root/chrome/browser/ui/views/extensions/extension_dialog.cc

DEFINITIONS

1. observer_
2. Show
3. InitWindow
4. ObserverDestroyed
5. MaybeFocusRenderView
6. GetDialogButtons
7. CanResize
8. SetMinimumContentsSize
9. GetModalType
10. ShouldShowWindowTitle
11. GetWindowTitle
12. WindowClosing
13. DeleteDelegate
14. GetWidget
15. GetWidget
16. GetContentsView
17. UseNewStyleForThisDialog
18. Observe

// 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 "chrome/browser/ui/views/extensions/extension_dialog.h"

#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/extensions/extension_view_host.h"
#include "chrome/browser/extensions/extension_view_host_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/views/constrained_window_views.h"
#include "chrome/browser/ui/views/extensions/extension_dialog_observer.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_view.h"
#include "ui/base/base_window.h"
#include "ui/gfx/screen.h"
#include "ui/views/background.h"
#include "ui/views/widget/widget.h"
#include "url/gurl.h"

using content::BrowserContext;
using content::WebContents;

ExtensionDialog::ExtensionDialog(extensions::ExtensionViewHost* host,
                                 ExtensionDialogObserver* observer)
    : host_(host),
      observer_(observer) {
  AddRef();  // Balanced in DeleteDelegate();

  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING,
                 content::Source<BrowserContext>(host->browser_context()));
  // Listen for the containing view calling window.close();
  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_HOST_VIEW_SHOULD_CLOSE,
                 content::Source<BrowserContext>(host->browser_context()));
  // Listen for a crash or other termination of the extension process.
  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_PROCESS_TERMINATED,
                 content::Source<BrowserContext>(host->browser_context()));
}

ExtensionDialog::~ExtensionDialog() {
}

// static
ExtensionDialog* ExtensionDialog::Show(
    const GURL& url,
    aura::Window* parent_window,
    Profile* profile,
    WebContents* web_contents,
    int width,
    int height,
    int min_width,
    int min_height,
    const base::string16& title,
    ExtensionDialogObserver* observer) {
  extensions::ExtensionViewHost* host =
      extensions::ExtensionViewHostFactory::CreateDialogHost(url, profile);
  if (!host)
    return NULL;
  // Preferred size must be set before views::Widget::CreateWindowWithParent
  // is called because CreateWindowWithParent refers the result of CanResize().
  host->view()->SetPreferredSize(gfx::Size(width, height));
  host->view()->set_minimum_size(gfx::Size(min_width, min_height));
  host->SetAssociatedWebContents(web_contents);

  DCHECK(parent_window);
  ExtensionDialog* dialog = new ExtensionDialog(host, observer);
  dialog->set_title(title);
  dialog->InitWindow(parent_window, width, height);

  // Show a white background while the extension loads.  This is prettier than
  // flashing a black unfilled window frame.
  host->view()->set_background(
      views::Background::CreateSolidBackground(0xFF, 0xFF, 0xFF));
  host->view()->SetVisible(true);

  // Ensure the DOM JavaScript can respond immediately to keyboard shortcuts.
  host->host_contents()->GetView()->Focus();
  return dialog;
}

void ExtensionDialog::InitWindow(aura::Window* parent,
                                 int width,
                                 int height) {
  views::Widget* window = CreateBrowserModalDialogViews(this, parent);

  // Center the window over the browser.
  gfx::Point center = parent->GetBoundsInScreen().CenterPoint();
  int x = center.x() - width / 2;
  int y = center.y() - height / 2;
  // Ensure the top left and top right of the window are on screen, with
  // priority given to the top left.
  gfx::Rect screen_rect = gfx::Screen::GetScreenFor(parent)->
      GetDisplayNearestPoint(center).bounds();
  gfx::Rect bounds_rect = gfx::Rect(x, y, width, height);
  bounds_rect.AdjustToFit(screen_rect);
  window->SetBounds(bounds_rect);

  window->Show();
  // TODO(jamescook): Remove redundant call to Activate()?
  window->Activate();
}

void ExtensionDialog::ObserverDestroyed() {
  observer_ = NULL;
}

void ExtensionDialog::MaybeFocusRenderView() {
  views::FocusManager* focus_manager = GetWidget()->GetFocusManager();
  DCHECK(focus_manager != NULL);

  // Already there's a focused view, so no need to switch the focus.
  if (focus_manager->GetFocusedView())
    return;

  content::RenderWidgetHostView* view = host()->render_view_host()->GetView();
  if (!view)
    return;

  view->Focus();
}

/////////////////////////////////////////////////////////////////////////////
// views::DialogDelegate overrides.

int ExtensionDialog::GetDialogButtons() const {
  // The only user, SelectFileDialogExtension, provides its own buttons.
  return ui::DIALOG_BUTTON_NONE;
}

bool ExtensionDialog::CanResize() const {
  // Can resize only if minimum contents size set.
  return host_->view()->GetPreferredSize() != gfx::Size();
}

void ExtensionDialog::SetMinimumContentsSize(int width, int height) {
  host_->view()->SetPreferredSize(gfx::Size(width, height));
}

ui::ModalType ExtensionDialog::GetModalType() const {
  return ui::MODAL_TYPE_WINDOW;
}

bool ExtensionDialog::ShouldShowWindowTitle() const {
  return !window_title_.empty();
}

base::string16 ExtensionDialog::GetWindowTitle() const {
  return window_title_;
}

void ExtensionDialog::WindowClosing() {
  if (observer_)
    observer_->ExtensionDialogClosing(this);
}

void ExtensionDialog::DeleteDelegate() {
  // The window has finished closing.  Allow ourself to be deleted.
  Release();
}

views::Widget* ExtensionDialog::GetWidget() {
  return host_->view()->GetWidget();
}

const views::Widget* ExtensionDialog::GetWidget() const {
  return host_->view()->GetWidget();
}

views::View* ExtensionDialog::GetContentsView() {
  return host_->view();
}

bool ExtensionDialog::UseNewStyleForThisDialog() const {
  return false;
}

/////////////////////////////////////////////////////////////////////////////
// content::NotificationObserver overrides.

void ExtensionDialog::Observe(int type,
                             const content::NotificationSource& source,
                             const content::NotificationDetails& details) {
  switch (type) {
    case chrome::NOTIFICATION_EXTENSION_HOST_DID_STOP_LOADING:
      // Avoid potential overdraw by removing the temporary background after
      // the extension finishes loading.
      host_->view()->set_background(NULL);
      // The render view is created during the LoadURL(), so we should
      // set the focus to the view if nobody else takes the focus.
      if (content::Details<extensions::ExtensionHost>(host()) == details)
        MaybeFocusRenderView();
      break;
    case chrome::NOTIFICATION_EXTENSION_HOST_VIEW_SHOULD_CLOSE:
      // If we aren't the host of the popup, then disregard the notification.
      if (content::Details<extensions::ExtensionHost>(host()) != details)
        return;
      GetWidget()->Close();
      break;
    case chrome::NOTIFICATION_EXTENSION_PROCESS_TERMINATED:
      if (content::Details<extensions::ExtensionHost>(host()) != details)
        return;
      if (observer_)
        observer_->ExtensionTerminated(this);
      break;
    default:
      NOTREACHED() << L"Received unexpected notification";
      break;
  }
}