/* IBM_PROLOG_BEGIN_TAG                                                   */
/* This is an automatically generated prolog.                             */
/*                                                                        */
/* gos720 src/gos/2d/XTOP/programs/xclipboard/xclipboard.c 1.1            */
/*                                                                        */
/* Licensed Materials - Property of IBM                                   */
/*                                                                        */
/* COPYRIGHT International Business Machines Corp. 1996                   */
/* All Rights Reserved                                                    */
/*                                                                        */
/* US Government Users Restricted Rights - Use, duplication or            */
/* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.      */
/*                                                                        */
/* IBM_PROLOG_END_TAG                                                     */
/* SCCSID_BEGIN_TAG                                                    */
#ifndef lint
static char sccsid[] = "@(#)68  1.1  src/gos/2d/XTOP/programs/xclipboard/xclipboard.c, xsample, gos720 7/16/96 10:05:34";
#endif
/* SCCSID_END_TAG                                                      */
/*
 * $XConsortium: xclipboard.c /main/30 1996/02/02 14:26:44 kaleb $
 *
 * 
Copyright (c) 1989  X Consortium

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.
 * *
 * Author:  Ralph Swick, DEC/Project Athena
 * Updated for R4:  Chris D. Peterson,  MIT X Consortium.
 * Reauthored by: Keith Packard, MIT X Consortium.
 */

#include <stdio.h>
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Xatom.h>

#include <X11/Xmu/Atoms.h>
#include <X11/Xmu/StdSel.h>

#include <X11/Shell.h>
#include <X11/Xaw/Form.h>
#include <X11/Xaw/Label.h>
#include <X11/Xaw/Command.h>
#include <X11/Xaw/AsciiText.h>
#include <X11/Xaw/Dialog.h>
#include <X11/Xaw/Cardinals.h>
#include <X11/Xfuncs.h>

#ifdef XKB
#include <X11/extensions/XKBbells.h>
#endif

#define Command commandWidgetClass
#define Label	labelWidgetClass
#define Text    asciiTextWidgetClass

#define INFINITY 10000000	/* pretty big, huh? */

typedef struct _Clip {
    struct _Clip    *next, *prev;
    char	    *clip;
    char	    *filename;
    int		    avail;
} ClipRec, *ClipPtr;

extern char *malloc ();

static Atom wm_delete_window;
static Atom wm_protocols;

static long TextLength (w)
    Widget  w;
{
    return XawTextSourceScan (XawTextGetSource (w),
			      (XawTextPosition) 0,
 			      XawstAll, XawsdRight, 1, TRUE);
}

SaveClip (w, clip)
    Widget  w;
    ClipPtr clip;
{
    Arg	    args[1];
    char    *data;
    int	    len;
    Widget  source;

    source = XawTextGetSource (w);
    XtSetArg (args[0], XtNstring, &data);
    XtGetValues (source, args, 1);
    len = strlen (data);
    if (len >= clip->avail)
    {
	if (clip->clip)
	    free (clip->clip);
	clip->clip = malloc (len + 1);
	if (!clip->clip)
	    clip->avail = 0;
	else
	    clip->avail = len + 1;
    }
    if (clip->avail)
    {
	strcpy (clip->clip, data);
    }
}

RestoreClip (w, clip)
    Widget  w;
    ClipPtr clip;
{
    Arg	    args[1];
    Widget  source;

    source = XawTextGetSource (w);
    XtSetArg (args[0], XtNstring, clip->clip);
    XtSetValues (source, args, 1);
}

/*ARGSUSED*/
ClipPtr 
NewClip (w, old)
    Widget  w;
    ClipPtr old;
{
    ClipPtr newClip;

    newClip = (ClipPtr) malloc (sizeof (ClipRec));
    if (!newClip)
	return newClip;
    newClip->clip = 0;
    newClip->avail = 0;
    newClip->prev = old;
    newClip->next = NULL;
    newClip->filename = NULL;
    if (old)
    {
	newClip->next = old->next;
	old->next = newClip;
    }
    return newClip;
}

