[Navigation Experiment] Add WKBasedNavigationManagerImpl.

ios/web/navigation/wk_based_navigation_manager_impl.mm

Index: ios/web/navigation/wk_based_navigation_manager_impl.mm
diff --git a/ios/web/navigation/wk_based_navigation_manager_impl.mm b/ios/web/navigation/wk_based_navigation_manager_impl.mm
new file mode 100644
index 0000000000000000000000000000000000000000..d682b152f8c9049bb01f159aec4534d437e462fe
--- /dev/null
+++ b/ios/web/navigation/wk_based_navigation_manager_impl.mm
@@ -0,0 +1,268 @@
+// Copyright 2017 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.
+
+#import "ios/web/navigation/wk_based_navigation_manager_impl.h"
+
+#include <memory>
+
+#include "base/logging.h"
+#include "base/memory/ptr_util.h"
+#import "ios/web/navigation/navigation_item_impl.h"
+#import "ios/web/navigation/navigation_manager_delegate.h"
+#include "ios/web/public/load_committed_details.h"
+#import "ios/web/public/navigation_item.h"
+#import "ios/web/public/web_client.h"
+#import "ios/web/web_state/ui/crw_web_view_navigation_proxy.h"
+#import "net/base/mac/url_conversions.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@class CRWSessionController;
+
+namespace web {
+
+WKBasedNavigationManagerImpl::WKBasedNavigationManagerImpl()
+    : delegate_(nullptr), browser_state_(nullptr) {}
+
+WKBasedNavigationManagerImpl::~WKBasedNavigationManagerImpl() = default;
+
+void WKBasedNavigationManagerImpl::SetDelegate(
+    NavigationManagerDelegate* delegate) {
+  delegate_ = delegate;
+}
+
+void WKBasedNavigationManagerImpl::SetBrowserState(
+    BrowserState* browser_state) {
+  browser_state_ = browser_state;
+}
+
+void WKBasedNavigationManagerImpl::SetSessionController(
+    CRWSessionController* session_controller) {}
+
+void WKBasedNavigationManagerImpl::InitializeSession() {}
+
+void WKBasedNavigationManagerImpl::ReplaceSessionHistory(
+    std::vector<std::unique_ptr<NavigationItem>> items,
+    int current_index) {
+  DLOG(WARNING) << "Not yet implemented.";
+}
+
+void WKBasedNavigationManagerImpl::OnNavigationItemsPruned(
+    size_t pruned_item_count) {
+  delegate_->OnNavigationItemsPruned(pruned_item_count);
+}
+
+void WKBasedNavigationManagerImpl::OnNavigationItemChanged() {
+  delegate_->OnNavigationItemChanged();
+}
+
+void WKBasedNavigationManagerImpl::OnNavigationItemCommitted() {
+  LoadCommittedDetails details;
+  details.item = GetLastCommittedItem();
+  DCHECK(details.item);
+  details.previous_item_index = GetPreviousItemIndex();
+  if (details.previous_item_index >= 0) {
+    NavigationItem* previous_item = GetItemAtIndex(details.previous_item_index);
+    DCHECK(previous_item);
+    details.previous_url = previous_item->GetURL();
+    details.is_in_page = AreUrlsFragmentChangeNavigation(
+        details.previous_url, details.item->GetURL());
+  } else {
+    details.previous_url = GURL();
+    details.is_in_page = NO;
+  }
+
+  delegate_->OnNavigationItemCommitted(details);
+}
+
+CRWSessionController* WKBasedNavigationManagerImpl::GetSessionController()
+    const {
+  return nil;
+}
+
+void WKBasedNavigationManagerImpl::AddTransientItem(const GURL& url) {
+  DLOG(WARNING) << "Not yet implemented.";
+}
+
+void WKBasedNavigationManagerImpl::AddPendingItem(
+    const GURL& url,
+    const web::Referrer& referrer,
+    ui::PageTransition navigation_type,
+    NavigationInitiationType initiation_type,
+    UserAgentOverrideOption user_agent_override_option) {
+  DLOG(WARNING) << "Not yet implemented.";
+}
+
+void WKBasedNavigationManagerImpl::CommitPendingItem() {
+  DLOG(WARNING) << "Not yet implemented.";
+}
+
+int WKBasedNavigationManagerImpl::GetIndexForOffset(int offset) const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return -1;
+}
+
+BrowserState* WKBasedNavigationManagerImpl::GetBrowserState() const {
+  return browser_state_;
+}
+
+WebState* WKBasedNavigationManagerImpl::GetWebState() const {
+  return delegate_->GetWebState();
+}
+
+NavigationItem* WKBasedNavigationManagerImpl::GetVisibleItem() const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return nullptr;
+}
+
+NavigationItem* WKBasedNavigationManagerImpl::GetLastCommittedItem() const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return nullptr;
+}
+
+NavigationItem* WKBasedNavigationManagerImpl::GetPendingItem() const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return nullptr;
