arc: Support running Arc app in shelf

chrome/browser/ui/ash/launcher/extension_app_window_launcher_item_controller.cc

+// Copyright 2016 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/ui/ash/launcher/extension_app_window_launcher_item_controller.h"
+
+#include "ash/wm/window_state.h"
+#include "ash/wm/window_util.h"
+#include "chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item.h"
+#include "chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_v2app.h"
+#include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
+#include "chrome/browser/ui/ash/launcher/launcher_application_menu_item_model.h"
+#include "chrome/browser/ui/ash/launcher/launcher_context_menu.h"
+#include "chrome/browser/ui/ash/launcher/launcher_item_controller.h"
+#include "components/favicon/content/content_favicon_driver.h"
+#include "content/public/browser/web_contents.h"
+#include "extensions/browser/app_window/app_window.h"
+#include "extensions/browser/app_window/native_app_window.h"
+#include "skia/ext/image_operations.h"
+#include "ui/aura/client/aura_constants.h"
+#include "ui/aura/window.h"
+#include "ui/events/event.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/wm/core/window_animations.h"
+
+namespace {
+
+// Size of the icon in the shelf launcher in display-independent pixels.
+const int kAppListIconSize = 24;
+
+// This will return a slightly smaller icon than the app icon to be used in
+// the application list menu.
+gfx::Image GetAppListIcon(extensions::AppWindow* app_window) {
+  // TODO(skuhne): We instead might want to use LoadImages in
+  // AppWindow::UpdateExtensionAppIcon() to let the extension give us
+  // pre-defined icons in the launcher and the launcher list sizes. Since there
+  // is no mock yet, doing this now seems a bit premature and we scale for the
+  // time being.
+  if (app_window->app_icon().IsEmpty())
+    return gfx::Image();
+
+  SkBitmap bmp = skia::ImageOperations::Resize(
+      *app_window->app_icon().ToSkBitmap(), skia::ImageOperations::RESIZE_BEST,
+      kAppListIconSize, kAppListIconSize);
+  return gfx::Image(gfx::ImageSkia::CreateFrom1xBitmap(bmp));
+}
+
+}  // namespace
+
+ExtensionAppWindowLauncherItemController::
+    ExtensionAppWindowLauncherItemController(
+        Type type,
+        const std::string& app_shelf_id,
+        const std::string& app_id,
+        ChromeLauncherController* controller)
+    : AppWindowLauncherItemController(type, app_shelf_id, app_id, controller) {}
+
+ExtensionAppWindowLauncherItemController::
+    ~ExtensionAppWindowLauncherItemController() {}
+
+void ExtensionAppWindowLauncherItemController::AddAppWindow(
+    extensions::AppWindow* app_window) {
+  if (app_window->window_type_is_panel() && type() != TYPE_APP_PANEL)
+    LOG(ERROR) << "AppWindow of type Panel added to non-panel launcher item";
+  DCHECK(window_to_app_window_.find(app_window->GetBaseWindow()) ==
+         window_to_app_window_.end());
+  AddWindow(app_window->GetBaseWindow());
+  window_to_app_window_[app_window->GetBaseWindow()] = app_window;
+}
+
+void ExtensionAppWindowLauncherItemController::OnWindowRemoved(
+    ui::BaseWindow* window) {
+  WindowToAppWindow::iterator it = window_to_app_window_.find(window);
+  if (it == window_to_app_window_.end()) {
+    NOTREACHED();
+    return;
+  }
+
+  window_to_app_window_.erase(it);
+}
+
+ChromeLauncherAppMenuItems
+ExtensionAppWindowLauncherItemController::GetApplicationList(int event_flags) {
+  ChromeLauncherAppMenuItems items =
+      AppWindowLauncherItemController::GetApplicationList(event_flags);
+  int index = 0;
+  for (const auto* window : windows()) {
+    extensions::AppWindow* app_window = window_to_app_window_[window];
+    DCHECK(app_window);
+
+    // If the app's web contents provides a favicon, use it. Otherwise, use a
+    // scaled down app icon.
+    favicon::FaviconDriver* favicon_driver =
+        favicon::ContentFaviconDriver::FromWebContents(
+            app_window->web_contents());
+    gfx::Image result = favicon_driver->GetFavicon();
+    if (result.IsEmpty())
+      result = GetAppListIcon(app_window);
+
+    items.push_back(new ChromeLauncherAppMenuItemV2App(
+        app_window->GetTitle(),
+        &result,  // Will be copied
+        app_id(), launcher_controller(), index,
+        index == 0 /* has_leading_separator */));
+    ++index;
+  }
+  return items;
+}
+
+ash::ShelfItemDelegate::PerformedAction
+ExtensionAppWindowLauncherItemController::ItemSelected(const ui::Event& event) {
+  if (windows().empty())
+    return kNoAction;
+
+  if (type() == TYPE_APP_PANEL) {
+    DCHECK_EQ(windows().size(), 1u);
+    ui::BaseWindow* panel = windows().front();
+    aura::Window* panel_window = panel->GetNativeWindow();
+    // If the panel is attached on another display, move it to the current
+    // display and activate it.
+    if (ash::wm::GetWindowState(panel_window)->panel_attached() &&
+        ash::wm::MoveWindowToEventRoot(panel_window, event)) {
+      if (!panel->IsActive())
+        return ShowAndActivateOrMinimize(panel);
+    } else {
+      return ShowAndActivateOrMinimize(panel);
+    }
+  } else {
+    return AppWindowLauncherItemController::ItemSelected(event);
+  }
+  return kNoAction;
+}
+
+base::string16 ExtensionAppWindowLauncherItemController::GetTitle() {
+  // For panels return the title of the contents if set.
+  // Otherwise return the title of the app.
+  if (type() == TYPE_APP_PANEL && !windows().empty()) {
+    extensions::AppWindow* app_window =
+        window_to_app_window_[windows().front()];
+    DCHECK(app_window);
+    if (app_window->web_contents()) {
+      base::string16 title = app_window->web_contents()->GetTitle();
+      if (!title.empty())
+        return title;
+    }
+  }
+  return AppWindowLauncherItemController::GetTitle();
+}
+
+ash::ShelfMenuModel*
+ExtensionAppWindowLauncherItemController::CreateApplicationMenu(
+    int event_flags) {
+  return new LauncherApplicationMenuItemModel(GetApplicationList(event_flags));
+}
+
+bool ExtensionAppWindowLauncherItemController::IsDraggable() {
+  if (type() == TYPE_APP_PANEL)
+    return true;
+  return AppWindowLauncherItemController::IsDraggable();
+}
+
+bool ExtensionAppWindowLauncherItemController::ShouldShowTooltip() {
+  if (type() == TYPE_APP_PANEL && IsVisible())
+    return false;
+  return AppWindowLauncherItemController::ShouldShowTooltip();
+}