ref: e02e1188e472c7e2f40fa84e839631cc54f505a0
parent: afc5d2b7f964522e35ad9023eff4c6bb213114bd
author: Sigrid Solveig Haflínudóttir <sigrid@ftrv.se>
date: Wed Sep 14 19:40:08 EDT 2022
fontsel: a font selector program
--- /dev/null
+++ b/sys/man/1/fontsel
@@ -1,0 +1,42 @@
+.TH FONTSEL 1
+.SH NAME
+fontsel \- a font selector program
+.SH SYNOPSIS
+.B fontsel
+[
+.I FILE
+]
+.SH DESCRIPTION
+.I fontsel
+scans
+.I /lib/font/bit
+and
+.I /lib/font/ttf
+for fonts and displays a text, either the default one,
+or the one specified by the user with an optional argument.
+.PP
+Font directory can be selected using middle mouse button.
+Specific font in that directory can be selected either
+.B -
+and
+.B +
+keys (bitmap fonts and TTF), or with the right mouse button
+(only for bitmap fonts).
+.PP
+Pressing
+.B q
+or
+.B del
+will exit the program and output the path to the last selected font,
+so that it's possible to select a font for a specific program in mind:
+.EX
+ font=`{fontsel} sam ...+.EE
+.SH SOURCE
+/sys/src/cmd/fontsel.c
+.SH SEE ALSO
+.IR truetypefs (4)
+.SH HISTORY
+Fontsel first appeared in 9front (September, 2022).
+.SH BUGS
+TTF.
--- /dev/null
+++ b/sys/src/cmd/fontsel.c
@@ -1,0 +1,365 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include <draw.h>
+#include <bio.h>
+#include <keyboard.h>
+#include <mouse.h>
+
+#define MIN(a,b) ((a)<=(b)?(a):(b))
+#define MAX(a,b) ((a)>=(b)?(a):(b))
+
+typedef struct Fontdir Fontdir;
+
+struct Fontdir {+ char *name;
+ char *prefix;
+ char **fonts;
+ int nfonts;
+ int isttf;
+ union {+ int ifont;
+ int sz;
+ };
+};
+
+enum
+{+ Ckey,
+ Cmouse,
+ Cresize,
+ Numchan,
+
+ Ttfdefsz = 16,
+};
+
+static char *textdef[] = {+ "Cwm fjord bank glyphs vext quiz!",
+ "Gud hjälpe Zorns mö qvickt få byxa?",
+ "Разъярённый чтец эгоистично бьёт пятью",
+ "жердями шустрого фехтовальщика.",
+ "",
+ "static int",
+ "dosomestuff(Stuff *s, char *t, int n)",
+ "{",+ " if(s == nil && (t == nil || n < 1))",
+ " return 0;",
+ " fprint(2, \"# %c\\n\", t[0]);",
+ " return dostuff(s) || dot(t, n);",
+ "}",
+ nil
+};
+
+static char **text = textdef;
+
+static char *prefixes[] = {+ "/lib/font/bit",
+ "/lib/font/ttf",
+};
+
+static Font *f;
+static Fontdir *dirs, *cdir;
+static int ndirs, idir;
+static char lasterr[256];
+int mainstacksize = 32768;
+
+static void
+redraw(void)
+{+ Point p;
+ int i, w, maxw;
+ char t[256];
+
+ lockdisplay(display);
+ draw(screen, screen->r, display->white, nil, ZP);
+ p = screen->r.min;
+
+ if(f == nil){+ p.x += Dx(screen->r)/2 - stringwidth(font, lasterr)/2;
+ p.y += Dy(screen->r)/2 - font->height/2;
+ string(screen, p, display->black, ZP, font, lasterr);
+ }else{+ maxw = 0;
+ for(i = 0; text[i] != nil; i++){+ if((w = stringwidth(f, text[i])) > maxw)
+ maxw = w;
+ }
+ p.x += Dx(screen->r)/2 - maxw/2;
+ p.y += Dy(screen->r)/2 - i*f->height/2;
+
+ for(i = 0; text[i] != nil; i++){+ string(screen, p, display->black, ZP, f, text[i]);
+ p.y += f->height;
+ }
+
+ }
+
+ if(cdir->isttf)
+ snprint(t, sizeof(t), "/n/ttf/%s.%d/font", cdir->name, cdir->sz);
+ else
+ snprint(t, sizeof(t), "%s/%s", cdir->name, cdir->fonts[cdir->ifont]);
+ p = screen->r.max;
+ p.x -= Dx(screen->r)/2 + stringwidth(font, t)/2;
+ p.y -= font->height;
+ string(screen, p, display->black, ZP, font, t);
+
+ flushimage(display, 1);
+ unlockdisplay(display);
+}
+
+static int
+fcmp(void *a, void *b)
+{+ return strcmp(*(char**)a, *(char**)b);
+}
+
+static int
+fontdir(char *t, int f, Fontdir *fdir)
+{+ Dir *d;
+ int doff, k;
+ long i, n;
+
+ k = strlen(t);
+ if(k > 4 && (cistrcmp(&t[k-4], ".ttf") == 0 || cistrcmp(&t[k-4], ".otf") == 0)){+ fdir->nfonts = 1;
+ fdir->sz = Ttfdefsz;
+ fdir->isttf = 1;
+ return 0;
+ }
+
+ if((n = dirreadall(f, &d)) < 1)
+ return -1;
+ doff = strlen(t);
+ t[doff++] = '/';
+ for(i = 0; i < n; i++){+ if((k = strlen(d[i].name)) < 5 || strcmp(&d[i].name[k-5], ".font") != 0)
+ continue;
+ if((fdir->fonts = realloc(fdir->fonts, sizeof(*fdir->fonts)*(fdir->nfonts+1))) == nil)
+ sysfatal("no memory");+ d[i].name[k-5] = 0;
+ strcpy(t+doff, d[i].name);
+ fdir->fonts[fdir->nfonts++] = strdup(t+doff);
+ }
+ free(d);
+ if(fdir->nfonts > 0)
+ qsort(fdir->fonts, fdir->nfonts, sizeof(*fdir->fonts), fcmp);
+
+ return 0;
+}
+
+static int
+dcmp(void *a_, void *b_)
+{+ Fontdir *a, *b;
+
+ a = (Fontdir*)a_;
+ b = (Fontdir*)b_;
+ return strcmp(a->name, b->name);
+}
+
+static void
+findfonts(char *prefix)
+{+ Dir *d, *din;
+ int f, fin, doff;
+ long i, n;
+ char t[1024];
+
+ doff = sprint(t, "%s", prefix);
+ t[doff++] = '/';
+ t[doff] = 0;
+ if((f = open(t, OREAD)) < 0){+ fprint(2, "font dir: %r\n");
+ return;
+ }
+ if((n = dirreadall(f, &d)) < 1){+ fprint(2, "%s: no fonts\n", t);
+ close(f);
+ return;
+ }
+ close(f);
+ for(i = 0; i < n; i++){+ strcpy(t+doff, d[i].name);
+ if((fin = open(t, OREAD)) < 0)
+ continue;
+ if((din = dirfstat(fin)) != nil){+ if((dirs = realloc(dirs, sizeof(Fontdir)*(ndirs+1))) == nil)
+ sysfatal("no memory");+ memset(&dirs[ndirs], 0, sizeof(Fontdir));
+ dirs[ndirs].prefix = prefix;
+ if(fontdir(t, fin, &dirs[ndirs]) == 0 && dirs[ndirs].nfonts > 0)
+ dirs[ndirs++].name = strdup(d[i].name);
+ free(din);
+ }
+ close(fin);
+ }
+ free(d);
+}
+
+static void
+newfont(void)
+{+ char t[512];
+
+ lockdisplay(display);
+ if(f != nil)
+ freefont(f);
+ if(cdir->isttf)
+ snprint(t, sizeof(t), "/n/ttf/%s.%d/font", cdir->name, cdir->sz);
+ else
+ snprint(t, sizeof(t), "%s/%s/%s.font", cdir->prefix, cdir->name, cdir->fonts[cdir->ifont]);
+ if((f = openfont(display, t)) == nil)
+ snprint(lasterr, sizeof(lasterr), "%r");
+ unlockdisplay(display);
+}
+
+static char *
+dirgen(int i)
+{+ return i < ndirs ? dirs[i].name : nil;
+}
+
+static char *
+fontgen(int i)
+{+ return i < cdir->nfonts ? cdir->fonts[i] : nil;
+}
+
+static void
+usage(void)
+{+ print("usage: %s [FILE]\n", argv0);+ threadexitsall("usage");+}
+
+static void
+loadtext(int f)
+{+ Biobuf b;
+ int i;
+
+ if(f < 0 || Binit(&b, f, OREAD) != 0)
+ sysfatal("loadtext: %r");+
+ text = nil;
+ for(i = 0; i < 256; i++){+ if((text = realloc(text, (i+1)*sizeof(char*))) == nil)
+ sysfatal("memory");+ if((text[i] = Brdstr(&b, '\n', 1)) == nil)
+ break;
+ }
+
+ close(f);
+}
+
+void
+threadmain(int argc, char **argv)
+{+ Mousectl *mctl;
+ Keyboardctl *kctl;
+ Rune r;
+ Mouse m;
+ Menu menu;
+ Alt a[Numchan+1] = {+ [Ckey] = {nil, &r, CHANRCV},+ [Cmouse] = {nil, &m, CHANRCV },+ [Cresize] = {nil, nil, CHANRCV},+ {nil, nil, CHANEND},+ };
+ int n;
+
+ ARGBEGIN{+ default:
+ usage();
+ break;
+ }ARGEND;
+
+ if(argc > 1)
+ usage();
+ else if(argc == 1)
+ loadtext(strcmp(argv[0], "-") == 0 ? 0 : open(argv[0], OREAD));
+
+ for(n = 0; n < nelem(prefixes); n++)
+ findfonts(prefixes[n]);
+ if(ndirs < 1)
+ sysfatal("no fonts");+ qsort(dirs, ndirs, sizeof(*dirs), dcmp);
+
+ if(initdraw(nil, nil, "fontsel") < 0)
+ sysfatal("initdraw: %r");+ if((kctl = initkeyboard(nil)) == nil)
+ sysfatal("initkeyboard: %r");+ a[Ckey].c = kctl->c;
+ if((mctl = initmouse(nil, screen)) == nil)
+ sysfatal("initmouse: %r");+ a[Cmouse].c = mctl->c;
+ a[Cresize].c = mctl->resizec;
+ display->locking = 1;
+ unlockdisplay(display);
+
+ memset(&menu, 0, sizeof(menu));
+ cdir = &dirs[0];
+ newfont();
+ redraw();
+
+ for(;;){+ switch(alt(a)){+ case -1:
+ goto end;
+
+ case Ckey:
+ switch (r) {+ case Kdel:
+ case 'q':
+ goto end;
+ case '-':
+ cdir->ifont = MAX(cdir->isttf ? 6 : 0, cdir->ifont-1);
+ newfont();
+ redraw();
+ break;
+ case '+':
+ cdir->ifont = MIN(cdir->isttf ? 256 : cdir->nfonts-1, cdir->ifont+1);
+ newfont();
+ redraw();
+ break;
+ }
+ break;
+
+ case Cmouse:
+ if(m.buttons == 2){+ menu.gen = dirgen;
+ menu.lasthit = idir;
+ if((n = menuhit(2, mctl, &menu, nil)) >= 0){+ idir = n;
+ cdir = &dirs[idir];
+ newfont();
+ redraw();
+ }
+ }else if(m.buttons == 4 && cdir->isttf == 0){+ menu.gen = fontgen;
+ menu.lasthit = cdir->ifont;
+ if((n = menuhit(3, mctl, &menu, nil)) >= 0){+ cdir->ifont = n;
+ newfont();
+ redraw();
+ }
+ }
+ break;
+
+ case Cresize:
+ getwindow(display, Refnone);
+ redraw();
+ break;
+ }
+ }
+
+end:
+ if(f != nil){+ if(cdir->isttf)
+ print("/n/ttf/%s.%d/font\n", cdir->name, cdir->sz);+ else
+ print("%s/%s/%s.font\n", cdir->prefix, cdir->name, cdir->fonts[cdir->ifont]);+ }
+ threadexitsall(nil);
+}