MOUSE_BUTTON_1
if (MOUSE_BUTTONS(m->b) != MOUSE_BUTTON_1)
MOUSE_BUTTONS(m->b) != MOUSE_BUTTON_1 ||
if (MOUSE_BUTTONS(m->lb) == MOUSE_BUTTON_1)
if (MOUSE_BUTTONS(b) == MOUSE_BUTTON_1)
if (m == NULL || MOUSE_BUTTONS(m->b) != MOUSE_BUTTON_1 ||
MOUSE_BUTTONS(m->b) == MOUSE_BUTTON_1 && !MOUSE_DRAG(m->b) &&
MOUSE_BUTTONS(m->b) != MOUSE_BUTTON_1 ||