@mobilelivenpm/fds-angular-qa
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JavaScript
import { FocusMonitor } from '@angular/cdk/a11y';
import { Directionality } from '@angular/cdk/bidi';
import { coerceBooleanProperty, coerceNumberProperty } from '@angular/cdk/coercion';
import { DOWN_ARROW, END, HOME, LEFT_ARROW, PAGE_DOWN, PAGE_UP, RIGHT_ARROW, UP_ARROW, hasModifierKey } from '@angular/cdk/keycodes';
import { ChangeDetectionStrategy, ChangeDetectorRef, Component, ElementRef, EventEmitter, forwardRef, Inject, Input, Optional, Output, ViewChild, ViewEncapsulation, NgZone } from '@angular/core';
import { NG_VALUE_ACCESSOR } from '@angular/forms';
import { ANIMATION_MODULE_TYPE } from '@angular/platform-browser/animations';
import { normalizePassiveListenerOptions } from '@angular/cdk/platform';
import { DOCUMENT } from '@angular/common';
import { Subscription } from 'rxjs';
const activeEventOptions = normalizePassiveListenerOptions({ passive: false });
/**
* Visually, a 30px separation between tick marks looks best. This is very subjective but it is
* the default separation we chose.
*/
const MIN_AUTO_TICK_SEPARATION = 30;
/** The thumb gap size for a disabled slider. */
const DISABLED_THUMB_GAP = 7;
/** The thumb gap size for a non-active slider at its minimum value. */
const MIN_VALUE_NONACTIVE_THUMB_GAP = 7;
/** The thumb gap size for an active slider at its minimum value. */
const MIN_VALUE_ACTIVE_THUMB_GAP = 10;
/**
* Provider Expression that allows slider to register as a ControlValueAccessor.
* This allows it to support [(ngModel)] and [formControl].
* @docs-private
*/
export const MAT_SLIDER_VALUE_ACCESSOR = {
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => RangeSliderComponent),
multi: true
};
/** A simple change event emitted by the MatSlider component. */
export class SliderChange {
}
/**
* Allows users to select from a range of values by moving the slider thumb. It is similar in
* behavior to the native `<input type="range">` element.
*/
export class RangeSliderComponent {
constructor(_elementRef, _focusMonitor, _changeDetectorRef, _dir, _ngZone, _document, _animationMode) {
this._elementRef = _elementRef;
this._focusMonitor = _focusMonitor;
this._changeDetectorRef = _changeDetectorRef;
this._dir = _dir;
this._ngZone = _ngZone;
this._animationMode = _animationMode;
/**
* Show min max labels
*/
this.showMinMaxLabels = false;
/** Event emitted when the slider value has changed. */
this.change = new EventEmitter();
/** Event emitted when the slider thumb moves. */
this.input = new EventEmitter();
/**
* Emits when the raw value of the slider changes. This is here primarily
* to facilitate the two-way binding for the `value` input.
* @docs-private
*/
this.valueChange = new EventEmitter();
/**
* Whether or not the thumb is sliding.
* Used to determine if there should be a transition for the thumb and fill track.
*/
this._isSliding = false;
/**
* Whether or not the slider is active (clicked or sliding).
* Used to shrink and grow the thumb as according to the Material Design spec.
*/
this._isActive = false;
/** The size of a tick interval as a percentage of the size of the track. */
this._tickIntervalPercent = 0;
/** The dimensions of the slider. */
this._sliderDimensions = null;
/** Subscription to the Directionality change EventEmitter. */
this._dirChangeSubscription = Subscription.EMPTY;
this._disabled = false;
this._tabIndex = 0;
this._invert = false;
this._max = 100;
this._min = 0;
this._step = 1;
this._thumbLabel = false;
this._tickInterval = 0;
this._value = null;
this._percent = 0;
/** onTouch function registered via registerOnTouch (ControlValueAccessor). */
this.onTouched = () => { };
this._controlValueAccessorChangeFn = () => { };
/** Called when the user has put their pointer down on the slider. */
this._pointerDown = (event) => {
// Don't do anything if the slider is disabled or the
// user is using anything other than the main mouse button.
