+/*
+ This file is part of LilyPond, the GNU music typesetter.
+
+ Copyright (C) 2000--2015 Jan Nieuwenhuizen <janneke@gnu.org>
+
+ LilyPond 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 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond 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 LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "align-interface.hh"
+#include "axis-group-interface.hh"
+#include "font-interface.hh"
+#include "grob-interface.hh"
+#include "item.hh"
+#include "lily-proto.hh"
+#include "line-interface.hh"
+#include "note-column.hh"
+#include "output-def.hh"
+#include "paper-column.hh"
+#include "pointer-group-interface.hh"
+#include "spanner.hh"
+#include "staff-symbol-referencer.hh"
+#include "system.hh"
+#include "text-interface.hh"
+#include "warn.hh"
+
+class Line_spanner
+{
+public:
+ DECLARE_SCHEME_CALLBACK (print, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_cross_staff, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_left_bound_info, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_left_bound_info_and_text, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_right_bound_info, (SCM));
+ DECLARE_SCHEME_CALLBACK (calc_bound_info, (SCM, Direction));
+};
+
+Spanner *parent_spanner (Grob *g)
+{
+ if (has_interface<Spanner> (g))
+ return dynamic_cast<Spanner *> (g);
+ return parent_spanner (g->get_parent (Y_AXIS));
+}
+
+SCM
+Line_spanner::calc_bound_info (SCM smob, Direction dir)
+{
+ Spanner *me = unsmob<Spanner> (smob);
+
+ Grob *commonx = me->get_bound (LEFT)->common_refpoint (me->get_bound (RIGHT), X_AXIS);
+ commonx = me->common_refpoint (commonx, X_AXIS);
+
+ SCM bound_details = me->get_property ("bound-details");
+
+ SCM details = SCM_BOOL_F;
+ if (scm_is_false (details))
+ details = ly_assoc_get ((dir == LEFT)
+ ? ly_symbol2scm ("left")
+ : ly_symbol2scm ("right"), bound_details, SCM_BOOL_F);
+
+ if (me->get_bound (dir)->break_status_dir ())
+ {
+ SCM extra = ly_assoc_get ((dir == LEFT)
+ ? ly_symbol2scm ("left-broken")
+ : ly_symbol2scm ("right-broken"), bound_details, SCM_EOL);
+
+ details = scm_append (scm_list_2 (extra, details));
+ }
+
+ if (scm_is_false (details))
+ details = ly_assoc_get (ly_symbol2scm ("default"), bound_details, SCM_EOL);
+
+ SCM text = ly_assoc_get (ly_symbol2scm ("text"), details, SCM_BOOL_F);
+ if (Text_interface::is_markup (text))
+ {
+ Output_def *layout = me->layout ();
+ SCM properties = Font_interface::text_font_alist_chain (me);
+ details = scm_acons (ly_symbol2scm ("stencil"),
+ Text_interface::interpret_markup (layout->self_scm (),
+ properties, text),
+ details);
+ }
+
+ if (!scm_is_number (ly_assoc_get (ly_symbol2scm ("X"), details, SCM_BOOL_F)))
+ {
+ Direction attach = (Direction)
+ robust_scm2int (ly_assoc_get (ly_symbol2scm ("attach-dir"),
+ details, SCM_BOOL_F),
+ CENTER);
+
+ Item *bound_item = me->get_bound (dir);
+ Grob *bound_grob = bound_item;
