import { ChangeDetectionStrategy, Component, Directive, inject, Input, NgZone, ViewEncapsulation, } from '@angular/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
import { WaMutationObserverService, WA_MUTATION_OBSERVER_INIT, } from '@ng-web-apis/mutation-observer';
import { WaResizeObserverService } from '@ng-web-apis/resize-observer';
import { tuiZonefree } from '@taiga-ui/cdk/observables';
import { tuiInjectElement } from '@taiga-ui/cdk/utils/dom';
import { tuiWithStyles } from '@taiga-ui/cdk/utils/miscellaneous';
import { filter, fromEvent, merge } from 'rxjs';
import * as i0 from "@angular/core";
const BUFFER = 1; // buffer for rounding issues
class TuiFadeStyles {
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiFadeStyles, deps: [], target: i0.ɵɵFactoryTarget.Component }); }
    static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "16.2.12", type: TuiFadeStyles, isStandalone: true, selector: "ng-component", host: { classAttribute: "tui-fade-styles" }, ngImport: i0, template: '', isInline: true, styles: ["[tuiFade]{scrollbar-width:none;-ms-overflow-style:none;transition-property:-webkit-mask-position;transition-property:mask-position;transition-property:mask-position,-webkit-mask-position;transition-duration:var(--tui-duration, .3s);transition-timing-function:ease-in-out;overflow:auto;text-overflow:unset!important;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat}[tuiFade]::-webkit-scrollbar,[tuiFade]::-webkit-scrollbar-thumb{display:none}[tuiFade]:not([data-orientation=vertical]){overflow-y:hidden;-webkit-mask-image:linear-gradient(to right,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(to left,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(#000,#000);mask-image:linear-gradient(to right,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(to left,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(#000,#000);-webkit-mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top;mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top;-webkit-mask-size:calc(51% + var(--t-fade-size) + var(--t-fade-offset)) var(--t-line-height, 100%),calc(50% + var(--t-fade-size) + var(--t-fade-offset)) var(--t-line-height, 100%),100% calc(100% - var(--t-line-height, 100%));mask-size:calc(51% + var(--t-fade-size) + var(--t-fade-offset)) var(--t-line-height, 100%),calc(50% + var(--t-fade-size) + var(--t-fade-offset)) var(--t-line-height, 100%),100% calc(100% - var(--t-line-height, 100%))}[tuiFade]:not([data-orientation=vertical])._start{-webkit-mask-position:left bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top;mask-position:left bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top}[tuiFade]:not([data-orientation=vertical])._end{-webkit-mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,right bottom,top;mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,right bottom,top}[tuiFade]:not([data-orientation=vertical])._start._end{-webkit-mask-position:left bottom,right bottom,top;mask-position:left bottom,right bottom,top}[dir=rtl] [tuiFade]:not([data-orientation=vertical])._end{-webkit-mask-position:left bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top;mask-position:left bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top}[dir=rtl] [tuiFade]:not([data-orientation=vertical])._start{-webkit-mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,right bottom,top;mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,right bottom,top}[dir=rtl] [tuiFade]:not([data-orientation=vertical])._start._end{-webkit-mask-position:left bottom,right bottom,top;mask-position:left bottom,right bottom,top}[tuiFade][data-orientation=vertical]{overflow-x:hidden;-webkit-mask-image:linear-gradient(to bottom,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(to top,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset)));mask-image:linear-gradient(to bottom,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(to top,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset)));-webkit-mask-position:left calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px),left calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px);mask-position:left calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px),left calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px);-webkit-mask-size:100% calc(51% + var(--t-fade-size) + var(--t-fade-offset));mask-size:100% calc(51% + var(--t-fade-size) + var(--t-fade-offset))}[tuiFade][data-orientation=vertical]._start{-webkit-mask-position:left top,left calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px);mask-position:left top,left calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px)}[tuiFade][data-orientation=vertical]._end{-webkit-mask-position:left calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px),left bottom;mask-position:left calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px),left bottom}[tuiFade][data-orientation=vertical]._start._end{-webkit-mask-position:left top,left bottom;mask-position:left top,left bottom}\n"], changeDetection: i0.ChangeDetectionStrategy.OnPush, encapsulation: i0.ViewEncapsulation.None }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiFadeStyles, decorators: [{
            type: Component,
            args: [{ standalone: true, template: '', encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, host: {
                        class: 'tui-fade-styles',
                    }, styles: ["[tuiFade]{scrollbar-width:none;-ms-overflow-style:none;transition-property:-webkit-mask-position;transition-property:mask-position;transition-property:mask-position,-webkit-mask-position;transition-duration:var(--tui-duration, .3s);transition-timing-function:ease-in-out;overflow:auto;text-overflow:unset!important;-webkit-mask-repeat:no-repeat;mask-repeat:no-repeat}[tuiFade]::-webkit-scrollbar,[tuiFade]::-webkit-scrollbar-thumb{display:none}[tuiFade]:not([data-orientation=vertical]){overflow-y:hidden;-webkit-mask-image:linear-gradient(to right,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(to left,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(#000,#000);mask-image:linear-gradient(to right,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(to left,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(#000,#000);-webkit-mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top;mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top;-webkit-mask-size:calc(51% + var(--t-fade-size) + var(--t-fade-offset)) var(--t-line-height, 100%),calc(50% + var(--t-fade-size) + var(--t-fade-offset)) var(--t-line-height, 100%),100% calc(100% - var(--t-line-height, 100%));mask-size:calc(51% + var(--t-fade-size) + var(--t-fade-offset)) var(--t-line-height, 100%),calc(50% + var(--t-fade-size) + var(--t-fade-offset)) var(--t-line-height, 