// 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.

#include "content/shell/shell.h"

#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>

#include "base/logging.h"
#include "base/message_loop.h"
#include "base/string_piece.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/native_web_keyboard_event.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_view.h"
#include "content/public/common/renderer_preferences.h"
#include "third_party/skia/include/core/SkColor.h"

namespace content {

void Shell::PlatformInitialize() {
  gtk_init(NULL, NULL);
}

base::StringPiece Shell::PlatformResourceProvider(int key) {
  NOTIMPLEMENTED();
  return base::StringPiece();
}

void Shell::PlatformCleanUp() {
  // Nothing to clean up; GTK will clean up the widgets shortly after.
}

void Shell::PlatformEnableUIControl(UIControl control, bool is_enabled) {
  GtkToolItem* item = NULL;
  switch (control) {
    case BACK_BUTTON:
      item = back_button_;
      break;
    case FORWARD_BUTTON:
      item = forward_button_;
      break;
    case STOP_BUTTON:
      item = stop_button_;
      break;
    default:
      NOTREACHED() << "Unknown UI control";
      return;
  }
  gtk_widget_set_sensitive(GTK_WIDGET(item), is_enabled);
}

void Shell::PlatformSetAddressBarURL(const GURL& url) {
  gtk_entry_set_text(GTK_ENTRY(url_edit_view_), url.spec().c_str());
}

void Shell::PlatformSetIsLoading(bool loading) {
  if (loading)
    gtk_spinner_start(GTK_SPINNER(spinner_));
  else
    gtk_spinner_stop(GTK_SPINNER(spinner_));
}

void Shell::PlatformCreateWindow(int width, int height) {
  window_ = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
  gtk_window_set_title(window_, "Content Shell");
  g_signal_connect(G_OBJECT(window_), "destroy",
                   G_CALLBACK(OnWindowDestroyedThunk), this);

  vbox_ = gtk_vbox_new(FALSE, 0);

  // Create the object that mediates accelerators.
  GtkAccelGroup* accel_group = gtk_accel_group_new();
  gtk_window_add_accel_group(GTK_WINDOW(window_), accel_group);

  // Set global window handling accelerators:
  gtk_accel_group_connect(
      accel_group, GDK_w, GDK_CONTROL_MASK,
      GTK_ACCEL_VISIBLE,
      g_cclosure_new(G_CALLBACK(OnCloseWindowKeyPressedThunk),
                     this, NULL));

  GtkWidget* toolbar = gtk_toolbar_new();
  // Turn off the labels on the toolbar buttons.
  gtk_toolbar_set_style(GTK_TOOLBAR(toolbar), GTK_TOOLBAR_ICONS);

  back_button_ = gtk_tool_button_new_from_stock(GTK_STOCK_GO_BACK);
  g_signal_connect(back_button_, "clicked",
                   G_CALLBACK(&OnBackButtonClickedThunk), this);
  gtk_toolbar_insert(GTK_TOOLBAR(toolbar), back_button_, -1 /* append */);
  gtk_widget_add_accelerator(GTK_WIDGET(back_button_), "clicked", accel_group,
                             GDK_Left, GDK_MOD1_MASK, GTK_ACCEL_VISIBLE);

  forward_button_ = gtk_tool_button_new_from_stock(GTK_STOCK_GO_FORWARD);
  g_signal_connect(forward_button_, "clicked",
                   G_CALLBACK(&OnForwardButtonClickedThunk), this);
  gtk_toolbar_insert(GTK_TOOLBAR(toolbar), forward_button_, -1 /* append */);
  gtk_widget_add_accelerator(GTK_WIDGET(forward_button_), "clicked",
                             accel_group,
                             GDK_Right, GDK_MOD1_MASK, GTK_ACCEL_VISIBLE);

  reload_button_ = gtk_tool_button_new_from_stock(GTK_STOCK_REFRESH);
  g_signal_connect(reload_button_, "clicked",
                   G_CALLBACK(&OnReloadButtonClickedThunk), this);
  gtk_toolbar_insert(GTK_TOOLBAR(toolbar), reload_button_, -1 /* append */);
  gtk_widget_add_accelerator(GTK_WIDGET(reload_button_), "clicked",
                             accel_group,
                             GDK_r, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);

  stop_button_ = gtk_tool_button_new_from_stock(GTK_STOCK_STOP);
  g_signal_connect(stop_button_, "clicked",
                   G_CALLBACK(&OnStopButtonClickedThunk), this);
  gtk_toolbar_insert(GTK_TOOLBAR(toolbar), stop_button_, -1 /* append */);

  url_edit_view_ = gtk_entry_new();
  g_signal_connect(G_OBJECT(url_edit_view_), "activate",
                   G_CALLBACK(&OnURLEntryActivateThunk), this);

  gtk_accel_group_connect(
      accel_group, GDK_l, GDK_CONTROL_MASK,
      GTK_ACCEL_VISIBLE,
      g_cclosure_new(G_CALLBACK(OnHighlightURLViewThunk),
                     this, NULL));