/*ARGSUSED*/
DeleteClip (w, clip)
    Widget  w;
    ClipPtr clip;
{
    if (clip->prev)
	clip->prev->next = clip->next;
    if (clip->next)
	clip->next->prev = clip->prev;
    if (clip->clip)
	free (clip->clip);
    free ((char *) clip);
}

static ClipPtr	currentClip;
static Widget	top;
static Widget	text, nextButton, prevButton, indexLabel;
static Widget	fileDialog, fileDialogShell;
static Widget	failDialog, failDialogShell;

static int
IndexCurrentClip ()
{
    int	i = 0;
    ClipPtr clip;

    for (clip = currentClip; clip; clip = clip->prev)
	i++;
    return i;
}

static void
set_button_state ()
{
    Boolean prevvalid, nextvalid;
    Arg arg;
    char labelString[10];

    prevvalid = currentClip->prev != NULL;
    nextvalid = currentClip->next != NULL;
    XtSetArg (arg, XtNsensitive, prevvalid);
    XtSetValues (prevButton, &arg, ONE);
    XtSetArg (arg, XtNsensitive, nextvalid);
    XtSetValues (nextButton, &arg, ONE);
    sprintf (labelString, "%d", IndexCurrentClip ());
    XtSetArg (arg, XtNlabel, labelString);
    XtSetValues (indexLabel, &arg, ONE);
}

/* ARGSUSED */
static void
NextCurrentClip (w, ev, parms, np)
    Widget	w;
    XEvent	*ev;
    String	*parms;
    Cardinal	*np;
{
    if (currentClip->next)
    {
	SaveClip (text, currentClip);
	currentClip = currentClip->next;
	RestoreClip (text, currentClip);
	set_button_state ();
    }
}

/* ARGSUSED */
static void
PrevCurrentClip (w, ev, parms, np)
    Widget	w;
    XEvent	*ev;
    String	*parms;
    Cardinal	*np;
{
    if (currentClip->prev)
    {
	SaveClip (text, currentClip);
	currentClip = currentClip->prev;
	RestoreClip (text, currentClip);
	set_button_state ();
    }
}

/* ARGSUSED */
static void
DeleteCurrentClip (w, ev, parms, np)
    Widget	w;
    XEvent	*ev;
    String	*parms;
    Cardinal	*np;
{
    ClipPtr newCurrent;

    if (currentClip->prev)
	newCurrent = currentClip->prev;
    else
	newCurrent = currentClip->next;
    if (newCurrent)
    {
	DeleteClip (text, currentClip);
	currentClip = newCurrent;
	RestoreClip (text, currentClip);
    }
    else
	EraseTextWidget ();
    set_button_state ();
}

/* ARGSUSED */
static void
Quit (w, ev, parms, np)
    Widget	w;
    XEvent	*ev;
    String	*parms;
    Cardinal	*np;
{
    XtCloseDisplay  (XtDisplay (text));
    exit (0);
}

static void
CenterWidgetAtPoint (w, x, y)
    Widget  w;
    int	    x, y;
{
    Arg	args[2];
    Dimension	width, height;

    XtSetArg(args[0], XtNwidth, &width);
    XtSetArg(args[1], XtNheight, &height);
    XtGetValues (w, args, 2);
    x = x - (int) width / 2;
    y = y - (int) height / 2;
    if (x < 0)
	x = 0;
    else {
	int scr_width = WidthOfScreen (XtScreen(w));
	if (x + (int)width > scr_width)
	    x = scr_width - width;
    }
    if (y < 0)
	y = 0;
    else {
	int scr_height = HeightOfScreen (XtScreen(w));
	if (y + (int)height > scr_height)
	    y = scr_height - height;
    }
    XtSetArg(args[0], XtNx, x);
    XtSetArg(args[1], XtNy, y);
    XtSetValues (w, args, 2);
}

static void
CenterWidgetOnEvent (w, e)
    Widget  w;
    XEvent  *e;
{
    CenterWidgetAtPoint (w, e->xbutton.x_root, e->xbutton.y_root);
}

static void
CenterWidgetOnWidget (w, wT)
    Widget  w, wT;
{
    Position	rootX, rootY;
    Dimension	width, height;
    Arg		args[2];

    XtSetArg (args[0], XtNwidth, &width);
    XtSetArg (args[1], XtNheight, &height);
    XtGetValues (wT, args, 2);
    XtTranslateCoords (wT, (Position) width/2, (Position) height/2, &rootX, &rootY);
    CenterWidgetAtPoint (w, (int) rootX, (int) rootY);
}

/*ARGSUSED*/
static void
SaveToFile (w, e, argv, argc)
    Widget  w;
    XEvent  *e;
    String  *argv;
    Cardinal	    *argc;
{
    Arg	    args[1];
    char    *filename;

    filename = "clipboard";
    if (currentClip->filename)
	filename = currentClip->filename;
    XtSetArg(args[0], XtNvalue, filename);
    XtSetValues (fileDialog, args, 1);
    CenterWidgetOnEvent (fileDialogShell, e);
    XtPopup (fileDialogShell, XtGrabNone);
}

