X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fgrob.cc;h=828ae7f07b40687457f8031475f0a42d9992dc67;hb=623fac8d645e4078af36758af5d437c5eb39e793;hp=36aadb4e938b549df05260d98cf7dc13030e6455;hpb=0e13fe23a0698ae81b9e618b15841b8a88919ed7;p=lilypond.git diff --git a/lily/grob.cc b/lily/grob.cc index 36aadb4e93..828ae7f07b 100644 --- a/lily/grob.cc +++ b/lily/grob.cc @@ -1,7 +1,7 @@ /* This file is part of LilyPond, the GNU music typesetter. - Copyright (C) 1997--2011 Han-Wen Nienhuys + Copyright (C) 1997--2012 Han-Wen Nienhuys LilyPond is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -170,6 +170,17 @@ Grob::get_print_stencil () const = *unsmob_stencil (scm_call_1 (ly_lily_module_constant ("stencil-whiteout"), retval.smobbed_copy ())); } + + SCM id = get_property ("id"); + if (scm_is_string (id)) + { + SCM expr = scm_list_3 (ly_symbol2scm ("id"), + id, + retval.expr ()); + + retval = Stencil (retval.extent_box (), expr); + } + } return retval; @@ -455,7 +466,10 @@ Grob::extent (Grob *refp, Axis a) const ((Grob *)this)->dim_cache_[a].extent_ = new Interval (real_ext); } - real_ext.translate (offset); + // We never want nan, so we avoid shifting infinite values. + for (LEFT_and_RIGHT (d)) + if (!isinf (real_ext[d])) + real_ext[d] += offset; return real_ext; } @@ -483,8 +497,6 @@ Grob::pure_height (Grob *refp, int start, int end) Interval Grob::maybe_pure_extent (Grob *refp, Axis a, bool pure, int start, int end) { - if (pure && a != Y_AXIS) - programming_error ("tried to get pure width"); return (pure && a == Y_AXIS) ? pure_height (refp, start, end) : extent (refp, a); } @@ -515,15 +527,39 @@ Grob::less (Grob *g1, Grob *g2) Grob * Grob::common_refpoint (Grob const *s, Axis a) const { - /* I don't like the quadratic aspect of this code, but I see no - other way. The largest chain of parents might be 10 high or so, - so it shouldn't be a real issue. */ - for (Grob const *c = this; c; c = c->dim_cache_[a].parent_) - for (Grob const *d = s; d; d = d->dim_cache_[a].parent_) - if (d == c) - return (Grob *) d; - return 0; + /* Catching the trivial cases is likely costlier than just running + through: one can't avoid going to the respective chain ends + anyway. We might save the second run through when the chain ends + differ, but keeping track of the ends makes the loop more costly. + */ + + int balance = 0; + Grob const *c; + Grob const *d; + + for (c = this; c; ++balance) + c = c->dim_cache_[a].parent_; + + for (d = s; d; --balance) + d = d->dim_cache_[a].parent_; + + /* Cut down ancestry to same size */ + + for (c = this; balance > 0; --balance) + c = c->dim_cache_[a].parent_; + + for (d = s; balance < 0; ++balance) + d = d->dim_cache_[a].parent_; + + /* Now find point where our lineages converge */ + while (c != d) + { + c = c->dim_cache_[a].parent_; + d = d->dim_cache_[a].parent_; + } + + return (Grob *) c; } void @@ -572,6 +608,101 @@ Grob::fixup_refpoint () } } +/**************************************************************** + VERTICAL ORDERING +****************************************************************/ + +Grob * +get_maybe_root_vertical_alignment (Grob *g, Grob *maybe) +{ + if (!g) + return maybe; + if (Align_interface::has_interface (g)) + return get_maybe_root_vertical_alignment (g->get_parent (Y_AXIS), g); + return get_maybe_root_vertical_alignment (g->get_parent (Y_AXIS), maybe); + +} + +Grob * +Grob::get_root_vertical_alignment (Grob *g) +{ + return get_maybe_root_vertical_alignment (g, 0); +} + +Grob * +Grob::get_vertical_axis_group (Grob *g) +{ + if (!g) + return 0; + if (!g->get_parent (Y_AXIS)) + return 0; + if (Axis_group_interface::has_interface (g) + && Align_interface::has_interface (g->get_parent (Y_AXIS))) + return g; + return get_vertical_axis_group (g->get_parent (Y_AXIS)); + +} + +int +Grob::get_vertical_axis_group_index (Grob *g) +{ + Grob *val = get_root_vertical_alignment (g); + if (!val) + return -1; + Grob *vax = get_vertical_axis_group (g); + extract_grob_set (val, "elements", elts); + for (vsize i = 0; i < elts.size (); i++) + if (elts[i] == vax) + return (int) i; + g->programming_error ("could not find this grob's vertical axis group in the vertical alignment"); + return -1; +} + +bool +Grob::vertical_less (Grob *g1, Grob *g2) +{ + return internal_vertical_less (g1, g2, false); +} + +bool +Grob::pure_vertical_less (Grob *g1, Grob *g2) +{ + return internal_vertical_less (g1, g2, true); +} + +bool +Grob::internal_vertical_less (Grob *g1, Grob *g2, bool pure) +{ + Grob *vag = get_root_vertical_alignment (g1); + if (!vag) + { + g1->programming_error ("grob does not belong to a VerticalAlignment?"); + return false; + } + + Grob *ag1 = get_vertical_axis_group (g1); + Grob *ag2 = get_vertical_axis_group (g2); + + extract_grob_set (vag, "elements", elts); + + if (ag1 == ag2 && !pure) + { + Grob *common = g1->common_refpoint (g2, Y_AXIS); + return g1->relative_coordinate (common, Y_AXIS) > g2->relative_coordinate (common, Y_AXIS); + } + + for (vsize i = 0; i < elts.size (); i++) + { + if (elts[i] == ag1) + return true; + if (elts[i] == ag2) + return false; + } + + g1->programming_error ("could not place this grob in its axis group"); + return false; +} + /**************************************************************** MESSAGES ****************************************************************/ @@ -667,9 +798,12 @@ ADD_INTERFACE (Grob, "cause " "color " "cross-staff " + "id " "extra-X-extent " "extra-Y-extent " "extra-offset " + "footnote-music " + "forced-spacing " "interfaces " "layer " "meta "