/* $XConsortium: LocBitmap.c,v 1.19 94/04/17 20:16:10 rws Exp $ */

/*
 
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.

*/
/* $XFree86: xc/lib/Xmu/LocBitmap.c,v 3.1.4.1 1998/05/16 09:05:26 dawes Exp $ */

/*
 * Author:  Jim Fulton, MIT X Consortium
 */

#include <X11/Xlib.h>
#ifndef X_NOT_STDC_ENV
#include <stdlib.h>
#include <string.h>
#endif
#include <X11/Xresource.h>
#include <X11/Xutil.h>
#include <X11/Xmu/CvtCache.h>
#include <X11/Xmu/Drawing.h>

#ifndef X_NOT_POSIX
#ifdef _POSIX_SOURCE
#include <limits.h>
#else
#define _POSIX_SOURCE
#include <limits.h>
#undef _POSIX_SOURCE
#endif
#endif /* X_NOT_POSIX */
#ifndef PATH_MAX
#ifdef WIN32
#define PATH_MAX 512
#else
#include <sys/param.h>
#endif
#ifndef PATH_MAX
#ifdef MAXPATHLEN
#define PATH_MAX MAXPATHLEN
#else
#define PATH_MAX 1024
#endif
#endif
#endif /* PATH_MAX */

static char **split_path_string();


/*
 * XmuLocateBitmapFile - read a bitmap file using the normal defaults
 */

#if NeedFunctionPrototypes
Pixmap XmuLocateBitmapFile (Screen *screen, _Xconst char *name, char *srcname,
			    int srcnamelen, int *widthp, int *heightp, 
			    int *xhotp, int *yhotp)
#else
Pixmap XmuLocateBitmapFile (screen, name, srcname, srcnamelen,
			    widthp, heightp, xhotp, yhotp)
    Screen *screen;
    char *name;
    char *srcname;			/* RETURN */
    int srcnamelen;
    int *widthp, *heightp, *xhotp, *yhotp;  /* RETURN */
#endif
{
    return XmuLocatePixmapFile (screen, name, 
				(unsigned long) 1, (unsigned long) 0,
				(unsigned int) 1, srcname, srcnamelen,
				widthp, heightp, xhotp, yhotp);
}


/*
 * version that reads pixmap data as well as bitmap data
 */
#if NeedFunctionPrototypes
Pixmap XmuLocatePixmapFile (Screen *screen, _Xconst char *name, 
			    unsigned long fore, unsigned long back, 
			    unsigned int depth, 
			    char *srcname, int srcnamelen,
			    int *widthp, int *heightp, int *xhotp, int *yhotp)
#else
Pixmap XmuLocatePixmapFile (screen, name, fore, back, depth, 
			    srcname, srcnamelen,
			    widthp, heightp, xhotp, yhotp)
    Screen *screen;
    char *name;
    unsigned long fore, back;
    unsigned int depth;
    char *srcname;			/* RETURN */
    int srcnamelen;
    int *widthp, *heightp, *xhotp, *yhotp;  /* RETURN */
#endif
{
    Display *dpy = DisplayOfScreen (screen);
    Window root = RootWindowOfScreen (screen);
    Bool try_plain_name = True;
    XmuCvtCache *cache = _XmuCCLookupDisplay (dpy);
    char **file_paths = (char **) NULL;
    char filename[PATH_MAX];
    unsigned int width, height;
    int xhot, yhot;
    int i;

    /*
     * look in cache for bitmap path
     */
    if (cache) {
	if (!cache->string_to_bitmap.bitmapFilePath) {
	    XrmName xrm_name[2];
	    XrmClass xrm_class[2];
	    XrmRepresentation rep_type;
	    XrmValue value;

	    xrm_name[0] = XrmPermStringToQuark ("bitmapFilePath");
	    xrm_name[1] = NULLQUARK;
	    xrm_class[0] = XrmPermStringToQuark ("BitmapFilePath");
	    xrm_class[1] = NULLQUARK;
	    if (!XrmGetDatabase(dpy)) {
		/* what a hack; need to initialize it */
		(void) XGetDefault (dpy, "", "");
	    }
	    if (XrmQGetResource (XrmGetDatabase(dpy), xrm_name, xrm_class, 
				 &rep_type, &value) &&
		rep_type == XrmPermStringToQuark("String")) {
		cache->string_to_bitmap.bitmapFilePath = 
		  split_path_string (value.addr);
	    }
	}
	file_paths = cache->string_to_bitmap.bitmapFilePath;
    }


