Import Qt5x2 branch of QtWebkit for Qt 5.2

Importing a new snapshot of webkit.

Change-Id: I2d01ad12cdc8af8cb015387641120a9d7ea5f10c
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>

1 files changed, 321 insertions, 0 deletions

diff --git a/Source/WebKit2/UIProcess/Storage/LocalStorageDatabaseTracker.cpp b/Source/WebKit2/UIProcess/Storage/LocalStorageDatabaseTracker.cpp
new file mode 100644
index 000000000..f58fe8a79
--- /dev/null
+++ b/Source/WebKit2/UIProcess/Storage/LocalStorageDatabaseTracker.cpp
@@ -0,0 +1,321 @@
+/*
+ * Copyright (C) 2011, 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "LocalStorageDatabaseTracker.h"
+
+#include "WorkQueue.h"
+#include <WebCore/FileSystem.h>
+#include <WebCore/SQLiteStatement.h>
+#include <WebCore/SecurityOrigin.h>
+#include <wtf/text/CString.h>
+
+using namespace WebCore;
+
+namespace WebKit {
+
+PassRefPtr<LocalStorageDatabaseTracker> LocalStorageDatabaseTracker::create(PassRefPtr<WorkQueue> queue)
+{
+    return adoptRef(new LocalStorageDatabaseTracker(queue));
+}
+
+LocalStorageDatabaseTracker::LocalStorageDatabaseTracker(PassRefPtr<WorkQueue> queue)
+    : m_queue(queue)
+{
+}
+
+LocalStorageDatabaseTracker::~LocalStorageDatabaseTracker()
+{
+}
+
+void LocalStorageDatabaseTracker::setLocalStorageDirectory(const String& localStorageDirectory)
+{
+    // FIXME: We should come up with a better idiom for safely copying strings across threads.
+    RefPtr<StringImpl> copiedLocalStorageDirectory = localStorageDirectory.impl() ? localStorageDirectory.impl()->isolatedCopy() : nullptr;
+
+    m_queue->dispatch(bind(&LocalStorageDatabaseTracker::setLocalStorageDirectoryInternal, this, copiedLocalStorageDirectory.release()));
+}
+
+String LocalStorageDatabaseTracker::databasePath(SecurityOrigin* securityOrigin) const
+{
+    return databasePath(securityOrigin->databaseIdentifier() + ".localstorage");
+}
+
+void LocalStorageDatabaseTracker::didOpenDatabaseWithOrigin(SecurityOrigin* securityOrigin)
+{
+    addDatabaseWithOriginIdentifier(securityOrigin->databaseIdentifier(), databasePath(securityOrigin));
+}
+
+void LocalStorageDatabaseTracker::deleteDatabaseWithOrigin(SecurityOrigin* securityOrigin)
+{
+    removeDatabaseWithOriginIdentifier(securityOrigin->databaseIdentifier());
+}
+
+void LocalStorageDatabaseTracker::deleteAllDatabases()
+{
+    m_origins.clear();
+
+    openTrackerDatabase(SkipIfNonExistent);
+    if (!m_database.isOpen())
+        return;
+
+    SQLiteStatement statement(m_database, "SELECT origin, path FROM Origins");
+    if (statement.prepare() != SQLResultOk) {
+        LOG_ERROR("Failed to prepare statement.");
+        return;
+    }
+
+    int result;
+    while ((result = statement.step()) == SQLResultRow) {
+        deleteFile(statement.getColumnText(1));
+
+        // FIXME: Call out to the client.
+    }
+
+    if (result != SQLResultDone)
+        LOG_ERROR("Failed to read in all origins from the database.");
+
+    if (m_database.isOpen())
+        m_database.close();
+
+    if (!deleteFile(trackerDatabasePath())) {
+        // In the case where it is not possible to delete the database file (e.g some other program
+        // like a virus scanner is accessing it), make sure to remove all entries.
