| author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
| Tue, 02 Feb 2010 00:43:10 +0200 | |
| changeset 3 | 41300fa6a67c |
| parent 0 | 1918ee327afb |
| child 4 | 3b1da2848fc7 |
| child 7 | f7bc934e204c |
| permissions | -rw-r--r-- |
| 0 | 1 |
/**************************************************************************** |
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** |
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the QtGui module of the Qt Toolkit. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: 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 qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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#include "qdebug.h" |
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#include "qtextformat.h" |
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#include "qtextformat_p.h" |
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#include "qtextengine_p.h" |
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#include "qabstracttextdocumentlayout.h" |
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#include "qtextlayout.h" |
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#include "qtextboundaryfinder.h" |
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#include "qvarlengtharray.h" |
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#include "qfont.h" |
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#include "qfont_p.h" |
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#include "qfontengine_p.h" |
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#include "qstring.h" |
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#include <private/qunicodetables_p.h> |
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#include "qtextdocument_p.h" |
|
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#include <qapplication.h> |
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#include <stdlib.h> |
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58 |
||
59 |
||
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QT_BEGIN_NAMESPACE |
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namespace {
|
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// Helper class used in QTextEngine::itemize |
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// keep it out here to allow us to keep supporting various compilers. |
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class Itemizer {
|
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public: |
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Itemizer(const QString &string, const QScriptAnalysis *analysis, QScriptItemArray &items) |
|
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: m_string(string), |
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m_analysis(analysis), |
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m_items(items), |
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m_splitter(0) |
|
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{
|
|
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} |
|
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~Itemizer() |
|
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{
|
|
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delete m_splitter; |
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} |
|
78 |
||
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/// generate the script items |
|
80 |
/// The caps parameter is used to choose the algoritm of splitting text and assiging roles to the textitems |
|
81 |
void generate(int start, int length, QFont::Capitalization caps) |
|
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{
|
|
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if ((int)caps == (int)QFont::SmallCaps) |
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generateScriptItemsSmallCaps(m_string.utf16(), start, length); |
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else if(caps == QFont::Capitalize) |
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generateScriptItemsCapitalize(start, length); |
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else if(caps != QFont::MixedCase) {
|
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generateScriptItemsAndChangeCase(start, length, |
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caps == QFont::AllLowercase ? QScriptAnalysis::Lowercase : QScriptAnalysis::Uppercase); |
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} |
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else |
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generateScriptItems(start, length); |
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} |
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private: |
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enum { MaxItemLength = 4096 };
|
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97 |
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void generateScriptItemsAndChangeCase(int start, int length, QScriptAnalysis::Flags flags) |
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{
|
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generateScriptItems(start, length); |
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if (m_items.isEmpty()) // the next loop won't work in that case |
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return; |
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QScriptItemArray::Iterator iter = m_items.end(); |
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do {
|
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iter--; |
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if (iter->analysis.flags < QScriptAnalysis::TabOrObject) |
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iter->analysis.flags = flags; |
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} while (iter->position > start); |
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} |
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110 |
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111 |
void generateScriptItems(int start, int length) |
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{
|
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if (!length) |
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return; |
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const int end = start + length; |
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for (int i = start + 1; i < end; ++i) {
|
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if ((m_analysis[i] == m_analysis[start]) |
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&& m_analysis[i].flags < QScriptAnalysis::SpaceTabOrObject |
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&& i - start < MaxItemLength) |
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continue; |
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m_items.append(QScriptItem(start, m_analysis[start])); |
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start = i; |
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} |
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m_items.append(QScriptItem(start, m_analysis[start])); |
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} |
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void generateScriptItemsCapitalize(int start, int length) |
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{
|
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if (!length) |
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return; |
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if (!m_splitter) |
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m_splitter = new QTextBoundaryFinder(QTextBoundaryFinder::Word, |
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m_string.constData(), m_string.length(), |
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/*buffer*/0, /*buffer size*/0); |
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m_splitter->setPosition(start); |
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QScriptAnalysis itemAnalysis = m_analysis[start]; |
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if (m_splitter->boundaryReasons() & QTextBoundaryFinder::StartWord) {
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itemAnalysis.flags = QScriptAnalysis::Uppercase; |
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m_splitter->toNextBoundary(); |
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} |
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const int end = start + length; |
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for (int i = start + 1; i < end; ++i) {
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bool atWordBoundary = false; |
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if (i == m_splitter->position()) {
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if (m_splitter->boundaryReasons() & QTextBoundaryFinder::StartWord |
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&& m_analysis[i].flags < QScriptAnalysis::TabOrObject) |
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atWordBoundary = true; |
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m_splitter->toNextBoundary(); |
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} |
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if (m_analysis[i] == itemAnalysis |
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&& m_analysis[i].flags < QScriptAnalysis::TabOrObject |
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&& !atWordBoundary |
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&& i - start < MaxItemLength) |
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continue; |
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m_items.append(QScriptItem(start, itemAnalysis)); |
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start = i; |
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itemAnalysis = m_analysis[start]; |
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if (atWordBoundary) |
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itemAnalysis.flags = QScriptAnalysis::Uppercase; |
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} |
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m_items.append(QScriptItem(start, itemAnalysis)); |
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} |
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void generateScriptItemsSmallCaps(const ushort *uc, int start, int length) |
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{
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if (!length) |
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return; |
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bool lower = (QChar::category(uc[start]) == QChar::Letter_Lowercase); |
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const int end = start + length; |
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// split text into parts that are already uppercase and parts that are lowercase, and mark the latter to be uppercased later. |
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for (int i = start + 1; i < end; ++i) {
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bool l = (QChar::category(uc[i]) == QChar::Letter_Lowercase); |
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if ((m_analysis[i] == m_analysis[start]) |
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&& m_analysis[i].flags < QScriptAnalysis::TabOrObject |
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&& l == lower |
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&& i - start < MaxItemLength) |
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continue; |
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m_items.append(QScriptItem(start, m_analysis[start])); |
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if (lower) |
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m_items.last().analysis.flags = QScriptAnalysis::SmallCaps; |
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start = i; |
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lower = l; |
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} |
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m_items.append(QScriptItem(start, m_analysis[start])); |
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if (lower) |
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m_items.last().analysis.flags = QScriptAnalysis::SmallCaps; |
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} |
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const QString &m_string; |
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const QScriptAnalysis * const m_analysis; |
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QScriptItemArray &m_items; |
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QTextBoundaryFinder *m_splitter; |
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}; |
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} |
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// ---------------------------------------------------------------------------- |
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// |
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// The BiDi algorithm |
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// |
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// ---------------------------------------------------------------------------- |
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#define BIDI_DEBUG 0 |
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#if (BIDI_DEBUG >= 1) |
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QT_BEGIN_INCLUDE_NAMESPACE |
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#include <iostream> |
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QT_END_INCLUDE_NAMESPACE |
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using namespace std; |
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static const char *directions[] = {
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"DirL", "DirR", "DirEN", "DirES", "DirET", "DirAN", "DirCS", "DirB", "DirS", "DirWS", "DirON", |
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"DirLRE", "DirLRO", "DirAL", "DirRLE", "DirRLO", "DirPDF", "DirNSM", "DirBN" |
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}; |
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#endif |
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struct QBidiStatus {
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QBidiStatus() {
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eor = QChar::DirON; |
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lastStrong = QChar::DirON; |
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last = QChar:: DirON; |
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dir = QChar::DirON; |
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} |
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QChar::Direction eor; |
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QChar::Direction lastStrong; |
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QChar::Direction last; |
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QChar::Direction dir; |
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}; |
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enum { MaxBidiLevel = 61 };
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struct QBidiControl {
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inline QBidiControl(bool rtl) |
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: cCtx(0), base(rtl ? 1 : 0), level(rtl ? 1 : 0), override(false) {}
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inline void embed(bool rtl, bool o = false) {
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unsigned int toAdd = 1; |
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if((level%2 != 0) == rtl ) {
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++toAdd; |
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} |
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if (level + toAdd <= MaxBidiLevel) {
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ctx[cCtx].level = level; |
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ctx[cCtx].override = override; |
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cCtx++; |
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override = o; |
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level += toAdd; |
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} |
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} |
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inline bool canPop() const { return cCtx != 0; }
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inline void pdf() {
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Q_ASSERT(cCtx); |
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--cCtx; |
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level = ctx[cCtx].level; |
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override = ctx[cCtx].override; |
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} |
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inline QChar::Direction basicDirection() const {
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return (base ? QChar::DirR : QChar:: DirL); |
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} |
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inline unsigned int baseLevel() const {
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return base; |
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} |
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inline QChar::Direction direction() const {
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return ((level%2) ? QChar::DirR : QChar:: DirL); |
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} |
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struct {
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unsigned int level; |
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bool override; |
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} ctx[MaxBidiLevel]; |
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unsigned int cCtx; |
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const unsigned int base; |
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unsigned int level; |
