зеркало из https://github.com/mozilla/gecko-dev.git
112 строки
3.4 KiB
C++
112 строки
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ChangeAttributeTxn.h"
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#include "nsAString.h"
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#include "nsDebug.h" // for NS_ASSERTION
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#include "nsError.h" // for NS_ERROR_NOT_INITIALIZED, etc
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#include "nsEditor.h" // for nsEditor
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#include "nsString.h" // for nsString
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#include "mozilla/dom/Element.h"
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using namespace mozilla;
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ChangeAttributeTxn::ChangeAttributeTxn()
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: EditTxn()
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{
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}
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NS_IMPL_CYCLE_COLLECTION_INHERITED(ChangeAttributeTxn, EditTxn,
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mElement)
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NS_IMPL_ADDREF_INHERITED(ChangeAttributeTxn, EditTxn)
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NS_IMPL_RELEASE_INHERITED(ChangeAttributeTxn, EditTxn)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ChangeAttributeTxn)
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NS_INTERFACE_MAP_END_INHERITING(EditTxn)
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NS_IMETHODIMP ChangeAttributeTxn::Init(nsEditor *aEditor,
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dom::Element *aElement,
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const nsAString& aAttribute,
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const nsAString& aValue,
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bool aRemoveAttribute)
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{
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NS_ASSERTION(aEditor && aElement, "bad arg");
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if (!aEditor || !aElement) { return NS_ERROR_NULL_POINTER; }
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mEditor = aEditor;
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mElement = aElement;
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mAttribute = aAttribute;
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mValue = aValue;
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mRemoveAttribute = aRemoveAttribute;
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mAttributeWasSet=false;
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mUndoValue.Truncate();
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return NS_OK;
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}
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NS_IMETHODIMP ChangeAttributeTxn::DoTransaction(void)
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{
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NS_ASSERTION(mEditor && mElement, "bad state");
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if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
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nsCOMPtr<nsIDOMElement> element = do_QueryInterface(mElement);
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// need to get the current value of the attribute and save it, and set mAttributeWasSet
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nsresult result = mEditor->GetAttributeValue(element, mAttribute, mUndoValue, &mAttributeWasSet);
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NS_ENSURE_SUCCESS(result, result);
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// XXX: hack until attribute-was-set code is implemented
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if (!mUndoValue.IsEmpty())
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mAttributeWasSet = true;
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// XXX: end hack
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ErrorResult rv;
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// now set the attribute to the new value
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if (!mRemoveAttribute)
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mElement->SetAttribute(mAttribute, mValue, rv);
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else
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mElement->RemoveAttribute(mAttribute, rv);
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return rv.ErrorCode();
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}
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NS_IMETHODIMP ChangeAttributeTxn::UndoTransaction(void)
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{
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NS_ASSERTION(mEditor && mElement, "bad state");
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if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
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ErrorResult rv;
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if (mAttributeWasSet)
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mElement->SetAttribute(mAttribute, mUndoValue, rv);
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else
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mElement->RemoveAttribute(mAttribute, rv);
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return rv.ErrorCode();
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}
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NS_IMETHODIMP ChangeAttributeTxn::RedoTransaction(void)
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{
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NS_ASSERTION(mEditor && mElement, "bad state");
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if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
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ErrorResult rv;
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if (!mRemoveAttribute)
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mElement->SetAttribute(mAttribute, mValue, rv);
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else
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mElement->RemoveAttribute(mAttribute, rv);
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return rv.ErrorCode();
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}
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NS_IMETHODIMP ChangeAttributeTxn::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("ChangeAttributeTxn: [mRemoveAttribute == ");
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if (!mRemoveAttribute)
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aString.AppendLiteral("false] ");
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else
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aString.AppendLiteral("true] ");
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aString += mAttribute;
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return NS_OK;
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}
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