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/* 
 * tkWinWindow.c --
 *
 *	Xlib emulation routines for Windows related to creating,
 *	displaying and destroying windows.
 *
 * Copyright (c) 1995-1997 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tkWinWindow.c,v 1.8 2001/09/25 16:25:20 dgp Exp $
 */

#include "tkWinInt.h"

typedef struct ThreadSpecificData {
    int initialized;            /* 0 means table below needs initializing. */
    Tcl_HashTable windowTable;  /* The windowTable maps from HWND to 
				 * Tk_Window handles. */
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;

/*
 * Forward declarations for procedures defined in this file:
 */

static void		NotifyVisibility _ANSI_ARGS_((XEvent *eventPtr,
			    TkWindow *winPtr));

/*
 *----------------------------------------------------------------------
 *
 * Tk_AttachHWND --
 *
 *	This function binds an HWND and a reflection procedure to
 *	the specified Tk_Window. 
 *
 * Results:
 *	Returns an X Window that encapsulates the HWND.
 *
 * Side effects:
 *	May allocate a new X Window.  Also enters the HWND into the
 *	global window table.
 *
 *----------------------------------------------------------------------
 */

Window
Tk_AttachHWND(tkwin, hwnd)
    Tk_Window tkwin;
    HWND hwnd;
{
    int new;
    Tcl_HashEntry *entryPtr;
    TkWinDrawable *twdPtr = (TkWinDrawable *) Tk_WindowId(tkwin);
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *) 
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if (!tsdPtr->initialized) {
	Tcl_InitHashTable(&tsdPtr->windowTable, TCL_ONE_WORD_KEYS);
	tsdPtr->initialized = 1;
    }

    /*
     * Allocate a new drawable if necessary.  Otherwise, remove the
     * previous HWND from from the window table.
     */

    if (twdPtr == NULL) {
	twdPtr = (TkWinDrawable*) ckalloc(sizeof(TkWinDrawable));
	twdPtr->type = TWD_WINDOW;
	twdPtr->window.winPtr = (TkWindow *) tkwin;
    } else if (twdPtr->window.handle != NULL) {
	entryPtr = Tcl_FindHashEntry(&tsdPtr->windowTable,
		(char *)twdPtr->window.handle);
	Tcl_DeleteHashEntry(entryPtr);
    }

    /*
     * Insert the new HWND into the window table.
     */

    twdPtr->window.handle = hwnd;
    entryPtr = Tcl_CreateHashEntry(&tsdPtr->windowTable, (char *)hwnd, &new);
    Tcl_SetHashValue(entryPtr, (ClientData)tkwin);

    return (Window)twdPtr;
}

/*
 *----------------------------------------------------------------------
 *
 * Tk_HWNDToWindow --
 *
 *	This function retrieves a Tk_Window from the window table
 *	given an HWND.
 *
 * Results:
 *	Returns the matching Tk_Window.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

Tk_Window
Tk_HWNDToWindow(hwnd)
    HWND hwnd;
{
    Tcl_HashEntry *entryPtr;
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *) 
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if (!tsdPtr->initialized) {
	Tcl_InitHashTable(&tsdPtr->windowTable, TCL_ONE_WORD_KEYS);
	tsdPtr->initialized = 1;
    }
    entryPtr = Tcl_FindHashEntry(&tsdPtr->windowTable, (char*)hwnd);
    if (entryPtr != NULL) {
	return (Tk_Window) Tcl_GetHashValue(entryPtr);
    }
    return NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * Tk_GetHWND --
 *
 *	This function extracts the HWND from an X Window.
 *
 * Results:
 *	Returns the HWND associated with the Window.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

HWND
Tk_GetHWND(window)
    Window window;
{
    TkWinDrawable *twdPtr = (TkWinDrawable *) window;
    return twdPtr->window.handle;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpPrintWindowId --
 *
 *	This routine stores the string representation of the
 *	platform dependent window handle for an X Window in the
 *	given buffer.
 *
 * Results:
 *	Returns the result in the specified buffer.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

void
TkpPrintWindowId(buf, window)
    char *buf;			/* Pointer to string large enough to hold
				 * the hex representation of a pointer. */
    Window window;		/* Window to be printed into buffer. */
{
    HWND hwnd = (window) ? Tk_GetHWND(window) : 0;
    /*
     * Use pointer representation, because Win64 is P64 (*not* LP64).
     * Windows doesn't print the 0x for %p, so we do it.
     */
    sprintf(buf, "0x%p", hwnd);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpScanWindowId --
 *
 *	Given a string which represents the platform dependent window
 *	handle, produce the X Window id for the window.
 *
 * Results:
 *	The return value is normally TCL_OK;  in this case *idPtr
 *	will be set to the X Window id equivalent to string.  If
 *	string is improperly formed then TCL_ERROR is returned and
 *	an error message will be left in the interp's result.  If the
 *	number does not correspond to a Tk Window, then *idPtr will
 *	be set to None.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TkpScanWindowId(interp, string, idPtr)
    Tcl_Interp *interp;		/* Interpreter to use for error reporting. */
    CONST char *string;		/* String containing a (possibly signed)
				 * integer in a form acceptable to strtol. */
    Window *idPtr;		/* Place to store converted result. */
{
    Tk_Window tkwin;
    Window number;

