michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include <stdio.h>
michael@0: 
michael@0: #include "CreateElementTxn.h"
michael@0: #include "mozilla/dom/Element.h"
michael@0: #include "nsAlgorithm.h"
michael@0: #include "nsDebug.h"
michael@0: #include "nsEditor.h"
michael@0: #include "nsError.h"
michael@0: #include "nsIContent.h"
michael@0: #include "nsIDOMCharacterData.h"
michael@0: #include "nsIEditor.h"
michael@0: #include "nsINode.h"
michael@0: #include "nsISelection.h"
michael@0: #include "nsISupportsUtils.h"
michael@0: #include "nsMemory.h"
michael@0: #include "nsReadableUtils.h"
michael@0: #include "nsStringFwd.h"
michael@0: #include "nsString.h"
michael@0: #include "nsAString.h"
michael@0: #include <algorithm>
michael@0: 
michael@0: using namespace mozilla;
michael@0: 
michael@0: CreateElementTxn::CreateElementTxn()
michael@0:   : EditTxn()
michael@0: {
michael@0: }
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_INHERITED(CreateElementTxn, EditTxn,
michael@0:                                    mParent,
michael@0:                                    mNewNode,
michael@0:                                    mRefNode)
michael@0: 
michael@0: NS_IMPL_ADDREF_INHERITED(CreateElementTxn, EditTxn)
michael@0: NS_IMPL_RELEASE_INHERITED(CreateElementTxn, EditTxn)
michael@0: NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CreateElementTxn)
michael@0: NS_INTERFACE_MAP_END_INHERITING(EditTxn)
michael@0: NS_IMETHODIMP CreateElementTxn::Init(nsEditor      *aEditor,
michael@0:                                      const nsAString &aTag,
michael@0:                                      nsIDOMNode     *aParent,
michael@0:                                      uint32_t        aOffsetInParent)
michael@0: {
michael@0:   NS_ASSERTION(aEditor&&aParent, "null args");
michael@0:   if (!aEditor || !aParent) { return NS_ERROR_NULL_POINTER; }
michael@0: 
michael@0:   mEditor = aEditor;
michael@0:   mTag = aTag;
michael@0:   mParent = do_QueryInterface(aParent);
michael@0:   mOffsetInParent = aOffsetInParent;
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP CreateElementTxn::DoTransaction(void)
michael@0: {
michael@0:   NS_ASSERTION(mEditor && mParent, "bad state");
michael@0:   NS_ENSURE_TRUE(mEditor && mParent, NS_ERROR_NOT_INITIALIZED);
michael@0: 
michael@0:   nsCOMPtr<dom::Element> newContent;
michael@0: 
michael@0:   //new call to use instead to get proper HTML element, bug# 39919
michael@0:   nsresult result = mEditor->CreateHTMLContent(mTag, getter_AddRefs(newContent));
michael@0:   NS_ENSURE_SUCCESS(result, result);
michael@0:   NS_ENSURE_STATE(newContent);
michael@0: 
michael@0:   mNewNode = newContent->AsDOMNode();
michael@0:   // Try to insert formatting whitespace for the new node:
michael@0:   mEditor->MarkNodeDirty(mNewNode);
michael@0: 
michael@0:   // insert the new node
michael@0:   if (CreateElementTxn::eAppend == int32_t(mOffsetInParent)) {
michael@0:     nsCOMPtr<nsIDOMNode> resultNode;
michael@0:     return mParent->AppendChild(mNewNode, getter_AddRefs(resultNode));
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsINode> parent = do_QueryInterface(mParent);
michael@0:   NS_ENSURE_STATE(parent);
michael@0: 
michael@0:   mOffsetInParent = XPCOM_MIN(mOffsetInParent, parent->GetChildCount());
michael@0: 
michael@0:   // note, it's ok for mRefNode to be null.  that means append
michael@0:   nsIContent* refNode = parent->GetChildAt(mOffsetInParent);
michael@0:   mRefNode = refNode ? refNode->AsDOMNode() : nullptr;
michael@0: 
michael@0:   nsCOMPtr<nsIDOMNode> resultNode;
michael@0:   result = mParent->InsertBefore(mNewNode, mRefNode, getter_AddRefs(resultNode));
michael@0:   NS_ENSURE_SUCCESS(result, result); 
michael@0: 
michael@0:   // only set selection to insertion point if editor gives permission
michael@0:   bool bAdjustSelection;
michael@0:   mEditor->ShouldTxnSetSelection(&bAdjustSelection);
michael@0:   if (!bAdjustSelection) {
michael@0:     // do nothing - dom range gravity will adjust selection
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsISelection> selection;
michael@0:   result = mEditor->GetSelection(getter_AddRefs(selection));
michael@0:   NS_ENSURE_SUCCESS(result, result);
michael@0:   NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
michael@0: 
michael@0:   nsCOMPtr<nsIContent> parentContent = do_QueryInterface(mParent);
michael@0:   NS_ENSURE_STATE(parentContent);
michael@0: 
michael@0:   result = selection->CollapseNative(parentContent,
michael@0:                                      parentContent->IndexOf(newContent) + 1);
michael@0:   NS_ASSERTION((NS_SUCCEEDED(result)), "selection could not be collapsed after insert.");
michael@0:   return result;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP CreateElementTxn::UndoTransaction(void)
michael@0: {
michael@0:   NS_ASSERTION(mEditor && mParent, "bad state");
michael@0:   NS_ENSURE_TRUE(mEditor && mParent, NS_ERROR_NOT_INITIALIZED);
michael@0: 
michael@0:   nsCOMPtr<nsIDOMNode> resultNode;
michael@0:   return mParent->RemoveChild(mNewNode, getter_AddRefs(resultNode));
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP CreateElementTxn::RedoTransaction(void)
michael@0: {
michael@0:   NS_ASSERTION(mEditor && mParent, "bad state");
michael@0:   NS_ENSURE_TRUE(mEditor && mParent, NS_ERROR_NOT_INITIALIZED);
michael@0: 
michael@0:   // first, reset mNewNode so it has no attributes or content
michael@0:   nsCOMPtr<nsIDOMCharacterData>nodeAsText = do_QueryInterface(mNewNode);
michael@0:   if (nodeAsText)
michael@0:   {
michael@0:     nodeAsText->SetData(EmptyString());
michael@0:   }
michael@0:   
michael@0:   // now, reinsert mNewNode
michael@0:   nsCOMPtr<nsIDOMNode> resultNode;
michael@0:   return mParent->InsertBefore(mNewNode, mRefNode, getter_AddRefs(resultNode));
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP CreateElementTxn::GetTxnDescription(nsAString& aString)
michael@0: {
michael@0:   aString.AssignLiteral("CreateElementTxn: ");
michael@0:   aString += mTag;
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP CreateElementTxn::GetNewNode(nsIDOMNode **aNewNode)
michael@0: {
michael@0:   NS_ENSURE_TRUE(aNewNode, NS_ERROR_NULL_POINTER);
michael@0:   NS_ENSURE_TRUE(mNewNode, NS_ERROR_NOT_INITIALIZED);
michael@0:   *aNewNode = mNewNode;
michael@0:   NS_ADDREF(*aNewNode);
michael@0:   return NS_OK;
michael@0: }