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1%D \module
2%D   [      file=s-fonts-steps, % was s-fnt-20
3%D        version=2009.01.10,
4%D          title=\CONTEXT\ Style File,
5%D       subtitle=Tracing Feature Application (1),
6%D         author=Hans Hagen,
7%D           date=\currentdate,
8%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
9%C
10%C This module is part of the \CONTEXT\ macro||package and is
11%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
12%C details.
13
14%D This file is used by Idris and me in the process of getting the
15%D best arabic fonts getting rendered best. As such it might change.
16
17\startmodule[fonts-steps]
18
19% \setvariables
20%   [otftracker]
21%   [title=Reverse Chaining,
22%    figure=test-003-volt.pdf,
23%    font=husayni,
24%    sample={ببب بببب ببببب بببببب}]
25
26\def\checkedotftrackerfeature  #1{otftracker-\ifnum\featureattribute{otftracker-#1}=\zerocount default\else#1\fi}
27\def\checkedotftrackerdirection#1{\csname otftracker-direction-\ifcsname otftracker-direction-#1\endcsname#1\else default\fi\endcsname}
28
29% we can consider adding a dir key to features
30
31\definefontfeature
32  [otftracker-default]
33  [default]
34  [mode=node]
35
36\definefontfeature
37  [otftracker-arabtype]
38  [mode=node,analyze=yes,
39   language=dflt,script=arab,ccmp=yes,
40   init=yes,medi=yes,fina=yes,isol=yes,
41   liga=yes,dlig=yes,rlig=yes,clig=yes,
42   mark=yes,mkmk=yes,kern=yes,curs=yes]
43
44\definefontfeature
45  [otftracker-husayni-default]
46  [analyze=yes,mode=node,
47   language=dflt,script=arab,
48   init=yes,medi=yes,fina=yes,
49   spacekern=yes,
50   calt=yes,
51   rlig=yes,
52   ccmp=yes,
53   salt=yes,
54   ss01=yes, % full Allah, Muhammad, Allahumma
55   ss05=yes, % full Jiim stacking
56   ss09=yes, % full Haa stacking
57   ss10=yes, % partial dipped Miim
58   ss13=yes, % full stacked Miim
59   ss15=yes, % full stacked Laam-on-Miim
60   ss17=yes, % full stacked Ayn-on-Miim
61   ss19=yes, % LM_im
62   ss24=yes, % BX specials
63   ss25=yes, % LH_im specials
64   ss26=yes, % full Yaa.final specials
65   ss27=yes, % partial thin Miim.final
66   ss31=yes, % partial Raa.final contexts
67   ss34=yes, % partial Raa.final contexts
68   ss35=yes, % full Kaaf contexts
69   ss36=yes, % full Laam contexts
70   ss37=yes, % Miim-Miim contexts
71   ss38=yes, % fancy thin Haa.medial-Miim.final
72   ss39=yes, % high and low Baa strings
73   ss40=yes, % diagonal entry
74   ss41=yes, % initial alternates
75   mark=yes,mkmk=yes,kern=yes,curs=yes]
76
77\definefontfeature
78  [otftracker-husayni]
79  [otftracker-husayni-default]
80
81\definefontfeature
82  [otftracker-simplenaskhi]
83  [analyze=yes,mode=node,
84   language=dflt,script=arab,
85   init=yes,medi=yes,fina=yes,calt=yes,
86   rlig=yes,liga=yes,dlig=yes,
87   mark=yes,mkmk=yes,kern=yes,curs=yes]
88
89\setvalue{otftracker-direction-arabtype}{r2l}
90\setvalue{otftracker-direction-husayni}{r2l}
91\setvalue{otftracker-direction-simplenaskhi}{r2l}
92\setvalue{otftracker-direction-default}{}
93\setvalue{otftracker-direction-sbl-hbrw}{r2l}
94
\setvariables
96  [otftracker]
97  [font=Serif,
98   features=\checkedotftrackerfeature{\getvariable{otftracker}{font}},
99   direction=\checkedotftrackerdirection{\getvariable{otftracker}{font}},
100   size=48pt,
101   figure=,
102   title=Feature Check,
103   sample=no sample,
104   set=\setups{otftracker}]
105
106\setuplayout
107  [topspace=1.5cm,
108   backspace=1.5cm,
109   width=middle,
110   height=middle,
111   header=1.5cm,
112   footer=1.5cm]
113
114\setuphead
115  [chapter]
116  [header=high,
117   number=no]
118
119\setupfootertexts
120  [chapter]
121
122\setupalign
123  [flushleft]
124
125\setupcolors
126  [state=start]
127
128\startsetups otftracker-steps
129    \doifsomething {\getvariable{otftracker}{figure}} {
130        \startlinecorrection
131            \externalfigure[\getvariable{otftracker}{figure}][maxwidth=\hsize,frame=on]
132        \stoplinecorrection
133    }
134    \showotfcomposition
135        {\getvariable{otftracker}{font}*\getvariable{otftracker}{features} at \getvariable{otftracker}{size}}
136        {\getvariable{otftracker}{direction}}
137        {\getvariable{otftracker}{sample}}
138\stopsetups
139
140\startsetups otftracker
141    \setupbodyfont[tt,10pt]
142    \starttext
143        \normalexpanded{\startchapter[title={\getvariable{otftracker}{title}}]}
144            \directsetup{otftracker-steps}
145            \directsetup{otftracker-extra}
146        \stopchapter
        \setvariables[otftracker][comment=]
148    \stoptext
149\stopsetups
150
151%D For old times sake we keep this one:
152
153\unexpanded\def\ShowOtfTrackerSample#1%
154  {\doiffile{#1}
155     {\blank
156      \startlinecorrection
157      \vbox \bgroup
158        \forgetall
159        \setbox\scratchbox\hbox{\component #1 \relax}
160        \hbox{\copy\scratchbox\quad\lower\dp\scratchbox\hbox{\ruledhbox{\externalfigure[#1-volt.pdf][height=\htdp\scratchbox]}}}
161        \hbox{\strut\tttf#1}%
162      \egroup
163      \stoplinecorrection
164      \blank}}
165
166\stopmodule
167
168\continueifinputfile{s-fonts-steps.mkiv}
169
170\usemodule[art-01]
171
172\setupbodyfont
173%   [cambria]
174  [dejavu]
175
176\starttext
177
\setvariables
179  [otftracker]
180  [font=Serif,
181   size=48pt,
182   figure=,
183   title=Feature Check,
184   sample={affiliation}]
185
186\stoptext
187