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bool override; |
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}; |
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287 |
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288 |
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static void appendItems(QScriptAnalysis *analysis, int &start, int &stop, const QBidiControl &control, QChar::Direction dir) |
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{
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if (start > stop) |
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return; |
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int level = control.level; |
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295 |
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296 |
if(dir != QChar::DirON && !control.override) {
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// add level of run (cases I1 & I2) |
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if(level % 2) {
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299 |
if(dir == QChar::DirL || dir == QChar::DirAN || dir == QChar::DirEN) |
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level++; |
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} else {
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if(dir == QChar::DirR) |
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level++; |
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else if(dir == QChar::DirAN || dir == QChar::DirEN) |
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level += 2; |
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} |
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} |
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308 |
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309 |
#if (BIDI_DEBUG >= 1) |
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310 |
qDebug("new run: dir=%s from %d, to %d level = %d override=%d", directions[dir], start, stop, level, control.override);
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311 |
#endif |
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312 |
QScriptAnalysis *s = analysis + start; |
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313 |
const QScriptAnalysis *e = analysis + stop; |
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314 |
while (s <= e) {
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315 |
s->bidiLevel = level; |
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316 |
++s; |
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317 |
} |
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318 |
++stop; |
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319 |
start = stop; |
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320 |
} |
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321 |
||
322 |
||
323 |
// creates the next QScript items. |
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324 |
static bool bidiItemize(QTextEngine *engine, QScriptAnalysis *analysis, QBidiControl &control) |
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325 |
{
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326 |
bool rightToLeft = (control.basicDirection() == 1); |
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327 |
bool hasBidi = rightToLeft; |
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328 |
#if BIDI_DEBUG >= 2 |
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329 |
qDebug() << "bidiItemize: rightToLeft=" << rightToLeft << engine->layoutData->string; |
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330 |
#endif |
|
331 |
||
332 |
int sor = 0; |
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333 |
int eor = -1; |
|
334 |
||
335 |
||
336 |
int length = engine->layoutData->string.length(); |
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337 |
||
338 |
const ushort *unicode = (const ushort *)engine->layoutData->string.unicode(); |
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339 |
int current = 0; |
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340 |
||
341 |
QChar::Direction dir = rightToLeft ? QChar::DirR : QChar::DirL; |
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342 |
QBidiStatus status; |
|
343 |
||
344 |
QChar::Direction sdir = QChar::direction(*unicode); |
|
345 |
if (sdir != QChar::DirL && sdir != QChar::DirR && sdir != QChar::DirEN && sdir != QChar::DirAN) |
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346 |
sdir = QChar::DirON; |
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347 |
else |
|
348 |
dir = QChar::DirON; |
|
349 |
status.eor = sdir; |
|
350 |
status.lastStrong = rightToLeft ? QChar::DirR : QChar::DirL; |
|
351 |
status.last = status.lastStrong; |
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352 |
status.dir = sdir; |
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353 |
||
354 |
||
355 |
while (current <= length) {
|
|
356 |
||
357 |
QChar::Direction dirCurrent; |
|
358 |
if (current == (int)length) |
|
359 |
dirCurrent = control.basicDirection(); |
|
360 |
else |
|
361 |
dirCurrent = QChar::direction(unicode[current]); |
|
362 |
||
363 |
#if (BIDI_DEBUG >= 2) |
|
364 |
// qDebug() << "pos=" << current << " dir=" << directions[dir] |
|
365 |
// << " current=" << directions[dirCurrent] << " last=" << directions[status.last] |
|
366 |
// << " eor=" << eor << '/' << directions[status.eor] |
|
367 |
// << " sor=" << sor << " lastStrong=" |
|
368 |
// << directions[status.lastStrong] |
|
369 |
// << " level=" << (int)control.level << " override=" << (bool)control.override; |
|
370 |
#endif |
|
371 |
||
372 |
switch(dirCurrent) {
|
|
373 |
||
374 |
// embedding and overrides (X1-X9 in the BiDi specs) |
|
375 |
case QChar::DirRLE: |
|
376 |
case QChar::DirRLO: |
|
377 |
case QChar::DirLRE: |
|
378 |
case QChar::DirLRO: |
|
379 |
{
|
|
380 |
bool rtl = (dirCurrent == QChar::DirRLE || dirCurrent == QChar::DirRLO); |
|
381 |
hasBidi |= rtl; |
|
382 |
bool override = (dirCurrent == QChar::DirLRO || dirCurrent == QChar::DirRLO); |
|
383 |
||
384 |
unsigned int level = control.level+1; |
|
385 |
if ((level%2 != 0) == rtl) ++level; |
|
386 |
if(level < MaxBidiLevel) {
|
|
387 |
eor = current-1; |
|
388 |
appendItems(analysis, sor, eor, control, dir); |
|
389 |
eor = current; |
|
390 |
control.embed(rtl, override); |
|
391 |
QChar::Direction edir = (rtl ? QChar::DirR : QChar::DirL); |
|
392 |
dir = status.eor = edir; |
|
393 |
status.lastStrong = edir; |
|
394 |
} |
|
395 |
break; |
|
396 |
} |
|
397 |
case QChar::DirPDF: |
|
398 |
{
|
|
399 |
if (control.canPop()) {
|
|
400 |
if (dir != control.direction()) {
|
|
401 |
eor = current-1; |
|
402 |
appendItems(analysis, sor, eor, control, dir); |
|
403 |
dir = control.direction(); |
|
404 |
} |
|
405 |
eor = current; |
|
406 |
appendItems(analysis, sor, eor, control, dir); |
|
407 |
control.pdf(); |
|
408 |
dir = QChar::DirON; status.eor = QChar::DirON; |
|
409 |
status.last = control.direction(); |
|
410 |
if (control.override) |
|
411 |
dir = control.direction(); |
|
412 |
else |
|
413 |
dir = QChar::DirON; |
|
414 |
status.lastStrong = control.direction(); |
|
415 |
} |
|
416 |
break; |
|
417 |
} |
|
418 |
||
419 |
// strong types |
|
420 |
case QChar::DirL: |
|
421 |
if(dir == QChar::DirON) |
|
422 |
dir = QChar::DirL; |
|
423 |
switch(status.last) |
|
424 |
{
|
|
425 |
case QChar::DirL: |
|
426 |
eor = current; status.eor = QChar::DirL; break; |
|
427 |
case QChar::DirR: |
|
428 |
case QChar::DirAL: |
|
429 |
case QChar::DirEN: |
|
430 |
case QChar::DirAN: |
|
431 |
if (eor >= 0) {
|
|
432 |
appendItems(analysis, sor, eor, control, dir); |
|
433 |
dir = eor < length ? QChar::direction(unicode[eor]) : control.basicDirection(); |
|
434 |
status.eor = dir; |
|
435 |
} else {
|
|
436 |
eor = current; status.eor = dir; |
|
437 |
} |
|
438 |
break; |
|
439 |
case QChar::DirES: |
|
440 |
case QChar::DirET: |
|
441 |
case QChar::DirCS: |
|
442 |
case QChar::DirBN: |
|
443 |
case QChar::DirB: |
|
444 |
case QChar::DirS: |
|
445 |
case QChar::DirWS: |
|
446 |
case QChar::DirON: |
|
447 |
if(dir != QChar::DirL) {
|
|
448 |
//last stuff takes embedding dir |
|
449 |
if(control.direction() == QChar::DirR) {
|
|
450 |
if(status.eor != QChar::DirR) {
|
|
451 |
// AN or EN |
|
452 |
appendItems(analysis, sor, eor, control, dir); |
|
453 |
status.eor = QChar::DirON; |
|
454 |
dir = QChar::DirR; |
|
455 |
} |
|
456 |
eor = current - 1; |
|
457 |
appendItems(analysis, sor, eor, control, dir); |
|
458 |
dir = eor < length ? QChar::direction(unicode[eor]) : control.basicDirection(); |
|
459 |
status.eor = dir; |
|
460 |
} else {
|
|
461 |
if(status.eor != QChar::DirL) {
|
|
462 |
appendItems(analysis, sor, eor, control, dir); |
|
463 |
status.eor = QChar::DirON; |
|
464 |
dir = QChar::DirL; |
|
465 |
} else {
|
|
466 |
eor = current; status.eor = QChar::DirL; break; |
|
467 |
} |
|
468 |
} |
|
469 |
} else {
|
|
470 |
eor = current; status.eor = QChar::DirL; |
|
471 |
} |
|
472 |
default: |
|
473 |
break; |
|
474 |
} |
|
475 |
status.lastStrong = QChar::DirL; |
|
476 |
break; |
|
477 |
case QChar::DirAL: |
|
478 |
case QChar::DirR: |
|
479 |
hasBidi = true; |
|
480 |
if(dir == QChar::DirON) dir = QChar::DirR; |
|
481 |
switch(status.last) |
|
482 |
{
|
|
483 |
case QChar::DirL: |
|
484 |
case QChar::DirEN: |
|
485 |
case QChar::DirAN: |
|
486 |
if (eor >= 0) |
|
487 |
appendItems(analysis, sor, eor, control, dir); |
|
488 |
// fall through |
|
489 |
case QChar::DirR: |
|
490 |
case QChar::DirAL: |
|
491 |
dir = QChar::DirR; eor = current; status.eor = QChar::DirR; break; |
|
492 |
case QChar::DirES: |
|
493 |
case QChar::DirET: |
|
494 |
case QChar::DirCS: |
|
495 |
case QChar::DirBN: |
|
496 |
case QChar::DirB: |
|
497 |
case QChar::DirS: |
|
498 |
case QChar::DirWS: |
|
499 |
case QChar::DirON: |
|
500 |
if(status.eor != QChar::DirR && status.eor != QChar::DirAL) {
|
|
501 |
//last stuff takes embedding dir |
|
502 |
if(control.direction() == QChar::DirR |
|
503 |
|| status.lastStrong == QChar::DirR || status.lastStrong == QChar::DirAL) {
|
|
504 |
appendItems(analysis, sor, eor, control, dir); |
|
505 |
dir = QChar::DirR; status.eor = QChar::DirON; |
|
506 |
eor = current; |
|
507 |
} else {
|
|
508 |
eor = current - 1; |
|
509 |
appendItems(analysis, sor, eor, control, dir); |
|
510 |
dir = QChar::DirR; status.eor = QChar::DirON; |
|
511 |
} |
|
512 |
} else {
|
|
513 |
eor = current; status.eor = QChar::DirR; |
|
514 |
} |
|
515 |
default: |
|
516 |
break; |
|
517 |
} |
|
518 |
status.lastStrong = dirCurrent; |
|
519 |
break; |
|
520 |
||
521 |
// weak types: |
|
522 |
||
523 |
case QChar::DirNSM: |
|
524 |
if (eor == current-1) |
|
525 |
eor = current; |
|
526 |
break; |
|
527 |
case QChar::DirEN: |
|
528 |
// if last strong was AL change EN to AN |
|
529 |
if(status.lastStrong != QChar::DirAL) {
|
|
530 |
if(dir == QChar::DirON) {
|
|
531 |
if(status.lastStrong == QChar::DirL) |
|
532 |
dir = QChar::DirL; |
|
533 |
else |
|
534 |
dir = QChar::DirEN; |
|
535 |
} |
|
536 |
switch(status.last) |
|
537 |
{
|
|
538 |
case QChar::DirET: |
|
539 |
if (status.lastStrong == QChar::DirR || status.lastStrong == QChar::DirAL) {
|
|
540 |
appendItems(analysis, sor, eor, control, dir); |
|
541 |
status.eor = QChar::DirON; |
|
542 |
dir = QChar::DirAN; |
|
543 |
} |
|
544 |
// fall through |
|
545 |
case QChar::DirEN: |
|
546 |
case QChar::DirL: |
|
547 |
eor = current; |
|
548 |
status.eor = dirCurrent; |
|
549 |
break; |
|
550 |
case QChar::DirR: |
|
551 |
case QChar::DirAL: |
|
552 |
case QChar::DirAN: |
|
553 |
if (eor >= 0) |
|
554 |
appendItems(analysis, sor, eor, control, dir); |
|
555 |
else |
|
556 |
eor = current; |
|
557 |
status.eor = QChar::DirEN; |
|
558 |
dir = QChar::DirAN; break; |
|
559 |
case QChar::DirES: |
|
560 |
case QChar::DirCS: |
|
561 |
if(status.eor == QChar::DirEN || dir == QChar::DirAN) {
|
|
562 |
eor = current; break; |
|
563 |
} |
|
564 |
case QChar::DirBN: |
|
565 |
case QChar::DirB: |
|
566 |
case QChar::DirS: |
|
567 |
case QChar::DirWS: |
|
568 |
case QChar::DirON: |
|
569 |
if(status.eor == QChar::DirR) {
|
|
570 |
// neutrals go to R |
|
571 |
eor = current - 1; |
|
572 |
appendItems(analysis, sor, eor, control, dir); |
|
573 |
dir = QChar::DirON; status.eor = QChar::DirEN; |
|
574 |
dir = QChar::DirAN; |
|
575 |
} |
|
576 |
else if(status.eor == QChar::DirL || |
|
577 |
(status.eor == QChar::DirEN && status.lastStrong == QChar::DirL)) {
|
|
578 |
eor = current; status.eor = dirCurrent; |
|
579 |
} else {
|
|
580 |
// numbers on both sides, neutrals get right to left direction |
|
581 |
if(dir != QChar::DirL) {
|
|
582 |
appendItems(analysis, sor, eor, control, dir); |
|
583 |
dir = QChar::DirON; status.eor = QChar::DirON; |
|
584 |
eor = current - 1; |
|
585 |
dir = QChar::DirR; |
|
586 |
appendItems(analysis, sor, eor, control, dir); |
|
587 |
dir = QChar::DirON; status.eor = QChar::DirON; |
|
588 |
dir = QChar::DirAN; |
|
589 |
} else {
|
|
590 |
eor = current; status.eor = dirCurrent; |
|
591 |
} |
|
592 |
} |
|
593 |
default: |
|
594 |
break; |
|
595 |
} |
|
596 |
break; |
|
597 |
} |
|
598 |
case QChar::DirAN: |
|
599 |
hasBidi = true; |
|
600 |
dirCurrent = QChar::DirAN; |
|
601 |
if(dir == QChar::DirON) dir = QChar::DirAN; |
|
602 |
switch(status.last) |
|
603 |
{
|
|
604 |
case QChar::DirL: |
|
605 |
case QChar::DirAN: |
|
606 |
eor = current; status.eor = QChar::DirAN; break; |
|
607 |
case QChar::DirR: |
|
608 |
case QChar::DirAL: |
|
609 |
case QChar::DirEN: |
|
610 |
if (eor >= 0){
|
|
611 |
appendItems(analysis, sor, eor, control, dir); |
|
612 |
} else {
|
|
613 |
eor = current; |
|
614 |
} |
|
615 |
dir = QChar::DirON; status.eor = QChar::DirAN; |
|
616 |
break; |
|
617 |
case QChar::DirCS: |
|
618 |
if(status.eor == QChar::DirAN) {
|
|
619 |
eor = current; break; |
|
620 |
} |
|
621 |
case QChar::DirES: |
|
622 |
case QChar::DirET: |
|
623 |
case QChar::DirBN: |
|
624 |
case QChar::DirB: |
|
625 |
case QChar::DirS: |
|
626 |
case QChar::DirWS: |
|
627 |
case QChar::DirON: |
|
628 |
if(status.eor == QChar::DirR) {
|
|
629 |
// neutrals go to R |
|
630 |
eor = current - 1; |
|
631 |
appendItems(analysis, sor, eor, control, dir); |
|
632 |
status.eor = QChar::DirAN; |
|
633 |
dir = QChar::DirAN; |
|
634 |
} else if(status.eor == QChar::DirL || |
|
635 |
(status.eor == QChar::DirEN && status.lastStrong == QChar::DirL)) {
|
|
636 |
eor = current; status.eor = dirCurrent; |
|
637 |
} else {
|
|
638 |
// numbers on both sides, neutrals get right to left direction |
|
639 |
if(dir != QChar::DirL) {
|
|
640 |
appendItems(analysis, sor, eor, control, dir); |
|
641 |
status.eor = QChar::DirON; |
|
642 |
eor = current - 1; |
|
643 |
dir = QChar::DirR; |
|
644 |
appendItems(analysis, sor, eor, control, dir); |
|
645 |
status.eor = QChar::DirAN; |
|
646 |
dir = QChar::DirAN; |
|
647 |
} else {
|
|
648 |
eor = current; status.eor = dirCurrent; |
|
649 |
} |
|
650 |
} |
|
651 |
default: |
|
652 |
break; |
|
653 |
} |
|
654 |
break; |
|
655 |
case QChar::DirES: |
|
656 |
case QChar::DirCS: |
|
657 |
break; |
|
658 |
case QChar::DirET: |
|
659 |
if(status.last == QChar::DirEN) {
|
|
660 |
dirCurrent = QChar::DirEN; |
|
661 |
eor = current; status.eor = dirCurrent; |
|
662 |
} |
|
663 |
break; |
|
664 |
||
665 |
// boundary neutrals should be ignored |
|
666 |
case QChar::DirBN: |
|
667 |
break; |
|
668 |
// neutrals |
|
669 |
case QChar::DirB: |
|
670 |
// ### what do we do with newline and paragraph separators that come to here? |
|
671 |
break; |
|
672 |
case QChar::DirS: |
|
673 |
// ### implement rule L1 |
|
674 |
break; |
|
675 |
case QChar::DirWS: |
|
676 |
case QChar::DirON: |
|
677 |
break; |
|
678 |
default: |
|
679 |
break; |
|
680 |
} |
|
681 |
||
682 |
//qDebug() << " after: dir=" << // dir << " current=" << dirCurrent << " last=" << status.last << " eor=" << status.eor << " lastStrong=" << status.lastStrong << " embedding=" << control.direction(); |
|
683 |
||
684 |
if(current >= (int)length) break; |
|
685 |
||
686 |
// set status.last as needed. |
|
687 |
switch(dirCurrent) {
|
|
688 |
case QChar::DirET: |
|
689 |
case QChar::DirES: |
|
690 |
case QChar::DirCS: |
|
691 |
case QChar::DirS: |
|
692 |
case QChar::DirWS: |
|
693 |
case QChar::DirON: |
|
694 |
switch(status.last) |
|
695 |
{
|
|
696 |
case QChar::DirL: |
|
697 |
case QChar::DirR: |
|
698 |
case QChar::DirAL: |
|
699 |
case QChar::DirEN: |
|
700 |
case QChar::DirAN: |
|
701 |
status.last = dirCurrent; |
|
702 |
break; |
|
703 |
default: |
|
704 |
status.last = QChar::DirON; |
|
705 |
} |
|
706 |
break; |
|
707 |
case QChar::DirNSM: |
|
708 |
case QChar::DirBN: |
|
709 |
// ignore these |
|
710 |
break; |
|
711 |
case QChar::DirLRO: |
|
712 |
case QChar::DirLRE: |
|
713 |
status.last = QChar::DirL; |
|
714 |
break; |
|
715 |
case QChar::DirRLO: |
|
716 |
case QChar::DirRLE: |
|
717 |
status.last = QChar::DirR; |
|
718 |
break; |
|
719 |
case QChar::DirEN: |
|
720 |
if (status.last == QChar::DirL) {
|
|
721 |
status.last = QChar::DirL; |
|
722 |
break; |
|
723 |
} |
|
724 |
// fall through |
|
725 |
default: |
|
726 |
status.last = dirCurrent; |
|
727 |
} |
|
728 |
||
729 |
++current; |
|
730 |
} |
|
731 |
||
732 |
#if (BIDI_DEBUG >= 1) |
|
733 |
qDebug() << "reached end of line current=" << current << ", eor=" << eor; |
|
734 |
#endif |
|
735 |
eor = current - 1; // remove dummy char |
|
736 |
||
737 |
if (sor <= eor) |
|
738 |
appendItems(analysis, sor, eor, control, dir); |
|
739 |
||
740 |
return hasBidi; |
|
741 |
} |
|
742 |
||
743 |
void QTextEngine::bidiReorder(int numItems, const quint8 *levels, int *visualOrder) |
|
744 |
{
|
|
745 |
||
746 |
// first find highest and lowest levels |
|
747 |
quint8 levelLow = 128; |
|
748 |
quint8 levelHigh = 0; |
|
749 |
int i = 0; |
|
750 |
while (i < numItems) {
|
|
751 |
//printf("level = %d\n", r->level);
|
|
752 |
if (levels[i] > levelHigh) |
|
753 |
levelHigh = levels[i]; |
|
754 |
if (levels[i] < levelLow) |
|
755 |
levelLow = levels[i]; |
|
756 |
i++; |
|
757 |
} |
|
758 |
||
759 |
// implements reordering of the line (L2 according to BiDi spec): |
|
760 |
// L2. From the highest level found in the text to the lowest odd level on each line, |
|
761 |
// reverse any contiguous sequence of characters that are at that level or higher. |
|
762 |
||
763 |
// reversing is only done up to the lowest odd level |
|
764 |
if(!(levelLow%2)) levelLow++; |
