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leadsheets.library.chords.code.tex
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% --------------------------------------------------------------------------
% the LEADSHEETS package
%
% typesetting leadsheets and songbooks
%
% --------------------------------------------------------------------------
% Clemens Niederberger
% E-Mail: [email protected]
% --------------------------------------------------------------------------
% Copyright 2014--2022 Clemens Niederberger
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
% of this license or (at your option) any later version.
% The latest version of this license is in
% http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%
% This work has the LPPL maintenance status `maintained'.
%
% The Current Maintainer of this work is Clemens Niederberger.
% --------------------------------------------------------------------------
\LeadsheetsExplLibrary{chords}{2016/07/02 printing chords}
\msg_new:nnn {leadsheets} {no-chords}
{ No~ more~ chords~ left~ for~ verse~ type~ `#1'~ \msg_line_context: }
\leadsheets_load_library:n {chordnames}
\bool_new:N \l__leadsheets_output_notation_german_bool
\bool_new:N \l__leadsheets_input_notation_german_bool
\tl_new:N \l__leadsheets_current_chord_tl
\tl_new:N \l__leadsheets_chord_stack_alignment_tl
\tl_set:Nn \l__leadsheets_chord_stack_alignment_tl {c}
\bool_new:N \l__leadsheets_smash_chords_bool
\bool_new:N \g__leadsheets_smash_next_chord_bool
\bool_new:N \l__leadsheets_chord_gobble_after_bool
\bool_new:N \l__leadsheets_record_chords_bool
\bool_new:N \l__leadsheets_chord_print_bool
\bool_set_true:N \l__leadsheets_chord_print_bool
\prop_new:N \g__leadsheets_chords_sequences_prop
\seq_new:N \g__leadsheets_chords_sequences_seq
\dim_new:N \l__leadsheets_empty_chord_dim
\dim_set:Nn \l__leadsheets_empty_chord_dim {1em}
\cs_new:Npn \leadsheets_chord_print:n #1 {#1}
\cs_generate_variant:Nn \leadsheets_chord_print:n {V}
\cs_new_protected:Npn \leadsheets_set_chord:nnn #1#2#3
{
\bool_if:NTF #1
{ \bool_set_true:N \l__leadsheets_chord_gobble_after_bool }
{ \bool_set_false:N \l__leadsheets_chord_gobble_after_bool }
\bool_if:NT #2
{ \bool_set_true:N \g__leadsheets_smash_next_chord_bool }
\__leadsheets_set_chord:nwn {#3}
}
\cs_new_protected:Npn \__leadsheets_set_chord:nwn #1#2~#3
{
\leadsheets_place_above:Vnn
\l__leadsheets_chord_stack_alignment_tl
{#1}
{
\tl_if_blank:nTF {#2}
{\skip_horizontal:N \l__leadsheets_empty_chord_dim}
{#2}
}
\tl_if_blank:nF {#3}
{ \bool_if:NF \l__leadsheets_chord_gobble_after_bool {\c_space_tl} }
#3
}
\cs_new_protected:Npn \leadsheets_chord:nnn #1#2#3
{
\leadsheets_if_record_chords:T
{ \seq_gput_right:Nn \g__leadsheets_chords_sequences_seq { {#3} } }
\leadsheets_set_chord:nnn
{#1}
{#2}
{ \leadsheets_chord_write:n {#3} }
}
\group_begin:
\cs_new_protected:Npn \leadsheets_chord_write:n
{
\group_begin:
\char_set_catcode_other:N \#
\char_set_catcode_active:N \^
\__leadsheets_chord_write:n
}
% for convenient input of sharps:
\char_set_catcode_other:N \#
% because ^ is active in the song environment:
\char_set_catcode_active:N \^
% # is other so we need another parameter character:
\char_set_catcode_parameter:N \?
