/* 
 * tkMacOSXMenus.c --
 *
 *        These calls set up and manage the menubar for the
 *        Macintosh version of Tk.
 *
 * Copyright (c) 1995-1996 Sun Microsystems, Inc.
 * Copyright 2001, Apple Computer, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tkMacOSXMenus.c,v 1.3 2003/01/21 20:24:49 hunt Exp $
 */

#include "tk.h"
#include "tkInt.h"
#include "tkMacOSXInt.h"

/*
 * The define Status defined by Xlib.h conflicts with the function Status
 * defined by Devices.h.  We undefine it here to compile.
 */
#undef Status
#include <Carbon/Carbon.h>

#define kAppleMenu              256
#define kAppleAboutItem         1
#define kFileMenu               2
#define kEditMenu               3

#define kSourceItem             1
#define kCloseItem              2
#define kQuitItem               4

#define EDIT_CUT                1
#define EDIT_COPY               2
#define EDIT_PASTE              3
#define EDIT_CLEAR              4

MenuRef tkAppleMenu;
MenuRef tkFileMenu;
MenuRef tkEditMenu;

static Tcl_Interp * gInterp;        /* Interpreter for this application. */

static void GenerateEditEvent _ANSI_ARGS_((int flag));
static void SourceDialog _ANSI_ARGS_((void));

/*
 *----------------------------------------------------------------------
 *
 * TkMacOSXHandleMenuSelect --
 *
 *        Handles events that occur in the Menu bar.
 *
 * Results:
 *        None.
 *
 * Side effects:
 *        None.
 *
 *----------------------------------------------------------------------
 */

void 
TkMacOSXHandleMenuSelect(
    long mResult,
    int optionKeyPressed)
{
    short theItem = LoWord(mResult);
    short theMenu = HiWord(mResult);
    Tk_Window tkwin;
    Window window;
    TkDisplay *dispPtr;

    if (mResult == 0) {
        TkMacOSXHandleTearoffMenu();
        TkMacOSXClearMenubarActive();
        return;
    }

    switch (theMenu) {
        case kAppleMenu:
            switch (theItem) {
                case kAppleAboutItem:
                    {
                        Tcl_CmdInfo dummy;
                        if (optionKeyPressed || gInterp == NULL ||
                            Tcl_GetCommandInfo(gInterp,
                                "tkAboutDialog", &dummy) == 0) {
                            TkAboutDlg();
                        } else {
                            Tcl_Eval(gInterp, "tkAboutDialog");
                        }
                        break;
                    }
            }
            break;
        case kFileMenu:
            switch (theItem) {
                case kSourceItem:
                    /* TODO: source script */
                    SourceDialog();
                    break;
                case kCloseItem:
                    /* Send close event */
                    window = TkMacOSXGetXWindow(FrontNonFloatingWindow());
                    dispPtr = TkGetDisplayList();
                    tkwin = Tk_IdToWindow(dispPtr->display, window);
                    TkGenWMDestroyEvent(tkwin);
                    break;
                case kQuitItem:
                    /* Exit */
                    if (optionKeyPressed || gInterp == NULL) {
                        Tcl_Exit(0);
                    } else {
                        Tcl_Eval(gInterp, "exit");
                    }
                    break;
            }
            break;
        case kEditMenu:
            /*
             * This implementation just send keysyms
             * the Tk thinks are associated with function keys that
             * do Cut, Copy & Paste on a Sun keyboard.
             */
            GenerateEditEvent(theItem);
            break;
        default:
            TkMacOSXDispatchMenuEvent(theMenu, theItem);
            TkMacOSXClearMenubarActive();
            break;
    }
    /*
     * Finally we unhighlight the menu.
     */
    HiliteMenu(0);
}

/*
 *----------------------------------------------------------------------
 *
 * TkMacOSXInitMenus --
 *
 *        This procedure initializes the Macintosh menu bar.
 *
 * Results:
 *        None.
 *
 * Side effects:
 *        None.
 *
 *----------------------------------------------------------------------
 */

void 
TkMacOSXInitMenus(
    Tcl_Interp *interp)
{
    gInterp = interp;

