Node monitoring and on-the-fly textencoding change

This work is based on the draft node monitoring implementation
created by Vlad Slepukhin during GCI 2012 and includes following:

* Refactoring of the document "Reload" feature - it replaces
"Revert to saved" one because do the same things and a bit more.
Looks like we have to keep "Reload" menu entry alive until
StyledEdit will get more functional Undo/Redo features. Reload
functionality is also heavily used in node monitoring and
on-the-fly text encoding changing. Fixes #6887;

* Support for text encoding on-the-fly switching. This make
life easier for those who lives in countires with multiple
popular 8-bit encodings. Russia is the sample of such
de facto standards' clash (KOI-8R vs CP1251 etc.);

* Node Monitoring support with alerting user in case the file
size or modification time were changed. Another alert is shown
in case edited file was removed or moved outside of the current
volume. Moving file inside of current volume silently changes
references. Choosing "Ignore" will supress new change alerts
until next Reload or Save user request;

* Do not nag user on quiting window with zero-length untitled
document. Not a Big Deal but annoys in some cases using this
editor session as temporary storage.

src/apps/stylededit/Constants.h

@@ -25,7 +25,7 @@ const uint32 MENU_NEW					= 'MFnw';
 const uint32 MENU_OPEN					= 'MFop';
 const uint32 MENU_SAVE					= 'MSav';
 const uint32 MENU_SAVEAS				= 'MEsa';
-const uint32 MENU_REVERT				= 'MFre';
+const uint32 MENU_RELOAD				= 'MFrl';
 const uint32 MENU_CLOSE					= 'MFcl';
 const uint32 MENU_PAGESETUP				= 'MFps';
 const uint32 MENU_PRINT					= 'MFpr';

src/apps/stylededit/StyledEditView.cpp

@@ -73,8 +73,11 @@ StyledEditView::SetSuppressChanges(bool suppressChanges)
 
 
 status_t
-StyledEditView::GetStyledText(BPositionIO* stream)
+StyledEditView::GetStyledText(BPositionIO* stream, const char* forceEncoding)
 {
+	if (forceEncoding != NULL)
+		fEncoding = strcmp(forceEncoding, "auto") != 0 ? forceEncoding : "";
+
 	fSuppressChanges = true;
 	status_t result = BTranslationUtils::GetStyledText(stream, this,
 		fEncoding.String());
@@ -85,24 +88,25 @@ StyledEditView::GetStyledText(BPositionIO* stream)
 
 	BNode* node = dynamic_cast<BNode*>(stream);
 	if (node != NULL) {
-		// get encoding
-		if (node->ReadAttrString("be:encoding", &fEncoding) != B_OK) {
-			// try to read as "int32"
-			int32 encoding;
-			ssize_t bytesRead = node->ReadAttr("be:encoding", B_INT32_TYPE, 0,
-				&encoding, sizeof(encoding));
-			if (bytesRead == (ssize_t)sizeof(encoding)) {
-				if (encoding == 65535) {
-					fEncoding = "UTF-8";
-				} else {
-					const BCharacterSet* characterSet
-						= BCharacterSetRoster::GetCharacterSetByConversionID(encoding);
-					if (characterSet != NULL)
-						fEncoding = characterSet->GetName();
+		if (forceEncoding == NULL) {
+			// get encoding
+			if (node->ReadAttrString("be:encoding", &fEncoding) != B_OK) {
+				// try to read as "int32"
+				int32 encoding;
+				ssize_t bytesRead = node->ReadAttr("be:encoding", B_INT32_TYPE, 0,
+					&encoding, sizeof(encoding));
+				if (bytesRead == (ssize_t)sizeof(encoding)) {
+					if (encoding == 65535) {
+						fEncoding = "UTF-8";
+					} else {
+						const BCharacterSet* characterSet
+							= BCharacterSetRoster::GetCharacterSetByConversionID(encoding);
+						if (characterSet != NULL)
+							fEncoding = characterSet->GetName();
+					}
 				}
 			}
 		}
-
 		// TODO: move those into BTranslationUtils::GetStyledText() as well?
 
