X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Fmathed%2FInsetMathScript.cpp;h=315637c2dadcf1edfebf1e3f3a55abdf276b48ac;hb=f6282dfec7c7d53fd92d7270f8806a39a9c5d75b;hp=b5e70fd6313a8eb2600135f16200c01f22ccb2c6;hpb=ce8929e9b237af569934b434154d199634363268;p=lyx.git

diff --git a/src/mathed/InsetMathScript.cpp b/src/mathed/InsetMathScript.cpp
index b5e70fd631..315637c2da 100644
--- a/src/mathed/InsetMathScript.cpp
+++ b/src/mathed/InsetMathScript.cpp
@@ -226,7 +226,8 @@ int InsetMathScript::dx0(BufferView const & bv) const
 {
 	LASSERT(hasDown(), return 0);
 	Dimension const dim = dimension(bv);
-	return hasLimits() ? (dim.wid - down().dimension(bv).width()) / 2 : nwid(bv);
+	return hasLimits() ? (dim.wid - down().dimension(bv).width()) / 2
+		: nwid(bv) + min(nker(&bv), 0);
 }
 
 
@@ -234,7 +235,8 @@ int InsetMathScript::dx1(BufferView const & bv) const
 {
 	LASSERT(hasUp(), return 0);
 	Dimension const dim = dimension(bv);
-	return hasLimits() ? (dim.wid - up().dimension(bv).width()) / 2 : nwid(bv) + nker(&bv);
+	return hasLimits() ? (dim.wid - up().dimension(bv).width()) / 2
+		: nwid(bv) + max(nker(&bv), 0);
 }
 
 
@@ -265,10 +267,8 @@ int InsetMathScript::ndes(BufferView const & bv) const
 
 int InsetMathScript::nker(BufferView const * bv) const
 {
-	if (!nuc().empty()) {
-		int kerning = nuc().kerning(bv);
-		return kerning > 0 ? kerning : 0;
-	}
+	if (!nuc().empty())
+		return nuc().kerning(bv);
 	return 0;
 }
 
@@ -320,9 +320,9 @@ void InsetMathScript::metrics(MetricsInfo & mi, Dimension & dim) const
 			dim.wid = max(dim.wid, dimdown.width());
 	} else {
 		if (hasUp())
-			dim.wid = max(dim.wid, nker(mi.base.bv) + dimup.width());
+			dim.wid = max(dim.wid, max(nker(mi.base.bv), 0) + dimup.width());
 		if (hasDown())
-			dim.wid = max(dim.wid, dimdown.width());
+			dim.wid = max(dim.wid, min(nker(mi.base.bv), 0) + dimdown.width());
 		dim.wid += nwid(bv);
 	}
 	int na = nasc(bv);
@@ -381,6 +381,20 @@ void InsetMathScript::drawT(TextPainter & pain, int x, int y) const
 }
 
 
+// FIXME: See InsetMathSymbol::takesLimits, which seems to attempt the
+// same in a hardcoded way. takeLimits use is currently commented out in
+// InsetMathScript::metrics. It seems that the mathop test is general
+// enough, but only time will tell.
+bool InsetMathScript::allowsLimits() const
+{
+	if (nuc().empty())
+		return false;
+	// Only makes sense for insets of mathop class
+	if (nuc().back()->mathClass() != MC_OP)
+		return false;
+	return true;
+}
+
 
 bool InsetMathScript::hasLimits() const
 {
@@ -391,8 +405,9 @@ bool InsetMathScript::hasLimits() const
 		return false;
 
 	// we can only display limits if the nucleus wants some
-	if (nuc().empty())
+	if (!allowsLimits())
 		return false;
+	// FIXME: this is some hardcoding done in InsetMathSymbol::metrics.
 	if (!nuc().back()->isScriptable())
 		return false;
 
@@ -632,8 +647,8 @@ void InsetMathScript::mathmlize(MathStream & os) const
 		os << "<mrow />";
 
 	if (u && d)
-		os << MTag("mrow") << down() << ETag("mrow") 
-		   << MTag("mrow") << up() << ETag("mrow") 
+		os << MTag("mrow") << down() << ETag("mrow")
+		   << MTag("mrow") << up() << ETag("mrow")
 		   << ETag(l ? "munderover" : "msubsup");
 	else if (u)
 		os << MTag("mrow") << up() << ETag("mrow") << ETag(l ? "mover" : "msup");
@@ -751,6 +766,9 @@ void InsetMathScript::doDispatch(Cursor & cur, FuncRequest & cmd)
 	//LYXERR("InsetMathScript: request: " << cmd);
 
 	if (cmd.action() == LFUN_MATH_LIMITS) {
+		// only when nucleus allows this
+		if (!allowsLimits())
+			return;
 		cur.recordUndoInset();
 		if (!cmd.argument().empty()) {
 			if (cmd.argument() == "limits")
@@ -774,15 +792,19 @@ bool InsetMathScript::getStatus(Cursor & cur, FuncRequest const & cmd,
 				FuncStatus & flag) const
 {
 	if (cmd.action() == LFUN_MATH_LIMITS) {
-		if (!cmd.argument().empty()) {
-			if (cmd.argument() == "limits")
-				flag.setOnOff(limits_ == 1);
-			else if (cmd.argument() == "nolimits")
-				flag.setOnOff(limits_ == -1);
-			else
-				flag.setOnOff(limits_ == 0);
-		} 
-		flag.setEnabled(true);
+		// only when nucleus allows this
+		if (allowsLimits()) {
+			if (!cmd.argument().empty()) {
+				if (cmd.argument() == "limits")
+					flag.setOnOff(limits_ == 1);
+				else if (cmd.argument() == "nolimits")
+					flag.setOnOff(limits_ == -1);
+				else
+					flag.setOnOff(limits_ == 0);
+			}
+			flag.setEnabled(true);
+		} else
+			flag.setEnabled(false);
 		return true;
 	}