Componentize visitedlinks to src/components/visitedlink

chrome/renderer/visitedlink_slave.cc

-// Copyright (c) 2006-2008 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 "chrome/renderer/visitedlink_slave.h"
-
-#include "base/logging.h"
-#include "base/shared_memory.h"
-#include "chrome/common/render_messages.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
-
-using WebKit::WebView;
-
-VisitedLinkSlave::VisitedLinkSlave() : shared_memory_(NULL) {
-}
-
-VisitedLinkSlave::~VisitedLinkSlave() {
-  FreeTable();
-}
-
-bool VisitedLinkSlave::OnControlMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(VisitedLinkSlave, message)
-    IPC_MESSAGE_HANDLER(ChromeViewMsg_VisitedLink_NewTable,
-                        OnUpdateVisitedLinks)
-    IPC_MESSAGE_HANDLER(ChromeViewMsg_VisitedLink_Add, OnAddVisitedLinks)
-    IPC_MESSAGE_HANDLER(ChromeViewMsg_VisitedLink_Reset, OnResetVisitedLinks)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-// This function's job is to initialize the table with the given
-// shared memory handle. This memory is mapped into the process.
-void VisitedLinkSlave::OnUpdateVisitedLinks(base::SharedMemoryHandle table) {
-  DCHECK(base::SharedMemory::IsHandleValid(table)) << "Bad table handle";
-  // since this function may be called again to change the table, we may need
-  // to free old objects
-  FreeTable();
-  DCHECK(shared_memory_ == NULL && hash_table_ == NULL);
-
-  // create the shared memory object
-  shared_memory_ = new base::SharedMemory(table, true);
-  if (!shared_memory_)
-    return;
-
-  // map the header into our process so we can see how long the rest is,
-  // and set the salt
-  if (!shared_memory_->Map(sizeof(SharedHeader)))
-    return;
-  SharedHeader* header =
-    static_cast<SharedHeader*>(shared_memory_->memory());
-  DCHECK(header);
-  int32 table_len = header->length;
-  memcpy(salt_, header->salt, sizeof(salt_));
-  shared_memory_->Unmap();
-
-  // now do the whole table because we know the length
-  if (!shared_memory_->Map(sizeof(SharedHeader) +
-                          table_len * sizeof(Fingerprint))) {
-    shared_memory_->Close();
-    return;
-  }
-
-  // commit the data
-  DCHECK(shared_memory_->memory());
-  hash_table_ = reinterpret_cast<Fingerprint*>(
-      static_cast<char*>(shared_memory_->memory()) + sizeof(SharedHeader));
-  table_length_ = table_len;
-}
-
-void VisitedLinkSlave::OnAddVisitedLinks(
-    const VisitedLinkSlave::Fingerprints& fingerprints) {
-  for (size_t i = 0; i < fingerprints.size(); ++i)
-    WebView::updateVisitedLinkState(fingerprints[i]);
-}
-
-void VisitedLinkSlave::OnResetVisitedLinks() {
-  WebView::resetVisitedLinkState();
-}
-
-void VisitedLinkSlave::FreeTable() {
-  if (shared_memory_) {
-    delete shared_memory_;
-    shared_memory_ = NULL;
-  }
-  hash_table_ = NULL;
-  table_length_ = 0;
-}