b545073f08
gWidthBuffer. * Tracker PoseView now uses BPrivate::gWidthBuffer instead of it's own instance. * TextView.h and PoseView.h are now a little cleaner. * InterfaceDefs.cpp now deletes gWidthBuffer in _fini_interface_kit_(). * Added binary compatibility support for NetPositive in WidthBuffer.h and .cpp. Obviously it kind of defeats the purpose of having WidthBuffer neatly tucked away in the BPrivate namespace, but Haiku should run NetPositive, I guess. Fixes #2879. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@28532 a95241bf-73f2-0310-859d-f6bbb57e9c96
101 lines
3.0 KiB
C++
101 lines
3.0 KiB
C++
/*
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* Copyright (c) 2003-2004 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: WidthBuffer.cpp
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* Author: Stefano Ceccherini (burton666@libero.it)
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* Description: WidthBuffer stores charachters widths in a hash table, to be able
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* to retrieve them without passing through the app server.
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* Used by BTextView and OpenTracker.
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*/
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#ifndef __WIDTHBUFFER_H
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#define __WIDTHBUFFER_H
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#include <TextView.h>
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#include "TextViewSupportBuffer.h"
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class BFont;
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// TODO: enable this as soon as we are sure opentracker works
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// with our libraries, since using a BFont here (as Dano does) is much better,
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// as fonts can be classified also by spacing mode and other attributes.
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#define USE_DANO_WIDTHBUFFER 0
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namespace BPrivate {
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class TextGapBuffer;
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struct _width_table_ {
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#if USE_DANO_WIDTHBUFFER
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BFont font; // corresponding font
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#else
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int32 fontCode; // font code
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float fontSize; // font size
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#endif
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int32 hashCount; // number of hashed items
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int32 tableCount; // size of table
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void *widths; // width table
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};
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class WidthBuffer : public _BTextViewSupportBuffer_<_width_table_> {
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public:
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WidthBuffer();
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virtual ~WidthBuffer();
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float StringWidth(const char *inText, int32 fromOffset, int32 length,
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const BFont *inStyle);
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float StringWidth(TextGapBuffer &gapBuffer, int32 fromOffset,
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int32 length, const BFont *inStyle);
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private:
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bool FindTable(const BFont *font, int32 *outIndex);
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int32 InsertTable(const BFont *font);
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bool GetEscapement(uint32 value, int32 index, float *escapement);
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float HashEscapements(const char *chars, int32 numChars, int32 numBytes,
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int32 tableIndex, const BFont *font);
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static uint32 Hash(uint32);
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};
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extern WidthBuffer* gWidthBuffer;
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} // namespace BPrivate
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using BPrivate::WidthBuffer;
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#if __GNUC__ < 3
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//! NetPositive binary compatibility support
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class _BWidthBuffer_ : public _BTextViewSupportBuffer_<BPrivate::_width_table_> {
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_BWidthBuffer_();
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virtual ~_BWidthBuffer_();
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};
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extern
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_BWidthBuffer_* gCompatibilityWidthBuffer;
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#endif // __GNUC__ < 3
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#endif // __WIDTHBUFFER_H
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