1 // Copyright (c) 2012 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.
5 #ifndef CHROME_BROWSER_UI_PANELS_PANEL_H_
6 #define CHROME_BROWSER_UI_PANELS_PANEL_H_
10 #include "base/gtest_prod_util.h"
11 #include "base/memory/scoped_ptr.h"
12 #include "base/memory/weak_ptr.h"
13 #include "base/strings/string16.h"
14 #include "chrome/browser/command_updater.h"
15 #include "chrome/browser/command_updater_delegate.h"
16 #include "chrome/browser/ui/panels/panel_constants.h"
17 #include "components/sessions/session_id.h"
18 #include "content/public/browser/notification_observer.h"
19 #include "content/public/browser/notification_registrar.h"
20 #include "extensions/browser/extension_registry_observer.h"
21 #include "ui/base/base_window.h"
22 #include "ui/gfx/image/image.h"
23 #include "ui/gfx/rect.h"
27 class PanelCollection;
31 class StackedPanelCollection;
35 struct NativeWebKeyboardEvent;
38 namespace extensions {
40 class ExtensionRegistry;
41 class WindowController;
44 // A platform independent implementation of ui::BaseWindow for Panels.
45 // This class gets the first crack at all the ui::BaseWindow calls for Panels
46 // and does one or more of the following:
47 // - Do nothing. The function is not relevant to Panels.
48 // - Do Panel specific platform independent processing and then invoke the
49 // function on the platform specific member. For example, restrict panel
50 // size to certain limits.
51 // - Invoke an appropriate PanelManager function to do stuff that might affect
52 // other Panels. For example deleting a panel would rearrange other panels.
53 class Panel : public ui::BaseWindow,
54 public CommandUpdaterDelegate,
55 public content::NotificationObserver,
56 public extensions::ExtensionRegistryObserver {
59 // The panel is fully expanded with both title-bar and the client-area.
61 // The panel is shown with the title-bar only.
63 // The panel is shown with 3-pixel line.
67 // Controls how the attention should be drawn.
69 // Uses the panel attention. The panel's titlebar would be painted
70 // differently to attract the user's attention. This is the default mode.
71 USE_PANEL_ATTENTION = 0x01,
72 // Uses the system attention. On Windows or Linux (depending on Window
73 // Manager), the app icon on taskbar will be flashed. On MacOS, the dock
74 // icon will jump once.
75 USE_SYSTEM_ATTENTION = 0x02
80 // Returns the PanelManager associated with this panel.
81 PanelManager* manager() const;
83 const std::string& app_name() const { return app_name_; }
84 const gfx::Image& app_icon() const { return app_icon_; }
85 const SessionID& session_id() const { return session_id_; }
86 extensions::WindowController* extension_window_controller() const {
87 return extension_window_controller_.get();
89 const std::string extension_id() const;
91 CommandUpdater* command_updater();
92 Profile* profile() const;
94 const extensions::Extension* GetExtension() const;
96 // Returns web contents of the panel, if any. There may be none if web
97 // contents have not been added to the panel yet.
98 content::WebContents* GetWebContents() const;
100 void SetExpansionState(ExpansionState new_expansion_state);
102 bool IsDrawingAttention() const;
104 // This function will only get called by PanelManager when full screen mode
105 // changes i.e it gets called when an app goes into full screen mode or when
106 // an app exits full screen mode. Panel should respond by making sure
107 // a) it does not go on top when some app enters full screen mode.
108 // b) it remains on top when an app exits full screen mode.
109 void FullScreenModeChanged(bool is_full_screen);
111 int TitleOnlyHeight() const;
113 // Returns true if the panel can show minimize or restore button in its
114 // titlebar, depending on its state.
115 bool CanShowMinimizeButton() const;
116 bool CanShowRestoreButton() const;
118 // ui::BaseWindow overrides.
119 bool IsActive() const override;
120 bool IsMaximized() const override;
121 bool IsMinimized() const override;
122 bool IsFullscreen() const override;
123 gfx::NativeWindow GetNativeWindow() const override;
124 gfx::Rect GetRestoredBounds() const override;
125 ui::WindowShowState GetRestoredState() const override;
126 gfx::Rect GetBounds() const override;
127 void Show() override;
128 void Hide() override;
129 void ShowInactive() override;
130 void Close() override;
131 void Activate() override;
132 void Deactivate() override;
133 void Maximize() override;
134 void Minimize() override;
135 void Restore() override;
136 void SetBounds(const gfx::Rect& bounds) override;
137 void FlashFrame(bool flash) override;
138 bool IsAlwaysOnTop() const override;
139 void SetAlwaysOnTop(bool on_top) override;
141 // Overridden from CommandUpdaterDelegate:
142 void ExecuteCommandWithDisposition(int id, WindowOpenDisposition disposition)
145 // content::NotificationObserver overrides.
