Imported Debian patch 1.1.1+rev1355-1debian/1.1.1+rev1355-1

1 files changed, 1156 insertions, 0 deletions

diff --git a/util/alevt/xio.c b/util/alevt/xio.c
new file mode 100644
index 0000000..4c0bca2
--- /dev/null
+++ b/util/alevt/xio.c
@@ -0,0 +1,1156 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xatom.h>
+#define XK_MISCELLANY
+#define XK_LATIN1
+#include <X11/keysymdef.h>
+#include <sys/time.h>
+#include "vt.h"
+#include "misc.h"
+#include "dllist.h"
+#include "xio.h"
+#include "fdset.h"
+#include "lang.h"
+#include "icon.xbm"
+#include "font.h"
+
+#define WW (W*CW) /* pixel width of window */
+#define WH (H*CH) /* pixel hegiht of window */
+#define NO_SEL 999 /* sel_y1 value if no selection */
+#define SEL_MIN_TIME 500 /* anything shorter is a click */
+
+static struct dl_head dpys[1]; /* list of all displays */
+static void xio_timer(void *data, int fd);
+static void handle_event(struct xio *xio, int fd);
+
+
+static int timer_init(int argc, char **argv)
+{
+    int p[2], timer_pid, i;
+
+    if (pipe(p) == -1)
+    return -1;
+
+    signal(SIGPIPE, SIG_DFL);
+    timer_pid = fork();
+    if (timer_pid == -1)
+    return -1;
+    if (timer_pid > 0)
+    {
+    fdset_add_fd(fds, p[0], xio_timer, 0);
+    close(p[1]);
+    return 0;
+    }
+
+    close(p[0]);
+    for (i = 0; i < 32; ++i)
+    if (p[1] != i)
+    close(i);
+    memcpy(argv[0], "Timer", 6);
+
+    for (;;)
+    {
+    usleep(300000);
+    write(p[1], "*", 1);
+    }
+}
+
+
+static int local_init(int argc, char **argv)
+{
+    static int inited = 0;
+
+    if (inited)
+	return 0;
+
+    if (timer_init(argc, argv) == -1)
+	return -1;
+
+    dl_init(dpys);
+
+    inited = 1;
+    return 0;
+}
+
+
+static int get_colors(struct xio *xio)
+{
+    int i;
+    XColor c;
+
+    static short rgb[][3] =
+    {
+	{ 0x0000,0x0000,0x0000 },
+	{ 0xffff,0x0000,0x0000 },
+	{ 0x0000,0xffff,0x0000 },
+	{ 0xffff,0xffff,0x0000 },
+	{ 0x0000,0x0000,0xffff },
+	{ 0xffff,0x0000,0xffff },
+	{ 0x0000,0xffff,0xffff },
+	{ 0xffff,0xffff,0xffff },
+	{ 0x7fff,0x7fff,0x7fff },
+	{ 0x7fff,0x0000,0x0000 },
+	{ 0x0000,0x7fff,0x0000 },
+	{ 0x7fff,0x7fff,0x0000 },
+	{ 0x0000,0x0000,0x7fff },
+	{ 0x7fff,0x0000,0x7fff },
+	{ 0x0000,0x7fff,0x7fff },
+	{ 0x3fff,0x3fff,0x3fff },
+    };
+
+    for (i = 0; i < 16; ++i)
+    {
+	c.red = rgb[i][0];
+	c.green = rgb[i][1];
+	c.blue = rgb[i][2];
+	if (XAllocColor(xio->dpy, xio->cmap, &c) == 0)
+	    return -1;
+	xio->color[i] = c.pixel;
+    }
+    return 0;
+}
+
+
+static int get_fonts(struct xio *xio)
+{
+    GC gc;
+    int i;
+    unsigned char *font_bits;
+    switch(latin1) {
+        case LATIN1: font_bits=font1_bits; break;
+        case LATIN2: font_bits=font2_bits; break;
+        case KOI8: font_bits=font3_bits; break;
+        case GREEK: font_bits=font4_bits; break;
+        default: font_bits=font1_bits; break;
+    }
+
+    xio->font[0] = XCreateBitmapFromData(xio->dpy, xio->root,
+					 font_bits, font_width, font_height);
+    xio->font[1] = XCreatePixmap(xio->dpy, xio->root,
+    					font_width, font_height*2, 1);
+    gc = XCreateGC(xio->dpy, xio->font[0], 0, 0);
+    for (i = 0; i < font_height; ++i)
+    {
+	XCopyArea(xio->dpy, xio->font[0], xio->font[1], gc, 0, i,
+						    font_width, 1, 0, i*2);
