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* Copyright 2019 Adobe. All rights reserved.
* This file is licensed to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License. You may obtain a copy
* of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
* OF ANY KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
import {BaseLabellable} from '../../../coral-base-labellable';
import {Icon} from '../../../coral-component-icon';
import {transform, validate, commons} from '../../../coral-utils';
/**
Enumeration for {@link Button}, {@link AnchorButton} icon sizes.
@typedef {Object} ButtonIconSizeEnum
@property {String} EXTRA_EXTRA_SMALL
Extra extra small size icon, typically 9px size.
@property {String} EXTRA_SMALL
Extra small size icon, typically 12px size.
@property {String} SMALL
Small size icon, typically 18px size. This is the default size.
@property {String} MEDIUM
Medium size icon, typically 24px size.
*/
const iconSize = {};
const excludedIconSizes = [Icon.size.LARGE, Icon.size.EXTRA_LARGE, Icon.size.EXTRA_EXTRA_LARGE];
for (const key in Icon.size) {
// Populate button icon sizes by excluding the largest icon sizes
if (excludedIconSizes.indexOf(Icon.size[key]) === -1) {
iconSize[key] = Icon.size[key];
}
}
/**
Enumeration for {@link Button}, {@link AnchorButton} variants.
@typedef {Object} ButtonVariantEnum
@property {String} CTA
A button that is meant to grab the user's attention.
@property {String} PRIMARY
A button that is meant to grab the user's attention.
@property {String} QUIET
A quiet button that indicates that the button's action is the primary action.
@property {String} SECONDARY
A button that indicates that the button's action is the secondary action.
@property {String} QUIET_SECONDARY
A quiet secondary button.
@property {String} ACTION
An action button.
@property {String} QUIET_ACTION
A quiet action button.
@property {String} MINIMAL
A quiet minimalistic button.
@property {String} WARNING
A button that indicates that the button's action is dangerous.
@property {String} QUIET_WARNING
A quiet warning button,
@property {String} OVER_BACKGROUND
A button to be placed on top of colored background.
@property {String} DEFAULT
The default button look and feel.
*/
const variant = {
CTA: 'cta',
PRIMARY: 'primary',
SECONDARY: 'secondary',
QUIET: 'quiet',
MINIMAL: 'minimal',
WARNING: 'warning',
ACTION: 'action',
QUIET_ACTION: 'quietaction',
QUIET_SECONDARY: 'quietsecondary',
QUIET_WARNING: 'quietwarning',
OVER_BACKGROUND: 'overbackground',
DEFAULT: 'default',
// Private to be used for custom Button classes like field buttons
_CUSTOM: '_custom'
};
// the button's base classname
const CLASSNAME = '_coral-Button';
const ACTION_CLASSNAME = '_coral-ActionButton';
const ALL_VARIANT_CLASSES = [
`${CLASSNAME}--cta`,
`${CLASSNAME}--primary`,
`${CLASSNAME}--secondary`,
`${CLASSNAME}--warning`,
`${CLASSNAME}--quiet`,
`${ACTION_CLASSNAME}--quiet`,
`${CLASSNAME}--overBackground`,
];
const VARIANT_MAP = {
cta: [CLASSNAME, ALL_VARIANT_CLASSES[0]],
primary: [CLASSNAME, ALL_VARIANT_CLASSES[0]],
secondary: [CLASSNAME, ALL_VARIANT_CLASSES[2]],
warning: [CLASSNAME, ALL_VARIANT_CLASSES[3]],
quiet: [CLASSNAME, ALL_VARIANT_CLASSES[1], ALL_VARIANT_CLASSES[4]],
minimal: [CLASSNAME, ALL_VARIANT_CLASSES[2], ALL_VARIANT_CLASSES[4]],
default: [CLASSNAME, ALL_VARIANT_CLASSES[1]],
action: [ACTION_CLASSNAME],
quietaction: [ACTION_CLASSNAME, ALL_VARIANT_CLASSES[5]],
quietsecondary: [CLASSNAME, ALL_VARIANT_CLASSES[2], ALL_VARIANT_CLASSES[4]],
quietwarning: [CLASSNAME, ALL_VARIANT_CLASSES[3], ALL_VARIANT_CLASSES[4]],
overbackground: [CLASSNAME, ALL_VARIANT_CLASSES[6]]
};
/**
Enumeration for {@link BaseButton} sizes.
