334 lines
9.5 KiB
C++
334 lines
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*/
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.1 (the "License"); you may not use this file except in
|
|
* compliance with the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2001
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Heikki Toivonen <heikki@netscape.com> (original author)
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the NPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the NPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
/**
|
|
* Implementation for FIXptr, a W3C proposal.
|
|
*
|
|
* http://lists.w3.org/Archives/Public/www-xml-linking-comments/2001AprJun/att-0074/01-NOTE-FIXptr-20010425.htm
|
|
*
|
|
*/
|
|
#include "nsIDOMDocument.h"
|
|
#include "nsIContent.h"
|
|
#include "nsIDOMRange.h"
|
|
#include "nsISelection.h"
|
|
#include "nsIDOMNode.h"
|
|
#include "nsIDOMElement.h"
|
|
#include "nsIDOMNodeList.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsIServiceManager.h"
|
|
#include "nsFIXptr.h"
|
|
|
|
#include "nsContentCID.h"
|
|
static NS_DEFINE_IID(kRangeCID, NS_RANGE_CID);
|
|
|
|
// Get nth child element
|
|
static nsresult GetChild(nsIDOMNode *aParent, PRInt32 aChildNum, nsIDOMNode **aChild)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aParent);
|
|
NS_ENSURE_ARG_POINTER(aChild);
|
|
|
|
*aChild = nsnull;
|
|
nsCOMPtr<nsIDOMNodeList> list;
|
|
aParent->GetChildNodes(getter_AddRefs(list));
|
|
if (!list)
|
|
return NS_OK;
|
|
|
|
PRUint32 count;
|
|
list->GetLength(&count);
|
|
PRUint32 i;
|
|
PRInt32 curChildNum = 0;
|
|
for (i = 0; i < count; i++) {
|
|
nsCOMPtr<nsIDOMNode> node;
|
|
list->Item(i, getter_AddRefs(node));
|
|
if (!node)
|
|
break;
|
|
PRUint16 nodeType;
|
|
node->GetNodeType(&nodeType);
|
|
if (nodeType == nsIDOMNode::ELEMENT_NODE) {
|
|
curChildNum++;
|
|
}
|
|
if (curChildNum == aChildNum) {
|
|
*aChild = node;
|
|
NS_ADDREF(*aChild);
|
|
break;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// Get range for char index
|
|
static nsresult GetCharRange(nsIDOMNode *aParent, PRInt32 aCharNum, nsIDOMRange **aRange)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aParent);
|
|
NS_ENSURE_ARG_POINTER(aRange);
|
|
|
|
*aRange = nsnull;
|
|
nsCOMPtr<nsIDOMNodeList> list;
|
|
aParent->GetChildNodes(getter_AddRefs(list));
|
|
if (!list)
|
|
return NS_OK;
|
|
|
|
PRUint32 count;
|
|
list->GetLength(&count);
|
|
PRUint32 i;
|
|
PRInt32 maxCharNum = 0;
|
|
PRInt32 prevCharNum = 0;
|
|
for (i = 0; i < count; i++) {
|
|
nsCOMPtr<nsIDOMNode> node;
|
|
list->Item(i, getter_AddRefs(node));
|
|
if (!node)
|
|
break;
|
|
PRUint16 nodeType;
|
|
node->GetNodeType(&nodeType);
|
|
if (nodeType & (nsIDOMNode::TEXT_NODE | nsIDOMNode::CDATA_SECTION_NODE)) {
|
|
nsAutoString value;
|
|
node->GetNodeValue(value);
|
|
maxCharNum += value.Length();
|
|
}
|
|
if (maxCharNum >= aCharNum) {
|
|
nsCOMPtr<nsIDOMRange> range(do_CreateInstance(kRangeCID));
|
|
if (!range)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
range->SetStart(node, aCharNum - prevCharNum);
|
|
range->SetEnd(node, aCharNum - prevCharNum + 1);
|
|
*aRange = range.get();
|
|
NS_ADDREF(*aRange);
|
|
break;
|
|
}
|
|
prevCharNum = maxCharNum;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// Get node by tumbler
|
|
static nsresult GetTumblerNode(nsIDOMNode *aParent, const nsString &aTumbler, nsIDOMNode **aNode)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aParent);
|
|
NS_ENSURE_ARG_POINTER(aNode);
|
|
|
|
*aNode = nsnull;
|
|
nsAutoString tumbler(aTumbler);
|
|
if (tumbler[0] == '/')
|
|
tumbler.Cut(0, 1);
|
|
nsCOMPtr<nsIDOMNode> node(aParent);
|
|
while (!tumbler.IsEmpty() && node) {
|
|
PRInt32 sep = tumbler.FindChar('/');
|
|
if (sep > 0) {
|
|
nsAutoString num;
|
|
tumbler.Left(num, sep);
|
|
PRInt32 error;
|
|
PRInt32 n = num.ToInteger(&error);
|
|
if (n <= 0) {
|
|
node = nsnull;
|
|
break;
|
|
}
|
|
nsCOMPtr<nsIDOMNode> child;
|
|
GetChild(node, n, getter_AddRefs(child));
|
|
node = child;
|
|
} else {
|
|
// Last
|
|
PRInt32 error;
|
|
PRInt32 n = tumbler.ToInteger(&error);
|
|
if (n <= 0) {
|
|
node = nsnull;
|
|
break;
|
|
}
|
|
nsCOMPtr<nsIDOMNode> child;
|
|
GetChild(node, n, getter_AddRefs(child));
|
|
node = child;
|
|
break;
|
|
}
|
|
tumbler.Cut(0, sep + 1);
|
