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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
|
/* -*- indent-tabs-mode: nil; js-indent-level: 2; js-indent-level: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
/**
* This module contains a small element attribute value parser. It's primary
* goal is to extract link information from attribute values (like the href in
* <a href="/some/link.html"> for example).
*
* There are several types of linkable attribute values:
* - TYPE_URI: a URI (e.g. <a href="uri">).
* - TYPE_URI_LIST: a space separated list of URIs (e.g. <a ping="uri1 uri2">).
* - TYPE_IDREF: a reference to an other element in the same document via its id
* (e.g. <label for="input-id"> or <key command="command-id">).
* - TYPE_IDREF_LIST: a space separated list of IDREFs (e.g.
* <output for="id1 id2">).
* - TYPE_JS_RESOURCE_URI: a URI to a javascript resource that can be opened in
* the devtools (e.g. <script src="uri">).
* - TYPE_CSS_RESOURCE_URI: a URI to a css resource that can be opened in the
* devtools (e.g. <link href="uri">).
*
* parseAttribute is the parser entry function, exported on this module.
*/
const TYPE_STRING = "string";
const TYPE_URI = "uri";
const TYPE_URI_LIST = "uriList";
const TYPE_IDREF = "idref";
const TYPE_IDREF_LIST = "idrefList";
const TYPE_JS_RESOURCE_URI = "jsresource";
const TYPE_CSS_RESOURCE_URI = "cssresource";
const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
const HTML_NS = "http://www.w3.org/1999/xhtml";
/* eslint-disable max-len */
const ATTRIBUTE_TYPES = [
{namespaceURI: HTML_NS, attributeName: "action", tagName: "form", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "background", tagName: "body", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "cite", tagName: "blockquote", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "cite", tagName: "q", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "cite", tagName: "del", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "cite", tagName: "ins", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "classid", tagName: "object", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "codebase", tagName: "object", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "codebase", tagName: "applet", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "command", tagName: "menuitem", type: TYPE_IDREF},
{namespaceURI: "*", attributeName: "contextmenu", tagName: "*", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "data", tagName: "object", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "for", tagName: "label", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "for", tagName: "output", type: TYPE_IDREF_LIST},
{namespaceURI: HTML_NS, attributeName: "form", tagName: "button", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "form", tagName: "fieldset", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "form", tagName: "input", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "form", tagName: "keygen", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "form", tagName: "label", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "form", tagName: "object", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "form", tagName: "output", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "form", tagName: "select", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "form", tagName: "textarea", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "formaction", tagName: "button", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "formaction", tagName: "input", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "headers", tagName: "td", type: TYPE_IDREF_LIST},
{namespaceURI: HTML_NS, attributeName: "headers", tagName: "th", type: TYPE_IDREF_LIST},
{namespaceURI: HTML_NS, attributeName: "href", tagName: "a", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "href", tagName: "area", type: TYPE_URI},
{namespaceURI: "*", attributeName: "href", tagName: "link", type: TYPE_CSS_RESOURCE_URI,
/* eslint-enable */
isValid: (namespaceURI, tagName, attributes) => {
return getAttribute(attributes, "rel") === "stylesheet";
}},
/* eslint-disable max-len */
{namespaceURI: "*", attributeName: "href", tagName: "link", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "href", tagName: "base", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "icon", tagName: "menuitem", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "list", tagName: "input", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "longdesc", tagName: "img", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "longdesc", tagName: "frame", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "longdesc", tagName: "iframe", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "manifest", tagName: "html", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "menu", tagName: "button", type: TYPE_IDREF},
{namespaceURI: HTML_NS, attributeName: "ping", tagName: "a", type: TYPE_URI_LIST},
{namespaceURI: HTML_NS, attributeName: "ping", tagName: "area", type: TYPE_URI_LIST},
{namespaceURI: HTML_NS, attributeName: "poster", tagName: "video", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "profile", tagName: "head", type: TYPE_URI},
{namespaceURI: "*", attributeName: "src", tagName: "script", type: TYPE_JS_RESOURCE_URI},
{namespaceURI: HTML_NS, attributeName: "src", tagName: "input", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "src", tagName: "frame", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "src", tagName: "iframe", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "src", tagName: "img", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "src", tagName: "audio", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "src", tagName: "embed", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "src", tagName: "source", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "src", tagName: "track", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "src", tagName: "video", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "usemap", tagName: "img", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "usemap", tagName: "input", type: TYPE_URI},
{namespaceURI: HTML_NS, attributeName: "usemap", tagName: "object", type: TYPE_URI},
{namespaceURI: "*", attributeName: "xmlns", tagName: "*", type: TYPE_URI},
{namespaceURI: XUL_NS, attributeName: "command", tagName: "key", type: TYPE_IDREF},
{namespaceURI: XUL_NS, attributeName: "containment", tagName: "*", type: TYPE_URI},
{namespaceURI: XUL_NS, attributeName: "context", tagName: "*", type: TYPE_IDREF},
{namespaceURI: XUL_NS, attributeName: "datasources", tagName: "*", type: TYPE_URI_LIST},
{namespaceURI: XUL_NS, attributeName: "insertafter", tagName: "*", type: TYPE_IDREF},
{namespaceURI: XUL_NS, attributeName: "insertbefore", tagName: "*", type: TYPE_IDREF},
{namespaceURI: XUL_NS, attributeName: "menu", tagName: "*", type: TYPE_IDREF},
{namespaceURI: XUL_NS, attributeName: "observes", tagName: "*", type: TYPE_IDREF},
{namespaceURI: XUL_NS, attributeName: "popup", tagName: "*", type: TYPE_IDREF},
{namespaceURI: XUL_NS, attributeName: "ref", tagName: "*", type: TYPE_URI},
{namespaceURI: XUL_NS, attributeName: "removeelement", tagName: "*", type: TYPE_IDREF},
{namespaceURI: XUL_NS, attributeName: "sortResource", tagName: "*", type: TYPE_URI},
{namespaceURI: XUL_NS, attributeName: "sortResource2", tagName: "*", type: TYPE_URI},
{namespaceURI: XUL_NS, attributeName: "src", tagName: "stringbundle", type: TYPE_URI},
{namespaceURI: XUL_NS, attributeName: "template", tagName: "*", type: TYPE_IDREF},
{namespaceURI: XUL_NS, attributeName: "tooltip", tagName: "*", type: TYPE_IDREF},
/* eslint-enable */
// SVG links aren't handled yet, see bug 1158831.