+	XCopyArea(xio->dpy, xio->font[0], xio->font[1], gc, 0, i,
+						    font_width, 1, 0, i*2+1);
+    }
+    XFreeGC(xio->dpy, gc);
+    return 0;
+}
+
+
+static void xlib_conn_watch(Display *dpy, void *fds, int fd, int open_flag, void *data)
+{
+    if (open_flag)
+	fdset_add_fd(fds, fd, XProcessInternalConnection, dpy);
+    else
+	fdset_del_fd(fds, fd);
+}
+
+
+struct xio * xio_open_dpy(char *dpy, int argc, char **argv)
+{
+    XClassHint classhint[1];
+    struct xio *xio;
+
+    if (local_init(argc, argv) == -1)
+	goto fail1;
+    
+    if (not(xio = malloc(sizeof(*xio))))
+	goto fail1;
+
+    if (not(xio->dpy = XOpenDisplay(dpy)))
+	goto fail2;
+
+    xio->fd = ConnectionNumber(xio->dpy);
+    xio->argc = argc;
+    xio->argv = argv;
+    dl_init(xio->windows);
+    xio->screen = DefaultScreen(xio->dpy);
+    xio->depth = DefaultDepth(xio->dpy, xio->screen);
+    xio->width = DisplayWidth(xio->dpy, xio->screen);
+    xio->height = DisplayHeight(xio->dpy, xio->screen);
+    xio->root = DefaultRootWindow(xio->dpy);
+    xio->cmap = DefaultColormap(xio->dpy, xio->screen);
+    xio->xa_del_win = XInternAtom(xio->dpy, "WM_DELETE_WINDOW", False);
+    xio->xa_targets = XInternAtom(xio->dpy, "TARGETS", False);
+    xio->xa_timestamp = XInternAtom(xio->dpy, "TIMESTAMP", False);
+    xio->xa_multiple = XInternAtom(xio->dpy, "MULTIPLE", False);
+    xio->xa_text = XInternAtom(xio->dpy, "TEXT", False);
+
+    if (get_colors(xio) == -1)
+	goto fail3;
+
+    if (get_fonts(xio) == -1)
+	goto fail3;
+
+    if (fdset_add_fd(fds, xio->fd, handle_event, xio) == -1)
+	goto fail3;
+    
+    XAddConnectionWatch(xio->dpy, PTR xlib_conn_watch, PTR fds);
+	
+    xio->icon = XCreateBitmapFromData(xio->dpy, xio->root,
+					icon_bits, icon_width, icon_height);
+
+    xio->group_leader = XCreateSimpleWindow(xio->dpy, xio->root,
+    							0, 0, 1, 1, 0, 0, 0);
+    XSetCommand(xio->dpy, xio->group_leader, xio->argv, xio->argc);
+    classhint->res_name = "VTLeader";
+    classhint->res_class = "AleVT";
+    XSetClassHint(xio->dpy, xio->group_leader, classhint);
+
+    dl_insert_first(dpys, xio->node);
+    return xio;
+
+fail4:
+    fdset_del_fd(fds, xio->fd);
+fail3:
+    XCloseDisplay(xio->dpy);
+fail2:
+    free(xio);
+fail1:
+    return 0;
+}
+
+
+static void set_user_geometry(struct xio_win *xw, char *geom, XSizeHints *sh, int bwidth)
+{
+    static int gravs[] = { NorthWestGravity, NorthEastGravity,
+			   SouthWestGravity, SouthEastGravity };
+    int f, g = 0;
+
+    f = XParseGeometry(geom, &sh->x, &sh->y, &sh->width, &sh->height);
+
+    if (f & WidthValue)
+	sh->width = sh->base_width + sh->width * sh->width_inc;
+    if (f & HeightValue)
+	sh->height = sh->base_height + sh->height * sh->height_inc;
+    if (f & XNegative)
+	g+=1, sh->x = xw->xio->width + sh->x - sh->width - bwidth;
+    if (f & YNegative)
+	g+=2, sh->y = xw->xio->height + sh->y - sh->height - bwidth;
+
+    sh->width = bound(sh->min_width, sh->width, sh->max_width);
+    sh->height = bound(sh->min_height, sh->height, sh->max_height);
+
+    if (f & (WidthValue | HeightValue))
+	sh->flags |= USSize;
+    if (f & (XValue | YValue))
+	sh->flags |= USPosition | PWinGravity;
+
+    sh->win_gravity = gravs[g];
+}
+
+
