Added libXaw

1 files changed, 1110 insertions, 0 deletions

diff --git a/libXaw/src/Form.c b/libXaw/src/Form.c
new file mode 100644
index 000000000..1d162407b
--- /dev/null
+++ b/libXaw/src/Form.c
@@ -0,0 +1,1110 @@
+/* $Xorg: Form.c,v 1.4 2001/02/09 02:03:43 xorgcvs Exp $ */
+
+/***********************************************************
+
+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.
+
+
+Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+
+/* $XFree86: xc/lib/Xaw/Form.c,v 1.20 2001/02/05 22:38:04 paulo Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <X11/IntrinsicP.h>
+#include <X11/StringDefs.h>
+#include <X11/Xmu/CharSet.h>
+#include <X11/Xmu/Converters.h>
+#include <X11/Xaw/FormP.h>
+#include <X11/Xaw/XawInit.h>
+#include "Private.h"
+
+/*
+ * Class Methods
+ */
+static void XawFormChangeManaged(Widget);
+static void XawFormClassInitialize(void);
+static void XawFormClassPartInitialize(WidgetClass);
+static void XawFormConstraintInitialize(Widget, Widget, ArgList, Cardinal*);
+static Boolean XawFormConstraintSetValues(Widget, Widget, Widget,
+					  ArgList, Cardinal*);
+static XtGeometryResult XawFormGeometryManager(Widget, XtWidgetGeometry*,
+					       XtWidgetGeometry*);
+static void XawFormInitialize(Widget, Widget, ArgList, Cardinal*);
+#ifndef OLDXAW
+static void XawFormRealize(Widget, Mask*, XSetWindowAttributes*);
+static void XawFormRedisplay(Widget, XEvent*, Region);
+#endif
+static XtGeometryResult XawFormQueryGeometry(Widget, XtWidgetGeometry*,
+					     XtWidgetGeometry*);
+static void XawFormResize(Widget);
+static Boolean XawFormSetValues(Widget, Widget, Widget,	ArgList, Cardinal*);
+static Boolean Layout(FormWidget, unsigned int, unsigned int, Bool);
+
+/*
+ * Prototypes
+ */
+static void _CvtStringToEdgeType(XrmValuePtr, Cardinal*,
+				 XrmValuePtr, XrmValuePtr);
+static Bool ChangeFormGeometry(Widget, Bool, unsigned int, unsigned int,
+			       Dimension*, Dimension*);
+Boolean CvtEdgeTypeToString(Display*, XrmValuePtr, Cardinal*,
+			    XrmValuePtr, XrmValuePtr, XtPointer*);
+static void LayoutChild(Widget);
+static int TransformCoord(int, unsigned int, unsigned int, XtEdgeType);
+static void ResizeChildren(Widget);
+
+/*
+ * Initialization
+ */
+#ifndef OLDXAW
+static XtActionsRec actions[] = {
+  {"set-values", XawSetValuesAction},
+  {"get-values", XawGetValuesAction},
+  {"declare",    XawDeclareAction},
+  {"call-proc",  XawCallProcAction},
+};
+#endif
+
+static XrmQuark	QchainLeft, QchainRight, QchainTop, QchainBottom, Qrubber;
+
+#define default_value	-99999
+#define Offset(field) XtOffsetOf(FormRec, form.field)
+static XtResource resources[] = {
+  {
+    XtNdefaultDistance,
+    XtCThickness,
+    XtRInt,
+    sizeof(int),
+    Offset(default_spacing),
+    XtRImmediate,
+    (XtPointer)4
+  },
+#ifndef OLDXAW
+  {
+    XawNdisplayList,
+    XawCDisplayList,
+    XawRDisplayList,
+    sizeof(XawDisplayList*),
+    Offset(display_list),
+    XtRImmediate,
+    NULL
+  },
+#endif
+};
+#undef Offset
+
+#define defEdge		XtRubber
+
+#define Offset(field) XtOffsetOf(FormConstraintsRec, form.field)
+static XtResource formConstraintResources[] = {
+  {
+    XtNtop,
+    XtCEdge,
+    XtREdgeType,
+    sizeof(XtEdgeType),
+    Offset(top),
+    XtRImmediate,
+    (XtPointer)defEdge
+  },
+  {
+    XtNbottom,
+    XtCEdge,
+    XtREdgeType,
+    sizeof(XtEdgeType),
+    Offset(bottom),
+    XtRImmediate,
+    (XtPointer)defEdge
+  },
+  {
+    XtNleft,
+    XtCEdge,
+    XtREdgeType,
+    sizeof(XtEdgeType),
+    Offset(left),
+    XtRImmediate,
+    (XtPointer)defEdge
+  },
+  {
+    XtNright,
+    XtCEdge,
+    XtREdgeType,
+    sizeof(XtEdgeType),
+    Offset(right),
+    XtRImmediate,
+    (XtPointer)defEdge
+  },
+  {
+    XtNhorizDistance,
