]>
Commit | Line | Data |
---|---|---|
2207d356 | 1 | /** |
55cb43d7 | 2 | * @license MIT |
2207d356 | 3 | */ |
55cb43d7 | 4 | |
6198556e | 5 | import { LinkMatcherOptions } from './Interfaces'; |
7ac4f1a9 | 6 | import { LinkMatcher, LinkMatcherHandler, LinkMatcherValidationCallback } from './Types'; |
6198556e DI |
7 | |
8 | const INVALID_LINK_CLASS = 'xterm-invalid-link'; | |
2207d356 | 9 | |
2207d356 DI |
10 | const protocolClause = '(https?:\\/\\/)'; |
11 | const domainCharacterSet = '[\\da-z\\.-]+'; | |
12 | const negatedDomainCharacterSet = '[^\\da-z\\.-]+'; | |
13 | const domainBodyClause = '(' + domainCharacterSet + ')'; | |
14 | const tldClause = '([a-z\\.]{2,6})'; | |
15 | const ipClause = '((\\d{1,3}\\.){3}\\d{1,3})'; | |
28d4ec77 | 16 | const localHostClause = '(localhost)'; |
2207d356 | 17 | const portClause = '(:\\d{1,5})'; |
28d4ec77 | 18 | const hostClause = '((' + domainBodyClause + '\\.' + tldClause + ')|' + ipClause + '|' + localHostClause + ')' + portClause + '?'; |
b68180b9 DI |
19 | const pathClause = '(\\/[\\/\\w\\.\\-%~]*)*'; |
20 | const queryStringHashFragmentCharacterSet = '[0-9\\w\\[\\]\\(\\)\\/\\?\\!#@$%&\'*+,:;~\\=\\.\\-]*'; | |
9aae4396 DI |
21 | const queryStringClause = '(\\?' + queryStringHashFragmentCharacterSet + ')?'; |
22 | const hashFragmentClause = '(#' + queryStringHashFragmentCharacterSet + ')?'; | |
7279ee0f | 23 | const negatedPathCharacterSet = '[^\\/\\w\\.\\-%]+'; |
9aae4396 | 24 | const bodyClause = hostClause + pathClause + queryStringClause + hashFragmentClause; |
2207d356 DI |
25 | const start = '(?:^|' + negatedDomainCharacterSet + ')('; |
26 | const end = ')($|' + negatedPathCharacterSet + ')'; | |
f7bc0fba | 27 | const strictUrlRegex = new RegExp(start + protocolClause + bodyClause + end); |
2207d356 | 28 | |
55cb43d7 DI |
29 | /** |
30 | * The ID of the built in http(s) link matcher. | |
31 | */ | |
7167b06b DI |
32 | const HYPERTEXT_LINK_MATCHER_ID = 0; |
33 | ||
f7bc0fba DI |
34 | /** |
35 | * The Linkifier applies links to rows shortly after they have been refreshed. | |
36 | */ | |
2207d356 | 37 | export class Linkifier { |
15d79143 DI |
38 | /** |
39 | * The time to wait after a row is changed before it is linkified. This prevents | |
40 | * the costly operation of searching every row multiple times, pntentially a | |
41 | * huge aount of times. | |
42 | */ | |
43 | protected static TIME_BEFORE_LINKIFY = 200; | |
44 | ||
7ac4f1a9 DI |
45 | protected _linkMatchers: LinkMatcher[]; |
46 | ||
26ebc3d9 | 47 | private _document: Document; |
2207d356 DI |
48 | private _rows: HTMLElement[]; |
49 | private _rowTimeoutIds: number[]; | |
5183332f | 50 | private _nextLinkMatcherId = HYPERTEXT_LINK_MATCHER_ID; |
2207d356 | 51 | |
b0624cad | 52 | constructor() { |
2207d356 | 53 | this._rowTimeoutIds = []; |
7167b06b | 54 | this._linkMatchers = []; |
012051c1 | 55 | this.registerLinkMatcher(strictUrlRegex, null, { matchIndex: 1 }); |
2207d356 DI |
56 | } |
57 | ||
b0624cad DI |
58 | /** |
59 | * Attaches the linkifier to the DOM, enabling linkification. | |
60 | * @param document The document object. | |
61 | * @param rows The array of rows to apply links to. | |
62 | */ | |
63 | public attachToDom(document: Document, rows: HTMLElement[]) { | |
64 | this._document = document; | |
65 | this._rows = rows; | |
66 | } | |
67 | ||
2207d356 DI |
68 | /** |
69 | * Queues a row for linkification. | |
70 | * @param {number} rowIndex The index of the row to linkify. | |
71 | */ | |
72 | public linkifyRow(rowIndex: number): void { | |
b0624cad DI |
73 | // Don't attempt linkify if not yet attached to DOM |
74 | if (!this._document) { | |
75 | return; | |
76 | } | |
77 | ||
2207d356 DI |
78 | const timeoutId = this._rowTimeoutIds[rowIndex]; |
79 | if (timeoutId) { | |
80 | clearTimeout(timeoutId); | |
81 | } | |