+struct xio_win * xio_open_win(struct xio *xio, char *geom)
+{
+    struct xio_win *xw;
+    XSetWindowAttributes attr;
+    XGCValues gcval;
+    XSizeHints sizehint[1];
+    XClassHint classhint[1];
+    XWMHints wmhint[1];
+
+    if (not(xw = malloc(sizeof(*xw))))
+	goto fail1;
+
+    xw->xio = xio;
+
+    sizehint->flags = PSize | PBaseSize | PMinSize | PMaxSize | PResizeInc;
+    sizehint->x = sizehint->y = 0;
+    sizehint->width_inc = CW;
+    sizehint->height_inc = CH;
+    sizehint->base_width = 0;
+    sizehint->base_height = 0;
+    sizehint->min_width = 11*CW;
+    sizehint->min_height = 1*CH;
+    sizehint->max_width = sizehint->width = WW + CW;
+    sizehint->max_height = sizehint->height = WH;
+    set_user_geometry(xw, geom, sizehint, 1);
+
+    attr.background_pixel = xio->color[0];
+    attr.event_mask = KeyPressMask |
+    			 ButtonPressMask|ButtonReleaseMask|Button1MotionMask |
+			 ExposureMask;
+    xw->win = XCreateWindow(xio->dpy, xio->root,
+		sizehint->x, sizehint->y, sizehint->width, sizehint->height, 1,
+			CopyFromParent, CopyFromParent, CopyFromParent,
+			CWBackPixel|CWEventMask, &attr);
+
+    classhint->res_name = "VTPage";
+    classhint->res_class = "AleVT";
+
+    wmhint->flags = InputHint | StateHint | WindowGroupHint | IconPixmapHint;
+    wmhint->input = True;
+    wmhint->initial_state = NormalState; //IconicState;
+    wmhint->window_group = xio->group_leader;
+    wmhint->icon_pixmap = xio->icon;
+
+    XSetWMProperties(xio->dpy, xw->win, 0,0, 0,0, sizehint, wmhint, classhint);
+    XSetWMProtocols(xio->dpy, xw->win, &xio->xa_del_win, 1);
+
+    xw->title[0] = 0;
+    xio_title(xw, "AleVT"); // will be reset pretty soon
+
+    gcval.graphics_exposures = False;
+    xw->gc = XCreateGC(xio->dpy, xw->win, GCGraphicsExposures, &gcval);
+
+    xw->tstamp = CurrentTime;
+    xw->fg = xw->bg = -1;	/* unknown colors */
+
+    xw->curs_x = xw->curs_y = 999;	// no cursor
+
+    xw->sel_y1 = NO_SEL;	/* no selection area */
+    xw->sel_start_t = 0;	/* no selection-drag active */
+    xw->sel_set_t = 0;		/* not selection owner */
+    xw->sel_pixmap = 0;		/* no selection pixmap yet */
+
+    xio_clear_win(xw);
+    xw->blink_on = xw->reveal = 0;
+
+    xw->handler = 0;
+
+    XMapWindow(xio->dpy, xw->win);
+    dl_insert_first(xio->windows, xw->node);
+    return xw;
+
+fail2:
+    free(xw);
+fail1:
+    return 0;
+}
+
+
+void xio_close_win(struct xio_win *xw, int dpy_too)
+{
+    struct xio *xio = xw->xio;
+
+    XDestroyWindow(xio->dpy, xw->win);
+    dl_remove(xw->node);
+    free(xw);
+
+    if (dpy_too && dl_empty(xio->windows))
+	xio_close_dpy(xio);
+}
+
+
+void xio_close_dpy(struct xio *xio)
+{
+    while (not dl_empty(xio->windows))
+	xio_close_win((struct xio_win *)xio->windows->first, 0);
+
+    XDestroyWindow(xio->dpy, xio->group_leader);
+    XRemoveConnectionWatch(xio->dpy, PTR xlib_conn_watch, PTR fds);
+    fdset_del_fd(fds, xio->fd);
+    dl_remove(xio->node);
+    free(xio);
+}
+
+
+void xio_set_handler(struct xio_win *xw, void *handler, void *data)
+{
+    xw->handler = handler;
+    xw->data = data;
+}
+
+
+void xio_title(struct xio_win *xw, char *title)
+{
+    char buf[sizeof(xw->title) + 32];
+
+    if (strlen(title) >= sizeof(xw->title))
+	return; //TODO: trimm...
