Upstream ios/web/navigation

ios/web/navigation/navigation_manager_impl.mm

+// Copyright 2013 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 "ios/web/navigation/navigation_manager_impl.h"
+
+#include "base/logging.h"
+#import "ios/web/navigation/crw_session_controller+private_constructors.h"
+#import "ios/web/navigation/crw_session_controller.h"
+#import "ios/web/navigation/crw_session_entry.h"
+#include "ios/web/navigation/navigation_item_impl.h"
+#include "ios/web/navigation/navigation_manager_delegate.h"
+#import "ios/web/navigation/navigation_manager_facade_delegate.h"
+#include "ios/web/public/load_committed_details.h"
+#include "ios/web/public/navigation_item.h"
+#include "ios/web/public/web_state/web_state.h"
+#include "ui/base/page_transition_types.h"
+
+namespace {
+
+// Checks whether or not two URL are an in-page navigation (differing only
+// in the fragment).
+bool AreURLsInPageNavigation(const GURL& existing_url, const GURL& new_url) {
+  if (existing_url == new_url || !new_url.has_ref())
+    return false;
+
+  url::Replacements<char> replacements;
+  replacements.ClearRef();
+  return existing_url.ReplaceComponents(replacements) ==
+      new_url.ReplaceComponents(replacements);
+}
+
+}  // anonymous namespace
+
+namespace web {
+
+NavigationManagerImpl::NavigationManagerImpl(
+    NavigationManagerDelegate* delegate,
+    BrowserState* browser_state)
+    : delegate_(delegate),
+      browser_state_(browser_state),
+      facade_delegate_(nullptr) {
+  DCHECK(browser_state_);
+}
+
+NavigationManagerImpl::~NavigationManagerImpl() {
+  // The facade layer should be deleted before this object.
+  DCHECK(!facade_delegate_);
+
+  [session_controller_ setNavigationManager:nullptr];
+}
+
+CRWSessionController* NavigationManagerImpl::GetSessionController() {
+  return session_controller_;
+}
+
+void NavigationManagerImpl::SetSessionController(
+    CRWSessionController* session_controller) {
+  session_controller_.reset([session_controller retain]);
+  [session_controller_ setNavigationManager:this];
+}
+
+void NavigationManagerImpl::InitializeSession(NSString* window_name,
+                                              NSString* opener_id,
+                                              BOOL opened_by_dom,
+                                              int opener_navigation_index) {
+  SetSessionController([[[CRWSessionController alloc]
+         initWithWindowName:window_name
+                   openerId:opener_id
+                openedByDOM:opened_by_dom
+      openerNavigationIndex:opener_navigation_index
+               browserState:browser_state_] autorelease]);
+}
+
+void NavigationManagerImpl::ReplaceSessionHistory(
+    ScopedVector<web::NavigationItem> items,
+    int current_index) {
+  SetSessionController([[[CRWSessionController alloc]
+      initWithNavigationItems:items.Pass()
+                 currentIndex:current_index
+                 browserState:browser_state_] autorelease]);
+}
+
+void NavigationManagerImpl::SetFacadeDelegate(
+    NavigationManagerFacadeDelegate* facade_delegate) {
+  facade_delegate_ = facade_delegate;
+}
+
+NavigationManagerFacadeDelegate* NavigationManagerImpl::GetFacadeDelegate()
+    const {
+  return facade_delegate_;
+}
+
+
+void NavigationManagerImpl::OnNavigationItemChanged() {
+  if (facade_delegate_)
+    facade_delegate_->OnNavigationItemChanged();
+}
+
+void NavigationManagerImpl::OnNavigationItemCommitted() {
+  LoadCommittedDetails details;
+  details.item = GetLastCommittedItem();
+  DCHECK(details.item);
+  details.previous_item_index = [session_controller_ previousNavigationIndex];
+  if (details.previous_item_index >= 0) {
+    DCHECK([session_controller_ previousEntry]);
+    details.previous_url =
+        [session_controller_ previousEntry].navigationItem->GetURL();
+    details.is_in_page =
+        AreURLsInPageNavigation(details.previous_url, details.item->GetURL());
+  } else {
+    details.previous_url = GURL();
+    details.is_in_page = NO;
+  }
+
+  delegate_->OnNavigationItemCommitted(details);
+
