// Copyright (c) 2006-2008 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/views/html_dialog_view.h"

#include "base/keyboard_codes.h"
#include "chrome/browser/browser.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "views/widget/root_view.h"
#include "views/widget/widget.h"
#include "views/window/window.h"

namespace browser {

// Declared in browser_dialogs.h so that others don't need to depend on our .h.
void ShowHtmlDialogView(gfx::NativeWindow parent, Browser* browser,
                        HtmlDialogUIDelegate* delegate) {
  HtmlDialogView* html_view =
      new HtmlDialogView(browser->profile(), delegate);
  views::Window::CreateChromeWindow(parent, gfx::Rect(), html_view);
  html_view->InitDialog();
  html_view->window()->Show();
}

}  // namespace browser

////////////////////////////////////////////////////////////////////////////////
// HtmlDialogView, public:

HtmlDialogView::HtmlDialogView(Profile* profile,
                               HtmlDialogUIDelegate* delegate)
    : DOMView(),
      HtmlDialogTabContentsDelegate(profile),
      delegate_(delegate) {
}

HtmlDialogView::~HtmlDialogView() {
}

////////////////////////////////////////////////////////////////////////////////
// HtmlDialogView, views::View implementation:

gfx::Size HtmlDialogView::GetPreferredSize() {
  gfx::Size out;
  if (delegate_)
    delegate_->GetDialogSize(&out);
  return out;
}

bool HtmlDialogView::AcceleratorPressed(const views::Accelerator& accelerator) {
  // Pressing ESC closes the dialog.
  DCHECK_EQ(base::VKEY_ESCAPE, accelerator.GetKeyCode());
  OnDialogClosed(std::string());
  return true;
}

////////////////////////////////////////////////////////////////////////////////
// HtmlDialogView, views::WindowDelegate implementation:

bool HtmlDialogView::CanResize() const {
  return true;
}

bool HtmlDialogView::IsModal() const {
  if (delegate_)
    return delegate_->IsDialogModal();
  else
    return false;
}

std::wstring HtmlDialogView::GetWindowTitle() const {
  if (delegate_)
    return delegate_->GetDialogTitle();
  else
    return std::wstring();
}

void HtmlDialogView::WindowClosing() {
  // If we still have a delegate that means we haven't notified it of the
  // dialog closing. This happens if the user clicks the Close button on the
  // dialog.
  if (delegate_)
    OnDialogClosed("");
}

views::View* HtmlDialogView::GetContentsView() {
  return this;
}

views::View* HtmlDialogView::GetInitiallyFocusedView() {
  return this;
}

////////////////////////////////////////////////////////////////////////////////
// HtmlDialogUIDelegate implementation:

bool HtmlDialogView::IsDialogModal() const {
  return IsModal();
}

std::wstring HtmlDialogView::GetDialogTitle() const {
  return GetWindowTitle();
}

GURL HtmlDialogView::GetDialogContentURL() const {
  if (delegate_)
    return delegate_->GetDialogContentURL();
  else
    return GURL();
}

void HtmlDialogView::GetDOMMessageHandlers(
    std::vector<DOMMessageHandler*>* handlers) const {
  if (delegate_)
    delegate_->GetDOMMessageHandlers(handlers);
}

void HtmlDialogView::GetDialogSize(gfx::Size* size) const {
  if (delegate_)
    delegate_->GetDialogSize(size);
}

std::string HtmlDialogView::GetDialogArgs() const {
  if (delegate_)
    return delegate_->GetDialogArgs();
  else
    return std::string();
}

void HtmlDialogView::OnDialogClosed(const std::string& json_retval) {
  HtmlDialogUIDelegate* dialog_delegate = delegate_;
  delegate_ = NULL;  // We will not communicate further with the delegate.
  HtmlDialogTabContentsDelegate::Detach();
  dialog_delegate->OnDialogClosed(json_retval);
  window()->Close();
}

////////////////////////////////////////////////////////////////////////////////
// TabContentsDelegate implementation:

void HtmlDialogView::MoveContents(TabContents* source, const gfx::Rect& pos) {
  // The contained web page wishes to resize itself. We let it do this because
  // if it's a dialog we know about, we trust it not to be mean to the user.
  GetWidget()->SetBounds(pos);
}

void HtmlDialogView::ToolbarSizeChanged(TabContents* source,
                                        bool is_animating) {
  Layout();
}

// A simplified version of BrowserView::HandleKeyboardEvent().
// We don't handle global keyboard shortcuts here, but that's fine since
// they're all browser-specific. (This may change in the future.)
void HtmlDialogView::HandleKeyboardEvent(const NativeWebKeyboardEvent& event) {
#if defined(OS_WIN)
  // Any unhandled keyboard/character messages should be defproced.
  // This allows stuff like F10, etc to work correctly.
  DefWindowProc(event.os_event.hwnd, event.os_event.message,
                  event.os_event.wParam, event.os_event.lParam);
#endif
}

////////////////////////////////////////////////////////////////////////////////
// HtmlDialogView:

void HtmlDialogView::InitDialog() {
  // Now Init the DOMView. This view runs in its own process to render the html.
  DOMView::Init(profile(), NULL);

  tab_contents_->set_delegate(this);

  // Set the delegate. This must be done before loading the page. See
  // the comment above HtmlDialogUI in its header file for why.
  HtmlDialogUI::GetPropertyAccessor().SetProperty(tab_contents_->property_bag(),
                                                  this);

  // Pressing the ESC key will close the dialog.
  AddAccelerator(views::Accelerator(base::VKEY_ESCAPE, false, false, false));

  DOMView::LoadURL(GetDialogContentURL());
}