@typedef {Object} ButtonSizeEnum
@property {String} MEDIUM
A medium button is the default, normal sized button.
@property {String} LARGE
Not supported. Falls back to MEDIUM.
*/
const size = {
MEDIUM: 'M',
LARGE: 'L'
};
/**
Enumeration for {@link BaseButton} icon position options.
@typedef {Object} ButtonIconPositionEnum
@property {String} RIGHT
Position should be right of the button label.
@property {String} LEFT
Position should be left of the button label.
*/
const iconPosition = {
RIGHT: 'right',
LEFT: 'left'
};
/**
@base BaseButton
@classdesc The base element for Button components
*/
const BaseButton = (superClass) => class extends BaseLabellable(superClass) {
/** @ignore */
constructor() {
super();
// Templates
this._elements = {
// Create or fetch the label element
label: this.querySelector(this._contentZoneTagName) || document.createElement(this._contentZoneTagName),
icon: this.querySelector('coral-icon')
};
// Events
this._events = {
mousedown: '_onMouseDown',
click: '_onClick'
};
super._observeLabel();
}
/**
The label of the button.
@type {HTMLElement}
@contentzone
*/
get label() {
return this._getContentZone(this._elements.label);
}
set label(value) {
this._setContentZone('label', value, {
handle: 'label',
tagName: this._contentZoneTagName,
insert: function (label) {
// Update label styles
this._updateLabel(label);
// Ensure there's no extra space left for icon only buttons
Eif (label.innerHTML.trim() === '') {
label.textContent = '';
}
if (this.iconPosition === iconPosition.LEFT) {
this.appendChild(label);
} else {
this.insertBefore(label, this.firstChild);
}
}
});
}
/**
Position of the icon relative to the label. If no <code>iconPosition</code> is provided, it will be set on the
left side by default.
See {@link ButtonIconPositionEnum}.
@type {String}
@default ButtonIconPositionEnum.LEFT
@htmlattribute iconposition
@htmlattributereflected
*/
get iconPosition() {
return this._iconPosition || iconPosition.LEFT;
}
set iconPosition(value) {
value = transform.string(value).toLowerCase();
value = validate.enumeration(iconPosition)(value) && value || iconPosition.LEFT;
this._reflectAttribute('iconposition', value);
if(validate.valueMustChange(this._iconPosition, value)) {
this._iconPosition = value;
this._updateIcon(this.icon);
}
}
/**
Specifies the icon name used inside the button. See {@link Icon} for valid icon names.
@type {String}
@default ""
@htmlattribute icon
*/
get icon() {
if (this._elements.icon) {
return this._elements.icon.getAttribute('icon') || '';
}
return this._icon || '';
}
set icon(value) {
value = transform.string(value);
if(validate.valueMustChange(this._icon, value)) {
this._icon = value;
this._updateIcon(value);
}
}
E
/**
Size of the icon. It accepts both lower and upper case sizes. See {@link ButtonIconSizeEnum}.
@type {String}
@default ButtonIconSizeEnum.SMALL
@htmlattribute iconsize
*/
get iconSize() {
if (this._elements.icon) {
return this._elements.icon.getAttribute('size') || Icon.size.SMALL;
}
return this._iconSize || Icon.size.SMALL;
}
set iconSize(value) {
value = transform.string(value).toUpperCase();
value = validate.enumeration(Icon.size)(value) && value || Icon.size.SMALL;
if(validate.valueMustChange(this._iconSize, value)) {
this._iconSize = value;
this._updatedIcon && this._getIconElement().setAttribute('size', value);
}
}
/**
Whether aria-label is set automatically. See {@link IconAutoAriaLabelEnum}.