+    XtCThickness,
+    XtRInt,
+    sizeof(int),
+    Offset(dx),
+    XtRImmediate,
+    (XtPointer)default_value
+  },
+  {
+    XtNfromHoriz,
+    XtCWidget,
+    XtRWidget,
+    sizeof(Widget),
+    Offset(horiz_base),
+    XtRWidget,
+    NULL
+  },
+  {
+    XtNvertDistance,
+    XtCThickness,
+    XtRInt,
+    sizeof(int),
+    Offset(dy),
+    XtRImmediate,
+    (XtPointer)default_value
+  },
+  {
+    XtNfromVert,
+    XtCWidget,
+    XtRWidget,
+    sizeof(Widget),
+    Offset(vert_base),
+    XtRWidget,
+    NULL
+  },
+  {
+    XtNresizable,
+    XtCBoolean,
+    XtRBoolean,
+    sizeof(Boolean),
+    Offset(allow_resize),
+    XtRImmediate,
+    (XtPointer)False
+  },
+};
+#undef Offset
+
+FormClassRec formClassRec = {
+  /* core */
+  {
+    (WidgetClass)&constraintClassRec,	/* superclass */
+    "Form",				/* class_name */
+    sizeof(FormRec),			/* widget_size */
+    XawFormClassInitialize,		/* class_initialize */
+    XawFormClassPartInitialize,		/* class_part_init */
+    False,				/* class_inited */
+    XawFormInitialize,			/* initialize */
+    NULL,				/* initialize_hook */
+#ifndef OLDXAW
+    XawFormRealize,			/* realize */
+    actions,				/* actions */
+    XtNumber(actions),			/* num_actions */
+#else
+    XtInheritRealize,			/* realize */
+    NULL,				/* actions */
+    0,					/* num_actions */
+#endif
+    resources,				/* resources */
+    XtNumber(resources),		/* num_resources */
+    NULLQUARK,				/* xrm_class */
+    True,				/* compress_motion */
+    True,				/* compress_exposure */
+    True,				/* compress_enterleave */
+    False,				/* visible_interest */
+    NULL,				/* destroy */
+    XawFormResize,			/* resize */
+#ifndef OLDXAW
+    XawFormRedisplay,			/* expose */
+#else
+    XtInheritExpose,			/* expose */
+#endif
+    XawFormSetValues,			/* set_values */
+    NULL,				/* set_values_hook */
+    XtInheritSetValuesAlmost,		/* set_values_almost */
+    NULL,				/* get_values_hook */
+    NULL,				/* accept_focus */
+    XtVersion,				/* version */
+    NULL,				/* callback_private */
+    NULL,				/* tm_table */
+    XawFormQueryGeometry,		/* query_geometry */
+    XtInheritDisplayAccelerator,	/* display_accelerator */
+    NULL,				/* extension */
+  },
+  /* composite */
+  {
+    XawFormGeometryManager,		/* geometry_manager */
+    XawFormChangeManaged,		/* change_managed */
+    XtInheritInsertChild,		/* insert_child */
+    XtInheritDeleteChild,		/* delete_child */
+    NULL,				/* extension */
+  },
+  /* constraint */
+  {
+    formConstraintResources,		/* subresourses */
+    XtNumber(formConstraintResources),	/* subresource_count */
+    sizeof(FormConstraintsRec),		/* constraint_size */
+    XawFormConstraintInitialize,	/* initialize */
+    NULL,				/* destroy */
+    XawFormConstraintSetValues,		/* set_values */
+    NULL,				/* extension */
+  },
+  /* form */
+  {
+    Layout,				/* layout */
+  },
+};
+
+WidgetClass formWidgetClass = (WidgetClass)&formClassRec;
+
+/*
+ * Implementation
+ */
+#ifndef OLDXAW
+static void
+XawFormRealize(Widget w, Mask *mask, XSetWindowAttributes *attr)
+{
+    XawPixmap *pixmap;
+
+    (*formWidgetClass->core_class.superclass->core_class.realize)(w, mask, attr);
+
+    if (w->core.background_pixmap > XtUnspecifiedPixmap) {
+	pixmap = XawPixmapFromXPixmap(w->core.background_pixmap, XtScreen(w),
+				      w->core.colormap, w->core.depth);
+	if (pixmap && pixmap->mask)
+	    XawReshapeWidget(w, pixmap);
+    }
+}
+
+static void
+XawFormRedisplay(Widget w, XEvent *event, Region region)
+{
+    FormWidget xaw = (FormWidget)w;
+
+    if (xaw->form.display_list)
+	XawRunDisplayList(w, xaw->form.display_list, event, region);
+}
+#endif
+
+/*ARGSUSED*/
+static void