+    if (strcmp(xw->title, title) == 0)
+	return;
+
+    strcpy(xw->title, title);
+    sprintf(buf, "AleVT " VERSION "    %s", xw->title);
+    XStoreName(xw->xio->dpy, xw->win, buf);
+    XSetIconName(xw->xio->dpy, xw->win, xw->title);
+}
+
+
+void xio_clear_win(struct xio_win *xw)
+{
+    memset(xw->ch, ' ', sizeof(xw->ch));
+    xw->dheight = xw->blink = xw->concealed = 0;
+    xw->hidden = xw->lhidden = 0;
+    xw->modified = ALL_LINES;
+}
+
+
+void xio_put_line(struct xio_win *xw, int y, u8 *data)
+{
+    u8 *p = xw->ch + y*W;
+    u8 *ep = p + W;
+    lbits yb = 1 << y;
+    lbits x = xw->dheight;
+
+    if (y < 0 || y >= H)
+	return;
+
+    if (memcmp(data, p, ep - p) == 0)
+	return;
+
+    xw->modified |= yb;
+    xw->blink &= ~yb;
+    xw->dheight &= ~yb;
+    xw->concealed &= ~yb;
+
+    while (p < ep)
+	switch (*p++ = *data++)
+	{
+	    case 0x08:
+		xw->blink |= yb;
+		break;
+	    case 0x0d:
+		if (y < H-1)
+		    xw->dheight |= yb;
+		break;
+	    case 0x18:
+	    	xw->concealed |= yb;
+		break;
+	}
+
+    if ((xw->dheight ^ x) & yb) // dheight has changed, recalc hidden
+    {
+	xw->hidden &= yb*2 - 1;
+	for (; yb & ALL_LINES/2; yb *= 2)
+	    if (~xw->hidden & xw->dheight & yb)
+		xw->hidden |= yb*2;
+    }
+}
+
+
+void xio_put_str(struct xio_win *xw, int y, u8 *str)
+{
+    u8 buf[W];
+    int l;
+    l = strlen(str);
+    if (l < W)
+    {
+	memcpy(buf, str, l);
+	memset(buf + l, ' ', W - l);
+    }
+    else
+	memcpy(buf, str, W);
+    xio_put_line(xw, y, buf);
+}
+
+
+static void dirty(struct xio_win *xw, int y1, int y2) // mark [y1,y2[ dirty
+{
+    if (y1 >= 0 && y1 < H && y1 < y2)
+    {
+	if (y2 > H)
+	    y2 = H;
+	if (xw->hidden & (1 << y1))
+	    y1--;
+	while (y1 < y2)
+	    xw->modified |= 1 << y1++;
+    }
+}
+
+
+int xio_get_line(struct xio_win *xw, int y, u8 *data)
+{
+    if (y < 0 || y >= H)
+	return -1;
+    if (xw->hidden & (1 << y))
+	y--;
+    memcpy(data, xw->ch + y*W, 40);
+    return 0;
+}
+
+
+void xio_set_cursor(struct xio_win *xw, int x, int y)
+{
+    if (xw->curs_y >= 0 && xw->curs_y < H)
+	dirty(xw, xw->curs_y, xw->curs_y + 1);
+    if (x >= 0 && x < W && y >= 0 && y < H)
+	dirty(xw, y, y + 1);
+    else
+	x = y = 999;
+    xw->curs_x = x;
+    xw->curs_y = y;
+}
+
+
+static inline void draw_char(struct xio_win *xw, Window win, int fg, int bg,
+    int c, int dbl, int x, int y, int ry)
+{
+    struct xio *xio = xw->xio;
+
+    if (fg != xw->fg)
+	XSetForeground(xio->dpy, xw->gc, xio->color[xw->fg = fg]);
+    if (bg != xw->bg)
+	XSetBackground(xio->dpy, xw->gc, xio->color[xw->bg = bg]);
+
+    if (dbl)
+    {
+	XCopyPlane(xio->dpy, xio->font[1], win, xw->gc,
+				c%32*CW, c/32*CH*2, CW, CH*2, x*CW, y*CH, 1);
+    }
+    else
+    {
+	XCopyPlane(xio->dpy, xio->font[0], win, xw->gc,
+				    c%32*CW, c/32*CH, CW, CH, x*CW, y*CH, 1);
+	if (xw->dheight & (1<<ry))
+	    XCopyPlane(xio->dpy, xio->font[0], win, xw->gc,
+			    ' '%32*CW, ' '/32*CH, CW, CH, x*CW, y*CH+CH, 1);
+    }
+}
+
+static void draw_cursor(struct xio_win *xw, int x, int y, int dbl)
+{
+    struct xio *xio = xw->xio;
+
+    if (xw->blink_on)
+	XSetForeground(xio->dpy, xw->gc, xio->color[xw->fg = xw->bg ^ 8]);
+    XDrawRectangle(xio->dpy, xw->win, xw->gc, x * CW, y * CH, CW-1,
+    		(dbl ? 2*CH : CH)-1);
+}
+
+
+void xio_update_win(struct xio_win *xw)
+{
+    u8 *p = xw->ch;
+    lbits yb, redraw;
+    int x, y, c;
+
+    if (xw->modified == 0)
+	return;
+
+    redraw = xw->modified; // all modified lines
+    redraw |= xw->lhidden; // all previously hidden lines
