/*

Copyright 1989, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

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
OPEN GROUP 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 Open Group 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 Open Group.
 * *
 * Author:  Ralph Swick, DEC/Project Athena
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdlib.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/Xaw/Command.h>
#include <X11/Xaw/Box.h>
#include <X11/Xaw/Cardinals.h>
#include <X11/Xfuncs.h>

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

static XrmOptionDescRec optionDesc[] = {
    {"-selection", "selection",	XrmoptionSepArg, NULL},
    {"-select",    "selection",	XrmoptionSepArg, NULL},
    {"-sel",	   "selection",	XrmoptionSepArg, NULL},
    {"-s",	   "selection",	XrmoptionSepArg, NULL},
    {"-cutbuffer", "cutBuffer",	XrmoptionSepArg, NULL},
};

typedef struct {
    String  selection_name;
    int	    buffer;
    Atom    selection;
    char*   value;
    int     length;
} OptionsRec;

static OptionsRec options;

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

static XtResource resources[] = {
    {"selection", "Selection", XtRString, sizeof(String),
       Offset(selection_name), XtRString, "PRIMARY"},
    {"cutBuffer", "CutBuffer", XtRInt, sizeof(int),
       Offset(buffer), XtRImmediate, (XtPointer)0},
};

#undef Offset

typedef struct {
    Widget button;
    Boolean is_on;
} ButtonState;

static ButtonState state;

static void
Syntax(char *call)
{
    fprintf (stderr, "usage:  %s [-selection name] [-cutbuffer number]\n", 
	     call);
    exit (1);
}


static void 
StoreBuffer(Widget w, XtPointer client_data, Atom *selection, Atom *type, 
	    XtPointer value, unsigned long *length, int *format)
{

    if (*type == 0 || *type == XT_CONVERT_FAIL || *length == 0) {
#ifdef XKB
	XkbStdBell( XtDisplay(w), XtWindow(w), 0, XkbBI_MinorError );
#else
	XBell( XtDisplay(w), 0 );
#endif
	return;
    }

    XStoreBuffer( XtDisplay(w), (char*)value, (int)(*length),
		  options.buffer );
   
    XtFree(value);
}


static Boolean 
ConvertSelection(Widget w, Atom *selection, Atom *target,
		 Atom *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 + 4));
	targetP = *(Atom**)value;
	*length = std_length + 4;
	*targetP++ = XA_STRING;
	*targetP++ = XA_TEXT(d);
	*targetP++ = XA_LENGTH(d);
	*targetP++ = XA_LIST_LENGTH(d);
/*
	*targetP++ = XA_CHARACTER_POSITION(d);
*/
	memmove( (char*)targetP, (char*)std_targets, sizeof(Atom)*std_length);
	XtFree((char*)std_targets);
	*type = XA_ATOM;
	*format = 32;
	return True;
    }
    if (*target == XA_STRING || *target == XA_TEXT(d)) {
	*type = XA_STRING;
	*value = XtMalloc((Cardinal) options.length);
	memmove( (char *) *value, options.value, options.length);
	*length = options.length;
	*format = 8;
	return True;
    }
    if (*target == XA_LIST_LENGTH(d)) {
	long *temp = (long *) XtMalloc (sizeof(long));
	*temp = 1L;
	*value = (XtPointer) temp;
	*type = XA_INTEGER;
	*length = 1;
	*format = 32;
	return True;
    }
    if (*target == XA_LENGTH(d)) {
	long *temp = (long *) XtMalloc (sizeof(long));
	*temp = options.length;
	*value = (XtPointer) temp;
	*type = XA_INTEGER;
	*length = 1;
	*format = 32;
	return True;
    }
#ifdef notdef
    if (*target == XA_CHARACTER_POSITION(d)) {
	long *temp = (long *) XtMalloc (2 * sizeof(long));
	temp[0] = ctx->text.s.left + 1;
	temp[1] = ctx->text.s.right;
	*value = (XtPointer) temp;
	*type = XA_SPAN(d);
	*length = 2;
	*format = 32;
	return True;
    }
#endif /* notdef */
    if (XmuConvertStandardSelection(w, req->time, selection, target, type,
				    (XPointer *)value, length, format))
	return True;

