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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview 'settings-textarea' is a component similar to native textarea,
* and inherits styling from cr-input.
*/
Polymer({
is: 'settings-textarea',
properties: {
/**
* Whether the text area should automatically get focus when the page
* loads.
*/
autofocus: {
type: Boolean,
value: false,
reflectToAttribute: true,
},
/**
* Whether the text area is disabled. When disabled, the text area loses
* focus and is not reachable by tabbing.
*/
disabled: {
type: Boolean,
value: false,
reflectToAttribute: true,
observer: 'onDisabledChanged_'
},
/** Number of rows (lines) of the text area. */
rows: {
type: Number,
value: 3,
reflectToAttribute: true,
},
/** Caption of the text area. */
label: {
type: String,
value: '',
},
/**
* Text inside the text area. If the text exceeds the bounds of the text
* area, i.e. if it has more than |rows| lines, a scrollbar is shown by
* default.
*/
value: {
type: String,
value: '',
notify: true,
},
},
/**
* 'change' event fires when <input> value changes and user presses 'Enter'.
* This function helps propagate it to host since change events don't
* propagate across Shadow DOM boundary by default.
* @param {!Event} e
* @private
*/
onInputChange_: function(e) {
this.fire('change', {sourceEvent: e});
},
/**@private */
onInputFocusChange_: function() {
// focused_ is used instead of :focus-within, so focus on elements within
// the suffix slot does not trigger a change in input styles.
if (this.shadowRoot.activeElement == this.$.input) {
this.setAttribute('focused_', '');
} else {
this.removeAttribute('focused_');
}
},
/**@private */
onDisabledChanged_: function() {
this.setAttribute('aria-disabled', this.disabled ? 'true' : 'false');
},
});
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