add x11 clipboard

platform.d

@@ -159,6 +159,16 @@ struct InputEvent
 	i32   rel_y;
 }
 
+enum ClipboardMode
+{
+	Clipboard,
+	Primary,
+	Selection = Primary,
+	Secondary,
+	Max
+}
+
+alias CBM = ClipboardMode;
 
 struct Inputs
 {
@@ -166,6 +176,24 @@ struct Inputs
 	Arena               arena;
 }
 
+pragma(inline) bool
+Shift(Modifier md)
+{
+	return cast(bool)(md & (MD.LeftShift | MD.RightShift));
+}
+
+pragma(inline) bool
+Ctrl(Modifier md)
+{
+	return cast(bool)(md & (MD.LeftCtrl | MD.RightCtrl));
+}
+
+pragma(inline) bool
+Alt(Modifier md)
+{
+	return cast(bool)(md & (MD.LeftAlt | MD.RightAlt));
+}
+
 Inputs*
 GetEvents(PlatformWindow* window)
 {
@@ -347,6 +375,7 @@ import core.sys.posix.dlfcn;
 import core.sys.posix.sys.mman;
 import core.sys.linux.sys.inotify;
 import core.sys.linux.fcntl;
+import core.sys.posix.sys.time : timespec, timeval, gettimeofday;
 import core.sys.posix.unistd;
 import core.sys.posix.pthread : PThread = pthread_t, 
 			 													PThreadCond = pthread_cond_t, 
@@ -358,10 +387,14 @@ import core.sys.posix.pthread : PThread = pthread_t,
 																PThreadCondWait = pthread_cond_wait,
 																PThreadMutexUnlock = pthread_mutex_unlock,
 																PThreadCondSignal = pthread_cond_signal,
-																PThreadExit = pthread_exit;
+																PThreadExit = pthread_exit,
+																PThreadCondTimedWait = pthread_cond_timedwait;
 
 import core.stdc.string : strlen;
 
+const u32 X11_CB_TRANSFER_SIZE_DEFAULT = 1048576;
+const u32 X11_TIMEOUT_DEFAULT = 1500;
+
 struct SysThread
 {
 	PThread      handle;
@@ -369,6 +402,40 @@ struct SysThread
 	PThreadMutex mut;
 }
 
+struct Selection
+{
+	bool       owned;
+	u8[]       data;
+	xcb_atom_t target;
+	xcb_atom_t xmode;
+}
+
+enum Atoms
+{
+	Targets,
+	Multiple,
+	Timestamp,
+	Incr,
+	Clipboard,
+	Utf8String,
+	WMProtocols,
+	DeleteWindow,
+	StateHidden,
+	Max,
+}
+
+const char[][] ATOM_STRS = [
+	CastStr!(char)("TARGETS"),
+	CastStr!(char)("MULTIPLE"),
+	CastStr!(char)("TIMESTAMP"),
+	CastStr!(char)("INCR"),
+	CastStr!(char)("CLIPBOARD"),
+	CastStr!(char)("UTF8_STRING"),
+	CastStr!(char)("WM_PROTOCOLS"),
+	CastStr!(char)("WM_DELETE_WINDOW"),
+	CastStr!(char)("_NET_WM_STATE_HIDDEN"),
+];
+
 alias PThreadProc = extern (C) void* function(void*);
 
 SysThread
@@ -442,12 +509,11 @@ PushMotion(Inputs* inputs, i32 rel_x, i32 rel_y, i32 x, i32 y)
 
 struct PlatformWindow
 {
+	xcb_atom_t[Atoms.max] atoms;
 	Display*                 display;
 	xcb_connection_t*        conn;
 	xcb_screen_t*            screen;
 	xcb_window_t 		 	       window;
-	xcb_atom_t				close_event;
-	xcb_atom_t				minimize_event;
 	u16								       w;
 	u16								       h;
 	i32								       mouse_prev_x;
@@ -461,6 +527,10 @@ struct PlatformWindow
 	u32                      input_idx;
 	Inputs[2]					       inputs;
 	TicketMut                input_mutex;
+
+	Mut                      cb_mut;
+	Selection[CBM.max]       selections;
+	version(linux) u32       cb_transfer_size;
 };
 
 struct Library
@@ -496,12 +566,18 @@ CreateWindow(string name, u16 width, u16 height)
 		h: height,
 		input_mutex: CreateTicketMut(),
 		msg_queue: CreateMessageQueue(),
+		cb_mut: CreateMut(),
 		inputs: [
 			{ arena: CreateArena(MB(1)) },
 			{ arena: CreateArena(MB(1)) },
 		],
 	};
 
