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      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 function moduleDidLoad() {
      6   common.hideModule();
      7 }
      8 
      9 // Called by the common.js module.
     10 function domContentLoaded(name, tc, config, width, height) {
     11   navigator.webkitPersistentStorage.requestQuota(1024 * 1024,
     12     function(bytes) {
     13       common.updateStatus(
     14           'Allocated ' + bytes + ' bytes of persistant storage.');
     15       common.attachDefaultListeners();
     16       common.createNaClModule(name, tc, config, width, height);
     17     },
     18     function(e) { alert('Failed to allocate space') });
     19 }
     20 
     21 // Called by the common.js module.
     22 function attachListeners() {
     23   var radioEls = document.querySelectorAll('input[type="radio"]');
     24   for (var i = 0; i < radioEls.length; ++i) {
     25     radioEls[i].addEventListener('click', onRadioClicked);
     26   }
     27 
     28   function addEventListenerToButton(parentId, func) {
     29     document.querySelector('#' + parentId + ' button')
     30         .addEventListener('click', func);
     31   }
     32 
     33   addEventListenerToButton('saveFile', saveFile);
     34   addEventListenerToButton('loadFile', loadFile);
     35   addEventListenerToButton('delete', deleteFileOrDirectory);
     36   addEventListenerToButton('listDir', listDir);
     37   addEventListenerToButton('makeDir', makeDir);
     38 }
     39 
     40 function onRadioClicked(e) {
     41   var divId = this.id.slice(6);  // skip "radio_"
     42   var functionEls = document.querySelectorAll('.function');
     43   for (var i = 0; i < functionEls.length; ++i) {
     44     var visible = functionEls[i].id === divId;
     45     if (functionEls[i].id === divId)
     46       functionEls[i].removeAttribute('hidden');
     47     else
     48       functionEls[i].setAttribute('hidden', '');
     49   }
     50 }
     51 
     52 function makeMessage(command, path) {
     53   // Package a message using a simple protocol containing:
     54   // command <path length> <path> <space-separated extra args>
     55   var msg = command;
     56   msg += ' ';
     57   msg += path.length;
     58   msg += ' ';
     59   msg += path;
     60   // Maybe add extra args
     61   for (var i = 2; i < arguments.length; ++i) {
     62     msg += ' ' + arguments[i];
     63   }
     64   return msg;
     65 }
     66 
     67 function saveFile() {
     68   if (common.naclModule) {
     69     var fileName = document.querySelector('#saveFile input').value;
     70     var fileText = document.querySelector('#saveFile textarea').value;
     71     common.naclModule.postMessage(makeMessage('sv', fileName, fileText));
     72     // clear the editor.
     73     fileText.value = '';
     74   }
     75 }
     76 
     77 function loadFile() {
     78   if (common.naclModule) {
     79     var fileName = document.querySelector('#loadFile input').value;
     80     // clear the editor first (in case there is an error and there is no
     81     // output).
     82     document.querySelector('#loadFile textarea').value = '';
     83     common.naclModule.postMessage(makeMessage('ld', fileName));
     84   }
     85 }
     86 
     87 function deleteFileOrDirectory() {
     88   if (common.naclModule) {
     89     var fileName = document.querySelector('#delete input').value;
     90     common.naclModule.postMessage(makeMessage('de', fileName));
     91   }
     92 }
     93 
     94 function listDir() {
     95   if (common.naclModule) {
     96     var dirName = document.querySelector('#listDir input').value;
     97     common.naclModule.postMessage(makeMessage('ls', dirName));
     98   }
     99 }
    100 
    101 function makeDir() {
    102   if (common.naclModule) {
    103     var dirName = document.querySelector('#makeDir input').value;
    104     common.naclModule.postMessage(makeMessage('md', dirName));
    105   }
    106 }
    107 
    108 // Called by the common.js module.
    109 function handleMessage(message_event) {
    110   var msg = message_event.data;
    111   var parts = msg.split('|');
    112   var command = parts[0];
    113   var args = parts.slice(1);
    114 
    115   if (command == 'ERR') {
    116     common.logMessage('Error: ' + args[0]);
    117   } else if (command == 'STAT') {
    118     common.logMessage(args[0]);
    119   } else if (command == 'READY') {
    120     common.logMessage('Filesystem ready!');
    121   } else if (command == 'DISP') {
    122     // Find the file editor that is currently visible.
    123     var fileEditorEl =
    124         document.querySelector('.function:not([hidden]) > textarea');
    125     // Rejoin args with pipe (|) -- there is only one argument, and it can
    126     // contain the pipe character.
    127     fileEditorEl.value = args.join('|');
    128   } else if (command == 'LIST') {
    129     var listDirOutputEl = document.getElementById('listDirOutput');
    130 
    131     // NOTE: files with | in their names will be incorrectly split. Fixing this
    132     // is left as an exercise for the reader.
    133 
    134     // Remove all children of this element...
    135     while (listDirOutputEl.firstChild) {
    136       listDirOutputEl.removeChild(listDirOutputEl.firstChild);
    137     }
    138 
    139     if (args.length) {
    140       // Add new <li> elements for each file.
    141       for (var i = 0; i < args.length; ++i) {
    142         var itemEl = document.createElement('li');
    143         itemEl.textContent = args[i];
    144         listDirOutputEl.appendChild(itemEl);
    145       }
    146     } else {
    147       var itemEl = document.createElement('li');
    148       itemEl.textContent = '<empty directory>';
    149       listDirOutputEl.appendChild(itemEl);
    150     }
    151   }
    152 }
    153