Implement X11 primary selection

1 files changed, 68 insertions, 26 deletions

diff --git a/source/Irrlicht/CIrrDeviceLinux.cpp b/source/Irrlicht/CIrrDeviceLinux.cpp
index 3c19099..0efc8f4 100644
--- a/source/Irrlicht/CIrrDeviceLinux.cpp
+++ b/source/Irrlicht/CIrrDeviceLinux.cpp
@@ -1000,12 +1000,15 @@ bool CIrrDeviceLinux::run()
 						send_response(req->property);

 					};

 

-					if (req->selection != X_ATOM_CLIPBOARD ||

+					if ((req->selection != X_ATOM_CLIPBOARD &&

+							req->selection != XA_PRIMARY) ||

 							req->owner != XWindow) {

 						// we are not the owner, refuse request

 						send_response_refuse();

 						break;

 					}

+					const core::stringc &text_buffer = req->selection == X_ATOM_CLIPBOARD ?

+							Clipboard : PrimarySelection;

 

 					// for debugging:

 					//~ {

@@ -1026,8 +1029,8 @@ bool CIrrDeviceLinux::run()
 								req->target, X_ATOM_UTF8_STRING,

 								8, // format = 8-bit

 								PropModeReplace,

-								(unsigned char *)Clipboard.c_str(),

-								Clipboard.size());

+								(unsigned char *)text_buffer.c_str(),

+								text_buffer.size());

 						send_response(req->target);

 						break;

 					}

@@ -1052,8 +1055,8 @@ bool CIrrDeviceLinux::run()
 						set_property_and_notify(

 								X_ATOM_UTF8_STRING,

 								8,

-								Clipboard.c_str(),

-								Clipboard.size()

+								text_buffer.c_str(),

+								text_buffer.size()

 							);

 

 					} else {

@@ -1676,47 +1679,49 @@ void CIrrDeviceLinux::pollJoysticks()
 }

 

 

+#if defined(_IRR_COMPILE_WITH_X11_)

 //! gets text from the clipboard

 //! \return Returns 0 if no string is in there, otherwise utf-8 text.

-const c8 *CIrrDeviceLinux::getTextFromClipboard() const

+const c8 *CIrrDeviceLinux::getTextFromSelection(Atom selection, core::stringc &text_buffer) const

 {

-#if defined(_IRR_COMPILE_WITH_X11_)

-	Window ownerWindow = XGetSelectionOwner(XDisplay, X_ATOM_CLIPBOARD);

+	Window ownerWindow = XGetSelectionOwner(XDisplay, selection);

 	if (ownerWindow == XWindow) {

-		return Clipboard.c_str();

+		return text_buffer.c_str();

 	}

 

-	Clipboard = "";

+	text_buffer = "";

 

 	if (ownerWindow == None) {

-		return Clipboard.c_str();

+		return text_buffer.c_str();

 	}

 

 	// delete the property to be set beforehand

 	XDeleteProperty(XDisplay, XWindow, XA_PRIMARY);

 

-	XConvertSelection(XDisplay, X_ATOM_CLIPBOARD, X_ATOM_UTF8_STRING, XA_PRIMARY,

+	XConvertSelection(XDisplay, selection, X_ATOM_UTF8_STRING, XA_PRIMARY,

 			XWindow, CurrentTime);

 	XFlush(XDisplay);

 

 	// wait for event via a blocking call

 	XEvent event_ret;

+	std::pair<Window, Atom> args(XWindow, selection);

 	XIfEvent(XDisplay, &event_ret, [](Display *_display, XEvent *event, XPointer arg) {

+		auto p = reinterpret_cast<std::pair<Window, Atom> *>(arg);

 		return (Bool) (event->type == SelectionNotify &&

-				event->xselection.requestor == *(Window *)arg &&

-				event->xselection.selection == X_ATOM_CLIPBOARD &&

+				event->xselection.requestor == p->first &&

+				event->xselection.selection == p->second &&

 				event->xselection.target == X_ATOM_UTF8_STRING);

-	}, (XPointer)&XWindow);

+	}, (XPointer)&args);

 

 	_IRR_DEBUG_BREAK_IF(!(event_ret.type == SelectionNotify &&

 			event_ret.xselection.requestor == XWindow &&

-			event_ret.xselection.selection == X_ATOM_CLIPBOARD &&

+			event_ret.xselection.selection == selection &&

 			event_ret.xselection.target == X_ATOM_UTF8_STRING));

 

 	Atom property_set = event_ret.xselection.property;

 	if (event_ret.xselection.property == None) {

 		// request failed => empty string

-		return Clipboard.c_str();

