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gecko-dev/editor/base/nsTextEditRules.cpp

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/* -*- 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.
*/
#include "nsTextEditRules.h"
#include "nsTextEditor.h"
#include "nsEditor.h"
#include "PlaceholderTxn.h"
#include "InsertTextTxn.h"
#include "nsCOMPtr.h"
#include "nsIDOMNode.h"
#include "nsIDOMElement.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMSelection.h"
#include "nsIDOMRange.h"
#include "nsIDOMCharacterData.h"
#include "nsIContent.h"
#include "nsIContentIterator.h"
#include "nsIEnumerator.h"
#include "nsLayoutCID.h"
#include "nsIEditProperty.h"
static NS_DEFINE_CID(kCContentIteratorCID, NS_CONTENTITERATOR_CID);
#define CANCEL_OPERATION_IF_READONLY_OR_DISABLED \
if (mFlags & TEXT_EDITOR_FLAG_READONLY || mFlags & TEXT_EDITOR_FLAG_DISABLED) \
{ \
*aCancel = PR_TRUE; \
return NS_OK; \
};
/********************************************************
* Constructor/Destructor
********************************************************/
nsTextEditRules::nsTextEditRules()
{
mEditor = nsnull;
mFlags=0;
}
nsTextEditRules::~nsTextEditRules()
{
// do NOT delete mEditor here. We do not hold a ref count to mEditor. mEditor owns our lifespan.
}
/********************************************************
* Public methods
********************************************************/
NS_IMETHODIMP
nsTextEditRules::Init(nsIEditor *aEditor)
{
if (!aEditor) { return NS_ERROR_NULL_POINTER; }
mEditor = (nsTextEditor*)aEditor; // we hold a non-refcounted reference back to our editor
nsCOMPtr<nsIDOMSelection> selection;
mEditor->GetSelection(getter_AddRefs(selection));
NS_ASSERTION(selection, "editor cannot get selection");
nsresult result = CreateBogusNodeIfNeeded(selection); // this method handles null selection, which should never happen anyway
return result;
}
NS_IMETHODIMP
nsTextEditRules::GetFlags(PRUint32 *aFlags)
{
if (!aFlags) { return NS_ERROR_NULL_POINTER; }
*aFlags = mFlags;
return NS_OK;
}
NS_IMETHODIMP
nsTextEditRules::SetFlags(PRUint32 aFlags)
{
mFlags = aFlags;
return NS_OK;
}
NS_IMETHODIMP
nsTextEditRules::WillDoAction(nsIDOMSelection *aSelection,
nsRulesInfo *aInfo, PRBool *aCancel)
{
if (!aSelection || !aInfo || !aCancel) { return NS_ERROR_NULL_POINTER; }
*aCancel = PR_FALSE;
// no matter what we are doing, sanity check the selection and force it
// to be inside the PRE element
// XXX - don't know the right way to do this test:
// if ( this is the kind of editor that has a mandatory PRE tag )
// {
// nsresult res = PinSelectionInPRE(aSelection);
// if (NS_FAILED(res)) return res;
// }
// my kingdom for dynamic cast
nsTextRulesInfo *info = NS_STATIC_CAST(nsTextRulesInfo*, aInfo);
switch (info->action)
{
case kInsertBreak:
return WillInsertBreak(aSelection, aCancel);
case kInsertText:
return WillInsertText(aSelection,
aCancel,
info->placeTxn,
info->inString,
info->outString,
info->typeInState,
info->maxLength);
case kDeleteSelection:
return WillDeleteSelection(aSelection, info->collapsedAction, aCancel);
case kUndo:
return WillUndo(aSelection, aCancel);
case kRedo:
return WillRedo(aSelection, aCancel);
case kSetTextProperty:
return WillSetTextProperty(aSelection, aCancel);
case kRemoveTextProperty:
return WillRemoveTextProperty(aSelection, aCancel);
case kOutputText:
return WillOutputText(aSelection,
info->outString,
aCancel);
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsTextEditRules::DidDoAction(nsIDOMSelection *aSelection,
nsRulesInfo *aInfo, nsresult aResult)
{
if (!aSelection || !aInfo)
return NS_ERROR_NULL_POINTER;
// my kingdom for dynamic cast
nsTextRulesInfo *info = NS_STATIC_CAST(nsTextRulesInfo*, aInfo);
switch (info->action)
{
case kInsertBreak:
return DidInsertBreak(aSelection, aResult);
case kInsertText:
return DidInsertText(aSelection, aResult);
case kDeleteSelection:
return DidDeleteSelection(aSelection, info->collapsedAction, aResult);
case kUndo:
return DidUndo(aSelection, aResult);
case kRedo:
return DidRedo(aSelection, aResult);
case kSetTextProperty:
return DidSetTextProperty(aSelection, aResult);
case kRemoveTextProperty:
return DidRemoveTextProperty(aSelection, aResult);
case kOutputText:
return DidOutputText(aSelection, aResult);
}
return NS_ERROR_FAILURE;
}
/********************************************************
* Protected methods
********************************************************/
nsresult
nsTextEditRules::WillInsert(nsIDOMSelection *aSelection, PRBool *aCancel)
{
if (!aSelection || !aCancel) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
// check for the magic content node and delete it if it exists
if (mBogusNode)
{
mEditor->DeleteNode(mBogusNode);
mBogusNode = do_QueryInterface(nsnull);
// there is no longer any legit selection, so clear it.
