source file of the GNU LilyPond music typesetter
- (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "grob.hh"
#include <cstring>
-#include "main.hh"
-#include "input-smob.hh"
-#include "warn.hh"
-#include "pointer-group-interface.hh"
-#include "misc.hh"
-#include "paper-score.hh"
-#include "stencil.hh"
-#include "warn.hh"
-#include "system.hh"
+#include "align-interface.hh"
+#include "input.hh"
+#include "international.hh"
#include "item.hh"
-#include "stencil.hh"
+#include "main.hh"
#include "misc.hh"
#include "music.hh"
-#include "item.hh"
-#include "paper-score.hh"
-#include "ly-smobs.icc"
#include "output-def.hh"
+#include "pointer-group-interface.hh"
+#include "stencil.hh"
+#include "stream-event.hh"
+#include "system.hh"
+#include "warn.hh"
-MAKE_SCHEME_CALLBACK(Grob, same_axis_parent_positioning, 2);
-SCM
-Grob::same_axis_parent_positioning (SCM element_smob, SCM axis)
-{
- Grob *me = unsmob_grob (element_smob);
- Axis ax = Axis (scm_to_int (axis));
-
- Grob *par = me->get_parent (ax);
- if (par)
- par->get_property ("positioning-done");
-
- return scm_from_double (0.0);
-}
-
-MAKE_SCHEME_CALLBACK(Grob,other_axis_parent_positioning, 2);
-SCM
-Grob::other_axis_parent_positioning (SCM element_smob, SCM axis)
-{
- Grob *me = unsmob_grob (element_smob);
- Axis ax = other_axis ((Axis) scm_to_int (axis));
-
- Grob *par = me->get_parent (ax);
- if (par)
- par->get_property ("positioning-done");
-
- return scm_from_double (0.0);
-}
-
-
+#include "ly-smobs.icc"
Grob *
-Grob::clone (int count) const
+Grob::clone () const
{
- return new Grob (*this, count);
+ return new Grob (*this);
}
-/* TODO:
-
-- remove dynamic_cast<Spanner, Item> and put this code into respective
-subclass. */
-
-#define HASH_SIZE 3
-#define INFINITY_MSG "Infinity or NaN encountered"
-
-Grob::Grob (SCM basicprops,
- Object_key const *key)
+Grob::Grob (SCM basicprops)
{
- key_ = key;
+
/* FIXME: default should be no callback. */
self_scm_ = SCM_EOL;
- pscore_ = 0;
- status_ = 0;
+ layout_ = 0;
original_ = 0;
interfaces_ = SCM_EOL;
immutable_property_alist_ = basicprops;
mutable_property_alist_ = SCM_EOL;
object_alist_ = SCM_EOL;
- property_callbacks_ = SCM_EOL;
/* We do smobify_self () as the first step. Since the object lives
on the heap, none of its SCM variables are protected from
GC. After smobify_self (), they are. */
smobify_self ();
- /*
- We always get a new key object for a new grob.