  GtkToolItem* tool_item = gtk_tool_item_new();
  gtk_container_add(GTK_CONTAINER(tool_item), url_edit_view_);
  gtk_tool_item_set_expand(tool_item, TRUE);
  gtk_toolbar_insert(GTK_TOOLBAR(toolbar), tool_item, -1 /* append */);

  // Center a 20x20 spinner in a 26x24 area.
  GtkWidget* spinner_alignment = gtk_alignment_new(0.5, 0.5, 0, 0);
  gtk_alignment_set_padding(GTK_ALIGNMENT(spinner_alignment), 2, 2, 4, 4);
  spinner_ = gtk_spinner_new();
  gtk_widget_set_size_request(spinner_, 20, 20);
  gtk_container_add(GTK_CONTAINER(spinner_alignment), spinner_);

  spinner_item_ = gtk_tool_item_new();
  gtk_container_add(GTK_CONTAINER(spinner_item_), spinner_alignment);
  gtk_toolbar_insert(GTK_TOOLBAR(toolbar), spinner_item_, -1 /* append */);

  gtk_box_pack_start(GTK_BOX(vbox_), toolbar, FALSE, FALSE, 0);

  gtk_container_add(GTK_CONTAINER(window_), vbox_);
  gtk_widget_show_all(GTK_WIDGET(window_));

  SizeTo(width, height);
}

void Shell::PlatformSetContents() {
  WebContentsView* content_view = web_contents_->GetView();
  gtk_container_add(GTK_CONTAINER(vbox_), content_view->GetNativeView());

  // As an additional requirement on Linux, we must set the colors for the
  // render widgets in webkit.
  content::RendererPreferences* prefs =
      web_contents_->GetMutableRendererPrefs();
  prefs->focus_ring_color = SkColorSetARGB(255, 229, 151, 0);
  prefs->thumb_active_color = SkColorSetRGB(244, 244, 244);
  prefs->thumb_inactive_color = SkColorSetRGB(234, 234, 234);
  prefs->track_color = SkColorSetRGB(211, 211, 211);

  prefs->active_selection_bg_color = SkColorSetRGB(30, 144, 255);
  prefs->active_selection_fg_color = SK_ColorWHITE;
  prefs->inactive_selection_bg_color = SkColorSetRGB(200, 200, 200);
  prefs->inactive_selection_fg_color = SkColorSetRGB(50, 50, 50);
}

void Shell::SizeTo(int width, int height) {
  content_width_ = width;
  content_height_ = height;
  if (web_contents_.get()) {
    gtk_widget_set_size_request(web_contents_->GetNativeView(), width, height);
  }
}

void Shell::PlatformResizeSubViews() {
  SizeTo(content_width_, content_height_);
}

void Shell::OnBackButtonClicked(GtkWidget* widget) {
  GoBackOrForward(-1);
}

void Shell::OnForwardButtonClicked(GtkWidget* widget) {
  GoBackOrForward(1);
}

void Shell::OnReloadButtonClicked(GtkWidget* widget) {
  Reload();
}

void Shell::OnStopButtonClicked(GtkWidget* widget) {
  Stop();
}

void Shell::OnURLEntryActivate(GtkWidget* entry) {
  const gchar* str = gtk_entry_get_text(GTK_ENTRY(entry));
  GURL url(str);
  if (!url.has_scheme())
    url = GURL(std::string("http://") + std::string(str));
  LoadURL(GURL(url));
}

// Callback for when the main window is destroyed.
gboolean Shell::OnWindowDestroyed(GtkWidget* window) {
  delete this;

  if (windows_.empty()) {
    MessageLoop::current()->PostTask(FROM_HERE,
                                     MessageLoop::QuitClosure());
  }

  return FALSE;  // Don't stop this message.
}

gboolean Shell::OnCloseWindowKeyPressed(GtkAccelGroup* accel_group,
                                        GObject* acceleratable,
                                        guint keyval,
                                        GdkModifierType modifier) {
  gtk_widget_destroy(GTK_WIDGET(window_));
  return TRUE;
}

gboolean Shell::OnHighlightURLView(GtkAccelGroup* accel_group,
                                   GObject* acceleratable,
                                   guint keyval,
                                   GdkModifierType modifier) {
  gtk_widget_grab_focus(GTK_WIDGET(url_edit_view_));
  return TRUE;
}

}  // namespace content