treestyletab/modules/tabpanelDNDObserver.js

163 lines
5.2 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 SHIMODA Hiroshi.
* Portions created by the Initial Developer are Copyright (C) 2010-2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s): SHIMODA Hiroshi <piro@p.club.ne.jp>
*
* 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 EXPORTED_SYMBOLS = ['TabpanelDNDObserver'];
const Cc = Components.classes;
const Ci = Components.interfaces;
function TabpanelDNDObserver(aTabBrowser)
{
this.init(aTabBrowser);
}
TabpanelDNDObserver.prototype = {
getDropPosition : function TabpanelDND_getDropPosition(aEvent)
{
var box = this.browser.boxObject;
var W = box.width;
var H = box.height;
var X = box.screenX;
var Y = box.screenY;
var x = aEvent.screenX - X;
var y = aEvent.screenY - Y;
if (x > (W * 0.33) &&
x < (W * 0.66) &&
y > (H * 0.33) &&
y < (H * 0.66))
return 'center';
var isTL = x <= W - (y * W / H);
var isBL = x <= y * W / H;
return (isTL && isBL) ? 'left' :
(isTL && !isBL) ? 'top' :
(!isTL && isBL) ? 'bottom' :
'right' ;
},
canDrop : function TabpanelDND_canDrop(aEvent)
{
var session = this.treeStyleTab.currentDragSession;
return !!(
session &&
session.isDataFlavorSupported(this.treeStyleTab.kDRAG_TYPE_TABBAR) &&
session.sourceNode
);
},
handleEvent : function TabpanelDND_handleEvent(aEvent)
{
// ignore drag and drop while toolbar customization (for Firefox 3.6)
if (this.treeStyleTab.isToolbarCustomizing)
return;
switch (aEvent.type)
{
case 'dragleave': return this.onDragLeave(aEvent);
case 'dragover': return this.onDragOver(aEvent);
case 'drop': return this.onDrop(aEvent);
}
},
onDragLeave : function TabpanelDND_onDragLeave(aEvent)
{
if (!this.canDrop(aEvent)) return;
var sv = this.treeStyleTab;
if (this.browser.hasAttribute(sv.kDROP_POSITION))
sv.setTabbrowserAttribute(sv.kDROP_POSITION, sv.kDROP_POSITION_UNKNOWN);
},
onDragOver : function TabpanelDND_onDragOver(aEvent)
{
if (!this.canDrop(aEvent)) return;
aEvent.preventDefault();
var sv = this.treeStyleTab;
sv.setTabbrowserAttribute(sv.kDROP_POSITION, this.getDropPosition(aEvent));
},
onDrop : function TabpanelDND_onDrop(aEvent)
{
if (!this.canDrop(aEvent)) return;
var sv = this.treeStyleTab;
var dt = aEvent.dataTransfer;
var position = this.getDropPosition(aEvent);
if (position != 'center' &&
position != sv.position) {
if (sv.getTreePref('tabbar.fixed.autoCancelOnDrop') &&
dt.getData(sv.kDRAG_TYPE_TABBAR) != sv.kTABBAR_MOVE_FORCE) {
let orient = (position == 'left' || position == 'right') ? 'vertical' : 'horizontal' ;
sv.setTreePref('tabbar.fixed.'+orient, false);
}
sv.setPrefForActiveWindow(function() {
sv.utils.position = position;
sv.position = position;
});
}
aEvent.preventDefault();
aEvent.stopPropagation();
},
init : function TabpanelDND_init(aTabBrowser)
{
this.browser = aTabBrowser;
this.document = aTabBrowser.ownerDocument;
this.window = this.document.defaultView;
this.treeStyleTab = aTabBrowser.treeStyleTab;
var b = this.treeStyleTab.mTabBrowser;
b.mPanelContainer.addEventListener('dragover', this, true);
b.mPanelContainer.addEventListener('dragleave', this, true);
b.mPanelContainer.addEventListener('drop', this, true);
},
destroy : function TabpanelDND_destroy()
{
var b = this.treeStyleTab.mTabBrowser;
b.mPanelContainer.removeEventListener('dragover', this, true);
b.mPanelContainer.removeEventListener('dragleave', this, true);
b.mPanelContainer.removeEventListener('drop', this, true);
delete this.treeStyleTab;
delete this.browser;
delete this.document;
delete this.window;
}
};