/*@z20.c:Galley Flushing:DebugInnersNames()@**********************************/
/* */
/* THE LOUT DOCUMENT FORMATTING SYSTEM (VERSION 3.18) */
/* COPYRIGHT (C) 1991, 2000 Jeffrey H. Kingston */
/* */
/* Jeffrey H. Kingston (jeff@cs.usyd.edu.au) */
/* Basser Department of Computer Science */
/* The University of Sydney 2006 */
/* AUSTRALIA */
/* */
/* This program is free software; you can redistribute it and/or modify */
/* it under the terms of the GNU General Public License as published by */
/* the Free Software Foundation; either Version 2, or (at your option) */
/* any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public License */
/* along with this program; if not, write to the Free Software */
/* Foundation, Inc., 59 Temple Place, Suite 330, Boston MA 02111-1307 USA */
/* */
/* FILE: z20.c */
/* MODULE: Galley Flushing */
/* EXTERNS: FlushGalley() */
/* */
/*****************************************************************************/
#include "externs.h"
#if DEBUG_ON
FULL_CHAR *DebugInnersNames(OBJECT inners)
{ static FULL_CHAR buff[MAX_BUFF];
OBJECT link, y, z;
StringCopy(buff, STR_EMPTY);
if( inners != nilobj )
{ for( link = Down(inners); link != inners; link = NextDown(link) )
{ Child(y, link);
if( link != Down(inners) ) StringCat(buff, STR_SPACE);
switch( type(y) )
{
case RECEIVING:
case UNATTACHED:
assert( Down(y) != y, "DebugInnersNames: UNATTACHED!");
Child(z, Down(y));
StringCat(buff, SymName(actual(z)));
break;
case PRECEDES:
case GALL_PREC:
case DEAD:
StringCat(buff, Image(type(y)));
break;
default:
assert1(FALSE, "DebugInnersNames:", Image(type(y)));
break;
}
}
}
return buff;
} /* end DebugInnersNames */
#endif
/*@::ParentFlush(), FlushGalley()@********************************************/
/* */
/* ParentFlush(prnt_flush, dest_index, kill) */
/* */
/* Flush the galley which is the parent of dest_index, if likely to flush. */
/* If kill is TRUE, delete dest_index. */
/* */
/*****************************************************************************/
static void ParentFlush(BOOLEAN prnt_flush, OBJECT dest_index, BOOLEAN kill)
{ OBJECT prnt;
debug3(DGF, D, "ParentFlush(%s, %s, %s)",
bool(prnt_flush), EchoIndex(dest_index), bool(kill));
if( prnt_flush )
{ Parent(prnt, Up(dest_index));
if( kill ) DeleteNode(dest_index);
debug0(DGF, D, " calling FlushGalley from ParentFlush");
FlushGalley(prnt);
}
else if( kill ) DeleteNode(dest_index)
debug0(DGF, D, "ParentFlush returning.");
} /* end ParentFlush */
/*****************************************************************************/
/* */
/* FlushGalley(hd) */
/* */
/* Flush galley hd as far as possible. It could be the root galley. */
/* */
/*****************************************************************************/
void FlushGalley(OBJECT hd)
{ OBJECT dest; /* the target galley hd empties into */
OBJECT dest_index; /* the index of dest */
OBJECT inners; /* list of galleys and PRECEDES to flush */
OBJECT link, y; /* for scanning through the components of hd */
int dim; /* direction of galley */
CONSTRAINT dest_par_constr; /* the parallel size constraint on dest */
CONSTRAINT dest_perp_constr; /* the perpendicular size constraint on dest */
int pb, pf, f; /* candidate replacement sizes for dest */
OBJECT dest_encl; /* the VCAT or ACAT enclosing dest, if any */
int dest_side; /* if dest_encl != nilobj, side dest is on */
BOOLEAN need_adjust; /* TRUE as soon as dest_encl needs adjusting */
FULL_LENGTH dest_back, dest_fwd; /* the current size of dest_encl or dest */
FULL_LENGTH frame_size; /* the total constraint of dest_encl */
OBJECT prec_gap; /* the gap preceding dest if any else nilobj */
OBJECT prec_def; /* the component preceding dest, if any */
OBJECT succ_gap; /* the gap following dest if any else nilobj */
OBJECT succ_def; /* the component following dest, if any */
OBJECT stop_link; /* most recently seen gap link of hd */
FULL_LENGTH stop_back; /* back(dest_encl) incl all before stop_link */
FULL_LENGTH stop_fwd; /* fwd(dest_encl) incl. all before stop_link */
