Function fitText

internal/driver/html/stacks.js:514–532

(t, avail, textList)

  // fitText sets text and font-size clipped to the specified width w.
  function fitText(t, avail, textList) {
    // Find first entry in textList that fits.
    let width = avail;
    textContext.font = FONT_SIZE + 'pt Arial';
    for (let i = 0; i < textList.length; i++) {
      let text = textList[i];
      width = textContext.measureText(text).width;
      if (width <= avail) {
        t.innerText = text;
        return;
      }
    }

    // Try to fit by dropping font size.
    let text = textList[textList.length-1];
    const fs = Math.max(MIN_FONT_SIZE, FONT_SIZE * (avail / width));
    t.style.fontSize = fs + 'pt';
    t.innerText = text;
  }

  // totalValue returns the positive and negative sums of the Values of stacks
  // listed in places.