+/*
+ self-alignment-interface.cc
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
+
#include "self-alignment-interface.hh"
#include "warn.hh"
-/*
- Position centered on parent.
- */
-MAKE_SCHEME_CALLBACK (Self_alignment_interface,centered_on_parent,2);
+/* Position centered on parent. */
+MAKE_SCHEME_CALLBACK (Self_alignment_interface, centered_on_parent, 2);
SCM
Self_alignment_interface::centered_on_parent (SCM element_smob, SCM axis)
{
Grob *me = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
+ Axis a = (Axis) scm_to_int (axis);
Grob *him = me->get_parent (a);
- Interval he = him->extent (him,a);
+ Interval he = him->extent (him, a);
- return gh_double2scm (he.is_empty () ? 0.0 : he.center ());
+ return scm_make_real (he.is_empty () ? 0.0 : he.center ());
}
-MAKE_SCHEME_CALLBACK (Self_alignment_interface,aligned_on_parent,2);
+MAKE_SCHEME_CALLBACK (Self_alignment_interface, aligned_on_parent, 2);
SCM
Self_alignment_interface::aligned_on_parent (SCM element_smob, SCM axis)
{
Grob *me = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
+ Axis a = (Axis) scm_to_int (axis);
Grob *him = me->get_parent (a);
- Interval he = him->extent (him,a);
+ Interval he = him->extent (him, a);
- SCM sym= (a == X_AXIS) ? ly_symbol2scm ("self-alignment-X"): ly_symbol2scm ("self-alignment-Y");
- SCM align_prop (me->internal_get_grob_property (sym));
+ SCM sym= (a == X_AXIS) ? ly_symbol2scm ("self-alignment-X")
+ : ly_symbol2scm ("self-alignment-Y");
+ SCM align_prop (me->internal_get_property (sym));
- if (!gh_number_p (align_prop))
- return gh_int2scm (0);
+ if (!scm_is_number (align_prop))
+ return scm_int2num (0);
Real x = 0.0;
-
- Real align = gh_scm2double (align_prop);
+ Real align = scm_to_double (align_prop);
- Interval ext (me->extent (me,a));
+ Interval ext (me->extent (me, a));
if (ext.is_empty ())
- {
- programming_error ("I'm empty. Can't align on self");
-
- }
+ programming_error ("I'm empty. Can't align on self");
else
x -= ext.linear_combination (align) ;
if (!he.is_empty ())
- {
- x += he.linear_combination (align);
- }
+ x += he.linear_combination (align);
- return gh_double2scm (x);
+ return scm_make_real (x);
}
-/*
- Position centered on parent.
- */
-MAKE_SCHEME_CALLBACK (Self_alignment_interface,centered_on_other_axis_parent,2);
+/* Position centered on parent. */
+MAKE_SCHEME_CALLBACK (Self_alignment_interface, centered_on_other_axis_parent, 2);
SCM
-Self_alignment_interface::centered_on_other_axis_parent (SCM element_smob,
+Self_alignment_interface::centered_on_other_axis_parent (SCM element_smob,
SCM axis)
{
Grob *me = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
+ Axis a = (Axis) scm_to_int (axis);
Grob *him = me->get_parent (other_axis (a));
- Interval he = him->extent (him,a);
+ Interval he = him->extent (him, a);
- return gh_double2scm (he.is_empty () ? 0.0 : he.center ());
+ return scm_make_real (he.is_empty () ? 0.0 : he.center ());
}
-
-
-
-/**
- callback that centers the element on itself
-
- Requires that self-alignment-{X,Y} be set.
- */
-MAKE_SCHEME_CALLBACK (Self_alignment_interface,aligned_on_self,2);
+/** callback that centers the element on itself
+ Requires that self-alignment-{X, Y} be set. */
+MAKE_SCHEME_CALLBACK (Self_alignment_interface, aligned_on_self, 2);
SCM
Self_alignment_interface::aligned_on_self (SCM element_smob, SCM axis)
{
Grob *me = unsmob_grob (element_smob);
- Axis a = (Axis) gh_scm2int (axis);
+ Axis a = (Axis) scm_to_int (axis);
- SCM sym= (a == X_AXIS) ? ly_symbol2scm ("self-alignment-X"): ly_symbol2scm ("self-alignment-Y");
+ SCM sym= (a == X_AXIS) ? ly_symbol2scm ("self-alignment-X")
+ : ly_symbol2scm ("self-alignment-Y");
- SCM align (me->internal_get_grob_property (sym));
- if (gh_number_p (align))
+ SCM align (me->internal_get_property (sym));
+ if (scm_is_number (align))
{
- Interval ext (me->extent (me,a));
-
+ Interval ext (me->extent (me, a));
if (ext.is_empty ())
- {
- programming_error ("I'm empty. Can't align on self");
- return gh_double2scm (0.0);
- }
+ programming_error ("I'm empty. Can't align on self");
else
- {
- return gh_double2scm (- ext.linear_combination (gh_scm2double (align)));
- }
- }
- else if (unsmob_grob (align))
- {
- return gh_double2scm (- unsmob_grob (align)->relative_coordinate (me, a));
+ return scm_make_real (- ext.linear_combination (scm_to_double (align)));
}
- return gh_double2scm (0.0);
+ return scm_make_real (0.0);
}
ADD_INTERFACE (Self_alignment_interface, "self-alignment-interface",
- "Position self using some alignment",
- "self-alignment-X self-alignment-Y");
+ "Position this object on itself and/or on its parent. To this end, the following functions "
+ " are provided: \n"
+ "@table @code \n"
+ "@item Self_alignment_interface::aligned_on_self\n"
+ " Align self on reference point, using @code{self-alignment-X} and "
+ "@code{self-alignment-Y}."
+ "@item Self_alignment_interface::aligned_on_parent\n"
+ "@item Self_alignment_interface::centered_on_parent\n"
+ " Shift the object so its own reference point is centered on the "
+ " extent of the parent \n"
+ "@item Self_alignment_interface::centered_on_other_axis_parent\n"
+ " For X-axis, center on the Y-parent, and vice versa.\n "
+ "@end table\n",
+ "self-alignment-X self-alignment-Y");
projects / lilypond.git / blobdiff