// SciTE - Scintilla based Text Editor
/** @file SciTEIO.cxx
 ** Manage input and output with the system.
 **/
// Copyright 1998-2010 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

#include <stdlib.h>
// Older versions of GNU stdint.h require this definition to be able to see INT32_MAX
#define __STDC_LIMIT_MACROS
#include <stdint.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <stddef.h>
#include <fcntl.h>
#include <time.h>

#include <string>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <memory>

#include "Scintilla.h"
#include "ILexer.h"

#include "GUI.h"

#include "StringList.h"
#include "StringHelpers.h"
#include "FilePath.h"
#include "StyleDefinition.h"
#include "PropSetFile.h"
#include "StyleWriter.h"
#include "Extender.h"
#include "SciTE.h"
#include "Mutex.h"
#include "JobQueue.h"
#include "Cookie.h"
#include "Worker.h"
#include "FileWorker.h"
#include "MatchMarker.h"
#include "SciTEBase.h"
#include "Utf8_16.h"

#if defined(GTK)
const GUI::gui_char propUserFileName[] = GUI_TEXT(".SciTEUser.properties");
#elif defined(__APPLE__)
const GUI::gui_char propUserFileName[] = GUI_TEXT("SciTEUser.properties");
#else
// Windows
const GUI::gui_char propUserFileName[] = GUI_TEXT("SciTEUser.properties");
#endif
const GUI::gui_char propGlobalFileName[] = GUI_TEXT("SciTEGlobal.properties");
const GUI::gui_char propAbbrevFileName[] = GUI_TEXT("abbrev.properties");

void SciTEBase::SetFileName(const FilePath &openName, bool fixCase) {
	if (openName.AsInternal()[0] == '\"') {
		// openName is surrounded by double quotes
		GUI::gui_string pathCopy = openName.AsInternal();
		pathCopy = pathCopy.substr(1, pathCopy.size() - 2);
		filePath.Set(pathCopy);
	} else {
		filePath.Set(openName);
	}

	// Break fullPath into directory and file name using working directory for relative paths
	if (!filePath.IsAbsolute()) {
		// Relative path. Since we ran AbsolutePath, we probably are here because fullPath is empty.
		filePath.SetDirectory(filePath.Directory());
	}

	if (fixCase) {
		filePath.FixName();
	}

	ReadLocalPropFile();

	props.Set("FilePath", filePath.AsUTF8().c_str());
	props.Set("FileDir", filePath.Directory().AsUTF8().c_str());
	props.Set("FileName", filePath.BaseName().AsUTF8().c_str());
	props.Set("FileExt", filePath.Extension().AsUTF8().c_str());
	props.Set("FileNameExt", FileNameExt().AsUTF8().c_str());

	SetWindowName();
	if (buffers.buffers.size() > 0)
		buffers.buffers[buffers.Current()].Set(filePath);
}

// See if path exists.
// If path is not absolute, it is combined with dir.
// If resultPath is not NULL, it receives the absolute path if it exists.
bool SciTEBase::Exists(const GUI::gui_char *dir, const GUI::gui_char *path, FilePath *resultPath) {
	FilePath copy(path);
	if (!copy.IsAbsolute() && dir) {
		copy.SetDirectory(dir);
	}
	if (!copy.Exists())
		return false;
	if (resultPath) {
		resultPath->Set(copy.AbsolutePath());
	}
	return true;
}

void SciTEBase::CountLineEnds(int &linesCR, int &linesLF, int &linesCRLF) {
	linesCR = 0;
	linesLF = 0;
	linesCRLF = 0;
	const int lengthDoc = LengthDocument();
	char chPrev = ' ';
	TextReader acc(wEditor);
	char chNext = acc.SafeGetCharAt(0);
	for (int i = 0; i < lengthDoc; i++) {
		const char ch = chNext;
		chNext = acc.SafeGetCharAt(i + 1);
		if (ch == '\r') {
			if (chNext == '\n')
				linesCRLF++;
			else
				linesCR++;
		} else if (ch == '\n') {
			if (chPrev != '\r') {
				linesLF++;
			}
		} else if (i > 1000000) {
			return;
		}
		chPrev = ch;
	}
}

void SciTEBase::DiscoverEOLSetting() {
	SetEol();
	if (props.GetInt("eol.auto")) {
		int linesCR;
		int linesLF;
		int linesCRLF;
		CountLineEnds(linesCR, linesLF, linesCRLF);
		if (((linesLF >= linesCR) && (linesLF > linesCRLF)) || ((linesLF > linesCR) && (linesLF >= linesCRLF)))
			wEditor.Call(SCI_SETEOLMODE, SC_EOL_LF);
		else if (((linesCR >= linesLF) && (linesCR > linesCRLF)) || ((linesCR > linesLF) && (linesCR >= linesCRLF)))
			wEditor.Call(SCI_SETEOLMODE, SC_EOL_CR);
		else if (((linesCRLF >= linesLF) && (linesCRLF > linesCR)) || ((linesCRLF > linesLF) && (linesCRLF >= linesCR)))
			wEditor.Call(SCI_SETEOLMODE, SC_EOL_CRLF);
	}
}

// Look inside the first line for a #! clue regarding the language
std::string SciTEBase::DiscoverLanguage() {
	int length = Minimum(LengthDocument(), 64 * 1024);
	std::string buf = GetRangeString(wEditor, 0, length);
	std::string languageOverride = "";
	std::string l1 = ExtractLine(buf.c_str(), length);
	if (StartsWith(l1, "<?xml")) {
		languageOverride = "xml";
	} else if (StartsWith(l1, "#!")) {
		l1 = l1.substr(2);
		std::replace(l1.begin(), l1.end(), '\\', ' ');
		std::replace(l1.begin(), l1.end(), '/', ' ');
		std::replace(l1.begin(), l1.end(), '\t', ' ');
		Substitute(l1, "  ", " ");
		Substitute(l1, "  ", " ");
		Substitute(l1, "  ", " ");
		::Remove(l1, std::string("\r"));
		::Remove(l1, std::string("\n"));
		if (StartsWith(l1, " ")) {
			l1 = l1.substr(1);
		}
		std::replace(l1.begin(), l1.end(), ' ', '\0');
		l1.append(1, '\0');
		const char *word = l1.c_str();
		while (*word) {
			std::string propShBang("shbang.");
			propShBang.append(word);
			std::string langShBang = props.GetExpandedString(propShBang.c_str());
			if (langShBang.length()) {
				languageOverride = langShBang;
			}
			word += strlen(word) + 1;
		}
	}
	if (languageOverride.length()) {
		languageOverride.insert(0, "x.");
	}
	return languageOverride;
}

