author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 19 Apr 2010 14:02:13 +0300 | |
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child 23 | e6ad4ef83b23 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (developer.feedback@nokia.com) |
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** |
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** This file is part of the HbCore module of the UI Extensions for Mobile. |
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** |
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** GNU Lesser General Public License Usage |
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** This file may be used under the terms of the GNU Lesser General Public |
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** License version 2.1 as published by the Free Software Foundation and |
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** appearing in the file LICENSE.LGPL included in the packaging of this file. |
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** Please review the following information to ensure the GNU Lesser General |
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** Public License version 2.1 requirements will be met: |
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at developer.feedback@nokia.com. |
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** |
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****************************************************************************/ |
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|
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#include "hbtextutils_p.h" |
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#include <QChar> |
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|
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// Based on \src\common\generic\graphics\gdi\sgdi\BidiCopy.cpp: |
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// Copyright (C) 2002 Symbian Ltd. All rights reserved. |
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|
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/* |
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\class HbTextUtils |
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This class contains internal text utility methods. |
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|
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\proto |
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\internal |
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*/ |
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|
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/* |
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Find out if the implicit directionality of a piece of text is right to |
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left. |
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|
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\param text Text to be examined, terminated by null character. |
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\param length Length of the text. |
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\param found If non-null, returns true if the directionality could be |
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determined from \a text. |
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\return \c true if the directionality is right to left. If the directionality |
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cannot be determined solely from this text, \c false is returned. This is the |
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implicit directionality of text that is composed entirely of neutrals. |
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*/ |
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bool HbTextUtils::ImplicitDirectionalityIsRightToLeft( |
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const ushort* text, int length, bool* found) |
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{ |
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if (found) { |
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*found = true; |
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} |
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|
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qint32 lastUtf16 = 0; |
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const ushort* end = text + length; |
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|
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while (text != end && *text) |
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{ |
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qint32 code = *text++; |
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if ((code & 0xFFFFFC00) == 0xD800 && |
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(lastUtf16 & 0xFFFFFC00) == 0xDC00) |
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{ |
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code = (code << 10) + (lastUtf16 & 0x3FF) |
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+ (0x10000 - 0xD800*0x400); |
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} |
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lastUtf16 = code; |
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QChar c(code); |
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switch(c.direction()) |
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{ |
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case QChar::DirL: |
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return false; |
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case QChar::DirR: |
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case QChar::DirAL: |
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return true; |
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default: |
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break; |
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} |
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} |
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if (found) { |
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*found = false; |
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} |
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return false; |
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} |