--- /dev/null
+/*
+html5slider - a JS implementation of <input type=range> for Firefox 4 and up
+https://github.com/fryn/html5slider
+
+Copyright (c) 2010-2011 Frank Yan, <http://frankyan.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+(function() {
+
+// test for native support
+var test = document.createElement('input');
+try {
+ test.type = 'range';
+ if (test.type == 'range')
+ return;
+} catch (e) {
+ return;
+}
+
+// test for required property support
+if (!document.mozSetImageElement || !('MozAppearance' in test.style))
+ return;
+
+var scale;
+var isMac = navigator.platform == 'MacIntel';
+var thumb = {
+ radius: isMac ? 9 : 6,
+ width: isMac ? 22 : 12,
+ height: isMac ? 16 : 20
+};
+var track = '-moz-linear-gradient(top, transparent ' + (isMac ?
+ '6px, #999 6px, #999 7px, #ccc 9px, #bbb 11px, #bbb 12px, transparent 12px' :
+ '9px, #999 9px, #bbb 10px, #fff 11px, transparent 11px') +
+ ', transparent)';
+var styles = {
+ 'min-width': thumb.width + 'px',
+ 'min-height': thumb.height + 'px',
+ 'max-height': thumb.height + 'px',
+ padding: 0,
+ border: 0,
+ 'border-radius': 0,
+ cursor: 'default',
+ 'text-indent': '-999999px' // -moz-user-select: none; breaks mouse capture
+};
+var onChange = document.createEvent('HTMLEvents');
+onChange.initEvent('change', true, false);
+
+if (document.readyState == 'loading')
+ document.addEventListener('DOMContentLoaded', initialize, true);
+else
+ initialize();
+
+function initialize() {
+ // create initial sliders
+ Array.forEach(document.querySelectorAll('input[type=range]'), transform);
+ // create sliders on-the-fly
+ document.addEventListener('DOMNodeInserted', onNodeInserted, true);
+}
+
+function onNodeInserted(e) {
+ check(e.target);
+ if (e.target.querySelectorAll)
+ Array.forEach(e.target.querySelectorAll('input'), check);
+}
+
+function check(input, async) {
+ if (input.localName != 'input' || input.type == 'range');
+ else if (input.getAttribute('type') == 'range')
+ transform(input);
+ else if (!async)
+ setTimeout(check, 0, input, true);
+}
+
+function transform(slider) {
+
+ var isValueSet, areAttrsSet, isChanged, isClick, prevValue, rawValue, prevX;
+ var min, max, step, range, value = slider.value;
+
+ // lazily create shared slider affordance
+ if (!scale) {
+ scale = document.body.appendChild(document.createElement('hr'));
+ style(scale, {
+ '-moz-appearance': isMac ? 'scale-horizontal' : 'scalethumb-horizontal',
+ display: 'block',
+ visibility: 'visible',
+ opacity: 1,
+ position: 'fixed',
+ top: '-999999px'
+ });
+ document.mozSetImageElement('__sliderthumb__', scale);
+ }
+
+ // reimplement value and type properties
+ var getValue = function() { return '' + value; };
+ var setValue = function setValue(val) {
+ value = '' + val;
+ isValueSet = true;
+ draw();
+ delete slider.value;
+ slider.value = value;
+ slider.__defineGetter__('value', getValue);
+ slider.__defineSetter__('value', setValue);
+ };
+ slider.__defineGetter__('value', getValue);
+ slider.__defineSetter__('value', setValue);
+ slider.__defineGetter__('type', function() { return 'range'; });
+
+ // sync properties with attributes
+ ['min', 'max', 'step'].forEach(function(prop) {
+ if (slider.hasAttribute(prop))
+ areAttrsSet = true;
+ slider.__defineGetter__(prop, function() {
+ return this.hasAttribute(prop) ? this.getAttribute(prop) : '';
+ });
+ slider.__defineSetter__(prop, function(val) {
+ val === null ? this.removeAttribute(prop) : this.setAttribute(prop, val);
+ });
+ });
+
+ // initialize slider
+ slider.readOnly = true;
+ style(slider, styles);
+ update();
+
+ slider.addEventListener('DOMAttrModified', function(e) {