@type {String}
@default IconAutoAriaLabelEnum.OFF
@htmlattribute autoarialabel
*/
get iconAutoAriaLabel() {
if (this._elements.icon) {
return this._elements.icon.getAttribute('autoarialabel') || Icon.autoAriaLabel.OFF;
}
return this._iconAutoAriaLabel || Icon.autoAriaLabel.OFF;
}
set iconAutoAriaLabel(value) {
value = transform.string(value).toLowerCase();
value = validate.enumeration(Icon.autoAriaLabel)(value) && value || Icon.autoAriaLabel.OFF;
if(validate.valueMustChange(this._iconAutoAriaLabel, value)) {
this._iconAutoAriaLabel = value;
this._updatedIcon && this._getIconElement().setAttribute('autoarialabel', value);
}
}
/**
The size of the button. It accepts both lower and upper case sizes. See {@link ButtonSizeEnum}.
CurrentlyI only "MEDIUM" is supported.
@type {String}
@default ButtonSizeEnum.MEDIUM
@htmlattribute size
@htmlattributereflected
*/
get size() {
return this._size || size.MEDIUM;
}
set size(value) {
value = transform.string(value).toUpperCase();
this._size = validate.enumeration(size)(value) && value || size.MEDIUM;
this._reflectAttribute('size', this._size);
}
/**
Whether the button is selected.
@type {Boolean}
@default false
@htmlattribute selected
@htmlattributereflected
*/
get selected() {
return this._selected || false;
}
set selected(value) {
value = transform.booleanAttr(value);
this._reflectAttribute('selected', value);
if(validate.valueMustChange(this._selected, value)) {
this._selected = value;
this.classList.toggle('is-selected', value);
this.trigger('coral-button:_selectedchanged');
}
}
// We just reflect it but we also trigger an event to be used by button group
/** @ignore */
get value() {
return this.getAttribute('value');
}
set value(value) {
this._reflectAttribute('value', value);
this.trigger('coral-button:_valuechanged');
}
/**
Expands the button to the full width of the parent.
@type {Boolean}
@default false
@htmlattribute block
@htmlattributereflected
*/
get block() {
return this._block || false;
}
set block(value) {
value = transform.booleanAttr(value);
this._reflectAttribute('block', value);
if(validate.valueMustChange(this._block, value)) {
this._block = value;
this.classList.toggle(`${CLASSNAME}--block`, value);
}
}
/**
The button's variant. See {@link ButtonVariantEnum}.
@type {String}
@default ButtonVariantEnum.DEFAULT
@htmlEattribute variant
@htmlattributereflected
*/
get variant() {
return this._variant || variant.DEFAULT;
}
set variant(value) {
value = transform.string(value).toLowerCase();
value = validate.enumeration(variant)(value) && value || variant.DEFAULT;
this._reflectAttribute('variant', value);
if(validate.valueMustChange(this._variant , value)) {
this._variant = value;
// removes every existing variant
this.classList.remove(CLASSNAME, ACTION_CLASSNAME);
this.classList.remove(...ALL_VARIANT_CLASSES);
if (value === variant._CUSTOM) {
this.classList.remove(CLASSNAME);
} else {
this.classList.add(...VARIANT_MAP[value]);
if (value === variant.ACTION || value === variant.QUIET_ACTION) {
this.classList.remove(CLASSNAME);
}
}
// Update label styles
this._updateLabel();
}
}
/**
Inherited from {@link BaseComponent#trackingElement}.
*/
get trackingElement() {
return typeof this._trackingElement === 'undefined' ?
// keep spaces to only 1 max and trim. this mimics native html behaviors
(this.label || this).textContent.replace(/\s{2,}/g, ' ').trim() || this.icon :
this._trackingElement;
}
set trackingElement(value) {
super.trackingElement = value;
}
_onClick(event) {
if (!this.disabled) {
this._trackEvent('click', this.getAttribute('is'), event);
}
}
/** @ignore */
_updateIcon(value) {
if (!this._updatedIcon && this._elements.icon) {
return;
}
this._updatedIcon = true;
const iconSizeValue = this.iconSize;
const iconAutoAriaLabelValue = this.iconAutoAriaLabel;
const iconElement = this._getIconElement();
iconElement.icon = value;
// Update size as well
iconElement.size = iconSizeValue;
// Update autoAriaLabel as well
iconElement.autoAriaLabel = iconAutoAriaLabelValue;
// removes the icon element from the DOM.