    /*
     * We want sscanf for the 64-bit check, but if that doesn't work,
     * then Tcl_GetInt manages the error correctly.
     */
    if (
#ifdef _WIN64
	(sscanf(string, "0x%p", &number) != 1) &&
#endif
	Tcl_GetInt(interp, string, (int *)&number) != TCL_OK) {
	return TCL_ERROR;
    }

    tkwin = Tk_HWNDToWindow((HWND)number);
    if (tkwin) {
	*idPtr = Tk_WindowId(tkwin);
    } else {
	*idPtr = None;
    }
    return TCL_OK;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpMakeWindow --
 *
 *	Creates a Windows window object based on the current attributes
 *	of the specified TkWindow.
 *
 * Results:
 *	Returns a pointer to a new TkWinDrawable cast to a Window.
 *
 * Side effects:
 *	Creates a new window.
 *
 *----------------------------------------------------------------------
 */

Window
TkpMakeWindow(winPtr, parent)
    TkWindow *winPtr;
    Window parent;
{
    HWND parentWin;
    int style;
    HWND hwnd;
    
    if (parent != None) {
	parentWin = Tk_GetHWND(parent);
	style = WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
    } else {
	parentWin = NULL;
	style = WS_POPUP | WS_CLIPCHILDREN;
    }

    /*
     * Create the window, then ensure that it is at the top of the
     * stacking order.
     */

    hwnd = CreateWindowEx(WS_EX_NOPARENTNOTIFY, TK_WIN_CHILD_CLASS_NAME, NULL,
	    style, Tk_X(winPtr), Tk_Y(winPtr), Tk_Width(winPtr),
	    Tk_Height(winPtr), parentWin, NULL, Tk_GetHINSTANCE(), NULL);
    SetWindowPos(hwnd, HWND_TOP, 0, 0, 0, 0,
		    SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
    return Tk_AttachHWND((Tk_Window)winPtr, hwnd);
}

/*
 *----------------------------------------------------------------------
 *
 * XDestroyWindow --
 *
 *	Destroys the given window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Sends the WM_DESTROY message to the window and then destroys
 *	it the Win32 resources associated with the window.
 *
 *----------------------------------------------------------------------
 */

void
XDestroyWindow(display, w)
    Display* display;
    Window w;
{
    Tcl_HashEntry *entryPtr;
    TkWinDrawable *twdPtr = (TkWinDrawable *)w;
    TkWindow *winPtr = TkWinGetWinPtr(w);
    HWND hwnd = Tk_GetHWND(w);
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *) 
            Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    display->request++;

    /*
     * Remove references to the window in the pointer module then
     * release the drawable.
     */

    TkPointerDeadWindow(winPtr);

    entryPtr = Tcl_FindHashEntry(&tsdPtr->windowTable, (char*)hwnd);
    if (entryPtr != NULL) {
	Tcl_DeleteHashEntry(entryPtr);
    }

    ckfree((char *)twdPtr);

    /*
     * Don't bother destroying the window if we are going to destroy
     * the parent later.
     */

    if (hwnd != NULL && !(winPtr->flags & TK_DONT_DESTROY_WINDOW)) {
	DestroyWindow(hwnd);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * XMapWindow --
 *
 *	Cause the given window to become visible.
 *
 * Results:
 *	None
 *
 * Side effects:
 *	Causes the window state to change, and generates a MapNotify
 *	event.
 *
 *----------------------------------------------------------------------
 */

void
XMapWindow(display, w)
    Display* display;
    Window w;
{
    XEvent event;
    TkWindow *parentPtr;
    TkWindow *winPtr = TkWinGetWinPtr(w);

    display->request++;

    ShowWindow(TkWinGetHWND(w), SW_SHOWNORMAL);
    winPtr->flags |= TK_MAPPED;

    /*
     * Check to see if this window is visible now.  If all of the parent
     * windows up to the first toplevel are mapped, then this window and
     * its mapped children have just become visible.
     */

    if (!(winPtr->flags & TK_TOP_LEVEL)) {
	for (parentPtr = winPtr->parentPtr; ;
	        parentPtr = parentPtr->parentPtr) {
	    if ((parentPtr == NULL) || !(parentPtr->flags & TK_MAPPED)) {
		return;
	    }
	    if (parentPtr->flags & TK_TOP_LEVEL) {
		break;
	    }
	}
    } else {
	event.type = MapNotify;
	event.xmap.serial = display->request;
	event.xmap.send_event = False;
	event.xmap.display = display;
	event.xmap.event = winPtr->window;
	event.xmap.window = winPtr->window;
	event.xmap.override_redirect = winPtr->atts.override_redirect;
	Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
    }
    
