Implement sidebar support for extension action popups

chrome/browser/extensions/sidebar_manager.cc

+// Copyright 2015 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 "chrome/browser/extensions/sidebar_manager.h"
+
+#include "chrome/browser/extensions/sidebar_container.h"
+#include "chrome/browser/extensions/sidebar_manager_observer.h"
+#include "content/public/browser/web_contents.h"
+#include "extensions/browser/extension_system.h"
+#include "url/gurl.h"
+
+using content::WebContents;
+
+namespace extensions {
+
+// static
+SidebarManager* SidebarManager::GetFromContext(
+    content::BrowserContext* context) {
+  return ExtensionSystem::Get(context)->sidebar_manager();
+}
+
+SidebarManager::SidebarManager() {
+}
+
+SidebarManager::~SidebarManager() {
+  DCHECK(tab_to_sidebar_container_.empty());
+}
+
+SidebarContainer* SidebarManager::GetSidebarContainerFor(
+    content::WebContents* tab) {
+  TabToSidebarContainerMap::iterator it = tab_to_sidebar_container_.find(tab);
+  return it == tab_to_sidebar_container_.end() ? nullptr : it->second;
+}
+
+void SidebarManager::CreateSidebar(content::WebContents* tab,
+                                   const GURL& url,
+                                   Browser* browser) {
+  DCHECK(tab);
+  SidebarContainer* container = GetSidebarContainerFor(tab);
+  if (container)

[Devlin, 2015/07/07 21:39:29]

There's a check in HideSidebar() that does this, so you don't have to do it
here, too.

[ltilve, 2015/07/09 22:15:51]

Done.

+    HideSidebar(tab);
+
+  container = new SidebarContainer(browser, tab, url);
+  tab_to_sidebar_container_[tab] = container;
+
+  const std::string id = container->extension_id();
+  FOR_EACH_OBSERVER(SidebarManagerObserver, observer_list_,
+                    OnSidebarShown(tab, id));
+}
+
+void SidebarManager::HideSidebar(WebContents* tab) {
+  DCHECK(tab);
+  SidebarContainer* container = GetSidebarContainerFor(tab);
+  if (!container)
+    return;
+
+  const std::string content_id = container->extension_id();
+  tab_to_sidebar_container_.erase(tab);
+  delete container;
+
+  FOR_EACH_OBSERVER(SidebarManagerObserver, observer_list_,
+                    OnSidebarHidden(tab, content_id));
+}
+
+void SidebarManager::AddObserver(SidebarManagerObserver* observer) {
+  observer_list_.AddObserver(observer);
+}
+
+void SidebarManager::RemoveObserver(SidebarManagerObserver* observer) {
+  observer_list_.RemoveObserver(observer);
+}
+
+}  // namespace extensions