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-rw-r--r--dom/base/GroupedSHistory.cpp172
1 files changed, 172 insertions, 0 deletions
diff --git a/dom/base/GroupedSHistory.cpp b/dom/base/GroupedSHistory.cpp
new file mode 100644
index 000000000..266b1fd36
--- /dev/null
+++ b/dom/base/GroupedSHistory.cpp
@@ -0,0 +1,172 @@
+/* -*- 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