From 683917ae67109a855c4e7fae4dbd418c4415ea91 Mon Sep 17 00:00:00 2001
From: deepak1556 <hop2deep@gmail.com>
Date: Mon, 1 Jun 2015 12:58:20 +0530
Subject: [PATCH] renderer: option to override page visiblity state

---
 atom/browser/native_window.cc         |  1 +
 atom/common/options_switches.cc       |  3 +++
 atom/common/options_switches.h        |  1 +
 atom/renderer/atom_renderer_client.cc | 15 +++++++++++++++
 atom/renderer/atom_renderer_client.h  |  3 +++
 docs/api/browser-window.md            |  2 ++
 6 files changed, 25 insertions(+)

diff --git a/atom/browser/native_window.cc b/atom/browser/native_window.cc
index 3698d8b94594..c2326debc99b 100644
--- a/atom/browser/native_window.cc
+++ b/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) {
diff --git a/atom/common/options_switches.cc b/atom/common/options_switches.cc
index 7f642ecbbabd..c9997996fed8 100644
--- a/atom/common/options_switches.cc
+++ b/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";
 
diff --git a/atom/common/options_switches.h b/atom/common/options_switches.h
index aaaa86addb15..071459afac73 100644
--- a/atom/common/options_switches.h
+++ b/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[];
 
diff --git a/atom/renderer/atom_renderer_client.cc b/atom/renderer/atom_renderer_client.cc
index 1dc4e45b03d7..e2a114af0141 100644
--- a/atom/renderer/atom_renderer_client.cc
+++ b/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;
diff --git a/atom/renderer/atom_renderer_client.h b/atom/renderer/atom_renderer_client.h
index af264d59792d..68201f3cd435 100644
--- a/atom/renderer/atom_renderer_client.h
+++ 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();
 
diff --git a/docs/api/browser-window.md b/docs/api/browser-window.md
index 30055dccb0af..c97bec0ebbb1 100644
--- a/docs/api/browser-window.md
+++ b/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