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[android-x86/external-webkit.git] / Source / WebCore / inspector / front-end / ExtensionAPI.js
1 /*
2  * Copyright (C) 2010 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30
31 WebInspector.injectedExtensionAPI = function(InjectedScriptHost, inspectedWindow, injectedScriptId)
32 {
33
34 // Here and below, all constructors are private to API implementation.
35 // For a public type Foo, if internal fields are present, these are on
36 // a private FooImpl type, an instance of FooImpl is used in a closure
37 // by Foo consutrctor to re-bind publicly exported members to an instance
38 // of Foo.
39
40 function EventSinkImpl(type, customDispatch)
41 {
42     this._type = type;
43     this._listeners = [];
44     this._customDispatch = customDispatch;
45 }
46
47 EventSinkImpl.prototype = {
48     addListener: function(callback)
49     {
50         if (typeof callback != "function")
51             throw new "addListener: callback is not a function";
52         if (this._listeners.length === 0)
53             extensionServer.sendRequest({ command: "subscribe", type: this._type });
54         this._listeners.push(callback);
55         extensionServer.registerHandler("notify-" + this._type, bind(this._dispatch, this));
56     },
57
58     removeListener: function(callback)
59     {
60         var listeners = this._listeners;
61
62         for (var i = 0; i < listeners.length; ++i) {
63             if (listeners[i] === callback) {
64                 listeners.splice(i, 1);
65                 break;
66             }
67         }
68         if (this._listeners.length === 0)
69             extensionServer.sendRequest({ command: "unsubscribe", type: this._type });
70     },
71
72     _fire: function()
73     {
74         var listeners = this._listeners.slice();
75         for (var i = 0; i < listeners.length; ++i)
76             listeners[i].apply(null, arguments);
77     },
78
79     _dispatch: function(request)
80     {
81          if (this._customDispatch)
82              this._customDispatch.call(this, request);
83          else
84              this._fire.apply(this, request.arguments);
85     }
86 }
87
88 function InspectorExtensionAPI()
89 {
90     this.audits = new Audits();
91     this.inspectedWindow = new InspectedWindow();
92     this.panels = new Panels();
93     this.resources = new Resources();
94
95     this.onReset = new EventSink("reset");
96 }
97
98 InspectorExtensionAPI.prototype = {
99     log: function(message)
100     {
101         extensionServer.sendRequest({ command: "log", message: message });
102     }
103 }
104
105 function Resources()
106 {
107     function resourceDispatch(request)
108     {
109         var resource = request.arguments[1];
110         resource.__proto__ = new Resource(request.arguments[0]);
111         this._fire(resource);
112     }
113     this.onFinished = new EventSink("resource-finished", resourceDispatch);
114 }
115
116 Resources.prototype = {
117     getHAR: function(callback)
118     {
119         function callbackWrapper(result)
120         {
121             var entries = (result && result.entries) || [];
122             for (var i = 0; i < entries.length; ++i) {
123                 entries[i].__proto__ = new Resource(entries[i]._resourceId);
124                 delete entries[i]._resourceId;
125             }
126             callback(result);
127         }
128         return extensionServer.sendRequest({ command: "getHAR" }, callback && callbackWrapper);
129     },
130
131     addRequestHeaders: function(headers)
132     {
133         return extensionServer.sendRequest({ command: "addRequestHeaders", headers: headers, extensionId: location.hostname });
134     }
135 }
136
137 function ResourceImpl(id)
138 {
139     this._id = id;
140 }
141
142 ResourceImpl.prototype = {
143     getContent: function(callback)
144     {
145         function callbackWrapper(response)
146         {
147             callback(response.content, response.encoding);
148         }
149         extensionServer.sendRequest({ command: "getResourceContent", id: this._id }, callback && callbackWrapper);
150     }
151 };
152
153 function Panels()
154 {
155     var panels = {
156         elements: new ElementsPanel()
157     };
158
159     function panelGetter(name)
160     {
161         return panels[name];
162     }
163     for (var panel in panels)
164         this.__defineGetter__(panel, bind(panelGetter, null, panel));
165 }
166
167 Panels.prototype = {
168     create: function(title, iconURL, pageURL, callback)
169     {
170         var id = "extension-panel-" + extensionServer.nextObjectId();
171         var request = {
172             command: "createPanel",
