diff options
Diffstat (limited to 'src/assistant/tools/assistant/helpenginewrapper.cpp')
| -rw-r--r-- | src/assistant/tools/assistant/helpenginewrapper.cpp | 844 |
1 files changed, 844 insertions, 0 deletions
diff --git a/src/assistant/tools/assistant/helpenginewrapper.cpp b/src/assistant/tools/assistant/helpenginewrapper.cpp new file mode 100644 index 000000000..4c7ff5b30 --- /dev/null +++ b/src/assistant/tools/assistant/helpenginewrapper.cpp @@ -0,0 +1,844 @@ +/**************************************************************************** +** +** 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 "tracer.h" + +#include "helpenginewrapper.h" +#include "../shared/collectionconfiguration.h" + +#include <QtCore/QDateTime> +#include <QtCore/QFileInfo> +#include <QtCore/QFileSystemWatcher> +#include <QtCore/QPair> +#include <QtCore/QSharedPointer> +#include <QtCore/QTimer> +#include <QtHelp/QHelpContentModel> +#include <QtHelp/QHelpEngine> +#include <QtHelp/QHelpIndexModel> +#include <QtHelp/QHelpSearchEngine> + +QT_BEGIN_NAMESPACE + +namespace { + const QString Unfiltered; + const QString AppFontKey(QLatin1String("appFont")); + const QString AppWritingSystemKey(QLatin1String("appWritingSystem")); + const QString BookmarksKey(QLatin1String("Bookmarks")); + const QString BrowserFontKey(QLatin1String("browserFont")); + const QString BrowserWritingSystemKey(QLatin1String("browserWritingSystem")); + const QString HomePageKey(QLatin1String("homepage")); + const QString MainWindowKey(QLatin1String("MainWindow")); + const QString MainWindowGeometryKey(QLatin1String("MainWindowGeometry")); + const QString SearchWasAttachedKey(QLatin1String("SearchWasAttached")); + const QString StartOptionKey(QLatin1String("StartOption")); + const QString UseAppFontKey(QLatin1String("useAppFont")); + const QString UseBrowserFontKey(QLatin1String("useBrowserFont")); + const QString VersionKey(QString(QLatin1String("qtVersion%1$$$%2")). + arg(QLatin1String(QT_VERSION_STR))); + const QString ShowTabsKey(QLatin1String("showTabs")); +} // anonymous namespace + +class TimeoutForwarder : public QObject +{ + Q_OBJECT +public: + TimeoutForwarder(const QString &fileName); +private slots: + void forward(); +private: + friend class HelpEngineWrapperPrivate; + + const QString m_fileName; +}; + +class HelpEngineWrapperPrivate : public QObject +{ + Q_OBJECT + friend class HelpEngineWrapper; + friend class TimeoutForwarder; +private slots: + void qchFileChanged(const QString &fileName); + +signals: + void documentationRemoved(const QString &namespaceName); + void documentationUpdated(const QString &namespaceName); + +private: + HelpEngineWrapperPrivate(const QString &collectionFile); + + void initFileSystemWatchers(); + void checkDocFilesWatched(); + void qchFileChanged(const QString &fileName, bool fromTimeout); + + static const int UpdateGracePeriod = 2000; + + QHelpEngine * const m_helpEngine; + QFileSystemWatcher * const m_qchWatcher; + typedef QPair<QDateTime, QSharedPointer<TimeoutForwarder> > RecentSignal; + QMap<QString, RecentSignal> m_recentQchUpdates; +}; + +const QString HelpEngineWrapper::TrUnfiltered = HelpEngineWrapper::tr("Unfiltered"); + +HelpEngineWrapper *HelpEngineWrapper::helpEngineWrapper = 0; + +HelpEngineWrapper &HelpEngineWrapper::instance(const QString &collectionFile) +{ + TRACE_OBJ + /* + * Note that this Singleton cannot be static, because it has to be + * deleted before the QApplication. + */ + if (helpEngineWrapper == 0) + helpEngineWrapper = new HelpEngineWrapper(collectionFile); + return *helpEngineWrapper; +} + +void HelpEngineWrapper::removeInstance() +{ + TRACE_OBJ + delete