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1 // Copyright 2014 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 "use strict"; | |
6 | |
7 installClass("Document", function(DocumentPrototype) { | |
8 // FIXME: The stylesheet should be defined in a separate css file | |
9 var styleSheet = [ | |
10 "div.header {", | |
11 " border-bottom: 2px solid black;", | |
12 " padding-bottom: 5px;", | |
13 " margin: 10px;", | |
14 "}", | |
15 "", | |
16 "div.collapsible > div.hidden {", | |
17 " display:none;", | |
18 "}", | |
19 "", | |
20 ".pretty-print {", | |
21 " margin-top: 1em;", | |
22 " margin-left: 20px;", | |
23 " font-family: monospace;", | |
24 " font-size: 13px;", | |
25 "}", | |
26 "", | |
27 "#webkit-xml-viewer-source-xml {", | |
28 " display: none;", | |
29 "}", | |
30 "", | |
31 ".collapsible-content {", | |
32 " margin-left: 1em;", | |
33 "}", | |
34 ".comment {", | |
35 " white-space: pre;", | |
36 "}", | |
37 "", | |
38 ".button {", | |
39 " -webkit-user-select: none;", | |
40 " cursor: pointer;", | |
41 " display: inline-block;", | |
42 " margin-left: -10px;", | |
43 " width: 10px;", | |
44 " background-repeat: no-repeat;", | |
45 " background-position: left top;", | |
46 " vertical-align: bottom;", | |
47 "}", | |
48 "", | |
49 ".collapse-button {", | |
50 " background-image: -webkit-canvas(arrowDown);", | |
51 " height: 10px;", | |
52 "}", | |
53 "", | |
54 ".expand-button {", | |
55 " background-image: -webkit-canvas(arrowRight);", | |
56 " height: 11px;", | |
57 "}"].join(''); | |
58 var nodeParentPairs = []; | |
59 var tree; | |
60 | |
61 function prepareWebKitXMLViewer(noStyleMessage) | |
62 { | |
63 var html = createHTMLElement('html'); | |
64 var head = createHTMLElement('head'); | |
65 html.appendChild(head); | |
66 var style = createHTMLElement('style'); | |
67 style.id = 'xml-viewer-style'; | |
68 style.appendChild(document.createTextNode(styleSheet)); | |
69 head.appendChild(style); | |
70 var body = createHTMLElement('body'); | |
71 html.appendChild(body); | |
72 var sourceXML = createHTMLElement('div'); | |
73 sourceXML.id = 'webkit-xml-viewer-source-xml'; | |
74 body.appendChild(sourceXML); | |
75 | |
76 var child; | |
77 while (child = document.firstChild) { | |
78 document.removeChild(child); | |
79 if (child.nodeType != Node.DOCUMENT_TYPE_NODE) | |
80 sourceXML.appendChild(child); | |
81 } | |
82 document.appendChild(html); | |
83 | |
84 var header = createHTMLElement('div'); | |
85 body.appendChild(header); | |
86 header.classList.add('header'); | |
87 var headerSpan = createHTMLElement('span'); | |
88 header.appendChild(headerSpan); | |
89 headerSpan.textContent = noStyleMessage; | |
90 header.appendChild(createHTMLElement('br')); | |
91 | |
92 tree = createHTMLElement('div'); | |
93 body.appendChild(tree); | |
94 tree.classList.add('pretty-print'); | |
95 window.onload = sourceXMLLoaded; | |
96 } | |
97 | |
98 function sourceXMLLoaded() | |
99 { | |
100 var sourceXML = document.getElementById('webkit-xml-viewer-source-xml'); | |
101 if (!sourceXML) | |
102 return; // Stop if some XML tree extension is already processing thi s document | |
103 | |
104 for (var child = sourceXML.firstChild; child; child = child.nextSibling) | |
105 nodeParentPairs.push({parentElement: tree, node: child}); | |
106 | |
107 for (var i = 0; i < nodeParentPairs.length; i++) | |
108 processNode(nodeParentPairs[i].parentElement, nodeParentPairs[i].nod e); | |
109 | |
110 drawArrows(); | |
111 initButtons(); | |
112 | |
113 return false; | |
114 } | |
115 | |
116 // Tree processing. | |
117 | |
118 function processNode(parentElement, node) | |
119 { | |
120 if (!processNode.processorsMap) { | |
121 processNode.processorsMap = {}; | |
PhistucK
2014/09/02 07:36:45
Perhaps cache processNode.processorsMap instead of
| |
122 processNode.processorsMap[Node.PROCESSING_INSTRUCTION_NODE] = proces sProcessingInstruction; | |
123 processNode.processorsMap[Node.ELEMENT_NODE] = processElement; | |
124 processNode.processorsMap[Node.COMMENT_NODE] = processComment; | |
125 processNode.processorsMap[Node.TEXT_NODE] = processText; | |
