// Copyright (c) 2008-2009 Kris Maglione // // This work is licensed for reuse under an MIT license. Details are // given in the LICENSE.txt file included with this file. /* Adds support for data: URIs with chrome privileges * and fragment identifiers. * * "chrome-data:" [; ]* "," [] * * By Kris Maglione, ideas from Ed Anuff's nsChromeExtensionHandler. */ const Ci = Components.interfaces, Cc = Components.classes; Components.utils.import("resource://gre/modules/XPCOMUtils.jsm"); const NS_BINDING_ABORTED = 0x804b0002; const nsIProtocolHandler = Components.interfaces.nsIProtocolHandler; const ioService = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService); let channel = Components.classesByID["{61ba33c0-3031-11d3-8cd0-0060b0fc14a3}"] .getService(Ci.nsIProtocolHandler) .newChannel(ioService.newURI("chrome://liberator/content/data", null, null)) .QueryInterface(Ci.nsIRequest); const systemPrincipal = channel.owner; channel.cancel(NS_BINDING_ABORTED); delete channel; function makeChannel(url, orig) { let uri = ioService.newURI(url, null, null); let channel = ioService.newChannelFromURI(uri); channel.owner = systemPrincipal; channel.originalURI = orig; return channel; } function fakeChannel(orig) makeChannel("chrome://liberator/content/does/not/exist", orig); function redirect(to, orig) { let html = .toXMLString(); return makeChannel('data:text/html,' + escape(html), orig); } function ChromeData() {} ChromeData.prototype = { contractID: "@mozilla.org/network/protocol;1?name=chrome-data", classID: Components.ID("{c1b67a07-18f7-4e13-b361-2edcc35a5a0d}"), classDescription: "Data URIs with chrome privileges", QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsIProtocolHandler]), _xpcom_factory: { createInstance: function (outer, iid) { if (!ChromeData.instance) ChromeData.instance = new ChromeData(); if (outer != null) throw Components.results.NS_ERROR_NO_AGGREGATION; return ChromeData.instance.QueryInterface(iid); } }, scheme: "chrome-data", defaultPort: -1, allowPort: function (port, scheme) false, protocolFlags: nsIProtocolHandler.URI_NORELATIVE | nsIProtocolHandler.URI_NOAUTH | nsIProtocolHandler.URI_IS_UI_RESOURCE, newURI: function (spec, charset, baseURI) { var uri = Components.classes["@mozilla.org/network/standard-url;1"] .createInstance(Components.interfaces.nsIStandardURL) .QueryInterface(Components.interfaces.nsIURI); uri.init(uri.URLTYPE_STANDARD, this.defaultPort, spec, charset, null); return uri; }, newChannel: function (uri) { try { if (uri.scheme == this.scheme) return makeChannel(uri.spec.replace(/^.*?:\/*(.*)(?:#.*)?/, "data:$1"), uri); } catch (e) {} return fakeChannel(); } }; function Liberator() { this.wrappedJSObject = this; this.__defineGetter__("helpNamespaces", function () this.NAMESPACES ? this.NAMESPACES.slice() : null); this.__defineSetter__("helpNamespaces", function (namespaces) { if (!this.NAMESPACES) parseHelpTags(namespaces); }); function xpath(doc, expression) { let result = doc.evaluate(expression, doc, function lookupNamespaceURI(prefix) ({ xhtml: "http://www.w3.org/1999/xhtml", liberator: "http://vimperator.org/namespaces/liberator", }[prefix] || null), 5, null); result.__iterator__ = function () { let elem; while ((elem = this.iterateNext())) yield elem; }; return result; } this.httpGet = httpGet; function httpGet(url) { try { let xmlhttp = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(Ci.nsIXMLHttpRequest); xmlhttp.open("GET", url, false); xmlhttp.send(null); return xmlhttp; } catch (e) {} } const self = this; this.HELP_TAGS = {}; this.FILE_MAP = {}; this.OVERLAY_MAP = {}; this.NAMESPACES = null; var HELP_FILES = null; function XSLTProcessor(sheet) { let xslt = Cc["@mozilla.org/document-transformer;1?type=xslt"].createInstance(Ci.nsIXSLTProcessor); xslt.importStylesheet(httpGet(sheet).responseXML); return xslt; } function findHelpFile(file) { let result = []; for each (let namespace in self.NAMESPACES) { let url = ["chrome://", namespace, "/locale/", file, ".xml"].join(""); let res = httpGet(url); if (res) { if (res.responseXML.documentElement.localName == "document") self.FILE_MAP[file] = url; if (res.responseXML.documentElement.localName == "overlay") self.OVERLAY_MAP[file] = url; if (res.responseXML.documentElement.localName == "document") result = [url, res.responseXML]; } } return result; } function parseHelpTags(namespaces) { HELP_FILES = []; self.NAMESPACES = Array.slice(namespaces); findHelpFile("all"); const XSLT = XSLTProcessor("chrome://liberator/content/help.xsl"); self.HELP_TAGS.all = "all"; for each (let namespace in self.NAMESPACES) { let files = xpath( httpGet("chrome://" + namespace + "/locale/all.xml").responseXML, "//liberator:include/@href"); for each (let file in files) { let [url, doc] = findHelpFile(file.value); if (!doc) continue; self.FILE_MAP[file.value] = url; doc = XSLT.transformToDocument(doc); for (let elem in xpath(doc, "//liberator:tag/text()")) self.HELP_TAGS[elem.textContent] = file.value; HELP_FILES.push(file.value); } } } } Liberator.prototype = { contractID: "@mozilla.org/network/protocol;1?name=liberator", classID: Components.ID("{9c8f2530-51c8-4d41-b356-319e0b155c44}"), classDescription: "Liberator utility protocol", QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsIProtocolHandler]), _xpcom_factory: { createInstance: function (outer, iid) { if (!Liberator.instance) Liberator.instance = new Liberator(); if (outer != null) throw Components.results.NS_ERROR_NO_AGGREGATION; return Liberator.instance.QueryInterface(iid); } }, scheme: "liberator", defaultPort: -1, allowPort: function (port, scheme) false, protocolFlags: 0 | nsIProtocolHandler.URI_LOADABLE_BY_ANYONE | nsIProtocolHandler.URI_IS_LOCAL_RESOURCE, newURI: function (spec, charset, baseURI) { var uri = Components.classes["@mozilla.org/network/standard-url;1"] .createInstance(Components.interfaces.nsIStandardURL) .QueryInterface(Components.interfaces.nsIURI); uri.init(uri.URLTYPE_STANDARD, this.defaultPort, spec, charset, baseURI); return uri; }, newChannel: function (uri) { try { switch(uri.host) { case "help": let url = this.FILE_MAP[uri.path.replace(/^\/|#.*/g, "")]; return makeChannel(url, uri); case "help-overlay": url = this.OVERLAY_MAP[uri.path.replace(/^\/|#.*/g, "")]; return makeChannel(url, uri); case "help-tag": let tag = uri.path.substr(1); if (tag in this.HELP_TAGS) return redirect("liberator://help/" + this.HELP_TAGS[tag] + "#" + tag, uri); } } catch (e) {} return fakeChannel(uri); } }; var components = [ChromeData, Liberator]; function NSGetModule(compMgr, fileSpec) { return XPCOMUtils.generateModule(components); } // vim: set fdm=marker sw=4 ts=4 et: