blob: dc945a2cbe5522c2e042414af351df3773b614fd [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';
const RESTORED_MESSAGE = 'Content restored from a previous edit.';
const STORAGE_DEBOUNCE_INTERVAL_MS = 400;
Polymer({
is: 'gr-editable-content',
_legacyUndefinedCheck: true,
/**
* Fired when the save button is pressed.
*
* @event editable-content-save
*/
/**
* Fired when the cancel button is pressed.
*
* @event editable-content-cancel
*/
/**
* Fired when content is restored from storage.
*
* @event show-alert
*/
properties: {
content: {
notify: true,
type: String,
},
disabled: {
reflectToAttribute: true,
type: Boolean,
value: false,
},
editing: {
observer: '_editingChanged',
type: Boolean,
value: false,
},
removeZeroWidthSpace: Boolean,
// If no storage key is provided, content is not stored.
storageKey: String,
_saveDisabled: {
computed: '_computeSaveDisabled(disabled, content, _newContent)',
type: Boolean,
value: true,
},
_newContent: {
type: String,
observer: '_newContentChanged',
},
},
focusTextarea() {
this.$$('iron-autogrow-textarea').textarea.focus();
},
_newContentChanged(newContent, oldContent) {
if (!this.storageKey) { return; }
this.debounce('store', () => {
if (newContent.length) {
this.$.storage.setEditableContentItem(this.storageKey, newContent);
} else {
this.$.storage.eraseEditableContentItem(this.storageKey);
}
}, STORAGE_DEBOUNCE_INTERVAL_MS);
},
_editingChanged(editing) {
if (!editing) { return; }
let content;
if (this.storageKey) {
const storedContent =
this.$.storage.getEditableContentItem(this.storageKey);
if (storedContent && storedContent.message) {
content = storedContent.message;
this.dispatchEvent(new CustomEvent('show-alert', {
detail: {message: RESTORED_MESSAGE},
bubbles: true,
composed: true,
}));
}
}
if (!content) {
content = this.content || '';
}
// TODO(wyatta) switch linkify sequence, see issue 5526.
this._newContent = this.removeZeroWidthSpace ?
content.replace(/^R=\u200B/gm, 'R=') :
content;
},
_computeSaveDisabled(disabled, content, newContent) {
return disabled || (content === newContent);
},
_handleSave(e) {
e.preventDefault();
this.fire('editable-content-save', {content: this._newContent});
},
_handleCancel(e) {
e.preventDefault();
this.editing = false;
this.fire('editable-content-cancel');
},
});
})();