+        openTrackerDatabase(SkipIfNonExistent);
+        if (!m_database.isOpen())
+            return;
+
+        SQLiteStatement deleteStatement(m_database, "DELETE FROM Origins");
+        if (deleteStatement.prepare() != SQLResultOk) {
+            LOG_ERROR("Unable to prepare deletion of all origins");
+            return;
+        }
+        if (!deleteStatement.executeCommand()) {
+            LOG_ERROR("Unable to execute deletion of all origins");
+            return;
+        }
+    }
+
+    deleteEmptyDirectory(m_localStorageDirectory);
+}
+
+Vector<RefPtr<WebCore::SecurityOrigin>> LocalStorageDatabaseTracker::origins() const
+{
+    Vector<RefPtr<SecurityOrigin>> origins;
+    origins.reserveInitialCapacity(m_origins.size());
+
+    for (HashSet<String>::const_iterator it = m_origins.begin(), end = m_origins.end(); it != end; ++it)
+        origins.uncheckedAppend(SecurityOrigin::createFromDatabaseIdentifier(*it));
+
+    return origins;
+}
+
+void LocalStorageDatabaseTracker::setLocalStorageDirectoryInternal(StringImpl* localStorageDirectory)
+{
+    if (m_database.isOpen())
+        m_database.close();
+
+    m_localStorageDirectory = localStorageDirectory;
+    m_origins.clear();
+
+    m_queue->dispatch(bind(&LocalStorageDatabaseTracker::importOriginIdentifiers, this));
+}
+
+String LocalStorageDatabaseTracker::databasePath(const String& filename) const
+{
+    if (!makeAllDirectories(m_localStorageDirectory)) {
+        LOG_ERROR("Unabled to create LocalStorage database path %s", m_localStorageDirectory.utf8().data());
+        return String();
+    }
+
+    return pathByAppendingComponent(m_localStorageDirectory, filename);
+}
+
+String LocalStorageDatabaseTracker::trackerDatabasePath() const
+{
+    return databasePath("StorageTracker.db");
+}
+
+void LocalStorageDatabaseTracker::openTrackerDatabase(DatabaseOpeningStrategy openingStrategy)
+{
+    if (m_database.isOpen())
+        return;
+
+    String databasePath = trackerDatabasePath();
+
+    if (!fileExists(databasePath) && openingStrategy == SkipIfNonExistent)
+        return;
+
+    if (!m_database.open(databasePath)) {
+        LOG_ERROR("Failed to open databasePath %s.", databasePath.ascii().data());
+        return;
+    }
+
+    // Since a WorkQueue isn't bound to a specific thread, we have to disable threading checks
+    // even though we never access the database from different threads simultaneously.
+    m_database.disableThreadingChecks();
+
+    if (m_database.tableExists("Origins"))
+        return;
+
+    if (!m_database.executeCommand("CREATE TABLE Origins (origin TEXT UNIQUE ON CONFLICT REPLACE, path TEXT);"))
+        LOG_ERROR("Failed to create Origins table.");
+}
+
+void LocalStorageDatabaseTracker::importOriginIdentifiers()
+{
+    openTrackerDatabase(SkipIfNonExistent);
+
+    if (m_database.isOpen()) {
+        SQLiteStatement statement(m_database, "SELECT origin FROM Origins");
+        if (statement.prepare() != SQLResultOk) {
+            LOG_ERROR("Failed to prepare statement.");
+            return;
+        }
+
+        int result;
+
+        while ((result = statement.step()) == SQLResultRow)
+            m_origins.add(statement.getColumnText(0));
+
+        if (result != SQLResultDone) {
+            LOG_ERROR("Failed to read in all origins from the database.");
+            return;
+        }
+    }
+
+    updateTrackerDatabaseFromLocalStorageDatabaseFiles();
+}
+
+void LocalStorageDatabaseTracker::updateTrackerDatabaseFromLocalStorageDatabaseFiles()
+{
+    Vector<String> paths = listDirectory(m_localStorageDirectory, "*.localstorage");