if (this.disabled ||
this._isSliding ||
(!isTouchEvent(event) && event.button !== 0)) {
return;
}
this._ngZone.run(() => {
const oldValue = this.value;
const pointerPosition = getPointerPositionOnPage(event);
this._isSliding = true;
this._lastPointerEvent = event;
event.preventDefault();
this._focusHostElement();
this._onMouseenter(); // Simulate mouseenter in case this is a mobile device.
this._bindGlobalEvents(event);
this._focusHostElement();
this._updateValueFromPosition(pointerPosition);
this._valueOnSlideStart = oldValue;
// Emit a change and input event if the value changed.
if (oldValue != this.value) {
this._emitInputEvent();
}
});
};
/**
* Called when the user has moved their pointer after
* starting to drag. Bound on the document level.
*/
this._pointerMove = (event) => {
if (this._isSliding) {
// Prevent the slide from selecting anything else.
event.preventDefault();
const oldValue = this.value;
this._lastPointerEvent = event;
this._updateValueFromPosition(getPointerPositionOnPage(event));
// Native range elements always emit `input` events when the value changed while sliding.
if (oldValue != this.value) {
this._emitInputEvent();
}
}
};
/** Called when the user has lifted their pointer. Bound on the document level. */
this._pointerUp = (event) => {
if (this._isSliding) {
event.preventDefault();
this._removeGlobalEvents();
this._isSliding = false;
if (this._valueOnSlideStart != this.value && !this.disabled) {
this._emitChangeEvent();
}
this._valueOnSlideStart = this._lastPointerEvent = null;
}
};
/** Called when the window has lost focus. */
this._windowBlur = () => {
// If the window is blurred while dragging we need to stop dragging because the
// browser won't dispatch the `mouseup` and `touchend` events anymore.
if (this._lastPointerEvent) {
this._pointerUp(this._lastPointerEvent);
}
};
this._document = _document;
}
get disabled() {
return this._disabled;
}
set disabled(value) {
this._disabled = coerceBooleanProperty(value);
}
get tabIndex() {
return this.disabled ? -1 : this._tabIndex;
}
set tabIndex(value) {
// If the specified tabIndex value is null or undefined, fall back to the default value.
this._tabIndex = value != null ? coerceNumberProperty(value) : 0;
}
/** Whether the slider is inverted. */
get invert() {
return this._invert;
}
set invert(value) {
this._invert = coerceBooleanProperty(value);
}
/** The maximum value that the slider can have. */
get max() {
return this._max;
}
set max(v) {
this._max = coerceNumberProperty(v, this._max);
this._percent = this._calculatePercentage(this._value);
// Since this also modifies the percentage, we need to let the change detection know.
this._changeDetectorRef.markForCheck();
}
/** The minimum value that the slider can have. */
get min() {
return this._min;
}
set min(v) {
this._min = coerceNumberProperty(v, this._min);
// If the value wasn't explicitly set by the user, set it to the min.
if (this._value === null) {
this.value = this._min;
}
this._percent = this._calculatePercentage(this._value);
// Since this also modifies the percentage, we need to let the change detection know.
this._changeDetectorRef.markForCheck();
}
/** The values at which the thumb will snap. */
get step() {
return this._step;
}
set step(v) {
this._step = coerceNumberProperty(v, this._step);
if (this._step % 1 !== 0) {
this._roundToDecimal = this._step.toString().split('.').pop().length;
}
// Since this could modify the label, we need to notify the change detection.
this._changeDetectorRef.markForCheck();
}
/** Whether or not to show the thumb label. */
get thumbLabel() {
return this._thumbLabel;
}
set thumbLabel(value) {
this._thumbLabel = coerceBooleanProperty(value);
}
/**
* How often to show ticks. Relative to the step so that a tick always appears on a step.
* Ex: Tick interval of 4 with a step of 3 will draw a tick every 4 steps (every 12 values).