+_CvtStringToEdgeType(XrmValuePtr args, Cardinal *num_args,
+		     XrmValuePtr fromVal, XrmValuePtr toVal)
+{
+    static XtEdgeType edgeType;
+    XrmQuark q;
+    char name[12];
+
+    XmuNCopyISOLatin1Lowered(name, (char*)fromVal->addr, sizeof(name));
+    q = XrmStringToQuark(name);
+
+    if (q == QchainLeft)
+	edgeType = XtChainLeft;
+    else if (q == QchainRight)
+	edgeType = XtChainRight;
+    else if (q == QchainTop)
+	edgeType = XtChainTop;
+    else if (q == QchainBottom)
+	edgeType = XtChainBottom;
+    else if (q == Qrubber)
+	edgeType = XtRubber;
+    else {
+	XtStringConversionWarning(fromVal->addr, XtREdgeType);
+	toVal->size = 0;
+	toVal->addr = NULL;
+	return;
+    }
+
+    toVal->size = sizeof(XtEdgeType);
+    toVal->addr = (XPointer)&edgeType;
+}
+
+/*ARGSUSED*/
+Boolean
+CvtEdgeTypeToString(Display *dpy, XrmValuePtr args, Cardinal *num_args,
+		    XrmValuePtr fromVal, XrmValuePtr toVal, XtPointer *data)
+{
+    static String buffer;
+    Cardinal size;
+
+    switch (*(XtEdgeType *)fromVal->addr) {
+	case XtChainLeft:
+	    buffer = XtEchainLeft;
+	    break;
+	case XtChainRight:
+	    buffer = XtEchainRight;
+	    break;
+	case XtChainTop:
+	    buffer = XtEchainTop;
+	    break;
+	case XtChainBottom:
+	    buffer = XtEchainBottom;
+	    break;
+	case XtRubber:
+	    buffer = XtErubber;
+	    break;
+	default:
+	    XawTypeToStringWarning(dpy, XtREdgeType);
+	    toVal->addr = NULL;
+	    toVal->size = 0;
+	    return (False);
+    }
+
+    size = strlen(buffer) + 1;
+    if (toVal->addr != NULL) {
+	if (toVal->size < size)	{
+	    toVal->size = size;
+	    return (False);
+	}
+	strcpy((char *)toVal->addr, buffer);
+    }
+    else
+	toVal->addr = (XPointer)buffer;
+    toVal->size = sizeof(String);
+
+    return (True);
+}
+
+static void
+XawFormClassInitialize(void)
+{
+    static XtConvertArgRec parentCvtArgs[] = {
+	{XtBaseOffset, (XtPointer)XtOffsetOf(WidgetRec, core.parent),
+	 sizeof(Widget)}
+    };
+
+    char name[12];
+
+    XawInitializeWidgetSet();
+    XmuNCopyISOLatin1Lowered(name, XtEchainLeft, sizeof(name));
+    QchainLeft = XrmStringToQuark(name);
+    XmuNCopyISOLatin1Lowered(name, XtEchainRight, sizeof(name));
+    QchainRight = XrmStringToQuark(name);
+    XmuNCopyISOLatin1Lowered(name, XtEchainTop, sizeof(name));
+    QchainTop = XrmStringToQuark(name);
+    XmuNCopyISOLatin1Lowered(name, XtEchainBottom, sizeof(name));
+    QchainBottom = XrmStringToQuark(name);
+    XmuNCopyISOLatin1Lowered(name, XtErubber, sizeof(name));
+    Qrubber = XrmStringToQuark(name);
+
+    XtAddConverter(XtRString, XtREdgeType, _CvtStringToEdgeType, NULL, 0);
+    XtSetTypeConverter(XtREdgeType, XtRString, CvtEdgeTypeToString,
+		       NULL, 0, XtCacheNone, NULL);
+    XtSetTypeConverter(XtRString, XtRWidget, XmuNewCvtStringToWidget,
+		       parentCvtArgs, XtNumber(parentCvtArgs), XtCacheNone,
+		       NULL);
+    XtSetTypeConverter(XtRWidget, XtRString, XmuCvtWidgetToString,
+		       NULL, 0, XtCacheNone, NULL);
+}
+
+static void
+XawFormClassPartInitialize(WidgetClass cclass)
+{
+    FormWidgetClass c = (FormWidgetClass)cclass;
+    FormWidgetClass super = (FormWidgetClass)c->core_class.superclass;
+
+    if (c->form_class.layout == XtInheritLayout)
+	c->form_class.layout = super->form_class.layout;
+}
+
+/*ARGSUSED*/
+static void
+XawFormInitialize(Widget request, Widget cnew,
+		  ArgList args, Cardinal *num_args)
+{
+    FormWidget fw = (FormWidget)cnew;
+
+    fw->form.old_width = fw->form.old_height = 0;
+    fw->form.no_refigure = False;
+    fw->form.needs_relayout = False;
+    fw->form.resize_in_layout = True;
+    fw->form.resize_is_no_op = False;
+}
+
+/*
+ * Function:
+ *	ChangeFormGeometry
+ *
+ * Parameters:
+ *	w	   - Form widget
+ *	query_only - is only a query?