    /*
     * Generate VisibilityNotify events for this window and its mapped
     * children.
     */

    event.type = VisibilityNotify;
    event.xvisibility.serial = display->request;
    event.xvisibility.send_event = False;
    event.xvisibility.display = display;
    event.xvisibility.window = winPtr->window;
    event.xvisibility.state = VisibilityUnobscured;
    NotifyVisibility(&event, winPtr);
}

/*
 *----------------------------------------------------------------------
 *
 * NotifyVisibility --
 *
 *	This function recursively notifies the mapped children of the
 *	specified window of a change in visibility.  Note that we don't
 *	properly report the visibility state, since Windows does not
 *	provide that info.  The eventPtr argument must point to an event
 *	that has been completely initialized except for the window slot.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Generates lots of events.
 *
 *----------------------------------------------------------------------
 */

static void
NotifyVisibility(eventPtr, winPtr)
    XEvent *eventPtr;		/* Initialized VisibilityNotify event. */
    TkWindow *winPtr;		/* Window to notify. */
{
    if (winPtr->atts.event_mask & VisibilityChangeMask) {
	eventPtr->xvisibility.window = winPtr->window;
	Tk_QueueWindowEvent(eventPtr, TCL_QUEUE_TAIL);
    }
    for (winPtr = winPtr->childList; winPtr != NULL; 
	    winPtr = winPtr->nextPtr) {
	if (winPtr->flags & TK_MAPPED) {
	    NotifyVisibility(eventPtr, winPtr);
	}
    }
}

/*
 *----------------------------------------------------------------------
 *
 * XUnmapWindow --
 *
 *	Cause the given window to become invisible.
 *
 * Results:
 *	None
 *
 * Side effects:
 *	Causes the window state to change, and generates an UnmapNotify
 *	event.
 *
 *----------------------------------------------------------------------
 */

void
XUnmapWindow(display, w)
    Display* display;
    Window w;
{
    XEvent event;
    TkWindow *winPtr = TkWinGetWinPtr(w);

    display->request++;

    /*
     * Bug fix: Don't short circuit this routine based on TK_MAPPED because
     * it will be cleared before XUnmapWindow is called.
     */

    ShowWindow(TkWinGetHWND(w), SW_HIDE);
    winPtr->flags &= ~TK_MAPPED;

    if (winPtr->flags & TK_TOP_LEVEL) {
	event.type = UnmapNotify;
	event.xunmap.serial = display->request;
	event.xunmap.send_event = False;
	event.xunmap.display = display;
	event.xunmap.event = winPtr->window;
	event.xunmap.window = winPtr->window;
	event.xunmap.from_configure = False;
	Tk_HandleEvent(&event);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * XMoveResizeWindow --
 *
 *	Move and resize a window relative to its parent.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Repositions and resizes the specified window.
 *
 *----------------------------------------------------------------------
 */

void
XMoveResizeWindow(display, w, x, y, width, height)
    Display* display;
    Window w;
    int x;			/* Position relative to parent. */
    int y;
    unsigned int width;
    unsigned int height;
{
    display->request++;
    MoveWindow(TkWinGetHWND(w), x, y, width, height, TRUE);
}

/*
 *----------------------------------------------------------------------
 *
 * XMoveWindow --
 *
 *	Move a window relative to its parent.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Repositions the specified window.
 *
 *----------------------------------------------------------------------
 */

void
XMoveWindow(display, w, x, y)
    Display* display;
    Window w;
    int x;
    int y;
{
    TkWindow *winPtr = TkWinGetWinPtr(w);

    display->request++;

    MoveWindow(TkWinGetHWND(w), x, y, winPtr->changes.width,
	    winPtr->changes.height, TRUE);
}

/*
 *----------------------------------------------------------------------
 *
 * XResizeWindow --
 *
 *	Resize a window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Resizes the specified window.
 *
 *----------------------------------------------------------------------
 */

void
XResizeWindow(display, w, width, height)
    Display* display;
    Window w;
    unsigned int width;
    unsigned int height;
{
    TkWindow *winPtr = TkWinGetWinPtr(w);

    display->request++;

    MoveWindow(TkWinGetHWND(w), winPtr->changes.x, winPtr->changes.y, width,
	    height, TRUE);
}

