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358 lines
11 KiB
TypeScript
358 lines
11 KiB
TypeScript
/**
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* EGroupware eTemplate2 - WidgetWithSelectMixin
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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 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 {Et2InputWidget, Et2InputWidgetInterface} from "../Et2InputWidget/Et2InputWidget";
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import {html, LitElement, PropertyValues, render, TemplateResult} from "lit";
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import {property} from "lit/decorators/property.js";
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import {et2_readAttrWithDefault} from "../et2_core_xml";
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import {cleanSelectOptions, find_select_options, SelectOption} from "./FindSelectOptions";
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import {SearchMixinInterface} from "./SearchMixin";
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/**
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* Base class for things that do selectbox type behaviour, to avoid putting too much or copying into read-only
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* selectboxes, also for common handling of properties for more special selectboxes.
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*
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* As with most other widgets that extend Shoelace components, do not override render() without good reason.
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* To extend this mixin, override:
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* - _optionTargetNode(): Return the HTMLElement where the "options" go.
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* - _optionTemplate(option:SelectOption): Renders the option. To use a special widget, use its tag in render.
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* Select option:
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* ```js
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* return html`
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* <option value="${option.value}" title="${option.title}" ?selected=${option.value == this.modelValue}>
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* ${option.label}
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* </option>`;
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* ```
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*
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*
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* or pass it off to a different WebComponent:
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*
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* ```js
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* _optionTemplate(option:SelectOption) : TemplateResult
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* {
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* return html`
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* <special-option-tag .value=${option}></special-option-tag>`;
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* }
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* ```
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*
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* Optionally, you can override:
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* - _emptyLabelTemplate(): How to render the empty label
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* - slots(): Most Lion components have an input slot where the <input> tag is created.
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* You can specify something else, or return {} to do your own thing. This is a little more complicated. You should
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* also override _inputGroupInputTemplate() to do what you normally would in render().
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*
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*/
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// Export the Interface for TypeScript
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type Constructor<T = {}> = new (...args : any[]) => T;
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export const Et2WidgetWithSelectMixin = <T extends Constructor<LitElement>>(superclass : T) =>
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{
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class Et2WidgetWithSelect extends Et2InputWidget(superclass)
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{
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/**
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* The current value of the select, submitted as a name/value pair with form data. When `multiple` is enabled, the
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* value attribute will be a space-delimited list of values based on the options selected, and the value property will
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* be an array.
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*
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@property({
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noAccessor: true,
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converter: {
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fromAttribute: (value : string) => value.split(',')
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}
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})
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value : string | string[] = "";
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*/
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/**
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* Textual label for first row, eg: 'All' or 'None'. It's value will be ''
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*/
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@property({type: String})
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emptyLabel : String = "";
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/**
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* Limit size
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*/
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@property({type: Number, noAccessor: true, reflect: true})
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/**
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* Internal list of possible select options
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*
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* This is where we keep options sent from the server. This is not always the complete list, as extending
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* classes may have their own options to add in. For example, static options are kept separate, as are search
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* results. The select_options getter should give the complete list.
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*/
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private __select_options : SelectOption[] = [];
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/**
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* When we create the select option elements, it takes a while.
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* If we don't wait for them, it causes issues in SlSelect
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*/
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protected _optionRenderPromise : Promise<void> = Promise.resolve();
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/**
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* Options found in the XML when reading the template
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* @type {SelectOption[]}
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* @private
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*/
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private _xmlOptions : SelectOption[] = [];
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constructor(...args : any[])
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{
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super(...args);
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this.__select_options = <SelectOption[]>[];
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}
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async getUpdateComplete() : Promise<boolean>
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{
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const result = await super.getUpdateComplete();
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await this._optionRenderPromise;
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return result;
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}
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/** @param {import('@lion/core').PropertyValues } changedProperties */
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updated(changedProperties : PropertyValues)
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{
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super.updated(changedProperties);
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// If the ID changed (or was just set) and select_options wasn't, find the new select options
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if(changedProperties.has("id") && !changedProperties.has("select_options"))
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{
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const options = find_select_options(this, {}, this._xmlOptions);
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if(options.length)
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{
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this.select_options = options;
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}
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}
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}
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willUpdate(changedProperties : PropertyValues<this>)
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{
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// Add in actual option tags to the DOM based on the new select_options
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if(changedProperties.has('select_options') || changedProperties.has("emptyLabel"))
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{
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// Add in options as children to the target node
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const optionPromise = this._renderOptions();
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// This is needed to display initial load value in some cases, like infolog nm header filters
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if(typeof this.selectionChanged !== "undefined")
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{
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optionPromise.then(async() =>
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{
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await this.updateComplete;
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this.selectionChanged();
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});
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}
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}
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}
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public getValueAsArray()
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{
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if(Array.isArray(this.value))
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{
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return this.value;
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}
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if(this.value == "null" || this.value == null || typeof this.value == "undefined" || !this.emptyLabel && this.value == "")
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{
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return [];
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}
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return [this.value];
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}
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/**
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* Render select_options as child DOM Nodes
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* @protected
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*/
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protected _renderOptions()
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{
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return Promise.resolve();
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// Add in options as children to the target node
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if(!this._optionTargetNode)
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{
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return Promise.resolve();
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}
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/**
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* Doing all this garbage to get the options to always show up.
