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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is Microsummarizer.
- *
- * The Initial Developer of the Original Code is Mozilla.
- * Portions created by the Initial Developer are Copyright (C) 2006
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * Myk Melez <myk@mozilla.org> (Original Author)
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- const Cc = Components.classes;
- const Ci = Components.interfaces;
-
- const PERMS_FILE = 0644;
- const MODE_WRONLY = 0x02;
- const MODE_TRUNCATE = 0x20;
-
- const NS_ERROR_MODULE_DOM = 2152923136;
- const NS_ERROR_DOM_BAD_URI = NS_ERROR_MODULE_DOM + 1012;
-
- // How often to update microsummaries, in milliseconds.
- // XXX Make this a hidden pref so power users can modify it.
- const UPDATE_INTERVAL = 30 * 60 * 1000; // 30 minutes
-
- // How often to check for microsummaries that need updating, in milliseconds.
- const CHECK_INTERVAL = 15 * 1000; // 15 seconds
-
- const MICSUM_NS = new Namespace("http://www.mozilla.org/microsummaries/0.1");
- const XSLT_NS = new Namespace("http://www.w3.org/1999/XSL/Transform");
-
- //@line 63 "/build/buildd/firefox-1.99+2.0b1+dfsg/browser/components/microsummaries/src/nsMicrosummaryService.js.in"
- const NC_NS = "http://home.netscape.com/NC-rdf#";
- const RDF_NS = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
- const FIELD_RDF_TYPE = RDF_NS + "type";
- const VALUE_MICSUM_BOOKMARK = NC_NS + "MicsumBookmark";
- const VALUE_NORMAL_BOOKMARK = NC_NS + "Bookmark";
- const FIELD_MICSUM_GEN_URI = NC_NS + "MicsumGenURI";
- const FIELD_MICSUM_EXPIRATION = NC_NS + "MicsumExpiration";
- const FIELD_GENERATED_TITLE = NC_NS + "GeneratedTitle";
- const FIELD_CONTENT_TYPE = NC_NS + "ContentType";
- const FIELD_BOOKMARK_URL = NC_NS + "URL";
- //@line 74 "/build/buildd/firefox-1.99+2.0b1+dfsg/browser/components/microsummaries/src/nsMicrosummaryService.js.in"
-
- function MicrosummaryService() {}
-
- MicrosummaryService.prototype = {
-
- //@line 98 "/build/buildd/firefox-1.99+2.0b1+dfsg/browser/components/microsummaries/src/nsMicrosummaryService.js.in"
- // RDF Service
- __rdf: null,
- get _rdf() {
- if (!this.__rdf)
- this.__rdf = Cc["@mozilla.org/rdf/rdf-service;1"].
- getService(Ci.nsIRDFService);
- return this.__rdf;
- },
-
- // Bookmarks Data Source
- __bmds: null,
- get _bmds() {
- if (!this.__bmds)
- this.__bmds = this._rdf.GetDataSource("rdf:bookmarks");
- return this.__bmds;
- },
-
- // Old Bookmarks Service
- __bms: null,
- get _bms() {
- if (!this.__bms)
- this.__bms = this._bmds.QueryInterface(Ci.nsIBookmarksService);
- return this.__bms;
- },
- //@line 123 "/build/buildd/firefox-1.99+2.0b1+dfsg/browser/components/microsummaries/src/nsMicrosummaryService.js.in"
-
- // IO Service
- __ios: null,
- get _ios() {
- if (!this.__ios)
- this.__ios = Cc["@mozilla.org/network/io-service;1"].
- getService(Ci.nsIIOService);
- return this.__ios;
- },
-
- // Observer Service
- __obs: null,
- get _obs() {
- if (!this.__obs)
- this.__obs = Cc["@mozilla.org/observer-service;1"].
- getService(Ci.nsIObserverService);
- return this.__obs;
- },
-
- /**
- * Make a URI from a spec.
- * @param spec
- * The string spec of the URI.
- * @returns An nsIURI object.
- */
- _uri: function MSS__uri(spec) {
- return this._ios.newURI(spec, null, null);
- },
-
- //@line 153 "/build/buildd/firefox-1.99+2.0b1+dfsg/browser/components/microsummaries/src/nsMicrosummaryService.js.in"
- /**
- * Make an RDF resource from a URI spec.
- * @param uriSpec
- * The URI spec to convert into a resource.
- * @returns An nsIRDFResource object.
- */
- _resource: function MSS__resource(uriSpec) {
- return this._rdf.GetResource(uriSpec);
- },
-
- /**
- * Make an RDF literal from a string.
- * @param str
- * The string from which to construct the literal.
- * @returns An nsIRDFLiteral object
- */
- _literal: function MSS__literal(str) {
- return this._rdf.GetLiteral(str);
- },
- //@line 173 "/build/buildd/firefox-1.99+2.0b1+dfsg/browser/components/microsummaries/src/nsMicrosummaryService.js.in"
-
- // Directory Locator
- __dirs: null,
- get _dirs() {
- if (!this.__dirs)
- this.__dirs = Cc["@mozilla.org/file/directory_service;1"].
- getService(Ci.nsIProperties);
- return this.__dirs;
- },
-
- // A cache of local microsummary generators. This gets built on startup
- // by the _cacheLocalGenerators() method.
- _localGenerators: {},
-
- // The timer that periodically checks for microsummaries needing updating.
- _timer: null,
-
- // Interfaces this component implements.
- interfaces: [Ci.nsIMicrosummaryService, Ci.nsIObserver, Ci.nsISupports],
-
- // nsISupports
-
- QueryInterface: function MSS_QueryInterface(iid) {
- //if (!this.interfaces.some( function(v) { return iid.equals(v) } ))
- if (!iid.equals(Ci.nsIMicrosummaryService) &&
- !iid.equals(Ci.nsIObserver) &&
- !iid.equals(Ci.nsISupportsWeakReference) &&
- !iid.equals(Ci.nsISupports))
- throw Components.results.NS_ERROR_NO_INTERFACE;
- return this;
- },
-
- // nsIObserver
-
- observe: function MSS_observe(subject, topic, data) {
- switch (topic) {
- case "xpcom-shutdown":
- this._destroy();
- break;
- }
- },
-
- _init: function MSS__init() {
- this._obs.addObserver(this, "xpcom-shutdown", true);
-
- // Periodically update microsummaries that need updating.
- this._timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
- var callback = {
- _svc: this,
- notify: function(timer) { this._svc._updateMicrosummaries() }
- };
- this._timer.initWithCallback(callback,
- CHECK_INTERVAL,
- this._timer.TYPE_REPEATING_SLACK);
-
- this._cacheLocalGenerators();
- },
-
- _destroy: function MSS__destroy() {
- this._timer.cancel();
- this._timer = null;
- },
-
- _updateMicrosummaries: function MSS__updateMicrosummaries() {
- //@line 247 "/build/buildd/firefox-1.99+2.0b1+dfsg/browser/components/microsummaries/src/nsMicrosummaryService.js.in"
- var bookmarks = [];
-
- var resources = this._bmds.GetSources(this._resource(FIELD_RDF_TYPE),
- this._resource(VALUE_MICSUM_BOOKMARK),
- true);
- while (resources.hasMoreElements())
- bookmarks.push(resources.getNext().QueryInterface(Ci.nsIRDFResource));
- //@line 255 "/build/buildd/firefox-1.99+2.0b1+dfsg/browser/components/microsummaries/src/nsMicrosummaryService.js.in"
-
- var now = new Date().getTime();
-
- for ( var i = 0; i < bookmarks.length; i++ ) {
- var bookmarkID = bookmarks[i];
-
- // Skip this page if its microsummary hasn't expired yet.
- if (this._hasField(bookmarkID, FIELD_MICSUM_EXPIRATION) &&
- this._getField(bookmarkID, FIELD_MICSUM_EXPIRATION) > now)
- continue;
-
- // Reset the expiration time immediately, so if the refresh is failing
- // we don't try it every 15 seconds, potentially overloading the server.
- var now = new Date().getTime();
- this._setField(bookmarkID, FIELD_MICSUM_EXPIRATION, now + UPDATE_INTERVAL);
-
- this.refreshMicrosummary(bookmarkID);
- }
- },
-
- _updateMicrosummary: function MSS__updateMicrosummary(bookmarkID, microsummary) {
- this._setField(bookmarkID, FIELD_GENERATED_TITLE, microsummary.content);
-
- var now = new Date().getTime();
- this._setField(bookmarkID, FIELD_MICSUM_EXPIRATION, now + UPDATE_INTERVAL);
-
- LOG("updated microsummary for page " + microsummary.pageURI.spec +
- " to " + microsummary.content);
- },
-
- /**
- * Load local generators into the cache.
- *
- */
- _cacheLocalGenerators: function MSS__cacheLocalGenerators() {
- // Load generators from the application directory.
- var appDir = this._dirs.get("MicsumGens", Ci.nsIFile);
- if (appDir.exists())
- this._cacheLocalGeneratorDir(appDir);
-
- // Load generators from the user's profile.
- var profileDir = this._dirs.get("UsrMicsumGens", Ci.nsIFile);
- if (profileDir.exists())
- this._cacheLocalGeneratorDir(profileDir);
- },
-
- /**
- * Load local generators from a directory into the cache.
- *
- * @param dir
- * nsIFile object pointing to directory containing generator files
- *
- */
- _cacheLocalGeneratorDir: function MSS__cacheLocalGeneratorDir(dir) {
- var files = dir.directoryEntries.QueryInterface(Ci.nsIDirectoryEnumerator);
- var file = files.nextFile;
-
- while (file) {
- // Recursively load generators so support packs containing
- // lots of generators can organize them into multiple directories.
- if (file.isDirectory())
- this._cacheLocalGeneratorDir(file);
- else
- this._cacheLocalGeneratorFile(file);
-
- file = files.nextFile;
- }
- files.close();
- },
-
- /**
- * Load a local generator from a file into the cache.
- *
- * @param file
- * nsIFile object pointing to file from which to load generator
- *
- */
- _cacheLocalGeneratorFile: function MSS__cacheLocalGeneratorFile(file) {
- var uri = this._ios.newFileURI(file);
-
- var t = this;
- var callback =
- function MSS_cacheLocalGeneratorCallback(resource) {
- try { t._handleLocalGenerator(resource) }
- finally { resource.destroy() }
- };
-
- var resource = new MicrosummaryResource(uri);
- resource.load(callback);
- },
-
- _handleLocalGenerator: function MSS__handleLocalGenerator(resource) {
- if (!resource.isXML)
- throw(resource.uri.spec + " microsummary generator loaded, but not XML");
-
- var generator = new MicrosummaryGenerator();
- generator.localURI = resource.uri;
- generator.initFromXML(resource.content);
-
- // Add the generator to the local generators cache.
- // XXX Figure out why Firefox crashes on shutdown if we index generators
- // by uri.spec but doesn't crash if we index by uri.spec.split().join().
- //this._localGenerators[generator.uri.spec] = generator;
- this._localGenerators[generator.uri.spec.split().join()] = generator;
-
- LOG("loaded local microsummary generator\n" +
- " local URI: " + generator.localURI.spec + "\n" +
- " source URI: " + generator.uri.spec);
- },
-
- // nsIMicrosummaryService
-
- /**
- * Install the microsummary generator from the resource at the supplied URI.
- * Callable by content via the addMicrosummaryGenerator() sidebar method.
- *
- * @param generatorURI
- * the URI of the resource providing the generator
- *
- */
- addGenerator: function MSS_addGenerator(generatorURI) {
- var t = this;
- var callback =
- function MSS_addGeneratorCallback(resource) {
- try { t._handleNewGenerator(resource) }
- finally { resource.destroy() }
- };
-
- var resource = new MicrosummaryResource(generatorURI);
- resource.load(callback);
- },
-
- _handleNewGenerator: function MSS__handleNewGenerator(resource) {
- if (!resource.isXML)
- throw(resource.uri.spec + " microsummary generator loaded, but not XML");
-
- // XXX Make sure it's a valid microsummary generator.
-
- var rootNode = resource.content.documentElement;
-
- // Add a reference to the URI from which we got this generator so we have
- // a unique identifier for the generator and also so we can check back later
- // for updates.
- rootNode.setAttribute("sourceURI", resource.uri.spec);
-
- var generatorName = rootNode.getAttribute("name");
- var fileName = sanitizeName(generatorName) + ".xml";
- var file = this._dirs.get("UsrMicsumGens", Ci.nsIFile);
- file.append(fileName);
- file.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, PERMS_FILE);
-
- var outputStream = Cc["@mozilla.org/network/safe-file-output-stream;1"].
- createInstance(Ci.nsIFileOutputStream);
- var localFile = file.QueryInterface(Ci.nsILocalFile);
- outputStream.init(localFile, (MODE_WRONLY | MODE_TRUNCATE), PERMS_FILE, 0);
- var serializer = Cc["@mozilla.org/xmlextras/xmlserializer;1"].
- createInstance(Ci.nsIDOMSerializer);
- serializer.serializeToStream(resource.content, outputStream, null);
- if (outputStream instanceof Ci.nsISafeOutputStream) {
- try { outputStream.finish() }
- catch (e) { outputStream.close() }
- }
- else
- outputStream.close();
-
- // Finally, cache the generator in the local generators cache.
- this._cacheLocalGeneratorFile(file);
- },
-
- /**
- * Get the set of microsummaries available for a given page. The set
- * might change after this method returns, since this method will trigger
- * an asynchronous load of the page in question (if it isn't already loaded)
- * to see if it references any page-specific microsummaries.
- *
- * If the caller passes a bookmark ID, and one of the microsummaries
- * is the current one for the bookmark, this method will retrieve content
- * from the datastore for that microsummary, which is useful when callers
- * want to display a list of microsummaries for a page that isn't loaded,
- * and they want to display the actual content of the selected microsummary
- * immediately (rather than after the content is asynchronously loaded).
- *
- * @param pageURI
- * the URI of the page for which to retrieve available microsummaries
- *
- * @param bookmarkID (optional)
- * the ID of the bookmark for which this method is being called
- *
- * @returns an nsIMicrosummarySet of nsIMicrosummaries for the given page
- *
- */
- getMicrosummaries: function MSS_getMicrosummaries(pageURI, bookmarkID) {
- var microsummaries = new MicrosummarySet();
-
- // Get microsummaries defined by local generators.