FULL_LENGTH stop_perp_back; /* back(dest_encl) in other direction */
FULL_LENGTH stop_perp_fwd; /* fwd(dest_encl) in other direction */
BOOLEAN prnt_flush; /* TRUE when the parent of hd needs a flush */
BOOLEAN target_is_internal; /* TRUE if flushing into an internal target */
OBJECT zlink, z, tmp, prnt; int attach_status; BOOLEAN remove_target;
OBJECT why;
FULL_LENGTH perp_back, perp_fwd; /* current perp size of dest_encl */
debug1(DGF, D, "[ FlushGalley %s (hd)", SymName(actual(hd)));
prnt_flush = FALSE;
dim = gall_dir(hd);
RESUME:
assert( type(hd) == HEAD, "FlushGalley: type(hd) != HEAD!" );
debug1(DGF, D, " resuming FlushGalley %s, hd =", SymName(actual(hd)));
ifdebugcond(DGF, D, actual(hd) == nilobj, DebugGalley(hd, nilobj, 4));
assert( Up(hd) != hd, "FlushGalley: resume found no parent to hd!" );
/*@@************************************************************************/
/* */
/* The first step is to examine the parent of galley hd to determine the */
/* status of the galley. If this is not suitable for flushing, we do */
/* what we can to change the status. If still no good, return; so if */
/* this code does not return, then the galley is ready to flush into a */
/* destination in the normal way, and the following variables are set: */
/* */
/* dest_index the parent of the galley and index of its destination */
/* dest the destination of the galley, a @Galley object */
/* */
/***************************************************************************/
Parent(dest_index, Up(hd));
switch( type(dest_index) )
{
case DEAD:
/* the galley has been killed off while this process was sleeping */
debug1(DGF, D, "] FlushGalley %s returning (DEAD)", SymName(actual(hd)));
return;
case UNATTACHED:
/* the galley is currently not attached to a destination */
attach_status = AttachGalley(hd, &inners, &y);
debug1(DGF, D, " ex-AttachGalley inners: %s", DebugInnersNames(inners));
Parent(dest_index, Up(hd));
switch( attach_status )
{
case ATTACH_KILLED:
assert(inners==nilobj, "FlushGalley/ATTACH_KILLED: inners!=nilobj!");
debug1(DGF, D, "] FlushGalley %s returning (ATTACH_KILLED)",
SymName(actual(hd)));
debug1(DGF, D, " prnt_flush = %s", bool(prnt_flush));
return;
case ATTACH_INPUT:
ParentFlush(prnt_flush, dest_index, FALSE);
assert(inners==nilobj, "FlushGalley/ATTACH_INPUT: inners!=nilobj!");
debug1(DGF, D, "] FlushGalley %s returning (ATTACH_INPUT)",
SymName(actual(hd)));
return;
case ATTACH_NOTARGET:
ParentFlush(prnt_flush, dest_index, FALSE);
assert(inners==nilobj, "FlushGalley/ATTACH_NOTARG: inners!=nilobj!");
debug1(DGF, D, "] FlushGalley %s returning (ATTACH_NOTARGET)",
SymName(actual(hd)));
return;
case ATTACH_SUSPEND:
/* AttachGalley only returns inners here if they really need to */
/* be flushed; in particular the galley must be unsized before */
if( inners != nilobj )
{
debug0(DGF, D, " calling FlushInners() from FlushGalley (a)");
FlushInners(inners, nilobj);
goto RESUME;
}
stop_link = nilobj;
goto SUSPEND; /* nb y will be set by AttachGalley in this case */
case ATTACH_NULL:
/* hd will have been linked to the unexpanded target in this case */
remove_target = (actual(actual(dest_index)) == whereto(hd));
if( force_gall(hd) )
{
/* if hd is a forcing galley, close all predecessors */
debug3(DGA, D, " forcing ATTACH_NULL case for %s into %s (%s)",
SymName(actual(hd)), SymName(whereto(hd)),
remove_target ? "remove_target" : "not remove_target");
Parent(prnt, Up(dest_index));
if( !non_blocking(dest_index) && remove_target )
{
/* ***
prnt_flush = TRUE;
*** */
prnt_flush = non_blocking(dest_index) = TRUE;
}
FreeGalley(prnt, Up(dest_index), &inners, Up(dest_index),
whereto(hd));
}
else
{
debug3(DGA, D, " non-force ATTACH_NULL case for %s into %s (%s)",
SymName(actual(hd)), SymName(whereto(hd)),
remove_target ? "remove_target" : "not remove_target");
if( blocked(dest_index) && remove_target ) prnt_flush = TRUE;
}
DetachGalley(hd);
KillGalley(hd, TRUE);
if( inners != nilobj )
{
debug0(DGF, D, " calling FlushInners() from FlushGalley (b)");
FlushInners(inners, nilobj);
}
else ParentFlush(prnt_flush, dest_index, remove_target);
