Leave other targets alone for now. I need a clipboard manager.

Makefile

@@ -16,8 +16,10 @@
 
 CC=gcc
 DEBUG=0
+PREFIX=/usr/local
 INCFLAGS=`pkg-config x11 --cflags`
 LDFLAGS=`pkg-config x11 --libs`
+DEFS=-DVERSION=\"1.0\"
 CFLAGS=$(INCFLAGS) -std=c99 -Wall -Wextra -Wfatal-errors -Werror
 HDRS=
 OBJS=src/main.o
@@ -34,7 +36,13 @@ endif
 tinyclip: $(OBJS)
 	$(CC) -o $@ $^ $(LDFLAGS)
 
-.PHONY: clean
+.PHONY: clean distclean install
 
 clean:
 	$(RM) $(OBJS)
+
+distclean: clean
+	$(RM) tinyclip
+
+install: tinyclip
+	install -m 755 tinyclip $(PREFIX)/bin/

README

@@ -3,6 +3,25 @@
 ================
 A tiny clipboard application for X.
 
+# Building
+----------
+## Dependencies
+To compile the project you will require:
+ * C99 compatible compiler (GCC is recommended)
+ * UNIX Make
+ * X11
+
+## Compiling
+The project is built using the `make' command. For debug information
+append `DEBUG=1' to the command.
+
+# Installation
+--------------
+Once the project is built, you can install by running `make install'. By
+default the `PREFIX' variable is set to `/usr/local' (installing the
+binary in `/usr/local/bin'). You can override this by appending
+`PREFIX=<prefix>' to the install command.
+
 # License
 ---------
 This project is licensed under the GNU General Public License version 3

TODO

@@ -0,0 +1,5 @@
+============
+*** TODO ***
+============
+ - Setup response for INCR
+ - Implement most common plain text targets

src/main.c

@@ -19,41 +19,114 @@
 #include <signal.h>
 #include <stdio.h>
 #include <time.h>
+#include <stdlib.h>
+#include <string.h>
 #include <X11/Xlib.h>
 
+Display *display;
+Window clip_win;
 int run;
 void *data;
 size_t data_size;
 
 void quit() {
 	run = 0;
+	XClientMessageEvent cme;
+	cme.type = ClientMessage;
+	cme.format = 32;
+	XSendEvent(display, clip_win, 0, 0, (XEvent*)&cme);
+	XFlush(display);
 }
 
-void send_selection(Display *display, XSelectionRequestEvent *sre, Atom utf8) {
-	XSelectionEvent se;
-	time_t now_tm;
-	char *now;
+void get_selection(Atom property) {
+	Atom da, incr, type;
+	int di;
+	unsigned long size, dul;
+	unsigned char *prop_ret = NULL;
 
-	now_tm = time(NULL);
-	now = ctime(&now_tm);
+	XGetWindowProperty(display, clip_win, property, 0, 0, 0, AnyPropertyType,
+			&type, &di, &dul, &size, &prop_ret);
+	XFree(prop_ret);
+
+	incr = XInternAtom(display, "INCR", 0);
+	if(type == incr)
+	{
+		// TODO: prepare for multiple messages
+		return;
+	}
 
 #ifdef DEBUG
-	char *an = XGetAtomName(display, sre->property);
-	printf("Sending CLIPBOARD to window 0x%1x, property '%s'\n", sre->requestor, an);
-	if(an)
-		XFree(an);
+	printf("Property size: %lu\n", size);
+#endif
+	XGetWindowProperty(display, clip_win, property, 0, size, 0, AnyPropertyType,
+			&da, &di, &dul, &dul, &prop_ret);
+	free(data);
+	data = malloc(size);
+	strcpy(data, (void*)prop_ret);
+	data_size = size;
+#ifdef DEBUG
+	printf("Received data: %s\n", (char*)data);
+#endif
+	XFree(prop_ret);
+	XDeleteProperty(display, clip_win, property);
+}
+
+void send_reject(XSelectionRequestEvent *sre) {
+	XSelectionEvent reply_se;
+
+#ifdef DEBUG
+	char *target_name;
+	target_name = XGetAtomName(display, sre->target);
+	printf("Denying request for type `%s'\n", target_name);
+	if(target_name)
+		XFree(target_name);
 #endif
 
-	XChangeProperty(display, sre->requestor, sre->property, utf8, 8, PropModeReplace, data, data_size);
+	reply_se.type = SelectionNotify;
+	reply_se.requestor = sre->requestor;
+	reply_se.selection = sre->selection;
+	reply_se.target = sre->target;
+	reply_se.property = None;
+	reply_se.time = sre->time;
 