+	version(linux)
+	{
+		window.cb_transfer_size = X11_CB_TRANSFER_SIZE_DEFAULT;
+	}
+
 	assert(width > 0 && height > 0, "CreateWindow error: width and height must be above 0");
 	
 	window.display = XOpenDisplay(null);
@@ -523,7 +599,8 @@ CreateWindow(string name, u16 width, u16 height)
 									 XCB_EVENT_MASK_BUTTON_PRESS		|
 									 XCB_EVENT_MASK_BUTTON_RELEASE	|
 									 XCB_EVENT_MASK_POINTER_MOTION	|
-									 XCB_EVENT_MASK_STRUCTURE_NOTIFY;
+									 XCB_EVENT_MASK_STRUCTURE_NOTIFY|
+									 XCB_EVENT_MASK_PROPERTY_CHANGE;
 
 	i32[2] val_win = [window.screen.black_pixel, event_mask];
 	i32 val_mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
@@ -568,42 +645,36 @@ CreateWindow(string name, u16 width, u16 height)
 	CheckErr(&window, &cookie, error, "xcb_change_property_checked failure");
 	pureFree(error);
 
-	xcb_intern_atom_cookie_t c_proto = xcb_intern_atom(window.conn, 1, 12, "WM_PROTOCOLS");
+	for(u64 i = 0; i < Atoms.max; i += 1)
-	xcb_intern_atom_reply_t *r_proto = xcb_intern_atom_reply(window.conn, c_proto, &error);
+	{
-	CheckErr(&window, &cookie, error, "xcb_intern_atom WM_PROTOCOLS failure");
+		xcb_intern_atom_cookie_t intern = xcb_intern_atom(window.conn, 1, cast(u16)ATOM_STRS[i].length, ATOM_STRS[i].ptr);
-	pureFree(error);
+		xcb_intern_atom_reply_t* reply = xcb_intern_atom_reply(window.conn, intern, &error);
+		CheckErr(&window, &cookie, error, "xcb_intern_atom failure");
 
-	xcb_intern_atom_cookie_t c_close = xcb_intern_atom(window.conn, 0, 16, "WM_DELETE_WINDOW");
+		window.atoms[i] = reply.atom;
-	xcb_intern_atom_reply_t *r_close = xcb_intern_atom_reply(window.conn, c_close, &error);
-	CheckErr(&window, &cookie, error, "xcb_intern_atom WM_DELETE_WINDOW failure");
-	pureFree(error);
 
-	xcb_intern_atom_cookie_t c_minimize = xcb_intern_atom(window.conn, 0, 20, "_NET_WM_STATE_HIDDEN");
-	xcb_intern_atom_reply_t *r_minimize = xcb_intern_atom_reply(window.conn, c_minimize, &error);
-	CheckErr(&window, &cookie, error, "xcb_intern_atom _NET_WM_STATE_HIDDEN failure");
 		pureFree(error);
+		pureFree(reply);
+	}
+
+	window.selections[CBM.Clipboard].xmode = window.atoms[Atoms.Clipboard];
+	window.selections[CBM.Primary].xmode   = XCB_ATOM_PRIMARY;
+	window.selections[CBM.Secondary].xmode = XCB_ATOM_SECONDARY;
 
 	cookie = xcb_change_property_checked(
 		window.conn,
 		XCB_PROP_MODE_REPLACE,
 		window.window,
-		r_proto.atom,
+		window.atoms[Atoms.WMProtocols],
 		XCB_ATOM_ATOM,
 		32,
 		1,
-		&r_close.atom
+		&window.atoms[Atoms.DeleteWindow]
 	);
 	error = xcb_request_check(window.conn, cookie);
 	CheckErr(&window, &cookie, error, "xcb_change_property_checked failure");
 	pureFree(error);
 
