import { Directive, ElementRef, OnInit } from '@angular/core';

@Directive({
    selector: '[appHighlight]',
})
export class HighlightDirective implements OnInit {

    _dval = 'green';

    constructor(private _ref: ElementRef) {
    }

    ngOnInit(): void {
        this._ref.nativeElement.style.backgroundColor = this._dval;
    }
}

import { Directive, ElementRef, OnInit } from '@angular/core';

@Directive({
    selector: '[appHighlight]',
    inputs: ["hc"]
})
export class HighlightDirective implements OnInit {

    hc: string;
    _dval = 'green';

    constructor(private _ref: ElementRef) {
    }

    ngOnInit(): void {
        this._ref.nativeElement.style.backgroundColor = this.hc || this._dval;
    }
}

@Input() hc:string;

this._ref.nativeElement.style.backgroundColor=this.hc || this._dval;

<h1 appHighlight [hc]="'red'">
  َApp Works!
</h1>

<h1 appHighlight [hc]="'red'"  [hc2]="....."  [hc3]="....."   ....>
  App Works! 
</h1>

public PdfPCell RenderingCell(CellAttributes attributes)
        {
            var value = attributes.RowData.TableRowData.GetSafeStringValueOf(colName);
            var mainTable = new PdfGrid(1)
            {
                WidthPercentage = 100,
                RunDirection = PdfWriter.RUN_DIRECTION_RTL
            };
            string[] seperatedLine = value.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);
            foreach (var line in seperatedLine)
            {
                mainTable.AddSimpleRow((data, cellProperties) =>
                       {
                           cellProperties.BorderWidth = 1f;
                           cellProperties.BackgroundColor = attributes.BasicProperties.BackgroundColor;
                           data.Value = line.FixWeakCharacters();
                           cellProperties.RunDirection = PdfRunDirection.RightToLeft;
                           cellProperties.CellPadding = 2;
                           cellProperties.PdfFont = attributes.BasicProperties.PdfFont;
                           cellProperties.HorizontalAlignment = HorizontalAlignment.Left;
                       });
            }

            var cell = new PdfPCell
            {
                Border = 1,
                RunDirection = PdfWriter.RUN_DIRECTION_RTL,
                HorizontalAlignment = Element.ALIGN_RIGHT
            };
            cell.AddElement(mainTable);
            return cell;

        }