From a39810a9c51333bac6f71972b218c7d61fcbc91f Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Fri, 8 Jan 2016 11:25:50 +0800
Subject: [PATCH] text render fixed when having text blocks that contain only
 spaces

---
 Telegram/SourceFiles/gui/text.cpp | 47 +++++++++++++++----------------
 Telegram/SourceFiles/history.cpp  |  2 +-
 2 files changed, 23 insertions(+), 26 deletions(-)

diff --git a/Telegram/SourceFiles/gui/text.cpp b/Telegram/SourceFiles/gui/text.cpp
index ac47b58e4d..328762ab26 100644
--- a/Telegram/SourceFiles/gui/text.cpp
+++ b/Telegram/SourceFiles/gui/text.cpp
@@ -1111,6 +1111,15 @@ public:
 
 			if (_btype == TextBlockTText) {
 				TextBlock *t = static_cast<TextBlock*>(b);
+				if (t->_words.isEmpty()) { // no words in this block, spaces only => layout this block in the same line
+					last_rPadding += lpadding;
+
+					_lineHeight = qMax(_lineHeight, blockHeight);
+
+					longWordLine = false;
+					continue;
+				}
+
 				QFixed f_wLeft = _wLeft; // vars for saving state of the last word start
 				int32 f_lineHeight = _lineHeight; // f points to the last word-start element of t->_words
 				for (TextBlock::TextWords::const_iterator j = t->_words.cbegin(), en = t->_words.cend(), f = j; j != en; ++j) {
@@ -1166,28 +1175,6 @@ public:
 					f_wLeft = _wLeft;
 					f_lineHeight = _lineHeight;
 				}
-				if (lpadding > 0) { // no words in this block, spaces only
-					int32 elidedLineHeight = qMax(_lineHeight, blockHeight);
-					bool elidedLine = _elideLast && (_y + elidedLineHeight >= _yToElide);
-					if (elidedLine) {
-						_lineHeight = elidedLineHeight;
-					}
-					ushort nextStart = _blockEnd(_t, i, e);
-					if (!drawLine(nextStart, i + 1, e)) return;
-					_y += _lineHeight;
-					_lineHeight = qMax(0, blockHeight);
-					_lineStart = nextStart;
-					_lineStartBlock = blockIndex + 1;
-
-					last_rBearing = _rb;
-					last_rPadding = b->rpadding();
-					_wLeft = _w;
-					if (_elideLast && _elideRemoveFromEnd > 0 && (_y + blockHeight >= _yToElide)) {
-						_wLeft -= _elideRemoveFromEnd;
-					}
-
-					longWordLine = true;
-				}
 				continue;
 			}
 
@@ -2762,8 +2749,8 @@ int32 Text::countHeight(int32 w) const {
 			longWordLine = true;
 			continue;
 		}
-		widthLeft -= b->f_lpadding();
-		QFixed newWidthLeft = widthLeft - last_rBearing - (last_rPadding + b->f_width() - _rb);
+		QFixed lpadding = b->f_lpadding();
+		QFixed newWidthLeft = widthLeft - lpadding - last_rBearing - (last_rPadding + b->f_width() - _rb);
 		if (newWidthLeft >= 0) {
 			last_rBearing = _rb;
 			last_rPadding = b->f_rpadding();
@@ -2777,13 +2764,23 @@ int32 Text::countHeight(int32 w) const {
 
 		if (_btype == TextBlockTText) {
 			TextBlock *t = static_cast<TextBlock*>(b);
+			if (t->_words.isEmpty()) { // no words in this block, spaces only => layout this block in the same line
+				last_rPadding += lpadding;
+
+				lineHeight = qMax(lineHeight, blockHeight);
+
+				longWordLine = false;
+				continue;
+			}
+
 			QFixed f_wLeft = widthLeft;
 			int32 f_lineHeight = lineHeight;
 			for (TextBlock::TextWords::const_iterator j = t->_words.cbegin(), e = t->_words.cend(), f = j; j != e; ++j) {
 				bool wordEndsHere = (j->width >= 0);
 				QFixed j_width = wordEndsHere ? j->width : -j->width;
 
-				QFixed newWidthLeft = widthLeft - last_rBearing - (last_rPadding + j_width - j->f_rbearing());
+				QFixed newWidthLeft = widthLeft - lpadding - last_rBearing - (last_rPadding + j_width - j->f_rbearing());
+				lpadding = 0;
 				if (newWidthLeft >= 0) {
 					last_rBearing = j->f_rbearing();
 					last_rPadding = j->rpadding;
diff --git a/Telegram/SourceFiles/history.cpp b/Telegram/SourceFiles/history.cpp
index 2cc47fda1c..333ca80b0d 100644
--- a/Telegram/SourceFiles/history.cpp
+++ b/Telegram/SourceFiles/history.cpp
@@ -6542,7 +6542,7 @@ void HistoryMessage::drawMessageText(Painter &p, QRect trect, uint32 selection)
 	p.setFont(st::msgFont);
 	uint16 selectedFrom = (selection == FullSelection) ? 0 : (selection >> 16) & 0xFFFF;
 	uint16 selectedTo = (selection == FullSelection) ? 0 : selection & 0xFFFF;
-	_text.draw(p, trect.x(), trect.y(), trect.width(), Qt::AlignLeft, 0, -1, selectedFrom, selectedTo);
+	_text.draw(p, trect.x(), trect.y(), trect.width(), style::al_left, 0, -1, selectedFrom, selectedTo);
 }
 
 void HistoryMessage::destroy() {