1 files changed, 199 insertions, 0 deletions
diff --git a/Source/WebCore/storage/IDBCursorBackendImpl.cpp b/Source/WebCore/storage/IDBCursorBackendImpl.cpp
new file mode 100644
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+++ b/Source/WebCore/storage/IDBCursorBackendImpl.cpp
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+/*
+ * Copyright (C) 2010 Google 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 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 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 "IDBCursorBackendImpl.h"
+
+#if ENABLE(INDEXED_DATABASE)
+
+#include "CrossThreadTask.h"
+#include "IDBCallbacks.h"
+#include "IDBDatabaseBackendImpl.h"
+#include "IDBDatabaseError.h"
+#include "IDBDatabaseException.h"
+#include "IDBIndexBackendImpl.h"
+#include "IDBKeyRange.h"
+#include "IDBObjectStoreBackendImpl.h"
+#include "IDBRequest.h"
+#include "IDBSQLiteDatabase.h"
+#include "IDBTransactionBackendInterface.h"
+#include "SQLiteDatabase.h"
+#include "SQLiteStatement.h"
+#include "SerializedScriptValue.h"
+
+namespace WebCore {
+
+IDBCursorBackendImpl::IDBCursorBackendImpl(IDBSQLiteDatabase* database, PassRefPtr<IDBKeyRange> keyRange, IDBCursor::Direction direction, PassOwnPtr<SQLiteStatement> query, bool isSerializedScriptValueCursor, IDBTransactionBackendInterface* transaction, IDBObjectStoreBackendInterface* objectStore)
+    : m_database(database)
+    , m_keyRange(keyRange)
+    , m_direction(direction)
+    , m_query(query)
+    , m_isSerializedScriptValueCursor(isSerializedScriptValueCursor)
+    , m_transaction(transaction)
+    , m_objectStore(objectStore)
+{
+    loadCurrentRow();
+}
+
+IDBCursorBackendImpl::~IDBCursorBackendImpl()
+{
+}
+
+unsigned short IDBCursorBackendImpl::direction() const
+{
+    return m_direction;
+}
+
+PassRefPtr<IDBKey> IDBCursorBackendImpl::key() const
+{
+    
+    return m_currentKey;
+}
+
+PassRefPtr<IDBAny> IDBCursorBackendImpl::value() const
+{
+    if (m_isSerializedScriptValueCursor)
+        return IDBAny::create(m_currentSerializedScriptValue.get());
+    return IDBAny::create(m_currentIDBKeyValue.get());
+}
+
+void IDBCursorBackendImpl::update(PassRefPtr<SerializedScriptValue> prpValue, PassRefPtr<IDBCallbacks> prpCallbacks, ExceptionCode& ec)
+{
+    RefPtr<IDBCursorBackendImpl> cursor = this;
+    RefPtr<SerializedScriptValue> value = prpValue;
+    RefPtr<IDBCallbacks> callbacks = prpCallbacks;
+    // FIXME: Throw DATA_ERR and SERIAL_ERR when appropriate.
+    if (!m_transaction->scheduleTask(createCallbackTask(&IDBCursorBackendImpl::updateInternal, cursor, value, callbacks)))
+        ec = IDBDatabaseException::NOT_ALLOWED_ERR;
+}
+
+void IDBCursorBackendImpl::updateInternal(ScriptExecutionContext*, PassRefPtr<IDBCursorBackendImpl> cursor, PassRefPtr<SerializedScriptValue> prpValue, PassRefPtr<IDBCallbacks> callbacks)
+{
+    // FIXME: This method doesn't update indexes. It's dangerous to call in its current state.
+    callbacks->onError(IDBDatabaseError::create(IDBDatabaseException::UNKNOWN_ERR, "Not implemented."));
+    return;
+
+    RefPtr<SerializedScriptValue> value = prpValue;
+
+    if (!cursor->m_query || cursor->m_currentId == InvalidId) {
+        // FIXME: Use the proper error code when it's specced.
+        callbacks->onError(IDBDatabaseError::create(IDBDatabaseException::UNKNOWN_ERR, "Operation not possible."));
+        return;
+    }
+
+    String sql = "UPDATE ObjectStoreData SET value = ? WHERE id = ?";
+    SQLiteStatement updateQuery(cursor->database(), sql);
+    
+    bool ok = updateQuery.prepare() == SQLResultOk;
+    ASSERT_UNUSED(ok, ok); // FIXME: Better error handling.
