Panels refactor: Support browserless panels on Linux.

chrome/browser/ui/panels/panel_gtk.h

+// Copyright (c) 2012 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.
+
+#ifndef CHROME_BROWSER_UI_PANELS_PANEL_GTK_H_
+#define CHROME_BROWSER_UI_PANELS_PANEL_GTK_H_
+
+#include <gtk/gtk.h>
+#include <map>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/timer.h"
+#include "chrome/browser/ui/panels/native_panel.h"
+#include "ui/base/animation/animation_delegate.h"
+#include "ui/base/gtk/gtk_signal.h"
+#include "ui/base/x/active_window_watcher_x_observer.h"
+#include "ui/gfx/rect.h"
+
+class Panel;
+class PanelBoundsAnimation;
+class PanelTitlebarGtk;
+class PanelDragGtk;
+class GtkNativePanelTesting;
+
+namespace gfx {
+class Image;
+}
+
+// An implementation of the native panel in GTK.
+class PanelGtk : public NativePanel,
+                 public ui::ActiveWindowWatcherXObserver,
+                 public ui::AnimationDelegate {
+ public:
+  enum PaintState {
+    PAINT_AS_ACTIVE,
+    PAINT_AS_INACTIVE,
+    PAINT_AS_MINIMIZED,
+    PAINT_FOR_ATTENTION
+  };
+
+  PanelGtk(Panel* panel, const gfx::Rect& bounds);
+  virtual ~PanelGtk();
+
+  void Init();
+
+  // Overridden from NativePanel.
+  virtual void ShowPanel() OVERRIDE;
+  virtual void ShowPanelInactive() OVERRIDE;
+  virtual gfx::Rect GetPanelBounds() const OVERRIDE;
+  virtual void SetPanelBounds(const gfx::Rect& bounds) OVERRIDE;
+  virtual void SetPanelBoundsInstantly(const gfx::Rect& bounds) OVERRIDE;
+  virtual void ClosePanel() OVERRIDE;
+  virtual void ActivatePanel() OVERRIDE;
+  virtual void DeactivatePanel() OVERRIDE;
+  virtual bool IsPanelActive() const OVERRIDE;
+  virtual void PreventActivationByOS(bool prevent_activation) OVERRIDE;
+  virtual gfx::NativeWindow GetNativePanelHandle() OVERRIDE;
+  virtual void UpdatePanelTitleBar() OVERRIDE;
+  virtual void UpdatePanelLoadingAnimations(bool should_animate) OVERRIDE;
+  virtual FindBar* CreatePanelFindBar() OVERRIDE;
+  virtual void NotifyPanelOnUserChangedTheme() OVERRIDE;
+  virtual void PanelCut() OVERRIDE;
+  virtual void PanelCopy() OVERRIDE;
+  virtual void PanelPaste() OVERRIDE;
+  virtual void DrawAttention(bool draw_attention) OVERRIDE;
+  virtual bool IsDrawingAttention() const OVERRIDE;
+  virtual bool PreHandlePanelKeyboardEvent(
+      const content::NativeWebKeyboardEvent& event,
+      bool* is_keyboard_shortcut) OVERRIDE;
+  virtual void HandlePanelKeyboardEvent(
+      const content::NativeWebKeyboardEvent& event) OVERRIDE;
+  virtual void FullScreenModeChanged(bool is_full_screen) OVERRIDE;
+  virtual void PanelExpansionStateChanging(
+      Panel::ExpansionState old_state,
+      Panel::ExpansionState new_state) OVERRIDE;
+  virtual void AttachWebContents(content::WebContents* contents) OVERRIDE;
+  virtual void DetachWebContents(content::WebContents* contents) OVERRIDE;
+  virtual Browser* GetPanelBrowser() const OVERRIDE;
+  // These sizes are in screen coordinates.
+  virtual gfx::Size WindowSizeFromContentSize(
+      const gfx::Size& content_size) const OVERRIDE;
+  virtual gfx::Size ContentSizeFromWindowSize(
+      const gfx::Size& window_size) const OVERRIDE;
+  virtual int TitleOnlyHeight() const OVERRIDE;
+  virtual void EnsurePanelFullyVisible() OVERRIDE;
+  virtual void SetPanelAlwaysOnTop(bool on_top) OVERRIDE;
+  virtual void EnableResizeByMouse(bool enable) OVERRIDE;
+  virtual void UpdatePanelMinimizeRestoreButtonVisibility() OVERRIDE;
+
+  virtual NativePanelTesting* CreateNativePanelTesting() OVERRIDE;
+
+  // Overridden from ActiveWindowWatcherXObserver.
+  virtual void ActiveWindowChanged(GdkWindow* active_window) OVERRIDE;
+
+  bool UsingDefaultTheme() const;
+
+  Panel* panel() const { return panel_.get(); }
+  PaintState paint_state() const { return paint_state_; }
+  PanelTitlebarGtk* titlebar() const { return titlebar_.get(); }
+
+ private:
+  friend class GtkNativePanelTesting;
+
+  // Applies our custom window shape with rounded top corners.
+  void UpdateWindowShape(int width, int height);
+
+  // Checks to see if the mouse pointer at |x|, |y| is over the border of the
+  // custom frame (a spot that should trigger a window resize). Returns true if
+  // it should and sets |edge|.
