tf.mm

long goodWidthForColumn(TColumnViewPtr self, NSInteger column) {
  NSBrowserTableViewPtrOrNil browserTable = [self browserTableViewAtIndex:column];
  if (!browserTable) {
    AUTO_LOG(@"no browser table => bail out");
    return 0;
  }
  auto numberOfRows = [browserTable numberOfRows];
  if (numberOfRows == 0) {
    AUTO_LOG(@"column=%ld numberOfRows=%ld => bail out", column, numberOfRows);
    return 0;
  }
  TColumnViewControllerPtr controller = [self controller];
  if (!controller) {
    AUTO_LOG(@"no controller => bail out");
    return 0;
  }

  auto width = [controller sizeToFitWidthOfColumn:column forRange:NSMakeRange(0, numberOfRows)];
  AUTO_LOG(@"column=%ld numberOfRows=%ld width=%f", column, numberOfRows, width);

  // ad-hoc 20px addition to really make sure nothing remains shortened, sizeToFitWidthOfColumn probably does not reflect scrollbars
  // this can be tricky because width measurement is affected by System Preferences -> General -> scrollbar settings and also by Finder's state,
  // for example if you are in a drobox folder, those file badge icons take up some extra space, sizeToFitWidthOfColumn does not account for that
  // and Finder (10.11) itself behaves inconsistently (when double-clicking on resizing gripper)
  // see support email from Colin Callahan <***redacted***@***.com>
  int correction = intAutoWidthCorrection();
  if (!correction) {
    correction = 20;  // default correction
  }
  width += correction;

  width = [PLUGIN $clampWidth:width];
  return width;
}