Import sources from 2011-03-30 iso image

1 files changed, 737 insertions, 0 deletions

diff --git a/sys/src/libcontrol/group.c b/sys/src/libcontrol/group.c
new file mode 100755
index 000000000..1d13f2f68
--- /dev/null
+++ b/sys/src/libcontrol/group.c
@@ -0,0 +1,737 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include <draw.h>
+#include <mouse.h>
+#include <keyboard.h>
+#include <control.h>
+#include "group.h"
+
+static int debug = 0;
+static int debugm = 0;
+static int debugr = 0;
+
+enum{
+	EAdd,
+	EBorder,
+	EBordercolor,
+	EFocus,
+	EHide,
+	EImage,
+	ERect,
+	ERemove,
+	EReveal,
+	ESeparation,
+	EShow,
+	ESize,
+};
+
+static char *cmds[] = {
+	[EAdd] =			"add",
+	[EBorder] =		"border",
+	[EBordercolor] =	"bordercolor",
+	[EFocus] = 		"focus",
+	[EHide] =			"hide",
+	[EImage] =		"image",
+	[ERect] =			"rect",
+	[ERemove] =		"remove",
+	[EReveal] =		"reveal",
+	[ESeparation] =		"separation",
+	[EShow] =			"show",
+	[ESize] =			"size",
+};
+
+static void		boxboxresize(Group*, Rectangle);
+static void		columnresize(Group*, Rectangle);
+static void		groupctl(Control *c, CParse *cp);
+static void		groupfree(Control*);
+static void		groupmouse(Control *, Mouse *);
+static void		groupsize(Control *c);
+static void		removegroup(Group*, int);
+static void		rowresize(Group*, Rectangle);
+static void		stackresize(Group*, Rectangle);
+
+static void
+groupinit(Group *g)
+{
+	g->bordercolor = _getctlimage("black");
+	g->image = _getctlimage("white");
+	g->border = 0;
+	g->mansize = 0;
+	g->separation = 0;
+	g->selected = -1;
+	g->lastkid = -1;
+	g->kids = nil;
+	g->separators = nil;
+	g->nkids = 0;
+	g->nseparators = 0;
+	g->ctl = groupctl;
+	g->mouse = groupmouse;
+	g->exit = groupfree;
+}
+
+static void
+groupctl(Control *c, CParse *cp)
+{
+	int cmd, i, n;
+	
+	Rectangle r;
+	Group *g;
+
+	g = (Group*)c;
+	cmd = _ctllookup(cp->args[0], cmds, nelem(cmds));
+	switch(cmd){
+	case EAdd:
+		for (i = 1; i < cp->nargs; i++){
+			c = controlcalled(cp->args[i]);
+			if (c == nil)
+				ctlerror("%q: no such control: %s", g->name, cp->args[i]);
+			_ctladdgroup(g, c);
+		}
+		if (g->setsize)
+			g->setsize((Control*)g);
+		break;
+	case EBorder:
+		_ctlargcount(g, cp, 2);
+		if(cp->iargs[1] < 0)
+			ctlerror("%q: bad border: %c", g->name, cp->str);
+		g->border = cp->iargs[1];
+		break;
+	case EBordercolor:
+		_ctlargcount(g, cp, 2);
+		_setctlimage(g, &g->bordercolor, cp->args[1]);
+		break;
+	case EFocus:
+		/* ignore focus change */
+		break;
+	case EHide:
+		_ctlargcount(g, cp, 1);
+		for (i = 0; i < g->nkids; i++)
+			if (g->kids[i]->ctl)
+				_ctlprint(g->kids[i], "hide");
+		g->hidden = 1;
+		break;
+	case EImage:
+		_ctlargcount(g, cp, 2);
+		_setctlimage(g, &g->image, cp->args[1]);
+		break;
+	case ERect:
+		_ctlargcount(g, cp, 5);
+		r.min.x = cp->iargs[1];
+		r.min.y = cp->iargs[2];
+		r.max.x = cp->iargs[3];
+		r.max.y = cp->iargs[4];