- */
- if (key_)
- ((Object_key *)key_)->unprotect ();
-
SCM meta = get_property ("meta");
if (scm_is_pair (meta))
- interfaces_ = scm_cdr (scm_assoc (ly_symbol2scm ("interfaces"), meta));
-
- /* TODO:
-
- - destill this into a function, so we can re-init the immutable
- properties with a new BASICPROPS value after
- creation. Convenient eg. when using \override with
- StaffSymbol. */
-
- property_callbacks_ = get_property ("callbacks");
-
- SCM off_callbacks[] = {
- get_property ("X-offset-callbacks"),
- get_property ("Y-offset-callbacks")
- };
- SCM extents[] = {
- get_property ("X-extent"),
- get_property ("Y-extent")
- };
- SCM extent_callbacks[] = {
- get_property ("X-extent-callback"),
- get_property ("Y-extent-callback")
- };
-
- for (int a = X_AXIS; a <= Y_AXIS; a++)
{
- SCM l = off_callbacks[a];
+ interfaces_ = scm_cdr (scm_assq (ly_symbol2scm ("interfaces"), meta));
- if (scm_ilength (l) >= 0)
+ SCM object_cbs = scm_assq (ly_symbol2scm ("object-callbacks"), meta);
+ if (scm_is_pair (object_cbs))
{
- dim_cache_[a].offset_callbacks_ = l;
- dim_cache_[a].offsets_left_ = scm_ilength (l);
+ for (SCM s = scm_cdr (object_cbs); scm_is_pair (s); s = scm_cdr (s))
+ set_object (scm_caar (s), scm_cdar (s));
}
- else
- programming_error ("[XY]-offset-callbacks must be a list");
-
- SCM cb = extent_callbacks[a];
- if (cb == SCM_BOOL_F)
- dim_cache_[a].dimension_ = SCM_BOOL_F;
-
- SCM xt = extents[a];
- if (is_number_pair (xt))
- dim_cache_[a].dimension_ = xt;
- else if (ly_is_procedure (cb))
- dim_cache_[a].dimension_callback_ = cb;
- else if (cb == SCM_EOL
- && ly_is_procedure (ly_assoc_get (ly_symbol2scm ("stencil"),
- property_callbacks_, SCM_BOOL_F)))
- dim_cache_[a].dimension_callback_ = stencil_extent_proc;
}
-
+
+ if (get_property_data ("X-extent") == SCM_EOL)
+ set_property ("X-extent", Grob::stencil_width_proc);
+ if (get_property_data ("Y-extent") == SCM_EOL)
+ set_property ("Y-extent", Grob::stencil_height_proc);
}
-Grob::Grob (Grob const &s, int copy_index)
+Grob::Grob (Grob const &s)
: dim_cache_ (s.dim_cache_)
{
- key_ = (use_object_keys) ? new Copied_key (s.key_, copy_index) : 0;
original_ = (Grob *) & s;
self_scm_ = SCM_EOL;
immutable_property_alist_ = s.immutable_property_alist_;
mutable_property_alist_ = ly_deep_copy (s.mutable_property_alist_);
interfaces_ = s.interfaces_;
- property_callbacks_ = s.property_callbacks_;
object_alist_ = SCM_EOL;
- pscore_ = 0;
+ layout_ = 0;
smobify_self ();
- if (key_)
- ((Object_key *)key_)->unprotect ();
}
Grob::~Grob ()
{
}
-
-MAKE_SCHEME_CALLBACK (Grob, stencil_extent, 2);
-SCM
-Grob::stencil_extent (SCM element_smob, SCM scm_axis)
-{
- Grob *s = unsmob_grob (element_smob);
- Axis a = (Axis) scm_to_int (scm_axis);
-
- Stencil *m = s->get_stencil ();
- Interval e;
- if (m)
- e = m->extent (a);
- return ly_interval2scm (e);
-}
-
-Interval
-robust_relative_extent (Grob *me, Grob *refp, Axis a)
-{
- Interval ext = me->extent (refp, a);
- if (ext.is_empty ())
- ext.add_point (me->relative_coordinate (refp, a));
-
- return ext;
-}
-
-Output_def *
-Grob::get_layout () const
-{
- return pscore_ ? pscore_->layout () : 0;
-}
+/****************************************************************
+ STENCILS
+****************************************************************/
Stencil *
Grob::get_stencil () const
else
{
SCM expr = m->expr ();
- if (point_and_click_global)
- expr = scm_list_3 (ly_symbol2scm ("grob-cause"), self_scm (), expr);
+ expr = scm_list_3 (ly_symbol2scm ("grob-cause"),
+ self_scm (), expr);
retval = Stencil (m->extent_box (), expr);
}
+ SCM rot = get_property ("rotation");
+ if (scm_is_pair (rot))
+ {
+ Real angle = scm_to_double (scm_car (rot));
+ Real x = scm_to_double (scm_cadr (rot));
+ Real y = scm_to_double (scm_caddr (rot));
+
+ retval.rotate_degrees (angle, Offset (x, y));
+ }
+
/* color support... see interpret_stencil_expression () for more... */
SCM color = get_property ("color");
- if (color != SCM_EOL)
+ if (scm_is_pair (color))
{
- m = unsmob_stencil (stil);
SCM expr = scm_list_3 (ly_symbol2scm ("color"),
color,
- m->expr ());
+ retval.expr ());
- retval = Stencil (m->extent_box (), expr);
+ retval = Stencil (retval.extent_box (), expr);
}
}
return retval;
}
-/*
+/****************************************************************
VIRTUAL STUBS
-*/
+****************************************************************/
void
Grob::do_break_processing ()
{
}
+void
+Grob::discretionary_processing ()
+{
+}
+
System *
Grob::get_system () const
{
Grob::handle_broken_dependencies ()
{
Spanner *sp = dynamic_cast<Spanner *> (this);
- if (original_ && sp)
+ if (original () && sp)
return;
if (sp)
if (!is_live ())
return;
+ for (int a = X_AXIS; a < NO_AXES; a++)
+ dim_cache_[a].clear ();
+
mutable_property_alist_ = SCM_EOL;
object_alist_ = SCM_EOL;
- property_callbacks_ = SCM_EOL;
immutable_property_alist_ = SCM_EOL;
interfaces_ = SCM_EOL;
-
- set_extent (SCM_EOL, Y_AXIS);
- set_extent (SCM_EOL, X_AXIS);
-
- set_extent_callback (SCM_EOL, Y_AXIS);
- set_extent_callback (SCM_EOL, X_AXIS);
-
- for (int a = X_AXIS; a <= Y_AXIS; a++)
- {
- dim_cache_[a].offset_callbacks_ = SCM_EOL;
- dim_cache_[a].offsets_left_ = 0;
- }
}
void
{
/* Don't do this in the derived method, since we want to keep access to
object_alist_ centralized. */
- if (original_)
+ if (original ())
{
Item *it = dynamic_cast<Item *> (this);
substitute_object_links (scm_from_int (it->break_status_dir ()),
- original_->object_alist_);
+ original ()->object_alist_);
}
}
return 0;
}
-/* Translate in one direction. */
+/****************************************************************
+ OFFSETS
+****************************************************************/
+
void
Grob::translate_axis (Real y, Axis a)
{
if (isinf (y) || isnan (y))
- programming_error (_ (INFINITY_MSG));
+ {
+ programming_error (_ ("Infinity or NaN encountered"));
+ return ;
+ }
+
+ if (!dim_cache_[a].offset_)
+ dim_cache_[a].offset_ = new Real (y);
else
- dim_cache_[a].offset_ += y;
+ *dim_cache_[a].offset_ += y;
}
/* Find the offset relative to D. If D equals THIS, then it is 0.
