function computeLayout()

in sapp/ui/frontend/src/Source.js [110:152]

• 38 lines of code
• 4 McCabe index (conditional complexity)

function computeLayout(
  ranges: Array<Range>,
  lines: $ReadOnlyArray<string>,
): Layout {
  if (ranges.length === 0) {
    return {totalLines: 10, folds: []};
  }

  var totalLines = Math.max(
    ranges[ranges.length - 1].from.line - ranges[0].from.line + 3,
    10,
  );

  var folds = [];

  const foldingThreshold = 10;
  const padding = 1;

  for (var index = 0; index < ranges.length - 1; index++) {
    const distance = ranges[index + 1].from.line - ranges[index].from.line;
    const foldSize = distance - 2 * padding;
    if (distance > foldingThreshold) {
      const startLine = ranges[index].from.line + padding;
      const endLine = startLine + foldSize;
      folds.push({
        line: startLine,
        range: {
          from: {
            line: startLine,
            ch: lines[startLine].length,
          },
          to: {
            line: endLine,
            ch: lines[endLine].length,
          },
        },
      });
      totalLines = totalLines - foldSize + linesPerFold;
    }
  }

  return {totalLines, folds};
}