aSelection->ClearSelection();
}
return NS_OK;
}
nsresult
nsTextEditRules::DidInsert(nsIDOMSelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::WillInsertBreak(nsIDOMSelection *aSelection, PRBool *aCancel)
{
if (!aSelection || !aCancel) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
if (mFlags & TEXT_EDITOR_FLAG_SINGLELINE) {
*aCancel = PR_TRUE;
}
else {
*aCancel = PR_FALSE;
}
return NS_OK;
}
nsresult
nsTextEditRules::DidInsertBreak(nsIDOMSelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::WillInsertText(nsIDOMSelection *aSelection,
PRBool *aCancel,
PlaceholderTxn **aTxn,
const nsString *aInString,
nsString *aOutString,
TypeInState aTypeInState,
PRInt32 aMaxLength)
{
if (!aSelection || !aCancel || !aInString || !aOutString) {return NS_ERROR_NULL_POINTER;}
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
nsresult result;
nsString inString = *aInString; // we might want to mutate the input
// before setting the output, do that in a local var
if ((-1 != aMaxLength) && (mFlags&TEXT_EDITOR_FLAG_PLAINTEXT))
{
// get the current text length
// get the length of inString
// if len(doc) is at or over max, cancel the insert
// if l(doc) + l(input) > max, set aOutString to subset of inString so length = max
PRInt32 docLength;
result = mEditor->GetDocumentLength(&docLength);
if (NS_SUCCEEDED(result))
{
if (docLength >= aMaxLength)
{
*aOutString = "";
*aCancel = PR_TRUE;
return result;
}
else
{
PRInt32 inCount = inString.Length();
if ((inCount+docLength)>aMaxLength)
{
inString.Truncate(aMaxLength-docLength);
}
}
}
}
// initialize out params
*aCancel = PR_FALSE;
if (mFlags&TEXT_EDITOR_FLAG_PASSWORD)
{
// manage the password buffer
PRInt32 start, end;
result = mEditor->GetTextSelectionOffsets(aSelection, start, end);
NS_ASSERTION((NS_SUCCEEDED(result)), "getTextSelectionOffsets failed!");
mPasswordText.Insert(inString, start);
char *password = mPasswordText.ToNewCString();
printf("mPasswordText is %s\n", password);
delete [] password;
// change the output to '*' only
PRInt32 length = inString.Length();
PRInt32 i;
for (i=0; i<length; i++)
*aOutString += '*';
}
else
{
*aOutString = inString;
}
if (mBogusNode || (PR_TRUE==aTypeInState.IsAnySet()))
{
result = TransactionFactory::GetNewTransaction(PlaceholderTxn::GetCID(), (EditTxn **)aTxn);
if (NS_FAILED(result)) { return result; }
if (!*aTxn) { return NS_ERROR_NULL_POINTER; }
(*aTxn)->SetName(InsertTextTxn::gInsertTextTxnName);
mEditor->Do(*aTxn);
}
result = WillInsert(aSelection, aCancel);
if (NS_SUCCEEDED(result) && (PR_FALSE==*aCancel))
{
if (PR_TRUE==aTypeInState.IsAnySet())
{ // for every property that is set, insert a new inline style node
result = CreateStyleForInsertText(aSelection, aTypeInState);
}
}
return result;
}
nsresult
nsTextEditRules::DidInsertText(nsIDOMSelection *aSelection,
nsresult aResult)
{
return DidInsert(aSelection, aResult);
}
nsresult
nsTextEditRules::CreateStyleForInsertText(nsIDOMSelection *aSelection, TypeInState &aTypeInState)
{
// private method, we know aSelection is not null, and that it is collapsed
NS_ASSERTION(nsnull!=aSelection, "bad selection");
// We know at least one style is set and we're about to insert at least one character.