Real
Grob::relative_coordinate (Grob const *refp, Axis a) const
{
- if (refp == this)
+ /* eaa - hmmm, should we do a programming_error() here? */
+ if ((this == NULL) || (refp == this))
return 0.0;
/* We catch PARENT_L_ == nil case with this, but we crash if we did
not ask for the absolute coordinate (ie. REFP == nil.) */
+ Real off = get_offset (a);
if (refp == dim_cache_[a].parent_)
- return get_offset (a);
+ return off;
+
+ off += dim_cache_[a].parent_->relative_coordinate (refp, a);
- return get_offset (a) + dim_cache_[a].parent_->relative_coordinate (refp, a);
+ return off;
+}
+
+Real
+Grob::pure_relative_y_coordinate (Grob const *refp, int start, int end)
+{
+ if (refp == this)
+ return 0.0;
+
+ Real off = 0;
+
+ if (dim_cache_[Y_AXIS].offset_)
+ {
+ if (to_boolean (get_property ("pure-Y-offset-in-progress")))
+ programming_error ("cyclic chain in pure-Y-offset callbacks");
+
+ off = *dim_cache_[Y_AXIS].offset_;
+ }
+ else
+ {
+ SCM proc = get_property_data ("Y-offset");
+
+ dim_cache_[Y_AXIS].offset_ = new Real (0.0);
+ set_property ("pure-Y-offset-in-progress", SCM_BOOL_T);
+ off = robust_scm2double (call_pure_function (proc,
+ scm_list_1 (self_scm ()),
+ start, end),
+ 0.0);
+ del_property ("pure-Y-offset-in-progress");
+ delete dim_cache_[Y_AXIS].offset_;
+ dim_cache_[Y_AXIS].offset_ = 0;
+ }
+
+ /* we simulate positioning-done if we are the child of a VerticalAlignment,
+ but only if we don't have a cached offset. If we do have a cached offset,
+ it probably means that the Alignment was fixed and it has already been
+ calculated.
+ */
+ if (Grob *p = get_parent (Y_AXIS))
+ {
+ Real trans = 0;
+ if (Align_interface::has_interface (p) && !dim_cache_[Y_AXIS].offset_)
+ trans = Align_interface::get_pure_child_y_translation (p, this, start, end);
+
+ return off + trans + p->pure_relative_y_coordinate (refp, start, end);
+ }
+ return off;
}
/* Invoke callbacks to get offset relative to parent. */
Real
Grob::get_offset (Axis a) const
{
+ if (dim_cache_[a].offset_)
+ return *dim_cache_[a].offset_;
+
Grob *me = (Grob *) this;
- while (dim_cache_[a].offsets_left_)
- {
- int l = --me->dim_cache_[a].offsets_left_;
- SCM cb = scm_list_ref (dim_cache_[a].offset_callbacks_, scm_from_int (l));
- SCM retval = scm_call_2 (cb, self_scm (), scm_from_int (a));
- Real r = scm_to_double (retval);
- if (isinf (r) || isnan (r))
- {
- programming_error (INFINITY_MSG);
- r = 0.0;
- }
- me->dim_cache_[a].offset_ += r;
+ SCM sym = axis_offset_symbol (a);
+ me->dim_cache_[a].offset_ = new Real (0.0);
+
+ /*
+ UGH: can't fold next 2 statements together. Apparently GCC thinks
+ dim_cache_[a].offset_ is unaliased.
+ */
+ Real off = robust_scm2double (internal_get_property (sym), 0.0);
+ if (me->dim_cache_[a].offset_)
+ {
+ *me->dim_cache_[a].offset_ += off;
+ me->del_property (sym);
+ return *me->dim_cache_[a].offset_;
}
- return dim_cache_[a].offset_;
+ else
+ return 0.0;
}
-bool
-Grob::is_empty (Axis a) const
+Real
+Grob::maybe_pure_coordinate (Grob const *refp, Axis a, bool pure, int start, int end)
{
- return !(scm_is_pair (dim_cache_[a].dimension_)
- || ly_is_procedure (dim_cache_[a].dimension_callback_));
+ if (pure && a != Y_AXIS)
+ programming_error ("tried to get pure X-offset");
+ return (pure && a == Y_AXIS) ? pure_relative_y_coordinate (refp, start, end)
+ : relative_coordinate (refp, a);
}
+/****************************************************************
+ extents
+****************************************************************/
+
void
Grob::flush_extent_cache (Axis axis)
{
- Dimension_cache *d = &dim_cache_[axis];
- if (ly_is_procedure (d->dimension_callback_)
- && scm_is_pair (d->dimension_))
+ if (dim_cache_[axis].extent_)
{
- d->dimension_ = SCM_EOL;
-
+ /*
+ Ugh, this is not accurate; will flush property, causing
+ callback to be called if.
