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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /macros/latex/contrib/tasks/tasks.sty
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+% --------------------------------------------------------------------------
+% the TASKS package
+%
+% Horizontal columned lists.
+%
+% --------------------------------------------------------------------------
+% Clemens Niederberger
+% Web: https://github.com/cgnieder/tasks/
+% E-Mail: contact@mychemistry.eu
+% --------------------------------------------------------------------------
+% Copyright 2013-2016 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.
+% --------------------------------------------------------------------------
+% If you have any ideas, questions, suggestions or bugs to report, please
+% feel free to contact me.
+% --------------------------------------------------------------------------
+\RequirePackage { expl3 , xparse , epic , cntformats , xtemplate , environ }
+\ExplSyntaxOn
+
+\tl_const:Nn \c_tasks_name_tl {tasks}
+\tl_const:Nn \c_tasks_date_tl {2016/08/13}
+\tl_const:Nn \c_tasks_version_tl {0.12}
+\tl_const:Nn \c_tasks_info_tl {Horizontal columned lists}
+
+\ProvidesExplPackage
+ {\c_tasks_name_tl}
+ {\c_tasks_date_tl}
+ {\c_tasks_version_tl}
+ {\c_tasks_info_tl \c_space_tl (CN)}
+
+% --------------------------------------------------------------------------
+% variants of kernel functions:
+\cs_generate_variant:Nn \tl_if_eq:nnTF { V }
+\cs_generate_variant:Nn \tl_if_eq:nnT { V }
+
+% --------------------------------------------------------------------------
+% variables:
+\seq_new:N \l__tasks_seq
+
+\int_new:N \l__tasks_depth_int
+\int_new:N \g__tasks_int
+\int_new:N \g__tasks_total_items_int
+\int_new:N \l__tasks_columns_int
+\int_new:N \l__tasks_rows_int
+\int_new:N \g__tasks_current_col_num_int
+\int_new:N \g__tasks_current_row_num_int
+\int_new:N \l__tasks_item_columns_int
+
+\bool_new:N \l__tasks_enumerate_bool
+\bool_new:N \l__tasks_resume_bool
+\bool_new:N \l__tasks_load_tasks_bool
+\bool_new:N \l__tasks_label_width_bool
+\bool_new:N \l__tasks_item_indent_bool
+\bool_new:N \l__tasks_label_offset_bool
+\bool_new:N \l__tasks_custom_label_bool
+\bool_new:N \l__tasks_custom_after_item_skip_bool
+\bool_new:N \l__tasks_debug_bool
+\bool_new:N \l__tasks_item_full_line_bool
+\bool_new:N \l__tasks_item_rest_of_line_bool
+
+\tl_new:N \l__tasks_instance_tl
+\tl_new:N \l__tasks_label_tl
+\tl_new:N \l__tasks_custom_label_tl
+\tl_new:N \l__tasks_label_pattern_tl
+\tl_new:N \l__tasks_custom_label_pattern_tl
+\tl_new:N \l__tasks_label_format_tl
+\tl_new:N \l__tasks_custom_label_format_tl
+\tl_new:N \l__tasks_item_format_tl
+\tl_new:N \l__tasks_custom_item_format_tl
+\tl_new:N \l__tasks_item_fill_left_tl
+\tl_new:N \l__tasks_item_fill_right_tl
+\tl_new:N \l__tasks_label_align_tl
+% \tl_new:N \task
+\tl_new:N \l__tasks_item_tl
+\tl_new:N \l__tasks_tmp_label_tl
+
+\dim_new:N \l__tasks_item_indent_dim
+\dim_new:N \l__tasks_item_default_indent_dim