debug0(DGF, D, "] FlushGalley returning ATTACH_NULL");
return;
case ATTACH_ACCEPT:
/* if hd is a forcing galley, or actual(dest_index) is */
/* @ForceGalley, then close all predecessors */
if( force_gall(hd) || actual(actual(dest_index)) == ForceGalleySym )
{ Parent(prnt, Up(dest_index));
debug1(DGA, D, " forcing ATTACH_ACCEPT case for %s",
SymName(actual(hd)));
/* debug0(DGA, DD, " force: prnt ="); */
/* ifdebug(DGA, DD, DebugObject(prnt)); */
/* debug1(DGA, D," calling FreeGalley from FlushGalley(%s)", */
/* SymName(actual(hd))); */
if( !non_blocking(dest_index) ) prnt_flush = TRUE; /* bug fix */
FreeGalley(prnt, Up(dest_index), &inners, Up(dest_index),
whereto(hd));
/* debug0(DGA, DD, " force: after FreeGalley, prnt ="); */
/* ifdebug(DGA, DD, DebugObject(prnt)); */
}
else prnt_flush = prnt_flush || blocked(dest_index);
debug1(DGF, D, " force: prnt_flush = %s", bool(prnt_flush));
if( inners != nilobj )
{
debug0(DGF, D, " calling FlushInners() from FlushGalley (c)");
FlushInners(inners, nilobj);
}
goto RESUME;
default:
assert(FALSE, "FlushGalley: attach_status");
break;
}
break;
case RECEIVING:
if( actual(actual(dest_index)) == InputSym )
{ ParentFlush(prnt_flush, dest_index, FALSE);
debug1(DGF, D, "] FlushGalley %s retn, input", SymName(actual(hd)));
return;
}
break;
default:
assert1(FALSE, "FlushGalley: dest_index", Image(type(dest_index)));
break;
}
dest = actual(dest_index);
if( underline(dest) == UNDER_UNDEF ) underline(dest) = UNDER_OFF;
target_is_internal =
(dim==ROWM && !external_ver(dest)) || (dim==COLM && !external_hor(dest));
debug1(DGF, DD, " dest_index: %s", EchoObject(dest_index));
/*@@************************************************************************/
/* */
/* The second step is to examine the components of the galley one by one */
/* to determine if they can be promoted. Each component has the format */
/* */
/* { <index> } <object> */
/* */
/* and is always followed by a gap object (except the last component). */
/* An index indicates that the following object has some interesting */
/* feature, and it points to that feature inside the object. There are */
/* two possible actions for each component, in addition to accepting it: */
/* */
/* REJECT: The component does not fit, so detach the galley */
/* SUSPEND: The component is incomplete; go to sleep and wait */
/* */
/***************************************************************************/
stop_link = dest_encl = inners = nilobj;
need_adjust = FALSE;
/***************************************************************************/
/* */
/* Loop invariant */
/* */
/* The children of hd up to but not including Child(link) have been */
/* examined and pronounced to be promotable, if unbreakable gaps are */
/* ignored. When unbreakable gaps are taken into account, the most */
/* recent gap where a break is possible is at Child(stop_link), or */
/* nowhere if stop_link == nilobj. */
/* */
/* Case 1: target_is_internal == FALSE */
/* */
/* If this flag is FALSE, it means that the target of this galley is */
/* external. Consequently, there is no need to calculate sizes because */
/* there is no constraint on them. Also, a REJECT action is impossible */
/* so unbreakable gaps are no impediment. Variable dest_encl is nilobj. */
/* */
/* Case 2: target_is_internal == TRUE */
/* */
/* If this flag is TRUE, it means that the target of this galley is */
/* internal. Consequently, sizes need to be calculated, and unbreakable */
/* gaps need to be taken into account. Variable dest_encl may be not */
/* nilobj, in which case the following variables are defined: */
/* */
/* dest_encl the object enclosing dest (which must exist) */
/* prec_gap gap object preceding dest (which must exist) */
/* prec_def first definite object preceding dest (must exist) */
/* dest_back back(dest_encl) including effect of accepted compts */
/* dest_fwd fwd(dest_encl) including effect of accepted compts */
/* dest_side BACK or FWD, i.e. which side of the mark dest is on */
/* dest_par_constr the parallel size constraint on dest */