void SciTEBase::DiscoverIndentSetting() {
	const int lengthDoc = std::min(LengthDocument(), 1000000);
	TextReader acc(wEditor);
	bool newline = true;
	int indent = 0; // current line indentation
	int tabSizes[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 }; // number of lines with corresponding indentation (index 0 - tab)
	int prevIndent = 0; // previous line indentation
	int prevTabSize = -1; // previous line tab size
	for (int i = 0; i < lengthDoc; i++) {
		const char ch = acc[i];
		if (ch == '\r' || ch == '\n') {
			indent = 0;
			newline = true;
		} else if (newline && ch == ' ') {
			indent++;
		} else if (newline) {
			if (indent) {
				if (indent == prevIndent && prevTabSize != -1) {
					tabSizes[prevTabSize]++;
				} else if (indent > prevIndent && prevIndent != -1) {
					if (indent - prevIndent <= 8) {
						prevTabSize = indent - prevIndent;
						tabSizes[prevTabSize]++;
					} else {
						prevTabSize = -1;
					}
				}
				prevIndent = indent;
			} else if (ch == '\t') {
				tabSizes[0]++;
				prevIndent = -1;
			} else {
				prevIndent = 0;
			}
			newline = false;
		}
	}
	// maximum non-zero indent
	int topTabSize = -1;
	for (int j = 0; j <= 8; j++) {
		if (tabSizes[j] && (topTabSize == -1 || tabSizes[j] > tabSizes[topTabSize])) {
			topTabSize = j;
		}
	}
	// set indentation
	if (topTabSize == 0) {
		wEditor.Call(SCI_SETUSETABS, 1);
	} else if (topTabSize != -1) {
		wEditor.Call(SCI_SETUSETABS, 0);
		wEditor.Call(SCI_SETINDENT, topTabSize);
	}
}

void SciTEBase::OpenCurrentFile(long long fileSize, bool suppressMessage, bool asynchronous) {
	if (CurrentBuffer()->pFileWorker) {
		// Already performing an asynchronous load or save so do not restart load
		if (!suppressMessage) {
			GUI::gui_string msg = LocaliseMessage("Could not open file '^0'.", filePath.AsInternal());
			WindowMessageBox(wSciTE, msg);
		}
		return;
	}

	FILE *fp = filePath.Open(fileRead);
	if (!fp) {
		if (!suppressMessage) {
			GUI::gui_string msg = LocaliseMessage("Could not open file '^0'.", filePath.AsInternal());
			WindowMessageBox(wSciTE, msg);
		}
		if (!wEditor.Call(SCI_GETUNDOCOLLECTION)) {
			wEditor.Call(SCI_SETUNDOCOLLECTION, 1);
		}
		return;
	}

	CurrentBuffer()->SetTimeFromFile();

	wEditor.Call(SCI_BEGINUNDOACTION);	// Group together clear and insert
	wEditor.Call(SCI_CLEARALL);

	CurrentBuffer()->lifeState = Buffer::reading;
	if (asynchronous) {
		// Turn grey while loading
		wEditor.Call(SCI_STYLESETBACK, STYLE_DEFAULT, 0xEEEEEE);
		wEditor.Call(SCI_SETREADONLY, 1);
		assert(CurrentBufferConst()->pFileWorker == NULL);
		ILoader *pdocLoad;
		try {
			pdocLoad = reinterpret_cast<ILoader *>(wEditor.CallReturnPointer(SCI_CREATELOADER, static_cast<uptr_t>(fileSize) + 1000));
		} catch (...) {
			wEditor.Call(SCI_SETSTATUS, 0);
			return;
		}
		CurrentBuffer()->pFileWorker = new FileLoader(this, pdocLoad, filePath, static_cast<size_t>(fileSize), fp);
		CurrentBuffer()->pFileWorker->sleepTime = props.GetInt("asynchronous.sleep");
		PerformOnNewThread(CurrentBuffer()->pFileWorker);
	} else {
		wEditor.Call(SCI_ALLOCATE, static_cast<uptr_t>(fileSize) + 1000);

		Utf8_16_Read convert;
		std::vector<char> data(blockSize);
		size_t lenFile = fread(&data[0], 1, data.size(), fp);
		const UniMode umCodingCookie = CodingCookieValue(&data[0], lenFile);
		while (lenFile > 0) {
			lenFile = convert.convert(&data[0], lenFile);
			char *dataBlock = convert.getNewBuf();
			wEditor.CallString(SCI_ADDTEXT, lenFile, dataBlock);
			lenFile = fread(&data[0], 1, data.size(), fp);
			if (lenFile == 0) {
				// Handle case where convert is holding a lead surrogate but no more data
				size_t lenFileTrail = convert.convert(NULL, lenFile);
				if (lenFileTrail) {
					char *dataTrail = convert.getNewBuf();
					wEditor.CallString(SCI_ADDTEXT, lenFileTrail, dataTrail);
				}
			}
		}
		fclose(fp);
		wEditor.Call(SCI_ENDUNDOACTION);

		CurrentBuffer()->unicodeMode = static_cast<UniMode>(
			    static_cast<int>(convert.getEncoding()));
		// Check the first two lines for coding cookies
		if (CurrentBuffer()->unicodeMode == uni8Bit) {
			CurrentBuffer()->unicodeMode = umCodingCookie;
		}

		CompleteOpen(ocSynchronous);
	}
}

void SciTEBase::TextRead(FileWorker *pFileWorker) {
	FileLoader *pFileLoader = static_cast<FileLoader *>(pFileWorker);
	int iBuffer = buffers.GetDocumentByWorker(pFileLoader);
	// May not be found if load cancelled
	if (iBuffer >= 0) {
		buffers.buffers[iBuffer].unicodeMode = pFileLoader->unicodeMode;
		buffers.buffers[iBuffer].lifeState = Buffer::readAll;
		if (pFileLoader->err) {
			GUI::gui_string msg = LocaliseMessage("Could not open file '^0'.", pFileLoader->path.AsInternal());
			WindowMessageBox(wSciTE, msg);
			// Should refuse to save when failure occurs
			buffers.buffers[iBuffer].lifeState = Buffer::empty;
		}
		// Switch documents
		sptr_t pdocLoading = reinterpret_cast<sptr_t>(pFileLoader->pLoader->ConvertToDocument());
		pFileLoader->pLoader = 0;
		SwitchDocumentAt(iBuffer, pdocLoading);
		if (iBuffer == buffers.Current()) {
			CompleteOpen(ocCompleteCurrent);
			if (extender)
				extender->OnOpen(buffers.buffers[iBuffer].AsUTF8().c_str());
			RestoreState(buffers.buffers[iBuffer], true);
			DisplayAround(buffers.buffers[iBuffer]);
			wEditor.Call(SCI_SCROLLCARET);
		}
	}
}