+\dim_new:N \l__tasks_item_width_dim
+\dim_new:N \l__tasks_label_width_dim
+\dim_new:N \l__tasks_label_default_width_dim
+\dim_new:N \l__tasks_label_offset_dim
+\dim_new:N \l__tasks_label_default_offset_dim
+\dim_new:N \l__tasks_column_sep_dim
+
+\skip_new:N \l__tasks_after_item_skip
+\skip_new:N \l__tasks_custom_after_item_skip
+\skip_new:N \l__tasks_before_list_skip
+\skip_new:N \l__tasks_after_list_skip
+
+\coffin_new:N \l__tasks_item_coffin
+\coffin_new:N \l__tasks_label_coffin
+
+\NewCounterPattern* [ tasks ] { task } { tsk }
+\ReadCounterFrom [ tasks ] { task } \g__tasks_int
+
+% temporary variables:
+\int_new:N \l__tasks_tmpa_int
+\int_new:N \l__tasks_tmpb_int
+\tl_new:N \l__tasks_tmpa_tl
+\coffin_new:N \l__tasks_tmpa_coffin
+
+\cs_new:Npn \__tasks_debug:n #1
+ {
+ \bool_if:NTF \l__tasks_debug_bool
+ { \fbox {#1} }
+ { \use:n {#1} }
+ }
+
+% --------------------------------------------------------------------------
+% collect the tasks:
+\cs_new_protected:Npn \__tasks_collect_tasks:nww #1#2 \end #3
+ {
+ \tl_put_right:Nn \l__tasks_body_tl {#1}
+ \end {#3}
+ \tl_if_eq:nnF {#1} {#3}
+ { \__tasks_collect_tasks:nww {#1} }
+ }
+
+% #1: instance
+% #2: number of columns
+% #3: item separator
+% #4: environment body
+\cs_new_protected:Npn \__tasks:nnnn #1#2#3#4
+ {
+ \bool_if:NT \l__tasks_debug_bool { \dim_set:Nn \fboxsep {0pt} }
+ \seq_set_split:Nnn \l__tasks_seq {#3} {#4}
+ % remove the first (empty) item:
+ \seq_pop_left:NN \l__tasks_seq \l__tasks_tmpa_tl
+ \tl_if_blank:VF \l__tasks_tmpa_tl { \@noitemerr }
+ \int_gset:Nn \g__tasks_total_items_int
+ { \seq_count:N \l__tasks_seq }
+ \UseInstance {tasks} {#1}
+ { \g__tasks_total_items_int }
+ {#2}
+ { \l__tasks_custom_label_pattern_tl }
+ % just to be sure:
+ \seq_clear:N \l__tasks_seq
+ }
+\cs_generate_variant:Nn \__tasks:nnnn { VnnV }
+
+% #1: label
+% #2: item format
+% #3: item
+\cs_new_protected:Npn \__tasks_task:nnn #1#2#3
+ {
+ % start a new item line if \l__tasks_item_full_line_bool
+ \bool_if:NT \l__tasks_item_full_line_bool
+ {
+ % add skip if we were in the middle of a line, i.e., in horizontal
+ % mode:
+ \mode_if_horizontal:T
+ { \skip_vertical:N \l__tasks_after_item_skip }
+ \tasks_new_row:
+ }
+ % step column position:
+ \int_gincr:N \g__tasks_current_col_num_int
+ \dim_set:Nn \l__tasks_item_width_dim
+ {
+ \bool_if:NTF \l__tasks_item_full_line_bool
+ { \linewidth }
+ {
+ (
+ \linewidth
+ - \l__tasks_columns_int \l__tasks_column_sep_dim
+ + \l__tasks_column_sep_dim
+ ) / \l__tasks_columns_int
+ }
+ - \l__tasks_depth_int \l__tasks_item_indent_dim
+ \bool_if:NT \l__tasks_debug_bool { -2\fboxrule }
+ }
+ \__tasks_gset_rows_num:NN
+ \g__tasks_total_items_int
+ \l__tasks_columns_int
+ % set \g__tasks_current_col_num_int to 1 if at the start of a row,
+ % then also step \g__tasks_current_row_num_int :
+ \int_compare:nNnT
+ { \g__tasks_current_col_num_int } > { \l__tasks_columns_int }
+ {
+ \int_gset:Nn \g__tasks_current_col_num_int { 1 }
+ \int_incr:N \g__tasks_current_row_num_int
+ }