+ */
+ del_property ((axis == X_AXIS) ? ly_symbol2scm ("X-extent") : ly_symbol2scm ("Y-extent"));
+ delete dim_cache_[axis].extent_;
+ dim_cache_[axis].extent_ = 0;
if (get_parent (axis))
get_parent (axis)->flush_extent_cache (axis);
}
}
+
Interval
Grob::extent (Grob *refp, Axis a) const
{
- Real x = relative_coordinate (refp, a);
-
- Dimension_cache *d = (Dimension_cache *) & dim_cache_[a];
- Interval ext;
-
- SCM dimpair = d->dimension_;
- if (scm_is_pair (dimpair))
- ;
- else if (ly_is_procedure (d->dimension_callback_)
- && d->dimension_ == SCM_EOL)
- d->dimension_ = scm_call_2 (d->dimension_callback_, self_scm (), scm_from_int (a));
+ Real offset = relative_coordinate (refp, a);
+ Interval real_ext;
+ if (dim_cache_[a].extent_)
+ {
+ real_ext = *dim_cache_[a].extent_;
+ }
else
- return ext;
-
- if (!scm_is_pair (d->dimension_))
- return ext;
-
- ext = ly_scm2interval (d->dimension_);
-
- SCM extra = (a == X_AXIS)
- ? get_property ("extra-X-extent")
- : get_property ("extra-Y-extent");
-
- /* Signs ? */
- if (scm_is_pair (extra))
{
- ext[BIGGER] += scm_to_double (scm_cdr (extra));
- ext[SMALLER] += scm_to_double (scm_car (extra));
+ /*
+ Order is significant: ?-extent may trigger suicide.
+ */
+ SCM ext_sym =
+ (a == X_AXIS)
+ ? ly_symbol2scm ("X-extent")
+ : ly_symbol2scm ("Y-extent");
+
+ SCM ext = internal_get_property (ext_sym);
+ if (is_number_pair (ext))
+ real_ext.unite (ly_scm2interval (ext));
+
+ SCM min_ext_sym =
+ (a == X_AXIS)
+ ? ly_symbol2scm ("minimum-X-extent")
+ : ly_symbol2scm ("minimum-Y-extent");
+ SCM min_ext = internal_get_property (min_ext_sym);
+ if (is_number_pair (min_ext))
+ real_ext.unite (ly_scm2interval (min_ext));
+
+ ((Grob*)this)->dim_cache_[a].extent_ = new Interval (real_ext);
}
+
+ real_ext.translate (offset);
+
+ return real_ext;
+}
- extra = (a == X_AXIS)
- ? get_property ("minimum-X-extent")
- : get_property ("minimum-Y-extent");
+Interval
+Grob::pure_height (Grob *refp, int start, int end)
+{
+ SCM proc = get_property_data (ly_symbol2scm ("Y-extent"));
+ SCM iv_scm = call_pure_function (proc,
+ scm_list_1 (self_scm ()),
+ start, end);
+ Interval iv = robust_scm2interval (iv_scm, Interval (0, 0));
+ Real offset = pure_relative_y_coordinate (refp, start, end);
- if (scm_is_pair (extra))
- ext.unite (Interval (scm_to_double (scm_car (extra)),
- scm_to_double (scm_cdr (extra))));
+ SCM min_ext = get_property ("minimum-Y-extent");
- ext.translate (x);
+ /* we don't add minimum-Y-extent if the extent is empty. This solves
+ a problem with Hara-kiri spanners. They would request_suicide and
+ return empty extents, but we would force them here to be large. */
+ if (!iv.is_empty () && is_number_pair (min_ext))
+ iv.unite (ly_scm2interval (min_ext));
- return ext;
+ if (!iv.is_empty ())
+ iv.translate (offset);
+ return iv;
+}
+
+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);
+}
+
+Interval_t<int>
+Grob::spanned_rank_interval () const
+{
+ return Interval_t<int> (-1, 0);
}
+/****************************************************************
+ REFPOINTS
+****************************************************************/
