apps/app_window.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef APPS_APP_WINDOW_H_
   6 #define APPS_APP_WINDOW_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "components/sessions/session_id.h"
  14 #include "components/web_modal/popup_manager.h"
  15 #include "components/web_modal/web_contents_modal_dialog_manager_delegate.h"
  16 #include "content/public/browser/notification_observer.h"
  17 #include "content/public/browser/notification_registrar.h"
  18 #include "content/public/browser/web_contents_delegate.h"
  19 #include "content/public/browser/web_contents_observer.h"
  20 #include "extensions/browser/extension_icon_image.h"
  21 #include "ui/base/ui_base_types.h"  // WindowShowState
  22 #include "ui/gfx/image/image.h"
  23 #include "ui/gfx/rect.h"
  24
  25 class GURL;
  26 class SkRegion;
  27
  28 namespace base {
  29 class DictionaryValue;
  30 }
  31
  32 namespace content {
  33 class BrowserContext;
  34 class WebContents;
  35 }
  36
  37 namespace extensions {
  38 class AppDelegate;
  39 class AppWebContentsHelper;
  40 class Extension;
  41 class NativeAppWindow;
  42 class PlatformAppBrowserTest;
  43 class WindowController;
  44
  45 struct DraggableRegion;
  46 }
  47
  48 namespace ui {
  49 class BaseWindow;
  50 }
  51
  52 namespace apps {
  53
  54 // Manages the web contents for app windows. The implementation for this
  55 // class should create and maintain the WebContents for the window, and handle
  56 // any message passing between the web contents and the extension system or
  57 // native window.
  58 class AppWindowContents {
  59  public:
  60   AppWindowContents() {}
  61   virtual ~AppWindowContents() {}
  62
  63   // Called to initialize the WebContents, before the app window is created.
  64   virtual void Initialize(content::BrowserContext* context,
  65                           const GURL& url) = 0;
  66
  67   // Called to load the contents, after the app window is created.
  68   virtual void LoadContents(int32 creator_process_id) = 0;
  69
  70   // Called when the native window changes.
  71   virtual void NativeWindowChanged(
  72       extensions::NativeAppWindow* native_app_window) = 0;
  73
  74   // Called when the native window closes.
  75   virtual void NativeWindowClosed() = 0;
  76
  77   // Called in tests when the window is shown
  78   virtual void DispatchWindowShownForTests() const = 0;
  79
  80   virtual content::WebContents* GetWebContents() const = 0;
  81
  82  private:
  83   DISALLOW_COPY_AND_ASSIGN(AppWindowContents);
  84 };
  85
  86 // AppWindow is the type of window used by platform apps. App windows
  87 // have a WebContents but none of the chrome of normal browser windows.
  88 class AppWindow : public content::NotificationObserver,
  89                   public content::WebContentsDelegate,
  90                   public content::WebContentsObserver,
  91                   public web_modal::WebContentsModalDialogManagerDelegate,
  92                   public extensions::IconImage::Observer {
  93  public:
  94   enum WindowType {
  95     WINDOW_TYPE_DEFAULT = 1 << 0,   // Default app window.
  96     WINDOW_TYPE_PANEL = 1 << 1,     // OS controlled panel window (Ash only).
  97     WINDOW_TYPE_V1_PANEL = 1 << 2,  // For apps v1 support in Ash; deprecate
  98                                     // with v1 apps.
  99   };
 100
 101   enum Frame {
 102     FRAME_CHROME,  // Chrome-style window frame.
 103     FRAME_NONE,    // Frameless window.
 104   };
 105
 106   enum FullscreenType {
 107     // Not fullscreen.
 108     FULLSCREEN_TYPE_NONE = 0,
 109
 110     // Fullscreen entered by the app.window api.
 111     FULLSCREEN_TYPE_WINDOW_API = 1 << 0,
 112
 113     // Fullscreen entered by HTML requestFullscreen().
 114     FULLSCREEN_TYPE_HTML_API = 1 << 1,
 115
 116     // Fullscreen entered by the OS. ChromeOS uses this type of fullscreen to
 117     // enter immersive fullscreen when the user hits the <F4> key.
 118     FULLSCREEN_TYPE_OS = 1 << 2,
 119
 120     // Fullscreen mode that could not be exited by the user. ChromeOS uses
 121     // this type of fullscreen to run an app in kiosk mode.
 122     FULLSCREEN_TYPE_FORCED = 1 << 3,
 123   };
 124
 125   struct BoundsSpecification {
 126     // INT_MIN represents an unspecified position component.