+ \bool_if:NT \l__tasks_item_rest_of_line_bool
+ {
+ \int_set:Nn \l__tasks_tmpa_int
+ { \l__tasks_columns_int - \g__tasks_current_col_num_int + 1 }
+ \int_compare:nNnTF { \l__tasks_item_columns_int } = { 0 }
+ {
+ \int_set:Nn \l__tasks_tmpb_int { \l__tasks_tmpa_int - 1 } % 8
+ }
+ {
+ \int_compare:nNnTF
+ { \l__tasks_tmpa_int } > { \l__tasks_item_columns_int }
+ { \int_set_eq:NN \l__tasks_tmpa_int \l__tasks_item_columns_int }
+ { \int_zero:N \l__tasks_item_columns_int }
+ \bool_if:nT
+ {
+ \l__tasks_item_rest_of_line_bool &&
+ !\int_compare_p:nNn { \l__tasks_item_columns_int} = { 0 }
+ }
+ {
+ \int_gadd:Nn \g__tasks_current_col_num_int
+ { \l__tasks_item_columns_int -1 }
+ \int_gadd:Nn \g__tasks_total_items_int
+ { \l__tasks_item_columns_int -1 }
+ }
+ \int_set:Nn \l__tasks_tmpb_int { \l__tasks_tmpa_int -1 }
+ }
+ \dim_set:Nn \l__tasks_item_width_dim
+ {
+ \l__tasks_tmpa_int \l__tasks_item_width_dim
+ + \l__tasks_tmpb_int \l__tasks_column_sep_dim
+ + \l__tasks_tmpb_int \l__tasks_item_indent_dim
+ \bool_if:NT \l__tasks_debug_bool
+ { + \int_eval:n { \l__tasks_tmpb_int * 2 } \fboxrule }
+ }
+ }
+ % set the item box:
+ \hcoffin_set:Nn \l__tasks_item_coffin
+ {
+ \vcoffin_set:Nnn \l__tasks_tmpa_coffin
+ { \l__tasks_item_width_dim }
+ { \__tasks_setup: #2 {#3} \strut }
+ \__tasks_debug:n
+ {
+ \coffin_typeset:Nnnnn \l__tasks_tmpa_coffin
+ {l} {T} {0pt} {0pt}
+ }
+ }
+ % set the label box:
+ \hcoffin_set:Nn \l__tasks_label_coffin
+ {
+ \vcoffin_set:Nnn \l__tasks_tmpa_coffin
+ {
+ \l__tasks_label_width_dim
+ \bool_if:NT \l__tasks_debug_bool {-2\fboxrule }
+ }
+ {
+ \noindent
+ \tl_use:N \l__tasks_item_fill_left_tl
+ \strut #1
+ \tl_use:N \l__tasks_item_fill_right_tl
+ }
+ \__tasks_debug:n
+ {
+ \coffin_typeset:Nnnnn \l__tasks_tmpa_coffin
+ {l} {T} {0pt} {0pt}
+ }
+ }
+ % attach the label box at the left of the item box, shifted by
+ % \l__tasks_label_offset_dim :
+ \coffin_attach:NnnNnnnn
+ \l__tasks_item_coffin {l} {T}
+ \l__tasks_label_coffin {l} {T}
+ {
+ \dim_compare:nNnTF
+ { \l__tasks_item_indent_dim }
+ <
+ { \l__tasks_label_offset_dim + \l__tasks_label_width_dim }
+ {0pt}
+ { - \l__tasks_label_width_dim - \l__tasks_label_offset_dim }
+ } { 0pt }
+ % when a new row starts enter vertical mode:
+ \int_compare:nNnT { \g__tasks_current_col_num_int } = { 1 }
+ { \skip_vertical:N \c_zero_skip }
+ % skip horizontally by \l__tasks_item_indent_dim
+ \noindent
+ \skip_horizontal:N \l__tasks_item_indent_dim
+ % typeset the item (with the attached label protruding to the left):
+ \coffin_typeset:Nnnnn \l__tasks_item_coffin
+ {l}
+ {T}
+ {0pt}
+ {0pt}
+ \bool_if:nT
+ {
+ \l__tasks_item_full_line_bool ||
+ (
+ \l__tasks_item_rest_of_line_bool &&
+ \int_compare_p:nNn { \l__tasks_item_columns_int } = { 0 }
+ )
+ }
+ { \tasks_new_row: }
+ % are we between items in a row? The skip by \l__tasks_column_sep_dim :
+ \int_compare:nNnT
+ { \g__tasks_current_col_num_int } < { \l__tasks_columns_int }
+ { \skip_horizontal:N \l__tasks_column_sep_dim }
+ % if we ended a row and a new row is still to come skip vertically by