+
/* Find the group-element which has both #this# and #s# */
Grob *
Grob::common_refpoint (Grob const *s, Axis a) const
return 0;
}
-Grob *
-common_refpoint_of_list (SCM elist, Grob *common, Axis a)
-{
- for (; scm_is_pair (elist); elist = scm_cdr (elist))
- if (Grob *s = unsmob_grob (scm_car (elist)))
- {
- if (common)
- common = common->common_refpoint (s, a);
- else
- common = s;
- }
-
- return common;
-}
-
-Grob *
-common_refpoint_of_array (Link_array<Grob> const &arr, Grob *common, Axis a)
-{
- for (int i = arr.size (); i--;)
- if (Grob *s = arr[i])
- {
- if (common)
- common = common->common_refpoint (s, a);
- else
- common = s;
- }
-
- return common;
-}
-
-String
-Grob::name () const
-{
- SCM meta = get_property ("meta");
- SCM nm = scm_assoc (ly_symbol2scm ("name"), meta);
- nm = (scm_is_pair (nm)) ? scm_cdr (nm) : SCM_EOL;
- return scm_is_symbol (nm) ? ly_symbol2string (nm) : this->class_name ();
-}
-
void
-Grob::add_offset_callback (SCM cb, Axis a)
-{
- if (!has_offset_callback (cb, a))
- {
- dim_cache_[a].offset_callbacks_
- = scm_cons (cb, dim_cache_[a].offset_callbacks_);
- dim_cache_[a].offsets_left_++;
- }
-}
-
-bool
-Grob::has_extent_callback (SCM cb, Axis a) const
-{
- return scm_equal_p (cb, dim_cache_[a].dimension_callback_) == SCM_BOOL_T;
-}
-
-bool
-Grob::has_offset_callback (SCM cb, Axis a) const
-{
- return scm_c_memq (cb, dim_cache_[a].offset_callbacks_) != SCM_BOOL_F;
-}
-
-void
-Grob::set_extent (SCM dc, Axis a)
+Grob::set_parent (Grob *g, Axis a)
{
- dim_cache_[a].dimension_ = dc;
+ dim_cache_[a].parent_ = g;
}
-void
-Grob::set_extent_callback (SCM dc, Axis a)
+Grob *
+Grob::get_parent (Axis a) const
{
- dim_cache_[a].dimension_callback_ = dc;
+ return dim_cache_[a].parent_;
}
-void
-Grob::set_parent (Grob *g, Axis a)
-{
- dim_cache_[a].parent_ = g;
-}
void
Grob::fixup_refpoint ()
}
}
+
+/****************************************************************
+ MESSAGES
+****************************************************************/
void
-Grob::warning (String s) const
+Grob::warning (string s) const
{
SCM cause = self_scm ();
while (Grob *g = unsmob_grob (cause))
cause = g->get_property ("cause");
+ /* ES TODO: cause can't be Music*/
if (Music *m = unsmob_music (cause))
m->origin ()->warning (s);
+ else if (Stream_event *ev = unsmob_stream_event (cause))
+ ev->origin ()->warning (s);
else
::warning (s);
}
+
+string
+Grob::name () const
+{
+ SCM meta = get_property ("meta");
+ SCM nm = scm_assq (ly_symbol2scm ("name"), meta);
+ nm = (scm_is_pair (nm)) ? scm_cdr (nm) : SCM_EOL;
+ return scm_is_symbol (nm) ? ly_symbol2string (nm) : this->class_name ();
+}
+
void
-Grob::programming_error (String s) const
+Grob::programming_error (string s) const
{
SCM cause = self_scm ();
while (Grob *g = unsmob_grob (cause))
s = _f ("programming error: %s", s);
+ /* ES TODO: cause can't be Music*/
if (Music *m = unsmob_music (cause))
m->origin ()->message (s);
+ else if (Stream_event *ev = unsmob_stream_event (cause))
+ ev->origin ()->warning (s);
else
::message (s);
}
-void
-Grob::discretionary_processing ()
-{
-}
-
-bool