 		// restore alignment

src/apps/stylededit/StyledEditView.h

@@ -34,7 +34,8 @@ class StyledEditView : public BTextView {
 
 		void		Reset();
 		void		SetSuppressChanges(bool suppressChanges);
-		status_t	GetStyledText(BPositionIO* stream);
+		status_t	GetStyledText(BPositionIO* stream,
+							const char* forceEncoding = NULL);
 		status_t	WriteStyledEditFile(BFile* file);
 
 		void 		SetEncoding(uint32 encoding);

src/apps/stylededit/StyledEditWindow.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2010, Haiku, Inc. All Rights Reserved.
+ * Copyright 2002-2012, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -8,6 +8,8 @@
  *		Philippe Saint-Pierre
  *		Jonas Sundström
  *		Ryan Leavengood
+ *		Vlad Slepukhin
+ *		Sarzhuk Zharski
  */
 
 
@@ -33,6 +35,7 @@
 #include <Menu.h>
 #include <MenuBar.h>
 #include <MenuItem.h>
+#include <NodeMonitor.h>
 #include <Path.h>
 #include <PrintJob.h>
 #include <Rect.h>
@@ -107,6 +110,8 @@ StyledEditWindow::~StyledEditWindow()
 void
 StyledEditWindow::Quit()
 {
+	_SwitchNodeMonitor(false);
+
 	_SaveAttrs();
 	if (StyledEditApp* app = dynamic_cast<StyledEditApp*>(be_app))
 		app->CloseDocument();
@@ -124,6 +129,9 @@ StyledEditWindow::QuitRequested()
 	if (fClean)
 		return true;
 
+	if (fTextView->TextLength() == 0 && fSaveMessage == NULL)
+		return true;
+
 	BString alertText;
 	bs_printf(&alertText,
 		B_TRANSLATE("Save changes to the document \"%s\"? "), Title());
@@ -179,8 +187,8 @@ StyledEditWindow::MessageReceived(BMessage* message)
 				Quit();
 			break;
 
-		case MENU_REVERT:
-			_RevertToSaved();
+		case MENU_RELOAD:
+			_ReloadDocument(message);
 			break;
 
 		case MENU_CLOSE:
@@ -294,6 +302,10 @@ StyledEditWindow::MessageReceived(BMessage* message)
 			break;
 		}
 
+		case B_NODE_MONITOR:
+			_HandleNodeMonitorEvent(message);
+			break;
+
 		// Font menu
 
 		case FONT_SIZE:
@@ -485,12 +497,12 @@ StyledEditWindow::MessageReceived(BMessage* message)
 				fRedoFlag = false;
 			}
 			if (fClean) {
-				fRevertItem->SetEnabled(false);
 				fSaveItem->SetEnabled(fSaveMessage == NULL);
 			} else {
-				fRevertItem->SetEnabled(fSaveMessage != NULL);
 				fSaveItem->SetEnabled(true);
 			}
+			fReloadItem->SetEnabled(fSaveMessage != NULL);
+			fEncodingItem->SetEnabled(fSaveMessage != NULL);
 			break;
 
 		case SAVE_AS_ENCODING:
@@ -646,6 +658,21 @@ StyledEditWindow::MenusBeginning()
 			fAlignRight->SetMarked(true);
 			break;
 	}
+
+	// text encoding
+	const BCharacterSet* charset
+		= BCharacterSetRoster::GetCharacterSetByFontID(fTextView->GetEncoding());
+	BMenu* encodingMenu = fEncodingItem->Submenu();
+	if (charset != NULL && encodingMenu != NULL) {
+		const char* mime = charset->GetMIMEName();
+		BString name(charset->GetPrintName());
+		if (mime)
+			name << " (" << mime << ")";
+
+		BMenuItem* item = encodingMenu->FindItem(name);
+		if (item != NULL)
+			item->SetMarked(true);
+	}
 }
 