+ % \l__tasks_after_item_skip :
+ \bool_if:nT
+ {
+ ( \int_compare_p:nNn { \g__tasks_current_col_num_int } = { \l__tasks_columns_int } )
+ &&
+ ( \int_compare_p:n { \g__tasks_current_row_num_int != \l__tasks_rows_int } )
+ }
+ { \skip_vertical:N \l__tasks_after_item_skip }
+ % clean up:
+ \coffin_clear:N \l__tasks_item_coffin
+ \coffin_clear:N \l__tasks_label_coffin
+ \coffin_clear:N \l__tasks_tmpa_coffin
+ \bool_set_false:N \l__tasks_item_full_line_bool
+ \bool_set_false:N \l__tasks_item_rest_of_line_bool
+ }
+\cs_generate_variant:Nn \__tasks_task:nnn { VVV }
+
+\cs_new_protected:Npn \__tasks_setup:
+ {
+ \dim_set:Nn \parskip { 0pt }
+ \skip_set:Nn \parfillskip { 0pt plus 1fil }
+ \dim_set_eq:NN \parskip \parsep
+ \dim_set_eq:NN \parindent \listparindent
+ \noindent
+ \dim_compare:nNnT
+ { \l__tasks_item_indent_dim }
+ <
+ { \l__tasks_label_offset_dim + \l__tasks_label_width_dim }
+ {
+ \skip_horizontal:n
+ {
+ \l__tasks_label_offset_dim
+ + \l__tasks_label_width_dim
+ - \l__tasks_item_indent_dim
+ }
+ }
+ \strut
+ }
+
+\cs_new_protected:Npn \__tasks_gset_rows_num:NN #1#2
+ {
+ \int_gset:Nn \l__tasks_rows_int { \int_div_truncate:nn {#1} {#2} }
+ \int_compare:nNnT { \int_mod:nn {#1} {#2} } > { 0 }
+ { \int_gincr:N \l__tasks_rows_int }
+ }
+
+\cs_new_protected:Npn \__tasks_label_align:n #1
+ {
+ \str_case:nnF {#1}
+ {
+ {left}
+ {
+ \tl_clear:N \l__tasks_item_fill_left_tl
+ \tl_set_eq:NN \l__tasks_item_fill_right_tl \hfill
+ }
+ {right}
+ {
+ \tl_set_eq:NN \l__tasks_item_fill_left_tl \hfill
+ \tl_clear:N \l__tasks_item_fill_right_tl
+ }
+ {center}
+ {
+ \tl_set_eq:NN \l__tasks_item_fill_left_tl \hfill
+ \tl_set_eq:NN \l__tasks_item_fill_right_tl \hfill
+ }
+ }
+ {
+ \tl_clear:N \l__tasks_item_fill_left_tl
+ \tl_set_eq:NN \l__tasks_item_fill_right_tl \hfill
+ }
+ }
+\cs_generate_variant:Nn \__tasks_label_align:n { V }
+\__tasks_label_align:n {left}
+
+% --------------------------------------------------------------------------
+% the `tasks' object:
+% #1: number of items
+% #2: number of columns
+% #3: label-format
+\DeclareObjectType {tasks} {3}
+% the `default' template interface:
+\DeclareTemplateInterface {tasks} {default} {3}
+ {
+ enumerate : boolean = true ,
+ label : tokenlist ,
+ indent : length = 2.5em ,
+ counter-format : tokenlist = tsk[a]) ,
+ label-format : tokenlist ,
+ label-width : length = 1em ,
+ label-offset : length = .3333em ,
+ item-format : tokenlist ,
+ after-item-skip : skip = 1ex plus 1ex minus 1ex
+ }
+
+% in the next three commands we want a really unlikely to occur marker; for
+% this we use $ with unusual catcode in ``$tasks$default$label$'':
+\cs_set:Nx \__tasks_restore_dollar:
+ { \char_set_catcode:nn {36} { \char_value_catcode:n {36} } }
+\char_set_catcode_alignment:N \$
+
+% the `default' template code:
+\DeclareTemplateCode {tasks} {default} {3}
+ {
+ enumerate = \l__tasks_enumerate_bool ,
+ label = \l__tasks_label_tl ,
+ indent = \l__tasks_item_default_indent_dim ,
+ counter-format = \l__tasks_label_pattern_tl ,
