#include "alfpriv.h"

/* EDIT */
static LRESULT CALLBACK
ALF__EditSubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
{
    (void)uIdSubclass;
    (void)dwRefData;

    ALFAPP app = (ALFAPP)dwRefData;

    if (uMsg == ALF_WM_QUERYSIZE) {
        HDC hDc = GetDC(hwnd);
        HFONT font = (HFONT)SendMessage(hwnd, WM_GETFONT, 0, 0);

        if (font) {
            HFONT oldfont = SelectFont(hDc, font);

            TEXTMETRIC tm;
            ZeroMemory(&tm, sizeof(tm));

            if (GetTextMetrics(hDc, &tm)) {
                SIZE *ps = (SIZE*)lParam;
                if (!ps->cx) {
                    ps->cx = ALF_CentipointsToPixels(GetParent(hwnd), 12000);
                }

                if (!ps->cy) {
                    ps->cy = tm.tmHeight + 6; // FIXME! use system metrics
                }
            }

            SelectFont(hDc, oldfont);
        }

        ReleaseDC(hwnd, hDc);
        return 0;
    }

    return app->compatFn->DefSubclassProc(hwnd, uMsg, wParam, lParam);
}

HWND
ALF_AddEdit(HWND win, WORD id, UINT x, UINT y, const WCHAR *text)
{
    HWND hwndEdit  = CreateWindowEx(WS_EX_CLIENTEDGE,
                                    L"EDIT",
                                    text,
                                    WS_CHILD | WS_VISIBLE | WS_TABSTOP,
                                    0, 0, 100, 100,
                                    win,
                                    (HMENU)(int)id,
                                    (HINSTANCE)GetWindowLongPtr(win, GWLP_HINSTANCE),
                                    NULL);

    ALFAPP app = ALF_ApplicationFromWindow(win);

    app->compatFn->SetWindowSubclass(hwndEdit, ALF__EditSubclassProc, 0, (DWORD_PTR)app);
    SetWindowPos(hwndEdit, NULL, 0, 0, 0, 0, SWP_NOZORDER | SWP_NOSIZE | SWP_NOMOVE | SWP_FRAMECHANGED);

    ALFAddWidgetParams p;
    ZeroMemory(&p, sizeof(p));
    p.hwnd = hwndEdit;
    p.x = x;
    p.y = y;
    p.width = 0;
    p.height = 0;
    p.flags = ALF_QUERYSIZE | ALF_MESSAGEFONT;
    p.margins[0] = 75; // TODO: pixel-perfect margin from system metrics
    p.margins[2] = 75;

    ALF_AddWidgetEx(win, &p);

    return hwndEdit;
}