From e5888a1ffdae813d7575f5fb02275c6bb07e5199 Mon Sep 17 00:00:00 2001
From: Taru Karttunen <taruti@taruti.net>
Date: Wed, 30 Mar 2011 15:46:40 +0300
Subject: Import sources from 2011-03-30 iso image

---
 sys/src/cmd/winwatch.c | 295 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 295 insertions(+)
 create mode 100755 sys/src/cmd/winwatch.c

(limited to 'sys/src/cmd/winwatch.c')

diff --git a/sys/src/cmd/winwatch.c b/sys/src/cmd/winwatch.c
new file mode 100755
index 000000000..0f5a9c4e8
--- /dev/null
+++ b/sys/src/cmd/winwatch.c
@@ -0,0 +1,295 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <event.h>
+#include <regexp.h>
+
+typedef struct Win Win;
+struct Win {
+	int n;
+	int dirty;
+	char *label;
+	Rectangle r;
+};
+
+
+
+Reprog  *exclude  = nil;
+Win *win;
+int nwin;
+int mwin;
+int onwin;
+int rows, cols;
+Font *font;
+Image *lightblue;
+
+enum {
+	PAD = 3,
+	MARGIN = 5
+};
+
+void*
+erealloc(void *v, ulong n)
+{
+	v = realloc(v, n);
+	if(v == nil)
+		sysfatal("out of memory reallocating %lud", n);
+	return v;
+}
+
+void*
+emalloc(ulong n)
+{
+	void *v;
+
+	v = malloc(n);
+	if(v == nil)
+		sysfatal("out of memory allocating %lud", n);
+	memset(v, 0, n);
+	return v;
+}
+
+char*
+estrdup(char *s)
+{
+	int l;
+	char *t;
+
+	if (s == nil)
+		return nil;
+	l = strlen(s)+1;
+	t = emalloc(l);
+	memcpy(t, s, l);
+
+	return t;
+}
+
+
+void
+refreshwin(void)
+{
+	char label[128];
+	int i, fd, lfd, n, nr, nw, m;
+	Dir *pd;
+
+	if((fd = open("/dev/wsys", OREAD)) < 0)
+		return;
+
+	nw = 0;
+/* i'd rather read one at a time but rio won't let me */
+	while((nr=dirread(fd, &pd)) > 0){
+		for(i=0; i<nr; i++){
+			n = atoi(pd[i].name);
+			sprint(label, "/dev/wsys/%d/label", n);
+			if((lfd = open(label, OREAD)) < 0)
+				continue;
+			m = read(lfd, label, sizeof(label)-1);
+			close(lfd);
+			if(m < 0)
+				continue;
+			label[m] = '\0';
+			if(exclude != nil && regexec(exclude,label,nil,0))
+				continue;
+
+			if(nw < nwin && win[nw].n == n && strcmp(win[nw].label, label)==0){
+				nw++;
+				continue;
+			}
+	
+			if(nw < nwin){
+				free(win[nw].label);
+				win[nw].label = nil;
+			}
+			
+			if(nw >= mwin){
+				mwin += 8;
+				win = erealloc(win, mwin*sizeof(win[0]));
+			}
+			win[nw].n = n;
+			win[nw].label = estrdup(label);
+			win[nw].dirty = 1;
+			win[nw].r = Rect(0,0,0,0);
+			nw++;
+		}
+		free(pd);
+	}
+	while(nwin > nw)
+		free(win[--nwin].label);
+	nwin = nw;
+	close(fd);
+}
+
+void
+drawnowin(int i)
+{
+	Rectangle r;
+
+	r = Rect(0,0,(Dx(screen->r)-2*MARGIN+PAD)/cols-PAD, font->height);
+	r = rectaddpt(rectaddpt(r, Pt(MARGIN+(PAD+Dx(r))*(i/rows),
+				MARGIN+(PAD+Dy(r))*(i%rows))), screen->r.min);
+	draw(screen, insetrect(r, -1), lightblue, nil, ZP);
+}
+
+void
+drawwin(int i)
+{
+	draw(screen, win[i].r, lightblue, nil, ZP);
+	_string(screen, addpt(win[i].r.min, Pt(2,0)), display->black, ZP,
+		font, win[i].label, nil, strlen(win[i].label), 
+		win[i].r, nil, ZP, SoverD);
+	border(screen, win[i].r, 1, display->black, ZP);	
+	win[i].dirty = 0;
+}
+
+int
+geometry(void)
+{
+	int i, ncols, z;
+	Rectangle r;
+
+	z = 0;
+	rows = (Dy(screen->r)-2*MARGIN+PAD)/(font->height+PAD);
+	if(rows*cols < nwin || rows*cols >= nwin*2){
+		ncols = nwin <= 0 ? 1 : (nwin+rows-1)/rows;
+		if(ncols != cols){
+			cols = ncols;
+			z = 1;
+		}
+	}
+
+	r = Rect(0,0,(Dx(screen->r)-2*MARGIN+PAD)/cols-PAD, font->height);
+	for(i=0; i<nwin; i++)
+		win[i].r = rectaddpt(rectaddpt(r, Pt(MARGIN+(PAD+Dx(r))*(i/rows),
+					MARGIN+(PAD+Dy(r))*(i%rows))), screen->r.min);
+
+	return z;
+}
+
+void
+redraw(Image *screen, int all)
+{
+	int i;
+
+	all |= geometry();
+	if(all)
+		draw(screen, screen->r, lightblue, nil, ZP);
+	for(i=0; i<nwin; i++)
+		if(all || win[i].dirty)
+			drawwin(i);
+	if(!all)
+		for(; i<onwin; i++)
+			drawnowin(i);
+
+	onwin = nwin;
+}
+
+void
+eresized(int new)
+{
+	if(new && getwindow(display, Refmesg) < 0)
+		fprint(2,"can't reattach to window");
+	geometry();
+	redraw(screen, 1);
+}
+
+void
+click(Mouse m)
+{
+	int fd, i, j;	
+	char buf[128];
+
+	if(m.buttons == 0 || (m.buttons & ~4))
+		return;
+
+	for(i=0; i<nwin; i++)
+		if(ptinrect(m.xy, win[i].r))
+			break;
+	if(i == nwin)
+		return;
+
+	do
+		m = emouse();
+	while(m.buttons == 4);
+
+	if(m.buttons != 0){
+		do
+			m = emouse();
+		while(m.buttons);
+		return;
+	}
+
+	for(j=0; j<nwin; j++)
+		if(ptinrect(m.xy, win[j].r))
+			break;
+	if(j != i)
+		return;
+
+	sprint(buf, "/dev/wsys/%d/wctl", win[i].n);
+	if((fd = open(buf, OWRITE)) < 0)
+		return;
+	write(fd, "unhide\n", 7);
+	write(fd, "top\n", 4);
+	write(fd, "current\n", 8);
+	close(fd);
+}
+
+void
+usage(void)
+{
+	fprint(2, "usage: winwatch [-e exclude] [-f font]\n");
+	exits("usage");
+}
+
+void
+main(int argc, char **argv)
+{
+	char *fontname;
+	int Etimer;
+	Event e;
+
+	fontname = "/lib/font/bit/lucidasans/unicode.8.font";
+	ARGBEGIN{
+	case 'f':
+		fontname = EARGF(usage());
+		break;
+	case 'e':
+		exclude = regcomp(EARGF(usage()));
+		if(exclude == nil)
+			sysfatal("Bad regexp");
+		break;
+	default:
+		usage();
+	}ARGEND
+
+	if(argc)
+		usage();
+
+	initdraw(0, 0, "winwatch");
+	lightblue = allocimagemix(display, DPalebluegreen, DWhite);
+	if(lightblue == nil)
+		sysfatal("allocimagemix: %r");
+	if((font = openfont(display, fontname)) == nil)
+		sysfatal("font '%s' not found", fontname);
+
+	refreshwin();
+	redraw(screen, 1);
+	einit(Emouse|Ekeyboard);
+	Etimer = etimer(0, 2500);
+
+	for(;;){
+		switch(eread(Emouse|Ekeyboard|Etimer, &e)){
+		case Ekeyboard:
+			if(e.kbdc==0x7F || e.kbdc=='q')
+				exits(0);
+			break;
+		case Emouse:
+			if(e.mouse.buttons)
+				click(e.mouse);
+			/* fall through  */
+		default:	/* Etimer */
+			refreshwin();
+			redraw(screen, 0);
+			break;
+		}
+	}
+}
-- 
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