@babylonjs/gui/2D/controls/textWrapper.js

Babylon.js GUI module =====================

/** @internal */
export class TextWrapper {
    get text() {
        return this._characters ? this._characters.join("") : this._text;
    }
    set text(txt) {
        this._text = txt;
        this._characters = Array.from && Array.from(txt);
    }
    get length() {
        return this._characters ? this._characters.length : this._text.length;
    }
    removePart(idxStart, idxEnd, insertTxt) {
        this._text = this._text.slice(0, idxStart) + (insertTxt ? insertTxt : "") + this._text.slice(idxEnd);
        if (this._characters) {
            const newCharacters = insertTxt ? Array.from(insertTxt) : [];
            this._characters.splice(idxStart, idxEnd - idxStart, ...newCharacters);
        }
    }
    charAt(idx) {
        return this._characters ? this._characters[idx] : this._text.charAt(idx);
    }
    substr(from, length) {
        if (this._characters) {
            if (isNaN(from)) {
                from = 0;
            }
            else if (from >= 0) {
                from = Math.min(from, this._characters.length);
            }
            else {
                from = this._characters.length + Math.max(from, -this._characters.length);
            }
            if (length === undefined) {
                length = this._characters.length - from;
            }
            else if (isNaN(length)) {
                length = 0;
            }
            else if (length < 0) {
                length = 0;
            }
            const temp = [];
            while (--length >= 0) {
                temp[length] = this._characters[from + length];
            }
            return temp.join("");
        }
        return this._text.substring(from, length ? length + from : undefined);
    }
    substring(from, to) {
        if (this._characters) {
            if (isNaN(from)) {
                from = 0;
            }
            else if (from > this._characters.length) {
                from = this._characters.length;
            }
            else if (from < 0) {
                from = 0;
            }
            if (to === undefined) {
                to = this._characters.length;
            }
            else if (isNaN(to)) {
                to = 0;
            }
            else if (to > this._characters.length) {
                to = this._characters.length;
            }
            else if (to < 0) {
                to = 0;
            }
            const temp = [];
            let idx = 0;
            while (from < to) {
                temp[idx++] = this._characters[from++];
            }
            return temp.join("");
        }
        return this._text.substring(from, to);
    }
    isWord(index) {
        const rWord = /\w/g;
        return this._characters ? this._characters[index].search(rWord) !== -1 : this._text.search(rWord) !== -1;
    }
}
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