+ label-format = \l__tasks_label_format_tl ,
+ label-width = \l__tasks_label_default_width_dim ,
+ label-offset = \l__tasks_label_default_offset_dim ,
+ item-format = \l__tasks_item_format_tl ,
+ after-item-skip = \l__tasks_after_item_skip
+ }
+ {
+ \AssignTemplateKeys
+ \bool_if:NF \l__tasks_label_width_bool
+ {
+ \dim_set_eq:NN
+ \l__tasks_label_width_dim
+ \l__tasks_label_default_width_dim
+ }
+ \bool_if:NF \l__tasks_item_indent_bool
+ {
+ \dim_set_eq:NN
+ \l__tasks_item_indent_dim
+ \l__tasks_item_default_indent_dim
+ }
+ \bool_if:NF \l__tasks_label_offset_bool
+ {
+ \dim_set_eq:NN
+ \l__tasks_label_offset_dim
+ \l__tasks_label_default_offset_dim
+ }
+ % \dim_compare:nNnT
+ % { \l__tasks_item_indent_dim }
+ % <
+ % { \l__tasks_label_offset_dim + \l__tasks_label_width_dim }
+ % {
+ % \dim_set:Nn \l__tasks_item_indent_dim
+ % { \l__tasks_label_offset_dim + \l__tasks_label_width_dim }
+ % }
+ \bool_if:NT \l__tasks_custom_after_item_skip_bool
+ {
+ \skip_set_eq:NN
+ \l__tasks_after_item_skip
+ \l__tasks_custom_after_item_skip
+ }
+ \bool_if:NT \l__tasks_custom_label_bool
+ {
+ \tl_set_eq:NN
+ \l__tasks_label_tl
+ \l__tasks_custom_label_tl
+ \bool_set_false:N \l__tasks_enumerate_bool
+ }
+ \__tasks_label_align:V \l__tasks_label_align_tl
+ % need this for enumerate list:
+ \bool_if:nT { !\l__tasks_resume_bool && \l__tasks_enumerate_bool }
+ { \int_gzero:N \g__tasks_int }
+ \int_set:Nn \l__tasks_columns_int {#2}
+ % set all the items in their own coffins and join with the ground:
+ \int_gzero:N \g__tasks_current_col_num_int
+ \int_set:Nn \g__tasks_current_row_num_int {1}
+ \tl_if_blank:VF \l__tasks_custom_label_pattern_tl
+ {
+ \tl_set_eq:NN
+ \l__tasks_label_pattern_tl
+ \l__tasks_custom_label_pattern_tl
+ }
+ \tl_if_blank:VF \l__tasks_custom_label_format_tl
+ {
+ \tl_set_eq:NN
+ \l__tasks_label_format_tl
+ \l__tasks_custom_label_format_tl
+ }
+ \tl_if_blank:VF \l__tasks_custom_item_format_tl
+ {
+ \tl_set_eq:NN
+ \l__tasks_item_format_tl
+ \l__tasks_custom_item_format_tl
+ }
+ \seq_map_inline:Nn \l__tasks_seq
+ {
+ \__tasks_read_item:www ##1 \q_stop
+ \bool_if:NTF \l__tasks_enumerate_bool
+ {
+ \tl_if_eq:VnT \l__tasks_tmp_label_tl { $tasks$default$label$ }
+ {
+ \int_gincr:N \g__tasks_int
+ \SaveCounterPatternFrom [tasks]
+ \l__tasks_tmpa_tl
+ \l__tasks_label_tl
+ \l__tasks_label_pattern_tl
+ \cs_gset:Npx \@currentlabel { \l__tasks_label_tl }
+ }
+ }
+ {
+ \tl_if_blank:VT \l__tasks_label_tl
+ { \tl_set_eq:NN \l__tasks_label_tl \labelitemi }
+ }
+ \tl_put_left:NV \l__tasks_label_tl \l__tasks_label_format_tl
+ % \tl_put_left:NV \l__tasks_item_tl \l__tasks_item_format_tl
+ \tl_if_eq:VnTF \l__tasks_tmp_label_tl { $tasks$default$label$ }
+ {
+ \__tasks_task:VVV
+ \l__tasks_label_tl
+ \l__tasks_item_format_tl
+ \l__tasks_item_tl
+ }
+ {
+ \__tasks_task:VVV
+ \l__tasks_tmp_label_tl
+ \l__tasks_item_format_tl
+ \l__tasks_item_tl
+ \tl_clear:N \l__tasks_tmp_label_tl
+ }
+ }
+ }
+
+\cs_new_protected:Npn \__tasks_read_item:www
+ {
+ \peek_meaning_remove:NTF !
