Let LFUN_PASTE always paste the most recent clipboard (internal or system)

* src/insets/insettabular.C
	(InsetTabular::doDispatch): Only paste the tabular clipboard if the
	system clipboard is not newer, else let the current cell paste the
	system clipboard
	(InsetTabular::getStatus): Only decide whether to enable LFUN_PASTE
	if the tabular clipboard is not empty and the system clipboard is
	not newer, else let the current cell decide.

	* src/mathed/InsetMathGrid.C
	(InsetMathGrid::doDispatch): Use the system clipboard for LFUN_PASTE
	if it is newer.

	* src/mathed/InsetMathNest.C
	(InsetMathNest::doDispatch): Use the system clipboard for LFUN_PASTE
	if it is newer.

	* src/text3.C
	(doInsertInset): Add a "0" argument to LFUN_PASTE, because we always
	want to use the internal clipboard here
	(LyXText::dispatch): ditto (when handling mouse button 2 press)
	(LyXText::dispatch): Use the system clipboard for LFUN_PASTE if it
	is newer.
	(LyXText::getStatus): Also enable LFUN_PASTE if the system clipboard
	is owned by another application


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@16498 a592a061-630c-0410-9148-cb99ea01b6c8

src/insets/insettabular.C

@@ -723,7 +723,7 @@ void InsetTabular::doDispatch(LCursor & cur, FuncRequest & cmd)
 	}
 
 	case LFUN_PASTE:
-		if (tabularStackDirty()) {
+		if (tabularStackDirty() && theClipboard().isInternal()) {
 			recordUndoInset(cur, Undo::INSERT);
 			pasteSelection(cur);
 			break;
@@ -1033,7 +1033,7 @@ bool InsetTabular::getStatus(LCursor & cur, FuncRequest const & cmd,
 	}
 
 	case LFUN_PASTE:
-		if (tabularStackDirty()) {
+		if (tabularStackDirty() && theClipboard().isInternal()) {
 			status.enabled(true);
 			return true;
 		} else

src/mathed/InsetMathGrid.C

@@ -25,6 +25,7 @@
 #include "gettext.h"
 #include "undo.h"
 
+#include "frontends/Clipboard.h"
 #include "frontends/Painter.h"
 
 #include "insets/mailinset.h"
@@ -1210,11 +1211,19 @@ void InsetMathGrid::doDispatch(LCursor & cur, FuncRequest & cmd)
 	case LFUN_PASTE: {
 		cur.message(_("Paste"));
 		cap::replaceSelection(cur);
-		istringstream is(to_utf8(cmd.argument()));
-		int n = 0;
-		is >> n;
+		docstring topaste;
+		if (cmd.argument().empty() && !theClipboard().isInternal())
+			topaste = theClipboard().get();
+		else {
+			idocstringstream is(cmd.argument());
+			int n = 0;
+			is >> n;
+			topaste = cap::getSelection(cur.buffer(), n);
+		}
 		InsetMathGrid grid(1, 1);
-		mathed_parse_normal(grid, cap::getSelection(cur.buffer(), n));
+		if (!topaste.empty())
+			mathed_parse_normal(grid, topaste);
+
 		if (grid.nargs() == 1) {
 			// single cell/part of cell
 			recordUndo(cur);

src/mathed/InsetMathNest.C

@@ -50,6 +50,7 @@
 
 #include "support/lstrings.h"
 
+#include "frontends/Clipboard.h"
 #include "frontends/Painter.h"
 #include "frontends/Selection.h"
 
@@ -437,11 +438,16 @@ void InsetMathNest::doDispatch(LCursor & cur, FuncRequest & cmd)
 		recordUndo(cur);
 		cur.message(_("Paste"));
 		replaceSelection(cur);
-		size_t n = 0;
-		istringstream is(to_utf8(cmd.argument()));
-		is >> n;
-		docstring const selection = cap::getSelection(cur.buffer(), n);
-		cur.niceInsert(selection);
+		docstring topaste;
+		if (cmd.argument().empty() && !theClipboard().isInternal())
+			topaste = theClipboard().get();
+		else {
+			size_t n = 0;
+			idocstringstream is(cmd.argument());
+			is >> n;
+			topaste = cap::getSelection(cur.buffer(), n);
+		}
+		cur.niceInsert(topaste);
 		cur.clearSelection(); // bug 393
 		cur.bv().switchKeyMap();
 		finishUndo();

src/text3.C

@@ -267,7 +267,7 @@ bool doInsertInset(LCursor & cur, LyXText * text,
 		inset->edit(cur, true);
 
 	if (gotsel && pastesel) {
-		lyx::dispatch(FuncRequest(LFUN_PASTE));
+		lyx::dispatch(FuncRequest(LFUN_PASTE, "0"));
 		// reset first par to default
 		if (cur.lastpit() != 0 || cur.lastpos() != 0) {
 			LyXLayout_ptr const layout =
@@ -756,13 +756,16 @@ void LyXText::dispatch(LCursor & cur, FuncRequest & cmd)
 	case LFUN_PASTE:
 		cur.message(_("Paste"));
 		cap::replaceSelection(cur);
-		if (isStrUnsignedInt(to_utf8(cmd.argument())))
+		if (cmd.argument().empty() && !theClipboard().isInternal())
+			pasteString(cur, theClipboard().get(), docstring());
+		else {
+			string const arg(to_utf8(cmd.argument()));
 			pasteSelection(cur, bv->buffer()->errorList("Paste"),
-			convert<unsigned int>(to_utf8(cmd.argument())));
-		else
-			pasteSelection(cur, bv->buffer()->errorList("Paste"),
-			0);
-		bv->buffer()->errors("Paste");
+					isStrUnsignedInt(arg) ?
+						convert<unsigned int>(arg) :
+						0);
+			bv->buffer()->errors("Paste");
+		}
 		cur.clearSelection(); // bug 393
 		bv->switchKeyMap();
 		finishUndo();
@@ -968,7 +971,7 @@ void LyXText::dispatch(LCursor & cur, FuncRequest & cmd)
 		// insert this
 		if (cmd.button() == mouse_button::button2) {
 			if (paste_internally)
-				lyx::dispatch(FuncRequest(LFUN_PASTE));
+				lyx::dispatch(FuncRequest(LFUN_PASTE, "0"));
 			else
 				lyx::dispatch(FuncRequest(LFUN_PRIMARY_SELECTION_PASTE, "paragraph"));
 		}
@@ -1721,7 +1724,23 @@ bool LyXText::getStatus(LCursor & cur, FuncRequest const & cmd,
 		break;
 
 	case LFUN_PASTE:
-		enable = cap::numberOfSelections() > 0;
+		// FIXME: This is not correct, but the correct code below is
+		// expensive
+		enable = cap::numberOfSelections() > 0 ||
+			!theClipboard().isInternal();
+#if 0
+		if (cmd.argument().empty()) {
+			if (theClipboard().isInternal())
+				enable = cap::numberOfSelections() > 0;
+			else
+				enable = !theClipboard().get().empty();
+		} else if (isStrUnsignedInt(to_utf8(cmd.argument()))) {
+			int n = convert<unsigned int>(to_utf8(cmd.argument()));
+			enable = cap::numberOfSelections() > n;
+		} else
+			// unknown argument
+			enable = false;
+#endif
 		break;
 
 	case LFUN_PARAGRAPH_MOVE_UP: