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1%D \module
2%D   [       file=font-mat,
3%D        version=2011.01.13, % (copied fron font-ini)
4%D          title=\CONTEXT\ Font Macros,
5%D       subtitle=Symbolic Access,
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\writestatus{loading}{ConTeXt Font Macros / Symbolic Access}
15
16\unprotect
17
18%D \macros
19%D   {getglyph, symbolicfont}
20%D
21%D Individual glyphs can be accessed by using
22%D
23%D \starttyping
24%D \getglyph{fontname}{character}
25%D \stoptyping
26%D
27%D This macro is used in for instance the symbol modules and as one can see, it does
28%D obey the small and even smaller sizes. The \type {\symbolicfont} macro can be
29%D used to switch to a font named \type {fontname} (see \type {cont-log} and \type
30%D {symb-eur} for examples of symbolic definitions.
31
32\def\v_font_string_a
33  {\ifx\fontstyle\s!rm \s!Serif \else
34   \ifx\fontstyle\s!ss \s!Sans  \else
35   \ifx\fontstyle\s!tt \s!Mono  \else
36                       \s!Serif \fi\fi\fi}
37
38\def\v_font_string_b
39  {\ifx\fontstyle\s!rm \s!Regular \else
40   \ifx\fontstyle\s!ss \s!Support \else
41   \ifx\fontstyle\s!tt \s!Type    \else
42                       \s!Serif   \fi\fi\fi}
43
44\def\v_font_string_c
45  {\ifx\fontalternative\s!bf \s!Bold        \else
46   \ifx\fontalternative\s!sl \s!Slanted     \else
47   \ifx\fontalternative\s!it \s!Italic      \else
48   \ifx\fontalternative\s!bs \s!BoldSlanted \else
49   \ifx\fontalternative\s!bi \s!BoldItalic  \fi\fi\fi\fi\fi}
50
51\let\v_font_string_d\s!Serif % default fontstyle (will be redefined in type-ini)
52
53\definefontsynonym
54  [CurrentFont]
55  [\noexpand\v_font_string_a\noexpand\v_font_string_c]
56
57% potential generalization:
58%
59% \letvalue{\??fontfile:t:\s!rm}\s!Serif
60% \letvalue{\??fontfile:t:\s!ss}\s!Sans
61% \letvalue{\??fontfile:t:\s!tt}\s!Mono
62%
63% \letvalue{\??fontfile:a:\s!rm}\s!Regular
64% \letvalue{\??fontfile:a:\s!ss}\s!Support
65% \letvalue{\??fontfile:a:\s!tt}\s!Type
66%
67% \letvalue{\??fontfile:s:\s!bf}\s!Bold
68% \letvalue{\??fontfile:s:\s!sl}\s!Slanted
69% \letvalue{\??fontfile:s:\s!it}\s!Italic
70% \letvalue{\??fontfile:s:\s!bs}\s!BoldSlanted
71% \letvalue{\??fontfile:s:\s!bi}\s!BoldItalic
72%
73% \def\v_font_string_a{\executeifdefined{\??fontfile:t:\fontstyle}\s!Serif}
74% \def\v_font_string_a{\executeifdefined{\??fontfile:t:\fontstyle}\s!Serif}
75% \def\v_font_string_b{\executeifdefined{\??fontfile:a:\fontstyle}\s!Serif}
76% \def\v_font_string_c{\executeifdefined{\??fontfile:s:\fontstyle}\empty}
77% \def\v_font_string_d{\executeifdefined{\??fontfile:t:\csname\??typescriptdefaultstyles\fontclass\endcsname}\s!Serif}
78
79%D \macros
80%D   {fontstylesuffix}
81%D
82%D The next macro is used to map non latin fontnames on fonts. See \type
83%D {font-uni} for an example of its use.