void SciTEBase::PerformDeferredTasks() {
	if (buffers.buffers[buffers.Current()].futureDo & Buffer::fdFinishSave) {
		wEditor.Call(SCI_SETSAVEPOINT);
		wEditor.Call(SCI_SETREADONLY, CurrentBuffer()->isReadOnly);
		buffers.FinishedFuture(buffers.Current(), Buffer::fdFinishSave);
	}
}

void SciTEBase::CompleteOpen(OpenCompletion oc) {
	wEditor.Call(SCI_SETREADONLY, CurrentBuffer()->isReadOnly);

	if (oc != ocSynchronous) {
		ReadProperties();
	}

	if (language == "") {
		std::string languageOverride = DiscoverLanguage();
		if (languageOverride.length()) {
			CurrentBuffer()->overrideExtension = languageOverride;
			CurrentBuffer()->lifeState = Buffer::open;
			ReadProperties();
			SetIndentSettings();
		}
	}

	if (oc != ocSynchronous) {
		SetIndentSettings();
		SetEol();
		UpdateBuffersCurrent();
		SizeSubWindows();
	}

	if (CurrentBuffer()->unicodeMode != uni8Bit) {
		// Override the code page if Unicode
		codePage = SC_CP_UTF8;
	} else {
		codePage = props.GetInt("code.page");
	}
	wEditor.Call(SCI_SETCODEPAGE, codePage);

	DiscoverEOLSetting();

	if (props.GetInt("indent.auto")) {
		DiscoverIndentSetting();
	}

	if (!wEditor.Call(SCI_GETUNDOCOLLECTION)) {
		wEditor.Call(SCI_SETUNDOCOLLECTION, 1);
	}
	wEditor.Call(SCI_SETSAVEPOINT);
	if (props.GetInt("fold.on.open") > 0) {
		FoldAll();
	}
	wEditor.Call(SCI_GOTOPOS, 0);

	CurrentBuffer()->CompleteLoading();

	Redraw();
}

void SciTEBase::TextWritten(FileWorker *pFileWorker) {
	FileStorer *pFileStorer = static_cast<FileStorer *>(pFileWorker);
	int iBuffer = buffers.GetDocumentByWorker(pFileStorer);

	FilePath pathSaved = pFileStorer->path;
	const int errSaved = pFileStorer->err;
	const bool cancelledSaved = pFileStorer->Cancelling();

	// May not be found if save cancelled or buffer closed
	if (iBuffer >= 0) {
		// Complete and release
		buffers.buffers[iBuffer].CompleteStoring();
		if (errSaved || cancelledSaved) {
			// Background save failed (possibly out-of-space) so resurrect the
			// buffer so can be saved to another disk or retried after making room.
			buffers.SetVisible(iBuffer, true);
			SetBuffersMenu();
			if (iBuffer == buffers.Current()) {
				wEditor.Call(SCI_SETREADONLY, CurrentBuffer()->isReadOnly);
			}
		} else {
			if (!buffers.GetVisible(iBuffer)) {
				buffers.RemoveInvisible(iBuffer);
			}
			if (iBuffer == buffers.Current()) {
				wEditor.Call(SCI_SETREADONLY, CurrentBuffer()->isReadOnly);
				if (pathSaved.SameNameAs(CurrentBuffer()->AsInternal())) {
					wEditor.Call(SCI_SETSAVEPOINT);
				}
				if (extender)
					extender->OnSave(buffers.buffers[iBuffer].AsUTF8().c_str());
			} else {
				buffers.buffers[iBuffer].isDirty = false;
				buffers.buffers[iBuffer].failedSave = false;
				// Need to make writable and set save point when next receive focus.
				buffers.AddFuture(iBuffer, Buffer::fdFinishSave);
				SetBuffersMenu();
			}
		}
	} else {
		GUI::gui_string msg = LocaliseMessage("Could not find buffer '^0'.", pathSaved.AsInternal());
		WindowMessageBox(wSciTE, msg);
	}

	if (errSaved) {
		FailedSaveMessageBox(pathSaved);
	}

	if (IsPropertiesFile(pathSaved)) {
		ReloadProperties();
	}
	UpdateStatusBar(true);
	if (!jobQueue.executing && (jobQueue.HasCommandToRun())) {
		Execute();
	}
	if (quitting && !buffers.SavingInBackground()) {
		QuitProgram();
	}
}

void SciTEBase::UpdateProgress(Worker *) {
	GUI::gui_string prog;
	BackgroundActivities bgActivities = buffers.CountBackgroundActivities();
	const int countBoth = bgActivities.loaders + bgActivities.storers;
	if (countBoth == 0) {
		// Should hide UI
		ShowBackgroundProgress(GUI_TEXT(""), 0, 0);
	} else {
		if (countBoth == 1) {
			prog += LocaliseMessage(bgActivities.loaders ? "Opening '^0'" : "Saving '^0'",
				bgActivities.fileNameLast.c_str());
		} else {
			if (bgActivities.loaders) {
				prog += LocaliseMessage("Opening ^0 files ", GUI::StringFromInteger(bgActivities.loaders).c_str());
			}
			if (bgActivities.storers) {
				prog += LocaliseMessage("Saving ^0 files ", GUI::StringFromInteger(bgActivities.storers).c_str());
			}
		}
		ShowBackgroundProgress(prog, bgActivities.totalWork, bgActivities.totalProgress);
	}
}

bool SciTEBase::PreOpenCheck(const GUI::gui_char *) {
	return false;
}

bool SciTEBase::Open(const FilePath &file, OpenFlags of) {
	InitialiseBuffers();

	FilePath absPath = file.AbsolutePath();
	if (!absPath.IsUntitled() && absPath.IsDirectory()) {
		GUI::gui_string msg = LocaliseMessage("Path '^0' is a directory so can not be opened.",
			absPath.AsInternal());
		WindowMessageBox(wSciTE, msg);
		return false;
	}

	int index = buffers.GetDocumentByName(absPath);
	if (index >= 0) {
		buffers.SetVisible(index, true);
		SetDocumentAt(index);
		RemoveFileFromStack(absPath);
		DeleteFileStackMenu();
		SetFileStackMenu();
		// If not forcing reload or currently busy with load or save, just rotate into view
		if ((!(of & ofForceLoad)) || (CurrentBufferConst()->pFileWorker))
			return true;
	}
	// See if we can have a buffer for the file to open
	if (!CanMakeRoom(!(of & ofNoSaveIfDirty))) {
		return false;
	}

