SL-20363 Add Advanced option 'Debug Unicode'

11 files changed, 218 insertions, 88 deletions

diff --git a/indra/llcommon/llstring.cpp b/indra/llcommon/llstring.cpp
index 17d69351ec..ab34262515 100644
--- a/indra/llcommon/llstring.cpp
+++ b/indra/llcommon/llstring.cpp
@@ -623,6 +623,7 @@ std::string mbcsstring_makeASCII(const std::string& wstr)
 	}
 	return out_str;
 }
+
 std::string utf8str_removeCRLF(const std::string& utf8str)
 {
 	if (0 == utf8str.length())
@@ -644,6 +645,54 @@ std::string utf8str_removeCRLF(const std::string& utf8str)
 	return out;
 }
 
+std::string utf8str_showBytesUTF8(const std::string& utf8str)
+{
+    std::string result;
+
+    bool in_sequence = false;
+    for (U8 byte : utf8str)
+    {
+        if (byte >= 0x80) // Part of an UTF-8 sequence
+        {
+            if (!in_sequence) // Start new UTF-8 sequence
+            {
+                if (!result.empty() && result.back() != ' ')
+                    result += ' '; // Use space as separator between ASCII and UTF-8
+                result += '[';
+            }
+            else if (byte >= 0xC0) // Start another UTF-8 sequence
+            {
+                result += "] ["; // Use space as separator between UTF-8 and UTF-8
+            }
+            else // Continue the same UTF-8 sequence
+            {
+                result += '.';
+            }
+            result += llformat("%02X", byte); // The byte is represented in hexadecimal form
+            in_sequence = true;
+        }
+        else // ASCII symbol is represented as a character
+        {
+            if (in_sequence) // End of UTF-8 sequence
+            {
+                result += ']';
+                if (byte != ' ')
+                {
+                    result += ' '; // Use space as separator between UTF-8 and ASCII
+                }
+            }
+            result += byte;
+            in_sequence = false;
+        }
+    }
+    if (in_sequence) // End of UTF-8 sequence
+    {
+        result += ']';
+    }
+
+    return result;
+}
+
 #if LL_WINDOWS
 unsigned int ll_wstring_default_code_page()
 {
diff --git a/indra/llcommon/llstring.h b/indra/llcommon/llstring.h
index 8def59ed7f..38b9c3e23c 100644
--- a/indra/llcommon/llstring.h
+++ b/indra/llcommon/llstring.h
@@ -743,6 +743,7 @@ LL_COMMON_API std::string mbcsstring_makeASCII(const std::string& str);
 
 LL_COMMON_API std::string utf8str_removeCRLF(const std::string& utf8str);
 
+LL_COMMON_API std::string utf8str_showBytesUTF8(const std::string& utf8str);
 
 #if LL_WINDOWS
 /* @name Windows string helpers
diff --git a/indra/llui/lllineeditor.cpp b/indra/llui/lllineeditor.cpp
index e032b4b8c2..453fa29e7c 100644
--- a/indra/llui/lllineeditor.cpp
+++ b/indra/llui/lllineeditor.cpp
@@ -1739,6 +1739,20 @@ void LLLineEditor::drawBackground()
 	}
 }
 
+//virtual 
+const std::string LLLineEditor::getToolTip() const
+{
+    if (sDebugUnicode)
+    {
+        std::string text = getText();
+        std::string tooltip = utf8str_showBytesUTF8(text);
+        return tooltip;
+    }
+
+    return LLUICtrl::getToolTip();
+}
+
+//virtual 
 void LLLineEditor::draw()
 {
 	F32 alpha = getDrawContext().mAlpha;
diff --git a/indra/llui/lllineeditor.h b/indra/llui/lllineeditor.h
index 69eb0792e1..5794b3c35a 100644
--- a/indra/llui/lllineeditor.h
+++ b/indra/llui/lllineeditor.h
@@ -119,54 +119,55 @@ protected:
 	friend class LLUICtrlFactory;
 	friend class LLFloaterEditUI;
 	void showContextMenu(S32 x, S32 y);
+
 public:
 	virtual ~LLLineEditor();
 
