blob: bdce2c943887a237b0c92cf9bde0eeb3f355da8d [file] [log] [blame]
/**
* @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 '@polymer/iron-input/iron-input';
import '@polymer/iron-icon/iron-icon';
import '../../../styles/shared-styles';
import '../gr-button/gr-button';
import {PolymerElement} from '@polymer/polymer/polymer-element';
import {htmlTemplate} from './gr-list-view_html';
import {encodeURL, getBaseUrl} from '../../../utils/url-util';
import {page} from '../../../utils/page-wrapper-utils';
import {property, customElement} from '@polymer/decorators';
import {fireEvent} from '../../../utils/event-util';
import {debounce, DelayedTask} from '../../../utils/async-util';
const REQUEST_DEBOUNCE_INTERVAL_MS = 200;
declare global {
interface HTMLElementTagNameMap {
'gr-list-view': GrListView;
}
}
@customElement('gr-list-view')
export class GrListView extends PolymerElement {
static get template() {
return htmlTemplate;
}
@property({type: Boolean})
createNew?: boolean;
@property({type: Array})
items?: unknown[];
@property({type: Number})
itemsPerPage = 25;
@property({type: String, observer: '_filterChanged'})
filter?: string;
@property({type: Number})
offset?: number;
@property({type: Boolean})
loading?: boolean;
@property({type: String})
path?: string;
private reloadTask?: DelayedTask;
/** @override */
disconnectedCallback() {
this.reloadTask?.cancel();
super.disconnectedCallback();
}
_filterChanged(newFilter?: string, oldFilter?: string) {
// newFilter can be empty string and then !newFilter === true
if (!newFilter && !oldFilter) {
return;
}
this._debounceReload(newFilter);
}
_debounceReload(filter?: string) {
this.reloadTask = debounce(
this.reloadTask,
() => {
if (this.path) {
if (filter) {
return page.show(
`${this.path}/q/filter:` + encodeURL(filter, false)
);
}
return page.show(this.path);
}
},
REQUEST_DEBOUNCE_INTERVAL_MS
);
}
_createNewItem() {
fireEvent(this, 'create-clicked');
}
_computeNavLink(
offset: number,
direction: number,
itemsPerPage: number,
filter: string,
path: string
) {
// Offset could be a string when passed from the router.
offset = +(offset || 0);
const newOffset = Math.max(0, offset + itemsPerPage * direction);
let href = getBaseUrl() + path;
if (filter) {
href += '/q/filter:' + encodeURL(filter, false);
}
if (newOffset > 0) {
href += `,${newOffset}`;
}
return href;
}
_computeCreateClass(createNew?: boolean) {
return createNew ? 'show' : '';
}
_hidePrevArrow(loading?: boolean, offset?: number) {
return loading || offset === 0;
}
_hideNextArrow(loading?: boolean, items?: unknown[]) {
if (loading || !items || !items.length) {
return true;
}
const lastPage = items.length < this.itemsPerPage + 1;
return lastPage;
}
// TODO: fix offset (including itemsPerPage)
// to either support a decimal or make it go to the nearest
// whole number (e.g 3).
_computePage(offset: number, itemsPerPage: number) {
return offset / itemsPerPage + 1;
}
}