// Copyright (c) 2011 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/repost_form_warning_controller.h"

#include "chrome/browser/ui/constrained_window.h"
#include "content/browser/tab_contents/tab_contents.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/notification_types.h"

RepostFormWarningController::RepostFormWarningController(
    TabContents* tab_contents)
    : tab_contents_(tab_contents),
      window_(NULL) {
  NavigationController* controller = &tab_contents->controller();
  registrar_.Add(this, content::NOTIFICATION_LOAD_START,
                 content::Source<NavigationController>(controller));
  registrar_.Add(this, content::NOTIFICATION_TAB_CLOSING,
                 content::Source<NavigationController>(controller));
  registrar_.Add(this, content::NOTIFICATION_REPOST_WARNING_SHOWN,
                 content::Source<NavigationController>(controller));
}

RepostFormWarningController::~RepostFormWarningController() {
  // If we end up here, the constrained window has been closed, so make sure we
  // don't close it again.
  window_ = NULL;
  // Make sure everything is cleaned up.
  Cancel();
}

void RepostFormWarningController::Cancel() {
  if (tab_contents_) {
    tab_contents_->controller().CancelPendingReload();
    CloseDialog();
  }
}

void RepostFormWarningController::Continue() {
  if (tab_contents_) {
    tab_contents_->controller().ContinuePendingReload();
    // If we reload the page, the dialog will be closed anyway.
  }
}

void RepostFormWarningController::Observe(int type,
                                const content::NotificationSource& source,
                                const content::NotificationDetails& details) {
  // Close the dialog if we load a page (because reloading might not apply to
  // the same page anymore) or if the tab is closed, because then we won't have
  // a navigation controller anymore.
  if (tab_contents_ &&
      (type == content::NOTIFICATION_LOAD_START ||
       type == content::NOTIFICATION_TAB_CLOSING ||
       type == content::NOTIFICATION_REPOST_WARNING_SHOWN)) {
    DCHECK_EQ(content::Source<NavigationController>(source).ptr(),
              &tab_contents_->controller());
    Cancel();
  }
}

void RepostFormWarningController::CloseDialog() {
  // Make sure we won't do anything when |Cancel()| is called again.
  tab_contents_ = NULL;
  if (window_) {
    window_->CloseConstrainedWindow();
  }
}