InDesign TextPreferences.insetSpacing bug test

ind_bug_pathpoint_anchor_handling.jsx

/*
  フレーム内マージンが設定されたテキストフレーム
  のアンカーの位置を操作するとマージン分余計に動いてしまう
*/
var test = function (doc, opts) {
  var textframe = doc.textFrames.add({
    geometricBounds: opts['frame_bon']
  });

  // フレーム内マージン!!!
  textframe.textFramePreferences.insetSpacing = opts['inset_space'];

  var pathpoints = textframe.paths[0].pathPoints
  for (var i=0, len=pathpoints.length; i < len ; i++) {
    if (pathpoints[i].anchor[0] > opts['frame_bon'][3] - 2) {
      pathpoints[i].anchor = [
        pathpoints[i].anchor[0] + opts['add_to'],
        pathpoints[i].anchor[1]
      ];
    }
  };
  $.writeln("//expect   " + opts['expect'] );
  $.writeln("//actually " + textframe.geometricBounds);
}


var doc = app.documents.add();
var opts;

$.writeln('\ninset spacing is not set to a textframe');
opts = {
  frame_bon: [150,80,160,120],
  inset_space: [0,0,0,0],
  add_to: 10,
  expect: [150,80,160,130],
}
test(doc, opts);

$.writeln('\ninset spacing is set to left&right of a textframe');
opts = {
  frame_bon: [150,80,160,120],
  inset_space: [0,0.4,0,0.1],
  add_to: 10,
  expect: [150,80,160,130],
}
// rightとleftの和が増える
test(doc, opts);
$.writeln('\ninset spacing is set to top&bottom of a textframe');
opts = {
  frame_bon: [150,80,160,120],
  inset_space: [0.3,0,1.2,0],
  add_to: 10,
  expect: [150,80,160,130],
}
// bottomは影響しない？？で topの２倍が減る
test(doc, opts);

$.writeln('\ninset spacing is set to all of a textframe');
opts = {
  frame_bon: [150,80,160,120],
  inset_space: [0.3,0.1,1.2,0.2],
  add_to: 10,
  expect: [150,80,160,130],
}
// topの２倍が減る + rightとleftの和が増える
test(doc, opts);

🤒

inset spacing is not set to a textframe
//expect 150,80,160,130
//actually 150,80,160,130

🤕

inset spacing is set to left&right of a textframe
//expect 150,80,160,130
//actually 150,80,160,130.5

inset spacing is set to top&bottom of a textframe
//expect 150,80,160,130
//actually 150,80,160,129.4

inset spacing is set to all of a textframe
//expect 150,80,160,130
//actually 150,80,160,129.7