 127     static const int kUnspecifiedPosition;
 128
 129     BoundsSpecification();
 130     ~BoundsSpecification();
 131
 132     // INT_MIN designates 'unspecified' for the position components, and 0
 133     // designates 'unspecified' for the size components. When unspecified,
 134     // they should be replaced with a default value.
 135     gfx::Rect bounds;
 136
 137     gfx::Size minimum_size;
 138     gfx::Size maximum_size;
 139
 140     // Reset the bounds fields to their 'unspecified' values. The minimum and
 141     // maximum size constraints remain unchanged.
 142     void ResetBounds();
 143   };
 144
 145   struct CreateParams {
 146     CreateParams();
 147     ~CreateParams();
 148
 149     WindowType window_type;
 150     Frame frame;
 151
 152     bool has_frame_color;
 153     SkColor active_frame_color;
 154     SkColor inactive_frame_color;
 155     bool alpha_enabled;
 156
 157     // The initial content/inner bounds specification (excluding any window
 158     // decorations).
 159     BoundsSpecification content_spec;
 160
 161     // The initial window/outer bounds specification (including window
 162     // decorations).
 163     BoundsSpecification window_spec;
 164
 165     std::string window_key;
 166
 167     // The process ID of the process that requested the create.
 168     int32 creator_process_id;
 169
 170     // Initial state of the window.
 171     ui::WindowShowState state;
 172
 173     // If true, don't show the window after creation.
 174     bool hidden;
 175
 176     // If true, the window will be resizable by the user. Defaults to true.
 177     bool resizable;
 178
 179     // If true, the window will be focused on creation. Defaults to true.
 180     bool focused;
 181
 182     // If true, the window will stay on top of other windows that are not
 183     // configured to be always on top. Defaults to false.
 184     bool always_on_top;
 185
 186     // The API enables developers to specify content or window bounds. This
 187     // function combines them into a single, constrained window size.
 188     gfx::Rect GetInitialWindowBounds(const gfx::Insets& frame_insets) const;
 189
 190     // The API enables developers to specify content or window size constraints.
 191     // These functions combine them so that we can work with one set of
 192     // constraints.
 193     gfx::Size GetContentMinimumSize(const gfx::Insets& frame_insets) const;
 194     gfx::Size GetContentMaximumSize(const gfx::Insets& frame_insets) const;
 195     gfx::Size GetWindowMinimumSize(const gfx::Insets& frame_insets) const;
 196     gfx::Size GetWindowMaximumSize(const gfx::Insets& frame_insets) const;
 197   };
 198
 199   // Convert draggable regions in raw format to SkRegion format. Caller is
 200   // responsible for deleting the returned SkRegion instance.
 201   static SkRegion* RawDraggableRegionsToSkRegion(
 202       const std::vector<extensions::DraggableRegion>& regions);
 203
 204   // The constructor and Init methods are public for constructing a AppWindow
 205   // with a non-standard render interface (e.g. v1 apps using Ash Panels).
 206   // Normally AppWindow::Create should be used.
 207   // Takes ownership of |app_delegate| and |delegate|.
 208   AppWindow(content::BrowserContext* context,
 209             extensions::AppDelegate* app_delegate,
 210             const extensions::Extension* extension);
 211
 212   // Initializes the render interface, web contents, and native window.
 213   // |app_window_contents| will become owned by AppWindow.
 214   void Init(const GURL& url,
 215             AppWindowContents* app_window_contents,
 216             const CreateParams& params);
 217
 218   const std::string& window_key() const { return window_key_; }
 219   const SessionID& session_id() const { return session_id_; }
 220   const std::string& extension_id() const { return extension_id_; }
 221   content::WebContents* web_contents() const;
 222   WindowType window_type() const { return window_type_; }
 223   bool window_type_is_panel() const {
 224     return (window_type_ == WINDOW_TYPE_PANEL ||
 225             window_type_ == WINDOW_TYPE_V1_PANEL);
 226   }
 227   content::BrowserContext* browser_context() const { return browser_context_; }
 228   const gfx::Image& app_icon() const { return app_icon_; }
 229   const GURL& app_icon_url() const { return app_icon_url_; }
 230   const gfx::Image& badge_icon() const { return badge_icon_; }
 231   const GURL& badge_icon_url() const { return badge_icon_url_; }
 232   bool is_hidden() const { return is_hidden_; }
 233
 234   const extensions::Extension* GetExtension() const;
 235   extensions::NativeAppWindow* GetBaseWindow();
 236   gfx::NativeWindow GetNativeWindow();
 237
 238   // Returns the bounds that should be reported to the renderer.
