ref: a43c1e6fab4d75c8d173a482ee8f4aa04de151c0
dir: /gui-x11/screen.c/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include "keysym2ucs.h"
/*
* alias defs for image types to overcome name conflicts
*/
#define Point IPoint
#define Rectangle IRectangle
#define Display IDisplay
#define Font IFont
#define Screen IScreen
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <memdraw.h>
#include <keyboard.h>
#include "dat.h"
#include "fns.h"
#include "screen.h"
#undef time
#undef Point
#undef Rectangle
#undef Display
#undef Font
#undef Screen
typedef struct ICursor ICursor;
struct ICursor
{
int w;
int h;
int hotx;
int hoty;
char *src;
char *mask;
};
#define ABS(x) ((x) < 0 ? -(x) : (x))
enum
{
DblTime = 300 /* double click time in msec */
};
XColor map[256]; /* Plan 9 colormap array */
XColor map7[128]; /* Plan 9 colormap array */
uchar map7to8[128][2];
Colormap xcmap; /* Default shared colormap */
int plan9tox11[256]; /* Values for mapping between */
int x11toplan9[256]; /* X11 and Plan 9 */
int x24bitswap = 0; /* swap endian for 24bit RGB */
int xtblbit;
extern int mousequeue;
/* for copy/paste, lifted from plan9ports */
Atom clipboard;
Atom utf8string;
Atom targets;
Atom text;
Atom compoundtext;
static XModifierKeymap *modmap;
static int keypermod;
static Drawable xdrawable;
/* static Atom wm_take_focus; */
static void xexpose(XEvent*);
static void xmouse(XEvent*);
static void xkeyboard(XEvent*);
static void xmapping(XEvent*);
static void xdestroy(XEvent*);
static void xselect(XEvent*);
static void xproc(void*);
static Memimage* xinitscreen(void);
static void initmap(Window);
static GC creategc(Drawable);
static void graphicscmap(XColor*);
int xscreendepth;
Drawable xscreenid;
Display* xdisplay;
Display* xkmcon;
Display* xsnarfcon;
Visual *xvis;
GC xgcfill, xgccopy, xgcsimplesrc, xgczero, xgcreplsrc;
GC xgcfill0, xgccopy0, xgcsimplesrc0, xgczero0, xgcreplsrc0;
ulong xblack;
ulong xwhite;
ulong xscreenchan;
extern Memimage* xallocmemimage(IRectangle, ulong, int);
Memimage *gscreen;
Screeninfo screen;
XImage *ximage;
void
screeninit(void)
{
_memmkcmap();
gscreen = xinitscreen();
kproc("xscreen", xproc, nil);
memimageinit();
terminit();
flushmemscreen(gscreen->r);
}
uchar*
attachscreen(IRectangle *r, ulong *chan, int *depth,
int *width, int *softscreen, void **X)
{
*r = gscreen->r;
*chan = gscreen->chan;
*depth = gscreen->depth;
*width = gscreen->width;
*X = gscreen->X;
*softscreen = 1;
return gscreen->data->bdata;
}
void
flushmemscreen(IRectangle r)
{
if(r.min.x >= r.max.x || r.min.y >= r.max.y)
return;
XCopyArea(xdisplay, xscreenid, xdrawable, xgccopy, r.min.x, r.min.y, Dx(r), Dy(r), r.min.x, r.min.y);
XFlush(xdisplay);
}
static int
revbyte(int b)
{
int r;
r = 0;
r |= (b&0x01) << 7;
r |= (b&0x02) << 5;
r |= (b&0x04) << 3;
r |= (b&0x08) << 1;
r |= (b&0x10) >> 1;
r |= (b&0x20) >> 3;
r |= (b&0x40) >> 5;
r |= (b&0x80) >> 7;
return r;
}
void
mouseset(IPoint xy)
{
XWarpPointer(xdisplay, None, xdrawable, 0, 0, 0, 0, xy.x, xy.y);
XFlush(xdisplay);
}
static Cursor xcursor;
void
setcursor(void)
{
Cursor xc;
XColor fg, bg;
Pixmap xsrc, xmask;
int i;
uchar src[2*16], mask[2*16];
for(i=0; i<2*16; i++){
src[i] = revbyte(cursor.set[i]);
mask[i] = revbyte(cursor.set[i] | cursor.clr[i]);
