libXt-1.2.1/src/SetValues.c

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/*

Copyright 1987, 1988, 1994, 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"

/*
 *      XtSetValues(), XtSetSubvalues()
 */

static void
SetValues(char *base,                           /* Base address to write values to */
          XrmResourceList *res,                 /* The current resource values. */
          register Cardinal num_resources,      /* number of items in resources      */
          ArgList args,                         /* The resource values to set */
          Cardinal num_args)                    /* number of items in arg list       */
{
    register ArgList arg;
    register Cardinal i;
    register XrmName argName;
    register XrmResourceList *xrmres;

    /* Resource lists are assumed to be in compiled form already via the
       initial XtGetResources, XtGetSubresources calls */

    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) {
                _XtCopyFromArg(arg->value,
                               base - (*xrmres)->xrm_offset - 1,
                               (*xrmres)->xrm_size);
                break;
            }
        }
    }
}                               /* SetValues */

static Boolean
CallSetValues(WidgetClass class,
              Widget current,
              Widget request,
              Widget new,
              ArgList args,
              Cardinal num_args)
{
    Boolean redisplay = FALSE;
    WidgetClass superclass;
    XtArgsFunc set_values_hook;
    XtSetValuesFunc set_values;

    LOCK_PROCESS;
    superclass = class->core_class.superclass;
    UNLOCK_PROCESS;
    if (superclass)
        redisplay =
            CallSetValues(superclass, current, request, new, args, num_args);

    LOCK_PROCESS;
    set_values = class->core_class.set_values;
    UNLOCK_PROCESS;
    if (set_values)
        redisplay |= (*set_values) (current, request, new, args, &num_args);

    LOCK_PROCESS;
    set_values_hook = class->core_class.set_values_hook;
    UNLOCK_PROCESS;
    if (set_values_hook)
        redisplay |= (*set_values_hook) (new, args, &num_args);
    return (redisplay);
}

static Boolean
CallConstraintSetValues(ConstraintWidgetClass class,
                        Widget current,
                        Widget request,
                        Widget new,
                        ArgList args,
                        Cardinal num_args)
{
    Boolean redisplay = FALSE;
    XtSetValuesFunc set_values;

    if ((WidgetClass) class != constraintWidgetClass) {
        ConstraintWidgetClass superclass;

        if (class == NULL) {
            XtAppErrorMsg(XtWidgetToApplicationContext(current),
                          "invalidClass", "constraintSetValue",
                          XtCXtToolkitError,
                          "Subclass of Constraint required in CallConstraintSetValues",
                          NULL, NULL);
        }
        else {
            LOCK_PROCESS;
            superclass = (ConstraintWidgetClass) class->core_class.superclass;
            UNLOCK_PROCESS;
            redisplay =
                CallConstraintSetValues(superclass,
                                        current, request, new, args, num_args);
        }
    }
    LOCK_PROCESS;
    set_values = class ? class->constraint_class.set_values : NULL;
    UNLOCK_PROCESS;
    if (set_values)
        redisplay |= (*set_values) (current, request, new, args, &num_args);
    return (redisplay);
}

void
XtSetSubvalues(XtPointer base,                  /* Base address to write values to */
               register XtResourceList resources,       /* The current resource values.      */
               register Cardinal num_resources, /* number of items in resources      */
               ArgList args,                    /* The resource values to set */
               Cardinal num_args)               /* number of items in arg list       */
{
    register XrmResourceList *xrmres;

    xrmres = _XtCreateIndirectionTable(resources, num_resources);
    SetValues((char *) base, xrmres, num_resources, args, num_args);
    XtFree((char *) xrmres);
}

void
XtSetValues(register Widget w, ArgList args, Cardinal num_args)
{
    register Widget oldw, reqw;

    /* need to use strictest alignment rules possible in next two decls. */
    double oldwCache[100], reqwCache[100];
    double oldcCache[20], reqcCache[20];
    Cardinal widgetSize, constraintSize;
    Boolean redisplay, cleared_rect_obj = False;
    XtGeometryResult result;
    XtWidgetGeometry geoReq, geoReply;
    WidgetClass wc;
    ConstraintWidgetClass cwc = NULL;
    Boolean hasConstraints;
    XtAppContext app = XtWidgetToApplicationContext(w);
    Widget hookobj = XtHooksOfDisplay(XtDisplayOfObject(w));

    LOCK_APP(app);
    wc = XtClass(w);
    if ((args == NULL) && (num_args != 0)) {
        XtAppErrorMsg(app,
                      "invalidArgCount", "xtSetValues", XtCXtToolkitError,
                      "Argument count > 0 on NULL argument list in XtSetValues",
                      NULL, NULL);
    }

    /* Allocate and copy current widget into old widget */

    LOCK_PROCESS;
    widgetSize = wc->core_class.widget_size;
    UNLOCK_PROCESS;
    oldw = (Widget) XtStackAlloc(widgetSize, oldwCache);
    reqw = (Widget) XtStackAlloc(widgetSize, reqwCache);
    (void) memmove((char *) oldw, (char *) w, (size_t) widgetSize);

