blob: abfbb182c92a7e26a79eb1673a6a2b624cf83e67 [file] [log] [blame]
/**
* @license
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed 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 CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
(function() {
'use strict';
/**
* @appliesMixin Gerrit.KeyboardShortcutMixin
* @appliesMixin Gerrit.TooltipMixin
* @extends Polymer.Element
*/
class GrButton extends Polymer.mixinBehaviors( [
Gerrit.KeyboardShortcutBehavior,
Gerrit.TooltipBehavior,
], Polymer.GestureEventListeners(
Polymer.LegacyElementMixin(
Polymer.Element))) {
static get is() { return 'gr-button'; }
static get properties() {
return {
tooltip: String,
downArrow: {
type: Boolean,
reflectToAttribute: true,
},
link: {
type: Boolean,
value: false,
reflectToAttribute: true,
},
loading: {
type: Boolean,
value: false,
reflectToAttribute: true,
},
disabled: {
type: Boolean,
observer: '_disabledChanged',
reflectToAttribute: true,
},
noUppercase: {
type: Boolean,
value: false,
},
_enabledTabindex: {
type: String,
value: '0',
},
};
}
static get observers() {
return [
'_computeDisabled(disabled, loading)',
];
}
/** @override */
created() {
super.created();
this.addEventListener('click',
e => this._handleAction(e));
this.addEventListener('keydown',
e => this._handleKeydown(e));
}
/** @override */
ready() {
super.ready();
this._ensureAttribute('role', 'button');
this._ensureAttribute('tabindex', '0');
}
_handleAction(e) {
if (this.disabled) {
e.preventDefault();
e.stopImmediatePropagation();
}
}
_disabledChanged(disabled) {
if (disabled) {
this._enabledTabindex = this.getAttribute('tabindex') || '0';
}
this.setAttribute('tabindex', disabled ? '-1' : this._enabledTabindex);
this.updateStyles();
}
_computeDisabled(disabled, loading) {
return disabled || loading;
}
_handleKeydown(e) {
if (this.modifierPressed(e)) { return; }
e = this.getKeyboardEvent(e);
// Handle `enter`, `space`.
if (e.keyCode === 13 || e.keyCode === 32) {
e.preventDefault();
e.stopPropagation();
this.click();
}
}
}
customElements.define(GrButton.is, GrButton);
})();