 
@@ -656,6 +683,8 @@ StyledEditWindow::MenusBeginning()
 status_t
 StyledEditWindow::Save(BMessage* message)
 {
+	_NodeMonitorSuspender nodeMonitorSuspender(this);
+
 	if (!message)
 		message = fSaveMessage;
 
@@ -722,10 +751,11 @@ StyledEditWindow::Save(BMessage* message)
 
 	// clear clean modes
 	fSaveItem->SetEnabled(false);
-	fRevertItem->SetEnabled(false);
 	fUndoCleans = false;
 	fRedoCleans = false;
 	fClean = true;
+	fNagOnNodeChange = true;
+
 	return status;
 }
 
@@ -811,6 +841,11 @@ StyledEditWindow::OpenFile(entry_ref* ref)
 
 		_LoadAttrs();
 	}
+
+	_SwitchNodeMonitor(true, ref);
+
+	fReloadItem->SetEnabled(fSaveMessage != NULL);
+	fEncodingItem->SetEnabled(fSaveMessage != NULL);
 	fTextView->Select(0, 0);
 }
 
@@ -841,7 +876,7 @@ StyledEditWindow::Print(const char* documentName)
 		printJob.SetSettings(new BMessage(*fPrintSettings));
 
 	if (printJob.ConfigJob() != B_OK)
- 		return;
+		return;
 
 	delete fPrintSettings;
 	fPrintSettings = printJob.Settings();
@@ -890,7 +925,9 @@ StyledEditWindow::Print(const char* documentName)
 		while (printLine <= lastLine) {
 			float currentHeight = 0;
 			int32 firstLineOnPage = printLine;
-			while (currentHeight < printableRect.Height() && printLine <= lastLine) {
+			while (currentHeight < printableRect.Height()
+				&& printLine <= lastLine)
+			{
 				currentHeight += fTextView->LineHeight(printLine);
 				if (currentHeight < printableRect.Height())
 					printLine++;
@@ -993,6 +1030,8 @@ StyledEditWindow::_InitWindow(uint32 encoding)
 	fWrapAround = false;
 	fBackSearch = false;
 
+	fNagOnNodeChange = true;
+
 	// add menubar
 	fMenuBar = new BMenuBar(BRect(0, 0, 0, 0), "menubar");
 	AddChild(fMenuBar);
@@ -1043,10 +1082,11 @@ StyledEditWindow::_InitWindow(uint32 encoding)
 	menuItem->SetShortcut('S', B_SHIFT_KEY);
 	menuItem->SetEnabled(true);
 
-	menu->AddItem(fRevertItem
-		= new BMenuItem(B_TRANSLATE("Revert to saved" B_UTF8_ELLIPSIS),
-		new BMessage(MENU_REVERT)));
-	fRevertItem->SetEnabled(false);
+	menu->AddItem(fReloadItem
+		= new BMenuItem(B_TRANSLATE("Reload" B_UTF8_ELLIPSIS),
+		new BMessage(MENU_RELOAD), 'L'));
+	fReloadItem->SetEnabled(false);
+
 	menu->AddItem(new BMenuItem(B_TRANSLATE("Close"),
 		new BMessage(MENU_CLOSE), 'W'));
 
@@ -1107,7 +1147,7 @@ StyledEditWindow::_InitWindow(uint32 encoding)
 	fFontMenu = new BMenu(B_TRANSLATE("Font"));
 	fMenuBar->AddItem(fFontMenu);
 
-	//"Size"-subMenu
+	// "Size"-subMenu
 	fFontSizeMenu = new BMenu(B_TRANSLATE("Size"));
 	fFontSizeMenu->SetRadioMode(true);
 	fFontMenu->AddItem(fFontSizeMenu);
@@ -1210,6 +1250,9 @@ StyledEditWindow::_InitWindow(uint32 encoding)
 	fWrapItem->SetMarked(true);
 	fWrapItem->SetShortcut('W', B_OPTION_KEY);
 