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* If we just do `render(options, target)`, they only show up in the DOM the first time. If the
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* same option comes back in a subsequent search, map() does not put it into the DOM.
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* If we render into a new target, the options get rendered, but we have to wait for them to be
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* rendered before we can do anything else with them.
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*/
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let temp_target = document.createElement("div");
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let options = html`${this._emptyLabelTemplate()}${this.select_options
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// Filter out empty values if we have empty label to avoid duplicates
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.filter(o => this.emptyLabel ? o.value !== '' : o)
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.map(this._groupTemplate.bind(this))}`;
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render(options, temp_target);
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this._optionRenderPromise = Promise.all(([...temp_target.querySelectorAll(":scope > *")].map(item => item.render)))
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.then(() =>
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{
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this._optionTargetNode.replaceChildren(
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...Array.from(temp_target.querySelectorAll(":scope > *")),
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...Array.from(this._optionTargetNode.querySelectorAll(":scope > [slot]"))
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);
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if(typeof this.handleMenuSlotChange == "function")
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{
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this.handleMenuSlotChange();
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}
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});
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return this._optionRenderPromise;
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}
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/**
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* Set the select options
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*
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* @param new_options
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*/
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set select_options(new_options : SelectOption[])
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{
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const old_options = this.__select_options;
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this.__select_options = cleanSelectOptions(new_options);
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this.requestUpdate("select_options", old_options);
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}
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/**
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* Set select options
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*
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* @deprecated assign to select_options
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* @param new_options
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*/
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set_select_options(new_options : SelectOption[] | { [key : string] : string }[])
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{
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this.select_options = <SelectOption[]>new_options;
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}
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/**
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* Select box options
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*
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* Will be found automatically based on ID and type, or can be set explicitly in the template using
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* <option/> children, or using widget.select_options = SelectOption[]
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*/
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@property({type: Object})
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get select_options() : SelectOption[]
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{
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return this.__select_options;
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}
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/**
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* Get the node where we're putting the options
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*
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* If this were a normal selectbox, this would be just the <select> tag (this._inputNode) but in a more
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* complicated widget, this could be anything.
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*
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* @overridable
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* @returns {HTMLElement}
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*/
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get _optionTargetNode() : HTMLElement
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{
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return <HTMLElement><unknown>this;
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}
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/**
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* Render the "empty label", used when the selectbox does not currently have a value
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*
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* @overridable
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* @returns {TemplateResult}
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*/
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_emptyLabelTemplate() : TemplateResult
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{
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return html`${this.emptyLabel}`;
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}
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/**
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* Render a single option
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*
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* Override this method to specify how to render each option.
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* In a normal selectbox, this would be something like:
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*```
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* <option value="${option.value}" title="${option.title}" ?selected=${option.value == this.modelValue}>
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* ${option.label}
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* </option>`;
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* ```
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* but you can do whatever you need. To use a different WebComponent, just use its tag instead of "option".
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* We should even be able to pass the whole SelectOption across
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* ```
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* <special-option .value=${option}></special-option>
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* ```
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*
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* @overridable
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* @param {SelectOption} option
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* @returns {TemplateResult}
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*/
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protected _optionTemplate(option : SelectOption) : TemplateResult
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{
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return html`
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<span>Override _optionTemplate(). ${option.value} => ${option.label}</span>`;
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}
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_groupTemplate(option) : TemplateResult
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{
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if(!Array.isArray(option.value))
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{
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return this._optionTemplate(option);
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}
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return html`
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<small>${this.noLang ? option.label : this.egw().lang(option.label)}</small>
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${option.value.map(this._optionTemplate.bind(this))}
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<sl-divider></sl-divider>
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`;
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}
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/**
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* Load extra stuff from the template node. In particular, we're looking for any <option/> tags added.
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*
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* @param {Element} _node
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*/
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loadFromXML(_node : Element)
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{
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let new_options = [];
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// Read the option-tags, but if not rendered there won't be any yet so check existing options
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let options = _node.querySelectorAll("option");
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for(let i = 0; i < options.length; i++)
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{
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new_options.push({
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value: et2_readAttrWithDefault(options[i], "value", options[i].textContent),
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// allow options to contain multiple translated sub-strings eg: {Firstname}.{Lastname}
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label: options[i].textContent.replace(/{([^}]+)}/g, (str, p1) =>
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{
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return this.egw().lang(p1);
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}),
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title: et2_readAttrWithDefault(options[i], "title", "")
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});
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}
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this._xmlOptions = new_options;
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if(options.length == 0 && this.__select_options.length)
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{
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// Start with any existing options, (static options from type)
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// Use a copy since we'll probably be modifying it, and we don't want to change for any other
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// widget of the same static type
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new_options = [...this.__select_options];
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}
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if(this.id)
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{
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new_options = find_select_options(this, {}, new_options);
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}
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if(new_options.length)
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{
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this.select_options = new_options;
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}
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}
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}
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return Et2WidgetWithSelect as unknown as Constructor<SearchMixinInterface> & Et2InputWidgetInterface & T;
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} |