+		if(Dx(r)<=0 || Dy(r)<=0)
+			ctlerror("%q: bad rectangle: %s", g->name, cp->str);
+		g->rect = r;
+		r = insetrect(r, g->border);
+		if (g->nkids == 0)
+			return;
+		switch(g->type){
+		case Ctlboxbox:
+			boxboxresize(g, r);
+			break;
+		case Ctlcolumn:
+			columnresize(g, r);
+			break;
+		case Ctlrow:
+			rowresize(g, r);
+			break;
+		case Ctlstack:
+			stackresize(g, r);
+			break;
+		}
+		break;
+	case ERemove:
+		_ctlargcount(g, cp, 2);
+		for (n = 0; n < g->nkids; n++)
+			if (strcmp(cp->args[1], g->kids[n]->name) == 0)
+				break;
+		if (n == g->nkids)
+			ctlerror("%s: remove nonexistent control: %q", g->name, cp->args[1]);
+		removegroup(g, n);
+		if (g->setsize)
+			g->setsize((Control*)g);
+		break;
+	case EReveal:
+		g->hidden = 0;
+		if (debugr) fprint(2, "reveal %s\n", g->name);
+		if (g->type == Ctlstack){
+			if (cp->nargs == 2){
+				if (cp->iargs[1] < 0 || cp->iargs[1] >= g->nkids)
+					ctlerror("%s: control out of range: %q", g->name, cp->str);
+				g->selected = cp->iargs[1];
+			}else
+				_ctlargcount(g, cp, 1);
+			for (i = 0; i < g->nkids; i++)
+				if (g->kids[i]->ctl){
+					if (g->selected == i){
+						if (debugr) fprint(2, "reveal %s: reveal kid %s\n", g->name, g->kids[i]->name);
+						_ctlprint(g->kids[i], "reveal");
+					}else{
+						if (debugr) fprint(2, "reveal %s: hide kid %s\n", g->name, g->kids[i]->name);
+						_ctlprint(g->kids[i], "hide");
+					}
+				}
+			break;
+		}
+		_ctlargcount(g, cp, 1);
+		if (debug) fprint(2, "reveal %s: border %R/%d\n", g->name, g->rect, g->border);
+		border(g->screen, g->rect, g->border, g->bordercolor->image, g->bordercolor->image->r.min);
+		r = insetrect(g->rect, g->border);
+		if (debug) fprint(2, "reveal %s: draw %R\n", g->name, r);
+		draw(g->screen, r, g->image->image, nil, g->image->image->r.min);
+		for (i = 0; i < g->nkids; i++)
+			if (g->kids[i]->ctl)
+				_ctlprint(g->kids[i], "reveal");
+		break;
+	case EShow:
+		_ctlargcount(g, cp, 1);
+		if (g->hidden)
+			break;
+		// pass it on to the kiddies
+		if (debug) fprint(2, "show %s: border %R/%d\n", g->name, g->rect, g->border);
+		border(g->screen, g->rect, g->border, g->bordercolor->image, g->bordercolor->image->r.min);
+		r = insetrect(g->rect, g->border);
+		if (debug) fprint(2, "show %s: draw %R\n", g->name, r);
+		draw(g->screen, r, g->image->image, nil, g->image->image->r.min);
+		for (i = 0; i < g->nkids; i++)
+			if (g->kids[i]->ctl){
+				if (debug) fprint(2, "show %s: kid %s: %q\n", g->name, g->kids[i]->name, cp->str);
+				_ctlprint(g->kids[i], "show");
+			}
+		flushimage(display, 1);
+		break;
+	case ESize:
+		r.max = Pt(_Ctlmaxsize, _Ctlmaxsize);
+		if (g->type == Ctlboxbox)
+			_ctlargcount(g, cp, 5);
+		switch(cp->nargs){
+		default:
+			ctlerror("%s: args of %q", g->name, cp->str);
+		case 1:
+			/* recursively set size */
+			g->mansize = 0;
+			if (g->setsize)
+				g->setsize((Control*)g);
+			break;
+		case 5:
+			_ctlargcount(g, cp, 5);
+			r.max.x = cp->iargs[3];
+			r.max.y = cp->iargs[4];
+			/* fall through */
+		case 3:
+			r.min.x = cp->iargs[1];
+			r.min.y = cp->iargs[2];
+			if(r.min.x<=0 || r.min.y<=0 || r.max.x<=0 || r.max.y<=0 || r.max.x < r.min.x || r.max.y < r.min.y)
+			ctlerror("%q: bad sizes: %s", g->name, cp->str);
+			g->size = r;
+			g->mansize = 1;
+			break;
+		}
+		break;
+	case ESeparation:
+		if (g->type != Ctlstack){
+			_ctlargcount(g, cp, 2);
+			if(cp->iargs[1] < 0)
+				ctlerror("%q: illegal value: %c", g->name, cp->str);
+			g->separation = cp->iargs[1];
+			break;
+		}
+		// fall through for Ctlstack
+	default:
+		ctlerror("%q: unrecognized message '%s'", g->name, cp->str);
+		break;
+	}
+}
+
+static void
+groupfree(Control *c)
+{
+	Group *g;
+
+	g = (Group*)c;
+	_putctlimage(g->bordercolor);
+	free(g->kids);
+}
+
+static void
+groupmouse(Control *c, Mouse *m)
+{
+	Group *g;
+	int i, lastkid;
+
+	g = (Group*)c;
+	if (g->type == Ctlstack){
+		i = g->selected;
+		if (i >= 0 && g->kids[i]->mouse &&
+                        ( ( ((m->buttons == 0) || (g->lastbut == 0)) &&
+                           ptinrect(m->xy, g->kids[i]->rect) ) ||
+                         ( ((m->buttons != 0) || (g->lastbut != 0)) &&
+		         (g->lastkid == i) ) ) ) {
+			if (debugm) fprint(2, "groupmouse %s mouse kid %s i=%d lastkid=%d buttons=%d lastbut=%d inrect=%d\n",
+						g->name, g->kids[i]->name, i, g->lastkid, m->buttons, g->lastbut,
+						ptinrect(m->xy, g->kids[i]->rect) ? 1 : 0);
+			(g->kids[i]->mouse)(g->kids[i], m);
+			g->lastkid = i;
+			g->lastbut = m->buttons;
+		} else {
+			if (debugm) fprint(2, "groupmouse %s skip kid %s i=%d lastkid=%d buttons=%d lastbut=%d inrect=%d\n",
+						g->name, g->kids[i]->name, i, g->lastkid, m->buttons, g->lastbut,
+						ptinrect(m->xy, g->kids[i]->rect) ? 1 : 0);
+		}
+		return;
+	}
+
+	lastkid = -1;
+	for(i=0; i<g->nkids; i++) {
+		if(g->kids[i]->mouse &&
+                      ( ( ((m->buttons == 0) || (g->lastbut == 0)) &&
+                           ptinrect(m->xy, g->kids[i]->rect) ) ||
+                        ( ((m->buttons != 0) || (g->lastbut != 0)) &&
+		         (g->lastkid == i) ) ) ) {
+			if (debugm) fprint(2, "groupmouse %s mouse kid %s i=%d lastkid=%d buttons=%d lastbut=%d inrect=%d\n",
+						g->name, g->kids[i]->name, i, g->lastkid, m->buttons, g->lastbut,
+						ptinrect(m->xy, g->kids[i]->rect) ? 1 : 0);
+			(g->kids[i]->mouse)(g->kids[i], m);
+			lastkid = i;
+		} else {
+			if (debugm) fprint(2, "groupmouse %s skip kid %s i=%d lastkid=%d buttons=%d lastbut=%d inrect=%d\n",
+						g->name, g->kids[i]->name, i, g->lastkid, m->buttons, g->lastbut,
+						ptinrect(m->xy, g->kids[i]->rect) ? 1 : 0);
+		}
+	}
+	g->lastkid = lastkid;
+	g->lastbut = m->buttons;
+
+#ifdef notdef
+	if(m->buttons == 0){
+		/* buttons now up */
