From e454df24f55c359dd522751079e94df9ab0f87fa Mon Sep 17 00:00:00 2001
From: =?utf8?q?Andr=C3=A9=20P=C3=B6nitz?= <poenitz@gmx.net>
Date: Wed, 8 Aug 2001 11:03:53 +0000
Subject: [PATCH] somewhat better corser up/down handling

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@2452 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/mathed/math_cursor.C | 54 ++++++++++++++++++++++------------------
 src/mathed/math_cursor.h | 16 ++++++------
 2 files changed, 38 insertions(+), 32 deletions(-)

diff --git a/src/mathed/math_cursor.C b/src/mathed/math_cursor.C
index 9c04806f41..dd60e72fdd 100644
--- a/src/mathed/math_cursor.C
+++ b/src/mathed/math_cursor.C
@@ -518,7 +518,7 @@ bool MathCursor::up(bool sel)
 	selHandle(sel);
 
 	if (selection_)
-		return idxUp() || popLeft();
+		return goUp();
 
 	// check whether we could move into an inset on the right or on the left
 	MathInset * p = nextInset();
@@ -545,7 +545,7 @@ bool MathCursor::up(bool sel)
 		}
 	}
 
-	return idxUp() || popLeft();
+	return goUp();
 }
 
 
@@ -556,7 +556,7 @@ bool MathCursor::down(bool sel)
 	selHandle(sel);
 
 	if (selection_) 
-		return idxDown() || popLeft();
+		return goDown();
 
 	// check whether we could move into an inset on the right or on the left
 	MathInset * p = nextInset();
@@ -585,7 +585,7 @@ bool MathCursor::down(bool sel)
 		}
 	}
 
-	return idxDown() || popLeft();
+	return goDown();
 }
 
 
@@ -1269,31 +1269,37 @@ void MathCursor::gotoX(int x)
 }
 
 
-bool MathCursor::idxUp()
+bool MathCursor::goUp()
 {
-	int x = par()->xo() + xpos();
-	do {
-		if (par()->idxUp(idx(), pos())) {
-			gotoX(x - par()->xo());
-			return true;
-		}
-	} while (popLeft());
-	gotoX(x - par()->xo());
-	return true;
+	int x0;
+	int y0;
+	getPos(x0, y0);
+	std::vector<MathCursorPos> save = Cursor_;
+	y0 -= xarray().ascent();
+	for (int y = y0 - 4; y > outerPar()->yo() - outerPar()->ascent(); y -= 4) {
+		setPos(x0, y);
+		if (save != Cursor_ && xarray().yo() < y0)
+			return true;	
+	}
+	Cursor_ = save;
+	return false;
 }
 
 
-bool MathCursor::idxDown()
+bool MathCursor::goDown()
 {
-	int x = par()->xo() + xpos();
-	do {
-		if (par()->idxDown(idx(), pos())) {
-			gotoX(x - par()->xo());
-			return true;
-		}
-	} while (popLeft());
-	gotoX(x - par()->xo());
-	return true;
+	int x0;
+	int y0;
+	getPos(x0, y0);
+	std::vector<MathCursorPos> save = Cursor_;
+	y0 += xarray().descent();
+	for (int y = y0 + 4; y < outerPar()->yo() + outerPar()->descent(); y += 4) {
+		setPos(x0, y);
+		if (save != Cursor_ && xarray().yo() > y0)
+			return true;	
+	}
+	Cursor_ = save;
+	return false;
 }
 
 
diff --git a/src/mathed/math_cursor.h b/src/mathed/math_cursor.h
index 8e700b943a..c8b4935afa 100644
--- a/src/mathed/math_cursor.h
+++ b/src/mathed/math_cursor.h
@@ -91,18 +91,18 @@ public:
 	void first();
 	/// Put the cursor in the last position
 	void last();
-	///
+	/// moves cursor position one cell to the left
 	bool posLeft();
-	///
+	/// moves cursor position one cell to the right
 	bool posRight();
-	/// moves position one cell to the left
+	/// moves cursor index one cell to the left
 	bool idxLeft();
-	/// moves position one cell to the right
+	/// moves cursor index one cell to the right
 	bool idxRight();
-	/// moves position one cell up
-	bool idxUp();
-	/// moves position one cell down
-	bool idxDown();
+	/// moves position somehow up
+	bool goUp();
+	/// moves position somehow down
+	bool goDown();
 	///
 	void idxNext();
 	///
-- 
2.39.2