1 files changed, 346 insertions, 0 deletions
diff --git a/dom/base/nsHistory.cpp b/dom/base/nsHistory.cpp
new file mode 100644
index 000000000..3459df4b0
--- /dev/null
+++ b/dom/base/nsHistory.cpp
@@ -0,0 +1,346 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsHistory.h"
+
+#include "jsapi.h"
+#include "nsCOMPtr.h"
+#include "nsPIDOMWindow.h"
+#include "nsIDocument.h"
+#include "nsIPresShell.h"
+#include "nsPresContext.h"
+#include "nsIDocShell.h"
+#include "nsIWebNavigation.h"
+#include "nsIURI.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsReadableUtils.h"
+#include "nsContentUtils.h"
+#include "nsISHistory.h"
+#include "nsISHistoryInternal.h"
+#include "mozilla/Preferences.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+//
+//  History class implementation
+//
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(nsHistory)
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsHistory)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsHistory)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsHistory)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+  NS_INTERFACE_MAP_ENTRY(nsIDOMHistory) // Empty, needed for extension compat
+NS_INTERFACE_MAP_END
+
+nsHistory::nsHistory(nsPIDOMWindowInner* aInnerWindow)
+  : mInnerWindow(do_GetWeakReference(aInnerWindow))
+{
+  MOZ_ASSERT(aInnerWindow->IsInnerWindow());
+}
+
+nsHistory::~nsHistory()
+{
+}
+
+nsPIDOMWindowInner*
+nsHistory::GetParentObject() const
+{
+  nsCOMPtr<nsPIDOMWindowInner> win(do_QueryReferent(mInnerWindow));
+  return win;
+}
+
+JSObject*
+nsHistory::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return HistoryBinding::Wrap(aCx, this, aGivenProto);
+}
+
+uint32_t
+nsHistory::GetLength(ErrorResult& aRv) const
+{
+  nsCOMPtr<nsPIDOMWindowInner> win(do_QueryReferent(mInnerWindow));
+  if (!win || !win->HasActiveDocument()) {
+    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+
+    return 0;
+  }
+
+  // Get session History from docshell
+  nsCOMPtr<nsISHistory> sHistory = GetSessionHistory();
+  if (!sHistory) {
+    aRv.Throw(NS_ERROR_FAILURE);
+
+    return 0;
+  }
+
+  int32_t len;
+  nsresult rv = sHistory->GetCount(&len);
+
+  if (NS_FAILED(rv)) {
+    aRv.Throw(rv);
+
+    return 0;
+  }
+
+  return len >= 0 ? len : 0;
+}
+
+ScrollRestoration
+nsHistory::GetScrollRestoration(mozilla::ErrorResult& aRv)
+{
+  nsCOMPtr<nsPIDOMWindowInner> win(do_QueryReferent(mInnerWindow));
+  if (!win || !win->HasActiveDocument() || !win->GetDocShell()) {
+    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+    return mozilla::dom::ScrollRestoration::Auto;
+  }
+
+  bool currentScrollRestorationIsManual = false;
+  win->GetDocShell()->
+    GetCurrentScrollRestorationIsManual(&currentScrollRestorationIsManual);
+  return currentScrollRestorationIsManual ?
+    mozilla::dom::ScrollRestoration::Manual :
+    mozilla::dom::ScrollRestoration::Auto;
+}
+
+void
+nsHistory::SetScrollRestoration(mozilla::dom::ScrollRestoration aMode,
+                                mozilla::ErrorResult& aRv)
+{
+  nsCOMPtr<nsPIDOMWindowInner> win(do_QueryReferent(mInnerWindow));
+  if (!win || !win->HasActiveDocument() || !win->GetDocShell()) {
+    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+    return;
+  }
+
+  win->GetDocShell()->
+    SetCurrentScrollRestorationIsManual(
+      aMode == mozilla::dom::ScrollRestoration::Manual);
+}
+
+void
+nsHistory::GetState(JSContext* aCx, JS::MutableHandle<JS::Value> aResult,
+                    ErrorResult& aRv) const
+{
+  nsCOMPtr<nsPIDOMWindowInner> win(do_QueryReferent(mInnerWindow));
+  if (!win) {
+    aRv.Throw(NS_ERROR_NOT_AVAILABLE);
+    return;
+  }
+
+  if (!win->HasActiveDocument()) {
+    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+    return;
+  }
+
+  nsCOMPtr<nsIDocument> doc =
+    do_QueryInterface(win->GetExtantDoc());
+  if (!doc) {
+    aRv.Throw(NS_ERROR_NOT_AVAILABLE);
+    return;
+  }
+
+  nsCOMPtr<nsIVariant> variant;
+  doc->GetStateObject(getter_AddRefs(variant));
+
+  if (variant) {
+    aRv = variant->GetAsJSVal(aResult);
+
+    if (aRv.Failed()) {
+      return;
+    }
+
+    if (!JS_WrapValue(aCx, aResult)) {
+      aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
+    }
+
+    return;
+  }
+
+  aResult.setNull();
+}
+
+void
+nsHistory::Go(int32_t aDelta, ErrorResult& aRv)
+{
+  nsCOMPtr<nsPIDOMWindowInner> win(do_QueryReferent(mInnerWindow));
+  if (!win || !win->HasActiveDocument()) {
+    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+
+    return;
+  }
+
+  if (!aDelta) {
+    nsCOMPtr<nsPIDOMWindowOuter> window;
+    if (nsIDocShell* docShell = GetDocShell()) {
+      window = docShell->GetWindow();
+    }
+
+    if (window && window->IsHandlingResizeEvent()) {
+      // history.go(0) (aka location.reload()) was called on a window
+      // that is handling a resize event. Sites do this since Netscape
+      // 4.x needed it, but we don't, and it's a horrible experience
+      // for nothing.  In stead of reloading the page, just clear
+      // style data and reflow the page since some sites may use this
+      // trick to work around gecko reflow bugs, and this should have
+      // the same effect.