 239   gfx::Rect GetClientBounds() const;
 240
 241   // NativeAppWindows should call this to determine what the window's title
 242   // is on startup and from within UpdateWindowTitle().
 243   base::string16 GetTitle() const;
 244
 245   // Call to notify ShellRegistry and delete the window. Subclasses should
 246   // invoke this method instead of using "delete this".
 247   void OnNativeClose();
 248
 249   // Should be called by native implementations when the window size, position,
 250   // or minimized/maximized state has changed.
 251   void OnNativeWindowChanged();
 252
 253   // Should be called by native implementations when the window is activated.
 254   void OnNativeWindowActivated();
 255
 256   // Specifies a url for the launcher icon.
 257   void SetAppIconUrl(const GURL& icon_url);
 258
 259   // Specifies a url for the window badge.
 260   void SetBadgeIconUrl(const GURL& icon_url);
 261
 262   // Clear the current badge.
 263   void ClearBadge();
 264
 265   // Set the window shape. Passing a NULL |region| sets the default shape.
 266   void UpdateShape(scoped_ptr<SkRegion> region);
 267
 268   // Called from the render interface to modify the draggable regions.
 269   void UpdateDraggableRegions(
 270       const std::vector<extensions::DraggableRegion>& regions);
 271
 272   // Updates the app image to |image|. Called internally from the image loader
 273   // callback. Also called externally for v1 apps using Ash Panels.
 274   void UpdateAppIcon(const gfx::Image& image);
 275
 276   // Enable or disable fullscreen mode. |type| specifies which type of
 277   // fullscreen mode to change (note that disabling one type of fullscreen may
 278   // not exit fullscreen mode because a window may have a different type of
 279   // fullscreen enabled). If |type| is not FORCED, checks that the extension has
 280   // the required permission.
 281   void SetFullscreen(FullscreenType type, bool enable);
 282
 283   // Returns true if the app window is in a fullscreen state.
 284   bool IsFullscreen() const;
 285
 286   // Returns true if the app window is in a forced fullscreen state (one that
 287   // cannot be exited by the user).
 288   bool IsForcedFullscreen() const;
 289
 290   // Returns true if the app window is in a fullscreen state entered from an
 291   // HTML API request.
 292   bool IsHtmlApiFullscreen() const;
 293
 294   // Transitions window into fullscreen, maximized, minimized or restores based
 295   // on chrome.app.window API.
 296   void Fullscreen();
 297   void Maximize();
 298   void Minimize();
 299   void Restore();
 300
 301   // Transitions to OS fullscreen. See FULLSCREEN_TYPE_OS for more details.
 302   void OSFullscreen();
 303
 304   // Transitions to forced fullscreen. See FULLSCREEN_TYPE_FORCED for more
 305   // details.
 306   void ForcedFullscreen();
 307
 308   // Set the minimum and maximum size of the content bounds.
 309   void SetContentSizeConstraints(const gfx::Size& min_size,
 310                                  const gfx::Size& max_size);
 311
 312   enum ShowType { SHOW_ACTIVE, SHOW_INACTIVE };
 313
 314   // Shows the window if its contents have been painted; otherwise flags the
 315   // window to be shown as soon as its contents are painted for the first time.
 316   void Show(ShowType show_type);
 317
 318   // Hides the window. If the window was previously flagged to be shown on
 319   // first paint, it will be unflagged.
 320   void Hide();
 321
 322   AppWindowContents* app_window_contents_for_test() {
 323     return app_window_contents_.get();
 324   }
 325
 326   int fullscreen_types_for_test() {
 327     return fullscreen_types_;
 328   }
 329
 330   // Set whether the window should stay above other windows which are not
 331   // configured to be always-on-top.
 332   void SetAlwaysOnTop(bool always_on_top);
 333
 334   // Whether the always-on-top property has been set by the chrome.app.window
 335   // API. Note that the actual value of this property in the native app window
 336   // may be false if the bit is silently switched off for security reasons.
 337   bool IsAlwaysOnTop() const;
 338
 339   // Retrieve the current state of the app window as a dictionary, to pass to
 340   // the renderer.
 341   void GetSerializedState(base::DictionaryValue* properties) const;
 342
 343   // Called by the window API when events can be sent to the window for this
 344   // app.
 345   void WindowEventsReady();
 346
 347   // Whether the app window wants to be alpha enabled.