- for (var genURISpec in this._localGenerators) {
- var generator = this._localGenerators[genURISpec];
-
- if (generator.appliesToURI(pageURI)) {
- var microsummary = new Microsummary(pageURI, generator.uri);
- microsummary.generator = generator;
-
- // If this is the current microsummary for this bookmark, load the content
- // from the datastore so it shows up immediately in microsummary picking UI.
- if (bookmarkID && this.isMicrosummary(bookmarkID, microsummary))
- microsummary.content = this._getField(bookmarkID, FIELD_GENERATED_TITLE);
-
- microsummaries.AppendElement(microsummary);
- }
- }
-
- // Get microsummaries defined by the page. If we don't have the page,
- // download it asynchronously, and then finish populating the set.
- var resource = getLoadedMicrosummaryResource(pageURI);
- if (resource) {
- try { microsummaries.extractFromPage(resource) }
- finally { resource.destroy() }
- }
- else {
- // Load the page with a callback that will add the page's microsummaries
- // to the set once the page has loaded.
- var callback = function MSS_extractFromPageCallback(resource) {
- try { microsummaries.extractFromPage(resource) }
- finally { resource.destroy() }
- };
-
- try {
- resource = new MicrosummaryResource(pageURI);
- resource.load(callback);
- }
- catch(e) {
- // We don't have to do anything special if the call fails besides
- // destroying the Resource object. We can just return the list
- // of microsummaries without including page-defined microsummaries.
- if (resource)
- resource.destroy();
- LOG("error downloading page to extract its microsummaries: " + e);
- }
- }
-
- return microsummaries;
- },
-
- //@line 560 "/build/buildd/firefox-1.99+2.0b1+dfsg/browser/components/microsummaries/src/nsMicrosummaryService.js.in"
- _getField: function MSS__getField(bookmarkID, fieldName) {
- var bookmarkResource = bookmarkID.QueryInterface(Ci.nsIRDFResource);
- var fieldValue;
-
- var node = this._bmds.GetTarget(bookmarkResource,
- this._resource(fieldName),
- true);
- if (node) {
- if (fieldName == FIELD_RDF_TYPE)
- fieldValue = node.QueryInterface(Ci.nsIRDFResource).Value;
- else
- fieldValue = node.QueryInterface(Ci.nsIRDFLiteral).Value;
- }
- else
- fieldValue = null;
-
- return fieldValue;
- },
-
- _setField: function MSS__setField(bookmarkID, fieldName, fieldValue) {
- var bookmarkResource = bookmarkID.QueryInterface(Ci.nsIRDFResource);
-
- if (this._hasField(bookmarkID, fieldName)) {
- var oldValue = this._getField(bookmarkID, fieldName);
- this._bmds.Change(bookmarkResource,
- this._resource(fieldName),
- this._literal(oldValue),
- this._literal(fieldValue));
- }
- else {
- this._bmds.Assert(bookmarkResource,
- this._resource(fieldName),
- this._literal(fieldValue),
- true);
- }
-
- // If we're setting the generator URI field, make sure the bookmark's
- // RDF type is set to the microsummary bookmark type.
- if (fieldName == FIELD_MICSUM_GEN_URI &&
- this._getField(bookmarkID, FIELD_RDF_TYPE) != VALUE_MICSUM_BOOKMARK) {
- if (this._hasField(bookmarkID, FIELD_RDF_TYPE)) {
- oldValue = this._getField(bookmarkID, FIELD_RDF_TYPE);
- this._bmds.Change(bookmarkResource,
- this._resource(FIELD_RDF_TYPE),
- this._resource(oldValue),
- this._resource(VALUE_MICSUM_BOOKMARK));
- }
- else {
- this._bmds.Assert(bookmarkResource,
- this._resource(FIELD_RDF_TYPE),
- this._resource(VALUE_MICSUM_BOOKMARK),
- true);
- }
- }
-
- // If we're setting a field that could affect this bookmark's label,
- // then force all bookmark trees to rebuild from scratch.
- if (fieldName == FIELD_MICSUM_GEN_URI || fieldName == FIELD_GENERATED_TITLE)
- this._forceBookmarkTreesRebuild();
- },
-
- _clearField: function MSS__clearField(bookmarkID, fieldName) {
- var bookmarkResource = bookmarkID.QueryInterface(Ci.nsIRDFResource);
-
- var node = this._bmds.GetTarget(bookmarkResource,
- this._resource(fieldName),
- true);
- if (node) {
- this._bmds.Unassert(bookmarkResource,
- this._resource(fieldName),
- node);
- }
-
- // If we're clearing the generator URI field, set the bookmark's RDF type
- // back to the normal bookmark type.
- if (fieldName == FIELD_MICSUM_GEN_URI &&
- this._getField(bookmarkID, FIELD_RDF_TYPE) == VALUE_MICSUM_BOOKMARK)
- this._bmds.Change(bookmarkResource,
- this._resource(FIELD_RDF_TYPE),
- this._resource(VALUE_MICSUM_BOOKMARK),
- this._resource(VALUE_NORMAL_BOOKMARK));
-
- // If we're clearing a field that could affect this bookmark's label,
- // then force all bookmark trees to rebuild from scratch.
- if (fieldName == FIELD_MICSUM_GEN_URI || fieldName == FIELD_GENERATED_TITLE)
- this._forceBookmarkTreesRebuild();
- },
-
- _hasField: function MSS__hasField(bookmarkID, fieldName) {
- var bookmarkResource = bookmarkID.QueryInterface(Ci.nsIRDFResource);
-
- var node = this._bmds.GetTarget(bookmarkResource,
- this._resource(fieldName),
- true);
- return node ? true : false;
- },
-
- /**
- * Oy vey, a hack! Force the bookmark trees to rebuild, since they don't
- * seem to be able to do it correctly on their own right after we twiddle
- * something microsummaryish (but they rebuild fine otherwise, incorporating
- * all the microsummary changes upon next full rebuild, f.e. if you open
- * a new window or shut down and restart your browser).
- *
- */
- _forceBookmarkTreesRebuild: function MSS__forceBookmarkTreesRebuild() {
- var mediator = Cc["@mozilla.org/appshell/window-mediator;1"].
- getService(Ci.nsIWindowMediator);
- var windows = mediator.getEnumerator("navigator:browser");
- while (windows.hasMoreElements()) {
- var win = windows.getNext();
-
- // rebuild the bookmarks toolbar
- var bookmarksToolbar = win.document.getElementById("bookmarks-ptf");
- if (bookmarksToolbar)
- bookmarksToolbar.builder.rebuild();
-
- // rebuild the bookmarks sidebar
- var sidebar = win.document.getElementById("sidebar");
- // sidebar.docShell is null if the sidebar isn't showing, in which case
- // sidebar.contentWindow will throw an exception (because it assumes
- // the existence of sidebar.docShell), so we have to check for .docShell
- // before we check for .contentWindow.