+	menu->AddItem(fEncodingItem = _MakeEncodingMenuItem());
+	fEncodingItem->SetEnabled(false);
+
 	menu->AddSeparatorItem();
 	menu->AddItem(new BMenuItem(B_TRANSLATE("Statistics" B_UTF8_ELLIPSIS),
 		new BMessage(SHOW_STATISTICS)));
@@ -1286,7 +1329,7 @@ StyledEditWindow::_SaveAttrs()
 
 
 status_t
-StyledEditWindow::_LoadFile(entry_ref* ref)
+StyledEditWindow::_LoadFile(entry_ref* ref, const char* forceEncoding)
 {
 	BEntry entry(ref, true);
 		// traverse an eventual link
@@ -1299,7 +1342,7 @@ StyledEditWindow::_LoadFile(entry_ref* ref)
 	if (status == B_OK)
 		status = file.SetTo(&entry, B_READ_ONLY);
 	if (status == B_OK)
-		status = fTextView->GetStyledText(&file);
+		status = fTextView->GetStyledText(&file, forceEncoding);
 
 	if (status == B_ENTRY_NOT_FOUND) {
 		// Treat non-existing files consideratley; we just want to get an
@@ -1351,11 +1394,14 @@ StyledEditWindow::_LoadFile(entry_ref* ref)
 
 
 void
-StyledEditWindow::_RevertToSaved()
+StyledEditWindow::_ReloadDocument(BMessage* message)
 {
 	entry_ref ref;
 	const char* name;
 
+	if (fSaveMessage == NULL || message == NULL)
+		return;
+
 	fSaveMessage->FindRef("directory", &ref);
 	fSaveMessage->FindString("name", &name);
 
@@ -1376,15 +1422,40 @@ StyledEditWindow::_RevertToSaved()
 		return;
 	}
 
-	BString alertText;
-	bs_printf(&alertText,
-		B_TRANSLATE("Revert to the last version of \"%s\"? "), Title());
-	if (_ShowAlert(alertText, B_TRANSLATE("Cancel"), B_TRANSLATE("OK"),
-		"", B_WARNING_ALERT) != 1)
-		return;
+	if (!fClean) {
+		BString alertText;
+		bs_printf(&alertText,
+			B_TRANSLATE("\"%s\" has unsaved changes.\n"
+				"Revert it to the last saved version? "), Title());
+		if (_ShowAlert(alertText, B_TRANSLATE("Cancel"), B_TRANSLATE("OK"),
+			"", B_WARNING_ALERT) != 1)
+			return;
+	}
+
+	const char* forceEncoding = NULL;
+	if (message->FindString("encoding", &forceEncoding) != B_OK) {
+		const BCharacterSet* charset
+			= BCharacterSetRoster::GetCharacterSetByFontID(
+					fTextView->GetEncoding());
+		if (charset != NULL)
+			forceEncoding = charset->GetName();
+	}
+
+	BScrollBar* vertBar = fScrollView->ScrollBar(B_VERTICAL);
+	float vertPos = vertBar != NULL ? vertBar->Value() : 0.f;
+
+	DisableUpdates();
 
 	fTextView->Reset();
-	if (_LoadFile(&ref) != B_OK)
+
+	status = _LoadFile(&ref, forceEncoding);
+
+	if (vertBar != NULL)
+		vertBar->SetValue(vertPos);
+
+	EnableUpdates();
+
+	if (status != B_OK)
 		return;
 
 #undef B_TRANSLATION_CONTEXT
@@ -1400,10 +1471,12 @@ StyledEditWindow::_RevertToSaved()
 
 	// clear clean modes
 	fSaveItem->SetEnabled(false);
-	fRevertItem->SetEnabled(false);
+
 	fUndoCleans = false;
 	fRedoCleans = false;
 	fClean = true;
+
+	fNagOnNodeChange = true;
 }
 
