// Copyright (c) 2010 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_AUTOCOMPLETE_AUTOCOMPLETE_POPUP_VIEW_GTK_H_
#define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_POPUP_VIEW_GTK_H_
#pragma once

#include <gtk/gtk.h>
#include <map>

#include "base/basictypes.h"
#include "base/scoped_ptr.h"
#include "chrome/browser/autocomplete/autocomplete_popup_view.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
#include "webkit/glue/window_open_disposition.h"

class AutocompleteEditModel;
class AutocompleteEditView;
class AutocompleteMatch;
class AutocompletePopupModel;
class GtkThemeProvider;
class Profile;
class SkBitmap;

class AutocompletePopupViewGtk : public AutocompletePopupView,
                                 public NotificationObserver {
 public:
  AutocompletePopupViewGtk(AutocompleteEditView* edit_view,
                           AutocompleteEditModel* edit_model,
                           Profile* profile,
                           GtkWidget* location_bar);
  ~AutocompletePopupViewGtk();

  // Overridden from AutocompletePopupView:
  virtual bool IsOpen() const { return opened_; }
  virtual void InvalidateLine(size_t line);
  virtual void UpdatePopupAppearance();
  virtual void PaintUpdatesNow();
  virtual void OnDragCanceled();
  virtual AutocompletePopupModel* GetModel();

  // Overridden from NotificationObserver:
  virtual void Observe(NotificationType type,
                       const NotificationSource& source,
                       const NotificationDetails& details);

 private:
  void Show(size_t num_results);
  void Hide();

  // Restack the popup window directly above the browser's toplevel window.
  void StackWindow();

  // Convert a y-coordinate to the closest line / result.
  size_t LineFromY(int y);

  // Accept a line of the results, for example, when the user clicks a line.
  void AcceptLine(size_t line, WindowOpenDisposition disposition);

  GdkPixbuf* IconForMatch(const AutocompleteMatch& match, bool selected);

  static gboolean HandleExposeThunk(GtkWidget* widget, GdkEventExpose* event,
                                    gpointer userdata) {
    return reinterpret_cast<AutocompletePopupViewGtk*>(userdata)->
        HandleExpose(widget, event);
  }
  gboolean HandleExpose(GtkWidget* widget, GdkEventExpose* event);

  static gboolean HandleMotionThunk(GtkWidget* widget, GdkEventMotion* event,
                                    gpointer userdata) {
    return reinterpret_cast<AutocompletePopupViewGtk*>(userdata)->
        HandleMotion(widget, event);
  }
  gboolean HandleMotion(GtkWidget* widget, GdkEventMotion* event);

  static gboolean HandleButtonPressThunk(GtkWidget* widget,
                                         GdkEventButton* event,
                                         gpointer userdata) {
    return reinterpret_cast<AutocompletePopupViewGtk*>(userdata)->
        HandleButtonPress(widget, event);
  }
  gboolean HandleButtonPress(GtkWidget* widget, GdkEventButton* event);

  static gboolean HandleButtonReleaseThunk(GtkWidget* widget,
                                           GdkEventButton* event,
                                           gpointer userdata) {
    return reinterpret_cast<AutocompletePopupViewGtk*>(userdata)->
        HandleButtonRelease(widget, event);
  }
  gboolean HandleButtonRelease(GtkWidget* widget, GdkEventButton* event);

  scoped_ptr<AutocompletePopupModel> model_;
  AutocompleteEditView* edit_view_;
  GtkWidget* location_bar_;

  // Our popup window, which is the only widget used, and we paint it on our
  // own.  This widget shouldn't be exposed outside of this class.
  GtkWidget* window_;
  // The pango layout object created from the window, cached across exposes.
  PangoLayout* layout_;

  GtkThemeProvider* theme_provider_;
  NotificationRegistrar registrar_;

  // Used to cache GdkPixbufs and map them from the SkBitmaps they were created
  // from.
  typedef std::map<const SkBitmap*, GdkPixbuf*> PixbufMap;
  PixbufMap pixbufs_;

  // A list of colors which we should use for drawing the popup. These change
  // between gtk and normal mode.
  GdkColor border_color_;
  GdkColor background_color_;
  GdkColor selected_background_color_;
  GdkColor hovered_background_color_;
  GdkColor content_text_color_;
  GdkColor selected_content_text_color_;
  GdkColor url_text_color_;
  GdkColor url_selected_text_color_;
  GdkColor description_text_color_;
  GdkColor description_selected_text_color_;

  // If the user cancels a dragging action (i.e. by pressing ESC), we don't have
  // a convenient way to release mouse capture. Instead we use this flag to
  // simply ignore all remaining drag events, and the eventual mouse release
  // event. Since OnDragCanceled() can be called when we're not dragging, this
  // flag is reset to false on a mouse pressed event, to make sure we don't
  // erroneously ignore the next drag.
  bool ignore_mouse_drag_;

  // Whether our popup is currently open / shown, or closed / hidden.
  bool opened_;

  DISALLOW_COPY_AND_ASSIGN(AutocompletePopupViewGtk);
};

#endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_POPUP_VIEW_GTK_H_