// If the selection is in a text node, split the node (even if we're at the beginning or end)
// then put the text node inside new inline style parents.
// Otherwise, create the text node and the new inline style parents.
nsCOMPtr<nsIDOMNode>anchor;
PRInt32 offset;
nsresult result = aSelection->GetAnchorNode( getter_AddRefs(anchor));
if (NS_SUCCEEDED(result) && NS_SUCCEEDED(aSelection->GetAnchorOffset(&offset)) && anchor)
{
nsCOMPtr<nsIDOMCharacterData>anchorAsText;
anchorAsText = do_QueryInterface(anchor);
if (anchorAsText)
{
nsCOMPtr<nsIDOMNode>newTextNode;
// create an empty text node by splitting the selected text node according to offset
if (0==offset)
{
result = mEditor->SplitNode(anchorAsText, offset, getter_AddRefs(newTextNode));
}
else
{
PRUint32 length;
anchorAsText->GetLength(&length);
if (length==(PRUint32)offset)
{
// newTextNode will be the left node
result = mEditor->SplitNode(anchorAsText, offset, getter_AddRefs(newTextNode));
// but we want the right node in this case
newTextNode = do_QueryInterface(anchor);
}
else
{
// splitting anchor twice sets newTextNode as an empty text node between
// two halves of the original text node
result = mEditor->SplitNode(anchorAsText, offset, getter_AddRefs(newTextNode));
result = mEditor->SplitNode(anchorAsText, 0, getter_AddRefs(newTextNode));
}
}
// now we have the new text node we are going to insert into.
// create style nodes or move it up the content hierarchy as needed.
if ((NS_SUCCEEDED(result)) && newTextNode)
{
nsCOMPtr<nsIDOMNode>newStyleNode;
if (aTypeInState.IsSet(NS_TYPEINSTATE_BOLD))
{
if (PR_TRUE==aTypeInState.GetBold()) {
result = InsertStyleNode(newTextNode, nsIEditProperty::b, aSelection, getter_AddRefs(newStyleNode));
}
else {
printf("not yet implemented, make not bold in a bold context\n");
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_ITALIC))
{
if (PR_TRUE==aTypeInState.GetItalic()) {
result = InsertStyleNode(newTextNode, nsIEditProperty::i, aSelection, getter_AddRefs(newStyleNode));
}
else
{
printf("not yet implemented, make not italic in a italic context\n");
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_UNDERLINE))
{
if (PR_TRUE==aTypeInState.GetUnderline()) {
result = InsertStyleNode(newTextNode, nsIEditProperty::u, aSelection, getter_AddRefs(newStyleNode));
}
else
{
printf("not yet implemented, make not underline in an underline context\n");
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_FONTCOLOR))
{
nsAutoString value;
aTypeInState.GetFontColor(value);
nsAutoString attr;
nsIEditProperty::color->ToString(attr);
result = CreateFontStyleForInsertText(newTextNode, attr, value, aSelection);
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_FONTFACE))
{
nsAutoString value;
aTypeInState.GetFontFace(value);
nsAutoString attr;
nsIEditProperty::face->ToString(attr);
result = CreateFontStyleForInsertText(newTextNode, attr, value, aSelection);
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_FONTSIZE))
{
nsAutoString value;
aTypeInState.GetFontSize(value);
nsAutoString attr;
nsIEditProperty::size->ToString(attr);
result = CreateFontStyleForInsertText(newTextNode, attr, value, aSelection);
}
}
}
else
{
printf("not yet implemented. selection is not text.\n");
}
}
else // we have no selection, so insert a style tag in the body
{
nsCOMPtr<nsIDOMDocument>doc;
