blob: c5e1cf13c2a1950850b05f33bc5aa0f071f7a09d [file] [log] [blame]
/*
* Copyright (C) 2016 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
class Slider extends LayoutNode
{
constructor(cssClassName = "", knobStyle = Slider.KnobStyle.Circle)
{
super(`<div class="slider ${cssClassName}"></div>`);
this._container = new LayoutNode(`<div class="custom-slider"></div>`);
this._primaryFill = new LayoutNode(`<div class="primary fill"></div>`);
this._trackFill = new LayoutNode(`<div class="track fill"></div>`);
this._secondaryFill = new LayoutNode(`<div class="secondary fill"></div>`);
this._knob = new LayoutNode(`<div class="knob ${knobStyle}"></div>`);
this._container.children = [this._primaryFill, this._trackFill, this._secondaryFill, this._knob];
this._input = new LayoutNode(`<input type="range" min="0" max="1" step="0.001" />`);
this._input.element.addEventListener("pointerdown", this);
this._input.element.addEventListener("input", this);
this._input.element.addEventListener("change", this);
this.value = 0;
this.height = 16;
this.enabled = true;
this.isActive = false;
this._secondaryValue = 0;
this._disabled = false;
this._knobStyle = knobStyle;
this.children = [this._container, this._input];
}
// Public
set inputAccessibleLabel(timeValue)
{
this._input.element.setAttribute("aria-valuetext", formattedStringForDuration(timeValue));
}
get disabled()
{
return this._disabled;
}
set disabled(flag)
{
if (this._disabled === flag)
return;
this._disabled = flag;
this.markDirtyProperty("disabled");
}
get value()
{
if (this._value !== undefined)
return this._value;
return parseFloat(this._input.element.value);
}
set value(value)
{
if (this.isActive)
return;
this._value = value;
this.markDirtyProperty("value");
this.needsLayout = true;
}
get secondaryValue()
{
return this._secondaryValue;
}
set secondaryValue(secondaryValue)
{
if (this._secondaryValue === secondaryValue)
return;
this._secondaryValue = secondaryValue;
this.needsLayout = true;
}
// Protected
handleEvent(event)
{
switch (event.type) {
case "pointerdown":
this._handlePointerdownEvent();
break;
case "pointerup":
this._handlePointerupEvent();
break;
case "change":
case "input":
this._valueDidChange();
break;
}
}
commitProperty(propertyName)
{
switch (propertyName) {
case "value":
this._input.element.value = this._value;
delete this._value;
break;
case "disabled":
this.element.classList.toggle("disabled", this._disabled);
break;
default :
super.commitProperty(propertyName);
break;
}
}
commit()
{
super.commit();
let scrubberWidth = (style => {
switch (style) {
case Slider.KnobStyle.Bar:
return 4;
case Slider.KnobStyle.Circle:
return 9;
case Slider.KnobStyle.None:
return 0;
}
console.error("Unknown Slider.KnobStyle");
return 0;
})(this._knobStyle);
let scrubberBorder = (style => {
switch (style) {
case Slider.KnobStyle.Bar:
return 1;
case Slider.KnobStyle.Circle:
return (-1 * scrubberWidth / 2);
case Slider.KnobStyle.None:
return 0;
}
console.error("Unknown Slider.KnobStyle");
return 0;
})(this._knobStyle);
let scrubberCenterX = (scrubberWidth / 2) + Math.round((this.width - scrubberWidth) * this.value);
this._primaryFill.element.style.width = `${scrubberCenterX - (scrubberWidth / 2) - scrubberBorder}px`;
this._trackFill.element.style.left = `${scrubberCenterX + (scrubberWidth / 2) + scrubberBorder}px`;
this._secondaryFill.element.style.left = `${scrubberCenterX + (scrubberWidth / 2) + scrubberBorder}px`;
this._secondaryFill.element.style.right = `${(1 - this._secondaryValue) * 100}%`;
this._knob.element.style.left = `${scrubberCenterX}px`;
}
// Private
_handlePointerdownEvent()
{
this._pointerupTarget = this._interactionEndTarget();
this._pointerupTarget.addEventListener("pointerup", this, true);
this._valueWillStartChanging();
}
_interactionEndTarget()
{
const mediaControls = this.parentOfType(MediaControls);
return (!mediaControls || !mediaControls.layoutTraits.isFullscreen) ? window : mediaControls.element;
}
_valueWillStartChanging()
{
// We should no longer cache the value since we'll be interacting with the <input>
// so the value should be read back from it dynamically.
delete this._value;
if (this.uiDelegate && typeof this.uiDelegate.controlValueWillStartChanging === "function")
this.uiDelegate.controlValueWillStartChanging(this);
this.isActive = true;
this.needsLayout = true;
}
_valueDidChange()
{
if (this.uiDelegate && typeof this.uiDelegate.controlValueDidChange === "function")
this.uiDelegate.controlValueDidChange(this);
this.needsLayout = true;
}
_valueDidStopChanging()
{
this.isActive = false;
if (this.uiDelegate && typeof this.uiDelegate.controlValueDidStopChanging === "function")
this.uiDelegate.controlValueDidStopChanging(this);
this.needsLayout = true;
}
_handlePointerupEvent()
{
this._pointerupTarget.removeEventListener("pointerup", this, true);
delete this._pointerupTarget;
this._valueDidStopChanging();
}
}
Slider.KnobStyle = {
Circle: "circle",
Bar: "bar",
None: "none",
};