}
fg = map[0];
bg = map[255];
xsrc = XCreateBitmapFromData(xdisplay, xdrawable, src, 16, 16);
xmask = XCreateBitmapFromData(xdisplay, xdrawable, mask, 16, 16);
xc = XCreatePixmapCursor(xdisplay, xsrc, xmask, &fg, &bg, -cursor.offset.x, -cursor.offset.y);
if(xc != 0) {
XDefineCursor(xdisplay, xdrawable, xc);
if(xcursor != 0)
XFreeCursor(xdisplay, xcursor);
xcursor = xc;
}
XFreePixmap(xdisplay, xsrc);
XFreePixmap(xdisplay, xmask);
XFlush(xdisplay);
}
void
cursorarrow(void)
{
if(xcursor != 0){
XFreeCursor(xdisplay, xcursor);
xcursor = 0;
}
XUndefineCursor(xdisplay, xdrawable);
XFlush(xdisplay);
}
static void
xproc(void *arg)
{
ulong mask;
XEvent event;
mask = KeyPressMask|
ButtonPressMask|
ButtonReleaseMask|
PointerMotionMask|
Button1MotionMask|
Button2MotionMask|
Button3MotionMask|
Button4MotionMask|
Button5MotionMask|
ExposureMask|
StructureNotifyMask;
XSelectInput(xkmcon, xdrawable, mask);
for(;;) {
//XWindowEvent(xkmcon, xdrawable, mask, &event);
XNextEvent(xkmcon, &event);
xselect(&event);
xkeyboard(&event);
xmouse(&event);
xexpose(&event);
xmapping(&event);
xdestroy(&event);
}
}
static int
shutup(Display *d, XErrorEvent *e)
{
char buf[200];
iprint("X error: error code=%d, request_code=%d, minor=%d\n", e->error_code, e->request_code, e->minor_code);
XGetErrorText(d, e->error_code, buf, sizeof(buf));
iprint("%s\n", buf);
USED(d);
USED(e);
return 0;
}
static int
panicshutup(Display *d)
{
panic("x error");
return -1;
}
static Memimage*
xinitscreen(void)
{
Memimage *gscreen;
int i, xsize, ysize, pmid;
char *argv[2];
char *disp_val;
Window rootwin;
IRectangle r;
XWMHints hints;
Screen *screen;
XVisualInfo xvi;
int rootscreennum;
XTextProperty name;
XClassHint classhints;
XSizeHints normalhints;
XSetWindowAttributes attrs;
XPixmapFormatValues *pfmt;
int n;
Memdata *md;
xscreenid = 0;
xdrawable = 0;
xdisplay = XOpenDisplay(NULL);
if(xdisplay == 0){
disp_val = getenv("DISPLAY");
if(disp_val == 0)
disp_val = "not set";
iprint("drawterm: open %r, DISPLAY is %s\n", disp_val);
exit(0);
}
XSetErrorHandler(shutup);
XSetIOErrorHandler(panicshutup);
rootscreennum = DefaultScreen(xdisplay);
rootwin = DefaultRootWindow(xdisplay);
xscreendepth = DefaultDepth(xdisplay, rootscreennum);
if(XMatchVisualInfo(xdisplay, rootscreennum, 16, TrueColor, &xvi)
|| XMatchVisualInfo(xdisplay, rootscreennum, 16, DirectColor, &xvi)){
xvis = xvi.visual;
xscreendepth = 16;
xtblbit = 1;
}
else if(XMatchVisualInfo(xdisplay, rootscreennum, 24, TrueColor, &xvi)
|| XMatchVisualInfo(xdisplay, rootscreennum, 24, DirectColor, &xvi)){
xvis = xvi.visual;
xscreendepth = 24;
xtblbit = 1;
}
else if(XMatchVisualInfo(xdisplay, rootscreennum, 8, PseudoColor, &xvi)
|| XMatchVisualInfo(xdisplay, rootscreennum, 8, StaticColor, &xvi)){
if(xscreendepth > 8)
panic("drawterm: can't deal with colormapped depth %d screens\n", xscreendepth);
xvis = xvi.visual;
xscreendepth = 8;
}
else{
if(xscreendepth != 8)
panic("drawterm: can't deal with depth %d screens\n", xscreendepth);
xvis = DefaultVisual(xdisplay, rootscreennum);
}
/*
* xscreendepth is only the number of significant pixel bits,
* not the total. We need to walk the display list to find
* how many actual bits are being used per pixel.