mEditor->GetDocument(getter_AddRefs(doc));
nsCOMPtr<nsIDOMNodeList>nodeList;
nsAutoString bodyTag = "body";
result = doc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList));
if ((NS_SUCCEEDED(result)) && nodeList)
{
PRUint32 count;
nodeList->GetLength(&count);
NS_ASSERTION(1==count, "there is not exactly 1 body in the document!");
nsCOMPtr<nsIDOMNode>bodyNode;
result = nodeList->Item(0, getter_AddRefs(bodyNode));
if ((NS_SUCCEEDED(result)) && bodyNode)
{ // now we've got the body tag. insert the style tag
if (aTypeInState.IsSet(NS_TYPEINSTATE_BOLD))
{
if (PR_TRUE==aTypeInState.GetBold()) {
InsertStyleAndNewTextNode(bodyNode, nsIEditProperty::b, aSelection);
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_ITALIC))
{
if (PR_TRUE==aTypeInState.GetItalic()) {
InsertStyleAndNewTextNode(bodyNode, nsIEditProperty::i, aSelection);
}
}
if (aTypeInState.IsSet(NS_TYPEINSTATE_UNDERLINE))
{
if (PR_TRUE==aTypeInState.GetUnderline()) {
InsertStyleAndNewTextNode(bodyNode, nsIEditProperty::u, aSelection);
}
}
}
}
}
return result;
}
nsresult
nsTextEditRules::CreateFontStyleForInsertText(nsIDOMNode *aNewTextNode,
const nsString &aAttr,
const nsString &aValue,
nsIDOMSelection *aSelection)
{
nsresult result = NS_OK;
nsCOMPtr<nsIDOMNode>newStyleNode;
if (0!=aValue.Length())
{
result = InsertStyleNode(aNewTextNode, nsIEditProperty::font, aSelection, getter_AddRefs(newStyleNode));
if (NS_SUCCEEDED(result) && newStyleNode)
{
nsCOMPtr<nsIDOMElement>element = do_QueryInterface(newStyleNode);
if (element) {
result = mEditor->SetAttribute(element, aAttr, aValue);
}
}
}
else
{
printf("not yet implemented, undo font in an font context\n");
}
return result;
}
nsresult
nsTextEditRules::InsertStyleNode(nsIDOMNode *aNode,
nsIAtom *aTag,
nsIDOMSelection *aSelection,
nsIDOMNode **aNewNode)
{
NS_ASSERTION(aNode && aTag, "bad args");
if (!aNode || !aTag) { return NS_ERROR_NULL_POINTER; }
nsresult result;
nsCOMPtr<nsIDOMNode>parent;
aNode->GetParentNode(getter_AddRefs(parent));
PRInt32 offsetInParent;
nsEditor::GetChildOffset(aNode, parent, offsetInParent);
nsAutoString tag;
aTag->ToString(tag);
result = mEditor->CreateNode(tag, parent, offsetInParent, aNewNode);
if ((NS_SUCCEEDED(result)) && *aNewNode)
{
result = mEditor->DeleteNode(aNode);
if (NS_SUCCEEDED(result))
{
result = mEditor->InsertNode(aNode, *aNewNode, 0);
if (NS_SUCCEEDED(result)) {
if (aSelection) {
aSelection->Collapse(aNode, 0);
}
}
}
}
return result;
}
nsresult
nsTextEditRules::InsertStyleAndNewTextNode(nsIDOMNode *aParentNode, nsIAtom *aTag, nsIDOMSelection *aSelection)
{
NS_ASSERTION(aParentNode && aTag, "bad args");
if (!aParentNode || !aTag) { return NS_ERROR_NULL_POINTER; }
nsresult result;
// if the selection already points to a text node, just call InsertStyleNode()
if (aSelection)
{
nsCOMPtr<nsIDOMNode>anchor;
PRInt32 offset;
result = aSelection->GetAnchorNode(getter_AddRefs(anchor));
if (NS_SUCCEEDED(result) && NS_SUCCEEDED(aSelection->GetAnchorOffset(&offset)) && anchor)
{
nsCOMPtr<nsIDOMCharacterData>anchorAsText;
anchorAsText = do_QueryInterface(anchor);
if (anchorAsText)
{
nsCOMPtr<nsIDOMNode> newStyleNode;
result = InsertStyleNode(anchor, aTag, aSelection, getter_AddRefs(newStyleNode));
return result;
}
}
}
// if we get here, there is no selected text node so we create one.
