diff --git a/sources/appl/Buffer/Buffer.cpp b/sources/appl/Buffer/Buffer.cpp
index 34eb95c..9490735 100644
--- a/sources/appl/Buffer/Buffer.cpp
+++ b/sources/appl/Buffer/Buffer.cpp
@@ -10,6 +10,11 @@
 #include <appl/Buffer/Buffer.h>
 #include <appl/Debug.h>
 
+appl::Buffer::Buffer(void) :
+	m_cursorPos(3)
+{
+	
+}
 
 bool appl::Buffer::LoadFile(const etk::UString& _name)
 {
@@ -31,3 +36,39 @@ void appl::Buffer::SetFileName(const etk::UString& _name)
 	// TODO : ...
 }
 
+bool appl::Buffer::OnEventEntry(const ewol::EventEntry& _event)
+{
+	APPL_DEBUG(" event : " << _event);
+	if (_event.GetType() == ewol::keyEvent::keyboardChar) {
+		//APPL_DEBUG("KB EVENT : \"" << UTF8_data << "\" size=" << strlen(UTF8_data) << "type=" << (int32_t)typeEvent);
+		if (_event.GetStatus() != ewol::keyEvent::statusDown) {
+			return false;
+		}
+		if (_event.GetChar() == etk::UniChar::Tabulation) {
+			m_data.Insert(m_cursorPos, '\t');
+		} else if (_event.GetChar() == etk::UniChar::Return) {
+			m_data.Insert(m_cursorPos, '\n');
+		} else if (_event.GetChar() == etk::UniChar::Backspace ) {
+			APPL_INFO("keyEvent : <suppr>	pos=" << m_cursorPos);
+		} else if (_event.GetChar() == etk::UniChar::Delete) {
+			APPL_INFO("keyEvent : <del>	pos=" << m_cursorPos);
+		} else {
+			// normal adding char ...
+			char output[5];
+			int32_t nbElement = _event.GetChar().GetUtf8(output);
+			etk::Vector<int8_t> values;
+			for (int32_t iii=0; iii<nbElement; ++iii) {
+				values.PushBack(output[iii]);
+			}
+			m_data.Insert(m_cursorPos, values);
+		}
+		return true;
+	}
+	// move events ...
+	if (_event.GetStatus() == ewol::keyEvent::statusDown) {
+		//m_buffer->CursorMove(_event.GetType());
+		
+		return true;
+	}
+	return false;
+}
diff --git a/sources/appl/Buffer/Buffer.h b/sources/appl/Buffer/Buffer.h
index c15bae7..c41b759 100644
--- a/sources/appl/Buffer/Buffer.h
+++ b/sources/appl/Buffer/Buffer.h
@@ -15,13 +15,14 @@
 #include <ewol/ewol.h>
 #include <etk/Buffer.h>
 #include <ewol/renderer/EObject.h>
+#include <ewol/widget/Widget.h>
 
 namespace appl
 {
 	class Buffer : public ewol::EObject
 	{
 		public:
-			Buffer(void) { };
+			Buffer(void);
 			~Buffer(void) { };
 		private:
 			etk::UString m_fileName; //!< name of the file (with his path)
@@ -42,6 +43,9 @@ namespace appl
 			ejson::Value* m_property;
 			appl::Selection m_selection;
 			*/
+		public:
+			esize_t m_cursorPos; //!< cursor position.
+			bool OnEventEntry(const ewol::EventEntry& _event);
 	};
 };
 
diff --git a/sources/appl/Gui/TextViewer.cpp b/sources/appl/Gui/TextViewer.cpp
index dcf236b..1f84c3b 100644
--- a/sources/appl/Gui/TextViewer.cpp
+++ b/sources/appl/Gui/TextViewer.cpp
@@ -24,7 +24,8 @@
 
 appl::TextViewer::TextViewer(const etk::UString& _fontName, int32_t _fontSize) :
 	m_buffer(NULL),
-	m_displayText(_fontName, _fontSize)
+	m_displayText(_fontName, _fontSize),
+	m_insertMode(false)
 {
 	SetCanHaveFocus(true);
 	RegisterMultiCast(ednMsgBufferId);
@@ -87,109 +88,193 @@ void appl::TextViewer::OnDraw(void)
 }
 