helpEngineWrapper; + helpEngineWrapper = 0; +} + +HelpEngineWrapper::HelpEngineWrapper(const QString &collectionFile) + : d(new HelpEngineWrapperPrivate(collectionFile)) +{ + TRACE_OBJ + + /* + * Otherwise we will waste time if several new docs are found, + * because we will start to index them, only to be interrupted + * by the next request. Also, there is a nasty SQLITE bug that will + * cause the application to hang for minutes in that case. + * This call is reverted by initialDocSetupDone(), which must be + * called after the new docs have been installed. + */ + disconnect(d->m_helpEngine, SIGNAL(setupFinished()), + searchEngine(), SLOT(indexDocumentation())); + + connect(d, SIGNAL(documentationRemoved(QString)), + this, SIGNAL(documentationRemoved(QString))); + connect(d, SIGNAL(documentationUpdated(QString)), + this, SIGNAL(documentationUpdated(QString))); + connect(d->m_helpEngine, SIGNAL(currentFilterChanged(QString)), + this, SLOT(handleCurrentFilterChanged(QString))); + connect(d->m_helpEngine, SIGNAL(setupFinished()), + this, SIGNAL(setupFinished())); +} + +HelpEngineWrapper::~HelpEngineWrapper() +{ + TRACE_OBJ + const QStringList &namespaces = d->m_helpEngine->registeredDocumentations(); + foreach (const QString &nameSpace, namespaces) { + const QString &docFile + = d->m_helpEngine->documentationFileName(nameSpace); + d->m_qchWatcher->removePath(docFile); + } + + delete d; +} + +void HelpEngineWrapper::initialDocSetupDone() +{ + TRACE_OBJ + connect(d->m_helpEngine, SIGNAL(setupFinished()), + searchEngine(), SLOT(indexDocumentation())); + setupData(); +} + +QHelpSearchEngine *HelpEngineWrapper::searchEngine() const +{ + TRACE_OBJ + return d->m_helpEngine->searchEngine(); +} + +QHelpContentModel *HelpEngineWrapper::contentModel() const +{ + TRACE_OBJ + return d->m_helpEngine->contentModel(); +} + +QHelpIndexModel *HelpEngineWrapper::indexModel() const +{ + TRACE_OBJ + return d->m_helpEngine->indexModel(); +} + +QHelpContentWidget *HelpEngineWrapper::contentWidget() +{ + TRACE_OBJ + return d->m_helpEngine->contentWidget(); +} + +QHelpIndexWidget *HelpEngineWrapper::indexWidget() +{ + TRACE_OBJ + return d->m_helpEngine->indexWidget(); +} + +const QStringList HelpEngineWrapper::registeredDocumentations() const +{ + TRACE_OBJ + return d->m_helpEngine->registeredDocumentations(); +} + +const QString HelpEngineWrapper::collectionFile() const +{ + TRACE_OBJ + return d->m_helpEngine->collectionFile(); +} + +bool HelpEngineWrapper::registerDocumentation(const QString &docFile) +{ + TRACE_OBJ + d->checkDocFilesWatched(); + if (!d->m_helpEngine->registerDocumentation(docFile)) + return false; + d->m_qchWatcher->addPath(docFile); + d->checkDocFilesWatched(); + return true; +} + +bool HelpEngineWrapper::unregisterDocumentation(const QString &namespaceName) +{ + TRACE_OBJ + d->checkDocFilesWatched(); + const QString &file = d->m_helpEngine->documentationFileName(namespaceName); + if (!d->m_helpEngine->unregisterDocumentation(namespaceName)) + return false; + d->m_qchWatcher->removePath(file); + d->checkDocFilesWatched(); + return true; +} + +bool HelpEngineWrapper::setupData() +{ + TRACE_OBJ + return d->m_helpEngine->setupData(); +} + +bool HelpEngineWrapper::addCustomFilter(const QString &filterName, + const QStringList &attributes) +{ + TRACE_OBJ + return d->m_helpEngine->addCustomFilter(filterName, attributes); +} + +bool HelpEngineWrapper::removeCustomFilter(const QString &filterName) +{ + TRACE_OBJ + return d->m_helpEngine->removeCustomFilter(filterName); +} + +void HelpEngineWrapper::setCurrentFilter(const QString ¤tFilter) +{ + TRACE_OBJ + const QString &filter + = currentFilter == TrUnfiltered ? Unfiltered : currentFilter; + d->m_helpEngine->setCurrentFilter(filter); +} + +const QString HelpEngineWrapper::currentFilter() const +{ + TRACE_OBJ + const QString &filter = d->m_helpEngine->currentFilter(); + return filter == Unfiltered ? TrUnfiltered : filter; +} + +const QStringList HelpEngineWrapper::customFilters() const +{ + TRACE_OBJ + QStringList filters = d->m_helpEngine->customFilters(); + filters.removeOne(Unfiltered); + filters.prepend(TrUnfiltered); + return filters; +} + +QUrl HelpEngineWrapper::findFile(const QUrl &url) const +{ + TRACE_OBJ + return d->m_helpEngine->findFile(url); +} + +QByteArray HelpEngineWrapper::fileData(const QUrl &url) const +{ + TRACE_OBJ + return d->m_helpEngine->fileData(url); +} + +QMap<QString, QUrl> HelpEngineWrapper::linksForIdentifier(const QString &id) const +{ + TRACE_OBJ + return d->m_helpEngine->linksForIdentifier(id); +} + +const QStringList HelpEngineWrapper::filterAttributes() const +{ + TRACE_OBJ + return d->m_helpEngine->filterAttributes(); +} + +const QStringList HelpEngineWrapper::filterAttributes(const QString &filterName) const +{ + TRACE_OBJ + return d->m_helpEngine->filterAttributes(filterName); +} + +QString HelpEngineWrapper::error() const +{ + TRACE_OBJ + return d->m_helpEngine->error(); +} + +const QStringList HelpEngineWrapper::qtDocInfo(const QString &component) const +{ + TRACE_OBJ + return d->m_helpEngine->customValue(VersionKey.arg(component)).toString(). + split(CollectionConfiguration::ListSeparator); +} + +void HelpEngineWrapper::setQtDocInfo(const QString &component, + const QStringList &doc) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(VersionKey.arg(component), + doc.join(CollectionConfiguration::ListSeparator)); +} + +const QStringList HelpEngineWrapper::lastShownPages() const +{ + TRACE_OBJ + return CollectionConfiguration::lastShownPages(*d->m_helpEngine); +} + +void HelpEngineWrapper::setLastShownPages(const QStringList &lastShownPages) +{ + TRACE_OBJ + CollectionConfiguration::setLastShownPages(*d->m_helpEngine, lastShownPages); +} + +const QStringList HelpEngineWrapper::lastZoomFactors() const +{ + TRACE_OBJ + return CollectionConfiguration::lastZoomFactors(*d->m_helpEngine); +} + +void HelpEngineWrapper::setLastZoomFactors(const QStringList &lastZoomFactors) +{ + TRACE_OBJ + CollectionConfiguration::setLastZoomFactors(*d->m_helpEngine, lastZoomFactors); +} + +const QString HelpEngineWrapper::cacheDir() const +{ + TRACE_OBJ + return CollectionConfiguration::cacheDir(*d->m_helpEngine); +} + +bool HelpEngineWrapper::cacheDirIsRelativeToCollection() const +{ + TRACE_OBJ + return CollectionConfiguration::cacheDirIsRelativeToCollection(*d->m_helpEngine); +} + +void HelpEngineWrapper::setCacheDir(const QString &cacheDir, + bool relativeToCollection) +{ + TRACE_OBJ + CollectionConfiguration::setCacheDir(*d->m_helpEngine, cacheDir, + relativeToCollection); +} + +bool HelpEngineWrapper::filterFunctionalityEnabled() const +{ + TRACE_OBJ + return CollectionConfiguration::filterFunctionalityEnabled(*d->m_helpEngine); +} + +void HelpEngineWrapper::setFilterFunctionalityEnabled(bool enabled) +{ + TRACE_OBJ + CollectionConfiguration::setFilterFunctionalityEnabled(*d->m_helpEngine, + enabled); +} + +bool HelpEngineWrapper::filterToolbarVisible() const +{ + TRACE_OBJ + return CollectionConfiguration::filterToolbarVisible(*d->m_helpEngine); +} + +void HelpEngineWrapper::setFilterToolbarVisible(bool visible) +{ + TRACE_OBJ + CollectionConfiguration::setFilterToolbarVisible(*d->m_helpEngine, visible); +} + +bool HelpEngineWrapper::addressBarEnabled() const +{ + TRACE_OBJ + return