From 3b7dc0dae2b798e84ff02bfe0c2a6eb75fc29fad Mon Sep 17 00:00:00 2001
From: Muzychenko Andrey <33288308+k4zmu2a@users.noreply.github.com>
Date: Sat, 20 Nov 2021 19:03:22 +0300
Subject: [PATCH] Added centered text in textboxes in FT mode.

---
 SpaceCadetPinball/TTextBox.cpp | 114 +++++++++++++++++++--------------
 SpaceCadetPinball/TTextBox.h   |  13 +++-
 2 files changed, 78 insertions(+), 49 deletions(-)

diff --git a/SpaceCadetPinball/TTextBox.cpp b/SpaceCadetPinball/TTextBox.cpp
index 5467555..efeac20 100644
--- a/SpaceCadetPinball/TTextBox.cpp
+++ b/SpaceCadetPinball/TTextBox.cpp
@@ -4,6 +4,7 @@
 #include "control.h"
 #include "fullscrn.h"
 #include "loader.h"
+#include "pb.h"
 #include "render.h"
 #include "score.h"
 #include "timer.h"
@@ -84,7 +85,7 @@ void TTextBox::Clear()
 			OffsetX,
 			OffsetY);
 	else
-		gdrv::fill_bitmap(render::vscreen, Width, Height, OffsetX, OffsetY, 0);	
+		gdrv::fill_bitmap(render::vscreen, Width, Height, OffsetX, OffsetY, 0);
 	if (Timer)
 	{
 		if (Timer != -1)
@@ -186,8 +187,7 @@ void TTextBox::Draw()
 
 	if (display)
 	{
-		auto font = Font;
-		if (!font)
+		if (!Font)
 		{
 			gdrv::grtext_draw_ttext_in_box(
 				Message1->Text,
@@ -199,64 +199,84 @@ void TTextBox::Draw()
 			return;
 		}
 
-		auto text = Message1->Text;
-		for (auto y = OffsetY; ; y += font->Height)
+		std::vector<LayoutResult> lines{};
+		auto textHeight = 0;
+		for (auto text = Message1->Text; ; textHeight += Font->Height)
 		{
-			auto curChar = *text;
-			if (!curChar || y + font->Height > OffsetY + Height)
+			if (!text[0] || textHeight + Font->Height > Height)
 				break;
 
-			auto totalWidth = 0;
-			char* textEndSpace = nullptr;
-			auto textEnd = text;
-			while (true)
-			{
-				auto maskedChar = curChar & 0x7F;
-				if (!maskedChar || maskedChar == '\n')
-					break;
-				auto charBmp = font->Chars[maskedChar];
-				if (charBmp)
-				{
-					auto width = charBmp->Width + font->GapWidth + totalWidth;
-					if (width > Width)
-					{
-						if (textEndSpace)
-							textEnd = textEndSpace;
-						break;
-					}
-					if (*textEnd == ' ')
-						textEndSpace = textEnd;
-					curChar = *(textEnd + 1);
-					totalWidth = width;
-					++textEnd;
-				}
-				else
-				{
-					curChar = *textEnd;
-				}
-			}
+			auto line = LayoutTextLine(text);
+			if (line.Start == line.End)
+				break;
+			lines.push_back(line);
+			text = line.End;
+		}
 
+		// Textboxes in FT display texts centered
+		auto offY = OffsetY;
+		if (pb::FullTiltMode)
+			offY += (Height - textHeight) / 2;
+		for (auto line : lines)
+		{
 			auto offX = OffsetX;
-			while (text < textEnd)
+			if (pb::FullTiltMode)
+				offX += (Width - line.Width) / 2;
+			for (auto text = line.Start; text < line.End; text++)
 			{
-				auto charBmp = font->Chars[*text++ & 0x7F];
+				auto charBmp = Font->Chars[*text & 0x7F];
 				if (charBmp)
 				{
 					auto height = charBmp->Height;
 					auto width = charBmp->Width;
 					if (render::background_bitmap)
-						gdrv::copy_bitmap_w_transparency(render::vscreen, width, height, offX, y, charBmp, 0,
+						gdrv::copy_bitmap_w_transparency(render::vscreen, width, height, offX, offY, charBmp, 0,
 						                                 0);
 					else
-						gdrv::copy_bitmap(render::vscreen, width, height, offX, y, charBmp, 0, 0);
-					font = Font;
-					offX += charBmp->Width + font->GapWidth;
+						gdrv::copy_bitmap(render::vscreen, width, height, offX, offY, charBmp, 0, 0);
+					offX += charBmp->Width + Font->GapWidth;
 				}
 			}
-			while ((*text & 0x7F) == ' ')
-				++text;
-			if ((*text & 0x7F) == '\n')
-				++text;
+			offY += Font->Height;
 		}
-	}	
+	}
+}
+
+TTextBox::LayoutResult TTextBox::LayoutTextLine(char* textStart) const
+{
+	auto lineWidth = 0, wordWidth = 0;
+	char *wordBoundary = nullptr, *textEnd;
+	for (textEnd = textStart; ; ++textEnd)
+	{
+		auto maskedChar = textEnd[0] & 0x7F;
+		if (!maskedChar || maskedChar == '\n')
+			break;
+
+		auto charBmp = Font->Chars[maskedChar];
+		if (!charBmp)
+			continue;
+
+		auto width = lineWidth + charBmp->Width + Font->GapWidth;
+		if (width > Width)
+		{
+			if (wordBoundary)
+			{
+				textEnd = wordBoundary;
+				lineWidth = wordWidth;
+			}
+			break;
+		}
+		if (maskedChar == ' ')
+		{
+			wordBoundary = textEnd;
+			wordWidth = width;
+		}
+		lineWidth = width;
+	}
+
+	while ((*textEnd & 0x7F) == ' ')
+		++textEnd;
+	if ((*textEnd & 0x7F) == '\n')
+		++textEnd;
+	return LayoutResult{textStart, textEnd, lineWidth};
 }
diff --git a/SpaceCadetPinball/TTextBox.h b/SpaceCadetPinball/TTextBox.h
index 3bcb174..ad2b908 100644
--- a/SpaceCadetPinball/TTextBox.h
+++ b/SpaceCadetPinball/TTextBox.h
@@ -22,7 +22,16 @@ public:
 	int Message(int code, float value) override;
 	void Clear();
 	void Display(const char* text, float time);
-	void Draw();
 
-	static void TimerExpired(int timerId, void* tb);
+private:
+	struct LayoutResult
+	{
+		char *Start, *End;
+		int Width;
+	};
+
+	static void TimerExpired(int timerId, void* caller);
+
+	void Draw();
+	LayoutResult LayoutTextLine(char* textStart) const;
 };