/*@z18.c:Galley Transfer:Declarations@****************************************/
/* */
/* THE LOUT DOCUMENT FORMATTING SYSTEM (VERSION 3.19) */
/* 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: z18.c */
/* MODULE: Galley Transfer */
/* EXTERNS: TransferInit(), TransferBegin(), TransferComponent(), */
/* TransferEnd(), TransferClose() */
/* */
/*****************************************************************************/
#include "externs.h"
#define MAX_DEPTH 30 /* max depth of galleys */
static OBJECT root_galley = nilobj; /* the root galley */
static OBJECT targets[MAX_DEPTH]; /* currently open \Inputs */
static CONSTRAINT constraints[MAX_DEPTH]; /* their COLM constraints */
static int itop; /* stack top */
static CONSTRAINT initial_constraint; /* initial COLM constraint */
STYLE InitialStyle; /* initial style */
OBJECT InitialEnvironment; /* initial environment */
#if DEBUG_ON
static void debug_targets(void)
{ int i; OBJECT tmp;
for( i = 0; i <= itop; i++ )
{ if( targets[i] == nilobj || Down(targets[i]) == targets[i] ) tmp = nilobj;
else Child(tmp, Down(targets[i]));
debug3(DGT, D, " target[%d] %s = %s", i,
EchoConstraint(&constraints[i]), EchoObject(tmp));
}
} /* end debug_targets */
#endif
/*@::TransferInit()@**********************************************************/
/* */
/* TransferInit(InitEnv) */
/* */
/* Initialise this module. The initial environment is InitEnv. */
/* */
/*****************************************************************************/
void TransferInit(OBJECT InitEnv)
{ OBJECT dest, x, y, recs, inners, nothing, dest_index, up_hd, why;
debug1(DGT, D, "[ TransferInit( %s )", EchoObject(InitEnv));
SetConstraint(initial_constraint,
MAX_FULL_LENGTH-1, MAX_FULL_LENGTH-1, MAX_FULL_LENGTH-1);
/* set initial environment and style */
InitialEnvironment = InitEnv;
SetGap(line_gap(InitialStyle), FALSE,FALSE,FALSE,FIXED_UNIT,MARK_MODE,18*PT);
vadjust(InitialStyle) = FALSE;
hadjust(InitialStyle) = FALSE;
padjust(InitialStyle) = FALSE;
space_style(InitialStyle) = SPACE_LOUT;
SetGap(space_gap(InitialStyle), FALSE,FALSE,TRUE,FIXED_UNIT,EDGE_MODE,1*EM);
hyph_style(InitialStyle) = HYPH_UNDEF;
fill_style(InitialStyle) = FILL_UNDEF;
display_style(InitialStyle) = DISPLAY_UNDEF;
small_caps(InitialStyle) = SMALL_CAPS_OFF;
font(InitialStyle) = 0; /* i.e. undefined */
colour(InitialStyle) = 0; /* i.e. undefined */
outline(InitialStyle) = FALSE; /* i.e. not outlined */
language(InitialStyle) = 0; /* i.e. undefined */
yunit(InitialStyle) = 0; /* i.e. zero */
zunit(InitialStyle) = 0; /* i.e. zero */
nobreakfirst(InitialStyle) = FALSE;
nobreaklast(InitialStyle) = FALSE;
/* construct destination for root galley */
New(up_hd, HEAD);
force_gall(up_hd) = FALSE;
actual(up_hd) = enclose_obj(up_hd) = headers(up_hd) = limiter(up_hd) = nilobj;
opt_components(up_hd) = opt_constraints(up_hd) = nilobj;
gall_dir(up_hd) = ROWM;
New(dest_index, RECEIVING);
New(dest, CLOSURE); actual(dest) = PrintSym;
actual(dest_index) = dest;
debug2(DGT, D, "TransferInit setting external_ver(%s %s) = TRUE",
Image(type(dest)), SymName(actual(dest)));
external_ver(dest) = TRUE;
external_hor(dest) = FALSE;
threaded(dest) = FALSE;
blocked(dest_index) = FALSE;
Link(up_hd, dest_index);