+		g->lastbut = 0;
+		return;
+	}
+	if(g->lastbut == 0 && m->buttons != 0){
+		/* button went down, start tracking border */
+		switch(g->stacking){
+		default:
+			return;
+		case Vertical:
+			p = Pt(m->xy.x, middle_of_border.y);
+			p0 = Pt(g->r.min.x, m->xy.y);
+			p1 = Pt(g->r.max.x, m->xy.y);
+			break;
+		case Horizontal:
+			p = Pt(middle_of_border.x, m->xy.y);
+			p0 = Pt(m->xy.x, g->r.min.y);
+			p1 = Pt(m->xy.x, g->r.max.y);
+			break;
+		}
+	//	setcursor();
+		oi = nil;
+	} else if (g->lastbut != 0 && s->m.buttons != 0){
+		/* button is down, keep tracking border */
+		if(!eqpt(s->m.xy, p)){
+			p = onscreen(s->m.xy);
+			r = canonrect(Rpt(p0, p));
+			if(Dx(r)>5 && Dy(r)>5){
+				i = allocwindow(wscreen, r, Refnone, 0xEEEEEEFF); /* grey */
+				freeimage(oi);
+				if(i == nil)
+					goto Rescue;
+				oi = i;
+				border(i, r, Selborder, red, ZP);
+				flushimage(display, 1);
+			}
+		}
+	} else if (g->lastbut != 0 && s->m.buttons == 0){
+		/* button went up, resize kiddies */
+	}
+	g->lastbut = s->m.buttons;
+#endif
+}
+
+static void
+activategroup(Control *c, int act)
+{
+	int i;
+	Group *g;
+
+	g = (Group*)c;
+	for (i = 0; i < g->nkids; i++)
+		if (act)
+			activate(g->kids[i]);
+		else
+			deactivate(g->kids[i]);
+}
+
+Control *
+createrow(Controlset *cs, char *name)
+{
+	Control *c;
+	c = _createctl(cs, "row", sizeof(Group), name);
+	groupinit((Group*)c);
+	c->setsize = groupsize;
+	c->activate = activategroup;
+	return c;
+}
+
+Control *
+createcolumn(Controlset *cs, char *name)
+{
+	Control *c;
+	c = _createctl(cs, "column", sizeof(Group), name);
+	groupinit((Group*)c);
+	c->setsize = groupsize;
+	c->activate = activategroup;
+	return c;
+}
+
+Control *
+createboxbox(Controlset *cs, char *name)
+{
+	Control *c;
+	c = _createctl(cs, "boxbox", sizeof(Group), name);
+	groupinit((Group*)c);
+	c->activate = activategroup;
+	return c;
+}
+
+Control *
+createstack(Controlset *cs, char *name)
+{
+	Control *c;
+	c = _createctl(cs, "stack", sizeof(Group), name);
+	groupinit((Group*)c);
+	c->setsize = groupsize;
+	return c;
+}
+
+void
+_ctladdgroup(Control *c, Control *q)
+{
+	Group *g = (Group*)c;
+
+	g->kids = ctlrealloc(g->kids, sizeof(Group*)*(g->nkids+1));
+	g->kids[g->nkids++] = q;
+}
+
+static void
+removegroup(Group *g, int n)
+{
+	int i;
+
+	if (g->selected == n)
+		g->selected = -1;
+	else if (g->selected > n)
+		g->selected--;
+
+	for (i = n+1; i < g->nkids; i++)
+		g->kids[i-1] = g->kids[i];
+	g->nkids--;
+}
+
+static void
+groupsize(Control *c)
+{
+	Rectangle r;
+	int i;
+	Control *q;
+	Group *g;
+
+	g = (Group*)c;
+	assert(g->type == Ctlcolumn || g->type == Ctlrow || g->type == Ctlstack);
+	if (g->mansize) return;
+	r = Rect(1, 1, 1, 1);
+	if (debug) fprint(2, "groupsize %q\n", g->name);
+	for (i = 0; i < g->nkids; i++){
+		q = g->kids[i];
+		if (q->setsize)
+			q->setsize(q);
