#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;

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

        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 + 2*ALF_Compat_GetSystemMetricsForDpi(
                        SM_CYEDGE, (UINT)ALF_CentipointsToPixels(GetParent(hwnd), 7200))
                    + 4 /* padding internal to the edit control */;
            }
        }

        SelectFont(hDc, oldfont);

        ReleaseDC(hwnd, hDc);
        return 0;
    } else if (uMsg == ALF_WM_APPLYSIZE) {
        RECT *p = (RECT *)lParam;

        // SWP_NOCOPYBITS as a bandaid since NT 3.51 doesn't invalidate properly
        return (LRESULT)DeferWindowPos((HDWP)wParam,
                                       hwnd, NULL,
                                       p->left, p->top,
                                       p->right - p->left, p->bottom - p->top,
                                       SWP_NOZORDER|SWP_NOACTIVATE|SWP_NOCOPYBITS);
    } else if (uMsg == WM_DESTROY) {
        ALF_Compat_RemoveWindowSubclass(hwnd, ALF__EditSubclassProc, 0);
    } else if (uMsg == WM_SETFONT) {
        ALF_InvalidateLayout(GetParent(hwnd));
    }

    return ALF_Compat_DefSubclassProc(hwnd, uMsg, wParam, lParam);
}

HWND
ALF_AddEdit(HWND win, WORD id, int x, int y, const TCHAR *text)
{
    DWORD exstyle;
    DWORD style;

    if (ALF_Compat_IsMinWindowsVersion(4, 0)) {
        exstyle = WS_EX_CLIENTEDGE;
        style = 0;
    } else {
        exstyle = 0;
        style = WS_BORDER;
    }

    HWND hwndEdit  = CreateWindowEx(exstyle,
                                    TEXT("EDIT"),
                                    text,
                                    WS_CHILD | WS_VISIBLE | WS_TABSTOP | style,
                                    0, 0, 100, 100,
                                    win,
                                    (HMENU)(int)id,
                                    (HINSTANCE)GetWindowLongPtr(win, GWLP_HINSTANCE),
                                    NULL);

    ALF_Compat_SetWindowSubclass(hwndEdit, ALF__EditSubclassProc, 0, 0);
    SetWindowPos(hwndEdit, NULL, 0, 0, 0, 0, SWP_NOZORDER | SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE | SWP_FRAMECHANGED);

    ALF_AddWidget(win, x, y, hwndEdit, 0, 0, ALF_LAYOUT_SIZE_QUERY | ALF_LAYOUT_CUSTOMPOS | ALF_LAYOUT_INHERITFONT);

    return hwndEdit;
}