+    updateQuery.bindText(1, value->toWireString());
+    updateQuery.bindInt64(2, cursor->m_currentId);
+    ok = updateQuery.step() == SQLResultDone;
+    ASSERT_UNUSED(ok, ok); // FIXME: Better error handling.
+
+    if (cursor->m_isSerializedScriptValueCursor)
+        cursor->m_currentSerializedScriptValue = value.release();
+    callbacks->onSuccess();
+}
+
+void IDBCursorBackendImpl::continueFunction(PassRefPtr<IDBKey> prpKey, PassRefPtr<IDBCallbacks> prpCallbacks, ExceptionCode& ec)
+{
+    RefPtr<IDBCursorBackendImpl> cursor = this;
+    RefPtr<IDBKey> key = prpKey;
+    RefPtr<IDBCallbacks> callbacks = prpCallbacks;
+    if (!m_transaction->scheduleTask(createCallbackTask(&IDBCursorBackendImpl::continueFunctionInternal, cursor, key, callbacks)))
+        ec = IDBDatabaseException::NOT_ALLOWED_ERR;
+}
+
+void IDBCursorBackendImpl::continueFunctionInternal(ScriptExecutionContext*, PassRefPtr<IDBCursorBackendImpl> prpCursor, PassRefPtr<IDBKey> prpKey, PassRefPtr<IDBCallbacks> callbacks)
+{
+    RefPtr<IDBCursorBackendImpl> cursor = prpCursor;
+    RefPtr<IDBKey> key = prpKey;
+    while (true) {
+        if (!cursor->m_query || cursor->m_query->step() != SQLResultRow) {
+            cursor->m_query = 0;
+            cursor->m_currentId = InvalidId;
+            cursor->m_currentKey = 0;
+            cursor->m_currentSerializedScriptValue = 0;
+            cursor->m_currentIDBKeyValue = 0;
+            callbacks->onSuccess();
+            return;
+        }
+
+        RefPtr<IDBKey> oldKey = cursor->m_currentKey;
+        cursor->loadCurrentRow();
+
+        // If a key was supplied, we must loop until we find that key (or hit the end).
+        if (key && !key->isEqual(cursor->m_currentKey.get()))
+            continue;
+
+        // If we don't have a uniqueness constraint, we can stop now.
+        if (cursor->m_direction == IDBCursor::NEXT || cursor->m_direction == IDBCursor::PREV)
+            break;
+        if (!cursor->m_currentKey->isEqual(oldKey.get()))
+            break;
+    }
+
+    callbacks->onSuccess(cursor.get());
+}
+
+void IDBCursorBackendImpl::deleteFunction(PassRefPtr<IDBCallbacks> prpCallbacks, ExceptionCode& ec)
+{
+    if (!m_query || m_currentId == InvalidId || !m_isSerializedScriptValueCursor) {
+        ec = IDBDatabaseException::NOT_ALLOWED_ERR;
+        return;
+    }
+
+    // FIXME: Check that the transaction is READ_WRITE
+    // if (m_transaction->mode() == IDBTransaction::READ_ONLY) {
+        // FIXME: We must return READ_ONLY_ERR here. Fix this when we update IDBDatabaseException to match the spec.
+        // ec = IDBDatabaseException::NOT_ALLOWED_ERR;
+        // return;
+    // }
+    RefPtr<IDBKey> key = m_currentIDBKeyValue ? m_currentIDBKeyValue : m_currentKey;
+    m_objectStore->deleteFunction(key.release(), prpCallbacks, m_transaction.get(), ec);
+}
+
+
+void IDBCursorBackendImpl::loadCurrentRow()
+{
+    // The column numbers depend on the query in IDBObjectStoreBackendImpl::openCursorInternal or
+    // IDBIndexBackendImpl::openCursorInternal.
+    m_currentId = m_query->getColumnInt64(0);
+    m_currentKey = IDBKey::fromQuery(*m_query, 1);
+    if (m_isSerializedScriptValueCursor)
+        m_currentSerializedScriptValue = SerializedScriptValue::createFromWire(m_query->getColumnText(4));
+
+    m_currentIDBKeyValue = IDBKey::fromQuery(*m_query, 5);
+}
+
+SQLiteDatabase& IDBCursorBackendImpl::database() const
+{
+    return m_database->db();
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(INDEXED_DATABASE)