1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
// 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.
function moduleDidLoad() {
common.hideModule();
}
// Called by the common.js module.
function domContentLoaded(name, tc, config, width, height) {
window.webkitStorageInfo.requestQuota(window.PERSISTENT, 1024*1024,
function(bytes) {
common.updateStatus(
'Allocated '+bytes+' bytes of persistant storage.');
common.createNaClModule(name, tc, config, width, height);
common.attachDefaultListeners();
},
function(e) { alert('Failed to allocate space') });
}
// Called by the common.js module.
function attachListeners() {
var radioEls = document.querySelectorAll('input[type="radio"]');
for (var i = 0; i < radioEls.length; ++i) {
radioEls[i].addEventListener('click', onRadioClicked);
}
document.getElementById('fopenExecute').addEventListener('click', fopen);
document.getElementById('fcloseExecute').addEventListener('click', fclose);
document.getElementById('freadExecute').addEventListener('click', fread);
document.getElementById('fwriteExecute').addEventListener('click', fwrite);
document.getElementById('fseekExecute').addEventListener('click', fseek);
}
function onRadioClicked(e) {
var divId = this.id.slice(5); // skip "radio"
var functionEls = document.querySelectorAll('.function');
for (var i = 0; i < functionEls.length; ++i) {
var visible = functionEls[i].id === divId;
if (functionEls[i].id === divId)
functionEls[i].removeAttribute('hidden');
else
functionEls[i].setAttribute('hidden');
}
}
function addFilenameToSelectElements(filehandle, filename) {
var text = '[' + filehandle + '] ' + filename;
var selectEls = document.querySelectorAll('select.file-handle');
for (var i = 0; i < selectEls.length; ++i) {
var optionEl = document.createElement('option');
optionEl.setAttribute('value', filehandle);
optionEl.appendChild(document.createTextNode(text));
selectEls[i].appendChild(optionEl);
}
}
function removeFilenameFromSelectElements(filehandle) {
var optionEls = document.querySelectorAll('select.file-handle > option');
for (var i = 0; i < optionEls.length; ++i) {
var optionEl = optionEls[i];
if (optionEl.value == filehandle) {
var selectEl = optionEl.parentNode;
selectEl.removeChild(optionEl);
}
}
}
var filehandle_map = {};
function fopen(e) {
var filename = document.getElementById('fopenFilename').value;
var access = document.getElementById('fopenMode').value;
nacl_module.postMessage(makeCall('fopen', filename, access));
}
function fopen_result(filename, filehandle) {
filehandle_map[filehandle] = filename;
addFilenameToSelectElements(filehandle, filename)
logMessage('File ' + filename + ' opened successfully.');
}
function fclose(e) {
var filehandle = document.getElementById('fcloseHandle').value;
nacl_module.postMessage(makeCall('fclose', filehandle));
}
function fclose_result(filehandle) {
var filename = filehandle_map[filehandle];
removeFilenameFromSelectElements(filehandle, filename);
logMessage('File ' + filename + ' closed successfully.');
}
function fread(e) {
var filehandle = document.getElementById('freadHandle').value;
var numBytes = document.getElementById('freadBytes').value;
nacl_module.postMessage(makeCall('fread', filehandle, numBytes));
}
function fread_result(filehandle, data) {
var filename = filehandle_map[filehandle];
logMessage('Read "' + data + '" from file ' + filename + '.');
}
function fwrite(e) {
var filehandle = document.getElementById('fwriteHandle').value;
var data = document.getElementById('fwriteData').value;
nacl_module.postMessage(makeCall('fwrite', filehandle, data));
}
function fwrite_result(filehandle, bytes_written) {
var filename = filehandle_map[filehandle];
logMessage('Wrote ' + bytes_written + ' bytes to file ' + filename + '.');
}
function fseek(e) {
var filehandle = document.getElementById('fseekHandle').value;
var offset = document.getElementById('fseekOffset').value;
var whence = document.getElementById('fseekWhence').value;
nacl_module.postMessage(makeCall('fseek', filehandle, offset, whence));
}
function fseek_result(filehandle, filepos) {
var filename = filehandle_map[filehandle];
logMessage('Seeked to location ' + filepos + ' in file ' + filename + '.');
}
/**
* Return true when |s| starts with the string |prefix|.
*
* @param {string} s The string to search.
* @param {string} prefix The prefix to search for in |s|.
*/
function startsWith(s, prefix) {
// indexOf would search the entire string, lastIndexOf(p, 0) only checks at
// the first index. See: http://stackoverflow.com/a/4579228
return s.lastIndexOf(prefix, 0) === 0;
}
function logMessage(msg) {
var logEl = document.getElementById('log');
logEl.innerHTML += msg + '<br>';
}
function makeCall(func) {
var message = func;
for (var i = 1; i < arguments.length; ++i) {
message += '\1' + arguments[i];
}
return message;
}
// Called by the common.js module.
function handleMessage(message_event) {
var msg = message_event.data;
if (startsWith(msg, 'Error:')) {
logMessage(msg);
} else {
// Result from a function call.
var params = msg.split('\1');
var func_name = params[0];
var func_result_name = func_name + '_result';
var result_func = window[func_result_name];
if (!result_func) {
logMessage('Error: Bad message received from NaCl module.');
return;
}
result_func.apply(null, params.slice(1));
}
}
|