*/
get tickInterval() {
return this._tickInterval;
}
set tickInterval(value) {
if (value === 'auto') {
this._tickInterval = 'auto';
}
else if (typeof value === 'number' || typeof value === 'string') {
this._tickInterval = coerceNumberProperty(value, this._tickInterval);
}
else {
this._tickInterval = 0;
}
}
/** Value of the slider. */
get value() {
// If the value needs to be read and it is still uninitialized, initialize it to the min.
if (this._value === null) {
this.value = this._min;
}
return this._value;
}
set value(v) {
if (v !== this._value) {
let value = coerceNumberProperty(v);
// While incrementing by a decimal we can end up with values like 33.300000000000004.
// Truncate it to ensure that it matches the label and to make it easier to work with.
if (this._roundToDecimal) {
value = parseFloat(value.toFixed(this._roundToDecimal));
}
this._value = value;
this._percent = this._calculatePercentage(this._value);
// Since this also modifies the percentage, we need to let the change detection know.
this._changeDetectorRef.markForCheck();
}
}
/** The percentage of the slider that coincides with the value. */
get percent() {
return this._clamp(this._percent);
}
/** set focus to the host element */
focus(options) {
this._focusHostElement(options);
}
/** blur the host element */
blur() {
this._blurHostElement();
}
/**
* Whether the axis of the slider is inverted.
* (i.e. whether moving the thumb in the positive x or y direction decreases the slider's value).
*/
_shouldInvertAxis() {
// Standard non-inverted mode for a vertical slider should be dragging the thumb from bottom to
// top. However from a y-axis standpoint this is inverted.
return this.invert;
}
/** Whether the slider is at its minimum value. */
_isMinValue() {
return this.percent === 0;
}
/**
* The amount of space to leave between the slider thumb and the track fill & track background
* elements.
*/
_getThumbGap() {
if (this.disabled) {
return DISABLED_THUMB_GAP;
}
if (this._isMinValue() && !this.thumbLabel) {
return this._isActive
? MIN_VALUE_ACTIVE_THUMB_GAP
: MIN_VALUE_NONACTIVE_THUMB_GAP;
}
return 0;
}
/** CSS styles for the track background element. */
_getTrackBackgroundStyles() {
const axis = 'X';
const scale = `${1 - this.percent}, 1, 1`;
const sign = this._shouldInvertMouseCoords() ? '-' : '';
return {
// scale3d avoids some rendering issues in Chrome. See #12071.
transform: `translate${axis}(${sign}${this._getThumbGap()}px) scale3d(${scale})`
};
}
/** CSS styles for the track fill element. */
_getTrackFillStyles() {
const percent = this.percent;
const axis = 'X';
const scale = `${percent}, 1, 1`;
const sign = this._shouldInvertMouseCoords() ? '' : '-';
return {
// scale3d avoids some rendering issues in Chrome. See #12071.
transform: `translate${axis}(${sign}${this._getThumbGap()}px) scale3d(${scale})`,
// iOS Safari has a bug where it won't re-render elements which start of as `scale(0)` until
// something forces a style recalculation on it. Since we'll end up with `scale(0)` when
// the value of the slider is 0, we can easily get into this situation. We force a
// recalculation by changing the element's `display` when it goes from 0 to any other value.
display: percent === 0 ? 'none' : ''
};
}
/** CSS styles for the ticks container element. */
_getTicksContainerStyles() {
let axis = 'X';
// For a horizontal slider in RTL languages we push the ticks container off the left edge
// instead of the right edge to avoid causing a horizontal scrollbar to appear.
let sign = this._getDirection() == 'rtl' ? '' : '-';
let offset = (this._tickIntervalPercent / 2) * 100;
return {
transform: `translate${axis}(${sign}${offset}%)`
};
}
/** CSS styles for the ticks element. */
_getTicksStyles() {
let tickSize = this._tickIntervalPercent * 100;
let backgroundSize = `${tickSize}% 2px`;
let axis = 'X';
// Depending on the direction we pushed the ticks container, push the ticks the opposite
// direction to re-center them but clip off the end edge. In RTL languages we need to flip the
// ticks 180 degrees so we're really cutting off the end edge abd not the start.
