chrome/renderer/resources/extensions/page_capture_custom_bindings.js

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Custom binding for the pageCapture API.
   6
   7 var binding = require('binding').Binding.create('pageCapture');
   8
   9 var handleUncaughtException = require('uncaught_exception_handler').handle;
  10 var pageCaptureNatives = requireNative('page_capture');
  11 var CreateBlob = pageCaptureNatives.CreateBlob;
  12 var SendResponseAck = pageCaptureNatives.SendResponseAck;
  13
  14 binding.registerCustomHook(function(bindingsAPI) {
  15   var apiFunctions = bindingsAPI.apiFunctions;
  16
  17   apiFunctions.setCustomCallback('saveAsMHTML',
  18                                  function(name, request, response) {
  19     var callback = request.callback;
  20     request.callback = null;
  21     if (response)
  22       response = CreateBlob(response.mhtmlFilePath, response.mhtmlFileLength);
  23
  24     try {
  25       callback(response);
  26     } catch (e) {
  27       handleUncaughtException(
  28           'Error in chrome.pageCapture.saveAsMHTML callback', e, request.stack);
  29     } finally {
  30       // Notify the browser. Now that the blob is referenced from JavaScript,
  31       // the browser can drop its reference to it.
  32       SendResponseAck(request.id);
  33     }
  34   });
  35 });
  36
  37 exports.binding = binding.generate();