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/**
* DragHelper.js
*
* Copyright, Moxiecode Systems AB
* Released under LGPL License.
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/**
* Drag/drop helper class.
*
* @example
* var dragHelper = new tinymce.ui.DragHelper('mydiv', {
* start: function(evt) {
* },
*
* drag: function(evt) {
* },
*
* end: function(evt) {
* }
* });
*
* @class tinymce.ui.DragHelper
*/
define("tinymce/ui/DragHelper", [
"tinymce/ui/DomUtils"
], function(DomUtils) {
"use strict";
function getDocumentSize() {
var doc = document, documentElement, body, scrollWidth, clientWidth;
var offsetWidth, scrollHeight, clientHeight, offsetHeight, max = Math.max;
documentElement = doc.documentElement;
body = doc.body;
scrollWidth = max(documentElement.scrollWidth, body.scrollWidth);
clientWidth = max(documentElement.clientWidth, body.clientWidth);
offsetWidth = max(documentElement.offsetWidth, body.offsetWidth);
scrollHeight = max(documentElement.scrollHeight, body.scrollHeight);
clientHeight = max(documentElement.clientHeight, body.clientHeight);
offsetHeight = max(documentElement.offsetHeight, body.offsetHeight);
return {
width: scrollWidth < offsetWidth ? clientWidth : scrollWidth,
height: scrollHeight < offsetHeight ? clientHeight : scrollHeight
};
}
return function(id, settings) {
var eventOverlayElm, doc = document, downButton, start, stop, drag, startX, startY;
settings = settings || {};
function getHandleElm() {
return doc.getElementById(settings.handle || id);
}
start = function(e) {
var docSize = getDocumentSize(), handleElm, cursor;
e.preventDefault();
downButton = e.button;
handleElm = getHandleElm();
startX = e.screenX;
startY = e.screenY;
// Grab cursor from handle
if (window.getComputedStyle) {
cursor = window.getComputedStyle(handleElm, null).getPropertyValue("cursor");
} else {
cursor = handleElm.runtimeStyle.cursor;
}
// Create event overlay and add it to document
eventOverlayElm = doc.createElement('div');
DomUtils.css(eventOverlayElm, {
position: "absolute",
top: 0, left: 0,
width: docSize.width,
height: docSize.height,
zIndex: 0x7FFFFFFF,
opacity: 0.0001,
cursor: cursor
});
doc.body.appendChild(eventOverlayElm);
// Bind mouse events
DomUtils.on(doc, 'mousemove', drag);
DomUtils.on(doc, 'mouseup', stop);
// Begin drag
settings.start(e);
};
drag = function(e) {
if (e.button !== downButton) {
return stop(e);
}
e.deltaX = e.screenX - startX;
e.deltaY = e.screenY - startY;
e.preventDefault();
settings.drag(e);
};
stop = function(e) {
DomUtils.off(doc, 'mousemove', drag);
DomUtils.off(doc, 'mouseup', stop);
eventOverlayElm.parentNode.removeChild(eventOverlayElm);
if (settings.stop) {
settings.stop(e);
}
};
/**
* Destroys the drag/drop helper instance.
*
* @method destroy
*/
this.destroy = function() {
DomUtils.off(getHandleElm());
};
DomUtils.on(getHandleElm(), 'mousedown', start);
};
});