let sign = this._getDirection() == 'rtl' ? '-' : '';
let rotate = this._getDirection() == 'rtl' ? ' rotate(180deg)' : '';
let styles = {
backgroundSize: backgroundSize,
// Without translateZ ticks sometimes jitter as the slider moves on Chrome & Firefox.
transform: `translateZ(0) translate${axis}(${sign}${tickSize / 2}%)${rotate}`
};
if (this._isMinValue() && this._getThumbGap()) {
const side = this._shouldInvertAxis() ? 'Right' : 'Left';
styles[`padding${side}`] = `${this._getThumbGap()}px`;
}
return styles;
}
_getThumbContainerStyles() {
const shouldInvertAxis = this._shouldInvertAxis();
let axis = 'X';
// For a horizontal slider in RTL languages we push the thumb container off the left edge
// instead of the right edge to avoid causing a horizontal scrollbar to appear.
let invertOffset = this._getDirection() == 'rtl' ? !shouldInvertAxis : shouldInvertAxis;
let offset = (invertOffset ? this.percent : 1 - this.percent) * 100;
return {
transform: `translate${axis}(-${offset}%)`
};
}
/**
* Whether mouse events should be converted to a slider position by calculating their distance
* from the right or bottom edge of the slider as opposed to the top or left.
*/
_shouldInvertMouseCoords() {
const shouldInvertAxis = this._shouldInvertAxis();
return this._getDirection() == 'rtl' ? !shouldInvertAxis : shouldInvertAxis;
}
ngAfterViewInit() {
this._ngZone.runOutsideAngular(() => {
const element = this._sliderWrapper.nativeElement;
element.addEventListener('mousedown', this._pointerDown, activeEventOptions);
element.addEventListener('touchstart', this._pointerDown, activeEventOptions);
});
this._focusMonitor
.monitor(this._sliderWrapper, true)
.subscribe((origin) => {
this._isActive = !!origin && origin !== 'keyboard';
this._changeDetectorRef.detectChanges();
});
if (this._dir) {
this._dirChangeSubscription = this._dir.change.subscribe(() => {
this._changeDetectorRef.markForCheck();
});
}
}
ngOnDestroy() {
// There is no _sliderWrapper element when component is dynamically created and didn't attached to the DOM
if (this._sliderWrapper) {
const element = this._sliderWrapper.nativeElement;
element.removeEventListener('mousedown', this._pointerDown, activeEventOptions);
element.removeEventListener('touchstart', this._pointerDown, activeEventOptions);
}
this._lastPointerEvent = null;
this._removeGlobalEvents();
this._focusMonitor.stopMonitoring(this._sliderWrapper);
this._dirChangeSubscription.unsubscribe();
}
_onMouseenter() {
if (this.disabled) {
return;
}
// We save the dimensions of the slider here so we can use them to update the spacing of the
// ticks and determine where on the slider click and slide events happen.
this._sliderDimensions = this._getSliderDimensions();
this._updateTickIntervalPercent();
}
_onFocus() {
// We save the dimensions of the slider here so we can use them to update the spacing of the
// ticks and determine where on the slider click and slide events happen.
this._sliderDimensions = this._getSliderDimensions();
this._updateTickIntervalPercent();
}
_onBlur() {
this.onTouched();
}
_onKeydown(event) {
if (this.disabled || hasModifierKey(event)) {
return;
}
const oldValue = this.value;
switch (event.keyCode) {
case PAGE_UP:
this._increment(10);
break;
case PAGE_DOWN:
this._increment(-10);
break;
case END:
this.value = this.max;
break;
case HOME:
this.value = this.min;
break;
case LEFT_ARROW:
// NOTE: For a sighted user it would make more sense that when they press an arrow key on an
// inverted slider the thumb moves in that direction. However for a blind user, nothing
// about the slider indicates that it is inverted. They will expect left to be decrement,
// regardless of how it appears on the screen. For speakers ofRTL languages, they probably
// expect left to mean increment. Therefore we flip the meaning of the side arrow keys for
// RTL. For inverted sliders we prefer a good a11y experience to having it "look right" for
// sighted users, therefore we do not swap the meaning.
