fabric.js FixedTextbox

gistfile1.txt

// orginally from here: https://github.com/fabricjs/fabric.js/issues/4000#issue-235260862
class FixedTextbox extends fabric.Textbox {
    _wrapLine(_line, lineIndex, desiredWidth, reservedSpace) {
        const offset = 0;
        let textWidth = this._measureWord(_line, lineIndex, offset);

        if (textWidth > desiredWidth && !this.isEditing) {
            const ellipsis = '…';
            const lengthReducingFactor = desiredWidth / textWidth;
            let length = Math.ceil(_line.length * lengthReducingFactor);
            while (textWidth >= desiredWidth && length > 0) {
                _line = _line.substring(0, length--) + ellipsis;
                textWidth = this._measureWord(_line, lineIndex, offset);
            }
        }

        return super._wrapLine(_line, lineIndex, desiredWidth, reservedSpace);
    }
}