nsAutoString tag;
aTag->ToString(tag);
nsCOMPtr<nsIDOMNode>newStyleNode;
nsCOMPtr<nsIDOMNode>newTextNode;
result = mEditor->CreateNode(tag, aParentNode, 0, getter_AddRefs(newStyleNode));
if (NS_SUCCEEDED(result))
{
result = mEditor->CreateNode(nsIEditor::GetTextNodeTag(), newStyleNode, 0, getter_AddRefs(newTextNode));
if (NS_SUCCEEDED(result))
{
if (aSelection) {
aSelection->Collapse(newTextNode, 0);
}
}
}
return result;
}
nsresult
nsTextEditRules::WillSetTextProperty(nsIDOMSelection *aSelection, PRBool *aCancel)
{
nsresult result = NS_OK;
// XXX: should probably return a success value other than NS_OK that means "not allowed"
if (TEXT_EDITOR_FLAG_PLAINTEXT & mFlags) {
*aCancel = PR_TRUE;
}
return result;
}
nsresult
nsTextEditRules::DidSetTextProperty(nsIDOMSelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::WillRemoveTextProperty(nsIDOMSelection *aSelection, PRBool *aCancel)
{
nsresult result = NS_OK;
// XXX: should probably return a success value other than NS_OK that means "not allowed"
if (TEXT_EDITOR_FLAG_PLAINTEXT & mFlags) {
*aCancel = PR_TRUE;
}
return result;
}
nsresult
nsTextEditRules::DidRemoveTextProperty(nsIDOMSelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::WillDeleteSelection(nsIDOMSelection *aSelection,
nsIEditor::ECollapsedSelectionAction aCollapsedAction,
PRBool *aCancel)
{
if (!aSelection || !aCancel) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
// if there is only bogus content, cancel the operation
if (mBogusNode) {
*aCancel = PR_TRUE;
return NS_OK;
}
if (mFlags&TEXT_EDITOR_FLAG_PASSWORD)
{
// manage the password buffer
PRInt32 start, end;
mEditor->GetTextSelectionOffsets(aSelection, start, end);
if (end==start)
{ // collapsed selection
if (nsIEditor::eDeleteLeft==aCollapsedAction && 0<start) { // del back
mPasswordText.Cut(start-1, 1);
}
else if (nsIEditor::eDeleteRight==aCollapsedAction) { // del forward
mPasswordText.Cut(start, 1);
}
// otherwise nothing to do for this collapsed selection
}
else { // extended selection
mPasswordText.Cut(start, end-start);
}
char *password = mPasswordText.ToNewCString();
printf("mPasswordText is %s\n", password);
delete [] password;
}
return NS_OK;
}
// if the document is empty, insert a bogus text node with a &nbsp;
// if we ended up with consecutive text nodes, merge them
nsresult
nsTextEditRules::DidDeleteSelection(nsIDOMSelection *aSelection,
nsIEditor::ECollapsedSelectionAction aCollapsedAction,
nsresult aResult)
{
nsresult result = aResult; // if aResult is an error, we just return it
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
PRBool isCollapsed;
aSelection->GetIsCollapsed(&isCollapsed);
NS_ASSERTION(PR_TRUE==isCollapsed, "selection not collapsed after delete selection.");
// if the delete selection resulted in no content
// insert a special bogus text node with a &nbsp; character in it.