/*
 *----------------------------------------------------------------------
 *
 * XRaiseWindow --
 *
 *	Change the stacking order of a window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Changes the stacking order of the specified window.
 *
 *----------------------------------------------------------------------
 */

void
XRaiseWindow(display, w)
    Display* display;
    Window w;
{
    HWND window = TkWinGetHWND(w);

    display->request++;
    SetWindowPos(window, HWND_TOPMOST, 0, 0, 0, 0,
	    SWP_NOMOVE | SWP_NOSIZE);
}

/*
 *----------------------------------------------------------------------
 *
 * XConfigureWindow --
 *
 *	Change the size, position, stacking, or border of the specified
 *	window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Changes the attributes of the specified window.  Note that we
 *	ignore the passed in values and use the values stored in the
 *	TkWindow data structure.
 *
 *----------------------------------------------------------------------
 */

void
XConfigureWindow(display, w, value_mask, values)
    Display* display;
    Window w;
    unsigned int value_mask;
    XWindowChanges* values;
{
    TkWindow *winPtr = TkWinGetWinPtr(w);
    HWND hwnd = TkWinGetHWND(w);

    display->request++;

    /*
     * Change the shape and/or position of the window.
     */

    if (value_mask & (CWX|CWY|CWWidth|CWHeight)) {
	MoveWindow(hwnd, winPtr->changes.x, winPtr->changes.y,
		winPtr->changes.width, winPtr->changes.height, TRUE);
    }

    /*
     * Change the stacking order of the window.
     */

    if (value_mask & CWStackMode) {
	HWND sibling;
	if ((value_mask & CWSibling) && (values->sibling != None)) {
	    sibling = Tk_GetHWND(values->sibling);
	} else {
	    sibling = NULL;
	}
	TkWinSetWindowPos(hwnd, sibling, values->stack_mode);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * XClearWindow --
 *
 *	Clears the entire window to the current background color.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Erases the current contents of the window.
 *
 *----------------------------------------------------------------------
 */

void
XClearWindow(display, w)
    Display* display;
    Window w;
{
    RECT rc;
    HBRUSH brush;
    HPALETTE oldPalette, palette;
    TkWindow *winPtr;
    HWND hwnd = TkWinGetHWND(w);
    HDC dc = GetDC(hwnd);

    palette = TkWinGetPalette(display->screens[0].cmap);
    oldPalette = SelectPalette(dc, palette, FALSE);

    display->request++;

    winPtr = TkWinGetWinPtr(w);
    brush = CreateSolidBrush(winPtr->atts.background_pixel);
    GetWindowRect(hwnd, &rc);
    rc.right = rc.right - rc.left;
    rc.bottom = rc.bottom - rc.top;
    rc.left = rc.top = 0;
    FillRect(dc, &rc, brush);

    DeleteObject(brush);
    SelectPalette(dc, oldPalette, TRUE);
    ReleaseDC(hwnd, dc);
}

/*
 *----------------------------------------------------------------------
 *
 * XChangeWindowAttributes --
 *
 *	This function is called when the attributes on a window are
 *	updated.  Since Tk maintains all of the window state, the only
 *	relevant value is the cursor.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	May cause the mouse position to be updated.
 *
 *----------------------------------------------------------------------
 */

void
XChangeWindowAttributes(display, w, valueMask, attributes)
    Display* display;
    Window w;
    unsigned long valueMask;
    XSetWindowAttributes* attributes;
{
    if (valueMask & CWCursor) {
	XDefineCursor(display, w, attributes->cursor);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkWinSetWindowPos --
 *
 *	Adjust the stacking order of a window relative to a second
 *	window (or NULL).
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Moves the specified window in the stacking order.
 *
 *----------------------------------------------------------------------
 */

void
TkWinSetWindowPos(hwnd, siblingHwnd, pos)
    HWND hwnd;			/* Window to restack. */
    HWND siblingHwnd;		/* Sibling window. */
    int pos;			/* One of Above or Below. */
{
    HWND temp;

    /*
     * Since Windows does not support Above mode, we place the
     * specified window below the sibling and then swap them.
     */

    if (siblingHwnd) {
	if (pos == Above) {
	    SetWindowPos(hwnd, siblingHwnd, 0, 0, 0, 0,
		    SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
	    temp = hwnd;
	    hwnd = siblingHwnd;
	    siblingHwnd = temp;
	}
    } else {
	siblingHwnd = (pos == Above) ? HWND_TOP : HWND_BOTTOM;
    }

    SetWindowPos(hwnd, siblingHwnd, 0, 0, 0, 0,
	    SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpWindowWasRecentlyDeleted --
 *
 *	Determines whether we know if the window given as argument was
 *	recently deleted. Called by the generic code error handler to
 *	handle BadWindow events.
 *
 * Results:
 *	Always 0. We do not keep this information on Windows.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TkpWindowWasRecentlyDeleted(win, dispPtr)
    Window win;
    TkDisplay *dispPtr;
{
    return 0;
}