/* dest_perp_constr the perpendicular size constraint on dest */
/* frame_size size of frame enclosing dest_encl */
/* perp_back back(dest_encl) in other direction, incl accepteds */
/* perp_fwd fwd(dest_encl) in other direction, incl accepteds */
/* */
/* if dest_encl is nilobj, these variables are not defined. */
/* */
/* If stop_link is non-nilobj, then in the internal case dest_encl must */
/* be non-nilobj, and the following variables are defined: */
/* */
/* stop_back back(dest_encl) including all before stop_link */
/* stop_fwd fwd(dest_encl) including all before stop_link */
/* stop_perp_back back(dest_encl) in other direction */
/* stop_perp_fwd fwd(dest_encl) in other direction */
/* */
/* need_adjust is true if at least one definite component has been */
/* accepted for promotion and the destination is internal; hence, */
/* dest_encl is defined and its size needs to be adjusted. */
/* */
/* inners is the set of all PRECEDES and UNATTACHED indexes found. */
/* */
/***************************************************************************/
for( link = Down(hd); link != hd; link = NextDown(link) )
{
Child(y, link);
if( type(y) == SPLIT ) Child(y, DownDim(y, dim));
debug2(DGF, DD, " examining %s %s", Image(type(y)), EchoObject(y));
switch( type(y) )
{
case GAP_OBJ:
underline(y) = underline(dest);
prec_gap = y;
if( target_is_internal )
{ assert( dest_encl != nilobj, "FlushGalley/GAP_OBJ: dest_encl!" );
if( !nobreak(gap(prec_gap)) )
{
stop_link = link;
stop_back = dest_back;
stop_fwd = dest_fwd;
stop_perp_back = perp_back;
stop_perp_fwd = perp_fwd;
}
}
else stop_link = link;
if( !join(gap(y)) ) seen_nojoin(hd) = TRUE;
break;
case SCALE_IND:
case COVER_IND:
case EXPAND_IND:
case GALL_PREC:
case GALL_FOLL:
case GALL_FOLL_OR_PREC:
case GALL_TARG:
case CROSS_PREC:
case CROSS_FOLL:
case CROSS_FOLL_OR_PREC:
case CROSS_TARG:
case PAGE_LABEL_IND:
underline(y) = underline(dest);
break;
case PRECEDES:
case UNATTACHED:
if( inners == nilobj ) New(inners, ACAT);
Link(inners, y);
break;
case RECEIVING:
case RECEPTIVE:
goto SUSPEND;
case FOLLOWS:
Child(tmp, Down(y));
if( Up(tmp) == LastUp(tmp) )
{ link = PrevDown(link);
DisposeChild(NextDown(link));
break;
}
Parent(tmp, Up(tmp));
assert(type(tmp) == PRECEDES, "Flush: PRECEDES!");
switch( CheckComponentOrder(tmp, dest_index) )
{
case CLEAR: DeleteNode(tmp);
link = PrevDown(link);
DisposeChild(NextDown(link));
break;
case PROMOTE: break;
case BLOCK: goto SUSPEND;
case CLOSE: if( opt_components(hd) != nilobj )
{ DisposeObject(opt_components(hd));
opt_components(hd) = nilobj;
debug2(DOG, D, "FlushGalley(%s) de-optimizing %s",
"(CLOSE problem)", SymName(actual(hd)));
}
debug1(DGF, D, " reject (a) %s", EchoObject(y));
goto REJECT;
}
break;
case NULL_CLOS:
case PAGE_LABEL:
case WORD:
case QWORD:
case ONE_COL:
case ONE_ROW:
case WIDE:
case HIGH:
case HSHIFT:
case VSHIFT:
case HSCALE:
case VSCALE:
case HCOVER:
case VCOVER:
case HCONTRACT:
case VCONTRACT:
case HLIMITED:
case VLIMITED:
case HEXPAND:
case VEXPAND:
case START_HVSPAN:
case START_HSPAN:
case START_VSPAN:
case HSPAN:
case VSPAN:
case ROTATE:
case BACKGROUND:
case SCALE:
case KERN_SHRINK:
case INCGRAPHIC:
case SINCGRAPHIC:
case PLAIN_GRAPHIC:
case GRAPHIC:
case ACAT:
case HCAT:
case VCAT:
case ROW_THR:
case CLOSURE:
case CROSS:
case FORCE_CROSS:
underline(y) = underline(dest);
if( dim == ROWM )
{
/* make sure y is not joined to a target below (vertical case only) */
for( zlink = NextDown(link); zlink != hd; zlink = NextDown(zlink) )
{ Child(z, zlink);
switch( type(z) )
{
case RECEPTIVE:
case RECEIVING: y = z;
goto SUSPEND;
case GAP_OBJ: if( !join(gap(z)) ) zlink = PrevDown(hd);
break;
default: break;
}
}
/* try vertical hyphenation before anything else */
if( type(y) == HCAT ) VerticalHyphenate(y);
}
/* check size constraint */
if( target_is_internal )
{
/* initialise dest_encl etc if not done yet */
if( dest_encl == nilobj )
{ assert( UpDim(dest,1-dim) == UpDim(dest,dim), "FlushG: UpDims!" );
/* *** weird old code, trying for UpDim(dest, ROWM)?