    /* Set resource values */

    LOCK_PROCESS;
    SetValues((char *) w, (XrmResourceList *) wc->core_class.resources,
              wc->core_class.num_resources, args, num_args);
    UNLOCK_PROCESS;

    (void) memmove((char *) reqw, (char *) w, (size_t) widgetSize);

    hasConstraints = (XtParent(w) != NULL && !XtIsShell(w) &&
                      XtIsConstraint(XtParent(w)));

    /* Some widget sets apparently do ugly things by freeing the
     * constraints on some children, thus the extra test here */
    if (hasConstraints) {
        cwc = (ConstraintWidgetClass) XtClass(w->core.parent);
        if (w->core.constraints) {
            LOCK_PROCESS;
            constraintSize = cwc->constraint_class.constraint_size;
            UNLOCK_PROCESS;
        }
        else
            constraintSize = 0;
    }
    else
        constraintSize = 0;

    if (constraintSize) {
        /* Allocate and copy current constraints into oldw */
        oldw->core.constraints = XtStackAlloc(constraintSize, oldcCache);
        reqw->core.constraints = XtStackAlloc(constraintSize, reqcCache);
        (void) memmove((char *) oldw->core.constraints,
                       (char *) w->core.constraints, (size_t) constraintSize);

        /* Set constraint values */
        LOCK_PROCESS;
        SetValues((char *) w->core.constraints,
                  (XrmResourceList *) (cwc->constraint_class.resources),
                  cwc->constraint_class.num_resources, args, num_args);
        UNLOCK_PROCESS;
        (void) memmove((char *) reqw->core.constraints,
                       (char *) w->core.constraints, (size_t) constraintSize);
    }

    /* Inform widget of changes, then inform parent of changes */
    redisplay = CallSetValues(wc, oldw, reqw, w, args, num_args);
    if (hasConstraints) {
        redisplay |=
            CallConstraintSetValues(cwc, oldw, reqw, w, args, num_args);
    }

    if (XtHasCallbacks(hookobj, XtNchangeHook) == XtCallbackHasSome) {
        XtChangeHookDataRec call_data;
        XtChangeHookSetValuesDataRec set_val;

        set_val.old = oldw;
        set_val.req = reqw;
        set_val.args = args;
        set_val.num_args = num_args;
        call_data.type = XtHsetValues;
        call_data.widget = w;
        call_data.event_data = (XtPointer) &set_val;
        XtCallCallbackList(hookobj,
                           ((HookObject) hookobj)->hooks.changehook_callbacks,
                           (XtPointer) &call_data);
    }

    if (XtIsRectObj(w)) {
        /* Now perform geometry request if needed */
        geoReq.request_mode = 0;
        if (oldw->core.x != w->core.x) {
            geoReq.x = w->core.x;
            w->core.x = oldw->core.x;
            geoReq.request_mode |= CWX;
        }
        if (oldw->core.y != w->core.y) {
            geoReq.y = w->core.y;
            w->core.y = oldw->core.y;
            geoReq.request_mode |= CWY;
        }
        if (oldw->core.width != w->core.width) {
            geoReq.width = w->core.width;
            w->core.width = oldw->core.width;
            geoReq.request_mode |= CWWidth;
        }
        if (oldw->core.height != w->core.height) {
            geoReq.height = w->core.height;
            w->core.height = oldw->core.height;
            geoReq.request_mode |= CWHeight;
        }
        if (oldw->core.border_width != w->core.border_width) {
            geoReq.border_width = w->core.border_width;
            w->core.border_width = oldw->core.border_width;
            geoReq.request_mode |= CWBorderWidth;
        }

        if (geoReq.request_mode != 0) {
            /* Pass on any requests for unchanged geometry values */
            if (geoReq.request_mode !=
                (CWX | CWY | CWWidth | CWHeight | CWBorderWidth)) {
                for (; num_args != 0; num_args--, args++) {
                    if (!(geoReq.request_mode & CWX) &&
                        strcmp(XtNx, args->name) == 0) {
                        geoReq.x = w->core.x;
                        geoReq.request_mode |= CWX;
                    }
                    else if (!(geoReq.request_mode & CWY) &&
                             strcmp(XtNy, args->name) == 0) {
                        geoReq.y = w->core.y;
                        geoReq.request_mode |= CWY;
                    }
                    else if (!(geoReq.request_mode & CWWidth) &&
                             strcmp(XtNwidth, args->name) == 0) {
                        geoReq.width = w->core.width;
                        geoReq.request_mode |= CWWidth;
                    }
                    else if (!(geoReq.request_mode & CWHeight) &&
                             strcmp(XtNheight, args->name) == 0) {
                        geoReq.height = w->core.height;
                        geoReq.request_mode |= CWHeight;
                    }
                    else if (!(geoReq.request_mode & CWBorderWidth) &&
                             strcmp(XtNborderWidth, args->name) == 0) {
                        geoReq.border_width = w->core.border_width;
                        geoReq.request_mode |= CWBorderWidth;
                    }
                }
            }
            CALLGEOTAT(_XtGeoTrace(w,
                                   "\nXtSetValues sees some geometry changes for \"%s\".\n",
                                   XtName(w)));
            CALLGEOTAT(_XtGeoTab(1));
            do {
                XtGeometryHookDataRec call_data;
                XtAlmostProc set_values_almost;

