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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/. */
#include "GroupedSHistory.h"
#include "TabParent.h"
#include "PartialSHistory.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION(GroupedSHistory, mPartialHistories)
NS_IMPL_CYCLE_COLLECTING_ADDREF(GroupedSHistory)
NS_IMPL_CYCLE_COLLECTING_RELEASE(GroupedSHistory)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GroupedSHistory)
NS_INTERFACE_MAP_ENTRY(nsIGroupedSHistory)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIGroupedSHistory)
NS_INTERFACE_MAP_END
GroupedSHistory::GroupedSHistory()
: mCount(0),
mIndexOfActivePartialHistory(-1)
{
}
NS_IMETHODIMP
GroupedSHistory::GetCount(uint32_t* aResult)
{
MOZ_ASSERT(aResult);
*aResult = mCount;
return NS_OK;
}
NS_IMETHODIMP
GroupedSHistory::AppendPartialSessionHistory(nsIPartialSHistory* aPartialHistory)
{
if (!aPartialHistory) {
return NS_ERROR_INVALID_POINTER;
}
nsCOMPtr<nsIPartialSHistory> partialHistory(aPartialHistory);
if (!partialHistory || mPartialHistories.Contains(partialHistory)) {
return NS_ERROR_FAILURE;
}
// Remove all items after active one and deactive it, unless it's the first
// call and no active partial history has been set yet.
if (mIndexOfActivePartialHistory >= 0) {
PurgePartialHistories(mIndexOfActivePartialHistory);
nsCOMPtr<nsIPartialSHistory> prevPartialHistory =
mPartialHistories[mIndexOfActivePartialHistory];
if (NS_WARN_IF(!prevPartialHistory)) {
// Cycle collected?
return NS_ERROR_UNEXPECTED;
}
prevPartialHistory->OnDeactive();
}
// Attach the partial history.
uint32_t offset = mCount;
mCount += partialHistory->GetCount();
mPartialHistories.AppendElement(partialHistory);
partialHistory->OnAttachGroupedSessionHistory(offset);
mIndexOfActivePartialHistory = mPartialHistories.Count() - 1;
return NS_OK;
}
NS_IMETHODIMP
GroupedSHistory::OnPartialSessionHistoryChange(
nsIPartialSHistory* aPartialSessionHistory)
{
if (!aPartialSessionHistory) {
return NS_ERROR_INVALID_POINTER;
}
nsCOMPtr<nsIPartialSHistory> partialHistory(aPartialSessionHistory);
int32_t index = mPartialHistories.IndexOf(partialHistory);
if (NS_WARN_IF(index != mIndexOfActivePartialHistory) ||
NS_WARN_IF(index < 0)) {
// Non-active or not attached partialHistory
return NS_ERROR_UNEXPECTED;
}
PurgePartialHistories(index);
// Update global count.
uint32_t count = partialHistory->GetCount();
uint32_t offset = partialHistory->GetGlobalIndexOffset();
mCount = count + offset;
return NS_OK;
}
NS_IMETHODIMP
GroupedSHistory::GotoIndex(uint32_t aGlobalIndex,
nsIFrameLoader** aTargetLoaderToSwap)
{
nsCOMPtr<nsIPartialSHistory> currentPartialHistory =
mPartialHistories[mIndexOfActivePartialHistory];
if (!currentPartialHistory) {
// Cycle collected?
return NS_ERROR_UNEXPECTED;
}
for (uint32_t i = 0; i < mPartialHistories.Length(); i++) {
nsCOMPtr<nsIPartialSHistory> partialHistory = mPartialHistories[i];
if (NS_WARN_IF(!partialHistory)) {
// Cycle collected?
return NS_ERROR_UNEXPECTED;
}
// Examine index range.
uint32_t offset = partialHistory->GetGlobalIndexOffset();
uint32_t count = partialHistory->GetCount();
if (offset <= aGlobalIndex && (offset + count) > aGlobalIndex) {
uint32_t targetIndex = aGlobalIndex - offset;
partialHistory->GetOwnerFrameLoader(aTargetLoaderToSwap);
if ((size_t)mIndexOfActivePartialHistory == i) {
return NS_OK;
}
mIndexOfActivePartialHistory = i;
if (NS_FAILED(currentPartialHistory->OnDeactive()) ||
NS_FAILED(partialHistory->OnActive(mCount, targetIndex))) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
}
// Index not found.
NS_WARNING("Out of index request!");
return NS_ERROR_FAILURE;
}
void
GroupedSHistory::PurgePartialHistories(uint32_t aLastPartialIndexToKeep)
{
uint32_t lastIndex = mPartialHistories.Length() - 1;
if (aLastPartialIndexToKeep >= lastIndex) {
// Nothing to remove.
return;
}
// Close tabs.
for (uint32_t i = lastIndex; i > aLastPartialIndexToKeep; i--) {
nsCOMPtr<nsIPartialSHistory> partialHistory = mPartialHistories[i];
if (!partialHistory) {
// Cycle collected?
return;
}
nsCOMPtr<nsIFrameLoader> loader;
partialHistory->GetOwnerFrameLoader(getter_AddRefs(loader));
loader->RequestFrameLoaderClose();
}
// Remove references.
mPartialHistories.RemoveElementsAt(aLastPartialIndexToKeep + 1,
lastIndex - aLastPartialIndexToKeep);
}
/* static */ bool
GroupedSHistory::GroupedHistoryEnabled() {
return Preferences::GetBool("browser.groupedhistory.enabled", false);
}
} // namespace dom
} // namespace mozilla
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