Merge pull request #1837 from deepak1556/render_client_patch

renderer: option to override page visiblity state

atom/browser/native_window.cc

@@ -78,6 +78,7 @@ const char* kWebRuntimeFeatures[] = {
   switches::kOverlayScrollbars,
   switches::kOverlayFullscreenVideo,
   switches::kSharedWorker,
+  switches::kPageVisibility,
 };
 
 std::string RemoveWhitespace(const std::string& str) {

atom/common/options_switches.cc

@@ -95,6 +95,9 @@ const char kOverlayScrollbars[]          = "overlay-scrollbars";
 const char kOverlayFullscreenVideo[]     = "overlay-fullscreen-video";
 const char kSharedWorker[]               = "shared-worker";
 
+// Set page visiblity to always visible.
+const char kPageVisibility[] = "page-visibility";
+
 // Disable HTTP cache.
 const char kDisableHttpCache[] = "disable-http-cache";
 

atom/common/options_switches.h

@@ -52,6 +52,7 @@ extern const char kSubpixelFontScaling[];
 extern const char kOverlayScrollbars[];
 extern const char kOverlayFullscreenVideo[];
 extern const char kSharedWorker[];
+extern const char kPageVisibility[];
 
 extern const char kDisableHttpCache[];
 

atom/renderer/atom_renderer_client.cc

@@ -191,6 +191,21 @@ content::BrowserPluginDelegate* AtomRendererClient::CreateBrowserPluginDelegate(
   }
 }
 
+bool AtomRendererClient::ShouldOverridePageVisibilityState(
+    const content::RenderFrame* render_frame,
+    blink::WebPageVisibilityState* override_state) {
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  bool b;
+
+  if (IsSwitchEnabled(command_line, switches::kPageVisibility, &b)
+      && b) {
+    *override_state = blink::WebPageVisibilityStateVisible;
+    return true;
+  }
+
+  return false;
+}
+
 void AtomRendererClient::EnableWebRuntimeFeatures() {
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   bool b;

atom/renderer/atom_renderer_client.h

@@ -55,6 +55,9 @@ class AtomRendererClient : public content::ContentRendererClient,
       content::RenderFrame* render_frame,
       const std::string& mime_type,
       const GURL& original_url) override;
+  bool ShouldOverridePageVisibilityState(
+      const content::RenderFrame* render_frame,
+      blink::WebPageVisibilityState* override_state) override;
 
   void EnableWebRuntimeFeatures();
 

docs/api/browser-window.md

@@ -97,6 +97,8 @@ You can also create a window without chrome by using
     * `shared-worker` Boolean
     * `direct-write` Boolean - Whether the DirectWrite font rendering system on
        Windows is enabled
+    * `page-visibility` Boolean - Sets the page visibility state
+       to visible, prevents throttling of DOM timers.
 
 Creates a new `BrowserWindow` with native properties set by the `options`.
 Usually you only need to set the `width` and `height`, other properties will