if (NS_SUCCEEDED(result)) // only do this work if DeleteSelection completed successfully
{
result = CreateBogusNodeIfNeeded(aSelection);
// if we don't have an empty document, check the selection to see if any collapsing is necessary
if (!mBogusNode)
{
nsCOMPtr<nsIDOMNode>anchor;
PRInt32 offset;
result = aSelection->GetAnchorNode(getter_AddRefs(anchor));
if (NS_SUCCEEDED(result) && NS_SUCCEEDED(aSelection->GetAnchorOffset(&offset)) && anchor)
{
nsCOMPtr<nsIDOMNodeList> anchorChildren;
result = anchor->GetChildNodes(getter_AddRefs(anchorChildren));
nsCOMPtr<nsIDOMNode> selectedNode;
if ((NS_SUCCEEDED(result)) && anchorChildren) {
result = anchorChildren->Item(offset, getter_AddRefs(selectedNode));
}
else {
selectedNode = do_QueryInterface(anchor);
}
if ((NS_SUCCEEDED(result)) && selectedNode)
{
nsCOMPtr<nsIDOMCharacterData>selectedNodeAsText;
selectedNodeAsText = do_QueryInterface(selectedNode);
if (selectedNodeAsText)
{
nsCOMPtr<nsIDOMNode> siblingNode;
selectedNode->GetPreviousSibling(getter_AddRefs(siblingNode));
if (siblingNode)
{
nsCOMPtr<nsIDOMCharacterData>siblingNodeAsText;
siblingNodeAsText = do_QueryInterface(siblingNode);
if (siblingNodeAsText)
{
PRUint32 siblingLength; // the length of siblingNode before the join
siblingNodeAsText->GetLength(&siblingLength);
nsCOMPtr<nsIDOMNode> parentNode;
selectedNode->GetParentNode(getter_AddRefs(parentNode));
result = mEditor->JoinNodes(siblingNode, selectedNode, parentNode);
// selectedNode will remain after the join, siblingNode is removed
}
}
selectedNode->GetNextSibling(getter_AddRefs(siblingNode));
if (siblingNode)
{
nsCOMPtr<nsIDOMCharacterData>siblingNodeAsText;
siblingNodeAsText = do_QueryInterface(siblingNode);
if (siblingNodeAsText)
{
PRUint32 selectedNodeLength; // the length of siblingNode before the join
selectedNodeAsText->GetLength(&selectedNodeLength);
nsCOMPtr<nsIDOMNode> parentNode;
selectedNode->GetParentNode(getter_AddRefs(parentNode));
result = mEditor->JoinNodes(selectedNode, siblingNode, parentNode);
// selectedNode will remain after the join, siblingNode is removed
// set selection
aSelection->Collapse(siblingNode, selectedNodeLength);
}
}
}
}
}
}
}
return result;
}
nsresult
nsTextEditRules::WillUndo(nsIDOMSelection *aSelection, PRBool *aCancel)
{
if (!aSelection || !aCancel) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
return NS_OK;
}
/* the idea here is to see if the magic empty node has suddenly reappeared as the result of the undo.
* if it has, set our state so we remember it.
* There is a tradeoff between doing here and at redo, or doing it everywhere else that might care.
* Since undo and redo are relatively rare, it makes sense to take the (small) performance hit here.
*/
nsresult
nsTextEditRules:: DidUndo(nsIDOMSelection *aSelection, nsresult aResult)
{
nsresult result = aResult; // if aResult is an error, we return it.
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
if (NS_SUCCEEDED(result))
{
if (mBogusNode) {
mBogusNode = do_QueryInterface(nsnull);
}
else
{
nsCOMPtr<nsIDOMNode>node;
PRInt32 offset;
result = aSelection->GetAnchorNode(getter_AddRefs(node));
if (NS_SUCCEEDED(result) && NS_SUCCEEDED(aSelection->GetAnchorOffset(&offset)) && node)
{
nsCOMPtr<nsIDOMElement>element;
element = do_QueryInterface(node);
if (element)
{
nsAutoString att(nsEditor::kMOZEditorBogusNodeAttr);
nsAutoString val;
(void)element->GetAttribute(att, val);
if (val.Equals(nsEditor::kMOZEditorBogusNodeValue)) {
mBogusNode = do_QueryInterface(element);
}
}
nsCOMPtr<nsIDOMNode> temp;
result = node->GetParentNode(getter_AddRefs(temp));
node = do_QueryInterface(temp);
}
}
}
return result;
}
nsresult
nsTextEditRules::WillRedo(nsIDOMSelection *aSelection, PRBool *aCancel)
{
if (!aSelection || !aCancel) { return NS_ERROR_NULL_POINTER; }
CANCEL_OPERATION_IF_READONLY_OR_DISABLED
// initialize out param
*aCancel = PR_FALSE;
return NS_OK;
}
nsresult
nsTextEditRules::DidRedo(nsIDOMSelection *aSelection, nsresult aResult)
{
nsresult result = aResult; // if aResult is an error, we return it.