	const long long fileSize = absPath.IsUntitled() ? 0 : absPath.GetFileLength();
	if (fileSize > INT32_MAX) {
		const GUI::gui_string sSize = GUI::StringFromLongLong(fileSize);
		const GUI::gui_string msg = LocaliseMessage("File '^0' is ^1 bytes long, "
			"larger than 2GB which is the largest SciTE can open.",
			absPath.AsInternal(), sSize.c_str());
		WindowMessageBox(wSciTE, msg, mbsIconWarning);
		return false;
	}
	if (fileSize > 0) {
		// Real file, not empty buffer
		const long long maxSize = props.GetLongLong("max.file.size", 2000000000LL);
		if (maxSize > 0 && fileSize > maxSize) {
			const GUI::gui_string sSize = GUI::StringFromLongLong(fileSize);
			const GUI::gui_string sMaxSize = GUI::StringFromLongLong(maxSize);
			const GUI::gui_string msg = LocaliseMessage("File '^0' is ^1 bytes long,\n"
			        "larger than the ^2 bytes limit set in the properties.\n"
			        "Do you still want to open it?",
			        absPath.AsInternal(), sSize.c_str(), sMaxSize.c_str());
			const MessageBoxChoice answer = WindowMessageBox(wSciTE, msg, mbsYesNo | mbsIconWarning);
			if (answer != mbYes) {
				return false;
			}
		}
	}

	if (buffers.size() == buffers.length) {
		AddFileToStack(filePath, GetSelectedRange(), GetCurrentScrollPosition());
		ClearDocument();
		CurrentBuffer()->lifeState = Buffer::open;
		if (extender)
			extender->InitBuffer(buffers.Current());
	} else {
		if (index < 0 || !(of & ofForceLoad)) { // No new buffer, already opened
			New();
		}
	}

	assert(CurrentBufferConst()->pFileWorker == NULL);
	SetFileName(absPath);

	propsDiscovered.Clear();
	std::string discoveryScript = props.GetExpandedString("command.discover.properties");
	if (discoveryScript.length()) {
		std::string propertiesText = CommandExecute(GUI::StringFromUTF8(discoveryScript).c_str(),
			absPath.Directory().AsInternal());
		if (propertiesText.size()) {
			propsDiscovered.ReadFromMemory(propertiesText.c_str(), propertiesText.size(), absPath.Directory(), filter, NULL, 0);
		}
	}
	CurrentBuffer()->props = propsDiscovered;
	CurrentBuffer()->overrideExtension = "";
	ReadProperties();
	SetIndentSettings();
	SetEol();
	UpdateBuffersCurrent();
	SizeSubWindows();
	SetBuffersMenu();

	bool asynchronous = false;
	if (!filePath.IsUntitled()) {
		wEditor.Call(SCI_SETREADONLY, 0);
		wEditor.Call(SCI_CANCEL);
		if (of & ofPreserveUndo) {
			wEditor.Call(SCI_BEGINUNDOACTION);
		} else {
			wEditor.Call(SCI_SETUNDOCOLLECTION, 0);
		}

		asynchronous = (fileSize > props.GetInt("background.open.size", -1)) &&
			!(of & (ofPreserveUndo|ofSynchronous));
		OpenCurrentFile(fileSize, of & ofQuiet, asynchronous);

		if (of & ofPreserveUndo) {
			wEditor.Call(SCI_ENDUNDOACTION);
		} else {
			wEditor.Call(SCI_EMPTYUNDOBUFFER);
		}
		CurrentBuffer()->isReadOnly = props.GetInt("read.only");
		wEditor.Call(SCI_SETREADONLY, CurrentBuffer()->isReadOnly);
	}
	RemoveFileFromStack(filePath);
	DeleteFileStackMenu();
	SetFileStackMenu();
	SetWindowName();
	if (lineNumbers && lineNumbersExpand)
		SetLineNumberWidth();
	UpdateStatusBar(true);
	if (extender && !asynchronous)
		extender->OnOpen(filePath.AsUTF8().c_str());
	return true;
}

// Returns true if editor should get the focus
bool SciTEBase::OpenSelected() {
	std::string selName = SelectionFilename();
	if (selName.length() == 0) {
		WarnUser(warnWrongFile);
		return false;	// No selection
	}

#if !defined(GTK)
	if (StartsWith(selName, "http:") ||
		StartsWith(selName, "https:") ||
		StartsWith(selName, "ftp:") ||
		StartsWith(selName, "ftps:") ||
		StartsWith(selName, "news:") ||
		StartsWith(selName, "mailto:")) {
		std::string cmd = selName;
		AddCommand(cmd, "", jobShell);
		return false;	// Job is done
	}
#endif

	if (StartsWith(selName, "file://")) {
		selName.erase(0, 7);
		if (selName[0] == '/' && selName[2] == ':') { // file:///C:/filename.ext
			selName.erase(0, 1);
		}
	}

	std::string fileNameForExtension = ExtensionFileName();
	std::string openSuffix = props.GetNewExpandString("open.suffix.", fileNameForExtension.c_str());
	selName += openSuffix;

	if (EqualCaseInsensitive(selName.c_str(), FileNameExt().AsUTF8().c_str()) || EqualCaseInsensitive(selName.c_str(), filePath.AsUTF8().c_str())) {
		WarnUser(warnWrongFile);
		return true;	// Do not open if it is the current file!
	}

	std::string cTag;
	unsigned long lineNumber = 0;
	if (IsPropertiesFile(filePath) &&
	        (selName.find('.') == std::string::npos)) {
		// We are in a properties file and try to open a file without extension,
		// we suppose we want to open an imported .properties file
		// So we append the correct extension to open the included file.
		// Maybe we should check if the filename is preceded by "import"...
		selName += PROPERTIES_EXTENSION;
	} else {
		// Check if we have a line number (error message or grep result)
		// A bit of duplicate work with DecodeMessage, but we don't know
		// here the format of the line, so we do guess work.
		// Can't do much for space separated line numbers anyway...
		size_t endPath = selName.find("(");
		if (endPath != std::string::npos) {	// Visual Studio error message: F:\scite\src\SciTEBase.h(312):	bool Exists(
			lineNumber = atol(selName.c_str() + endPath + 1);
		} else {
			endPath = selName.find(":", 2);	// Skip Windows' drive separator
			if (endPath != std::string::npos) {	// grep -n line, perhaps gcc too: F:\scite\src\SciTEBase.h:312:	bool Exists(
				lineNumber = atol(selName.c_str() + endPath + 1);
			}
		}
		if (lineNumber > 0) {
			selName.erase(endPath);
		}