Parent(dest_encl, NextDown(Up(dest)));
*** */
Parent(dest_encl, Up(dest));
debug4(DGF, D, " flush dest = %s %s, dest_encl = %s %s",
Image(type(dest)), EchoObject(dest),
Image(type(dest_encl)), EchoObject(dest_encl));
assert( (dim==ROWM && type(dest_encl)==VCAT) ||
(dim==COLM && type(dest_encl)==ACAT),
"FlushGalley: dest != VCAT or ACAT!" );
SetNeighbours(Up(dest), FALSE, &prec_gap, &prec_def,
&succ_gap, &succ_def, &dest_side);
assert(prec_gap != nilobj || is_indefinite(type(y)),
"FlushGalley: prec_gap == nilobj && !is_indefinite(type(y))!" );
assert(succ_gap == nilobj, "FlushGalley: succ_gap != nilobj!" );
assert(dest_side == FWD || is_indefinite(type(y)),
"FlushGalley: dest_side != FWD || !is_indefinite(type(y))!");
dest_back = back(dest_encl, dim);
dest_fwd = fwd(dest_encl, dim);
perp_back = back(dest_encl, 1-dim);
perp_fwd = fwd(dest_encl, 1-dim);
Constrained(dest_encl, &dest_par_constr, dim, &why);
Constrained(dest_encl, &dest_perp_constr, 1-dim, &why);
debug1(DGF, D, " setting dest_perp_constr = %s",
EchoConstraint(&dest_perp_constr));
frame_size = constrained(dest_par_constr) ? bfc(dest_par_constr) :0;
}
if( !is_indefinite(type(y)) )
{
ifdebugcond(DGF, D, mode(gap(prec_gap)) == NO_MODE,
DebugGalley(hd, y, 4));
/* calculate parallel effect of adding y to dest */
f = dest_fwd + fwd(y, dim) - fwd(prec_def, dim) +
ActualGap(fwd(prec_def, dim), back(y, dim),
fwd(y, dim), &gap(prec_gap), frame_size,
dest_back + dest_fwd - fwd(prec_def, dim));
debug5(DGF, D, " f = %s + %s - %s + %s (prec_gap %s)",
EchoLength(dest_fwd), EchoLength(fwd(y, dim)),
EchoLength(fwd(prec_def, dim)), EchoLength(
ActualGap(fwd(prec_def, dim), back(y, dim),
fwd(y, dim), &gap(prec_gap), frame_size,
dest_back + dest_fwd - fwd(prec_def, dim))
), EchoGap(&gap(prec_gap)));
debug3(DGF, D, " b,f: %s,%s; dest_encl: %s",
EchoLength(dest_back), EchoLength(f),
EchoConstraint(&dest_par_constr));
/* check new size against parallel constraint */
if( (units(gap(prec_gap))==FRAME_UNIT && width(gap(prec_gap)) > FR)
|| !FitsConstraint(dest_back, f, dest_par_constr)
|| (opt_components(hd) != nilobj && opt_comps_permitted(hd)<=0)
)
{
if( opt_components(hd) != nilobj )
{ OBJECT z;
/* record the size of this just-completed target area for hd */
New(z, WIDE);
CopyConstraint(constraint(z), dest_par_constr);
Link(opt_constraints(hd), z);
ifdebug(DOG, D,
debug2(DOG, D, "FlushGalley(%s) adding constraint %s",
SymName(actual(hd)), EchoConstraint(&constraint(z)));
if( units(gap(prec_gap))==FRAME_UNIT &&
width(gap(prec_gap)) > FR )
{ debug1(DOG, D, " prec_gap = %s", EchoGap(&gap(prec_gap)));
}
if( !FitsConstraint(dest_back, f, dest_par_constr) )
{ debug3(DOG, D, " !FitsConstraint(%s, %s, %s)",
EchoLength(dest_back), EchoLength(f),
EchoConstraint(&dest_par_constr));
}
if( opt_comps_permitted(hd) <= 0 )
{ debug1(DOG, D, " opt_comps_permitted = %2d",
opt_comps_permitted(hd));
}
debug4(DOG, D, "prec_gap = %s; y = %s (%s,%s):",
EchoGap(&gap(prec_gap)), Image(type(y)),
EchoLength(back(y, dim)), EchoLength(fwd(y, dim)));
DebugObject(y);
)
/* refresh the number of components permitted into the next target */
if( opt_counts(hd) != nilobj && Down(opt_counts(hd)) != opt_counts(hd) )
{ Child(z, Down(opt_counts(hd)));