+
+    HashSet<String> origins(m_origins);
+    HashSet<String> originsFromLocalStorageDatabaseFiles;
+
+    for (size_t i = 0; i < paths.size(); ++i) {
+        const String& path = paths[i];
+
+        if (!path.endsWith(".localstorage"))
+            continue;
+
+        String filename = pathGetFileName(path);
+
+        String originIdentifier = filename.substring(0, filename.length() - strlen(".localstorage"));
+
+        if (!m_origins.contains(originIdentifier))
+            addDatabaseWithOriginIdentifier(originIdentifier, path);
+
+        originsFromLocalStorageDatabaseFiles.add(originIdentifier);
+    }
+
+    for (auto it = origins.begin(), end = origins.end(); it != end; ++it) {
+        const String& originIdentifier = *it;
+        if (origins.contains(originIdentifier))
+            continue;
+
+        removeDatabaseWithOriginIdentifier(originIdentifier);
+    }
+}
+
+void LocalStorageDatabaseTracker::addDatabaseWithOriginIdentifier(const String& originIdentifier, const String& databasePath)
+{
+    openTrackerDatabase(CreateIfNonExistent);
+    if (!m_database.isOpen())
+        return;
+
+    SQLiteStatement statement(m_database, "INSERT INTO Origins VALUES (?, ?)");
+    if (statement.prepare() != SQLResultOk) {
+        LOG_ERROR("Unable to establish origin '%s' in the tracker", originIdentifier.utf8().data());
+        return;
+    }
+
+    statement.bindText(1, originIdentifier);
+    statement.bindText(2, databasePath);
+
+    if (statement.step() != SQLResultDone)
+        LOG_ERROR("Unable to establish origin '%s' in the tracker", originIdentifier.utf8().data());
+
+    m_origins.add(originIdentifier);
+
+    // FIXME: Tell clients that the origin was added.
+}
+
+void LocalStorageDatabaseTracker::removeDatabaseWithOriginIdentifier(const String& originIdentifier)
+{
+    openTrackerDatabase(SkipIfNonExistent);
+    if (!m_database.isOpen())
+        return;
+
+    String path = pathForDatabaseWithOriginIdentifier(originIdentifier);
+    if (path.isEmpty())
+        return;
+
+    SQLiteStatement deleteStatement(m_database, "DELETE FROM Origins where origin=?");
+    if (deleteStatement.prepare() != SQLResultOk) {
+        LOG_ERROR("Unable to prepare deletion of origin '%s'", originIdentifier.ascii().data());
+        return;
+    }
+    deleteStatement.bindText(1, originIdentifier);
+    if (!deleteStatement.executeCommand()) {
+        LOG_ERROR("Unable to execute deletion of origin '%s'", originIdentifier.ascii().data());
+        return;
+    }
+
+    deleteFile(path);
+
+    m_origins.remove(originIdentifier);
+    if (m_origins.isEmpty()) {
+        // There are no origins left, go ahead and delete the tracker database.
+        m_database.close();
+        deleteFile(trackerDatabasePath());
+        deleteEmptyDirectory(m_localStorageDirectory);
+    }
+
+    // FIXME: Tell clients that the origin was removed.
+}
+
+String LocalStorageDatabaseTracker::pathForDatabaseWithOriginIdentifier(const String& originIdentifier)
+{
+    if (!m_database.isOpen())
+        return String();
+
+    SQLiteStatement pathStatement(m_database, "SELECT path FROM Origins WHERE origin=?");
+    if (pathStatement.prepare() != SQLResultOk) {
+        LOG_ERROR("Unable to prepare selection of path for origin '%s'", originIdentifier.utf8().data());
+        return String();
+    }
+
+    pathStatement.bindText(1, originIdentifier);
+
+    int result = pathStatement.step();
+    if (result != SQLResultRow)
+        return String();
+
+    return pathStatement.getColumnText(0);
+}
+
+} // namespace WebKit