+ // note that value attribute only sets initial value
+ if (e.attrName == 'value' && !isValueSet) {
+ value = e.newValue;
+ draw();
+ }
+ else if (~['min', 'max', 'step'].indexOf(e.attrName)) {
+ update();
+ areAttrsSet = true;
+ }
+ }, true);
+
+ slider.addEventListener('mousedown', onDragStart, true);
+ slider.addEventListener('keydown', onKeyDown, true);
+ slider.addEventListener('focus', onFocus, true);
+ slider.addEventListener('blur', onBlur, true);
+
+ function onDragStart(e) {
+ isClick = true;
+ setTimeout(function() { isClick = false; }, 0);
+ if (e.button || !range)
+ return;
+ var width = parseFloat(getComputedStyle(this, 0).width);
+ var multiplier = (width - thumb.width) / range;
+ if (!multiplier)
+ return;
+ // distance between click and center of thumb
+ var dev = e.clientX - this.getBoundingClientRect().left - thumb.width / 2 -
+ (value - min) * multiplier;
+ // if click was not on thumb, move thumb to click location
+ if (Math.abs(dev) > thumb.radius) {
+ isChanged = true;
+ this.value -= -dev / multiplier;
+ }
+ rawValue = value;
+ prevX = e.clientX;
+ this.addEventListener('mousemove', onDrag, true);
+ this.addEventListener('mouseup', onDragEnd, true);
+ }
+
+ function onDrag(e) {
+ var width = parseFloat(getComputedStyle(this, 0).width);
+ var multiplier = (width - thumb.width) / range;
+ if (!multiplier)
+ return;
+ rawValue += (e.clientX - prevX) / multiplier;
+ prevX = e.clientX;
+ isChanged = true;
+ this.value = rawValue;
+ }
+
+ function onDragEnd() {
+ this.removeEventListener('mousemove', onDrag, true);
+ this.removeEventListener('mouseup', onDragEnd, true);
+ }
+
+ function onKeyDown(e) {
+ if (e.keyCode > 36 && e.keyCode < 41) { // 37-40: left, up, right, down
+ onFocus.call(this);
+ isChanged = true;
+ this.value = value + (e.keyCode == 38 || e.keyCode == 39 ? step : -step);
+ }
+ }
+
+ function onFocus() {
+ if (!isClick)
+ this.style.boxShadow = !isMac ? '0 0 0 2px #fb0' :
+ '0 0 2px 1px -moz-mac-focusring, inset 0 0 1px -moz-mac-focusring';
+ }
+
+ function onBlur() {
+ this.style.boxShadow = '';
+ }
+
+ // determines whether value is valid number in attribute form
+ function isAttrNum(value) {
+ return !isNaN(value) && +value == parseFloat(value);
+ }
+
+ // validates min, max, and step attributes and redraws
+ function update() {
+ min = isAttrNum(slider.min) ? +slider.min : 0;
+ max = isAttrNum(slider.max) ? +slider.max : 100;
+ if (max < min)
+ max = min > 100 ? min : 100;
+ step = isAttrNum(slider.step) && slider.step > 0 ? +slider.step : 1;
+ range = max - min;
+ draw(true);
+ }
+
+ // recalculates value property
+ function calc() {
+ if (!isValueSet && !areAttrsSet)
+ value = slider.getAttribute('value');
+ if (!isAttrNum(value))
+ value = (min + max) / 2;;
+ // snap to step intervals (WebKit sometimes does not - bug?)
+ value = Math.round((value - min) / step) * step + min;
+ if (value < min)
+ value = min;
+ else if (value > max)
+ value = min + ~~(range / step) * step;
+ }
+
+ // renders slider using CSS background ;)
+ function draw(attrsModified) {
+ calc();
+ if (isChanged && value != prevValue)
+ slider.dispatchEvent(onChange);
+ isChanged = false;
+ if (!attrsModified && value == prevValue)
+ return;
+ prevValue = value;
+ var position = range ? (value - min) / range * 100 : 0;
+ var bg = '-moz-element(#__sliderthumb__) ' + position + '% no-repeat, ';
+ style(slider, { background: bg + track });
+ }
+
+}
+
+function style(element, styles) {
+ for (var prop in styles)
+ element.style.setProperty(prop, styles[prop], 'important');
+}
+
+})();
projects / mediagoblin.git / commitdiff