// 12 april 2015
#include "uipriv_windows.h"

// from http://msdn.microsoft.com/en-us/library/windows/desktop/bb226818%28v=vs.85%29.aspx
#define tabMargin 7

static void tabPreferredSize(uiControl *c, uiSizing *d, intmax_t *width, intmax_t *height)
{
	struct tab *t = (struct tab *) c;
	LRESULT current;
	struct tabPage *curpage;
	intmax_t curwid, curht;
	RECT r;

	r.left = 0;
	r.top = 0;
	r.right = 0;
	r.bottom = 0;
	if (t->pages->len != 0) {
		current = SendMessageW(t->hwnd, TCM_GETCURSEL, 0, 0);
		if (current != (LRESULT) (-1)) {
			curpage = ptrArrayIndex(t->pages, struct tabPage *, current);
			uiControlPreferredSize(curpage->control, d, &curwid, &curht);
			r.right = curwid;
			r.bottom = curht;
			// TODO add margins
		}
	}
	// otherwise just use the rect [0 0 0 0]
	// the following will take the tabs themselves into account
	SendMessageW(t->hwnd, TCM_ADJUSTRECT, (WPARAM) TRUE, (LPARAM) (&r));
	*width = r.right - r.left;
	*height = r.bottom - r.top;
}