From f4ade875a3516eaa9f1a32e92fd18ef5b6cf9205 Mon Sep 17 00:00:00 2001
From: Nimetu <nimetu@gmail.com>
Date: Sat, 19 Jan 2019 22:26:36 +0200
Subject: [PATCH] Added: CViewText centered text mode option.

--HG--
branch : develop
---
 code/nel/include/nel/gui/view_text.h |  2 +-
 code/nel/src/gui/view_text.cpp       | 27 +++++++++++++++++++++++++--
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/code/nel/include/nel/gui/view_text.h b/code/nel/include/nel/gui/view_text.h
index 5fe86dee5..195db5a62 100644
--- a/code/nel/include/nel/gui/view_text.h
+++ b/code/nel/include/nel/gui/view_text.h
@@ -37,7 +37,7 @@ namespace NLGUI
 	class CViewText : public CViewBase
 	{
 	public:
-		enum TTextMode { ClipWord, DontClipWord, Justified };
+		enum TTextMode { ClipWord, DontClipWord, Justified, Centered };
 	public:
 
 		DECLARE_UI_CLASS(CViewText)
diff --git a/code/nel/src/gui/view_text.cpp b/code/nel/src/gui/view_text.cpp
index e991d8170..d04d3df2e 100644
--- a/code/nel/src/gui/view_text.cpp
+++ b/code/nel/src/gui/view_text.cpp
@@ -312,6 +312,9 @@ namespace NLGUI
 			case Justified:
 				return "justified";
 				break;
+
+			case Centered:
+				return "centered";
 			}
 
 			return "";
@@ -522,6 +525,9 @@ namespace NLGUI
 			else
 			if( value == "justified" )
 				_TextMode = Justified;
+			else
+			if( value == "centered" )
+				_TextMode = Centered;
 
 			return true;
 		}
@@ -716,6 +722,10 @@ namespace NLGUI
 		case Justified:
 			just = "justified";
 			break;
+
+		case Centered:
+			just = "centered";
+			break;
 		}
 		
 		xmlSetProp( node, BAD_CAST "justification", BAD_CAST just.c_str() );
@@ -843,6 +853,7 @@ namespace NLGUI
 			if (nlstricmp("clip_word", (const char *) prop) == 0)            _TextMode = ClipWord;
 			else if (nlstricmp("dont_clip_word", (const char *) prop) == 0)  _TextMode = DontClipWord;
 			else if (nlstricmp("justified", (const char *) prop) == 0)       _TextMode = Justified;
+			else if (nlstricmp("centered", (const char *) prop) == 0)        _TextMode = Centered;
 			else nlwarning("<CViewText::parse> bad text mode");
 		}
 
@@ -1195,7 +1206,18 @@ namespace NLGUI
 			{
 				CLine &currLine = *_Lines[i];
 				// current x position
-				float px = (float) (_XReal * _Scale + ((i==0) ? (sint)_FirstLineX : 0));
+				float px = (float) (_XReal * _Scale + ((i==0) ? _FirstLineX : 0.f));
+
+				// Center line to computed maximum line width (_WReal)
+				//
+				// Does not give most accurate result when _WReal is much smaller than parent,
+				// but _WReal also defines mouseover hotspot/tooltip area.
+				//
+				// May not work correctly in CGroupParagraph (multiple text elements).
+				//
+				if (_TextMode == Centered)
+					px += (float)(_WReal * _Scale - (currLine.getWidth() + (i == 0 ? _FirstLineX : 0.f)) )/ 2.f;
+
 				// draw each words of the line
 				for(uint k = 0; k < currLine.getNumWords(); ++k)
 				{
@@ -2039,6 +2061,7 @@ namespace NLGUI
 			switch(_TextMode)
 			{
 				case ClipWord: updateTextContextMultiLine(nMaxWidth); break;
+				case Centered: // fallthru to DontClipWord
 				case DontClipWord: updateTextContextMultiLineJustified(nMaxWidth, false); break;
 				case Justified: updateTextContextMultiLineJustified(nMaxWidth, true); break;
 			}
@@ -2869,7 +2892,7 @@ namespace NLGUI
 			return (sint32)ceilf(_FontHeight / _Scale);
 		}
 		// If we can't clip the words, return the size of the largest word
-		else if ((_TextMode == DontClipWord) || (_TextMode == Justified))
+		else if ((_TextMode == DontClipWord) || (_TextMode == Justified) || (_TextMode == Centered))
 		{
 			NL3D::UTextContext *TextContext = CViewRenderer::getTextContext(_FontName);
 			TextContext->setHotSpot (UTextContext::BottomLeft);