 	// mousehandler overrides
-	/*virtual*/ BOOL	handleMouseDown(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL	handleMouseUp(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL	handleHover(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL	handleDoubleClick(S32 x,S32 y,MASK mask);
-	/*virtual*/ BOOL	handleMiddleMouseDown(S32 x,S32 y,MASK mask);
-	/*virtual*/ BOOL	handleRightMouseDown(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL	handleKeyHere(KEY key, MASK mask );
-	/*virtual*/ BOOL	handleUnicodeCharHere(llwchar uni_char);
-	/*virtual*/ void	onMouseCaptureLost();
+	/*virtual*/ BOOL	handleMouseDown(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL	handleMouseUp(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL	handleHover(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL	handleDoubleClick(S32 x,S32 y,MASK mask) override;
+	/*virtual*/ BOOL	handleMiddleMouseDown(S32 x,S32 y,MASK mask) override;
+	/*virtual*/ BOOL	handleRightMouseDown(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL	handleKeyHere(KEY key, MASK mask) override;
+	/*virtual*/ BOOL	handleUnicodeCharHere(llwchar uni_char) override;
+	/*virtual*/ void	onMouseCaptureLost() override;
 
 	// LLEditMenuHandler overrides
-	virtual void	cut();
-	virtual BOOL	canCut() const;
-	virtual void	copy();
-	virtual BOOL	canCopy() const;
-	virtual void	paste();
-	virtual BOOL	canPaste() const;
+	/*virtual*/ void	cut() override;
+	/*virtual*/ BOOL	canCut() const override;
+	/*virtual*/ void	copy() override;
+	/*virtual*/ BOOL	canCopy() const override;
+	/*virtual*/ void	paste() override;
+	/*virtual*/ BOOL	canPaste() const override;
 
 	virtual void	updatePrimary();
 	virtual void	copyPrimary();
  	virtual void	pastePrimary();
 	virtual BOOL	canPastePrimary() const;
 
-	virtual void	doDelete();
-	virtual BOOL	canDoDelete() const;
+	/*virtual*/ void	doDelete() override;
+	/*virtual*/ BOOL	canDoDelete() const override;
 
-	virtual void	selectAll();
-	virtual BOOL	canSelectAll() const;
+	/*virtual*/ void	selectAll() override;
+	/*virtual*/ BOOL	canSelectAll() const override;
 
-	virtual void	deselect();
-	virtual BOOL	canDeselect() const;
+	/*virtual*/ void	deselect() override;
+	/*virtual*/ BOOL	canDeselect() const override;
 
 	// LLSpellCheckMenuHandler overrides
-	/*virtual*/ bool	getSpellCheck() const;
+	/*virtual*/ bool	getSpellCheck() const override;
 
-	/*virtual*/ const std::string& getSuggestion(U32 index) const;
-	/*virtual*/ U32		getSuggestionCount() const;
-	/*virtual*/ void	replaceWithSuggestion(U32 index);
+	/*virtual*/ const std::string& getSuggestion(U32 index) const override;
+	/*virtual*/ U32		getSuggestionCount() const override;
+	/*virtual*/ void	replaceWithSuggestion(U32 index) override;
 
-	/*virtual*/ void	addToDictionary();
-	/*virtual*/ bool	canAddToDictionary() const;
+	/*virtual*/ void	addToDictionary() override;
+	/*virtual*/ bool	canAddToDictionary() const override;
 
-	/*virtual*/ void	addToIgnore();
-	/*virtual*/ bool	canAddToIgnore() const;
+	/*virtual*/ void	addToIgnore() override;
+	/*virtual*/ bool	canAddToIgnore() const override;
 
 	// Spell checking helper functions
 	std::string			getMisspelledWord(U32 pos) const;
@@ -174,27 +175,28 @@ public:
 	void				onSpellCheckSettingsChange();
 