+ *	width	   - new width and height
+ *	height	   - ""
+ *	ret_width  - actual size the form is allowed to resize to (return)
+ *	ret_height - ""
+ *
+ * Description:
+ *	Ask the parent to change the form widget's geometry.
+ *
+ * Returns:
+ *	True of children may always be resized
+ */
+static Bool
+ChangeFormGeometry(Widget w, Bool query_only,
+		   unsigned int width, unsigned int height,
+		   Dimension *ret_width, Dimension *ret_height)
+{
+    FormWidget fw = (FormWidget)w;
+    Boolean always_resize_children;
+    XtGeometryResult result;
+    XtWidgetGeometry request, return_request;
+
+    /*
+     * If we are already at the desired size then there is no need
+     * to ask our parent of we can change size
+     */
+    if (width == XtWidth(fw) && height == XtHeight(fw))
+	return (True);
+
+    request.width = width;
+    request.height = height;
+    request.request_mode = CWWidth | CWHeight;
+    if (query_only)
+	request.request_mode |= XtCWQueryOnly;
+
+    /*
+     * Do no invoke the resize rules if our size changes here
+     */
+    fw->form.resize_is_no_op = True;
+
+    result = XtMakeGeometryRequest(w, &request, &return_request);
+    if (result == XtGeometryAlmost) {
+	request = return_request;
+	(void)XtMakeGeometryRequest(w, &request, &return_request);
+	always_resize_children = False;
+    }
+    else
+	always_resize_children = result == XtGeometryYes;
+
+    fw->form.resize_is_no_op = False;
+
+    if (ret_width != NULL)
+	*ret_width = request.width;
+    if (ret_height != NULL)
+	*ret_height = request.height;
+
+    return (always_resize_children);
+}
+
+/*
+ * Function:
+ *	Layout
+ *
+ * Parameters:
+ *	fw	       - Form widget
+ *	width	       - unused
+ *	height	       - ""
+ *	force_relayout - will force the children to be moved, even if some
+ *			 go past the edge of the form
+ *
+ * Description:
+ *	Moves all the children around.
+ *
+ * Returns:
+ *	  True if the children are allowed to move from their
+ *	  current locations to the new ones.
+ */
+/*ARGSUSED*/
+static Boolean
+Layout(FormWidget fw, unsigned int width, unsigned int height,
+       Bool force_relayout)
+{
+    int num_children = fw->composite.num_children;
+    WidgetList children = fw->composite.children;
+    Widget *childP;
+    Dimension maxx, maxy;
+    Boolean ret_val;
+
+    for (childP = children; childP - children < num_children; childP++) {
+	FormConstraints form = (FormConstraints)(*childP)->core.constraints;
+	form->form.layout_state = LayoutPending;
+    }
+
+    maxx = maxy = 1;
+    for (childP = children; childP - children < num_children; childP++) {
+	if (XtIsManaged(*childP)) {
+	    FormConstraints form;
+	    Position x, y;
+
+	    form = (FormConstraints)(*childP)->core.constraints;
+
+	    LayoutChild(*childP);
+
+	    x = form->form.new_x + XtWidth(*childP)
+		+ (XtBorderWidth(*childP) << 1);
+	    if (x > (int)maxx)
+		maxx = x;
+
+	    y = form->form.new_y + XtHeight(*childP)
+		+ (XtBorderWidth(*childP) << 1);
+	    if (y > (int)maxy)
+		maxy = y;
+	}
+    }
+
+    fw->form.preferred_width = (maxx += fw->form.default_spacing);
+    fw->form.preferred_height = (maxy += fw->form.default_spacing);
+
+    if (fw->form.resize_in_layout) {
+	Boolean always_resize_children;
+
+	always_resize_children =
+	    ChangeFormGeometry((Widget)fw, False, maxx, maxy, NULL, NULL);
+
+#ifdef OLDXAW
+	fw->form.old_width  = fw->core.width;
+	fw->form.old_height = fw->core.height;
+#endif
+
+	if (force_relayout)
+	    ret_val = True;
+	else
+	    ret_val = always_resize_children ||
+			(XtWidth(fw) >= maxx && XtHeight(fw) >= maxy);
+
+	if (ret_val)
+	    ResizeChildren((Widget)fw);
+    }
+    else
+	ret_val = False;
+
+    fw->form.needs_relayout = False;
+
+    return (ret_val);
+}
+
+/*
+ * Function:
+ *	ResizeChildren
+ *
+ * Parameters:
+ *	w - form widget
+ *
+ * Description:
+ *	Resizes all children to new_x and new_y.
