Function findPosH

mini-code-editor/cm/lib/codemirror.js:1249–1277

(dir, unit)

    }

    function findPosH(dir, unit) {
      var end = sel.inverted ? sel.from : sel.to, line = end.line, ch = end.ch;
      var lineObj = getLine(line);
      function findNextLine() {
        for (var l = line + dir, e = dir < 0 ? -1 : doc.size; l != e; l += dir) {
          var lo = getLine(l);
          if (!lo.hidden) { line = l; lineObj = lo; return true; }
        }
      }
      function moveOnce(boundToLine) {
        if (ch == (dir < 0 ? 0 : lineObj.text.length)) {
          if (!boundToLine && findNextLine()) ch = dir < 0 ? lineObj.text.length : 0;
          else return false;
        } else ch += dir;
        return true;
      }
      if (unit == "char") moveOnce();
      else if (unit == "column") moveOnce(true);
      else if (unit == "word") {
        var sawWord = false;
        for (;;) {
          if (dir < 0) if (!moveOnce()) break;
          if (isWordChar(lineObj.text.charAt(ch))) sawWord = true;
          else if (sawWord) {if (dir < 0) {dir = 1; moveOnce();} break;}
          if (dir > 0) if (!moveOnce()) break;
        }
      }
      return {line: line, ch: ch};
    }
    function moveH(dir, unit) {
      var pos = dir < 0 ? sel.from : sel.to;
      if (shiftSelecting || posEq(sel.from, sel.to)) pos = findPosH(dir, unit);