mirror of
https://github.com/overleaf/overleaf.git
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355 lines
11 KiB
JavaScript
Executable file
355 lines
11 KiB
JavaScript
Executable file
/* ***** BEGIN LICENSE BLOCK *****
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* Distributed under the BSD license:
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*
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* Copyright (c) 2010, Ajax.org B.V.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Ajax.org B.V. nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ***** END LICENSE BLOCK ***** */
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define(function(require, exports, module) {
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"use strict";
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var keys = require("./keys");
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var useragent = require("./useragent");
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var dom = require("./dom");
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exports.addListener = function(elem, type, callback) {
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if (elem.addEventListener) {
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return elem.addEventListener(type, callback, false);
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}
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if (elem.attachEvent) {
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var wrapper = function() {
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callback.call(elem, window.event);
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};
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callback._wrapper = wrapper;
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elem.attachEvent("on" + type, wrapper);
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}
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};
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exports.removeListener = function(elem, type, callback) {
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if (elem.removeEventListener) {
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return elem.removeEventListener(type, callback, false);
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}
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if (elem.detachEvent) {
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elem.detachEvent("on" + type, callback._wrapper || callback);
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}
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};
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/*
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* Prevents propagation and clobbers the default action of the passed event
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*/
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exports.stopEvent = function(e) {
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exports.stopPropagation(e);
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exports.preventDefault(e);
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return false;
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};
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exports.stopPropagation = function(e) {
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if (e.stopPropagation)
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e.stopPropagation();
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else
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e.cancelBubble = true;
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};
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exports.preventDefault = function(e) {
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if (e.preventDefault)
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e.preventDefault();
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else
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e.returnValue = false;
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};
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/*
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* @return {Number} 0 for left button, 1 for middle button, 2 for right button
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*/
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exports.getButton = function(e) {
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if (e.type == "dblclick")
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return 0;
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if (e.type == "contextmenu" || (e.ctrlKey && useragent.isMac))
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return 2;
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// DOM Event
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if (e.preventDefault) {
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return e.button;
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}
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// old IE
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else {
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return {1:0, 2:2, 4:1}[e.button];
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}
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};
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exports.capture = function(el, eventHandler, releaseCaptureHandler) {
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function onMouseUp(e) {
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eventHandler && eventHandler(e);
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releaseCaptureHandler && releaseCaptureHandler(e);
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exports.removeListener(document, "mousemove", eventHandler, true);
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exports.removeListener(document, "mouseup", onMouseUp, true);
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exports.removeListener(document, "dragstart", onMouseUp, true);
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}
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exports.addListener(document, "mousemove", eventHandler, true);
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exports.addListener(document, "mouseup", onMouseUp, true);
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exports.addListener(document, "dragstart", onMouseUp, true);
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return onMouseUp;
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};
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exports.addMouseWheelListener = function(el, callback) {
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if ("onmousewheel" in el) {
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var factor = 8;
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exports.addListener(el, "mousewheel", function(e) {
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if (e.wheelDeltaX !== undefined) {
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e.wheelX = -e.wheelDeltaX / factor;
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e.wheelY = -e.wheelDeltaY / factor;
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} else {
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e.wheelX = 0;
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e.wheelY = -e.wheelDelta / factor;
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}
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callback(e);
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});
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} else if ("onwheel" in el) {
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exports.addListener(el, "wheel", function(e) {
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e.wheelX = (e.deltaX || 0) * 5;
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e.wheelY = (e.deltaY || 0) * 5;
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callback(e);
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});
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} else {
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exports.addListener(el, "DOMMouseScroll", function(e) {
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if (e.axis && e.axis == e.HORIZONTAL_AXIS) {
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e.wheelX = (e.detail || 0) * 5;
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e.wheelY = 0;
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} else {
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e.wheelX = 0;
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e.wheelY = (e.detail || 0) * 5;
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}
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callback(e);
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});
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}
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};
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exports.addMultiMouseDownListener = function(el, timeouts, eventHandler, callbackName) {
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var clicks = 0;
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var startX, startY, timer;
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var eventNames = {
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2: "dblclick",
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3: "tripleclick",
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4: "quadclick"
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};
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exports.addListener(el, "mousedown", function(e) {
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if (exports.getButton(e) != 0) {
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clicks = 0;
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} else if (e.detail > 1) {
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clicks++;
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if (clicks > 4)
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clicks = 1;
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} else {
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clicks = 1;
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}
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if (useragent.isIE) {
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var isNewClick = Math.abs(e.clientX - startX) > 5 || Math.abs(e.clientY - startY) > 5;
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if (isNewClick) {
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clicks = 1;
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}
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if (clicks == 1) {
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startX = e.clientX;
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startY = e.clientY;
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}
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}
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eventHandler[callbackName]("mousedown", e);
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if (clicks > 4)
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clicks = 0;
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else if (clicks > 1)
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return eventHandler[callbackName](eventNames[clicks], e);
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});
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if (useragent.isOldIE) {
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exports.addListener(el, "dblclick", function(e) {
