/usr/share/kde4/apps/plasma/dashboard/AppleClasses/AppleScrollArea.js is in plasma-scriptengine-webkit 4:4.11.8-0ubuntu6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright 2008 Stefan Buller <hikingpete@cain.afraid.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) version 3, or any
* later version accepted by the membership of KDE e.V. (or its
* successor approved by the membership of KDE e.V.), which shall
* act as a proxy defined in Section 6 of version 3 of the license.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
function AppleScrollArea(content) {
for (var i = 0; i < arguments.length; i++) {
this.addScrollbar(arguments[i]);
}
var that=this;
var handler=function(e) {
switch(e.which) {
case 37: //left
that.horizontalScrollTo(that.content.scrollLeft -
that.singlepressScrollPixels);
break;
case 38: //up
that.verticalScrollTo(that.content.scrollTop -
that.singlepressScrollPixels);
break;
case 39: //right
that.horizontalScrollTo(that.content.scrollLeft +
that.singlepressScrollPixels);
break;
case 40: //down
that.verticalScrollTo(that.content.scrollTop +
that.singlepressScrollPixels);
break;
default:
//the event may contiue to propagate
return true;
}
//arrest propagation
return false;
}
content.addEventListener('keydown',handler,false);
//Apple mandated properties that must be reacted to.
this.scrollsVertically = false;
this.scrollsHorizontally = false;
this.singlepressScrollPixels = 10; //Somebody change this. Please.
//Apple mandated properties that are `read only'.
this.viewHeight = content.clientHeight;
this.viewToContentHeightRatio = content.clientHeight / content.scrollHeight;
this.viewWidth = content.clientWidth;
this.viewToContentWidthRatio = content.clientWidth / content.scrollWidth;
//I'm worried that the scrollHeight/Width could change on me. If that turns
//out to be a problem, then getters would be the way to go.
//extras
this.scrollbars = [];
this.content = content;
}
AppleScrollArea.prototype.addScrollbar = function(scrollbar) {
this.scrollbars.push(scrollbar);
scrollbar.setScrollArea(this);
}
AppleScrollArea.prototype.removeScrollbar = function(scrollbar) {
this.scrollbars.filter(function(element){return (element === scrollbar);});
scrollbar.setScrollArea(null); //Just a guess. This might not be right.
}
AppleScrollArea.prototype.remove = function() {
//Remove the div, or remove the effects of AppleScrollArea?
//Perhaps this can all be replaced with a simple removeChild()
content.scrollTop = 0;
content.scrollLeft = 0;
for (var i = 0; i < this.scrollbars.length; i++) {
this.scrollbars[i].remove();
delete this.scrollbars[i];
}
delete this;
}
AppleScrollArea.prototype.reveal = function(element) {
//First we find it
var distX = 0;
var distY = 0;
var el = element;
while (el !== this.content) {
distX += (+el.offsetTop);
distY += (+el.offsetLeft);
el = el.parentNode;
if (el == null) {
throw "Target element not in ScrollArea.";
}
}
this.verticalScrollTo(distY);
this.horizontalScrollTo(distX);
}
AppleScrollArea.prototype.focus = function() {
this.content.focus();
}
AppleScrollArea.prototype.blur = function() {
this.content.blur();
}
AppleScrollArea.prototype.verticalScrollTo = function(position) {
this.scrollTop = position;
}
AppleScrollArea.prototype.horizontalScrollTo = function(position) {
this.scrollLeft = position;
}
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