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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the Qt Assistant of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qhelpdbreader_p.h"
#include "qhelp_global.h"
#include <QtCore/QVariant>
#include <QtCore/QFile>
#include <QtSql/QSqlError>
#include <QtSql/QSqlQuery>
QT_BEGIN_NAMESPACE
QHelpDBReader::QHelpDBReader(const QString &dbName)
: QObject(0)
{
initObject(dbName,
QHelpGlobal::uniquifyConnectionName(QLatin1String("QHelpDBReader"),
this));
}
QHelpDBReader::QHelpDBReader(const QString &dbName, const QString &uniqueId,
QObject *parent)
: QObject(parent)
{
initObject(dbName, uniqueId);
}
void QHelpDBReader::initObject(const QString &dbName, const QString &uniqueId)
{
m_dbName = dbName;
m_uniqueId = uniqueId;
m_initDone = false;
m_query = 0;
m_useAttributesCache = false;
}
QHelpDBReader::~QHelpDBReader()
{
if (m_initDone) {
delete m_query;
QSqlDatabase::removeDatabase(m_uniqueId);
}
}
bool QHelpDBReader::init()
{
if (m_initDone)
return true;
if (!QFile::exists(m_dbName))
return false;
QSqlDatabase db = QSqlDatabase::addDatabase(QLatin1String("QSQLITE"), m_uniqueId);
db.setDatabaseName(m_dbName);
if (!db.open()) {
/*: The placeholders are: %1 - The name of the database which cannot be opened
%2 - The unique id for the connection
%3 - The actual error string */
m_error = tr("Cannot open database '%1' '%2': %3").arg(m_dbName, m_uniqueId, db.lastError().text());
QSqlDatabase::removeDatabase(m_uniqueId);
return false;
}
m_initDone = true;
m_query = new QSqlQuery(db);
return true;
}
QString QHelpDBReader::databaseName() const
{
return m_dbName;
}
QString QHelpDBReader::errorMessage() const
{
return m_error;
}
QString QHelpDBReader::namespaceName() const
{
if (!m_namespace.isEmpty())
return m_namespace;
if (m_query) {
m_query->exec(QLatin1String("SELECT Name FROM NamespaceTable"));
if (m_query->next())
m_namespace = m_query->value(0).toString();
}
return m_namespace;
}
QString QHelpDBReader::virtualFolder() const
{
if (m_query) {
m_query->exec(QLatin1String("SELECT Name FROM FolderTable WHERE Id=1"));
if (m_query->next())
return m_query->value(0).toString();
}
return QString();
}
QList<QStringList> QHelpDBReader::filterAttributeSets() const
{
QList<QStringList> result;
if (m_query) {
m_query->exec(QLatin1String("SELECT a.Id, b.Name FROM FileAttributeSetTable a, "
"FilterAttributeTable b WHERE a.FilterAttributeId=b.Id ORDER BY a.Id"));
int oldId = -1;
while (m_query->next()) {
int id = m_query->value(0).toInt();
if (id != oldId) {
result.append(QStringList());
oldId = id;
}
result.last().append(m_query->value(1).toString());
}
}
return result;
}
bool QHelpDBReader::fileExists(const QString &virtualFolder,
const QString &filePath,
const QStringList &filterAttributes) const
{
if (virtualFolder.isEmpty() || filePath.isEmpty() || !m_query)
return false;
//SELECT COUNT(a.Name) FROM FileNameTable a, FolderTable b, FileFilterTable c, FilterAttributeTable d WHERE a.FolderId=b.Id AND b.Name='qtdoc' AND a.Name='qstring.html' AND a.FileId=c.FileId AND c.FilterAttributeId=d.Id AND d.Name='qtrefdoc'
QString query;
namespaceName();
if (filterAttributes.isEmpty()) {
query = QString(QLatin1String("SELECT COUNT(a.Name) FROM FileNameTable a, FolderTable b "
"WHERE a.FolderId=b.Id AND b.Name=\'%1\' AND a.Name=\'%2\'")).arg(quote(virtualFolder)).arg(quote(filePath));
} else {
