From c29f8c9a7888e3e4e852cfe0100974af1d9bcb05 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Sun, 31 Jan 2021 14:07:07 +0000
Subject: Add patch/winwatch-bottom

---
 patch/winwatch-bottom/email           |   1 +
 patch/winwatch-bottom/files           |   1 +
 patch/winwatch-bottom/notes           |   0
 patch/winwatch-bottom/readme          |   4 +
 patch/winwatch-bottom/winwatch.c      | 378 ++++++++++++++++++++++++++++++++++
 patch/winwatch-bottom/winwatch.c.orig | 372 +++++++++++++++++++++++++++++++++
 6 files changed, 756 insertions(+)
 create mode 100644 patch/winwatch-bottom/email
 create mode 100644 patch/winwatch-bottom/files
 create mode 100644 patch/winwatch-bottom/notes
 create mode 100644 patch/winwatch-bottom/readme
 create mode 100644 patch/winwatch-bottom/winwatch.c
 create mode 100644 patch/winwatch-bottom/winwatch.c.orig

diff --git a/patch/winwatch-bottom/email b/patch/winwatch-bottom/email
new file mode 100644
index 0000000..191feb6
--- /dev/null
+++ b/patch/winwatch-bottom/email
@@ -0,0 +1 @@
+john@ankarstrom.se
diff --git a/patch/winwatch-bottom/files b/patch/winwatch-bottom/files
new file mode 100644
index 0000000..f8d2281
--- /dev/null
+++ b/patch/winwatch-bottom/files
@@ -0,0 +1 @@
+/sys/src/cmd/winwatch.c winwatch.c
diff --git a/patch/winwatch-bottom/notes b/patch/winwatch-bottom/notes
new file mode 100644
index 0000000..e69de29
diff --git a/patch/winwatch-bottom/readme b/patch/winwatch-bottom/readme
new file mode 100644
index 0000000..2448ee3
--- /dev/null
+++ b/patch/winwatch-bottom/readme
@@ -0,0 +1,4 @@
+Move winwatch window to bottom after 3-click
+
+This makes it more pleasant to use winwatch
+as a general-purpose window switcher.
diff --git a/patch/winwatch-bottom/winwatch.c b/patch/winwatch-bottom/winwatch.c
new file mode 100644
index 0000000..893ea82
--- /dev/null
+++ b/patch/winwatch-bottom/winwatch.c
@@ -0,0 +1,378 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <cursor.h>
+#include <event.h>
+#include <regexp.h>
+#include <keyboard.h>
+
+enum {
+	VISIBLE = 1,
+	CURRENT = 2,
+};
+
+typedef struct Win Win;
+struct Win {
+	int n;
+	int dirty;
+	int state;
+	char *label;
+	Rectangle r;
+};
+
+Reprog  *exclude  = nil;
+Win *win;
+int nwin;
+int mwin;
+int onwin;
+int rows, cols;
+Image *lightblue;
+Image *statecol[4];
+
+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;
+}
+
+int
+readfile(char *buf, int nbuf, char *file, ...)
+{
+	va_list arg;
+	int n, fd;
+
+	va_start(arg, file);
+	vsnprint(buf, nbuf, file, arg);
+	va_end(arg);
+
+	if((fd = open(buf, OREAD)) < 0){
+		buf[0] = 0;
+		return -1;
+	}
+	n = read(fd, buf, nbuf-1);
+	close(fd);
+	if(n < 0){
+		buf[0] = 0;
+		return -1;
+	}
+	buf[n] = 0;
+	return n;
+}
+
+void
+refreshwin(void)
+{
+	char label[128], wctl[128], *tok[8];
+	int i, fd, n, nr, nw, state;
+	static int mywinid = -1;
+	Dir *pd;
+
+	if(mywinid < 0){
+		if(readfile(wctl, sizeof(wctl), "/dev/winid") > 0)
+			mywinid = atoi(wctl);
+	}
+
+	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);
+			if(n == mywinid)
+				continue;
+			if(readfile(label, sizeof(label), "/dev/wsys/%d/label", n) < 0)
+				continue;
+			if(exclude != nil && regexec(exclude,label,nil,0))
+				continue;
+			if(readfile(wctl, sizeof(wctl), "/dev/wsys/%d/wctl", n) <= 0)
+				continue;
+			if(tokenize(wctl, tok, nelem(tok)) != 6)
+				continue;
+			state = 0;
+			if(strcmp(tok[4], "current") == 0)
+				state |= CURRENT;
+			if(strcmp(tok[5], "visible") == 0)
