Stefano Ceccherini
f900119889
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9647 a95241bf-73f2-0310-859d-f6bbb57e9c96
126 lines
3.0 KiB
C++
126 lines
3.0 KiB
C++
//------------------------------------------------------------------------------
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// Copyright (c) 2001-2004, Haiku, Inc.
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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 ([email protected])
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// Description: Line storage used by BTextView
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//------------------------------------------------------------------------------
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#include "LineBuffer.h"
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_BLineBuffer_::_BLineBuffer_()
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: _BTextViewSupportBuffer_<STELine>(20, 2)
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{
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}
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_BLineBuffer_::~_BLineBuffer_()
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{
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}
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void
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_BLineBuffer_::InsertLine(STELine *inLine, int32 index)
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{
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InsertItemsAt(1, index, inLine);
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}
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void
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_BLineBuffer_::RemoveLines(int32 index, int32 count)
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{
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RemoveItemsAt(count, index);
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}
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void
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_BLineBuffer_::RemoveLineRange(int32 fromOffset, int32 toOffset)
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{
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int32 fromLine = OffsetToLine(fromOffset);
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int32 toLine = OffsetToLine(toOffset);
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int32 count = toLine - fromLine;
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if (count > 0)
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RemoveLines(fromLine + 1, count);
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BumpOffset(fromOffset - toOffset, fromLine + 1);
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}
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int32
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_BLineBuffer_::OffsetToLine(int32 offset) const
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{
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int32 minIndex = 0;
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int32 maxIndex = fItemCount - 1;
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int32 index = 0;
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while (minIndex < maxIndex) {
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index = (minIndex + maxIndex) >> 1;
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if (offset >= fBuffer[index].offset) {
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if (offset < fBuffer[index + 1].offset)
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break;
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else
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minIndex = index + 1;
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} else
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maxIndex = index;
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}
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return index;
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}
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int32 _BLineBuffer_::PixelToLine(float pixel) const
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{
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int32 minIndex = 0;
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int32 maxIndex = fItemCount - 1;
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int32 index = 0;
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while (minIndex < maxIndex) {
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index = (minIndex + maxIndex) >> 1;
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if (pixel >= fBuffer[index].origin) {
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if (pixel < fBuffer[index + 1].origin)
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break;
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else
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minIndex = index + 1;
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} else
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maxIndex = index;
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}
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return index;
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}
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void
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_BLineBuffer_::BumpOrigin(float delta, long index)
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{
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for (long i = index; i < fItemCount; i++)
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fBuffer[i].origin += delta;
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}
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void
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_BLineBuffer_::BumpOffset(int32 delta, int32 index)
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{
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for (long i = index; i < fItemCount; i++)
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fBuffer[i].offset += delta;
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}
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