/*ARGSUSED*/
static void
AcceptSaveFile (w, e, argv, argc)
    Widget  w;
    XEvent  *e;
    String  *argv;
    Cardinal	*argc;
{
    char    *filename;
    Boolean success;
    Arg	    args[1];

    filename = XawDialogGetValueString (fileDialog);
    success = XawAsciiSaveAsFile (XawTextGetSource (text), filename);
    XtPopdown (fileDialogShell);
    if (!success)
    {
	char	failMessage[1024];

	sprintf (failMessage, "Can't open file \"%s\"", filename);
	XtSetArg (args[0], XtNlabel, failMessage);
	XtSetValues (failDialog, args, 1);
	CenterWidgetOnEvent (failDialogShell, e);
	XtPopup (failDialogShell, XtGrabNone);
    }
    else
    {
	if (currentClip->filename)
	    free (currentClip->filename);
	currentClip->filename = malloc (strlen (filename) + 1);
	if (currentClip->filename)
	    strcpy (currentClip->filename, filename);
    }
}

/* ARGSUSED */
static void
CancelSaveFile (w, ev, parms, np)
    Widget	w;
    XEvent	*ev;
    String	*parms;
    Cardinal	*np;
{
    XtPopdown (fileDialogShell);
}

/* ARGSUSED */
static void
FailContinue (w, ev, parms, np)
    Widget	w;
    XEvent	*ev;
    String	*parms;
    Cardinal	*np;
{
    XtPopdown (failDialogShell);
}

/*ARGSUSED*/
static void WMProtocols(w, ev, params, n)
    Widget	w;
    XEvent	*ev;
    String	*params;
    Cardinal	*n;
{
    if (ev->type == ClientMessage &&
	ev->xclient.message_type == wm_protocols &&
	ev->xclient.data.l[0] == wm_delete_window) {
	while (w && !XtIsShell(w))
	    w = XtParent(w);
	if (w == top)
	    Quit(w, ev, params, n);
	else if (w == fileDialogShell)
	    CancelSaveFile(w, ev, params, n);
	else if (w == failDialogShell)
	    FailContinue(w, ev, params, n);
    }
}

/* ARGUSED */
static void
NewCurrentClip (w, ev, parms, np)
    Widget	w;
    XEvent	*ev;
    String	*parms;
    Cardinal	*np;
{
    NewCurrentClipContents ("", 0);
}

NewCurrentClipContents (data, len)
    char    *data;
    int	    len;
{
    XawTextBlock textBlock;

    SaveClip (text, currentClip);

    /* append new clips at the end */
    while (currentClip && currentClip->next)
	currentClip = currentClip->next;
    /* any trailing clips with no text get overwritten */
    if (strlen (currentClip->clip) != 0)
	currentClip = NewClip (text, currentClip);
    
    textBlock.ptr = data;
    textBlock.firstPos = 0;
    textBlock.length = len;
    textBlock.format = FMT8BIT;
    if (XawTextReplace(text, 0, TextLength (text), &textBlock)) {
#ifdef XKB
	XkbStdBell(XtDisplay(text), XtWindow(text), 0, XkbBI_Info);
#else
	XBell( XtDisplay(text), 0);
#endif
    }
    set_button_state ();
}

EraseTextWidget ()
{
    XawTextBlock block;

    block.ptr = "";
    block.length = 0;
    block.firstPos = 0;
    block.format = FMT8BIT;

    XawTextReplace(text, 0, INFINITY, &block);
    /* If this fails, too bad. */
}


XtActionsRec xclipboard_actions[] = {
    "NewClip", NewCurrentClip,
    "NextClip",	NextCurrentClip,
    "PrevClip", PrevCurrentClip,
    "DeleteClip", DeleteCurrentClip,
    "Save", SaveToFile,
    "AcceptSave", AcceptSaveFile,
    "CancelSave", CancelSaveFile,
    "FailContinue", FailContinue,
    "Quit", Quit,
    "WMProtocols", WMProtocols
};

static XrmOptionDescRec table[] = {
    {"-w",	    "wrap",		XrmoptionNoArg,  "on"},
/*    {"-nw",	    "wrap",		XrmoptionNoArg,  "False"} */
};

static void	LoseSelection ();
static void	InsertClipboard ();
static Boolean	ConvertSelection();
static Atom	ManagerAtom, ClipboardAtom;

