BTextView implementation by Marc Flerackers (with few additions of mine). Still incomplete, it works, tough.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2127 a95241bf-73f2-0310-859d-f6bbb57e9c96
2002-12-02 20:14:03 +00:00
parent c70ca4fc3d
commit 94be8cb515
9 changed files with 2865 additions and 0 deletions
@@ -0,0 +1,135 @@
+//------------------------------------------------------------------------------
+//	Copyright (c) 2001-2002, OpenBeOS
+//
+//	Permission is hereby granted, free of charge, to any person obtaining a
+//	copy of this software and associated documentation files (the "Software"),
+//	to deal in the Software without restriction, including without limitation
+//	the rights to use, copy, modify, merge, publish, distribute, sublicense,
+//	and/or sell copies of the Software, and to permit persons to whom the
+//	Software is furnished to do so, subject to the following conditions:
+//
+//	The above copyright notice and this permission notice shall be included in
+//	all copies or substantial portions of the Software.
+//
+//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+//	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+//	DEALINGS IN THE SOFTWARE.
+//
+//	File Name:		LineBuffer.cpp
+//	Author:			Marc Flerackers ([email protected])
+//	Description:	Line storage used by BTextView
+//------------------------------------------------------------------------------
+
+// Standard Includes -----------------------------------------------------------
+#include <string.h>
+
+// System Includes -------------------------------------------------------------
+#include "LineBuffer.h"
+
+// Project Includes ------------------------------------------------------------
+
+// Local Includes --------------------------------------------------------------
+
+// Local Defines ---------------------------------------------------------------
+
+// Globals ---------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+_BLineBuffer_::_BLineBuffer_()
+	:	fBlockSize(20),
+		fItemCount(2),
+		fPhysicalSize(22),
+		fObjectList(NULL)
+{
+	fObjectList = new STELine[fPhysicalSize];
+
+	memset(fObjectList, 0, fPhysicalSize * sizeof(STELine));
+}
+//------------------------------------------------------------------------------
+_BLineBuffer_::~_BLineBuffer_()
+{
+	delete[] fObjectList;
+}
+//------------------------------------------------------------------------------
+void _BLineBuffer_::InsertLine(STELine *line, int32 index)
+{
+	if (fItemCount == fPhysicalSize - 1)
+	{
+		STELine *new_list = new STELine[fPhysicalSize + fBlockSize];
+
+		memcpy(new_list, fObjectList, fPhysicalSize * sizeof(STELine));
+		delete fObjectList;
+		fObjectList = new_list;
+
+		fPhysicalSize += fBlockSize;
+	}
+
+	if (index < fItemCount)
+		memmove(fObjectList + index + 1, fObjectList + index,
+			(fItemCount - index) * sizeof(STELine));
+	memcpy(fObjectList + index, line, sizeof(STELine));
+
+	fItemCount++;
+}
+//------------------------------------------------------------------------------
+void _BLineBuffer_::RemoveLines(int32 index, int32 count)
+{
+	memmove(fObjectList + index, fObjectList + index + count,
+		(fItemCount - index - count) * sizeof(STELine));
+
+	fItemCount -= count;
+}
+//------------------------------------------------------------------------------
+void _BLineBuffer_::RemoveLineRange(int32 from, int32 to)
+{
+	int32 linefrom = OffsetToLine(from);
+	int32 lineto = OffsetToLine(to);
+
+	if (linefrom < lineto)
+		RemoveLines(linefrom + 1, lineto - linefrom);
+
+	BumpOffset(linefrom + 1, from - to);
+}
+//------------------------------------------------------------------------------
+int32 _BLineBuffer_::OffsetToLine(int32 offset) const
+{
+	if (offset == 0)
+		return 0;
+
+	for (int i = 0; i < fItemCount; i++)
+	{
+		if (offset < fObjectList[i].fOffset)
+			return i - 1;
+	}
+
+	return fItemCount - 2;
+}
+//------------------------------------------------------------------------------
+int32 _BLineBuffer_::PixelToLine(float height) const
+{
+	for (int i = 0; i < fItemCount; i++)
+	{
+		if (height < fObjectList[i].fHeight)
+			return i - 1;
+	}
+
+	return fItemCount - 2;
+}
+//------------------------------------------------------------------------------
+void _BLineBuffer_::BumpOffset(int32 line, int32 offset)
+{
+	for (int i = line; i < fItemCount; i++)
+		fObjectList[i].fOffset += offset;
+}
+//------------------------------------------------------------------------------
+
+/*
+ * $Log $
+ *
+ * $Id  $
+ *
+ */