    /*
     * Search order:
     *    1.  name if it begins with / or ./
     *    2.  "each prefix in file_paths"/name
     *    3.  BITMAPDIR/name
     *    4.  name if didn't begin with / or .
     */

#ifndef BITMAPDIR
#define BITMAPDIR "/usr/include/X11/bitmaps"
#endif

    for (i = 1; i <= 4; i++) {
	char *fn = filename;
	Pixmap pixmap;
	unsigned char *data;

	switch (i) {
	  case 1:
#ifndef __EMX__
	    if (!(name[0] == '/' || (name[0] == '.') && name[1] == '/')) 
#else
	    if (!(name[0] == '/' || (name[0] == '.' && name[1] == '/') ||
		  (isalpha(name[0]) && name[1] == ':')))
#endif
	      continue;
	    fn = (char *) name;
	    try_plain_name = False;
	    break;
	  case 2:
	    if (file_paths && *file_paths) {
		if (strlen(*file_paths) + strlen(name) + 2 > sizeof(filename))
		    continue;
		sprintf (filename, "%s/%s", *file_paths, name);
		file_paths++;
		i--;
		break;
	    }
	    continue;
	  case 3:
	    if (strlen(BITMAPDIR) + strlen(name) + 2 > sizeof(filename))
		continue;
	    sprintf (filename, "%s/%s", BITMAPDIR, name);
	    break;
	  case 4:
	    if (!try_plain_name) continue;
	    fn = (char *) name;
	    break;
	}

	data = NULL;
	pixmap = None;
#ifdef __EMX__
	fn = (char*)__XOS2RedirRoot(fn);
#endif
	if (XmuReadBitmapDataFromFile (fn, &width, &height, &data,
				       &xhot, &yhot) == BitmapSuccess) {
	    pixmap = XCreatePixmapFromBitmapData (dpy, root, (char *) data,
						  width, height,
						  fore, back, depth);
	    XFree ((char *)data);
	}

	if (pixmap) {
	    if (widthp) *widthp = (int)width;
	    if (heightp) *heightp = (int)height;
	    if (xhotp) *xhotp = xhot;
	    if (yhotp) *yhotp = yhot;
	    if (srcname && srcnamelen > 0) {
		strncpy (srcname, fn, srcnamelen - 1);
		srcname[srcnamelen - 1] = '\0';
	    }
	    return pixmap;
	}
    }

    return None;
}


/*
 * split_path_string - split a colon-separated list into its constituent
 * parts; to release, free list[0] and list.
 */
static char **split_path_string (src)
    register char *src;
{
    int nelems = 1;
    register char *dst;
    char **elemlist, **elem;

    /* count the number of elements */
    for (dst = src; *dst; dst++) if (*dst == ':') nelems++;

    /* get memory for everything */
    dst = (char *) malloc (dst - src + 1);
    if (!dst) return NULL;
    elemlist = (char **) calloc ((nelems + 1), sizeof (char *));
    if (!elemlist) {
	free (dst);
	return NULL;
    }

    /* copy to new list and walk up nulling colons and setting list pointers */
    strcpy (dst, src);
    for (elem = elemlist, src = dst; *src; src++) {
	if (*src == ':') {
	    *elem++ = dst;
	    *src = '\0';
	    dst = src + 1;
	}
    }
    *elem = dst;

    return elemlist;
}


void _XmuStringToBitmapInitCache (c)
    register XmuCvtCache *c;
{
    c->string_to_bitmap.bitmapFilePath = NULL;
}

void _XmuStringToBitmapFreeCache (c)
    register XmuCvtCache *c;
{
    if (c->string_to_bitmap.bitmapFilePath) {
	if (c->string_to_bitmap.bitmapFilePath[0]) 
	  free (c->string_to_bitmap.bitmapFilePath[0]);
	free ((char *) (c->string_to_bitmap.bitmapFilePath));
    }
}
