Improve 200MB+ files loading/editing performance

While loading files over more 200MB, they are all considered as Normal text files, that improve loading speed (for example for huge XML or SQL file).
Also, the feature as braces match, smart highlightingg, tag match and URL colorization are disabled for not penalizing the editing performance.

PowerEditor/src/Notepad_plus.cpp

@@ -2567,6 +2567,10 @@ void Notepad_plus::findMatchingBracePos(intptr_t& braceAtCaret, intptr_t& braceO
 // return true if 1 or 2 (matched) brace(s) is found
 bool Notepad_plus::braceMatch()
 {
+	Buffer* currentBuf = _pEditView->getCurrentBuffer();
+	if (!currentBuf->isLargeFile())
+		return false;
+
 	intptr_t braceAtCaret = -1;
 	intptr_t braceOpposite = -1;
 	findMatchingBracePos(braceAtCaret, braceOpposite);
@@ -2977,6 +2981,10 @@ bool isUrl(TCHAR * text, int textLen, int start, int* segmentLen)
 
 void Notepad_plus::addHotSpot(ScintillaEditView* view)
 {
+	Buffer* currentBuf = _pEditView->getCurrentBuffer();
+	if (!currentBuf->isLargeFile())
+		return;
+
 	ScintillaEditView* pView = view ? view : _pEditView;
 
 	int urlAction = (NppParameters::getInstance()).getNppGUI()._styleURL;

PowerEditor/src/NppNotification.cpp

@@ -867,9 +867,10 @@ BOOL Notepad_plus::notify(SCNotification *notification)
 			if (nppParam._isFindReplacing)
 				break;
 
-			if (notification->nmhdr.hwndFrom != _pEditView->getHSelf()) // notification come from unfocus view - both views ae visible
+			Buffer* currentBuf = _pEditView->getCurrentBuffer();
+
+			if (notification->nmhdr.hwndFrom != _pEditView->getHSelf() && !currentBuf->isLargeFile()) // notification come from unfocus view - both views ae visible
 			{
-				//ScintillaEditView * unfocusView = isFromPrimary ? &_subEditView : &_mainEditView;
 				if (nppGui._smartHiliteOnAnotherView)
 				{
 					TCHAR selectedText[1024];
@@ -881,13 +882,13 @@ BOOL Notepad_plus::notify(SCNotification *notification)
 
 			braceMatch();
 
-			if (nppGui._enableTagsMatchHilite)
+			if (nppGui._enableTagsMatchHilite && !currentBuf->isLargeFile())
 			{
 				XmlMatchedTagsHighlighter xmlTagMatchHiliter(_pEditView);
 				xmlTagMatchHiliter.tagMatch(nppGui._enableTagAttrsHilite);
 			}
 
-			if (nppGui._enableSmartHilite)
+			if (nppGui._enableSmartHilite && !currentBuf->isLargeFile())
 			{
 				if (nppGui._disableSmartHiliteTmp)
 					nppGui._disableSmartHiliteTmp = false;

PowerEditor/src/ScintillaComponent/Buffer.cpp

@@ -62,9 +62,9 @@ namespace // anonymous
 } // anonymous namespace
 
 
-Buffer::Buffer(FileManager * pManager, BufferID id, Document doc, DocFileStatus type, const TCHAR *fileName)
+Buffer::Buffer(FileManager * pManager, BufferID id, Document doc, DocFileStatus type, const TCHAR *fileName, bool isLargeFile)
 	// type must be either DOC_REGULAR or DOC_UNNAMED
-	: _pManager(pManager) , _id(id), _doc(doc), _lang(L_TEXT)
+	: _pManager(pManager) , _id(id), _doc(doc), _lang(L_TEXT), _isLargeFile(isLargeFile)
 {
 	NppParameters& nppParamInst = NppParameters::getInstance();
 	const NewDocDefaultSettings& ndds = (nppParamInst.getNppGUI()).getNewDocDefaultSettings();
@@ -82,9 +82,7 @@ Buffer::Buffer(FileManager * pManager, BufferID id, Document doc, DocFileStatus
 	checkFileState();
 
 	// reset after initialization
-	_isDirty   = false;
 	_canNotify = true;
-	_needLexer = false; // new buffers do not need lexing, Scintilla takes care of that
 }
 
 
@@ -228,14 +226,21 @@ void Buffer::setFileName(const TCHAR *fn, LangType defaultLang)
 
 	updateTimeStamp();
 