|
765 |
||
766 |
#if (BIDI_DEBUG >= 1) |
|
767 |
// qDebug() << "reorderLine: lineLow = " << (uint)levelLow << ", lineHigh = " << (uint)levelHigh; |
|
768 |
#endif |
|
769 |
||
770 |
int count = numItems - 1; |
|
771 |
for (i = 0; i < numItems; i++) |
|
772 |
visualOrder[i] = i; |
|
773 |
||
774 |
while(levelHigh >= levelLow) {
|
|
775 |
int i = 0; |
|
776 |
while (i < count) {
|
|
777 |
while(i < count && levels[i] < levelHigh) i++; |
|
778 |
int start = i; |
|
779 |
while(i <= count && levels[i] >= levelHigh) i++; |
|
780 |
int end = i-1; |
|
781 |
||
782 |
if(start != end) {
|
|
783 |
//qDebug() << "reversing from " << start << " to " << end; |
|
784 |
for(int j = 0; j < (end-start+1)/2; j++) {
|
|
785 |
int tmp = visualOrder[start+j]; |
|
786 |
visualOrder[start+j] = visualOrder[end-j]; |
|
787 |
visualOrder[end-j] = tmp; |
|
788 |
} |
|
789 |
} |
|
790 |
i++; |
|
791 |
} |
|
792 |
levelHigh--; |
|
793 |
} |
|
794 |
||
795 |
#if (BIDI_DEBUG >= 1) |
|
796 |
// qDebug() << "visual order is:"; |
|
797 |
// for (i = 0; i < numItems; i++) |
|
798 |
// qDebug() << visualOrder[i]; |
|
799 |
#endif |
|
800 |
} |
|
801 |
||
802 |
QT_BEGIN_INCLUDE_NAMESPACE |
|
803 |
||
804 |
#if defined(Q_WS_X11) || defined (Q_WS_QWS) |
|
805 |
# include "qfontengine_ft_p.h" |
|
806 |
#elif defined(Q_WS_MAC) |
|
807 |
# include "qtextengine_mac.cpp" |
|
808 |
#endif |
|
809 |
||
810 |
#include <private/qharfbuzz_p.h> |
|
811 |
||
812 |
QT_END_INCLUDE_NAMESPACE |
|
813 |
||
814 |
// ask the font engine to find out which glyphs (as an index in the specific font) to use for the text in one item. |
|
815 |
static bool stringToGlyphs(HB_ShaperItem *item, QGlyphLayout *glyphs, QFontEngine *fontEngine) |
|
816 |
{
|
|
817 |
int nGlyphs = item->num_glyphs; |
|
818 |
||
819 |
QTextEngine::ShaperFlags shaperFlags(QTextEngine::GlyphIndicesOnly); |
|
820 |
if (item->item.bidiLevel % 2) |
|
821 |
shaperFlags |= QTextEngine::RightToLeft; |
|
822 |
||
823 |
bool result = fontEngine->stringToCMap(reinterpret_cast<const QChar *>(item->string + item->item.pos), item->item.length, glyphs, &nGlyphs, shaperFlags); |
|
824 |
item->num_glyphs = nGlyphs; |
|
825 |
glyphs->numGlyphs = nGlyphs; |
|
826 |
return result; |
|
827 |
} |
|
828 |
||
829 |
// shape all the items that intersect with the line, taking tab widths into account to find out what text actually fits in the line. |
|
830 |
void QTextEngine::shapeLine(const QScriptLine &line) |
|
831 |
{
|
|
832 |
QFixed x; |
|
833 |
bool first = true; |
|
834 |
const int end = findItem(line.from + line.length - 1); |
|
835 |
int item = findItem(line.from); |
|
836 |
if (item == -1) |
|
837 |
return; |
|
838 |
for (item = findItem(line.from); item <= end; ++item) {
|
|
839 |
QScriptItem &si = layoutData->items[item]; |
|
840 |
if (si.analysis.flags == QScriptAnalysis::Tab) {
|
|
841 |
ensureSpace(1); |
|
842 |
si.width = calculateTabWidth(item, x); |
|
843 |
} else {
|
|
844 |
shape(item); |
|
845 |
} |
|
846 |
if (first && si.position != line.from) { // that means our x position has to be offset
|
|
847 |
QGlyphLayout glyphs = shapedGlyphs(&si); |
|
848 |
Q_ASSERT(line.from > si.position); |
|
849 |
for (int i = line.from - si.position - 1; i >= 0; i--) {
|
|
850 |
x -= glyphs.effectiveAdvance(i); |
|
851 |
} |
|
852 |
} |
|
853 |
first = false; |
|
854 |
||
855 |
x += si.width; |
|
856 |
} |
|
857 |
} |
|
858 |
||
859 |
extern int qt_defaultDpiY(); // in qfont.cpp |
|
860 |
||
861 |
void QTextEngine::shapeText(int item) const |
|
862 |
{
|
|
863 |
Q_ASSERT(item < layoutData->items.size()); |
|
864 |
QScriptItem &si = layoutData->items[item]; |
|
865 |
||
866 |
if (si.num_glyphs) |
|
867 |
return; |
|
868 |
||
869 |
#if defined(Q_WS_MAC) |
|
870 |
shapeTextMac(item); |
|
871 |
#elif defined(Q_WS_WINCE) |
|
872 |
shapeTextWithCE(item); |
|
873 |
#else |
|
874 |
shapeTextWithHarfbuzz(item); |
|
875 |
#endif |
|
876 |
||
877 |
si.width = 0; |
|
878 |
||
879 |
if (!si.num_glyphs) |
|
880 |
return; |
|
881 |
QGlyphLayout glyphs = shapedGlyphs(&si); |
|
882 |
||
883 |
QFont font = this->font(si); |
|
884 |
bool letterSpacingIsAbsolute = font.d->letterSpacingIsAbsolute; |
|
885 |
QFixed letterSpacing = font.d->letterSpacing; |
|
886 |
QFixed wordSpacing = font.d->wordSpacing; |
|
887 |
||
888 |
if (letterSpacingIsAbsolute) |
|
889 |
letterSpacing *= font.d->dpi / qt_defaultDpiY(); |
|
890 |
||
891 |
if (letterSpacing != 0) {
|
|
892 |
for (int i = 1; i < si.num_glyphs; ++i) {
|
|
893 |
if (glyphs.attributes[i].clusterStart) {
|
|
894 |
if (letterSpacingIsAbsolute) |
|
895 |
glyphs.advances_x[i-1] += letterSpacing; |
|
896 |
else {
|
|
897 |
const QFixed advance = glyphs.advances_x[i-1]; |
|
898 |
glyphs.advances_x[i-1] += (letterSpacing - 100) * advance / 100; |
|
899 |
} |
|
900 |
} |
|
901 |
} |
|
902 |
if (letterSpacingIsAbsolute) |
|
903 |
glyphs.advances_x[si.num_glyphs-1] += letterSpacing; |
|
904 |
else {
|
|
905 |
const QFixed advance = glyphs.advances_x[si.num_glyphs-1]; |
|
906 |
glyphs.advances_x[si.num_glyphs-1] += (letterSpacing - 100) * advance / 100; |
|
907 |
} |
|
908 |
} |
|
909 |
if (wordSpacing != 0) {
|
|
910 |
for (int i = 0; i < si.num_glyphs; ++i) {
|
|
911 |
if (glyphs.attributes[i].justification == HB_Space |
|
912 |
|| glyphs.attributes[i].justification == HB_Arabic_Space) {
|
|
913 |
// word spacing only gets added once to a consecutive run of spaces (see CSS spec) |
|
914 |
if (i + 1 == si.num_glyphs |
|
915 |
||(glyphs.attributes[i+1].justification != HB_Space |
|
916 |
&& glyphs.attributes[i+1].justification != HB_Arabic_Space)) |
|
917 |
glyphs.advances_x[i] += wordSpacing; |
|
918 |
} |
|
919 |
} |
|
920 |
} |
|
921 |
||
922 |
for (int i = 0; i < si.num_glyphs; ++i) |
|
923 |
si.width += glyphs.advances_x[i]; |
|
924 |
} |
|
925 |
||
926 |
#if defined(Q_WS_WINCE) //TODO |
|
927 |
// set the glyph attributes heuristically. Assumes a 1 to 1 relationship between chars and glyphs |
|
928 |
// and no reordering. |
|
929 |
// also computes logClusters heuristically |
|
930 |
static void heuristicSetGlyphAttributes(const QChar *uc, int length, QGlyphLayout *glyphs, unsigned short *logClusters, int num_glyphs) |
|
931 |
{
|
|
932 |
// ### zeroWidth and justification are missing here!!!!! |
|
933 |
||
934 |
Q_UNUSED(num_glyphs); |
|
935 |
Q_ASSERT(num_glyphs <= length); |
|
936 |
||
937 |
// qDebug("QScriptEngine::heuristicSetGlyphAttributes, num_glyphs=%d", item->num_glyphs);
|
|
938 |
||
939 |
int glyph_pos = 0; |
|
940 |
for (int i = 0; i < length; i++) {
|
|
941 |
if (uc[i].unicode() >= 0xd800 && uc[i].unicode() < 0xdc00 && i < length-1 |
|
942 |
&& uc[i+1].unicode() >= 0xdc00 && uc[i+1].unicode() < 0xe000) {
|
|
943 |
logClusters[i] = glyph_pos; |
|
944 |
logClusters[++i] = glyph_pos; |
|
945 |
} else {
|
|
946 |
logClusters[i] = glyph_pos; |
|
947 |
} |
|
948 |
++glyph_pos; |
|
949 |
} |
|
950 |
||
951 |
// first char in a run is never (treated as) a mark |
|
952 |
int cStart = 0; |
|
953 |
||
954 |
const bool symbolFont = false; // #### |
|
955 |
glyphs->attributes[0].mark = false; |
|
956 |
glyphs->attributes[0].clusterStart = true; |
|
957 |
glyphs->attributes[0].dontPrint = (!symbolFont && uc[0].unicode() == 0x00ad) || qIsControlChar(uc[0].unicode()); |
|
958 |
||
959 |
int pos = 0; |
|
960 |
int lastCat = QChar::category(uc[0].unicode()); |
|
961 |
for (int i = 1; i < length; ++i) {
|
|
962 |
if (logClusters[i] == pos) |
|
963 |
// same glyph |
|
964 |
continue; |
|
965 |
++pos; |
|
966 |
while (pos < logClusters[i]) {
|
|
967 |
glyphs[pos].attributes = glyphs[pos-1].attributes; |
|
968 |
++pos; |
|
969 |
} |
|
970 |
// hide soft-hyphens by default |
|
971 |
if ((!symbolFont && uc[i].unicode() == 0x00ad) || qIsControlChar(uc[i].unicode())) |
|
972 |
glyphs->attributes[pos].dontPrint = true; |
|
973 |
const QUnicodeTables::Properties *prop = QUnicodeTables::properties(uc[i].unicode()); |
|
974 |
int cat = prop->category; |
|
975 |
if (cat != QChar::Mark_NonSpacing) {
|
|
976 |
glyphs->attributes[pos].mark = false; |
|
977 |
glyphs->attributes[pos].clusterStart = true; |
|
978 |
glyphs->attributes[pos].combiningClass = 0; |
|
979 |
cStart = logClusters[i]; |
|
980 |
} else {
|
|
981 |
int cmb = prop->combiningClass; |
|
982 |
||
983 |
if (cmb == 0) {
|
|
984 |
// Fix 0 combining classes |
|
985 |
if ((uc[pos].unicode() & 0xff00) == 0x0e00) {
|
|
986 |
// thai or lao |
|
987 |
unsigned char col = uc[pos].cell(); |
|
988 |
if (col == 0x31 || |
|
989 |
col == 0x34 || |
|
990 |
col == 0x35 || |
|
991 |
col == 0x36 || |
|
992 |
col == 0x37 || |
|
993 |
col == 0x47 || |
|
994 |
col == 0x4c || |
|
995 |
col == 0x4d || |
|
996 |
col == 0x4e) {
|
|
997 |
cmb = QChar::Combining_AboveRight; |
|
998 |
} else if (col == 0xb1 || |
|
999 |
col == 0xb4 || |
|
1000 |
col == 0xb5 || |
|
1001 |
col == 0xb6 || |
|
1002 |
col == 0xb7 || |
|
1003 |
col == 0xbb || |
|
1004 |
col == 0xcc || |
|
1005 |
col == 0xcd) {
|
|
1006 |
cmb = QChar::Combining_Above; |
|
1007 |
} else if (col == 0xbc) {
|
|
1008 |
cmb = QChar::Combining_Below; |
|
1009 |
} |
|
1010 |
} |
|
1011 |
} |
|
1012 |
||
1013 |
glyphs->attributes[pos].mark = true; |
|
1014 |
glyphs->attributes[pos].clusterStart = false; |
|
1015 |
glyphs->attributes[pos].combiningClass = cmb; |
|
1016 |
logClusters[i] = cStart; |
|
1017 |
glyphs->advances_x[pos] = 0; |
|
1018 |
glyphs->advances_y[pos] = 0; |
|
1019 |
} |
|
1020 |
||
1021 |
// one gets an inter character justification point if the current char is not a non spacing mark. |
|
1022 |
// as then the current char belongs to the last one and one gets a space justification point |
|
1023 |
// after the space char. |
|
1024 |
if (lastCat == QChar::Separator_Space) |
|
1025 |
glyphs->attributes[pos-1].justification = HB_Space; |
|
1026 |
else if (cat != QChar::Mark_NonSpacing) |
|
1027 |
glyphs->attributes[pos-1].justification = HB_Character; |
|
1028 |
else |
|
1029 |
glyphs->attributes[pos-1].justification = HB_NoJustification; |
|
1030 |
||
1031 |
lastCat = cat; |
|
1032 |
} |
|
1033 |
pos = logClusters[length-1]; |
|
1034 |
if (lastCat == QChar::Separator_Space) |
|
1035 |
glyphs->attributes[pos].justification = HB_Space; |
|
1036 |
else |
|
1037 |
glyphs->attributes[pos].justification = HB_Character; |
|
1038 |
} |
|
1039 |
||
1040 |
void QTextEngine::shapeTextWithCE(int item) const |
|
1041 |
{
|
|
1042 |
QScriptItem &si = layoutData->items[item]; |
|
1043 |
si.glyph_data_offset = layoutData->used; |
|
1044 |
||
|
3
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1045 |
QFontEngine *fe = fontEngine(si, &si.ascent, &si.descent, &si.leading); |
| 0 | 1046 |
|
1047 |
QTextEngine::ShaperFlags flags; |
|
1048 |
if (si.analysis.bidiLevel % 2) |
|
1049 |
flags |= RightToLeft; |
|
1050 |
if (option.useDesignMetrics()) |
|
1051 |
flags |= DesignMetrics; |
|
1052 |
||
1053 |
attributes(); // pre-initialize char attributes |
|
1054 |
||
1055 |
const int len = length(item); |
|
1056 |
int num_glyphs = length(item); |
|
1057 |
const QChar *str = layoutData->string.unicode() + si.position; |
|
1058 |
ushort upperCased[256]; |
|
1059 |
if (si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase |
|
1060 |
|| si.analysis.flags == QScriptAnalysis::Lowercase) {
|
|
1061 |
ushort *uc = upperCased; |
|
1062 |
if (len > 256) |
|
1063 |
uc = new ushort[len]; |
|
1064 |
for (int i = 0; i < len; ++i) {
|
|
1065 |
if(si.analysis.flags == QScriptAnalysis::Lowercase) |
|
1066 |
uc[i] = str[i].toLower().unicode(); |
|
1067 |
else |
|
1068 |
uc[i] = str[i].toUpper().unicode(); |
|
1069 |
} |
|
1070 |
str = reinterpret_cast<const QChar *>(uc); |
|
1071 |
} |
|
1072 |
||
1073 |
while (true) {
|
|
1074 |
ensureSpace(num_glyphs); |
|
1075 |
num_glyphs = layoutData->glyphLayout.numGlyphs - layoutData->used; |
|
1076 |
||
1077 |
QGlyphLayout g = availableGlyphs(&si); |
|
1078 |
unsigned short *log_clusters = logClusters(&si); |
|
1079 |
||
1080 |
if (fe->stringToCMap(str, |
|
1081 |
len, |
|
1082 |
&g, |
|
1083 |
&num_glyphs, |
|
1084 |
flags)) {
|
|
1085 |
heuristicSetGlyphAttributes(str, len, &g, log_clusters, num_glyphs); |
|
1086 |
break; |
|
1087 |
} |
|
1088 |
} |
|
1089 |
||
1090 |
si.num_glyphs = num_glyphs; |
|
1091 |
||
1092 |
layoutData->used += si.num_glyphs; |
|
1093 |
||
1094 |
const ushort *uc = reinterpret_cast<const ushort *>(str); |
|
1095 |
if ((si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase |
|
1096 |
|| si.analysis.flags == QScriptAnalysis::Lowercase) |
|
1097 |
&& uc != upperCased) |
|
1098 |
delete [] uc; |
|
1099 |
} |
|
1100 |
#endif |
|
1101 |
||
1102 |
static inline void moveGlyphData(const QGlyphLayout &destination, const QGlyphLayout &source, int num) |
|
1103 |
{
|
|
1104 |
if (num > 0 && destination.glyphs != source.glyphs) {
|
|
1105 |
memmove(destination.glyphs, source.glyphs, num * sizeof(HB_Glyph)); |
|
1106 |
memmove(destination.attributes, source.attributes, num * sizeof(HB_GlyphAttributes)); |
|
1107 |
memmove(destination.advances_x, source.advances_x, num * sizeof(HB_Fixed)); |
|
1108 |
memmove(destination.offsets, source.offsets, num * sizeof(HB_FixedPoint)); |
|
1109 |
} |
|
1110 |
} |
|
1111 |
||
1112 |
/// take the item from layoutData->items and |
|
1113 |
void QTextEngine::shapeTextWithHarfbuzz(int item) const |
|
1114 |
{
|
|
1115 |
Q_ASSERT(sizeof(HB_Fixed) == sizeof(QFixed)); |
|
1116 |
Q_ASSERT(sizeof(HB_FixedPoint) == sizeof(QFixedPoint)); |
|
1117 |
||
1118 |
QScriptItem &si = layoutData->items[item]; |
|
1119 |
||
1120 |
si.glyph_data_offset = layoutData->used; |
|
1121 |
||
|
3
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1122 |
QFontEngine *font = fontEngine(si, &si.ascent, &si.descent, &si.leading); |
| 0 | 1123 |
|
1124 |
bool kerningEnabled = this->font(si).d->kerning; |
|
1125 |
||
1126 |
HB_ShaperItem entire_shaper_item; |
|
1127 |
entire_shaper_item.kerning_applied = false; |
|
1128 |
entire_shaper_item.string = reinterpret_cast<const HB_UChar16 *>(layoutData->string.constData()); |
|
1129 |
entire_shaper_item.stringLength = layoutData->string.length(); |
|
1130 |
entire_shaper_item.item.script = (HB_Script)si.analysis.script; |
|
1131 |
entire_shaper_item.item.pos = si.position; |
|
1132 |
entire_shaper_item.item.length = length(item); |
|
1133 |
entire_shaper_item.item.bidiLevel = si.analysis.bidiLevel; |
|
1134 |
entire_shaper_item.glyphIndicesPresent = false; |
|
1135 |
||
1136 |
HB_UChar16 upperCased[256]; // XXX what about making this 4096, so we don't have to extend it ever. |
|
1137 |
if (si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase |
|
1138 |
|| si.analysis.flags == QScriptAnalysis::Lowercase) {
|
|
1139 |
HB_UChar16 *uc = upperCased; |
|
1140 |
if (entire_shaper_item.item.length > 256) |
|
1141 |
uc = new HB_UChar16[entire_shaper_item.item.length]; |
|
1142 |
for (uint i = 0; i < entire_shaper_item.item.length; ++i) {
|
|
1143 |
if(si.analysis.flags == QScriptAnalysis::Lowercase) |
|
1144 |
uc[i] = QChar::toLower(entire_shaper_item.string[si.position + i]); |
|
1145 |
else |
|
1146 |
uc[i] = QChar::toUpper(entire_shaper_item.string[si.position + i]); |
|
1147 |
} |
|
1148 |
entire_shaper_item.item.pos = 0; |
|
1149 |
entire_shaper_item.string = uc; |
|
1150 |
entire_shaper_item.stringLength = entire_shaper_item.item.length; |
|
1151 |
} |
|
1152 |
||
1153 |
entire_shaper_item.shaperFlags = 0; |
|
1154 |
if (!kerningEnabled) |
|
1155 |
entire_shaper_item.shaperFlags |= HB_ShaperFlag_NoKerning; |
|
1156 |
if (option.useDesignMetrics()) |
|
1157 |
entire_shaper_item.shaperFlags |= HB_ShaperFlag_UseDesignMetrics; |
|
1158 |
||
1159 |
entire_shaper_item.num_glyphs = qMax(layoutData->glyphLayout.numGlyphs - layoutData->used, int(entire_shaper_item.item.length)); |
|
1160 |
ensureSpace(entire_shaper_item.num_glyphs); |
|
1161 |
QGlyphLayout initialGlyphs = availableGlyphs(&si).mid(0, entire_shaper_item.num_glyphs); |
|
1162 |
||
1163 |
if (!stringToGlyphs(&entire_shaper_item, &initialGlyphs, font)) {
|
|
1164 |
ensureSpace(entire_shaper_item.num_glyphs); |
|
1165 |
initialGlyphs = availableGlyphs(&si).mid(0, entire_shaper_item.num_glyphs); |
|
1166 |
||
1167 |
if (!stringToGlyphs(&entire_shaper_item, &initialGlyphs, font)) {
|
|
1168 |
// ############ if this happens there's a bug in the fontengine |
|
1169 |
if ((si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase |
|
1170 |
|| si.analysis.flags == QScriptAnalysis::Lowercase) && entire_shaper_item.string != upperCased) |
|
1171 |
delete [] const_cast<HB_UChar16 *>(entire_shaper_item.string); |
|
1172 |
return; |
|
1173 |
} |
|
1174 |
} |
|
1175 |
||
1176 |
// split up the item into parts that come from different font engines. |
|
1177 |
QVarLengthArray<int> itemBoundaries(2); |
|
1178 |
// k * 2 entries, array[k] == index in string, array[k + 1] == index in glyphs |
|
1179 |
itemBoundaries[0] = entire_shaper_item.item.pos; |
|
1180 |
itemBoundaries[1] = 0; |
|
1181 |
||
1182 |
if (font->type() == QFontEngine::Multi) {
|
|
1183 |
uint lastEngine = 0; |
|
1184 |
int charIdx = entire_shaper_item.item.pos; |
|
1185 |
const int stringEnd = charIdx + entire_shaper_item.item.length; |
|
1186 |
for (quint32 i = 0; i < entire_shaper_item.num_glyphs; ++i, ++charIdx) {
|
|
1187 |
uint engineIdx = initialGlyphs.glyphs[i] >> 24; |
|
1188 |
if (engineIdx != lastEngine && i > 0) {
|
|
1189 |
itemBoundaries.append(charIdx); |
|
1190 |
itemBoundaries.append(i); |
|
1191 |
} |
|
1192 |
lastEngine = engineIdx; |
|
1193 |
if (HB_IsHighSurrogate(entire_shaper_item.string[charIdx]) |
|
1194 |
&& charIdx < stringEnd - 1 |
|
1195 |
&& HB_IsLowSurrogate(entire_shaper_item.string[charIdx + 1])) |
|
1196 |
++charIdx; |
|
1197 |
} |
|
1198 |
} |
|
1199 |
||
1200 |
||
1201 |
||
1202 |
int remaining_glyphs = entire_shaper_item.num_glyphs; |
|
1203 |
int glyph_pos = 0; |
|
1204 |
// for each item shape using harfbuzz and store the results in our layoutData's glyphs array. |
|
1205 |
for (int k = 0; k < itemBoundaries.size(); k += 2) { // for the +2, see the comment at the definition of itemBoundaries
|
|
1206 |
||
1207 |
HB_ShaperItem shaper_item = entire_shaper_item; |
|
1208 |
||
1209 |
shaper_item.item.pos = itemBoundaries[k]; |
|
1210 |
if (k < itemBoundaries.size() - 3) {
|
|
1211 |
shaper_item.item.length = itemBoundaries[k + 2] - shaper_item.item.pos; |
|
1212 |
shaper_item.num_glyphs = itemBoundaries[k + 3] - itemBoundaries[k + 1]; |
|
1213 |
} else { // last combo in the list, avoid out of bounds access.