 	// view overrides
-	virtual void	draw();
-	virtual void	reshape(S32 width,S32 height,BOOL called_from_parent=TRUE);
-	virtual void	onFocusReceived();
-	virtual void	onFocusLost();
-	virtual void	setEnabled(BOOL enabled);
+	/*virtual*/ const std::string getToolTip() const override;
+	/*virtual*/ void	draw() override;
+	/*virtual*/ void	reshape(S32 width, S32 height, BOOL called_from_parent = TRUE) override;
+	/*virtual*/ void	onFocusReceived() override;
+	/*virtual*/ void	onFocusLost() override;
+	/*virtual*/ void	setEnabled(BOOL enabled) override;
 
 	// UI control overrides
-	virtual void	clear();
-	virtual void	onTabInto();
-	virtual void	setFocus( BOOL b );
-	virtual void 	setRect(const LLRect& rect);
-	virtual BOOL	acceptsTextInput() const;
-	virtual void	onCommit();
-	virtual BOOL	isDirty() const;	// Returns TRUE if user changed value at all
-	virtual void	resetDirty();		// Clear dirty state
+	/*virtual*/ void	clear() override;
+	/*virtual*/ void	onTabInto() override;
+	/*virtual*/ void	setFocus(BOOL b) override;
+	/*virtual*/ void 	setRect(const LLRect& rect) override;
+	/*virtual*/ BOOL	acceptsTextInput() const override;
+	/*virtual*/ void	onCommit() override;
+	/*virtual*/ BOOL	isDirty() const override;	// Returns TRUE if user changed value at all
+	/*virtual*/ void	resetDirty() override;		// Clear dirty state
 
 	// assumes UTF8 text
-	virtual void	setValue(const LLSD& value );
-	virtual LLSD	getValue() const;
-	virtual BOOL	setTextArg( const std::string& key, const LLStringExplicit& text );
-	virtual BOOL	setLabelArg( const std::string& key, const LLStringExplicit& text );
+	/*virtual*/ void	setValue(const LLSD& value) override;
+	/*virtual*/ LLSD	getValue() const override;
+	/*virtual*/ BOOL	setTextArg(const std::string& key, const LLStringExplicit& text) override;
+	/*virtual*/ BOOL	setLabelArg(const std::string& key, const LLStringExplicit& text) override;
 
 	void			setLabel(const LLStringExplicit &new_label) { mLabel = new_label; }
 	const std::string& 	getLabel()	{ return mLabel.getString(); }
@@ -216,7 +218,7 @@ public:
 
 	// Selects characters 'start' to 'end'.
 	void			setSelection(S32 start, S32 end);
-	virtual void	getSelectionRange(S32 *position, S32 *length) const;
+	/*virtual*/ void	getSelectionRange(S32 *position, S32 *length) const override;
 	
 	void			setCommitOnFocusLost( BOOL b )	{ mCommitOnFocusLost = b; }
 	void			setRevertOnEsc( BOOL b )		{ mRevertOnEsc = b; }
@@ -315,14 +317,14 @@ public:
 	void			updateAllowingLanguageInput();
 	BOOL			hasPreeditString() const;
 	// Implementation (overrides) of LLPreeditor
-	virtual void	resetPreedit();
-	virtual void	updatePreedit(const LLWString &preedit_string,
-						const segment_lengths_t &preedit_segment_lengths, const standouts_t &preedit_standouts, S32 caret_position);
-	virtual void	markAsPreedit(S32 position, S32 length);
-	virtual void	getPreeditRange(S32 *position, S32 *length) const;
-	virtual BOOL	getPreeditLocation(S32 query_position, LLCoordGL *coord, LLRect *bounds, LLRect *control) const;
-	virtual S32		getPreeditFontSize() const;
-	virtual LLWString getPreeditString() const { return getWText(); }
+	/*virtual*/ void	resetPreedit() override;
+	/*virtual*/ void	updatePreedit(const LLWString &preedit_string,
+						const segment_lengths_t &preedit_segment_lengths, const standouts_t &preedit_standouts, S32 caret_position) override;
+	/*virtual*/ void	markAsPreedit(S32 position, S32 length) override;
+	/*virtual*/ void	getPreeditRange(S32 *position, S32 *length) const override;
+	/*virtual*/ BOOL	getPreeditLocation(S32 query_position, LLCoordGL *coord, LLRect *bounds, LLRect *control) const override;
+	/*virtual*/ S32		getPreeditFontSize() const override;
+	/*virtual*/ LLWString getPreeditString() const override { return getWText(); }
 