146 void Observe(int type,
147 const content::NotificationSource& source,
148 const content::NotificationDetails& details) override;
150 // extensions::ExtensionRegistryObserver.
151 void OnExtensionUnloaded(
152 content::BrowserContext* browser_context,
153 const extensions::Extension* extension,
154 extensions::UnloadedExtensionInfo::Reason reason) override;
156 // Construct a native panel implementation.
157 static NativePanel* CreateNativePanel(Panel* panel,
158 const gfx::Rect& bounds,
161 NativePanel* native_panel() const { return native_panel_; }
163 // Invoked when the native panel has detected a mouse click on the
164 // panel's titlebar, minimize or restore buttons. Behavior of the
165 // click may be modified as indicated by |modifier|.
166 void OnTitlebarClicked(panel::ClickModifier modifier);
167 void OnMinimizeButtonClicked(panel::ClickModifier modifier);
168 void OnRestoreButtonClicked(panel::ClickModifier modifier);
170 // Used on platforms where the panel cannot determine its window size
171 // until the window has been created. (e.g. GTK)
172 void OnWindowSizeAvailable();
174 // Asynchronous completion of panel close request.
175 void OnNativePanelClosed();
178 // * panel is newly created and has not been positioned yet.
179 // * panel is being closed asynchronously.
180 // Please use it with caution.
181 PanelCollection* collection() const { return collection_; }
183 // Sets the current panel collection that contains this panel.
184 void set_collection(PanelCollection* new_collection) {
185 collection_ = new_collection;
188 StackedPanelCollection* stack() const;
190 ExpansionState expansion_state() const { return expansion_state_; }
191 const gfx::Size& min_size() const { return min_size_; }
192 const gfx::Size& max_size() const { return max_size_; }
193 bool auto_resizable() const { return auto_resizable_; }
195 bool in_preview_mode() const { return in_preview_mode_; }
197 panel::Resizability CanResizeByMouse() const;
199 AttentionMode attention_mode() const { return attention_mode_; }
200 void set_attention_mode(AttentionMode attention_mode) {
201 attention_mode_ = attention_mode;
204 // The full size is the size of the panel when it is detached or expanded
205 // in the docked collection and squeezing mode is not on.
206 gfx::Size full_size() const { return full_size_; }
207 void set_full_size(const gfx::Size& size) { full_size_ = size; }
209 // Panel must be initialized to be "fully created" and ready for use.
210 // Only called by PanelManager.
211 bool initialized() const { return initialized_; }
212 void Initialize(const GURL& url, const gfx::Rect& bounds, bool always_on_top);
214 // This is different from BaseWindow::SetBounds():
215 // * SetPanelBounds() is only called by PanelManager to manage its position.
216 // * SetBounds() is called by the API to try to change the bounds, which may
217 // only change the size for Panel.
218 void SetPanelBounds(const gfx::Rect& bounds);
220 // Updates the panel bounds instantly without any animation.
221 void SetPanelBoundsInstantly(const gfx::Rect& bounds);
223 // Ensures that the panel's size does not exceed the work area by updating
224 // maximum and full size of the panel. This is called each time when display
225 // settings are changed. Note that bounds are not updated here and the call
226 // of setting bounds or refreshing layout should be called after this.
227 void LimitSizeToWorkArea(const gfx::Rect& work_area);
229 // Sets whether the panel will auto resize according to its content.
230 void SetAutoResizable(bool resizable);
232 // Configures the web contents for auto resize, including configurations
233 // on the renderer and detecting renderer changes.
234 void EnableWebContentsAutoResize(content::WebContents* web_contents);
236 // Invoked when the preferred window size of the given panel might need to
237 // get changed due to the contents being auto-resized.
238 void OnContentsAutoResized(const gfx::Size& new_content_size);
240 // Resizes the panel and sets the origin. Invoked when the panel is resized
242 void OnWindowResizedByMouse(const gfx::Rect& new_bounds);
244 // Sets minimum and maximum size for the panel.
245 void SetSizeRange(const gfx::Size& min_size, const gfx::Size& max_size);
247 // Updates the maximum size of the panel so that it's never smaller than the
248 // panel's desired size. Note that even if the user resizes the panel smaller
249 // later, the increased maximum size will still be in effect. Since it's not
250 // possible currently to switch the panel back to autosizing from
251 // user-resizable, it should not be a problem.
252 void IncreaseMaxSize(const gfx::Size& desired_panel_size);
254 // Handles keyboard events coming back from the renderer.
255 void HandleKeyboardEvent(const content::NativeWebKeyboardEvent& event);
257 // Sets whether the panel is shown in preview mode. When the panel is
258 // being dragged, it is in preview mode.
259 void SetPreviewMode(bool in_preview_mode);
261 // Sets whether the minimize or restore button, if any, are visible.
