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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 "CreateElementTransaction.h"
#include <algorithm>
#include <stdio.h>
#include "mozilla/dom/Element.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/Casting.h"
#include "mozilla/EditorBase.h"
#include "mozilla/EditorDOMPoint.h"
#include "nsAlgorithm.h"
#include "nsAString.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsIContent.h"
#include "nsINode.h"
#include "nsISupportsUtils.h"
#include "nsMemory.h"
#include "nsReadableUtils.h"
#include "nsStringFwd.h"
#include "nsString.h"
namespace mozilla {
using namespace dom;
template already_AddRefed<CreateElementTransaction>
CreateElementTransaction::Create(EditorBase& aEditorBase, nsAtom& aTag,
const EditorDOMPoint& aPointToInsert);
template already_AddRefed<CreateElementTransaction>
CreateElementTransaction::Create(EditorBase& aEditorBase, nsAtom& aTag,
const EditorRawDOMPoint& aPointToInsert);
template <typename PT, typename CT>
already_AddRefed<CreateElementTransaction> CreateElementTransaction::Create(
EditorBase& aEditorBase, nsAtom& aTag,
const EditorDOMPointBase<PT, CT>& aPointToInsert) {
RefPtr<CreateElementTransaction> transaction =
new CreateElementTransaction(aEditorBase, aTag, aPointToInsert);
return transaction.forget();
}
template <typename PT, typename CT>
CreateElementTransaction::CreateElementTransaction(
EditorBase& aEditorBase, nsAtom& aTag,
const EditorDOMPointBase<PT, CT>& aPointToInsert)
: EditTransactionBase(),
mEditorBase(&aEditorBase),
mTag(&aTag),
mPointToInsert(aPointToInsert) {
MOZ_ASSERT(!mPointToInsert.IsInDataNode());
// We only need the child node at inserting new node.
AutoEditorDOMPointOffsetInvalidator lockChild(mPointToInsert);
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(CreateElementTransaction,
EditTransactionBase, mEditorBase,
mPointToInsert, mNewElement)
NS_IMPL_ADDREF_INHERITED(CreateElementTransaction, EditTransactionBase)
NS_IMPL_RELEASE_INHERITED(CreateElementTransaction, EditTransactionBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CreateElementTransaction)
NS_INTERFACE_MAP_END_INHERITING(EditTransactionBase)
NS_IMETHODIMP CreateElementTransaction::DoTransaction() {
if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mTag) ||
NS_WARN_IF(!mPointToInsert.IsSet())) {
return NS_ERROR_NOT_INITIALIZED;
}
OwningNonNull<EditorBase> editorBase = *mEditorBase;
mNewElement = editorBase->CreateHTMLContent(mTag);
if (!mNewElement) {
NS_WARNING("EditorBase::CreateHTMLContent() failed");
return NS_ERROR_FAILURE;
}
// Try to insert formatting white-space for the new node:
OwningNonNull<Element> newElement = *mNewElement;
nsresult rv = editorBase->MarkElementDirty(newElement);
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return EditorBase::ToGenericNSResult(rv);
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::MarkElementDirty() failed, but ignored");
// Insert the new node
ErrorResult error;
InsertNewNode(error);
if (error.Failed()) {
NS_WARNING("CreateElementTransaction::InsertNewNode() failed");
return error.StealNSResult();
}
// Only set selection to insertion point if editor gives permission
if (!editorBase->AllowsTransactionsToChangeSelection()) {
// Do nothing - DOM range gravity will adjust selection
return NS_OK;
}
RefPtr<Selection> selection = editorBase->GetSelection();
if (NS_WARN_IF(!selection)) {
return NS_ERROR_FAILURE;
}
EditorRawDOMPoint afterNewNode(EditorRawDOMPoint::After(newElement));
if (NS_WARN_IF(!afterNewNode.IsSet())) {
// If mutation observer or mutation event listener moved or removed the
// new node, we hit this case. Should we use script blocker while we're
// in this method?
return NS_ERROR_FAILURE;
}
IgnoredErrorResult ignoredError;
selection->CollapseInLimiter(afterNewNode, ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"Selection::CollapseInLimiter() failed, but ignored");
return NS_OK;
}
void CreateElementTransaction::InsertNewNode(ErrorResult& aError) {
MOZ_ASSERT(mNewElement);
MOZ_ASSERT(mPointToInsert.IsSet());
if (mPointToInsert.IsSetAndValid()) {
if (mPointToInsert.IsEndOfContainer()) {
OwningNonNull<nsINode> container = *mPointToInsert.GetContainer();
OwningNonNull<Element> newElement = *mNewElement;
container->AppendChild(newElement, aError);
NS_WARNING_ASSERTION(!aError.Failed(),
"nsINode::AppendChild() failed, but ignored");
return;
}
MOZ_ASSERT(mPointToInsert.GetChild());
OwningNonNull<nsINode> container = *mPointToInsert.GetContainer();
OwningNonNull<nsIContent> child = *mPointToInsert.GetChild();
OwningNonNull<Element> newElement = *mNewElement;
container->InsertBefore(newElement, child, aError);
NS_WARNING_ASSERTION(!aError.Failed(),
"nsINode::InsertBefore() failed, but ignored");
// InsertBefore() may call MightThrowJSException() even if there is no
// error. We don't need the flag here.
aError.WouldReportJSException();
return;
}
// We still know a child, but the child is different element's child,
// we should just return error.
if (NS_WARN_IF(mPointToInsert.GetChild() &&
mPointToInsert.GetContainer() !=
mPointToInsert.GetChild()->GetParentNode())) {
// XXX Is NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE better? Since it won't
// cause throwing exception even if editor user throws an error
// returned from editor's public method.
aError.Throw(NS_ERROR_FAILURE);
return;
}
// If mPointToInsert has only offset and it's not valid, we need to treat
// it as pointing end of the container.
OwningNonNull<nsINode> container = *mPointToInsert.GetContainer();
OwningNonNull<Element> newElement = *mNewElement;
container->AppendChild(newElement, aError);
NS_WARNING_ASSERTION(!aError.Failed(),
"nsINode::AppendChild() failed, but ignored");
}
NS_IMETHODIMP CreateElementTransaction::UndoTransaction() {
if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mPointToInsert.IsSet()) ||
NS_WARN_IF(!mNewElement)) {
return NS_ERROR_NOT_AVAILABLE;
}
OwningNonNull<Element> newElement = *mNewElement;
OwningNonNull<nsINode> containerNode = *mPointToInsert.GetContainer();
ErrorResult error;
containerNode->RemoveChild(newElement, error);
NS_WARNING_ASSERTION(!error.Failed(), "nsINode::RemoveChild() failed");
return error.StealNSResult();
}
NS_IMETHODIMP CreateElementTransaction::RedoTransaction() {
if (NS_WARN_IF(!mEditorBase) || NS_WARN_IF(!mPointToInsert.IsSet()) ||
NS_WARN_IF(!mNewElement)) {
return NS_ERROR_NOT_AVAILABLE;
}
// First, reset mNewElement so it has no attributes or content
// XXX We never actually did this, we only cleared mNewElement's contents if
// it was a CharacterData node (which it's not, it's an Element)
// XXX Don't we need to set selection like DoTransaction()?
// Now, reinsert mNewElement
ErrorResult error;
InsertNewNode(error);
NS_WARNING_ASSERTION(!error.Failed(),
"CreateElementTransaction::InsertNewNode() failed");
return error.StealNSResult();
}
} // namespace mozilla
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