1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
|
%D \module
%D [ file=mp-text.mp,
%D version=2000.07.10,
%D title=\CONTEXT\ \METAPOST\ graphics,
%D subtitle=text support,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See licen-en.pdf for
%C details.
%D Under construction.
if unknown context_tool : input mp-tool ; fi ;
if known context_text : endinput ; fi ;
boolean context_text ; context_text := true ;
if unknown noftexpictures :
numeric noftexpictures ; noftexpictures := 0 ;
fi ;
if unknown texpictures[1] :
picture texpictures[] ;
fi ;
numeric textextoffset ; textextoffset := 0 ;
% vardef textext@#(expr txt) =
% interim labeloffset := textextoffset ;
% noftexpictures := noftexpictures + 1 ;
% if string txt :
% write "% figure " & decimal charcode & " : " &
% "texpictures[" & decimal noftexpictures & "] := btex " &
% txt & " etex ;" to jobname & ".mpt" ;
% if unknown texpictures[noftexpictures] :
% thelabel@#("unknown",origin)
% else :
% thelabel@#(texpictures[noftexpictures],origin)
% fi
% else :
% thelabel@#(txt,origin)
% fi
% enddef ;
boolean hobbiestextext ; hobbiestextext := false ;
% string textextstring ; textextstring := "" ;
% def resettextextdirective =
% textextstring := "" ;
% enddef ;
% def textextdirective text t =
% textextstring := textextstring & t ;
% enddef ;
vardef textext@#(expr txt) =
save _s_ ; string _s_ ;
interim labeloffset := textextoffset ;
noftexpictures := noftexpictures + 1 ;
if string txt :
% if textextstring <> "" :
% _s_ := "verbatimtex " & textextstring & " etex ;" ;
% else :
% _s_ := "" ;
% fi ;
if hobbiestextext : % the tex.mp method as fallback (see tex.mp)
% write _s_ to "mptextmp.mp" ;
write _s_ & "btex " & txt & " etex" to "mptextmp.mp" ;
write EOF to "mptextmp.mp" ;
scantokens "input mptextmp"
else :
% write "% setup : " & _s_ to jobname & ".mpt" ;
write "% figure " & decimal charcode & " : " &
"texpictures[" & decimal noftexpictures & "] := btex " &
txt & " etex ;" to jobname & ".mpt" ;
if unknown texpictures[noftexpictures] :
thelabel@#("unknown",origin)
else :
thelabel@#(texpictures[noftexpictures],origin)
fi
fi
else :
thelabel@#(txt,origin)
fi
enddef ;
string laboff_ ; laboff_ := "" ;
string laboff_c ; laboff_c := "" ;
string laboff_l ; laboff_l := ".lft" ;
string laboff_r ; laboff_r := ".rt" ;
string laboff_b ; laboff_b := ".bot" ;
string laboff_t ; laboff_t := ".top" ;
string laboff_lt ; laboff_lt := ".ulft" ;
string laboff_rt ; laboff_rt := ".urt" ;
string laboff_lb ; laboff_lb := ".llft" ;
string laboff_rb ; laboff_rb := ".lrt" ;
string laboff_tl ; laboff_tl := ".ulft" ;
string laboff_tr ; laboff_tr := ".urt" ;
string laboff_bl ; laboff_bl := ".llft" ;
string laboff_br ; laboff_br := ".lrt" ;
vardef textextstr(expr s, a) =
save ss ; string ss ;
ss := "laboff_" & a ;
ss := scantokens ss ;
ss := "textext" & ss & "(" & ditto & s & ditto & ")" ;
scantokens ss
enddef ;
pair laboff.origin ; laboff.origin = (infinity,infinity) ;
pair laboff.raw ; laboff.raw = (infinity,infinity) ;
vardef thelabel@#(expr s, z) =
save p ; picture p ;
p = s if not picture s : infont defaultfont scaled defaultscale fi ;
if laboff@#<>laboff.origin :
(p shifted (z + labeloffset*laboff@# - (labxf@#*lrcorner p +
labyf@#*ulcorner p + (1-labxf@#-labyf@#)*llcorner p)))
else :
(p shifted z)
fi
enddef;
def build_parshape (expr p, offset_or_path, dx, dy,
baselineskip, strutheight, strutdepth, topskip) =
if unknown trace_parshape :
boolean trace_parshape ; trace_parshape := false ;
fi ;
begingroup ;
save q, l, r, line, tt, bb,
n, hsize, vsize, vvsize, voffset, hoffset, width, indent,
ll, lll, rr, rrr, cp, cq, t, b ;
path q, l, r, line, tt, bb ;
numeric n, hsize, vsize, vvsize, voffset, hoffset, width[], indent[] ;
pair ll, lll, rr, rrr, cp, cq, t, b ;
n := 0 ; cp := center p ;
if path offset_or_path :
q := offset_or_path ; cq := center q ;
voffset := dy ;
hoffset := dx ;
else :
q := p ; cq := center q ;
hoffset := offset_or_path + dx ;
voffset := offset_or_path + dy ;
fi ;
hsize := xpart lrcorner q - xpart llcorner q ;
vsize := ypart urcorner q - ypart lrcorner q ;
q := p shifted - cp ;
startsavingdata ;
savedata "\global\parvoffset " & decimal voffset&"bp " ;
savedata "\global\parhoffset " & decimal hoffset&"bp " ;
savedata "\global\parwidth " & decimal hsize&"bp " ;
savedata "\global\parheight " & decimal vsize&"bp " ;
if not path offset_or_path :
q := q xscaled ((hsize-2hoffset)/hsize)
yscaled ((vsize-2voffset)/vsize) ;
fi ;
hsize := xpart lrcorner q - xpart llcorner q ;
vsize := ypart urcorner q - ypart lrcorner q ;
t := (ulcorner q -- urcorner q) intersection_point q ;
b := (llcorner q -- lrcorner q) intersection_point q ;
if xpart directionpoint t of q < 0 :
q := reverse q ;
fi ;
l := q cutbefore t ;
l := l if xpart point 0 of q < 0 : & q fi cutafter b ;
r := q cutbefore b ;
r := r if xpart point 0 of q > 0 : & q fi cutafter t ;
% tt := (ulcorner q -- urcorner q) shifted (0,-topskip) ;
% bb := (llcorner q -- lrcorner q) shifted (0,strutdepth) ;
%
% l := l cutbefore (l intersection_point tt) ;
% l := l cutafter (l intersection_point bb) ;
% r := r cutbefore (r intersection_point bb) ;
% r := r cutafter (r intersection_point tt) ;
if trace_parshape :
drawarrow p withpen pencircle scaled 2pt withcolor red ;
drawarrow l shifted cp withpen pencircle scaled 1pt withcolor green ;
drawarrow r shifted cp withpen pencircle scaled 1pt withcolor blue ;
fi ;
vardef found_point (expr lin, pat, sig) =
pair a, b ;
a := pat intersection_point (lin shifted (0,strutheight)) ;
if intersection_found :
a := a shifted (0,-strutheight) ;
else :
a := pat intersection_point lin ;
fi ;
b := pat intersection_point (lin shifted (0,-strutdepth)) ;
if intersection_found :
if sig :
if xpart b > xpart a : a := b shifted (0,strutdepth) fi ;
else :
if xpart b < xpart a : a := b shifted (0,strutdepth) fi ;
fi ;
fi ;
a
enddef ;
if (strutheight+strutdepth<baselineskip) :
vvsize := vsize ;
else :
vvsize := (vsize div baselineskip) * baselineskip ;
fi ;
for i=topskip step baselineskip until vvsize :
line := (ulcorner q -- urcorner q) shifted (0,-i-eps) ;
ll := found_point(line,l,true ) ;
rr := found_point(line,r,false) ;
if trace_parshape :
fill (ll--rr--rr shifted (0,strutheight)--ll
shifted (0,strutheight)--cycle) shifted cp withcolor .5white ;
fill (ll--rr--rr shifted (0,-strutdepth)--ll
shifted (0,-strutdepth)--cycle) shifted cp withcolor .7white ;
draw ll shifted cp withpen pencircle scaled 2pt ;
draw rr shifted cp withpen pencircle scaled 2pt ;
draw (ll--rr) shifted cp withpen pencircle scaled .5pt ;
fi ;
n := n + 1 ;
indent[n] := abs(xpart ll - xpart llcorner q) ;
width[n] := abs(xpart rr - xpart ll) ;
if (i=strutheight) and (width[n]<baselineskip) :
n := n - 1 ;
savedata "\global\chardef\parfirst=1 " ;
fi ;
endfor ;
savedata "\global\parlines " & decimal n ;
savedata "\global\partoks{ " ;
for i=1 upto n:
savedata decimal indent[i]&"bp " & decimal width[i]&"bp " ;
endfor ;
savedata "}" ;
stopsavingdata ;
endgroup ;
enddef ;
|