-Grob::internal_has_interface (SCM k)
-{
- return scm_c_memq (k, interfaces_) != SCM_BOOL_F;
-}
-Grob *
-Grob::get_parent (Axis a) const
-{
- return dim_cache_[a].parent_;
-}
-/** Return Array of Grobs in SCM list LST */
-Link_array<Grob>
-ly_scm2grobs (SCM lst)
-{
- Link_array<Grob> arr;
-
- for (SCM s = lst; scm_is_pair (s); s = scm_cdr (s))
- {
- SCM e = scm_car (s);
- arr.push (unsmob_grob (e));
- }
-
- arr.reverse ();
- return arr;
-}
-
-Object_key const *
-Grob::get_key () const
-{
- return key_;
-}
-
-/** Return SCM list of Grob array A */
-SCM
-ly_grobs2scm (Link_array<Grob> a)
-{
- SCM s = SCM_EOL;
- for (int i = a.size (); i; i--)
- s = scm_cons (a[i - 1]->self_scm (), s);
-
- return s;
-}
-
-ADD_INTERFACE (Grob, "grob-interface",
- "A grob represents a piece of music notation\n"
+ADD_INTERFACE (Grob,
+ "A grob represents a piece of music notation.\n"
+ "\n"
+ "All grobs have an X and Y@tie{}position on the page. These"
+ " X and Y@tie{}positions are stored in a relative format, thus"
+ " they can easily be combined by stacking them, hanging one"
+ " grob to the side of another, or coupling them into grouping"
+ " objects.\n"
"\n"
- "All grobs have an X and Y-position on the page. These X and Y positions\n"
- "are stored in a relative format, so they can easily be combined by\n"
- "stacking them, hanging one grob to the side of another, and coupling\n"
- "them into a grouping objects.\n"
+ "Each grob has a reference point (a.k.a.@: parent): The"
+ " position of a grob is stored relative to that reference"
+ " point. For example, the X@tie{}reference point of a staccato"
+ " dot usually is the note head that it applies to. When the"
+ " note head is moved, the staccato dot moves along"
+ " automatically.\n"
"\n"
- "Each grob has a reference point (a.k.a. parent): the position of a grob\n"
- "is stored relative to that reference point. For example the X-reference\n"
- "point of a staccato dot usually is the note head that it applies\n"
- "to. When the note head is moved, the staccato dot moves along\n"
- "automatically.\n"
+ "A grob is often associated with a symbol, but some grobs do"
+ " not print any symbols. They take care of grouping objects."
+ " For example, there is a separate grob that stacks staves"
+ " vertically. The @ref{NoteCollision} object is also an"
+ " abstract grob: It only moves around chords, but doesn't print"
+ " anything.\n"
"\n"
- "A grob is often associated with a symbol, but some grobs do not print\n"
- "any symbols. They take care of grouping objects. For example, there is a\n"
- "separate grob that stacks staves vertically. The @ref{NoteCollision}\n"
- "is also an abstract grob: it only moves around chords, but doesn't print\n"
- "anything.\n"
+ "Grobs have properties (Scheme variables) that can be read and"
+ " set. Two types of them exist: immutable and mutable."
+ " Immutable variables define the default style and behavior."
+ " They are shared between many objects. They can be changed"
+ " using @code{\\override} and @code{\\revert}. Mutable"
+ " properties are variables that are specific to one grob."
