RenderFrameHostChanged(content::RenderFrameHost* old_host,
@@ -55,6 +63,7 @@ class WebContentsZoomController
 
   // kZoomFactor.
   double default_zoom_factor_;
+  double temporary_zoom_level_;
 
   // Map between zoom factor and hosts in this webContent.
   std::map<std::string, double> host_zoom_factor_;

atom/browser/web_view_guest_delegate.cc

@@ -112,6 +112,10 @@ void WebViewGuestDelegate::DidAttach(int guest_proxy_routing_id) {
   embedder_zoom_controller_ =
       WebContentsZoomController::FromWebContents(embedder_web_contents_);
   embedder_zoom_controller_->AddObserver(this);
+  if (embedder_zoom_controller_->UsesTemporaryZoomLevel()) {
+    double level = embedder_zoom_controller_->GetTemporaryZoomLevel();
+    api_web_contents_->GetZoomController()->SetTemporaryZoomLevel(level);
+  }
 }
 
 content::WebContents* WebViewGuestDelegate::GetOwnerWebContents() const {
@@ -141,10 +145,15 @@ void WebViewGuestDelegate::WillAttach(
 
 void WebViewGuestDelegate::OnZoomLevelChanged(
     content::WebContents* web_contents,
-    double level) {
+    double level,
+    bool is_temporary) {
   if (web_contents == GetOwnerWebContents()) {
+    if (is_temporary) {
+      api_web_contents_->GetZoomController()->SetTemporaryZoomLevel(level);
+    } else {
       api_web_contents_->GetZoomController()->SetZoomLevel(level);
     }
+  }
 }
 
 void WebViewGuestDelegate::GuestSizeChangedDueToAutoSize(

atom/browser/web_view_guest_delegate.h

@@ -67,7 +67,8 @@ class WebViewGuestDelegate : public content::BrowserPluginGuestDelegate,
 
   // WebContentsZoomController::Observer:
   void OnZoomLevelChanged(content::WebContents* web_contents,
-                          double level) override;
+                          double level,
+                          bool is_temporary) override;
 
  private:
   // This method is invoked when the contents auto-resized to give the container

atom/common/api/api_messages.h

@@ -41,3 +41,11 @@ IPC_MESSAGE_ROUTED1(AtomViewHostMsg_UpdateDraggableRegions,
 
 // Update renderer process preferences.
 IPC_MESSAGE_CONTROL1(AtomMsg_UpdatePreferences, base::ListValue)
+
+// Sent by renderer to set the temporary zoom level.
+IPC_SYNC_MESSAGE_ROUTED1_1(AtomViewHostMsg_SetTemporaryZoomLevel,
+                           double /* zoom level */,
+                           double /* result */)
+
+// Sent by renderer to get the zoom level.
+IPC_SYNC_MESSAGE_ROUTED0_1(AtomViewHostMsg_GetZoomLevel, double /* result */)

atom/renderer/api/atom_api_web_frame.cc

@@ -4,6 +4,7 @@
 
 #include "atom/renderer/api/atom_api_web_frame.h"
 
+#include "atom/common/api/api_messages.h"
 #include "atom/common/api/event_emitter_caller.h"
 #include "atom/common/native_mate_converters/blink_converter.h"
 #include "atom/common/native_mate_converters/callback.h"
@@ -72,13 +73,21 @@ void WebFrame::SetName(const std::string& name) {
 }
 
 double WebFrame::SetZoomLevel(double level) {
-  double ret = web_frame_->view()->setZoomLevel(level);
-  mate::EmitEvent(isolate(), GetWrapper(), "zoom-level-changed", ret);
-  return ret;
+  double result;
+  content::RenderView* render_view =
+      content::RenderView::FromWebView(web_frame_->view());
+  render_view->Send(new AtomViewHostMsg_SetTemporaryZoomLevel(
+      render_view->GetRoutingID(), level, &result));
+  return result;
 }
 
 double WebFrame::GetZoomLevel() const {
-  return web_frame_->view()->zoomLevel();
+  double result;
+  content::RenderView* render_view =
+      content::RenderView::FromWebView(web_frame_->view());
+  render_view->Send(
+      new AtomViewHostMsg_GetZoomLevel(render_view->GetRoutingID(), &result));
+  return result;
 }
 
 double WebFrame::SetZoomFactor(double factor) {

lib/renderer/web-view/web-view.js

@@ -34,12 +34,6 @@ class WebViewImpl {
     this.viewInstanceId = getNextId()
     shadowRoot.appendChild(this.browserPluginNode)
 
-    // Subscribe to host's zoom level changes.
-    this.onZoomLevelChanged = (zoomLevel) => {
-      this.webviewNode.setZoomLevel(zoomLevel)
-    }
-    webFrame.on('zoom-level-changed', this.onZoomLevelChanged)
-
     this.onVisibilityChanged = (event, visibilityState) => {
       this.webviewNode.send('ELECTRON_RENDERER_WINDOW_VISIBILITY_CHANGE', visibilityState)
     }
@@ -56,8 +50,6 @@ class WebViewImpl {
 
   // Resets some state upon reattaching <webview> element to the DOM.
   reset () {
-    // Unlisten the zoom-level-changed event.
-    webFrame.removeListener('zoom-level-changed', this.onZoomLevelChanged)
     ipcRenderer.removeListener('ELECTRON_RENDERER_WINDOW_VISIBILITY_CHANGE', this.onVisibilityChanged)
 
     // If guestInstanceId is defined then the <webview> has navigated and has
@@ -230,7 +222,7 @@ class WebViewImpl {
   buildParams () {
     const params = {
       instanceId: this.viewInstanceId,
-      userAgentOverride: this.userAgentOverride,
+      userAgentOverride: this.userAgentOverride
     }
     for (const attributeName in this.attributes) {
       if (hasProp.call(this.attributes, attributeName)) {