| /** |
| * @license |
| * Copyright (C) 2017 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. |
| */ |
| import {GestureEventListeners} from '@polymer/polymer/lib/mixins/gesture-event-listeners.js'; |
| import {LegacyElementMixin} from '@polymer/polymer/lib/legacy/legacy-element-mixin.js'; |
| import {PolymerElement} from '@polymer/polymer/polymer-element.js'; |
| import {htmlTemplate} from './gr-limited-text_html.js'; |
| import {TooltipMixin} from '../../../mixins/gr-tooltip-mixin/gr-tooltip-mixin.js'; |
| |
| /** |
| * The gr-limited-text element is for displaying text with a maximum length |
| * (in number of characters) to display. If the length of the text exceeds the |
| * configured limit, then an ellipsis indicates that the text was truncated |
| * and a tooltip containing the full text is enabled. |
| * |
| * @extends PolymerElement |
| */ |
| class GrLimitedText extends TooltipMixin( |
| GestureEventListeners( |
| LegacyElementMixin(PolymerElement))) { |
| static get template() { return htmlTemplate; } |
| |
| static get is() { return 'gr-limited-text'; } |
| |
| static get properties() { |
| return { |
| /** The un-truncated text to display. */ |
| text: { |
| type: String, |
| value: '', |
| }, |
| |
| /** The maximum length for the text to display before truncating. */ |
| limit: { |
| type: Number, |
| value: null, |
| }, |
| |
| tooltip: { |
| type: String, |
| value: '', |
| }, |
| |
| /** Boolean property used by TooltipMixin. */ |
| hasTooltip: { |
| type: Boolean, |
| value: false, |
| }, |
| |
| /** |
| * Disable the tooltip. |
| * When set to true, will not show tooltip even text is over limit |
| */ |
| disableTooltip: { |
| type: Boolean, |
| value: false, |
| }, |
| }; |
| } |
| |
| static get observers() { |
| return [ |
| '_updateTitle(text, tooltip, limit)', |
| ]; |
| } |
| |
| /** |
| * The text or limit have changed. Recompute whether a tooltip needs to be |
| * enabled. |
| */ |
| _updateTitle(text, tooltip, limit) { |
| // Polymer 2: check for undefined |
| if ([text, limit, tooltip].includes(undefined)) { |
| return; |
| } |
| |
| this.hasTooltip = !!tooltip || (!!limit && text.length > limit); |
| if (this.hasTooltip && !this.disableTooltip) { |
| // Combine the text and title if over-length |
| if (limit && text.length > limit) { |
| this.title = `${text}${tooltip? ` (${tooltip})` : ''}`; |
| } else { |
| this.title = tooltip; |
| } |
| } else { |
| this.title = ''; |
| } |
| } |
| |
| _computeDisplayText(text, limit) { |
| if (!!limit && !!text && text.length > limit) { |
| return text.substr(0, limit - 1) + '…'; |
| } |
| return text; |
| } |
| } |
| |
| customElements.define(GrLimitedText.is, GrLimitedText); |