#include <raleigh/w/vbox.h>

namespace raleigh {
  vbox::vbox(dllist<widget &> widgets) : widgets(widgets) {
    uint32_t w = 0, h = 0;
    for (dllist<widget &>::node *n = widgets.first; n; n = n->next) {
      n->d.parent = this;
      h += n->d.size.y;
      if (n->d.size.x > w)
        w = n->d.size.x;
    }
    size = coord(w, h);
    closest_opaque = 0;
  }

  void vbox::notify_window_change() {
    uint32_t h = window_offset.y;
    for (dllist<widget &>::node *n = widgets.first; n; n = n->next) {
      n->d.w = w;
      n->d.window_offset = coord(window_offset.x + size.x / 2 - n->d.size.x / 2, h);
      n->d.notify_window_change();
      h += n->d.size.y;
    }
  }

  void vbox::paint(_pixel_t *pixbuf, uint32_t pitch) {
    for (dllist<widget &>::node *n = widgets.first; n; n = n->next)
      n->d.paint(pixbuf, pitch);
  }

  void vbox::handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) {
    uint32_t h = window_offset.y;
    dllist<widget &>::node *n = widgets.first;
    while (h + n->d.size.y <= window_coords.y) {
      h += n->d.size.y;
      n = n->next;
    }
    if ((window_coords.x >= n->d.window_offset.x) &&
        (window_coords.x < n->d.window_offset.x + n->d.size.x))
      n->d.handle_click(window_coords, click_type, up);
  }

  void vbox::notify_has_opaque_parent(widget *parent) {
    closest_opaque = parent;
    for (dllist<widget &>::node *n = widgets.first; n; n = n->next)
      n->d.notify_has_opaque_parent(parent);
  }

  void vbox::notify_child_size_change(widget &from, coord old_size) {
    if ((old_size.y == from.size.y) && (from.size.x <= size.x)) {
      from.window_offset.x = window_offset.x + size.x / 2 - from.size.x / 2;
      from.notify_window_change();
    }

    else {//lazy, less efficient approach
      uint32_t h = 0, w = 0;
      for (dllist<widget &>::node *n = widgets.first; n; n = n->next) {
        h += n->d.size.y;
        if (n->d.size.x > w)
          w = n->d.size.x;
      }
      set_size(coord(w, h));
      notify_window_change();
    }
  }

  void vbox::on_mouse_move(coord window_coords) {
    for (dllist<widget &>::node *n = widgets.first; n; n = n->next)
      if ((window_coords.x >= n->d.window_offset.x) &&
          (window_coords.y >= n->d.window_offset.y) &&
          (window_coords.x < n->d.window_offset.x + n->d.size.x) &&
          (window_coords.y < n->d.window_offset.y + n->d.size.y)) {
        n->d.on_mouse_move(window_coords);
        return;
      }
  }
}