Propagate pageScaleFactor to GuestViews

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 397 matching lines @@
       fullscreen_widget_routing_id_(MSG_ROUTING_NONE),
       fullscreen_widget_had_focus_at_shutdown_(false),
       is_subframe_(false),
       force_disable_overscroll_content_(false),
       last_dialog_suppressed_(false),
       geolocation_service_context_(new GeolocationServiceContext()),
       accessibility_mode_(
           BrowserAccessibilityStateImpl::GetInstance()->accessibility_mode()),
       audio_stream_monitor_(this),
       virtual_keyboard_requested_(false),
+      page_scale_factor_is_one_(true),
       loading_weak_factory_(this) {
   frame_tree_.SetFrameRemoveListener(
       base::Bind(&WebContentsImpl::OnFrameRemoved,
                  base::Unretained(this)));
 #if defined(ENABLE_BROWSER_CDMS)
   media_web_contents_observer_.reset(new MediaWebContentsObserver(this));
 #endif
 
   wake_lock_service_context_.reset(new WakeLockServiceContext(this));
 }
@@ skipping 203 matching lines @@
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidFirstVisuallyNonEmptyPaint,
                         OnFirstVisuallyNonEmptyPaint)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidLoadResourceFromMemoryCache,
                         OnDidLoadResourceFromMemoryCache)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidDisplayInsecureContent,
                         OnDidDisplayInsecureContent)
     IPC_MESSAGE_HANDLER(FrameHostMsg_DidRunInsecureContent,
                         OnDidRunInsecureContent)
     IPC_MESSAGE_HANDLER(ViewHostMsg_GoToEntryAtOffset, OnGoToEntryAtOffset)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateZoomLimits, OnUpdateZoomLimits)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_PageScaleFactorChanged,
+                        OnPageScaleFactorChanged)
     IPC_MESSAGE_HANDLER(ViewHostMsg_EnumerateDirectory, OnEnumerateDirectory)
     IPC_MESSAGE_HANDLER(FrameHostMsg_RegisterProtocolHandler,
                         OnRegisterProtocolHandler)
     IPC_MESSAGE_HANDLER(FrameHostMsg_UnregisterProtocolHandler,
                         OnUnregisterProtocolHandler)
     IPC_MESSAGE_HANDLER(FrameHostMsg_UpdatePageImportanceSignals,
                         OnUpdatePageImportanceSignals)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Find_Reply, OnFindReply)
     IPC_MESSAGE_HANDLER(ViewHostMsg_AppCacheAccessed, OnAppCacheAccessed)
     IPC_MESSAGE_HANDLER(ViewHostMsg_WebUISend, OnWebUISend)
@@ skipping 1994 matching lines @@
 }
 
 int WebContentsImpl::GetMinimumZoomPercent() const {
   return minimum_zoom_percent_;
 }
 
 int WebContentsImpl::GetMaximumZoomPercent() const {
   return maximum_zoom_percent_;
 }
 
-void WebContentsImpl::ResetPageScale() {
-  Send(new ViewMsg_ResetPageScale(GetRoutingID()));
+void WebContentsImpl::SetPageScale(float page_scale_factor) {
+  Send(new ViewMsg_SetPageScale(GetRoutingID(), page_scale_factor));
 }
 
 gfx::Size WebContentsImpl::GetPreferredSize() const {
   return capturer_count_ == 0 ? preferred_size_ : preferred_size_for_capture_;
 }
 
 bool WebContentsImpl::GotResponseToLockMouseRequest(bool allowed) {
   if (GetBrowserPluginGuest())
     return GetBrowserPluginGuest()->LockMouse(allowed);
 
@@ skipping 477 matching lines @@
   if (!delegate_ || delegate_->OnGoToEntryOffset(offset))
     controller_.GoToOffset(offset);
 }
 
 void WebContentsImpl::OnUpdateZoomLimits(int minimum_percent,
                                          int maximum_percent) {
   minimum_zoom_percent_ = minimum_percent;
   maximum_zoom_percent_ = maximum_percent;
 }
 
+void WebContentsImpl::OnPageScaleFactorChanged(float page_scale_factor) {

[wjmaclean, 2015/11/18 16:37:37]

is page_scale_factor always guaranteed to be different each time this function
is called?

[Kevin McNee - google account, 2015/11/18 19:41:34]

We only get notifications when the page scale factor actually changes. See
blink::VisualViewport::setScaleAndLocation.

+  bool is_one = page_scale_factor == 1.f;
+  if (is_one != page_scale_factor_is_one_) {
+    page_scale_factor_is_one_ = is_one;
+
+    HostZoomMapImpl* host_zoom_map =
+        static_cast<HostZoomMapImpl*>(HostZoomMap::GetForWebContents(this));
+
+    if (host_zoom_map && GetRenderProcessHost()) {
+      host_zoom_map->SetPageScaleFactorIsOneForView(
+          GetRenderProcessHost()->GetID(), GetRoutingID(),
+          page_scale_factor_is_one_);
+    }
+  }
+
+  FOR_EACH_OBSERVER(WebContentsObserver,
+                    observers_,
+                    OnPageScaleFactorChanged(page_scale_factor));
+}
+
 void WebContentsImpl::OnEnumerateDirectory(int request_id,
                                            const base::FilePath& path) {
   if (!delegate_)
     return;
 
   ChildProcessSecurityPolicyImpl* policy =
       ChildProcessSecurityPolicyImpl::GetInstance();
   if (policy->CanReadFile(GetRenderProcessHost()->GetID(), path))
     delegate_->EnumerateDirectory(this, request_id, path);
 }
@@ skipping 1515 matching lines @@
   return NULL;
 }
 
 void WebContentsImpl::SetForceDisableOverscrollContent(bool force_disable) {
   force_disable_overscroll_content_ = force_disable;
   if (view_)
     view_->SetOverscrollControllerEnabled(CanOverscrollContent());
 }
 
 }  // namespace content