egroupware/api/js/webodf/collab/FullWindowZoomHelper.js

84 lines
3.1 KiB
JavaScript

/**
* Copyright (C) 2014 KO GmbH <copyright@kogmbh.com>
*
* @licstart
* This file is part of WebODF.
*
* WebODF is free software: you can redistribute it and/or modify it
* under the terms of the GNU Affero General Public License (GNU AGPL)
* as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* WebODF 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with WebODF. If not, see <http://www.gnu.org/licenses/>.
* @licend
*
* @source: http://www.webodf.org/
* @source: https://github.com/kogmbh/WebODF/
*/
/*global define, document, window */
webodfModule.define("webodf/editor/FullWindowZoomHelper", [], function () {
"use strict";
// fullscreen pinch-zoom adaption
var FullWindowZoomHelper = function FullWindowZoomHelper(toolbarContainerElement, canvasContainerElement) {
function translateToolbar() {
var y = document.body.scrollTop;
toolbarContainerElement.style.WebkitTransformOrigin = "center top";
toolbarContainerElement.style.WebkitTransform = 'translateY(' + y + 'px)';
}
function repositionContainer() {
canvasContainerElement.style.top = toolbarContainerElement.getBoundingClientRect().height + 'px';
}
this.destroy = function (callback) {
window.removeEventListener('scroll', translateToolbar);
window.removeEventListener('focusout', translateToolbar);
window.removeEventListener('touchmove', translateToolbar);
window.removeEventListener('resize', repositionContainer);
callback();
};
function init() {
var metaElement, toolbarStyle;
// prevent any zooming on the window TODO: do not overwrite any other existing content of viewport metadata
metaElement = document.createElement("meta");
metaElement.setAttribute("name", "viewport");
metaElement.setAttribute("content", "width=device-width, initial-scale=1.0, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0");
document.head.appendChild(metaElement);
// set the toolbar absolute and fixed to top
toolbarStyle = toolbarContainerElement.style;
toolbarStyle.top = 0;
toolbarStyle.left = 0;
toolbarStyle.right = 0;
toolbarStyle.position = "absolute";
toolbarStyle.zIndex = 5;
toolbarStyle.boxShadow = "0 1px 5px rgba(0, 0, 0, 0.25)";
repositionContainer();
window.addEventListener('scroll', translateToolbar);
window.addEventListener('focusout', translateToolbar);
window.addEventListener('touchmove', translateToolbar);
window.addEventListener('resize', repositionContainer);
}
init();
};
return FullWindowZoomHelper;
});