mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-10 11:54:40 +00:00
327 lines
7.9 KiB
C++
327 lines
7.9 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsHistory.h"
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#include "jsapi.h"
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#include "mozilla/dom/HistoryBinding.h"
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#include "nsCOMPtr.h"
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#include "nsPIDOMWindow.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.h"
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#include "nsPresContext.h"
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#include "nsIDocShell.h"
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#include "nsIWebNavigation.h"
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#include "nsIURI.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsReadableUtils.h"
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#include "nsContentUtils.h"
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#include "nsISHistory.h"
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#include "nsISHistoryInternal.h"
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#include "mozilla/Preferences.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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static const char* sAllowPushStatePrefStr =
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"browser.history.allowPushState";
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static const char* sAllowReplaceStatePrefStr =
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"browser.history.allowReplaceState";
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//
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// History class implementation
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//
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(nsHistory)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsHistory)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsHistory)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsHistory)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_ENTRY(nsIDOMHistory) // Empty, needed for extension compat
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NS_INTERFACE_MAP_END
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nsHistory::nsHistory(nsPIDOMWindow* aInnerWindow)
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: mInnerWindow(do_GetWeakReference(aInnerWindow))
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{
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MOZ_ASSERT(aInnerWindow->IsInnerWindow());
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}
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nsHistory::~nsHistory()
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{
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}
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nsPIDOMWindow*
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nsHistory::GetParentObject() const
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{
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nsCOMPtr<nsPIDOMWindow> win(do_QueryReferent(mInnerWindow));
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return win;
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}
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JSObject*
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nsHistory::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return HistoryBinding::Wrap(aCx, this, aGivenProto);
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}
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uint32_t
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nsHistory::GetLength(ErrorResult& aRv) const
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{
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nsCOMPtr<nsPIDOMWindow> win(do_QueryReferent(mInnerWindow));
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if (!win || !win->HasActiveDocument()) {
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aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
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return 0;
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}
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// Get session History from docshell
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nsCOMPtr<nsISHistory> sHistory = GetSessionHistory();
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if (!sHistory) {
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aRv.Throw(NS_ERROR_FAILURE);
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return 0;
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}
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int32_t len;
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nsresult rv = sHistory->GetCount(&len);
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if (NS_FAILED(rv)) {
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aRv.Throw(rv);
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return 0;
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}
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return len >= 0 ? len : 0;
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}
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void
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nsHistory::GetState(JSContext* aCx, JS::MutableHandle<JS::Value> aResult,
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ErrorResult& aRv) const
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{
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nsCOMPtr<nsPIDOMWindow> win(do_QueryReferent(mInnerWindow));
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if (!win) {
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aRv.Throw(NS_ERROR_NOT_AVAILABLE);
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return;
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}
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if (!win->HasActiveDocument()) {
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aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
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return;
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}
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nsCOMPtr<nsIDocument> doc =
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do_QueryInterface(win->GetExtantDoc());
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if (!doc) {
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aRv.Throw(NS_ERROR_NOT_AVAILABLE);
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return;
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}
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nsCOMPtr<nsIVariant> variant;
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doc->GetStateObject(getter_AddRefs(variant));
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if (variant) {
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aRv = variant->GetAsJSVal(aResult);
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if (aRv.Failed()) {
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return;
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}
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if (!JS_WrapValue(aCx, aResult)) {
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aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
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}
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return;
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}
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aResult.setNull();
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}
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void
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nsHistory::Go(int32_t aDelta, ErrorResult& aRv)
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{
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nsCOMPtr<nsPIDOMWindow> win(do_QueryReferent(mInnerWindow));
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if (!win || !win->HasActiveDocument()) {
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aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
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return;
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}
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if (!aDelta) {
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nsCOMPtr<nsPIDOMWindow> window;
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if (nsIDocShell* docShell = GetDocShell()) {
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window = docShell->GetWindow();
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}
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if (window && window->IsHandlingResizeEvent()) {
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// history.go(0) (aka location.reload()) was called on a window
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// that is handling a resize event. Sites do this since Netscape
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// 4.x needed it, but we don't, and it's a horrible experience
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// for nothing. In stead of reloading the page, just clear
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// style data and reflow the page since some sites may use this
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// trick to work around gecko reflow bugs, and this should have
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// the same effect.
