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110 lines
4.4 KiB
C++
110 lines
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Foundation code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Vladimir Vukicevic <vladimir@pobox.com>
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* Ehsan Akhgari <ehsan.akhgari@gmail.com>
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* Jonathan Kew <jfkthame@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef GFX_TEXT_RUN_WORD_CACHE_H
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#define GFX_TEXT_RUN_WORD_CACHE_H
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#include "gfxFont.h"
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/**
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* Cache individual "words" (strings delimited by white-space or white-space-like
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* characters that don't involve kerning or ligatures) in textruns.
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*/
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class THEBES_API gfxTextRunWordCache {
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public:
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enum {
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TEXT_IN_CACHE = 0x10000000,
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/**
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* nsTextFrameThebes sets these, but they're defined here rather than in
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* nsTextFrameUtils.h because the cache also needs to check the _INCOMING flag
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*/
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TEXT_TRAILING_ARABICCHAR = 0x20000000,
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/**
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* When set, the previous character for this textrun was an Arabic
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* character. This is used for the context detection necessary for
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* bidi.numeral implementation.
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*/
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TEXT_INCOMING_ARABICCHAR = 0x40000000,
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TEXT_UNUSED_FLAGS = 0x80000000
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};
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/**
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* Create a textrun using cached words.
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* Invalid characters (see gfxFontGroup::IsInvalidChar) will be automatically
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* treated as invisible missing.
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* @param aFlags the flag TEXT_IS_ASCII must be set by the caller,
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* if applicable; TEXT_IN_CACHE is added if we have a reference to
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* the textrun in the cache and RemoveTextRun must be called when the
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* textrun dies.
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*/
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static gfxTextRun *MakeTextRun(const PRUnichar *aText, PRUint32 aLength,
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gfxFontGroup *aFontGroup,
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const gfxFontGroup::Parameters *aParams,
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PRUint32 aFlags);
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/**
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* Create a textrun using cached words.
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* Invalid characters (see gfxFontGroup::IsInvalidChar) will be automatically
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* treated as invisible missing.
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* @param aFlags the flag TEXT_IS_ASCII must be set by the caller,
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* if applicable; TEXT_IN_CACHE is added if we have a reference to
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* the textrun in the cache and RemoveTextRun must be called when the
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* textrun dies.
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*/
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static gfxTextRun *MakeTextRun(const PRUint8 *aText, PRUint32 aLength,
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gfxFontGroup *aFontGroup,
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const gfxFontGroup::Parameters *aParams,
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PRUint32 aFlags);
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/**
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* Remove a textrun from the cache. This must be called before aTextRun
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* is deleted! The text in the textrun must still be valid.
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*/
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static void RemoveTextRun(gfxTextRun *aTextRun);
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protected:
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friend class gfxPlatform;
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static nsresult Init();
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static void Shutdown();
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};
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#endif /* GFX_TEXT_RUN_WORD_CACHE_H */
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