|
|
1214 |
shaper_item.item.length -= shaper_item.item.pos - entire_shaper_item.item.pos; |
|
1215 |
shaper_item.num_glyphs -= itemBoundaries[k + 1]; |
|
1216 |
} |
|
1217 |
shaper_item.initialGlyphCount = shaper_item.num_glyphs; |
|
1218 |
||
1219 |
QFontEngine *actualFontEngine = font; |
|
1220 |
uint engineIdx = 0; |
|
1221 |
if (font->type() == QFontEngine::Multi) {
|
|
1222 |
engineIdx = uint(availableGlyphs(&si).glyphs[glyph_pos] >> 24); |
|
1223 |
||
1224 |
actualFontEngine = static_cast<QFontEngineMulti *>(font)->engine(engineIdx); |
|
1225 |
} |
|
1226 |
||
1227 |
shaper_item.font = actualFontEngine->harfbuzzFont(); |
|
1228 |
shaper_item.face = actualFontEngine->harfbuzzFace(); |
|
1229 |
||
1230 |
shaper_item.glyphIndicesPresent = true; |
|
1231 |
||
1232 |
remaining_glyphs -= shaper_item.initialGlyphCount; |
|
1233 |
||
1234 |
do {
|
|
1235 |
ensureSpace(glyph_pos + shaper_item.num_glyphs + remaining_glyphs); |
|
1236 |
||
1237 |
const QGlyphLayout g = availableGlyphs(&si).mid(glyph_pos); |
|
1238 |
moveGlyphData(g.mid(shaper_item.num_glyphs), g.mid(shaper_item.initialGlyphCount), remaining_glyphs); |
|
1239 |
||
1240 |
shaper_item.glyphs = g.glyphs; |
|
1241 |
shaper_item.attributes = g.attributes; |
|
1242 |
shaper_item.advances = reinterpret_cast<HB_Fixed *>(g.advances_x); |
|
1243 |
shaper_item.offsets = reinterpret_cast<HB_FixedPoint *>(g.offsets); |
|
1244 |
||
1245 |
if (shaper_item.glyphIndicesPresent) {
|
|
1246 |
for (hb_uint32 i = 0; i < shaper_item.initialGlyphCount; ++i) |
|
1247 |
shaper_item.glyphs[i] &= 0x00ffffff; |
|
1248 |
} |
|
1249 |
||
1250 |
shaper_item.log_clusters = logClusters(&si) + shaper_item.item.pos - entire_shaper_item.item.pos; |
|
1251 |
||
1252 |
// qDebug(" .. num_glyphs=%d, used=%d, item.num_glyphs=%d", num_glyphs, used, shaper_item.num_glyphs);
|
|
1253 |
} while (!qShapeItem(&shaper_item)); // this does the actual shaping via harfbuzz. |
|
1254 |
||
1255 |
QGlyphLayout g = availableGlyphs(&si).mid(glyph_pos, shaper_item.num_glyphs); |
|
1256 |
moveGlyphData(g.mid(shaper_item.num_glyphs), g.mid(shaper_item.initialGlyphCount), remaining_glyphs); |
|
1257 |
||
1258 |
for (hb_uint32 i = 0; i < shaper_item.num_glyphs; ++i) |
|
1259 |
g.glyphs[i] = g.glyphs[i] | (engineIdx << 24); |
|
1260 |
||
1261 |
for (hb_uint32 i = 0; i < shaper_item.item.length; ++i) |
|
1262 |
shaper_item.log_clusters[i] += glyph_pos; |
|
1263 |
||
1264 |
if (kerningEnabled && !shaper_item.kerning_applied) |
|
1265 |
font->doKerning(&g, option.useDesignMetrics() ? QFlag(QTextEngine::DesignMetrics) : QFlag(0)); |
|
1266 |
||
1267 |
glyph_pos += shaper_item.num_glyphs; |
|
1268 |
} |
|
1269 |
||
1270 |
// qDebug(" -> item: script=%d num_glyphs=%d", shaper_item.script, shaper_item.num_glyphs);
|
|
1271 |
si.num_glyphs = glyph_pos; |
|
1272 |
||
1273 |
layoutData->used += si.num_glyphs; |
|
1274 |
||
1275 |
if ((si.analysis.flags == QScriptAnalysis::SmallCaps || si.analysis.flags == QScriptAnalysis::Uppercase) |
|
1276 |
&& entire_shaper_item.string != upperCased) |
|
1277 |
delete [] const_cast<HB_UChar16 *>(entire_shaper_item.string); |
|
1278 |
} |
|
1279 |
||
1280 |
static void init(QTextEngine *e) |
|
1281 |
{
|
|
1282 |
e->ignoreBidi = false; |
|
1283 |
e->cacheGlyphs = false; |
|
1284 |
e->forceJustification = false; |
|
1285 |
||
1286 |
e->layoutData = 0; |
|
1287 |
||
1288 |
e->minWidth = 0; |
|
1289 |
e->maxWidth = 0; |
|
1290 |
||
1291 |
e->underlinePositions = 0; |
|
1292 |
e->specialData = 0; |
|
1293 |
e->stackEngine = false; |
|
1294 |
} |
|
1295 |
||
1296 |
QTextEngine::QTextEngine() |
|
1297 |
{
|
|
1298 |
init(this); |
|
1299 |
} |
|
1300 |
||
1301 |
QTextEngine::QTextEngine(const QString &str, const QFont &f) |
|
1302 |
: fnt(f) |
|
1303 |
{
|
|
1304 |
init(this); |
|
1305 |
text = str; |
|
1306 |
} |
|
1307 |
||
1308 |
QTextEngine::~QTextEngine() |
|
1309 |
{
|
|
1310 |
if (!stackEngine) |
|
1311 |
delete layoutData; |
|
1312 |
delete specialData; |
|
1313 |
} |
|
1314 |
||
1315 |
const HB_CharAttributes *QTextEngine::attributes() const |
|
1316 |
{
|
|
1317 |
if (layoutData && layoutData->haveCharAttributes) |
|
1318 |
return (HB_CharAttributes *) layoutData->memory; |
|
1319 |
||
1320 |
itemize(); |
|
1321 |
ensureSpace(layoutData->string.length()); |
|
1322 |
||
1323 |
QVarLengthArray<HB_ScriptItem> hbScriptItems(layoutData->items.size()); |
|
1324 |
||
1325 |
for (int i = 0; i < layoutData->items.size(); ++i) {
|
|
1326 |
const QScriptItem &si = layoutData->items[i]; |
|
1327 |
hbScriptItems[i].pos = si.position; |
|
1328 |
hbScriptItems[i].length = length(i); |
|
1329 |
hbScriptItems[i].bidiLevel = si.analysis.bidiLevel; |
|
1330 |
hbScriptItems[i].script = (HB_Script)si.analysis.script; |
|
1331 |
} |
|
1332 |
||
1333 |
qGetCharAttributes(reinterpret_cast<const HB_UChar16 *>(layoutData->string.constData()), |
|
1334 |
layoutData->string.length(), |
|
1335 |
hbScriptItems.data(), hbScriptItems.size(), |
|
1336 |
(HB_CharAttributes *)layoutData->memory); |
|
1337 |
||
1338 |
||
1339 |
layoutData->haveCharAttributes = true; |
|
1340 |
return (HB_CharAttributes *) layoutData->memory; |
|
1341 |
} |
|
1342 |
||
1343 |
void QTextEngine::shape(int item) const |
|
1344 |
{
|
|
1345 |
if (layoutData->items[item].analysis.flags == QScriptAnalysis::Object) {
|
|
1346 |
ensureSpace(1); |
|
1347 |
if (block.docHandle()) {
|
|
1348 |
QTextFormat format = formats()->format(formatIndex(&layoutData->items[item])); |
|
1349 |
docLayout()->resizeInlineObject(QTextInlineObject(item, const_cast<QTextEngine *>(this)), |
|
1350 |
layoutData->items[item].position + block.position(), format); |
|
1351 |
} |
|
1352 |
} else if (layoutData->items[item].analysis.flags == QScriptAnalysis::Tab) {
|
|
|
3
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1353 |
// set up at least the ascent/descent/leading of the script item for the tab |
|
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1354 |
fontEngine(layoutData->items[item], |
|
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1355 |
&layoutData->items[item].ascent, |
|
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1356 |
&layoutData->items[item].descent, |
|
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1357 |
&layoutData->items[item].leading); |
| 0 | 1358 |
} else {
|
1359 |
shapeText(item); |
|
1360 |
} |
|
1361 |
} |
|
1362 |
||
1363 |
void QTextEngine::invalidate() |
|
1364 |
{
|
|
1365 |
freeMemory(); |
|
1366 |
minWidth = 0; |
|
1367 |
maxWidth = 0; |
|
1368 |
if (specialData) |
|
1369 |
specialData->resolvedFormatIndices.clear(); |
|
1370 |
} |
|
1371 |
||
1372 |
void QTextEngine::clearLineData() |
|
1373 |
{
|
|
1374 |
lines.clear(); |
|
1375 |
} |
|
1376 |
||
1377 |
void QTextEngine::validate() const |
|
1378 |
{
|
|
1379 |
if (layoutData) |
|
1380 |
return; |
|
1381 |
layoutData = new LayoutData(); |
|
1382 |
if (block.docHandle()) {
|
|
1383 |
layoutData->string = block.text(); |
|
1384 |
if (option.flags() & QTextOption::ShowLineAndParagraphSeparators) |
|
1385 |
layoutData->string += QLatin1Char(block.next().isValid() ? 0xb6 : 0x20); |
|
1386 |
} else {
|
|
1387 |
layoutData->string = text; |
|
1388 |
} |
|
1389 |
if (specialData && specialData->preeditPosition != -1) |
|
1390 |
layoutData->string.insert(specialData->preeditPosition, specialData->preeditText); |
|
1391 |
} |
|
1392 |
||
1393 |
void QTextEngine::itemize() const |
|
1394 |
{
|
|
1395 |
validate(); |
|
1396 |
if (layoutData->items.size()) |
|
1397 |
return; |
|
1398 |
||
1399 |
int length = layoutData->string.length(); |
|
1400 |
if (!length) |
|
1401 |
return; |
|
1402 |
#if defined(Q_WS_MAC) && !defined(QT_MAC_USE_COCOA) |
|
1403 |
// ATSUI requires RTL flags to correctly identify the character stops. |
|
1404 |
bool ignore = false; |
|
1405 |
#else |
|
1406 |
bool ignore = ignoreBidi; |
|
1407 |
#endif |
|
1408 |
if (!ignore && option.textDirection() == Qt::LeftToRight) {
|
|
1409 |
ignore = true; |
|
1410 |
const QChar *start = layoutData->string.unicode(); |
|
1411 |
const QChar * const end = start + length; |
|
1412 |
while (start < end) {
|
|
1413 |
if (start->unicode() >= 0x590) {
|
|
1414 |
ignore = false; |
|
1415 |
break; |
|
1416 |
} |
|
1417 |
++start; |
|
1418 |
} |
|
1419 |
} |
|
1420 |
||
1421 |
QVarLengthArray<QScriptAnalysis, 4096> scriptAnalysis(length); |
|
1422 |
QScriptAnalysis *analysis = scriptAnalysis.data(); |
|
1423 |
||
1424 |
QBidiControl control(option.textDirection() == Qt::RightToLeft); |
|
1425 |
||
1426 |
if (ignore) {
|
|
1427 |
memset(analysis, 0, length*sizeof(QScriptAnalysis)); |
|
1428 |
if (option.textDirection() == Qt::RightToLeft) {
|
|
1429 |
for (int i = 0; i < length; ++i) |
|
1430 |
analysis[i].bidiLevel = 1; |
|
1431 |
layoutData->hasBidi = true; |
|
1432 |
} |
|
1433 |
} else {
|
|
1434 |
layoutData->hasBidi = bidiItemize(const_cast<QTextEngine *>(this), analysis, control); |
|
1435 |
} |
|
1436 |
||
1437 |
const ushort *unicode = layoutData->string.utf16(); |
|
1438 |
// correctly assign script, isTab and isObject to the script analysis |
|
1439 |
const ushort *uc = unicode; |
|
1440 |
const ushort *e = uc + length; |
|
1441 |
int lastScript = QUnicodeTables::Common; |
|
1442 |
while (uc < e) {
|
|
1443 |
int script = QUnicodeTables::script(*uc); |
|
1444 |
if (script == QUnicodeTables::Inherited) |
|
1445 |
script = lastScript; |
|
1446 |
analysis->flags = QScriptAnalysis::None; |
|
1447 |
if (*uc == QChar::ObjectReplacementCharacter) {
|
|
1448 |
if (analysis->bidiLevel % 2) |
|
1449 |
--analysis->bidiLevel; |
|
1450 |
analysis->script = QUnicodeTables::Common; |
|
1451 |
analysis->flags = QScriptAnalysis::Object; |
|
1452 |
} else if (*uc == QChar::LineSeparator) {
|
|
1453 |
if (analysis->bidiLevel % 2) |
|
1454 |
--analysis->bidiLevel; |
|
1455 |
analysis->script = QUnicodeTables::Common; |
|
1456 |
analysis->flags = QScriptAnalysis::LineOrParagraphSeparator; |
|
1457 |
if (option.flags() & QTextOption::ShowLineAndParagraphSeparators) |
|
1458 |
*const_cast<ushort*>(uc) = 0x21B5; // visual line separator |
|
1459 |
} else if (*uc == 9) {
|
|
1460 |
analysis->script = QUnicodeTables::Common; |
|
1461 |
analysis->flags = QScriptAnalysis::Tab; |
|
1462 |
analysis->bidiLevel = control.baseLevel(); |
|
1463 |
} else if ((*uc == 32 || *uc == QChar::Nbsp) |
|
1464 |
&& (option.flags() & QTextOption::ShowTabsAndSpaces)) {
|
|
1465 |
analysis->script = QUnicodeTables::Common; |
|
1466 |
analysis->flags = QScriptAnalysis::Space; |
|
1467 |
analysis->bidiLevel = control.baseLevel(); |
|
1468 |
} else {
|
|
1469 |
analysis->script = script; |
|
1470 |
} |
|
1471 |
lastScript = analysis->script; |
|
1472 |
++uc; |
|
1473 |
++analysis; |
|
1474 |
} |
|
1475 |
if (option.flags() & QTextOption::ShowLineAndParagraphSeparators) {
|
|
1476 |
(analysis-1)->flags = QScriptAnalysis::LineOrParagraphSeparator; // to exclude it from width |
|
1477 |
} |
|
1478 |
||
1479 |
Itemizer itemizer(layoutData->string, scriptAnalysis.data(), layoutData->items); |
|
1480 |
||
1481 |
const QTextDocumentPrivate *p = block.docHandle(); |
|
1482 |
if (p) {
|
|
1483 |
SpecialData *s = specialData; |
|
1484 |
||
1485 |
QTextDocumentPrivate::FragmentIterator it = p->find(block.position()); |
|
1486 |
QTextDocumentPrivate::FragmentIterator end = p->find(block.position() + block.length() - 1); // -1 to omit the block separator char |
|
1487 |
int format = it.value()->format; |
|
1488 |
||
1489 |
int prevPosition = 0; |
|
1490 |
int position = prevPosition; |
|
1491 |
while (1) {
|
|
1492 |
const QTextFragmentData * const frag = it.value(); |
|
1493 |
if (it == end || format != frag->format) {
|
|
1494 |
if (s && position >= s->preeditPosition) {
|
|
1495 |
position += s->preeditText.length(); |
|
1496 |
s = 0; |
|
1497 |
} |
|
1498 |
Q_ASSERT(position <= length); |
|
1499 |
itemizer.generate(prevPosition, position - prevPosition, |
|
1500 |
formats()->charFormat(format).fontCapitalization()); |
