From e97d9097da30e412eaea5a55e6bece21cefc7c68 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stephan=20A=C3=9Fmus?= <superstippi@gmx.de>
Date: Sat, 18 Jan 2014 10:28:48 +0100
Subject: [PATCH] ParagraphLayout: Added more utility methods

* FirtOffsetOnLine(), LastOffsetOnLine(), and GetLineBounds()
---
 .../haiku-depot/textview/ParagraphLayout.cpp  | 67 +++++++++++++++++++
 .../haiku-depot/textview/ParagraphLayout.h    |  6 ++
 2 files changed, 73 insertions(+)

diff --git a/src/apps/haiku-depot/textview/ParagraphLayout.cpp b/src/apps/haiku-depot/textview/ParagraphLayout.cpp
index 33eccf31fa..fe9ccc68b2 100644
--- a/src/apps/haiku-depot/textview/ParagraphLayout.cpp
+++ b/src/apps/haiku-depot/textview/ParagraphLayout.cpp
@@ -307,6 +307,73 @@ ParagraphLayout::LineIndexForOffset(int32 textOffset)
 }
 
 
+int32
+ParagraphLayout::FirstOffsetOnLine(int32 lineIndex)
+{
+	_ValidateLayout();
+
+	if (lineIndex < 0)
+		lineIndex = 0;
+	if (lineIndex > fLineInfos.CountItems())
+		lineIndex = fLineInfos.CountItems() - 1;
+
+	return fLineInfos.ItemAt(lineIndex).textOffset;
+}
+
+
+int32
+ParagraphLayout::LastOffsetOnLine(int32 lineIndex)
+{
+	_ValidateLayout();
+
+	if (lineIndex < 0)
+		lineIndex = 0;
+	if (lineIndex >= fLineInfos.CountItems() - 1)
+		return CountGlyphs();
+
+	return fLineInfos.ItemAt(lineIndex + 1).textOffset - 1;
+}
+
+
+void
+ParagraphLayout::GetLineBounds(int32 lineIndex, float& x1, float& y1,
+	float& x2, float& y2)
+{
+	_ValidateLayout();
+
+	if (fGlyphInfos.CountItems() == 0) {
+		x1 = 0.0f;
+		y1 = 0.0f;
+		x2 = 0.0f;
+		y2 = 0.0f;
+
+		return;
+	}
+
+	if (lineIndex < 0)
+		lineIndex = 0;
+	if (lineIndex > fLineInfos.CountItems())
+		lineIndex = fLineInfos.CountItems() - 1;
+
+	const LineInfo& lineInfo = fLineInfos.ItemAt(lineIndex);
+	int32 firstGlyphIndex = lineInfo.textOffset;
+
+	int32 lastGlyphIndex;
+	if (lineIndex < fLineInfos.CountItems() - 1)
+		lastGlyphIndex = fLineInfos.ItemAt(lineIndex + 1).textOffset - 1;
+	else
+		lastGlyphIndex = fGlyphInfos.CountItems() - 1;
+
+	const GlyphInfo& firstInfo = fGlyphInfos.ItemAtFast(firstGlyphIndex);
+	const GlyphInfo& lastInfo = fGlyphInfos.ItemAtFast(lastGlyphIndex);
+
+	x1 = firstInfo.x;
+	y1 = lineInfo.y;
+	x2 = lastInfo.x + lastInfo.width;
+	y1 = lineInfo.y + lineInfo.height;
+}
+
+
 void
 ParagraphLayout::GetTextBounds(int32 textOffset, float& x1, float& y1,
 	float& x2, float& y2)
diff --git a/src/apps/haiku-depot/textview/ParagraphLayout.h b/src/apps/haiku-depot/textview/ParagraphLayout.h
index 8e622ce314..99bf5b76c6 100644
--- a/src/apps/haiku-depot/textview/ParagraphLayout.h
+++ b/src/apps/haiku-depot/textview/ParagraphLayout.h
@@ -193,6 +193,12 @@ public:
 			int32				CountLines();
 
 			int32				LineIndexForOffset(int32 textOffset);
+			int32				FirstOffsetOnLine(int32 lineIndex);
+			int32				LastOffsetOnLine(int32 lineIndex);
+
+			void				GetLineBounds(int32 lineIndex,
+									float& x1, float& y1,
+									float& x2, float& y2);
 
 			void				GetTextBounds(int32 textOffset,
 									float& x1, float& y1,