 
@@ -1656,7 +1729,8 @@ StyledEditWindow::_UpdateCleanUndoRedoSaveRevert()
 	fClean = false;
 	fUndoCleans = false;
 	fRedoCleans = false;
-	fRevertItem->SetEnabled(fSaveMessage != NULL);
+	fReloadItem->SetEnabled(fSaveMessage != NULL);
+	fEncodingItem->SetEnabled(fSaveMessage != NULL);
 	fSaveItem->SetEnabled(true);
 	fUndoItem->SetLabel(B_TRANSLATE("Can't undo"));
 	fUndoItem->SetEnabled(false);
@@ -1686,3 +1760,234 @@ StyledEditWindow::_ShowAlert(const BString& text, const BString& label,
 
 	return alert->Go();
 }
+
+
+BMenuItem*
+StyledEditWindow::_MakeEncodingMenuItem()
+{
+	BMenu* menu = new BMenu(B_TRANSLATE("Text encoding"));
+
+	BCharacterSetRoster roster;
+	BCharacterSet charset;
+	while (roster.GetNextCharacterSet(&charset) == B_OK) {
+		const char* mime = charset.GetMIMEName();
+		BString name(charset.GetPrintName());
+
+		if (mime)
+			name << " (" << mime << ")";
+
+		BMessage *message = new BMessage(MENU_RELOAD);
+		if (message != NULL) {
+			message->AddString("encoding", charset.GetName());
+			menu->AddItem(new BMenuItem(name, message));
+		}
+	}
+
+	menu->AddSeparatorItem();
+	BMessage *message = new BMessage(MENU_RELOAD);
+	message->AddString("encoding", "auto");
+	menu->AddItem(new BMenuItem(B_TRANSLATE("Autodetect"), message));
+
+	menu->SetRadioMode(true);
+
+	return new BMenuItem(menu, new BMessage(MENU_RELOAD));
+}
+
+
+#undef B_TRANSLATION_CONTEXT
+#define B_TRANSLATION_CONTEXT "NodeMonitorAlerts"
+
+
+void
+StyledEditWindow::_ShowNodeChangeAlert(const char* name, bool removed)
+{
+	if (!fNagOnNodeChange)
+		return;
+
+	BString alertText(removed ? B_TRANSLATE("File \"%file%\" was removed by "
+		"another application, recover it?")
+		: B_TRANSLATE("File \"%file%\" was modified by "
+		"another application, reload it?"));
+	alertText.ReplaceAll("%file%", name);
+
+	if (_ShowAlert(alertText, removed ? B_TRANSLATE("Recover")
+			: B_TRANSLATE("Reload"), B_TRANSLATE("Ignore"), "",
+			B_WARNING_ALERT) == 0)
+	{
+		if (!removed) {
+			// supress the warning - user has already agreed
+			fClean = true;
+			BMessage msg(MENU_RELOAD);
+			_ReloadDocument(&msg);
+		} else
+			Save();
+	} else
+		fNagOnNodeChange = false;
+
+	fSaveItem->SetEnabled(!fClean);
+}
+
+
+void
+StyledEditWindow::_HandleNodeMonitorEvent(BMessage *message)
+{
+	int32 opcode = 0;
+	if (message->FindInt32("opcode", &opcode) != B_OK)
+		return;
+
+	if (opcode != B_ENTRY_CREATED
+		&& message->FindInt64("node") != fNodeRef.node)
+		// bypass foreign nodes' event
+		return;
+
+	switch (opcode) {
+		case B_STAT_CHANGED:
+			{
+				int32 fields = 0;
+				if (message->FindInt32("fields", &fields) == B_OK
+					&& (fields & (B_STAT_SIZE | B_STAT_MODIFICATION_TIME)) == 0)
+					break;
+
+				const char* name = NULL;
+				if (fSaveMessage->FindString("name", &name) != B_OK)
+					break;
+
+				_ShowNodeChangeAlert(name, false);
+			}
+			break;
+
+		case B_ENTRY_MOVED:
+			{
+				int32 device = 0;
+				int64 srcFolder = 0;
+				int64 dstFolder = 0;
+				const char* name = NULL;
+				if (message->FindInt32("device", &device) != B_OK
+					|| message->FindInt64("to directory", &dstFolder) != B_OK
+					|| message->FindInt64("from directory", &srcFolder) != B_OK
+					|| message->FindString("name", &name) != B_OK)
+						break;