 
-esize_t appl::TextViewer::Get(esize_t _pos, UniChar& _value, charset_te _charset) const
+esize_t appl::TextViewer::Get(esize_t _pos, etk::UniChar& _value, unicode::charset_te _charset) const
 {
 	_value = '\0';
 	if (_charset == unicode::EDN_CHARSET_UTF8) {
-		char tmpVal[8];
-		tmpVal[0] = m_buffer[_pos];
-		tmpVal[1] = m_buffer[_pos+1];
-		tmpVal[2] = m_buffer[_pos+2];
-		tmpVal[3] = m_buffer[_pos+3];
-		tmpVal[4] = m_buffer[_pos+4];
-		tmpVal[5] = m_buffer[_pos+5];
-		tmpVal[6] = m_buffer[_pos+6];
-		tmpVal[7] = '\0';
+		char tmpVal[5];
+		tmpVal[0] = m_buffer->GetData()[_pos];
+		tmpVal[1] = m_buffer->GetData()[_pos+1];
+		tmpVal[2] = m_buffer->GetData()[_pos+2];
+		tmpVal[3] = m_buffer->GetData()[_pos+3];
+		tmpVal[4] = '\0';
 		// transform ...
-		
+		int32_t nbElement = _value.SetUtf8(tmpVal);
+		return nbElement;
 	}
 	// TODO :: need to trancode iso ==> UNICODE ...
-	_value = m_buffer[_pos];
-	return _pos+1;
+	_value.Set(m_buffer->GetData()[_pos]);
+	return 1;
 }
 
+static const char *ControlCodeTable[32] = {
+	 "NUL", "soh", "stx", "etx", "eot", "enq", "ack", "bel", "bs",  "ht", "nl",  "vt",  "np", "cr", "so", "si",
+	 "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb", "can", "em", "sub", "esc", "fs", "gs", "rs", "us"};
+
+void appl::TextViewer::Expand(esize_t& _indent, const etk::UniChar& _value, etk::UString& _out) const
+{
+	_out.Clear();
+	int32_t tabDist = 4;
+	if (_value == etk::UniChar::Tabulation) {
+		int32_t nSpaces = tabDist - (_indent % tabDist);
+		for (int32_t iii=0; iii<nSpaces; iii++) {
+			_out.Append(etk::UniChar::Space);
+		}
+		return;
+	}
+	// Convert ASCII control codes to readable character sequences
+	if (_value == etk::UniChar::Null) {
+		_out.Append(etk::UniChar('<'));
+		_out.Append(etk::UniChar('n'));
+		_out.Append(etk::UniChar('u'));
+		_out.Append(etk::UniChar('l'));
+		_out.Append(etk::UniChar('>'));
+		return;
+	}
+	if (_value == etk::UniChar::Return) {
+		// nothing to display...
+		return;
+	}
+	if (_value.Get() <= 31) {
+		_out.Append(etk::UniChar('<'));
+		const char * tmp = ControlCodeTable[_value.Get()];
+		while (*tmp!='\0') {
+			_out.Append(etk::UniChar(*tmp));
+			tmp++;
+		}
+		_out.Append(etk::UniChar('>'));
+		return;
+	}
+	if (_value == etk::UniChar::Delete) {
+		_out.Append(etk::UniChar('<'));
+		_out.Append(etk::UniChar('d'));
+		_out.Append(etk::UniChar('e'));
+		_out.Append(etk::UniChar('l'));
+		_out.Append(etk::UniChar('>'));
+		return;
+	}
+	// nothing to do ...
+	_out.Append(_value);
+	//APPL_DEBUG("plop : " << _out);
+}
+
+
 