 348   bool requested_alpha_enabled() const { return requested_alpha_enabled_; }
 349
 350  protected:
 351   virtual ~AppWindow();
 352
 353  private:
 354   // PlatformAppBrowserTest needs access to web_contents()
 355   friend class extensions::PlatformAppBrowserTest;
 356
 357   // content::WebContentsDelegate implementation.
 358   virtual void CloseContents(content::WebContents* contents) OVERRIDE;
 359   virtual bool ShouldSuppressDialogs() OVERRIDE;
 360   virtual content::ColorChooser* OpenColorChooser(
 361       content::WebContents* web_contents,
 362       SkColor color,
 363       const std::vector<content::ColorSuggestion>& suggestions) OVERRIDE;
 364   virtual void RunFileChooser(content::WebContents* tab,
 365                               const content::FileChooserParams& params)
 366       OVERRIDE;
 367   virtual bool IsPopupOrPanel(const content::WebContents* source)
 368       const OVERRIDE;
 369   virtual void MoveContents(content::WebContents* source,
 370                             const gfx::Rect& pos) OVERRIDE;
 371   virtual void NavigationStateChanged(
 372       const content::WebContents* source,
 373       content::InvalidateTypes changed_flags) OVERRIDE;
 374   virtual void ToggleFullscreenModeForTab(content::WebContents* source,
 375                                           bool enter_fullscreen) OVERRIDE;
 376   virtual bool IsFullscreenForTabOrPending(const content::WebContents* source)
 377       const OVERRIDE;
 378   virtual void RequestMediaAccessPermission(
 379       content::WebContents* web_contents,
 380       const content::MediaStreamRequest& request,
 381       const content::MediaResponseCallback& callback) OVERRIDE;
 382   virtual content::WebContents* OpenURLFromTab(
 383       content::WebContents* source,
 384       const content::OpenURLParams& params) OVERRIDE;
 385   virtual void AddNewContents(content::WebContents* source,
 386                               content::WebContents* new_contents,
 387                               WindowOpenDisposition disposition,
 388                               const gfx::Rect& initial_pos,
 389                               bool user_gesture,
 390                               bool* was_blocked) OVERRIDE;
 391   virtual bool PreHandleKeyboardEvent(
 392       content::WebContents* source,
 393       const content::NativeWebKeyboardEvent& event,
 394       bool* is_keyboard_shortcut) OVERRIDE;
 395   virtual void HandleKeyboardEvent(content::WebContents* source,
 396                                    const content::NativeWebKeyboardEvent& event)
 397       OVERRIDE;
 398   virtual void RequestToLockMouse(content::WebContents* web_contents,
 399                                   bool user_gesture,
 400                                   bool last_unlocked_by_target) OVERRIDE;
 401   virtual bool PreHandleGestureEvent(content::WebContents* source,
 402                                      const blink::WebGestureEvent& event)
 403       OVERRIDE;
 404
 405   // content::WebContentsObserver implementation.
 406   virtual void DidFirstVisuallyNonEmptyPaint() OVERRIDE;
 407
 408   // content::NotificationObserver implementation.
 409   virtual void Observe(int type,
 410                        const content::NotificationSource& source,
 411                        const content::NotificationDetails& details) OVERRIDE;
 412
 413   // web_modal::WebContentsModalDialogManagerDelegate implementation.
 414   virtual void SetWebContentsBlocked(content::WebContents* web_contents,
 415                                      bool blocked) OVERRIDE;
 416   virtual bool IsWebContentsVisible(content::WebContents* web_contents)
 417       OVERRIDE;
 418
 419   // Saves the window geometry/position/screen bounds.
 420   void SaveWindowPosition();
 421
 422   // Helper method to adjust the cached bounds so that we can make sure it can
 423   // be visible on the screen. See http://crbug.com/145752.
 424   void AdjustBoundsToBeVisibleOnScreen(const gfx::Rect& cached_bounds,
 425                                        const gfx::Rect& cached_screen_bounds,
 426                                        const gfx::Rect& current_screen_bounds,
 427                                        const gfx::Size& minimum_size,
 428                                        gfx::Rect* bounds) const;
 429
 430   // Loads the appropriate default or cached window bounds. Returns a new
 431   // CreateParams that should be used to create the window.
 432   CreateParams LoadDefaults(CreateParams params) const;
 433
 434   // Load the app's image, firing a load state change when loaded.
 435   void UpdateExtensionAppIcon();
 436
 437   // Set the fullscreen state in the native app window.
 438   void SetNativeWindowFullscreen();
 439
 440   // Returns true if there is any overlap between the window and the taskbar
 441   // (Windows only).