-	window.close_event = r_close.atom;
-	window.minimize_event = r_minimize.atom;
-
-	pureFree(r_proto);
-	pureFree(r_close);
-	pureFree(r_minimize);
-
 	xcb_map_window(window.conn, window.window);
 
 	i32 stream_result = xcb_flush(window.conn);
@@ -699,6 +770,333 @@ FlushEvents(PlatformWindow* window)
 	} while (e);
 }
 
+bool
+TransmitSelection(PlatformWindow* w, xcb_selection_request_event_t* ev)
+{
+	bool result;
+	if(ev.property == XCB_NONE)
+	{
+		ev.property = ev.target;
+	}
+
+	if(ev.target == w.atoms[Atoms.Targets])
+	{
+		xcb_atom_t[3] targets = [
+			w.atoms[Atoms.Timestamp],
+			w.atoms[Atoms.Targets],
+			w.atoms[Atoms.Utf8String]
+		];
+
+		xcb_change_property(
+			w.conn,
+			XCB_PROP_MODE_REPLACE,
+			ev.requestor,
+			ev.property,
+			XCB_ATOM_ATOM,
+			xcb_atom_t.sizeof * 8,
+			targets.length,
+			targets.ptr
+		);
+
+		result = true;
+	}
+	else if(ev.target == w.atoms[Atoms.Timestamp])
+	{
+		xcb_timestamp_t cur = XCB_CURRENT_TIME;
+		xcb_change_property(
+			w.conn,
+			XCB_PROP_MODE_REPLACE,
+			ev.requestor,
+			ev.property,
+			XCB_ATOM_INTEGER,
+			cur.sizeof * 8,
+			1,
+			&cur
+		);
+
+		result = true;
+	}
+	else if(ev.target == w.atoms[Atoms.Utf8String])
+	{
+		Selection* sel = null;
+		if(TryLock(&w.cb_mut))
+		{
+			foreach(i; CBM.min .. CBM.max)
+			{
+				if(w.selections[i].xmode == ev.selection)
+				{
+					sel = &w.selections[i];
+					break;
+				}
+			}
+
+			if(sel != null && sel.owned && sel.data.length > 0 && sel.target == ev.target)
+			{
+				xcb_change_property(
+					w.conn,
+					XCB_PROP_MODE_REPLACE,
+					ev.requestor,
+					ev.property,
+					ev.target,
+					8,
+					cast(u32)sel.data.length,
+					sel.data.ptr
+				);
+
+				result = true;
+			}
+
+			Unlock(&w.cb_mut);
+		}
+	}
+
+	return result;
+}
+
+bool
+ClipboardOwns(PlatformWindow* w, ClipboardMode mode)
+{
+	bool result;
+
+	if(TryLock(&w.cb_mut))
+	{
+		result = w.selections[mode].owned;
+		Unlock(&w.cb_mut);
+	}
+
+	return result;
+}
+
+u8[]
+ClipboardText(PlatformWindow* w, ClipboardMode mode)
+{
+	u8[] buf;
+
+	if(TryLock(&w.cb_mut))
+	{
+		scope(exit) Unlock(&w.cb_mut);
+
+		Selection* sel = &w.selections[mode];
+
+		if(sel.owned)
+		{
+			buf = GetClipboardSelection(w, sel);
+		}
+		else
+		{
+			timeval now;
+			timespec timeout;
+			int pret = 0;
+
+			auto owner = xcb_get_selection_owner_reply(w.conn, xcb_get_selection_owner(w.conn, sel.xmode), null);
+			scope(exit) pureFree(owner);
+
+			if(owner != null && owner.owner != 0)
+			{
+				FreeArray(sel.data);
+				sel.data = [];
+
+				sel.target = w.atoms[Atoms.Utf8String];
+				xcb_convert_selection(w.conn, w.window, sel.xmode, sel.target, sel.xmode, XCB_CURRENT_TIME);
+				xcb_flush(w.conn);
+
+				gettimeofday(&now, null);
+
+				timeout.tv_sec  = now.tv_sec + (X11_TIMEOUT_DEFAULT / 1000);
+				timeout.tv_nsec = (now.tv_usec * 1000UL) * ((X11_TIMEOUT_DEFAULT % 1000) * 1000000UL);
+				if(timeout.tv_nsec >= 1000000000UL)
+				{
+					timeout.tv_sec += timeout.tv_nsec / 1000000000UL;
+					timeout.tv_nsec = timeout.tv_nsec % 1000000000UL;
+				}
+
+				while(pret == 0 && sel.data.length == 0)
+				{
+					pret = PThreadCondTimedWait(&w.thread.cond, &w.thread.mut, &timeout);
+				}
+
+				GetClipboardSelection(w, sel);
+			}
+		}
+	}
+
+	return buf;
+}
+
+u8[]
+ClipboardText(PlatformWindow* w)
+{
+	return ClipboardText(w, CBM.Clipboard);
+}
+
+bool
+SetClipboard(PlatformWindow* w, u8[] data, ClipboardMode mode)
+{