// {namespaceURI: SVG_NS, attributeName: "fill", tagName: "*", type: },
// {namespaceURI: SVG_NS, attributeName: "stroke", tagName: "*", type: },
// {namespaceURI: SVG_NS, attributeName: "markerstart", tagName: "*", type: },
// {namespaceURI: SVG_NS, attributeName: "markermid", tagName: "*", type: },
// {namespaceURI: SVG_NS, attributeName: "markerend", tagName: "*", type: },
// {namespaceURI: SVG_NS, attributeName: "xlink:href", tagName: "*", type: }
];
var parsers = {
[TYPE_URI]: function (attributeValue) {
return [{
type: TYPE_URI,
value: attributeValue
}];
},
[TYPE_URI_LIST]: function (attributeValue) {
let data = splitBy(attributeValue, " ");
for (let token of data) {
if (!token.type) {
token.type = TYPE_URI;
}
}
return data;
},
[TYPE_JS_RESOURCE_URI]: function (attributeValue) {
return [{
type: TYPE_JS_RESOURCE_URI,
value: attributeValue
}];
},
[TYPE_CSS_RESOURCE_URI]: function (attributeValue) {
return [{
type: TYPE_CSS_RESOURCE_URI,
value: attributeValue
}];
},
[TYPE_IDREF]: function (attributeValue) {
return [{
type: TYPE_IDREF,
value: attributeValue
}];
},
[TYPE_IDREF_LIST]: function (attributeValue) {
let data = splitBy(attributeValue, " ");
for (let token of data) {
if (!token.type) {
token.type = TYPE_IDREF;
}
}
return data;
}
};
/**
* Parse an attribute value.
* @param {String} namespaceURI The namespaceURI of the node that has the
* attribute.
* @param {String} tagName The tagName of the node that has the attribute.
* @param {Array} attributes The list of all attributes of the node. This should
* be an array of {name, value} objects.
* @param {String} attributeName The name of the attribute to parse.
* @return {Array} An array of tokens that represents the value. Each token is
* an object {type: [string|uri|jsresource|cssresource|idref], value}.
* For instance parsing the ping attribute in <a ping="uri1 uri2"> returns:
* [
* {type: "uri", value: "uri2"},
* {type: "string", value: " "},
* {type: "uri", value: "uri1"}
* ]
*/
function parseAttribute(namespaceURI, tagName, attributes, attributeName) {
if (!hasAttribute(attributes, attributeName)) {
throw new Error(`Attribute ${attributeName} isn't part of the ` +
"provided attributes");
}
let type = getType(namespaceURI, tagName, attributes, attributeName);
if (!type) {
return [{
type: TYPE_STRING,
value: getAttribute(attributes, attributeName)
}];
}
return parsers[type](getAttribute(attributes, attributeName));
}
/**
* Get the type for links in this attribute if any.
* @param {String} namespaceURI The node's namespaceURI.
* @param {String} tagName The node's tagName.
* @param {Array} attributes The node's attributes, as a list of {name, value}
* objects.
* @param {String} attributeName The name of the attribute to get the type for.
* @return {Object} null if no type exist for this attribute on this node, the
* type object otherwise.
*/
function getType(namespaceURI, tagName, attributes, attributeName) {
for (let typeData of ATTRIBUTE_TYPES) {
let containsAttribute = attributeName === typeData.attributeName ||
typeData.attributeName === "*";
let hasNamespace = namespaceURI === typeData.namespaceURI ||
typeData.namespaceURI === "*";
let hasTagName = tagName.toLowerCase() === typeData.tagName ||
typeData.tagName === "*";
let isValid = typeData.isValid
? typeData.isValid(namespaceURI,
tagName,
attributes,
attributeName)
: true;
if (containsAttribute && hasNamespace && hasTagName && isValid) {
return typeData.type;
}
}
return null;
}
function getAttribute(attributes, attributeName) {
for (let {name, value} of attributes) {
if (name === attributeName) {
return value;
}
}
return null;
}
function hasAttribute(attributes, attributeName) {
for (let {name} of attributes) {
if (name === attributeName) {
return true;
}
}
return false;
}
/**
* Split a string by a given character and return an array of objects parts.
* The array will contain objects for the split character too, marked with
* TYPE_STRING type.
* @param {String} value The string to parse.
* @param {String} splitChar A 1 length split character.
* @return {Array}
*/
function splitBy(value, splitChar) {
let data = [], i = 0, buffer = "";
while (i <= value.length) {
if (i === value.length && buffer) {
data.push({value: buffer});
}
if (value[i] === splitChar) {
if (buffer) {
data.push({value: buffer});
}
data.push({
type: TYPE_STRING,
value: splitChar
});
buffer = "";
} else {
buffer += value[i];
}
i++;
}
return data;
}
exports.parseAttribute = parseAttribute;
// Exported for testing only.
exports.splitBy = splitBy;
|