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
if (NS_SUCCEEDED(result))
{
if (mBogusNode) {
mBogusNode = do_QueryInterface(nsnull);
}
else
{
nsCOMPtr<nsIDOMNode>node;
PRInt32 offset;
result = aSelection->GetAnchorNode(getter_AddRefs(node));
if (NS_SUCCEEDED(result) && NS_SUCCEEDED(aSelection->GetAnchorOffset(&offset)) && node)
{
nsCOMPtr<nsIDOMElement>element;
element = do_QueryInterface(node);
if (element)
{
nsAutoString att(nsEditor::kMOZEditorBogusNodeAttr);
nsAutoString val;
(void)element->GetAttribute(att, val);
if (val.Equals(nsEditor::kMOZEditorBogusNodeValue)) {
mBogusNode = do_QueryInterface(element);
}
}
nsCOMPtr<nsIDOMNode> temp;
result = node->GetParentNode(getter_AddRefs(temp));
node = do_QueryInterface(temp);
}
}
}
return result;
}
nsresult
nsTextEditRules::WillOutputText(nsIDOMSelection *aSelection,
nsString *aOutString,
PRBool *aCancel)
{
// null selection ok
if (!aOutString || !aCancel) { return NS_ERROR_NULL_POINTER; }
// initialize out param
*aCancel = PR_FALSE;
if (mFlags&TEXT_EDITOR_FLAG_PASSWORD)
{
*aOutString = mPasswordText;
*aCancel = PR_TRUE;
}
return NS_OK;
}
nsresult
nsTextEditRules::DidOutputText(nsIDOMSelection *aSelection, nsresult aResult)
{
return NS_OK;
}
nsresult
nsTextEditRules::CreateBogusNodeIfNeeded(nsIDOMSelection *aSelection)
{
if (!aSelection) { return NS_ERROR_NULL_POINTER; }
if (!mEditor) { return NS_ERROR_NULL_POINTER; }
nsCOMPtr<nsIDOMDocument>doc;
mEditor->GetDocument(getter_AddRefs(doc));
nsCOMPtr<nsIDOMNodeList>nodeList;
nsAutoString bodyTag = "body";
nsresult result = doc->GetElementsByTagName(bodyTag, getter_AddRefs(nodeList));
if ((NS_SUCCEEDED(result)) && nodeList)
{
PRUint32 count;
nodeList->GetLength(&count);
NS_ASSERTION(1==count, "there is not exactly 1 body in the document!");
nsCOMPtr<nsIDOMNode>bodyNode;
result = nodeList->Item(0, getter_AddRefs(bodyNode));
if ((NS_SUCCEEDED(result)) && bodyNode)
{ // now we've got the body tag.