100%),100% calc(100% - var(--t-line-height, 100%))}[tuiFade]:not([data-orientation=vertical])._start{-webkit-mask-position:left bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top;mask-position:left bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top}[tuiFade]:not([data-orientation=vertical])._end{-webkit-mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,right bottom,top;mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,right bottom,top}[tuiFade]:not([data-orientation=vertical])._start._end{-webkit-mask-position:left bottom,right bottom,top;mask-position:left bottom,right bottom,top}[dir=rtl] [tuiFade]:not([data-orientation=vertical])._end{-webkit-mask-position:left bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top;mask-position:left bottom,calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px) bottom,top}[dir=rtl] [tuiFade]:not([data-orientation=vertical])._start{-webkit-mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,right bottom,top;mask-position:calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px) bottom,right bottom,top}[dir=rtl] [tuiFade]:not([data-orientation=vertical])._start._end{-webkit-mask-position:left bottom,right bottom,top;mask-position:left bottom,right bottom,top}[tuiFade][data-orientation=vertical]{overflow-x:hidden;-webkit-mask-image:linear-gradient(to bottom,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(to top,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset)));mask-image:linear-gradient(to bottom,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset))),linear-gradient(to top,transparent var(--t-fade-offset),#000 calc(var(--t-fade-size) + var(--t-fade-offset)));-webkit-mask-position:left calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px),left calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px);mask-position:left calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px),left calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px);-webkit-mask-size:100% calc(51% + var(--t-fade-size) + var(--t-fade-offset));mask-size:100% calc(51% + var(--t-fade-size) + var(--t-fade-offset))}[tuiFade][data-orientation=vertical]._start{-webkit-mask-position:left top,left calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px);mask-position:left top,left calc(100% + var(--t-fade-size) + var(--t-fade-offset) - 1px)}[tuiFade][data-orientation=vertical]._end{-webkit-mask-position:left calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px),left bottom;mask-position:left calc(-1 * var(--t-fade-size) - var(--t-fade-offset) + 1px),left bottom}[tuiFade][data-orientation=vertical]._start._end{-webkit-mask-position:left top,left bottom;mask-position:left top,left bottom}\n"] }]
        }] });
class TuiFade {
    constructor() {
        // TODO: Remove when lh CSS units are supported: https://caniuse.com/mdn-css_types_length_lh
        this.lineHeight = null;
        this.size = '1.5em';
        this.offset = '0em';
        this.orientation = 'horizontal';
        const el = tuiInjectElement();
        // TODO: Replace with TuiTransitioned when fixed:
        // https://github.com/angular/angular/issues/57846
        inject(NgZone).runOutsideAngular(() => {
            setTimeout(() => {
                el.style.transition = '';
            });
        });
        tuiWithStyles(TuiFadeStyles);
        merge(inject(WaResizeObserverService, { self: true }), inject(WaMutationObserverService, { self: true }), fromEvent(el, 'scroll'))
            .pipe(filter(() => !!el.scrollWidth), tuiZonefree(), takeUntilDestroyed())
            .subscribe(() => {
            el.classList.toggle('_end', this.isEnd(el));
            el.classList.toggle('_start', !!Math.floor(el.scrollLeft) || !!Math.floor(el.scrollTop));
        });
    }
    isEnd({ scrollTop, scrollLeft, scrollHeight, scrollWidth, clientHeight, clientWidth, }) {
        return this.orientation === 'vertical'
            ? Math.round(scrollTop) < scrollHeight - clientHeight - BUFFER
            : Math.ceil(Math.abs(scrollLeft)) < scrollWidth - clientWidth - BUFFER ||
                // horizontal multiline fade can kick in early due to hanging elements of fonts so using bigger buffer
                scrollHeight > clientHeight + 4 * BUFFER;
    }
    static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiFade, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
    static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.2.12", type: TuiFade, isStandalone: true, selector: "[tuiFade]", inputs: { lineHeight: ["tuiFadeHeight", "lineHeight"], size: ["tuiFadeSize", "size"], offset: ["tuiFadeOffset", "offset"], orientation: ["tuiFade", "orientation"] }, host: { properties: { "style.line-height": "lineHeight", "style.--t-line-height": "lineHeight", "style.--t-fade-size": "size", "style.--t-fade-offset": "offset", "attr.data-orientation": "orientation", "style.transition": "\"none\"" } }, providers: [
            WaResizeObserverService,
            WaMutationObserverService,
            {
                provide: WA_MUTATION_OBSERVER_INIT,
                useValue: { characterData: true, subtree: true },
            },
        ], ngImport: i0 }); }
}
export { TuiFade };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: TuiFade, decorators: [{
            type: Directive,
            args: [{
                    standalone: true,
                    selector: '[tuiFade]',
                    providers: [
                        WaResizeObserverService,
                        WaMutationObserverService,
                        {
                            provide: WA_MUTATION_OBSERVER_INIT,
                            useValue: { characterData: true, subtree: true },
                        },
                    ],
                    host: {
                        '[style.line-height]': 'lineHeight',
                        '[style.--t-line-height]': 'lineHeight',
                        '[style.--t-fade-size]': 'size',
                        '[style.--t-fade-offset]': 'offset',
                        '[attr.data-orientation]': 'orientation',
                        '[style.transition]': '"none"',
                    },
                }]
        }], ctorParameters: function () { return []; }, propDecorators: { lineHeight: [{
                type: Input,
                args: ['tuiFadeHeight']
            }], size: [{
                type: Input,
                args: ['tuiFadeSize']
            }], offset: [{
                type: Input,
                args: ['tuiFadeOffset']
            }], orientation: [{
                type: Input,
                args: ['tuiFade']
            }] } });
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