зеркало из https://github.com/mozilla/gecko-dev.git
125 строки
4.9 KiB
C++
125 строки
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is Mozilla Foundation code.
|
|
*
|
|
* The Initial Developer of the Original Code is Mozilla Foundation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2006
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Vladimir Vukicevic <vladimir@pobox.com>
|
|
* Ehsan Akhgari <ehsan.akhgari@gmail.com>
|
|
* Jonathan Kew <jfkthame@gmail.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef GFX_TEXT_RUN_WORD_CACHE_H
|
|
#define GFX_TEXT_RUN_WORD_CACHE_H
|
|
|
|
#include "gfxFont.h"
|
|
|
|
/**
|
|
* Cache individual "words" (strings delimited by white-space or white-space-like
|
|
* characters that don't involve kerning or ligatures) in textruns.
|
|
*/
|
|
class THEBES_API gfxTextRunWordCache {
|
|
public:
|
|
enum {
|
|
TEXT_IN_CACHE = 0x10000000,
|
|
|
|
/**
|
|
* nsTextFrameThebes sets these, but they're defined here rather than in
|
|
* nsTextFrameUtils.h because the cache also needs to check the _INCOMING flag
|
|
*/
|
|
TEXT_TRAILING_ARABICCHAR = 0x20000000,
|
|
/**
|
|
* When set, the previous character for this textrun was an Arabic
|
|
* character. This is used for the context detection necessary for
|
|
* bidi.numeral implementation.
|
|
*/
|
|
TEXT_INCOMING_ARABICCHAR = 0x40000000,
|
|
|
|
TEXT_UNUSED_FLAGS = 0x80000000
|
|
};
|
|
|
|
/**
|
|
* Create a textrun using cached words.
|
|
* Invalid characters (see gfxFontGroup::IsInvalidChar) will be automatically
|
|
* treated as invisible missing.
|
|
* @param aFlags the flag TEXT_IS_ASCII must be set by the caller,
|
|
* if applicable; TEXT_IN_CACHE is added if we have a reference to
|
|
* the textrun in the cache and RemoveTextRun must be called when the
|
|
* textrun dies.
|
|
*/
|
|
static gfxTextRun *MakeTextRun(const PRUnichar *aText, PRUint32 aLength,
|
|
gfxFontGroup *aFontGroup,
|
|
const gfxFontGroup::Parameters *aParams,
|
|
PRUint32 aFlags);
|
|
/**
|
|
* Create a textrun using cached words.
|
|
* Invalid characters (see gfxFontGroup::IsInvalidChar) will be automatically
|
|
* treated as invisible missing.
|
|
* @param aFlags the flag TEXT_IS_ASCII must be set by the caller,
|
|
* if applicable; TEXT_IN_CACHE is added if we have a reference to
|
|
* the textrun in the cache and RemoveTextRun must be called when the
|
|
* textrun dies.
|
|
*/
|
|
static gfxTextRun *MakeTextRun(const PRUint8 *aText, PRUint32 aLength,
|
|
gfxFontGroup *aFontGroup,
|
|
const gfxFontGroup::Parameters *aParams,
|
|
PRUint32 aFlags);
|
|
|
|
/**
|
|
* Remove a textrun from the cache. This must be called before aTextRun
|
|
* is deleted! The text in the textrun must still be valid.
|
|
*/
|
|
static void RemoveTextRun(gfxTextRun *aTextRun);
|
|
|
|
/**
|
|
* Flush the textrun cache. This must be called if a configuration
|
|
* change that would affect textruns is applied.
|
|
*/
|
|
static void Flush();
|
|
|
|
/**
|
|
* If aTotal is NULL, just clears the TEXT_RUN_MEMORY_ACCOUNTED flag
|
|
* on each textRun found.
|
|
* If aTotal is non-NULL, adds the storage used for each textRun to the
|
|
* total, and sets the TEXT_RUN_MEMORY_ACCOUNTED flag to avoid double-
|
|
* accounting. (Runs with this flag already set will be skipped.)
|
|
*/
|
|
static void ComputeStorage(PRUint64 *aTotal);
|
|
|
|
protected:
|
|
friend class gfxPlatform;
|
|
|
|
static nsresult Init();
|
|
static void Shutdown();
|
|
};
|
|
|
|
#endif /* GFX_TEXT_RUN_WORD_CACHE_H */
|