+
+				entry_ref newRef(device, dstFolder, name);
+				BEntry entry(&newRef);
+
+				BEntry dirEntry;
+				entry.GetParent(&dirEntry);
+
+				entry_ref ref;
+				dirEntry.GetRef(&ref);
+				fSaveMessage->ReplaceRef("directory", &ref);
+				fSaveMessage->ReplaceString("name", name);
+
+				// store previous name - it may be useful in case
+				// we have just moved to temporary copy of file (vim case)
+				const char* sourceName = NULL;
+				if (message->FindString("from name", &sourceName) == B_OK) {
+					fSaveMessage->RemoveName("org.name");
+					fSaveMessage->AddString("org.name", sourceName);
+					fSaveMessage->RemoveName("move time");
+					fSaveMessage->AddInt64("move time", system_time());
+				}
+
+				SetTitle(name);
+				be_roster->AddToRecentDocuments(&newRef, APP_SIGNATURE);
+
+				if (srcFolder != dstFolder) {
+					_SwitchNodeMonitor(false);
+					_SwitchNodeMonitor(true);
+				}
+			}
+			break;
+
+		case B_ENTRY_REMOVED:
+			{
+				_SwitchNodeMonitor(false);
+
+				fClean = false;
+
+				// some editors like vim save files in following way:
+				// 1) move t.txt -> t.txt~
+				// 2) re-create t.txt and write data to it
+				// 3) remove t.txt~
+				// go to catch this case
+				int32 device = 0;
+				int64 directory = 0;
+				BString orgName;
+				if (fSaveMessage->FindString("org.name", &orgName) == B_OK
+					&& message->FindInt32("device", &device) == B_OK
+					&& message->FindInt64("directory", &directory) == B_OK)
+				{
+					// reuse the source name if it is not too old
+					bigtime_t time = fSaveMessage->FindInt64("move time");
+					if ((system_time() - time) < 1000000) {
+						entry_ref ref(device, directory, orgName);
+						BEntry entry(&ref);
+						if (entry.InitCheck() == B_OK) {
+							_SwitchNodeMonitor(true, &ref);
+						}
+
+						fSaveMessage->ReplaceString("name", orgName);
+						fSaveMessage->RemoveName("org.name");
+						fSaveMessage->RemoveName("move time");
+
+						SetTitle(orgName);
+						_ShowNodeChangeAlert(orgName, false);
+						break;
+					}
+				}
+
+				const char* name = NULL;
+				if (message->FindString("name", &name) != B_OK
+					&& fSaveMessage->FindString("name", &name) != B_OK)
+					name = "Unknown";
+
+				_ShowNodeChangeAlert(name, true);
+			}
+			break;
+
+		default:
+			break;
+	}
+}
+
+
+void
+StyledEditWindow::_SwitchNodeMonitor(bool on, entry_ref* ref)
+{
+	if (!on) {
+		watch_node(&fNodeRef, B_STOP_WATCHING, this);
+		watch_node(&fFolderNodeRef, B_STOP_WATCHING, this);
+		fNodeRef = node_ref();
+		fFolderNodeRef = node_ref();
+		return;
+	}
+
+	BEntry entry, folderEntry;
+
+	if (ref != NULL) {
+		entry.SetTo(ref, true);
+		entry.GetParent(&folderEntry);
+
+	} else if (fSaveMessage != NULL) {
+		entry_ref ref;
+		const char* name = NULL;
+		if (fSaveMessage->FindRef("directory", &ref) != B_OK
+			|| fSaveMessage->FindString("name", &name) != B_OK)
+			return;
+
+		BDirectory dir(&ref);
+		entry.SetTo(&dir, name);
+		folderEntry.SetTo(&ref);
+
+	} else
+		return;
+
+	if (entry.InitCheck() != B_OK || folderEntry.InitCheck() != B_OK)
+		return;
+
+	entry.GetNodeRef(&fNodeRef);
+	folderEntry.GetNodeRef(&fFolderNodeRef);
+
+	watch_node(&fNodeRef, B_WATCH_STAT, this);
+	watch_node(&fFolderNodeRef, B_WATCH_DIRECTORY, this);
+}

