Refactor AppWindow to enable code re-use with launcher pages.

apps/app_web_contents_helper.cc

+// Copyright 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 "apps/app_web_contents_helper.h"
+
+#include "apps/app_delegate.h"
+#include "base/strings/stringprintf.h"
+#include "chrome/browser/extensions/suggest_permission_util.h"
+#include "content/public/browser/native_web_keyboard_event.h"
+#include "content/public/browser/page_navigator.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+#include "extensions/browser/extension_registry.h"
+#include "extensions/common/extension_messages.h"
+#include "extensions/common/permissions/api_permission.h"
+
+namespace apps {
+
+AppWebContentsHelper::AppWebContentsHelper(
+    content::BrowserContext* browser_context,
+    const std::string& extension_id,
+    content::WebContents* web_contents,
+    AppDelegate* app_delegate)
+    : browser_context_(browser_context),
+      extension_id_(extension_id),
+      web_contents_(web_contents),
+      app_delegate_(app_delegate) {
+}
+
+// static
+bool AppWebContentsHelper::ShouldSuppressGestureEvent(
+    const blink::WebGestureEvent& event) {
+  // Disable pinch zooming in app windows.
+  return event.type == blink::WebGestureEvent::GesturePinchBegin ||
+         event.type == blink::WebGestureEvent::GesturePinchUpdate ||
+         event.type == blink::WebGestureEvent::GesturePinchEnd;
+}
+
+content::WebContents* AppWebContentsHelper::OpenURLFromTab(
+    const content::OpenURLParams& params) const {
+  // Don't allow the current tab to be navigated. It would be nice to map all
+  // anchor tags (even those without target="_blank") to new tabs, but right
+  // now we can't distinguish between those and <meta> refreshes or window.href
+  // navigations, which we don't want to allow.
+  // TOOD(mihaip): Can we check for user gestures instead?
+  WindowOpenDisposition disposition = params.disposition;
+  if (disposition == CURRENT_TAB) {
+    AddMessageToDevToolsConsole(
+        content::CONSOLE_MESSAGE_LEVEL_ERROR,
+        base::StringPrintf(
+            "Can't open same-window link to \"%s\"; try target=\"_blank\".",
+            params.url.spec().c_str()));
+    return NULL;
+  }
+
+  // These dispositions aren't really navigations.
+  if (disposition == SUPPRESS_OPEN || disposition == SAVE_TO_DISK ||
+      disposition == IGNORE_ACTION) {
+    return NULL;
+  }
+
+  content::WebContents* contents =
+      app_delegate_->OpenURLFromTab(browser_context_, web_contents_, params);
+  if (!contents) {
+    AddMessageToDevToolsConsole(
+        content::CONSOLE_MESSAGE_LEVEL_ERROR,
+        base::StringPrintf(
+            "Can't navigate to \"%s\"; apps do not support navigation.",
+            params.url.spec().c_str()));
+  }
+
+  return contents;
+}
+
+void AppWebContentsHelper::RequestToLockMouse() const {
+  const extensions::Extension* extension = GetExtension();
+  if (!extension)
+    return;
+
+  bool has_permission = IsExtensionWithPermissionOrSuggestInConsole(
+      extensions::APIPermission::kPointerLock,
+      extension,
+      web_contents_->GetRenderViewHost());
+
+  web_contents_->GotResponseToLockMouseRequest(has_permission);
+}
+
+void AppWebContentsHelper::RequestMediaAccessPermission(
+    const content::MediaStreamRequest& request,
+    const content::MediaResponseCallback& callback) const {
+  const extensions::Extension* extension = GetExtension();
+  if (!extension)
+    return;
+
+  app_delegate_->RequestMediaAccessPermission(
+      web_contents_, request, callback, extension);
+}
+
+const extensions::Extension* AppWebContentsHelper::GetExtension() const {
+  return extensions::ExtensionRegistry::Get(browser_context_)
+      ->enabled_extensions()
+      .GetByID(extension_id_);
+}
+
+void AppWebContentsHelper::AddMessageToDevToolsConsole(
+    content::ConsoleMessageLevel level,
+    const std::string& message) const {
+  content::RenderViewHost* rvh = web_contents_->GetRenderViewHost();
+  rvh->Send(new ExtensionMsg_AddMessageToConsole(
+      rvh->GetRoutingID(), level, message));
+}
+
+}  // namespace apps