/*

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:  Jim Fulton, MIT X Consortium

 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdio.h>

#include <stdlib.h>

#include <X11/Xos.h>

#include <X11/IntrinsicP.h>

#include <X11/Xmu/CharSet.h>

#include <X11/Xmu/WidgetNode.h>

/*

 * Prototypes

 */

static char *binsearch(char*, char*, int, int,

		       int (*__compar)(_Xconst void*, _Xconst void*));

static int compare_resource_entries(_Xconst void *a,  _Xconst void *b);

static XmuWidgetNode *find_resource(XmuWidgetNode*, char*, Bool);

static void mark_resource_owner(XmuWidgetNode*);

/*

 * Implementation

 */

static char *

binsearch(char *key, char *base, int nelems, int elemsize,

	  int compar(_Xconst void*, _Xconst void*))

     /*

      * key		- template of object to find

      * base		- beginning of array

      * nelems		- number of elements in array

      * elemsize	- sizeof an element

      * compar		- qsort-style compare function

      */

{

    int lower = 0, upper = nelems - 1;

    while (lower <= upper) {

	int middle = (lower + upper) / 2;

	char *p = base + middle * elemsize;

	int res = (*compar) (p, key);

	if (res < 0) {

	    lower = middle + 1;

	} else if (res == 0) {

	    return p;

	} else {

	    upper = middle - 1;

	}

    }

    return NULL;

}

static int

compare_resource_entries(register _Xconst void *a,

			 register _Xconst void *b)

{

    return strcmp (((_Xconst XtResource *)a)->resource_name,

		   ((_Xconst XtResource *)b)->resource_name);

}

static XmuWidgetNode *

find_resource(XmuWidgetNode *node, char *name, Bool cons)

{

    register XmuWidgetNode *sup;

    XtResource res;

#define reslist ((char *) (cons ? sup->constraints : sup->resources))

#define nreslist (int) (cons ? sup->nconstraints : sup->nresources)

    res.resource_name = name;

    for (sup = node->superclass;

	 sup && (XtResourceList) binsearch ((char *) &res,

					    reslist, nreslist,

					    sizeof(XtResource),

					    compare_resource_entries);

	 node = sup, sup = sup->superclass) ;

#undef reslist

#undef nreslist

    return node;

}

static void

mark_resource_owner(register XmuWidgetNode *node)

{

    register Cardinal i;

    XtResourceList childres;

    childres = node->resources;

    for (i = 0; i < node->nresources; i++, childres++) {

	node->resourcewn[i] = find_resource (node, childres->resource_name,

					     False);

    }

    childres = node->constraints;

    for (i = 0; i < node->nconstraints; i++, childres++) {

	node->constraintwn[i] = find_resource (node, childres->resource_name,

						True);

    }

}

/*

 * 			       Public Interfaces

 */

void

XmuWnInitializeNodes(XmuWidgetNode *nodearray, int nnodes)

{

    int i;

    XmuWidgetNode *wn;

    /*

     * Assume that the node array is in alphabetic order, so we need to

     * search backwards to make sure that the children are listed forward.

     */

    for (i = nnodes - 1, wn = nodearray + (nnodes - 1); i >= 0; i--, wn--) {

	WidgetClass superclass = XmuWnSuperclass(wn);

	int j;

	XmuWidgetNode *swn;

	int lablen = strlen (wn->label);

	int namelen = strlen (XmuWnClassname(wn));

	wn->lowered_label = XtMalloc (lablen + namelen + 2);

#if 0

	/* XtMalloc exits if failed */

	if (!wn->lowered_label) {

	    fprintf (stderr,

		     "%s:  unable to allocate %d bytes for widget name\n",

		     "XmuWnInitializeNodes", lablen + namelen + 2);

	    exit (1);

	}

#endif

	wn->lowered_classname = wn->lowered_label + (lablen + 1);

	XmuCopyISOLatin1Lowered (wn->lowered_label, wn->label);

	XmuCopyISOLatin1Lowered (wn->lowered_classname, XmuWnClassname(wn));

	wn->superclass = NULL;

	wn->have_resources = False;

	wn->resources = NULL;

	wn->resourcewn = NULL;

	wn->nresources = 0;

	wn->constraints = NULL;

	wn->constraintwn = NULL;

	wn->nconstraints = 0;

	wn->data = (XtPointer) NULL;

