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|
%name-prefix "LayYY"
%defines
%{
#include <X11/Xlib.h>
#include <X11/Xresource.h>
#include <stdio.h>
#include <X11/IntrinsicP.h>
#include <X11/cursorfont.h>
#include <X11/StringDefs.h>
#include <X11/Xmu/Misc.h>
#include <X11/Xmu/Converters.h>
#include <X11/Xaw3d/LayoutP.h>
#define yysetdest LayYYsetdest
#define yywrap LayYYwrap
static LayoutPtr *dest;
%}
%union {
int ival;
XrmQuark qval;
BoxPtr bval;
BoxParamsPtr pval;
GlueRec gval;
LayoutDirection lval;
ExprPtr eval;
Operator oval;
}
%type <bval> box boxes compositebox
%type <pval> bothparams oneparams
%type <gval> glue opStretch opShrink
%type <lval> orientation
%type <eval> signedExpr simpleExpr expr
%token OC CC OA CA OP CP
%token <qval> NAME
%token <ival> NUMBER
%token <ival> INFINITY
%token VERTICAL HORIZONTAL
%token EQUAL DOLLAR
%left <oval> PLUS MINUS
%left <oval> TIMES DIVIDE PERCENTOF
%right <oval> PERCENT
%nonassoc WIDTH HEIGHT
%right <oval> UMINUS UPLUS
%%
layout : compositebox
{ *dest = $1; }
;
box : NAME bothparams
{
BoxPtr box = New(LBoxRec);
box->nextSibling = 0;
box->type = WidgetBox;
box->params = *$2;
Dispose ($2);
box->u.widget.quark = $1;
$$ = box;
}
| signedExpr oneparams
{
BoxPtr box = New(LBoxRec);
box->nextSibling = 0;
box->type = GlueBox;
box->params = *$2;
Dispose ($2);
box->u.glue.expr = $1;
$$ = box;
}
| NAME EQUAL signedExpr
{
BoxPtr box = New(LBoxRec);
box->nextSibling = 0;
box->type = VariableBox;
box->u.variable.quark = $1;
box->u.variable.expr = $3;
$$ = box;
}
| compositebox
{
$$ = $1;
}
;
compositebox : orientation OC boxes CC
{
BoxPtr box = New(LBoxRec);
BoxPtr child;
box->nextSibling = 0;
box->parent = 0;
box->type = BoxBox;
box->u.box.dir = $1;
box->u.box.firstChild = $3;
for (child = $3; child; child = child->nextSibling)
{
if (child->type == GlueBox)
{
child->params.stretch[!$1].expr = 0;
child->params.shrink[!$1].expr = 0;
child->params.stretch[!$1].order = 100000;
child->params.shrink[!$1].order = 100000;
child->params.stretch[!$1].value = 1;
child->params.shrink[!$1].value = 1;
}
child->parent = box;
}
$$ = box;
}
;
boxes : box boxes
{
$1->nextSibling = $2;
$$ = $1;
}
| box
{ $$ = $1; }
;
bothparams : OA opStretch opShrink TIMES opStretch opShrink CA
{
BoxParamsPtr p = New(BoxParamsRec);
p->stretch[LayoutHorizontal] = $2;
p->shrink[LayoutHorizontal] = $3;
p->stretch[LayoutVertical] = $5;
p->shrink[LayoutVertical] = $6;
$$ = p;
}
|
{
BoxParamsPtr p = New(BoxParamsRec);
ZeroGlue (p->stretch[LayoutHorizontal]);
ZeroGlue (p->shrink[LayoutHorizontal]);
ZeroGlue (p->stretch[LayoutVertical]);
ZeroGlue (p->shrink[LayoutVertical]);
$$ = p;
}
;
oneparams : OA opStretch opShrink CA
{
BoxParamsPtr p = New(BoxParamsRec);
p->stretch[LayoutHorizontal] = $2;
p->shrink[LayoutHorizontal] = $3;
p->stretch[LayoutVertical] = $2;
p->shrink[LayoutVertical] = $3;
$$ = p;
}
|
{
BoxParamsPtr p = New(BoxParamsRec);
ZeroGlue (p->stretch[LayoutHorizontal]);
ZeroGlue (p->shrink[LayoutHorizontal]);
ZeroGlue (p->stretch[LayoutVertical]);
ZeroGlue (p->shrink[LayoutVertical]);
$$ = p;
}
;
opStretch : PLUS glue
{ $$ = $2; }
|
{ ZeroGlue ($$); }
;
opShrink : MINUS glue
{ $$ = $2; }
|
{ ZeroGlue ($$); }
;
glue : simpleExpr INFINITY
{ $$.order = $2; $$.expr = $1; }
| simpleExpr
{ $$.order = 0; $$.expr = $1; }
| INFINITY
{ $$.order = $1; $$.expr = 0; $$.value = 1; }
;
signedExpr : MINUS simpleExpr %prec UMINUS
{
$$ = New(ExprRec);
$$->type = Unary;
$$->u.unary.op = $1;
$$->u.unary.down = $2;
}
| PLUS simpleExpr %prec UPLUS
{ $$ = $2; }
| simpleExpr
;
simpleExpr : WIDTH NAME
{ $$ = New(ExprRec);
$$->type = Width;
$$->u.width = $2;
}
| HEIGHT NAME
{ $$ = New(ExprRec);
$$->type = Height;
$$->u.height = $2;
}
| OP expr CP
{ $$ = $2; }
| simpleExpr PERCENT
{
$$ = New(ExprRec);
$$->type = Unary;
$$->u.unary.op = $2;
$$->u.unary.down = $1;
}
| NUMBER
{ $$ = New(ExprRec);
$$->type = Constant;
$$->u.constant = $1;
}
| DOLLAR NAME
{ $$ = New(ExprRec);
$$->type = Variable;
$$->u.variable = $2;
}
;
expr : expr PLUS expr
{ binary: ;
$$ = New(ExprRec);
$$->type = Binary;
$$->u.binary.op = $2;
$$->u.binary.left = $1;
$$->u.binary.right = $3;
}
| expr MINUS expr
{ goto binary; }
| expr TIMES expr
{ goto binary; }
| expr DIVIDE expr
{ goto binary; }
| expr PERCENTOF expr
{ goto binary; }
| MINUS expr %prec UMINUS
{ unary: ;
$$ = New(ExprRec);
$$->type = Unary;
$$->u.unary.op = $1;
$$->u.unary.down = $2;
}
| PLUS expr %prec UPLUS
{ $$ = $2; }
| simpleExpr
;
orientation : VERTICAL
{ $$ = LayoutVertical; }
| HORIZONTAL
{ $$ = LayoutHorizontal; }
;
%%
int yywrap (void)
{
return 1;
}
void yysetdest (LayoutPtr *c)
{
dest = c;
}
|