|
1501 |
if (it == end) {
|
|
1502 |
if (position < length) |
|
1503 |
itemizer.generate(position, length - position, |
|
1504 |
formats()->charFormat(format).fontCapitalization()); |
|
1505 |
break; |
|
1506 |
} |
|
1507 |
format = frag->format; |
|
1508 |
prevPosition = position; |
|
1509 |
} |
|
1510 |
position += frag->size_array[0]; |
|
1511 |
++it; |
|
1512 |
} |
|
1513 |
} else {
|
|
1514 |
itemizer.generate(0, length, static_cast<QFont::Capitalization> (fnt.d->capital)); |
|
1515 |
} |
|
1516 |
||
1517 |
addRequiredBoundaries(); |
|
1518 |
resolveAdditionalFormats(); |
|
1519 |
} |
|
1520 |
||
1521 |
int QTextEngine::findItem(int strPos) const |
|
1522 |
{
|
|
1523 |
itemize(); |
|
1524 |
||
1525 |
// ##### use binary search |
|
1526 |
int item; |
|
1527 |
for (item = layoutData->items.size()-1; item > 0; --item) {
|
|
1528 |
if (layoutData->items[item].position <= strPos) |
|
1529 |
break; |
|
1530 |
} |
|
1531 |
return item; |
|
1532 |
} |
|
1533 |
||
1534 |
QFixed QTextEngine::width(int from, int len) const |
|
1535 |
{
|
|
1536 |
itemize(); |
|
1537 |
||
1538 |
QFixed w = 0; |
|
1539 |
||
1540 |
// qDebug("QTextEngine::width(from = %d, len = %d), numItems=%d, strleng=%d", from, len, items.size(), string.length());
|
|
1541 |
for (int i = 0; i < layoutData->items.size(); i++) {
|
|
1542 |
const QScriptItem *si = layoutData->items.constData() + i; |
|
1543 |
int pos = si->position; |
|
1544 |
int ilen = length(i); |
|
1545 |
// qDebug("item %d: from %d len %d", i, pos, ilen);
|
|
1546 |
if (pos >= from + len) |
|
1547 |
break; |
|
1548 |
if (pos + ilen > from) {
|
|
1549 |
if (!si->num_glyphs) |
|
1550 |
shape(i); |
|
1551 |
||
1552 |
if (si->analysis.flags == QScriptAnalysis::Object) {
|
|
1553 |
w += si->width; |
|
1554 |
continue; |
|
1555 |
} else if (si->analysis.flags == QScriptAnalysis::Tab) {
|
|
1556 |
w += calculateTabWidth(i, w); |
|
1557 |
continue; |
|
1558 |
} |
|
1559 |
||
1560 |
||
1561 |
QGlyphLayout glyphs = shapedGlyphs(si); |
|
1562 |
unsigned short *logClusters = this->logClusters(si); |
|
1563 |
||
1564 |
// fprintf(stderr, " logclusters:"); |
|
1565 |
// for (int k = 0; k < ilen; k++) |
|
1566 |
// fprintf(stderr, " %d", logClusters[k]); |
|
1567 |
// fprintf(stderr, "\n"); |
|
1568 |
// do the simple thing for now and give the first glyph in a cluster the full width, all other ones 0. |
|
1569 |
int charFrom = from - pos; |
|
1570 |
if (charFrom < 0) |
|
1571 |
charFrom = 0; |
|
1572 |
int glyphStart = logClusters[charFrom]; |
|
1573 |
if (charFrom > 0 && logClusters[charFrom-1] == glyphStart) |
|
1574 |
while (charFrom < ilen && logClusters[charFrom] == glyphStart) |
|
1575 |
charFrom++; |
|
1576 |
if (charFrom < ilen) {
|
|
1577 |
glyphStart = logClusters[charFrom]; |
|
1578 |
int charEnd = from + len - 1 - pos; |
|
1579 |
if (charEnd >= ilen) |
|
1580 |
charEnd = ilen-1; |
|
1581 |
int glyphEnd = logClusters[charEnd]; |
|
1582 |
while (charEnd < ilen && logClusters[charEnd] == glyphEnd) |
|
1583 |
charEnd++; |
|
1584 |
glyphEnd = (charEnd == ilen) ? si->num_glyphs : logClusters[charEnd]; |
|
1585 |
||
1586 |
// qDebug("char: start=%d end=%d / glyph: start = %d, end = %d", charFrom, charEnd, glyphStart, glyphEnd);
|
|
1587 |
for (int i = glyphStart; i < glyphEnd; i++) |
|
1588 |
w += glyphs.advances_x[i] * !glyphs.attributes[i].dontPrint; |
|
1589 |
} |
|
1590 |
} |
|
1591 |
} |
|
1592 |
// qDebug(" --> w= %d ", w);
|
|
1593 |
return w; |
|
1594 |
} |
|
1595 |
||
1596 |
glyph_metrics_t QTextEngine::boundingBox(int from, int len) const |
|
1597 |
{
|
|
1598 |
itemize(); |
|
1599 |
||
1600 |
glyph_metrics_t gm; |
|
1601 |
||
1602 |
for (int i = 0; i < layoutData->items.size(); i++) {
|
|
1603 |
const QScriptItem *si = layoutData->items.constData() + i; |
|
1604 |
QFontEngine *fe = fontEngine(*si); |
|
1605 |
||
1606 |
int pos = si->position; |
|
1607 |
int ilen = length(i); |
|
1608 |
if (pos > from + len) |
|
1609 |
break; |
|
1610 |
if (pos + ilen > from) {
|
|
1611 |
if (!si->num_glyphs) |
|
1612 |
shape(i); |
|
1613 |
||
1614 |
if (si->analysis.flags == QScriptAnalysis::Object) {
|
|
1615 |
gm.width += si->width; |
|
1616 |
continue; |
|
1617 |
} else if (si->analysis.flags == QScriptAnalysis::Tab) {
|
|
1618 |
gm.width += calculateTabWidth(i, gm.width); |
|
1619 |
continue; |
|
1620 |
} |
|
1621 |
||
1622 |
unsigned short *logClusters = this->logClusters(si); |
|
1623 |
QGlyphLayout glyphs = shapedGlyphs(si); |
|
1624 |
||
1625 |
// do the simple thing for now and give the first glyph in a cluster the full width, all other ones 0. |
|
1626 |
int charFrom = from - pos; |
|
1627 |
if (charFrom < 0) |
|
1628 |
charFrom = 0; |
|
1629 |
int glyphStart = logClusters[charFrom]; |
|
1630 |
if (charFrom > 0 && logClusters[charFrom-1] == glyphStart) |
|
1631 |
while (charFrom < ilen && logClusters[charFrom] == glyphStart) |
|
1632 |
charFrom++; |
|
1633 |
if (charFrom < ilen) {
|
|
1634 |
glyphStart = logClusters[charFrom]; |
|
1635 |
int charEnd = from + len - 1 - pos; |
|
1636 |
if (charEnd >= ilen) |
|
1637 |
charEnd = ilen-1; |
|
1638 |
int glyphEnd = logClusters[charEnd]; |
|
1639 |
while (charEnd < ilen && logClusters[charEnd] == glyphEnd) |
|
1640 |
charEnd++; |
|
1641 |
glyphEnd = (charEnd == ilen) ? si->num_glyphs : logClusters[charEnd]; |
|
1642 |
if (glyphStart <= glyphEnd ) {
|
|
1643 |
glyph_metrics_t m = fe->boundingBox(glyphs.mid(glyphStart, glyphEnd - glyphStart)); |
|
1644 |
gm.x = qMin(gm.x, m.x + gm.xoff); |
|
1645 |
gm.y = qMin(gm.y, m.y + gm.yoff); |
|
1646 |
gm.width = qMax(gm.width, m.width+gm.xoff); |
|
1647 |
gm.height = qMax(gm.height, m.height+gm.yoff); |
|
1648 |
gm.xoff += m.xoff; |
|
1649 |
gm.yoff += m.yoff; |
|
1650 |
} |
|
1651 |
} |
|
1652 |
||
1653 |
glyph_t glyph = glyphs.glyphs[logClusters[pos + ilen - 1]]; |
|
1654 |
glyph_metrics_t gi = fe->boundingBox(glyph); |
|
1655 |
if (gi.isValid()) |
|
1656 |
gm.width -= qRound(gi.xoff - gi.x - gi.width); |
|
1657 |
} |
|
1658 |
} |
|
1659 |
return gm; |
|
1660 |
} |
|
1661 |
||
1662 |
glyph_metrics_t QTextEngine::tightBoundingBox(int from, int len) const |
|
1663 |
{
|
|
1664 |
itemize(); |
|
1665 |
||
1666 |
glyph_metrics_t gm; |
|
1667 |
||
1668 |
for (int i = 0; i < layoutData->items.size(); i++) {
|
|
1669 |
const QScriptItem *si = layoutData->items.constData() + i; |
|
1670 |
int pos = si->position; |
|
1671 |
int ilen = length(i); |
|
1672 |
if (pos > from + len) |
|
1673 |
break; |
|
1674 |
if (pos + len > from) {
|
|
1675 |
if (!si->num_glyphs) |
|
1676 |
shape(i); |
|
1677 |
unsigned short *logClusters = this->logClusters(si); |
|
1678 |
QGlyphLayout glyphs = shapedGlyphs(si); |
|
1679 |
||
1680 |
// do the simple thing for now and give the first glyph in a cluster the full width, all other ones 0. |
|
1681 |
int charFrom = from - pos; |
|
1682 |
if (charFrom < 0) |
|
1683 |
charFrom = 0; |
|
1684 |
int glyphStart = logClusters[charFrom]; |
|
1685 |
if (charFrom > 0 && logClusters[charFrom-1] == glyphStart) |
|
1686 |
while (charFrom < ilen && logClusters[charFrom] == glyphStart) |
|
1687 |
charFrom++; |
|
1688 |
if (charFrom < ilen) {
|
|
1689 |
glyphStart = logClusters[charFrom]; |
|
1690 |
int charEnd = from + len - 1 - pos; |
|
1691 |
if (charEnd >= ilen) |
|
1692 |
charEnd = ilen-1; |
|
1693 |
int glyphEnd = logClusters[charEnd]; |
|
1694 |
while (charEnd < ilen && logClusters[charEnd] == glyphEnd) |
|
1695 |
charEnd++; |
|
1696 |
glyphEnd = (charEnd == ilen) ? si->num_glyphs : logClusters[charEnd]; |
|
1697 |
if (glyphStart <= glyphEnd ) {
|
|
1698 |
QFontEngine *fe = fontEngine(*si); |
|
1699 |
glyph_metrics_t m = fe->tightBoundingBox(glyphs.mid(glyphStart, glyphEnd - glyphStart)); |
|
1700 |
gm.x = qMin(gm.x, m.x + gm.xoff); |
|
1701 |
gm.y = qMin(gm.y, m.y + gm.yoff); |
|
1702 |
gm.width = qMax(gm.width, m.width+gm.xoff); |
|
1703 |
gm.height = qMax(gm.height, m.height+gm.yoff); |
|
1704 |
gm.xoff += m.xoff; |
|
1705 |
gm.yoff += m.yoff; |
|
1706 |
} |
|
1707 |
} |
|
1708 |
} |
|
1709 |
} |
|
1710 |
return gm; |
|
1711 |
} |
|
1712 |
||
1713 |
QFont QTextEngine::font(const QScriptItem &si) const |
|
1714 |
{
|
|
1715 |
QFont font = fnt; |
|
1716 |
if (hasFormats()) {
|
|
1717 |
QTextCharFormat f = format(&si); |
|
1718 |
font = f.font(); |
|
1719 |
||
1720 |
if (block.docHandle() && block.docHandle()->layout()) {
|
|
1721 |
// Make sure we get the right dpi on printers |
|
1722 |
QPaintDevice *pdev = block.docHandle()->layout()->paintDevice(); |
|
1723 |
if (pdev) |
|
1724 |
font = QFont(font, pdev); |
|
1725 |
} else {
|
|
1726 |
font = font.resolve(fnt); |
|
1727 |
} |
|
1728 |
QTextCharFormat::VerticalAlignment valign = f.verticalAlignment(); |
|
1729 |
if (valign == QTextCharFormat::AlignSuperScript || valign == QTextCharFormat::AlignSubScript) {
|
|
1730 |
if (font.pointSize() != -1) |
|
1731 |
font.setPointSize((font.pointSize() * 2) / 3); |
|
1732 |
else |
|
1733 |
font.setPixelSize((font.pixelSize() * 2) / 3); |
|
1734 |
} |
|
1735 |
} |
|
1736 |
||
1737 |
if (si.analysis.flags == QScriptAnalysis::SmallCaps) |
|
1738 |
font = font.d->smallCapsFont(); |
|
1739 |
||
1740 |
return font; |
|
1741 |
} |
|
1742 |
||
|
3
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1743 |
QFontEngine *QTextEngine::fontEngine(const QScriptItem &si, QFixed *ascent, QFixed *descent, QFixed *leading) const |
| 0 | 1744 |
{
|
1745 |
QFontEngine *engine = 0; |
|
1746 |
QFontEngine *scaledEngine = 0; |
|
1747 |
int script = si.analysis.script; |
|
1748 |
||
1749 |
QFont font = fnt; |
|
1750 |
if (hasFormats()) {
|
|
1751 |
QTextCharFormat f = format(&si); |
|
1752 |
font = f.font(); |
|
1753 |
||
1754 |
if (block.docHandle() && block.docHandle()->layout()) {
|
|
1755 |
// Make sure we get the right dpi on printers |
|
1756 |
QPaintDevice *pdev = block.docHandle()->layout()->paintDevice(); |
|
1757 |
if (pdev) |
|
1758 |
font = QFont(font, pdev); |
|
1759 |
} else {
|
|
1760 |
font = font.resolve(fnt); |
|
1761 |
} |
|
1762 |
engine = font.d->engineForScript(script); |
|
1763 |
QTextCharFormat::VerticalAlignment valign = f.verticalAlignment(); |
|
1764 |
if (valign == QTextCharFormat::AlignSuperScript || valign == QTextCharFormat::AlignSubScript) {
|
|
1765 |
if (font.pointSize() != -1) |
|
1766 |
font.setPointSize((font.pointSize() * 2) / 3); |
|
1767 |
else |
|
1768 |
font.setPixelSize((font.pixelSize() * 2) / 3); |
|
1769 |
scaledEngine = font.d->engineForScript(script); |
|
1770 |
} |
|
1771 |
} else {
|
|
1772 |
engine = font.d->engineForScript(script); |
|
1773 |
} |
|
1774 |
||
1775 |
if (si.analysis.flags == QScriptAnalysis::SmallCaps) {
|
|
1776 |
QFontPrivate *p = font.d->smallCapsFontPrivate(); |
|
1777 |
scaledEngine = p->engineForScript(script); |
|
1778 |
} |
|
1779 |
||
1780 |
if (ascent) {
|
|
1781 |
*ascent = engine->ascent(); |
|
1782 |
*descent = engine->descent(); |
|
|
3
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1783 |
*leading = engine->leading(); |
| 0 | 1784 |
} |
1785 |
||
1786 |
if (scaledEngine) |
|
1787 |
return scaledEngine; |
|
1788 |
return engine; |
|
1789 |
} |
|
1790 |
||
1791 |
struct QJustificationPoint {
|
|
1792 |
int type; |
|
1793 |
QFixed kashidaWidth; |
|
1794 |
QGlyphLayout glyph; |
|
1795 |
QFontEngine *fontEngine; |
|
1796 |
}; |
|
1797 |
||
1798 |
Q_DECLARE_TYPEINFO(QJustificationPoint, Q_PRIMITIVE_TYPE); |
|
1799 |
||
1800 |
static void set(QJustificationPoint *point, int type, const QGlyphLayout &glyph, QFontEngine *fe) |
|
1801 |
{
|
|
1802 |
point->type = type; |
|
1803 |
point->glyph = glyph; |
|
1804 |
point->fontEngine = fe; |
|
1805 |
||
1806 |
if (type >= HB_Arabic_Normal) {
|
|
1807 |
QChar ch(0x640); // Kashida character |
|
1808 |
QGlyphLayoutArray<8> glyphs; |
|
1809 |
int nglyphs = 7; |
|
1810 |
fe->stringToCMap(&ch, 1, &glyphs, &nglyphs, 0); |
|
1811 |
if (glyphs.glyphs[0] && glyphs.advances_x[0] != 0) {
|
|
1812 |
point->kashidaWidth = glyphs.advances_x[0]; |
