Move indexed db files from content/renderer to content/common.

content/renderer/indexed_db/renderer_webidbcursor_impl.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/renderer/indexed_db/renderer_webidbcursor_impl.h"
-
-#include "content/common/indexed_db/indexed_db_messages.h"
-#include "content/renderer/indexed_db/indexed_db_dispatcher.h"
-#include "content/renderer/render_thread_impl.h"
-
-using WebKit::WebExceptionCode;
-using WebKit::WebIDBCallbacks;
-using WebKit::WebIDBKey;
-using WebKit::WebSerializedScriptValue;
-
-RendererWebIDBCursorImpl::RendererWebIDBCursorImpl(int32 idb_cursor_id)
-    : idb_cursor_id_(idb_cursor_id),
-      continue_count_(0),
-      used_prefetches_(0),
-      pending_onsuccess_callbacks_(0),
-      prefetch_amount_(kMinPrefetchAmount) {
-}
-
-RendererWebIDBCursorImpl::~RendererWebIDBCursorImpl() {
-  // It's not possible for there to be pending callbacks that address this
-  // object since inside WebKit, they hold a reference to the object wich owns
-  // this object. But, if that ever changed, then we'd need to invalidate
-  // any such pointers.
-  ChildThread::current()->Send(new IndexedDBHostMsg_CursorDestroyed(
-      idb_cursor_id_));
-  IndexedDBDispatcher* dispatcher =
-      IndexedDBDispatcher::ThreadSpecificInstance();
-  dispatcher->CursorDestroyed(idb_cursor_id_);
-}
-
-unsigned short RendererWebIDBCursorImpl::direction() const {
-  int direction;
-  ChildThread::current()->Send(
-      new IndexedDBHostMsg_CursorDirection(idb_cursor_id_, &direction));
-  return direction;
-}
-
-WebIDBKey RendererWebIDBCursorImpl::key() const {
-  return key_;
-}
-
-WebIDBKey RendererWebIDBCursorImpl::primaryKey() const {
-  return primary_key_;
-}
-
-WebSerializedScriptValue RendererWebIDBCursorImpl::value() const {
-  return value_;
-}
-
-void RendererWebIDBCursorImpl::update(const WebSerializedScriptValue& value,
-                                      WebIDBCallbacks* callbacks,
-                                      WebExceptionCode& ec) {
-  IndexedDBDispatcher* dispatcher =
-      IndexedDBDispatcher::ThreadSpecificInstance();
-  dispatcher->RequestIDBCursorUpdate(
-      content::SerializedScriptValue(value), callbacks, idb_cursor_id_, &ec);
-}
-
-void RendererWebIDBCursorImpl::continueFunction(const WebIDBKey& key,
-                                                WebIDBCallbacks* callbacks,
-                                                WebExceptionCode& ec) {
-  IndexedDBDispatcher* dispatcher =
-      IndexedDBDispatcher::ThreadSpecificInstance();
-
-  if (key.type() == WebIDBKey::InvalidType) {
-    // No key, so this would qualify for a prefetch.
-    ++continue_count_;
-
-    if (!prefetch_keys_.empty()) {
-      // We have a prefetch cache, so serve the result from that.
-      CachedContinue(callbacks);
-      return;
-    }
-
-    if (continue_count_ > kPrefetchContinueThreshold) {
-      // Request pre-fetch.
-      dispatcher->RequestIDBCursorPrefetch(prefetch_amount_, callbacks,
-                                           idb_cursor_id_, &ec);
-
-      // Increase prefetch_amount_ exponentially.
-      prefetch_amount_ *= 2;
-      if (prefetch_amount_ > kMaxPrefetchAmount)
-        prefetch_amount_ = kMaxPrefetchAmount;
-
-      return;
-    }
-  } else {
-    // Key argument supplied. We couldn't prefetch this.
-    ResetPrefetchCache();
-  }
-
-  dispatcher->RequestIDBCursorContinue(IndexedDBKey(key), callbacks,
-                                       idb_cursor_id_, &ec);
-}
-
-void RendererWebIDBCursorImpl::deleteFunction(WebIDBCallbacks* callbacks,
-                                              WebExceptionCode& ec) {
-  IndexedDBDispatcher* dispatcher =
-      IndexedDBDispatcher::ThreadSpecificInstance();
-  dispatcher->RequestIDBCursorDelete(callbacks, idb_cursor_id_, &ec);
-}
-
-void RendererWebIDBCursorImpl::postSuccessHandlerCallback()
-{
-  pending_onsuccess_callbacks_--;
-
-  // If the onsuccess callback called continue() on the cursor again,
-  // and that continue was served by the prefetch cache, then
-  // pending_onsuccess_callbacks_ would be incremented.
-  // If not, it means the callback did something else, or nothing at all,
-  // in which case we need to reset the cache.
-
-  if (pending_onsuccess_callbacks_ == 0)
-    ResetPrefetchCache();
-}
-
-void RendererWebIDBCursorImpl::SetKeyAndValue(
-    const IndexedDBKey& key,
-    const IndexedDBKey& primary_key,
-    const content::SerializedScriptValue& value) {
-  key_ = key;
-  primary_key_ = primary_key;
-  value_ = value;
-}
-
-void RendererWebIDBCursorImpl::SetPrefetchData(
-    const std::vector<IndexedDBKey>& keys,
-    const std::vector<IndexedDBKey>& primary_keys,
-    const std::vector<content::SerializedScriptValue>& values) {
-  prefetch_keys_.assign(keys.begin(), keys.end());
-  prefetch_primary_keys_.assign(primary_keys.begin(), primary_keys.end());
-  prefetch_values_.assign(values.begin(), values.end());
-
-  used_prefetches_ = 0;
-  pending_onsuccess_callbacks_ = 0;
-}
-
-void RendererWebIDBCursorImpl::CachedContinue(
-    WebKit::WebIDBCallbacks* callbacks) {
-  DCHECK(prefetch_keys_.size() > 0);
-  DCHECK(prefetch_primary_keys_.size() == prefetch_keys_.size());
-  DCHECK(prefetch_values_.size() == prefetch_keys_.size());
-
-  key_ = prefetch_keys_.front();
-  primary_key_ = prefetch_primary_keys_.front();
-  value_ = prefetch_values_.front();
-
-  prefetch_keys_.pop_front();
-  prefetch_primary_keys_.pop_front();
-  prefetch_values_.pop_front();
-  used_prefetches_++;
-
-  pending_onsuccess_callbacks_++;
-  callbacks->onSuccessWithContinuation();
-}
-
-void RendererWebIDBCursorImpl::ResetPrefetchCache() {
-  continue_count_ = 0;
-  prefetch_amount_ = kMinPrefetchAmount;
-
-  if (!prefetch_keys_.size()) {
-    // No prefetch cache, so no need to reset the cursor in the back-end.
-    return;
-  }
-
-  IndexedDBDispatcher* dispatcher =
-      IndexedDBDispatcher::ThreadSpecificInstance();
-  dispatcher->RequestIDBCursorPrefetchReset(used_prefetches_,
-                                            prefetch_keys_.size(),
-                                            idb_cursor_id_);
-  prefetch_keys_.clear();
-  prefetch_primary_keys_.clear();
-  prefetch_values_.clear();
-
-  pending_onsuccess_callbacks_ = 0;
-}