+    redraw &= ~xw->hidden;
+
+    xw->lhidden = xw->hidden;
+    xw->modified = 0;
+
+    if (redraw == 0)
+	return;
+
+    for (yb = 1, y = 0; y < H; ++y, yb *= 2)
+	if (redraw & yb)
+	{
+	    int fg = 7, bg = 0, _fg, _bg;
+	    int dbl = 0, blk = 0, con = 0, gfx = 0, sep = 0, hld = 0;
+	    int last_ch = ' ';
+
+	    for (x = 0; x < W; ++x)
+	    {
+		switch (c = *p++)
+		{
+		    case 0x00 ... 0x07: /* alpha + foreground color */
+			fg = c & 7;
+			gfx = 0;
+			con = 0;
+			goto ctrl;
+		    case 0x08: /* flash */
+			blk = not xw->blink_on;
+			goto ctrl;
+		    case 0x09: /* steady */
+			blk = 0;
+			goto ctrl;
+		    case 0x0a: /* end box */
+		    case 0x0b: /* start box */
+			goto ctrl;
+		    case 0x0c: /* normal height */
+			dbl = 0;
+			goto ctrl;
+		    case 0x0d: /* double height */
+			dbl = y < H-1;
+			goto ctrl;
+		    case 0x10 ... 0x17: /* graphics + foreground color */
+			fg = c & 7;
+			gfx = 1;
+			con = 0;
+			goto ctrl;
+		    case 0x18: /* conceal display */
+			con = not xw->reveal;
+			goto ctrl;
+		    case 0x19: /* contiguous graphics */
+			sep = 0;
+			goto ctrl;
+		    case 0x1a: /* separate graphics */
+			sep = 1;
+			goto ctrl;
+		    case 0x1c: /* black background */
+			bg = 0;
+			goto ctrl;
+		    case 0x1d: /* new background */
+			bg = fg;
+			goto ctrl;
+		    case 0x1e: /* hold graphics */
+			hld = 1;
+			goto ctrl;
+		    case 0x1f: /* release graphics */
+			hld = 0;
+			goto ctrl;
+
+		    case 0x0e: /* SO (reserved, double width) */
+		    case 0x0f: /* SI (reserved, double size) */
+		        c= ' '; break;
+		    case 0x1b: /* ESC (reserved) */
+			c = ' ';
+			break;
+
+		    ctrl:
+			c = ' ';
+			if (hld && gfx)
+			    c = last_ch;
+			break;
+
+		    case 0x80 ... 0x9f: /* these aren't used */
+			c = BAD_CHAR;
+			break;
+
+		    default: /* mapped to selected font */
+			break;
+		}
+
+		if (gfx && (c & 0xa0) == 0x20)
+		{
+		    last_ch = c;
+		    c += (c & 0x40) ? 32 : -32;
+		}
+
+		_fg = fg;
+		_bg = bg;
+		if (blk)
+		    _fg |= 8;
+		if (y >= xw->sel_y1 && y < xw->sel_y2 &&
+		    x >= xw->sel_x1 && x < xw->sel_x2)
+		    _bg |= 8;
+		if (con)
+		    _fg = _bg;
+		
+		draw_char(xw, xw->win, _fg, _bg, c, dbl, x, y, y);
+
+		if (y == xw->curs_y && x == xw->curs_x)
+		    draw_cursor(xw, xw->curs_x, xw->curs_y, dbl);
+
+		if (xw->sel_pixmap && (_bg & 8))
+		    draw_char(xw, xw->sel_pixmap, con ? bg : fg, bg, c, dbl,
+					    x - xw->sel_x1, y - xw->sel_y1, y);
+	    }
+	}
+	else
+	    p += 40;
+}
+
+
+static void for_all_windows(void (*func)(struct xio_win *xw), struct xio_win *except)
+{
+    struct xio *xio, *vtn;
+    struct xio_win *xw, *vwn;
+
+    for (xio = PTR dpys->first; vtn = PTR xio->node->next; xio = vtn)
+	for (xw = PTR xio->windows->first; vwn = PTR xw->node->next; xw = vwn)
+	    if (xw != except)
+		func(xw);
+}
+
+
+int xio_set_concealed(struct xio_win *xw, int on)
+{
+    on = !!on;
+    if (xw->reveal == on)
+	return on;
+
+    xw->reveal = on;
+    xw->modified |= xw->concealed;
+    return !on;
+}
+
+
+static void sel_set(struct xio_win *xw, int x1, int y1, int x2, int y2)
+{
+    int t;
+
+    x1 = bound(0, x1, W-1);
+    y1 = bound(0, y1, H-1);
+    x2 = bound(0, x2, W-1);
+    y2 = bound(0, y2, H-1);
+
+    if (x1 > x2)
+	t = x1, x1 = x2, x2 = t;
+    if (y1 > y2)
+	t = y1, y1 = y2, y2 = t;
+
+    dirty(xw, xw->sel_y1, xw->sel_y2);
+
+    if (xw->hidden & (1 << y1))
+	y1--;
+    if (xw->hidden & (2 << y2))
+	y2++;
+
+    xw->sel_x1 = x1;
+    xw->sel_y1 = y1;