CollectionConfiguration::addressBarEnabled(*d->m_helpEngine); +} + +void HelpEngineWrapper::setAddressBarEnabled(bool enabled) +{ + TRACE_OBJ + CollectionConfiguration::setAddressBarEnabled(*d->m_helpEngine, enabled); +} + +bool HelpEngineWrapper::addressBarVisible() const +{ + TRACE_OBJ + return CollectionConfiguration::addressBarVisible(*d->m_helpEngine); +} + +void HelpEngineWrapper::setAddressBarVisible(bool visible) +{ + TRACE_OBJ + CollectionConfiguration::setAddressBarVisible(*d->m_helpEngine, visible); +} + +bool HelpEngineWrapper::documentationManagerEnabled() const +{ + TRACE_OBJ + return CollectionConfiguration::documentationManagerEnabled(*d->m_helpEngine); +} + +void HelpEngineWrapper::setDocumentationManagerEnabled(bool enabled) +{ + TRACE_OBJ + CollectionConfiguration::setDocumentationManagerEnabled(*d->m_helpEngine, + enabled); +} + +const QByteArray HelpEngineWrapper::aboutMenuTexts() const +{ + TRACE_OBJ + return CollectionConfiguration::aboutMenuTexts(*d->m_helpEngine); +} + +void HelpEngineWrapper::setAboutMenuTexts(const QByteArray &texts) +{ + TRACE_OBJ + CollectionConfiguration::setAboutMenuTexts(*d->m_helpEngine, texts); +} + +const QByteArray HelpEngineWrapper::aboutIcon() const +{ + TRACE_OBJ + return CollectionConfiguration::aboutIcon(*d->m_helpEngine); +} + +void HelpEngineWrapper::setAboutIcon(const QByteArray &icon) +{ + TRACE_OBJ + CollectionConfiguration::setAboutIcon(*d->m_helpEngine, icon); +} + +const QByteArray HelpEngineWrapper::aboutImages() const +{ + TRACE_OBJ + return CollectionConfiguration::aboutImages(*d->m_helpEngine); +} + +void HelpEngineWrapper::setAboutImages(const QByteArray &images) +{ + TRACE_OBJ + CollectionConfiguration::setAboutImages(*d->m_helpEngine, images); +} + +const QByteArray HelpEngineWrapper::aboutTexts() const +{ + TRACE_OBJ + return CollectionConfiguration::aboutTexts(*d->m_helpEngine); +} + +void HelpEngineWrapper::setAboutTexts(const QByteArray &texts) +{ + TRACE_OBJ + CollectionConfiguration::setAboutTexts(*d->m_helpEngine, texts); +} + +const QString HelpEngineWrapper::windowTitle() const +{ + TRACE_OBJ + return CollectionConfiguration::windowTitle(*d->m_helpEngine); +} + +void HelpEngineWrapper::setWindowTitle(const QString &windowTitle) +{ + TRACE_OBJ + CollectionConfiguration::setWindowTitle(*d->m_helpEngine, windowTitle); +} + +const QByteArray HelpEngineWrapper::applicationIcon() const +{ + TRACE_OBJ + return CollectionConfiguration::applicationIcon(*d->m_helpEngine); +} + +void HelpEngineWrapper::setApplicationIcon(const QByteArray &icon) +{ + TRACE_OBJ + CollectionConfiguration::setApplicationIcon(*d->m_helpEngine, icon); +} + +const QByteArray HelpEngineWrapper::mainWindow() const +{ + TRACE_OBJ + return d->m_helpEngine->customValue(MainWindowKey).toByteArray(); +} + +void HelpEngineWrapper::setMainWindow(const QByteArray &mainWindow) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(MainWindowKey, mainWindow); +} + +const QByteArray HelpEngineWrapper::mainWindowGeometry() const +{ + TRACE_OBJ + return d->m_helpEngine->customValue(MainWindowGeometryKey).toByteArray(); +} + +void HelpEngineWrapper::setMainWindowGeometry(const QByteArray &geometry) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(MainWindowGeometryKey, geometry); +} + +const QByteArray HelpEngineWrapper::bookmarks() const +{ + TRACE_OBJ + return d->m_helpEngine->customValue(BookmarksKey).toByteArray(); +} + +void HelpEngineWrapper::setBookmarks(const QByteArray &bookmarks) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(BookmarksKey, bookmarks); +} + +int HelpEngineWrapper::lastTabPage() const +{ + TRACE_OBJ + return CollectionConfiguration::lastTabPage(*d->m_helpEngine); +} + +void