84
85\def\fontstylesuffix% why the \s!Regular ? see \getglyph
86  {\ifx\fontalternative\s!tf     \s!Regular \else
87   \ifx\fontalternative\s!bf        \s!Bold \else
88   \ifx\fontalternative\s!sl     \s!Slanted \else
89   \ifx\fontalternative\s!it      \s!Italic \else
90   \ifx\fontalternative\s!bs \s!BoldSlanted \else
91   \ifx\fontalternative\s!bi  \s!BoldItalic \else
92   \ifx\fontalternative\s!sc        \s!Caps \else
93                                 \s!Regular \fi\fi\fi\fi\fi\fi\fi}%
94
95\def\glyphfontfile#base% appends
96  {#base%
97   \ifcsname\??fontfile#base\v_font_string_a\v_font_string_c\endcsname
98     \v_font_string_a\v_font_string_c
99   \else\ifcsname\??fontfile#base\v_font_string_b\v_font_string_c\endcsname
100     \v_font_string_b\v_font_string_c
101   \else\ifcsname\??fontfile#base\v_font_string_a\endcsname
102     \v_font_string_a
103   \else\ifcsname\??fontfile#base\v_font_string_b\endcsname
104     \v_font_string_b
105   \else\ifcsname\??fontfile#base\v_font_string_c\endcsname
106     \v_font_string_c
107   \fi\fi\fi\fi\fi}
108
109%D The next macro can be used to make decisions based on the shape:
110
111\def\doifelseitalic#yes#nop%
112  {\ifx\fontalternative\s!sl#yes\else
113   \ifx\fontalternative\s!it#yes\else
114   \ifx\fontalternative\s!bs#yes\else
115   \ifx\fontalternative\s!bi#yes\else#nop\fi\fi\fi\fi}
116
117\let\doifitalicelse\doifelseitalic
118
119%D For an example of usage of the following command, see \type {cont-log.tex}.
120%D
121%D \starttyping
122%D \def\symbolicfont#specification{\definedfont[\glyphfontfile{#specification} sa *]}
123%D \stoptyping
124%D
125%D Since we know what scaling it to be applied, we can implement a much faster
126%D alternative:
127
128\installcorenamespace{symbolfont}
129
130\let\thedefinedfont\relax
131
132\def\setscaledstyledsymbolicfont#1#2#3% quite a slowdown, glyphfontfile
133  {\edef\askedsymbolfont{\truefontname{\glyphfontfile{#3}} at \the\dimexpr#2\dimexpr\currentfontbodyscale\dimexpr#1}%
134   \ifcsname\??symbolfont\askedsymbolfont\endcsname
135     \lastnamedcs
136   \else
137     \font_basics_define_symbolic_font
138   \fi}
139
140\def\setscaleddirectsymbolicfont#1#2#3% quite a slowdown, glyphfontfile
141  {\edef\askedsymbolfont{\truefontname{#3} at \the\dimexpr#2\dimexpr\currentfontbodyscale\dimexpr#1}%
142   \ifcsname\??symbolfont\askedsymbolfont\endcsname
143     \lastnamedcs
144   \else
145     \font_basics_define_symbolic_font
146   \fi}
147
148\def\setstyledsymbolicfont#fontname% quite a slowdown, glyphfontfile
149  {\edef\askedsymbolfont{\truefontname{\glyphfontfile{#fontname}} at \the\dimexpr\currentfontbodyscale\dimexpr\fontbody}%
150   \ifcsname\??symbolfont\askedsymbolfont\endcsname
151     \lastnamedcs
152   \else
153     \font_basics_define_symbolic_font
154   \fi}
155
156\def\setdirectsymbolicfont#fontname%
157  {\edef\askedsymbolfont{\truefontname{#fontname} at \the\dimexpr\currentfontbodyscale\dimexpr\fontbody}%
158   \ifcsname\??symbolfont\askedsymbolfont\endcsname
159     \lastnamedcs
160   \else
161     \font_basics_define_symbolic_font
162   \fi}
163
164\def\font_basics_define_symbolic_font
165  {\definefont[currentsymbolfont][\askedsymbolfont]%
166   \currentsymbolfont
167   \expandafter\glet\csname\??symbolfont\askedsymbolfont\endcsname\lastrawfontcall}