query = QString(QLatin1String("SELECT COUNT(a.Name) FROM FileNameTable a, FolderTable b, "
"FileFilterTable c, FilterAttributeTable d WHERE a.FolderId=b.Id "
"AND b.Name=\'%1\' AND a.Name=\'%2\' AND a.FileId=c.FileId AND "
"c.FilterAttributeId=d.Id AND d.Name=\'%3\'"))
.arg(quote(virtualFolder)).arg(quote(filePath))
.arg(quote(filterAttributes.first()));
for (int i=1; i<filterAttributes.count(); ++i) {
query.append(QString(QLatin1String(" INTERSECT SELECT COUNT(a.Name) FROM FileNameTable a, "
"FolderTable b, FileFilterTable c, FilterAttributeTable d WHERE a.FolderId=b.Id "
"AND b.Name=\'%1\' AND a.Name=\'%2\' AND a.FileId=c.FileId AND "
"c.FilterAttributeId=d.Id AND d.Name=\'%3\'"))
.arg(quote(virtualFolder)).arg(quote(filePath))
.arg(quote(filterAttributes.at(i))));
}
}
m_query->exec(query);
if (m_query->next() && m_query->isValid() && m_query->value(0).toInt())
return true;
return false;
}
QByteArray QHelpDBReader::fileData(const QString &virtualFolder,
const QString &filePath) const
{
QByteArray ba;
if (virtualFolder.isEmpty() || filePath.isEmpty() || !m_query)
return ba;
namespaceName();
m_query->prepare(QLatin1String("SELECT a.Data FROM FileDataTable a, FileNameTable b, FolderTable c, "
"NamespaceTable d WHERE a.Id=b.FileId AND (b.Name=? OR b.Name=?) AND b.FolderId=c.Id "
"AND c.Name=? AND c.NamespaceId=d.Id AND d.Name=?"));
m_query->bindValue(0, filePath);
m_query->bindValue(1, QString(QLatin1String("./") + filePath));
m_query->bindValue(2, virtualFolder);
m_query->bindValue(3, m_namespace);
m_query->exec();
if (m_query->next() && m_query->isValid())
ba = qUncompress(m_query->value(0).toByteArray());
return ba;
}
QStringList QHelpDBReader::customFilters() const
{
QStringList lst;
if (m_query) {
m_query->exec(QLatin1String("SELECT Name FROM FilterNameTable"));
while (m_query->next())
lst.append(m_query->value(0).toString());
}
return lst;
}
QStringList QHelpDBReader::filterAttributes(const QString &filterName) const
{
QStringList lst;
if (m_query) {
if (filterName.isEmpty()) {
m_query->prepare(QLatin1String("SELECT Name FROM FilterAttributeTable"));
} else {
m_query->prepare(QLatin1String("SELECT a.Name FROM FilterAttributeTable a, "
"FilterTable b, FilterNameTable c WHERE c.Name=? "
"AND c.Id=b.NameId AND b.FilterAttributeId=a.Id"));
m_query->bindValue(0, filterName);
}
m_query->exec();
while (m_query->next())
lst.append(m_query->value(0).toString());
}
return lst;
}
QStringList QHelpDBReader::indicesForFilter(const QStringList &filterAttributes) const
{
QStringList indices;
if (!m_query)
return indices;
//SELECT DISTINCT a.Name FROM IndexTable a, IndexFilterTable b, FilterAttributeTable c WHERE a.Id=b.IndexId AND b.FilterAttributeId=c.Id AND c.Name in ('4.2.3', 'qt')
QString query;
if (filterAttributes.isEmpty()) {
query = QLatin1String("SELECT DISTINCT Name FROM IndexTable");
} else {
query = QString(QLatin1String("SELECT DISTINCT a.Name FROM IndexTable a, "
"IndexFilterTable b, FilterAttributeTable c WHERE a.Id=b.IndexId "
"AND b.FilterAttributeId=c.Id AND c.Name='%1'")).arg(quote(filterAttributes.first()));
for (int i=1; i<filterAttributes.count(); ++i) {
query.append(QString(QLatin1String(" INTERSECT SELECT DISTINCT a.Name FROM IndexTable a, "
"IndexFilterTable b, FilterAttributeTable c WHERE a.Id=b.IndexId "
"AND b.FilterAttributeId=c.Id AND c.Name='%1'"))
.arg(quote(filterAttributes.at(i))));
}
}
m_query->exec(query);