173             id: id,
174             title: title,
175             icon: expandURL(iconURL),
176             url: expandURL(pageURL)
177         };
178         extensionServer.sendRequest(request, callback && bind(callback, this, new ExtensionPanel(id)));
179     }
180 }
181
182 function PanelImpl(id)
183 {
184     this._id = id;
185 }
186
187 function PanelWithSidebarImpl(id)
188 {
189     PanelImpl.call(this, id);
190 }
191
192 PanelWithSidebarImpl.prototype = {
193     createSidebarPane: function(title, url, callback)
194     {
195         var id = "extension-sidebar-" + extensionServer.nextObjectId();
196         var request = {
197             command: "createSidebarPane",
198             panel: this._id,
199             id: id,
200             title: title,
201             url: expandURL(url)
202         };
203         function callbackWrapper()
204         {
205             callback(new ExtensionSidebarPane(id));
206         }
207         extensionServer.sendRequest(request, callback && callbackWrapper);
208     },
209
210     createWatchExpressionSidebarPane: function(title, callback)
211     {
212         var id = "watch-sidebar-" + extensionServer.nextObjectId();
213         var request = {
214             command: "createWatchExpressionSidebarPane",
215             panel: this._id,
216             id: id,
217             title: title
218         };
219         function callbackWrapper()
220         {
221             callback(new WatchExpressionSidebarPane(id));
222         }
223         extensionServer.sendRequest(request, callback && callbackWrapper);
224     }
225 }
226
227 PanelWithSidebarImpl.prototype.__proto__ = PanelImpl.prototype;
228
229 function ElementsPanel()
230 {
231     var id = "elements";
232     PanelWithSidebar.call(this, id);
233     this.onSelectionChanged = new EventSink("panel-objectSelected-" + id);
234 }
235
236 function ExtensionPanel(id)
237 {
238     Panel.call(this, id);
239     this.onSearch = new EventSink("panel-search-" + id);
240 }
241
242 function ExtensionSidebarPaneImpl(id)
243 {
244     this._id = id;
245 }
246
247 ExtensionSidebarPaneImpl.prototype = {
248     setHeight: function(height)
249     {
250         extensionServer.sendRequest({ command: "setSidebarHeight", id: this._id, height: height });
251     }
252 }
253
254 function WatchExpressionSidebarPaneImpl(id)
255 {
256     ExtensionSidebarPaneImpl.call(this, id);
257     this.onUpdated = new EventSink("watch-sidebar-updated-" + id);
258 }
259
260 WatchExpressionSidebarPaneImpl.prototype = {
261     setExpression: function(expression, rootTitle)
262     {
263         extensionServer.sendRequest({ command: "setWatchSidebarContent", id: this._id, expression: expression, rootTitle: rootTitle, evaluateOnPage: true });
264     },
265
266     setObject: function(jsonObject, rootTitle)
267     {
268         extensionServer.sendRequest({ command: "setWatchSidebarContent", id: this._id, expression: jsonObject, rootTitle: rootTitle });
269     }
270 }
271
272 WatchExpressionSidebarPaneImpl.prototype.__proto__ = ExtensionSidebarPaneImpl.prototype;
273
274 function WatchExpressionSidebarPane(id)
275 {
276     var impl = new WatchExpressionSidebarPaneImpl(id);
277     ExtensionSidebarPane.call(this, id, impl);
278 }
279
280 function Audits()
281 {
282 }
283
284 Audits.prototype = {
285     addCategory: function(displayName, resultCount)
286     {
287         var id = "extension-audit-category-" + extensionServer.nextObjectId();
288         extensionServer.sendRequest({ command: "addAuditCategory", id: id, displayName: displayName, resultCount: resultCount });
289         return new AuditCategory(id);
290     }
291 }
292
293 function AuditCategoryImpl(id)
294 {
295     function auditResultDispatch(request)
296     {
297         var auditResult = new AuditResult(request.arguments[0]);
298         try {
299             this._fire(auditResult);
300         } catch (e) {
301             console.error("Uncaught exception in extension audit event handler: " + e);
302             auditResult.done();
303         }
304     }
305     this._id = id;
306     this.onAuditStarted = new EventSink("audit-started-" + id, auditResultDispatch);
307 }
308
309 function AuditResultImpl(id)
310 {
311     this._id = id;
312
313     var formatterTypes = [
314         "url",
315         "snippet",
316         "text"
317     ];
318     for (var i = 0; i < formatterTypes.length; ++i)
319         this[formatterTypes[i]] = bind(this._nodeFactory, null, formatterTypes[i]);
320 }
321
322 AuditResultImpl.prototype = {
323     addResult: function(displayName, description, severity, details)
324     {
325         // shorthand for specifying details directly in addResult().