     void			setText(const LLStringExplicit &new_text, bool use_size_limit);
 
diff --git a/indra/llui/lltextbase.cpp b/indra/llui/lltextbase.cpp
index 8f628b4818..7ccf025a19 100644
--- a/indra/llui/lltextbase.cpp
+++ b/indra/llui/lltextbase.cpp
@@ -1107,6 +1107,7 @@ void LLTextBase::insertSegment(LLTextSegmentPtr segment_to_insert)
 	needsReflow(reflow_start_index);
 }
 
+//virtual 
 BOOL LLTextBase::handleMouseDown(S32 x, S32 y, MASK mask)
 {
 	// handle triple click
@@ -1161,6 +1162,7 @@ BOOL LLTextBase::handleMouseDown(S32 x, S32 y, MASK mask)
 	return LLUICtrl::handleMouseDown(x, y, mask);
 }
 
+//virtual 
 BOOL LLTextBase::handleMouseUp(S32 x, S32 y, MASK mask)
 {
 	LLTextSegmentPtr cur_segment = getSegmentAtLocalPos(x, y);
@@ -1180,6 +1182,7 @@ BOOL LLTextBase::handleMouseUp(S32 x, S32 y, MASK mask)
 	return LLUICtrl::handleMouseUp(x, y, mask);
 }
 
+//virtual 
 BOOL LLTextBase::handleMiddleMouseDown(S32 x, S32 y, MASK mask)
 {
 	LLTextSegmentPtr cur_segment = getSegmentAtLocalPos(x, y);
@@ -1191,6 +1194,7 @@ BOOL LLTextBase::handleMiddleMouseDown(S32 x, S32 y, MASK mask)
 	return LLUICtrl::handleMiddleMouseDown(x, y, mask);
 }
 
+//virtual 
 BOOL LLTextBase::handleMiddleMouseUp(S32 x, S32 y, MASK mask)
 {
 	LLTextSegmentPtr cur_segment = getSegmentAtLocalPos(x, y);
@@ -1202,6 +1206,7 @@ BOOL LLTextBase::handleMiddleMouseUp(S32 x, S32 y, MASK mask)
 	return LLUICtrl::handleMiddleMouseUp(x, y, mask);
 }
 
+//virtual 
 BOOL LLTextBase::handleRightMouseDown(S32 x, S32 y, MASK mask)
 {
 	LLTextSegmentPtr cur_segment = getSegmentAtLocalPos(x, y);
@@ -1213,6 +1218,7 @@ BOOL LLTextBase::handleRightMouseDown(S32 x, S32 y, MASK mask)
 	return LLUICtrl::handleRightMouseDown(x, y, mask);
 }
 
+//virtual 
 BOOL LLTextBase::handleRightMouseUp(S32 x, S32 y, MASK mask)
 {
 	LLTextSegmentPtr cur_segment = getSegmentAtLocalPos(x, y);
@@ -1224,6 +1230,7 @@ BOOL LLTextBase::handleRightMouseUp(S32 x, S32 y, MASK mask)
 	return LLUICtrl::handleRightMouseUp(x, y, mask);
 }
 
+//virtual 
 BOOL LLTextBase::handleDoubleClick(S32 x, S32 y, MASK mask)
 {
 	//Don't start triple click timer if user have clicked on scrollbar
@@ -1243,6 +1250,7 @@ BOOL LLTextBase::handleDoubleClick(S32 x, S32 y, MASK mask)
 	return LLUICtrl::handleDoubleClick(x, y, mask);
 }
 
+//virtual 
 BOOL LLTextBase::handleHover(S32 x, S32 y, MASK mask)
 {
 	LLTextSegmentPtr cur_segment = getSegmentAtLocalPos(x, y);
@@ -1254,6 +1262,7 @@ BOOL LLTextBase::handleHover(S32 x, S32 y, MASK mask)
 	return LLUICtrl::handleHover(x, y, mask);
 }
 
