Remove html5slider Javascript helper

This helper was originally added as a "polyfill"
(backward-compatibility shim) for Firefox version 23 and older, so
that <input type="range"> that audio.js uses could render nicely in
those versions of Firefox.

Chromium did not need this shim, and Firefox 23 (released on Aug 6,
2013) added support for this. Therefore, let us remove this
dependency. By current metrics at caniuse.com
<http://caniuse.com/#feat=input-range>, 88.14% of web users support
this attribute. Opera Mini and old versions of Internet Explorer (6-8)
are the only holdouts.

Note also that the html5slider.js is uninterested in adding this to
the npm package manager (or any package manager) repository
<https://github.com/fryn/html5slider/issues/5>, meaning that keeping
it in the mediagoblin extlib section would mean manual
maintenance/updating by the GNU MediaGoblin team.

This commit also removes GMG's use of the shim.

1 files changed, 0 insertions, 268 deletions

diff --git a/extlib/html5slider/html5slider.js b/extlib/html5slider/html5slider.js
deleted file mode 100644
index e69c3d2b..00000000
--- a/extlib/html5slider/html5slider.js
+++ /dev/null
@@ -1,268 +0,0 @@
-/*
-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');
-}
-
-})();