- if (sidebar && sidebar.docShell && sidebar.contentWindow &&
- sidebar.contentWindow.location ==
- "chrome://browser/content/bookmarks/bookmarksPanel.xul") {
- var treeElement = sidebar.contentDocument.getElementById("bookmarks-view");
- treeElement.tree.builder.rebuild();
- }
- }
-
- windows = mediator.getEnumerator("bookmarks:manager");
- while (windows.hasMoreElements()) {
- win = windows.getNext();
- // rebuild the Bookmarks Manager's view
- treeElement = win.document.getElementById("bookmarks-view");
- treeElement.tree.builder.rebuild();
- }
- },
-
- /**
- * Get the URI of the page to which a given bookmark refers.
- *
- * @param bookmarkResource
- * an nsIResource uniquely identifying the bookmark
- *
- * @returns an nsIURI object representing the bookmark's page,
- * or null if the bookmark doesn't exist
- *
- */
- _getPageForBookmark: function MSS__getPageForBookmark(bookmarkID) {
- var bookmarkResource = bookmarkID.QueryInterface(Ci.nsIRDFResource);
-
- var node = this._bmds.GetTarget(bookmarkResource,
- this._resource(NC_NS + "URL"),
- true);
-
- if (!node)
- return null;
-
- var pageSpec = node.QueryInterface(Ci.nsIRDFLiteral).Value;
- var pageURI = this._uri(pageSpec);
- return pageURI;
- },
- //@line 725 "/build/buildd/firefox-1.99+2.0b1+dfsg/browser/components/microsummaries/src/nsMicrosummaryService.js.in"
-
- /**
- * Get the current microsummary for the given bookmark.
- *
- * @param bookmarkID
- * the bookmark for which to get the current microsummary
- *
- * @returns the current microsummary for the bookmark, or null
- * if the bookmark does not have a current microsummary
- *
- */
- getMicrosummary: function MSS_getMicrosummary(bookmarkID) {
- if (!this.hasMicrosummary(bookmarkID))
- return null;
-
- var pageURI = this._getPageForBookmark(bookmarkID);
- var generatorURI = this._uri(this._getField(bookmarkID, FIELD_MICSUM_GEN_URI));
-
- var microsummary = new Microsummary(pageURI, generatorURI);
- if (this._localGenerators[generatorURI.spec])
- microsummary.generator = this._localGenerators[generatorURI.spec];
-
- return microsummary;
- },
-
- /**
- * Set the current microsummary for the given bookmark.
- *
- * @param bookmarkID
- * the bookmark for which to set the current microsummary
- *
- * @param microsummary
- * the microsummary to set as the current one
- *
- */
- setMicrosummary: function MSS_setMicrosummary(bookmarkID, microsummary) {
- this._setField(bookmarkID, FIELD_MICSUM_GEN_URI, microsummary.generatorURI.spec);
- if (microsummary.content)
- this._updateMicrosummary(bookmarkID, microsummary);
- else
- this.refreshMicrosummary(bookmarkID);
- },
-
- /**
- * Remove the current microsummary for the given bookmark.
- *
- * @param bookmarkID
- * the bookmark for which to remove the current microsummary
- *
- */
- removeMicrosummary: function MSS_removeMicrosummary(bookmarkID) {
- var fields = [FIELD_MICSUM_GEN_URI,
- FIELD_MICSUM_EXPIRATION,
- FIELD_GENERATED_TITLE,
- FIELD_CONTENT_TYPE];
-
- for ( var i = 0; i < fields.length; i++ ) {
- var field = fields[i];
- if (this._hasField(bookmarkID, field))
- this._clearField(bookmarkID, field);
- }
- },
-
- /**
- * Whether or not the given bookmark has a current microsummary.
- *
- * @param bookmarkID
- * the bookmark for which to set the current microsummary
- *
- * @returns a boolean representing whether or not the given bookmark
- * has a current microsummary
- *
- */
- hasMicrosummary: function MSS_hasMicrosummary(bookmarkID) {
- return this._hasField(bookmarkID, FIELD_MICSUM_GEN_URI);
- },
-
- /**
- * Whether or not the given microsummary is the current microsummary
- * for the given bookmark.
- *
- * @param bookmarkID
- * the bookmark to check
- *
- * @param microsummary
- * the microsummary to check
- *
- * @returns whether or not the microsummary is the current one
- * for the bookmark
- *
- */
- isMicrosummary: function MSS_isMicrosummary(bookmarkID, microsummary) {
- if (!this.hasMicrosummary(bookmarkID))
- return false;
-
- var currentGen = this._getField(bookmarkID, FIELD_MICSUM_GEN_URI);
-
- if (microsummary.generatorURI.equals(this._uri(currentGen)))
- return true;
-
- return false
- },
-
- /**
- * Refresh a microsummary, updating its value in the datastore and UI.
- * If this method can refresh the microsummary instantly, it will.
- * Otherwise, it'll asynchronously download the necessary information
- * (the generator and/or page) before refreshing the microsummary.
- *
- * Callers should check the "content" property of the returned microsummary
- * object to distinguish between sync and async refreshes. If its value
- * is "null", then it's an async refresh, and the caller should register
- * itself as an nsIMicrosummaryObserver via nsIMicrosummary.addObserver()
- * to find out when the refresh completes.
- *
- * @param bookmarkID
- * the bookmark whose microsummary is being refreshed
- *
- * @returns the microsummary being refreshed
- *
- */
- refreshMicrosummary: function MSS_refreshMicrosummary(bookmarkID) {
- if (!this.hasMicrosummary(bookmarkID))
- throw "bookmark " + bookmarkID + " does not have a microsummary";
-
- var pageURI = this._getPageForBookmark(bookmarkID);
- var generatorURI = this._uri(this._getField(bookmarkID, FIELD_MICSUM_GEN_URI));
- var microsummary = new Microsummary(pageURI, generatorURI);
- if (this._localGenerators[generatorURI.spec])
- microsummary.generator = this._localGenerators[generatorURI.spec];
-
- // A microsummary observer that calls the microsummary service
- // to update the datastore when the microsummary finishes loading.
- var observer = {
- _svc: this,
- _bookmarkID: bookmarkID,
- onContentLoaded: function MSS_observer_onContentLoaded(microsummary) {
- try {
- this._svc._updateMicrosummary(this._bookmarkID, microsummary);
- }
- finally {
- this._svc = null;
- this._bookmarkID = null;
- microsummary.removeObserver(this);
- }
- }
- };
-
- // Register the observer with the microsummary and trigger the microsummary
- // to update itself.
- microsummary.addObserver(observer);
- microsummary.update();
-
- return microsummary;
- }
- };
-
-
-
-
-
- function Microsummary(pageURI, generatorURI) {
- this._observers = [];
- this.pageURI = pageURI;
- this.generatorURI = generatorURI;
- }
-
- Microsummary.prototype = {
- interfaces: [Ci.nsIMicrosummary, Ci.nsISupports],
-
- // nsISupports
-
- QueryInterface: function (iid) {
- //if (!this.interfaces.some( function(v) { return iid.equals(v) } ))
- if (!iid.equals(Ci.nsIMicrosummary) &&
- !iid.equals(Ci.nsISupports))
- throw Components.results.NS_ERROR_NO_INTERFACE;
- return this;
- },
-
- // nsIMicrosummary
-
- _content: null,
- get content() {
- // If we have everything we need to generate the content, generate it.
