Function measureCharPrepared

tools/pythonauto/static/codemirrorepl/codemirror.js:1538–1554

(cm, prepared, ch, bias)

  // Given a prepared measurement object, measures the position of an
  // actual character (or fetches it from the cache).
  function measureCharPrepared(cm, prepared, ch, bias) {
    if (prepared.before) ch = -1;
    var key = ch + (bias || ""), found;
    if (prepared.cache.hasOwnProperty(key)) {
      found = prepared.cache[key];
    } else {
      if (!prepared.rect)
        prepared.rect = prepared.view.text.getBoundingClientRect();
      if (!prepared.hasHeights) {
        ensureLineHeights(cm, prepared.view, prepared.rect);
        prepared.hasHeights = true;
      }
      found = measureCharInner(cm, prepared, ch, bias);
      if (!found.bogus) prepared.cache[key] = found;
    }
    return {left: found.left, right: found.right, top: found.top, bottom: found.bottom};
  }

  var nullRect = {left: 0, right: 0, top: 0, bottom: 0};