while (m_query->next()) {
if (!m_query->value(0).toString().isEmpty())
indices.append(m_query->value(0).toString());
}
return indices;
}
void QHelpDBReader::linksForKeyword(const QString &keyword, const QStringList &filterAttributes,
QMap<QString, QUrl> &linkMap) const
{
if (!m_query)
return;
QString query;
if (filterAttributes.isEmpty()) {
query = QString(QLatin1String("SELECT d.Title, f.Name, e.Name, d.Name, a.Anchor "
"FROM IndexTable a, FileNameTable d, "
"FolderTable e, NamespaceTable f WHERE "
"a.FileId=d.FileId AND d.FolderId=e.Id AND a.NamespaceId=f.Id "
"AND a.Name='%1'")).arg(quote(keyword));
} else if (m_useAttributesCache) {
query = QString(QLatin1String("SELECT d.Title, f.Name, e.Name, d.Name, a.Anchor, a.Id "
"FROM IndexTable a, "
"FileNameTable d, FolderTable e, NamespaceTable f WHERE "
"a.FileId=d.FileId AND d.FolderId=e.Id "
"AND a.NamespaceId=f.Id AND a.Name='%1'"))
.arg(quote(keyword));
m_query->exec(query);
while (m_query->next()) {
if (m_indicesCache.contains(m_query->value(5).toInt())) {
linkMap.insertMulti(m_query->value(0).toString(), buildQUrl(m_query->value(1).toString(),
m_query->value(2).toString(), m_query->value(3).toString(),
m_query->value(4).toString()));
}
}
return;
} else {
query = QString(QLatin1String("SELECT d.Title, f.Name, e.Name, d.Name, a.Anchor "
"FROM IndexTable a, IndexFilterTable b, FilterAttributeTable c, "
"FileNameTable d, FolderTable e, NamespaceTable f "
"WHERE a.FileId=d.FileId AND d.FolderId=e.Id "
"AND a.NamespaceId=f.Id AND b.IndexId=a.Id AND b.FilterAttributeId=c.Id "
"AND a.Name='%1' AND c.Name='%2'")).arg(quote(keyword))
.arg(quote(filterAttributes.first()));
for (int i=1; i<filterAttributes.count(); ++i) {
query.append(QString(QLatin1String(" INTERSECT SELECT d.Title, f.Name, e.Name, d.Name, a.Anchor "
"FROM IndexTable a, IndexFilterTable b, FilterAttributeTable c, "
"FileNameTable d, FolderTable e, NamespaceTable f "
"WHERE a.FileId=d.FileId AND d.FolderId=e.Id "
"AND a.NamespaceId=f.Id AND b.IndexId=a.Id AND b.FilterAttributeId=c.Id "
"AND a.Name='%1' AND c.Name='%2'")).arg(quote(keyword))
.arg(quote(filterAttributes.at(i))));
}
}
QString title;
m_query->exec(query);
while (m_query->next()) {
title = m_query->value(0).toString();
if (title.isEmpty()) // generate a title + corresponding path
title = keyword + QLatin1String(" : ") + m_query->value(3).toString();
linkMap.insertMulti(title, buildQUrl(m_query->value(1).toString(),
m_query->value(2).toString(), m_query->value(3).toString(),
m_query->value(4).toString()));
}
}
void QHelpDBReader::linksForIdentifier(const QString &id,
const QStringList &filterAttributes,
QMap<QString, QUrl> &linkMap) const
{
if (!m_query)
return;
QString query;
if (filterAttributes.isEmpty()) {
query = QString(QLatin1String("SELECT d.Title, f.Name, e.Name, d.Name, a.Anchor "
"FROM IndexTable a, FileNameTable d, FolderTable e, "
"NamespaceTable f WHERE a.FileId=d.FileId AND "
"d.FolderId=e.Id AND a.NamespaceId=f.Id AND a.Identifier='%1'"))
.arg(quote(id));
} else if (m_useAttributesCache) {
query = QString(QLatin1String("SELECT d.Title, f.Name, e.Name, d.Name, a.Anchor, a.Id "
"FROM IndexTable a,"
"FileNameTable d, FolderTable e, NamespaceTable f WHERE "
"a.FileId=d.FileId AND d.FolderId=e.Id "
"AND a.NamespaceId=f.Id AND a.Identifier='%1'"))
.arg(quote(id));
m_query->exec(query);
while (m_query->next()) {