+ */
+static void
+ResizeChildren(Widget w)
+{
+    FormWidget fw = (FormWidget)w;
+    int num_children = fw->composite.num_children;
+    WidgetList children = fw->composite.children;
+    Widget *childP;
+
+    for (childP = children; childP - children < num_children; childP++) {
+	FormConstraints form;
+	Position x, y;
+
+	if (!XtIsManaged(*childP))
+	    continue;
+
+	form = (FormConstraints)(*childP)->core.constraints;
+
+	if (fw->form.old_width && fw->form.old_height) {
+	    x = TransformCoord(form->form.new_x, fw->form.old_width,
+			       XtWidth(fw), form->form.left);
+	    y = TransformCoord(form->form.new_y, fw->form.old_height,
+			       XtHeight(fw), form->form.top);
+	}
+	else {
+	    x = form->form.new_x;
+	    y = form->form.new_y;
+	}
+
+	if (fw->form.no_refigure) {
+	   /*
+	    * I am changing the widget wrapper w/o modifing the window.  This is
+	    * risky, but I can get away with it since I am the parent of this
+	    * widget, and he must ask me for any geometry changes
+	    *
+	    * The window will be updated when no_refigure is set back to False
+	    */
+	    XtX(*childP) = x;
+	    XtY(*childP) = y;
+	}
+	else
+	    XtMoveWidget(*childP, x, y);
+    }
+}
+
+static void
+LayoutChild(Widget w)
+{
+    FormConstraints form = (FormConstraints)w->core.constraints;
+    Widget ref;
+
+    switch (form->form.layout_state) {
+	case LayoutPending:
+	    form->form.layout_state = LayoutInProgress;
+	    break;
+	case LayoutDone:
+	    return;
+	case LayoutInProgress: {
+	    String subs[2];
+	    Cardinal num_subs = 2;
+	    subs[0] = w->core.name;
+	    subs[1] = w->core.parent->core.name;
+
+	    XtAppWarningMsg(XtWidgetToApplicationContext(w),
+			    "constraintLoop", "xawFormLayout", "XawToolkitError",
+			    "constraint loop detected while laying out "
+			    "child '%s' in FormWidget '%s'",
+			    subs, &num_subs);
+	}   return;
+    }
+
+    form->form.new_x = form->form.dx;
+    form->form.new_y = form->form.dy;
+    if ((ref = form->form.horiz_base) != NULL) {
+	FormConstraints ref_form = (FormConstraints)ref->core.constraints;
+
+	LayoutChild(ref);
+	form->form.new_x += ref_form->form.new_x + XtWidth(ref) +
+			    (XtBorderWidth(ref) << 1);
+    }
+    if ((ref = form->form.vert_base) != NULL) {
+	FormConstraints ref_form = (FormConstraints)ref->core.constraints;
+
+	LayoutChild(ref);
+	form->form.new_y += ref_form->form.new_y + XtHeight(ref) +
+			    (XtBorderWidth(ref) << 1);
+    }
+
+    form->form.layout_state = LayoutDone;
+}
+
+static int
+TransformCoord(int loc, unsigned int old, unsigned int cnew, XtEdgeType type)
+{
+    if (type == XtRubber) {
+	if ((int)old > 0)
+	    loc = (int)(loc * ((double)cnew / (double)old));
+    }
+    else if (type == XtChainBottom || type == XtChainRight)
+	loc += (int)cnew - (int)old;
+
+    return (loc);
+}
+
+static void
+XawFormResize(Widget w)
+{
+    FormWidget fw = (FormWidget)w;
+    WidgetList children = fw->composite.children;
+    int num_children = fw->composite.num_children;
+    Widget *childP;
+    int x, y;
+    int width, height;
+    Boolean unmap = XtIsRealized(w) && w->core.mapped_when_managed &&
+		    XtIsManaged(w);
+
+    if (unmap)
+	XtUnmapWidget(w);
+
+    if (!fw->form.resize_is_no_op)
+	for (childP = children; childP - children < num_children; childP++) {
+	    FormConstraints form = (FormConstraints)(*childP)->core.constraints;
+
+	    if (!XtIsManaged(*childP))
+		continue;
+
+#ifndef OLDXAW
+	    x = TransformCoord(form->form.virtual_x, fw->form.old_width,
+			      XtWidth(fw), form->form.left);