126 processNode.processorsMap[Node.CDATA_SECTION_NODE] = processCDATA; | |
127 } | |
128 if (processNode.processorsMap[node.nodeType]) | |
129 processNode.processorsMap[node.nodeType].call(this, parentElement, n ode); | |
130 } | |
131 | |
132 function processElement(parentElement, node) | |
133 { | |
134 if (!node.firstChild) | |
135 processEmptyElement(parentElement, node); | |
136 else { | |
137 var child = node.firstChild; | |
138 if (child.nodeType == Node.TEXT_NODE && isShort(child.nodeValue) && !child.nextSibling) | |
139 processShortTextOnlyElement(parentElement, node); | |
140 else | |
141 processComplexElement(parentElement, node); | |
142 } | |
143 } | |
144 | |
145 function processEmptyElement(parentElement, node) | |
146 { | |
147 var line = createLine(); | |
148 line.appendChild(createTag(node, false, true)); | |
149 parentElement.appendChild(line); | |
150 } | |
151 | |
152 function processShortTextOnlyElement(parentElement, node) | |
153 { | |
154 var line = createLine(); | |
155 line.appendChild(createTag(node, false, false)); | |
156 for (var child = node.firstChild; child; child = child.nextSibling) | |
157 line.appendChild(createText(child.nodeValue)); | |
158 line.appendChild(createTag(node, true, false)); | |
159 parentElement.appendChild(line); | |
160 } | |
161 | |
162 function processComplexElement(parentElement, node) | |
163 { | |
164 var collapsible = createCollapsible(); | |
165 | |
166 collapsible.expanded.start.appendChild(createTag(node, false, false)); | |
PhistucK
2014/09/02 07:36:45
Same here.
| |
167 for (var child = node.firstChild; child; child = child.nextSibling) | |
168 nodeParentPairs.push({parentElement: collapsible.expanded.content, n ode: child}); | |
169 collapsible.expanded.end.appendChild(createTag(node, true, false)); | |
170 | |
171 collapsible.collapsed.content.appendChild(createTag(node, false, false)) ; | |
PhistucK
2014/09/02 07:36:45
Same here.
| |
172 collapsible.collapsed.content.appendChild(createText('...')); | |
173 collapsible.collapsed.content.appendChild(createTag(node, true, false)); | |
174 parentElement.appendChild(collapsible); | |
175 } | |
176 | |
177 function processComment(parentElement, node) | |
178 { | |
179 if (isShort(node.nodeValue)) { | |
180 var line = createLine(); | |
181 line.appendChild(createComment('<!-- ' + node.nodeValue + ' -->')); | |
182 parentElement.appendChild(line); | |
183 } else { | |
184 var collapsible = createCollapsible(); | |
185 | |
186 collapsible.expanded.start.appendChild(createComment('<!--')); | |
187 collapsible.expanded.content.appendChild(createComment(node.nodeValu e)); | |
188 collapsible.expanded.end.appendChild(createComment('-->')); | |
189 | |
190 collapsible.collapsed.content.appendChild(createComment('<!--')); | |
191 collapsible.collapsed.content.appendChild(createComment('...')); | |
192 collapsible.collapsed.content.appendChild(createComment('-->')); | |
193 parentElement.appendChild(collapsible); | |
194 } | |
195 } | |
196 | |
197 function processCDATA(parentElement, node) | |
198 { | |
199 if (isShort(node.nodeValue)) { | |
200 var line = createLine(); | |
201 line.appendChild(createText('<![CDATA[ ' + node.nodeValue + ' ]]>')) ; | |
202 parentElement.appendChild(line); | |
203 } else { | |
204 var collapsible = createCollapsible(); | |
205 | |
206 collapsible.expanded.start.appendChild(createText('<![CDATA[')); | |
207 collapsible.expanded.content.appendChild(createText(node.nodeValue)) ; | |
208 collapsible.expanded.end.appendChild(createText(']]>')); | |
209 | |
210 collapsible.collapsed.content.appendChild(createText('<![CDATA[')); | |
211 collapsible.collapsed.content.appendChild(createText('...')); | |
212 collapsible.collapsed.content.appendChild(createText(']]>')); | |
213 parentElement.appendChild(collapsible); | |
214 } | |
215 } | |
216 | |
217 function processProcessingInstruction(parentElement, node) | |
218 { | |
219 if (isShort(node.nodeValue)) { | |
220 var line = createLine(); | |
221 line.appendChild(createComment('<?' + node.nodeName + ' ' + node.nod eValue + '?>')); | |
222 parentElement.appendChild(line); | |