opt_comps_permitted(hd) += comp_count(z) - 1;
DisposeChild(Up(z));
}
else opt_comps_permitted(hd) = MAX_FILES; /* a large number */
debug1(DOG, D, " REJECT permitted = %2d", opt_comps_permitted(hd));
}
debug1(DGF, D, " reject (b) %s", EchoObject(y));
goto REJECT;
}
/* calculate perpendicular effect of adding y to dest */
if( seen_nojoin(hd) )
{
pb = 0;
pf = find_max(perp_fwd, size(y, 1-dim));
}
else
{
pb = find_max(perp_back, back(y, 1-dim));
pf = find_max(perp_fwd, fwd(y, 1-dim));
}
/* check new size against perpendicular constraint */
if( !FitsConstraint(pb, pf, dest_perp_constr) )
{
if( opt_components(hd) != nilobj )
{ DisposeObject(opt_components(hd));
opt_components(hd) = nilobj;
debug1(DOG, D, "FlushGalley(%s) de-optimizing (perp problem)",
SymName(actual(hd)));
}
if( dim == ROWM )
{
Error(20, 3, "component too wide for available space",
WARN, &fpos(y));
debug6(DGF, D, " %s,%s [%s,%s] too wide for %s, y = %s",
EchoLength(pb), EchoLength(pf),
EchoLength(back(y, 1-dim)), EchoLength(fwd(y, 1-dim)),
EchoConstraint(&dest_perp_constr), EchoObject(y));
}
debug1(DGF, D, " reject (c) %s", EchoObject(y));
goto REJECT;
}
/* accept definite component */
dest_fwd = f; prec_def = y;
perp_back = pb; perp_fwd = pf;
need_adjust = TRUE;
if( opt_components(hd) != nilobj )
{ opt_comps_permitted(hd)--;
debug1(DOG, D, " ACCEPT permitted = %2d", opt_comps_permitted(hd));
}
}
/* accept indefinite component */
} /* end if( target_is_internal ) */
/* accept this component into dest, subject to following nobreaks */
debug3(DGF, D, " t-accept %s %s %s", Image(type(y)), EchoObject(y),
EchoFilePos(&fpos(y)));
prnt_flush = prnt_flush || blocked(dest_index);
debug1(DGF, DDD, " prnt_flush = %s", bool(prnt_flush));
debug1(DGF, DDD, " inners = %s", DebugInnersNames(inners));
if( inners != nilobj )
{ BOOLEAN promotable; OBJECT tgp;
/* We would prefer to promote right now, then give these inners */
/* a chance. However this is not possible unless the following */
/* gap (if any) is breakable */
if( type(NextDown(link)) == LINK )
{ Child(tgp, NextDown(link));
assert( type(tgp) == GAP_OBJ, "FlushGalley: tgp!" );
promotable = !nobreak(gap(tgp));
}
else promotable = TRUE;
if( promotable )
{
Promote(hd, NextDown(link), dest_index, TRUE);
if( need_adjust )
{ debug0(DSA, D, " calling AdjustSize from FlushGalley (ACCEPT)");
AdjustSize(dest_encl, dest_back, dest_fwd, dim);
AdjustSize(dest_encl, perp_back, perp_fwd, 1-dim);
}
debug0(DGF, D, " calling FlushInners() from FlushGalley (d)");
FlushInners(inners, hd);
goto RESUME;
}
}
break;
default:
assert1(FALSE, "FlushGalley:", Image(type(y)));
break;
} /* end switch */
} /* end for */
/* EMPTY: */
/* galley is now completely accepted; clean up and exit */
debug0(DGF, D, " galley empty now");
if( inners != nilobj ) DisposeObject(inners);
if( Down(hd) != hd )
{ Promote(hd, hd, dest_index, TRUE);
if( need_adjust )
{ debug0(DSA, D, " calling AdjustSize from FlushGalley (EMPTY)");
AdjustSize(dest_encl, dest_back, dest_fwd, dim);
AdjustSize(dest_encl, perp_back, perp_fwd, 1-dim);
}
}
if( opt_components(hd) != nilobj )
{ OBJECT z;
New(z, WIDE);
if( dest_encl != nilobj )
CopyConstraint(constraint(z), dest_par_constr);
else
SetConstraint(constraint(z),