+	    y = TransformCoord(form->form.virtual_y, fw->form.old_height,
+			       XtHeight(fw), form->form.top);
+	    width = TransformCoord(form->form.virtual_x +
+				   form->form.virtual_width +
+				   (XtBorderWidth(*childP) << 1),
+				   fw->form.old_width, XtWidth(fw),
+				   form->form.right) -
+				   (x + (XtBorderWidth(*childP) << 1));
+	    height = TransformCoord(form->form.virtual_y +
+				    form->form.virtual_height +
+				    (XtBorderWidth(*childP) << 1),
+				    fw->form.old_height, XtHeight(fw),
+				    form->form.bottom) -
+				    (y + (XtBorderWidth(*childP) << 1));
+#else
+	    x = TransformCoord(XtX(*childP), fw->form.old_width,
+			      XtWidth(fw), form->form.left);
+	    y = TransformCoord(XtY(*childP), fw->form.old_height,
+			       XtHeight(fw), form->form.top);
+	    width = TransformCoord(XtX(*childP) + form->form.virtual_width +
+				   (XtBorderWidth(*childP) << 1),
+				   fw->form.old_width, XtWidth(fw),
+				   form->form.right) -
+				   (x + (XtBorderWidth(*childP) << 1));
+	    height = TransformCoord(XtY(*childP) + form->form.virtual_height +
+				    (XtBorderWidth(*childP) << 1),
+				    fw->form.old_height, XtHeight(fw),
+				    form->form.bottom) -
+				    (y + (XtBorderWidth(*childP) << 1));
+	    form->form.virtual_width = width;
+	    form->form.virtual_height = height;
+#endif
+
+	    width = width < 1 ? 1 : width;
+	    height = height < 1 ? 1 : height;
+
+	    XtConfigureWidget(*childP, x, y, width, height,
+			      XtBorderWidth(*childP));
+	}
+
+    if (unmap)
+	XtMapWidget(w);
+
+#ifdef OLDXAW
+    fw->form.old_width = XtWidth(fw);
+    fw->form.old_height = XtHeight(fw);
+#endif
+}
+
+/*ARGSUSED*/
+static XtGeometryResult
+XawFormGeometryManager(Widget w, XtWidgetGeometry *request,
+		       XtWidgetGeometry *reply)
+{
+    Dimension old_width, old_height;
+    FormWidget fw = (FormWidget)XtParent(w);
+    FormConstraints form = (FormConstraints)w->core.constraints;
+    XtWidgetGeometry allowed;
+    XtGeometryResult ret_val;
+
+    if ((request->request_mode & (unsigned)~(XtCWQueryOnly | CWWidth | CWHeight))
+	|| !form->form.allow_resize) {
+	/* If GeometryManager is invoked during a SetValues call on a child
+	 * then it is necessary to compute a new layout if ConstraintSetValues
+	 * allowed any constraint changes
+	 */
+	if (fw->form.needs_relayout)
+	    (*((FormWidgetClass)fw->core.widget_class)->form_class.layout)
+		(fw, 0, 0, True);
+	return (XtGeometryNo);
+    }
+
+    if (request->request_mode & CWWidth)
+	allowed.width = request->width;
+    else
+	allowed.width = XtWidth(w);
+
+    if (request->request_mode & CWHeight)
+	allowed.height = request->height;
+    else
+	allowed.height = XtHeight(w);
+
+    if (allowed.width == XtWidth(w) && allowed.height == XtHeight(w)) {
+	/* If GeometryManager is invoked during a SetValues call on a child
+	 * then it is necessary to compute a new layout if ConstraintSetValues
+	 * allowed any constraint changes
+	 */
+	if (fw->form.needs_relayout)
+	    (*((FormWidgetClass)fw->core.widget_class)->form_class.layout)
+		(fw, 0, 0, True);
+	return (XtGeometryNo);
+    }
+
+    /*
+     * Remember the old size, and then set the size to the requested size
+     */
+    old_width = XtWidth(w);
+    old_height = XtHeight(w);
+    XtWidth(w) = allowed.width;
+    XtHeight(w) = allowed.height;
+
+    if (request->request_mode & XtCWQueryOnly) {
+	Boolean always_resize_children;
+	Dimension ret_width, ret_height;
+
+	fw->form.resize_in_layout = False;
+
+	(*((FormWidgetClass)fw->core.widget_class)->form_class.layout)