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nsCOMPtr<nsIDocument> doc = window->GetExtantDoc();
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nsIPresShell *shell;
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nsPresContext *pcx;
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if (doc && (shell = doc->GetShell()) && (pcx = shell->GetPresContext())) {
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pcx->RebuildAllStyleData(NS_STYLE_HINT_REFLOW, eRestyle_Subtree);
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}
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return;
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}
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}
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nsCOMPtr<nsISHistory> session_history = GetSessionHistory();
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nsCOMPtr<nsIWebNavigation> webnav(do_QueryInterface(session_history));
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if (!webnav) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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int32_t curIndex = -1;
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int32_t len = 0;
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session_history->GetIndex(&curIndex);
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session_history->GetCount(&len);
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int32_t index = curIndex + aDelta;
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if (index > -1 && index < len)
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webnav->GotoIndex(index);
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// Ignore the return value from GotoIndex(), since returning errors
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// from GotoIndex() can lead to exceptions and a possible leak
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// of history length
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}
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void
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nsHistory::Back(ErrorResult& aRv)
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{
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nsCOMPtr<nsPIDOMWindow> win(do_QueryReferent(mInnerWindow));
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if (!win || !win->HasActiveDocument()) {
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aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
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return;
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}
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nsCOMPtr<nsISHistory> sHistory = GetSessionHistory();
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nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(sHistory));
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if (!webNav) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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webNav->GoBack();
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}
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void
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nsHistory::Forward(ErrorResult& aRv)
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{
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nsCOMPtr<nsPIDOMWindow> win(do_QueryReferent(mInnerWindow));
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if (!win || !win->HasActiveDocument()) {
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aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
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return;
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}
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nsCOMPtr<nsISHistory> sHistory = GetSessionHistory();
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nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(sHistory));
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if (!webNav) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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webNav->GoForward();
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}
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void
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nsHistory::PushState(JSContext* aCx, JS::Handle<JS::Value> aData,
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const nsAString& aTitle, const nsAString& aUrl,
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ErrorResult& aRv)
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{
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PushOrReplaceState(aCx, aData, aTitle, aUrl, aRv, false);
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}
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void
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nsHistory::ReplaceState(JSContext* aCx, JS::Handle<JS::Value> aData,
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const nsAString& aTitle, const nsAString& aUrl,
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ErrorResult& aRv)
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{
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PushOrReplaceState(aCx, aData, aTitle, aUrl, aRv, true);
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}
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void
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nsHistory::PushOrReplaceState(JSContext* aCx, JS::Handle<JS::Value> aData,
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const nsAString& aTitle, const nsAString& aUrl,
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ErrorResult& aRv, bool aReplace)
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{
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nsCOMPtr<nsPIDOMWindow> win(do_QueryReferent(mInnerWindow));
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if (!win) {
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aRv.Throw(NS_ERROR_NOT_AVAILABLE);
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return;
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}
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if (!win->HasActiveDocument()) {
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aRv.Throw(NS_ERROR_DOM_SECURITY_ERR);
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return;
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}
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// Check that PushState hasn't been pref'ed off.
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if (!Preferences::GetBool(aReplace ? sAllowReplaceStatePrefStr :
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sAllowPushStatePrefStr, false)) {
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return;
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}
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// AddState might run scripts, so we need to hold a strong reference to the
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// docShell here to keep it from going away.
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nsCOMPtr<nsIDocShell> docShell = win->GetDocShell();
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if (!docShell) {
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aRv.Throw(NS_ERROR_FAILURE);
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return;
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}
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// The "replace" argument tells the docshell to whether to add a new
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// history entry or modify the current one.
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aRv = docShell->AddState(aData, aTitle, aUrl, aReplace, aCx);
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}
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nsIDocShell*
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nsHistory::GetDocShell() const
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{
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nsCOMPtr<nsPIDOMWindow> win = do_QueryReferent(mInnerWindow);
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if (!win) {
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return nullptr;
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}
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return win->GetDocShell();
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}
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already_AddRefed<nsISHistory>
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nsHistory::GetSessionHistory() const
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{
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nsIDocShell *docShell = GetDocShell();
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NS_ENSURE_TRUE(docShell, nullptr);
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// Get the root DocShell from it
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nsCOMPtr<nsIDocShellTreeItem> root;
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docShell->GetSameTypeRootTreeItem(getter_AddRefs(root));
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nsCOMPtr<nsIWebNavigation> webNav(do_QueryInterface(root));
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NS_ENSURE_TRUE(webNav, nullptr);
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nsCOMPtr<nsISHistory> shistory;
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// Get SH from nsIWebNavigation
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webNav->GetSessionHistory(getter_AddRefs(shistory));
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return shistory.forget();
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}
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