/* construct root galley */
New(root_galley, HEAD);
force_gall(root_galley) = FALSE;
enclose_obj(root_galley) = limiter(root_galley) = nilobj;
headers(root_galley) = nilobj;
opt_components(root_galley) = opt_constraints(root_galley) = nilobj;
gall_dir(root_galley) = ROWM;
FposCopy(fpos(root_galley), *no_fpos);
actual(root_galley) = whereto(root_galley) = nilobj;
ready_galls(root_galley) = nilobj;
must_expand(root_galley) = sized(root_galley) =FALSE;
foll_or_prec(root_galley) = GALL_FOLL;
New(x, CLOSURE); actual(x) = InputSym;
Link(root_galley, x);
SizeGalley(root_galley, InitEnv, TRUE, FALSE, FALSE, FALSE, &InitialStyle,
&initial_constraint, nilobj, ¬hing, &recs, &inners, nilobj);
assert( recs == nilobj , "TransferInit: recs != nilobj!" );
assert( inners == nilobj , "TransferInit: inners != nilobj!" );
Link(dest_index, root_galley);
/* initialise target and constraint stacks */
Child(y, Down(root_galley));
assert( type(y) == RECEPTIVE && type(actual(y)) == CLOSURE &&
actual(actual(y)) == InputSym, "TransferInit: initial galley!" );
assert( external_ver(actual(y)), "TransferInit: input sym not external!" );
blocked(y) = TRUE;
itop = 0;
New(targets[itop], ACAT);
Link(targets[itop], y);
Constrained(actual(y), &constraints[itop], COLM, &why);
debug2(DSC, DD, "Constrained( %s, COLM ) = %s",
EchoObject(y), EchoConstraint(&constraints[itop]));
debug0(DGT, D, "] TransferInit returning.");
ifdebug(DGT, DD, debug_targets());
} /* end TransferInit */
/*@::TransferBegin()@*********************************************************/
/* */
/* OBJECT TransferBegin(x) */
/* */
/* Commence the transfer of a new galley whose header is invocation x. */
/* */
/*****************************************************************************/
OBJECT TransferBegin(OBJECT x)
{ OBJECT xsym, index, y, link, env, new_env, hold_env, res, hd, target, why;
CONSTRAINT c;
debug1(DGT, D, "[ [ TransferBegin( %s )", EchoObject(x));
ifdebug(DGT, DD, debug_targets());
assert( type(x) == CLOSURE, "TransferBegin: non-CLOSURE!" );
/* add an automatically generated @Tag parameter to x if required */
if( has_tag(actual(x)) ) CrossAddTag(x);
/* construct new (inner) env chain */
if( Down(targets[itop]) == targets[itop] )
Error(18, 1, "cannot attach galley %s", FATAL,&fpos(x),SymName(actual(x)));
Child(target, Down(targets[itop]));
xsym = actual(x);
env = GetEnv(actual(target));
debug1(DGT, DD, " current env chain: %s", EchoObject(env));
if( has_body(xsym) )
{
/* prepare a copy of x for inclusion in environment */
y = CopyObject(x, no_fpos);
/* attach its environment */
AttachEnv(env, y);
/* now the new environment is y catenated with the old one */
debug0(DCR, DDD, "calling SetEnv from TransferBegin (a)");
new_env = SetEnv(y, nilobj);
}
else new_env = env;
New(hold_env, ACAT); Link(hold_env, new_env);
debug1(DGT, DD, " new env chain: %s", EchoObject(new_env));
/* convert x into an unsized galley called hd */
New(index, UNATTACHED);
pinpoint(index) = nilobj;
New(hd, HEAD);
FposCopy(fpos(hd), fpos(x));
actual(hd) = xsym;
limiter(hd) = opt_components(hd) = opt_constraints(hd) = nilobj;
gall_dir(hd) = ROWM;
ready_galls(hd) = nilobj;
must_expand(hd) = TRUE;
sized(hd) = FALSE;
Link(index, hd);
Link(hd, x);
AttachEnv(env, x);