+ " Typically, lists of other objects, or results from"
+ " computations are stored in mutable properties. In"
+ " particular, every call to @code{set-grob-property} (or its"
+ " C++ equivalent) sets a mutable property.\n"
"\n"
- "Grobs have a properties: Scheme variables, that can be read and set. "
- "They have two types. Immutable variables "
- "define the default style and behavior. They are shared between many objects. "
- "They can be changed using @code{\\override} and @code{\\revert}. "
- "\n\n"
- "Mutable properties are variables that are specific to one grob. Typically, "
- "lists of other objects, or results from computations are stored in"
- "mutable properties: every call to set-grob-property (or its C++ equivalent) "
- "sets a mutable property. "
- "\n\n"
- "The properties @code{after-line-breaking} and @code{before-line-breaking} "
- "are dummies that are not user-serviceable. "
-
- ,
+ "The properties @code{after-line-breaking} and"
+ " @code{before-line-breaking} are dummies that are not"
+ " user-serviceable.",
/* properties */
"X-extent "
- "X-extent-callback "
- "X-offset-callbacks "
+ "X-offset "
"Y-extent "
- "Y-extent-callback "
- "Y-offset-callbacks "
+ "Y-offset "
"after-line-breaking "
+ "avoid-slur "
"axis-group-parent-X "
"axis-group-parent-Y "
"before-line-breaking "
- "callbacks "
"cause "
"color "
- "context "
+ "cross-staff "
"extra-X-extent "
"extra-Y-extent "
"extra-offset "
"meta "
"minimum-X-extent "
"minimum-Y-extent "
- "spacing-procedure "
+ "outside-staff-horizontal-padding "
+ "outside-staff-padding "
+ "outside-staff-priority "
+ "pure-Y-offset-in-progress "
+ "rotation "
+ "springs-and-rods "
"staff-symbol "
"stencil "
- "transparent"
+ "transparent "
);
+/****************************************************************
+ CALLBACKS
+****************************************************************/
+
+static SCM
+grob_stencil_extent (Grob *me, Axis a)
+{
+ Stencil *m = me->get_stencil ();
+ Interval e;
+ if (m)
+ e = m->extent (a);
+ return ly_interval2scm (e);
+}
+
+
+MAKE_SCHEME_CALLBACK (Grob, stencil_height, 1);
+SCM
+Grob::stencil_height (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ return grob_stencil_extent (me, Y_AXIS);
+}
+
+MAKE_SCHEME_CALLBACK (Grob, y_parent_positioning, 1);
+SCM
+Grob::y_parent_positioning (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ Grob *par = me->get_parent (Y_AXIS);
+ if (par)
+ (void) par->get_property ("positioning-done");
+
+ return scm_from_double (0.0);
+}
+
+
+MAKE_SCHEME_CALLBACK (Grob, x_parent_positioning, 1);
+SCM
+Grob::x_parent_positioning (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+
+ Grob *par = me->get_parent (X_AXIS);
+ if (par)
+ (void) par->get_property ("positioning-done");
+
+ return scm_from_double (0.0);
+}
+
+MAKE_SCHEME_CALLBACK (Grob, stencil_width, 1);
+SCM
+Grob::stencil_width (SCM smob)
+{
+ Grob *me = unsmob_grob (smob);
+ return grob_stencil_extent (me, X_AXIS);
+}
+
+
+
+Grob *
+common_refpoint_of_list (SCM elist, Grob *common, Axis a)
+{
+ for (; scm_is_pair (elist); elist = scm_cdr (elist))
+ if (Grob *s = unsmob_grob (scm_car (elist)))
+ {
+ if (common)
+ common = common->common_refpoint (s, a);
+ else
+ common = s;
+ }
+
+ return common;
+}
+
+Grob *
+common_refpoint_of_array (vector<Grob*> const &arr, Grob *common, Axis a)
+{
+ for (vsize i = 0; i < arr.size (); i++)
+ if (common)
+ common = common->common_refpoint (arr[i], a);
+ else
+ common = arr[i];
+
+ return common;
+}
+
+Interval
+robust_relative_extent (Grob *me, Grob *refpoint, Axis a)
+{
+ Interval ext = me->extent (refpoint, a);
+ if (ext.is_empty ())
+ ext.add_point (me->relative_coordinate (refpoint, a));
+
+ return ext;
+}
projects / lilypond.git / blobdiff