if (m_indicesCache.contains(m_query->value(5).toInt())) {
linkMap.insertMulti(m_query->value(0).toString(), buildQUrl(m_query->value(1).toString(),
m_query->value(2).toString(), m_query->value(3).toString(),
m_query->value(4).toString()));
}
}
return;
} else {
query = QString(QLatin1String("SELECT d.Title, f.Name, e.Name, d.Name, a.Anchor "
"FROM IndexTable a, IndexFilterTable b, FilterAttributeTable c, "
"FileNameTable d, FolderTable e, NamespaceTable f "
"WHERE a.FileId=d.FileId AND d.FolderId=e.Id "
"AND a.NamespaceId=f.Id AND b.IndexId=a.Id AND b.FilterAttributeId=c.Id "
"AND a.Identifier='%1' AND c.Name='%2'")).arg(quote(id))
.arg(quote(filterAttributes.first()));
for (int i=0; i<filterAttributes.count(); ++i) {
query.append(QString(QLatin1String(" INTERSECT SELECT d.Title, f.Name, e.Name, "
"d.Name, a.Anchor FROM IndexTable a, IndexFilterTable b, "
"FilterAttributeTable c, FileNameTable d, "
"FolderTable e, NamespaceTable f WHERE "
"a.FileId=d.FileId AND d.FolderId=e.Id AND a.NamespaceId=f.Id "
"AND b.IndexId=a.Id AND b.FilterAttributeId=c.Id AND "
"a.Identifier='%1' AND c.Name='%2'")).arg(quote(id))
.arg(quote(filterAttributes.at(i))));
}
}
m_query->exec(query);
while (m_query->next()) {
linkMap.insertMulti(m_query->value(0).toString(), buildQUrl(m_query->value(1).toString(),
m_query->value(2).toString(), m_query->value(3).toString(),
m_query->value(4).toString()));
}
}
QUrl QHelpDBReader::buildQUrl(const QString &ns, const QString &folder,
const QString &relFileName, const QString &anchor) const
{
QUrl url;
url.setScheme(QLatin1String("qthelp"));
url.setAuthority(ns);
url.setPath(QLatin1Char('/') + folder + QLatin1Char('/') + relFileName);
url.setFragment(anchor);
return url;
}
QList<QByteArray> QHelpDBReader::contentsForFilter(const QStringList &filterAttributes) const
{
QList<QByteArray> contents;
if (!m_query)
return contents;
//SELECT DISTINCT a.Data FROM ContentsTable a, ContentsFilterTable b, FilterAttributeTable c WHERE a.Id=b.ContentsId AND b.FilterAttributeId=c.Id AND c.Name='qt' INTERSECT SELECT DISTINCT a.Data FROM ContentsTable a, ContentsFilterTable b, FilterAttributeTable c WHERE a.Id=b.ContentsId AND b.FilterAttributeId=c.Id AND c.Name='3.3.8';
QString query;
if (filterAttributes.isEmpty()) {
query = QLatin1String("SELECT Data from ContentsTable");
} else {
query = QString(QLatin1String("SELECT a.Data FROM ContentsTable a, "
"ContentsFilterTable b, FilterAttributeTable c "
"WHERE a.Id=b.ContentsId AND b.FilterAttributeId=c.Id "
"AND c.Name='%1'")).arg(quote(filterAttributes.first()));
for (int i=1; i<filterAttributes.count(); ++i) {
query.append(QString(QLatin1String(" INTERSECT SELECT a.Data FROM ContentsTable a, "
"ContentsFilterTable b, FilterAttributeTable c "
"WHERE a.Id=b.ContentsId AND b.FilterAttributeId=c.Id "
"AND c.Name='%1'")).arg(quote(filterAttributes.at(i))));
}
}
m_query->exec(query);
while (m_query->next()) {
contents.append(m_query->value(0).toByteArray());
}
return contents;
}
QUrl QHelpDBReader::urlOfPath(const QString &relativePath) const
{
QUrl url;
if (!m_query)
return url;
m_query->exec(QLatin1String("SELECT a.Name, b.Name FROM NamespaceTable a, "
"FolderTable b WHERE a.id=b.NamespaceId and a.Id=1"));
if (m_query->next()) {
QString rp = relativePath;
QString anchor;
int i = rp.indexOf(QLatin1Char('#'));
if (i > -1) {
rp = relativePath.left(i);
anchor = relativePath.mid(i+1);
}
url = buildQUrl(m_query->value(0).toString(),