		// Support the ctags format

		if (lineNumber == 0) {
			cTag = GetCTag();
		}
	}

	FilePath path;
	// Don't load the path of the current file if the selected
	// filename is an absolute pathname
	GUI::gui_string selFN = GUI::StringFromUTF8(selName);
	if (!FilePath(selFN).IsAbsolute()) {
		path = filePath.Directory();
		// If not there, look in openpath
		if (!Exists(path.AsInternal(), selFN.c_str(), NULL)) {
			GUI::gui_string openPath = GUI::StringFromUTF8(props.GetNewExpandString(
			            "openpath.", fileNameForExtension.c_str()));
			while (openPath.length()) {
				GUI::gui_string tryPath(openPath);
				size_t sepIndex = tryPath.find(listSepString);
				if ((sepIndex != GUI::gui_string::npos) && (sepIndex != 0)) {
					tryPath.erase(sepIndex);
					openPath.erase(0, sepIndex + 1);
				} else {
					openPath.erase();
				}
				if (Exists(tryPath.c_str(), selFN.c_str(), NULL)) {
					path.Set(tryPath.c_str());
					break;
				}
			}
		}
	}
	FilePath pathReturned;
	if (Exists(path.AsInternal(), selFN.c_str(), &pathReturned)) {
		// Open synchronously if want to seek line number or search tag
		OpenFlags of = ((lineNumber > 0) || (cTag.length() != 0)) ? ofSynchronous : ofNone;
		if (Open(pathReturned, of)) {
			if (lineNumber > 0) {
				wEditor.Call(SCI_GOTOLINE, lineNumber - 1);
			} else if (cTag.length() != 0) {
				if (atoi(cTag.c_str()) > 0) {
					wEditor.Call(SCI_GOTOLINE, atoi(cTag.c_str()) - 1);
				} else {
					findWhat = cTag;
					FindNext(false);
				}
			}
			return true;
		}
	} else {
		WarnUser(warnWrongFile);
	}
	return false;
}

void SciTEBase::Revert() {
	if (filePath.IsUntitled()) {
		wEditor.Call(SCI_CLEARALL);
	} else {
		RecentFile rf = GetFilePosition();
		OpenCurrentFile(filePath.GetFileLength(), false, false);
		DisplayAround(rf);
	}
}

void SciTEBase::CheckReload() {
	if (props.GetInt("load.on.activate")) {
		// Make a copy of fullPath as otherwise it gets aliased in Open
		time_t newModTime = filePath.ModifiedTime();
		if ((newModTime != 0) && (newModTime != CurrentBuffer()->fileModTime)) {
			RecentFile rf = GetFilePosition();
			OpenFlags of = props.GetInt("reload.preserves.undo") ? ofPreserveUndo : ofNone;
			if (CurrentBuffer()->isDirty || props.GetInt("are.you.sure.on.reload") != 0) {
				if ((0 == dialogsOnScreen) && (newModTime != CurrentBuffer()->fileModLastAsk)) {
					GUI::gui_string msg;
					if (CurrentBuffer()->isDirty) {
						msg = LocaliseMessage(
						          "The file '^0' has been modified. Should it be reloaded?",
						          filePath.AsInternal());
					} else {
						msg = LocaliseMessage(
						          "The file '^0' has been modified outside SciTE. Should it be reloaded?",
						          FileNameExt().AsInternal());
					}
					const MessageBoxChoice decision = WindowMessageBox(wSciTE, msg, mbsYesNo | mbsIconQuestion);
					if (decision == mbYes) {
						Open(filePath, static_cast<OpenFlags>(of | ofForceLoad));
						DisplayAround(rf);
					}
					CurrentBuffer()->fileModLastAsk = newModTime;
				}
			} else {
				Open(filePath, static_cast<OpenFlags>(of | ofForceLoad));
				DisplayAround(rf);
			}
		}  else if (newModTime == 0 && CurrentBuffer()->fileModTime != 0)  {
			// Check if the file is deleted
			CurrentBuffer()->fileModTime = 0;
			CurrentBuffer()->fileModLastAsk = 0;
			CurrentBuffer()->isDirty = true;
			CheckMenus();
			SetWindowName();
			SetBuffersMenu();
			GUI::gui_string msg = LocaliseMessage(
						      "The file '^0' has been deleted.",
						      filePath.AsInternal());
			WindowMessageBox(wSciTE, msg, mbsOK);
		}
	}
}

void SciTEBase::Activate(bool activeApp) {
	if (activeApp) {
		CheckReload();
	} else {
		if (props.GetInt("save.on.deactivate")) {
			SaveTitledBuffers();
		}
	}
}

FilePath SciTEBase::SaveName(const char *ext) const {
	GUI::gui_string savePath = filePath.AsInternal();
	if (ext) {
		int dot = static_cast<int>(savePath.length() - 1);
		while ((dot >= 0) && (savePath[dot] != '.')) {
			dot--;
		}
		if (dot >= 0) {
			const int keepExt = props.GetInt("export.keep.ext");
			if (keepExt == 0) {
				savePath.erase(dot);
			} else if (keepExt == 2) {
				savePath[dot] = '_';
			}
		}
		savePath += GUI::StringFromUTF8(ext);
	}
	//~ fprintf(stderr, "SaveName <%s> <%s> <%s>\n", filePath.AsInternal(), savePath.c_str(), ext);
	return FilePath(savePath.c_str());
}

SciTEBase::SaveResult SciTEBase::SaveIfUnsure(bool forceQuestion, SaveFlags sf) {
	CurrentBuffer()->failedSave = false;
	if (CurrentBuffer()->pFileWorker) {
		if (CurrentBuffer()->pFileWorker->IsLoading())
			// In semi-loaded state so refuse to save
			return saveCancelled;
		else
			return saveCompleted;
	}
	if ((CurrentBuffer()->isDirty) && (LengthDocument() || !filePath.IsUntitled() || forceQuestion)) {
		if (props.GetInt("are.you.sure", 1) ||
		        filePath.IsUntitled() ||
		        forceQuestion) {
					GUI::gui_string msg;
			if (!filePath.IsUntitled()) {
				msg = LocaliseMessage("Save changes to '^0'?", filePath.AsInternal());
			} else {
				msg = LocaliseMessage("Save changes to (Untitled)?");
			}
			const MessageBoxChoice decision = WindowMessageBox(wSciTE, msg, mbsYesNoCancel | mbsIconQuestion);
			if (decision == mbYes) {
				if (!Save(sf))
					return saveCancelled;
			}
			return (decision == mbCancel) ? saveCancelled : saveCompleted;
		} else {
			if (!Save(sf))
				return saveCancelled;
		}
	}
	return saveCompleted;
}

SciTEBase::SaveResult SciTEBase::SaveIfUnsureAll() {
	if (SaveAllBuffers(false) == saveCancelled) {
		return saveCancelled;
	}
	if (props.GetInt("save.recent")) {
		for (int i = 0; i < buffers.lengthVisible; ++i) {
			Buffer buff = buffers.buffers[i];
			AddFileToStack(buff, buff.selection, buff.scrollPosition);
		}
	}
	if (props.GetInt("save.session") || props.GetInt("save.position") || props.GetInt("save.recent")) {
		SaveSessionFile(GUI_TEXT(""));
	}

	if (extender && extender->NeedsOnClose()) {
		// Ensure extender is told about each buffer closing
		for (int k = 0; k < buffers.lengthVisible; k++) {
			SetDocumentAt(k);
			extender->OnClose(filePath.AsUTF8().c_str());
		}
	}