+    xw->sel_x2 = x2 + 1;
+    xw->sel_y2 = y2 + 1;
+    dirty(xw, xw->sel_y1, xw->sel_y2);
+}
+
+
+static void sel_abort(struct xio_win *xw)
+{
+    if (xw->sel_set_t)
+	XSetSelectionOwner(xw->xio->dpy, XA_PRIMARY, None, xw->sel_set_t);
+    if (xw->sel_y1 != NO_SEL)
+	dirty(xw, xw->sel_y1, xw->sel_y2);
+    xw->sel_y1 = NO_SEL;
+    xw->sel_set_t = 0;
+    xw->sel_start_t = 0;
+}
+
+
+static void sel_start(struct xio_win *xw, int x, int y, Time t)
+{
+    sel_abort(xw);
+    xw->sel_start_x = x;
+    xw->sel_start_y = y;
+    xw->sel_start_t = t;
+}
+
+
+static void sel_move(struct xio_win *xw, int x, int y, Time t)
+{
+    if (xw->sel_start_t == 0)
+	return;
+    if (xw->sel_y1 == NO_SEL)
+	if (t - xw->sel_start_t < SEL_MIN_TIME)
+	    if (x == xw->sel_start_x)
+		if (y == xw->sel_start_y)
+		    return;
+    sel_set(xw, xw->sel_start_x, xw->sel_start_y, x, y);
+}
+
+
+static int sel_end(struct xio_win *xw, int x, int y, Time t)
+{
+    sel_move(xw, x, y, t);
+    xw->sel_start_t = 0;
+
+    if (xw->sel_y1 == NO_SEL)
+	return 0;
+
+    for_all_windows(sel_abort, xw);
+    XSetSelectionOwner(xw->xio->dpy, XA_PRIMARY, xw->win, t);
+    if (XGetSelectionOwner(xw->xio->dpy, XA_PRIMARY) == xw->win)
+	xw->sel_set_t = t;
+    else
+	sel_abort(xw);
+    return 1;
+}
+
+
+static int sel_convert2ascii(struct xio_win *xw, u8 *buf)
+{
+    u8 *d = buf;
+    int x, y, nl = 0;
+
+    for (y = xw->sel_y1; y < xw->sel_y2; y++)
+    {
+	u8 *s = xw->ch + y * W;
+	int gfx = 0, con = 0;
+
+	if (~xw->hidden & (1 << y))
+	{
+	    for (x = 0; x < xw->sel_x2; ++x)
+	    {
+		int ch, c = ' ';
+		switch (ch = *s++)
+		{
+		    case 0x00 ... 0x07:
+			gfx = con = 0;
+			break;
+		    case 0x10 ... 0x17:
+			gfx = 1, con = 0;
+			break;
+		    case 0x18:
+			con = not xw->reveal;
+			break;
+		    case 0xa0 ... 0xff:
+		    case 0x20 ... 0x7f:
+			if (not con)
+			    if (gfx && ch != ' ' && (ch & 0xa0) == 0x20)
+				c = '#';
+			    else if (ch == 0x7f)
+				c = '*';
+			    else
+				c = ch;
+			break;
+		}
+		if (x >= xw->sel_x1)
+		{
+		    if (nl)
+			*d++ = '\n', nl = 0;
+		    *d++ = c;
+		}
+	    }
+	    nl = 1;
+	}
+    }
+    *d = 0; // not necessary
+    return d - buf;
+}
+
+
+static Pixmap sel_convert2pixmap(struct xio_win *xw)
+{
+    struct xio *xio = xw->xio;
+    Pixmap pm;
+
+    if (xw->sel_y1 == NO_SEL)
+    return None;
+
+    pm = XCreatePixmap(xio->dpy, xio->root, (xw->sel_x2 - xw->sel_x1) * CW,
+					    (xw->sel_y2 - xw->sel_y1) * CH,
+								 xio->depth);
+    xw->sel_pixmap = pm;
+    dirty(xw, xw->sel_y1, xw->sel_y2);
+    xio_update_win(xw);
+    xw->sel_pixmap = 0;
+
+    return pm;
+}
+
+
+static int sel_do_conv(struct xio_win *xw, Window w, Atom type, Atom prop)
+{
+    struct xio *xio = xw->xio;
+
+    if (type == xio->xa_targets)
+    {
+	u32 atoms[6];
+
+	atoms[0] = XA_STRING;
+	atoms[1] = xio->xa_text;
+	atoms[2] = XA_PIXMAP;
+	atoms[3] = XA_COLORMAP;
+	atoms[4] = xio->xa_multiple;
+	atoms[5] = xio->xa_timestamp;
+	XChangeProperty(xio->dpy, w, prop, type,
+				32, PropModeReplace, PTR atoms, NELEM(atoms));
+    }
+    else if (type == xio->xa_timestamp)
+    {
+	u32 t = xw->sel_set_t;
+
+	XChangeProperty(xio->dpy, w, prop, type, 32, PropModeReplace, PTR &t, 1);
+    }
+    else if (type == XA_COLORMAP)
+    {
+	u32 t = xio->cmap;
+
+	XChangeProperty(xio->dpy, w, prop, type, 32, PropModeReplace, PTR &t, 1);
+    }
+    else if (type == XA_STRING || type == xio->xa_text)
+    {
+	u8 buf[H * (W+1)];
+	int len;
+
+	len = sel_convert2ascii(xw, buf);
+
+	XChangeProperty(xio->dpy, w, prop, type, 8, PropModeReplace, buf, len);
+    }
+    else if (type == XA_PIXMAP || type == XA_DRAWABLE)
+    {
+	Pixmap pm;
+
+	pm = sel_convert2pixmap(xw);
+
+	XChangeProperty(xio->dpy, w, prop, type, 32, PropModeReplace, PTR &pm, 1);
+    }
+    else if (type == xio->xa_multiple)
+    {
+	u32 *atoms, ty, fo, i;
+	unsigned long n, b;
+
+	if (prop != None)
+	{
+	    if (Success == XGetWindowProperty(xio->dpy, w, prop, 0, 1024, 0,
+			AnyPropertyType, PTR &ty, PTR &fo, &n, &b, PTR &atoms))
+	    {
+		if (fo == 32 && n%2 == 0)
+		{
+		    for (i = 0; i < n; i += 2)
+			if (sel_do_conv(xw, w, atoms[i], atoms[i+1]) == None)
+			    atoms[i] = None;
+		}
+		XChangeProperty(xio->dpy, w, prop, type, 32, PropModeReplace,
+								 PTR atoms, n);
+		XFree(atoms);
+	    }
+	}
+    }
+    else
+	return None;
+    return prop;
+}
+
+
+static void sel_send(struct xio_win *xw, XSelectionRequestEvent *req)
+{
+    XSelectionEvent ev[1];
+
+    if (req->property == None)
+	req->property = req->target;
+
+    ev->type = SelectionNotify;
+    ev->requestor = req->requestor;
+    ev->selection = req->selection;
+    ev->target = req->target;
+    ev->property = sel_do_conv(xw, req->requestor, req->target, req->property);
+    ev->time = req->time;
+    XSendEvent(xw->xio->dpy, req->requestor, False, 0, PTR ev);
+}
+
+
+static void sel_retrieve(struct xio_win *xw, Window w, Atom prop, int del)
+{
+    u8 *data;
+    u32 ty, fo;
+    unsigned long n, b;
+    struct xio *xio = xw->xio;
+
+    if (prop == None)
+	return;
+
+    if (Success == XGetWindowProperty(xio->dpy, w, prop, 0, 1024, del,
+			AnyPropertyType, PTR &ty, PTR &fo, &n, &b, PTR &data))
+    {
+	if (fo == 8 && n != 0)
+	{
+	    struct vt_event vtev[1];
+
+	    vtev->resource = xw;
+	    vtev->type = EV_SELECTION;
+	    vtev->i1 = n;
+	    vtev->p1 = data;
+	    xw->handler(xw->data, vtev);
+	}
+	XFree(data);
+    }
+}
+
+
+void xio_cancel_selection(struct xio_win *xw)
+{
+    sel_abort(xw);
+}
+
+
+void xio_query_selection(struct xio_win *xw)
+{
+    struct xio *xio = xw->xio;
+
+    if (XGetSelectionOwner(xio->dpy, XA_PRIMARY) == None)
+	sel_retrieve(xw, xio->root, XA_CUT_BUFFER0, False);
+    else
+    {
+	XDeleteProperty(xio->dpy, xw->win, XA_STRING);
+	XConvertSelection(xio->dpy, XA_PRIMARY, XA_STRING,
+					    XA_STRING, xw->win, xw->tstamp);
+    }
+}
+
+
+void xio_set_selection(struct xio_win *xw, int x1, int y1, int x2, int y2)
+{
+    sel_start(xw, x1, y1, xw->tstamp - SEL_MIN_TIME);
+    sel_end(xw, x2, y2, xw->tstamp);
+}
+
+
+static void handle_event(struct xio *xio, int fd)
+{
+    struct xio_win *xw;
+    struct vt_event vtev[1];
+    XEvent ev[1];
+
+    XNextEvent(xio->dpy, ev);
+
+    for (xw = PTR xio->windows->first; xw->node->next; xw = PTR xw->node->next)
+	if (xw->win == ev->xany.window)
+	    break;
+    if (xw->node->next == 0)
+	return;
+
+    vtev->resource = xw;
+
+    switch(ev->type)
+    {
+	case Expose:
+	{
+	    int y1 = ev->xexpose.y / CH;
+	    int y2 = (ev->xexpose.y + ev->xexpose.height + CH-1) / CH;
+
+	    dirty(xw, y1, y2);
+	    break;
+	}
+	case ClientMessage:
+	{
+	    vtev->type = EV_CLOSE;
+	    if (ev->xclient.format == 32)
+		if ((Atom)ev->xclient.data.l[0] == xio->xa_del_win)
+		    xw->handler(xw->data, vtev);
+	    break;
+	}
+	case KeyPress:
+	{
+	    unsigned char ch;
+	    KeySym k;
+
+	    xw->tstamp = ev->xkey.time;
+	    vtev->type = EV_KEY;
+	    vtev->i1 = 0;
+	    vtev->i2 = (ev->xkey.state & ShiftMask) != 0;
+	    if (XLookupString(&ev->xkey, &ch, 1, &k, 0))