326         if (details && !(details instanceof AuditResultNode))
327             details = details instanceof Array ? this.createNode.apply(this, details) : this.createNode(details);
328
329         var request = {
330             command: "addAuditResult",
331             resultId: this._id,
332             displayName: displayName,
333             description: description,
334             severity: severity,
335             details: details
336         };
337         extensionServer.sendRequest(request);
338     },
339
340     createResult: function()
341     {
342         var node = new AuditResultNode();
343         node.contents = Array.prototype.slice.call(arguments);
344         return node;
345     },
346
347     done: function()
348     {
349         extensionServer.sendRequest({ command: "stopAuditCategoryRun", resultId: this._id });
350     },
351
352     get Severity()
353     {
354         return apiPrivate.audits.Severity;
355     },
356
357     _nodeFactory: function(type)
358     {
359         return {
360             type: type,
361             arguments: Array.prototype.slice.call(arguments, 1)
362         };
363     }
364 }
365
366 function AuditResultNode(contents)
367 {
368     this.contents = contents;
369     this.children = [];
370     this.expanded = false;
371 }
372
373 AuditResultNode.prototype = {
374     addChild: function()
375     {
376         var node = AuditResultImpl.prototype.createResult.apply(null, arguments);
377         this.children.push(node);
378         return node;
379     }
380 };
381
382 function InspectedWindow()
383 {
384     this.onDOMContentLoaded = new EventSink("inspectedPageDOMContentLoaded");
385     this.onLoaded = new EventSink("inspectedPageLoaded");
386     this.onNavigated = new EventSink("inspectedURLChanged");
387 }
388
389 InspectedWindow.prototype = {
390     reload: function(userAgent)
391     {
392         return extensionServer.sendRequest({ command: "reload", userAgent: userAgent });
393     },
394
395     eval: function(expression, callback)
396     {
397         function callbackWrapper(result)
398         {
399             var value = result.value;
400             if (!result.isException)
401                 value = value === "undefined" ? undefined : JSON.parse(value);
402             callback(value, result.isException);
403         }
404         return extensionServer.sendRequest({ command: "evaluateOnInspectedPage", expression: expression }, callback && callbackWrapper);
405     }
406 }
407
408 function ExtensionServerClient()
409 {
410     this._callbacks = {};
411     this._handlers = {};
412     this._lastRequestId = 0;
413     this._lastObjectId = 0;
414
415     this.registerHandler("callback", bind(this._onCallback, this));
416
417     var channel = new MessageChannel();
418     this._port = channel.port1;
419     this._port.addEventListener("message", bind(this._onMessage, this), false);
420     this._port.start();
421
422     top.postMessage("registerExtension", [ channel.port2 ], "*");
423 }
424
425 ExtensionServerClient.prototype = {
426     sendRequest: function(message, callback)
427     {
428         if (typeof callback === "function")
429             message.requestId = this._registerCallback(callback);
430         return this._port.postMessage(message);
431     },
432
433     registerHandler: function(command, handler)
434     {
435         this._handlers[command] = handler;
436     },
437
438     nextObjectId: function()
439     {
440         return injectedScriptId + "_" + ++this._lastObjectId;
441     },
442
443     _registerCallback: function(callback)
444     {
445         var id = ++this._lastRequestId;
446         this._callbacks[id] = callback;
447         return id;
448     },
449
450     _onCallback: function(request)
451     {
452         if (request.requestId in this._callbacks) {
453             var callback = this._callbacks[request.requestId];
454             delete this._callbacks[request.requestId];
455             callback(request.result);
456         }
457     },
458
459     _onMessage: function(event)
460     {
461         var request = event.data;
462         var handler = this._handlers[request.command];
463         if (handler)
464             handler.call(this, request);
465     }
466 }
467
468 function expandURL(url)
469 {
470     if (!url)
471         return url;
472     if (/^[^/]+:/.exec(url)) // See if url has schema.
473         return url;
474     var baseURL = location.protocol + "//" + location.hostname + location.port;
475     if (/^\//.exec(url))
476         return baseURL + url;
477     return baseURL + location.pathname.replace(/\/[^/]*$/,"/") + url;
478 }
479
480 function bind(func, thisObject)
481 {
482     var args = Array.prototype.slice.call(arguments, 2);
483     return function() { return func.apply(thisObject, args.concat(Array.prototype.slice.call(arguments, 0))); };
484 }
485
486 function populateInterfaceClass(interface, implementation)
487 {
488     for (var member in implementation) {
489         if (member.charAt(0) === "_")
490             continue;
491         var value = implementation[member];
492         interface[member] = typeof value === "function" ? bind(value, implementation)
493             : interface[member] = implementation[member];
494     }
495 }
496
497 function declareInterfaceClass(implConstructor)
498 {
499     return function()
500     {
501         var impl = { __proto__: implConstructor.prototype };
502         implConstructor.apply(impl, arguments);
503         populateInterfaceClass(this, impl);
504     }
505 }
506
507 var AuditCategory = declareInterfaceClass(AuditCategoryImpl);
508 var AuditResult = declareInterfaceClass(AuditResultImpl);
509 var EventSink = declareInterfaceClass(EventSinkImpl);
510 var ExtensionSidebarPane = declareInterfaceClass(ExtensionSidebarPaneImpl);
511 var Panel = declareInterfaceClass(PanelImpl);
512 var PanelWithSidebar = declareInterfaceClass(PanelWithSidebarImpl);
513 var Resource = declareInterfaceClass(ResourceImpl);
514 var WatchExpressionSidebarPane = declareInterfaceClass(WatchExpressionSidebarPaneImpl);
515
516 var extensionServer = new ExtensionServerClient();
517
518 webInspector = new InspectorExtensionAPI();
519
520 }