+//virtual 
 BOOL LLTextBase::handleScrollWheel(S32 x, S32 y, S32 clicks)
 {
 	LLTextSegmentPtr cur_segment = getSegmentAtLocalPos(x, y);
@@ -1265,6 +1274,7 @@ BOOL LLTextBase::handleScrollWheel(S32 x, S32 y, S32 clicks)
 	return LLUICtrl::handleScrollWheel(x, y, clicks);
 }
 
+//virtual 
 BOOL LLTextBase::handleToolTip(S32 x, S32 y, MASK mask)
 {
 	LLTextSegmentPtr cur_segment = getSegmentAtLocalPos(x, y);
@@ -1276,7 +1286,20 @@ BOOL LLTextBase::handleToolTip(S32 x, S32 y, MASK mask)
 	return LLUICtrl::handleToolTip(x, y, mask);
 }
 
+//virtual 
+const std::string LLTextBase::getToolTip() const
+{
+    if (sDebugUnicode)
+    {
+        std::string text = getText();
+        std::string tooltip = utf8str_showBytesUTF8(text);
+        return tooltip;
+    }
 
+    return LLUICtrl::getToolTip();
+}
+
+//virtual 
 void LLTextBase::reshape(S32 width, S32 height, BOOL called_from_parent)
 {
 	if (width != getRect().getWidth() || height != getRect().getHeight() || LLView::sForceReshape)
@@ -1303,6 +1326,7 @@ void LLTextBase::reshape(S32 width, S32 height, BOOL called_from_parent)
 	}
 }
 
+//virtual 
 void LLTextBase::draw()
 {
 	// reflow if needed, on demand
diff --git a/indra/llui/lltextbase.h b/indra/llui/lltextbase.h
index 37ab798a1d..9d3c54fbee 100644
--- a/indra/llui/lltextbase.h
+++ b/indra/llui/lltextbase.h
@@ -285,7 +285,7 @@ typedef LLPointer<LLTextSegment> LLTextSegmentPtr;
 /// as LLTextEditor and LLTextBox. It implements shared functionality
 /// such as Url highlighting and opening.
 ///
-class LLTextBase 
+class LLTextBase
 :	public LLUICtrl,
 	protected LLEditMenuHandler,
 	public LLSpellCheckMenuHandler,
@@ -354,51 +354,52 @@ public:
 	};
 
 	// LLMouseHandler interface
-	/*virtual*/ BOOL		handleMouseDown(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL		handleMouseUp(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL		handleMiddleMouseDown(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL		handleMiddleMouseUp(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL		handleRightMouseDown(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL		handleRightMouseUp(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL		handleDoubleClick(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL		handleHover(S32 x, S32 y, MASK mask);
-	/*virtual*/ BOOL		handleScrollWheel(S32 x, S32 y, S32 clicks);
-	/*virtual*/ BOOL		handleToolTip(S32 x, S32 y, MASK mask);
+	/*virtual*/ BOOL		handleMouseDown(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL		handleMouseUp(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL		handleMiddleMouseDown(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL		handleMiddleMouseUp(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL		handleRightMouseDown(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL		handleRightMouseUp(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL		handleDoubleClick(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL		handleHover(S32 x, S32 y, MASK mask) override;
+	/*virtual*/ BOOL		handleScrollWheel(S32 x, S32 y, S32 clicks) override;
+	/*virtual*/ BOOL		handleToolTip(S32 x, S32 y, MASK mask) override;
 
 	// LLView interface
-	/*virtual*/ void		reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
-	/*virtual*/ void		draw();
+	/*virtual*/ const std::string getToolTip() const override;
+	/*virtual*/ void		reshape(S32 width, S32 height, BOOL called_from_parent = TRUE) override;
+	/*virtual*/ void		draw() override;
 