	/*

	 * walk up the superclass chain

	 */

	while (superclass) {

	    for (j = 0, swn = nodearray; j < nnodes; j++, swn++) {

		if (superclass == XmuWnClass(swn)) {

		    wn->superclass = swn;

		    goto done;		/* stupid C language */

	        }

	    }

	    /*

	     * Hmm, we have a hidden superclass (such as in core in R4); just

	     * ignore it and keep on walking

	     */

	    superclass = superclass->core_class.superclass;

	}

      done:

	if (wn->superclass) {

	    wn->siblings = wn->superclass->children;

	    wn->superclass->children = wn;

	}

    }

    return;

}

void

XmuWnFetchResources(XmuWidgetNode *node, Widget toplevel,

		    XmuWidgetNode *topnode)

{

    Widget dummy;

    XmuWidgetNode *wn;

    if (node->have_resources) return;

    dummy = XtCreateWidget (node->label, XmuWnClass(node), toplevel,

			    NULL, 0);

    if (dummy) XtDestroyWidget (dummy);

    /*

     * walk up tree geting resources; since we've instantiated the widget,

     * we know that all of our superclasses have been initialized

     */

    for (wn = node; wn && !wn->have_resources; wn = wn->superclass) {

	XtGetResourceList (XmuWnClass(wn), &wn->resources, &wn->nresources);

	if (wn->resources) {

	    qsort ((char *) wn->resources, wn->nresources,

		   sizeof(XtResource), compare_resource_entries);

	}

	wn->resourcewn = (XmuWidgetNode **) XtCalloc (wn->nresources,

						  sizeof (XmuWidgetNode *));

	if (!wn->resourcewn) {

	    fprintf (stderr,

		     "%s:  unable to calloc %d %ld byte widget node ptrs\n",

		     "XmuWnFetchResources", wn->nresources,

		     (unsigned long)sizeof (XmuWidgetNode *));

	    exit (1);

	}

	XtGetConstraintResourceList (XmuWnClass(wn), &wn->constraints,

				     &wn->nconstraints);

	if (wn->constraints) {

	    qsort ((char *) wn->constraints, wn->nconstraints,

		   sizeof(XtResource), compare_resource_entries);

	}

	wn->constraintwn = (XmuWidgetNode **)

	  XtCalloc (wn->nconstraints, sizeof (XmuWidgetNode *));

	if (!wn->constraintwn) {

	    fprintf (stderr,

		     "%s:  unable to calloc %d %ld byte widget node ptrs\n",

		     "XmuWnFetchResources", wn->nconstraints,

		     (unsigned long)sizeof (XmuWidgetNode *));

	    exit (1);

	}

	wn->have_resources = True;

	if (wn == topnode) break;

    }

    /*

     * Walk up tree removing all resources that appear in superclass; we can

     * mash the resource list in place since it was copied out of widget.

     */

    for (wn = node; wn; wn = wn->superclass) {

	mark_resource_owner (wn);

	if (wn == topnode) break;

    }

    return;

}

int

XmuWnCountOwnedResources(XmuWidgetNode *node, XmuWidgetNode *ownernode,

			 Bool cons)

{

    register int i;

    XmuWidgetNode **wn = (cons ? node->constraintwn : node->resourcewn);

    int nmatches = 0;

    for (i = (cons ? node->nconstraints : node->nresources); i > 0; i--, wn++)

      if (*wn == ownernode) nmatches++;

    return nmatches;

}

XmuWidgetNode *

XmuWnNameToNode(XmuWidgetNode *nodelist, int nnodes, _Xconst char *name)

{

    int i;

    XmuWidgetNode *wn;

    char tmp[1024];

    XmuNCopyISOLatin1Lowered(tmp, name, sizeof(tmp));

    for (i = 0, wn = nodelist; i < nnodes; i++, wn++) {

	if (strcmp (tmp, wn->lowered_label) == 0 ||

	    strcmp (tmp, wn->lowered_classname) == 0) {

	  return wn;

	}

    }

    return NULL;

}