/**
* Scrollable.js
*
* Released under LGPL License.
* Copyright (c) 1999-2015 Ephox Corp. All rights reserved
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/**
* This mixin makes controls scrollable using custom scrollbars.
*
* @-x-less Scrollable.less
* @mixin tinymce.ui.Scrollable
*/
define("tinymce/ui/Scrollable", [
"tinymce/dom/DomQuery",
"tinymce/ui/DragHelper"
], function($, DragHelper) {
"use strict";
return {
init: function() {
var self = this;
self.on('repaint', self.renderScroll);
},
renderScroll: function() {
var self = this, margin = 2;
function repaintScroll() {
var hasScrollH, hasScrollV, bodyElm;
function repaintAxis(axisName, posName, sizeName, contentSizeName, hasScroll, ax) {
var containerElm, scrollBarElm, scrollThumbElm;
var containerSize, scrollSize, ratio, rect;
var posNameLower, sizeNameLower;
scrollBarElm = self.getEl('scroll' + axisName);
if (scrollBarElm) {
posNameLower = posName.toLowerCase();
sizeNameLower = sizeName.toLowerCase();
$(self.getEl('absend')).css(posNameLower, self.layoutRect()[contentSizeName] - 1);
if (!hasScroll) {
$(scrollBarElm).css('display', 'none');
return;
}
$(scrollBarElm).css('display', 'block');
containerElm = self.getEl('body');
scrollThumbElm = self.getEl('scroll' + axisName + "t");
containerSize = containerElm["client" + sizeName] - (margin * 2);
containerSize -= hasScrollH && hasScrollV ? scrollBarElm["client" + ax] : 0;
scrollSize = containerElm["scroll" + sizeName];
ratio = containerSize / scrollSize;
rect = {};
rect[posNameLower] = containerElm["offset" + posName] + margin;
rect[sizeNameLower] = containerSize;
$(scrollBarElm).css(rect);
rect = {};
rect[posNameLower] = containerElm["scroll" + posName] * ratio;
rect[sizeNameLower] = containerSize * ratio;
$(scrollThumbElm).css(rect);
}
}
bodyElm = self.getEl('body');
hasScrollH = bodyElm.scrollWidth > bodyElm.clientWidth;
hasScrollV = bodyElm.scrollHeight > bodyElm.clientHeight;
repaintAxis("h", "Left", "Width", "contentW", hasScrollH, "Height");
repaintAxis("v", "Top", "Height", "contentH", hasScrollV, "Width");
}
function addScroll() {
function addScrollAxis(axisName, posName, sizeName, deltaPosName, ax) {
var scrollStart, axisId = self._id + '-scroll' + axisName, prefix = self.classPrefix;
$(self.getEl()).append(
'<div id="' + axisId + '" class="' + prefix + 'scrollbar ' + prefix + 'scrollbar-' + axisName + '">' +
'<div id="' + axisId + 't" class="' + prefix + 'scrollbar-thumb"></div>' +
'</div>'
);
self.draghelper = new DragHelper(axisId + 't', {
start: function() {
scrollStart = self.getEl('body')["scroll" + posName];
$('#' + axisId).addClass(prefix + 'active');
},
drag: function(e) {
var ratio, hasScrollH, hasScrollV, containerSize, layoutRect = self.layoutRect();
hasScrollH = layoutRect.contentW > layoutRect.innerW;
hasScrollV = layoutRect.contentH > layoutRect.innerH;
containerSize = self.getEl('body')["client" + sizeName] - (margin * 2);
containerSize -= hasScrollH && hasScrollV ? self.getEl('scroll' + axisName)["client" + ax] : 0;
ratio = containerSize / self.getEl('body')["scroll" + sizeName];
self.getEl('body')["scroll" + posName] = scrollStart + (e["delta" + deltaPosName] / ratio);
},
stop: function() {
$('#' + axisId).removeClass(prefix + 'active');
}
});
}
self.classes.add('scroll');
addScrollAxis("v", "Top", "Height", "Y", "Width");
addScrollAxis("h", "Left", "Width", "X", "Height");
}
if (self.settings.autoScroll) {
if (!self._hasScroll) {
self._hasScroll = true;
addScroll();
self.on('wheel', function(e) {
var bodyEl = self.getEl('body');
bodyEl.scrollLeft += (e.deltaX || 0) * 10;
bodyEl.scrollTop += e.deltaY * 10;
repaintScroll();
});
$(self.getEl('body')).on("scroll", repaintScroll);
}
repaintScroll();
}
}
};
});
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