    /* 
     * At this point, InitMenus() should have already been called. 
     */

    if (TkMacOSXUseMenuID(256) != TCL_OK) {
            panic("Menu ID 256 is already in use!");
    }
    tkAppleMenu = NewMenu(256, "\p\024");
    if (tkAppleMenu == NULL) {
        panic("memory - menus");
    }
    InsertMenu(tkAppleMenu, 0);
    AppendMenu(tkAppleMenu, "\pAbout Tcl & TkÉ");
    AppendMenu(tkAppleMenu, "\p(-");
    /* Not necessary in Carbon:
    AppendResMenu(tkAppleMenu, 'DRVR');
    */

    if (TkMacOSXUseMenuID(kFileMenu) != TCL_OK) {
            panic("Menu ID %d is already in use!", kFileMenu);
    }
    tkFileMenu = NewMenu(kFileMenu, "\pFile");
    if (tkFileMenu == NULL) {
        panic("memory - menus");
    }
    InsertMenu(tkFileMenu, 0);
    AppendMenu(tkFileMenu, "\pSourceÉ");
    AppendMenu(tkFileMenu, "\pClose/W");
    AppendMenu(tkFileMenu, "\p(-");
    AppendMenu(tkFileMenu, "\pQuit/Q");

    if (TkMacOSXUseMenuID(kEditMenu) != TCL_OK) {
            panic("Menu ID %d is already in use!", kEditMenu);
    }
    tkEditMenu = NewMenu(kEditMenu, "\pEdit");
    if (tkEditMenu == NULL) {
        panic("memory - menus");
    }
    InsertMenu(tkEditMenu, 0);
    AppendMenu(tkEditMenu, "\pCut/X");
    AppendMenu(tkEditMenu, "\pCopy/C");
    AppendMenu(tkEditMenu, "\pPaste/V");
    AppendMenu(tkEditMenu, "\pClear");
    if (TkMacOSXUseMenuID(kHMHelpMenuID) != TCL_OK) {
            panic("Help menu ID %s is already in use!", kHMHelpMenuID);
    }
    
    DrawMenuBar();
    TkMacOSXSetHelpMenuItemCount();
    return;
}

/*
 *----------------------------------------------------------------------
 *
 * GenerateEditEvent --
 *
 *        Takes an edit menu item and posts the corasponding a virtual 
 *        event to Tk's event queue.
 *
 * Results:
 *        None.
 *
 * Side effects:
 *        May place events of queue.
 *
 *----------------------------------------------------------------------
 */

static void 
GenerateEditEvent(
    int flag)
{
    XVirtualEvent event;
    Point where;
    Tk_Window tkwin;
    Window window;
    TkDisplay *dispPtr;

    window = TkMacOSXGetXWindow(FrontNonFloatingWindow());
    dispPtr = TkGetDisplayList();
    tkwin = Tk_IdToWindow(dispPtr->display, window);
    tkwin = (Tk_Window) ((TkWindow *) tkwin)->dispPtr->focusPtr;
    if (tkwin == NULL) {
        return;
    }

    event.type = VirtualEvent;
    event.serial = Tk_Display(tkwin)->request;
    event.send_event = false;
    event.display = Tk_Display(tkwin);
    event.event = Tk_WindowId(tkwin);
    event.root = XRootWindow(Tk_Display(tkwin), 0);
    event.subwindow = None;
    event.time = TkpGetMS();
    
    GetMouse(&where);
    tkwin = Tk_TopCoordsToWindow(tkwin, where.h, where.v, 
            &event.x, &event.y);
    LocalToGlobal(&where);
    event.x_root = where.h;
    event.y_root = where.v;
    event.state = TkMacOSXButtonKeyState();
    event.same_screen = true;
    
    switch (flag) {
        case EDIT_CUT:
            event.name = Tk_GetUid("Cut");
            break;
        case EDIT_COPY:
            event.name = Tk_GetUid("Copy");
            break;
        case EDIT_PASTE:
            event.name = Tk_GetUid("Paste");
            break;
        case EDIT_CLEAR:
            event.name = Tk_GetUid("Clear");
            break;
    }
    Tk_QueueWindowEvent((XEvent *) &event, TCL_QUEUE_TAIL);
}

/*
 *----------------------------------------------------------------------
 *
 * SourceDialog --
 *
 *        Presents a dialog to the user for selecting a Tcl file.  The
 *        selected file will be sourced into the main interpreter.
 *
 * Results:
 *        None.
 *
 * Side effects:
 *        None.
 *
 *----------------------------------------------------------------------
 */

static void 
SourceDialog()
{
    int result;
    CONST char *path;
    CONST char *openCmd = "tk_getOpenFile -filetypes {\
            {{TCL Scripts} {.tcl} TEXT} {{Text Files} {} TEXT}}";
    
    if (gInterp == NULL) {
        return;
    }
    if (Tcl_Eval(gInterp, openCmd) != TCL_OK) {
        return;
    }
    path = Tcl_GetStringResult(gInterp);
    if (strlen(path) == 0) {
        return;
    }
    result = Tcl_EvalFile(gInterp, path);
    if (result == TCL_ERROR) {
        Tcl_BackgroundError(gInterp);
    }           
}