/*ARGSUSED*/
static void 
InsertClipboard(w, client_data, selection, type, value, length, format)
Widget w;
XtPointer client_data;
Atom *selection, *type;
XtPointer value;
unsigned long *length;
int *format;
{
    if (*type != XT_CONVERT_FAIL)
	NewCurrentClipContents ((char *) value, *length);
    else
    {
	Arg arg;
	XtSetArg (arg, XtNlabel, "CLIPBOARD selection conversion failed");
	XtSetValues (failDialog, &arg, 1);
	CenterWidgetOnWidget (failDialogShell, text);
	XtPopup (failDialogShell, XtGrabNone);
#ifdef XKB
	XkbStdBell( XtDisplay(w), XtWindow(w), 0, XkbBI_MinorError );
#else
	XBell( XtDisplay(w), 0 );
#endif
    }
    
    XtOwnSelection(top, ClipboardAtom, CurrentTime,
		   ConvertSelection, LoseSelection, NULL);
    XFree(value);
}

static Boolean ConvertSelection(w, selection, target,
				type, value, length, format)
    Widget w;
    Atom *selection, *target, *type;
    XtPointer *value;
    unsigned long *length;
    int *format;
{
    Display* d = XtDisplay(w);
    XSelectionRequestEvent* req =
	XtGetSelectionRequest(w, *selection, (XtRequestId)NULL);

    if (*target == XA_TARGETS(d)) {
	Atom* targetP;
	Atom* std_targets;
	unsigned long std_length;
	XmuConvertStandardSelection(w, req->time, selection, target, type,
				  (XPointer*)&std_targets, &std_length, format);
	*value = XtMalloc(sizeof(Atom)*(std_length + 5));
	targetP = *(Atom**)value;
	*targetP++ = XA_STRING;
	*targetP++ = XA_TEXT(d);
	*targetP++ = XA_LENGTH(d);
	*targetP++ = XA_LIST_LENGTH(d);
	*targetP++ = XA_CHARACTER_POSITION(d);
	*length = std_length + (targetP - (*(Atom **) value));
	memmove( (char*)targetP, (char*)std_targets, sizeof(Atom)*std_length);
	XtFree((char*)std_targets);
	*type = XA_ATOM;
	*format = 32;
	return True;
    }

    if (*target == XA_LIST_LENGTH(d) ||
	*target == XA_LENGTH(d))
    {
    	long * temp;
    	
    	temp = (long *) XtMalloc(sizeof(long));
    	if (*target == XA_LIST_LENGTH(d))
      	  *temp = 1L;
    	else			/* *target == XA_LENGTH(d) */
      	  *temp = (long) TextLength (text);
    	
    	*value = (XPointer) temp;
    	*type = XA_INTEGER;
    	*length = 1L;
    	*format = 32;
    	return True;
    }
    
    if (*target == XA_CHARACTER_POSITION(d))
    {
    	long * temp;
    	
    	temp = (long *) XtMalloc(2 * sizeof(long));
    	temp[0] = (long) 0;
    	temp[1] = TextLength (text);
    	*value = (XPointer) temp;
    	*type = XA_SPAN(d);
    	*length = 2L;
    	*format = 32;
    	return True;
    }
    
    if (*target == XA_STRING ||
      *target == XA_TEXT(d) ||
      *target == XA_COMPOUND_TEXT(d))
    {
	extern char *_XawTextGetSTRING();
    	if (*target == XA_COMPOUND_TEXT(d))
	    *type = *target;
    	else
	    *type = XA_STRING;
	*length = TextLength (text);
    	*value = _XawTextGetSTRING((TextWidget) text, 0, *length);
    	*format = 8;
    	return True;
    }
    
    if (XmuConvertStandardSelection(w, req->time, selection, target, type,
				    (XPointer *)value, length, format))
	return True;

    return False;
}

static void LoseSelection(w, selection)
    Widget w;
    Atom *selection;
{
    XtGetSelectionValue(w, *selection, XA_STRING, InsertClipboard,
			NULL, CurrentTime);
}

/*ARGSUSED*/
static Boolean RefuseSelection(w, selection, target,
			       type, value, length, format)
    Widget w;
    Atom *selection, *target, *type;
    XtPointer *value;
    unsigned long *length;
    int *format;
{
    return False;
}

/*ARGSUSED*/
static void LoseManager(w, selection)
    Widget w;
    Atom *selection;
{
    XtError("another clipboard has taken over control\n");
}

typedef struct {
  Boolean wrap;
} ResourceData, *ResourceDataPtr;

static ResourceData userOptions;

