export class TextHelper {
  static scaleToFit(textObject, size) {
    if (!size.width) size.width = Infinity;
    if (!size.height) size.height = Infinity;
    if (textObject.style.wordWrap) {
      wordWrapScaleToFit(textObject, size);
    } else {
      nonWordWrapScaleToFit(textObject, size);
    }
  }
}

function wordWrapScaleToFit(textObject, size) {
  textObject.scale.set(1);
  if (!textObject.style.defaultWordWrapWidth) {
    textObject.style.defaultWordWrapWidth = textObject.style.wordWrapWidth;
  }
  textObject.style.wordWrapWidth = textObject.style.defaultWordWrapWidth;
  const scaleStep = 0.99;
  while (size.width < textObject.width || size.height < textObject.height) {
    textObject.scale.set(textObject.scale.x * scaleStep, textObject.scale.y * scaleStep);
    textObject.style.wordWrapWidth = textObject.style.wordWrapWidth / scaleStep;
  }
}

function nonWordWrapScaleToFit(textObject, size) {
  textObject.scale.set(1);
  const factor = Math.min(1, size.width / textObject.width, size.height / textObject.height);
  textObject.scale.set(factor);
}