	// Definitely going to exit now, so delete all documents
	// Set editor back to initial document
	if (buffers.lengthVisible > 0) {
		wEditor.Call(SCI_SETDOCPOINTER, 0, buffers.buffers[0].doc);
	}
	// Release all the extra documents
	for (int j = 0; j < buffers.size(); j++) {
		if (buffers.buffers[j].doc && !buffers.buffers[j].pFileWorker) {
			wEditor.Call(SCI_RELEASEDOCUMENT, 0, buffers.buffers[j].doc);
			buffers.buffers[j].doc = 0;
		}
	}
	// Initial document will be deleted when editor deleted
	return saveCompleted;
}

SciTEBase::SaveResult SciTEBase::SaveIfUnsureForBuilt() {
	if (props.GetInt("save.all.for.build")) {
		return SaveAllBuffers(!props.GetInt("are.you.sure.for.build"));
	}
	if (CurrentBuffer()->isDirty) {
		if (props.GetInt("are.you.sure.for.build"))
			return SaveIfUnsure(true);

		Save();
	}
	return saveCompleted;
}

void SciTEBase::StripTrailingSpaces() {
	const int maxLines = wEditor.Call(SCI_GETLINECOUNT);
	for (int line = 0; line < maxLines; line++) {
		const int lineStart = wEditor.Call(SCI_POSITIONFROMLINE, line);
		int lineEnd = wEditor.Call(SCI_GETLINEENDPOSITION, line);
		int i = lineEnd - 1;
		char ch = static_cast<char>(wEditor.Call(SCI_GETCHARAT, i));
		while ((i >= lineStart) && ((ch == ' ') || (ch == '\t'))) {
			i--;
			ch = static_cast<char>(wEditor.Call(SCI_GETCHARAT, i));
		}
		if (i < (lineEnd - 1)) {
			wEditor.Call(SCI_SETTARGETSTART, i + 1);
			wEditor.Call(SCI_SETTARGETEND, lineEnd);
			wEditor.CallString(SCI_REPLACETARGET, 0, "");
		}
	}
}

void SciTEBase::EnsureFinalNewLine() {
	int maxLines = wEditor.Call(SCI_GETLINECOUNT);
	bool appendNewLine = maxLines == 1;
	int endDocument = wEditor.Call(SCI_POSITIONFROMLINE, maxLines);
	if (maxLines > 1) {
		appendNewLine = endDocument > wEditor.Call(SCI_POSITIONFROMLINE, maxLines - 1);
	}
	if (appendNewLine) {
		const char *eol = "\n";
		switch (wEditor.Call(SCI_GETEOLMODE)) {
		case SC_EOL_CRLF:
			eol = "\r\n";
			break;
		case SC_EOL_CR:
			eol = "\r";
			break;
		}
		wEditor.CallString(SCI_INSERTTEXT, endDocument, eol);
	}
}

// Perform any changes needed before saving such as normalizing spaces and line ends.
bool SciTEBase::PrepareBufferForSave(const FilePath &saveName) {
	bool retVal = false;
	// Perform clean ups on text before saving
	wEditor.Call(SCI_BEGINUNDOACTION);
	std::string useStripTrailingSpaces = props.GetNewExpandString("strip.trailing.spaces.", ExtensionFileName().c_str());
	if (useStripTrailingSpaces.length() > 0) {
		if (atoi(useStripTrailingSpaces.c_str()))
			StripTrailingSpaces();
	} else if (props.GetInt("strip.trailing.spaces"))
		StripTrailingSpaces();
	if (props.GetInt("ensure.final.line.end"))
		EnsureFinalNewLine();
	if (props.GetInt("ensure.consistent.line.ends"))
		wEditor.Call(SCI_CONVERTEOLS, wEditor.Call(SCI_GETEOLMODE));

	if (extender)
		retVal = extender->OnBeforeSave(saveName.AsUTF8().c_str());

	wEditor.Call(SCI_ENDUNDOACTION);

	return retVal;
}

/**
 * Writes the buffer to the given filename.
 */
bool SciTEBase::SaveBuffer(const FilePath &saveName, SaveFlags sf) {
	bool retVal = PrepareBufferForSave(saveName);

	if (!retVal) {

		FILE *fp = saveName.Open(fileWrite);
		if (fp) {
			size_t lengthDoc = LengthDocument();
			if (!(sf & sfSynchronous)) {
				wEditor.Call(SCI_SETREADONLY, 1);
				const char *documentBytes = reinterpret_cast<const char *>(wEditor.CallReturnPointer(SCI_GETCHARACTERPOINTER));
				CurrentBuffer()->pFileWorker = new FileStorer(this, documentBytes, saveName, lengthDoc, fp, CurrentBuffer()->unicodeMode, (sf & sfProgressVisible));
				CurrentBuffer()->pFileWorker->sleepTime = props.GetInt("asynchronous.sleep");
				if (PerformOnNewThread(CurrentBuffer()->pFileWorker)) {
					retVal = true;
				} else {
					GUI::gui_string msg = LocaliseMessage("Failed to save file '^0' as thread could not be started.", saveName.AsInternal());
					WindowMessageBox(wSciTE, msg);
				}
			} else {
				Utf8_16_Write convert;
				if (CurrentBuffer()->unicodeMode != uniCookie) {	// Save file with cookie without BOM.
					convert.setEncoding(static_cast<Utf8_16::encodingType>(
							static_cast<int>(CurrentBuffer()->unicodeMode)));
				}
				convert.setfile(fp);
				std::vector<char> data(blockSize + 1);
				retVal = true;
				size_t grabSize;
				for (size_t i = 0; i < lengthDoc; i += grabSize) {
					grabSize = lengthDoc - i;
					if (grabSize > blockSize)
						grabSize = blockSize;
					// Round down so only whole characters retrieved.
					grabSize = wEditor.Call(SCI_POSITIONBEFORE, i + grabSize + 1) - i;
					GetRange(wEditor, static_cast<int>(i), static_cast<int>(i + grabSize), &data[0]);
					const size_t written = convert.fwrite(&data[0], grabSize);
					if (written == 0) {
						retVal = false;
						break;
					}
				}
				if (convert.fclose() != 0) {
					retVal = false;
				}
			}
		}
	}

	if (retVal && extender && (sf & sfSynchronous)) {
		extender->OnSave(saveName.AsUTF8().c_str());
	}
	UpdateStatusBar(true);
	return retVal;
}

void SciTEBase::ReloadProperties() {
	ReadGlobalPropFile();
	SetImportMenu();
	ReadLocalPropFile();
	ReadAbbrevPropFile();
	ReadProperties();
	SetWindowName();
	BuffersMenu();
	Redraw();
}

