shithub: dmenu

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working implementation without scrolling support

--- a/linesel.c

+++ /dev/null

@@ -1,188 +1,0 @@

-#include <u.h>

-#include <libc.h>

-#include <bio.h>

-#include <draw.h>

-#include <event.h>

-#include <keyboard.h>

-

-#define Ctl(c) ((c) - 64)

-

-Image *fgcolor, *bgcolor;

-char **lines, **matches, *buffer,  *selected;

-usize nlines, nmatches;

-Rune kbinput[512];

-

-static void

-readbuffer(void)

-{

-	Biobuf *bp;

-	char *line, *s;

-

-	if((bp = Bfdopen(0, OREAD)) == nil)

-		sysfatal("setting buffering on fd0: %r");

-	if ((buffer = Brdstr(bp, '\0', 1)) == nil)

-		sysfatal("reading input lines: %r");

-

-	for(line = s = buffer; s = strchr(s, '\n'); line = ++s){

-		*s = '\0';

-		if((lines = realloc(lines, ++nlines * sizeof *lines)) == nil)

-			sysfatal("malloc: %r");

-		lines[nlines-1] = line;

-	}

-	if((matches = malloc(nlines * sizeof *lines)) == nil)

-		sysfatal("malloc: %r");

-}

-

-#define PROMPT "  > "

-

-static void

-redraw(Image *screen)

-{

-	short fh = font->height;

-	Point pt = screen->r.min;

-	usize i;

-	char buf[512];

-

-	draw(screen, screen->r, bgcolor, nil, ZP);

-

-	pt = addpt(pt, Pt(0, fh));

-	snprint(buf, sizeof buf, PROMPT"%S▏", kbinput);

-	string(screen, pt, fgcolor, ZP, font, buf);	

-	pt = addpt(pt, Pt(stringwidth(font, PROMPT), fh));

-

-	for(i = 0; i < nmatches; i++){

-		if (pt.y > screen->r.max.y)

-			break;

-		string(screen, pt, fgcolor, ZP, font, matches[i]);

-		pt = addpt(pt, Pt(0, fh));

-	}

-}

-

-static void

-resetmatches(void)

-{

-	memmove(matches, lines, nlines * sizeof *lines);

-	nmatches = nlines;

-}

-

-static void

-kbadd(Rune r)

-{

-	usize len = runestrlen(kbinput);

-

-	if (len == sizeof kbinput / sizeof *kbinput)

-		return;

-	kbinput[len++] = r;

-	kbinput[len] = L'\0';

-}

-

-static void

-kbbackspace(void)

-{

-	usize len = runestrlen(kbinput);

-

-	if (len == 0)

-		return;

-	kbinput[len - 1] = L'\0';

-}

-

-static void

-kbdelword(void)

-{

-	usize len = runestrlen(kbinput);

-

-	if(len == 0)

-		return;

-	while(len > 0 && isspacerune(kbinput[len-1]))

-		len--;

-	while(len > 0 && !isspacerune(kbinput[len-1]))

-		len--;

-	kbinput[len] = L'\0';

-}

-

-static void

-kbclear(void)

-{

-	kbinput[0] = L'\0';

-}

-

-void

-eresized(int new)

-{

-	if(new && getwindow(display, Refnone) < 0)

-		sysfatal("resize failed: %r");

-	redraw(screen);

-}

-

-static void

-usage(void)

-{

-	print("usage: %s [-b] <choices\n", argv0);

-	exits("usage");

-}

-

-void

-main(int argc, char **argv)

-{

-	Event e;

-	int bflag = 0;

-

-	ARGBEGIN{

-	case 'b':

-		bflag = 1;

-		break;

-	default:

-		usage();

-	}ARGEND;

-

-	readbuffer();

-	resetmatches();

-	selected = matches[0];

-

-	if(initdraw(nil, nil, "linesel") < 0)

-		sysfatal("initdraw: %r");

-	if(bflag){

-		fgcolor = display->white;

-		bgcolor = display->black;

-	}else{

-		fgcolor = display->black;

-		bgcolor = display->white;

-	}

-	einit(Emouse|Ekeyboard);

-	redraw(screen);

-

-	for(;;){

-		switch(event(&e)){

-		case -1:

-			sysfatal("watching channels: %r\n");

-

-		case Ekeyboard:

-			switch(e.kbdc){

-			case Kdel:

-				exits("interrupted with Del");

-			case '\n':

-				goto End;

-			case Kbs:

-				kbbackspace();

-				break;

-			case Ctl('W'):

-				kbdelword();

-				break;

-			case Ctl('U'):

-				kbclear();

-				break;

-			default:

-				kbadd(e.kbdc);

-				break;

-			}

-			redraw(screen);

-			break;

-

-		case Emouse:

-			break;

-		}

-	}

-End:

-	print("%s\n", selected);

-	exits(nil);

-}

--- a/mkfile

+++ b/mkfile

@@ -1,6 +1,14 @@

 </$objtype/mkfile

-TARG=linesel

-OFILES=linesel.$O

+TARG=\

+	line\

+

 HFILES=

-</sys/src/cmd/mkone

+

+LIB= /$objtype/lib/libdraw.a

+BIN= /$objtype/bin/sel

+MAN= /sys/man/1

+

+</sys/src/cmd/mkmany

+

+install:V: $MAN/$TARG