15d79143 | 82 | this._rowTimeoutIds[rowIndex] = setTimeout(this._linkifyRow.bind(this, rowIndex), Linkifier.TIME_BEFORE_LINKIFY); |
2207d356 DI |
83 | } |
84 | ||
7167b06b | 85 | /** |
3bf31aa4 DI |
86 | * Attaches a handler for hypertext links, overriding default <a> behavior |
87 | * for standard http(s) links. | |
7167b06b DI |
88 | * @param {LinkHandler} handler The handler to use, this can be cleared with |
89 | * null. | |
90 | */ | |
4c99c032 | 91 | public attachHypertextLinkHandler(handler: LinkMatcherHandler): void { |
7167b06b DI |
92 | this._linkMatchers[HYPERTEXT_LINK_MATCHER_ID].handler = handler; |
93 | } | |
94 | ||
95 | /** | |
96 | * Registers a link matcher, allowing custom link patterns to be matched and | |
97 | * handled. | |
3b62aa44 | 98 | * @param {RegExp} regex The regular expression to search for, specifically |
1ee774d0 DI |
99 | * this searches the textContent of the rows. You will want to use \s to match |
100 | * a space ' ' character for example. | |
7167b06b | 101 | * @param {LinkHandler} handler The callback when the link is called. |
6198556e | 102 | * @param {LinkMatcherOptions} [options] Options for the link matcher. |
7167b06b DI |
103 | * @return {number} The ID of the new matcher, this can be used to deregister. |
104 | */ | |
4c99c032 | 105 | public registerLinkMatcher(regex: RegExp, handler: LinkMatcherHandler, options: LinkMatcherOptions = {}): number { |
5183332f | 106 | if (this._nextLinkMatcherId !== HYPERTEXT_LINK_MATCHER_ID && !handler) { |
aafb5333 | 107 | throw new Error('handler must be defined'); |
7167b06b DI |
108 | } |
109 | const matcher: LinkMatcher = { | |
5183332f | 110 | id: this._nextLinkMatcherId++, |
7167b06b | 111 | regex, |
c8bb3216 | 112 | handler, |
6198556e | 113 | matchIndex: options.matchIndex, |
7ac4f1a9 DI |
114 | validationCallback: options.validationCallback, |
115 | priority: options.priority || 0 | |
7167b06b | 116 | }; |
7ac4f1a9 | 117 | this._addLinkMatcherToList(matcher); |
7167b06b DI |
118 | return matcher.id; |
119 | } | |
120 | ||
7ac4f1a9 DI |
121 | /** |
122 | * Inserts a link matcher to the list in the correct position based on the | |
123 | * priority of each link matcher. New link matchers of equal priority are | |
124 | * considered after older link matchers. | |
125 | * @param matcher The link matcher to be added. | |
126 | */ | |
127 | private _addLinkMatcherToList(matcher: LinkMatcher): void { | |
128 | if (this._linkMatchers.length === 0) { | |
129 | this._linkMatchers.push(matcher); | |
130 | return; | |
131 | } | |
132 | ||
133 | for (let i = this._linkMatchers.length - 1; i >= 0; i--) { | |
78d5fc95 | 134 | if (matcher.priority <= this._linkMatchers[i].priority) { |
7ac4f1a9 DI |
135 | this._linkMatchers.splice(i + 1, 0, matcher); |
136 | return; | |
137 | } | |
138 | } | |
139 | ||
78d5fc95 | 140 | this._linkMatchers.splice(0, 0, matcher); |
7ac4f1a9 DI |
141 | } |
142 | ||
7167b06b DI |
143 | /** |
144 | * Deregisters a link matcher if it has been registered. | |
145 | * @param {number} matcherId The link matcher's ID (returned after register) | |
1c030f57 | 146 | * @return {boolean} Whether a link matcher was found and deregistered. |
7167b06b | 147 | */ |
1c030f57 | 148 | public deregisterLinkMatcher(matcherId: number): boolean { |
7167b06b DI |
149 | // ID 0 is the hypertext link matcher which cannot be deregistered |
150 | for (let i = 1; i < this._linkMatchers.length; i++) { | |
151 | if (this._linkMatchers[i].id === matcherId) { | |
152 | this._linkMatchers.splice(i, 1); | |
1c030f57 | 153 | return true; |
7167b06b DI |
154 | } |
155 | } | |
1c030f57 | 156 | return false; |
2207d356 DI |
157 | } |
158 | ||
159 | /** | |
160 | * Linkifies a row. | |
161 | * @param {number} rowIndex The index of the row to linkify. | |
162 | */ | |
163 | private _linkifyRow(rowIndex: number): void { | |
c4f43184 DI |