SetTarget(hd);
enclose_obj(hd) = (has_enclose(actual(hd)) ? BuildEnclose(hd) : nilobj);
headers(hd) = nilobj;
/* search for destination for hd and release it */
Link(Up(target), index);
debug0(DGF,D, "");
debug1(DGF,D, " calling FlushGalley(%s) from TransferBegin, root_galley =",
SymName(actual(hd)));
ifdebug(DGF, D, DebugGalley(root_galley, nilobj, 4));
if( whereto(hd) == nilobj || !uses_extern_target(whereto(hd)) ) /* &&& */
FlushGalley(hd);
/* if failed to flush, undo everything and exit */
Parent(index, Up(hd));
if( type(index) == UNATTACHED && !sized(hd) )
{ DeleteNode(index);
DisposeObject(hold_env);
if( LastDown(x) != x )
{ Child(env, LastDown(x));
if( type(env) == ENV ) DisposeChild(LastDown(x));
}
debug1(DGT,D, "] TransferBegin returning failed, x: %s", EchoObject(x));
return x;
}
if( has_rpar(actual(hd)) )
{
/* set up new target to be inner \InputSym, or nilobj if none */
if( ++itop >= MAX_DEPTH )
Error(18, 2, "galley nested too deeply (max is %d)",
FATAL, &fpos(x), MAX_DEPTH);
New(targets[itop], ACAT); target = nilobj;
for( link = Down(hd); link != hd; link = NextDown(link) )
{ Child(y, link);
if( type(y) == RECEPTIVE && actual(actual(y)) == InputSym )
{
Constrained(actual(y), &constraints[itop], COLM, &why);
if( FitsConstraint(0, 0, constraints[itop]) )
{ Link(targets[itop], y); target = y;
debug2(DSC, DD, "Constrained( %s, COLM ) = %s",
EchoObject(y), EchoConstraint(&constraints[itop]));
env = DetachEnv(actual(y));
AttachEnv(new_env, actual(y));
}
else
{ Error(18, 3, "galley %s deleted (insufficient width at target)",
WARN, &fpos(hd), SymName(actual(hd)));
}
break;
}
}
/* return a token appropriate to the new target */
if( target == nilobj || external_ver(actual(target)) )
res = NewToken(GSTUB_EXT, no_fpos, 0, 0, precedence(xsym), nilobj);
else
{ Constrained(actual(target), &c, ROWM, &why);
if( constrained(c) )
Error(18, 4, "right parameter of %s is vertically constrained",
FATAL, &fpos(target), SymName(xsym));
else res = NewToken(GSTUB_INT, no_fpos, 0, 0, precedence(xsym), nilobj);
}
debug1(DGT, D, "] TransferBegin returning %s", Image(type(res)));
}
else
{
res = NewToken(GSTUB_NONE, no_fpos, 0, 0, precedence(xsym), nilobj);
debug1(DGT, D, "] TransferBegin returning %s", Image(type(res)));
}
DisposeObject(hold_env);
ifdebug(DGT, DD, debug_targets());
return res;
} /* end TransferBegin */
/*@::TransferComponent()@*****************************************************/
/* */
/* TransferComponent(x) */
/* */
/* Transfer component x of a galley. */
/* */
/*****************************************************************************/
void TransferComponent(OBJECT x)
{ OBJECT y, env, start_search, recs, inners, nothing, hd, dest, dest_index;
debug1(DGT, D, "[ TransferComponent( %s )", EchoObject(x));
ifdebug(DGT, DD, debug_targets());
/* if no dest_index, discard x and exit */
if( Down(targets[itop]) == targets[itop] )
{ DisposeObject(x);
debug0(DGT, D, "] TransferComponent returning (no target).");
return;
}
Child(dest_index, Down(targets[itop]));
assert( external_ver(actual(dest_index)), "TransferComponent: internal!" );
/* make the component into a galley */
New(hd, HEAD);
force_gall(hd) = FALSE;
enclose_obj(hd) = limiter(hd) = headers(hd) = nilobj;