+ {
+ \bool_set_true:N \l__tasks_item_full_line_bool
+ \__tasks_read_item_aux:ww
+ }
+ {
+ \peek_meaning_remove:NTF *
+ {
+ \bool_set_true:N \l__tasks_item_rest_of_line_bool
+ \__tasks_read_item_rest_of_line:ww
+ }
+ { \__tasks_read_item_aux:ww }
+ }
+ }
+
+\cs_new_protected:Npn \__tasks_read_item_rest_of_line:ww
+ {
+ \peek_meaning:NTF ( % )
+ { \__tasks_read_item_rest_of_line_aux:ww }
+ { \__tasks_read_item_rest_of_line_aux:ww (0) }
+ }
+
+\cs_new_protected:Npn \__tasks_read_item_rest_of_line_aux:ww (#1)
+ {
+ \int_set:Nn \l__tasks_item_columns_int {#1}
+ \__tasks_read_item_aux:ww
+ }
+
+\cs_new_protected:Npn \__tasks_read_item_aux:ww
+ {
+ \peek_meaning:NTF [ % ]
+ { \__tasks_read_item_aux_ii:ww }
+ { \__tasks_read_item_aux_ii:ww [$tasks$default$label$] }
+ }
+
+\cs_new_protected:Npn \__tasks_read_item_aux_ii:ww [#1]#2 \q_stop
+ {
+ \tl_set:Nn \l__tasks_tmp_label_tl {#1}
+ \tl_if_eq:nnF { #1 } { $tasks$default$label$ }
+ { \tl_put_left:NV \l__tasks_tmp_label_tl \l__tasks_label_format_tl }
+ \tl_set:Nx \l__tasks_item_tl { \tl_trim_spaces:n {#2} }
+ }
+
+\__tasks_restore_dollar:
+
+% --------------------------------------------------------------------------
+% choice box:
+\bool_new:N \l__tasks_choice_checked_bool
+\dim_new:N \l__tasks_choice_width_dim
+\dim_set:Nn \l__tasks_choice_width_dim { 1.25ex }
+\dim_new:N \l__tasks_choice_linewidth_dim
+\dim_set:Nn \l__tasks_choice_linewidth_dim { .3pt }
+\dim_new:N \l__tasks_choice_checkwidth_dim
+\dim_set:Nn \l__tasks_choice_checkwidth_dim { .5pt }
+\dim_new:N \l__tasks_choice_raise_dim
+\dim_set:Nn \l__tasks_choice_raise_dim { .1ex }
+
+\cs_new_protected:Npn \tasks_choice:
+ {
+ \leavevmode
+ \group_begin:
+ \bool_set_false:N \l__tasks_choice_checked_bool
+ \box_move_up:nn
+ { \l__tasks_choice_raise_dim }
+ { \hbox:n { \__tasks_choice: } }
+ \group_end:
+ }
+
+\cs_new_protected:Npn \tasks_choice_checked:
+ {
+ \leavevmode
+ \group_begin:
+ \bool_set_true:N \l__tasks_choice_checked_bool
+ \box_move_up:nn
+ { \l__tasks_choice_raise_dim }
+ { \hbox:n { \__tasks_choice: } }
+ \group_end:
+ }
+
+\cs_new_protected:Npn \__tasks_choice:
+ {%
+ \dim_set:Nn \unitlength { .1\l__tasks_choice_width_dim }
+ \begin{picture}(10,0)
+ \linethickness \l__tasks_choice_linewidth_dim
+ \drawline(0,0)(0,10)(10,10)(10,0)(0,0)
+ \linethickness \l__tasks_choice_checkwidth_dim
+ \bool_if:NT \l__tasks_choice_checked_bool
+ {
+ \drawline(2,2)(8,8)
+ \drawline(2,8)(8,2)
+ }
+ \end{picture}%
+ }
+
+\providecommand* \choicebox { \tasks_choice: }
+\providecommand* \checkedchoicebox { \tasks_choice_checked: }
+
+% --------------------------------------------------------------------------
+% base instance:
+% ALPHABETIZE: a) b) c)
+\DeclareInstance {tasks} {alphabetize} {default} { }
+
+\keys_define:nn {tasks/list}
+ {
+ debug .bool_set:N = \l__tasks_debug_bool ,
+ style .tl_set:N = \l__tasks_instance_tl ,
