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Diffstat (limited to 'src/assistant/lib/qhelpindexwidget.cpp')
| -rw-r--r-- | src/assistant/lib/qhelpindexwidget.cpp | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/src/assistant/lib/qhelpindexwidget.cpp b/src/assistant/lib/qhelpindexwidget.cpp new file mode 100644 index 000000000..82d402442 --- /dev/null +++ b/src/assistant/lib/qhelpindexwidget.cpp @@ -0,0 +1,444 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt Assistant of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qhelpindexwidget.h" +#include "qhelpenginecore.h" +#include "qhelpengine_p.h" +#include "qhelpdbreader_p.h" + +#include <QtCore/QThread> +#include <QtCore/QMutex> +#include <QtGui/QListView> +#include <QtGui/QHeaderView> + +QT_BEGIN_NAMESPACE + +class QHelpIndexProvider : public QThread +{ +public: + QHelpIndexProvider(QHelpEnginePrivate *helpEngine); + ~QHelpIndexProvider(); + void collectIndices(const QString &customFilterName); + void stopCollecting(); + QStringList indices() const; + QList<QHelpDBReader*> activeReaders() const; + QSet<int> indexIds(QHelpDBReader *reader) const; + +private: + void run(); + + QHelpEnginePrivate *m_helpEngine; + QStringList m_indices; + QList<QHelpDBReader*> m_activeReaders; + QMap<QHelpDBReader*, QSet<int> > m_indexIds; + QStringList m_filterAttributes; + mutable QMutex m_mutex; + bool m_abort; +}; + +class QHelpIndexModelPrivate +{ +public: + QHelpIndexModelPrivate(QHelpEnginePrivate *hE) + { + helpEngine = hE; + indexProvider = new QHelpIndexProvider(helpEngine); + insertedRows = 0; + } + + QHelpEnginePrivate *helpEngine; + QHelpIndexProvider *indexProvider; + QStringList indices; + int insertedRows; + QString currentFilter; + QList<QHelpDBReader*> activeReaders; +}; + +static bool caseInsensitiveLessThan(const QString &as, const QString &bs) +{ + return QString::compare(as, bs, Qt::CaseInsensitive) < 0; +} + +QHelpIndexProvider::QHelpIndexProvider(QHelpEnginePrivate *helpEngine) + : QThread(helpEngine) +{ + m_helpEngine = helpEngine; + m_abort = false; +} + +QHelpIndexProvider::~QHelpIndexProvider() +{ + stopCollecting(); +} + +void QHelpIndexProvider::collectIndices(const QString &customFilterName) +{ + m_mutex.lock(); + m_filterAttributes = m_helpEngine->q->filterAttributes(customFilterName); + m_mutex.unlock(); + if (!isRunning()) { + start(LowPriority); + } else { + stopCollecting(); + start(LowPriority); + } +} + +void QHelpIndexProvider::stopCollecting() +{ + if (!isRunning()) + return; + m_mutex.lock(); + m_abort = true; + m_mutex.unlock(); + wait(); + m_abort = false; +} + +QStringList QHelpIndexProvider::indices() const +{ + QMutexLocker lck(&m_mutex); + return m_indices; +} + +QList<QHelpDBReader*> QHelpIndexProvider::activeReaders() const +{ + QMutexLocker lck(&m_mutex); + return m_activeReaders; +} + +QSet<int> QHelpIndexProvider::indexIds(QHelpDBReader *reader) const +{ + QMutexLocker lck(&m_mutex); + if (m_indexIds.contains(reader)) + return m_indexIds.value(reader); + return QSet<int>(); +} + +void QHelpIndexProvider::run() +{ + m_mutex.lock(); + QStringList atts = m_filterAttributes; + m_indices.clear(); + m_activeReaders.clear(); + QSet<QString> indicesSet; + m_mutex.unlock(); + + foreach (const QString &dbFileName, m_helpEngine->fileNameReaderMap.keys()) { + m_mutex.lock(); + if (m_abort) { + m_mutex.unlock(); + return; + } + m_mutex.unlock(); + QHelpDBReader reader(dbFileName, + QHelpGlobal::uniquifyConnectionName(dbFileName + + QLatin1String("FromIndexProvider"), + QThread::currentThread()), 0); + if (!reader.init()) + continue; + QStringList lst = reader.indicesForFilter(atts); + if (!lst.isEmpty()) { + m_mutex.lock(); + foreach (const QString &s, lst) + indicesSet.insert(s); + if (m_abort) { + m_mutex.unlock(); + return; + } + QHelpDBReader *orgReader = m_helpEngine->fileNameReaderMap.value(dbFileName); + m_indexIds.insert(orgReader, reader.indexIds(atts)); + m_activeReaders.append(orgReader); + m_mutex.unlock(); + } + } + m_mutex.lock(); + m_indices = indicesSet.values(); + qSort(m_indices.begin(), m_indices.end(), caseInsensitiveLessThan); + m_mutex.unlock(); +} + + + +/*! + \class QHelpIndexModel + \since 4.4 + \inmodule QtHelp + \brief The QHelpIndexModel class provides a model that + supplies index keywords to views. + + +*/ + +/*! + \fn void QHelpIndexModel::indexCreationStarted() + + This signal is emitted when the creation of a new index + has started. The current index is invalid from this + point on until the signal indexCreated() is emitted. + + \sa isCreatingIndex() +*/ + +/*! + \fn void QHelpIndexModel::indexCreated() + + This signal is emitted when the index has been created. +*/ + +QHelpIndexModel::QHelpIndexModel(QHelpEnginePrivate *helpEngine) + : QStringListModel(helpEngine) +{ + d = new QHelpIndexModelPrivate(helpEngine); + + connect(d->indexProvider, SIGNAL(finished()), this, SLOT(insertIndices())); + connect(helpEngine->q, SIGNAL(setupStarted()), this, SLOT(invalidateIndex())); +} + +QHelpIndexModel::~QHelpIndexModel() +{ + delete d; +} + +void QHelpIndexModel::invalidateIndex(bool onShutDown) +{ + if (onShutDown) + disconnect(this, SLOT(insertIndices())); + d->indexProvider->stopCollecting(); + d->indices.clear(); + if (!onShutDown) + filter(QString()); +} + +/*! + Creates a new index by querying the help system for + keywords for the specified \a customFilterName. +*/ +void QHelpIndexModel::createIndex(const QString &customFilterName) +{ + d->currentFilter = customFilterName; + d->indexProvider->collectIndices(customFilterName); + emit indexCreationStarted(); +} + +void QHelpIndexModel::insertIndices() +{ + d->indices = d->indexProvider->indices(); + d->activeReaders = d->indexProvider->activeReaders(); + QStringList attributes = d->helpEngine->q->filterAttributes(d->currentFilter); + if (attributes.count() > 1) { + foreach (QHelpDBReader *r, d->activeReaders) + r->createAttributesCache(attributes, d->indexProvider->indexIds(r)); + } + filter(QString()); + emit indexCreated(); +} + +/*! + Returns true if the index is currently built up, otherwise + false. +*/ +bool QHelpIndexModel::isCreatingIndex() const +{ + return d->indexProvider->isRunning(); +} + +/*! + Returns all hits found for the \a keyword. A hit consists of + the URL and the document title. +*/ +QMap<QString, QUrl> QHelpIndexModel::linksForKeyword(const QString &keyword) const +{ + QMap<QString, QUrl> linkMap; + QStringList filterAttributes = d->helpEngine->q->filterAttributes(d->currentFilter); + foreach (QHelpDBReader *reader, d->activeReaders) + reader->linksForKeyword(keyword, filterAttributes, linkMap); + return linkMap; +} + +/*! + Filters the indices and returns the model index of the best + matching keyword. In a first step, only the keywords containing + \a filter are kept in the model's index list. Analogously, if + \a wildcard is not empty, only the keywords matched are left + in the index list. In a second step, the best match is + determined and its index model returned. When specifying a + wildcard expression, the \a filter string is used to + search for the best match. +*/ +QModelIndex