@angular/material/esm2015/core/line/line.js

Angular Material

/**
 * @fileoverview added by tsickle
 * Generated from: src/material/core/line/line.ts
 * @suppress {checkTypes,constantProperty,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { NgModule, Directive, } from '@angular/core';
import { startWith } from 'rxjs/operators';
import { MatCommonModule } from '../common-behaviors/common-module';
/**
 * Shared directive to count lines inside a text area, such as a list item.
 * Line elements can be extracted with a \@ContentChildren(MatLine) query, then
 * counted by checking the query list's length.
 */
export class MatLine {
}
MatLine.decorators = [
    { type: Directive, args: [{
                selector: '[mat-line], [matLine]',
                host: { 'class': 'mat-line' }
            },] }
];
/**
 * Helper that takes a query list of lines and sets the correct class on the host.
 * \@docs-private
 * @param {?} lines
 * @param {?} element
 * @return {?}
 */
export function setLines(lines, element) {
    // Note: doesn't need to unsubscribe, because `changes`
    // gets completed by Angular when the view is destroyed.
    lines.changes.pipe(startWith(lines)).subscribe((/**
     * @param {?} __0
     * @return {?}
     */
    ({ length }) => {
        setClass(element, 'mat-2-line', false);
        setClass(element, 'mat-3-line', false);
        setClass(element, 'mat-multi-line', false);
        if (length === 2 || length === 3) {
            setClass(element, `mat-${length}-line`, true);
        }
        else if (length > 3) {
            setClass(element, `mat-multi-line`, true);
        }
    }));
}
/**
 * Adds or removes a class from an element.
 * @param {?} element
 * @param {?} className
 * @param {?} isAdd
 * @return {?}
 */
function setClass(element, className, isAdd) {
    /** @type {?} */
    const classList = element.nativeElement.classList;
    isAdd ? classList.add(className) : classList.remove(className);
}
/**
 * Helper that takes a query list of lines and sets the correct class on the host.
 * \@docs-private
 * @deprecated Use `setLines` instead.
 * \@breaking-change 8.0.0
 */
export class MatLineSetter {
    /**
     * @param {?} lines
     * @param {?} element
     */
    constructor(lines, element) {
        setLines(lines, element);
    }
}
export class MatLineModule {
}
MatLineModule.decorators = [
    { type: NgModule, args: [{
                imports: [MatCommonModule],
                exports: [MatLine, MatCommonModule],
                declarations: [MatLine],
            },] }
];
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