1 /* MIT/X Consortium License
3 * Copyright (c) 2011-2012 Stefan Bolte <portix@gmx.net>
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 MouseAutoScroll = (function() {
25 const SCROLL_ICON="transparent url(data:image/png;base64,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) no-repeat scroll center";
29 Math.sign = function(x) { return x >=0 ? 1 : -1; };
35 var cursorStyle = null;
36 function startTimer() {
37 timerId = window.setInterval(timer, 40);
39 function stopTimer () {
40 window.clearInterval(timerId);
45 var scrollY = (ev.y - y);
46 var scrollX = (ev.x - x);
48 && doc.documentElement.scrollHeight == (window.innerHeight + window.pageYOffset);
50 && doc.documentElement.scrollWidth == (window.innerWidth + window.pageXOffset);
51 var l = scrollX < 0 && window.pageXOffset == 0;
52 var t = scrollY < 0 && window.pageYOffset == 0;
53 var offX = Math.abs(scrollX) < OFFSET;
54 var offY = Math.abs(scrollY) < OFFSET;
56 && (( b && r ) || ( b && l) || ( b && offX )
57 || ( t && r ) || ( t && l) || ( t && offX )
58 || (offY && r) || (offY && l) )) {
62 window.scrollBy(scrollX - Math.sign(scrollX) * OFFSET,
63 scrollY - Math.sign(scrollY) * OFFSET);
66 function mouseMove (e) {
73 doc = e.target.ownerDocument;
74 if (window.innerHeight >= doc.documentElement.scrollHeight
75 && window.innerWidth >= doc.documentElement.scrollWidth) {
78 span = doc.createElement("div");
79 span.style.width = SIZE + "px";
80 span.style.height = SIZE + "px";
81 span.style.background = SCROLL_ICON;
82 span.style.left = e.x - (SIZE / 2) + "px";
83 span.style.top = e.y - (SIZE / 2) + "px";
84 span.style.position = "fixed";
85 span.style.fontSize = SIZE + "px";
86 span.style.opacity = 0.6;
87 cursorStyle = doc.defaultView.getComputedStyle(doc.body, null).cursor;
88 doc.body.style.cursor = "move";
89 doc.body.appendChild(span);
90 doc.addEventListener('mousemove', mouseMove, false);
94 doc.body.style.cursor = cursorStyle;
95 span.parentNode.removeChild(span);
96 doc.removeEventListener('mousemove', mouseMove, false);
103 function mouseUp (e) { /* Simulate click, click event does not work during scrolling */
104 if (Math.abs(e.x - x) < 5 && Math.abs(e.y - y) < 5) {
106 window.removeEventListener('mouseup', mouseUp, false);
109 function mouseDown (e) {
115 } else if (e.button == 1) {
119 else if (!t.hasAttribute("href")
120 && !t.hasAttribute("onmousedown")
121 && !(t.hasAttribute("onclick"))) {
124 window.addEventListener('mouseup', mouseUp, false);
128 window.addEventListener('mousedown', mouseDown, false);