+ style .initial:n = alphabetize ,
+ counter-format .tl_set:N = \l__tasks_custom_label_pattern_tl ,
+ label .code:n =
+ \bool_set_true:N \l__tasks_custom_label_bool
+ \tl_set:Nn \l__tasks_custom_label_tl {#1} ,
+ label-format .tl_set:N = \l__tasks_custom_label_format_tl ,
+ label-width .code:n =
+ \dim_set:Nn \l__tasks_label_width_dim {#1}
+ \bool_set_true:N \l__tasks_label_width_bool ,
+ label-offset .code:n =
+ \dim_set:Nn \l__tasks_label_offset_dim {#1}
+ \bool_set_true:N \l__tasks_label_offset_bool ,
+ label-align .tl_set:N = \l__tasks_label_align_tl ,
+ item-format .tl_set:N = \l__tasks_custom_item_format_tl ,
+ item-indent .code:n =
+ \dim_set:Nn \l__tasks_item_indent_dim {#1}
+ \bool_set_true:N \l__tasks_item_indent_bool ,
+ column-sep .dim_set:N = \l__tasks_column_sep_dim ,
+ before-skip .skip_set:N = \l__tasks_before_list_skip ,
+ after-skip .skip_set:N = \l__tasks_after_list_skip ,
+ after-item-skip .code:n =
+ \bool_set_true:N \l__tasks_custom_after_item_skip_bool
+ \skip_set:Nn \l__tasks_custom_after_item_skip {#1} ,
+ resume .bool_set:N = \l__tasks_resume_bool
+ }
+
+% --------------------------------------------------------------------------
+% the generic environment:
+\NewEnviron {__tasks_env:} [3]
+ {
+ \if@inlabel
+ \noindent\par\nobreak\vskip-\parskip\vskip-\baselineskip\hrule\@height\z@
+ \fi
+ \dim_compare:nNnF { \l__tasks_before_list_skip } = { 0pt }
+ { \vspace {\l__tasks_before_list_skip} }
+ \list {}
+ {
+ \keys_set:nn {tasks/list} {#2}
+ \dim_set:Nn \leftmargin {0pt}
+ \dim_set:Nn \rightmargin {0pt}
+ }
+ \item \scan_stop:
+ \int_incr:N \l__tasks_depth_int
+ \__tasks:VnnV \l__tasks_instance_tl {#3} {#1} \BODY
+ \endlist
+ \dim_compare:nNnF { \l__tasks_after_list_skip } = { 0pt }
+ { \vspace {\l__tasks_after_list_skip} }
+ }
+
+% --------------------------------------------------------------------------
+% command to start a new row:
+\cs_new_protected:Npn \tasks_new_row:
+ {
+ \int_gset:Nn \g__tasks_total_items_int
+ {
+ \g__tasks_total_items_int +
+ \l__tasks_columns_int -
+ \g__tasks_current_col_num_int
+ }
+ \__tasks_gset_rows_num:NN
+ \g__tasks_total_items_int
+ \l__tasks_columns_int
+ \int_gset_eq:NN \g__tasks_current_col_num_int \l__tasks_columns_int
+ }
+
+\NewDocumentCommand \startnewitemline {}
+ { \tasks_new_row: }
+
+% --------------------------------------------------------------------------
+% the user environment:
+\NewDocumentCommand \NewTasks { O{}mO{\task}D(){1} }
+ {
+ \NewDocumentEnvironment {#2} { O{}D(){#4} }
+ { \__tasks_env: {#3} { #1,##1 } {##2} }
+ { \end__tasks_env: }
+ }
+
+\NewDocumentCommand \RenewTasks { O{}mO{\task}D(){1} }
+ {
+ \RenewDocumentEnvironment {#2} { O{}D(){#4} }
+ { \__tasks_env: {#3} { #1,##1 } {##2} }
+ { \end__tasks_env: }
+ }
+
+% --------------------------------------------------------------------------
+% default list:
+\NewTasks {tasks}
+