// Returns false if cancelled or failed to save
bool SciTEBase::Save(SaveFlags sf) {
	if (!filePath.IsUntitled()) {
		GUI::gui_string msg;
		if (CurrentBuffer()->ShouldNotSave()) {
			msg = LocaliseMessage(
				"The file '^0' has not yet been loaded entirely, so it can not be saved right now. Please retry in a while.",
				filePath.AsInternal());
			WindowMessageBox(wSciTE, msg);
			// It is OK to not save this file
			return true;
		}

		if (CurrentBuffer()->pFileWorker) {
			msg = LocaliseMessage(
				"The file '^0' is already being saved.",
				filePath.AsInternal());
			WindowMessageBox(wSciTE, msg);
			// It is OK to not save this file
			return true;
		}

		if (props.GetInt("save.deletes.first")) {
			filePath.Remove();
		} else if (props.GetInt("save.check.modified.time")) {
			const time_t newModTime = filePath.ModifiedTime();
			if ((newModTime != 0) && (CurrentBuffer()->fileModTime != 0) &&
				(newModTime != CurrentBuffer()->fileModTime)) {
				msg = LocaliseMessage("The file '^0' has been modified outside SciTE. Should it be saved?",
					filePath.AsInternal());
				const MessageBoxChoice decision = WindowMessageBox(wSciTE, msg, mbsYesNo | mbsIconQuestion);
				if (decision == mbNo) {
					return false;
				}
			}
		}

		if ((LengthDocument() <= props.GetInt("background.save.size", -1)) ||
			(buffers.SingleBuffer()))
			sf = static_cast<SaveFlags>(sf | sfSynchronous);
		if (SaveBuffer(filePath, sf)) {
			CurrentBuffer()->SetTimeFromFile();
			if (sf & sfSynchronous) {
				wEditor.Call(SCI_SETSAVEPOINT);
				if (IsPropertiesFile(filePath)) {
					ReloadProperties();
				}
			}
		} else {
			if (!CurrentBuffer()->failedSave) {
				CurrentBuffer()->failedSave = true;
				msg = LocaliseMessage(
					"Could not save file '^0'. Save under a different name?", filePath.AsInternal());
				const MessageBoxChoice decision = WindowMessageBox(wSciTE, msg, mbsYesNo | mbsIconWarning);
				if (decision == mbYes) {
					return SaveAsDialog();
				}
			}
			return false;
		}
		return true;
	} else {
		if (props.GetString("save.path.suggestion").length()) {
			time_t t = time(NULL);
			char timeBuff[15];
			strftime(timeBuff, sizeof(timeBuff), "%Y%m%d%H%M%S",  localtime(&t));
			PropSetFile propsSuggestion;
			propsSuggestion.superPS = &props;  // Allow access to other settings
			propsSuggestion.Set("TimeStamp", timeBuff);
			propsSuggestion.Set("SciteUserHome", GetSciteUserHome().AsUTF8().c_str());
			std::string savePathSuggestion = propsSuggestion.GetExpandedString("save.path.suggestion");
			std::replace(savePathSuggestion.begin(), savePathSuggestion.end(), '\\', '/');  // To accept "\" on Unix
			if (savePathSuggestion.size() > 0) {
				filePath = FilePath(GUI::StringFromUTF8(savePathSuggestion)).NormalizePath();
			}
		}
		bool ret = SaveAsDialog();
		if (!ret)
			filePath.Set(GUI_TEXT(""));
		return ret;
	}
}

void SciTEBase::SaveAs(const GUI::gui_char *file, bool fixCase) {
	SetFileName(file, fixCase);
	Save();
	ReadProperties();
	wEditor.Call(SCI_CLEARDOCUMENTSTYLE);
	wEditor.Call(SCI_COLOURISE, 0, wEditor.Call(SCI_POSITIONFROMLINE, 1));
	Redraw();
	SetWindowName();
	BuffersMenu();
	if (extender)
		extender->OnSave(filePath.AsUTF8().c_str());
}

bool SciTEBase::SaveIfNotOpen(const FilePath &destFile, bool fixCase) {
	FilePath absPath = destFile.AbsolutePath();
	const int index = buffers.GetDocumentByName(absPath, true /* excludeCurrent */);
	if (index >= 0) {
		GUI::gui_string msg = LocaliseMessage(
			    "File '^0' is already open in another buffer.", destFile.AsInternal());
		WindowMessageBox(wSciTE, msg);
		return false;
	} else {
		SaveAs(absPath.AsInternal(), fixCase);
		return true;
	}
}

void SciTEBase::AbandonAutomaticSave() {
	CurrentBuffer()->AbandonAutomaticSave();
}

bool SciTEBase::IsStdinBlocked() {
	return false; /* always default to blocked */
}

void SciTEBase::OpenFromStdin(bool UseOutputPane) {
	Utf8_16_Read convert;
	std::vector<char> data(blockSize);

	/* if stdin is blocked, do not execute this method */
	if (IsStdinBlocked())
		return;

	Open(GUI_TEXT(""));
	if (UseOutputPane) {
		wOutput.Call(SCI_CLEARALL);
	} else {
		wEditor.Call(SCI_BEGINUNDOACTION);	// Group together clear and insert
		wEditor.Call(SCI_CLEARALL);
	}
	size_t lenFile = fread(&data[0], 1, data.size(), stdin);
	const UniMode umCodingCookie = CodingCookieValue(&data[0], lenFile);
	while (lenFile > 0) {
		lenFile = convert.convert(&data[0], lenFile);
		if (UseOutputPane) {
			wOutput.CallString(SCI_ADDTEXT, lenFile, convert.getNewBuf());
		} else {
			wEditor.CallString(SCI_ADDTEXT, lenFile, convert.getNewBuf());
		}
		lenFile = fread(&data[0], 1, data.size(), stdin);
	}
	if (UseOutputPane) {
		if (props.GetInt("split.vertical") == 0) {
			heightOutput = 2000;
		} else {
			heightOutput = 500;
		}
		SizeSubWindows();
	} else {
		wEditor.Call(SCI_ENDUNDOACTION);
	}
	CurrentBuffer()->unicodeMode = static_cast<UniMode>(
	            static_cast<int>(convert.getEncoding()));
	// Check the first two lines for coding cookies
	if (CurrentBuffer()->unicodeMode == uni8Bit) {
		CurrentBuffer()->unicodeMode = umCodingCookie;
	}
	if (CurrentBuffer()->unicodeMode != uni8Bit) {
		// Override the code page if Unicode
		codePage = SC_CP_UTF8;
	} else {
		codePage = props.GetInt("code.page");
	}
	if (UseOutputPane) {
		wOutput.Call(SCI_SETSEL, 0, 0);
	} else {
		wEditor.Call(SCI_SETCODEPAGE, codePage);

		// Zero all the style bytes
		wEditor.Call(SCI_CLEARDOCUMENTSTYLE);

		CurrentBuffer()->overrideExtension = "x.txt";
		ReadProperties();
		SetIndentSettings();
		wEditor.Call(SCI_COLOURISE, 0, -1);
		Redraw();

		wEditor.Call(SCI_SETSEL, 0, 0);
	}
}

void SciTEBase::OpenFilesFromStdin() {
	char data[8 * 1024];

	/* if stdin is blocked, do not execute this method */
	if (IsStdinBlocked())
		return;

	while (fgets(data, sizeof(data) - 1, stdin)) {
		char *pNL;
		if ((pNL = strchr(data, '\n')) != NULL)
			* pNL = '\0';
		Open(GUI::StringFromUTF8(data).c_str(), ofQuiet);
	}
	if (buffers.lengthVisible == 0)
		Open(GUI_TEXT(""));
}

class BufferedFile {
	FILE *fp;
	bool readAll;
	bool exhausted;
	enum {bufLen = 64 * 1024};
	char buffer[bufLen];
	size_t pos;
	size_t valid;
	void EnsureData() {
		if (pos >= valid) {
			if (readAll || !fp) {
				exhausted = true;
			} else {
				valid = fread(buffer, 1, bufLen, fp);
				if (valid < bufLen) {
					readAll = true;
				}
				pos = 0;
			}
		}
	}
public:
	explicit BufferedFile(const FilePath &fPath) {
		fp = fPath.Open(fileRead);
		readAll = false;
		exhausted = fp == NULL;
		buffer[0] = 0;
		pos = 0;
		valid = 0;
	}
	~BufferedFile() {
		if (fp) {
			fclose(fp);
		}
		fp = NULL;
	}
	bool Exhausted() const {
		return exhausted;
	}
	int NextByte() {
		EnsureData();
		if (pos >= valid) {
			return 0;
		}
		return buffer[pos++];
	}
	bool BufferContainsNull() {
		EnsureData();
		for (size_t i = 0;i < valid;i++) {
			if (buffer[i] == '\0')
				return true;
		}
		return false;
	}
};

class FileReader {
	std::unique_ptr<BufferedFile> bf;
	int lineNum;
	bool lastWasCR;
	std::string lineToCompare;
	std::string lineToShow;
	bool caseSensitive;
public:
	FileReader(const FilePath &fPath, bool caseSensitive_) {
		bf.reset(new BufferedFile(fPath));
		lineNum = 0;
		lastWasCR = false;
		caseSensitive = caseSensitive_;
	}
	// Deleted so FileReader objects can not be copied.
	FileReader(const FileReader &) = delete;
	~FileReader() {
	}
	const char *Next() {
		if (bf->Exhausted()) {
			return NULL;
		}
		lineToShow.clear();
		while (!bf->Exhausted()) {
			int ch = bf->NextByte();
			if (lastWasCR && ch == '\n' && lineToShow.empty()) {
				lastWasCR = false;
			} else if (ch == '\r' || ch == '\n') {
				lastWasCR = ch == '\r';
				break;
			} else {
				lineToShow.push_back(static_cast<char>(ch));
			}
		}
		lineNum++;
		lineToCompare = lineToShow;
		if (!caseSensitive) {
			LowerCaseAZ(lineToCompare);
		}
		return lineToCompare.c_str();
	}
	int LineNumber() const {
		return lineNum;
	}
	const char *Original() const {
		return lineToShow.c_str();
	}
	bool BufferContainsNull() {
		return bf->BufferContainsNull();
	}
};

static bool IsWordCharacter(int ch) {
	return (ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')  || (ch >= '0' && ch <= '9')  || (ch == '_');
}

bool SciTEBase::GrepIntoDirectory(const FilePath &directory) {
    const GUI::gui_char *sDirectory = directory.AsInternal();
#ifdef __APPLE__
    if (strcmp(sDirectory, "build") == 0)
        return false;
#endif
    return sDirectory[0] != '.';
}

void SciTEBase::GrepRecursive(GrepFlags gf, const FilePath &baseDir, const char *searchString, const GUI::gui_char *fileTypes) {
	FilePathSet directories;
	FilePathSet files;
	baseDir.List(directories, files);
	const size_t searchLength = strlen(searchString);
	std::string os;
	for (const FilePath &fPath : files) {
		if (jobQueue.Cancelled())
			return;
		if (*fileTypes == '\0' || fPath.Matches(fileTypes)) {
			//OutputAppendStringSynchronised(i->AsInternal());
			//OutputAppendStringSynchronised("\n");
			FileReader fr(fPath, gf & grepMatchCase);
			if ((gf & grepBinary) || !fr.BufferContainsNull()) {
				while (const char *line = fr.Next()) {
					const char *match = strstr(line, searchString);
					if (match) {
						if (gf & grepWholeWord) {
							const char *lineEnd = line + strlen(line);
							while (match) {
								if (((match == line) || !IsWordCharacter(match[-1])) &&
								        ((match + searchLength == (lineEnd)) || !IsWordCharacter(match[searchLength]))) {
									break;
								}
								match = strstr(match + 1, searchString);
							}
						}
						if (match) {
							os.append(fPath.AsUTF8().c_str());
							os.append(":");
							std::string lNumber = StdStringFromInteger(fr.LineNumber());
							os.append(lNumber.c_str());
							os.append(":");
							os.append(fr.Original());
							os.append("\n");
						}
					}
				}
			}
		}
	}
	if (os.length()) {
		if (gf & grepStdOut) {
			fwrite(os.c_str(), os.length(), 1, stdout);
		} else {
			OutputAppendStringSynchronised(os.c_str());
		}
	}
	for (const FilePath &fPath : directories) {
		if ((gf & grepDot) || GrepIntoDirectory(fPath.Name())) {
			GrepRecursive(gf, fPath, searchString, fileTypes);
		}
	}
}

void SciTEBase::InternalGrep(GrepFlags gf, const GUI::gui_char *directory, const GUI::gui_char *fileTypes, const char *search, sptr_t &originalEnd) {
	GUI::ElapsedTime commandTime;
	if (!(gf & grepStdOut)) {
		std::string os;
		os.append(">Internal search for \"");
		os.append(search);
		os.append("\" in \"");
		os.append(GUI::UTF8FromString(fileTypes).c_str());
		os.append("\"\n");
		OutputAppendStringSynchronised(os.c_str());
		ShowOutputOnMainThread();
		originalEnd += os.length();
	}
	std::string searchString(search);
	if (!(gf & grepMatchCase)) {
		LowerCaseAZ(searchString);
	}
	GrepRecursive(gf, FilePath(directory), searchString.c_str(), fileTypes);
	if (!(gf & grepStdOut)) {
		std::string sExitMessage(">");
		if (jobQueue.TimeCommands()) {
			sExitMessage += "    Time: ";
			sExitMessage += StdStringFromDouble(commandTime.Duration(), 3);
		}
		sExitMessage += "\n";
		OutputAppendStringSynchronised(sExitMessage.c_str());
	}
}

