-/*
- staff-side.cc -- implement Staff_side_element
-
+/*
+ side-position-interface.cc -- implement Side_position_interface
+
source file of the GNU LilyPond music typesetter
-
- (c) 1998--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
-#include <math.h> // ceil.
+
+ (c) 1998--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#include "side-position-interface.hh"
-#include "debug.hh"
+
+#include <cmath> // ceil.
+#include <algorithm>
+using namespace std;
+
+#include "note-head.hh"
+#include "warn.hh"
#include "warn.hh"
#include "dimensions.hh"
#include "staff-symbol-referencer.hh"
-#include "group-interface.hh"
+#include "pointer-group-interface.hh"
+#include "directional-element-interface.hh"
+#include "staff-symbol-referencer.hh"
+#include "staff-symbol.hh"
+#include "string-convert.hh"
+#include "misc.hh"
void
-Side_position::add_support (Grob*me, Grob*e)
+Side_position_interface::add_support (Grob *me, Grob *e)
{
- Pointer_group_interface::add_element (me, "side-support-elements",e);
+ Pointer_group_interface::add_grob (me, ly_symbol2scm ("side-support-elements"), e);
}
-
-
Direction
-Side_position::get_direction (Grob*me)
+Side_position_interface::get_direction (Grob *me)
{
- SCM d = me->get_grob_property ("direction");
- if (isdir_b (d) && to_dir (d))
- return to_dir (d);
-
Direction relative_dir = Direction (1);
- SCM reldir = me->get_grob_property ("side-relative-direction"); // should use a lambda.
- if (isdir_b (reldir))
- {
- relative_dir = to_dir (reldir);
- }
-
- SCM other_elt = me->get_grob_property ("direction-source");
- Grob * e = unsmob_grob(other_elt);
+ SCM reldir = me->get_property ("side-relative-direction");
+ if (is_direction (reldir))
+ relative_dir = to_dir (reldir);
+
+ SCM other_elt = me->get_object ("direction-source");
+ Grob *e = unsmob_grob (other_elt);
if (e)
- {
- return (Direction)(relative_dir * Side_position::get_direction (e));
- }
-
- return DOWN;
+ return (Direction) (relative_dir * get_grob_direction (e));
+
+ return CENTER;
}
-
-/*
- Callback that does the aligning. Puts the element next to the support
- */
-MAKE_SCHEME_CALLBACK(Side_position,side_position,2);
+/* Put the element next to the support, optionally taking in
+ account the extent of the support. */
SCM
-Side_position::side_position (SCM element_smob, SCM axis)
+Side_position_interface::general_side_position (Grob *me, Axis a, bool use_extents)
{
- Grob *me = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
+ Real ss = Staff_symbol_referencer::staff_space (me);
+
+ extract_grob_set (me, "side-support-elements", support);
+
+ Grob *common = common_refpoint_of_array (support, me->get_parent (a), a);
+ Grob *staff_symbol = Staff_symbol_referencer::get_staff_symbol (me);
+ bool include_staff =
+ staff_symbol
+ && a == Y_AXIS
+ && scm_is_number (me->get_property ("staff-padding"))
+ && !to_boolean (me->get_property ("quantize-position"));
- Grob *common = me->parent_l (a);
- SCM support = me->get_grob_property ("side-support-elements");
- for (SCM s = support; s != SCM_EOL; s = gh_cdr (s))
- {
- Grob * e = unsmob_grob (gh_car (s));
- if (e)
- common = common->common_refpoint (e, a);
- }
-
Interval dim;
- for (SCM s = support; s != SCM_EOL; s = gh_cdr (s))
+ Interval staff_extents;
+ if (include_staff)
{
+ common = staff_symbol->common_refpoint (common, Y_AXIS);
+ staff_extents = staff_symbol->extent (common, Y_AXIS);
- Grob * e = unsmob_grob ( gh_car (s));
- if (e)
- {
- dim.unite (e->extent (common, a));
- }
+ if (include_staff)
+ dim.unite (staff_extents);
}
- if (dim.empty_b ())
+ for (int i = 0; i < support.size (); i++)
{
- dim = Interval(0,0);
+ Grob *e = support[i];
+ if (e)
+ if (use_extents)
+ dim.unite (e->extent (common, a));
+ else
+ {
+ Real x = e->relative_coordinate (common, a);
+ dim.unite (Interval (x, x));
+ }
}
- Direction dir = Side_position::get_direction (me);
-
- Real off = me->parent_l (a)->relative_coordinate (common, a);
- SCM minimum = me->remove_grob_property ("minimum-space");
-
- Real total_off = dim[dir] + off;
- SCM padding = me->remove_grob_property ("padding");
- if (gh_number_p (padding))
- {
- total_off += gh_scm2double (padding) * dir;