|
1813 |
} else {
|
|
1814 |
point->type = HB_NoJustification; |
|
1815 |
point->kashidaWidth = 0; |
|
1816 |
} |
|
1817 |
} |
|
1818 |
} |
|
1819 |
||
1820 |
||
1821 |
void QTextEngine::justify(const QScriptLine &line) |
|
1822 |
{
|
|
1823 |
// qDebug("justify: line.gridfitted = %d, line.justified=%d", line.gridfitted, line.justified);
|
|
1824 |
if (line.gridfitted && line.justified) |
|
1825 |
return; |
|
1826 |
||
1827 |
if (!line.gridfitted) {
|
|
1828 |
// redo layout in device metrics, then adjust |
|
1829 |
const_cast<QScriptLine &>(line).gridfitted = true; |
|
1830 |
} |
|
1831 |
||
1832 |
if ((option.alignment() & Qt::AlignHorizontal_Mask) != Qt::AlignJustify) |
|
1833 |
return; |
|
1834 |
||
1835 |
itemize(); |
|
1836 |
||
1837 |
if (!forceJustification) {
|
|
1838 |
int end = line.from + (int)line.length; |
|
1839 |
if (end == layoutData->string.length()) |
|
1840 |
return; // no justification at end of paragraph |
|
1841 |
if (end && layoutData->items[findItem(end-1)].analysis.flags == QScriptAnalysis::LineOrParagraphSeparator) |
|
1842 |
return; // no justification at the end of an explicitely separated line |
|
1843 |
} |
|
1844 |
||
1845 |
// justify line |
|
1846 |
int maxJustify = 0; |
|
1847 |
||
1848 |
// don't include trailing white spaces when doing justification |
|
1849 |
int line_length = line.length; |
|
1850 |
const HB_CharAttributes *a = attributes()+line.from; |
|
1851 |
while (line_length && a[line_length-1].whiteSpace) |
|
1852 |
--line_length; |
|
1853 |
// subtract one char more, as we can't justfy after the last character |
|
1854 |
--line_length; |
|
1855 |
||
1856 |
if (!line_length) |
|
1857 |
return; |
|
1858 |
||
1859 |
int firstItem = findItem(line.from); |
|
1860 |
int nItems = findItem(line.from + line_length - 1) - firstItem + 1; |
|
1861 |
||
1862 |
QVarLengthArray<QJustificationPoint> justificationPoints; |
|
1863 |
int nPoints = 0; |
|
1864 |
// qDebug("justifying from %d len %d, firstItem=%d, nItems=%d (%s)", line.from, line_length, firstItem, nItems, layoutData->string.mid(line.from, line_length).toUtf8().constData());
|
|
1865 |
QFixed minKashida = 0x100000; |
|
1866 |
||
1867 |
// we need to do all shaping before we go into the next loop, as we there |
|
1868 |
// store pointers to the glyph data that could get reallocated by the shaping |
|
1869 |
// process. |
|
1870 |
for (int i = 0; i < nItems; ++i) {
|
|
1871 |
QScriptItem &si = layoutData->items[firstItem + i]; |
|
1872 |
if (!si.num_glyphs) |
|
1873 |
shape(firstItem + i); |
|
1874 |
} |
|
1875 |
||
1876 |
for (int i = 0; i < nItems; ++i) {
|
|
1877 |
QScriptItem &si = layoutData->items[firstItem + i]; |
|
1878 |
||
1879 |
int kashida_type = HB_Arabic_Normal; |
|
1880 |
int kashida_pos = -1; |
|
1881 |
||
1882 |
int start = qMax(line.from - si.position, 0); |
|
1883 |
int end = qMin(line.from + line_length - (int)si.position, length(firstItem+i)); |
|
1884 |
||
1885 |
unsigned short *log_clusters = logClusters(&si); |
|
1886 |
||
1887 |
int gs = log_clusters[start]; |
|
1888 |
int ge = (end == length(firstItem+i) ? si.num_glyphs : log_clusters[end]); |
|
1889 |
||
1890 |
const QGlyphLayout g = shapedGlyphs(&si); |
|
1891 |
||
1892 |
for (int i = gs; i < ge; ++i) {
|
|
1893 |
g.justifications[i].type = QGlyphJustification::JustifyNone; |
|
1894 |
g.justifications[i].nKashidas = 0; |
|
1895 |
g.justifications[i].space_18d6 = 0; |
|
1896 |
||
1897 |
justificationPoints.resize(nPoints+3); |
|
1898 |
int justification = g.attributes[i].justification; |
|
1899 |
||
1900 |
switch(justification) {
|
|
1901 |
case HB_NoJustification: |
|
1902 |
break; |
|
1903 |
case HB_Space : |
|
1904 |
// fall through |
|
1905 |
case HB_Arabic_Space : |
|
1906 |
if (kashida_pos >= 0) {
|
|
1907 |
// qDebug("kashida position at %d in word", kashida_pos);
|
|
1908 |
set(&justificationPoints[nPoints], kashida_type, g.mid(kashida_pos), fontEngine(si)); |
|
1909 |
minKashida = qMin(minKashida, justificationPoints[nPoints].kashidaWidth); |
|
1910 |
maxJustify = qMax(maxJustify, justificationPoints[nPoints].type); |
|
1911 |
++nPoints; |
|
1912 |
} |
|
1913 |
kashida_pos = -1; |
|
1914 |
kashida_type = HB_Arabic_Normal; |
|
1915 |
// fall through |
|
1916 |
case HB_Character : |
|
1917 |
set(&justificationPoints[nPoints++], justification, g.mid(i), fontEngine(si)); |
|
1918 |
maxJustify = qMax(maxJustify, justification); |
|
1919 |
break; |
|
1920 |
case HB_Arabic_Normal : |
|
1921 |
case HB_Arabic_Waw : |
|
1922 |
case HB_Arabic_BaRa : |
|
1923 |
case HB_Arabic_Alef : |
|
1924 |
case HB_Arabic_HaaDal : |
|
1925 |
case HB_Arabic_Seen : |
|
1926 |
case HB_Arabic_Kashida : |
|
1927 |
if (justification >= kashida_type) {
|
|
1928 |
kashida_pos = i; |
|
1929 |
kashida_type = justification; |
|
1930 |
} |
|
1931 |
} |
|
1932 |
} |
|
1933 |
if (kashida_pos >= 0) {
|
|
1934 |
set(&justificationPoints[nPoints], kashida_type, g.mid(kashida_pos), fontEngine(si)); |
|
1935 |
minKashida = qMin(minKashida, justificationPoints[nPoints].kashidaWidth); |
|
1936 |
maxJustify = qMax(maxJustify, justificationPoints[nPoints].type); |
|
1937 |
++nPoints; |
|
1938 |
} |
|
1939 |
} |
|
1940 |
||
1941 |
QFixed need = line.width - line.textWidth; |
|
1942 |
if (need < 0) {
|
|
1943 |
// line overflows already! |
|
1944 |
const_cast<QScriptLine &>(line).justified = true; |
|
1945 |
return; |
|
1946 |
} |
|
1947 |
||
1948 |
// qDebug("doing justification: textWidth=%x, requested=%x, maxJustify=%d", line.textWidth.value(), line.width.value(), maxJustify);
|
|
1949 |
// qDebug(" minKashida=%f, need=%f", minKashida.toReal(), need.toReal());
|
|
1950 |
||
1951 |
// distribute in priority order |
|
1952 |
if (maxJustify >= HB_Arabic_Normal) {
|
|
1953 |
while (need >= minKashida) {
|
|
1954 |
for (int type = maxJustify; need >= minKashida && type >= HB_Arabic_Normal; --type) {
|
|
1955 |
for (int i = 0; need >= minKashida && i < nPoints; ++i) {
|
|
1956 |
if (justificationPoints[i].type == type && justificationPoints[i].kashidaWidth <= need) {
|
|
1957 |
justificationPoints[i].glyph.justifications->nKashidas++; |
|
1958 |
// ############ |
|
1959 |
justificationPoints[i].glyph.justifications->space_18d6 += justificationPoints[i].kashidaWidth.value(); |
|
1960 |
need -= justificationPoints[i].kashidaWidth; |
|
1961 |
// qDebug("adding kashida type %d with width %x, neednow %x", type, justificationPoints[i].kashidaWidth, need.value());
|
|
1962 |
} |
|
1963 |
} |
|
1964 |
} |
|
1965 |
} |
|
1966 |
} |
|
1967 |
Q_ASSERT(need >= 0); |
|
1968 |
if (!need) |
|
1969 |
goto end; |
|
1970 |
||
1971 |
maxJustify = qMin(maxJustify, (int)HB_Space); |
|
1972 |
for (int type = maxJustify; need != 0 && type > 0; --type) {
|
|
1973 |
int n = 0; |
|
1974 |
for (int i = 0; i < nPoints; ++i) {
|
|
1975 |
if (justificationPoints[i].type == type) |
|
1976 |
++n; |
|
1977 |
} |
|
1978 |
// qDebug("number of points for justification type %d: %d", type, n);
|
|
1979 |
||
1980 |
||
1981 |
if (!n) |
|
1982 |
continue; |
|
1983 |
||
1984 |
for (int i = 0; i < nPoints; ++i) {
|
|
1985 |
if (justificationPoints[i].type == type) {
|
|
1986 |
QFixed add = need/n; |
|
1987 |
// qDebug("adding %x to glyph %x", add.value(), justificationPoints[i].glyph->glyph);
|
|
1988 |
justificationPoints[i].glyph.justifications[0].space_18d6 = add.value(); |
|
1989 |
need -= add; |
|
1990 |
--n; |
|
1991 |
} |
|
1992 |
} |
|
1993 |
||
1994 |
Q_ASSERT(!need); |
|
1995 |
} |
|
1996 |
end: |
|
1997 |
const_cast<QScriptLine &>(line).justified = true; |
|
1998 |
} |
|
1999 |
||
2000 |
void QScriptLine::setDefaultHeight(QTextEngine *eng) |
|
2001 |
{
|
|
2002 |
QFont f; |
|
2003 |
QFontEngine *e; |
|
2004 |
||
2005 |
if (eng->block.docHandle() && eng->block.docHandle()->layout()) {
|
|
2006 |
f = eng->block.charFormat().font(); |
|
2007 |
// Make sure we get the right dpi on printers |
|
2008 |
QPaintDevice *pdev = eng->block.docHandle()->layout()->paintDevice(); |
|
2009 |
if (pdev) |
|
2010 |
f = QFont(f, pdev); |
|
2011 |
e = f.d->engineForScript(QUnicodeTables::Common); |
|
2012 |
} else {
|
|
2013 |
e = eng->fnt.d->engineForScript(QUnicodeTables::Common); |
|
2014 |
} |
|
2015 |
||
|
3
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
2016 |
QFixed other_ascent = e->ascent(); |
|
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
2017 |
QFixed other_descent = e->descent(); |
|
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
2018 |
QFixed other_leading = e->leading(); |
|
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
2019 |
leading = qMax(leading + ascent, other_leading + other_ascent) - qMax(ascent, other_ascent); |
|
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
2020 |
ascent = qMax(ascent, other_ascent); |
|
41300fa6a67c
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
2021 |
descent = qMax(descent, other_descent); |
| 0 | 2022 |
} |
2023 |
||
2024 |
QTextEngine::LayoutData::LayoutData() |
|
2025 |
{
|
|
2026 |
memory = 0; |
|
2027 |
allocated = 0; |
|
2028 |
memory_on_stack = false; |
|
2029 |
used = 0; |
|
2030 |
hasBidi = false; |
|
2031 |
inLayout = false; |
|
2032 |
haveCharAttributes = false; |
|
2033 |
logClustersPtr = 0; |
|
2034 |
available_glyphs = 0; |
|
2035 |
} |
|
2036 |
||
2037 |
QTextEngine::LayoutData::LayoutData(const QString &str, void **stack_memory, int _allocated) |
|
2038 |
: string(str) |
|
2039 |
{
|
|
2040 |
allocated = _allocated; |
|
2041 |
||
2042 |
int space_charAttributes = sizeof(HB_CharAttributes)*string.length()/sizeof(void*) + 1; |
|
2043 |
int space_logClusters = sizeof(unsigned short)*string.length()/sizeof(void*) + 1; |
|
2044 |
available_glyphs = ((int)allocated - space_charAttributes - space_logClusters)*(int)sizeof(void*)/(int)QGlyphLayout::spaceNeededForGlyphLayout(1); |
|
2045 |
||
2046 |
if (available_glyphs < str.length()) {
|
|
2047 |
// need to allocate on the heap |
|
2048 |
allocated = 0; |
|
2049 |
||
2050 |
memory_on_stack = false; |
|
2051 |
memory = 0; |
|
2052 |
logClustersPtr = 0; |
|
2053 |
} else {
|
|
2054 |
memory_on_stack = true; |
|
2055 |
memory = stack_memory; |
|
2056 |
logClustersPtr = (unsigned short *)(memory + space_charAttributes); |
|
2057 |
||
2058 |
void *m = memory + space_charAttributes + space_logClusters; |
|
2059 |
glyphLayout = QGlyphLayout(reinterpret_cast<char *>(m), str.length()); |
|
2060 |
glyphLayout.clear(); |
|
2061 |
memset(memory, 0, space_charAttributes*sizeof(void *)); |
|
2062 |
} |
|
2063 |
used = 0; |
|
2064 |
hasBidi = false; |
|
2065 |
inLayout = false; |
|
2066 |
haveCharAttributes = false; |
|
2067 |
} |
|
2068 |
||
2069 |
QTextEngine::LayoutData::~LayoutData() |
|
2070 |
{
|
|
2071 |
if (!memory_on_stack) |
|
2072 |
free(memory); |
|
2073 |
memory = 0; |
|
2074 |
} |
|
2075 |
||
2076 |
void QTextEngine::LayoutData::reallocate(int totalGlyphs) |
|
2077 |
{
|
|
2078 |
Q_ASSERT(totalGlyphs >= glyphLayout.numGlyphs); |
|
2079 |
if (memory_on_stack && available_glyphs >= totalGlyphs) {
|
|
2080 |
glyphLayout.grow(glyphLayout.data(), totalGlyphs); |
|
2081 |
return; |
|
2082 |
} |
|
2083 |
||
2084 |
int space_charAttributes = sizeof(HB_CharAttributes)*string.length()/sizeof(void*) + 1; |
|
2085 |
int space_logClusters = sizeof(unsigned short)*string.length()/sizeof(void*) + 1; |
|
2086 |
int space_glyphs = QGlyphLayout::spaceNeededForGlyphLayout(totalGlyphs)/sizeof(void*) + 2; |
|
2087 |
||
2088 |
int newAllocated = space_charAttributes + space_glyphs + space_logClusters; |
|
2089 |
Q_ASSERT(newAllocated >= allocated); |
|
2090 |
void **newMem = memory; |
|
2091 |
newMem = (void **)::realloc(memory_on_stack ? 0 : memory, newAllocated*sizeof(void *)); |
|
2092 |
Q_CHECK_PTR(newMem); |
|
2093 |
if (memory_on_stack && newMem) |
|
2094 |
memcpy(newMem, memory, allocated*sizeof(void *)); |
|
2095 |
memory = newMem; |
|
2096 |
memory_on_stack = false; |
|
2097 |
||
2098 |
void **m = memory; |
|
2099 |
