@syncfusion/ej2-pdf/src/pdf/core/graphics/automatic-fields/single-value-field.js

Feature-rich JavaScript PDF library with built-in support for loading and manipulating PDF document.

var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
import { PdfTemplate } from '../pdf-template';
import { PdfDynamicField } from './dynamic-field';
/**
 * Represents an internal dynamic field that maintains a single cached value for rendering.
 *
 * @private
 */
var PdfSingleValueField = /** @class */ (function (_super) {
    __extends(PdfSingleValueField, _super);
    function PdfSingleValueField() {
        return _super !== null && _super.apply(this, arguments) || this;
    }
    /**
     * Initializes the base dynamic field with optional font, brush, and string format settings.
     *
     * @private
     *
     * @param {PdfFont} [font] - The font used for rendering the field text.
     * @param {PdfBrush} [brush] - The brush used to define the text color.
     * @param {PdfStringFormat} [stringFormat] - The format used for text layout and alignment.
     * @returns {void} Does not return a value.
     */
    PdfSingleValueField.prototype._initializeBase = function (font, brush, stringFormat) {
        _super.prototype._initializeBase.call(this, font, brush, stringFormat);
    };
    /**
     * Performs single-value rendering with caching.
     *
     * @private
     * @param {PdfGraphics} graphics The graphics context.
     * @param {Point} location The drawing location.
     * @returns {void} Nothing.
     */
    PdfSingleValueField.prototype._performDraw = function (graphics, location) {
        _super.prototype._performDraw.call(this, graphics, location);
        var value = this._getValue(graphics);
        var page = this._getPageFromGraphics(graphics);
        var doc = (page && page._crossReference) ? page._crossReference._document : null;
        if (!this._template || this._cachedValue !== value || this._cachedDocument !== doc) {
            var font = this._obtainFont();
            var brush = this._obtainBrush();
            var templateSize = this._obtainSize();
            var template = new PdfTemplate({ x: 0, y: 0, width: templateSize.width, height: templateSize.height });
            template.graphics.drawString(value, font, { x: 0, y: 0, width: templateSize.width, height: templateSize.height }, brush);
            this._template = template;
            this._cachedValue = value;
            this._cachedDocument = doc;
        }
        var size = this._obtainSize();
        var bounds = { x: location.x, y: location.y, width: size.width, height: size.height };
        graphics.drawTemplate(this._template, bounds);
    };
    /**
     * Gets the string value produced by this field.
     *
     * @private
     * @param {PdfGraphics} graphics
     * The graphics context used during rendering.
     *
     * @returns {string} The resolved string value for the field.
     */
    // eslint-disable-next-line @typescript-eslint/no-unused-vars
    PdfSingleValueField.prototype._getValue = function (graphics) {
        return '';
    };
    return PdfSingleValueField;
}(PdfDynamicField));
export { PdfSingleValueField };