*/
xscreenchan = 0; /* not a valid channel */
pfmt = XListPixmapFormats(xdisplay, &n);
for(i=0; i<n; i++){
if(pfmt[i].depth == xscreendepth){
switch(pfmt[i].bits_per_pixel){
case 1: /* untested */
xscreenchan = GREY1;
break;
case 2: /* untested */
xscreenchan = GREY2;
break;
case 4: /* untested */
xscreenchan = GREY4;
break;
case 8:
xscreenchan = CMAP8;
break;
case 16: /* uses 16 rather than 15, empirically. */
xscreenchan = RGB16;
break;
case 24: /* untested (impossible?) */
xscreenchan = RGB24;
break;
case 32:
xscreenchan = CHAN4(CIgnore, 8, CRed, 8, CGreen, 8, CBlue, 8);
break;
}
}
}
if(xscreenchan == 0)
panic("drawterm: unknown screen pixel format\n");
screen = DefaultScreenOfDisplay(xdisplay);
xcmap = DefaultColormapOfScreen(screen);
if(xvis->class != StaticColor){
graphicscmap(map);
initmap(rootwin);
}
if((modmap = XGetModifierMapping(xdisplay)))
keypermod = modmap->max_keypermod;
r.min = ZP;
r.max.x = WidthOfScreen(screen);
r.max.y = HeightOfScreen(screen);
md = mallocz(sizeof(Memdata), 1);
xsize = Dx(r)*3/4;
ysize = Dy(r)*3/4;
attrs.colormap = xcmap;
attrs.background_pixel = 0;
attrs.border_pixel = 0;
/* attrs.override_redirect = 1;*/ /* WM leave me alone! |CWOverrideRedirect */
xdrawable = XCreateWindow(xdisplay, rootwin, 0, 0, xsize, ysize, 0,
xscreendepth, InputOutput, xvis, CWBackPixel|CWBorderPixel|CWColormap, &attrs);
/*
* set up property as required by ICCCM
*/
name.value = (uchar*)"drawterm";
name.encoding = XA_STRING;
name.format = 8;
name.nitems = strlen(name.value);
normalhints.flags = USSize|PMaxSize;
normalhints.max_width = Dx(r);
normalhints.max_height = Dy(r);
normalhints.width = xsize;
normalhints.height = ysize;
hints.flags = InputHint|StateHint;
hints.input = 1;
hints.initial_state = NormalState;
classhints.res_name = "drawterm";
classhints.res_class = "Drawterm";
argv[0] = "drawterm";
argv[1] = nil;
XSetWMProperties(xdisplay, xdrawable,
&name, /* XA_WM_NAME property for ICCCM */
&name, /* XA_WM_ICON_NAME */
argv, /* XA_WM_COMMAND */
1, /* argc */
&normalhints, /* XA_WM_NORMAL_HINTS */
&hints, /* XA_WM_HINTS */
&classhints); /* XA_WM_CLASS */
XFlush(xdisplay);
/*
* put the window on the screen
*/
XMapWindow(xdisplay, xdrawable);
XFlush(xdisplay);
xscreenid = XCreatePixmap(xdisplay, xdrawable, Dx(r), Dy(r), xscreendepth);
gscreen = xallocmemimage(r, xscreenchan, xscreenid);
xgcfill = creategc(xscreenid);
XSetFillStyle(xdisplay, xgcfill, FillSolid);
xgccopy = creategc(xscreenid);
xgcsimplesrc = creategc(xscreenid);
XSetFillStyle(xdisplay, xgcsimplesrc, FillStippled);
xgczero = creategc(xscreenid);
xgcreplsrc = creategc(xscreenid);
XSetFillStyle(xdisplay, xgcreplsrc, FillTiled);
pmid = XCreatePixmap(xdisplay, xdrawable, 1, 1, 1);
xgcfill0 = creategc(pmid);
XSetForeground(xdisplay, xgcfill0, 0);
XSetFillStyle(xdisplay, xgcfill0, FillSolid);
xgccopy0 = creategc(pmid);
