// 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/pdf/pdf_tab_helper.h"

#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/download/download_stats.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/omnibox/location_bar.h"
#include "chrome/browser/ui/pdf/open_pdf_in_reader_prompt_delegate.h"
#include "chrome/browser/ui/pdf/pdf_unsupported_feature.h"
#include "chrome/browser/ui/tab_contents/core_tab_helper.h"
#include "chrome/common/render_messages.h"
#include "content/public/browser/navigation_details.h"

#if defined(TOOLKIT_GTK)
#include "chrome/browser/ui/app_modal_dialogs/javascript_dialog_manager.h"
#include "content/public/browser/javascript_dialog_manager.h"
#endif

DEFINE_WEB_CONTENTS_USER_DATA_KEY(PDFTabHelper);

PDFTabHelper::PDFTabHelper(content::WebContents* web_contents)
    : content::WebContentsObserver(web_contents) {
}

PDFTabHelper::~PDFTabHelper() {
}

void PDFTabHelper::ShowOpenInReaderPrompt(
    scoped_ptr<OpenPDFInReaderPromptDelegate> prompt) {
  open_in_reader_prompt_ = prompt.Pass();
  UpdateLocationBar();
}

bool PDFTabHelper::OnMessageReceived(const IPC::Message& message) {
  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP(PDFTabHelper, message)
    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_PDFHasUnsupportedFeature,
                        OnHasUnsupportedFeature)
    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_PDFSaveURLAs, OnSaveURLAs)
    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_PDFUpdateContentRestrictions,
                        OnUpdateContentRestrictions)
    IPC_MESSAGE_HANDLER_DELAY_REPLY(ChromeViewHostMsg_PDFModalPromptForPassword,
                                    OnModalPromptForPassword)
    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP()
  return handled;
}

void PDFTabHelper::DidNavigateMainFrame(
    const content::LoadCommittedDetails& details,
    const content::FrameNavigateParams& params) {
  if (open_in_reader_prompt_.get() &&
      open_in_reader_prompt_->ShouldExpire(details)) {
    open_in_reader_prompt_.reset();
    UpdateLocationBar();
  }
}

void PDFTabHelper::UpdateLocationBar() {
  Browser* browser = chrome::FindBrowserWithWebContents(web_contents());
  if (!browser)
    return;

  BrowserWindow* window = browser->window();
  if (!window)
    return;

  LocationBar* location_bar = window->GetLocationBar();
  if (!location_bar)
    return;

  location_bar->UpdateOpenPDFInReaderPrompt();
}

void PDFTabHelper::OnHasUnsupportedFeature() {
  PDFHasUnsupportedFeature(web_contents());
}

void PDFTabHelper::OnSaveURLAs(const GURL& url,
                               const content::Referrer& referrer) {
  RecordDownloadSource(DOWNLOAD_INITIATED_BY_PDF_SAVE);
  web_contents()->SaveFrame(url, referrer);
}

void PDFTabHelper::OnUpdateContentRestrictions(int content_restrictions) {
  CoreTabHelper* core_tab_helper =
      CoreTabHelper::FromWebContents(web_contents());
  core_tab_helper->UpdateContentRestrictions(content_restrictions);
}

void PDFTabHelper::OnModalPromptForPasswordClosed(
    IPC::Message* reply_message,
    bool success,
    const string16& actual_value) {
  ChromeViewHostMsg_PDFModalPromptForPassword::WriteReplyParams(
      reply_message, UTF16ToUTF8(actual_value));
  Send(reply_message);
}

void PDFTabHelper::OnModalPromptForPassword(const std::string& prompt,
                                            IPC::Message* reply_message) {
  base::Callback<void(bool, const string16&)> callback =
      base::Bind(&PDFTabHelper::OnModalPromptForPasswordClosed,
                 base::Unretained(this), reply_message);
#if !defined(TOOLKIT_GTK)
  ShowPDFPasswordDialog(web_contents(), base::UTF8ToUTF16(prompt), callback);
#else
  // GTK is going away, so it's not worth the effort to create a password dialog
  // for it. Cheat (for now) until the GTK code is removed.
  bool did_suppress_message;
  GetJavaScriptDialogManagerInstance()->RunJavaScriptDialog(
      web_contents(),
      GURL(),
      std::string(),
      content::JAVASCRIPT_MESSAGE_TYPE_PROMPT,
      base::UTF8ToUTF16(prompt),
      base::string16(),
      callback,
      &did_suppress_message);
#endif  // TOOLKIT_GTK
}