2 files changed, 21 insertions, 10 deletions

diff --git a/src/Document.cxx b/src/Document.cxx
index 22cb0c2b0..97ca97adc 100644
--- a/src/Document.cxx
+++ b/src/Document.cxx
@@ -354,7 +354,9 @@ bool Document::DeleteChars(int pos, int len) {
 		NotifyModifyAttempt();
 		enteredReadOnlyCount--;
 	}
-	if (enteredCount == 0) {
+	if (enteredCount != 0) {
+		return false;
+	} else {
 		enteredCount++;
 		if (!cb.IsReadOnly()) {
 			NotifyModified(
@@ -388,7 +390,9 @@ bool Document::InsertStyledString(int position, char *s, int insertLength) {
 		NotifyModifyAttempt();
 		enteredReadOnlyCount--;
 	}
-	if (enteredCount == 0) {
+	if (enteredCount != 0) {
+		return false;
+	} else {
 		enteredCount++;
 		if (!cb.IsReadOnly()) {
 			NotifyModified(
@@ -823,8 +827,9 @@ class DocumentIndexer : public CharacterIndexer {
 	Document *pdoc;
 	int end;
 public:
-DocumentIndexer(Document *pdoc_, int end_) :
-	pdoc(pdoc_), end(end_) {}
+	DocumentIndexer(Document *pdoc_, int end_) :
+		pdoc(pdoc_), end(end_) {
+	}
 
 	virtual char CharAt(int index) {
 		if (index < 0 || index >= end)
@@ -1082,8 +1087,10 @@ void Document::StartStyling(int position, char mask) {
 	endStyled = position;
 }
 
-void Document::SetStyleFor(int length, char style) {
-	if (enteredCount == 0) {
+bool Document::SetStyleFor(int length, char style) {
+	if (enteredCount != 0) {
+		return false;
+	} else {
 		enteredCount++;
 		int prevEndStyled = endStyled;
 		if (cb.SetStyleFor(endStyled, length, style, stylingMask)) {
@@ -1093,11 +1100,14 @@ void Document::SetStyleFor(int length, char style) {
 		}
 		endStyled += length;
 		enteredCount--;
+		return true;
 	}
 }
 
-void Document::SetStyles(int length, char *styles) {
-	if (enteredCount == 0) {
+bool Document::SetStyles(int length, char *styles) {
+	if (enteredCount != 0) {
+		return false;
+	} else {
 		enteredCount++;
 		int prevEndStyled = endStyled;
 		bool didChange = false;
@@ -1113,6 +1123,7 @@ void Document::SetStyles(int length, char *styles) {
 			NotifyModified(mh);
 		}
 		enteredCount--;
+		return true;
 	}
 }
 
diff --git a/src/Document.h b/src/Document.h
index 34c49a5a6..82931207c 100644
--- a/src/Document.h
+++ b/src/Document.h
@@ -202,8 +202,8 @@ public:
 	void SetWordChars(unsigned char *chars);
 	void SetStylingBits(int bits);
 	void StartStyling(int position, char mask);
-	void SetStyleFor(int length, char style);
-	void SetStyles(int length, char *styles);
+	bool SetStyleFor(int length, char style);
+	bool SetStyles(int length, char *styles);
 	int GetEndStyled() { return endStyled; }
 	bool EnsureStyledTo(int pos);
 	int GetStyleClock() { return styleClock; }