164 | const row = this._rows[rowIndex]; |
165 | if (!row) { | |
166 | return; | |
167 | } | |
168 | const text = row.textContent; | |
e6fc80c1 | 169 | for (let i = 0; i < this._linkMatchers.length; i++) { |
7167b06b | 170 | const matcher = this._linkMatchers[i]; |
1ee774d0 | 171 | const uri = this._findLinkMatch(text, matcher.regex, matcher.matchIndex); |
7167b06b | 172 | if (uri) { |
235ae2fb | 173 | const linkElement = this._doLinkifyRow(rowIndex, uri, matcher.handler, matcher.id === HYPERTEXT_LINK_MATCHER_ID); |
6198556e | 174 | // Fire validation callback |
dcffaf1c | 175 | if (linkElement && matcher.validationCallback) { |
6198556e DI |
176 | matcher.validationCallback(uri, isValid => { |
177 | if (!isValid) { | |
178 | linkElement.classList.add(INVALID_LINK_CLASS); | |
179 | } | |
180 | }); | |
181 | } | |
7167b06b DI |
182 | // Only allow a single LinkMatcher to trigger on any given row. |
183 | return; | |
184 | } | |
a489037e | 185 | } |
7167b06b | 186 | } |
a489037e | 187 | |
7167b06b DI |
188 | /** |
189 | * Linkifies a row given a specific handler. | |
190 | * @param {number} rowIndex The index of the row to linkify. | |
191 | * @param {string} uri The uri that has been found. | |
192 | * @param {handler} handler The handler to trigger when the link is triggered. | |
6198556e | 193 | * @return The link element if it was added, otherwise undefined. |
7167b06b | 194 | */ |
235ae2fb | 195 | private _doLinkifyRow(rowIndex: number, uri: string, handler: LinkMatcherHandler, isHttpLinkMatcher: boolean): HTMLElement { |
a489037e DI |
196 | // Iterate over nodes as we want to consider text nodes |
197 | const nodes = this._rows[rowIndex].childNodes; | |
198 | for (let i = 0; i < nodes.length; i++) { | |
199 | const node = nodes[i]; | |
200 | const searchIndex = node.textContent.indexOf(uri); | |
201 | if (searchIndex >= 0) { | |
235ae2fb | 202 | const linkElement = this._createAnchorElement(uri, handler, isHttpLinkMatcher); |
99a27021 | 203 | if (node.textContent.length === uri.length) { |
a489037e | 204 | // Matches entire string |
26ebc3d9 DI |
205 | |
206 | if (node.nodeType === 3 /*Node.TEXT_NODE*/) { | |
a489037e DI |
207 | this._replaceNode(node, linkElement); |
208 | } else { | |
a489037e | 209 | const element = (<HTMLElement>node); |
c8bb3216 DI |
210 | if (element.nodeName === 'A') { |
211 | // This row has already been linkified | |
212 | return; | |
213 | } | |
a489037e DI |
214 | element.innerHTML = ''; |
215 | element.appendChild(linkElement); | |
216 | } | |
217 | } else { | |
218 | // Matches part of string | |
a489037e DI |
219 | this._replaceNodeSubstringWithNode(node, linkElement, uri, searchIndex); |
220 | } | |
6198556e | 221 | return linkElement; |
a489037e | 222 | } |
2207d356 DI |
223 | } |
224 | } | |
225 | ||
226 | /** | |
1ee774d0 DI |
227 | * Finds a link match in a piece of text. |
228 | * @param {string} text The text to search. | |
c8bb3216 | 229 | * @param {number} matchIndex The regex match index of the link. |
a489037e | 230 | * @return {string} The matching URI or null if not found. |
2207d356 | 231 | */ |
1ee774d0 DI |
232 | private _findLinkMatch(text: string, regex: RegExp, matchIndex?: number): string { |
233 | const match = text.match(regex); | |
2207d356 DI |
234 | if (!match || match.length === 0) { |
235 | return null; | |
236 | } | |
c8bb3216 | 237 | return match[typeof matchIndex !== 'number' ? 0 : matchIndex]; |
2207d356 | 238 | } |
a489037e DI |
239 | |
240 | /** | |
241 | * Creates a link anchor element. | |
242 | * @param {string} uri The uri of the link. | |
243 | * @return {HTMLAnchorElement} The link. | |
244 | */ | |
1f518b0b | 245 | private _createAnchorElement(uri: string, handler: LinkMatcherHandler, isHypertextLinkHandler: boolean): HTMLAnchorElement { |
26ebc3d9 | 246 | const element = this._document.createElement('a'); |
a489037e | 247 | element.textContent = uri; |
adde8ab2 | 248 | element.draggable = false; |
1f518b0b | 249 | if (isHypertextLinkHandler) { |
a489037e | 250 | element.href = uri; |
0f3ee21d DI |
251 | // Force link on another tab so work is not lost |
252 | element.target = '_blank'; | |
aafb5333 DI |
253 | element.addEventListener('click', (event: MouseEvent) => { |
254 | if (handler) { | |
255 | return handler(event, uri); | |
c7b4c2be DI |
256 | } |
257 | }); | |
1f518b0b DI |
258 | } else { |
259 | element.addEventListener('click', (event: MouseEvent) => { | |
260 | // Don't execute the handler if the link is flagged as invalid | |
261 | if (element.classList.contains(INVALID_LINK_CLASS)) { | |
262 | return; | |
263 | } | |
264 | return handler(event, uri); | |
265 | }); | |
a489037e DI |
266 | } |
267 | return element; | |
268 | } | |
269 | ||
270 | /** | |
271 | * Replace a node with 1 or more other nodes. | |
272 | * @param {Node} oldNode The node to replace. | |
273 | * @param {Node[]} newNodes The new nodes to insert in order. | |
274 | */ | |
275 | private _replaceNode(oldNode: Node, ...newNodes: Node[]): void { | |
276 | const parent = oldNode.parentNode; | |
277 | for (let i = 0; i < newNodes.length; i++) { | |
278 | parent.insertBefore(newNodes[i], oldNode); | |
279 | } | |
280 | parent.removeChild(oldNode); | |
281 | } | |
282 | ||
283 | /** | |
284 | * Replace a substring within a node with a new node. | |
0f3ee21d DI |
285 | * @param {Node} targetNode The target node; either a text node or a <span> |
286 | * containing a single text node. | |
a489037e DI |
287 | * @param {Node} newNode The new node to insert. |
288 | * @param {string} substring The substring to replace. | |
289 | * @param {number} substringIndex The index of the substring within the string. | |
290 | */ | |
291 | private _replaceNodeSubstringWithNode(targetNode: Node, newNode: Node, substring: string, substringIndex: number): void { | |
292 | let node = targetNode; | |
26ebc3d9 | 293 | if (node.nodeType !== 3/*Node.TEXT_NODE*/) { |
a489037e DI |
294 | node = node.childNodes[0]; |
295 | } | |
0f3ee21d DI |
296 | |
297 | // The targetNode will be either a text node or a <span>. The text node | |
298 | // (targetNode or its only-child) needs to be replaced with newNode plus new | |
299 | // text nodes potentially on either side. | |
a489037e DI |
300 | if (node.childNodes.length === 0 && node.nodeType !== Node.TEXT_NODE) { |
301 | throw new Error('targetNode must be a text node or only contain a single text node'); | |
302 | } | |
303 | ||
304 | const fullText = node.textContent; | |
305 | ||
306 | if (substringIndex === 0) { | |
307 | // Replace with <newNode><textnode> | |
a489037e | 308 | const rightText = fullText.substring(substring.length); |
26ebc3d9 | 309 | const rightTextNode = this._document.createTextNode(rightText); |
a489037e DI |
310 | this._replaceNode(node, newNode, rightTextNode); |
311 | } else if (substringIndex === targetNode.textContent.length - substring.length) { | |
312 | // Replace with <textnode><newNode> | |
a489037e | 313 | const leftText = fullText.substring(0, substringIndex); |
26ebc3d9 | 314 | const leftTextNode = this._document.createTextNode(leftText); |
a489037e DI |
315 | this._replaceNode(node, leftTextNode, newNode); |
316 | } else { | |
317 | // Replace with <textnode><newNode><textnode> | |
a489037e | 318 | const leftText = fullText.substring(0, substringIndex); |
26ebc3d9 | 319 | const leftTextNode = this._document.createTextNode(leftText); |
a489037e | 320 | const rightText = fullText.substring(substringIndex + substring.length); |
26ebc3d9 | 321 | const rightTextNode = this._document.createTextNode(rightText); |
a489037e DI |
322 | this._replaceNode(node, leftTextNode, newNode, rightTextNode); |
323 | } | |
324 | } | |
2207d356 | 325 | } |