code: drawterm

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drawterm: implement window resize for gui-x11 and gui-win32

--- a/gui-win32/screen.c

+++ b/gui-win32/screen.c

@@ -83,6 +83,7 @@

 	dy = GetDeviceCaps(GetDC(NULL), VERTRES);

 	gscreen = allocmemimage(Rect(0,0,dx,dy), fmt);

+	gscreen->clipr = ZR;

 	kproc("winscreen", winproc, 0);

 	ksleep(&rend, isready, 0);

 }

@@ -90,7 +91,7 @@

 uchar*

 attachscreen(Rectangle *r, ulong *chan, int *depth, int *width, int *softscreen)

 {

-	*r = gscreen->r;

+	*r = gscreen->clipr;

 	*chan = gscreen->chan;

 	*depth = gscreen->depth;

 	*width = gscreen->width;

@@ -111,7 +112,6 @@

 {

 	int dx, dy, delx;

 	HDC hdc;

-	RECT winr;

 	if(depth != gscreen->depth)

 		panic("screenload: bad ldepth");

@@ -121,13 +121,8 @@

 	 * screen to the negative axes, for example, when

 	 * dragging around a window border in a Move operation.

 	 */

-	if(rectclip(&r, gscreen->r) == 0)

+	if(rectclip(&r, gscreen->clipr) == 0)

 		return;

-	if(GetWindowRect(window, &winr)==0)

-		return;

-	if(rectclip(&r, Rect(0, 0, winr.right-winr.left, winr.bottom-winr.top))==0)

-		return;

-

 	if((step&3) != 0 || ((pt.x*depth)%32) != 0 || ((ulong)p&3) != 0)

 		panic("screenload: bad params %d %d %ux", step, pt.x, p);

@@ -344,6 +339,7 @@

 	HDC hdc;

 	LONG x, y, b;

 	int i;

+	RECT winr;

 	Rectangle r;

 	Rune k;

@@ -352,6 +348,7 @@

 	switch(msg) {

 	case WM_CREATE:

 		break;

+

 	case WM_SETCURSOR:

 		/* User set */

 		if(hcursor != NULL) {

@@ -444,6 +441,22 @@

 		flushmemscreen(r);

 		EndPaint(hwnd, &paint);

 		break;

+

+	case WM_SIZE:

+		if(GetClientRect(hwnd, &winr) == 0)

+			break;

+		r = Rect(0, 0, winr.right - winr.left, winr.bottom - winr.top);

+		if(rectclip(&r, gscreen->r) == 0 || badrect(r))

+			break;

+		qlock(&drawlock);

+		gscreen->clipr = r;

+		qunlock(&drawlock);

+		screenwin();

+		deletescreenimage();

+		resetscreenimage();

+		mouseresize();

+		break;

+

 	case WM_COMMAND:

 	case WM_SETFOCUS:

 	case WM_DEVMODECHANGE:

--- a/gui-x11/x11.c

+++ b/gui-x11/x11.c

@@ -120,6 +120,7 @@

 static	Drawable	xdrawable;

 static	void		xexpose(XEvent*);

+static	void		xresize(XEvent*);

 static	void		xmouse(XEvent*);

 static	void		xkeyboard(XEvent*);

 static	void		xmapping(XEvent*);

@@ -146,7 +147,7 @@

 	uchar *p;

 	assert(!canqlock(&drawlock));

-	if(r.min.x >= r.max.x || r.min.y >= r.max.y)

+	if(rectclip(&r, gscreen->clipr) == 0)

 		return;

 	if(xtblbit && gscreen->chan == CMAP8)

@@ -176,7 +177,7 @@

 	memimageinit();

 	terminit();

 	qlock(&drawlock);

-	flushmemscreen(gscreen->r);

+	flushmemscreen(gscreen->clipr);

 	qunlock(&drawlock);

 }

@@ -183,7 +184,7 @@

 uchar*

 attachscreen(Rectangle *r, ulong *chan, int *depth, int *width, int *softscreen)

 {

-	*r = gscreen->r;

+	*r = gscreen->clipr;

 	*chan = gscreen->chan;

 	*depth = gscreen->depth;

 	*width = gscreen->width;

@@ -294,6 +295,7 @@

 		xselect(&event, xkmcon);

 		xkeyboard(&event);

 		xmouse(&event);

+		xresize(&event);

 		xexpose(&event);

 		xmapping(&event);

 		xdestroy(&event);

@@ -480,6 +482,7 @@

 	xscreenid = XCreatePixmap(xdisplay, xdrawable, Dx(r), Dy(r), xscreendepth);

 	gscreen = xallocmemimage(r, xscreenchan, xscreenid, &xscreenimage);

+	gscreen->clipr = Rect(0,0,xsize,ysize);

 	xgccopy = creategc(xscreenid);

 	xkmcon = XOpenDisplay(NULL);

@@ -647,6 +650,25 @@

 	xe = (XDestroyWindowEvent*)e;

 	if(xe->window == xdrawable)

 		exit(0);

+}

+

+static void

+xresize(XEvent *e)

+{

+	Rectangle r;

+

+	if(e->type != ConfigureNotify)

+		return;

+	r = Rect(0, 0, ((XConfigureEvent*)e)->width, ((XConfigureEvent*)e)->height);

+	if(rectclip(&r, gscreen->r) == 0 || badrect(r) || eqrect(r, gscreen->clipr))

+		return;

+	qlock(&drawlock);

+	gscreen->clipr = r;

+	qunlock(&drawlock);

+	screenwin();

+	deletescreenimage();

+	resetscreenimage();

+	mouseresize();

 }

 static void

--- a/kern/devmouse.c

+++ b/kern/devmouse.c

@@ -96,6 +96,7 @@

 	case Qmouse:

 		if(tas(&mouse.open) != 0)

 			error(Einuse);

+		mouse.resize = 0;

 		mouse.lastcounter = mouse.state.counter;

 		break;

 	}

@@ -170,6 +171,10 @@

 			m.xy.x, m.xy.y, b, m.msec);

 		mouse.lastcounter = m.counter;

+		if(mouse.resize){

+			mouse.resize = 0;

+			buf[0] = 'r';

+		}

 		if(n > 1+4*12)

 			n = 1+4*12;

@@ -304,11 +309,21 @@

 	return -1;

 }

+/*

+ * notify reader that screen has been resized

+ */

+void

+mouseresize(void)

+{

+	mouse.resize = 1;

+	wakeup(&mouse.r);

+}

+

 int

 mousechanged(void *a)

 {

 	USED(a);

-	return mouse.lastcounter != mouse.state.counter;

+	return mouse.lastcounter != mouse.state.counter || mouse.resize;

 }

 void

--- a/kern/screen.h

+++ b/kern/screen.h

@@ -14,6 +14,7 @@

 	Lock		lk;

 	Mousestate	state;

 	ulong		lastcounter;

+	int		resize;		/* generate resize event */

 	Rendez		r;

 	int		open;

 	Mousestate	queue[16];	/* circular buffer of click events */

@@ -50,11 +51,15 @@

 void	mouseset(Point);

 void	flushmemscreen(Rectangle);

 uchar*	attachscreen(Rectangle*, ulong*, int*, int*, int*);

+void	deletescreenimage(void);

+void	resetscreenimage(void);

 extern	QLock drawlock;

 #define	ishwimage(i)	0

 void	terminit(void);

+void	screenwin(void);

+void	mouseresize(void);

 void	mousetrack(int, int, int, ulong);

 void	absmousetrack(int, int, int, ulong);

--- a/kern/term.c

+++ b/kern/term.c

@@ -47,7 +47,7 @@

 		combinerect(&flushr, r);

 }

-static void

+void

 screenwin(void)

 {

 	Point p;

@@ -61,10 +61,7 @@

 	h = memdefont->height;

-	window.min = addpt(gscreen->r.min, Pt(20,20));

-	window.max.x = window.min.x + Dx(gscreen->r)*3/4-40;

-	window.max.y = window.min.y + Dy(gscreen->r)*3/4-100;

-

+	window = insetrect(gscreen->clipr, 20);

 	memimagedraw(gscreen, window, memblack, ZP, memopaque, ZP, S);

 	window = insetrect(window, 4);

 	memimagedraw(gscreen, window, memwhite, ZP, memopaque, ZP, S);