+ if (to_boolean (ly_assoc_get (ly_symbol2scm ("end-on-note"), details, SCM_BOOL_F))
+ && bound_item->break_status_dir ())
+ {
+ extract_grob_set (me, "note-columns", columns);
+ if (columns.size ())
+ bound_grob = (dir == LEFT)
+ ? columns[0] : columns.back ();
+ }
+
+ Real x_coord = (has_interface<Paper_column> (bound_grob)
+ ? Axis_group_interface::generic_bound_extent (bound_grob, commonx, X_AXIS)
+ : robust_relative_extent (bound_grob, commonx, X_AXIS)).linear_combination (attach);
+
+ Grob *acc = unsmob<Grob> (bound_grob->get_object ("accidental-grob"));
+ if (acc && to_boolean (ly_assoc_get (ly_symbol2scm ("end-on-accidental"), details, SCM_BOOL_F)))
+ x_coord = robust_relative_extent (acc, commonx, X_AXIS).linear_combination (attach);
+
+ Grob *dot = unsmob<Grob> (bound_grob->get_object ("dot"));
+ if (dot && to_boolean (ly_assoc_get (ly_symbol2scm ("start-at-dot"), details, SCM_BOOL_F)))
+ x_coord = robust_relative_extent (dot, commonx, X_AXIS).linear_combination (attach);
+
+ details = scm_acons (ly_symbol2scm ("X"),
+ scm_from_double (x_coord),
+ details);
+ }
+
+ if (!scm_is_number (ly_assoc_get (ly_symbol2scm ("Y"), details, SCM_BOOL_F)))
+ {
+ Real y = 0.0;
+
+ Real extra_dy = robust_scm2double (me->get_property ("extra-dy"),
+ 0.0);
+
+ Grob *common_y = me->common_refpoint (me->get_bound (dir), Y_AXIS);
+ if (me->get_bound (dir)->break_status_dir ())
+ {
+ if (to_boolean (me->get_property ("simple-Y")))
+ {
+ Spanner *orig = dynamic_cast<Spanner *>(me->original ());
+ Spanner *extreme = dir == LEFT ? orig->broken_intos_.front () : orig->broken_intos_.back ();
+ Grob *e_bound = extreme->get_bound (dir);
+ Grob *e_common_y = extreme->common_refpoint (e_bound, Y_AXIS);
+ y = e_bound->extent (e_common_y, Y_AXIS).center ();
+ }
+ else
+ {
+ Spanner *next_sp = me->broken_neighbor (dir);
+ Item *next_bound = next_sp->get_bound (dir);
+
+ if (next_bound->break_status_dir ())
+ {
+ programming_error ("no note heads for the line spanner on neighbor line?"
+ " Confused.");
+ me->suicide ();
+ return SCM_EOL;
+ }
+
+ Spanner *next_bound_parent = parent_spanner (next_bound);
+ Interval next_ext = next_bound->extent (next_bound_parent, Y_AXIS);
+
+ /*
+ We want to know what would be the y-position of the next
+ bound (relative to my y-parent) if it belonged to the
+ same system as this bound. We rely on the fact that the
+ y-parent of the next bound is a spanner (probably the
+ VerticalAxisGroup of a staff) that extends over the break.
+ */
+ Spanner *next_bound_parent_on_this_line
+ = next_bound_parent->broken_neighbor (-dir);
+
+ if (next_bound_parent_on_this_line)
+ {
+ Grob *common = me->common_refpoint (next_bound_parent_on_this_line, Y_AXIS);
+ Real bound_offset = next_bound_parent_on_this_line->relative_coordinate (common, Y_AXIS);
+ y = next_ext.center () + bound_offset - me->relative_coordinate (common, Y_AXIS);
+ }
+ else
+ {
+ /*
+ We fall back to assuming that the distance between
+ staves doesn't change over line breaks.
