From 10b676a2fee216cc00d2ca090a93a23d8b47241f Mon Sep 17 00:00:00 2001
From: Joursoir <chat@joursoir.net>
Date: Mon, 1 Mar 2021 18:44:44 +0000
Subject: add routines for Xlib

---
 src/r-x11.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/r-x11.h |  24 ++++++++++++++
 2 files changed, 129 insertions(+)
 create mode 100644 src/r-x11.c
 create mode 100644 src/r-x11.h

diff --git a/src/r-x11.c b/src/r-x11.c
new file mode 100644
index 0000000..0e68225
--- /dev/null
+++ b/src/r-x11.c
@@ -0,0 +1,105 @@
+/***
+	This file is part of LockPassword
+	Copyright (C) 2020-2021 Aleksandr D. Goncharov (Joursoir) <chat@joursoir.net>
+
+	This program 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.
+
+	This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+***/
+
+#if defined(DISPLAY)
+
+#include <stdio.h>
+#include <string.h>
+#include <X11/Xlib.h>
+
+#include "constants.h"
+
+static Atom X_utf8;
+
+static void send_data(Display *dpy, XSelectionRequestEvent *sev,
+	const char *data)
+{
+	XSelectionEvent ssev;
+	Atom target = sev->target;
+	char *an;
+
+	an = XGetAtomName(dpy, target);
+	if(an) {
+		dbgprint("Request of type '%s'\n", an);
+		XFree(an);
+	}
+
+	/* All of these should match the values of the request. */
+	ssev.type = SelectionNotify;
+	ssev.requestor = sev->requestor;
+	ssev.selection = sev->selection;
+	ssev.target = target;
+	ssev.property = None; // means refusal
+	ssev.time = sev->time;
+
+	if(target == X_utf8) {
+		an = XGetAtomName(dpy, sev->property);
+		if(an) {
+			dbgprint("Sending data, property '%s'\n", sev->requestor, an);
+			XFree(an);
+		}
+
+		ssev.property = sev->property;
+		XChangeProperty(dpy, sev->requestor, sev->property, X_utf8, 8,
+			PropModeReplace, (unsigned char *)data, strlen(data));
+	}
+	else {
+		dbgprint("No valid target. Refuse request.\n");
+	}
+
+	XSendEvent(dpy, sev->requestor, True, NoEventMask, (XEvent *)&ssev);
+}
+
+int run_clipboard(char *data)
+{
+	Display *dpy;
+	Window owner, root;
+	int screen;
+	Atom sel;
+	XEvent ev;
+	XSelectionRequestEvent *sev;
+
+	dpy = XOpenDisplay(NULL); // means use env $DISPLAY
+	if(!dpy)
+		errprint(1, "Open X display failed\n");
+
+	screen = DefaultScreen(dpy);
+	root = RootWindow(dpy, screen);
+	owner = XCreateSimpleWindow(dpy, root, -10, -10, 1, 1, 0, 0, 0);
+
+	sel = XInternAtom(dpy, "CLIPBOARD", False);
+	X_utf8 = XInternAtom(dpy, "UTF8_STRING", False);
+
+	XSetSelectionOwner(dpy, sel, owner, CurrentTime);
+	for(;;)
+	{
+		XNextEvent(dpy, &ev);
+		switch(ev.type) {
+		case SelectionClear:
+			dbgprint("Lost 'CLIPBOARD' ownership\n");
+			return 2;
+		case SelectionRequest:
+			sev = (XSelectionRequestEvent *)&ev.xselectionrequest;
+			dbgprint("SelectionRequest by 0x%lx\n", sev->requestor);
+
+			send_data(dpy, sev, data);
+		}
+	}
+}
+
+#endif /* defined(DISPLAY) */
diff --git a/src/r-x11.h b/src/r-x11.h
new file mode 100644
index 0000000..b331bb4
--- /dev/null
+++ b/src/r-x11.h
@@ -0,0 +1,24 @@
+#ifndef LPASS_RX11_H
+#define LPASS_RX11_H
+
+/***
+	This file is part of LockPassword
+	Copyright (C) 2020-2021 Aleksandr D. Goncharov (Joursoir) <chat@joursoir.net>
+
+	This program 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.
+
+	This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+***/
+
+int run_clipboard(char *data);
+
+#endif /* LPASS_RX11_H */
-- 
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