@itwin/core-common
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iTwin.js components common to frontend and backend
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JavaScript
/*---------------------------------------------------------------------------------------------
* Copyright (c) Bentley Systems, Incorporated. All rights reserved.
* See LICENSE.md in the project root for license terms and full copyright notice.
*--------------------------------------------------------------------------------------------*/
/** @packageDocumentation
* @module Geometry
*/
import { Point3d, Vector3d, YawPitchRollAngles } from "@itwin/core-geometry";
/** A single line of text, all with the same font, styles (underline, bold, italic), and size.
* This class also holds the origin and direction for the text.
* A paragraph is composed of one or more instances of TextStrings.
* @public
*/
export class TextString {
/** Text string */
text;
/** FontId for this TextString. FontIds are mapped to font names and types via the FontMap */
font;
/* text height, in meters */
height;
/* width / height ratio. Default is 1.0 */
widthFactor;
/** bold text. Default is false */
bold;
/** italic text. Default is false */
italic;
/** underline text. Default is false */
underline;
/** position relative to element's placement */
origin;
/** Rotation relative to element's placement */
rotation;
get width() { return this.height * (this.widthFactor ? this.widthFactor : 1.0); }
constructor(props) {
this.text = props.text;
this.font = props.font;
this.height = props.height;
this.widthFactor = props.widthFactor;
this.bold = props.bold;
this.italic = props.italic;
this.underline = props.underline;
this.origin = Point3d.fromJSON(props.origin);
this.rotation = YawPitchRollAngles.fromJSON(props.rotation);
}
toJSON() {
const props = {
text: this.text,
font: this.font,
height: this.height,
widthFactor: this.widthFactor,
bold: this.bold,
italic: this.italic,
underline: this.underline,
};
if (!this.origin.isAlmostZero) {
props.origin = this.origin.toJSON();
}
if (!this.rotation.isIdentity()) {
props.rotation = this.rotation.toJSON();
}
return props;
}
transformInPlace(transform) {
const newOrigin = transform.multiplyPoint3d(this.origin, this.origin);
const newTransform = this.rotation.toMatrix3d().multiplyMatrixTransform(transform);
const scales = new Vector3d();
if (!newTransform.matrix.normalizeColumnsInPlace(scales))
return false;
const newRotation = YawPitchRollAngles.createFromMatrix3d(newTransform.matrix);
if (undefined === newRotation)
return false;
const newHeight = this.height * scales.y;
const newWidth = this.width * scales.x;
if (newHeight < 1.0e-10 || newWidth < 1.0e-10)
return false;
this.origin.setFrom(newOrigin);
this.rotation.setFrom(newRotation);
this.height = newHeight;
this.widthFactor = (newHeight === newWidth ? undefined : (newWidth / newHeight));
return true;
}
}
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