- }
- if (gh_number_p (minimum) && total_off * dir < gh_scm2double (minimum))
- {
- total_off = gh_scm2double (minimum) * dir;
- }
- if (fabs (total_off) > 100 CM)
- programming_error ("Huh ? Improbable staff side dim.");
+ if (dim.is_empty ())
+ dim = Interval (0, 0);
- return gh_double2scm (total_off);
-}
+ Direction dir = get_grob_direction (me);
-/**
- callback that centers the element on itself
- */
-MAKE_SCHEME_CALLBACK(Side_position,aligned_on_self,2);
-SCM
-Side_position::aligned_on_self (SCM element_smob, SCM axis)
-{
- Grob *me = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
- String s ("self-alignment-");
+ Real off = me->get_parent (a)->relative_coordinate (common, a);
+ Real minimum_space = ss * robust_scm2double (me->get_property ("minimum-space"), -1);
- s += (a == X_AXIS) ? "X" : "Y";
+ Real total_off = dim.linear_combination (dir) - off;
+ total_off += dir * ss * robust_scm2double (me->get_property ("padding"), 0);
- SCM align (me->get_grob_property (s.ch_C()));
- if (gh_number_p (align))
+ if (minimum_space >= 0
+ && dir
+ && total_off * dir < minimum_space)
+ total_off = minimum_space * dir;
+
+ /* FIXME: 100CM should relate to paper size. */
+ if (fabs (total_off) > 100 CM)
{
- Interval ext(me->extent (me,a));
+ String msg
+ = String_convert::form_string ("Improbable offset for grob %s: %f%s",
+ me->name ().to_str0 (), total_off,
+ INTERNAL_UNIT);
- if (ext.empty_b ())
- {
- programming_error ("I'm empty. Can't align on self");
- return gh_double2scm (0.0);
- }
- else
- {
- return gh_double2scm (- ext.linear_combination (gh_scm2double (align)));
- }
+ programming_error (msg);
}
- else if (unsmob_grob (align))
- {
- return gh_double2scm (- unsmob_grob (align)->relative_coordinate (me, a));
- }
- return gh_double2scm (0.0);
+ return scm_from_double (total_off);
}
-
-Real
-directed_round (Real f, Direction d)
+MAKE_SCHEME_CALLBACK (Side_position_interface, y_aligned_on_support_refpoints, 1);
+SCM
+Side_position_interface::y_aligned_on_support_refpoints (SCM smob)
{
- if (d < 0)
- return floor (f);
- else
- return ceil (f);
+ return general_side_position (unsmob_grob (smob), Y_AXIS, false);
}
+
+
/*
- Callback that quantises in staff-spaces, rounding in the direction
- of the elements "direction" elt property.
+ Position next to support, taking into account my own dimensions and padding.
+*/
- Only rounds when we're inside the staff, as determined by
- Staff_symbol_referencer::staff_radius() */
-MAKE_SCHEME_CALLBACK(Side_position,quantised_position,2);
+MAKE_SCHEME_CALLBACK (Side_position_interface, x_aligned_side, 1);
SCM
-Side_position::quantised_position (SCM element_smob, SCM )
+Side_position_interface::x_aligned_side (SCM smob)
{
- Grob *me = unsmob_grob (element_smob);
-
-
- Direction d = Side_position::get_direction (me);
-
- if (Staff_symbol_referencer::has_interface (me))
- {
- Real p = Staff_symbol_referencer::position_f (me);
- Real rp = directed_round (p, d);
- Real rad = Staff_symbol_referencer::staff_radius (me) *2 ;
- int ip = int (rp);
-
- if (abs (ip) <= rad && Staff_symbol_referencer::on_staffline (me,ip))
- {
- ip += d;
- rp += d;
- }
-
- return gh_double2scm ((rp - p) * Staff_symbol_referencer::staff_space (me) / 2.0);
- }
- return gh_double2scm (0.0);
+ return aligned_side (unsmob_grob (smob), X_AXIS);
}
-/*
- Position next to support, taking into account my own dimensions and padding.
- */
-MAKE_SCHEME_CALLBACK(Side_position,aligned_side,2);
+MAKE_SCHEME_CALLBACK (Side_position_interface, y_aligned_side, 1);
SCM
-Side_position::aligned_side (SCM element_smob, SCM axis)
+Side_position_interface::y_aligned_side (SCM smob)
{
- Grob *me = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
-
- Direction d = Side_position::get_direction (me);
- Real o = gh_scm2double (side_position (element_smob,axis));
-
- Interval iv = me->extent (me, a);
-
- if (!iv.empty_b ())
- {
- o += - iv[-d];
-
- SCM pad = me->get_grob_property ("padding");
- if (gh_number_p (pad))
- o += d *gh_scm2double (pad) ;
- }
- return gh_double2scm (o);
+ return aligned_side (unsmob_grob (smob), Y_AXIS);
}
-/*
- Position centered on parent.