this._increment(this._getDirection() == 'rtl' ? 1 : -1);
break;
case UP_ARROW:
this._increment(1);
break;
case RIGHT_ARROW:
// See comment on LEFT_ARROW about the conditions under which we flip the meaning.
this._increment(this._getDirection() == 'rtl' ? -1 : 1);
break;
case DOWN_ARROW:
this._increment(-1);
break;
default:
// Return if the key is not one that we explicitly handle to avoid calling preventDefault on
// it.
return;
}
if (oldValue != this.value) {
this._emitInputEvent();
this._emitChangeEvent();
}
this._isSliding = true;
event.preventDefault();
}
_onKeyup() {
this._isSliding = false;
}
/**
* Sets the model value. Implemented as part of ControlValueAccessor.
* @param value
*/
writeValue(value) {
this.value = value;
}
/**
* Registers a callback to be triggered when the value has changed.
* Implemented as part of ControlValueAccessor.
* @param fn Callback to be registered.
*/
registerOnChange(fn) {
this._controlValueAccessorChangeFn = fn;
}
/**
* Registers a callback to be triggered when the component is touched.
* Implemented as part of ControlValueAccessor.
* @param fn Callback to be registered.
*/
registerOnTouched(fn) {
this.onTouched = fn;
}
/**
* Sets whether the component should be disabled.
* Implemented as part of ControlValueAccessor.
* @param isDisabled
*/
setDisabledState(isDisabled) {
this.disabled = isDisabled;
}
/** The language direction for this slider element. */
_getDirection() {
return this._dir && this._dir.value == 'rtl' ? 'rtl' : 'ltr';
}
/** Use defaultView of injected document if available or fallback to global window reference */
_getWindow() {
return this._document.defaultView || window;
}
/**
* Binds our global move and end events. They're bound at the document level and only while
* dragging so that the user doesn't have to keep their pointer exactly over the slider
* as they're swiping across the screen.
*/
_bindGlobalEvents(triggerEvent) {
// Note that we bind the events to the `document`, because it allows us to capture
// drag cancel events where the user's pointer is outside the browser window.
const document = this._document;
const isTouch = isTouchEvent(triggerEvent);
const moveEventName = isTouch ? 'touchmove' : 'mousemove';
const endEventName = isTouch ? 'touchend' : 'mouseup';
document.addEventListener(moveEventName, this._pointerMove, activeEventOptions);
document.addEventListener(endEventName, this._pointerUp, activeEventOptions);
if (isTouch) {
document.addEventListener('touchcancel', this._pointerUp, activeEventOptions);
}
const window = this._getWindow();
if (typeof window !== 'undefined' && window) {
window.addEventListener('blur', this._windowBlur);
}
}
/** Removes any global event listeners that we may have added. */
_removeGlobalEvents() {
const document = this._document;
document.removeEventListener('mousemove', this._pointerMove, activeEventOptions);
document.removeEventListener('mouseup', this._pointerUp, activeEventOptions);
document.removeEventListener('touchmove', this._pointerMove, activeEventOptions);
document.removeEventListener('touchend', this._pointerUp, activeEventOptions);
document.removeEventListener('touchcancel', this._pointerUp, activeEventOptions);
const window = this._getWindow();
if (typeof window !== 'undefined' && window) {
window.removeEventListener('blur', this._windowBlur);
}
}
/** Increments the slider by the given number of steps (negative number decrements). */
_increment(numSteps) {
this.value = this._clamp((this.value || 0) + this.step * numSteps, this.min, this.max);
}
/** Calculate the new value from the new physical location. The value will always be snapped. */
_updateValueFromPosition(pos) {
if (!this._sliderDimensions) {
return;
}
let offset = this._sliderDimensions.left;
let size = this._sliderDimensions.width;
let posComponent = pos.x;
// The exact value is calculated from the event and used to find the closest snap value.
let percent = this._clamp((posComponent - offset) / size);
if (this._shouldInvertMouseCoords()) {
percent = 1 - percent;
}
// Since the steps may not divide cleanly into the max value, if the user
// slid to 0 or 100 percent, we jump to the min/max value. This approach
// is slightly more intuitive than using `Math.ceil` below, because it
// follows the user's pointer closer.
