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// Copyright (c) 2008-2010 Kris Maglione <maglione.k at Gmail>
//
// This work is licensed for reuse under an MIT license. Details are
// given in the LICENSE.txt file included with this file.
"use strict";
/* Adds support for data: URIs with chrome privileges
* and fragment identifiers.
*
* "chrome-data:" <content-type> [; <flag>]* "," [<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);
const prefs = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefService)
.getBranch("extensions.dactyl.");
const systemPrincipal = Cc["@mozilla.org/systemprincipal;1"].getService(Ci.nsIPrincipal);
function dataURL(type, data) "data:" + (type || "application/xml;encoding=UTF-8") + "," + escape(data);
function makeChannel(url, orig) {
if (typeof url == "function")
url = dataURL.apply(null, url());
let uri = ioService.newURI(url, null, null);
let channel = ioService.newChannelFromURI(uri);
channel.contentCharset = "UTF-8";
channel.owner = systemPrincipal;
channel.originalURI = orig;
return channel;
}
function fakeChannel(orig) makeChannel("chrome://dactyl/content/does/not/exist", orig);
function redirect(to, orig, time) {
let html = <html><head><meta http-equiv="Refresh" content={(time || 0) + ";" + to}/></head></html>.toXMLString();
return makeChannel(dataURL('text/html', html), ioService.newURI(to, null, null));
}
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 (outer != null)
throw Components.results.NS_ERROR_NO_AGGREGATION;
if (!ChromeData.instance)
ChromeData.instance = new ChromeData();
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 Dactyl() {
this.wrappedJSObject = this;
this.HELP_TAGS = {};
this.FILE_MAP = {};
this.OVERLAY_MAP = {};
this.addonID = this.name + "@dactyl.googlecode.com";
}
Dactyl.prototype = {
contractID: "@mozilla.org/network/protocol;1?name=dactyl",
classID: Components.ID("{9c8f2530-51c8-4d41-b356-319e0b155c44}"),
classDescription: "Dactyl utility protocol",
QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsIProtocolHandler]),
_xpcom_factory: {
createInstance: function (outer, iid) {
if (outer != null)
throw Components.results.NS_ERROR_NO_AGGREGATION;
if (!Dactyl.instance)
Dactyl.instance = new Dactyl();
return Dactyl.instance.QueryInterface(iid);
}
},
appName: prefs.getComplexValue("appName", Ci.nsISupportsString).data,
name: prefs.getComplexValue("name", Ci.nsISupportsString).data,
idName: prefs.getComplexValue("idName", Ci.nsISupportsString).data,
host: prefs.getComplexValue("host", Ci.nsISupportsString).data,
init: function (obj) {
for each (let prop in ["HELP_TAGS", "FILE_MAP", "OVERLAY_MAP"]) {
this[prop] = this[prop].constructor();
for (let [k, v] in Iterator(obj[prop] || {}))
this[prop][k] = v;
}
},
scheme: "dactyl",
defaultPort: -1,
allowPort: function (port, scheme) false,
protocolFlags: 0
| nsIProtocolHandler.URI_IS_UI_RESOURCE
| nsIProtocolHandler.URI_IS_LOCAL_RESOURCE,
newURI: function (spec, charset, baseURI) {
var uri = Cc["@mozilla.org/network/standard-url;1"]
.createInstance(Ci.nsIStandardURL)
.QueryInterface(Ci.nsIURI);
uri.init(uri.URLTYPE_STANDARD, this.defaultPort, spec, charset, baseURI);
return uri;
},
newChannel: function (uri) {
try {
if (!("all" in this.FILE_MAP))
return redirect(uri.spec, uri, 1);
switch(uri.host) {
case "help":
let url = this.FILE_MAP[decodeURIComponent(uri.path.replace(/^\/|#.*/g, ""))];
return makeChannel(url, uri);
case "help-overlay":
url = this.OVERLAY_MAP[decodeURIComponent(uri.path.replace(/^\/|#.*/g, ""))];
return makeChannel(url, uri);
case "help-tag":
let tag = decodeURIComponent(uri.path.substr(1));
if (tag in this.FILE_MAP)
return redirect("dactyl://help/" + tag, uri);
if (tag in this.HELP_TAGS)
return redirect("dactyl://help/" + this.HELP_TAGS[tag] + "#" + tag, uri);
}
}
catch (e) {}
return fakeChannel(uri);
}
};
function AboutHandler() {}
AboutHandler.prototype = {
classDescription: "About " + Dactyl.prototype.appName + " Page",
classID: Components.ID("81495d80-89ee-4c36-a88d-ea7c4e5ac63f"),
contractID: "@mozilla.org/network/protocol/about;1?what=" + Dactyl.prototype.name,
QueryInterface: XPCOMUtils.generateQI([Ci.nsIAboutModule]),
newChannel: function (uri) {
let channel = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService)
.newChannel("chrome://dactyl/content/about.xul", null, null);
channel.originalURI = uri;
return channel;
},
getURIFlags: function (uri) Ci.nsIAboutModule.ALLOW_SCRIPT,
};
// A hack to get information about interfaces.
// Doesn't belong here.
function Shim() {}
Shim.prototype = {
contractID: "@dactyl.googlecode.com/base/xpc-interface-shim",
classID: Components.ID("{f4506a17-5b4d-4cd9-92d4-2eb4630dc388}"),
classDescription: "XPCOM empty interface shim",
QueryInterface: function () this
};
if (XPCOMUtils.generateNSGetFactory)
const NSGetFactory = XPCOMUtils.generateNSGetFactory([AboutHandler, ChromeData, Dactyl, Shim]);
else
const NSGetModule = XPCOMUtils.generateNSGetModule([AboutHandler, ChromeData, Dactyl, Shim]);
// vim: set fdm=marker sw=4 ts=4 et:
|