HelpEngineWrapper::setLastTabPage(int lastPage) +{ + TRACE_OBJ + CollectionConfiguration::setLastTabPage(*d->m_helpEngine, lastPage); +} + +int HelpEngineWrapper::startOption() const +{ + TRACE_OBJ + return d->m_helpEngine->customValue(StartOptionKey, ShowLastPages).toInt(); +} + +void HelpEngineWrapper::setStartOption(int option) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(StartOptionKey, option); +} + +const QString HelpEngineWrapper::homePage() const +{ + TRACE_OBJ + const QString &homePage + = d->m_helpEngine->customValue(HomePageKey).toString(); + if (!homePage.isEmpty()) + return homePage; + return defaultHomePage(); +} + +void HelpEngineWrapper::setHomePage(const QString &page) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(HomePageKey, page); + +} + +const QString HelpEngineWrapper::defaultHomePage() const +{ + TRACE_OBJ + return CollectionConfiguration::defaultHomePage(*d->m_helpEngine); +} + +void HelpEngineWrapper::setDefaultHomePage(const QString &page) +{ + TRACE_OBJ + CollectionConfiguration::setDefaultHomePage(*d->m_helpEngine, page); +} + +bool HelpEngineWrapper::hasFontSettings() const +{ + TRACE_OBJ + return d->m_helpEngine->customValue(UseAppFontKey).isValid(); +} + +bool HelpEngineWrapper::usesAppFont() const +{ + TRACE_OBJ + return d->m_helpEngine->customValue(UseAppFontKey).toBool(); +} + +void HelpEngineWrapper::setUseAppFont(bool useAppFont) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(UseAppFontKey, useAppFont); +} + +bool HelpEngineWrapper::usesBrowserFont() const +{ + TRACE_OBJ + return d->m_helpEngine->customValue(UseBrowserFontKey, false).toBool(); +} + +void HelpEngineWrapper::setUseBrowserFont(bool useBrowserFont) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(UseBrowserFontKey, useBrowserFont); +} + +const QFont HelpEngineWrapper::appFont() const +{ + TRACE_OBJ + return qvariant_cast<QFont>(d->m_helpEngine->customValue(AppFontKey)); +} + +void HelpEngineWrapper::setAppFont(const QFont &font) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(AppFontKey, font); +} + +QFontDatabase::WritingSystem HelpEngineWrapper::appWritingSystem() const +{ + TRACE_OBJ + return static_cast<QFontDatabase::WritingSystem>( + d->m_helpEngine->customValue(AppWritingSystemKey).toInt()); +} + +void HelpEngineWrapper::setAppWritingSystem(QFontDatabase::WritingSystem system) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(AppWritingSystemKey, system); +} + +const QFont HelpEngineWrapper::browserFont() const +{ + TRACE_OBJ + return qvariant_cast<QFont>(d->m_helpEngine->customValue(BrowserFontKey)); +} + +void HelpEngineWrapper::setBrowserFont(const QFont &font) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(BrowserFontKey, font); +} + +QFontDatabase::WritingSystem HelpEngineWrapper::browserWritingSystem() const +{ + TRACE_OBJ + return static_cast<QFontDatabase::WritingSystem>( + d->m_helpEngine->customValue(BrowserWritingSystemKey).toInt()); +} + +void HelpEngineWrapper::setBrowserWritingSystem(QFontDatabase::WritingSystem system) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(BrowserWritingSystemKey, system); +} + +void HelpEngineWrapper::handleCurrentFilterChanged(const QString &filter) +{ + TRACE_OBJ + const QString &filterToReport + = filter == Unfiltered ? TrUnfiltered : filter; + emit currentFilterChanged(filterToReport); +} + +bool HelpEngineWrapper::showTabs() const +{ + TRACE_OBJ + return d->m_helpEngine->customValue(ShowTabsKey, false).toBool(); +} + +void HelpEngineWrapper::setShowTabs(bool show) +{ + TRACE_OBJ + d->m_helpEngine->setCustomValue(ShowTabsKey, show); +} + +bool