168
169\unexpanded\def\getnamedglyphstyled#fontname#character{{\setstyledsymbolicfont{#fontname}\clf_fontchar{#character}}}
170\unexpanded\def\getnamedglyphdirect#fontname#character{{\setdirectsymbolicfont{#fontname}\clf_fontchar{#character}}}
171\unexpanded\def\getglyphstyled     #fontname#character{{\setstyledsymbolicfont{#fontname}\doifelsenumber{#character}\char\donothing#character}}
172\unexpanded\def\getglyphdirect     #fontname#character{{\setdirectsymbolicfont{#fontname}\doifelsenumber{#character}\char\donothing#character}}
173\unexpanded\def\resolvedglyphstyled#fontname#character{{\setstyledsymbolicfont{#fontname}\clf_tochar{#character}}}
174\unexpanded\def\resolvedglyphdirect#fontname#character{{\setdirectsymbolicfont{#fontname}\clf_tochar{#character}}}
175
176% this one is wrong:
177
178\unexpanded\def\getscaledglyph#scale#name#content%
179  {{\setscaledstyledsymbolicfont\fontbody{#scale}{#name}\doifelsenumber{#content}\char\donothing#content}}
180
181\let\getglyph         \getglyphstyled               % old
182\let\getrawglyph      \getglyphdirect               % old
183\let\symbolicsizedfont\setscaledstyledsymbolicfont  % old
184\let\symbolicfont     \setstyledsymbolicfont        % old
185
186\unexpanded\def\symbolicscaledfont{\setsscaledstyledsymbolicfont\fontbody}
187\unexpanded\def\symbolicscaledfont{\setscaledstyledsymbolicfont\fontbody}
188
189%D The last implementation of \type {\getglyph} permits definitions like:
190%D
191%D \starttyping
192%D \definefontsynonym [EuroSans]            [eurose]
193%D \definefontsynonym [EuroSansBold]        [euroseb]
194%D \definefontsynonym [EuroSansItalic]      [eurosei]
195%D \definefontsynonym [EuroSansSlanted]     [eurosei]
196%D \definefontsynonym [EuroSansBoldItalic]  [eurosebi]
197%D \definefontsynonym [EuroSansBoldSlanted] [eurosebi]
198%D
199%D \definesymbol [euro] [\getglyph{Euro}{\char160}]
200%D
201%D \def\euro{\symbol[euro]}
202%D \stoptyping
203%D
204%D These definitions guarantee that the next calls work okay:
205%D
206%D \starttyping
207%D \ss \tf\euro \bf\euro \sla\euro \itd\euro \bs\euro \bic\euro
208%D \stoptyping
209%D
210%D The shape as well as the size is adapted to the current environment.
211
212%D \macros
213%D   {setfont}
214%D
215%D Every now and then we want to define a font directly, for instance when we
216%D typeset title pages. The next macro saves some typing:
217
218\unexpanded\def\setfont% geen \font_helpers_set_font mogelijk
219  {\afterassignment\font_basics_set_font\font\nextfont=}
220
221\def\font_basics_set_font
222  {\nextfont\setupinterlinespace}% hm, we need to use \setuplocalinterlinespace
223
224%D One can call this macro as:
225%D
226%D \starttyping
227%D \setfont cmr10 at 60pt
228%D \stoptyping
229%D
230%D After which the font is active and the baselines and struts are set.
231
232%D \macros{doiffontcharelse}
233
234\unexpanded\def\doifelsefontchar#specification#unicode% this could be a direct lua call
235  {\begingroup
236   \font_basics_define_font_without_parameters{thedefinedfont}{#specification}%
237   \iffontchar\font#unicode\relax
238     \endgroup\expandafter\firstoftwoarguments
239   \else
240     \endgroup\expandafter\secondoftwoarguments
241   \fi}
242
243\let\doiffontcharelse\doifelsefontchar
244
245\protect \endinput
246