On 4/7/2016 8:28 AM, Zhichu Chen wrote:
If I understand correctly, the "continue=yes" key prevents a new page
generated by a lower-level structure, e.g., section, following a
higher-level structure, e.g., chapter.
Then why the checking is so complex in strc-sec.mkiv:
==================================
\def\strc_sectioning_handle_page_nop
{\edef\p_continue{\headparameter\c!continue}%
\ifx\p_continue\v!yes
\ifnum\previoussectioncountervalue=\zerocount
\strc_sectioning_check_layout
\else\ifnum\currentsectioncountervalue>\zerocount
\strc_sectioning_check_layout
\fi\fi
\else
\strc_sectioning_check_layout
\fi}
==================================
I temporarily changed the definition to:
==================================
\newcount\previousheadlevel
\previousheadlevel\plusone
\def\strc_sectioning_handle_page_nop
{\edef\p_continue{\headparameter\c!continue}%
\ifx\p_continue\v!yes
\ifnum\currentheadlevel>\previousheadlevel\else
\strc_sectioning_check_layout
\fi
\else
\strc_sectioning_check_layout
\fi
\previousheadlevel\currentheadlevel}
==================================
Seems fine.
\def\currentsectioncountervalue
{\clf_depthnumber\numexpr\thenamedheadlevel\currenthead\relax}
%def\previoussectioncountervalue{\clf_depthnumber\numexpr\thenamedheadlevel\currenthead+\minusone\relax}
\def\previoussectioncountervalue{\clf_depthnumber\numexpr\thenamedheadlevel\previoushead\relax}
\let\previoushead\empty
\def\strc_sectioning_handle_page_nop
{\edef\p_continue{\headparameter\c!continue}%
\ifx\p_continue\v!yes
\ifx\currenthead\previoushead % not really needed
\strc_sectioning_check_layout
\else\ifnum\previoussectioncountervalue=\zerocount
\strc_sectioning_check_layout
\else\ifnum\currentsectioncountervalue>\zerocount
\strc_sectioning_check_layout
\fi\fi\fi
\else
\strc_sectioning_check_layout
\fi
\globallet\previoushead\currenthead}
\def\strc_sectioning_handle_page_yes
{\ifconditional\c_strc_sectioning_ignore_page
\setfalse\c_strc_sectioning_ignore_page
\else
% beware, these numbers are not yet know here
\strc_sectioning_handle_page_nop
\edef\p_aligntitle{\headparameter\c!aligntitle}%
\ifx\p_aligntitle\v!float
\ifconditional\c_strc_sectioning_auto_break
\vspacing[\v!samepage-\currentheadlevel]%
\fi
\headparameter\c!before\relax
\indent
\else
\page_otr_command_flush_side_floats
\ifconditional\c_strc_sectioning_auto_break
\vspacing[\v!samepage-\currentheadlevel]%
\fi
\headparameter\c!before\relax
\fi
\global\c_strc_sectioning_preceding_level\currentheadlevel
\fi
\globallet\previoushead\currenthead}
but it really needs testing with other cases
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