if (percent === 0) {
this.value = this.min;
}
else if (percent === 1) {
this.value = this.max;
}
else {
const exactValue = this._calculateValue(percent);
// This calculation finds the closest step by finding the closest
// whole number divisible by the step relative to the min.
const closestValue = Math.round((exactValue - this.min) / this.step) * this.step + this.min;
// The value needs to snap to the min and max.
this.value = this._clamp(closestValue, this.min, this.max);
}
}
/** Emits a change event if the current value is different from the last emitted value. */
_emitChangeEvent() {
this._controlValueAccessorChangeFn(this.value);
this.valueChange.emit(this.value);
this.change.emit(this._createChangeEvent());
}
/** Emits an input event when the current value is different from the last emitted value. */
_emitInputEvent() {
this.input.emit(this._createChangeEvent());
}
/** Updates the amount of space between ticks as a percentage of the width of the slider. */
_updateTickIntervalPercent() {
if (!this.tickInterval || !this._sliderDimensions) {
return;
}
if (this.tickInterval == 'auto') {
let trackSize = this._sliderDimensions.width;
let pixelsPerStep = (trackSize * this.step) / (this.max - this.min);
let stepsPerTick = Math.ceil(MIN_AUTO_TICK_SEPARATION / pixelsPerStep);
let pixelsPerTick = stepsPerTick * this.step;
this._tickIntervalPercent = pixelsPerTick / trackSize;
}
else {
this._tickIntervalPercent =
(this.tickInterval * this.step) / (this.max - this.min);
}
}
/** Creates a slider change object from the specified value. */
_createChangeEvent(value = this.value) {
let event = new SliderChange();
event.source = this;
event.value = value;
return event;
}
/** Calculates the percentage of the slider that a value is. */
_calculatePercentage(value) {
return ((value || 0) - this.min) / (this.max - this.min);
}
/** Calculates the value a percentage of the slider corresponds to. */
_calculateValue(percentage) {
return this.min + percentage * (this.max - this.min);
}
/** Return a number between two numbers. */
_clamp(value, min = 0, max = 1) {
return Math.max(min, Math.min(value, max));
}
/**
* Get the bounding client rect of the slider track element.
* The track is used rather than the native element to ignore the extra space that the thumb can
* take up.
*/
_getSliderDimensions() {
return this._sliderWrapper
? this._sliderWrapper.nativeElement.getBoundingClientRect()
: null;
}
/**
* Focuses the native element.
* Currently only used to allow a blur event to fire but will be used with keyboard input later.
*/
_focusHostElement(options) {
this._sliderWrapper.nativeElement.focus(options);
}
/** Blurs the native element. */
_blurHostElement() {
this._sliderWrapper.nativeElement.blur();
}
/** The value to be used for display purposes. */
formatValue(value) {
if (this.displayWith) {
// Value is never null but since setters and getters cannot have
// different types, the value getter is also typed to return null.
return this.displayWith(value);
}
// Note that this could be improved further by rounding something like 0.999 to 1 or
// 0.899 to 0.9, however it is very performance sensitive, because it gets called on
// every change detection cycle.