\cs_new_protected:Npn \__leadsheets_chord_write:n ?1
{
\tl_set:Nn \l__leadsheets_current_chord_tl {?1}
% => convert to English input
\bool_if:NTF \l__leadsheets_input_notation_german_bool
{
\tl_replace_all:Nnn \l__leadsheets_current_chord_tl {B} {Bb}
\tl_replace_all:Nnn \l__leadsheets_current_chord_tl {H} {B}
}
{ \tl_replace_all:Nnn \l__leadsheets_current_chord_tl {H} {B} }
\leadsheets_if_library:nT {songs}
{
\bool_if:nT
{
\leadsheets_if_property_p:Vn \l_leadsheets_current_song_id_tl {key}
&&
( \l__leadsheets_transpose_bool || \l__leadsheets_transpose_capo_bool )
}
{
\leadsheets_transpose:xVN
{ \leadsheets_get_property:Vn \l_leadsheets_current_song_id_tl {key} }
\l__leadsheets_transpose_steps_int
\l__leadsheets_current_chord_tl
}
\bool_if:nTF
{
! \leadsheets_if_property_p:Vn \l_leadsheets_current_song_id_tl {key}
&&
( \l__leadsheets_transpose_bool || \l__leadsheets_transpose_capo_bool )
}
{
\msg_warning:nnV {leadsheets}
{transpose-key}
\l_leadsheets_current_song_id_tl
}
}
% => convert to specified output
\bool_if:NT \l__leadsheets_output_notation_german_bool
{
\tl_replace_all:Nnn \l__leadsheets_current_chord_tl {Bb} {@@@}
\tl_replace_all:Nnn \l__leadsheets_current_chord_tl {B} {H}
\tl_replace_all:Nnn \l__leadsheets_current_chord_tl {@@@} {B}
\tl_replace_all:Nnn \l__leadsheets_current_chord_tl {B#} {H}
}
% => this is \chordname initially:
\leadsheets_chord_print:V \l__leadsheets_current_chord_tl
\group_end:
}
\group_end:
\cs_generate_variant:Nn \leadsheets_chord_write:n { V }
\cs_new_protected:Npn \leadsheets_place_above:nnn #1#2#3
{
\bool_if:NTF \l__leadsheets_chord_print_bool
{
\group_begin:
\leadsheets_if_library:nT {songs}
{ \leadsheets_ignore_lines: }
\bool_if:NT \g__leadsheets_smash_next_chord_bool
{
\bool_set_true:N \l__leadsheets_smash_chords_bool
\bool_gset_false:N \g__leadsheets_smash_next_chord_bool
}
\linespread{1} \selectfont
\begin{tabular} [b] {@{}#1@{}}
\bool_if:NTF \l__leadsheets_smash_chords_bool
{\makebox[0pt][c]{#2}}
{#2} \\
#3
\end{tabular}
\group_end:
}
{#3}
}
\cs_generate_variant:Nn \leadsheets_place_above:nnn { V }
\keys_define:nn {leadsheets}
{
smash-chords .bool_set:N = \l__leadsheets_smash_chords_bool ,
smash-next-chord .bool_set:N = \g__leadsheets_smash_next_chord_bool ,
empty-chord-dim .dim_set:N = \l__leadsheets_empty_chord_dim ,
remember-chords .bool_set:N = \l__leadsheets_record_chords_bool ,
align-chords .tl_set:N = \l__leadsheets_chord_stack_alignment_tl ,
chord-cs .code:n =
\cs_set_protected:Npn \leadsheets_chord_print:n {#1} ,
chord-cs .initial:n = \chordname ,
print-chords .bool_set:N = \l__leadsheets_chord_print_bool ,
chords/output-notation .choice: ,
chords/output-notation/german .code:n =
\bool_set_true:N \l__leadsheets_output_notation_german_bool ,
chords/output-notation/english .code:n =
\bool_set_false:N \l__leadsheets_output_notation_german_bool ,
chords/input-notation .choice: ,
chords/input-notation/german .code:n =
\bool_set_true:N \l__leadsheets_input_notation_german_bool ,
chords/input-notation/english .code:n =
\bool_set_false:N \l__leadsheets_input_notation_german_bool
}
\NewDocumentCommand \chord {st-} { \leadsheets_chord:nnn {#1} {#2} }
\NewDocumentCommand \writechord {} { \leadsheets_chord_write:n }
% --------------------------------------------------------------------------
% record changes for a verse and automatically print them in the next:
\prg_new_conditional:Npnn \leadsheets_if_record_chords: {T,F,TF}
{
\bool_if:nTF
{
\l__leadsheets_record_chords_bool &&
! \prop_if_in_p:NV
\g__leadsheets_chords_sequences_prop
\l_leadsheets_verse_type_tl &&
!\l__leadsheets_measuring_bool
}
{ \prg_return_true: }
{ \prg_return_false: }
}
\prg_new_conditional:Npnn \leadsheets_if_recall_chords: {T,F,TF}
{
\bool_if:nTF
{
\l__leadsheets_record_chords_bool &&
\prop_if_in_p:NV
\g__leadsheets_chords_sequences_prop
\l_leadsheets_verse_type_tl
&&
!\l__leadsheets_measuring_bool
}
{ \prg_return_true: }
{ \prg_return_false: }
}
\cs_new_protected:Npn \leadsheets_recall_chord:nn #1#2
{
\seq_pop_left:NNF \g__leadsheets_chords_sequences_seq
\l__leadsheets_tmpa_tl
{ \msg_error:nnV {leadsheets} {no-chords} \l_leadsheets_verse_type_tl }
\leadsheets_set_chord:nnn
{#1}
{#2}
{ \leadsheets_chord_write:V \l__leadsheets_tmpa_tl }
}
\NewDocumentCommand \recallchord {st-}
{ \leadsheets_recall_chord:nn {#1} {#2} }
\NewDocumentCommand \getorprintchord {}
{
\leadsheets_if_recall_chords:TF
{ \recallchord }
{ \chord }
}
\file_input_stop:
HISTORY:
2014/08/10 - first version
2015/07/02 - input/output notation is done here now instead of in the
`chordnames' library so transposing works with either input
correctly
- options `input-notation' and `output-notation' now directly
belong to the `chords' library.
- this is now a user library
2016/07/02 - \getorprintchord