 void appl::TextViewer::OnRegenerateDisplay(void)
 {
-	if (true == NeedRedraw()) {
-		// For the scrooling windows
-		CalculateMaxSize();
-		m_displayDrawing.Clear();
-		m_displayText.Clear();
-		
-		// Reset the background :
-		m_displayDrawing.SetPos(vec3(0, 0, 0));
-		m_displayDrawing.SetColor(etk::Color<>(220, 220, 220, 256));
-		m_displayDrawing.RectangleWidth(m_size);
-		
-		if (m_buffer == NULL) {
-			m_displayText.SetTextAlignement(10, m_size.x()-20, ewol::Text::alignLeft);
-			m_displayText.SetRelPos(vec3(10, 0, 0));
-			etk::UString tmpString("<br/>\n"
-			                       "<font color=\"red\">\n"
-			                       "	<b>\n"
-			                       "		edn - Editeur De N'ours\n"
-			                       "	</b>\n"
-			                       "</font>\n"
-			                       "<br/>\n"
-			                       "<br/>\n"
-			                       "<font color=\"indigo\">\n"
-			                       "	<i>\n"
-			                       "		No Buffer Availlable to display\n"
-			                       "	</i>\n"
-			                       "</font>\n");
-			m_displayText.SetPos(vec3(0.0f, m_size.y(), 0.0f) );
-			m_displayText.ForceLineReturn();
-			m_displayText.PrintDecorated(tmpString);
-		} else {
-			// real display ...
-			etk::Buffer& buf = m_buffer->GetData();
-			m_displayText.SetColor(etk::Color<>(0, 0, 0, 256));
-			float countNbLine = 1;
-			float countColomn = 0;
-			vec3 tmpLetterSize = m_displayText.CalculateSize((uniChar_t)'A');
-			
-			for (int32_t iii=0; iii<buf.Size(); ++iii) {
-				char c = buf.Get(iii);
-				etk::UniChar myChar(c);
-				if (myChar == etk::UniChar('\n')) {
-					countNbLine += 1;
-					countColomn = 0;
-					continue;
-				}
-				countColomn += 1;
-				m_displayText.SetPos(vec3(countColomn*tmpLetterSize.x(),
-				                          m_size.y() - countNbLine*tmpLetterSize.y(),
-				                          0.0f) );
-				m_displayText.Print(myChar);
-				//tmpLetterSize.x();
-			}
-		}
+	if (false == NeedRedraw()) {
+		return;
+	}
+	// For the scrooling windows
+	CalculateMaxSize();
+	m_displayDrawing.Clear();
+	m_displayText.Clear();
+	
+	// Reset the background :
+	m_displayDrawing.SetPos(vec3(0, 0, 0));
+	m_displayDrawing.SetColor(etk::Color<>(220, 220, 220, 256));
+	m_displayDrawing.RectangleWidth(m_size);
+	
+	if (m_buffer == NULL) {
+		m_displayText.SetTextAlignement(10, m_size.x()-20, ewol::Text::alignLeft);
+		m_displayText.SetRelPos(vec3(10, 0, 0));
+		etk::UString tmpString("<br/>\n"
+		                       "<font color=\"red\">\n"
+		                       "	<b>\n"
+		                       "		edn - Editeur De N'ours\n"
+		                       "	</b>\n"
+		                       "</font>\n"
+		                       "<br/>\n"
+		                       "<br/>\n"
+		                       "<font color=\"indigo\">\n"
+		                       "	<i>\n"
+		                       "		No Buffer Availlable to display\n"
+		                       "	</i>\n"
+		                       "</font>\n");
+		m_displayText.SetPos(vec3(0.0f, m_size.y(), 0.0f) );
+		m_displayText.ForceLineReturn();
+		m_displayText.PrintDecorated(tmpString);
 		// call the herited class...
 		WidgetScrooled::OnRegenerateDisplay();
+		return;
 	}
+	// normal displa of the buffer :
+	vec3 tmpCursorPosition(0, 0, -1);
+	// real display ...
+	etk::Buffer& buf = m_buffer->GetData();
+	m_displayText.SetColor(etk::Color<>(0, 0, 0, 256));
+	float countNbLine = 1;
+	esize_t countColomn = 0;
+	vec3 tmpLetterSize = m_displayText.CalculateSize((uniChar_t)'A');
+	vec3 positionCurentDisplay(0.0f, m_size.y()-tmpLetterSize.y(), 0.0f);
+	m_displayText.SetPos(positionCurentDisplay);
+	// the siplay string :
+	etk::UString stringToDisplay;
+	esize_t bufferElementSize = 0;
+	etk::UniChar currentValue;
+	for (int32_t iii=0; iii<buf.Size(); iii+=bufferElementSize) {
+		if (iii==m_buffer->m_cursorPos) {
+			// need to display the cursor :
+			tmpCursorPosition = positionCurentDisplay;
+		}
+		bufferElementSize = Get(iii, currentValue, unicode::EDN_CHARSET_UTF8);
+		//APPL_DEBUG(" element size : " << iii << " : " << bufferElementSize);
+		if (currentValue == etk::UniChar::Return) {
+			countNbLine += 1;
+			countColomn = 0;
+			if (bufferElementSize ==0) {
+				bufferElementSize = 1;
+			}
+			positionCurentDisplay.setX(0);
+			positionCurentDisplay.setY(positionCurentDisplay.y()-tmpLetterSize.y());
+			m_displayText.SetPos(positionCurentDisplay);
+			continue;
+		}
+		appl::TextViewer::Expand(countColomn, currentValue, stringToDisplay);
+		//m_displayText.SetPos(positionCurentDisplay);
+		for (esize_t kkk=0; kkk<stringToDisplay.Size(); ++kkk) {
+			m_displayText.Print(stringToDisplay[kkk]);
+		}
+		positionCurentDisplay.setX(positionCurentDisplay.x()+tmpLetterSize.x()*(float)stringToDisplay.Size());
+		countColomn += stringToDisplay.Size();
+		
+		if (bufferElementSize ==0) {
+			bufferElementSize = 1;
+		}
+	}
+	if (tmpCursorPosition.z()!=-1) {
+		// display the cursor:
+		APPL_DEBUG("display cursor at position : " << tmpCursorPosition);
+		m_displayText.SetPos(tmpCursorPosition);
+		m_displayText.SetColor(etk::Color<>(0xFF0000FF));
+		m_displayText.SetColorBg(etk::Color<>(0xFF0000FF));
+		m_displayText.PrintCursor(m_insertMode);
+	}
+	// call the herited class...
+	WidgetScrooled::OnRegenerateDisplay();
 }
 
