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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | 1x 137x 130x 137x 137x 58x 137x 141x 137x 137x 137x 44x 44x 16x 16x 16x 16x 31x 51x 181x | /**
* Copyright (c) Siemens 2016 - 2025
* SPDX-License-Identifier: MIT
*/
import {
booleanAttribute,
computed,
Directive,
inject,
input,
Input,
output,
signal,
Signal
} from '@angular/core';
import { ControlValueAccessor } from '@angular/forms';
import {
SI_SELECT_OPTIONS_STRATEGY,
SiSelectOptionsStrategy
} from '../options/si-select-options-strategy';
/**
* Selection strategy base class.
*/
@Directive({
host: {
'[class.disabled]': 'disabled()'
}
})
export abstract class SiSelectSelectionStrategy<T, IV = T | T[]> implements ControlValueAccessor {
/**
* Whether the select input is disabled.
*
* @defaultValue false
*/
// eslint-disable-next-line @angular-eslint/no-input-rename
readonly disabledInput = input(false, { alias: 'disabled', transform: booleanAttribute });
/**
* The selected value(s).
*/
@Input() set value(value: IV | undefined) {
this.updateFromInput(this.toArrayValue(value));
}
/** Emitted when the selection is changed */
readonly valueChange = output<IV>();
/**
* Whether the select control allows to select multiple values.
* @internal
*/
abstract readonly allowMultiple: boolean;
/**
* Provides the internal value always as an array
* @internal
*/
readonly arrayValue: Signal<readonly T[]> = computed(() =>
this.selectOptions.selectedRows().map(option => option.value)
);
/**
* Registered form callback which shall be called on blur.
* @internal
*/
onTouched: () => void = () => {};
/** @internal */
public readonly disabled = computed(() => this.disabledInput() || this.disabledNgControl());
protected onChange: (_: any) => void = () => {};
private readonly disabledNgControl = signal(false);
private readonly selectOptions = inject<SiSelectOptionsStrategy<T>>(SI_SELECT_OPTIONS_STRATEGY);
registerOnTouched(fn: any): void {
this.onTouched = fn;
}
registerOnChange(fn: any): void {
this.onChange = fn;
}
/**
* CDK Listbox value changed handler.
* @internal
*/
updateFromUser(values: T[]): void {
const parsedValue = this.fromArrayValue(values);
this.onChange(parsedValue);
this.valueChange.emit(parsedValue);
this.selectOptions.onValueChange(values);
}
setDisabledState(isDisabled: boolean): void {
this.disabledNgControl.set(isDisabled);
}
writeValue(obj: any): void {
this.updateFromInput(this.toArrayValue(obj));
}
protected abstract toArrayValue(value: IV | undefined): readonly T[];
protected abstract fromArrayValue(value: readonly T[]): IV;
private updateFromInput(values: readonly T[]): void {
this.selectOptions.onValueChange(values);
}
}
|