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285 lines
8.5 KiB
TypeScript
285 lines
8.5 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, repeat, TemplateResult} from "@lion/core";
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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 Lion components, do not override render().
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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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* Technical note:
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* LionSelect (and any other LionField) use slots to wrap a real DOM node. ET2 doesn't expect this,
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* so we have to create the input node (via slots()) and respect that it is _external_ to the Web Component.
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* This complicates things like adding the options, since we can't just override _inputGroupInputTemplate()
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* and include them when rendering - the parent expects to find the <select> added via a slot, render() would
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* put it inside the shadowDOM. That's fine, but then it doesn't get created until render(), and the parent
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* (LionField) can't find it when it looks for it before then.
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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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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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* Textual label for first row, eg: 'All' or 'None'. It's value will be ''
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*/
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emptyLabel: String,
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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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select_options: {type: Object, noAccessor: true},
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/**
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* Limit size
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*/
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rows: {type: Number, noAccessor: true, reflect: true}
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}
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}
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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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/** @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) find the select options
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if(changedProperties.has("id"))
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{
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const options = find_select_options(this, {}, this._xmlOptions);
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if (options.length) this.select_options = options;
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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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this._renderOptions();
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if(this.handleMenuSlotChange)
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{
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this.handleMenuSlotChange();
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}
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}
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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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// Add in options as children to the target node
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if(this._optionTargetNode)
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{
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render(html`${this._emptyLabelTemplate()}
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${repeat(<SelectOption[]>this.select_options, (option : SelectOption) => option.value, this._optionTemplate.bind(this))}`,
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this._optionTargetNode
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);
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}
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}
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/**
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* Overwritten as sometimes called before this._inputNode is available
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*
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* @param {*} v - modelValue: can be an Object, Number, String depending on the
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* input type(date, number, email etc)
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* @returns {string} formattedValue
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*/
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formatter(v)
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{
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if (!this._inputNode)
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{
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return v;
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}
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return super.formatter(v);
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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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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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_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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/**
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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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} |