MAX_FULL_LENGTH, MAX_FULL_LENGTH, MAX_FULL_LENGTH);
Link(opt_constraints(hd), z);
debug2(DOG, D, "FlushGalley(%s) empty adding constraint %s",
SymName(actual(hd)), EchoConstraint(&constraint(z)));
}
DetachGalley(hd);
debug0(DGF, D, " calling KillGalley from FlushGalley");
KillGalley(hd, TRUE);
ParentFlush(prnt_flush, dest_index, TRUE);
debug1(DGF,D,"] FlushGalley %s returning (emptied).", SymName(actual(hd)));
return;
REJECT:
/* reject this component and move to a new dest */
assert(actual(dest) != PrintSym, "FlushGalley: reject print!");
if( inners != nilobj ) DisposeObject(inners);
if( stop_link != nilobj )
{ Promote(hd, stop_link, dest_index, TRUE);
if( need_adjust )
{ debug0(DSA, D, " calling AdjustSize from FlushGalley (REJECT)");
AdjustSize(dest_encl, stop_back, stop_fwd, dim);
AdjustSize(dest_encl, stop_perp_back, stop_perp_fwd, 1-dim);
}
}
DetachGalley(hd);
assert( type(dest_index) == RECEIVING, "FlushGalley/REJECT: dest_index!" );
prnt_flush = prnt_flush || blocked(dest_index);
DeleteNode(dest_index);
goto RESUME;
SUSPEND:
/* suspend this component */
debug1(DGF, D, " suspend %s", EchoIndex(y));
if( inners != nilobj ) DisposeObject(inners);
if( stop_link != nilobj )
{ Promote(hd, stop_link, dest_index, TRUE);
if( need_adjust )
{ debug0(DSA, D, " calling AdjustSize from FlushGalley (SUSPEND)");
AdjustSize(dest_encl, stop_back, stop_fwd, dim);
AdjustSize(dest_encl, stop_perp_back, stop_perp_fwd, 1-dim);
}
}
/* check whether external galleys can remove the blockage */
if( type(y) == RECEPTIVE && ready_galls(hd) != nilobj && AllowCrossDb )
{ OBJECT eg, val, index2, hd2, tag, seq, newsym;
BOOLEAN found, gall; FULL_CHAR newtag[MAX_BUFF], newseq[MAX_BUFF];
/* get first ready galley in from cross reference database */
Child(eg, Down(ready_galls(hd)));
SwitchScope(nilobj);
val = ReadFromFile(eg_fnum(eg), eg_fpos(eg), eg_lnum(eg));
UnSwitchScope(nilobj);
if( val == nilobj )
Error(20, 1, "error in database file %s",
FATAL, &fpos(y), FileName(eg_fnum(eg)));
assert( type(val) == CLOSURE, "AttachG: db CLOSURE!" );
New(index2, UNATTACHED);
pinpoint(index2) = nilobj;
New(hd2, HEAD);
FposCopy(fpos(hd2), fpos(val));
actual(hd2) = actual(val);
limiter(hd2) = nilobj;
opt_components(hd2) = opt_constraints(hd2) = nilobj;
gall_dir(hd2) = horiz_galley(actual(val));
sized(hd2) = FALSE;
ready_galls(hd2) = nilobj;
must_expand(hd2) = TRUE;
Link(index2, hd2);
Link(hd2, val);
SetTarget(hd2);
foll_or_prec(hd2) = GALL_FOLL;
enclose_obj(hd2) = (has_enclose(actual(hd2)) ? BuildEnclose(hd2) : nilobj);
Link(Up(y), index2);
/* set up the next ready galley for reading next time */
Child(tag, Down(eg)); Child(seq, LastDown(eg));
do /* skip duplicate seq values */
{ found = DbRetrieveNext(OldCrossDb, &gall, &newsym, newtag, newseq,
&eg_fnum(eg), &eg_fpos(eg), &eg_lnum(eg), &eg_cont(eg));
debug2(DGF, DD, " ext gall found: %15s gall: %15s",
bool(gall), bool(found));
debug2(DGF, DD, " ext gall new sym: %15s old sym: %15s",
SymName(newsym), SymName(eg_symbol(eg)));
debug2(DGF, DD, " ext gall new tag: %15s old tag: %15s",
newtag, string(tag));
debug2(DGF, DD, " ext gall new seq: %15s old seq: %15s",
newseq, string(seq));
if( found ) found = gall && newsym == eg_symbol(eg) &&
StringEqual(newtag, string(tag));