+  if (facade_delegate_) {
+    facade_delegate_->OnNavigationItemCommitted(details.previous_item_index,
+                                                details.is_in_page);
+  }
+}
+
+NavigationItem* NavigationManagerImpl::GetVisibleItem() const {
+  CRWSessionEntry* entry = [session_controller_ visibleEntry];
+  return [entry navigationItem];
+}
+
+NavigationItem* NavigationManagerImpl::GetPendingItem() const {
+  return [[session_controller_ pendingEntry] navigationItem];
+}
+
+NavigationItem* NavigationManagerImpl::GetTransientItem() const {
+  return [[session_controller_ transientEntry] navigationItem];
+}
+
+NavigationItem* NavigationManagerImpl::GetLastCommittedItem() const {
+  CRWSessionEntry* entry = [session_controller_ lastCommittedEntry];
+  return [entry navigationItem];
+}
+
+NavigationItem* NavigationManagerImpl::GetItemAtIndex(size_t index) const {
+  NSArray* entries =  [session_controller_ entries];
+  return index < entries.count ? [entries[index] navigationItem] : nullptr;
+}
+
+int NavigationManagerImpl::GetCurrentEntryIndex() const {
+  return [session_controller_ currentNavigationIndex];
+}
+
+int NavigationManagerImpl::GetLastCommittedEntryIndex() const {
+  if (![[session_controller_ entries] count])
+    return -1;
+  return [session_controller_ currentNavigationIndex];
+}
+
+int NavigationManagerImpl::GetEntryCount() const {
+  return [[session_controller_ entries] count];
+}
+
+bool NavigationManagerImpl::RemoveEntryAtIndex(int index) {
+  if (index == GetLastCommittedEntryIndex() ||
+      index == GetPendingEntryIndex())
+    return false;
+
+  NSUInteger idx = static_cast<NSUInteger>(index);
+  NSArray* entries = [session_controller_ entries];
+  if (idx >= entries.count)
+    return false;
+
+  [session_controller_ removeEntryAtIndex:index];
+  return true;
+}
+
+void NavigationManagerImpl::DiscardNonCommittedEntries() {
+  [session_controller_ discardNonCommittedEntries];
+}
+
+NavigationItem* NavigationManagerImpl::GetLastUserItem() const {
+  CRWSessionEntry* entry = [session_controller_ lastUserEntry];
+  return [entry navigationItem];
+}
+
+NavigationItem* NavigationManagerImpl::GetPreviousItem() const {
+  CRWSessionEntry* entry = [session_controller_ previousEntry];
+  return [entry navigationItem];
+}
+
+int NavigationManagerImpl::GetPendingEntryIndex() const {
+  if ([session_controller_ hasPendingEntry])
+    return GetCurrentEntryIndex();
+  return -1;
+}
+
+void NavigationManagerImpl::LoadURL(const GURL& url,
+                                    const web::Referrer& referrer,
+                                    ui::PageTransition type) {
+  WebState::OpenURLParams params(url, referrer, CURRENT_TAB, type, NO);
+  delegate_->GetWebState()->OpenURL(params);
+}
+
+bool NavigationManagerImpl::CanGoBack() const {
+  return [session_controller_ canGoBack];
+}
+
+bool NavigationManagerImpl::CanGoForward() const {
+  return [session_controller_ canGoForward];
+}
+
+void NavigationManagerImpl::GoBack() {
+  if (CanGoBack()) {
+    [session_controller_ goBack];
+    // Signal the delegate to load the old page.
+    delegate_->NavigateToPendingEntry();
+  }
+}
+
+void NavigationManagerImpl::GoForward() {
+  if (CanGoForward()) {
+    [session_controller_ goForward];
+    // Signal the delegate to load the new page.
+    delegate_->NavigateToPendingEntry();
+  }
+}
+
+std::vector<NavigationItem*> NavigationManagerImpl::GetItems() {
+  std::vector<NavigationItem*> items;
+  size_t i = 0;
+  items.resize([session_controller_ entries].count);
+  for (CRWSessionEntry* entry in [session_controller_ entries]) {
+    items[i++] = entry.navigationItem;
+  }
+  return items;
+}
+
+BrowserState* NavigationManagerImpl::GetBrowserState() const {
+  return browser_state_;
+}
+
+WebState* NavigationManagerImpl::GetWebState() const {
+  return delegate_->GetWebState();
+}
+
+void NavigationManagerImpl::CopyState(
+    NavigationManagerImpl* navigation_manager) {
+  SetSessionController(
+      [[navigation_manager->GetSessionController() copy] autorelease]);
+}
+
+}  // namespace web
+