+		vtev->i1 = ch;
+	    else
+		switch (k)
+		{
+		    case XK_Left:	vtev->i1 = KEY_LEFT;	break;
+		    case XK_Right:	vtev->i1 = KEY_RIGHT;	break;
+		    case XK_Up:		vtev->i1 = KEY_UP;	break;
+		    case XK_Down:	vtev->i1 = KEY_DOWN;	break;
+		    case XK_Prior:	vtev->i1 = KEY_PUP;	break;
+		    case XK_Next:	vtev->i1 = KEY_PDOWN;	break;
+		    case XK_Delete:	vtev->i1 = KEY_DEL;	break;
+		    case XK_Insert:	vtev->i1 = KEY_INS;	break;
+		    case XK_F1:		vtev->i1 = KEY_F(1);	break;
+		    case XK_F2:		vtev->i1 = KEY_F(2);	break;
+		    case XK_F3:		vtev->i1 = KEY_F(3);	break;
+		    case XK_F4:		vtev->i1 = KEY_F(4);	break;
+		    case XK_F5:		vtev->i1 = KEY_F(5);	break;
+		    case XK_F6:		vtev->i1 = KEY_F(6);	break;
+		    case XK_F7:		vtev->i1 = KEY_F(7);	break;
+		    case XK_F8:		vtev->i1 = KEY_F(8);	break;
+		    case XK_F9:		vtev->i1 = KEY_F(9);	break;
+		    case XK_F10:	vtev->i1 = KEY_F(10);	break;
+		    case XK_F11:	vtev->i1 = KEY_F(11);	break;
+		    case XK_F12:	vtev->i1 = KEY_F(12);	break;
+		}
+	    if (vtev->i1)
+		xw->handler(xw->data, vtev);
+	    break;
+	}
+	case ButtonPress:
+	{
+	    xw->tstamp = ev->xkey.time;
+	    ev->xbutton.x /= CW;
+	    ev->xbutton.y /= CH;
+	    if (ev->xbutton.button == Button1)
+		sel_start(xw, ev->xbutton.x, ev->xbutton.y, ev->xbutton.time);
+	    break;
+	}
+	case MotionNotify:
+	{
+	    xw->tstamp = ev->xkey.time;
+	    ev->xmotion.x /= CW;
+	    ev->xmotion.y /= CH;
+	    if (ev->xmotion.state & Button1Mask)
+		sel_move(xw, ev->xmotion.x, ev->xmotion.y, ev->xmotion.time);
+	    break;
+	}
+	case ButtonRelease:
+	{
+	    xw->tstamp = ev->xkey.time;
+	    ev->xbutton.x /= CW;
+	    ev->xbutton.y /= CH;
+	    if (ev->xbutton.button == Button1)
+		if (sel_end(xw, ev->xbutton.x, ev->xbutton.y, ev->xbutton.time))
+		    break;
+
+	    vtev->type = EV_MOUSE;
+	    vtev->i1 = ev->xbutton.button;
+	    vtev->i2 = (ev->xbutton.state & ShiftMask) != 0;
+	    vtev->i3 = ev->xbutton.x;
+	    vtev->i4 = ev->xbutton.y;
+	    if (vtev->i3 >= 0 && vtev->i3 < W && vtev->i4 >= 0 && vtev->i4 < H)
+		xw->handler(xw->data, vtev);
+	    break;
+	}
+	case SelectionClear:
+	{
+	// may be our own Owner=None due to sel_start
+	    if (xw->sel_set_t && ev->xselectionclear.time >= xw->sel_set_t)
+	    {
+		xw->sel_set_t = 0; // no need to reset owner
+		sel_abort(xw);
+	    }
+	    break;
+	}
+	case SelectionRequest:
+	{
+	    sel_send(xw, &ev->xselectionrequest);
+	    break;
+	}
+	case SelectionNotify:
+	{
+	    sel_retrieve(xw, ev->xselection.requestor, ev->xselection.property, True);
+	    break;
+	}
+	default:
+		break;
+    }
+}
+
+
+static void switch_blink_state(struct xio_win *xw)
+{
+    xw->blink_on = !xw->blink_on;
+    xw->modified |= xw->blink;
+    dirty(xw, xw->curs_y, xw->curs_y + 1);
+}
+
+
+static void send_timer_event(struct xio_win *xw)
+{
+    struct vt_event vtev[1];
+    vtev->type = EV_TIMER;
+    xw->handler(xw->data, vtev);
+}
+
+
+static void xio_timer(void *data, int fd)
+{
+    char buf[64];
+    read(fd, buf, sizeof(buf));
+    for_all_windows(switch_blink_state, 0);
+    for_all_windows(send_timer_event, 0);
+}
+
+
+void xio_event_loop(void)
+{
+    struct xio *xio, *vtn;
+    int f;
+
+    while (not dl_empty(dpys))
+    {
+	do
+	{
+	    for_all_windows(xio_update_win, 0);
+	    f = 0;
+	    for (xio = PTR dpys->first; vtn = PTR xio->node->next; xio = vtn)
+		while (XPending(xio->dpy))
+		{
+		    handle_event(xio, xio->fd);
+		    f++;
+		}
+	} while (f);
+	fdset_select(fds, -1);
+    }
+}