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