mirror of
https://github.com/EGroupware/egroupware.git
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240 lines
4.7 KiB
TypeScript
240 lines
4.7 KiB
TypeScript
/**
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* EGroupware eTemplate2 - Image widget
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*
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package etemplate
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* @subpackage api
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* @link https://www.egroupware.org
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* @author Nathan Gray
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*/
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import {css, html, LitElement, render} from "lit";
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import {Et2Widget} from "../Et2Widget/Et2Widget";
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import {et2_IDetachedDOM} from "../et2_core_interfaces";
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export class Et2Image extends Et2Widget(LitElement) implements et2_IDetachedDOM
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{
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static get styles()
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{
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return [
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...super.styles,
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css`
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:host {
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display: inline-block;
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}
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::slotted(img) {
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max-height: 100%;
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max-width: 100%;
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}
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:host([icon]) {
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height: 1.3rem;
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}
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`];
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}
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static get properties()
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{
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return {
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...super.properties,
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/**
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* The label of the image
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* Actually not used as label, but we put it as title
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*/
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label: {
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type: String
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},
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/**
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* Image
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* Displayed image
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*/
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src: {type: String},
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/**
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* Default image
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* Image to use if src is not found
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*/
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defaultSrc: {type: String},
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/**
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* Link Target
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* Link URL, empty if you don't wan't to display a link.
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*/
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href: {type: String},
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/**
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* Link target
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* Link target descriptor
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*/
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extraLinkTarget: {type: String},
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/**
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* Popup
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* widthxheight, if popup should be used, eg. 640x480
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*/
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extraLinkPopup: {type: String},
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}
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}
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constructor()
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{
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super();
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this.src = "";
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this.defaultSrc = "";
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this.href = "";
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this.label = "";
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this.extraLinkTarget = "_self";
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this.extraLinkPopup = "";
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this._handleClick = this._handleClick.bind(this);
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}
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connectedCallback()
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{
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super.connectedCallback();
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}
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_imageTemplate()
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{
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let src = this.parse_href(this.src) || this.parse_href(this.defaultSrc);
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if(!src)
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{
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// Hide if no valid image
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return '';
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}
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return html`
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<img ${this.id ? html`id="${this.id}"` : ''}
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src="${src}"
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alt="${this.label}"
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part="image"
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loading="lazy"
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title="${this.statustext || this.label}"
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>`;
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}
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render()
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{
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return html`
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<slot></slot>`;
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}
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protected parse_href(img_href : string) : string
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{
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img_href = img_href || '';
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// allow url's too
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if(img_href[0] == '/' || img_href.substr(0, 4) == 'http' || img_href.substr(0, 5) == 'data:')
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{
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return img_href;
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}
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let src = this.egw()?.image(img_href);
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if(src)
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{
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return src;
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}
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return "";
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}
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_handleClick(_ev : MouseEvent) : boolean
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{
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if(this.href)
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{
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this.egw().open_link(this.href, this.extraLinkTarget, this.extraLinkPopup);
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}
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else
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{
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return super._handleClick(_ev);
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}
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}
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get _img()
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{
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return this.querySelector('img');
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}
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/**
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* Handle changes that have to happen based on changes to properties
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*
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*/
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updated(changedProperties)
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{
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super.updated(changedProperties);
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if(changedProperties.has("src") && !this._img)
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{
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render(this._imageTemplate(), this);
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}
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if(changedProperties.has("src") && this._img)
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{
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this._img.setAttribute("src", this.parse_href(this.src) || this.parse_href(this.defaultSrc));
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}
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// if there's an href or onclick, make it look clickable
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if(changedProperties.has("href") || typeof this.onclick !== "undefined")
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{
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this.classList.toggle("et2_clickable", this.href || typeof this.onclick !== "undefined")
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}
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for(const changedPropertiesKey in changedProperties)
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{
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if(Et2Image.getPropertyOptions()[changedPropertiesKey])
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{
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this._img[changedPropertiesKey] = this[changedPropertiesKey];
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}
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}
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}
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transformAttributes(_attrs : any)
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{
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super.transformAttributes(_attrs);
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// Expand src with additional stuff
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// This should go away, since we're not checking for $ or @
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if(typeof _attrs["src"] != "undefined")
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{
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let manager = this.getArrayMgr("content");
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if(manager && _attrs["src"])
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{
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let src = manager.getEntry(_attrs["src"], false, true);
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if(typeof src != "undefined" && src !== null)
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{
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if(typeof src == "object")
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{
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this.src = this.egw().link('/index.php', src);
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}
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else
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{
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this.src = src;
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}
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}
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}
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}
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}
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/**
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* Code for implementing et2_IDetachedDOM
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*
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* Individual widgets are detected and handled by the grid, but the interface is needed for this to happen
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*
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* @param {array} _attrs array to add further attributes to
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*/
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getDetachedAttributes(_attrs)
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{
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_attrs.push("src", "label", "href", "statustext");
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}
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getDetachedNodes()
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{
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return [<HTMLElement><unknown>this];
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}
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setDetachedAttributes(_nodes, _values)
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{
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for(let attr in _values)
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{
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this[attr] = _values[attr];
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}
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}
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}
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customElements.define("et2-image", Et2Image)//, {extends: 'img'});
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