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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "InsertTextTransaction.h"
#include "mozilla/EditorBase.h" // mEditorBase
#include "mozilla/SelectionState.h" // RangeUpdater
#include "mozilla/dom/Selection.h" // Selection local var
#include "mozilla/dom/Text.h" // mTextNode
#include "nsAString.h" // nsAString parameter
#include "nsDebug.h" // for NS_ASSERTION, etc.
#include "nsError.h" // for NS_OK, etc.
#include "nsQueryObject.h" // for do_QueryObject
namespace mozilla {
using namespace dom;
// static
already_AddRefed<InsertTextTransaction> InsertTextTransaction::Create(
EditorBase& aEditorBase, const nsAString& aStringToInsert,
const EditorDOMPointInText& aPointToInsert) {
MOZ_ASSERT(aPointToInsert.IsSetAndValid());
RefPtr<InsertTextTransaction> transaction =
new InsertTextTransaction(aEditorBase, aStringToInsert, aPointToInsert);
return transaction.forget();
}
InsertTextTransaction::InsertTextTransaction(
EditorBase& aEditorBase, const nsAString& aStringToInsert,
const EditorDOMPointInText& aPointToInsert)
: mTextNode(aPointToInsert.ContainerAsText()),
mOffset(aPointToInsert.Offset()),
mStringToInsert(aStringToInsert),
mEditorBase(&aEditorBase) {}
NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertTextTransaction, EditTransactionBase,
mEditorBase, mTextNode)
NS_IMPL_ADDREF_INHERITED(InsertTextTransaction, EditTransactionBase)
NS_IMPL_RELEASE_INHERITED(InsertTextTransaction, EditTransactionBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertTextTransaction)
NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
NS_IMETHODIMP InsertTextTransaction::DoTransaction() {
if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode)) {
return NS_ERROR_NOT_AVAILABLE;
}
OwningNonNull<EditorBase> editorBase = *mEditorBase;
OwningNonNull<Text> textNode = *mTextNode;
ErrorResult error;
editorBase->DoInsertText(textNode, mOffset, mStringToInsert, error);
if (error.Failed()) {
NS_WARNING("EditorBase::DoInsertText() failed");
return error.StealNSResult();
}
// Only set selection to insertion point if editor gives permission
if (editorBase->AllowsTransactionsToChangeSelection()) {
RefPtr<Selection> selection = editorBase->GetSelection();
if (NS_WARN_IF(!selection)) {
return NS_ERROR_FAILURE;
}
DebugOnly<nsresult> rvIgnored = selection->CollapseInLimiter(
textNode, mOffset + mStringToInsert.Length());
NS_ASSERTION(NS_SUCCEEDED(rvIgnored),
"Selection::CollapseInLimiter() failed, but ignored");
} else {
// Do nothing - DOM Range gravity will adjust selection
}
// XXX Other transactions do not do this but its callers do.
// Why do this transaction do this by itself?
editorBase->RangeUpdaterRef().SelAdjInsertText(textNode, mOffset,
mStringToInsert.Length());
return NS_OK;
}
NS_IMETHODIMP InsertTextTransaction::UndoTransaction() {
if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTextNode)) {
return NS_ERROR_NOT_INITIALIZED;
}
OwningNonNull<EditorBase> editorBase = *mEditorBase;
OwningNonNull<Text> textNode = *mTextNode;
ErrorResult error;
editorBase->DoDeleteText(textNode, mOffset, mStringToInsert.Length(), error);
NS_WARNING_ASSERTION(!error.Failed(), "EditorBase::DoDeleteText() failed");
return error.StealNSResult();
}
NS_IMETHODIMP InsertTextTransaction::Merge(nsITransaction* aOtherTransaction,
bool* aDidMerge) {
if (NS_WARN_IF(!aOtherTransaction) || NS_WARN_IF(!aDidMerge)) {
return NS_ERROR_INVALID_ARG;
}
// Set out param default value
*aDidMerge = false;
RefPtr<EditTransactionBase> otherTransactionBase =
aOtherTransaction->GetAsEditTransactionBase();
if (!otherTransactionBase) {
return NS_OK;
}
// If aTransaction is a InsertTextTransaction, and if the selection hasn't
// changed, then absorb it.
InsertTextTransaction* otherInsertTextTransaction =
otherTransactionBase->GetAsInsertTextTransaction();
if (!otherInsertTextTransaction ||
!IsSequentialInsert(*otherInsertTextTransaction)) {
return NS_OK;
}
nsAutoString otherData;
otherInsertTextTransaction->GetData(otherData);
mStringToInsert += otherData;
*aDidMerge = true;
return NS_OK;
}
/* ============ private methods ================== */
void InsertTextTransaction::GetData(nsString& aResult) {
aResult = mStringToInsert;
}
bool InsertTextTransaction::IsSequentialInsert(
InsertTextTransaction& aOtherTransaction) {
return aOtherTransaction.mTextNode == mTextNode &&
aOtherTransaction.mOffset == mOffset + mStringToInsert.Length();
}
} // namespace mozilla
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