xgcsimplesrc0 = creategc(pmid);
XSetFillStyle(xdisplay, xgcsimplesrc0, FillStippled);
xgczero0 = creategc(pmid);
xgcreplsrc0 = creategc(pmid);
XSetFillStyle(xdisplay, xgcreplsrc0, FillTiled);
XFreePixmap(xdisplay, pmid);
XSetForeground(xdisplay, xgccopy, plan9tox11[0]);
XFillRectangle(xdisplay, xscreenid, xgccopy, 0, 0, xsize, ysize);
xkmcon = XOpenDisplay(NULL);
if(xkmcon == 0){
disp_val = getenv("DISPLAY");
if(disp_val == 0)
disp_val = "not set";
iprint("drawterm: open %r, DISPLAY is %s\n", disp_val);
exit(0);
}
xsnarfcon = XOpenDisplay(NULL);
if(xsnarfcon == 0){
disp_val = getenv("DISPLAY");
if(disp_val == 0)
disp_val = "not set";
iprint("drawterm: open %r, DISPLAY is %s\n", disp_val);
exit(0);
}
clipboard = XInternAtom(xkmcon, "CLIPBOARD", False);
utf8string = XInternAtom(xkmcon, "UTF8_STRING", False);
targets = XInternAtom(xkmcon, "TARGETS", False);
text = XInternAtom(xkmcon, "TEXT", False);
compoundtext = XInternAtom(xkmcon, "COMPOUND_TEXT", False);
xblack = screen->black_pixel;
xwhite = screen->white_pixel;
return gscreen;
}
static void
graphicscmap(XColor *map)
{
int r, g, b, cr, cg, cb, v, num, den, idx, v7, idx7;
for(r=0; r!=4; r++) {
for(g = 0; g != 4; g++) {
for(b = 0; b!=4; b++) {
for(v = 0; v!=4; v++) {
den=r;
if(g > den)
den=g;
if(b > den)
den=b;
/* divide check -- pick grey shades */
if(den==0)
cr=cg=cb=v*17;
else {
num=17*(4*den+v);
cr=r*num/den;
cg=g*num/den;
cb=b*num/den;
}
idx = r*64 + v*16 + ((g*4 + b + v - r) & 15);
map[idx].red = cr*0x0101;
map[idx].green = cg*0x0101;
map[idx].blue = cb*0x0101;
map[idx].pixel = idx;
map[idx].flags = DoRed|DoGreen|DoBlue;
v7 = v >> 1;
idx7 = r*32 + v7*16 + g*4 + b;
if((v & 1) == v7){
map7to8[idx7][0] = idx;
if(den == 0) { /* divide check -- pick grey shades */
cr = ((255.0/7.0)*v7)+0.5;
cg = cr;
cb = cr;
}
else {
num=17*15*(4*den+v7*2)/14;
cr=r*num/den;
cg=g*num/den;
cb=b*num/den;
}
map7[idx7].red = cr*0x0101;
map7[idx7].green = cg*0x0101;
map7[idx7].blue = cb*0x0101;
map7[idx7].pixel = idx7;
map7[idx7].flags = DoRed|DoGreen|DoBlue;
}
else
map7to8[idx7][1] = idx;
}
}
}
}
}
/*
* Initialize and install the drawterm colormap as a private colormap for this
* application. Drawterm gets the best colors here when it has the cursor focus.
*/
static void
initmap(Window w)
{
XColor c;
int i;
ulong p, pp;
char buf[30];
if(xscreendepth <= 1)
return;
if(xscreendepth >= 24) {
/* The pixel value returned from XGetPixel needs to
* be converted to RGB so we can call rgb2cmap()
* to translate between 24 bit X and our color. Unfortunately,
* the return value appears to be display server endian
* dependant. Therefore, we run some heuristics to later
* determine how to mask the int value correctly.
* Yeah, I know we can look at xvis->byte_order but
* some displays say MSB even though they run on LSB.
* Besides, this is more anal.
