ref: 0c36c79e9b58b5131d4911b05ede987ce0bb8bde
dir: /sys/src/cmd/eqn/tuning.c/
#include "e.h"
/*
This file contains parameter values for many of the
tuning parameters in eqn. Names are defined words.
Strings are plugged in verbatim.
Floats are usually in ems.
*/
/* In main.c: */
double BeforeSub = 1.2; /* line space before a subscript */
double AfterSub = 0.2; /* line space after a subscript */
/* diacrit.c: */
double Dvshift = 0.25; /* vertical shift for diacriticals on tall letters */
double Dhshift = 0.025; /* horizontal shift for tall letters */
double Dh2shift = 0.05; /* horizontal shift for small letters */
double Dheight = 0.25; /* increment to height for diacriticals */
double Barv = 0.68; /* vertical shift for bar */
double Barh = 0.05; /* 1/2 horizontal shrink for bar */
double Ubarv = 0.1; /* shift underbar up this much ems */
double Ubarh = 0.05; /* 1/2 horizontal shrink for underbar */
/* Also:
Vec, Dyad, Hat, Tilde, Dot, Dotdot, Utilde */
/* eqnbox.c: */
char *IRspace = "\\^"; /* space between italic & roman boxes */
/* fat.c: */
double Fatshift = 0.05; /* fattening shifts by Fatshift ems */
/* funny.c: */
int Funnyps = 5; /* point size change (== 5 above) */
double Funnyht = 0.2; /* height correction */
double Funnybase = 0.3; /* base correction */
/* integral.c: */
int Intps = 4; /* point size change for integral (== 4 above) */
double Intht = 1.15; /* ht of integral in ems */
double Intbase = 0.3; /* base in ems */
double Int1h = 0.4; /* lower limit left */
double Int1v = 0.2; /* lower limit down */
double Int2h = 0.05; /* upper limit right was 8 */
double Int2v = 0.1; /* upper limit up */
/* matrix.c: */
char *Matspace = "\\ \\ "; /* space between matrix columns */
/* over.c: */
double Overgap = 0.3; /* gap between num and denom */
double Overwid = 0.5; /* extra width of box */
double Overline = 0.1; /* extra length of fraction bar */
/* paren.c* */
double Parenbase = 0.4; /* shift of base for even count */
double Parenshift = 0.13; /* how much to shift parens down in left ... */
/* ignored unless postscript */
double Parenheight = 0.3; /* extra height above builtups */
/* pile.c: */
double Pilegap = 0.4; /* gap between pile elems */
double Pilebase = 0.5; /* shift base of even # of piled elems */
/* shift.c: */
double Subbase = 0.2; /* subscript base belowe main base */
double Supshift = 0.4; /* superscript .4 up main box */
char *Sub1space = "\\|"; /* italic sub roman space */
char *Sup1space = "\\|"; /* italic sup roman space */
char *Sub2space = "\\^"; /* space after subscripted thing */
char *SS1space = "\\^"; /* space before sub in x sub i sup j */
char *SS2space = "\\^"; /* space before sup */
/* sqrt.c: */
/* sqrt is hard! punt for now. */
/* part of the problem is that every typesetter does it differently */
/* and we have several typesetters to run. */
/* text.c: */
/* ought to be done by a table */
struct tune {
char *name;
char *cval;
} tune[] ={
/* diacrit.c */
"vec_def", "\\f1\\v'-.5m'\\s-3\\(->\\s0\\v'.5m'\\fP", /* was \s-2 & .45m */
"dyad_def", "\\f1\\v'-.5m'\\s-3\\z\\(<-\\|\\(->\\s0\\v'.5m'\\fP",
"hat_def", "\\f1\\v'-.05m'\\s+1^\\s0\\v'.05m'\\fP", /* was .1 */
"tilde_def", "\\f1\\v'-.05m'\\s+1~\\s0\\v'.05m'\\fP",
"dot_def", "\\f1\\v'-.67m'.\\v'.67m'\\fP",
"dotdot_def", "\\f1\\v'-.67m'..\\v'.67m'\\fP",
"utilde_def", "\\f1\\v'1.0m'\\s+2~\\s-2\\v'-1.0m'\\fP",
/* funny.c */
"sum_def", "\\|\\v'.3m'\\s+5\\(*S\\s-5\\v'-.3m'\\|",
"union_def", "\\|\\v'.3m'\\s+5\\(cu\\s-5\\v'-.3m'\\|",
"inter_def", "\\|\\v'.3m'\\s+5\\(ca\\s-5\\v'-.3m'\\|",
"prod_def", "\\|\\v'.3m'\\s+5\\(*P\\s-5\\v'-.3m'\\|",
/* integral.c */
"int_def", "\\v'.1m'\\s+4\\(is\\s-4\\v'-.1m'",
0, 0
};
tbl *ftunetbl[TBLSIZE]; /* user-defined names */
char *ftunes[] ={ /* this table intentionally left small */
"Subbase",
"Supshift",
0
};
void init_tune(void)
{
int i;
for (i = 0; tune[i].name != NULL; i++)
install(deftbl, tune[i].name, tune[i].cval, 0);
for (i = 0; ftunes[i] != NULL; i++)
install(ftunetbl, ftunes[i], (char *) 0, 0);
}
#define eq(s, t) (strcmp(s,t) == 0)
void ftune(char *s, char *t) /* brute force for now */
{
double f = atof(t);
double *target;
while (*t == ' ' || *t == '\t')
t++;
if (eq(s, "Subbase"))
target = &Subbase;
else if (eq(s, "Supshift"))
target = &Supshift;
if (t[0] == '+' || t[0] == '-')
*target += f;
else
*target = f;
}