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