+				state |= VISIBLE;
+			if(nw < nwin && win[nw].n == n && win[nw].state == state && 
+			   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].state = state;
+			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, statecol[win[i].state], 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 <= 0)
+		rows = 1;
+	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);
+}
+
+int
+label(Win w, Mouse m)
+{
+	char buf[512], fname[128];
+	int n, fd;
+
+	snprint(buf, sizeof(buf), "%s", w.label);
+	n = eenter(nil, buf, sizeof(buf), &m);
+	if(n <= 0)
+		return 0;
+	sprint(fname, "/dev/wsys/%d/label", w.n);
+	if((fd = open(fname, OWRITE)) < 0)
+		return 0;
+	write(fd, buf, n);
+	close(fd);
+	refreshwin();
+	redraw(screen, 1);
+	return 1;
+}
+
+int
+unhide(Win w)
+{
+	char buf[128];
+	int fd;
+
+	sprint(buf, "/dev/wsys/%d/wctl", w.n);
+	if((fd = open(buf, OWRITE)) < 0)
+		return 0;
+	if(w.state == (CURRENT|VISIBLE))
+		write(fd, "hide\n", 5);
+	else {
+		write(fd, "unhide\n", 7);
+		write(fd, "top\n", 4);
+		write(fd, "current\n", 8);
+	}
+	close(fd);
+
+	if((fd = open("/dev/wctl", OWRITE)) < 0)
+		return 0;
+	write(fd, "bottom\n", 7);
+	close(fd);
+
+	return 1;
+}
+
+int
+click(Mouse m)
+{
+	int i, b;
+
+	b = m.buttons & 7;
+	if(b != 2 && b != 4)
+		return 0;
+	for(i=0; i<nwin; i++)
+		if(ptinrect(m.xy, win[i].r))
+			break;
+	if(i == nwin)
+		return 0;
+	do
+		m = emouse();
+	while((m.buttons & 7) == b);
+	if((m.buttons & 7) || !ptinrect(m.xy, win[i].r))
+		return 0;
+
+	switch(b) {
+	case 2:
+		return label(win[i], m);
+	case 4:
+		return unhide(win[i]);
+	default:
+		return 0;
+	}
+}
+
+void
+usage(void)
+{
+	fprint(2, "usage: winwatch [-e exclude] [-f font]\n");
+	exits("usage");
+}
+
+void
+main(int argc, char **argv)
+{
+	char *fontname = nil;
+	int Etimer;
+	Event e;
+	int i;
+
+	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();
+
+	if(initdraw(0, fontname, "winwatch") < 0)
+		sysfatal("initdraw: %r");
+	lightblue = allocimagemix(display, DPalebluegreen, DWhite);
+
+	statecol[0] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0xCCCCCCFF);
+	statecol[1] = lightblue;
+	statecol[2] = lightblue;
+	statecol[3] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DPalegreygreen);
+
+	for(i=0; i<nelem(statecol); i++)
+		if(statecol[i] == nil)
+			sysfatal("allocimage: %r");
+
+	refreshwin();
+	redraw(screen, 1);
+	einit(Emouse|Ekeyboard);
+	Etimer = etimer(0, 2500);
+
+	for(;;){
+		switch(eread(Emouse|Ekeyboard|Etimer, &e)){
+		case Ekeyboard:
+			if(e.kbdc==Kdel || e.kbdc=='q')
+				exits(0);
+			break;
+		case Emouse:
+			if(click(e.mouse) == 0)
+				continue;
+			/* fall through  */
+		default:	/* Etimer */
+			refreshwin();
+			redraw(screen, 0);
+			break;
+		}
+	}
+}
diff --git a/patch/winwatch-bottom/winwatch.c.orig b/patch/winwatch-bottom/winwatch.c.orig
new file mode 100644
index 0000000..988a7cb
--- /dev/null
+++ b/patch/winwatch-bottom/winwatch.c.orig
@@ -0,0 +1,372 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <cursor.h>
+#include <event.h>
+#include <regexp.h>
+#include <keyboard.h>
+
+enum {
+	VISIBLE = 1,
+	CURRENT = 2,
+};
+
+typedef struct Win Win;
+struct Win {
+	int n;
+	int dirty;
+	int state;
+	char *label;
+	Rectangle r;
+};
+
+Reprog  *exclude  = nil;
+Win *win;
+int nwin;
+int mwin;
+int onwin;
+int rows, cols;
+Image *lightblue;
+Image *statecol[4];
+
+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;
+}
+
+int
+readfile(char *buf, int nbuf, char *file, ...)