+		if (q->size.min.x == 0 || q->size.min.y == 0 || q->size.max.x == 0 || q->size.max.y == 0)
+			ctlerror("%q: bad size %R", q->name, q->size);
+		if (debug) fprint(2, "groupsize %q: [%d %q]: %R\n", g->name, i, q->name, q->size);
+		switch(g->type){
+		case Ctlrow:
+			if (i)
+				r.min.x += q->size.min.x + g->border;
+			else
+				r.min.x = q->size.min.x;
+			if (i)
+				r.max.x += q->size.max.x + g->border;
+			else
+				r.max.x = q->size.max.x;
+			if (r.min.y < q->size.min.y) r.min.y = q->size.min.y;
+			if (r.max.y < q->size.max.y) r.max.y = q->size.max.y;
+			break;
+		case Ctlcolumn:
+			if (r.min.x < q->size.min.x) r.min.x = q->size.min.x;
+			if (r.max.x < q->size.max.x) r.max.x = q->size.max.x;
+			if (i)
+				r.min.y += q->size.min.y + g->border;
+			else
+				r.min.y = q->size.min.y;
+			if (i)
+				r.max.y += q->size.max.y + g->border;
+			else
+				r.max.y = q->size.max.y;
+			break;
+		case Ctlstack:
+			if (r.min.x < q->size.min.x) r.min.x = q->size.min.x;
+			if (r.max.x < q->size.max.x) r.max.x = q->size.max.x;
+			if (r.min.y < q->size.min.y) r.min.y = q->size.min.y;
+			if (r.max.y < q->size.max.y) r.max.y = q->size.max.y;
+			break;
+		}
+	}
+	g->size = rectaddpt(r, Pt(g->border, g->border));
+	if (debug) fprint(2, "groupsize %q: %R\n", g->name, g->size);
+}
+
+static void
+boxboxresize(Group *g, Rectangle r)
+{
+	int rows, cols, ht, wid, i, hpad, wpad;
+	Rectangle rr;
+
+	if(debug) fprint(2, "boxboxresize %q %R (%d×%d) min/max %R separation %d\n", g->name, r, Dx(r), Dy(r), g->size, g->separation);
+	ht = 0;
+	for(i=0; i<g->nkids; i++){
+		if (g->kids[i]->size.min.y > ht)
+			ht = g->kids[i]->size.min.y;
+	}
+	if (ht == 0)
+		ctlerror("boxboxresize: height");
+	rows = Dy(r) / (ht+g->separation);
+	hpad = (Dy(r) % (ht+g->separation)) / g->nkids;
+	cols = (g->nkids+rows-1)/rows;
+	wid = Dx(r) / cols - g->separation;
+	for(i=0; i<g->nkids; i++){
+		if (g->kids[i]->size.max.x < wid)
+			wid = g->kids[i]->size.max.x;
+	}
+	for(i=0; i<g->nkids; i++){
+		if (g->kids[i]->size.min.x > wid)
+			wid = g->kids[i]->size.min.x;
+	}
+	if (wid > Dx(r) / cols)
+		ctlerror("can't fit controls in boxbox");
+	wpad = (Dx(r) % (wid+g->separation)) / g->nkids;
+	rr = rectaddpt(Rect(0,0,wid, ht), addpt(r.min, Pt(g->separation/2, g->separation/2)));
+	if(debug) fprint(2, "boxboxresize rows %d, cols %d, wid %d, ht %d, wpad %d, hpad %d\n", rows, cols, wid, ht, wpad, hpad);
+	for(i=0; i<g->nkids; i++){
+		if(debug) fprint(2, "	%d %q: %R (%d×%d)\n", i, g->kids[i]->name, rr, Dx(rr), Dy(rr));
+		_ctlprint(g->kids[i], "rect %R",
+			rectaddpt(rr, Pt((wpad+wid+g->separation)*(i/rows), (hpad+ht+g->separation)*(i%rows))));
+	}
+	g->nseparators = rows + cols - 2;
+	g->separators = realloc(g->separators, g->nseparators*sizeof(Rectangle));
+	rr = r;
+	rr.max.y = rr.min.y + g->separation+hpad;
+	for (i = 1; i < rows; i++){
+		g->separators[i-1] = rectaddpt(rr, Pt(0, (hpad+ht+g->separation)*i-g->separation-hpad));