 	// LLUICtrl interface
-	/*virtual*/ BOOL		acceptsTextInput() const { return !mReadOnly; }
-	/*virtual*/ void		setColor( const LLColor4& c );
+	/*virtual*/ BOOL		acceptsTextInput() const override { return !mReadOnly; }
+	/*virtual*/ void		setColor(const LLColor4& c) override;
 	virtual     void 		setReadOnlyColor(const LLColor4 &c);
-	virtual	    void		onVisibilityChange( BOOL new_visibility );
+	/*virtual*/ void		onVisibilityChange(BOOL new_visibility) override;
 
-	/*virtual*/ void		setValue(const LLSD& value );
-	/*virtual*/ LLTextViewModel* getViewModel() const;
+	/*virtual*/ void		setValue(const LLSD& value) override;
+	/*virtual*/ LLTextViewModel* getViewModel() const override;
 
 	// LLEditMenuHandler interface
-	/*virtual*/ BOOL		canDeselect() const;
-	/*virtual*/ void		deselect();
+	/*virtual*/ BOOL		canDeselect() const override;
+	/*virtual*/ void		deselect() override;
 
-	virtual void	onFocusReceived();
-	virtual void	onFocusLost();
+	virtual void	onFocusReceived() override;
+	virtual void	onFocusLost() override;
 
     void        setParseHTML(bool parse_html) { mParseHTML = parse_html; }
 
 	// LLSpellCheckMenuHandler overrides
-	/*virtual*/ bool		getSpellCheck() const;
+	/*virtual*/ bool		getSpellCheck() const override;
 
-	/*virtual*/ const std::string& getSuggestion(U32 index) const;
-	/*virtual*/ U32			getSuggestionCount() const;
-	/*virtual*/ void		replaceWithSuggestion(U32 index);
+	/*virtual*/ const std::string& getSuggestion(U32 index) const override;
+	/*virtual*/ U32			getSuggestionCount() const override;
+	/*virtual*/ void		replaceWithSuggestion(U32 index) override;
 
-	/*virtual*/ void		addToDictionary();
-	/*virtual*/ bool		canAddToDictionary() const;
+	/*virtual*/ void		addToDictionary() override;
+	/*virtual*/ bool		canAddToDictionary() const override;
 
-	/*virtual*/ void		addToIgnore();
-	/*virtual*/ bool		canAddToIgnore() const;
+	/*virtual*/ void		addToIgnore() override;
+	/*virtual*/ bool		canAddToIgnore() const override;
 
 	// Spell checking helper functions
 	std::string				getMisspelledWord(U32 pos) const;
@@ -432,7 +433,7 @@ public:
 	void					appendText(const std::string &new_text, bool prepend_newline, const LLStyle::Params& input_params = LLStyle::Params());
 
 	void					setLabel(const LLStringExplicit& label);
-	virtual BOOL			setLabelArg(const std::string& key, const LLStringExplicit& text );
+	/*virtual*/ BOOL		setLabelArg(const std::string& key, const LLStringExplicit& text) override;
 
 	const	std::string& 	getLabel()	{ return mLabel.getString(); }
 	const	LLWString&		getWlabel() { return mLabel.getWString();}
@@ -649,7 +650,8 @@ protected:
 	S32 normalizeUri(std::string& uri);
 	
 protected:
-	virtual std::string _getSearchText() const
+	// virtual
+	std::string _getSearchText() const override
 	{
 		return mLabel.getString() + getToolTip();
 	}
diff --git a/indra/llui/llview.cpp b/indra/llui/llview.cpp
index 0afccef735..139eb17efa 100644
--- a/indra/llui/llview.cpp
+++ b/indra/llui/llview.cpp
@@ -60,6 +60,7 @@ static const S32 LINE_HEIGHT = 15;
 
 S32		LLView::sDepth = 0;
 bool	LLView::sDebugRects = false;
+bool	LLView::sDebugUnicode = false;
 bool	LLView::sIsRectDirty = false;
 LLRect	LLView::sDirtyRect;
 bool	LLView::sDebugRectsShowNames = true;
diff --git a/indra/llui/llview.h b/indra/llui/llview.h
index b498451dce..6e16d41cba 100644
--- a/indra/llui/llview.h
+++ b/indra/llui/llview.h
@@ -659,6 +659,9 @@ public:
 	// Draw debug rectangles around widgets to help with alignment and spacing
 	static bool	sDebugRects;
 