QHelpIndexModel::filter(const QString &filter, const QString &wildcard) +{ + if (filter.isEmpty()) { + setStringList(d->indices); + return index(-1, 0, QModelIndex()); + } + + QStringList lst; + int goodMatch = -1; + int perfectMatch = -1; + + if (!wildcard.isEmpty()) { + QRegExp regExp(wildcard, Qt::CaseInsensitive); + regExp.setPatternSyntax(QRegExp::Wildcard); + foreach (const QString &index, d->indices) { + if (index.contains(regExp)) { + lst.append(index); + if (perfectMatch == -1 && index.startsWith(filter, Qt::CaseInsensitive)) { + if (goodMatch == -1) + goodMatch = lst.count()-1; + if (filter.length() == index.length()){ + perfectMatch = lst.count()-1; + } + } else if (perfectMatch > -1 && index == filter) { + perfectMatch = lst.count()-1; + } + } + } + } else { + foreach (const QString &index, d->indices) { + if (index.contains(filter, Qt::CaseInsensitive)) { + lst.append(index); + if (perfectMatch == -1 && index.startsWith(filter, Qt::CaseInsensitive)) { + if (goodMatch == -1) + goodMatch = lst.count()-1; + if (filter.length() == index.length()){ + perfectMatch = lst.count()-1; + } + } else if (perfectMatch > -1 && index == filter) { + perfectMatch = lst.count()-1; + } + } + } + + } + + if (perfectMatch == -1) + perfectMatch = qMax(0, goodMatch); + + setStringList(lst); + return index(perfectMatch, 0, QModelIndex()); +} + + + +/*! + \class QHelpIndexWidget + \inmodule QtHelp + \since 4.4 + \brief The QHelpIndexWidget class provides a list view + displaying the QHelpIndexModel. +*/ + +/*! + \fn void QHelpIndexWidget::linkActivated(const QUrl &link, + const QString &keyword) + + This signal is emitted when an item is activated and its + associated \a link should be shown. To know where the link + belongs to, the \a keyword is given as a second paremeter. +*/ + +/*! + \fn void QHelpIndexWidget::linksActivated(const QMap<QString, QUrl> &links, + const QString &keyword) + + This signal is emitted when the item representing the \a keyword + is activated and the item has more than one link associated. + The \a links consist of the document title and their URL. +*/ + +QHelpIndexWidget::QHelpIndexWidget() + : QListView(0) +{ + setEditTriggers(QAbstractItemView::NoEditTriggers); + setUniformItemSizes(true); + connect(this, SIGNAL(activated(QModelIndex)), + this, SLOT(showLink(QModelIndex))); +} + +void QHelpIndexWidget::showLink(const QModelIndex &index) +{ + if (!index.isValid()) + return; + + QHelpIndexModel *indexModel = qobject_cast<QHelpIndexModel*>(model()); + if (!indexModel) + return; + QVariant v = indexModel->data(index, Qt::DisplayRole); + QString name; + if (v.isValid()) + name = v.toString(); + + QMap<QString, QUrl> links = indexModel->linksForKeyword(name); + if (links.count() == 1) { + emit linkActivated(links.constBegin().value(), name); + } else if (links.count() > 1) { + emit linksActivated(links, name); + } +} + +/*! + Activates the current item which will result eventually in + the emitting of a linkActivated() or linksActivated() + signal. +*/ +void QHelpIndexWidget::activateCurrentItem() +{ + showLink(currentIndex()); +} + +/*! + Filters the indices according to \a filter or \a wildcard. + The item with the best match is set as current item. + + \sa QHelpIndexModel::filter() +*/ +void QHelpIndexWidget::filterIndices(const QString &filter, const QString &wildcard) +{ + QHelpIndexModel *indexModel = qobject_cast<QHelpIndexModel*>(model()); + if (!indexModel) + return; + QModelIndex idx = indexModel->filter(filter, wildcard); + if (idx.isValid()) + setCurrentIndex(idx); +} + +QT_END_NAMESPACE |