if (this.icon === '') {
iconElement.remove();
}
// aEdd or adjust the icon. Add it back since it was blown away by textContent
else if (!iconElement.parentNode || this._iconPosition) {
if (this.contains(this.label)) {
// insertBefore with <code>null</code> appends
this.insertBefore(iconElement, this.iconPosition === iconPosition.LEFT ? this.label : this.label.nextElementSibling);
}
}
super._toggleIconAriaHidden();
}
/** @ignore */
_getIconElement() {
if (!this._elements.icon) {
this._elements.icon = new Icon();
this._elements.icon.size = this.iconSize;
}
return this._elements.icon;
}
/**
Forces button to receive focus on mousedown
@param {MouseEvent} event mousedown event
@ignore
*/
_onMouseDown(event) {
const target = event.matchedTarget;
// Wait a frame or button won't receive focus in Safari.
window.requestAnimationFrame(() => {
if (target !== document.activeElement) {
target.focus();
}
});
}
_updateLabel(label) {
label = label || this._elements.label;
label.classList.remove(`${CLASSNAME}-label`, `${ACTION_CLASSNAME}-label`);
if (this._variant !== variant._CUSTOM) {
if (this._variant === variant.ACTION || this._variant === variant.QUIET_ACTION) {
label.classList.add(`${ACTION_CLASSNAME}-label`);
} else {
label.classList.add(`${CLASSNAME}-label`);
}
}
}
/** @private */
get _contentZoneTagName() {
return Object.keys(this._contentZones)[0];
}
get _contentZones() {
return {'coral-button-label': 'label'};
}
/**
Returns {@link BaseButton} sizes.
@return {ButtonSizeEnum}
*/
static get size() {
return size;
}
/**
Returns {@link BaseButton} variants.
@return {ButtonVariantEnum}
*/
static get variant() {
return variant;
}
/**
Returns {@link BaseButton} icon positions.
@retuErn {ButtonIconPositionEnum}
*/
static get iconPosition() {
return iconPosition;
}
/**
Returns {@link BaseButton} icon sizes.
@return {ButtonIconSizeEnum}
*/
static get iconSize() {
return iconSize;
}
static get _attributePropertyMap() {
return commons.extend(super._attributePropertyMap, {
iconposition: 'iconPosition',
iconsize: 'iconSize',
iconautoarialabel: 'iconAutoAriaLabel'
});
}
/** @ignore */
static get observedAttributes() {
return super.observedAttributes.concat([
'iconposition',
'iconsize',
'icon',
'iconautoarialabel',
'size',
'selected',
'block',
'variant',
'value'
]);
}
/** @ignore */
render() {
super.render();
// Default reflected attributes
if (!this._variant) {
this.variant = variant.DEFAULT;
}
if (!this._size) {
this.size = size.MEDIUM;
}
// Create a fragment
const fragment = document.createDocumentFragment();
const label = this._elements.label;
const contentZoneProvided = label.parentNode;
// Remove it so we can process children
if (contentZoneProvided) {
this.removeChild(label);
}
let iconAdded = false;
// Process remaining elements as necessary
while (this.firstChild) {
const child = this.firstChild;
if (child.nodeName === 'CORAL-ICON') {
// Don't add duplicated icons
if (iconAdded) {
this.removeChild(child);
} else {
// Conserve existing icon element to content
this._elements.icon = child;
fragment.appendChild(child);
iconAdded = true;
}
}
// Avoid content zone to be voracious
else if (contentZoneProvided) {
fragment.appendChild(child);
} else {
// Move anything else into the label
label.appendChild(child);
}
}
// Add the frag to the component
this.appendChild(fragment);
// Assign the content zones, moving them into place in the process
this.label = label;
// Make sure the icon is well positioned
this._updatedIcon = true;
this._updateIcon(this.icon);
}
/**
Triggered when {@link BaseButton#selected} changed.
@typedef {CustomEvent} coral-button:_selectedchanged
@private
*/
/**
Triggered when {@link BaseButton#value} changed.
@typedef {CustomEvent} coral-button:_valuechanged
@private
*/
};
export default BaseButton;
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