    /* else */
    return False;
}


static void 
SetButton(ButtonState *state, Boolean on)
{
    if (state->is_on != on) {
	Arg args[2];
	Pixel fg, bg;
	XtSetArg( args[0], XtNforeground, &fg );
	XtSetArg( args[1], XtNbackground, &bg );
	XtGetValues( state->button, args, TWO );
	args[0].value = (XtArgVal)bg;
	args[1].value = (XtArgVal)fg;
	XtSetValues( state->button, args, TWO );
	state->is_on = on;
    }
}


static void 
LoseSelection(Widget w, Atom *selection)
{
    if (options.value) {
	XFree( options.value );
	options.value = NULL;
    }
    SetButton(&state, False);
}


/* ARGSUSED */
static void 
Quit(Widget w, XtPointer closure, XtPointer callData)
{
    XtCloseDisplay( XtDisplay(w) );
    exit(0);
}


/* ARGSUSED */
static void 
GetSelection(Widget w, XtPointer closure, XtPointer callData)
{
    XtGetSelectionValue(w, options.selection, XA_STRING,
			StoreBuffer, NULL,
			XtLastTimestampProcessed(XtDisplay(w)));
}


/* ARGSUSED */
static void 
GetBuffer(Widget w, XtPointer closure, XtPointer callData)
{
    if (options.value) XFree( options.value );
    options.value =
	XFetchBuffer(XtDisplay(w), &options.length, options.buffer);
    if (options.value != NULL) {
	if (XtOwnSelection(w, options.selection,
			   XtLastTimestampProcessed(XtDisplay(w)),
			   ConvertSelection, LoseSelection, NULL))
	    SetButton((ButtonState*)closure, True);
    }
}


int 
main(int argc, char *argv[])
{
    char *label;
    Widget box, button;
    XtAppContext appcon;
    Widget shell;
    XrmDatabase rdb;

    XtSetLanguageProc(NULL, NULL, NULL);

    shell =
	XtAppInitialize( &appcon, "XCutsel", optionDesc, XtNumber(optionDesc),
			 &argc, argv, NULL, NULL, 0 );
    rdb = XtDatabase(XtDisplay(shell));

    if (argc != 1) Syntax(argv[0]);

    XtGetApplicationResources( shell, (XtPointer)&options,
			       resources, XtNumber(resources),
			       NULL, ZERO );

    options.value = NULL;
    XmuInternStrings( XtDisplay(shell), &options.selection_name, ONE,
		      &options.selection );

    box = XtCreateManagedWidget("box", boxWidgetClass, shell, NULL, ZERO);

    button =
	XtCreateManagedWidget("quit", commandWidgetClass, box, NULL, ZERO);
	XtAddCallback( button, XtNcallback, Quit, NULL );

    /* %%% hack alert... */
    XtAsprintf(&label, "*label:copy %s to %d",
	    options.selection_name,
	    options.buffer);
    XrmPutLineResource( &rdb, label );
    XtFree(label);

    button =
	XtCreateManagedWidget("sel-cut", commandWidgetClass, box, NULL, ZERO);
	XtAddCallback( button, XtNcallback, GetSelection, NULL );

    XtAsprintf(&label, "*label:copy %d to %s",
	    options.buffer,
	    options.selection_name);
    XrmPutLineResource( &rdb, label );
    XtFree(label);

    button =
	XtCreateManagedWidget("cut-sel", commandWidgetClass, box, NULL, ZERO);
	XtAddCallback( button, XtNcallback, GetBuffer, (XtPointer)&state );
 	state.button = button;
	state.is_on = False;
   
    XtRealizeWidget(shell);
    XtAppMainLoop(appcon);
    exit(0);
}