+
+      nsCOMPtr<nsIDocument> doc = window->GetExtantDoc();
+
+      nsIPresShell *shell;
+      nsPresContext *pcx;
+      if (doc && (shell = doc->GetShell()) && (pcx = shell->GetPresContext())) {
+        pcx->RebuildAllStyleData(NS_STYLE_HINT_REFLOW, eRestyle_Subtree);
+      }
+
+      return;
+    }
+  }
+
+  nsCOMPtr<nsISHistory> session_history = GetSessionHistory();
+  nsCOMPtr<nsIWebNavigation> webnav(do_QueryInterface(session_history));
+  if (!webnav) {
+    aRv.Throw(NS_ERROR_FAILURE);
+
+    return;
+  }
+
+  int32_t curIndex = -1;
+  int32_t len = 0;
+  session_history->GetIndex(&curIndex);
+  session_history->GetCount(&len);
+
+  int32_t index = curIndex + aDelta;
+  if (index > -1 && index < len)
+    webnav->GotoIndex(index);
+
+  // Ignore the return value from GotoIndex(), since returning errors
+  // from GotoIndex() can lead to exceptions and a possible leak
+  // of history length
+}
+
+void
+nsHistory::Back(ErrorResult& aRv)
+{
+  nsCOMPtr<nsPIDOMWindowInner> win(do_QueryReferent(mInnerWindow));
+  if (!win || !win->HasActiveDocument()) {
+    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+
+    return;
+  }
+
+  nsCOMPtr<nsISHistory> sHistory = GetSessionHistory();
+  nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(sHistory));
+  if (!webNav) {
+    aRv.Throw(NS_ERROR_FAILURE);
+
+    return;
+  }
+
+  webNav->GoBack();
+}
+
+void
+nsHistory::Forward(ErrorResult& aRv)
+{
+  nsCOMPtr<nsPIDOMWindowInner> win(do_QueryReferent(mInnerWindow));
+  if (!win || !win->HasActiveDocument()) {
+    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+
+    return;
+  }
+
+  nsCOMPtr<nsISHistory> sHistory = GetSessionHistory();
+  nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(sHistory));
+  if (!webNav) {
+    aRv.Throw(NS_ERROR_FAILURE);
+
+    return;
+  }
+
+  webNav->GoForward();
+}
+
+void
+nsHistory::PushState(JSContext* aCx, JS::Handle<JS::Value> aData,
+                     const nsAString& aTitle, const nsAString& aUrl,
+                     ErrorResult& aRv)
+{
+  PushOrReplaceState(aCx, aData, aTitle, aUrl, aRv, false);
+}
+
+void
+nsHistory::ReplaceState(JSContext* aCx, JS::Handle<JS::Value> aData,
+                        const nsAString& aTitle, const nsAString& aUrl,
+                        ErrorResult& aRv)
+{
+  PushOrReplaceState(aCx, aData, aTitle, aUrl, aRv, true);
+}
+
+void
+nsHistory::PushOrReplaceState(JSContext* aCx, JS::Handle<JS::Value> aData,
+                              const nsAString& aTitle, const nsAString& aUrl,
+                              ErrorResult& aRv, bool aReplace)
+{
+  nsCOMPtr<nsPIDOMWindowInner> win(do_QueryReferent(mInnerWindow));
+  if (!win) {
+    aRv.Throw(NS_ERROR_NOT_AVAILABLE);
+
+    return;
+  }
+
+  if (!win->HasActiveDocument()) {
+    aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
+
+    return;
+  }
+
+  // AddState might run scripts, so we need to hold a strong reference to the
+  // docShell here to keep it from going away.
+  nsCOMPtr<nsIDocShell> docShell = win->GetDocShell();
+
+  if (!docShell) {
+    aRv.Throw(NS_ERROR_FAILURE);
+
+    return;
+  }
+
+  // The "replace" argument tells the docshell to whether to add a new
+  // history entry or modify the current one.
+
+  aRv = docShell->AddState(aData, aTitle, aUrl, aReplace, aCx);
+}
+
+nsIDocShell*
+nsHistory::GetDocShell() const
+{
+  nsCOMPtr<nsPIDOMWindowInner> win = do_QueryReferent(mInnerWindow);
+  if (!win) {
+    return nullptr;
+  }
+  return win->GetDocShell();
+}
+
+already_AddRefed<nsISHistory>
+nsHistory::GetSessionHistory() const
+{
+  nsIDocShell *docShell = GetDocShell();
+  NS_ENSURE_TRUE(docShell, nullptr);
+
+  // Get the root DocShell from it
+  nsCOMPtr<nsIDocShellTreeItem> root;
+  docShell->GetSameTypeRootTreeItem(getter_AddRefs(root));
+  nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(root));
+  NS_ENSURE_TRUE(webNav, nullptr);
+
+  nsCOMPtr<nsISHistory> shistory;
+
+  // Get SH from nsIWebNavigation
+  webNav->GetSessionHistory(getter_AddRefs(shistory));
+
+  return shistory.forget();
+}