Backport: Add style metadata methods with null implementations.

Backport based on changesets 6345:faecbd0078e5 and 6346:72bd27f81477.

4 files changed, 95 insertions, 5 deletions

diff --git a/lexlib/DefaultLexer.cxx b/lexlib/DefaultLexer.cxx
index 9babbf7a4..4089273f7 100644
--- a/lexlib/DefaultLexer.cxx
+++ b/lexlib/DefaultLexer.cxx
@@ -37,7 +37,7 @@ void SCI_METHOD DefaultLexer::Release() {
 }
 
 int SCI_METHOD DefaultLexer::Version() const {
-	return lvOriginal;
+	return lvMetaData;
 }
 
 const char * SCI_METHOD DefaultLexer::PropertyNames() {
@@ -108,3 +108,19 @@ int SCI_METHOD DefaultLexer::DistanceToSecondaryStyles() {
 const char * SCI_METHOD DefaultLexer::GetSubStyleBases() {
 	return styleSubable;
 }
+
+int SCI_METHOD DefaultLexer::NamedStyles() {
+	return 0;
+}
+
+const char * SCI_METHOD DefaultLexer::NameOfStyle(int) {
+	return "";
+}
+
+const char * SCI_METHOD DefaultLexer::TagsOfStyle(int) {
+	return "";
+}
+
+const char * SCI_METHOD DefaultLexer::DescriptionOfStyle(int) {
+	return "";
+}
diff --git a/lexlib/DefaultLexer.h b/lexlib/DefaultLexer.h
index 7b1490138..0e62a6320 100644
--- a/lexlib/DefaultLexer.h
+++ b/lexlib/DefaultLexer.h
@@ -1,6 +1,6 @@
 // Scintilla source code edit control
 /** @file DefaultLexer.h
- ** A lexer base class with default empty implementations of methods. 
+ ** A lexer base class with default empty implementations of methods.
  ** For lexers that do not support all features so do not need real implementations.
  ** Does have real implementation for style metadata.
  **/
@@ -15,7 +15,7 @@ namespace Scintilla {
 #endif
 
 // A simple lexer with no state
-class DefaultLexer : public ILexerWithSubStyles {
+class DefaultLexer : public ILexerWithMetaData {
 public:
 	DefaultLexer();
 	virtual ~DefaultLexer();
@@ -40,6 +40,10 @@ public:
 	void SCI_METHOD SetIdentifiers(int style, const char *identifiers) override;
 	int SCI_METHOD DistanceToSecondaryStyles() override;
 	const char * SCI_METHOD GetSubStyleBases() override;
+	int SCI_METHOD NamedStyles() override;
+	const char * SCI_METHOD NameOfStyle(int style) override;
+	const char * SCI_METHOD TagsOfStyle(int style) override;
+	const char * SCI_METHOD DescriptionOfStyle(int style) override;
 };
 
 #ifdef SCI_NAMESPACE
diff --git a/lexlib/LexerBase.cxx b/lexlib/LexerBase.cxx
index 71e2601dc..5ebbe0958 100644
--- a/lexlib/LexerBase.cxx
+++ b/lexlib/LexerBase.cxx
@@ -24,6 +24,8 @@
 using namespace Scintilla;
 #endif
 
+static const char styleSubable[] = { 0 };
+
 LexerBase::LexerBase() {
 	for (int wl = 0; wl < numWordLists; wl++)
 		keyWordLists[wl] = new WordList;
@@ -43,7 +45,7 @@ void SCI_METHOD LexerBase::Release() {
 }
 
 int SCI_METHOD LexerBase::Version() const {
-	return lvOriginal;
+	return lvMetaData;
 }
 
 const char * SCI_METHOD LexerBase::PropertyNames() {
@@ -85,5 +87,59 @@ Sci_Position SCI_METHOD LexerBase::WordListSet(int n, const char *wl) {
 }
 
 void * SCI_METHOD LexerBase::PrivateCall(int, void *) {
+	return nullptr;
+}
+
+int SCI_METHOD LexerBase::LineEndTypesSupported() {
+	return SC_LINE_END_TYPE_DEFAULT;
+}
+
+int SCI_METHOD LexerBase::AllocateSubStyles(int, int) {
+	return -1;
+}
+
+int SCI_METHOD LexerBase::SubStylesStart(int) {
+	return -1;
+}
+
+int SCI_METHOD LexerBase::SubStylesLength(int) {
+	return 0;
+}
+
+int SCI_METHOD LexerBase::StyleFromSubStyle(int subStyle) {
+	return subStyle;
+}
+
+int SCI_METHOD LexerBase::PrimaryStyleFromStyle(int style) {
+	return style;
+}
+
+void SCI_METHOD LexerBase::FreeSubStyles() {
+}
+
+void SCI_METHOD LexerBase::SetIdentifiers(int, const char *) {
+}
+
+int SCI_METHOD LexerBase::DistanceToSecondaryStyles() {
+	return 0;
+}
+
+const char * SCI_METHOD LexerBase::GetSubStyleBases() {
+	return styleSubable;
+}
+
+int SCI_METHOD LexerBase::NamedStyles() {
 	return 0;
 }
+
+const char * SCI_METHOD LexerBase::NameOfStyle(int) {
+	return "";
+}
+
+const char * SCI_METHOD LexerBase::TagsOfStyle(int) {
+	return "";
+}
+
+const char * SCI_METHOD LexerBase::DescriptionOfStyle(int) {
+	return "";
+}
diff --git a/lexlib/LexerBase.h b/lexlib/LexerBase.h
index ddc561c5c..f320633ef 100644
--- a/lexlib/LexerBase.h
+++ b/lexlib/LexerBase.h
@@ -13,7 +13,7 @@ namespace Scintilla {
 #endif
 
 // A simple lexer with no state
-class LexerBase : public ILexer {
+class LexerBase : public ILexerWithMetaData {
 protected:
 	PropSetSimple props;
 	enum {numWordLists=KEYWORDSET_MAX+1};
@@ -32,6 +32,20 @@ public:
 	void SCI_METHOD Lex(Sci_PositionU startPos, Sci_Position lengthDoc, int initStyle, IDocument *pAccess) override = 0;
 	void SCI_METHOD Fold(Sci_PositionU startPos, Sci_Position lengthDoc, int initStyle, IDocument *pAccess) override = 0;
 	void * SCI_METHOD PrivateCall(int operation, void *pointer) override;
+	int SCI_METHOD LineEndTypesSupported() override;
+	int SCI_METHOD AllocateSubStyles(int styleBase, int numberStyles) override;
+	int SCI_METHOD SubStylesStart(int styleBase) override;
+	int SCI_METHOD SubStylesLength(int styleBase) override;
+	int SCI_METHOD StyleFromSubStyle(int subStyle) override;
+	int SCI_METHOD PrimaryStyleFromStyle(int style) override;
+	void SCI_METHOD FreeSubStyles() override;
+	void SCI_METHOD SetIdentifiers(int style, const char *identifiers) override;
+	int SCI_METHOD DistanceToSecondaryStyles() override;
+	const char * SCI_METHOD GetSubStyleBases() override;
+	int SCI_METHOD NamedStyles() override;
+	const char * SCI_METHOD NameOfStyle(int style) override;
+	const char * SCI_METHOD TagsOfStyle(int style) override;
+	const char * SCI_METHOD DescriptionOfStyle(int style) override;
 };
 
 #ifdef SCI_NAMESPACE