*/
c = map[19];
/* find out index into colormap for our RGB */
if(!XAllocColor(xdisplay, xcmap, &c))
panic("drawterm: screen-x11 can't alloc color");
p = c.pixel;
pp = rgb2cmap((p>>16)&0xff,(p>>8)&0xff,p&0xff);
if(pp!=map[19].pixel) {
/* check if endian is other way */
pp = rgb2cmap(p&0xff,(p>>8)&0xff,(p>>16)&0xff);
if(pp!=map[19].pixel)
panic("cannot detect x server byte order");
switch(xscreenchan){
case RGB24:
xscreenchan = BGR24;
break;
case XRGB32:
xscreenchan = XBGR32;
break;
default:
panic("don't know how to byteswap channel %s",
chantostr(buf, xscreenchan));
break;
}
}
} else if(xvis->class == TrueColor || xvis->class == DirectColor) {
} else if(xvis->class == PseudoColor) {
if(xtblbit == 0){
xcmap = XCreateColormap(xdisplay, w, xvis, AllocAll);
XStoreColors(xdisplay, xcmap, map, 256);
for(i = 0; i < 256; i++) {
plan9tox11[i] = i;
x11toplan9[i] = i;
}
}
else {
for(i = 0; i < 128; i++) {
c = map7[i];
if(!XAllocColor(xdisplay, xcmap, &c)) {
iprint("drawterm: can't alloc colors in default map, don't use -7\n");
exit(0);
}
plan9tox11[map7to8[i][0]] = c.pixel;
plan9tox11[map7to8[i][1]] = c.pixel;
x11toplan9[c.pixel] = map7to8[i][0];
}
}
}
else
panic("drawterm: unsupported visual class %d\n", xvis->class);
}
static void
xdestroy(XEvent *e)
{
XDestroyWindowEvent *xe;
if(e->type != DestroyNotify)
return;
xe = (XDestroyWindowEvent*)e;
if(xe->window == xdrawable)
exit(0);
}
static void
xselection(XEvent *e)
{
XSelectionRequestEvent *xre;
XSelectionEvent *xe;
}
static void
xmapping(XEvent *e)
{
XMappingEvent *xe;
if(e->type != MappingNotify)
return;
xe = (XMappingEvent*)e;
if(modmap)
XFreeModifiermap(modmap);
modmap = XGetModifierMapping(xe->display);
if(modmap)
keypermod = modmap->max_keypermod;
}
/*
* Disable generation of GraphicsExpose/NoExpose events in the GC.
*/
static GC
creategc(Drawable d)
{
XGCValues gcv;
gcv.function = GXcopy;
gcv.graphics_exposures = False;
return XCreateGC(xdisplay, d, GCFunction|GCGraphicsExposures, &gcv);
}
static void
xexpose(XEvent *e)
{
IRectangle r;
XExposeEvent *xe;
if(e->type != Expose)
return;
xe = (XExposeEvent*)e;
r.min.x = xe->x;
r.min.y = xe->y;
r.max.x = xe->x + xe->width;
r.max.y = xe->y + xe->height;
drawflushr(r);
}
static void
xkeyboard(XEvent *e)
{
KeySym k;
unsigned int md;
/*
* I tried using XtGetActionKeysym, but it didn't seem to
* do case conversion properly
* (at least, with Xterminal servers and R4 intrinsics)
*/
if(e->xany.type != KeyPress)
return;
XLookupString(e,NULL,0,&k,NULL);
if(k == XK_Multi_key || k == NoSymbol)
return;
if(k&0xFF00){
switch(k){
case XK_BackSpace:
case XK_Tab:
case XK_Escape:
case XK_Delete:
case XK_KP_0:
case XK_KP_1:
case XK_KP_2:
case XK_KP_3:
case XK_KP_4:
case XK_KP_5:
case XK_KP_6:
case XK_KP_7:
case XK_KP_8:
case XK_KP_9:
case XK_KP_Divide:
case XK_KP_Multiply:
case XK_KP_Subtract:
case XK_KP_Add:
case XK_KP_Decimal:
k &= 0x7F;
break;
case XK_Linefeed:
k = '\r';
break;
case XK_KP_Space:
k = ' ';
break;
case XK_Home:
case XK_KP_Home:
k = Khome;
break;
case XK_Left:
case XK_KP_Left:
k = Kleft;
break;
case XK_Up:
case XK_KP_Up:
k = Kup;
break;