+}
+
+NavigationItem* WKBasedNavigationManagerImpl::GetTransientItem() const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return nullptr;
+}
+
+void WKBasedNavigationManagerImpl::DiscardNonCommittedItems() {
+  DLOG(WARNING) << "Not yet implemented.";
+}
+
+void WKBasedNavigationManagerImpl::LoadURLWithParams(
+    const NavigationManager::WebLoadParams&) {
+  DLOG(WARNING) << "Not yet implemented.";
+}
+
+void WKBasedNavigationManagerImpl::AddTransientURLRewriter(
+    BrowserURLRewriter::URLRewriter rewriter) {
+  DCHECK(rewriter);
+  if (!transient_url_rewriters_) {
+    transient_url_rewriters_.reset(
+        new std::vector<BrowserURLRewriter::URLRewriter>());
+  }
+  transient_url_rewriters_->push_back(rewriter);
+}
+
+int WKBasedNavigationManagerImpl::GetItemCount() const {
+  id<CRWWebViewNavigationProxy> proxy = delegate_->GetWebViewNavigationProxy();
+  if (proxy) {
+    int count_current_page = proxy.backForwardList.currentItem ? 1 : 0;
+    return static_cast<int>(proxy.backForwardList.backList.count) +
+           count_current_page +
+           static_cast<int>(proxy.backForwardList.forwardList.count);
+  }
+
+  // If WebView has not been created, it's fair to say navigation has 0 item.
+  return 0;
+}
+
+NavigationItem* WKBasedNavigationManagerImpl::GetItemAtIndex(
+    size_t index) const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return nullptr;
+}
+
+int WKBasedNavigationManagerImpl::GetIndexOfItem(
+    const NavigationItem* item) const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return -1;
+}
+
+int WKBasedNavigationManagerImpl::GetPendingItemIndex() const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return -1;
+}
+
+int WKBasedNavigationManagerImpl::GetLastCommittedItemIndex() const {
+  id<CRWWebViewNavigationProxy> proxy = delegate_->GetWebViewNavigationProxy();
+  if (proxy.backForwardList.currentItem) {
+    return static_cast<int>(proxy.backForwardList.backList.count);
+  }
+  return -1;
+}
+
+bool WKBasedNavigationManagerImpl::RemoveItemAtIndex(int index) {
+  DLOG(WARNING) << "Not yet implemented.";
+  return true;
+}
+
+bool WKBasedNavigationManagerImpl::CanGoBack() const {
+  return [delegate_->GetWebViewNavigationProxy() canGoBack];
+}
+
+bool WKBasedNavigationManagerImpl::CanGoForward() const {
+  return [delegate_->GetWebViewNavigationProxy() canGoForward];
+}
+
+bool WKBasedNavigationManagerImpl::CanGoToOffset(int offset) const {
+  int index = GetIndexForOffset(offset);
+  return index >= 0 && index < GetItemCount();
+}
+
+void WKBasedNavigationManagerImpl::GoBack() {
+  [delegate_->GetWebViewNavigationProxy() goBack];
+}
+
+void WKBasedNavigationManagerImpl::GoForward() {
+  [delegate_->GetWebViewNavigationProxy() goForward];
+}
+
+void WKBasedNavigationManagerImpl::GoToIndex(int index) {
+  DLOG(WARNING) << "Not yet implemented.";
+}
+
+void WKBasedNavigationManagerImpl::Reload(ReloadType reload_type,
+                                          bool check_for_reposts) {
+  DLOG(WARNING) << "Not yet implemented.";
+}
+
+NavigationItemList WKBasedNavigationManagerImpl::GetBackwardItems() const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return NavigationItemList();
+}
+
+NavigationItemList WKBasedNavigationManagerImpl::GetForwardItems() const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return NavigationItemList();
+}
+
+void WKBasedNavigationManagerImpl::CopyStateFromAndPrune(
+    const NavigationManager* source) {
+  DLOG(WARNING) << "Not yet implemented.";
+}
+
+bool WKBasedNavigationManagerImpl::CanPruneAllButLastCommittedItem() const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return true;
+}
+
+void WKBasedNavigationManagerImpl::RemoveTransientURLRewriters() {
+  transient_url_rewriters_.reset();
+}
+
+std::unique_ptr<std::vector<BrowserURLRewriter::URLRewriter>>
+WKBasedNavigationManagerImpl::GetTransientURLRewriters() {
+  return std::move(transient_url_rewriters_);
+};
+
+NavigationItemImpl* WKBasedNavigationManagerImpl::GetNavigationItemImplAtIndex(
+    size_t index) const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return nullptr;
+}
+
+int WKBasedNavigationManagerImpl::GetPreviousItemIndex() const {
+  DLOG(WARNING) << "Not yet implemented.";
+  return -1;
+}
+
+}  // namespace web