262 void UpdateMinimizeRestoreButtonVisibility();
264 // Changes the preferred size to acceptable based on min_size() and max_size()
265 gfx::Size ClampSize(const gfx::Size& size) const;
267 // Called when the panel's active state changes.
268 // |active| is true if panel became active.
269 void OnActiveStateChanged(bool active);
271 // Called when the panel starts/ends the user resizing.
272 void OnPanelStartUserResizing();
273 void OnPanelEndUserResizing();
275 // Gives beforeunload handlers the chance to cancel the close.
276 bool ShouldCloseWindow();
278 // Invoked when the window containing us is closing. Performs the necessary
280 void OnWindowClosing();
282 // Executes a command if it's enabled.
283 // Returns true if the command is executed.
284 bool ExecuteCommandIfEnabled(int id);
286 // Gets the title of the window from the web contents.
287 base::string16 GetWindowTitle() const;
289 // Gets the Favicon of the web contents.
290 gfx::Image GetCurrentPageIcon() const;
292 // Updates the title bar to display the current title and icon.
293 void UpdateTitleBar();
295 // Updates UI to reflect change in loading state.
296 void LoadingStateChanged(bool is_loading);
298 // Updates UI to reflect that the web cotents receives the focus.
299 void WebContentsFocused(content::WebContents* contents);
301 // Moves the panel by delta instantly.
302 void MoveByInstantly(const gfx::Vector2d& delta_origin);
304 // Applies |corner_style| to the panel window.
305 void SetWindowCornerStyle(panel::CornerStyle corner_style);
307 // Performs the system minimize for the panel, i.e. becoming iconic.
308 void MinimizeBySystem();
310 bool IsMinimizedBySystem() const;
312 // Returns true if the panel is shown in the active desktop. The user could
313 // create or use multiple desktops or workspaces.
314 bool IsShownOnActiveDesktop() const;
316 // Turns on/off the shadow effect around the window shape.
317 void ShowShadow(bool show);
320 // Panel can only be created using PanelManager::CreatePanel() or subclass.
321 // |app_name| is the default title for Panels when the page content does not
322 // provide a title. For extensions, this is usually the application name
323 // generated from the extension id.
324 Panel(Profile* profile, const std::string& app_name,
325 const gfx::Size& min_size, const gfx::Size& max_size);
328 friend class PanelManager;
329 friend class PanelBrowserTest;
332 // Default maximum size is proportional to the work area.
334 // Custom maximum size is used when the panel is resized by the user.
338 void OnImageLoaded(const gfx::Image& image);
340 // Initialize state for all supported commands.
341 void InitCommandState();
343 // Configures the renderer for auto resize (if auto resize is enabled).
344 void ConfigureAutoResize(content::WebContents* web_contents);
346 // Load the app's image, firing a load state change when loaded.
347 void UpdateAppIcon();
349 // Prepares a title string for display (removes embedded newlines, etc).
350 static void FormatTitleForDisplay(base::string16* title);
352 // The application name that is also the name of the window when the
353 // page content does not provide a title.
354 // This name should be set when the panel is created.
355 const std::string app_name_;
359 // Current collection of panels to which this panel belongs. This determines
360 // the panel's screen layout.
361 PanelCollection* collection_; // Owned by PanelManager.
365 // Stores the full size of the panel so we can restore it after it's
366 // been minimized or squeezed due to lack of space in the collection.
367 gfx::Size full_size_;
369 // This is the minimum size that the panel can shrink to.
372 // This is the size beyond which the panel is not going to grow to accomodate
373 // the growing content and WebKit would add the scrollbars in such case.
376 MaxSizePolicy max_size_policy_;
378 // True if this panel auto resizes based on content.
379 bool auto_resizable_;
381 // True if this panel is in preview mode. When in preview mode, panel bounds
382 // should not be affected by layout refresh. This is currently used by drag
383 // controller to add a panel to the collection without causing its bounds to
385 bool in_preview_mode_;
387 // Platform specifc implementation for panels. It'd be one of
388 // PanelGtk/PanelView/PanelCocoa.
389 NativePanel* native_panel_; // Weak, owns us.
391 AttentionMode attention_mode_;
393 ExpansionState expansion_state_;
395 // The CommandUpdater manages the window commands.
396 CommandUpdater command_updater_;
398 content::NotificationRegistrar registrar_;
399 extensions::ExtensionRegistry* extension_registry_;
400 const SessionID session_id_;
401 scoped_ptr<extensions::WindowController> extension_window_controller_;
402 scoped_ptr<PanelHost> panel_host_;
404 // Icon showed in the task bar.
405 gfx::Image app_icon_;
407 base::WeakPtrFactory<Panel> image_loader_ptr_factory_;
409 DISALLOW_COPY_AND_ASSIGN(Panel);
412 #endif // CHROME_BROWSER_UI_PANELS_PANEL_H_