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14\writestatus{loading}{ConTeXt Anchoring Macros Margin Bars}
15
16\unprotect
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58\installcorenamespace{sidebar}
59
60\installcommandhandler \??sidebar {sidebar} \??sidebar
61
62\newinteger \c_anch_sidebars_n
63\newinteger \c_anch_sidebars_current
64\newdimension\d_anch_sidebars_distance
65\newinteger \c_anch_sidebars_level
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73\setupsidebar
74 [\c!rulethickness=\dimexpr\bodyfontsize6\relax,
75 \c!rulecolor=\s!black,
76 \c!alternative=0,
77 \c!topoffset=\zeropoint,
78 \c!bottomoffset=\zeropoint,
79 \c!distance=.5\bodyfontsize,
80 \c!level=,
81 \c!location=\v!left,
82 \c!leftmargindistance=\zeropoint]
83
84\aliased\let\setupsidebars\setupsidebar
85
86\permanent\tolerant\protected\def\startsidebar[#S#1]#*[#S#2]
87 {\bgroup
88 \dontleavehmode
89 \advanceby\c_anch_sidebars_level\plusone
90 \global\advanceby\c_anch_sidebars_n\plusone
91 \c_anch_sidebars_current\c_anch_sidebars_n\relax
92 \ifhastok={#1}
93 \cdef\currentsidebar{\the\c_anch_sidebars_level}
94 \checksidebarparent
95 \setupcurrentsidebar[#1]
96 \else
97 \cdef\currentsidebar{#1}
98 \setupcurrentsidebar[#2]
99 \fi
100 \scratchdistance\sidebarparameter\c!distance\relax
101 \scratchdimen\sidebarparameter\c!leftmargindistance\relax
102 \edef\m_level{\sidebarparameter\c!level}
103 \ifempty\m_level
104 \ifnum\c_anch_sidebars_level=\plusone
105 \ifzeropt\scratchdimen
106 \advanceby\d_anch_sidebars_distance\scratchdistance\relax
107 \else
108 \d_anch_sidebars_distance\scratchdimen
109 \fi
110 \else
111 \advanceby\d_anch_sidebars_distance\scratchdistance\relax
112 \fi
113 \orelse\ifnum\m_level=\plusone
114 \ifzeropt\scratchdimen
115 \advanceby\d_anch_sidebars_distance\scratchdistance\relax
116 \else
117 \d_anch_sidebars_distance\scratchdimen
118 \fi
119 \else
120 \d_anch_sidebars_distance\dimexpr\scratchdimen\numexpr\m_level\plusone\relax\dimexpr\scratchdistance\relax\relax
121 \fi
122 \startpositionoverlay{\v!text1}
123 \normalexpanded{\setMPpositiongraphicrange
124 {b:sidebar:\the\c_anch_sidebars_n}
125 {e:sidebar:\the\c_anch_sidebars_n}
126 {mpos:sidebar}
127 {self=sidebar:\the\c_anch_sidebars_n,
128 location=\mplocation{\sidebarparameter\c!location},
129 linewidth=\sidebarparameter\c!rulethickness,
130 linecolor=\sidebarparameter\c!rulecolor,
131 alternative=\sidebarparameter\c!alternative,
132 topoffset=\the\dimexpr\sidebarparameter\c!topoffset,
133 bottomoffset=\the\dimexpr\sidebarparameter\c!bottomoffset,
134 distance=\the\d_anch_sidebars_distance}
135 }
136 \stoppositionoverlay
137 \bpos{sidebar:\the\c_anch_sidebars_current}
138 \ignorespaces}
139
140\permanent\protected\def\stopsidebar
141 {\removelastspace
142 \epos{sidebar:\the\c_anch_sidebars_current}
143 \carryoverpar\egroup}
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148\startMPpositionmethod{mpos:sidebar}
149 \startMPpositiongraphic{mpos:sidebar}{linecolor,linewidth,distance,alternative}
150 anch_sidebars_draw("\MPbself", "\MPeself", "\textanchor") ;
151 \stopMPpositiongraphic
152 \MPpositiongraphic{mpos:sidebar}{}
153\stopMPpositionmethod
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183\definesidebar
184 [\v!margin]
185 [\c!leftmargindistance=\dimexpr\leftmargindistance\sidebarparameter\c!rulethickness2\relax]
186
187\dorecurse{5}{\definesidebar[\v!margin:#1][\v!margin]}
188
189\permanent\tolerant\protected\def\setupmarginrule[#S#1]#*[#S#2]
190 {\ifarguments\or
191 \setupsidebar[\v!margin][#1]
192 \or
193 \setupsidebar[\v!margin:#1][#2]
194 \fi}
195
196\aliased\let\setupmarginrules\setupmarginrule
197
198\permanent\tolerant\protected\def\startmarginrule[#S#1]
199 {\edef\m_anch_marginrules_kind{#1}
200 \ifempty\m_anch_marginrules_kind
201 \startsidebar[\v!margin][]
202 \orelse\ifhastok={#1}
203 \startsidebar[\v!margin][#1]
204 \else
205 \anch_marginrules_check{#1}
206 \startsidebar[\v!margin:#1][\c!level=#1]
207 \fi}
208
209\def\anch_marginrules_check#1
210 {\doifnotcommandhandler\??sidebar{\v!margin:#1}{\definesidebar[\v!margin:#1][\v!margin]}}
211
212\aliased\let\stopmarginrule\stopsidebar
213
214\protect \endinput
215 |