+	    (fw, XtWidth(w), XtHeight(w), False);
+
+	/*
+	 * Reset the size of this child back to what it used to be
+	 */
+	XtWidth(w) = old_width;
+	XtHeight(w) = old_height;
+
+	fw->form.resize_in_layout = True;
+
+	always_resize_children = ChangeFormGeometry(w, True,
+				   fw->form.preferred_width,
+				   fw->form.preferred_height,
+				   &ret_width, &ret_height);
+
+	if (always_resize_children
+	    || (ret_width >= fw->form.preferred_width
+		&& ret_height >= fw->form.preferred_height))
+	    ret_val = XtGeometryYes;
+	else
+	    ret_val = XtGeometryNo;
+    }
+    else {
+	if ((*((FormWidgetClass)fw->core.widget_class)->form_class.layout)
+		(fw, XtWidth(w), XtHeight(w), False)) {
+	    Widget *childP;
+	    int num_children = fw->composite.num_children;
+	    WidgetList children = fw->composite.children;
+
+	    if (fw->form.no_refigure) {
+		/*
+		 * I am changing the widget wrapper w/o modifing the window.
+		 * This is risky, but I can get away with it since I am the
+		 * parent of this widget, and he must ask me for any geometry
+		 * changes
+		 *
+		 * The window will be updated when no_refigure is set back
+		 * to False
+		 */
+		form->form.deferred_resize = True;
+		ret_val = XtGeometryDone;
+	    }
+	    else
+		ret_val = XtGeometryYes;
+
+	    /*
+	     * Resets everything.
+	     */
+	    fw->form.old_width = XtWidth(fw);
+	    fw->form.old_height = XtHeight(fw);
+	    for (childP = children; childP - children < num_children; childP++) {
+		Widget nw = *childP;
+
+		if (XtIsManaged(nw)) {
+		    FormConstraints nform = (FormConstraints)nw->core.constraints;
+
+#ifndef OLDXAW
+		    nform->form.virtual_x = XtX(nw);
+		    nform->form.virtual_y = XtY(nw);
+#endif
+		    nform->form.virtual_width = XtWidth(nw);
+		    nform->form.virtual_height = XtHeight(nw);
+		}
+	    }
+	}
+	else {
+	    XtWidth(w) = old_width;
+	    XtHeight(w) = old_height;
+	    ret_val = XtGeometryNo;
+	}
+    }
+
+    return (ret_val);
+}
+
+/*ARGSUSED*/
+static Boolean
+XawFormSetValues(Widget current, Widget request, Widget cnew,
+		 ArgList args, Cardinal *num_args)
+{
+#ifndef OLDXAW
+    FormWidget f_old = (FormWidget)current;
+    FormWidget f_new = (FormWidget)cnew;
+
+    if (f_old->core.background_pixmap != f_new->core.background_pixmap) {
+	XawPixmap *opix, *npix;
+
+	opix = XawPixmapFromXPixmap(f_old->core.background_pixmap, XtScreen(f_old),
+				    f_old->core.colormap, f_old->core.depth);
+	npix = XawPixmapFromXPixmap(f_new->core.background_pixmap, XtScreen(f_new),
+				    f_new->core.colormap, f_new->core.depth);
+	if ((npix && npix->mask) || (opix && opix->mask))
+	    XawReshapeWidget(cnew, npix);
+    }
+#endif /* OLDXAW */
+
+    return (False);
+}
+
+/* ARGSUSED */
+static void
+XawFormConstraintInitialize(Widget request, Widget cnew,
+			    ArgList args, Cardinal *num_args)
+{
+    FormConstraints form = (FormConstraints)cnew->core.constraints;
+    FormWidget fw = (FormWidget)cnew->core.parent;
+
+#ifndef OLDXAW
+    form->form.virtual_x = XtX(cnew);
+    form->form.virtual_y = XtY(cnew);
+#endif
+    form->form.virtual_width = XtWidth(cnew);
+    form->form.virtual_height = XtHeight(cnew);
+
+    if (form->form.dx == default_value)
+	form->form.dx = fw->form.default_spacing;
+
+    if (form->form.dy == default_value)
+	form->form.dy = fw->form.default_spacing;
+
+    form->form.deferred_resize = False;
+}
+
+/*ARGSUSED*/
+static Boolean
+XawFormConstraintSetValues(Widget current, Widget request, Widget cnew,
+			   ArgList args, Cardinal *num_args)
+{