#define Offset(field) XtOffsetOf(ResourceData, field)

XtResource resources[] = {
  {"wrap", "Wrap", XtRBoolean, sizeof(Boolean),
     Offset(wrap), XtRImmediate, (XtPointer)False}
};

#undef Offset

void
main(argc, argv)
int argc;
char **argv;
{
    Arg args[4];
    Cardinal n;
    XtAppContext xtcontext;
    Widget parent, quit, delete, new, save;

    XtSetLanguageProc(NULL, NULL, NULL);

    top = XtAppInitialize( &xtcontext, "XClipboard", table, XtNumber(table),
			  &argc, argv, NULL, NULL, 0);

    XtGetApplicationResources(top, (XtPointer)&userOptions, resources, 
			      XtNumber(resources), NULL, 0);

    XtAppAddActions (xtcontext,
		     xclipboard_actions, XtNumber (xclipboard_actions));
    /* CLIPBOARD_MANAGER is a non-standard mechanism */
    ManagerAtom = XInternAtom(XtDisplay(top), "CLIPBOARD_MANAGER", False);
    ClipboardAtom = XA_CLIPBOARD(XtDisplay(top));
    if (XGetSelectionOwner(XtDisplay(top), ManagerAtom))
	XtError("another clipboard is already running\n");

    parent = XtCreateManagedWidget("form", formWidgetClass, top, NULL, ZERO);
    quit = XtCreateManagedWidget("quit", Command, parent, NULL, ZERO);
    delete = XtCreateManagedWidget("delete", Command, parent, NULL, ZERO);
    new = XtCreateManagedWidget("new", Command, parent, NULL, ZERO);
    save = XtCreateManagedWidget("save", Command, parent, NULL, ZERO);
    nextButton = XtCreateManagedWidget("next", Command, parent, NULL, ZERO);
    prevButton = XtCreateManagedWidget("prev", Command, parent, NULL, ZERO);
    indexLabel = XtCreateManagedWidget("index", Label, parent, NULL, ZERO);

    n=0;
    XtSetArg(args[n], XtNtype, XawAsciiString); n++;
    XtSetArg(args[n], XtNeditType, XawtextEdit); n++;
    if (userOptions.wrap) {
	XtSetArg(args[n], XtNwrap, XawtextWrapWord); n++;
	XtSetArg(args[n], XtNscrollHorizontal, False); n++;
    }

    text = XtCreateManagedWidget( "text", Text, parent, args, n);
    
    currentClip = NewClip (text, (ClipPtr) 0);

    set_button_state ();

    fileDialogShell = XtCreatePopupShell("fileDialogShell",
					 transientShellWidgetClass,
					 top, NULL, ZERO);
    fileDialog = XtCreateManagedWidget ("fileDialog", dialogWidgetClass,
					fileDialogShell, NULL, ZERO);
    XawDialogAddButton(fileDialog, "accept", NULL, NULL);
    XawDialogAddButton(fileDialog, "cancel", NULL, NULL);

    failDialogShell = XtCreatePopupShell("failDialogShell",
					 transientShellWidgetClass,
					 top, NULL, ZERO);
    failDialog = XtCreateManagedWidget ("failDialog", dialogWidgetClass,
					failDialogShell, NULL, ZERO);
    XawDialogAddButton (failDialog, "continue", NULL, NULL);

    XtRealizeWidget(top);
    XtRealizeWidget(fileDialogShell);
    XtRealizeWidget(failDialogShell);
    XtOwnSelection(top, ManagerAtom, CurrentTime,
		   RefuseSelection, LoseManager, NULL);
    if (XGetSelectionOwner (XtDisplay(top), ClipboardAtom)) {
	LoseSelection (top, &ClipboardAtom);
    } else {
    	XtOwnSelection(top, ClipboardAtom, CurrentTime,
		       ConvertSelection, LoseSelection, NULL);
    }
    wm_delete_window = XInternAtom(XtDisplay(top), "WM_DELETE_WINDOW", False);
    wm_protocols = XInternAtom(XtDisplay(top), "WM_PROTOCOLS", False);
    (void) XSetWMProtocols(XtDisplay(top), XtWindow(top), &wm_delete_window,1);
    (void) XSetWMProtocols(XtDisplay(top), XtWindow(fileDialogShell),
			   &wm_delete_window,1);
    (void) XSetWMProtocols(XtDisplay(top), XtWindow(failDialogShell),
			   &wm_delete_window,1);
    XtAppMainLoop(xtcontext);
}