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#include <cairo-xlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#include "runes.h"
static char *atom_names[RUNES_NUM_ATOMS] = {
"WM_DELETE_WINDOW",
"_NET_WM_PING",
"_NET_WM_PID",
"_NET_WM_ICON_NAME",
"_NET_WM_NAME",
"UTF8_STRING",
"WM_PROTOCOLS"
};
static void runes_get_next_event(uv_work_t *req)
{
RunesXlibLoopData *data;
data = (RunesXlibLoopData *)req->data;
XNextEvent(data->data.t->w.dpy, &data->e);
}
static void runes_process_event(uv_work_t *req, int status)
{
RunesXlibLoopData *data;
XEvent *e;
RunesTerm *t;
RunesWindowBackend *w;
int should_close = 0;
UNUSED(status);
data = ((RunesXlibLoopData *)req->data);
e = &data->e;
t = data->data.t;
w = &t->w;
if (!XFilterEvent(e, None)) {
switch (e->type) {
case KeyPress: {
char *buf = NULL;
size_t len = 8;
KeySym sym;
Status s;
size_t chars;
buf = malloc(len);
for (;;) {
chars = Xutf8LookupString(w->ic, &e->xkey, buf, len - 1, &sym, &s);
if (s == XBufferOverflow) {
len = chars + 1;
buf = realloc(buf, len);
continue;
}
break;
}
runes_handle_keyboard_event(t, buf, chars);
free(buf);
break;
}
case Expose:
runes_window_backend_flush(t);
break;
case ClientMessage: {
Atom a = e->xclient.data.l[0];
if (a == w->atoms[RUNES_ATOM_WM_DELETE_WINDOW]) {
should_close = 1;
}
else if (a == w->atoms[RUNES_ATOM_NET_WM_PING]) {
e->xclient.window = DefaultRootWindow(w->dpy);
XSendEvent(
w->dpy, e->xclient.window, False,
SubstructureNotifyMask | SubstructureRedirectMask,
e
);
}
break;
}
default:
break;
}
}
if (!should_close) {
uv_queue_work(t->loop, req, runes_get_next_event, runes_process_event);
}
else {
runes_handle_close_window(t);
free(req);
}
}
static void runes_init_wm_properties(RunesWindowBackend *w, int argc, char *argv[])
{
pid_t pid;
XClassHint class_hints = { "runes", "runes" };
XWMHints wm_hints;
XSizeHints normal_hints;
wm_hints.flags = InputHint | StateHint;
wm_hints.input = True;
wm_hints.initial_state = NormalState;
/* XXX */
normal_hints.flags = 0;
XInternAtoms(w->dpy, atom_names, RUNES_NUM_ATOMS, False, w->atoms);
XSetWMProtocols(w->dpy, w->w, w->atoms, RUNES_NUM_PROTOCOL_ATOMS);
Xutf8SetWMProperties(w->dpy, w->w, "runes", "runes", argv, argc, &normal_hints, &wm_hints, &class_hints);
pid = getpid();
XChangeProperty(w->dpy, w->w, w->atoms[RUNES_ATOM_NET_WM_PID], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)&pid, 1);
XChangeProperty(w->dpy, w->w, w->atoms[RUNES_ATOM_NET_WM_ICON_NAME], w->atoms[RUNES_ATOM_UTF8_STRING], 8, PropModeReplace, (unsigned char *)"runes", 5);
XChangeProperty(w->dpy, w->w, w->atoms[RUNES_ATOM_NET_WM_NAME], w->atoms[RUNES_ATOM_UTF8_STRING], 8, PropModeReplace, (unsigned char *)"runes", 5);
}
static void runes_window_init_loop(RunesTerm *t)
{
RunesWindowBackend *w;
unsigned long mask;
void *data;
w = &t->w;
XGetICValues(w->ic, XNFilterEvents, &mask, NULL);
XSelectInput(w->dpy, w->w, mask|KeyPressMask|StructureNotifyMask|ExposureMask);
XSetICFocus(w->ic);
data = malloc(sizeof(RunesXlibLoopData));
((RunesLoopData *)data)->req.data = data;
((RunesLoopData *)data)->t = t;
uv_queue_work(t->loop, data, runes_get_next_event, runes_process_event);
}
void runes_window_backend_init(RunesTerm *t, int argc, char *argv[])
{
RunesWindowBackend *w;
unsigned long white;
XIM im;
w = &t->w;
w->dpy = XOpenDisplay(NULL);
white = WhitePixel(w->dpy, DefaultScreen(w->dpy));
w->w = XCreateSimpleWindow(
w->dpy, DefaultRootWindow(w->dpy),
0, 0, 240, 80, 0, white, white
);
XSelectInput(w->dpy, w->w, StructureNotifyMask);
XMapWindow(w->dpy, w->w);
w->gc = XCreateGC(w->dpy, w->w, 0, NULL);
XSetForeground(w->dpy, w->gc, white);
for (;;) {
XEvent e;
XNextEvent(w->dpy, &e);
if (e.type == MapNotify) {
break;
}
}
XSetLocaleModifiers("");
im = XOpenIM(w->dpy, NULL, NULL, NULL);
w->ic = XCreateIC(
im,
XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
XNClientWindow, w->w,
XNFocusWindow, w->w,
NULL
);
if (w->ic == NULL) {
fprintf(stderr, "failed\n");
exit(1);
}
runes_init_wm_properties(w, argc, argv);
runes_window_init_loop(t);
}
cairo_surface_t *runes_window_backend_surface_create(RunesTerm *t)
{
RunesWindowBackend *w;
Visual *vis;
XWindowAttributes attrs;
w = &t->w;
XGetWindowAttributes(w->dpy, w->w, &attrs);
vis = DefaultVisual(w->dpy, DefaultScreen(w->dpy));
return cairo_xlib_surface_create(w->dpy, w->w, vis, attrs.width, attrs.height);
}
void runes_window_backend_flush(RunesTerm *t)
{
cairo_set_source_surface(t->backend_cr, cairo_get_target(t->cr), 0.0, 0.0);
cairo_paint(t->backend_cr);
XFlush(t->w.dpy);
}
void runes_window_backend_get_size(RunesTerm *t, int *xpixel, int *ypixel)
{
cairo_surface_t *surface;
surface = cairo_get_target(t->backend_cr);
*xpixel = cairo_xlib_surface_get_width(surface);
*ypixel = cairo_xlib_surface_get_height(surface);
}
void runes_window_backend_request_close(RunesTerm *t)
{
XEvent e;
e.xclient.type = ClientMessage;
e.xclient.window = t->w.w;
e.xclient.message_type = t->w.atoms[RUNES_ATOM_WM_PROTOCOLS];
e.xclient.format = 32;
e.xclient.data.l[0] = t->w.atoms[RUNES_ATOM_WM_DELETE_WINDOW];
e.xclient.data.l[1] = CurrentTime;
XSendEvent(t->w.dpy, t->w.w, False, NoEventMask, &e);
}
void runes_window_backend_cleanup(RunesTerm *t)
{
RunesWindowBackend *w;
XIM im;
w = &t->w;
im = XIMOfIC(w->ic);
XDestroyIC(w->ic);
XCloseIM(im);
XFreeGC(w->dpy, w->gc);
XDestroyWindow(w->dpy, w->w);
XCloseDisplay(w->dpy);
}
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