CtrlLib: TextCtrl::MaxLength handling improved

git-svn-id: svn://ultimatepp.org/upp/trunk@8285 f0d560ea-af0d-0410-9eb7-867de7ffcac7

uppsrc/CtrlLib/Text.cpp

@@ -25,6 +25,7 @@ TextCtrl::TextCtrl()
 	nobg = false;
 	rectsel = false;
 	max_total = 400 * 1024 * 1024;
+	truncated = false;
 }
 
 TextCtrl::~TextCtrl() {}
@@ -53,6 +54,7 @@ void TextCtrl::Clear()
 {
 	cline = cpos = 0;
 	total = 0;
+	truncated = false;
 	line.Clear();
 	line.Shrink();
 	ClearLines();
@@ -120,6 +122,7 @@ int   TextCtrl::Load(Stream& in, byte charset) {
 	}
 	bool cr = false;
 	byte b8 = 0;
+	truncated = true;
 	if(charset == CHARSET_UTF8)
 		for(;;) {
 			byte h[200];
@@ -157,7 +160,7 @@ int   TextCtrl::Load(Stream& in, byte charset) {
 						LTIMING("ADD");
 						int len = (b8 & 0x80) ? utf8len(~ln, ln.GetCount()) : ln.GetCount();
 						if(total + len + 1 > max_total)
-							break;
+							goto out_of_limit;
 						total += len + 1;
 						Ln& l = line.Add();
 						l.len = len;
@@ -197,7 +200,7 @@ int   TextCtrl::Load(Stream& in, byte charset) {
 				if(b < s) {
 					LTIMING("ln.Cat");
 					if(b - s + ln.GetCount() > max_total)
-						break;
+						goto out_of_limit;
 					ln.Cat((const char *)b, (const char *)s);
 				}
 				if(s < e) {
@@ -208,14 +211,14 @@ int   TextCtrl::Load(Stream& in, byte charset) {
 							LTIMING("ToUnicode");
 							WString w = ToUnicode(~ln, ln.GetCount(), charset);
 							if(total + w.GetLength() + 1 > max_total)
-								break;
+								goto out_of_limit;
 							line.Add(w);
 							total += w.GetLength() + 1;
 						}
 						else {
 							LTIMING("ADD");
 							if(total + ln.GetCount() + 1 > max_total)
-								break;
+								goto out_of_limit;
 							total += ln.GetCount() + 1;
 							Ln& l = line.Add();
 							l.len = ln.GetCount();
@@ -230,6 +233,8 @@ int   TextCtrl::Load(Stream& in, byte charset) {
 			}
 		}
 
+	truncated = false;
+out_of_limit:
 	WString w = ToUnicode(~ln, ln.GetCount(), charset);
 	if(total + w.GetLength() <= max_total) {
 		line.Add(w);
@@ -239,10 +244,14 @@ int   TextCtrl::Load(Stream& in, byte charset) {
 	Update();
 	SetSb();
 	PlaceCaret(0);
+	if(truncated)
+		SetReadOnly();
 	return line.GetCount() > 1 ? cr ? LE_CRLF : LE_LF : LE_DEFAULT;
 }
 
 void   TextCtrl::Save(Stream& s, byte charset, int line_endings) const {
+	if(truncated)
+		return;
 	if(charset == CHARSET_UTF8_BOM) {
 		static byte bom[] = { 0xEF, 0xBB, 0xBF };
 		s.Put(bom, 3);

uppsrc/CtrlLib/TextEdit.h

@@ -75,6 +75,7 @@ protected:
 	int              dirty;
 	int              undo_op;
 	byte             charset;
+	bool             truncated;
 
 	bool             selclick;
 	Point            dropcaret;
@@ -112,6 +113,7 @@ public:
 	enum { LE_DEFAULT, LE_CRLF, LE_LF };
 
 	int    Load(Stream& s, byte charset = CHARSET_DEFAULT);
+	bool   IsTruncated() const                                { return false; }
 	void   Save(Stream& s, byte charset = CHARSET_DEFAULT, int line_endings = LE_DEFAULT) const;
 
 	int    GetInvalidCharPos(byte charset = CHARSET_DEFAULT) const;

uppsrc/CtrlLib/src.tpp/TextCtrl$en-us.tpp

@@ -124,9 +124,17 @@ Unlikely to be used in the client code.&]
 ]_[*@3 s], [_^byte^ byte]_[*@3 charset]_`=_CHARSET`_DEFAULT)&]
 [s2;%% Loads the text from the stream with defined [%-*@3 charset]. 
 Function returns the detected line endings mode `- LE`_CRLF, 
-LE`_LF or LE`_DEFAULT if there were no line endings in the file.&]
+LE`_LF or LE`_DEFAULT if there were no line endings in the file. 
+If file is bigger then the limit set by MaxLength, editor is 
+put into `'truncated`' and read`-only mode.&]
 [s3;%% &]
 [s4; &]
+[s5;:TextCtrl`:`:IsTruncated`(`)const: [@(0.0.255) bool]_[* IsTruncated]()_[@(0.0.255) cons
+t]&]
+[s2;%% Indicates that last Load had to truncate the size because 
+of MaxLength limit.&]
+[s3; &]
+[s4; &]
 [s5;:TextCtrl`:`:Save`(Stream`&`,byte`,int`)const: [@(0.0.255) void]_[* Save]([_^Stream^ St
 ream][@(0.0.255) `&]_[*@3 s], [_^byte^ byte]_[*@3 charset]_`=_CHARSET`_DEFAULT, 
 [@(0.0.255) int]_[*@3 line`_endings]_`=_LE`_DEFAULT)_[@(0.0.255) const]&]
@@ -135,7 +143,7 @@ that cannot be represented in suggested [%-*@3 charset] are saved
 as `'?`'. [%-*@3 line`_endings] parameter sets the line ending 
 mode. LE`_DEFAULT uses platform specific line endings (CRLF in 
 Windows, LF in POSIX), LE`_CRLF sets CRLF line endings, LE`_LF 
-sets LF line endings).&]
+sets LF line endings). If IsTruncated is true, Save is blocked.&]
 [s3;%% &]
 [s4; &]
 [s5;:TextCtrl`:`:GetInvalidCharPos`(byte`)const: [@(0.0.255) int]_[* GetInvalidCharPos]([_^byte^ b

uppsrc/ide/idefile.cpp

@@ -531,7 +531,7 @@ void Ide::EditFile0(const String& path, byte charset, bool astext, const String&
 		editor.SetPickUndoData(pick(fd.undodata));
 		editor.SetLineInfo(fd.lineinfo);
 		editor.SetLineInfoRem(pick(fd.lineinforem));
-		if(ff.IsReadOnly() || IsNestReadOnly(editfile)) {
+		if(ff.IsReadOnly() || IsNestReadOnly(editfile) || editor.IsTruncated()) {
 			editor.SetReadOnly();
 			editor.NoShowReadOnly();
 		}