if (this._roundToDecimal && value && value % 1 !== 0) {
return value.toFixed(this._roundToDecimal);
}
return value || 0;
}
}
RangeSliderComponent.decorators = [
{ type: Component, args: [{
selector: 'fds-range-slider',
template: "<div\n class=\"d--flex justify--content--between pb-3 slider-labels\"\n *ngIf=\"showMinMaxLabels\"\n>\n <span class=\"slider-label-min\">{{ formatValue(min) }}</span>\n <span class=\"slider-label-max\">{{ formatValue(max) }}</span>\n</div>\n<!--\n// On Safari starting to slide temporarily triggers text selection mode which\n// show the wrong cursor. We prevent it by stopping the `selectstart` event.\n \"(selectstart)\": \"$event.preventDefault()\",\n-->\n<div\n class=\"slider-wrapper\"\n #sliderWrapper\n (focus)=\"_onFocus()\"\n (blur)=\"_onBlur()\"\n (keydown)=\"_onKeydown($event)\"\n (keyup)=\"_onKeyup()\"\n (mouseenter)=\"_onMouseenter()\"\n (selectstart)=\"$event.preventDefault()\"\n role=\"slider\"\n aria-live=\"polite\"\n aria-atomic=\"true\"\n [tabIndex]=\"tabIndex\"\n [attr.aria-disabled]=\"disabled\"\n [attr.aria-valuemax]=\"max\"\n [attr.aria-valuemin]=\"min\"\n [attr.aria-valuenow]=\"value\"\n [attr.aria-orientation]=\"'horizontal'\"\n>\n <div class=\"slider-track-wrapper\">\n <div class=\"slider-track-background\"></div>\n <div class=\"slider-track-fill\" [ngStyle]=\"_getTrackFillStyles()\"></div>\n </div>\n <div class=\"slider-ticks-container\">\n <div class=\"slider-ticks\" [ngStyle]=\"_getTicksContainerStyles()\"></div>\n </div>\n <div class=\"slider-thumb-container\" [ngStyle]=\"_getThumbContainerStyles()\">\n <div class=\"slider-focus-ring\"></div>\n <div class=\"slider-thumb\"></div>\n <div class=\"slider-thumb-label\">\n <span class=\"slider-thumb-label-text\">{{ formatValue(value) }}</span>\n </div>\n </div>\n</div>",
providers: [MAT_SLIDER_VALUE_ACCESSOR],
host: {
class: 'slider focus-indicator',
'[class.slider-disabled]': 'disabled',
'[class.slider-has-ticks]': 'tickInterval',
'[class.slider-horizontal]': 'true',
'[class.slider-axis-inverted]': '_shouldInvertAxis()',
// Class binding which is only used by the test harness as there is no other
// way for the harness to detect if mouse coordinates need to be inverted.
'[class.slider-invert-mouse-coords]': '_shouldInvertMouseCoords()',
'[class.slider-sliding]': '_isSliding',
'[class.slider-thumb-label-showing]': 'thumbLabel',
'[class.slider-min-value]': '_isMinValue()',
'[class.slider-hide-last-tick]': 'disabled || _isMinValue() && _getThumbGap() && _shouldInvertAxis()',
'[class._animation-noopable]': '_animationMode === "NoopAnimations"'
},
encapsulation: ViewEncapsulation.None,
changeDetection: ChangeDetectionStrategy.OnPush,
styles: [""]
},] }
];
RangeSliderComponent.ctorParameters = () => [
{ type: ElementRef },
{ type: FocusMonitor },
{ type: ChangeDetectorRef },
{ type: Directionality, decorators: [{ type: Optional }] },
{ type: NgZone },
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] },
{ type: String, decorators: [{ type: Optional }, { type: Inject, args: [ANIMATION_MODULE_TYPE,] }] }
];
RangeSliderComponent.propDecorators = {
displayWith: [{ type: Input }],
showMinMaxLabels: [{ type: Input }],
change: [{ type: Output }],
input: [{ type: Output }],
valueChange: [{ type: Output }],
_sliderWrapper: [{ type: ViewChild, args: ['sliderWrapper',] }],
disabled: [{ type: Input }],
tabIndex: [{ type: Input }],
invert: [{ type: Input }],
max: [{ type: Input }],
min: [{ type: Input }],
step: [{ type: Input }],
thumbLabel: [{ type: Input }],
tickInterval: [{ type: Input }],
value: [{ type: Input }]
};
/** Returns whether an event is a touch event. */
function isTouchEvent(event) {
// This function is called for every pixel that the user has dragged so we need it to be
// as fast as possible. Since we only bind mouse events and touch events, we can assume
// that if the event's name starts with `t`, it's a touch event.
return event.type[0] === 't';
}
/** Gets the coordinates of a touch or mouse event relative to the viewport. */
function getPointerPositionOnPage(event) {
// `touches` will be empty for start/end events so we have to fall back to `changedTouches`.
const point = isTouchEvent(event)
? event.touches[0] || event.changedTouches[0]
: event;
return { x: point.clientX, y: point.clientY };
}
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