- if (this._content == null &&
- this.generator &&
- (this.pageContent || !this.generator.needsPageContent))
- this._content = this.generator.generateMicrosummary(this.pageContent);
-
- // Note: we return "null" if the content wasn't already generated and we
- // couldn't retrieve it from the generated title annotation or generate it
- // ourselves. So callers shouldn't count on getting content; instead,
- // they should call update if the return value of this getter is "null",
- // setting an observer to tell them when content generation is done.
- return this._content;
- },
- set content(newValue) { this._content = newValue },
-
- _generatorURI: null,
- get generatorURI() { return this._generatorURI },
- set generatorURI(newValue) { this._generatorURI = newValue },
-
- _generator: null,
- get generator() { return this._generator },
- set generator(newValue) { this._generator = newValue },
-
- _pageURI: null,
- get pageURI() { return this._pageURI },
- set pageURI(newValue) { this._pageURI = newValue },
-
- _pageContent: null,
- get pageContent() {
- if (!this._pageContent) {
- // If the page is currently loaded into a browser window, use that.
- var resource = getLoadedMicrosummaryResource(this.pageURI);
- if (resource) {
- this._pageContent = resource.content;
- resource.destroy();
- }
- }
-
- return this._pageContent;
- },
- set pageContent(newValue) { this._pageContent = newValue },
-
- // nsIMicrosummary
-
- _observers: null,
-
- addObserver: function MS_addObserver(observer) {
- // Register the observer, but only if it isn't already registered,
- // so that we don't call the same observer twice for any given change.
- if (this._observers.indexOf(observer) == -1)
- this._observers.push(observer);
- },
-
- removeObserver: function MS_removeObserver(observer) {
- //NS_ASSERT(this._observers.indexOf(observer) != -1,
- // "can't remove microsummary observer " + observer + ": not registered");
-
- //this._observers =
- // this._observers.filter(function(i) { observer != i });
- if (this._observers.indexOf(observer) != -1)
- this._observers.splice(this._observers.indexOf(observer), 1);
- },
-
- /**
- * Regenerates the microsummary, asynchronously downloading its generator
- * and content as needed.
- *
- */
- update: function MS_update() {
- LOG("microsummary.update called for page:\n " + this.pageURI.spec +
- "\nwith generator:\n " + this.generatorURI.spec);
-
- var t = this;
-
- // If we don't have the generator, download it now. After it downloads,
- // we'll re-call this method to continue updating the microsummary.
- if (!this.generator) {
- LOG("generator not yet loaded; downloading it");
- var generatorCallback =
- function MS_generatorCallback(resource) {
- try { t._handleGeneratorLoad(resource) }
- finally { resource.destroy() }
- };
- var resource = new MicrosummaryResource(this.generatorURI);
- resource.load(generatorCallback);
- return;
- }
-
- // If we need the page content, and we don't have it, download it now.
- // Afterwards we'll re-call this method to continue updating the microsummary.
- if (this.generator.needsPageContent && !this.pageContent) {
- LOG("page content not yet loaded; downloading it");
- var pageCallback =
- function MS_pageCallback(resource) {
- try { t._handlePageLoad(resource) }
- finally { resource.destroy() }
- };
- var resource = new MicrosummaryResource(this.pageURI);
- resource.load(pageCallback);
- return;
- }
-
- LOG("generator (and page, if needed) both loaded; generating microsummary");
-
- // Now that we have both the generator and (if needed) the page content,
- // generate the microsummary, then let the observers know about it.
- this.content = this.generator.generateMicrosummary(this.pageContent);
- this.pageContent = null;
- for ( var i = 0; i < this._observers.length; i++ )
- this._observers[i].onContentLoaded(this);
-
- LOG("generated microsummary: " + this.content);
- },
-
- _handleGeneratorLoad: function MS__handleGeneratorLoad(resource) {
- var generator = new MicrosummaryGenerator();
- generator.uri = resource.uri;
- LOG(generator.uri.spec + " microsummary generator downloaded");
- if (resource.isXML)
- generator.initFromXML(resource.content);
- else if (resource.contentType == "text/plain")
- generator.initFromText(resource.content);
- else
- throw("generator is neither XML nor plain text");
-
- this.generator = generator;
- this.update();
- },
-
- _handlePageLoad: function MS__handlePageLoad(resource) {
- if (!resource.isXML && !resource.contentType == "text/html")
- throw("page is neither HTML nor XML");
-
- this.pageContent = resource.content;
- this.update();
- }
-
- };
-
-
-
-
-
- function MicrosummaryGenerator() {}
-
- MicrosummaryGenerator.prototype = {
-
- // IO Service
- __ios: null,
- get _ios() {
- if (!this.__ios)
- this.__ios = Cc["@mozilla.org/network/io-service;1"].
- getService(Ci.nsIIOService);
- return this.__ios;
- },
-
- interfaces: [Ci.nsIMicrosummaryGenerator, Ci.nsISupports],
-
- // nsISupports
-
- QueryInterface: function (iid) {
- //if (!this.interfaces.some( function(v) { return iid.equals(v) } ))
- if (!iid.equals(Ci.nsIMicrosummaryGenerator) &&
- !iid.equals(Ci.nsISupports))
- throw Components.results.NS_ERROR_NO_INTERFACE;
- return this;
- },
-
- // nsIMicrosummaryGenerator
-
- // Normally this is just the URL from which we download the generator,
- // but for generators stored in the app or profile generators directory
- // it's the value of the generator tag's sourceURI attribute (or the
- // generator's local URI should the sourceURI be missing).
- _uri: null,
- get uri() { return this._uri },
- set uri(newValue) { this._uri = newValue },
-
- // For generators bundled with the browser or installed by the user,
- // the local URI is the URI of the local file containing the generator XML.
- _localURI: null,
- get localURI() { return this._localURI },
- set localURI(newValue) { this._localURI = newValue },
-
- _name: null,
- get name() { return this._name },
- set name(newValue) { this._name = newValue },
-
- _template: null,
- get template() { return this._template },
- set template(newValue) { this._template = newValue },
-
- _content: null,
- get content() { return this._content },
- set content(newValue) { this._content = newValue },
-
- _rules: null,
-
- /**
- * Determines whether or not the generator applies to a given URI.
- * By default, the generator does not apply to any URI. In order for it
- * to apply to a URI, the URI must match one or more of the generator's
- * "include" rules and not match any of the generator's "exclude" rules.
- *
- * @param uri
- * the URI to test to see if this generator applies to it
- *
- * @returns boolean
- * whether or not the generator applies to the given URI
- *
- */
- appliesToURI: function(uri) {
- var applies = false;
-
- for ( var i = 0 ; i < this._rules.length ; i++ ) {
- var rule = this._rules[i];
-
- switch (rule.type) {
- case "include":
- if (rule.regexp.test(uri.spec))
- applies = true;
- break;
- case "exclude":
- if (rule.regexp.test(uri.spec))
- return false;
- break;
- }
- }
-
- return applies;
- },
-
- get needsPageContent() {
- if (this.template)
- return true;
- else if (this.content)
- return false;
- else
- throw("needsPageContent called on uninitialized microsummary generator");
- },
-
- /**
- * Initializes a generator from text content. Generators initialized
- * from text content merely return that content when their generate() method
- * gets called.