case XK_Down:
case XK_KP_Down:
k = Kdown;
break;
case XK_Right:
case XK_KP_Right:
k = Kright;
break;
case XK_Page_Down:
case XK_KP_Page_Down:
k = Kpgdown;
break;
case XK_End:
case XK_KP_End:
k = Kend;
break;
case XK_Page_Up:
case XK_KP_Page_Up:
k = Kpgup;
break;
case XK_Insert:
case XK_KP_Insert:
k = Kins;
break;
case XK_KP_Enter:
case XK_Return:
k = '\n';
break;
case XK_Alt_L:
case XK_Alt_R:
k = Kalt;
break;
case XK_Shift_L:
case XK_Shift_R:
case XK_Control_L:
case XK_Control_R:
case XK_Caps_Lock:
case XK_Shift_Lock:
case XK_Meta_L:
case XK_Meta_R:
case XK_Super_L:
case XK_Super_R:
case XK_Hyper_L:
case XK_Hyper_R:
return;
default: /* not ISO-1 or tty control */
if(k>0xff) {
k = keysym2ucs(k); /* supplied by X */
if(k == -1) return;
}
}
}
/* Compensate for servers that call a minus a hyphen */
if(k == XK_hyphen)
k = XK_minus;
/* Do control mapping ourselves if translator doesn't */
if(e->xkey.state&ControlMask)
k &= 0x9f;
if(k == NoSymbol) {
return;
}
kbdputc(kbdq, k);
}
static void
xmouse(XEvent *e)
{
Mousestate ms;
int i, s;
XButtonEvent *be;
XMotionEvent *me;
switch(e->type){
case ButtonPress:
be = (XButtonEvent *)e;
ms.xy.x = be->x;
ms.xy.y = be->y;
s = be->state;
ms.msec = be->time;
switch(be->button){
case 1:
s |= Button1Mask;
break;
case 2:
s |= Button2Mask;
break;
case 3:
s |= Button3Mask;
break;
case 4:
s |= Button4Mask;
break;
case 5:
s |= Button5Mask;
break;
}
break;
case ButtonRelease:
be = (XButtonEvent *)e;
ms.xy.x = be->x;
ms.xy.y = be->y;
ms.msec = be->time;
s = be->state;
switch(be->button){
case 1:
s &= ~Button1Mask;
break;
case 2:
s &= ~Button2Mask;
break;
case 3:
s &= ~Button3Mask;
break;
case 4:
s &= ~Button4Mask;
break;
case 5:
s &= ~Button5Mask;
break;
}
break;
case MotionNotify:
me = (XMotionEvent *)e;
s = me->state;
ms.xy.x = me->x;
ms.xy.y = me->y;
ms.msec = me->time;
break;
default:
return;
}
ms.buttons = 0;
if(s & Button1Mask)
ms.buttons |= 1;
if(s & Button2Mask)
ms.buttons |= 2;
if(s & Button3Mask)
ms.buttons |= 4;
if(s & Button4Mask)
ms.buttons |= 8;
if(s & Button5Mask)
ms.buttons |= 16;
lock(&mouse.lk);
i = mouse.wi;
if(mousequeue) {
if(i == mouse.ri || mouse.lastb != ms.buttons || mouse.trans) {
mouse.wi = (i+1)%Mousequeue;
if(mouse.wi == mouse.ri)
mouse.ri = (mouse.ri+1)%Mousequeue;
mouse.trans = mouse.lastb != ms.buttons;
} else {
i = (i-1+Mousequeue)%Mousequeue;
}
} else {
mouse.wi = (i+1)%Mousequeue;
mouse.ri = i;
}
mouse.queue[i] = ms;
mouse.lastb = ms.buttons;
unlock(&mouse.lk);
wakeup(&mouse.r);
}
void
getcolor(ulong i, ulong *r, ulong *g, ulong *b)
{
ulong v;
v = cmap2rgb(i);
*r = (v>>16)&0xFF;
*g = (v>>8)&0xFF;
*b = v&0xFF;
}
void
setcolor(ulong i, ulong r, ulong g, ulong b)
{
/* no-op */
}
typedef struct Clip Clip;
struct Clip
{
char buf[SnarfSize];
ulong n;
int want, have;
QLock lk;
Rendez vous;
};
Clip clip;
enum {
Chunk = 2048
};
static void
xselect(XEvent *e)
{
XSelectionRequestEvent *q;
XEvent r;
Atom a[4];
char *name;
if(e->type != SelectionRequest)
return;
/*
* The lock is around the whole routine because we use the
* lock to make sure two people aren't sending on xkmcon
* at once.