m += space_charAttributes; |
|
2100 |
logClustersPtr = (unsigned short *) m; |
|
2101 |
m += space_logClusters; |
|
2102 |
||
2103 |
const int space_preGlyphLayout = space_charAttributes + space_logClusters; |
|
2104 |
if (allocated < space_preGlyphLayout) |
|
2105 |
memset(memory + allocated, 0, (space_preGlyphLayout - allocated)*sizeof(void *)); |
|
2106 |
||
2107 |
glyphLayout.grow(reinterpret_cast<char *>(m), totalGlyphs); |
|
2108 |
||
2109 |
allocated = newAllocated; |
|
2110 |
} |
|
2111 |
||
2112 |
// grow to the new size, copying the existing data to the new layout |
|
2113 |
void QGlyphLayout::grow(char *address, int totalGlyphs) |
|
2114 |
{
|
|
2115 |
QGlyphLayout oldLayout(address, numGlyphs); |
|
2116 |
QGlyphLayout newLayout(address, totalGlyphs); |
|
2117 |
||
2118 |
if (numGlyphs) {
|
|
2119 |
// move the existing data |
|
2120 |
memmove(newLayout.attributes, oldLayout.attributes, numGlyphs * sizeof(HB_GlyphAttributes)); |
|
2121 |
memmove(newLayout.justifications, oldLayout.justifications, numGlyphs * sizeof(QGlyphJustification)); |
|
2122 |
memmove(newLayout.advances_y, oldLayout.advances_y, numGlyphs * sizeof(QFixed)); |
|
2123 |
memmove(newLayout.advances_x, oldLayout.advances_x, numGlyphs * sizeof(QFixed)); |
|
2124 |
memmove(newLayout.glyphs, oldLayout.glyphs, numGlyphs * sizeof(HB_Glyph)); |
|
2125 |
} |
|
2126 |
||
2127 |
// clear the new data |
|
2128 |
newLayout.clear(numGlyphs); |
|
2129 |
||
2130 |
*this = newLayout; |
|
2131 |
} |
|
2132 |
||
2133 |
void QTextEngine::freeMemory() |
|
2134 |
{
|
|
2135 |
if (!stackEngine) {
|
|
2136 |
delete layoutData; |
|
2137 |
layoutData = 0; |
|
2138 |
} else {
|
|
2139 |
layoutData->used = 0; |
|
2140 |
layoutData->hasBidi = false; |
|
2141 |
layoutData->inLayout = false; |
|
2142 |
layoutData->haveCharAttributes = false; |
|
2143 |
} |
|
2144 |
for (int i = 0; i < lines.size(); ++i) {
|
|
2145 |
lines[i].justified = 0; |
|
2146 |
lines[i].gridfitted = 0; |
|
2147 |
} |
|
2148 |
} |
|
2149 |
||
2150 |
int QTextEngine::formatIndex(const QScriptItem *si) const |
|
2151 |
{
|
|
2152 |
if (specialData && !specialData->resolvedFormatIndices.isEmpty()) |
|
2153 |
return specialData->resolvedFormatIndices.at(si - &layoutData->items[0]); |
|
2154 |
QTextDocumentPrivate *p = block.docHandle(); |
|
2155 |
if (!p) |
|
2156 |
return -1; |
|
2157 |
int pos = si->position; |
|
2158 |
if (specialData && si->position >= specialData->preeditPosition) {
|
|
2159 |
if (si->position < specialData->preeditPosition + specialData->preeditText.length()) |
|
2160 |
pos = qMax(specialData->preeditPosition - 1, 0); |
|
2161 |
else |
|
2162 |
pos -= specialData->preeditText.length(); |
|
2163 |
} |
|
2164 |
QTextDocumentPrivate::FragmentIterator it = p->find(block.position() + pos); |
|
2165 |
return it.value()->format; |
|
2166 |
} |
|
2167 |
||
2168 |
||
2169 |
QTextCharFormat QTextEngine::format(const QScriptItem *si) const |
|
2170 |
{
|
|
2171 |
QTextCharFormat format; |
|
2172 |
const QTextFormatCollection *formats = 0; |
|
2173 |
if (block.docHandle()) {
|
|
2174 |
formats = this->formats(); |
|
2175 |
format = formats->charFormat(formatIndex(si)); |
|
2176 |
} |
|
2177 |
if (specialData && specialData->resolvedFormatIndices.isEmpty()) {
|
|
2178 |
int end = si->position + length(si); |
|
2179 |
for (int i = 0; i < specialData->addFormats.size(); ++i) {
|
|
2180 |
const QTextLayout::FormatRange &r = specialData->addFormats.at(i); |
|
2181 |
if (r.start <= si->position && r.start + r.length >= end) {
|
|
2182 |
if (!specialData->addFormatIndices.isEmpty()) |
|
2183 |
format.merge(formats->format(specialData->addFormatIndices.at(i))); |
|
2184 |
else |
|
2185 |
format.merge(r.format); |
|
2186 |
} |
|
2187 |
} |
|
2188 |
} |
|
2189 |
return format; |
|
2190 |
} |
|
2191 |
||
2192 |
void QTextEngine::addRequiredBoundaries() const |
|
2193 |
{
|
|
2194 |
if (specialData) {
|
|
2195 |
for (int i = 0; i < specialData->addFormats.size(); ++i) {
|
|
2196 |
const QTextLayout::FormatRange &r = specialData->addFormats.at(i); |
|
2197 |
setBoundary(r.start); |
|
2198 |
setBoundary(r.start + r.length); |
|
2199 |
//qDebug("adding boundaries %d %d", r.start, r.start+r.length);
|
|
2200 |
} |
|
2201 |
} |
|
2202 |
} |
|
2203 |
||
2204 |
bool QTextEngine::atWordSeparator(int position) const |
|
2205 |
{
|
|
2206 |
const QChar c = layoutData->string.at(position); |
|
2207 |
switch (c.toLatin1()) {
|
|
2208 |
case '.': |
|
2209 |
case ',': |
|
2210 |
case '?': |
|
2211 |
case '!': |
|
2212 |
case ':': |
|
2213 |
case ';': |
|
2214 |
case '-': |
|
2215 |
case '<': |
|
2216 |
case '>': |
|
2217 |
case '[': |
|
2218 |
case ']': |
|
2219 |
case '(':
|
|
2220 |
case ')': |
|
2221 |
case '{':
|
|
2222 |
case '}': |
|
2223 |
case '=': |
|
2224 |
case '/': |
|
2225 |
case '+': |
|
2226 |
case '%': |
|
2227 |
case '&': |
|
2228 |
case '^': |
|
2229 |
case '*': |
|
2230 |
case '\'': |
|
2231 |
case '"': |
|
2232 |
case '~': |
|
2233 |
case '|': |
|
2234 |
return true; |
|
2235 |
default: |
|
2236 |
return false; |
|
2237 |
} |
|
2238 |
} |
|
2239 |
||
2240 |
bool QTextEngine::atSpace(int position) const |
|
2241 |
{
|
|
2242 |
const QChar c = layoutData->string.at(position); |
|
2243 |
||
2244 |
return c == QLatin1Char(' ')
|
|
2245 |
|| c == QChar::Nbsp |
|
2246 |
|| c == QChar::LineSeparator |
|
2247 |
|| c == QLatin1Char('\t')
|
|
2248 |
; |
|
2249 |
} |
|
2250 |
||
2251 |
||
2252 |
void QTextEngine::indexAdditionalFormats() |
|
2253 |
{
|
|
2254 |
if (!block.docHandle()) |
|
2255 |
return; |
|
2256 |
||
2257 |
specialData->addFormatIndices.resize(specialData->addFormats.count()); |
|
2258 |
QTextFormatCollection * const formats = this->formats(); |
|
2259 |
||
2260 |
for (int i = 0; i < specialData->addFormats.count(); ++i) {
|
|
2261 |
specialData->addFormatIndices[i] = formats->indexForFormat(specialData->addFormats.at(i).format); |
|
2262 |
specialData->addFormats[i].format = QTextCharFormat(); |
|
2263 |
} |
|
2264 |
} |
|
2265 |
||
2266 |
/* These two helper functions are used to determine whether we need to insert a ZWJ character |
|
2267 |
between the text that gets truncated and the ellipsis. This is important to get |
|
2268 |
correctly shaped results for arabic text. |
|
2269 |
*/ |
|
2270 |
static bool nextCharJoins(const QString &string, int pos) |
|
2271 |
{
|
|
2272 |
while (pos < string.length() && string.at(pos).category() == QChar::Mark_NonSpacing) |
|
2273 |
++pos; |
|
2274 |
if (pos == string.length()) |
|
2275 |
return false; |
|
2276 |
return string.at(pos).joining() != QChar::OtherJoining; |
|
2277 |
} |
|
2278 |
||
2279 |
static bool prevCharJoins(const QString &string, int pos) |
|
2280 |
{
|
|
2281 |
while (pos > 0 && string.at(pos - 1).category() == QChar::Mark_NonSpacing) |
|
2282 |
--pos; |
|
2283 |
if (pos == 0) |
|
2284 |
return false; |
|
2285 |
return (string.at(pos - 1).joining() == QChar::Dual || string.at(pos - 1).joining() == QChar::Center); |
|
2286 |
} |
|
2287 |
||
2288 |
QString QTextEngine::elidedText(Qt::TextElideMode mode, const QFixed &width, int flags) const |
|
2289 |
{
|
|
2290 |
// qDebug() << "elidedText; available width" << width.toReal() << "text width:" << this->width(0, layoutData->string.length()).toReal(); |
|
2291 |
||
2292 |
if (flags & Qt::TextShowMnemonic) {
|
|
2293 |
itemize(); |
|
2294 |
for (int i = 0; i < layoutData->items.size(); ++i) {
|
|
2295 |
QScriptItem &si = layoutData->items[i]; |
|
2296 |
if (!si.num_glyphs) |
|
2297 |
shape(i); |
|
2298 |
||
2299 |
HB_CharAttributes *attributes = const_cast<HB_CharAttributes *>(this->attributes()); |
|
2300 |
unsigned short *logClusters = this->logClusters(&si); |
|
2301 |
QGlyphLayout glyphs = shapedGlyphs(&si); |
|
2302 |
||
2303 |
const int end = si.position + length(&si); |
|
2304 |
for (int i = si.position; i < end - 1; ++i) |
|
2305 |
if (layoutData->string.at(i) == QLatin1Char('&')) {
|
|
2306 |
const int gp = logClusters[i - si.position]; |
|
2307 |
glyphs.attributes[gp].dontPrint = true; |
|
2308 |
attributes[i + 1].charStop = false; |
|
2309 |
attributes[i + 1].whiteSpace = false; |
|
2310 |
attributes[i + 1].lineBreakType = HB_NoBreak; |
|
2311 |
if (i < end - 1 |
|
2312 |
&& layoutData->string.at(i + 1) == QLatin1Char('&'))
|
|
2313 |
++i; |
|
2314 |
} |
|
2315 |
} |
|
2316 |
} |
|
2317 |
||
2318 |
validate(); |
|
2319 |
||
2320 |
if (mode == Qt::ElideNone |
|
2321 |
|| this->width(0, layoutData->string.length()) <= width |
|
2322 |
|| layoutData->string.length() <= 1) |
|
2323 |
return layoutData->string; |
|
2324 |
||
2325 |
QFixed ellipsisWidth; |
|
2326 |
QString ellipsisText; |
|
2327 |
{
|
|
2328 |
QChar ellipsisChar(0x2026); |
|
2329 |
||
2330 |
QFontEngine *fe = fnt.d->engineForScript(QUnicodeTables::Common); |
|
2331 |
||
2332 |
QGlyphLayoutArray<1> ellipsisGlyph; |
|
2333 |
{
|
|
2334 |
QFontEngine *feForEllipsis = (fe->type() == QFontEngine::Multi) |
|
2335 |
? static_cast<QFontEngineMulti *>(fe)->engine(0) |
|
2336 |
: fe; |
|
2337 |
||
2338 |
if (feForEllipsis->type() == QFontEngine::Mac) |
|
2339 |
feForEllipsis = fe; |
|
2340 |
||
2341 |
// the lookup can be really slow when we use XLFD fonts |
|
2342 |
if (feForEllipsis->type() != QFontEngine::XLFD |
|
2343 |
&& feForEllipsis->canRender(&ellipsisChar, 1)) {
|
|
2344 |
int nGlyphs = 1; |
|
2345 |
feForEllipsis->stringToCMap(&ellipsisChar, 1, &ellipsisGlyph, &nGlyphs, 0); |
|
2346 |
} |
|
2347 |
} |
|
2348 |
||
2349 |
if (ellipsisGlyph.glyphs[0]) {
|
|
2350 |
ellipsisWidth = ellipsisGlyph.advances_x[0]; |
|
2351 |
ellipsisText = ellipsisChar; |
|
2352 |
} else {
|
|
2353 |
QString dotDotDot(QLatin1String("..."));
|
|
2354 |
||
2355 |
QGlyphLayoutArray<3> glyphs; |
|
2356 |
int nGlyphs = 3; |
|
2357 |
if (!fe->stringToCMap(dotDotDot.constData(), 3, &glyphs, &nGlyphs, 0)) |
|
2358 |
// should never happen... |
|
2359 |
return layoutData->string; |
|
2360 |
for (int i = 0; i < nGlyphs; ++i) |
|
2361 |
ellipsisWidth += glyphs.advances_x[i]; |
|
2362 |
ellipsisText = dotDotDot; |
|
2363 |
} |
|
2364 |
} |
|
2365 |
||
2366 |
const QFixed availableWidth = width - ellipsisWidth; |
|
2367 |
if (availableWidth < 0) |
|
2368 |
return QString(); |
|
2369 |
||
2370 |
const HB_CharAttributes *attributes = this->attributes(); |
|
2371 |
||
2372 |
if (mode == Qt::ElideRight) {
|
|
2373 |
QFixed currentWidth; |
|
2374 |
int pos = 0; |
|
2375 |
int nextBreak = 0; |
|
2376 |
||
2377 |
do {
|
|
2378 |
pos = nextBreak; |
|
2379 |
||
2380 |
++nextBreak; |
|
2381 |
while (nextBreak < layoutData->string.length() && !attributes[nextBreak].charStop) |
|
2382 |
++nextBreak; |
|
2383 |
||
2384 |
currentWidth += this->width(pos, nextBreak - pos); |
|
2385 |
} while (nextBreak < layoutData->string.length() |
|
2386 |
&& currentWidth < availableWidth); |
|
2387 |
||
2388 |
if (nextCharJoins(layoutData->string, pos)) |
|
2389 |
ellipsisText.prepend(QChar(0x200d) /* ZWJ */); |
|
2390 |
||
2391 |
return layoutData->string.left(pos) + ellipsisText; |
|
2392 |
} else if (mode == Qt::ElideLeft) {
|
|
2393 |
QFixed currentWidth; |
|
2394 |
int pos = layoutData->string.length(); |
|
2395 |
int nextBreak = layoutData->string.length(); |
|
2396 |
||
2397 |
do {
|
|
2398 |
pos = nextBreak; |
|
2399 |
||
2400 |
--nextBreak; |
|
2401 |
while (nextBreak > 0 && !attributes[nextBreak].charStop) |
|
2402 |
--nextBreak; |
|
2403 |
||
2404 |
currentWidth += this->width(nextBreak, pos - nextBreak); |
|
2405 |
} while (nextBreak > 0 |
|
2406 |
&& currentWidth < availableWidth); |
|
2407 |
||
2408 |
if (prevCharJoins(layoutData->string, pos)) |
|
2409 |
ellipsisText.append(QChar(0x200d) /* ZWJ */); |
|
2410 |
||
2411 |
return ellipsisText + layoutData->string.mid(pos); |
|
2412 |
} else if (mode == Qt::ElideMiddle) {
|
|
2413 |
QFixed leftWidth; |
|
2414 |
QFixed rightWidth; |
|
2415 |
||
2416 |
int leftPos = 0; |
|
2417 |
int nextLeftBreak = 0; |
|
2418 |
||
2419 |
int rightPos = layoutData->string.length(); |