+ */
+ programming_error ("next-bound's parent doesn't extend to this line");
+ Grob *next_system = next_bound->get_system ();
+ Grob *this_system = me->get_system ();
+ y = next_ext.center () + next_bound_parent->relative_coordinate (next_system, Y_AXIS)
+ - me->relative_coordinate (this_system, Y_AXIS);
+ }
+ }
+ }
+ else
+ {
+ Interval ii = me->get_bound (dir)->extent (common_y, Y_AXIS);
+ if (!ii.is_empty())
+ y = ii.center ();
+ details = scm_acons (ly_symbol2scm ("common-Y"), common_y->self_scm (), details);
+ }
+
+ y += dir * extra_dy / 2;
+ details = scm_acons (ly_symbol2scm ("Y"), scm_from_double (y), details);
+ }
+
+ return details;
+}
+
+MAKE_SCHEME_CALLBACK (Line_spanner, calc_cross_staff, 1);
+SCM
+Line_spanner::calc_cross_staff (SCM smob)
+{
+ Spanner *me = unsmob<Spanner> (smob);
+ if (!me)
+ return SCM_BOOL_F;
+
+ if (to_boolean (me->get_bound (LEFT)->get_property ("non-musical"))
+ || to_boolean (me->get_bound (RIGHT)->get_property ("non-musical")))
+ return SCM_BOOL_F;
+
+ return scm_from_bool (Staff_symbol_referencer::get_staff_symbol (me->get_bound (LEFT))
+ != Staff_symbol_referencer::get_staff_symbol (me->get_bound (RIGHT)));
+}
+
+MAKE_SCHEME_CALLBACK (Line_spanner, calc_right_bound_info, 1);
+SCM
+Line_spanner::calc_right_bound_info (SCM smob)
+{
+ return Line_spanner::calc_bound_info (smob, RIGHT);
+}
+
+MAKE_SCHEME_CALLBACK (Line_spanner, calc_left_bound_info, 1);
+SCM
+Line_spanner::calc_left_bound_info (SCM smob)
+{
+ return Line_spanner::calc_bound_info (smob, LEFT);
+}
+
+MAKE_SCHEME_CALLBACK (Line_spanner, calc_left_bound_info_and_text, 1);
+SCM
+Line_spanner::calc_left_bound_info_and_text (SCM smob)
+{
+ SCM alist = Line_spanner::calc_bound_info (smob, LEFT);
+ Spanner *me = unsmob<Spanner> (smob);
+
+ SCM text = me->get_property ("text");
+ if (Text_interface::is_markup (text)
+ && me->get_bound (LEFT)->break_status_dir () == CENTER
+ && scm_is_false (ly_assoc_get (ly_symbol2scm ("stencil"), alist, SCM_BOOL_F)))
+ {
+ Output_def *layout = me->layout ();
+ SCM properties = Font_interface::text_font_alist_chain (me);
+ alist = scm_acons (ly_symbol2scm ("stencil"),
+ Text_interface::interpret_markup (layout->self_scm (),
+ properties, text),
+ alist);
+ }
+
+ return alist;
+}
+
+MAKE_SCHEME_CALLBACK (Line_spanner, print, 1);
+SCM
+Line_spanner::print (SCM smob)
+{
+ Spanner *me = unsmob<Spanner> (smob);
+
+ // Triggers simple-Y calculations
+ bool simple_y = to_boolean (me->get_property ("simple-Y")) && !to_boolean (me->get_property ("cross-staff"));
+
+ Drul_array<SCM> bounds (me->get_property ("left-bound-info"),
+ me->get_property ("right-bound-info"));
+
+ Grob *commonx = me->get_bound (LEFT)->common_refpoint (me->get_bound (RIGHT), X_AXIS);
+ commonx = me->common_refpoint (commonx, X_AXIS);
+
+ Drul_array<Offset> span_points;
+
+ for (LEFT_and_RIGHT (d))
+ {
+ Offset z (robust_scm2double (ly_assoc_get (ly_symbol2scm ("X"),
+ bounds[d], SCM_BOOL_F), 0.0),
+ robust_scm2double (ly_assoc_get (ly_symbol2scm ("Y"),
+ bounds[d], SCM_BOOL_F), 0.0));
+
+ span_points[d] = z;
+ }
+
+ Drul_array<Real> gaps (0, 0);
+ Drul_array<bool> arrows (0, 0);
