Fix syntax highlight error in sub-syntaxes due to an incorrect line cache movement on added lines.

Add a new event to track the number of visible lines changes in UICodeEditor.

include/eepp/scene/event.hpp

@@ -116,6 +116,7 @@ class EE_API Event {
 		OnScrollChange,
 		OnModelChanged,
 		OnWindowToFront,
+		OnVisibleLinesCountChange,
 		NoEvent = eeINDEX_NOT_FOUND
 	};
 

include/eepp/ui/doc/documentview.hpp

@@ -155,6 +155,8 @@ class EE_API DocumentView {
 
 	void onFoldRegionsUpdated();
 
+	void setOnVisibleLineCountChange( std::function<void()> onVisibleLinesCountChangeCb );
+
   protected:
 	std::shared_ptr<TextDocument> mDoc;
 	FontStyleConfig mFontStyle;
@@ -168,6 +170,7 @@ class EE_API DocumentView {
 	bool mPendingReconstruction{ false };
 	bool mUnderConstruction{ false };
 	bool mUpdatingFoldRegions{ false };
+	std::function<void()> mOnVisibleLineCountChange;
 
 	void changeVisibility( Int64 fromDocIdx, Int64 toDocIdx, bool visible,
 						   bool recomputeOffset = true, bool recomputeLineToVisibleIndex = true );
@@ -184,6 +187,8 @@ class EE_API DocumentView {
 					   bool recomputeLineToVisibleIndex = true );
 
 	void moveCursorToVisibleArea();
+
+	void onVisibleLinesCountChange();
 };
 
 }}} // namespace EE::UI::Doc

src/eepp/ui/doc/documentview.cpp

@@ -273,6 +273,8 @@ void DocumentView::invalidateCache() {
 
 	mPendingReconstruction = false;
 
+	onVisibleLinesCountChange();
+
 	Log::debug( "DocumentView for \"%s\" generated in %s", mDoc->getFilePath(),
 				clock.getElapsedTime().toString() );
 }
@@ -430,9 +432,12 @@ void DocumentView::setPendingReconstruction( bool pendingReconstruction ) {
 }
 
 void DocumentView::clearCache() {
+	auto visibleLines = mVisibleLines.size();
 	mVisibleLines.clear();
 	mDocLineToVisibleIndex.clear();
 	mVisibleLinesOffset.clear();
+	if ( mDoc && visibleLines != mDoc->linesCount() )
+		onVisibleLinesCountChange();
 }
 
 void DocumentView::clear() {
@@ -487,6 +492,8 @@ void DocumentView::updateCache( Int64 fromLine, Int64 toLine, Int64 numLines ) {
 	Int64 oldIdxFrom = static_cast<Int64>( toVisibleIndex( fromLine, false ) );
 	Int64 oldIdxTo = static_cast<Int64>( toVisibleIndex( toLine, true ) );
 
+	auto visibleLinesCount = mVisibleLines.size();
+
 	// Remove old visible lines
 	mVisibleLines.erase( mVisibleLines.begin() + oldIdxFrom, mVisibleLines.begin() + oldIdxTo + 1 );
 
@@ -535,6 +542,9 @@ void DocumentView::updateCache( Int64 fromLine, Int64 toLine, Int64 numLines ) {
 	recomputeDocLineToVisibleIndex( oldIdxFrom );
 
 	verifyStructuralConsistency();
+
+	if ( visibleLinesCount != mVisibleLines.size() )
+		onVisibleLinesCountChange();
 }
 
 void DocumentView::recomputeDocLineToVisibleIndex( Int64 fromVisibleIndex, bool ensureDocSize ) {
@@ -696,6 +706,8 @@ void DocumentView::changeVisibility( Int64 fromDocIdx, Int64 toDocIdx, bool visi
 
 	if ( recomputeLineToVisibleIndex )
 		eeASSERT( mDocLineToVisibleIndex.size() == mDoc->linesCount() );
+
+	onVisibleLinesCountChange();
 }
 
 bool DocumentView::isFolded( Int64 docIdx, bool andNotFirstLine ) const {
@@ -792,4 +804,14 @@ void DocumentView::verifyStructuralConsistency() {
 #endif
 }
 
+void DocumentView::onVisibleLinesCountChange() {
+	if ( mOnVisibleLineCountChange )
+		mOnVisibleLineCountChange();
+}
+
+void DocumentView::setOnVisibleLineCountChange(
+	std::function<void()> onVisibleLinesCountChangeCb ) {
+	mOnVisibleLineCountChange = std::move( onVisibleLinesCountChangeCb );
+}
+
 }}} // namespace EE::UI::Doc

src/eepp/ui/doc/syntaxhighlighter.cpp

@@ -89,7 +89,8 @@ void SyntaxHighlighter::moveHighlight( const Int64& fromLine, const Int64& /*toL
 		return;
 	Int64 linesCount = mDoc->linesCount();
 	if ( numLines > 0 ) {
-		for ( Int64 i = linesCount - 1; i >= fromLine; --i ) {
+		Int64 toLine = fromLine + numLines;
+		for ( Int64 i = linesCount - 1; i >= toLine; --i ) {
 			auto lineIt = mLines.find( i - numLines );
 			if ( lineIt != mLines.end() ) {
 				const auto& line = lineIt->second;

src/eepp/ui/uicodeeditor.cpp

@@ -138,6 +138,8 @@ UICodeEditor::UICodeEditor( const std::string& elementTag, const bool& autoRegis
 	setTextSelection( true );
 	setColorScheme( SyntaxColorScheme::getDefault() );
 	refreshTag();
+	mDocView.setOnVisibleLineCountChange(
+		[this] { sendCommonEvent( Event::OnVisibleLinesCountChange ); } );
 	mVScrollBar = UIScrollBar::NewVertical();
 	mVScrollBar->setParent( this );
 	mVScrollBar->addEventListener( Event::OnSizeChange,
@@ -2126,8 +2128,6 @@ void UICodeEditor::updateEditor() {
 
 void UICodeEditor::onDocumentTextChanged( const DocumentContentChange& change ) {
 	invalidateDraw();
-	checkMatchingBrackets();
-	sendCommonEvent( Event::OnTextChanged );
 	mDocView.updateCache( change.range.start().line(), change.range.start().line(), 0 );
 
 	if ( !change.text.empty() && !mDocView.isWrapEnabled() ) {
@@ -2141,6 +2141,8 @@ void UICodeEditor::onDocumentTextChanged( const DocumentContentChange& change )
 	}
 
 	findRegionsDelayed();
+	checkMatchingBrackets();
+	sendCommonEvent( Event::OnTextChanged );
 }
 
 void UICodeEditor::onDocumentCursorChange( const Doc::TextPosition& ) {
@@ -2168,6 +2170,9 @@ void UICodeEditor::onDocumentLineCountChange( const size_t& lastCount, const siz
 
 	if ( Math::countDigits( (Int64)lastCount ) != Math::countDigits( (Int64)newCount ) )
 		invalidateLineWrapMaxWidth( false );
+
+	if ( !mDocView.isWrapEnabled() )
+		sendCommonEvent( Event::OnVisibleLinesCountChange );
 }
 
 void UICodeEditor::onDocumentLineChanged( const Int64& lineNumber ) {