HelpEngineWrapper::fullTextSearchFallbackEnabled() const +{ + TRACE_OBJ + return CollectionConfiguration::fullTextSearchFallbackEnabled(*d->m_helpEngine); +} + +// -- TimeoutForwarder + +TimeoutForwarder::TimeoutForwarder(const QString &fileName) + : m_fileName(fileName) +{ + TRACE_OBJ +} + +void TimeoutForwarder::forward() +{ + TRACE_OBJ + HelpEngineWrapper::instance().d->qchFileChanged(m_fileName, true); +} + +// -- HelpEngineWrapperPrivate + +HelpEngineWrapperPrivate::HelpEngineWrapperPrivate(const QString &collectionFile) + : m_helpEngine(new QHelpEngine(collectionFile, this)), + m_qchWatcher(new QFileSystemWatcher(this)) +{ + TRACE_OBJ + if (!m_helpEngine->customFilters().contains(Unfiltered)) + m_helpEngine->addCustomFilter(Unfiltered, QStringList()); + initFileSystemWatchers(); +} + +void HelpEngineWrapperPrivate::initFileSystemWatchers() +{ + TRACE_OBJ + foreach(const QString &ns, m_helpEngine->registeredDocumentations()) { + const QString &docFile = m_helpEngine->documentationFileName(ns); + m_qchWatcher->addPath(docFile); + connect(m_qchWatcher, SIGNAL(fileChanged(QString)), + this, SLOT(qchFileChanged(QString))); + } + checkDocFilesWatched(); +} + +void HelpEngineWrapperPrivate::qchFileChanged(const QString &fileName) +{ + TRACE_OBJ + qchFileChanged(fileName, false); +} + +void HelpEngineWrapperPrivate::checkDocFilesWatched() +{ + TRACE_OBJ + const int watchedFilesCount = m_qchWatcher->files().count(); + const int docFilesCount = m_helpEngine->registeredDocumentations().count(); + if (watchedFilesCount != docFilesCount) { + qWarning("Strange: Have %d docs, but %d are being watched", + watchedFilesCount, docFilesCount); + } +} + +void HelpEngineWrapperPrivate::qchFileChanged(const QString &fileName, + bool fromTimeout) +{ + TRACE_OBJ + + /* + * We don't use QHelpEngineCore::namespaceName(fileName), because the file + * may not exist anymore or contain a different namespace. + */ + QString ns; + foreach (const QString &curNs, m_helpEngine->registeredDocumentations()) { + if (m_helpEngine->documentationFileName(curNs) == fileName) { + ns = curNs; + break; + } + } + + /* + * We can't do an assertion here, because QFileSystemWatcher may send the + * signal more than once. + */ + if (ns.isEmpty()) { + m_recentQchUpdates.remove(fileName); + return; + } + + /* + * Since the QFileSystemWatcher typically sends the signal more than once, + * we repeatedly delay our reaction a bit until we think the last signal + * was sent. + */ + + QMap<QString, RecentSignal>::Iterator it = m_recentQchUpdates.find(fileName); + const QDateTime &now = QDateTime::currentDateTime(); + + // Case 1: This is the first recent signal for the file. + if (it == m_recentQchUpdates.end()) { + QSharedPointer<TimeoutForwarder> forwarder(new TimeoutForwarder(fileName)); + m_recentQchUpdates.insert(fileName, RecentSignal(now, forwarder)); + QTimer::singleShot(UpdateGracePeriod, forwarder.data(), SLOT(forward())); + return; + } + + // Case 2: The last signal for this file has not expired yet. + if (it.value().first > now.addMSecs(-UpdateGracePeriod)) { + if (!fromTimeout) + it.value().first = now; + else + QTimer::singleShot(UpdateGracePeriod, it.value().second.data(), + SLOT(forward())); + return; + } + + // Case 3: The last signal for this file has expired. + if (m_helpEngine->unregisterDocumentation(ns)) { + if (!QFileInfo(fileName).exists() + || !m_helpEngine->registerDocumentation(fileName)) { + m_qchWatcher->removePath(fileName); + emit documentationRemoved(ns); + } else { + emit documentationUpdated(ns); + } + m_helpEngine->setupData(); + } + m_recentQchUpdates.erase(it); +} + +QT_END_NAMESPACE + +#include "helpenginewrapper.moc" |