m_query->value(1).toString(), rp, anchor);
}
return url;
}
QStringList QHelpDBReader::files(const QStringList &filterAttributes,
const QString &extensionFilter) const
{
QStringList lst;
if (!m_query)
return lst;
QString query;
QString extension;
if (!extensionFilter.isEmpty())
extension = QString(QLatin1String("AND b.Name like \'%.%1\'")).arg(extensionFilter);
if (filterAttributes.isEmpty()) {
query = QString(QLatin1String("SELECT a.Name, b.Name FROM FolderTable a, "
"FileNameTable b WHERE b.FolderId=a.Id %1"))
.arg(extension);
} else {
query = QString(QLatin1String("SELECT a.Name, b.Name FROM FolderTable a, "
"FileNameTable b, FileFilterTable c, FilterAttributeTable d "
"WHERE b.FolderId=a.Id AND b.FileId=c.FileId "
"AND c.FilterAttributeId=d.Id AND d.Name=\'%1\' %2"))
.arg(quote(filterAttributes.first())).arg(extension);
for (int i=1; i<filterAttributes.count(); ++i) {
query.append(QString(QLatin1String(" INTERSECT SELECT a.Name, b.Name FROM "
"FolderTable a, FileNameTable b, FileFilterTable c, "
"FilterAttributeTable d WHERE b.FolderId=a.Id AND "
"b.FileId=c.FileId AND c.FilterAttributeId=d.Id AND "
"d.Name=\'%1\' %2")).arg(quote(filterAttributes.at(i)))
.arg(extension));
}
}
m_query->exec(query);
while (m_query->next()) {
lst.append(m_query->value(0).toString() + QLatin1Char('/')
+ m_query->value(1).toString());
}
return lst;
}
QVariant QHelpDBReader::metaData(const QString &name) const
{
QVariant v;
if (!m_query)
return v;
m_query->prepare(QLatin1String("SELECT COUNT(Value), Value FROM MetaDataTable "
"WHERE Name=?"));
m_query->bindValue(0, name);
if (m_query->exec() && m_query->next()
&& m_query->value(0).toInt() == 1)
v = m_query->value(1);
return v;
}
QString QHelpDBReader::mergeList(const QStringList &list) const
{
QString str;
foreach (const QString &s, list)
str.append(QLatin1Char('\'') + quote(s) + QLatin1String("\', "));
if (str.endsWith(QLatin1String(", ")))
str = str.left(str.length()-2);
return str;
}
QString QHelpDBReader::quote(const QString &string) const
{
QString s = string;
s.replace(QLatin1Char('\''), QLatin1String("\'\'"));
return s;
}
QSet<int> QHelpDBReader::indexIds(const QStringList &attributes) const
{
QSet<int> ids;
if (attributes.isEmpty())
return ids;
QString query = QString(QLatin1String("SELECT a.IndexId FROM IndexFilterTable a, "
"FilterAttributeTable b WHERE a.FilterAttributeId=b.Id "
"AND b.Name='%1'")).arg(attributes.first());
for (int i=0; i<attributes.count(); ++i) {
query.append(QString(QLatin1String(" INTERSECT SELECT a.IndexId FROM "
"IndexFilterTable a, FilterAttributeTable b WHERE "
"a.FilterAttributeId=b.Id AND b.Name='%1'"))
.arg(attributes.at(i)));
}
if (!m_query->exec(query))
return ids;
while (m_query->next())
ids.insert(m_query->value(0).toInt());
return ids;
}
bool QHelpDBReader::createAttributesCache(const QStringList &attributes,
const QSet<int> &indexIds)
{
m_useAttributesCache = false;
if (attributes.count() < 2) {
m_viewAttributes.clear();
return true;
}
bool needUpdate = !m_viewAttributes.count();
foreach (const QString &s, attributes)
m_viewAttributes.remove(s);
if (m_viewAttributes.count() || needUpdate) {
m_viewAttributes.clear();
m_indicesCache = indexIds;
}
foreach (const QString &s, attributes)
m_viewAttributes.insert(s);
m_useAttributesCache = true;
return true;
}
QT_END_NAMESPACE
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