Change the baseline to center mode of a text on the stroke using Script.

Avec les modifications:

// JavaScript Document
// center_baselineShift.js
// author Landry René
// Sun, 21 December 2025 10:42:03 GMT
/* Select a text
   Center: Align with the point located halfway
   between the ascender and the descender of the font*/
function main() {
  if (selection.length) {
    var texts = [];
        extractTexts(selection,texts);
          if (texts.length) {
            var t, line0, dup, vect, bdDup, h;
            for (var i = 0; i < texts.length; i++) {
              t = texts[i];
              line0 = t.lines[0];
              dup = activeDocument.textFrames.add();
              copieObjtextRange (line0,dup);
              vect = dup.createOutline();
              bdDup = vect.geometricBounds; // visibleBounds
              h = bdDup[1]-bdDup[3];
              vect.remove();
              t.textRange.baselineShift = - h/2;
            }
          }
  }
}
if (app.documents.length) main();
// -------
function copieObjtextRange (obj1,obj2) {
  for (var j = 0; j < obj1.characters.length; j++) {
     if("pjgq,;".indexOf(obj1.characters[j].contents) == -1)
      obj1.characters[j].duplicate(obj2.insertionPoints[obj2.insertionPoints.length-1]);
  }
}
// -------
function extractTexts(s,tabs) {
  if(s.typename == "TextRange") return;
  for(var i = 0; i < s.length; i++){
    if(s[i].typename == "TextFrame" && s[i].locked == false){
      tabs.push(s[i]);
    } else if(s[i].typename == "GroupItem"){
      // Cherche les objets de types TextFrame dans ce groupe, recursivement
      extractTexts(s[i].pageItems, tabs);
    }
  }
}
// -------