opt_components(hd) = opt_constraints(hd) = nilobj;
gall_dir(hd) = ROWM;
FposCopy(fpos(hd), fpos(x));
actual(hd) = whereto(hd) = ready_galls(hd) = nilobj;
foll_or_prec(hd) = GALL_FOLL;
must_expand(hd) = sized(hd) = FALSE;
Link(hd, x);
dest = actual(dest_index);
env = GetEnv(dest);
debug1(DGT, DD, " current env chain: %s", EchoObject(env));
SizeGalley(hd, env, TRUE, threaded(dest), FALSE, TRUE, &save_style(dest),
&constraints[itop], nilobj, ¬hing, &recs, &inners, nilobj);
if( recs != nilobj ) ExpandRecursives(recs);
debug3(DSA, D, "after SizeGalley, hd width is (%s,%s), constraint was %s",
EchoLength(back(hd, COLM)), EchoLength(fwd(hd, COLM)),
EchoConstraint(&constraints[itop]));
/* promote the components, remembering where old spot was */
start_search = PrevDown(Up(dest_index));
debug1(DSA, D, " calling AdjustSize from TransferComponent %s",
EchoFilePos(&fpos(hd)));
ifdebug(DSA, D,
Child(y, Down(hd));
while( type(y) == VCAT ) Child(y, Down(y));
debug2(DSA, D, " first component is %s at %s",
Image(type(y)), EchoFilePos(&fpos(y)));
if( NextDown(Down(hd)) != hd && NextDown(NextDown(Down(hd))) != hd )
{ Child(y, NextDown(NextDown(Down(hd))));
debug2(DSA, D, " second component is %s at %s",
Image(type(y)), EchoFilePos(&fpos(y)));
}
);
AdjustSize(dest, back(hd, COLM), fwd(hd, COLM), COLM);
Promote(hd, hd, dest_index, FALSE);
DeleteNode(hd);
/* flush any widowed galleys attached to \Input */
if( Down(dest_index) != dest_index )
{ OBJECT tinners, index;
New(tinners, ACAT);
while( Down(dest_index) != dest_index )
{ Child(y, Down(dest_index));
assert( type(y) == HEAD, "TransferComponent: input child!" );
if( opt_components(y) != nilobj )
{ DisposeObject(opt_components(y));
opt_components(y) = nilobj;
debug1(DOG, D, "TransferComponent de-optimizing %s (@Input case)",
SymName(actual(y)));
}
DetachGalley(y);
Parent(index, Up(y));
MoveLink(Up(index), NextDown(start_search), PARENT);
Link(tinners, index);
}
debug0(DGF, D, " calling FlushInners() from TransferComponent (a)");
FlushInners(tinners, nilobj);
}
/* flush any galleys inside hd */
if( inners != nilobj )
{
debug0(DGF, D, " calling FlushInners() from TransferComponent (b)");
FlushInners(inners, nilobj);
}
/* flush parent galley, if needed */
if( blocked(dest_index) )
{ blocked(dest_index) = FALSE;
Parent(y, Up(dest_index));
debug0(DGF, D, " calling FlushGalley from TransferComponent");
FlushGalley(y);
}
debug0(DGT, D, "] TransferComponent returning.");
ifdebug(DGT, DD, debug_targets());
} /* end TransferComponent */
/*@::TransferEnd()@***********************************************************/
/* */
/* TransferEnd(x) */
/* */
/* End the transfer of a galley. */
/* */
/*****************************************************************************/
void TransferEnd(OBJECT x)
{ OBJECT recs, inners, nothing, z, env, dest, hd, dest_index, y, start_search;
debug1(DGT, D, "[ TransferEnd( %s )", EchoObject(x));
ifdebug(DGT, DD, debug_targets());
/* if no dest_index, discard x and exit */
if( Down(targets[itop]) == targets[itop] )
{ DisposeObject(x); DisposeObject(targets[itop--]);
debug0(DGT, D, "] TransferEnd returning: no dest_index");
return;
}
Child(dest_index, Down(targets[itop]));
/* make the component into a galley */
