diff options
Diffstat (limited to 'source/luametatex/source/tex/texbuildpage.c')
| -rw-r--r-- | source/luametatex/source/tex/texbuildpage.c | 286 |
1 files changed, 149 insertions, 137 deletions
diff --git a/source/luametatex/source/tex/texbuildpage.c b/source/luametatex/source/tex/texbuildpage.c index 947ef1776..be75042eb 100644 --- a/source/luametatex/source/tex/texbuildpage.c +++ b/source/luametatex/source/tex/texbuildpage.c @@ -337,14 +337,32 @@ static halfword tex_aux_page_badness(scaled goal) } } +static halfword tex_aux_insert_topskip(halfword height, int contribution) +{ + if (lmt_page_builder_state.contents != contribute_nothing) { + lmt_page_builder_state.contents = contribution; + } else { + tex_aux_freeze_page_specs(contribution); + } + { + halfword glue = tex_new_param_glue_node(top_skip_code, top_skip_glue); + if (glue_amount(glue) > height) { + glue_amount(glue) -= height; + } else { + glue_amount(glue) = 0; + } + return glue; + } +} + void tex_build_page(void) { if (node_next(contribute_head) && ! lmt_page_builder_state.output_active) { /*tex The (upcoming) penalty to be added to the badness: */ - int pi = 0; + int penalty = 0; do { - halfword p = node_next(contribute_head); - halfword last_type = node_type(p); + halfword current = node_next(contribute_head); + halfword type = node_type(current); /*tex Update the values of |last_glue|, |last_penalty|, and |last_kern|. */ if (lmt_page_builder_state.last_glue != max_halfword) { tex_flush_node(lmt_page_builder_state.last_glue); @@ -353,21 +371,21 @@ void tex_build_page(void) lmt_page_builder_state.last_penalty = 0; lmt_page_builder_state.last_kern = 0; lmt_page_builder_state.last_boundary = 0; - lmt_page_builder_state.last_node_type = last_type; - lmt_page_builder_state.last_node_subtype = node_subtype(p); + lmt_page_builder_state.last_node_type = type; + lmt_page_builder_state.last_node_subtype = node_subtype(current); lmt_page_builder_state.last_extra_used = 0; - switch (last_type) { + switch (type) { case glue_node: - lmt_page_builder_state.last_glue = tex_new_glue_node(p, node_subtype(p)); + lmt_page_builder_state.last_glue = tex_new_glue_node(current, node_subtype(current)); break; case penalty_node: - lmt_page_builder_state.last_penalty = penalty_amount(p); + lmt_page_builder_state.last_penalty = penalty_amount(current); break; case kern_node: - lmt_page_builder_state.last_kern = kern_amount(p); + lmt_page_builder_state.last_kern = kern_amount(current); break; case boundary_node: - lmt_page_builder_state.last_boundary = boundary_data(p); + lmt_page_builder_state.last_boundary = boundary_data(current); break; } /*tex @@ -392,102 +410,96 @@ void tex_build_page(void) the contribution list will not be contributed until we know its successor. */ - switch (last_type) { + switch (type) { case hlist_node: case vlist_node: - if (auto_migrating_mode_permitted(auto_migration_mode_par, auto_migrate_post)) { - halfword h = box_post_migrated(p); - if (h) { - halfword t = tex_tail_of_node_list(h); - if (node_next(p)) { - tex_couple_nodes(t, node_next(p)); - } else { - contribute_tail = t; + { + if (auto_migrating_mode_permitted(auto_migration_mode_par, auto_migrate_post)) { + halfword head = box_post_migrated(current); + if (head) { + halfword tail = tex_tail_of_node_list(head); + if (tracing_adjusts_par > 1) { + tex_begin_diagnostic(); + tex_print_format("[adjust: post, mvl]"); + tex_print_node_list(head,"post",show_box_depth_par, show_box_breadth_par); + tex_end_diagnostic(); + } + if (node_next(current)) { + tex_couple_nodes(tail, node_next(current)); + } else { + contribute_tail = tail; + } + tex_couple_nodes(current, head); + box_post_migrated(current) = null; } - tex_couple_nodes(p, h); - box_post_migrated(p) = null; } - } - if (auto_migrating_mode_permitted(auto_migration_mode_par, auto_migrate_pre)) { - halfword h = box_pre_migrated(p); - if (h) { - halfword t = tex_tail_of_node_list(h); - tex_couple_nodes(t, p); - tex_couple_nodes(contribute_head, h); - box_pre_migrated(p) = null; - continue; - } - } - /* common with rule */ - if (lmt_page_builder_state.contents < contribute_box) { // nothing or insert - /*tex - Initialize the current page, insert the |\topskip| glue ahead of |p|, - and |goto continue|. - */ - halfword q; - if (lmt_page_builder_state.contents != contribute_nothing) { - lmt_page_builder_state.contents = contribute_box; - } else { - tex_aux_freeze_page_specs(contribute_box); + if (auto_migrating_mode_permitted(auto_migration_mode_par, auto_migrate_pre)) { + halfword head = box_pre_migrated(current); + if (head) { + halfword tail = tex_tail_of_node_list(head); + if (tracing_adjusts_par > 1) { + tex_begin_diagnostic(); + tex_print_format("[adjust: pre, mvl]"); + tex_print_node_list(head,"pre",show_box_depth_par, show_box_breadth_par); + tex_end_diagnostic(); + } + tex_couple_nodes(tail, current); + tex_couple_nodes(contribute_head, current); + // if (contribute_head == contribute_tail) { + // contribute_tail = tail; + // } + box_pre_migrated(current) = null; + continue; + } } - q = tex_new_param_glue_node(top_skip_code, top_skip_glue); - if (glue_amount(q) > box_height(p)) { - glue_amount(q) -= box_height(p); + if (lmt_page_builder_state.contents < contribute_box) { + /*tex + Initialize the current page, insert the |\topskip| glue ahead of |p|, + and |goto continue|. + */ + halfword gluenode = tex_aux_insert_topskip(box_height(current), contribute_box); + tex_couple_nodes(gluenode, current); + tex_couple_nodes(contribute_head, gluenode); + continue; } else { - glue_amount(q) = 0; + /*tex Move a box to the current page, then |goto contribute|. */ + page_total += page_depth + box_height(current); + page_depth = box_depth(current); + goto CONTRIBUTE; } - tex_couple_nodes(q, p); - tex_couple_nodes(contribute_head, q); - continue; - } else { - /*tex Move a box to the current page, then |goto contribute|. */ - page_total += page_depth + box_height(p); - page_depth = box_depth(p); - goto CONTRIBUTE; } case rule_node: /* common with box */ if (lmt_page_builder_state.contents < contribute_box) { - halfword q; - if (lmt_page_builder_state.contents != contribute_nothing) { - lmt_page_builder_state.contents = contribute_rule; - } else { - tex_aux_freeze_page_specs(contribute_rule); - } - q = tex_new_param_glue_node(top_skip_code, top_skip_glue); - if (glue_amount(q) > rule_height(p)) { - glue_amount(q) -= rule_height(p); - } else { - glue_amount(q) = 0; - } - tex_couple_nodes(q, p); - tex_couple_nodes(contribute_head, q); + halfword gluenode = tex_aux_insert_topskip(rule_height(current), contribute_rule); + tex_couple_nodes(gluenode, current); + tex_couple_nodes(contribute_head, gluenode); continue; } else { - page_total += page_depth + rule_height(p); - page_depth = rule_depth(p); + page_total += page_depth + rule_height(current); + page_depth = rule_depth(current); goto CONTRIBUTE; } case boundary_node: if (lmt_page_builder_state.contents < contribute_box) { goto DISCARD; - } else if (node_subtype(p) == page_boundary) { + } else if (node_subtype(current) == page_boundary) { /*tex We just triggered the pagebuilder for which we needed a contribution. We fake a zero