+	// Show hexadecimal byte values of unicode symbols in a tooltip
+	static bool	sDebugUnicode;
+
 	static bool sIsRectDirty;
 	static LLRect sDirtyRect;
 
diff --git a/indra/newview/llviewermenu.cpp b/indra/newview/llviewermenu.cpp
index 8419555445..2cf341f87f 100644
--- a/indra/newview/llviewermenu.cpp
+++ b/indra/newview/llviewermenu.cpp
@@ -1437,6 +1437,30 @@ class LLAdvancedCheckDebugViews : public view_listener_t
 
 
 
+///////////////////
+// DEBUG UNICODE //
+///////////////////
+
+
+class LLAdvancedToggleDebugUnicode : public view_listener_t
+{
+	bool handleEvent(const LLSD& userdata)
+	{
+		LLView::sDebugUnicode = !(LLView::sDebugUnicode);
+		return true;
+	}
+};
+
+class LLAdvancedCheckDebugUnicode : public view_listener_t
+{
+	bool handleEvent(const LLSD& userdata)
+	{
+		return LLView::sDebugUnicode;
+	}
+};
+
+
+
 ///////////////////////
 // XUI NAME TOOLTIPS //
 ///////////////////////
@@ -9509,6 +9533,8 @@ void initialize_menus()
 	view_listener_t::addMenu(new LLAdvancedCheckDebugClicks(), "Advanced.CheckDebugClicks");
 	view_listener_t::addMenu(new LLAdvancedCheckDebugViews(), "Advanced.CheckDebugViews");
 	view_listener_t::addMenu(new LLAdvancedToggleDebugViews(), "Advanced.ToggleDebugViews");
+	view_listener_t::addMenu(new LLAdvancedCheckDebugUnicode(), "Advanced.CheckDebugUnicode");
+	view_listener_t::addMenu(new LLAdvancedToggleDebugUnicode(), "Advanced.ToggleDebugUnicode");
 	view_listener_t::addMenu(new LLAdvancedToggleXUINameTooltips(), "Advanced.ToggleXUINameTooltips");
 	view_listener_t::addMenu(new LLAdvancedCheckXUINameTooltips(), "Advanced.CheckXUINameTooltips");
 	view_listener_t::addMenu(new LLAdvancedToggleDebugMouseEvents(), "Advanced.ToggleDebugMouseEvents");
diff --git a/indra/newview/skins/default/xui/en/floater_im_session.xml b/indra/newview/skins/default/xui/en/floater_im_session.xml
index c3e002e97d..1b6bc7025a 100644
--- a/indra/newview/skins/default/xui/en/floater_im_session.xml
+++ b/indra/newview/skins/default/xui/en/floater_im_session.xml
@@ -288,7 +288,7 @@
                          expand_lines_count="5"
                          follows="left|right|bottom"
                          font="SansSerifSmall"
-                         height="20"    
+                         height="20"
                          is_expandable="true"
                          text_tentative_color="TextFgTentativeColor"
                          bg_writeable_color="ScriptBackground"
diff --git a/indra/newview/skins/default/xui/en/menu_viewer.xml b/indra/newview/skins/default/xui/en/menu_viewer.xml
index 171c0f4f6d..38763cd9a8 100644
--- a/indra/newview/skins/default/xui/en/menu_viewer.xml
+++ b/indra/newview/skins/default/xui/en/menu_viewer.xml
@@ -3611,6 +3611,14 @@ function="World.EnvPreset"
                  function="Advanced.ToggleDebugViews" />
             </menu_item_check>
             <menu_item_check
+             label="Debug Unicode"
+             name="Debug Unicode">
+                <menu_item_check.on_check
+                 function="Advanced.CheckDebugUnicode" />
+                <menu_item_check.on_click
+                 function="Advanced.ToggleDebugUnicode" />
+            </menu_item_check>
+            <menu_item_check
              label="Debug Name Tooltips"
              name="Debug Name Tooltips">
                 <menu_item_check.on_check