xref: /xsrc/external/mit/libXt/dist/src/GetValues.c

/*LINTLIBRARY*/

/***********************************************************
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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DEALINGS IN THE SOFTWARE.

Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.

                        All Rights Reserved

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/*

Copyright 1987, 1988, 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.

*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "IntrinsicI.h"
#include "StringDefs.h"

static int GetValues(
  char*			base,		/* Base address to fetch values from */
  XrmResourceList*      res,		/* The current resource values.      */
  register Cardinal	num_resources,	/* number of items in resources      */
  ArgList 		args,		/* The resource values requested     */
  Cardinal		num_args)	/* number of items in arg list       */
{
    register ArgList		arg;
    register Cardinal 		i;
    register XrmName		argName;
    register XrmResourceList*   xrmres;
    int				translation_arg_num = -1;
    static XrmQuark QCallback = NULLQUARK;
    static XrmQuark QTranslationTable = NULLQUARK;

    LOCK_PROCESS;
    if (QCallback == NULLQUARK) {
	QCallback = XrmPermStringToQuark(XtRCallback);
	QTranslationTable = XrmPermStringToQuark(XtRTranslationTable);
    }
    UNLOCK_PROCESS;

    /* Resource lists should be in compiled form already  */

    for (arg = args ; num_args != 0; num_args--, arg++) {
	argName = StringToName(arg->name);
	for (xrmres = res, i = 0; i < num_resources; i++, xrmres++) {
	    if (argName == (*xrmres)->xrm_name) {
		/* hack; do special cases here instead of a get_values_hook
		 * because get_values_hook looses info as to
		 * whether arg->value == NULL for ancient compatibility
		 * mode in _XtCopyToArg.  It helps performance, too...
		 */
		if ((*xrmres)->xrm_type == QCallback) {
		    XtCallbackList callback = _XtGetCallbackList(
			      (InternalCallbackList *)
			      (base - (*xrmres)->xrm_offset - 1));
		    _XtCopyToArg(
			      (char*)&callback, &arg->value,
			      (*xrmres)->xrm_size);
		}
		else if ((*xrmres)->xrm_type == QTranslationTable)
		    translation_arg_num = (int) (arg - args);
		else {
		    _XtCopyToArg(
			      base - (*xrmres)->xrm_offset - 1,
			      &arg->value,
			      (*xrmres)->xrm_size);
		}
		break;
	    }
	}
    }
    return translation_arg_num;
} /* GetValues */

static void CallGetValuesHook(
    WidgetClass	  widget_class,
    Widget	  w,
    ArgList	  args,
    Cardinal	  num_args)
{
    WidgetClass superclass;
    XtArgsProc get_values_hook;

    LOCK_PROCESS;
    superclass = widget_class->core_class.superclass;
    UNLOCK_PROCESS;
    if (superclass != NULL)
	CallGetValuesHook (superclass, w, args, num_args);

    LOCK_PROCESS;
    get_values_hook = widget_class->core_class.get_values_hook;
    UNLOCK_PROCESS;
    if (get_values_hook != NULL)
	(*get_values_hook) (w, args, &num_args);
}



static void CallConstraintGetValuesHook(
    WidgetClass	  widget_class,
    Widget	  w,
    ArgList	  args,
    Cardinal	  num_args)
{
    ConstraintClassExtension ext;

    LOCK_PROCESS;
    if (widget_class->core_class.superclass
	->core_class.class_inited & ConstraintClassFlag) {
	CallConstraintGetValuesHook
	    (widget_class->core_class.superclass, w, args, num_args);
    }

    for (ext = (ConstraintClassExtension)((ConstraintWidgetClass)widget_class)
		 ->constraint_class.extension;
	 ext != NULL && ext->record_type != NULLQUARK;
	 ext = (ConstraintClassExtension)ext->next_extension);

    if (ext != NULL) {
	if (  ext->version == XtConstraintExtensionVersion
	      && ext->record_size == sizeof(ConstraintClassExtensionRec)) {
	    if (ext->get_values_hook != NULL)
		(*(ext->get_values_hook)) (w, args, &num_args);
	} else {
	    String params[1];
	    Cardinal num_params = 1;
	    params[0] = widget_class->core_class.class_name;
	    XtAppWarningMsg(XtWidgetToApplicationContext(w),
		 "invalidExtension", "xtCreateWidget", XtCXtToolkitError,
		 "widget class %s has invalid ConstraintClassExtension record",
		 params, &num_params);
	}
    }
    UNLOCK_PROCESS;
}


void XtGetValues(
    register Widget   w,
    register ArgList  args,
    register Cardinal num_args)
{
    WidgetClass wc;
    int targ;
    XtAppContext app = XtWidgetToApplicationContext(w);

    if (num_args == 0) return;
    if ((args == NULL) && (num_args != 0)) {
	XtAppErrorMsg(app,
		"invalidArgCount","xtGetValues",XtCXtToolkitError,
            "Argument count > 0 on NULL argument list in XtGetValues",
              (String *)NULL, (Cardinal *)NULL);
    }

    LOCK_APP(app);
    wc = XtClass(w);
    LOCK_PROCESS;
    /* Get widget values */
    targ = GetValues((char*)w, (XrmResourceList *) wc->core_class.resources,
	wc->core_class.num_resources, args, num_args);
    UNLOCK_PROCESS;
    if (targ != -1 && XtIsWidget(w)) {
	XtTranslations translations = _XtGetTranslationValue(w);
	_XtCopyToArg((char*)&translations, &args[targ].value,
		     sizeof(XtTranslations));
    }

    /* Get constraint values if necessary */
    /* constraints may be NULL if constraint_size==0 */
    if (XtParent(w) != NULL && !XtIsShell(w) && XtIsConstraint(XtParent(w)) &&
	w->core.constraints) {
	ConstraintWidgetClass cwc
	    = (ConstraintWidgetClass) XtClass(XtParent(w));
	LOCK_PROCESS;
	GetValues((char*)w->core.constraints,
		  (XrmResourceList *)(cwc->constraint_class.resources),
		  cwc->constraint_class.num_resources, args, num_args);
	UNLOCK_PROCESS;
    }
    /* Notify any class procedures that we have performed get_values */
    CallGetValuesHook(wc, w, args, num_args);

    /* Notify constraint get_values if necessary */
    if (XtParent(w) != NULL && !XtIsShell(w) && XtIsConstraint(XtParent(w)))
	CallConstraintGetValuesHook(XtClass(XtParent(w)), w, args,num_args);
    UNLOCK_APP(app);
} /* XtGetValues */

void XtGetSubvalues(
  XtPointer	    base,           /* Base address to fetch values from */
  XtResourceList    resources,      /* The current resource values.      */
  Cardinal	    num_resources,  /* number of items in resources      */
  ArgList	    args,           /* The resource values requested     */
  Cardinal	    num_args)       /* number of items in arg list       */
{
    XrmResourceList* xrmres;
    xrmres = _XtCreateIndirectionTable(resources, num_resources);
    GetValues((char*)base, xrmres, num_resources, args, num_args);
    XtFree((char *)xrmres);
}