penalty so that all gets processed. The main rationale is that we get a better indication of what we do. Of course a callback can remove this node so that it is never seen. Triggering from the callback is not doable. */ - halfword n = tex_new_node(penalty_node, user_penalty_subtype); + halfword penaltynode = tex_new_node(penalty_node, user_penalty_subtype); /* todo: copy attributes */ tex_page_boundary_message("processed as penalty", 0); - tex_try_couple_nodes(node_prev(p), n); - tex_try_couple_nodes(n, node_next(p)); - tex_flush_node(p); - penalty_amount(n) = boundary_data(p); - p = n; - node_next(contribute_head) = p; - pi = 0; + tex_try_couple_nodes(node_prev(current), penaltynode); + tex_try_couple_nodes(penaltynode, node_next(current)); + tex_flush_node(current); + penalty_amount(penaltynode) = boundary_data(current); + current = penaltynode; + node_next(contribute_head) = current; + penalty = 0; break; } else { goto DISCARD; @@ -498,7 +510,7 @@ void tex_build_page(void) if (lmt_page_builder_state.contents < contribute_box) { goto DISCARD; } else if (precedes_break(lmt_page_builder_state.page_tail)) { - pi = 0; + penalty = 0; break; } else { goto UPDATEHEIGHTS; @@ -506,10 +518,10 @@ void tex_build_page(void) case kern_node: if (lmt_page_builder_state.contents < contribute_box) { goto DISCARD; - } else if (! node_next(p)) { + } else if (! node_next(current)) { return; - } else if (node_type(node_next(p)) == glue_node) { - pi = 0; + } else if (node_type(node_next(current)) == glue_node) { + penalty = 0; break; } else { goto UPDATEHEIGHTS; @@ -518,7 +530,7 @@ void tex_build_page(void) if (lmt_page_builder_state.contents < contribute_box) { goto DISCARD; } else { - pi = penalty_amount(p); + penalty = penalty_amount(current); break; } case mark_node: @@ -529,7 +541,7 @@ void tex_build_page(void) Append an insertion to the current page and |goto contribute|. The insertion number (index) is registered in the subtype (not any more for a while). */ - halfword index = insert_index(p); /* initially 65K */ + halfword index = insert_index(current); /* initially 65K */ halfword location = page_insert_head; halfword multiplier = tex_get_insert_multiplier(index); halfword content = tex_get_insert_content(index); @@ -568,13 +580,13 @@ void tex_build_page(void) general). */ - halfword q = tex_new_node(split_node, normal_split_subtype); + halfword splitnode = tex_new_node(split_node, normal_split_subtype); scaled advance = 0; halfword distance = lmt_get_insert_distance(index, slot); /*tex Callback: we get a copy! */ - split_insert_index(q) = index; - tex_try_couple_nodes(q, node_next(location)); - tex_couple_nodes(location, q); - location = q; + split_insert_index(splitnode) = index; + tex_try_couple_nodes(splitnode, node_next(location)); + tex_couple_nodes(location, splitnode); + location = splitnode; if (! tex_aux_valid_insert_content(content)) { content = tex_aux_delete_box_content(content); tex_set_insert_content(index, content); @@ -612,19 +624,19 @@ void tex_build_page(void) } /*tex I really need to check this logic with the original \LUATEX\ code. */ if (node_type(location) == split_node && node_subtype(location) == insert_split_subtype) { - lmt_page_builder_state.insert_penalties += insert_float_cost(p); + lmt_page_builder_state.insert_penalties += insert_float_cost(current); } else { scaled delta = page_goal - page_total - page_depth + page_shrink; - scaled needed = insert_total_height(p); - split_last_insert(location) = p; + scaled needed = insert_total_height(current); + split_last_insert(location) = current; /*tex This much