+  bool GetWindowEdge(int x, int y, GdkWindowEdge* edge) const;
+
+  // Connect/disconnect accelerators for keyboard shortcut support.
+  void ConnectAccelerators();
+  void DisconnectAccelerators();
+
+  // Returns the image to paint the frame.
+  const gfx::Image* GetFrameBackground() const;
+  const gfx::Image* GetDefaultFrameBackground() const;
+  const gfx::Image* GetThemedFrameBackground() const;
+
+  // Animation when panel is first shown.
+  void RevealPanel();
+
+  void StartBoundsAnimation(const gfx::Rect& from_bounds,
+                            const gfx::Rect& to_bounds);
+  bool IsAnimatingBounds() const;
+
+  // Overridden from AnimationDelegate:
+  virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
+  virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
+
+  // Creates helper for handling drags if not already created.
+  void EnsureDragHelperCreated();
+
+  void SetBoundsInternal(const gfx::Rect& bounds, bool animate);
+
+  void LoadingAnimationCallback();
+
+  // Returns the size of the window frame around the client content area.
+  gfx::Size GetNonClientFrameSize() const;
+
+  // Invalidate window to force repaint.
+  void InvalidateWindow();
+
+  // Callback for accelerator activation. |user_data| stores the command id
+  // of the matched accelerator.
+  static gboolean OnGtkAccelerator(GtkAccelGroup* accel_group,
+                                   GObject* acceleratable,
+                                   guint keyval,
+                                   GdkModifierType modifier,
+                                   void* user_data);
+
+  CHROMEGTK_CALLBACK_1(PanelGtk, gboolean, OnMainWindowDeleteEvent,
+                       GdkEvent*);
+  CHROMEGTK_CALLBACK_0(PanelGtk, void, OnMainWindowDestroy);
+  CHROMEGTK_CALLBACK_1(PanelGtk, gboolean, OnConfigure, GdkEventConfigure*);
+  // Callback for when the custom frame alignment needs to be redrawn.
+  CHROMEGTK_CALLBACK_1(PanelGtk, gboolean, OnCustomFrameExpose,
+                       GdkEventExpose*);
+  // Key press event callback.
+  CHROMEGTK_CALLBACK_1(PanelGtk, gboolean, OnKeyPress, GdkEventKey*);
+  // Mouse move and button press callbacks. If mouse hits titlebar,
+  // the titlebar gets the event, else the window gets the button press.
+  CHROMEGTK_CALLBACK_1(PanelGtk, gboolean, OnMouseMoveEvent,
+                       GdkEventMotion*);
+  CHROMEGTK_CALLBACK_1(PanelGtk, gboolean, OnButtonPressEvent,
+                       GdkEventButton*);
+  CHROMEGTK_CALLBACK_1(PanelGtk, gboolean,
+                       OnTitlebarButtonPressEvent, GdkEventButton*);
+  CHROMEGTK_CALLBACK_1(PanelGtk, gboolean,
+                       OnTitlebarButtonReleaseEvent, GdkEventButton*);
+
+  scoped_ptr<Panel> panel_;
+  gfx::Rect bounds_;
+
+  // True after panel has been shown.
+  bool is_shown_;
+
+  scoped_ptr<PanelDragGtk> drag_helper_;
+
+  // The configure size of the current window, used to figure out whether to
+  // ignore later configure events. See OnConfigure() for more information.
+  gfx::Size configure_size_;
+
+  // Indicates different painting state, active, drawing attention or else.
+  PaintState paint_state_;
+
+  // Indicates that the panel is currently drawing attention.
+  bool is_drawing_attention_;
+
+  // Used to animate the bounds change.
+  scoped_ptr<PanelBoundsAnimation> bounds_animator_;
+  gfx::Rect animation_start_bounds_;
+
+  // This records the bounds set on the last animation progress notification.
+  // We need this for the case where a new bounds animation starts before the
+  // current one completes. In this case, we want to start the new animation
+  // from where the last one left.
+  gfx::Rect last_animation_progressed_bounds_;
+
+  // The timer used to update frames for the Loading Animation.
+  base::RepeatingTimer<PanelGtk> loading_animation_timer_;
+
+  // The current window cursor.  We set it to a resize cursor when over the
+  // custom frame border.  We set it to NULL if we want the default cursor.
+  GdkCursor* frame_cursor_;
+
+  // True if the window manager thinks the window is active.  Not all window
+  // managers keep track of this state (_NET_ACTIVE_WINDOW), in which case
+  // this will always be true.
+  bool is_active_;
+
+  // Top level window.
+  GtkWindow* window_;
+  // GtkAlignment that holds the interior components of the chromium window.
+  // This is used to draw the custom frame border and content shadow.
+  GtkWidget* window_container_;
+  // VBox that holds everything (titlebar, web contents).
+  GtkWidget* window_vbox_;
+  // EventBox that holds web contents.
+  GtkWidget* render_area_event_box_;
+  // We insert and remove WebContents GtkWidgets into this expanded.
+  GtkWidget* contents_expanded_;
+
+  // The accelerator group used to handle accelerators, owned by this object.
+  GtkAccelGroup* accel_group_;
+
+  // The container for the titlebar.
+  scoped_ptr<PanelTitlebarGtk> titlebar_;
+
+  DISALLOW_COPY_AND_ASSIGN(PanelGtk);
+};
+
+#endif  // CHROME_BROWSER_UI_PANELS_PANEL_GTK_H_