+\file_if_exist:nT {tasks.cfg} { \file_input:n {tasks.cfg} }
+
+% --------------------------------------------------------------------------
+% setup:
+\cs_new_protected:Npn \tasks_setup:n #1
+ { \keys_set:nn {tasks/list} {#1} }
+
+\NewDocumentCommand \settasks { m }
+ { \tasks_setup:n {#1} }
+
+% --------------------------------------------------------------------------
+\tex_endinput:D
+
+% HISTORY:
+2013/01/19 v0.7 - extracted from `exsheets' package; this also lead to a
+ slightly new syntax and a few new options for it
+2013/04/04 v0.8a - corrected \seq_length:N => \seq_count:N
+2013/04/07 v0.9 - protected internal commands where appropriate
+ - made enumerated item referenceable with \label{}
+ and \ref{}; this introduced new options:
+ * the former `label-format' is now `counter-format'
+ * new: `label-format'
+ - changed defaults for `label-width' and `label-offset'
+ - ensure that the `after-item-skip' is only
+ inserted in between rows
+ - new option `after-item-skip'
+ - improvements when label are set with optional argument:
+ * a provided but empty argument is now correctly recognized
+ * the counter is _not_ stepped anymore for enumerated
+ lists when the optional argument is provided
+ - new command \startnewitemline that forces the next item to
+ be put at the beginning of a row
+2013/04/22 v0.9a - new option `item-indent'
+ - synchronized version number with `exsheets' until now but
+ won't any more
+2013/12/03 v0.9b - add missing \noindent for the case when \listparindent is
+ non-zero, fixes http://tex.stackexchange.com/q/148082/5049
+2014/05/11 v0.9c - remove definition of the \task macro: it is not necessary
+ for `tasks' to function but it conflicts e.g. with `ltxdoc'
+ class
+2014/07/20 v0.10 - new option `debug'
+ - new option `column-sep
+ - renamed a few internal variables
+ - remove package from the `exsheets' bundle and distribute
+ it as package of its own
+ - new: optional bang to a \task forces an item to use a full
+ line (\task!)
+ - new: optional star to a \task forces an item to use the
+ complete remaining line (\task*); the star has itself has
+ an optional argument for specifying the number of columns
+ to span (\task*(<num>))
+2014/07/29 v0.10a - bug-fix: correct typo in option definition of `column-sep'
+ - insert before/after skip with \vspace*
+ - remove unnecessary (and unused) arguments of
+ \__tasks_task:nn
+ - add \strut to the end of an item
+2016/05/03 v0.11 - new option: `item-format'
+ - some changes to how the list is displayed, especially
+ regarding spacing -- it now better resembles the standard
+ lists
+2016/05/04 v0.11a - enable `style' option globally again
+2016/08/13 v0.12 - the item indent and label width and label offset now play
+ together like one would expect: an item indent of 0pt will
+ align the complete item with the margin and the needed
+ overlap for the label is reserved