treestyletab/modules/browserUIShowHideObserver.js
2015-10-26 16:32:31 +09:00

181 lines
6.0 KiB
JavaScript

/* ***** 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 YUKI "Piro" Hiroshi.
* Portions created by the Initial Developer are Copyright (C) 2014-2015
* the Initial Developer. All Rights Reserved.
*
* Contributor(s): YUKI "Piro" Hiroshi <piro.outsider.reflex@gmail.com>
* Infocatcher <https://github.com/Infocatcher>
*
* 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 ******/
var EXPORTED_SYMBOLS = ['BrowserUIShowHideObserver'];
Components.utils.import('resource://treestyletab-modules/constants.js');
function BrowserUIShowHideObserver(aOwner, aBox) {
this.owner = aOwner;
this.box = aBox;
this.init();
}
BrowserUIShowHideObserver.prototype = {
get MutationObserver()
{
var w = this.box.ownerDocument.defaultView;
return w.MutationObserver || w.MozMutationObserver;
},
init : function BrowserUIShowHideObserver_onInit()
{
if (!this.MutationObserver)
return;
this.observer = new this.MutationObserver((function(aMutations, aObserver) {
this.onMutation(aMutations, aObserver);
}).bind(this));
this.observer.observe(this.box, {
childList : true,
attributes : true,
subtree : true,
attributeOldValue: utils.isDebugging('browserUIShowHideObserver'),
attributeFilter : [
'hidden',
'collapsed',
'moz-collapsed', // Used in full screen mode
'disablechrome',
'width',
'height'
]
});
},
onMutation : function BrowserUIShowHideObserver_onMutation(aMutations, aObserver)
{
aMutations.forEach(function(aMutation) {
switch (aMutation.type)
{
case 'childList':
if (aMutation.target == this.box)
this.owner.browser.treeStyleTab.updateFloatingTabbar(TreeStyleTabConstants.kTABBAR_UPDATE_BY_WINDOW_RESIZE);
return;
case 'attributes':
this.onAttributeModified(aMutation, aObserver);
return;
}
}, this);
},
destroy : function BrowserUIShowHideObserver_destroy()
{
if (this.observer) {
this.observer.disconnect();
delete this.observer;
}
delete this.box;
delete this.owner;
},
onAttributeModified : function BrowserUIShowHideObserver_onAttributeModified(aMutation, aObserver)
{
if (this.handlingAttrChange)
return;
var target = aMutation.target;
var state = this.serializeBoxState(target);
if (target.__treestyletab_mutationObserver_lastState == state)
return;
var TST = this.owner.browser.treeStyleTab;
if (
// ignore modifications of each tab
TST.getTabFromChild(target) ||
// ignore modifications in the location bar (ex. identity icon)
TST.evaluateXPath(
'ancestor-or-self::xul:textbox',
target,
Components.interfaces.nsIDOMXPathResult.FIRST_ORDERED_NODE_TYPE
).singleNodeValue
)
return;
var toolbarVisible = !TST.ownerToolbar.collapsed;
var tabbarVisible = this.owner.browser.tabContainer.visible;
var placeHolderVisible = !TST.tabStripPlaceHolder.collapsed;
var tabbarVisibilityMismatching = (
toolbarVisible != placeHolderVisible ||
tabbarVisible != placeHolderVisible
);
if (
// I must ignore show/hide of elements managed by TST,
// to avoid infinity loop.
TST.evaluateXPath(
'ancestor-or-self::xul:*[@' + TreeStyleTabConstants.kTAB_STRIP_ELEMENT + '="true"]',
target,
Components.interfaces.nsIDOMXPathResult.FIRST_ORDERED_NODE_TYPE
).singleNodeValue &&
// However, I have to synchronize visibility of the real
// tab bar and the placeholder's one. If they have
// different visibility, then the tab bar is shown or
// hidden by "auto hide tab bar" feature of someone
// (Pale Moon, Tab Mix Plus, etc.)
!tabbarVisibilityMismatching
)
return;
if (utils.isDebugging('browserUIShowHideObserver')) {
dump('BrowserUIShowHideObserver_onAttributeModified ' +
target.localName + '#' + target.id + '.' + target.className + ', ' +
aMutation.attributeName + ', ' +
aMutation.oldValue + ' => ' +
target.getAttribute(aMutation.attributeName) + '\n');
}
this.handlingAttrChange = true;
TST.updateFloatingTabbar(TreeStyleTabConstants.kTABBAR_UPDATE_BY_WINDOW_RESIZE);
var w = this.box.ownerDocument.defaultView;
w.setTimeout((function() {
target.__treestyletab_mutationObserver_lastState = this.serializeBoxState(target);
this.handlingAttrChange = false;
}).bind(this), 10);
},
serializeBoxState : function BrowserUIShowHideObserver_serializeBoxState(aElement)
{
aElement = aElement || this.box;
var box = aElement.boxObject || {}; // Some times there is no boxObject (ex. HTML element)
return JSON.stringify({
width : box.width || 0,
height : box.height || 0,
hidden : Boolean(aElement.hidden),
collapsed : Boolean(aElement.collapsed)
});
}
};