                if (XtHasCallbacks(hookobj, XtNgeometryHook) ==
                    XtCallbackHasSome) {
                    call_data.type = XtHpreGeometry;
                    call_data.widget = w;
                    call_data.request = &geoReq;
                    XtCallCallbackList(hookobj,
                                       ((HookObject) hookobj)->hooks.
                                       geometryhook_callbacks,
                                       (XtPointer) &call_data);
                    call_data.result = result =
                        _XtMakeGeometryRequest(w, &geoReq, &geoReply,
                                               &cleared_rect_obj);
                    call_data.type = XtHpostGeometry;
                    call_data.reply = &geoReply;
                    XtCallCallbackList(hookobj,
                                       ((HookObject) hookobj)->hooks.
                                       geometryhook_callbacks,
                                       (XtPointer) &call_data);
                }
                else {
                    result = _XtMakeGeometryRequest(w, &geoReq, &geoReply,
                                                    &cleared_rect_obj);
                }
                if (result == XtGeometryYes || result == XtGeometryDone)
                    break;

                /* An Almost or No reply.  Call widget and let it munge
                   request, reply */
                LOCK_PROCESS;
                set_values_almost = wc->core_class.set_values_almost;
                UNLOCK_PROCESS;
                if (set_values_almost == NULL) {
                    XtAppWarningMsg(app,
                                    "invalidProcedure", "set_values_almost",
                                    XtCXtToolkitError,
                                    "set_values_almost procedure shouldn't be NULL",
                                    NULL, NULL);
                    break;
                }
                if (result == XtGeometryNo)
                    geoReply.request_mode = 0;
                CALLGEOTAT(_XtGeoTrace(w, "calling SetValuesAlmost.\n"));
                (*set_values_almost) (oldw, w, &geoReq, &geoReply);
            } while (geoReq.request_mode != 0);
            /* call resize proc if we changed size and parent
             * didn't already invoke resize */
            {
                XtWidgetProc resize;

                LOCK_PROCESS;
                resize = wc->core_class.resize;
                UNLOCK_PROCESS;
                if ((w->core.width != oldw->core.width ||
                     w->core.height != oldw->core.height)
                    && result != XtGeometryDone
                    && resize != (XtWidgetProc) NULL) {
                    CALLGEOTAT(_XtGeoTrace(w,
                                           "XtSetValues calls \"%s\"'s resize proc.\n",
                                           XtName(w)));
                    (*resize) (w);
                }
            }
            CALLGEOTAT(_XtGeoTab(-1));
        }
        /* Redisplay if needed.  No point in clearing if the window is
         * about to disappear, as the Expose event will just go straight
         * to the bit bucket. */
        if (XtIsWidget(w)) {
            /* widgets can distinguish between redisplay and resize, since
               the server will cause an expose on resize */
            if (redisplay && XtIsRealized(w) && !w->core.being_destroyed) {
                CALLGEOTAT(_XtGeoTrace(w,
                                       "XtSetValues calls ClearArea on \"%s\".\n",
                                       XtName(w)));
                XClearArea(XtDisplay(w), XtWindow(w), 0, 0, 0, 0, TRUE);
            }
        }
        else {                  /*non-window object */
            if (redisplay && !cleared_rect_obj) {
                Widget pw = _XtWindowedAncestor(w);

                if (XtIsRealized(pw) && !pw->core.being_destroyed) {
                    RectObj r = (RectObj) w;
                    int bw2 = r->rectangle.border_width << 1;

                    CALLGEOTAT(_XtGeoTrace(w,
                                           "XtSetValues calls ClearArea on \"%s\"'s parent \"%s\".\n",
                                           XtName(w), XtName(pw)));
                    XClearArea(XtDisplay(pw), XtWindow(pw),
                               r->rectangle.x, r->rectangle.y,
                               (unsigned) (r->rectangle.width + bw2),
                               (unsigned) (r->rectangle.height + bw2), TRUE);
                }
            }
        }
    }

    /* Free dynamic storage */
    if (constraintSize) {
        XtStackFree(oldw->core.constraints, oldcCache);
        XtStackFree(reqw->core.constraints, reqcCache);
    }
    XtStackFree((XtPointer) oldw, oldwCache);
    XtStackFree((XtPointer) reqw, reqwCache);
    UNLOCK_APP(app);
}                               /* XtSetValues */