/* merge galleys whose seq strings are equal */
if( found && StringEqual(newseq, string(seq)) )
{
SwitchScope(nilobj);
val = ReadFromFile(eg_fnum(eg), eg_fpos(eg), eg_lnum(eg));
UnSwitchScope(nilobj);
if( val == nilobj )
Error(20, 2, "error in database file %s",
FATAL, &fpos(y), FileName(eg_fnum(eg)));
assert( type(val) == CLOSURE, "AttachG: db CLOSURE!" );
if( !has_merge(actual(val)) ) DisposeObject(val);
else /* add val to hd2 */
{ if( type(hd2) != ACAT )
{ OBJECT tmp = hd2;
New(hd2, ACAT);
MoveLink(Up(tmp), hd2, CHILD);
Link(hd2, tmp);
}
Link(hd2, val);
}
}
} while( found && StringEqual(newseq, string(seq)) );
if( found )
{ DisposeChild(Up(tag));
DisposeChild(Up(seq));
tag = MakeWord(WORD, newtag, no_fpos);
seq = MakeWord(WORD, newseq, no_fpos);
Link(eg, tag); Link(eg, seq);
debug1(DGF, DD, " another ext gall: into %s", SymName(newsym));
}
else
{ DisposeChild(Up(eg));
debug1(DGF, DD, " last ext gall into ", SymName(eg_symbol(eg)));
if( Down(ready_galls(hd)) == ready_galls(hd) )
{ Dispose(ready_galls(hd));
ready_galls(hd) = nilobj;
debug0(DGF, DD, " all ext galls exhausted");
}
}
/* flush the ready galley found above, and resume */
debug2(DGF, DD, " ext gall FlushGalley (%s into %s)",
SymName(actual(hd2)), SymName(whereto(hd2)));
debug0(DGF, DD, " calling FlushGalley from FlushGalley/SUSPEND");
if( type(hd2) == ACAT )
hd2 = ConvertGalleyList(hd2);
FlushGalley(hd2);
goto RESUME;
}
else if( type(y) == RECEPTIVE && trigger_externs(y) && AllowCrossDb )
{ OBJECT sym, cr, ins, tag, seq, eg, cnt; BOOLEAN found;
FULL_CHAR newseq[MAX_BUFF]; FILE_NUM tfnum; long tfpos, tcont;
int tlnum;
debug1(DGF, DD, " ext gall target %s", SymName(actual(actual(y))));
for( sym = FirstExternTarget(actual(actual(y)), &cnt);
sym != nilobj; sym = NextExternTarget(actual(actual(y)), &cnt) )
{
debug1(DGF, DD, " ext gall gall_targ %s", SymName(sym));
cr = GallTargEval(sym, &fpos(actual(y)));
New(ins, GALL_TARG);
actual(ins) = cr;
Link(Up(y), ins);
Child(tag, LastDown(cr));
assert( is_word(type(tag)), "FlushGalley: cr is_word(type(tag))!" );
found = DbRetrieve(OldCrossDb, TRUE, sym, string(tag),
newseq, &tfnum, &tfpos, &tlnum, &tcont);
if( found )
{ if( ready_galls(hd) == nilobj ) New(ready_galls(hd), ACAT);
New(eg, EXT_GALL);
debug1(DGF, DD, " ext gall retrieved: into %s", SymName(sym));
eg_fnum(eg) = tfnum;
eg_fpos(eg) = tfpos;
eg_lnum(eg) = tlnum;
eg_symbol(eg) = sym;
eg_cont(eg) = tcont;
tag = MakeWord(WORD, string(tag), no_fpos);
Link(eg, tag);
seq = MakeWord(WORD, newseq, no_fpos);
Link(eg, seq);
Link(ready_galls(hd), eg);
}
}
trigger_externs(y) = FALSE;
if( ready_galls(hd) != nilobj ) goto RESUME;
} /* end if external galleys */
/* if non-blocking, delete the index and resume */
if( type(y) == RECEPTIVE && non_blocking(y) )
{ DeleteNode(y);
goto RESUME;
}
else if( type(y) == RECEIVING && non_blocking(y) )
{
if( Down(y) == y )
{ DeleteNode(y);
}
else
{ Child(z, Down(y));
if( opt_components(z) != nilobj )
GazumpOptimize(z, actual(y));
DetachGalley(z);
}
goto RESUME;
}
/* if all the above fail to remove the blockage, suspend */
blocked(y) = TRUE;
ParentFlush(prnt_flush, dest_index, FALSE);
debug1(DGF,D, "] FlushGalley %s returning (suspend)", SymName(actual(hd)));
return;
} /* end FlushGalley */
