@ngqp/core
Version:
87 lines • 11 kB
JavaScript
import { Directive, ElementRef, forwardRef, HostListener, Renderer2 } from '@angular/core';
import { NG_VALUE_ACCESSOR } from '@angular/forms';
/** @ignore */
const NGQP_MULTI_SELECT_VALUE_ACCESSOR = {
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => MultiSelectControlValueAccessorDirective),
multi: true
};
/** @ignore */
export class MultiSelectControlValueAccessorDirective {
constructor(renderer, elementRef) {
this.renderer = renderer;
this.elementRef = elementRef;
this.selectedIds = [];
this.options = new Map();
this.optionMap = new Map();
this.idCounter = 0;
this.fnChange = (_) => { };
this.fnTouched = () => { };
}
onChange() {
this.selectedIds = Array.from(this.options.entries())
.filter(([id, option]) => option.selected)
.map(([id]) => id);
const values = this.selectedIds.map(id => this.optionMap.get(id));
this.fnChange(values);
}
onTouched() {
this.fnTouched();
}
writeValue(values) {
values = values === null ? [] : values;
if (!Array.isArray(values)) {
throw new Error(`Provided a non-array value to select[multiple]: ${values}`);
}
this.selectedIds = values
.map(value => this.getOptionId(value))
.filter((id) => id !== null);
this.options.forEach((option, id) => option.selected = this.selectedIds.includes(id));
}
registerOnChange(fn) {
this.fnChange = fn;
}
registerOnTouched(fn) {
this.fnTouched = fn;
}
setDisabledState(isDisabled) {
this.renderer.setProperty(this.elementRef.nativeElement, 'disabled', isDisabled);
}
registerOption(option) {
const newId = (this.idCounter++).toString();
this.options.set(newId, option);
return newId;
}
deregisterOption(id) {
this.optionMap.delete(id);
}
updateOptionValue(id, value) {
this.optionMap.set(id, value);
if (this.selectedIds.includes(id)) {
this.onChange();
}
}
getOptionId(value) {
for (const id of Array.from(this.optionMap.keys())) {
if (this.optionMap.get(id) === value) {
return id;
}
}
return null;
}
}
MultiSelectControlValueAccessorDirective.decorators = [
{ type: Directive, args: [{
selector: 'select[multiple][queryParamName],select[multiple][queryParam]',
providers: [NGQP_MULTI_SELECT_VALUE_ACCESSOR],
},] }
];
MultiSelectControlValueAccessorDirective.ctorParameters = () => [
{ type: Renderer2 },
{ type: ElementRef }
];
MultiSelectControlValueAccessorDirective.propDecorators = {
onChange: [{ type: HostListener, args: ['change',] }],
onTouched: [{ type: HostListener, args: ['blur',] }]
};
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<T[]>[] : values;\n        if (!Array.isArray(values)) {\n            throw new Error(`Provided a non-array value to select[multiple]: ${values}`);\n        }\n\n        this.selectedIds = values\n            .map(value => this.getOptionId(value))\n            .filter((id: string | null): id is string => id !== null);\n        this.options.forEach((option, id) => option.selected = this.selectedIds.includes(id));\n    }\n\n    public registerOnChange(fn: any) {\n        this.fnChange = fn;\n    }\n\n    public registerOnTouched(fn: any) {\n        this.fnTouched = fn;\n    }\n\n    public setDisabledState(isDisabled: boolean) {\n        this.renderer.setProperty(this.elementRef.nativeElement, 'disabled', isDisabled);\n    }\n\n    public registerOption(option: MultiSelectOptionDirective<T>): string {\n        const newId = (this.idCounter++).toString();\n        this.options.set(newId, option);\n        return newId;\n    }\n\n    public deregisterOption(id: string): void {\n        this.optionMap.delete(id);\n    }\n\n    public updateOptionValue(id: string, value: T): void {\n        this.optionMap.set(id, value);\n        if (this.selectedIds.includes(id)) {\n            this.onChange();\n        }\n    }\n\n    private getOptionId(value: T): string | null {\n        for (const id of Array.from(this.optionMap.keys())) {\n            if (this.optionMap.get(id) === value) {\n                return id;\n            }\n        }\n\n        return null;\n    }\n\n}"]}