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https://github.com/gyurix1968/guacamole-client.git
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119 lines
4.0 KiB
JavaScript
119 lines
4.0 KiB
JavaScript
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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var Guacamole = Guacamole || {};
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/**
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* A position in 2-D space.
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*
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* @constructor
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* @param {Guacamole.Position|object} [template={}]
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* The object whose properties should be copied within the new
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* Guacamole.Position.
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*/
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Guacamole.Position = function Position(template) {
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template = template || {};
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/**
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* The current X position, in pixels.
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*
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* @type {!number}
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* @default 0
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*/
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this.x = template.x || 0;
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/**
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* The current Y position, in pixels.
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*
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* @type {!number}
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* @default 0
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*/
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this.y = template.y || 0;
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/**
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* Assigns the position represented by the given element and
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* clientX/clientY coordinates. The clientX and clientY coordinates are
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* relative to the browser viewport and are commonly available within
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* JavaScript event objects. The final position is translated to
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* coordinates that are relative the given element.
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*
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* @param {!Element} element
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* The element the coordinates should be relative to.
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*
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* @param {!number} clientX
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* The viewport-relative X coordinate to translate.
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*
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* @param {!number} clientY
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* The viewport-relative Y coordinate to translate.
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*/
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this.fromClientPosition = function fromClientPosition(element, clientX, clientY) {
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this.x = clientX - element.offsetLeft;
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this.y = clientY - element.offsetTop;
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// This is all JUST so we can get the position within the element
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var parent = element.offsetParent;
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while (parent && !(parent === document.body)) {
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this.x -= parent.offsetLeft - parent.scrollLeft;
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this.y -= parent.offsetTop - parent.scrollTop;
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parent = parent.offsetParent;
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}
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// Element ultimately depends on positioning within document body,
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// take document scroll into account.
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if (parent) {
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var documentScrollLeft = document.body.scrollLeft || document.documentElement.scrollLeft;
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var documentScrollTop = document.body.scrollTop || document.documentElement.scrollTop;
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this.x -= parent.offsetLeft - documentScrollLeft;
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this.y -= parent.offsetTop - documentScrollTop;
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}
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};
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};
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/**
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* Returns a new {@link Guacamole.Position} representing the relative position
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* of the given clientX/clientY coordinates within the given element. The
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* clientX and clientY coordinates are relative to the browser viewport and are
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* commonly available within JavaScript event objects. The final position is
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* translated to coordinates that are relative the given element.
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*
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* @param {!Element} element
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* The element the coordinates should be relative to.
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*
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* @param {!number} clientX
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* The viewport-relative X coordinate to translate.
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*
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* @param {!number} clientY
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* The viewport-relative Y coordinate to translate.
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*
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* @returns {!Guacamole.Position}
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* A new Guacamole.Position representing the relative position of the given
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* client coordinates.
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*/
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Guacamole.Position.fromClientPosition = function fromClientPosition(element, clientX, clientY) {
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var position = new Guacamole.Position();
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position.fromClientPosition(element, clientX, clientY);
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return position;
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};
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