room is left if we shrink the maximum. */ if (multiplier != 1000) { /*tex This much room is needed. */ needed = tex_x_over_n(needed, 1000) * multiplier; } - if ((needed <= 0 || needed <= delta) && (insert_total_height(p) + box_height(location) <= limit)) { - update_page_goal(index, insert_total_height(p), needed); - box_height(location) += insert_total_height(p); + if ((needed <= 0 || needed <= delta) && (insert_total_height(current) + box_height(location) <= limit)) { + update_page_goal(index, insert_total_height(current), needed); + box_height(location) += insert_total_height(current); } else { /*tex @@ -645,7 +657,7 @@ void tex_build_page(void) */ scaled height; - halfword brk, penalty; + halfword breaknode, penalty; if (multiplier <= 0) { height = max_dimen; } else { @@ -657,9 +669,9 @@ void tex_build_page(void) if (height > limit - box_height(location)) { height = limit - box_height(location); } - brk = tex_vert_break(insert_list(p), height, insert_max_depth(p)); + breaknode = tex_vert_break(insert_list(current), height, insert_max_depth(current)); box_height(location) += lmt_packaging_state.best_height_plus_depth; - penalty = brk ? (node_type(brk) == penalty_node ? penalty_amount(brk) : 0) : eject_penalty; + penalty = breaknode ? (node_type(breaknode) == penalty_node ? penalty_amount(breaknode) : 0) : eject_penalty; if (tracing_pages_par > 0) { tex_aux_display_insertion_split_cost(index, height, penalty); } @@ -668,15 +680,15 @@ void tex_build_page(void) } update_page_goal(index, lmt_packaging_state.best_height_plus_depth, lmt_packaging_state.best_height_plus_depth); node_subtype(location) = insert_split_subtype; - split_broken(location) = brk; - split_broken_insert(location) = p; + split_broken(location) = breaknode; + split_broken_insert(location) = current; lmt_page_builder_state.insert_penalties += penalty; } } goto CONTRIBUTE; } default: - tex_formatted_error("pagebuilder", "invalid node of type %d in vertical mode", node_type(p)); + tex_formatted_error("pagebuilder", "invalid node of type %d in vertical mode", node_type(current)); break; } /*tex @@ -684,7 +696,7 @@ void tex_build_page(void) prepare for output, and either fire up the users output routine and |return| or ship out the page and |goto done|. */ - if (pi < infinite_penalty) { + if (penalty < infinite_penalty) { /*tex Compute the badness, |b|, of the current page, using |awful_bad| if the box is too full. The |c| variable holds the costs. @@ -714,10 +726,10 @@ void tex_build_page(void) } if (badness >= awful_bad) { criterium = badness; - } else if (pi <= eject_penalty) { - criterium = pi; + } else if (penalty <= eject_penalty) { + criterium = penalty; } else if (badness < infinite_bad) { - criterium = badness + pi + lmt_page_builder_state.insert_penalties; + criterium = badness + penalty + lmt_page_builder_state.insert_penalties; } else { criterium = deplorable; } @@ -726,24 +738,24 @@ void tex_build_page(void) } { int moveon = criterium <= lmt_page_builder_state.least_cost; - int fireup = criterium == awful_bad || pi <= eject_penalty; + int fireup = criterium == awful_bad || penalty <= eject_penalty; if (tracing_pages_par > 0) { - tex_aux_display_page_break_cost(badness, pi, criterium, moveon, fireup); + tex_aux_display_page_break_cost(badness, penalty, criterium, moveon, fireup); } if (moveon) { - halfword r = node_next(page_insert_head); - lmt_page_builder_state.best_break = p; + halfword insert = node_next(page_insert_head); + lmt_page_builder_state.best_break = current; lmt_page_builder_state.best_size = page_goal; lmt_page_builder_state.insert_penalties = 0; lmt_page_builder_state.least_cost = criterium; - while (r != page_insert_head) { - split_best_insert(r) = split_last_insert(r); - r = node_next(r); + while (insert != page_insert_head) { + split_best_insert(insert) = split_last_insert(insert); + insert = node_next(insert); } } if (fireup) { /*tex Output the current page at the best place. */ - tex_aux_fire_up(p); + tex_aux_fire_up(current); if (lmt_page_builder_state.output_active) { /*tex User's output routine will act. */ return; @@ -759,19 +771,19 @@ void tex_build_page(void) Go here to record glue in the |active_height| table. Update the current page measurements with respect to the glue or kern specified by node~|p|. */ - switch(node_type(p)) { + switch(node_type(current)) { case kern_node: - page_total += page_depth + kern_amount(p); + page_total += page_depth + kern_amount(current); page_depth = 0; goto APPEND; case glue_node: - if (glue_stretch_order(p) > 1) { - page_stretch_1(glue_stretch_order(p)) += glue_stretch(p); + if (glue_stretch_order(current) > 1) { + page_stretch_1(glue_stretch_order(current)) += glue_stretch(current); } else { - page_stretch_2(glue_stretch_order(p)) += glue_stretch(p); + page_stretch_2(glue_stretch_order(current)) += glue_stretch(current); } - page_shrink += glue_shrink(p); - if (glue_shrink_order(p) != normal_glue_order && glue_shrink(p)) { + page_shrink += glue_shrink(current); + if (glue_shrink_order(current) != normal_glue_order && glue_shrink(current)) { tex_handle_error( normal_error_type, "Infinite glue shrinkage found on current page", @@ -779,10 +791,10 @@ void tex_build_page(void) "'\\vss' or '\\vskip 0pt minus 1fil'. Such glue doesn't belong there; but you can\n" "safely proceed, since the offensive shrinkability has been made finite." ); - tex_reset_glue_to_zero(p); - glue_shrink_order(p) = normal_glue_order; + tex_reset_glue_to_zero(current); + glue_shrink_order(current) = normal_glue_order; } - page_total += page_depth + glue_amount(p); + page_total += page_depth + glue_amount(current); page_depth = 0; goto APPEND; } @@ -796,25 +808,25 @@ void tex_build_page(void) page_depth = lmt_page_builder_state.max_depth; } APPEND: - /*tex Link node |p| into the current page and |goto done|. We assume a positive depth. */ - tex_couple_nodes(lmt_page_builder_state.page_tail, p); - lmt_page_builder_state.page_tail = p; - tex_try_couple_nodes(contribute_head, node_next(p)); - node_next(p) = null; - continue; + /*tex Link node |p| into the current page and |goto done|. We assume a positive depth. */ + tex_couple_nodes(lmt_page_builder_state.page_tail, current); + lmt_page_builder_state.page_tail = current; + tex_try_couple_nodes(contribute_head, node_next(current)); + node_next(current) = null; + continue; // or: break; DISCARD: /*tex Recycle node |p|. */ - tex_try_couple_nodes(contribute_head, node_next(p)); - node_next(p) = null; + tex_try_couple_nodes(contribute_head, node_next(current)); + node_next(current) = null; if (saving_vdiscards_par > 0) { if (lmt_packaging_state.page_discards_head) { - tex_couple_nodes(lmt_packaging_state.page_discards_tail, p); + tex_couple_nodes(lmt_packaging_state.page_discards_tail, current); } else { - lmt_packaging_state.page_discards_head = p; + lmt_packaging_state.page_discards_head = current; } - lmt_packaging_state.page_discards_tail = p; + lmt_packaging_state.page_discards_tail = current; } else { - tex_flush_node_list(p); + tex_flush_node_list(current); } } while (node_next(contribute_head)); /*tex Make the contribution list empty by setting its tail to |contribute_head|. */ |