+ Drul_array<Stencil *> stencils (0, 0);
+ Drul_array<Grob *> common_y (0, 0);
+
+ // For scaling of 'padding and 'stencil-offset
+ Real magstep
+ = pow (2, robust_scm2double (me->get_property ("font-size"), 0.0) / 6);
+
+ for (LEFT_and_RIGHT (d))
+ {
+ gaps[d] = robust_scm2double (ly_assoc_get (ly_symbol2scm ("padding"),
+ bounds[d], SCM_BOOL_F), 0.0);
+ arrows[d] = to_boolean (ly_assoc_get (ly_symbol2scm ("arrow"),
+ bounds[d], SCM_BOOL_F));
+ stencils[d] = unsmob<Stencil> (ly_assoc_get (ly_symbol2scm ("stencil"),
+ bounds[d], SCM_BOOL_F));
+ common_y[d] = unsmob<Grob> (ly_assoc_get (ly_symbol2scm ("common-Y"),
+ bounds[d], SCM_BOOL_F));
+ if (!common_y[d])
+ common_y[d] = me;
+ }
+
+ Grob *my_common_y = common_y[LEFT]->common_refpoint (common_y[RIGHT], Y_AXIS);
+
+ if (!simple_y)
+ {
+ for (LEFT_and_RIGHT (d))
+ span_points[d][Y_AXIS] += common_y[d]->relative_coordinate (my_common_y, Y_AXIS);
+ }
+
+ Interval normalized_endpoints = robust_scm2interval (me->get_property ("normalized-endpoints"), Interval (0, 1));
+ Real y_length = span_points[RIGHT][Y_AXIS] - span_points[LEFT][Y_AXIS];
+
+ span_points[LEFT][Y_AXIS] += normalized_endpoints[LEFT] * y_length;
+ span_points[RIGHT][Y_AXIS] -= (1 - normalized_endpoints[RIGHT]) * y_length;
+
+ Offset dz = (span_points[RIGHT] - span_points[LEFT]);
+ Offset dz_dir = dz.direction ();
+ if (gaps[LEFT] + gaps[RIGHT] > dz.length ())
+ {
+ return SCM_EOL;
+ }
+
+ Stencil line;
+ for (LEFT_and_RIGHT (d))
+ {
+ span_points[d] += -d * gaps[d] * magstep * dz.direction ();
+
+ if (stencils[d])
+ {
+ Stencil s = stencils[d]->translated (span_points[d]);
+ SCM align = ly_assoc_get (ly_symbol2scm ("stencil-align-dir-y"),
+ bounds[d], SCM_BOOL_F);
+ SCM off = ly_assoc_get (ly_symbol2scm ("stencil-offset"),
+ bounds[d], SCM_BOOL_F);
+
+ if (scm_is_number (align))
+ s.align_to (Y_AXIS, scm_to_double (align));
+
+ if (is_number_pair (off))
+ s.translate (ly_scm2offset (off) * magstep);
+
+ line.add_stencil (s);
+ }
+ }
+
+ for (LEFT_and_RIGHT (d))
+ {
+ if (stencils[d])
+ span_points[d] += dz_dir *
+ (stencils[d]->extent (X_AXIS)[-d] / dz_dir[X_AXIS]);
+ }
+
+ Offset adjust = dz.direction () * Staff_symbol_referencer::staff_space (me);
+ Offset line_left = span_points[LEFT] + (arrows[LEFT] ? adjust * 1.4 : Offset (0, 0));
+ Offset line_right = span_points[RIGHT] - (arrows[RIGHT] ? adjust * 0.55 : Offset (0, 0));
+
+ if (line_right[X_AXIS] > line_left[X_AXIS])
+ {
+ line.add_stencil (Line_interface::line (me, line_left, line_right));
+
+ line.add_stencil (Line_interface::arrows (me,
+ span_points[LEFT],
+ span_points[RIGHT],
+ arrows[LEFT],
+ arrows[RIGHT]));
+ }
+
+ line.translate (Offset (-me->relative_coordinate (commonx, X_AXIS),
+ simple_y ? 0.0 : -me->relative_coordinate (my_common_y, Y_AXIS)));
+
+ return line.smobbed_copy ();
+}
+
+ADD_INTERFACE (Line_spanner,
+ "Generic line drawn between two objects, e.g., for use with"
+ " glissandi.",
+
+ /* properties */
+ "bound-details "
+ "extra-dy "
+ "gap "
+ "left-bound-info "
+ "note-columns "
+ "right-bound-info "
+ "simple-Y "
+ "thickness "
+ "to-barline "
+ );
projects / lilypond.git / blobdiff