- */
-MAKE_SCHEME_CALLBACK(Side_position,centered_on_parent,2);
SCM
-Side_position::centered_on_parent (SCM element_smob, SCM axis)
+Side_position_interface::aligned_side (Grob*me, Axis a)
{
- Grob *me = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
- Grob *him = me->parent_l (a);
-
- return gh_double2scm (him->extent (him,a).center ());
-}
+ Direction dir = get_grob_direction (me);
+ Real o = scm_to_double (general_side_position (me, a, true));
+ Interval iv = me->extent (me, a);
-void
-Side_position::add_staff_support (Grob*me)
-{
- Grob* st = Staff_symbol_referencer::staff_symbol_l (me);
- if (st)
+ if (!iv.is_empty ())
{
- add_support (me,st);
+ if (!dir)
+ {
+ programming_error ("direction unknown, but aligned-side wanted");
+ dir = DOWN;
+ }
+ o += -iv[-dir];
}
-}
-
-void
-Side_position::set_axis (Grob*me, Axis a)
-{
- me->add_offset_callback (Side_position::aligned_side_proc, a);
-}
-
-
-
-// ugh. doesn't cactch all variants.
-Axis
-Side_position::get_axis (Grob*me)
-{
- if (me->has_offset_callback_b (Side_position::aligned_side_proc, X_AXIS)
- || me->has_offset_callback_b (Side_position::aligned_side_proc , X_AXIS))
- return X_AXIS;
-
- return Y_AXIS;
-}
+ /*
+ Maintain a minimum distance to the staff. This is similar to side
+ position with padding, but it will put adjoining objects on a row if
+ stuff sticks out of the staff a little.
+ */
+ Grob *staff = Staff_symbol_referencer::get_staff_symbol (me);
+ if (staff && a == Y_AXIS)
+ {
+ if (to_boolean (me->get_property ("quantize-position")))
+ {
+ Grob *common = me->common_refpoint (staff, Y_AXIS);
+ Real my_off = me->relative_coordinate (common, Y_AXIS);
+ Real staff_off = staff->relative_coordinate (common, Y_AXIS);
+ Real ss = Staff_symbol::staff_space (staff);
+ Real position = 2 * (my_off + o - staff_off) / ss;
+ Real rounded = directed_round (position, dir);
+ Grob *head = me->get_parent (X_AXIS);
+
+ if (rounded <= Staff_symbol_referencer::staff_radius (me)
+ || (Note_head::has_interface (head)
+ && sign (Staff_symbol_referencer::get_position (head)) == - dir))
+ {
+ o += dir *(rounded - position) * 0.5 * ss;
+ if (Staff_symbol_referencer::on_staffline (me, int (rounded)))
+ o += dir * 0.5 * ss;
+ }
+ }
+ else if (scm_is_number (me->get_property ("staff-padding")))
+ {
+ Real padding
+ = Staff_symbol_referencer::staff_space (me)
+ * scm_to_double (me->get_property ("staff-padding"));
-void
-Side_position::set_direction (Grob*me, Direction d)
-{
- me->set_grob_property ("direction", gh_int2scm (d));
-}
+ Grob *common = me->common_refpoint (staff, Y_AXIS);
-void
-Side_position::set_minimum_space (Grob*me, Real m)
-{
- me->set_grob_property ("minimum-space", gh_double2scm (m));
+ Interval staff_size = staff->extent (common, Y_AXIS);
+ Real diff = dir*staff_size[dir] + padding - dir * (o + iv[-dir]);
+ o += dir * max (diff, 0.0);
+ }
+ }
+ return scm_from_double (o);
}
void
-Side_position::set_padding (Grob*me, Real p)
-{
- me->set_grob_property ("padding", gh_double2scm (p));
-}
-
-bool
-Side_position::has_interface (Grob*me)
+Side_position_interface::set_axis (Grob *me, Axis a)
{
- return me->has_interface (ly_symbol2scm ("side-position-interface"));
+ add_offset_callback (me,
+ (a==X_AXIS)
+ ? x_aligned_side_proc
+ : y_aligned_side_proc,
+ a);
}
-bool
-Side_position::supported_b (Grob*me)
+// ugh. doesn't catch all variants.
+Axis
+Side_position_interface::get_axis (Grob *me)
{
- SCM s = me->get_grob_property ("side-support-elements");
- return gh_pair_p(s);
-}
-
-
+ if (me->get_property_data (ly_symbol2scm ("X-offset"))
+ == Side_position_interface::x_aligned_side_proc)
+ return X_AXIS;
+ else if (me->get_property_data (ly_symbol2scm ("Y-offset"))
+ == Side_position_interface::y_aligned_side_proc)
+ return Y_AXIS;
+
+ return NO_AXES;
+}
+
+ADD_INTERFACE (Side_position_interface, "side-position-interface",
+ "Position a victim object (this one) next to other objects (the "
+ "support). The property @code{direction} signifies where to put the "
+ "victim object relative to the support (left or right, up or down?)\n\n "
+ "The routine also takes the size the staff into account if "
+ "@code{staff-padding} is set. If undefined, the staff symbol is ignored.",
+
+ /* properties */
+ "direction "
+ "direction-source "
+ "minimum-space "
+ "padding "
+ "side-relative-direction "
+ "side-support-elements "
+ "slur-padding "
+ "staff-padding "
+ "quantize-position "
+ );
projects / lilypond.git / blobdiff