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/* -*- 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/. */
/*
* container for information saved in session history when the document
* is not
*/
#include "nsILayoutHistoryState.h"
#include "nsWeakReference.h"
#include "nsClassHashtable.h"
#include "mozilla/PresState.h"
#include "mozilla/Attributes.h"
#include "mozilla/UniquePtr.h"
using namespace mozilla;
class nsLayoutHistoryState final : public nsILayoutHistoryState,
public nsSupportsWeakReference {
public:
nsLayoutHistoryState() : mScrollPositionOnly(false) {}
NS_DECL_ISUPPORTS
NS_DECL_NSILAYOUTHISTORYSTATE
private:
~nsLayoutHistoryState() = default;
bool mScrollPositionOnly;
nsDataHashtable<nsCStringHashKey, UniquePtr<PresState>> mStates;
};
already_AddRefed<nsILayoutHistoryState> NS_NewLayoutHistoryState() {
RefPtr<nsLayoutHistoryState> state = new nsLayoutHistoryState();
return state.forget();
}
NS_IMPL_ISUPPORTS(nsLayoutHistoryState, nsILayoutHistoryState,
nsISupportsWeakReference)
NS_IMETHODIMP
nsLayoutHistoryState::GetHasStates(bool* aHasStates) {
*aHasStates = HasStates();
return NS_OK;
}
NS_IMETHODIMP
nsLayoutHistoryState::GetKeys(nsTArray<nsCString>& aKeys) {
if (!HasStates()) {
return NS_ERROR_FAILURE;
}
aKeys.SetCapacity(mStates.Count());
for (auto iter = mStates.Iter(); !iter.Done(); iter.Next()) {
aKeys.AppendElement(iter.Key());
}
return NS_OK;
}
NS_IMETHODIMP
nsLayoutHistoryState::GetPresState(const nsACString& aKey, float* aScrollX,
float* aScrollY,
bool* aAllowScrollOriginDowngrade,
float* aRes) {
PresState* state = GetState(nsCString(aKey));
if (!state) {
return NS_ERROR_FAILURE;
}
*aScrollX = state->scrollState().x;
*aScrollY = state->scrollState().y;
*aAllowScrollOriginDowngrade = state->allowScrollOriginDowngrade();
*aRes = state->resolution();
return NS_OK;
}
NS_IMETHODIMP
nsLayoutHistoryState::AddNewPresState(const nsACString& aKey, float aScrollX,
float aScrollY,
bool aAllowScrollOriginDowngrade,
float aRes) {
UniquePtr<PresState> newState = NewPresState();
newState->scrollState() = nsPoint(aScrollX, aScrollY);
newState->allowScrollOriginDowngrade() = aAllowScrollOriginDowngrade;
newState->resolution() = aRes;
mStates.Put(nsCString(aKey), std::move(newState));
return NS_OK;
}
void nsLayoutHistoryState::AddState(const nsCString& aStateKey,
UniquePtr<PresState> aState) {
mStates.Put(aStateKey, std::move(aState));
}
PresState* nsLayoutHistoryState::GetState(const nsCString& aKey) {
UniquePtr<PresState>* statePtr = mStates.GetValue(aKey);
if (!statePtr) {
return nullptr;
}
PresState* state = statePtr->get();
if (mScrollPositionOnly) {
// Ensure any state that shouldn't be restored is removed
state->contentData() = void_t();
state->disabledSet() = false;
}
return state;
}
void nsLayoutHistoryState::RemoveState(const nsCString& aKey) {
mStates.Remove(aKey);
}
bool nsLayoutHistoryState::HasStates() { return mStates.Count() != 0; }
void nsLayoutHistoryState::SetScrollPositionOnly(const bool aFlag) {
mScrollPositionOnly = aFlag;
}
void nsLayoutHistoryState::ResetScrollState() {
for (auto iter = mStates.Iter(); !iter.Done(); iter.Next()) {
PresState* state = iter.Data().get();
if (state) {
state->scrollState() = nsPoint(0, 0);
}
}
}
void nsLayoutHistoryState::GetContents(bool* aScrollPositionOnly,
nsTArray<nsCString>& aKeys,
nsTArray<mozilla::PresState>& aStates) {
*aScrollPositionOnly = mScrollPositionOnly;
aKeys.SetCapacity(mStates.Count());
aStates.SetCapacity(mStates.Count());
for (auto iter = mStates.Iter(); !iter.Done(); iter.Next()) {
aKeys.AppendElement(iter.Key());
aStates.AppendElement(*(iter.Data().get()));
}
}
void nsLayoutHistoryState::Reset() {
mScrollPositionOnly = false;
mStates.Clear();
}
namespace mozilla {
UniquePtr<PresState> NewPresState() {
return MakeUnique<PresState>(
/* contentData */ mozilla::void_t(),
/* scrollState */ nsPoint(0, 0),
/* allowScrollOriginDowngrade */ true,
/* resolution */ 1.0,
/* disabledSet */ false,
/* disabled */ false,
/* droppedDown */ false);
}
} // namespace mozilla