|
2420 |
int nextRightBreak = layoutData->string.length(); |
|
2421 |
||
2422 |
do {
|
|
2423 |
leftPos = nextLeftBreak; |
|
2424 |
rightPos = nextRightBreak; |
|
2425 |
||
2426 |
++nextLeftBreak; |
|
2427 |
while (nextLeftBreak < layoutData->string.length() && !attributes[nextLeftBreak].charStop) |
|
2428 |
++nextLeftBreak; |
|
2429 |
||
2430 |
--nextRightBreak; |
|
2431 |
while (nextRightBreak > 0 && !attributes[nextRightBreak].charStop) |
|
2432 |
--nextRightBreak; |
|
2433 |
||
2434 |
leftWidth += this->width(leftPos, nextLeftBreak - leftPos); |
|
2435 |
rightWidth += this->width(nextRightBreak, rightPos - nextRightBreak); |
|
2436 |
} while (nextLeftBreak < layoutData->string.length() |
|
2437 |
&& nextRightBreak > 0 |
|
2438 |
&& leftWidth + rightWidth < availableWidth); |
|
2439 |
||
2440 |
if (nextCharJoins(layoutData->string, leftPos)) |
|
2441 |
ellipsisText.prepend(QChar(0x200d) /* ZWJ */); |
|
2442 |
if (prevCharJoins(layoutData->string, rightPos)) |
|
2443 |
ellipsisText.append(QChar(0x200d) /* ZWJ */); |
|
2444 |
||
2445 |
return layoutData->string.left(leftPos) + ellipsisText + layoutData->string.mid(rightPos); |
|
2446 |
} |
|
2447 |
||
2448 |
return layoutData->string; |
|
2449 |
} |
|
2450 |
||
2451 |
void QTextEngine::setBoundary(int strPos) const |
|
2452 |
{
|
|
2453 |
if (strPos <= 0 || strPos >= layoutData->string.length()) |
|
2454 |
return; |
|
2455 |
||
2456 |
int itemToSplit = 0; |
|
2457 |
while (itemToSplit < layoutData->items.size() && layoutData->items[itemToSplit].position <= strPos) |
|
2458 |
itemToSplit++; |
|
2459 |
itemToSplit--; |
|
2460 |
if (layoutData->items[itemToSplit].position == strPos) {
|
|
2461 |
// already a split at the requested position |
|
2462 |
return; |
|
2463 |
} |
|
2464 |
splitItem(itemToSplit, strPos - layoutData->items[itemToSplit].position); |
|
2465 |
} |
|
2466 |
||
2467 |
void QTextEngine::splitItem(int item, int pos) const |
|
2468 |
{
|
|
2469 |
if (pos <= 0) |
|
2470 |
return; |
|
2471 |
||
2472 |
layoutData->items.insert(item + 1, QScriptItem(layoutData->items[item])); |
|
2473 |
QScriptItem &oldItem = layoutData->items[item]; |
|
2474 |
QScriptItem &newItem = layoutData->items[item+1]; |
|
2475 |
newItem.position += pos; |
|
2476 |
||
2477 |
if (oldItem.num_glyphs) {
|
|
2478 |
// already shaped, break glyphs aswell |
|
2479 |
int breakGlyph = logClusters(&oldItem)[pos]; |
|
2480 |
||
2481 |
newItem.num_glyphs = oldItem.num_glyphs - breakGlyph; |
|
2482 |
oldItem.num_glyphs = breakGlyph; |
|
2483 |
newItem.glyph_data_offset = oldItem.glyph_data_offset + breakGlyph; |
|
2484 |
||
2485 |
for (int i = 0; i < newItem.num_glyphs; i++) |
|
2486 |
logClusters(&newItem)[i] -= breakGlyph; |
|
2487 |
||
2488 |
QFixed w = 0; |
|
2489 |
const QGlyphLayout g = shapedGlyphs(&oldItem); |
|
2490 |
for(int j = 0; j < breakGlyph; ++j) |
|
2491 |
w += g.advances_x[j]; |
|
2492 |
||
2493 |
newItem.width = oldItem.width - w; |
|
2494 |
oldItem.width = w; |
|
2495 |
} |
|
2496 |
||
2497 |
// qDebug("split at position %d itempos=%d", pos, item);
|
|
2498 |
} |
|
2499 |
||
2500 |
extern int qt_defaultDpiY(); |
|
2501 |
||
2502 |
QFixed QTextEngine::calculateTabWidth(int item, QFixed x) const |
|
2503 |
{
|
|
2504 |
const QScriptItem &si = layoutData->items[item]; |
|
2505 |
||
2506 |
QFixed dpiScale = 1; |
|
2507 |
if (block.docHandle() && block.docHandle()->layout()) {
|
|
2508 |
QPaintDevice *pdev = block.docHandle()->layout()->paintDevice(); |
|
2509 |
if (pdev) |
|
2510 |
dpiScale = QFixed::fromReal(pdev->logicalDpiY() / qreal(qt_defaultDpiY())); |
|
2511 |
} else {
|
|
2512 |
dpiScale = QFixed::fromReal(fnt.d->dpi / qreal(qt_defaultDpiY())); |
|
2513 |
} |
|
2514 |
||
2515 |
QList<QTextOption::Tab> tabArray = option.tabs(); |
|
2516 |
if (!tabArray.isEmpty()) {
|
|
2517 |
if (option.textDirection() == Qt::RightToLeft) { // rebase the tabArray positions.
|
|
2518 |
QList<QTextOption::Tab> newTabs; |
|
2519 |
QList<QTextOption::Tab>::Iterator iter = tabArray.begin(); |
|
2520 |
while(iter != tabArray.end()) {
|
|
2521 |
QTextOption::Tab tab = *iter; |
|
2522 |
if (tab.type == QTextOption::LeftTab) |
|
2523 |
tab.type = QTextOption::RightTab; |
|
2524 |
else if (tab.type == QTextOption::RightTab) |
|
2525 |
tab.type = QTextOption::LeftTab; |
|
2526 |
newTabs << tab; |
|
2527 |
++iter; |
|
2528 |
} |
|
2529 |
tabArray = newTabs; |
|
2530 |
} |
|
2531 |
for (int i = 0; i < tabArray.size(); ++i) {
|
|
2532 |
QFixed tab = QFixed::fromReal(tabArray[i].position) * dpiScale; |
|
2533 |
if (tab > x) { // this is the tab we need.
|
|
2534 |
QTextOption::Tab tabSpec = tabArray[i]; |
|
2535 |
int tabSectionEnd = layoutData->string.count(); |
|
2536 |
if (tabSpec.type == QTextOption::RightTab || tabSpec.type == QTextOption::CenterTab) {
|
|
2537 |
// find next tab to calculate the width required. |
|
2538 |
tab = QFixed::fromReal(tabSpec.position); |
|
2539 |
for (int i=item + 1; i < layoutData->items.count(); i++) {
|
|
2540 |
const QScriptItem &item = layoutData->items[i]; |
|
2541 |
if (item.analysis.flags == QScriptAnalysis::TabOrObject) { // found it.
|
|
2542 |
tabSectionEnd = item.position; |
|
2543 |
break; |
|
2544 |
} |
|
2545 |
} |
|
2546 |
} |
|
2547 |
else if (tabSpec.type == QTextOption::DelimiterTab) |
|
2548 |
// find delimitor character to calculate the width required |
|
2549 |
tabSectionEnd = qMax(si.position, layoutData->string.indexOf(tabSpec.delimiter, si.position) + 1); |
|
2550 |
||
2551 |
if (tabSectionEnd > si.position) {
|
|
2552 |
QFixed length; |
|
2553 |
// Calculate the length of text between this tab and the tabSectionEnd |
|
2554 |
for (int i=item; i < layoutData->items.count(); i++) {
|
|
2555 |
QScriptItem &item = layoutData->items[i]; |
|
2556 |
if (item.position > tabSectionEnd || item.position <= si.position) |
|
2557 |
continue; |
|
2558 |
shape(i); // first, lets make sure relevant text is already shaped |
|
2559 |
QGlyphLayout glyphs = this->shapedGlyphs(&item); |
|
2560 |
const int end = qMin(item.position + item.num_glyphs, tabSectionEnd) - item.position; |
|
2561 |
for (int i=0; i < end; i++) |
|
2562 |
length += glyphs.advances_x[i] * !glyphs.attributes[i].dontPrint; |
|
2563 |
if (end + item.position == tabSectionEnd && tabSpec.type == QTextOption::DelimiterTab) // remove half of matching char |
|
2564 |
length -= glyphs.advances_x[end] / 2 * !glyphs.attributes[end].dontPrint; |
|
2565 |
} |
|
2566 |
||
2567 |
switch (tabSpec.type) {
|
|
2568 |
case QTextOption::CenterTab: |
|
2569 |
length /= 2; |
|
2570 |
// fall through |
|
2571 |
case QTextOption::DelimiterTab: |
|
2572 |
// fall through |
|
2573 |
case QTextOption::RightTab: |
|
2574 |
tab = QFixed::fromReal(tabSpec.position) * dpiScale - length; |
|
2575 |
if (tab < 0) // default to tab taking no space |
|
2576 |
return QFixed(); |
|
2577 |
break; |
|
2578 |
case QTextOption::LeftTab: |
|
2579 |
break; |
|
2580 |
} |
|
2581 |
} |
|
2582 |
return tab - x; |
|
2583 |
} |
|
2584 |
} |
|
2585 |
} |
|
2586 |
QFixed tab = QFixed::fromReal(option.tabStop()); |
|
2587 |
if (tab <= 0) |
|
2588 |
tab = 80; // default |
|
2589 |
tab *= dpiScale; |
|
2590 |
QFixed nextTabPos = ((x / tab).truncate() + 1) * tab; |
|
2591 |
QFixed tabWidth = nextTabPos - x; |
|
2592 |
||
2593 |
return tabWidth; |
|
2594 |
} |
|
2595 |
||
2596 |
void QTextEngine::resolveAdditionalFormats() const |
|
2597 |
{
|
|
2598 |
if (!specialData || specialData->addFormats.isEmpty() |
|
2599 |
|| !block.docHandle() |
|
2600 |
|| !specialData->resolvedFormatIndices.isEmpty()) |
|
2601 |
return; |
|
2602 |
||
2603 |
QTextFormatCollection *collection = this->formats(); |
|
2604 |
||
2605 |
specialData->resolvedFormatIndices.clear(); |
|
2606 |
QVector<int> indices(layoutData->items.count()); |
|
2607 |
for (int i = 0; i < layoutData->items.count(); ++i) {
|
|
2608 |
QTextCharFormat f = format(&layoutData->items.at(i)); |
|
2609 |
indices[i] = collection->indexForFormat(f); |
|
2610 |
} |
|
2611 |
specialData->resolvedFormatIndices = indices; |
|
2612 |
} |
|
2613 |
||
2614 |
QStackTextEngine::QStackTextEngine(const QString &string, const QFont &f) |
|
2615 |
: _layoutData(string, _memory, MemSize) |
|
2616 |
{
|
|
2617 |
fnt = f; |
|
2618 |
text = string; |
|
2619 |
stackEngine = true; |
|
2620 |
layoutData = &_layoutData; |
|
2621 |
} |
|
2622 |
||
2623 |
QTextItemInt::QTextItemInt(const QScriptItem &si, QFont *font, const QTextCharFormat &format) |
|
2624 |
: justified(false), underlineStyle(QTextCharFormat::NoUnderline), charFormat(format), |
|
2625 |
num_chars(0), chars(0), logClusters(0), f(0), fontEngine(0) |
|
2626 |
{
|
|
2627 |
// explicitly initialize flags so that initFontAttributes can be called |
|
2628 |
// multiple times on the same TextItem |
|
2629 |
flags = 0; |
|
2630 |
if (si.analysis.bidiLevel %2) |
|
2631 |
flags |= QTextItem::RightToLeft; |
|
2632 |
ascent = si.ascent; |
|
2633 |
descent = si.descent; |
|
2634 |
f = font; |
|
2635 |
fontEngine = f->d->engineForScript(si.analysis.script); |
|
2636 |
Q_ASSERT(fontEngine); |
|
2637 |
||
2638 |
if (format.hasProperty(QTextFormat::TextUnderlineStyle)) {
|
|
2639 |
underlineStyle = format.underlineStyle(); |
|
2640 |
} else if (format.boolProperty(QTextFormat::FontUnderline) |
|
2641 |
|| f->d->underline) {
|
|
2642 |
underlineStyle = QTextCharFormat::SingleUnderline; |
|
2643 |
} |
|
2644 |
||
2645 |
// compat |
|
2646 |
if (underlineStyle == QTextCharFormat::SingleUnderline) |
|
2647 |
flags |= QTextItem::Underline; |
|
2648 |
||
2649 |
if (f->d->overline || format.fontOverline()) |
|
2650 |
flags |= QTextItem::Overline; |
|
2651 |
if (f->d->strikeOut || format.fontStrikeOut()) |
|
2652 |
flags |= QTextItem::StrikeOut; |
|
2653 |
} |
|
2654 |
||
2655 |
QTextItemInt QTextItemInt::midItem(QFontEngine *fontEngine, int firstGlyphIndex, int numGlyphs) const |
|
2656 |
{
|
|
2657 |
QTextItemInt ti = *this; |
|
2658 |
const int end = firstGlyphIndex + numGlyphs; |
|
2659 |
ti.glyphs = glyphs.mid(firstGlyphIndex, numGlyphs); |
|
2660 |
ti.fontEngine = fontEngine; |
|
2661 |
||
2662 |
if (logClusters && chars) {
|
|
2663 |
const int logClusterOffset = logClusters[0]; |
|
2664 |
while (logClusters[ti.chars - chars] - logClusterOffset < firstGlyphIndex) |
|
2665 |
++ti.chars; |
|
2666 |
||
2667 |
ti.logClusters += (ti.chars - chars); |
|
2668 |
||
2669 |
ti.num_chars = 0; |
|
2670 |
int char_start = ti.chars - chars; |
|
2671 |
while (char_start + ti.num_chars < num_chars && ti.logClusters[ti.num_chars] - logClusterOffset < end) |
|
2672 |
++ti.num_chars; |
|
2673 |
} |
|
2674 |
return ti; |
|
2675 |
} |
|
2676 |
||
2677 |
||
2678 |
QTransform qt_true_matrix(qreal w, qreal h, QTransform x) |
|
2679 |
{
|
|
2680 |
QRectF rect = x.mapRect(QRectF(0, 0, w, h)); |
|
2681 |
return x * QTransform::fromTranslate(-rect.x(), -rect.y()); |
|
2682 |
} |
|
2683 |
||
2684 |
||
2685 |
glyph_metrics_t glyph_metrics_t::transformed(const QTransform &matrix) const |
|
2686 |
{
|
|
2687 |
if (matrix.type() < QTransform::TxTranslate) |
|
2688 |
return *this; |
|
2689 |
||
2690 |
glyph_metrics_t m = *this; |
|
2691 |
||
2692 |
qreal w = width.toReal(); |
|
2693 |
qreal h = height.toReal(); |
|
2694 |
QTransform xform = qt_true_matrix(w, h, matrix); |
|
2695 |
||
2696 |
QRectF rect(0, 0, w, h); |
|
2697 |
rect = xform.mapRect(rect); |
|
2698 |
m.width = QFixed::fromReal(rect.width()); |
|
2699 |
m.height = QFixed::fromReal(rect.height()); |
|
2700 |
||
2701 |
QLineF l = xform.map(QLineF(x.toReal(), y.toReal(), xoff.toReal(), yoff.toReal())); |
|
2702 |
||
2703 |
m.x = QFixed::fromReal(l.x1()); |
|
2704 |
m.y = QFixed::fromReal(l.y1()); |
|
2705 |
||
2706 |
// The offset is relative to the baseline which is why we use dx/dy of the line |
|
2707 |
m.xoff = QFixed::fromReal(l.dx()); |
|
2708 |
m.yoff = QFixed::fromReal(l.dy()); |
|
2709 |
||
2710 |
return m; |
|
2711 |
} |
|
2712 |
||
2713 |
||
2714 |
QT_END_NAMESPACE |