|
}
|
|
*aNode = node.get();
|
|
NS_IF_ADDREF(*aNode);
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsresult GetRange(
|
|
nsIDOMDocument *aDocument,
|
|
const nsAString& aExpression,
|
|
nsIDOMRange **aRange)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
nsCOMPtr<nsIDOMNode> node;
|
|
if (nsString::IsAlpha(aExpression.First())) {
|
|
// name
|
|
nsAutoString id;
|
|
const nsAutoString expression(aExpression);
|
|
PRInt32 sep = expression.FindCharInSet("/(");
|
|
if (sep > 0) {
|
|
expression.Left(id,sep);
|
|
nsCOMPtr<nsIDOMElement> element;
|
|
aDocument->GetElementById(id, getter_AddRefs(element));
|
|
node = do_QueryInterface(element);
|
|
if (node) {
|
|
if (expression[sep] == '/') {
|
|
// tumbler
|
|
nsAutoString tumbler;
|
|
expression.Mid(tumbler, sep, expression.Length());
|
|
sep = tumbler.FindChar('(');
|
|
if (sep > 0)
|
|
tumbler.Truncate(sep);
|
|
nsCOMPtr<nsIDOMNode> child;
|
|
GetTumblerNode(node, tumbler, getter_AddRefs(child));
|
|
node = child;
|
|
}
|
|
// char
|
|
sep = expression.FindChar('(');
|
|
if (sep > 0) {
|
|
nsAutoString charNum(aExpression);
|
|
if (charNum[charNum.Length() -1] == ')') {
|
|
charNum.Truncate(charNum.Length() - 1);
|
|
charNum.Cut(0, sep + 1);
|
|
PRInt32 error;
|
|
PRInt32 n = charNum.ToInteger(&error);
|
|
if (n < 1)
|
|
return NS_OK;
|
|
rv = GetCharRange(node, n - 1, aRange);
|
|
if (!*aRange) {
|
|
node = nsnull;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// just name
|
|
nsCOMPtr<nsIDOMElement> element;
|
|
aDocument->GetElementById(expression, getter_AddRefs(element));
|
|
node = do_QueryInterface(element);
|
|
}
|
|
} else if (aExpression.First() == '/') {
|
|
// Starts with tumbler
|
|
node = do_QueryInterface(aDocument);
|
|
nsCOMPtr<nsIDOMNode> child;
|
|
nsAutoString tumbler(aExpression);
|
|
PRInt32 sep = tumbler.FindChar('(');
|
|
if (sep > 0)
|
|
tumbler.Truncate(sep);
|
|
GetTumblerNode(node, tumbler, getter_AddRefs(child));
|
|
node = child;
|
|
// char
|
|
sep = aExpression.FindChar('(');
|
|
if (sep > 0) {
|
|
nsAutoString charNum(aExpression);
|
|
if (charNum[charNum.Length() -1] == ')') {
|
|
charNum.Truncate(charNum.Length() - 1);
|
|
charNum.Cut(0, sep + 1);
|
|
PRInt32 error;
|
|
PRInt32 n = charNum.ToInteger(&error);
|
|
if (n < 1)
|
|
return NS_OK;
|
|
rv = GetCharRange(node, n - 1, aRange);
|
|
if (!*aRange) {
|
|
node = nsnull;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// Not FIXptr
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv) && !*aRange && node) {
|
|
nsCOMPtr<nsIDOMRange> range(do_CreateInstance(kRangeCID));
|
|
if (!range)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
range->SelectNode(node);
|
|
*aRange = range.get();
|
|
NS_ADDREF(*aRange);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* Evaluate a FIXptr expression.
|
|
*
|
|
* @param aDocument The document in which to evaluate.
|
|
* @param aExpression The FIXptr expression string to evaluate.
|
|
* @param aRange The resulting range.
|
|
*/
|
|
nsresult
|
|
nsFIXptr::Evaluate(nsIDOMDocument *aDocument,
|
|
const nsAString& aExpression,
|
|
nsIDOMRange **aRange)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aDocument);
|
|
NS_ENSURE_ARG_POINTER(aRange);
|
|
*aRange = nsnull;
|
|
|
|
nsresult rv;
|
|
|
|
PRInt32 split = aExpression.FindChar(',');
|
|
if (split >= 0) {
|
|
nsAutoString expr1, expr2;
|
|
nsCOMPtr<nsIDOMRange> range1, range2;
|
|
|
|
aExpression.Left(expr1, split);
|
|
aExpression.Mid(expr2, split + 1, aExpression.Length());
|
|
|
|
rv = GetRange(aDocument, expr1, getter_AddRefs(range1));
|
|
if (!range1)
|
|
return rv;
|
|
rv = GetRange(aDocument, expr2, getter_AddRefs(range2));
|
|
if (!range2)
|
|
return rv;
|
|
|
|
nsCOMPtr<nsIDOMNode> begin, end;
|
|
PRInt32 beginOffset, endOffset;
|
|
range1->GetStartContainer(getter_AddRefs(begin));
|
|
range1->GetStartOffset(&beginOffset);
|
|
range2->GetEndContainer(getter_AddRefs(end));
|
|
range2->GetEndOffset(&endOffset);
|
|
|
|
nsCOMPtr<nsIDOMRange> range(do_CreateInstance(kRangeCID, &rv));
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
range->SetStart(begin, beginOffset);
|
|
range->SetEnd(end, endOffset);
|
|
*aRange = range.get();
|
|
NS_ADDREF(*aRange);
|
|
} else {
|
|
rv = GetRange(aDocument, aExpression, aRange);
|
|
}
|
|
|
|
return rv;
|
|
}
|