xenocara/app/bitmap/CutPaste.c

/*

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:  Davor Matic, MIT X Consortium
 */

#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include <X11/Xatom.h>
#include "BitmapP.h"

#include <stdio.h>
#include <math.h>

#define min(x, y)                     (((x) < (y)) ? (x) : (y))
#define max(x, y)                     (((x) > (y)) ? (x) : (y))



/*****************************************************************************
 *                               Cut and Paste                               *
 *****************************************************************************/

/* ARGSUSED */
static Boolean
ConvertSelection(Widget w, Atom *selection, Atom *target, Atom *type,
		 XtPointer *val_ret, unsigned long *length, int *format)
{
    XPointer *value = (XPointer *)val_ret;
    BitmapWidget BW = (BitmapWidget) w;
    Pixmap *pixmap;
    char *data;
    XImage *image;
    Dimension width, height;

    switch (*target) {

/*  XA_TARGETS undefined ?!?

    case XA_TARGETS:
	*type = XA_ATOM;
	*value = (XPointer) bitmapClassRec.bitmap_class.targets;
	*length = bitmapClassRec.bitmap_class.num_targets;
	*format = 32;
	return True;

*/

    case XA_BITMAP:
    case XA_PIXMAP:
	if (BWQueryMarked(w)) {
	  width = BW->bitmap.mark.to_x - BW->bitmap.mark.from_x + 1;
	  height = BW->bitmap.mark.to_y - BW->bitmap.mark.from_y + 1;
	  data = CreateCleanData(Length(width, height));
	  image = CreateBitmapImage(BW, data, width, height);
	  CopyImageData(BW->bitmap.image, image,
			BW->bitmap.mark.from_x, BW->bitmap.mark.from_y,
			BW->bitmap.mark.to_x, BW->bitmap.mark.to_y, 0, 0);
	  pixmap = (Pixmap *) XtMalloc(sizeof(Pixmap));
	  *pixmap = GetPixmap(BW, image);
	  DestroyBitmapImage(&image);
	}
	else if (BWQueryStored(w)) {
	  pixmap = (Pixmap *) XtMalloc(sizeof(Pixmap));
	  *pixmap = GetPixmap(BW, BW->bitmap.storage);
	}
	else return False;
	*type = XA_PIXMAP;
	*value = (XPointer) pixmap;
	*length = 1;
	*format = 32;
	return True;

    default:
	return False;
    }
}

/* ARGSUSED */
static void
LoseSelection(Widget w, Atom selection)
{
    BitmapWidget BW = (BitmapWidget) w;

    if (DEBUG)
	fprintf(stderr, "Lost Selection\n");
    BW->bitmap.selection.own = False;

    BWUnmark(w);
}

/* ARGSUSED */
static void
SelectionDone(Widget w, Atom *selection, Atom *target)
{
/*  Done Automatically ?!?

    BitmapWidget BW = (BitmapWidget) w;

    if (*target != XA_TARGETS)
	XtFree(BW->bitmap.value);

*/
}

void
BWGrabSelection(Widget w, Time btime)
{
    BitmapWidget BW = (BitmapWidget) w;

    BW->bitmap.selection.own = XtOwnSelection(w, XA_PRIMARY, btime,
					      ConvertSelection,
					      (XtLoseSelectionProc)LoseSelection,
					      SelectionDone);
	if (DEBUG && BW->bitmap.selection.own)
	    fprintf(stderr, "Own the selection\n");
}


/* ARGSUSED */
static void
SelectionCallback(Widget w, XtPointer cldat, Atom *selection, Atom *type,
		  XtPointer val, unsigned long *length, int *format)
{
    XPointer value = (XPointer)val;
    BitmapWidget BW = (BitmapWidget) w;
    Pixmap *pixmap;

   switch (*type) {

    case XA_BITMAP:
    case XA_PIXMAP:
	DestroyBitmapImage(&BW->bitmap.storage);
	pixmap = (Pixmap *) value;
	BW->bitmap.storage = GetImage(BW, *pixmap);
	XFree((char *)pixmap);
	break;

    default:
	XtWarning(" selection request failed.  BitmapWidget");
	break;
    }

    BW->bitmap.selection.limbo = FALSE;
}

void
BWRequestSelection(Widget w, Time btime, Boolean wait)
{
  BitmapWidget BW = (BitmapWidget) w;

  if (BW->bitmap.selection.own)
    BWStore(w);
  else {
    XtGetSelectionValue(w, XA_PRIMARY, XA_PIXMAP,
			SelectionCallback, NULL, btime);

    BW->bitmap.selection.limbo = TRUE;

    if (wait)
      while (BW->bitmap.selection.limbo) {
	XEvent event;
	XtNextEvent(&event);
	XtDispatchEvent(&event);
      }
  }
}

/* ARGSUSED */
/* Returns true if there is a transferable selection */
Boolean
BWQuerySelection(Widget w, Time btime)
{
/* To be written.  XA_TARGETS to be used.  So far undefined ?!? */

  return True;
}
/*****************************************************************************/