Function onMouseDown

mini-code-edit/cm/lib/codemirror.js:353–450

(e)

    }

    function onMouseDown(e) {
      setShift(e_prop(e, "shiftKey"));
      // Check whether this is a click in a widget
      for (var n = e_target(e); n != wrapper; n = n.parentNode)
        if (n.parentNode == code && n != mover) return;

      // See if this is a click in the gutter
      for (var n = e_target(e); n != wrapper; n = n.parentNode)
        if (n.parentNode == gutterText) {
          if (options.onGutterClick)
            options.onGutterClick(instance, indexOf(gutterText.childNodes, n) + showingFrom, e);
          return e_preventDefault(e);
        }

      var start = posFromMouse(e);

      switch (e_button(e)) {
      case 3:
        if (gecko && !mac) onContextMenu(e);
        return;
      case 2:
        if (start) setCursor(start.line, start.ch, true);
        setTimeout(focusInput, 20);
        return;
      }
      // For button 1, if it was clicked inside the editor
      // (posFromMouse returning non-null), we have to adjust the
      // selection.
      if (!start) {if (e_target(e) == scroller) e_preventDefault(e); return;}

      if (!focused) onFocus();

      var now = +new Date;
      if (lastDoubleClick && lastDoubleClick.time > now - 400 && posEq(lastDoubleClick.pos, start)) {
        e_preventDefault(e);
        setTimeout(focusInput, 20);
        return selectLine(start.line);
      } else if (lastClick && lastClick.time > now - 400 && posEq(lastClick.pos, start)) {
        lastDoubleClick = {time: now, pos: start};
        e_preventDefault(e);
        return selectWordAt(start);
      } else { lastClick = {time: now, pos: start}; }

      var last = start, going;
      if (options.dragDrop && dragAndDrop && !options.readOnly && !posEq(sel.from, sel.to) &&
          !posLess(start, sel.from) && !posLess(sel.to, start)) {
        // Let the drag handler handle this.
        if (webkit) lineSpace.draggable = true;
        function dragEnd(e2) {
          if (webkit) lineSpace.draggable = false;
          draggingText = false;
          up(); drop();
          if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
            e_preventDefault(e2);
            setCursor(start.line, start.ch, true);
            focusInput();
          }
        }