+		return text_buffer.c_str();

 	}

 

 	// check for data

@@ -1743,15 +1748,15 @@ const c8 *CIrrDeviceLinux::getTextFromClipboard() const
 	// for debugging:

 	//~ {

 		//~ char *type_name = XGetAtomName(XDisplay, type);

-		//~ fprintf(stderr, "CIrrDeviceLinux::getTextFromClipboard: actual type: %s (=%ld)\n",

+		//~ fprintf(stderr, "CIrrDeviceLinux::getTextFromSelection: actual type: %s (=%ld)\n",

 				//~ type_name, type);

 		//~ XFree(type_name);

 	//~ }

 

 	if (type != X_ATOM_UTF8_STRING && type != X_ATOM_UTF8_MIME_TYPE) {

-		os::Printer::log("CIrrDeviceLinux::getTextFromClipboard: did not get utf-8 string",

+		os::Printer::log("CIrrDeviceLinux::getTextFromSelection: did not get utf-8 string",

 				ELL_WARNING);

-		return Clipboard.c_str();

+		return text_buffer.c_str();

 	}

 

 	if (bytesLeft > 0) {

@@ -1760,20 +1765,49 @@ const c8 *CIrrDeviceLinux::getTextFromClipboard() const
 									bytesLeft, 0, AnyPropertyType, &type, &format,

 									&numItems, &dummy, &data);

 		if (result == Success)

-			Clipboard = (irr::c8 *)data;

+			text_buffer = (irr::c8 *)data;

 		XFree (data);

 	}

 

 	// delete the property again, to inform the owner about the successful transfer

 	XDeleteProperty(XDisplay, XWindow, property_set);

 

-	return Clipboard.c_str();

+	return text_buffer.c_str();

+}

+#endif

 

+//! gets text from the clipboard

+//! \return Returns 0 if no string is in there, otherwise utf-8 text.

+const c8 *CIrrDeviceLinux::getTextFromClipboard() const

+{

+#if defined(_IRR_COMPILE_WITH_X11_)

+	return getTextFromSelection(X_ATOM_CLIPBOARD, Clipboard);

 #else

 	return nullptr;

 #endif

 }

 

+//! gets text from the primary selection

+//! \return Returns 0 if no string is in there, otherwise utf-8 text.

+const c8 *CIrrDeviceLinux::getTextFromPrimarySelection() const

+{

+#if defined(_IRR_COMPILE_WITH_X11_)

+	return getTextFromSelection(XA_PRIMARY, PrimarySelection);

+#else

+	return nullptr;

+#endif

+}

+

+#if defined(_IRR_COMPILE_WITH_X11_)

+bool CIrrDeviceLinux::becomeSelectionOwner(Atom selection) const

+{

+	XSetSelectionOwner (XDisplay, selection, XWindow, CurrentTime);

+	XFlush (XDisplay);

+	Window owner = XGetSelectionOwner(XDisplay, selection);

+	return owner == XWindow;

+}

+#endif

+

 //! copies text to the clipboard

 void CIrrDeviceLinux::copyToClipboard(const c8 *text) const

 {

@@ -1781,15 +1815,23 @@ void CIrrDeviceLinux::copyToClipboard(const c8 *text) const
 	// Actually there is no clipboard on X but applications just say they own the clipboard and return text when asked.

 	// Which btw. also means that on X you lose clipboard content when closing applications.

 	Clipboard = text;

-	XSetSelectionOwner (XDisplay, X_ATOM_CLIPBOARD, XWindow, CurrentTime);

-	XFlush (XDisplay);

-	Window owner = XGetSelectionOwner(XDisplay, X_ATOM_CLIPBOARD);

-	if (owner != XWindow) {

+	if (!becomeSelectionOwner(X_ATOM_CLIPBOARD)) {

 		os::Printer::log("CIrrDeviceLinux::copyToClipboard: failed to set owner", ELL_WARNING);

 	}

 #endif

 }

 

+//! copies text to the primary selection

+void CIrrDeviceLinux::copyToPrimarySelection(const c8 *text) const

+{

+#if defined(_IRR_COMPILE_WITH_X11_)

+	PrimarySelection = text;

+	if (!becomeSelectionOwner(XA_PRIMARY)) {

+		os::Printer::log("CIrrDeviceLinux::copyToPrimarySelection: failed to set owner", ELL_WARNING);

+	}

+#endif

+}

+

 #ifdef _IRR_COMPILE_WITH_X11_

 // return true if the passed event has the type passed in parameter arg

 Bool PredicateIsEventType(Display *display, XEvent *event, XPointer arg)