+	BufferStatusInfo lang2Change = BufferChangeNone;
 	if (!_hasLangBeenSetFromMenu && (newLang != _lang || _lang == L_USER))
 	{
-		_lang = newLang;
-		doNotify(BufferChangeFilename | BufferChangeLanguage | BufferChangeTimestamp);
-		return;
+		if (_isLargeFile)
+		{
+			_lang = L_TEXT;
+		}
+		else
+		{
+			_lang = newLang;
+			lang2Change = BufferChangeLanguage;
+		}
 	}
 
-	doNotify(BufferChangeFilename | BufferChangeTimestamp);
+	doNotify(BufferChangeFilename | BufferChangeTimestamp | lang2Change);
 }
 
 
@@ -711,7 +716,7 @@ BufferID FileManager::loadFile(const TCHAR* filename, Document doc, int encoding
 
 	if (res)
 	{
-		Buffer* newBuf = new Buffer(this, _nextBufferID, doc, DOC_REGULAR, fullpath);
+		Buffer* newBuf = new Buffer(this, _nextBufferID, doc, DOC_REGULAR, fullpath, isLargeFile);
 		BufferID id = static_cast<BufferID>(newBuf);
 		newBuf->_id = id;
 
@@ -727,8 +732,6 @@ BufferID FileManager::loadFile(const TCHAR* filename, Document doc, int encoding
 		if (res != 0) // res == 1 or res == -1
 			newBuf->_timeStamp = fileNameTimestamp;
 
-		newBuf->_isLargeFile = isLargeFile;
-
 		_buffers.push_back(newBuf);
 		++_nbBufs;
 		Buffer* buf = _buffers.at(_nbBufs - 1);
@@ -737,7 +740,7 @@ BufferID FileManager::loadFile(const TCHAR* filename, Document doc, int encoding
 		buf->setEncoding(-1);
 
 		// if no file extension, and the language has been detected,  we use the detected value
-		if ((buf->getLangType() == L_TEXT) && (loadedFileFormat._language != L_TEXT))
+		if (!newBuf->_isLargeFile && ((buf->getLangType() == L_TEXT) && (loadedFileFormat._language != L_TEXT)))
 			buf->setLangType(loadedFileFormat._language);
 
 		setLoadedBufferEncodingAndEol(buf, UnicodeConvertor, loadedFileFormat._encoding, loadedFileFormat._eolFormat);
@@ -1249,7 +1252,7 @@ BufferID FileManager::newEmptyDocument()
 	newTitle += nb;
 
 	Document doc = (Document)_pscratchTilla->execute(SCI_CREATEDOCUMENT);	//this already sets a reference for filemanager
-	Buffer* newBuf = new Buffer(this, _nextBufferID, doc, DOC_UNNAMED, newTitle.c_str());
+	Buffer* newBuf = new Buffer(this, _nextBufferID, doc, DOC_UNNAMED, newTitle.c_str(), false);
 	BufferID id = static_cast<BufferID>(newBuf);
 	newBuf->_id = id;
 	_buffers.push_back(newBuf);
@@ -1267,7 +1270,7 @@ BufferID FileManager::bufferFromDocument(Document doc, bool dontIncrease, bool d
 
 	if (!dontRef)
 		_pscratchTilla->execute(SCI_ADDREFDOCUMENT, 0, doc);	//set reference for FileManager
-	Buffer* newBuf = new Buffer(this, _nextBufferID, doc, DOC_UNNAMED, newTitle.c_str());
+	Buffer* newBuf = new Buffer(this, _nextBufferID, doc, DOC_UNNAMED, newTitle.c_str(), false);
 	BufferID id = static_cast<BufferID>(newBuf);
 	newBuf->_id = id;
 	_buffers.push_back(newBuf);

PowerEditor/src/ScintillaComponent/Buffer.h

@@ -37,6 +37,7 @@ enum DocFileStatus {
 };
 
 enum BufferStatusInfo {
+	BufferChangeNone		= 0x000,  // Nothing to change
 	BufferChangeLanguage	= 0x001,  // Language was altered
 	BufferChangeDirty		= 0x002,  // Buffer has changed dirty state
 	BufferChangeFormat		= 0x004,  // EOL type was changed
@@ -150,7 +151,7 @@ public:
 	//Load the document into Scintilla/add to TabBar
 	//The entire lifetime if the buffer, the Document has reference count of _atleast_ one
 	//Destructor makes sure its purged
-	Buffer(FileManager * pManager, BufferID id, Document doc, DocFileStatus type, const TCHAR *fileName);
+	Buffer(FileManager * pManager, BufferID id, Document doc, DocFileStatus type, const TCHAR *fileName, bool isLargeFile);
 
 	// this method 1. copies the file name
 	//             2. determinates the language from the ext of file name