223 } else { | |
224 var collapsible = createCollapsible(); | |
225 | |
226 collapsible.expanded.start.appendChild(createComment('<?' + node.nod eName)); | |
227 collapsible.expanded.content.appendChild(createComment(node.nodeValu e)); | |
228 collapsible.expanded.end.appendChild(createComment('?>')); | |
229 | |
230 collapsible.collapsed.content.appendChild(createComment('<?' + node. nodeName)); | |
231 collapsible.collapsed.content.appendChild(createComment('...')); | |
232 collapsible.collapsed.content.appendChild(createComment('?>')); | |
233 parentElement.appendChild(collapsible); | |
234 } | |
235 } | |
236 | |
237 function processText(parentElement, node) | |
238 { | |
239 parentElement.appendChild(createText(node.nodeValue)); | |
240 } | |
241 | |
242 // Processing utils. | |
243 | |
244 function trim(value) | |
245 { | |
246 return value.replace(/^\s\s*/, '').replace(/\s\s*$/, ''); | |
247 } | |
248 | |
249 function isShort(value) | |
250 { | |
251 return trim(value).length <= 50; | |
252 } | |
253 | |
254 // Tree rendering. | |
255 | |
256 function createHTMLElement(elementName) | |
257 { | |
258 return document.createElementNS('http://www.w3.org/1999/xhtml', elementN ame) | |
259 } | |
260 | |
261 function createCollapsible() | |
262 { | |
263 var collapsible = createHTMLElement('div'); | |
264 collapsible.classList.add('collapsible'); | |
265 collapsible.expanded = createHTMLElement('div'); | |
266 collapsible.expanded.classList.add('expanded'); | |
267 collapsible.appendChild(collapsible.expanded); | |
268 | |
269 collapsible.expanded.start = createLine(); | |
270 collapsible.expanded.start.appendChild(createCollapseButton()); | |
271 collapsible.expanded.appendChild(collapsible.expanded.start); | |
272 | |
273 collapsible.expanded.content = createHTMLElement('div'); | |
274 collapsible.expanded.content.classList.add('collapsible-content'); | |
275 collapsible.expanded.appendChild(collapsible.expanded.content); | |
276 | |
277 collapsible.expanded.end = createLine(); | |
278 collapsible.expanded.appendChild(collapsible.expanded.end); | |
279 | |
280 collapsible.collapsed = createHTMLElement('div'); | |
281 collapsible.collapsed.classList.add('collapsed'); | |
282 collapsible.collapsed.classList.add('hidden'); | |
283 collapsible.appendChild(collapsible.collapsed); | |
284 collapsible.collapsed.content = createLine(); | |
285 collapsible.collapsed.content.appendChild(createExpandButton()); | |
286 collapsible.collapsed.appendChild(collapsible.collapsed.content); | |
287 | |
288 return collapsible; | |
289 } | |
290 | |
291 function createButton() | |
292 { | |
293 var button = createHTMLElement('span'); | |
294 button.classList.add('button'); | |
295 return button; | |
296 } | |
297 | |
298 function createCollapseButton(str) | |
299 { | |
300 var button = createButton(); | |
301 button.classList.add('collapse-button'); | |
302 return button; | |
303 } | |
304 | |
305 function createExpandButton(str) | |
306 { | |
307 var button = createButton(); | |
308 button.classList.add('expand-button'); | |
309 return button; | |
310 } | |
311 | |
312 function createComment(commentString) | |
313 { | |
314 var comment = createHTMLElement('span'); | |
315 comment.classList.add('comment'); | |
316 comment.classList.add('webkit-html-comment'); | |
317 comment.textContent = commentString; | |
318 return comment; | |
319 } | |
320 | |
321 function createText(value) | |
322 { | |
323 var text = createHTMLElement('span'); | |
324 text.textContent = trim(value); | |
325 text.classList.add('text'); | |
326 return text; | |
327 } | |
328 | |
329 function createLine() | |
330 { | |
331 var line = createHTMLElement('div'); | |
332 line.classList.add('line'); | |
333 return line; | |
334 } | |
335 | |
336 function createTag(node, isClosing, isEmpty) | |
337 { | |
338 var tag = createHTMLElement('span'); | |
339 tag.classList.add('webkit-html-tag'); | |
340 | |
341 var stringBeforeAttrs = '<'; | |
342 if (isClosing) | |
343 stringBeforeAttrs += '/'; | |
344 stringBeforeAttrs += node.nodeName; | |
345 var textBeforeAttrs = document.createTextNode(stringBeforeAttrs); | |
346 tag.appendChild(textBeforeAttrs); | |
347 | |
348 if (!isClosing) { | |
349 for (var i = 0; i < node.attributes.length; i++) | |
350 tag.appendChild(createAttribute(node.attributes[i])); | |
351 } | |
352 | |
353 var stringAfterAttrs = ''; | |
354 if (isEmpty) | |
355 stringAfterAttrs += '/'; | |
356 stringAfterAttrs += '>'; | |
357 var textAfterAttrs = document.createTextNode(stringAfterAttrs); | |
358 tag.appendChild(textAfterAttrs); | |
359 | |
360 return tag; | |
361 } | |
362 | |
363 function createAttribute(attributeNode) | |
364 { | |
365 var attribute = createHTMLElement('span'); | |
366 attribute.classList.add('webkit-html-attribute'); | |
367 | |
368 var attributeName = createHTMLElement('span'); | |
369 attributeName.classList.add('webkit-html-attribute-name'); | |
370 attributeName.textContent = attributeNode.name; | |
371 | |
372 var textBefore = document.createTextNode(' '); | |
373 var textBetween = document.createTextNode('="'); | |
374 | |
375 var attributeValue = createHTMLElement('span'); | |
376 attributeValue.classList.add('webkit-html-attribute-value'); | |
377 attributeValue.textContent = attributeNode.value; | |
378 | |
379 var textAfter = document.createTextNode('"'); | |
380 | |
381 attribute.appendChild(textBefore); | |
382 attribute.appendChild(attributeName); | |
383 attribute.appendChild(textBetween); | |
384 attribute.appendChild(attributeValue); | |
385 attribute.appendChild(textAfter); | |
386 return attribute; | |
387 } | |
388 | |
389 // Tree behaviour. | |
390 | |
391 function drawArrows() | |
392 { | |
393 var ctx = document.getCSSCanvasContext("2d", "arrowRight", 10, 11); | |
394 | |
395 ctx.fillStyle = "rgb(90,90,90)"; | |
396 ctx.beginPath(); | |
397 ctx.moveTo(0, 0); | |
398 ctx.lineTo(0, 8); | |
399 ctx.lineTo(7, 4); | |
400 ctx.lineTo(0, 0); | |
401 ctx.fill(); | |
402 ctx.closePath(); | |
403 | |
404 var ctx = document.getCSSCanvasContext("2d", "arrowDown", 10, 10); | |
405 | |
406 ctx.fillStyle = "rgb(90,90,90)"; | |
407 ctx.beginPath(); | |
408 ctx.moveTo(0, 0); | |
409 ctx.lineTo(8, 0); | |
410 ctx.lineTo(4, 7); | |
411 ctx.lineTo(0, 0); | |
412 ctx.fill(); | |
413 ctx.closePath(); | |
414 } | |
415 | |
416 function expandFunction(sectionId) | |
417 { | |
418 return function() | |
419 { | |
420 document.querySelector('#' + sectionId + ' > .expanded').className = 'expanded'; | |
421 document.querySelector('#' + sectionId + ' > .collapsed').className = 'collapsed hidden'; | |
422 }; | |
423 } | |
424 | |
425 function collapseFunction(sectionId) | |
426 { | |
427 return function() | |
428 { | |
429 document.querySelector('#' + sectionId + ' > .expanded').className = 'expanded hidden'; | |
430 document.querySelector('#' + sectionId + ' > .collapsed').className = 'collapsed'; | |
431 }; | |
432 } | |
433 | |
434 function initButtons() | |
435 { | |
436 var sections = document.querySelectorAll('.collapsible'); | |
437 for (var i = 0; i < sections.length; i++) { | |
438 var sectionId = 'collapsible' + i; | |
439 sections[i].id = sectionId; | |
440 | |
441 var expandedPart = sections[i].querySelector('#' + sectionId + ' > . expanded'); | |
442 var collapseButton = expandedPart.querySelector('.collapse-button'); | |
443 collapseButton.onclick = collapseFunction(sectionId); | |
444 collapseButton.onmousedown = handleButtonMouseDown; | |
445 | |
446 var collapsedPart = sections[i].querySelector('#' + sectionId + ' > .collapsed'); | |
447 var expandButton = collapsedPart.querySelector('.expand-button'); | |
448 expandButton.onclick = expandFunction(sectionId); | |
449 expandButton.onmousedown = handleButtonMouseDown; | |
450 } | |
451 | |
452 } | |
453 | |
454 function handleButtonMouseDown(e) | |
455 { | |
456 // To prevent selection on double click | |
457 e.preventDefault(); | |
458 } | |
459 | |
460 DocumentPrototype.transformDocumentToTreeView = function() { | |
461 prepareWebKitXMLViewer("This XML file does not appear to have any style information associated with it. The document tree is shown below."); | |
462 } | |
463 }); | |
464 | |
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