- *
- * @param text
- * the text content
- *
- */
- initFromText: function(text) {
- this.content = text;
- },
-
- /**
- * Initializes a generator from an XML description of it.
- *
- * @param xmlDocument
- * An XMLDocument object describing a microsummary generator.
- *
- */
- initFromXML: function(xmlDocument) {
- // XXX Make sure the argument is a valid generator XML document.
-
- // XXX I would have wanted to retrieve the info from the XML via E4X,
- // but we'll need to pass the XSLT transform sheet to the XSLT processor,
- // and the processor can't deal with an E4X-wrapped template node.
-
- // XXX Right now the code retrieves the first "generator" element
- // in the microsummaries namespace, regardless of whether or not
- // it's the root element. Should it matter?
- var generatorNode = xmlDocument.getElementsByTagNameNS(MICSUM_NS, "generator")[0];
- // XXX We should throw instead of returning if the file doesn't contain
- // a generator.
- if (!generatorNode)
- return;
-
- this.name = generatorNode.getAttribute("name");
-
- // Only set the source URI from the XML if we have a local URI, i.e.
- // if this is a locally-installed generator, since for remote generators
- // the source URI of the generator is the URI from which we downloaded it.
- if (this.localURI) {
- this.uri = generatorNode.hasAttribute("sourceURI") ?
- this._ios.newURI(generatorNode.getAttribute("sourceURI"), null, null) :
- this.localURI; // locally created generator without sourceURI
- }
-
- // Slurp the include/exclude rules that determine the pages to which
- // this generator applies. Order is important, so we add the rules
- // in the order in which they appear in the XML.
- this._rules = [];
- var pages = generatorNode.getElementsByTagNameNS(MICSUM_NS, "pages")[0];
- if (pages) {
- // XXX Make sure the pages tag exists.
- for ( var i = 0; i < pages.childNodes.length ; i++ ) {
- var node = pages.childNodes[i];
- if (node.nodeType != node.ELEMENT_NODE ||
- node.namespaceURI != MICSUM_NS ||
- (node.nodeName != "include" && node.nodeName != "exclude"))
- continue;
- this._rules.push({ type: node.nodeName, regexp: new RegExp(node.textContent) });
- }
- }
-
- var templateNode = generatorNode.getElementsByTagNameNS(MICSUM_NS, "template")[0];
- if (templateNode) {
- this.template = templateNode.getElementsByTagNameNS(XSLT_NS, "transform")[0]
- || templateNode.getElementsByTagNameNS(XSLT_NS, "stylesheet")[0];
- }
- // XXX Make sure the template is a valid XSL transform sheet.
- },
-
- generateMicrosummary: function MSD_generateMicrosummary(pageContent) {
- if (this.content)
- return this.content.replace(/^\s+|\s+$/g, "");
- else if (this.template)
- return this._processTemplate(pageContent);
- else
- throw("generateMicrosummary called on uninitialized microsummary generator");
- },
-
- _processTemplate: function MSD__processTemplate(doc) {
- LOG("processing template " + this.template + " against document " + doc);
-
- // XXX Should we just have one global instance of the processor?
- var processor = Cc["@mozilla.org/document-transformer;1?type=xslt"].
- createInstance(Ci.nsIXSLTProcessor);
-
- // Turn off document loading of all kinds (document(), <include>, <import>)
- // for security (otherwise local generators would be able to load local files).
- processor.flags |= Ci.nsIXSLTProcessorPrivate.DISABLE_ALL_LOADS;
-
- processor.importStylesheet(this.template);
- var fragment = processor.transformToFragment(doc, doc);
-
- LOG("template processing result: " + fragment.textContent);
-
- // XXX When we support HTML microsummaries we'll need to do something
- // more sophisticated than just returning the text content of the fragment.
- return fragment.textContent;
- }
- };
-
-
-
-
-
- // Microsummary sets are collections of microsummaries. They allow callers
- // to register themselves as observers of the set, and when any microsummary
- // in the set changes, the observers get notified. Thus a caller can observe
- // the set instead of each individual microsummary.
-
- function MicrosummarySet() {
- this._observers = [];
- this._elements = [];
- }
-
- MicrosummarySet.prototype = {
-
- // IO Service
- __ios: null,
- get _ios() {
- if (!this.__ios)
- this.__ios = Cc["@mozilla.org/network/io-service;1"].
- getService(Ci.nsIIOService);
- return this.__ios;
- },
-
- interfaces: [Ci.nsIMicrosummarySet,
- Ci.nsIMicrosummaryObserver,
- Ci.nsISupports],
-
- QueryInterface: function (iid) {
- //if (!this.interfaces.some( function(v) { return iid.equals(v) } ))
- if (!iid.equals(Ci.nsIMicrosummarySet) &&
- !iid.equals(Ci.nsIMicrosummaryObserver) &&
- !iid.equals(Ci.nsISupports))
- throw Components.results.NS_ERROR_NO_INTERFACE;
- return this;
- },
-
- _observers: null,
- _elements: null,
-
- // nsIMicrosummaryObserver
-
- onContentLoaded: function MSSet_onContentLoaded(microsummary) {
- for ( var i = 0; i < this._observers.length; i++ )
- this._observers[i].onContentLoaded(microsummary);
- },
-
- // nsIMicrosummarySet
-
- addObserver: function MSSet_addObserver(observer) {
- if (this._observers.length == 0) {
- for ( var i = 0 ; i < this._elements.length ; i++ )
- this._elements[i].addObserver(this);
- }
-
- // Register the observer, but only if it isn't already registered,
- // so that we don't call the same observer twice for any given change.
- if (this._observers.indexOf(observer) == -1)
- this._observers.push(observer);
- },
-
- removeObserver: function MSSet_removeObserver(observer) {
- //NS_ASSERT(this._observers.indexOf(observer) != -1,
- // "can't remove microsummary observer " + observer + ": not registered");
-
- //this._observers =
- // this._observers.filter(function(i) { observer != i });
- if (this._observers.indexOf(observer) != -1)
- this._observers.splice(this._observers.indexOf(observer), 1);
-
- if (this._observers.length == 0) {
- for ( var i = 0 ; i < this._elements.length ; i++ )
- this._elements[i].removeObserver(this);
- }
- },
-
- extractFromPage: function MSSet_extractFromPage(resource) {
- if (!resource.isXML && resource.contentType != "text/html")
- throw("page is neither HTML nor XML");
-
- // XXX Handle XML documents, whose microsummaries are specified
- // via processing instructions.
-
- var links = resource.content.getElementsByTagName("LINK");
- for ( var i = 0; i < links.length; i++ ) {
- var link = links[i];
-
- if (link.getAttribute("rel") != "microsummary")
- continue;
-
- // Unlike the "href" attribute, the "href" property contains
- // an absolute URI spec, so we use it here to create the URI.
- var generatorURI = this._ios.newURI(link.href,
- resource.content.characterSet,
- null);
-
- try {
- const securityManager = Cc["@mozilla.org/scriptsecuritymanager;1"].
