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toxic/src/xtra.c

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/* xtra.c
*
*
* Copyright (C) 2014 Toxic All Rights Reserved.
*
* This file is part of Toxic.
*
* Toxic is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Toxic is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Toxic. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "xtra.h"
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <pthread.h>
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
const Atom XtraTerminate = 1;
const Atom XtraNil = 0;
static Atom XdndAware;
static Atom XdndEnter;
static Atom XdndLeave;
static Atom XdndPosition;
static Atom XdndStatus;
static Atom XdndDrop;
static Atom XdndSelection;
static Atom XdndDATA;
static Atom XdndTypeList;
static Atom XdndActionCopy;
static Atom XdndFinished;
struct _Xtra {
drop_callback on_drop;
Display *display;
Window terminal_window;
Window proxy_window;
Window source_window; /* When we have a drop */
Atom handling_version;
Atom expecting_type;
} Xtra;
typedef struct _Property {
unsigned char *data;
int read_format;
unsigned long read_num;
Atom read_type;
} Property;
Property read_property(Window s, Atom p)
{
Atom read_type;
int read_format;
unsigned long read_num;
unsigned long left_bytes;
unsigned char *data = NULL;
int read_bytes = 1024;
/* Keep trying to read the property until there are no bytes unread */
do {
if (data) XFree(data);
XGetWindowProperty(Xtra.display, s,
p, 0,
read_bytes,
False, AnyPropertyType,
&read_type, &read_format,
&read_num, &left_bytes,
&data);
read_bytes *= 2;
} while (left_bytes != 0);
Property property = {data, read_format, read_num, read_type};
return property;
}
Atom get_dnd_type(long *a, int l)
{
int i = 0;
for (; i < l; i ++) {
if (a[i] != XtraNil) return a[i]; /* Get first valid */
}
return XtraNil;
}
/* TODO maybe support only certain types in the future */
static void handle_xdnd_enter(XClientMessageEvent *e)
{
Xtra.handling_version = (e->data.l[1] >> 24);
if ((e->data.l[1] & 1)) {
// Fetch the list of possible conversions
Property p = read_property(e->data.l[0], XdndTypeList);
Xtra.expecting_type = get_dnd_type((long *)p.data, p.read_num);
XFree(p.data);
} else {
// Use the available list
Xtra.expecting_type = get_dnd_type(e->data.l + 2, 3);
}
}
static void handle_xdnd_position(XClientMessageEvent *e)
{
XEvent ev = {
.xclient = {
.type = ClientMessage,
.display = e->display,
.window = e->data.l[0],
.message_type = XdndStatus,
.format = 32,
.data = {
.l = {
Xtra.proxy_window,
(Xtra.expecting_type != XtraNil),
0, 0,
XdndActionCopy
}
}
}
};
XSendEvent(Xtra.display, e->data.l[0], False, NoEventMask, &ev);
XFlush(Xtra.display);
}
static void handle_xdnd_drop(XClientMessageEvent *e)
{
/* Not expecting any type */
if (Xtra.expecting_type == XtraNil) {
XEvent ev = {
.xclient = {
.type = ClientMessage,
.display = e->display,
.window = e->data.l[0],
.message_type = XdndFinished,
.format = 32,
.data = {
.l = {Xtra.proxy_window, 0, 0}
}
}
};
XSendEvent(Xtra.display, e->data.l[0], False, NoEventMask, &ev);
} else {
Xtra.source_window = e->data.l[0];
XConvertSelection(Xtra.display,
XdndSelection,
Xtra.expecting_type,
XdndSelection,
Xtra.proxy_window,
Xtra.handling_version >= 1 ? e->data.l[2] : CurrentTime);
}
}
static void handle_xdnd_selection(XSelectionEvent *e)
{
/* DnD succesfully finished, send finished and call callback */
XEvent ev = {
.xclient = {
.type = ClientMessage,
.display = Xtra.display,
.window = Xtra.source_window,
.message_type = XdndFinished,
.format = 32,
.data = {
.l = {Xtra.proxy_window, 1, XdndActionCopy}
}
}
};
XSendEvent(Xtra.display, Xtra.source_window, False, NoEventMask, &ev);
Property p = read_property(Xtra.proxy_window, XdndSelection);
DropType dt;
if (strcmp(XGetAtomName(Xtra.display, p.read_type), "text/uri-list") == 0)
dt = DT_file_list;
else /* text/uri-list */
dt = DT_plain;
/* Call callback for every entry */
if (Xtra.on_drop && p.read_num) {
char *sptr;
char *str = strtok_r((char *) p.data, "\n\r", &sptr);
if (str) Xtra.on_drop(str, dt);
while ((str = strtok_r(NULL, "\n\r", &sptr)))
Xtra.on_drop(str, dt);
}
if (p.data) XFree(p.data);
}
void *event_loop(void *p)
{
/* Handle events like a real nigga */
(void) p; /* DINDUNOTHIN */