+	bool result = true;
+
+	if(data.length > 0 && TryLock(&w.cb_mut))
+	{
+		Selection* sel = &w.selections[mode];
+		if(sel.data.length > 0)
+		{
+			FreeArray(sel.data);
+			sel.data = [];
+		}
+
+		sel.data = Alloc!(u8)(data.length+1);
+		if(sel.data.length > 0)
+		{
+			MemCpy(sel.data.ptr, data.ptr, data.length);
+
+			sel.data[sel.data.length-1] = '\0';
+			sel.owned = true;
+			sel.target = w.atoms[Atoms.Utf8String];
+
+			xcb_set_selection_owner(w.conn, w.window, sel.xmode, XCB_CURRENT_TIME);
+			xcb_flush(w.conn);
+		}
+		else
+		{
+			result = false;
+		}
+	}
+
+	return result;
+}
+
+bool
+SetClipboard(PlatformWindow* w, u8[] data)
+{
+	return SetClipboard(w, data, CBM.Clipboard);
+}
+
+u8[]
+GetClipboardSelection(PlatformWindow* w, Selection* sel)
+{
+	u8[] buf;
+
+	if(sel.data.length > 0 && sel.target == w.atoms[Atoms.Utf8String])
+	{
+		buf = ScratchAllocCopy(sel.data);
+	}
+
+	return buf;
+}
+
+void
+RetrieveSelection(PlatformWindow* w, xcb_selection_notify_event_t* ev)
+{
+	u8[] buf;
+	u64 buf_size;
+	u64 bytes_after = 1;
+	xcb_get_property_reply_t* reply;
+	xcb_atom_t actual_type;
+	u8 actual_format;
+
+	if(ev.property == XCB_ATOM_PRIMARY || ev.property == XCB_ATOM_SECONDARY || ev.property == w.atoms[Atoms.Clipboard])
+	{
+		while(bytes_after > 0)
+		{
+			scope(exit) pureFree(reply);
+
+			xcb_get_property_cookie_t cookie = xcb_get_property(
+				w.conn,
+				true,
+				w.window,
+				ev.property,
+				XCB_ATOM_ANY,
+				cast(u32)(buf_size/4), 
+				cast(u32)(w.cb_transfer_size/4)
+			);
+
+			reply = xcb_get_property_reply(w.conn, cookie, null);
+
+			if(reply == null || (buf_size > 0 && (reply.format != actual_format || reply.type != actual_type)) || reply.format%8 != 0)
+			{
+				Errf("RetrieveSelection failure: Invalid return value from xcb_get_property_reply");
+				break;
+			}
+
+			if(buf_size == 0)
+			{
+				actual_type   = reply.type;
+				actual_format = reply.format;
+			}
+
+			int nitems = xcb_get_property_value_length(reply);
+			if(nitems > 0)
+			{
+				if(buf_size%4 != 0)
+				{
+					Errf("RetrieveSelection failure: Data size is not a multiple of 4");
+					break;
+				}
+
+				u64 unit_size = reply.format/8;
+				buf = Alloc!(u8)(unit_size * (buf_size + nitems));
+
+				MemCpy(buf.ptr + buf_size, xcb_get_property_value(reply), nitems * unit_size);
+				buf_size += nitems * unit_size;
+			}
+
+			bytes_after = reply.bytes_after;
+		}
+	}
+
+	if(buf != null && TryLock(&w.cb_mut))
+	{
+		Selection* sel;
+		foreach(i; CBM.min .. CBM.max)
+		{
+			if(w.selections[i].xmode == ev.property)
+			{
+				sel = &w.selections[i];
+				break;
+			}
+		}
+
+		if(sel != null && sel.target == actual_type)
+		{
+			FreeArray(sel.data);
+			sel.data = buf;
+			buf = [];
+		} 
+		else
+		{
+			Errf("RetrieveSelection failure: mismatched selection actual_type: %s", actual_type);
+		}
+
+		Unlock(&w.cb_mut);
+	}
+	else
+	{
+		FreeArray(buf);
+	}
+}
+
+void
+ClearSelection(PlatformWindow* w, xcb_selection_clear_event_t* ev)
+{
+	if(ev.owner == w.window)
+	{
+		foreach(i; CBM.min .. CBM.max)
+		{
+			Selection* sel = &w.selections[i];
+			if(sel.xmode == ev.selection && TryLock(&w.cb_mut))
+			{
+				FreeArray(sel.data);
+				sel.data = [];
+				sel.owned = false;
+				sel.target = XCB_NONE;
+
+				Unlock(&w.cb_mut);
+
+				break;
+			}
+		}
+	}
+}
+
 void
 HandleEvents(void* window_ptr)
 {
@@ -782,7 +1180,7 @@ HandleEvents(void* window_ptr)
 						break;
 					}
 
