1 // Copyright (c) 2009-2011 by Kris Maglione <maglione.k@gmail.com>
3 // This work is licensed for reuse under an MIT license. Details are
4 // given in the LICENSE.txt file included with this file.
9 Components.utils.import("resource://dactyl/bootstrap.jsm");
10 defineModule("overlay", {
15 var getAttr = function getAttr(elem, ns, name)
16 elem.hasAttributeNS(ns, name) ? elem.getAttributeNS(ns, name) : null;
17 var setAttr = function setAttr(elem, ns, name, val) {
19 elem.removeAttributeNS(ns, name);
21 elem.setAttributeNS(ns, name, val);
24 var Overlay = Class("Overlay", {
25 init: function init(window) {
29 cleanups: Class.Memoize(function () []),
30 objects: Class.Memoize(function () ({})),
32 get doc() this.window.document,
34 get win() this.window,
36 $: function $(sel, node) DOM(sel, node || this.doc),
38 cleanup: function cleanup(window, reason) {
39 for (let fn in values(this.cleanups))
40 util.trapErrors(fn, this, window, reason);
45 var Overlay = Module("Overlay", XPCOM([Ci.nsIObserver, Ci.nsISupportsWeakReference]), {
46 init: function init() {
47 util.addObserver(this);
50 this.onWindowVisible = [];
53 id: Class.Memoize(function () config.addon.id),
56 * Adds an event listener for this session and removes it on
59 * @param {Element} target The element on which to listen.
60 * @param {string} event The event to listen for.
61 * @param {function} callback The function to call when the event is received.
62 * @param {boolean} capture When true, listen during the capture
63 * phase, otherwise during the bubbling phase.
64 * @param {boolean} allowUntrusted When true, allow capturing of
67 listen: function (target, event, callback, capture, allowUntrusted) {
68 let doc = target.ownerDocument || target.document || target;
69 let listeners = this.getData(doc, "listeners");
72 var [self, events] = [null, array.toObject([[event, callback]])];
74 [self, events] = [event, event[callback || "events"]];
76 for (let [event, callback] in Iterator(events)) {
77 let args = [util.weakReference(target),
79 util.wrapCallback(callback, self),
83 target.addEventListener.apply(target, args.slice(1));
89 * Remove an event listener.
91 * @param {Element} target The element on which to listen.
92 * @param {string} event The event to listen for.
93 * @param {function} callback The function to call when the event is received.
94 * @param {boolean} capture When true, listen during the capture
95 * phase, otherwise during the bubbling phase.
97 unlisten: function (target, event, callback, capture) {
98 let doc = target.ownerDocument || target.document || target;
99 let listeners = this.getData(doc, "listeners");
103 this.setData(doc, "listeners", listeners.filter(function (args) {
104 if (target == null || args[0].get() == target && args[1] == event && args[2].wrapped == callback && args[3] == capture) {
105 args[0].get().removeEventListener.apply(args[0].get(), args.slice(1));
108 return !args[0].get();
112 cleanup: function cleanup(reason) {
113 for (let doc in util.iterDocuments()) {
114 for (let elem in values(this.getData(doc, "overlayElements")))
116 elem.parentNode.removeChild(elem);
118 for (let [elem, ns, name, orig, value] in values(this.getData(doc, "overlayAttributes")))
119 if (getAttr(elem, ns, name) === value)
120 setAttr(elem, ns, name, orig);
122 for (let callback in values(this.getData(doc, "cleanup")))
123 util.trapErrors(callback, doc, reason);
125 this.unlisten(doc, true);
128 delete doc.defaultView[this.id];
133 "toplevel-window-ready": function (window, data) {
134 let listener = util.wrapCallback(function listener(event) {
135 if (event.originalTarget === window.document) {
136 window.removeEventListener("DOMContentLoaded", listener.wrapper, true);
137 window.removeEventListener("load", listener.wrapper, true);
138 overlay._loadOverlays(window);
142 window.addEventListener("DOMContentLoaded", listener, true);
143 window.addEventListener("load", listener, true);
145 "chrome-document-global-created": function (window, uri) { this.observe(window, "toplevel-window-ready", null); },
146 "content-document-global-created": function (window, uri) { this.observe(window, "toplevel-window-ready", null); },
147 "xul-window-visible": function () {
148 if (this.onWindowVisible)
149 this.onWindowVisible.forEach(function (f) f.call(this), this);
150 this.onWindowVisible = null;
154 getData: function getData(obj, key, constructor) {
157 if (!(id in obj && obj[id]))
160 if (arguments.length == 1)
163 if (obj[id][key] === undefined)
164 if (constructor === undefined || callable(constructor))
165 obj[id][key] = (constructor || Array)();
167 obj[id][key] = constructor;
172 setData: function setData(obj, key, val) {
178 return obj[id][key] = val;
181 overlayWindow: function (url, fn) {
182 if (url instanceof Ci.nsIDOMWindow)
183 overlay._loadOverlay(url, fn);
185 Array.concat(url).forEach(function (url) {
186 if (!this.overlays[url])
187 this.overlays[url] = [];
188 this.overlays[url].push(fn);
191 for (let doc in util.iterDocuments())
192 if (~["interactive", "complete"].indexOf(doc.readyState)) {
193 this.observe(doc.defaultView, "xul-window-visible");
194 this._loadOverlays(doc.defaultView);
197 if (!this.onWindowVisible)
198 this.onWindowVisible = [];
199 this.observe(doc.defaultView, "toplevel-window-ready");
204 _loadOverlays: function _loadOverlays(window) {