+		if(debug) fprint(2, "row separation %d [%d]: %R\n", i, i-1, rectaddpt(rr, Pt(0, (hpad+ht+g->separation)*i-g->separation)));
+	}
+	rr = r;
+	rr.max.x = rr.min.x + g->separation+wpad;
+	for (i = 1; i < cols; i++){
+		g->separators[i+rows-2] = rectaddpt(rr, Pt((wpad+wid+g->separation)*i-g->separation-wpad, 0));
+		if(debug) fprint(2, "col separation %d [%d]: %R\n", i, i+rows-2, rectaddpt(rr, Pt((wpad+wid+g->separation)*i-g->separation, 0)));
+	}
+}
+
+static void
+columnresize(Group *g, Rectangle r)
+{
+	int x, y, *d, *p, i, j, t;
+	Rectangle rr;
+	Control *q;
+
+	x = Dx(r);
+	y = Dy(r);
+	if(debug) fprint(2, "columnresize %q %R (%d×%d) min/max %R separation %d\n", g->name, r, Dx(r), Dy(r), g->size, g->separation);
+	if (x < g->size.min.x) {
+		werrstr("resize %s: too narrow: need %d, have %d", g->name, g->size.min.x, x);
+		r.max.x = r.min.x + g->size.min.x;
+	}
+	if (y < g->size.min.y) {
+		werrstr("resize %s: too short: need %d, have %d", g->name, g->size.min.y, y);
+		r.max.y = r.min.y + g->size.min.y;
+		y = Dy(r);
+	}
+	d = ctlmalloc(g->nkids*sizeof(int));
+	p = ctlmalloc(g->nkids*sizeof(int));
+	if(debug) fprint(2, "kiddies: ");
+	for (i = 0; i < g->nkids; i++) {
+		q = g->kids[i];
+		if(debug) fprint(2, "[%q]: %d⋯%d\t", q->name, q->size.min.y, q->size.max.y);
+		d[i] = q->size.min.y;
+		y -= d[i];
+		p[i] = q->size.max.y - q->size.min.y;
+	}
+	if(debug) fprint(2, "\n");
+	y -= (g->nkids-1) * g->separation;
+	if(y < 0){
+		if (debug) fprint(2, "columnresize: y == %d\n", y);
+		y = 0;
+	}
+	if (y >= g->size.max.y - g->size.min.y) {
+		// all rects can be maximum width
+		for (i = 0; i < g->nkids; i++)
+			d[i] += p[i];
+		y -= g->size.max.y - g->size.min.y;
+	} else {
+		// rects can't be max width, divide up the rest
+		j = y;
+		for (i = 0; i < g->nkids; i++) {
+			t = p[i] * y/(g->size.max.y - g->size.min.y);
+			d[i] += t;
+			j -= t;
+		}
+		d[0] += j;
+		y = 0;
+	}
+	g->nseparators = g->nkids-1;
+	g->separators = realloc(g->separators, g->nseparators*sizeof(Rectangle));
+	j = 0;
+	rr = r;
+	for (i = 0; i < g->nkids; i++) {
+		q = g->kids[i];
+		if (i < g->nkids - 1){
+			g->separators[i].min.x = r.min.x;
+			g->separators[i].max.x = r.max.x;
+		}
+		t = y / (g->nkids - i);
+		y -= t;
+		j += t/2;
+		rr.min.y = r.min.y + j;
+		if (i)
+			g->separators[i-1].max.y = rr.min.y;
+		j += d[i];
+		rr.max.y = r.min.y + j;
+		if (i < g->nkids - 1)
+			g->separators[i].min.y = rr.max.y;
+		j += g->separation + t - t/2;
+		_ctlprint(q, "rect %R", rr);
+		if(debug) fprint(2, "	%d %q: %R (%d×%d)\n", i, q->name, rr, Dx(rr), Dy(rr));
+	}
+	free(d);
+	free(p);
+}
+
+static void
+rowresize(Group *g, Rectangle r)
+{
+	int x, y, *d, *p, i, j, t;
+	Rectangle rr;
+	Control *q;
+
+	x = Dx(r);
+	y = Dy(r);
+	if(debug) fprint(2, "rowresize %q %R (%d×%d), separation %d\n", g->name, r, Dx(r), Dy(r), g->separation);
+	if (x < g->size.min.x) {
+		werrstr("resize %s: too narrow: need %d, have %d", g->name, g->size.min.x, x);
+		r.max.x = r.min.x + g->size.min.x;
+		x = Dx(r);
+	}
+	if (y < g->size.min.y) {
+		werrstr("resize %s: too short: need %d, have %d", g->name, g->size.min.y, y);
+		r.max.y = r.min.y + g->size.min.y;
+	}
+	d = ctlmalloc(g->nkids*sizeof(int));
+	p = ctlmalloc(g->nkids*sizeof(int));
+	if(debug) fprint(2, "kiddies: ");
+	for (i = 0; i < g->nkids; i++) {
+		q = g->kids[i];
+		if(debug) fprint(2, "[%q]: %d⋯%d\t", q->name, q->size.min.x, q->size.max.x);
+		d[i] = q->size.min.x;
+		x -= d[i];
+		p[i] = q->size.max.x - q->size.min.x;
+	}
+	if(debug) fprint(2, "\n");
+	x -= (g->nkids-1) * g->separation;
+	if(x < 0){
+		if (debug) fprint(2, "rowresize: x == %d\n", x);
+		x = 0;
+	}
+	if (x >= g->size.max.x - g->size.min.x) {
+		if (debug) fprint(2, "max: %d > %d - %d", x, g->size.max.x, g->size.min.x);
+		// all rects can be maximum width
+		for (i = 0; i < g->nkids; i++)
+			d[i] += p[i];
+		x -= g->size.max.x - g->size.min.x;
+	} else {
+		if (debug) fprint(2, "divvie up: %d < %d - %d", x, g->size.max.x, g->size.min.x);
+		// rects can't be max width, divide up the rest
+		j = x;
+		for (i = 0; i < g->nkids; i++) {
+			t = p[i] * x/(g->size.max.x - g->size.min.x);
+			d[i] += t;
+			j -= t;
+		}
+		d[0] += j;
+		x = 0;
+	}
+	j = 0;
+	g->nseparators = g->nkids-1;
+	g->separators = realloc(g->separators, g->nseparators*sizeof(Rectangle));
+	rr = r;
+	for (i = 0; i < g->nkids; i++) {
+		q = g->kids[i];
+		if (i < g->nkids - 1){
+			g->separators[i].min.y = r.min.y;
+			g->separators[i].max.y = r.max.y;
+		}
+		t = x / (g->nkids - i);
+		x -= t;
+		j += t/2;
+		rr.min.x = r.min.x + j;
+		if (i)
+			g->separators[i-1].max.x = rr.min.x;
+		j += d[i];
+		rr.max.x = r.min.x + j;
+		if (i < g->nkids - 1)
+			g->separators[i].min.x = rr.max.x;
+		j += g->separation + t - t/2;
+		_ctlprint(q, "rect %R", rr);
+		if(debug) fprint(2, "	%d %q: %R (%d×%d)\n", i, q->name, rr, Dx(rr), Dy(rr));
+	}
+	free(d);
+	free(p);
+}
+
+static void
+stackresize(Group *g, Rectangle r)
+{
+	int x, y, i;
+	Control *q;
+
+	x = Dx(r);
+	y = Dy(r);
+	if(debug) fprint(2, "stackresize %q %R (%d×%d)\n", g->name, r, Dx(r), Dy(r));
+	if (x < g->size.min.x){
+		werrstr("resize %s: too narrow: need %d, have %d", g->name, g->size.min.x, x);
+		return;
+	}
+	if (y < g->size.min.y){
+		werrstr("resize %s: too short: need %d, have %d", g->name, g->size.min.y, y);
+		return;
+	}
+	if (x > g->size.max.x) {
+		x = (x - g->size.max.x)/2;
+		r.min.x += x;
+		r.max.x -= x;
+	}
+	if (y > g->size.max.y) {
+		y = (y - g->size.max.y)/2;
+		r.min.y += y;
+		r.max.y -= y;
+	}
+	for (i = 0; i < g->nkids; i++){
+		q = g->kids[i];
+		if(debug) fprint(2, "	%d %q: %R (%d×%d)\n", i, q->name, r, Dx(r), Dy(r));
+	}
+	for (i = 0; i < g->nkids; i++){
+		q = g->kids[i];
+		_ctlprint(q, "rect %R", r);
+	}
+}