New(hd, HEAD); FposCopy(fpos(hd), fpos(x));
force_gall(hd) = FALSE;
enclose_obj(hd) = limiter(hd) = headers(hd) = nilobj;
opt_components(hd) = opt_constraints(hd) = nilobj;
gall_dir(hd) = ROWM;
actual(hd) = whereto(hd) = ready_galls(hd) = nilobj;
foll_or_prec(hd) = GALL_FOLL;
must_expand(hd) = sized(hd) = FALSE;
Link(hd, x); dest = actual(dest_index); env = GetEnv(dest);
debug1(DGT, DD, " current env chain: %s", EchoObject(env));
SizeGalley(hd, env, external_ver(dest), threaded(dest), FALSE, TRUE,
&save_style(dest), &constraints[itop], nilobj, ¬hing, &recs, &inners,
nilobj);
if( recs != nilobj ) ExpandRecursives(recs);
debug3(DSA, D, "after SizeGalley, hd width is (%s,%s), constraint was %s",
EchoLength(back(hd, COLM)), EchoLength(fwd(hd, COLM)),
EchoConstraint(&constraints[itop]));
/* promote the components, remembering where old spot was */
start_search = PrevDown(Up(dest_index));
debug0(DSA, D, "calling AdjustSize from TransferEnd (a)");
AdjustSize(dest, back(hd, COLM), fwd(hd, COLM), COLM);
if( !external_ver(dest) )
{ Child(z, LastDown(hd));
debug0(DSA, D, "calling AdjustSize from TransferEnd (b)");
AdjustSize(dest, back(z, ROWM), fwd(z, ROWM), ROWM);
Interpose(dest, VCAT, hd, z);
}
Promote(hd, hd, dest_index, TRUE); DeleteNode(hd);
/* flush any widowed galleys attached to \Input */
if( Down(dest_index) != dest_index )
{ OBJECT tinners, index;
New(tinners, ACAT);
while( Down(dest_index) != dest_index )
{ Child(y, Down(dest_index));
assert( type(y) == HEAD, "TransferEnd: input child!" );
if( opt_components(y) != nilobj )
{ DisposeObject(opt_components(y));
opt_components(y) = nilobj;
debug1(DOG, D, "TransferEnd de-optimizing %s (@Input case)",
SymName(actual(y)));
}
DetachGalley(y);
Parent(index, Up(y));
MoveLink(Up(index), NextDown(start_search), PARENT);
Link(tinners, index);
}
debug0(DGF, D, " calling FlushInners() from TransferEnd (a)");
FlushInners(tinners, nilobj);
}
/* flush any galleys inside hd */
if( inners != nilobj )
{
debug0(DGF, D, " calling FlushInners() from TransferEnd (b)");
FlushInners(inners, nilobj);
}
/* close dest_index, and flush parent galley if needed */
if( blocked(dest_index) )
{ Parent(y, Up(dest_index));
DeleteNode(dest_index);
debug0(DGF, D, " calling FlushGalley from TransferEnd");
FlushGalley(y);
}
else DeleteNode(dest_index);
/* pop target stack and exit */
DisposeObject(targets[itop--]);
debug0(DGT, D, "] ] TransferEnd returning.");
ifdebug(DGT, DD, debug_targets());
} /* end TransferEnd */
/*@::TransferClose()@*********************************************************/
/* */
/* TransferClose() */
/* */
/* Close this module. */
/* */
/*****************************************************************************/
void TransferClose(void)
{ OBJECT inners;
debug0(DGT, D, "[ TransferClose()");
ifdebug(DGT, DD, debug_targets());
debug0(DGA, D, " calling FreeGalley from TransferClose");
if( LastDown(root_galley) != root_galley )
{ inners = nilobj;
FreeGalley(root_galley, root_galley, &inners, nilobj, nilobj);
if( inners != nilobj )
{
debug0(DGF, D, " calling FlushInners() from TransferClose");
FlushInners(inners, nilobj);
}
debug0(DGF, D, " calling FlushGalley from TransferClose");
FlushGalley(root_galley);
}
debug0(DGT, D, "] TransferClose returning.");
}