205 let overlays = this.getData(window, "overlays");
207 for each (let obj in overlay.overlays[window.document.documentURI] || []) {
208 if (~overlays.indexOf(obj))
211 this._loadOverlay(window, obj(window));
215 _loadOverlay: function _loadOverlay(window, obj) {
216 let doc = window.document;
217 let elems = this.getData(doc, "overlayElements");
218 let attrs = this.getData(doc, "overlayAttributes");
220 function insert(key, fn) {
222 let iterator = Iterator(obj[key]);
223 if (!isObject(obj[key]))
224 iterator = ([elem.@id, elem.elements(), elem.@*::*.(function::name() != "id")] for each (elem in obj[key]));
226 for (let [elem, xml, attr] in iterator) {
227 if (elem = doc.getElementById(elem)) {
228 let node = DOM.fromXML(xml, doc, obj.objects);
229 if (!(node instanceof Ci.nsIDOMDocumentFragment))
232 for (let n in array.iterValues(node.childNodes))
236 for each (let attr in attr || []) {
237 let ns = attr.namespace(), name = attr.localName();
238 attrs.push([elem, ns, name, getAttr(elem, ns, name), String(attr)]);
239 if (attr.name() != "highlight")
240 elem.setAttributeNS(ns, name, String(attr));
242 highlight.highlightNode(elem, String(attr));
249 insert("before", function (elem, dom) elem.parentNode.insertBefore(dom, elem));
250 insert("after", function (elem, dom) elem.parentNode.insertBefore(dom, elem.nextSibling));
251 insert("append", function (elem, dom) elem.appendChild(dom));
252 insert("prepend", function (elem, dom) elem.insertBefore(dom, elem.firstChild));
254 util.trapErrors("ready", obj, window);
256 function load(event) {
257 util.trapErrors("load", obj, window, event);
259 if (!event || !overlay.onWindowVisible || window != util.topWindow(window))
260 util.trapErrors("visible", obj, window);
262 overlay.onWindowVisible.push(function () { obj.visible(window) });
266 if (doc.readyState === "complete")
269 window.addEventListener("load", util.wrapCallback(function onLoad(event) {
270 if (event.originalTarget === doc) {
271 window.removeEventListener("load", onLoad.wrapper, true);
276 if (obj.unload || obj.cleanup)
277 this.listen(window, "unload", function unload(event) {
278 if (event.originalTarget === doc) {
279 overlay.unlisten(window, "unload", unload);
281 util.trapErrors("unload", obj, window, event);
284 util.trapErrors("cleanup", obj, window, "unload", event);
289 this.getData(doc, "cleanup").push(bind("cleanup", obj, window));
293 * Overlays an object with the given property overrides. Each
294 * property in *overrides* is added to *object*, replacing any
295 * original value. Functions in *overrides* are augmented with the
296 * new properties *super*, *supercall*, and *superapply*, in the
297 * same manner as class methods, so that they may call their
298 * overridden counterparts.
300 * @param {object} object The object to overlay.
301 * @param {object} overrides An object containing properties to
303 * @returns {function} A function which, when called, will remove
306 overlayObject: function (object, overrides) {
307 let original = Object.create(object);
308 overrides = update(Object.create(original), overrides);
310 Object.getOwnPropertyNames(overrides).forEach(function (k) {
311 let orig, desc = Object.getOwnPropertyDescriptor(overrides, k);
312 if (desc.value instanceof Class.Property)
313 desc = desc.value.init(k) || desc.value;
316 for (let obj = object; obj && !orig; obj = Object.getPrototypeOf(obj))
317 if (orig = Object.getOwnPropertyDescriptor(obj, k))
318 Object.defineProperty(original, k, orig);
321 if (orig = Object.getPropertyDescriptor(object, k))
322 Object.defineProperty(original, k, orig);
325 // Guard against horrible add-ons that use eval-based monkey
327 let value = desc.value;
328 if (callable(desc.value)) {
331 delete desc.writable;
332 desc.get = function get() value;
333 desc.set = function set(val) {
334 if (!callable(val) || Function.prototype.toString(val).indexOf(sentinel) < 0)
335 Class.replaceProperty(this, k, val);
337 let package_ = util.newURI(Components.stack.caller.filename).host;
338 util.reportError(Error(_("error.monkeyPatchOverlay", package_)));
339 util.dactyl.echoerr(_("error.monkeyPatchOverlay", package_));
345 Object.defineProperty(object, k, desc);
347 if (callable(value)) {
348 var sentinel = "(function DactylOverlay() {}())"
349 value.toString = function toString() toString.toString.call(this).replace(/\}?$/, sentinel + "; $&");
350 value.toSource = function toSource() toSource.toSource.call(this).replace(/\}?$/, sentinel + "; $&");
365 return function unwrap() {
366 for each (let k in Object.getOwnPropertyNames(original))
367 if (Object.getOwnPropertyDescriptor(object, k).configurable)
368 Object.defineProperty(object, k, Object.getOwnPropertyDescriptor(original, k));
371 object[k] = original[k];
378 get activeModules() this.activeWindow && this.activeWindow.dactyl.modules,
380 get modules() this.windows.map(function (w) w.dactyl.modules),
383 * The most recently active dactyl window.
385 get activeWindow() this.windows[0],
387 set activeWindow(win) this.windows = [win].concat(this.windows.filter(function (w) w != win)),
390 * A list of extant dactyl windows.
392 windows: Class.Memoize(function () [])
397 } catch(e){ if (!e.stack) e = Error(e); dump(e.fileName+":"+e.lineNumber+": "+e+"\n" + e.stack); }
399 // vim: set fdm=marker sw=4 ts=4 et ft=javascript: