mirror of
https://github.com/mozilla/gecko-dev.git
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first cut at rules delegate for text editor, will change drastically in the next week or two
This commit is contained in:
buster%netscape.com
parent
7ddbcd287f
commit
80388f4d9e
207
editor/base/nsTextEditRules.cpp
Normal file
207
editor/base/nsTextEditRules.cpp
Normal file
@ -0,0 +1,207 @@
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL") you may not use this file except in
|
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* compliance with the NPL. You may obtain a copy of the NPL at
|
||||
* http://www.mozilla.org/NPL/
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||||
*
|
||||
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
|
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsTextEditRules.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMNode.h"
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#include "nsIDOMElement.h"
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#include "nsIDOMNodeList.h"
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#include "nsIDOMSelection.h"
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#include "nsIDOMRange.h"
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#include "nsIEnumerator.h"
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NS_IMPL_ADDREF(nsTextEditRules)
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NS_IMPL_RELEASE(nsTextEditRules)
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PRBool NodeIsType(nsIDOMNode *aNode, nsIAtom *aTag)
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{
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nsCOMPtr<nsIDOMElement>element;
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element = do_QueryInterface(aNode);
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if (element)
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{
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nsAutoString tag;
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element->GetTagName(tag);
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if (tag.Equals(aTag))
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{
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return PR_TRUE;
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}
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}
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return PR_FALSE;
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}
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nsTextEditRules::nsTextEditRules()
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{
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NS_INIT_REFCNT();
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}
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nsTextEditRules::~nsTextEditRules()
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{
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}
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NS_IMETHODIMP
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nsTextEditRules::Init(nsIEditor *aEditor, nsIEditRules *aNextRule)
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{
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// null aNextRule is ok
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if (!aEditor) { return NS_ERROR_NULL_POINTER; }
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mEditor = do_QueryInterface(aEditor);
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mNextRule = do_QueryInterface(aNextRule);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTextEditRules::WillInsertBreak(nsIDOMSelection *aSelection, PRBool *aCancel)
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{
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if (!aSelection || !aCancel) { return NS_ERROR_NULL_POINTER; }
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// initialize out param
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*aCancel = PR_FALSE;
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// any prep work would go here
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return NS_OK;
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}
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// XXX: this code is all experimental, and has no effect on the content model yet
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// the point here is to collapse adjacent BR's into P's
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NS_IMETHODIMP
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nsTextEditRules::DidInsertBreak(nsIDOMSelection *aSelection, nsresult aResult)
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{
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nsresult result;
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if (!aSelection) { return NS_ERROR_NULL_POINTER; }
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PRBool isCollapsed;
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aSelection->IsCollapsed(&isCollapsed);
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NS_ASSERTION(PR_TRUE==isCollapsed, "selection not collapsed after insert break.");
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// if the insert break resulted in consecutive BR tags,
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// collapse the two BR tags into a single P
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if (NS_SUCCEEDED(aResult)) // note we're checking aResult, the param that tells us if the insert break happened or not
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{
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nsCOMPtr<nsIEnumerator> enumerator;
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enumerator = do_QueryInterface(aSelection,&result);
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if (enumerator)
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{
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enumerator->First();
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nsISupports *currentItem;
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result = enumerator->CurrentItem(¤tItem);
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if ((NS_SUCCEEDED(result)) && currentItem)
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{
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result = NS_ERROR_UNEXPECTED;
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nsCOMPtr<nsIDOMRange> range( do_QueryInterface(currentItem) );
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if (range)
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{
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nsIAtom *brTag = NS_NewAtom("BR");
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nsCOMPtr<nsIDOMNode> startNode;
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result = range->GetStartParent(getter_AddRefs(startNode));
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if ((NS_SUCCEEDED(result)) && startNode)
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{
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PRInt32 offset;
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range->GetStartOffset(&offset);
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nsCOMPtr<nsIDOMNodeList>startNodeChildren;
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result = startNode->GetChildNodes(getter_AddRefs(startNodeChildren));
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if ((NS_SUCCEEDED(result)) && startNodeChildren)
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{
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nsCOMPtr<nsIDOMNode> selectedNode;
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result = startNodeChildren->Item(offset, getter_AddRefs(selectedNode));
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if ((NS_SUCCEEDED(result)) && selectedNode)
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{
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nsCOMPtr<nsIDOMNode> prevNode;
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result = selectedNode->GetPreviousSibling(getter_AddRefs(prevNode));
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if ((NS_SUCCEEDED(result)) && prevNode)
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{
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if (PR_TRUE==NodeIsType(prevNode, brTag))
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{ // the previous node is a BR, check it's siblings
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nsCOMPtr<nsIDOMNode> leftNode;
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result = prevNode->GetPreviousSibling(getter_AddRefs(leftNode));
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if ((NS_SUCCEEDED(result)) && leftNode)
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{
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if (PR_TRUE==NodeIsType(leftNode, brTag))
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{ // left sibling is also a BR, collapse
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printf("1\n");
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}
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else
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{
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if (PR_TRUE==NodeIsType(selectedNode, brTag))
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{ // right sibling is also a BR, collapse
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printf("2\n");
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}
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}
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}
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}
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}
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// now check the next node from selectedNode
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nsCOMPtr<nsIDOMNode> nextNode;
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result = selectedNode->GetNextSibling(getter_AddRefs(nextNode));
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if ((NS_SUCCEEDED(result)) && nextNode)
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{
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if (PR_TRUE==NodeIsType(nextNode, brTag))
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{ // the previous node is a BR, check it's siblings
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nsCOMPtr<nsIDOMNode> rightNode;
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result = prevNode->GetNextSibling(getter_AddRefs(rightNode));
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if ((NS_SUCCEEDED(result)) && rightNode)
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{
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if (PR_TRUE==NodeIsType(rightNode, brTag))
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{ // right sibling is also a BR, collapse
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printf("3\n");
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}
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else
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{
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if (PR_TRUE==NodeIsType(selectedNode, brTag))
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{ // left sibling is also a BR, collapse
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printf("4\n");
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}
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}
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}
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}
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}
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}
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}
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}
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NS_RELEASE(brTag);
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}
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}
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}
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}
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return result;
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}
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NS_IMETHODIMP
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nsTextEditRules::GetInsertBreakTag(nsIAtom **aTag)
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{
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if (!aTag) { return NS_ERROR_NULL_POINTER; }
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*aTag = NS_NewAtom("BR");
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTextEditRules::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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if (NULL == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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if (aIID.Equals(nsISupports::GetIID())) {
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*aInstancePtr = (void*)(nsISupports*)this;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(nsIEditRules::GetIID())) {
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*aInstancePtr = (void*)(nsIEditRules*)this;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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*aInstancePtr = 0;
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return NS_NOINTERFACE;
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}
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61
editor/base/nsTextEditRules.h
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61
editor/base/nsTextEditRules.h
Normal file
@ -0,0 +1,61 @@
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
|
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsTextEditRules_h__
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#define nsTextEditRules_h__
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#include "nsIEditRules.h"
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#include "nsIEditor.h"
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#include "nsCOMPtr.h"
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/** Object that encapsulates HTML text-specific editing rules.
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*
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* To be a good citizen, edit rules must live by these restrictions:
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* 1. All data manipulation is through the editor.
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* Content nodes in the document tree must <B>not</B> be manipulated directly.
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* Content nodes in document fragments that are not part of the document itself
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* may be manipulated at will. Operations on document fragments must <B>not</B>
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* go through the editor.
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* 2. Selection must not be explicitly set by the rule method.
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* Any manipulation of Selection must be done by the editor.
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*/
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class nsTextEditRules : public nsIEditRules
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{
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public:
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NS_DECL_ISUPPORTS
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nsTextEditRules();
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virtual ~nsTextEditRules();
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NS_IMETHOD Init(nsIEditor *aEditor, nsIEditRules *aNextRule);
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NS_IMETHOD WillInsertBreak(nsIDOMSelection *aSelection, PRBool *aCancel);
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NS_IMETHOD DidInsertBreak(nsIDOMSelection *aSelection, nsresult aResult);
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NS_IMETHOD GetInsertBreakTag(nsIAtom **aTag);
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protected:
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nsCOMPtr<nsIEditor> mEditor;
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nsCOMPtr<nsIEditRules> mNextRule;
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};
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#endif //nsTextEditRules_h__
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207
editor/libeditor/text/nsTextEditRules.cpp
Normal file
207
editor/libeditor/text/nsTextEditRules.cpp
Normal file
@ -0,0 +1,207 @@
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
|
||||
* Version 1.0 (the "NPL") you may not use this file except in
|
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* compliance with the NPL. You may obtain a copy of the NPL at
|
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* http://www.mozilla.org/NPL/
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||||
*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsTextEditRules.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMNode.h"
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#include "nsIDOMElement.h"
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#include "nsIDOMNodeList.h"
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#include "nsIDOMSelection.h"
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#include "nsIDOMRange.h"
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#include "nsIEnumerator.h"
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NS_IMPL_ADDREF(nsTextEditRules)
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NS_IMPL_RELEASE(nsTextEditRules)
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PRBool NodeIsType(nsIDOMNode *aNode, nsIAtom *aTag)
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{
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nsCOMPtr<nsIDOMElement>element;
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element = do_QueryInterface(aNode);
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if (element)
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{
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nsAutoString tag;
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element->GetTagName(tag);
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if (tag.Equals(aTag))
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{
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return PR_TRUE;
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}
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}
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return PR_FALSE;
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}
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nsTextEditRules::nsTextEditRules()
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{
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NS_INIT_REFCNT();
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}
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nsTextEditRules::~nsTextEditRules()
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{
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}
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NS_IMETHODIMP
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nsTextEditRules::Init(nsIEditor *aEditor, nsIEditRules *aNextRule)
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{
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// null aNextRule is ok
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if (!aEditor) { return NS_ERROR_NULL_POINTER; }
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mEditor = do_QueryInterface(aEditor);
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mNextRule = do_QueryInterface(aNextRule);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTextEditRules::WillInsertBreak(nsIDOMSelection *aSelection, PRBool *aCancel)
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{
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if (!aSelection || !aCancel) { return NS_ERROR_NULL_POINTER; }
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// initialize out param
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*aCancel = PR_FALSE;
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// any prep work would go here
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return NS_OK;
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}
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// XXX: this code is all experimental, and has no effect on the content model yet
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// the point here is to collapse adjacent BR's into P's
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NS_IMETHODIMP
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nsTextEditRules::DidInsertBreak(nsIDOMSelection *aSelection, nsresult aResult)
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{
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nsresult result;
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if (!aSelection) { return NS_ERROR_NULL_POINTER; }
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PRBool isCollapsed;
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aSelection->IsCollapsed(&isCollapsed);
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NS_ASSERTION(PR_TRUE==isCollapsed, "selection not collapsed after insert break.");
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// if the insert break resulted in consecutive BR tags,
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// collapse the two BR tags into a single P
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if (NS_SUCCEEDED(aResult)) // note we're checking aResult, the param that tells us if the insert break happened or not
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{
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nsCOMPtr<nsIEnumerator> enumerator;
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enumerator = do_QueryInterface(aSelection,&result);
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if (enumerator)
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{
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enumerator->First();
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nsISupports *currentItem;
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result = enumerator->CurrentItem(¤tItem);
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if ((NS_SUCCEEDED(result)) && currentItem)
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{
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result = NS_ERROR_UNEXPECTED;
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nsCOMPtr<nsIDOMRange> range( do_QueryInterface(currentItem) );
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if (range)
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{
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nsIAtom *brTag = NS_NewAtom("BR");
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nsCOMPtr<nsIDOMNode> startNode;
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result = range->GetStartParent(getter_AddRefs(startNode));
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if ((NS_SUCCEEDED(result)) && startNode)
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{
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PRInt32 offset;
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range->GetStartOffset(&offset);
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nsCOMPtr<nsIDOMNodeList>startNodeChildren;
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result = startNode->GetChildNodes(getter_AddRefs(startNodeChildren));
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if ((NS_SUCCEEDED(result)) && startNodeChildren)
|
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{
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nsCOMPtr<nsIDOMNode> selectedNode;
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result = startNodeChildren->Item(offset, getter_AddRefs(selectedNode));
|
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if ((NS_SUCCEEDED(result)) && selectedNode)
|
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{
|
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nsCOMPtr<nsIDOMNode> prevNode;
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result = selectedNode->GetPreviousSibling(getter_AddRefs(prevNode));
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if ((NS_SUCCEEDED(result)) && prevNode)
|
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{
|
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if (PR_TRUE==NodeIsType(prevNode, brTag))
|
||||
{ // the previous node is a BR, check it's siblings
|
||||
nsCOMPtr<nsIDOMNode> leftNode;
|
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result = prevNode->GetPreviousSibling(getter_AddRefs(leftNode));
|
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if ((NS_SUCCEEDED(result)) && leftNode)
|
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{
|
||||
if (PR_TRUE==NodeIsType(leftNode, brTag))
|
||||
{ // left sibling is also a BR, collapse
|
||||
printf("1\n");
|
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}
|
||||
else
|
||||
{
|
||||
if (PR_TRUE==NodeIsType(selectedNode, brTag))
|
||||
{ // right sibling is also a BR, collapse
|
||||
printf("2\n");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// now check the next node from selectedNode
|
||||
nsCOMPtr<nsIDOMNode> nextNode;
|
||||
result = selectedNode->GetNextSibling(getter_AddRefs(nextNode));
|
||||
if ((NS_SUCCEEDED(result)) && nextNode)
|
||||
{
|
||||
if (PR_TRUE==NodeIsType(nextNode, brTag))
|
||||
{ // the previous node is a BR, check it's siblings
|
||||
nsCOMPtr<nsIDOMNode> rightNode;
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result = prevNode->GetNextSibling(getter_AddRefs(rightNode));
|
||||
if ((NS_SUCCEEDED(result)) && rightNode)
|
||||
{
|
||||
if (PR_TRUE==NodeIsType(rightNode, brTag))
|
||||
{ // right sibling is also a BR, collapse
|
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printf("3\n");
|
||||
}
|
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else
|
||||
{
|
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if (PR_TRUE==NodeIsType(selectedNode, brTag))
|
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{ // left sibling is also a BR, collapse
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printf("4\n");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
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}
|
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}
|
||||
}
|
||||
}
|
||||
NS_RELEASE(brTag);
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||||
}
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||||
}
|
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}
|
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}
|
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return result;
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}
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|
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NS_IMETHODIMP
|
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nsTextEditRules::GetInsertBreakTag(nsIAtom **aTag)
|
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{
|
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if (!aTag) { return NS_ERROR_NULL_POINTER; }
|
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*aTag = NS_NewAtom("BR");
|
||||
return NS_OK;
|
||||
}
|
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|
||||
NS_IMETHODIMP
|
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nsTextEditRules::QueryInterface(REFNSIID aIID, void** aInstancePtr)
|
||||
{
|
||||
if (NULL == aInstancePtr) {
|
||||
return NS_ERROR_NULL_POINTER;
|
||||
}
|
||||
if (aIID.Equals(nsISupports::GetIID())) {
|
||||
*aInstancePtr = (void*)(nsISupports*)this;
|
||||
NS_ADDREF_THIS();
|
||||
return NS_OK;
|
||||
}
|
||||
if (aIID.Equals(nsIEditRules::GetIID())) {
|
||||
*aInstancePtr = (void*)(nsIEditRules*)this;
|
||||
NS_ADDREF_THIS();
|
||||
return NS_OK;
|
||||
}
|
||||
*aInstancePtr = 0;
|
||||
return NS_NOINTERFACE;
|
||||
}
|
||||
|
||||
|
||||
|
||||
61
editor/libeditor/text/nsTextEditRules.h
Normal file
61
editor/libeditor/text/nsTextEditRules.h
Normal file
@ -0,0 +1,61 @@
|
||||
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
||||
*
|
||||
* The contents of this file are subject to the Netscape Public License
|
||||
* Version 1.0 (the "NPL"); you may not use this file except in
|
||||
* compliance with the NPL. You may obtain a copy of the NPL at
|
||||
* http://www.mozilla.org/NPL/
|
||||
*
|
||||
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
||||
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
||||
* for the specific language governing rights and limitations under the
|
||||
* NPL.
|
||||
*
|
||||
* The Initial Developer of this code under the NPL is Netscape
|
||||
* Communications Corporation. Portions created by Netscape are
|
||||
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
||||
* Reserved.
|
||||
*/
|
||||
|
||||
#ifndef nsTextEditRules_h__
|
||||
#define nsTextEditRules_h__
|
||||
|
||||
#include "nsIEditRules.h"
|
||||
#include "nsIEditor.h"
|
||||
#include "nsCOMPtr.h"
|
||||
|
||||
|
||||
/** Object that encapsulates HTML text-specific editing rules.
|
||||
*
|
||||
* To be a good citizen, edit rules must live by these restrictions:
|
||||
* 1. All data manipulation is through the editor.
|
||||
* Content nodes in the document tree must <B>not</B> be manipulated directly.
|
||||
* Content nodes in document fragments that are not part of the document itself
|
||||
* may be manipulated at will. Operations on document fragments must <B>not</B>
|
||||
* go through the editor.
|
||||
* 2. Selection must not be explicitly set by the rule method.
|
||||
* Any manipulation of Selection must be done by the editor.
|
||||
*/
|
||||
class nsTextEditRules : public nsIEditRules
|
||||
{
|
||||
public:
|
||||
|
||||
NS_DECL_ISUPPORTS
|
||||
|
||||
nsTextEditRules();
|
||||
virtual ~nsTextEditRules();
|
||||
|
||||
NS_IMETHOD Init(nsIEditor *aEditor, nsIEditRules *aNextRule);
|
||||
|
||||
NS_IMETHOD WillInsertBreak(nsIDOMSelection *aSelection, PRBool *aCancel);
|
||||
NS_IMETHOD DidInsertBreak(nsIDOMSelection *aSelection, nsresult aResult);
|
||||
NS_IMETHOD GetInsertBreakTag(nsIAtom **aTag);
|
||||
|
||||
protected:
|
||||
|
||||
nsCOMPtr<nsIEditor> mEditor;
|
||||
nsCOMPtr<nsIEditRules> mNextRule;
|
||||
|
||||
};
|
||||
|
||||
#endif //nsTextEditRules_h__
|
||||
|
||||
Loading…
Reference in New Issue
Block a user