Initial implementation of API WakeLock.

content/browser/wake_lock/wake_lock_manager.cc

+// Copyright (c) 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 "content/browser/wake_lock/wake_lock_manager.h"
+
+#include "content/browser/wake_lock/lock.h"
+#include "content/browser/wake_lock/wake_lock_web_contents_observer.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+
+namespace content {
+
+// static
+WakeLockManager* WakeLockManager::GetInstance() {
+  return Singleton<WakeLockManager>::get();
+}
+
+WakeLockManager::WakeLockManager() {
+}
+
+WakeLockManager::~WakeLockManager() {
+  for (std::set<Lock*>::iterator it = locks_.begin();
+      it != locks_.end();
+      ++it)
+    (*it)->UnlockResource();
+}
+
+void WakeLockManager::createScreenLock(
+    int render_process_id, int routed_id) {
+  if (!getLock(render_process_id, routed_id)) {
+    Lock* lock = new Lock(render_process_id, routed_id);
+    locks_.insert(lock);
+  }
+}
+
+bool WakeLockManager::releaseScreenLock(
+    int render_process_id, int routed_id) {
+  if (Lock* lock = getLock(render_process_id, routed_id)) {
+    locks_.erase(lock);
+    delete lock;
+    return true;
+  }
+  return false;
+}
+
+Lock* WakeLockManager::getLock(
+    int render_process_id, int routed_id) {
+  for (std::set<Lock*>::iterator it = locks_.begin();
+      it != locks_.end();
+      ++it) {
+    Lock* lock = *it;
+    if (lock->GetRenderProcessId() == render_process_id &&
+        lock->GetRoutedId() == routed_id)
+      return lock;
+  }
+  return NULL;
+}
+
+void WakeLockManager::tabWasShown(int render_process_id, int routed_id) {
+  tabChangeVisibility(render_process_id, routed_id, true);
+}
+
+void WakeLockManager::tabWasHidden(int render_process_id, int routed_id) {
+  tabChangeVisibility(render_process_id, routed_id, false);
+}
+
+void WakeLockManager::tabChangeVisibility(
+    int render_process_id, int routed_id, bool visible) {
+  if (Lock* lock = getLock(render_process_id, routed_id)) {
+    if (visible)
+      lock->ForceLockResource();
+    else
+      lock->ForceUnlockResource();
+  }
+}
+
+void WakeLockManager::createWebContentsObserver(
+    int render_process_id, int routed_id) {
+  RenderViewHost* view = RenderViewHost::FromID(
+      render_process_id, routed_id);
+  WebContents* web_contents = WebContents::FromRenderViewHost(view);
+  // TODO(redchenko): check, save and delete it
+  new WakeLockWebContentsObserver(web_contents);
+}
+}