*/
q = (XSelectionRequestEvent*)e;
r.xselection.property = q->property;
if(q->target == targets) {
a[0] = XA_STRING;
a[1] = utf8string;
a[2] = text;
a[3] = compoundtext;
XChangeProperty(xkmcon, q->requestor, q->property, q->target,
8, PropModeReplace, (uchar*)a, sizeof a);
}else if(q->target == XA_STRING || q->target == utf8string || q->target == text || q->target == compoundtext){
qlock(&clip.lk);
XChangeProperty(xkmcon, q->requestor, q->property, q->target, 8,
PropModeReplace, (uchar*)clip.buf, strlen(clip.buf));
qunlock(&clip.lk);
}else {
name = XGetAtomName(xkmcon, q->target);
if(strcmp(name, "TIMESTAMP") != 0)
fprint(2, "%s: cannot handle selection request for '%s' (%d)\n", argv0, name, (int)q->target);
r.xselection.property = None;
}
r.xselection.type = SelectionNotify;
r.xselection.display = q->display;
r.xselection.requestor = q->requestor;
r.xselection.selection = q->selection;
r.xselection.target = q->target;
r.xselection.time = q->time;
XSendEvent(xkmcon, q->requestor, False, 0, &r);
XFlush(xkmcon);
}
int
haveclip(void *a)
{
return clip.want == clip.have;
}
#undef long /* sic */
char*
clipread(void)
{
Window w;
XEvent e;
Atom type;
unsigned long len, lleft, left, dummy;
int i, fmt, res;
uchar *data;
qlock(&clip.lk);
w = XGetSelectionOwner(xsnarfcon, XA_PRIMARY);
if(w == xdrawable)
data = (uchar*)strdup(clip.buf);
else if(w == None)
data = nil;
else {
/*
* we're supposed to get a notification, but we seem not to,
* so let's just watch and see when the buffer stabilizes.
* if you know how to fix this, mail rsc@plan9.bell-labs.com.
*/
XChangeProperty(xsnarfcon, xdrawable, XA_PRIMARY, XA_STRING, 8, PropModeReplace,
(uchar*)"", 0);
XConvertSelection(xsnarfcon, XA_PRIMARY, XA_STRING, None, xdrawable, CurrentTime);
XFlush(xsnarfcon);
for(i=0; i<30; i++){
osmsleep(100);
XGetWindowProperty(xsnarfcon, xdrawable, XA_STRING, 0, 0, 0, AnyPropertyType,
&type, &fmt, &len, &left, &data);
if(lleft == left && left > 0)
break;
lleft = left;
}
if(left > 0){
res = XGetWindowProperty(xsnarfcon, xdrawable, XA_STRING, 0, left, 0,
AnyPropertyType, &type, &fmt, &len, &dummy, &data);
data = (uchar*)strdup(data);
}else
data = nil;
}
qunlock(&clip.lk);
return (char*)data;
}
int
clipwrite(char *buf)
{
int n;
n = strlen(buf);
qlock(&clip.lk);
if(n >= SnarfSize)
n = SnarfSize - 1;
memmove(clip.buf, buf, n);
clip.buf[n] = 0;
clip.n = n;
/*
* xkmcon so that we get the event in the select loop.
* It seems to be okay to send a message and read an event
* from a Display* at the same time. Let's hope so.
*/
XSetSelectionOwner(xkmcon, XA_PRIMARY, xdrawable, CurrentTime);
XFlush(xkmcon);
qunlock(&clip.lk);
return n;
}
#define long int /* sic */
int
atlocalconsole(void)
{
char *p, *q;
char buf[128];
p = getenv("DISPLAY");
if(p == nil)
return 0;
/* extract host part */
q = strchr(p, ':');
if(q == nil)
return 0;
*q = 0;
if(strcmp(p, "") == 0)
return 1;
/* try to match against system name (i.e. for ssh) */
if(gethostname(buf, sizeof buf) == 0){
if(strcmp(p, buf) == 0)
return 1;
if(strncmp(p, buf, strlen(p)) == 0 && buf[strlen(p)]=='.')
return 1;
}
return 0;
}