// iterate the body tag, looking for editable content
// if no editable content is found, insert the bogus node
PRBool needsBogusContent=PR_TRUE;
nsCOMPtr<nsIDOMNode>bodyChild;
result = bodyNode->GetFirstChild(getter_AddRefs(bodyChild));
while ((NS_SUCCEEDED(result)) && bodyChild)
{
if (PR_TRUE==mEditor->IsEditable(bodyChild))
{
needsBogusContent = PR_FALSE;
break;
}
nsCOMPtr<nsIDOMNode>temp;
bodyChild->GetNextSibling(getter_AddRefs(temp));
bodyChild = do_QueryInterface(temp);
}
if (PR_TRUE==needsBogusContent)
{
// set mBogusNode to be the newly created <P>
result = mEditor->CreateNode(nsAutoString("P"), bodyNode, 0,
getter_AddRefs(mBogusNode));
if ((NS_SUCCEEDED(result)) && mBogusNode)
{
nsCOMPtr<nsIDOMNode>newTNode;
result = mEditor->CreateNode(nsIEditor::GetTextNodeTag(), mBogusNode, 0,
getter_AddRefs(newTNode));
if ((NS_SUCCEEDED(result)) && newTNode)
{
nsCOMPtr<nsIDOMCharacterData>newNodeAsText;
newNodeAsText = do_QueryInterface(newTNode);
if (newNodeAsText)
{
nsAutoString data;
data += 160;
newNodeAsText->SetData(data);
aSelection->Collapse(newTNode, 0);
}
}
// make sure we know the PNode is bogus
nsCOMPtr<nsIDOMElement>newPElement;
newPElement = do_QueryInterface(mBogusNode);
if (newPElement)
{
nsAutoString att(nsEditor::kMOZEditorBogusNodeAttr);
nsAutoString val(nsEditor::kMOZEditorBogusNodeValue);
newPElement->SetAttribute(att, val);
}
}
}
}
}
return result;
}
static NS_DEFINE_IID(kRangeCID, NS_RANGE_CID);
nsresult
nsTextEditRules::PinSelectionInPRE(nsIDOMSelection *aSelection)
{
if (!aSelection)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMElement> preElement = mEditor->FindPreElement();
if (!preElement)
return NS_ERROR_NULL_POINTER;
nsCOMPtr<nsIDOMNode> preNode = do_QueryInterface(preElement);
nsCOMPtr<nsIDOMRange> preRange;
nsresult res = nsComponentManager::CreateInstance(kRangeCID, nsnull,
nsIDOMRange::GetIID(),
getter_AddRefs(preRange));
if (NS_FAILED(res)) return res;
res = preRange->SelectNodeContents(preNode);
if (NS_FAILED(res)) return res;
PRInt32 len;
nsCOMPtr<nsIDOMRange> selectionRange;
nsCOMPtr<nsIDOMRange> pinRange;
res = preRange->GetEndOffset(&len);
if (NS_FAILED(res)) return res;
// there should only be one selection range in text docs
res = aSelection->GetRangeAt(0, getter_AddRefs(selectionRange));
if (NS_FAILED(res)) return res;
res = selectionRange->Clone(getter_AddRefs(pinRange));
if (NS_FAILED(res)) return res;
PRInt32 order;
PRBool needToPin = PR_FALSE;
res = preRange->CompareEndPoints(nsIDOMRange::END_TO_START, selectionRange, &order);
if (order > 0)
{
// start of range is after end of pre node; pin to end
res = pinRange->SetStart(preNode, len);
if (NS_FAILED(res)) return res;
needToPin = PR_TRUE;
}
res = preRange->CompareEndPoints(nsIDOMRange::START_TO_END, selectionRange, &order);
if (order < 0)
{
// end of range is before start of pre node; pin to start
res = pinRange->SetEnd(preNode, 0);
if (NS_FAILED(res)) return res;
needToPin = PR_TRUE;
}
res = preRange->CompareEndPoints(nsIDOMRange::START_TO_START, selectionRange, &order);
if (order < 0)
{
// start of range is before start of pre node; pin to start
res = pinRange->SetStart(preNode, 0);
if (NS_FAILED(res)) return res;
needToPin = PR_TRUE;
}
res = preRange->CompareEndPoints(nsIDOMRange::END_TO_END, selectionRange, &order);
if (order > 0)
{
// end of range is after end of pre node; pin to end
res = pinRange->SetEnd(preNode, len);
if (NS_FAILED(res)) return res;
needToPin = PR_TRUE;
}
if (needToPin)
{
nsCOMPtr<nsIDOMNode> startNode;
nsCOMPtr<nsIDOMNode> endNode;
PRInt32 startOffset, endOffset;
res = pinRange->GetStartParent(getter_AddRefs(startNode));
if (NS_FAILED(res)) return res;
res = pinRange->GetStartOffset(&startOffset);
if (NS_FAILED(res)) return res;
res = pinRange->GetEndParent(getter_AddRefs(endNode));
if (NS_FAILED(res)) return res;
res = pinRange->GetEndOffset(&endOffset);
if (NS_FAILED(res)) return res;
res = aSelection->Collapse(startNode,startOffset);
if (NS_FAILED(res)) return res;
res = aSelection->Extend(endNode,endOffset);
if (NS_FAILED(res)) return res;
}
return NS_OK;
}
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