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tabdatastore.jsm
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tabdatastore.jsm
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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 the Tree Style Tab.
*
* The Initial Developer of the Original Code is
* SHIMODA Hiroshi.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* SHIMODA Hiroshi <[email protected]>
* Philipp von Weitershausen <[email protected]>
*
* 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 ******/
/**
* Persistently store tab attributes in the session store service.
*
* Heavily inspired by Tree Style Tab's TreeStyleTabUtils.
*/
const EXPORTED_SYMBOLS = ["VTTabDataStore", "VTTabIDs"];
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
var VTTabDataStore = {
getTabValue: function(aTab, aKey) {
let value = null;
try {
value = this.sessionStore.getTabValue(aTab, aKey);
} catch(ex) {
// Ignore
}
return value;
},
setTabValue: function(aTab, aKey, aValue) {
if (!aValue) {
this.deleteTabValue(aTab, aKey);
}
aTab.setAttribute(aKey, aValue);
try {
this.checkCachedSessionDataExpiration(aTab);
this.sessionStore.setTabValue(aTab, aKey, aValue);
} catch(ex) {
// Ignore
}
},
deleteTabValue: function(aTab, aKey) {
aTab.removeAttribute(aKey);
try {
this.checkCachedSessionDataExpiration(aTab);
this.sessionStore.setTabValue(aTab, aKey, "");
this.sessionStore.deleteTabValue(aTab, aKey);
} catch(ex) {
// Ignore
}
},
// workaround for http://piro.sakura.ne.jp/latest/blosxom/mozilla/extension/treestyletab/2009-09-29_debug.htm
checkCachedSessionDataExpiration: function(aTab) {
let data = aTab.linkedBrowser.__SS_data;
if (data &&
data._tabStillLoading &&
aTab.getAttribute("busy") != "true")
data._tabStillLoading = false;
}
};
XPCOMUtils.defineLazyServiceGetter(VTTabDataStore, "sessionStore",
"@mozilla.org/browser/sessionstore;1",
"nsISessionStore");
/*
* Assign tabs a persistent unique identifier.
*
* Necessary until https://bugzilla.mozilla.org/show_bug.cgi?id=529477
* is implemented.
*/
function VTTabIDs(tabs) {
this.tabs = tabs;
this.init();
}
VTTabIDs.prototype = {
init: function() {
const tabs = this.tabs;
tabs.VTTabIDs = this;
tabs.addEventListener("TabOpen", this, true);
tabs.addEventListener("SSTabRestoring", this, true);
for (let i=0; i < tabs.childNodes.length; i++) {
this.initTab(tabs.childNodes[i]);
}
},
unload: function unload() {
const tabs = this.tabs;
delete tabs.VTTabIDs;
tabs.removeEventListener("TabOpen", this, true);
tabs.removeEventListener("SSTabRestoring", this, true);
},
kId: "verticaltabs-id",
id: function(aTab) {
return aTab.getAttribute(this.kId);
},
get: function(aID) {
let elements = this.tabs.getElementsByAttribute(this.kId, aID);
return elements.length ? elements[0] : undefined;
},
/*** Event handlers ***/
handleEvent: function(aEvent) {
switch (aEvent.type) {
case "TabOpen":
this.initTab(aEvent.originalTarget);
return;
case "SSTabRestoring":
this.restoreTab(aEvent.originalTarget);
return;
}
},
makeNewId: function() {
return this.uuidGen.generateUUID().toString();
},
initTab: function(aTab) {
if (aTab.hasAttribute(this.kId)) {
return;
}
// Assign an ID. This may be temporary if the tab is being restored.
let id = VTTabDataStore.getTabValue(aTab, this.kId) || this.makeNewId();
VTTabDataStore.setTabValue(aTab, this.kId, id);
},
restoreTab: function(aTab) {
// Restore the original ID
let newId = VTTabDataStore.getTabValue(aTab, this.kId);
if (newId) {
aTab.setAttribute(this.kId, newId);
}
}
};
XPCOMUtils.defineLazyServiceGetter(VTTabIDs.prototype, "uuidGen",
"@mozilla.org/uuid-generator;1",
"nsIUUIDGenerator");