XEvent event;
int pending;
while (Xtra.display) {
/* NEEDMOEVENTSFODEMPROGRAMS */
XLockDisplay(Xtra.display);
if ((pending = XPending(Xtra.display))) XNextEvent(Xtra.display, &event);
if (!pending) {
XUnlockDisplay(Xtra.display);
usleep(10000);
continue;
}
if (event.type == ClientMessage) {
Atom type = event.xclient.message_type;
if (type == XdndEnter) handle_xdnd_enter(&event.xclient);
else if (type == XdndPosition) handle_xdnd_position(&event.xclient);
else if (type == XdndDrop) handle_xdnd_drop(&event.xclient);
else if (type == XtraTerminate) break;
} else if (event.type == SelectionNotify) handle_xdnd_selection(&event.xselection);
/* AINNOBODYCANHANDLEDEMEVENTS*/
else XSendEvent(Xtra.display, Xtra.terminal_window, 0, 0, &event);
XUnlockDisplay(Xtra.display);
}
/* Actual XTRA termination
* Please call xtra_terminate() at exit
* otherwise HEWUSAGUDBOI happens
*/
if (Xtra.display) XCloseDisplay(Xtra.display);
return (Xtra.display = NULL);
}
int init_xtra(drop_callback d)
{
memset(&Xtra, 0, sizeof(Xtra));
if (!d) return -1;
else Xtra.on_drop = d;
XInitThreads();
if ( !(Xtra.display = XOpenDisplay(NULL))) return -1;
Xtra.terminal_window = focused_window_id();
/* OSX: if focused window is 0, it means toxic is ran from
* native terminal and not X11 terminal window, silently exit */
if (!Xtra.terminal_window)
return 0;
{
/* Create an invisible window which will act as proxy for the DnD operation. */
XSetWindowAttributes attr = {0};
attr.event_mask = EnterWindowMask |
LeaveWindowMask |
ButtonMotionMask |
ButtonPressMask |
ButtonReleaseMask |
ResizeRedirectMask;
attr.do_not_propagate_mask = NoEventMask;
Window root;
int x, y;
unsigned int wht, hht, b, d;
/* Since we cannot capture resize events for parent window we will have to create
* this window to have maximum size as defined in root window
*/
XGetGeometry(Xtra.display,
XDefaultRootWindow(Xtra.display),
&root, &x, &y, &wht, &hht, &b, &d);
if (! (Xtra.proxy_window = XCreateWindow
(Xtra.display, Xtra.terminal_window, /* Parent */
0, 0, /* Position */
wht, hht, /* Width + height */
0, /* Border width */
CopyFromParent, /* Depth */
InputOnly, /* Class */
CopyFromParent, /* Visual */
CWEventMask | CWCursor, /* Value mask */
&attr)) ) /* Attributes for value mask */
return -1;
}
XMapWindow(Xtra.display, Xtra.proxy_window); /* Show window (sandwich) */
XLowerWindow(Xtra.display, Xtra.proxy_window); /* Don't interfere with parent lmao */
XdndAware = XInternAtom(Xtra.display, "XdndAware", False);
XdndEnter = XInternAtom(Xtra.display, "XdndEnter", False);
XdndLeave = XInternAtom(Xtra.display, "XdndLeave", False);
XdndPosition = XInternAtom(Xtra.display, "XdndPosition", False);
XdndStatus = XInternAtom(Xtra.display, "XdndStatus", False);
XdndDrop = XInternAtom(Xtra.display, "XdndDrop", False);
XdndSelection = XInternAtom(Xtra.display, "XdndSelection", False);
XdndDATA = XInternAtom(Xtra.display, "XdndDATA", False);
XdndTypeList = XInternAtom(Xtra.display, "XdndTypeList", False);
XdndActionCopy = XInternAtom(Xtra.display, "XdndActionCopy", False);
XdndFinished = XInternAtom(Xtra.display, "XdndFinished", False);
/* Inform my nigga windows that we are aware of dnd */
Atom XdndVersion = 3;
XChangeProperty(Xtra.display,
Xtra.proxy_window,
XdndAware,
XA_ATOM,
32,
PropModeReplace,
(unsigned char *)&XdndVersion, 1);
pthread_t id;
if (pthread_create(&id, NULL, event_loop, NULL) != 0)
return -1;
pthread_detach(id);
return 0;
}
void terminate_xtra()
{
if (!Xtra.display || !Xtra.terminal_window) return;
XEvent terminate = {
.xclient = {
.type = ClientMessage,
.display = Xtra.display,
.message_type = XtraTerminate,
}
};
XLockDisplay(Xtra.display);
XDeleteProperty(Xtra.display, Xtra.proxy_window, XdndAware);
XSendEvent(Xtra.display, Xtra.proxy_window, 0, NoEventMask, &terminate);
XUnlockDisplay(Xtra.display);
while (Xtra.display); /* Wait for termination */
}
long unsigned int focused_window_id()
{
if (!Xtra.display) return 0;
Window focus;
int revert;
XLockDisplay(Xtra.display);
XGetInputFocus(Xtra.display, &focus, &revert);
XUnlockDisplay(Xtra.display);
return focus;
}
int is_focused()
{
return Xtra.proxy_window == focused_window_id() || Xtra.terminal_window == focused_window_id();
}
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