+	XSendEvent(display, sre->requestor, 1,
+			NoEventMask, (XEvent*)&reply_se);
+}
+
+void send_selection(XSelectionRequestEvent *sre, Atom target)
+{
+	XSelectionEvent reply_se;
+
+#ifdef DEBUG
+	char *target_name = XGetAtomName(display, sre->property);
+	printf("Sending CLIPBOARD to window 0x%1x, property '%s'\n",
+			(unsigned int)sre->requestor, target_name);
+	if(target_name)
+		XFree(target_name);
+#endif
+
+	XChangeProperty(display, sre->requestor, sre->property,
+			target, 8, PropModeReplace, (unsigned char*)data, data_size);
+
+	reply_se.type = SelectionNotify;
+	reply_se.requestor = sre->requestor;
+	reply_se.selection = sre->selection;
+	reply_se.target = sre->target;
+	reply_se.property = sre->property;
+	reply_se.time = sre->time;
+
+	XSendEvent(display, sre->requestor, 1,
+			NoEventMask, (XEvent*)&reply_se);
 }
 
 int main() {
-	Display *display;
-	Window clip_win, root, owner;
+	Window root, owner;
 	int screen;
-	Atom selection, utf8, clip_property;
-	XEvent event;
+	Atom selection, clip_property;
+	// target atoms
+	Atom utf8_target;//, text_target, string_target;
+	data = NULL;
+	data_size = 0;
 
 	// get current X display
 	display = XOpenDisplay(NULL);
@@ -68,11 +141,13 @@ int main() {
 	// create a dummy window for tinyclip
 	clip_win = XCreateSimpleWindow(display, root, -10, -10, 1, 1, 0, 0, 0);
 	XSelectInput(display, clip_win,
-			SelectionClear | SelectionRequest | SelectionNotify);
+			SelectionClear | SelectionRequest | SelectionNotify | ClientMessage);
 
 	// create atoms for selections
 	selection = XInternAtom(display, "CLIPBOARD", 0);
-	utf8 = XInternAtom(display, "UTF8_STRING", 0);
+	utf8_target = XInternAtom(display, "UTF8_STRING", 0);
+	//text_target = XInternAtom(display, "TEXT", 0);
+	//string_target = XInternAtom(display, "STRING", 0);
 	clip_property = XInternAtom(display, "TINYCLIP", 0);
 
 	// check if there is currently someone using the clipboard
@@ -81,9 +156,9 @@ int main() {
 	{
 		// take ownership of clipboard while copying contents
 #ifdef DEBUG
-		printf("Current owner: 0x%1X\n", owner);
+		printf("Current owner: 0x%1X\n", (unsigned int)owner);
 #endif
-		XConvertSelection(display, selection, utf8,
+		XConvertSelection(display, selection, utf8_target,
 				clip_property, clip_win, CurrentTime);
 	}
 	else
@@ -94,29 +169,29 @@ int main() {
 	run = 1;
 	signal(SIGINT, quit);
 
+	Atom wmDeleteMessage = XInternAtom(display, "WM_DELETE_WINDOW", 0);
+	XSetWMProtocols(display, clip_win, &wmDeleteMessage, 1);
+
 	while(run)
 	{
-		XNextEvent(display, &event);
+		XEvent event;
 		XSelectionRequestEvent *sre;
 		XSelectionEvent *se;
+		XNextEvent(display, &event);
 		switch(event.type)
 		{
 			case SelectionClear:
 				// if someone else took the clipboard, regain ownership
-#ifdef DEBUG
-				printf("Lost selection.\n");
-#endif
-				XConvertSelection(display, selection, utf8,
+				XConvertSelection(display, selection, utf8_target,
 						clip_property, clip_win, CurrentTime);
 				break;
 			case SelectionNotify:
+				// we've been sent the new CLIPBOARD, now we take ownership of it
 				se = (XSelectionEvent*)&event.xselection;
 				if(se->property == None)
 					fprintf(stderr, "Conversion impossible.");
 				else
-				{
-					// TODO: handle new clipboard information
-				}
+					get_selection(clip_property);
 				XSetSelectionOwner(display, selection, clip_win, CurrentTime);
 				break;
 			case SelectionRequest:
@@ -124,9 +199,14 @@ int main() {
 				sre = (XSelectionRequestEvent*) &event.xselectionrequest;
 #ifdef DEBUG
 				printf("New selection request:\n"
-						"  requestor: 0x%1x\n", sre->requestor);
+						"  requestor: 0x%1x\n", (unsigned int)sre->requestor);
 #endif
-				send_selection(display, sre, utf8);
+				if(sre->target != utf8_target || sre->property == None)
+					send_reject(sre);
+				else
+					send_selection(sre, utf8_target);
+				break;
+			case ClientMessage:
 				break;
 		}
 	}