src/apps/stylededit/StyledEditWindow.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2010, Haiku, Inc. All Rights Reserved.
+ * Copyright 2002-2012, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -15,15 +15,15 @@
 #include <Window.h>
 #include <String.h>
 #include <Message.h>
-
+#include <Node.h>
 
 struct entry_ref;
 
+class BFilePanel;
 class BMenu;
-class BMessage;
 class BMenuBar;
 class BMenuItem;
-class BFilePanel;
+class BMessage;
 class BScrollView;
 class StyledEditView;
 
@@ -52,10 +52,12 @@ public:
 
 private:
 			void				_InitWindow(uint32 encoding = 0);
+			BMenuItem*			_MakeEncodingMenuItem();
 			void				_LoadAttrs();
 			void				_SaveAttrs();
-			status_t			_LoadFile(entry_ref* ref);
-			void				_RevertToSaved();
+			status_t			_LoadFile(entry_ref* ref,
+									const char* forceEncoding = NULL);
+			void				_ReloadDocument(BMessage *message);
 			bool				_Search(BString searchFor, bool caseSensitive,
 									bool wrap, bool backSearch,
 									bool scrollToOccurence = true);
@@ -76,6 +78,27 @@ private:
 									const BString& label3,
 									alert_type type) const;
 
+				// node monitoring helper
+			class _NodeMonitorSuspender {
+				StyledEditWindow *fWindow;
+			public:
+				_NodeMonitorSuspender(StyledEditWindow *w) : fWindow(w) {
+					fWindow->_SwitchNodeMonitor(false);
+				}
+
+				~_NodeMonitorSuspender() {
+					fWindow->_SwitchNodeMonitor(true);
+				}
+			};
+
+			friend class		_NodeMonitorSuspender;
+
+			void				_HandleNodeMonitorEvent(BMessage *message);
+			void				_ShowNodeChangeAlert(const char* name,
+									bool removed);
+			void				_SwitchNodeMonitor(bool on,
+									entry_ref* ref = NULL);
+
 private:
 			BMenuBar*			fMenuBar;
 			BMessage*			fPrintSettings;
@@ -89,7 +112,7 @@ private:
 			BMenuItem*			fCurrentStyleItem;
 
 			BMenuItem*			fSaveItem;
-			BMenuItem*			fRevertItem;
+			BMenuItem*			fReloadItem;
 
 			BMenuItem*			fUndoItem;
 			BMenuItem*			fCutItem;
@@ -113,6 +136,7 @@ private:
 			BMenuItem*			fAlignLeft;
 			BMenuItem*			fAlignCenter;
 			BMenuItem*			fAlignRight;
+			BMenuItem*			fEncodingItem;
 
 			BString				fStringToFind;
 			BString				fReplaceString;
@@ -139,6 +163,10 @@ private:
 
 			BFilePanel*			fSavePanel;
 			BMenu*				fSavePanelEncodingMenu;
+				// node monitoring
+			node_ref			fNodeRef;
+			node_ref			fFolderNodeRef;
+			bool				fNagOnNodeChange;
 };