 
 bool appl::TextViewer::OnEventEntry(const ewol::EventEntry& _event)
 {
-	if (_event.GetType() == ewol::keyEvent::keyboardChar) {
-		//APPL_DEBUG("KB EVENT : \"" << UTF8_data << "\" size=" << strlen(UTF8_data) << "type=" << (int32_t)typeEvent);
-		if (_event.GetStatus() == ewol::keyEvent::statusDown) {
-			if (m_buffer != NULL) {
-				//tmpBuffer->AddChar(_event.GetChar());
-			}
-			MarkToRedraw();
-		}
+	if (m_buffer == NULL) {
+		return false;
+	}
+	if (m_buffer->OnEventEntry(_event) == true) {
+		MarkToRedraw();
 		return true;
 	}
-	// move events ...
-	if (_event.GetStatus() == ewol::keyEvent::statusDown) {
-		if (m_buffer != NULL) {
-			//tmpBuffer->cursorMove(_event.GetType());
-		}
-		MarkToRedraw();
+	return false;
+}
+
+
+bool appl::TextViewer::OnEventInput(const ewol::EventInput& _event)
+{
+	vec2 relativePos = RelativePosition(_event.GetPos());
+	if (m_buffer != NULL) {
+		
 	}
+	GetFocus();
 	return true;
 }
 
@@ -201,15 +286,6 @@ void appl::TextViewer::OnEventClipboard(ewol::clipBoard::clipboardListe_te _clip
 	MarkToRedraw();
 }
 
-bool appl::TextViewer::OnEventInput(const ewol::EventInput& _event)
-{
-	vec2 relativePos = RelativePosition(_event.GetPos());
-	if (m_buffer != NULL) {
-		
-	}
-	return true;
-}
-
 void appl::TextViewer::OnReceiveMessage(const ewol::EMessage& _msg)
 {
 	// Force redraw of the widget
diff --git a/sources/appl/Gui/TextViewer.h b/sources/appl/Gui/TextViewer.h
index 9e5739d..e362032 100644
--- a/sources/appl/Gui/TextViewer.h
+++ b/sources/appl/Gui/TextViewer.h
@@ -26,10 +26,9 @@ namespace appl
 			TextViewer(const etk::UString& _fontName="", int32_t _fontSize=-1);
 			virtual ~TextViewer(void);
 		private:
-			appl::Buffer* m_buffer;
-			// drawing elements :
-			ewol::Text m_displayText;
-			ewol::Drawing m_displayDrawing;
+			appl::Buffer* m_buffer; //!< pointer on the current buffer to display (can be null if the buffer is remover or in state of changing buffer)
+			ewol::Text m_displayText; //!< Text display properties.
+			ewol::Drawing m_displayDrawing; //!< Other diaplay requested.
 		public:
 			void SetFontSize(int32_t _size);
 			void SetFontName(const etk::UString& _fontName);
@@ -47,6 +46,24 @@ namespace appl
 			virtual void OnEventClipboard(ewol::clipBoard::clipboardListe_te clipboardID);
 			virtual void OnGetFocus(void);
 			virtual void OnLostFocus(void);
+		private:
+			/**
+			 * @brief Get the next element in the buffer.
+			 * @param[in] _pos Position in the buffer
+			 * @param[out] _value Unicode value read in the buffer
+			 * @param[in] _charset Charset used to parse the current buffer
+			 * @return number ofelement read in the buffer (to increment the position)
+			 */
+			esize_t Get(esize_t _pos, etk::UniChar& _value, unicode::charset_te _charset) const;
+			/**
+			 * @brief Expand the specify char to have a user frendly display for special char and tabs
+			 * @param[in] _indent Curent indentation in the line
+			 * @param[in] _value Current value to transform
+			 * @param[out] _out String that represent the curent value to display
+			 */
+			void Expand(esize_t& _indent, const etk::UniChar& _value, etk::UString& _out) const;
+		private:
+			bool m_insertMode; //!< the insert mode is enable
 	};
 };