- getService(Ci.nsIScriptSecurityManager);
- securityManager.checkLoadURI(resource.uri,
- generatorURI,
- Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT);
- }
- catch(e) {
- LOG("can't load generator " + generatorURI.spec + " from page " +
- resource.uri.spec + ": " + e);
- continue;
- }
-
- var microsummary = new Microsummary(resource.uri, generatorURI);
- this.AppendElement(microsummary);
- }
- },
-
- // XXX Turn this into a complete implementation of nsICollection?
- AppendElement: function MSSet_AppendElement(element) {
- // Query the element to a microsummary.
- // XXX Should we NS_ASSERT if this fails?
- element = element.QueryInterface(Ci.nsIMicrosummary);
-
- if (this._elements.indexOf(element) == -1) {
- this._elements.push(element);
- element.addObserver(this);
- }
-
- // Notify observers that an element has been appended.
- for ( var i = 0; i < this._observers.length; i++ )
- this._observers[i].onElementAppended(element);
- },
-
- Enumerate: function MSSet_Enumerate() {
- return new ArrayEnumerator(this._elements);
- }
- };
-
-
-
-
-
- /**
- * An enumeration of items in a JS array.
- * @constructor
- */
- function ArrayEnumerator(aItems) {
- this._index = 0;
- if (aItems) {
- for (var i = 0; i < aItems.length; ++i) {
- if (!aItems[i])
- aItems.splice(i, 1);
- }
- }
- this._contents = aItems;
- }
-
- ArrayEnumerator.prototype = {
- interfaces: [Ci.nsISimpleEnumerator, Ci.nsISupports],
-
- QueryInterface: function (iid) {
- //if (!this.interfaces.some( function(v) { return iid.equals(v) } ))
- if (!iid.equals(Ci.nsISimpleEnumerator) &&
- !iid.equals(Ci.nsISupports))
- throw Components.results.NS_ERROR_NO_INTERFACE;
- return this;
- },
-
- _index: 0,
- _contents: [],
-
- hasMoreElements: function() {
- return this._index < this._contents.length;
- },
-
- getNext: function() {
- return this._contents[this._index++];
- }
- };
-
-
-
-
-
- function LOG(str) {
- dump(str + "\n");
- //var css = Cc['@mozilla.org/consoleservice;1'].
- // getService(Ci.nsIConsoleService);
- //css.logStringMessage("MsS: " + str)
- }
-
-
-
-
-
- /**
- * A resource (page, microsummary, generator, etc.) identifiable by URI.
- * This object abstracts away much of the code for loading resources
- * and parsing their content if they are XML or HTML.
- *
- * @constructor
- *
- * @param uri
- * the location of the resource
- *
- */
- function MicrosummaryResource(uri) {
- // Make sure we're not loading javascript: or data: URLs, which could
- // take advantage of the load to run code with chrome: privileges.
- // XXX Perhaps use nsIScriptSecurityManager.checkLoadURI instead.
- if (uri.scheme != "http" && uri.scheme != "https" && uri.scheme != "file")
- throw NS_ERROR_DOM_BAD_URI;
-
- this._uri = uri;
- }
-
- MicrosummaryResource.prototype = {
- // IO Service
- __ios: null,
- get _ios() {
- if (!this.__ios)
- this.__ios = Cc["@mozilla.org/network/io-service;1"].
- getService(Ci.nsIIOService);
- return this.__ios;
- },
-
- _uri: null,
- get uri() {
- return this._uri;
- },
-
- _content: null,
- get content() {
- return this._content;
- },
-
- _contentType: null,
- get contentType() {
- return this._contentType;
- },
-
- _isXML: false,
- get isXML() {
- return this._isXML;
- },
-
- // A function to call when we finish loading/parsing the resource.
- _callback: null,
-
- // A hidden iframe to parse HTML content.
- _iframe: null,
-
- /**
- * Initialize the resource from an existing DOM document object.
- *
- * @param document
- * a DOM document object
- *
- */
- initFromDocument: function MSR_initFromDocument(document) {
- this._content = document;
- this._contentType = document.contentType;
-
- // Normally we set this property based on whether or not
- // XMLHttpRequest parsed the content into an XML document object,
- // but since we already have the content, we have to analyze
- // its content type ourselves to see if it is XML.
- this._isXML = (this.contentType == "text/xml" ||
- this.contentType == "application/xml" ||
- /^.+\/.+\+xml$/.test(this.contentType));
- },
-
- /**
- * Destroy references to avoid leak-causing cycles. Instantiators must call
- * this method on all instances they instantiate once they're done with them.
- *
- */
- destroy: function MSR_destroy() {
- this._uri = null;
- this._content = null;
- this._callback = null;
- if (this._iframe) {
- if (this._iframe && this._iframe.parentNode)
- this._iframe.parentNode.removeChild(this._iframe);
- this._iframe = null;
- }
- },
-
- /**
- * Load the resource.
- *
- * @param callback
- * a function to invoke when the resource finishes loading
- *
- */
- load: function MSR_load(callback) {
- LOG(this.uri.spec + " loading");
-
- this._callback = callback;
-
- var request = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance();
-
- var loadHandler = {
- _self: this,
- handleEvent: function MSR_loadHandler_handleEvent(event) {
- event.target.removeEventListener("load", this, false);
- try { this._self._handleLoad(event) }
- finally { this._self = null }
- }
- };
-
- request = request.QueryInterface(Ci.nsIDOMEventTarget);
- request.addEventListener("load", loadHandler, false);
-
- request = request.QueryInterface(Ci.nsIXMLHttpRequest);
- request.open("GET", this.uri.spec, true);
- request.send(null);
- },
-
- _handleLoad: function MSR__handleLoad(event) {
- var request = event.target;
-
- if (request.responseXML) {
- this._isXML = true;
- // XXX Figure out the parsererror format and log a specific error.
- if (request.responseXML.documentElement.nodeName == "parsererror")
- throw(request.channel.originalURI.spec + " contains invalid XML");
- this._content = request.responseXML;
- this._contentType = request.channel.contentType;
- this._callback(this);
- }
-
- else if (request.channel.contentType == "text/html") {
- this._parse(request.responseText);
- }
-
- else {
- // This catches text/plain as well as any other content types
- // not accounted for by the content type-specific code above.
- this._content = request.responseText;
- this._contentType = request.channel.contentType;
- this._callback(this);
- }
- },
-
- /**
- * Parse a string of HTML text. Used by _load() when it retrieves HTML.
- * We do this via hidden XUL iframes, which according to bz is the best way
- * to do it currently, since bug 102699 is hard to fix.
- *
- * @param htmlText
- * a string containing the HTML content
- *
- */
- _parse: function MSR__parse(htmlText) {
- // Find a window to stick our hidden iframe into.
- var windowMediator = Cc['@mozilla.org/appshell/window-mediator;1'].
- getService(Ci.nsIWindowMediator);
- var window = windowMediator.getMostRecentWindow("navigator:browser");
- // XXX We can use other windows, too, so perhaps we should try to get
- // some other window if there's no browser window open. Perhaps we should
- // even prefer other windows, since there's less chance of any browser
- // window machinery like throbbers treating our load like one initiated
- // by the user.
