#fix #280, (Tailing very large .txt files doesn't work) @harriv please re-test

Author: janwilmans

DebugView++/LogView.cpp

@@ -449,7 +449,7 @@ void CLogView::OnLButtonDown(UINT flags, CPoint point)
 
 	int x0 = GetSubItemRect(info.iItem, info.iSubItem, LVIR_BOUNDS).left + GetHeader().GetBitmapMargin();
 	auto line = TabsToSpaces(GetItemWText(info.iItem, ColumnToSubItem(Column::Message)));
-	auto pos = 0;
+	size_t pos = 0;
 	int min = 1000 * 1000;
 	bool found = false;
 	for (;;)

DebugView++/version.h

@@ -1,2 +1,2 @@
-#define VERSION 1,7,0,90 
-#define VERSION_STR "1.7.0.90" 
+#define VERSION 1,7,0,93 
+#define VERSION_STR "1.7.0.93" 

DebugView++Lib/BinaryFileReader.cpp

@@ -92,7 +92,7 @@ void BinaryFileReader::ReadUntilEof()
 	int i = 0;
 	while (std::getline(m_wifstream, line))
 	{
-		if ((++i % 100) == 0) m_update();
+		if ((++i % 1500) == 0) m_update();
 		AddLine(Str(line));
 	}
 	m_update();

DebugView++Lib/FileReader.cpp

@@ -48,6 +48,11 @@ void FileReader::Initialize()
 	}
 }
 
+boost::signals2::connection FileReader::SubscribeToUpdate(UpdateSignal::slot_type slot)
+{
+    return m_update.connect(slot);
+}
+
 bool FileReader::AtEnd() const
 {
 	return m_end;
@@ -73,19 +78,22 @@ void FileReader::Notify()
 void FileReader::ReadUntilEof()
 {
 	std::string line;
+    int count = 0;
 	while (std::getline(m_ifstream, line))
 	{
+        m_line += line;
+        if ((++count % 1500) == 0) m_update();
 		if (m_ifstream.eof())
 		{
-			// the line ended without a newline character, store the line particle
-			m_line += line;
+			// the line ended without a newline character
 		}
 		else
 		{
-			SafeAddLine(m_line + line);
+			SafeAddLine(m_line);
 			m_line.clear();
 		}
 	}
+    m_update();
 
 	if (m_ifstream.eof()) 
 	{

DebugView++Lib/LogSources.cpp

@@ -362,6 +362,7 @@ AnyFileReader* LogSources::AddAnyFileReader(const std::wstring& filename, bool k
 	}
 
 	auto pAnyFileReader = std::make_unique<AnyFileReader>(m_timer, m_linebuffer, filetype, filename, keeptailing);
+    pAnyFileReader->SubscribeToUpdate([&]() { m_throttledUpdate(); });
 	auto pResult = pAnyFileReader.get();
 	Add(std::move(pAnyFileReader));
 	return pResult;

include/DebugView++Lib/FileReader.h

@@ -1,6 +1,6 @@
 // (C) Copyright Gert-Jan de Vos and Jan Wilmans 2013.
 // Distributed under the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE_1_0.txt or copy at 
+// (See accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)
 
 // Repository at: https://github.com/djeedjay/DebugViewPP/
@@ -11,6 +11,7 @@
 #include "FileIO.h"
 #include "Win32/Win32Lib.h"
 #include "DebugView++Lib/LogSource.h"
+#include <boost/signals2.hpp>
 
 namespace fusion {
 namespace debugviewpp {
@@ -24,7 +25,10 @@ class FileReader : public LogSource
 	~FileReader() override;
 
 	void Initialize() override;
-	bool AtEnd() const override;
+    typedef boost::signals2::signal<void()> UpdateSignal;
+    boost::signals2::connection SubscribeToUpdate(UpdateSignal::slot_type slot);
+    
+    bool AtEnd() const override;
 	HANDLE GetHandle() const override;
 	void Notify() override;
 	void PreProcess(Line& line) const override;
@@ -36,6 +40,7 @@ class FileReader : public LogSource
 	FileType::type m_fileType;
 
 private:
+
 	void SafeAddLine(const std::string& line);
 	void ReadUntilEof();
 
@@ -46,7 +51,8 @@ class FileReader : public LogSource
 	bool m_initialized;
 	std::string m_line;
 	bool m_keeptailing;
+	UpdateSignal m_update;
 };
 
-} // namespace debugviewpp 
+} // namespace debugviewpp
 } // namespace fusion