+{
+	va_list arg;
+	int n, fd;
+
+	va_start(arg, file);
+	vsnprint(buf, nbuf, file, arg);
+	va_end(arg);
+
+	if((fd = open(buf, OREAD)) < 0){
+		buf[0] = 0;
+		return -1;
+	}
+	n = read(fd, buf, nbuf-1);
+	close(fd);
+	if(n < 0){
+		buf[0] = 0;
+		return -1;
+	}
+	buf[n] = 0;
+	return n;
+}
+
+void
+refreshwin(void)
+{
+	char label[128], wctl[128], *tok[8];
+	int i, fd, n, nr, nw, state;
+	static int mywinid = -1;
+	Dir *pd;
+
+	if(mywinid < 0){
+		if(readfile(wctl, sizeof(wctl), "/dev/winid") > 0)
+			mywinid = atoi(wctl);
+	}
+
+	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);
+			if(n == mywinid)
+				continue;
+			if(readfile(label, sizeof(label), "/dev/wsys/%d/label", n) < 0)
+				continue;
+			if(exclude != nil && regexec(exclude,label,nil,0))
+				continue;
+			if(readfile(wctl, sizeof(wctl), "/dev/wsys/%d/wctl", n) <= 0)
+				continue;
+			if(tokenize(wctl, tok, nelem(tok)) != 6)
+				continue;
+			state = 0;
+			if(strcmp(tok[4], "current") == 0)
+				state |= CURRENT;
+			if(strcmp(tok[5], "visible") == 0)
+				state |= VISIBLE;
+			if(nw < nwin && win[nw].n == n && win[nw].state == state && 
+			   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].state = state;
+			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, statecol[win[i].state], 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 <= 0)
+		rows = 1;
+	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);
+}
+
+int
+label(Win w, Mouse m)
+{
+	char buf[512], fname[128];
+	int n, fd;
+
+	snprint(buf, sizeof(buf), "%s", w.label);
+	n = eenter(nil, buf, sizeof(buf), &m);
+	if(n <= 0)
+		return 0;
+	sprint(fname, "/dev/wsys/%d/label", w.n);
+	if((fd = open(fname, OWRITE)) < 0)
+		return 0;
+	write(fd, buf, n);
+	close(fd);
+	refreshwin();
+	redraw(screen, 1);
+	return 1;
+}
+
+int
+unhide(Win w)
+{
+	char buf[128];
+	int fd;
+
+	sprint(buf, "/dev/wsys/%d/wctl", w.n);
+	if((fd = open(buf, OWRITE)) < 0)
+		return 0;
+	if(w.state == (CURRENT|VISIBLE))
+		write(fd, "hide\n", 5);
+	else {
+		write(fd, "unhide\n", 7);
+		write(fd, "top\n", 4);
+		write(fd, "current\n", 8);
+	}
+	close(fd);
+	return 1;
+}
+
+int
+click(Mouse m)
+{
+	int i, b;
+
+	b = m.buttons & 7;
+	if(b != 2 && b != 4)
+		return 0;
+	for(i=0; i<nwin; i++)
+		if(ptinrect(m.xy, win[i].r))
+			break;
+	if(i == nwin)
+		return 0;
+	do
+		m = emouse();
+	while((m.buttons & 7) == b);
+	if((m.buttons & 7) || !ptinrect(m.xy, win[i].r))
+		return 0;
+
+	switch(b) {
+	case 2:
+		return label(win[i], m);
+	case 4:
+		return unhide(win[i]);
+	default:
+		return 0;
+	}
+}
+
+void
+usage(void)
+{
+	fprint(2, "usage: winwatch [-e exclude] [-f font]\n");
+	exits("usage");
+}
+
+void
+main(int argc, char **argv)
+{
+	char *fontname = nil;
+	int Etimer;
+	Event e;
+	int i;
+
+	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();
+
+	if(initdraw(0, fontname, "winwatch") < 0)
+		sysfatal("initdraw: %r");
+	lightblue = allocimagemix(display, DPalebluegreen, DWhite);
+
+	statecol[0] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, 0xCCCCCCFF);
+	statecol[1] = lightblue;
+	statecol[2] = lightblue;
+	statecol[3] = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DPalegreygreen);
+
+	for(i=0; i<nelem(statecol); i++)
+		if(statecol[i] == nil)
+			sysfatal("allocimage: %r");
+
+	refreshwin();
+	redraw(screen, 1);
+	einit(Emouse|Ekeyboard);
+	Etimer = etimer(0, 2500);
+
+	for(;;){
+		switch(eread(Emouse|Ekeyboard|Etimer, &e)){
+		case Ekeyboard:
+			if(e.kbdc==Kdel || e.kbdc=='q')
+				exits(0);
+			break;
+		case Emouse:
+			if(click(e.mouse) == 0)
+				continue;
+			/* fall through  */
+		default:	/* Etimer */
+			refreshwin();
+			redraw(screen, 0);
+			break;
+		}
+	}
+}
-- 
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