 442   bool IntersectsWithTaskbar() const;
 443
 444   // Update the always-on-top bit in the native app window.
 445   void UpdateNativeAlwaysOnTop();
 446
 447   // Sends the onWindowShown event to the app if the window has been shown. Only
 448   // has an effect in tests.
 449   void SendOnWindowShownIfShown();
 450
 451   // web_modal::WebContentsModalDialogManagerDelegate implementation.
 452   virtual web_modal::WebContentsModalDialogHost* GetWebContentsModalDialogHost()
 453       OVERRIDE;
 454
 455   // Updates the badge to |image|. Called internally from the image loader
 456   // callback.
 457   void UpdateBadgeIcon(const gfx::Image& image);
 458
 459   // Callback from web_contents()->DownloadFavicon.
 460   void DidDownloadFavicon(int id,
 461                           int http_status_code,
 462                           const GURL& image_url,
 463                           const std::vector<SkBitmap>& bitmaps,
 464                           const std::vector<gfx::Size>& original_bitmap_sizes);
 465
 466   // extensions::IconImage::Observer implementation.
 467   virtual void OnExtensionIconImageChanged(extensions::IconImage* image)
 468       OVERRIDE;
 469
 470   // The browser context with which this window is associated. AppWindow does
 471   // not own this object.
 472   content::BrowserContext* browser_context_;
 473
 474   const std::string extension_id_;
 475
 476   // Identifier that is used when saving and restoring geometry for this
 477   // window.
 478   std::string window_key_;
 479
 480   const SessionID session_id_;
 481   WindowType window_type_;
 482   content::NotificationRegistrar registrar_;
 483
 484   // Icon shown in the task bar.
 485   gfx::Image app_icon_;
 486
 487   // Icon URL to be used for setting the app icon. If not empty, app_icon_ will
 488   // be fetched and set using this URL.
 489   GURL app_icon_url_;
 490
 491   // An object to load the app's icon as an extension resource.
 492   scoped_ptr<extensions::IconImage> app_icon_image_;
 493
 494   // Badge for icon shown in the task bar.
 495   gfx::Image badge_icon_;
 496
 497   // URL to be used for setting the badge on the app icon.
 498   GURL badge_icon_url_;
 499
 500   // An object to load the badge as an extension resource.
 501   scoped_ptr<extensions::IconImage> badge_icon_image_;
 502
 503   scoped_ptr<extensions::NativeAppWindow> native_app_window_;
 504   scoped_ptr<AppWindowContents> app_window_contents_;
 505   scoped_ptr<extensions::AppDelegate> app_delegate_;
 506   scoped_ptr<extensions::AppWebContentsHelper> helper_;
 507
 508   // Manages popup windows (bubbles, tab-modals) visible overlapping the
 509   // app window.
 510   scoped_ptr<web_modal::PopupManager> popup_manager_;
 511
 512   base::WeakPtrFactory<AppWindow> image_loader_ptr_factory_;
 513
 514   // Bit field of FullscreenType.
 515   int fullscreen_types_;
 516
 517   // Show has been called, so the window should be shown once the first visually
 518   // non-empty paint occurs.
 519   bool show_on_first_paint_;
 520
 521   // The first visually non-empty paint has completed.
 522   bool first_paint_complete_;
 523
 524   // Whether the window has been shown or not.
 525   bool has_been_shown_;
 526
 527   // Whether events can be sent to the window.
 528   bool can_send_events_;
 529
 530   // Whether the window is hidden or not. Hidden in this context means actively
 531   // by the chrome.app.window API, not in an operating system context. For
 532   // example windows which are minimized are not hidden, and windows which are
 533   // part of a hidden app on OS X are not hidden. Windows which were created
 534   // with the |hidden| flag set to true, or which have been programmatically
 535   // hidden, are considered hidden.
 536   bool is_hidden_;
 537
 538   // Whether the delayed Show() call was for an active or inactive window.
 539   ShowType delayed_show_type_;
 540
 541   // Cache the desired value of the always-on-top property. When windows enter
 542   // fullscreen or overlap the Windows taskbar, this property will be
 543   // automatically and silently switched off for security reasons. It is
 544   // reinstated when the window exits fullscreen and moves away from the
 545   // taskbar.
 546   bool cached_always_on_top_;
 547
 548   // Whether |alpha_enabled| was set in the CreateParams.
 549   bool requested_alpha_enabled_;
 550
 551   DISALLOW_COPY_AND_ASSIGN(AppWindow);
 552 };
 553
 554 }  // namespace apps
 555
 556 #endif  // APPS_APP_WINDOW_H_