-					if(msg.data.data32[0] == w.close_event)
+					if(msg.data.data32[0] == w.atoms[Atoms.DeleteWindow])
 					{
 						w.close = true;
 					}
@@ -878,6 +1276,29 @@ HandleEvents(void* window_ptr)
 						w.h = config_event.height;
 					}
 				} break;
+			case XCB_SELECTION_CLEAR:
+				{
+					ClearSelection(w, cast(xcb_selection_clear_event_t*)e);
+				} break;
+			case XCB_SELECTION_NOTIFY:
+				{
+					RetrieveSelection(w, cast(xcb_selection_notify_event_t*)e);
+				} break;
+			case XCB_SELECTION_REQUEST:
+				{
+					auto req = cast(xcb_selection_request_event_t*)e;
+					xcb_selection_notify_event_t notify = {
+						response_type: XCB_SELECTION_NOTIFY,
+						time: XCB_CURRENT_TIME,
+						requestor: req.requestor,
+						selection: req.selection,
+						target: req.target,
+						property: TransmitSelection(w, req) ? req.property : XCB_NONE,
+					};
+
+					xcb_send_event(w.conn, false, req.requestor, XCB_EVENT_MASK_PROPERTY_CHANGE, cast(char*)&notify);
+					xcb_flush(w.conn);
+				} break;
 			default:
 				break;
 			}

util.d

@@ -6,7 +6,7 @@ import dlib.alloc;
 import xxhash3;
 import includes;
 
-import std.stdio;
+import std.stdio : write, writeln, writefln, stderr;
 import std.conv;
 import std.string;
 import std.traits;
@@ -43,6 +43,7 @@ Logf(Args...)(string fmt, Args args)
 {
 	try
 	{
+		write("[INFO]: ");
 		writefln(fmt, args);
 	}
 	catch (Exception e)
@@ -51,6 +52,20 @@ Logf(Args...)(string fmt, Args args)
 	}
 }
 
+void
+Errf(Args...)(string fmt, Args args)
+{
+	try
+	{
+		stderr.write("[ERROR]: ");
+		stderr.writef(fmt, args, '\n');
+	}
+	catch(Exception e)
+	{
+		assert(false, "Incompatible format type");
+	}
+}
+
 void
 Log(string str)
 {