native_client_sdk/src/examples/api/var_array_buffer/example.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 // Called by the common.js module.
   6 function attachListeners() {
   7   document.getElementById('fileInput').addEventListener('change',
   8       handleFileInput);
   9   document.getElementById('listener').addEventListener('drop',
  10       handleFileDrop, true);
  11 }
  12
  13 function postFileContents(file) {
  14   var reader = new FileReader();
  15   reader.onload = function(load_event) {
  16     if (common.naclModule)
  17       common.naclModule.postMessage(load_event.target.result);
  18   }
  19   reader.readAsArrayBuffer(file);
  20 }
  21
  22 // Handle a file being dropped on to the plugin's rectangle.
  23 function handleFileDrop(dropEvent) {
  24   if (!dropEvent.dataTransfer || !dropEvent.dataTransfer.files)
  25     return;
  26   dropEvent.stopPropagation();
  27   dropEvent.preventDefault();
  28   var files = dropEvent.dataTransfer.files;
  29   for(var i = 0; i < files.length; ++i)
  30     postFileContents(files[i]);
  31 }
  32
  33 // Handle a file being chosen from the <input type=file...> tag.
  34 function handleFileInput() {
  35   var file_input = document.getElementById("fileInput");
  36   var files = file_input.files;
  37   for(var i = 0; i < files.length; ++i)
  38     postFileContents(files[i]);
  39 }