- if (!window)
- throw(this._uri.spec + " can't parse; no browser window");
- var document = window.document;
- var rootElement = document.documentElement;
-
- // Create an iframe, make it hidden, and secure it against untrusted content.
- this._iframe = document.createElement('iframe');
- this._iframe.setAttribute("collapsed", true);
- this._iframe.setAttribute("type", "content");
-
- // Insert the iframe into the window, creating the doc shell, then turn off
- // JavaScript and auth dialogs for security and turn off other things
- // to reduce network load.
- // XXX We should also turn off CSS.
- rootElement.appendChild(this._iframe);
- this._iframe.docShell.allowJavascript = false;
- this._iframe.docShell.allowAuth = false;
- this._iframe.docShell.allowPlugins = false;
- this._iframe.docShell.allowMetaRedirects = false;
- this._iframe.docShell.allowSubframes = false;
- this._iframe.docShell.allowImages = false;
-
- var parseHandler = {
- _self: this,
- handleEvent: function MSR_parseHandler_handleEvent(event) {
- // Appending a new iframe to a XUL window makes it immediately start
- // loading "about:blank", and we'll probably get notified about that
- // first, so make sure we check for that and drop it on the floor.
- if (event.originalTarget.location == "about:blank")
- return;
-
- event.target.removeEventListener("DOMContentLoaded", this, false);
- try { this._self._handleParse(event) }
- finally { this._self = null }
- }
- };
-
- // Convert the HTML text into an input stream.
- var converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].
- createInstance(Ci.nsIScriptableUnicodeConverter);
- converter.charset = "UTF-8";
- var stream = converter.convertToInputStream(htmlText);
-
- // Set up a channel to load the input stream.
- var channel = Cc["@mozilla.org/network/input-stream-channel;1"].
- createInstance(Ci.nsIInputStreamChannel);
- channel.setURI(this._uri);
- channel.contentStream = stream;
-
- // Load in the background so we don't trigger web progress listeners.
- var request = channel.QueryInterface(Ci.nsIRequest);
- request.loadFlags |= Ci.nsIRequest.LOAD_BACKGROUND;
-
- // Specify the content type since we're not loading content from a server,
- // so it won't get specified for us, and if we don't specify it ourselves,
- // then Firefox will prompt the user to download content of "unknown type".
- var baseChannel = channel.QueryInterface(Ci.nsIChannel);
- baseChannel.contentType = "text/html";
-
- // Load as UTF-8, which it'll always be, because XMLHttpRequest converts
- // the text (i.e. XMLHTTPRequest.responseText) from its original charset
- // to UTF-16, then the string input stream component converts it to UTF-8.
- baseChannel.contentCharset = "UTF-8";
-
- // Register the parse handler as a load event listener and start the load.
- // Listen for "DOMContentLoaded" instead of "load" because background loads
- // don't fire "load" events.
- this._iframe.addEventListener("DOMContentLoaded", parseHandler, true);
- var uriLoader = Cc["@mozilla.org/uriloader;1"].getService(Ci.nsIURILoader);
- uriLoader.openURI(channel, true, this._iframe.docShell);
- },
-
- /**
- * Handle a load event for the iframe-based parser.
- *
- * @param event
- * the event object representing the load event
- *
- */
- _handleParse: function MSR__handleParse(event) {
- // XXX Make sure the parse was successful?
-
- this._content = this._iframe.contentDocument;
- this._contentType = this._iframe.contentDocument.contentType;
- this._callback(this);
- }
-
- };
-
- /**
- * Get a resource currently loaded into a browser window. Checks windows
- * one at a time, starting with the frontmost (a.k.a. most recent) one.
- *
- * @param uri
- * the URI of the resource
- *
- * @returns a Resource object, if the resource is currently loaded
- * into a browser window; otherwise null
- *
- */
- function getLoadedMicrosummaryResource(uri) {
- var mediator = Cc["@mozilla.org/appshell/window-mediator;1"].
- getService(Ci.nsIWindowMediator);
-
- // Apparently the Z order enumerator is broken on Linux per bug 156333.
- //var windows = mediator.getZOrderDOMWindowEnumerator("navigator:browser", true);
- var windows = mediator.getEnumerator("navigator:browser");
-
- while (windows.hasMoreElements()) {
- var win = windows.getNext();
- var tabBrowser = win.document.getElementById("content");
- for ( var i = 0; i < tabBrowser.browsers.length; i++ ) {
- var browser = tabBrowser.browsers[i];
- if (uri.equals(browser.currentURI)) {
- var resource = new MicrosummaryResource(uri);
- resource.initFromDocument(browser.contentDocument);
- return resource;
- }
- }
- }
-
- return null;
- }
-
-
-
-
-
- // From http://lxr.mozilla.org/mozilla/source/browser/components/search/nsSearchService.js
-
- /**
- * Removes all characters not in the "chars" string from aName.
- *
- * @returns a sanitized name to be used as a filename, or a random name
- * if a sanitized name cannot be obtained (if aName contains
- * no valid characters).
- */
- function sanitizeName(aName) {
- const chars = "-abcdefghijklmnopqrstuvwxyz0123456789";
-
- var name = aName.toLowerCase();
- name = name.replace(/ /g, "-");
- //name = name.split("").filter(function (el) {
- // return chars.indexOf(el) != -1;
- // }).join("");
- var filteredName = "";
- for ( var i = 0 ; i < name.length ; i++ )
- if (chars.indexOf(name[i]) != -1)
- filteredName += name[i];
- name = filteredName;
-
- if (!name) {
- // Our input had no valid characters - use a random name
- for (var i = 0; i < 8; ++i)
- name += chars.charAt(Math.round(Math.random() * (chars.length - 1)));
- }
-
- return name;
- }
-
-
-
-
-
- var gModule = {
- registerSelf: function(componentManager, fileSpec, location, type) {
- componentManager = componentManager.QueryInterface(Ci.nsIComponentRegistrar);
-
- for (var key in this._objects) {
- var obj = this._objects[key];
- componentManager.registerFactoryLocation(obj.CID,
- obj.className,
- obj.contractID,
- fileSpec,
- location,
- type);
- }
- },
-
- unregisterSelf: function(componentManager, fileSpec, location) {},
-
- getClassObject: function(componentManager, cid, iid) {
- if (!iid.equals(Components.interfaces.nsIFactory))
- throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
-
- for (var key in this._objects) {
- if (cid.equals(this._objects[key].CID))
- return this._objects[key].factory;
- }
-
- throw Components.results.NS_ERROR_NO_INTERFACE;
- },
-
- _objects: {
- service: {
- CID : Components.ID("{460a9792-b154-4f26-a922-0f653e2c8f91}"),
- contractID : "@mozilla.org/microsummary/service;1",
- className : "Microsummary Service",
- factory : MicrosummaryServiceFactory = {
- createInstance: function(aOuter, aIID) {
- if (aOuter != null)
- throw Components.results.NS_ERROR_NO_AGGREGATION;
- var svc = new MicrosummaryService();
- svc._init();
- return svc.QueryInterface(aIID);
- }
- }
- }
- },
-
- canUnload: function(componentManager) {
- return true;
- }
- };
-
- function NSGetModule(compMgr, fileSpec) {
- return gModule;
- }
-