+    FormConstraints cfc = (FormConstraints)current->core.constraints;
+    FormConstraints nfc = (FormConstraints)cnew->core.constraints;
+
+    if (cfc->form.top != nfc->form.top || cfc->form.bottom != nfc->form.bottom
+	|| cfc->form.left != nfc->form.left || cfc->form.right != nfc->form.right
+	|| cfc->form.dx != nfc->form.dx || cfc->form.dy != nfc->form.dy
+	|| cfc->form.horiz_base != nfc->form.horiz_base
+	|| cfc->form.vert_base != nfc->form.vert_base) {
+	FormWidget fp = (FormWidget)XtParent(cnew);
+
+	/* If there are no subclass ConstraintSetValues procedures remaining
+	 * to be invoked, and if there is no geometry request about to be
+	 * made, then invoke the new layout now; else defer it
+	 */
+	if (XtClass(XtParent(cnew)) == formWidgetClass
+	    && XtX(current) == XtX(cnew)
+	    && XtY(current) == XtY(cnew)
+	    && XtWidth(current) == XtWidth(cnew)
+	    && XtHeight(current) == XtHeight(cnew)
+	    && XtBorderWidth(current) == XtBorderWidth(cnew))
+	    Layout(fp, 0, 0, True);
+	else
+	    fp->form.needs_relayout = True;
+    }
+
+    return (False);
+}
+
+static void
+XawFormChangeManaged(Widget w)
+{
+    FormWidget fw = (FormWidget)w;
+    FormConstraints form;
+    WidgetList children, childP;
+    int num_children = fw->composite.num_children;
+    Widget child;
+
+    (*((FormWidgetClass)w->core.widget_class)->form_class.layout)
+	(fw, XtWidth(w), XtHeight(w), True);
+
+    fw->form.old_width = XtWidth(w);
+    fw->form.old_height = XtHeight(w);
+    for (children = childP = fw->composite.children;
+	 childP - children < num_children;
+	 childP++) {
+	child = *childP;
+	if (!XtIsManaged(child))
+	    continue;
+	form = (FormConstraints)child->core.constraints;
+#ifndef OLDXAW
+	form->form.virtual_x = XtX(child);
+	form->form.virtual_y = XtY(child);
+#endif
+	form->form.virtual_width = XtWidth(child);
+	form->form.virtual_height = XtHeight(child);
+    }
+}
+
+static XtGeometryResult
+XawFormQueryGeometry(Widget widget, XtWidgetGeometry *request,
+		     XtWidgetGeometry *reply)
+{
+    FormWidget w = (FormWidget)widget;
+
+    reply->width = w->form.preferred_width;
+    reply->height = w->form.preferred_height;
+    reply->request_mode = CWWidth | CWHeight;
+
+    if ((request->request_mode & (CWWidth | CWHeight)) == (CWWidth | CWHeight)
+	&& request->width == reply->width
+	&& request->height == reply->height)
+	return (XtGeometryYes);
+    else if (reply->width == XtWidth(w) && reply->height == XtHeight(w))
+	return (XtGeometryNo);
+
+    return (XtGeometryAlmost);
+}
+
+/*
+ * Public routines
+ */
+/*
+ * Set or reset figuring (ignored if not realized)
+ */
+void
+XawFormDoLayout(Widget w,
+#if NeedWidePrototypes
+		Bool force
+#else
+		Boolean force
+#endif
+)
+{
+    Widget *childP;
+    FormWidget fw = (FormWidget)w;
+    int num_children = fw->composite.num_children;
+    WidgetList children = fw->composite.children;
+
+    if ((fw->form.no_refigure = !force) == True || !XtIsRealized(w))
+	return;
+
+    for (childP = children; childP - children < num_children; childP++) {
+	Widget nw = *childP;
+
+	if (XtIsManaged(nw)) {
+	    FormConstraints form = (FormConstraints)nw->core.constraints;
+
+	    /*
+	     * Xt Configure widget is too smart, and optimizes out
+	     * my changes
+	     */
+	    XMoveResizeWindow(XtDisplay(nw), XtWindow(nw),
+			      XtX(nw), XtY(nw), XtWidth(nw), XtHeight(nw));
+
+	    if (form)
+	      if (form->form.deferred_resize &&
+		XtClass(nw)->core_class.resize != NULL) {
+		(*(XtClass(nw)->core_class.resize))(nw);
+		form->form.deferred_resize = False;
+	      }
+	}
+    }
+}