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clicks = 2;
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if (timer)
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clearTimeout(timer);
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timer = setTimeout(function() {timer = null}, timeouts[clicks - 1] || 600);
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eventHandler[callbackName]("mousedown", e);
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eventHandler[callbackName](eventNames[clicks], e);
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});
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}
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};
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function normalizeCommandKeys(callback, e, keyCode) {
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var hashId = 0;
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if ((useragent.isOpera && !("KeyboardEvent" in window)) && useragent.isMac) {
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hashId = 0 | (e.metaKey ? 1 : 0) | (e.altKey ? 2 : 0)
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| (e.shiftKey ? 4 : 0) | (e.ctrlKey ? 8 : 0);
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} else {
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hashId = 0 | (e.ctrlKey ? 1 : 0) | (e.altKey ? 2 : 0)
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| (e.shiftKey ? 4 : 0) | (e.metaKey ? 8 : 0);
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}
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if (!useragent.isMac && pressedKeys) {
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if (pressedKeys[91] || pressedKeys[92])
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hashId |= 8;
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if (pressedKeys.altGr) {
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if ((3 & hashId) != 3)
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pressedKeys.altGr = 0
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else
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return;
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}
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if (keyCode === 18 || keyCode === 17) {
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var location = e.location || e.keyLocation;
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if (keyCode === 17 && location === 1) {
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ts = e.timeStamp;
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} else if (keyCode === 18 && hashId === 3 && location === 2) {
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var dt = -ts;
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ts = e.timeStamp;
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dt += ts;
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if (dt < 3)
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pressedKeys.altGr = true;
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}
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}
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}
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if (keyCode in keys.MODIFIER_KEYS) {
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switch (keys.MODIFIER_KEYS[keyCode]) {
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case "Alt":
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hashId = 2;
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break;
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case "Shift":
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hashId = 4;
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break;
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case "Ctrl":
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hashId = 1;
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break;
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default:
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hashId = 8;
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break;
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}
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keyCode = 0;
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}
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if (hashId & 8 && (keyCode === 91 || keyCode === 93)) {
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keyCode = 0;
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}
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if (!hashId && keyCode === 13) {
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if (e.location || e.keyLocation === 3) {
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callback(e, hashId, -keyCode)
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if (e.defaultPrevented)
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return;
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}
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}
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// If there is no hashId and the keyCode is not a function key, then
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// we don't call the callback as we don't handle a command key here
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// (it's a normal key/character input).
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if (!hashId && !(keyCode in keys.FUNCTION_KEYS) && !(keyCode in keys.PRINTABLE_KEYS)) {
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return false;
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}
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return callback(e, hashId, keyCode);
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}
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var pressedKeys = null;
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var ts = 0;
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exports.addCommandKeyListener = function(el, callback) {
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var addListener = exports.addListener;
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if (useragent.isOldGecko || (useragent.isOpera && !("KeyboardEvent" in window))) {
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// Old versions of Gecko aka. Firefox < 4.0 didn't repeat the keydown
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// event if the user pressed the key for a longer time. Instead, the
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// keydown event was fired once and later on only the keypress event.
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// To emulate the 'right' keydown behavior, the keyCode of the initial
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// keyDown event is stored and in the following keypress events the
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// stores keyCode is used to emulate a keyDown event.
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var lastKeyDownKeyCode = null;
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addListener(el, "keydown", function(e) {
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lastKeyDownKeyCode = e.keyCode;
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});
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addListener(el, "keypress", function(e) {
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return normalizeCommandKeys(callback, e, lastKeyDownKeyCode);
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});
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} else {
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var lastDefaultPrevented = null;
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addListener(el, "keydown", function(e) {
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pressedKeys[e.keyCode] = true;
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var result = normalizeCommandKeys(callback, e, e.keyCode);
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lastDefaultPrevented = e.defaultPrevented;
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return result;
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});
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addListener(el, "keypress", function(e) {
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if (lastDefaultPrevented && (e.ctrlKey || e.altKey || e.shiftKey || e.metaKey)) {
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exports.stopEvent(e);
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lastDefaultPrevented = null;
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}
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});
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addListener(el, "keyup", function(e) {
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pressedKeys[e.keyCode] = null;
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});
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if (!pressedKeys) {
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pressedKeys = Object.create(null);
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addListener(window, "focus", function(e) {
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pressedKeys = Object.create(null);
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});
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}
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}
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};
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if (window.postMessage && !useragent.isOldIE) {
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var postMessageId = 1;
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exports.nextTick = function(callback, win) {
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win = win || window;
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var messageName = "zero-timeout-message-" + postMessageId;
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exports.addListener(win, "message", function listener(e) {
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if (e.data == messageName) {
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exports.stopPropagation(e);
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exports.removeListener(win, "message", listener);
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callback();
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}
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});
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win.postMessage(messageName, "*");
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};
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}
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exports.nextFrame = window.requestAnimationFrame ||
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window.mozRequestAnimationFrame ||
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window.webkitRequestAnimationFrame ||
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window.msRequestAnimationFrame ||
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window.oRequestAnimationFrame;
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if (exports.nextFrame)
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exports.nextFrame = exports.nextFrame.bind(window);
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else
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exports.nextFrame = function(callback) {
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setTimeout(callback, 17);
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};
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});
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