xforms bug 258472 - Add the XPath functions needed for XForms, r=sicking,sr=peterv
git-svn-id: svn://10.0.0.236/trunk@168425 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
doronr%us.ibm.com
@@ -0,0 +1,506 @@
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla XForms support.
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*
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* The Initial Developer of the Original Code is
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* IBM Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2004
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Aaron Reed <aaronr@us.ibm.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* XFormsFunctionCall
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* A representation of the XPath NodeSet funtions
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*/
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#include "FunctionLib.h"
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#include "nsAutoPtr.h"
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#include "txNodeSet.h"
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#include "txAtoms.h"
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#include "txIXPathContext.h"
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#include "txTokenizer.h"
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#include "XFormsFunctions.h"
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#include <math.h>
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#include "nsIDOMDocument.h"
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#include "nsIDOMDocumentEvent.h"
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#include "nsIDOMEvent.h"
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#include "nsIDOMEventTarget.h"
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#include "nsIDOMElement.h"
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#include "nsIXFormsUtilityService.h"
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#include "nsServiceManagerUtils.h" // needed for do_GetService?
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#include "prprf.h"
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/*
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* Creates a XFormsFunctionCall of the given type
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*/
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XFormsFunctionCall::XFormsFunctionCall(XFormsFunctions aType, nsIDOMNode *aResolverNode)
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: mType(aType)
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, mResolverNode(aResolverNode)
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{
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}
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/*
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* Evaluates this Expr based on the given context node and processor state
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* @param context the context node for evaluation of this Expr
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* @param ps the ContextState containing the stack information needed
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* for evaluation
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* @return the result of the evaluation
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*/
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nsresult
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XFormsFunctionCall::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
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{
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*aResult = nsnull;
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nsresult rv = NS_OK;
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txListIterator iter(¶ms);
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switch (mType) {
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case AVG:
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{
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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nsRefPtr<txNodeSet> nodes;
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nsresult rv = evaluateToNodeSet((Expr*)iter.next(), aContext,
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getter_AddRefs(nodes));
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NS_ENSURE_SUCCESS(rv, rv);
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double res = 0;
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PRInt32 i;
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for (i = 0; i < nodes->size(); ++i) {
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nsAutoString resultStr;
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txXPathNodeUtils::appendNodeValue(nodes->get(i), resultStr);
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res += Double::toDouble(resultStr);
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}
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if (i > 0) {
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res = (res/i);
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}
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else {
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res = Double::NaN;
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}
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return aContext->recycler()->getNumberResult(res, aResult);
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}
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case BOOLEANFROMSTRING:
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{
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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PRInt32 retvalue = -1;
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nsAutoString booleanValue;
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evaluateToString((Expr*)iter.next(), aContext, booleanValue);
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aContext->recycler()->getBoolResult(
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booleanValue.EqualsLiteral("1") ||
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booleanValue.LowerCaseEqualsLiteral("true"),
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aResult);
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return NS_OK;
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}
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case COUNTNONEMPTY:
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{
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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nsRefPtr<txNodeSet> nodes;
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nsresult rv = evaluateToNodeSet((Expr*)iter.next(), aContext,
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getter_AddRefs(nodes));
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NS_ENSURE_SUCCESS(rv, rv);
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double res = 0, test = 0;
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PRInt32 i, count=0;
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for (i = 0; i < nodes->size(); ++i) {
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nsAutoString resultStr;
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txXPathNodeUtils::appendNodeValue(nodes->get(i), resultStr);
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if (!resultStr.IsEmpty()) {
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count++;
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}
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}
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return aContext->recycler()->getNumberResult(count, aResult);
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}
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case DAYSFROMDATE:
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{
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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case IF:
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{
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if (!requireParams(3, 3, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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PRBool test;
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nsAutoString valueToReturn;
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test = evaluateToBoolean((Expr*)iter.next(), aContext);
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// grab 'true' value to return
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Expr *getvalue = (Expr*)iter.next();
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if (!test) {
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// grab 'false' value to return
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getvalue = (Expr*)iter.next();
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}
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evaluateToString(getvalue, aContext, valueToReturn);
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return aContext->recycler()->getStringResult(valueToReturn, aResult);
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}
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case INDEX:
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{
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// Given an element's id as the parameter, need to query the element and
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// make sure that it is a xforms:repeat node. Given that, must query
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// its index.
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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case INSTANCE:
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{
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nsresult rv;
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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nsRefPtr<txNodeSet> resultSet;
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rv = aContext->recycler()->getNodeSet(getter_AddRefs(resultSet));
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NS_ENSURE_SUCCESS(rv, rv);
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nsAutoString instanceId;
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evaluateToString((Expr*)iter.next(), aContext, instanceId);
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// here document is the XForms document
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nsCOMPtr<nsIDOMDocument> document;
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rv = mResolverNode->GetOwnerDocument(getter_AddRefs(document));
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(document, NS_ERROR_NULL_POINTER);
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nsCOMPtr<nsIDOMElement> instEle;
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rv = document->GetElementById(instanceId, getter_AddRefs(instEle));
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PRBool foundInstance = PR_FALSE;
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nsAutoString localname, namespaceURI;
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if (instEle) {
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instEle->GetLocalName(localname);
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instEle->GetNamespaceURI(namespaceURI);
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if (localname.EqualsLiteral("instance") &&
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namespaceURI.EqualsLiteral(NS_NAMESPACE_XFORMS)) {
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foundInstance = PR_TRUE;
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}
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}
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if (!foundInstance) {
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// We didn't find an instance element with the given id. Return the
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// empty result set.
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*aResult = resultSet;
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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// Make sure that this element is contained in the same
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// model as the context node of the expression as per
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// the XForms 1.0 spec.
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// first step is to get the contextNode passed in to
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// the evaluation
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nsCOMPtr<nsIDOMNode> xfContextNode;
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rv = txXPathNativeNode::getNode(aContext->getContextNode(),
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getter_AddRefs(xfContextNode));
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NS_ENSURE_SUCCESS(rv, rv);
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// now see if the node we found (instEle) and the
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// context node for the evaluation (xfContextNode) link
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// back to the same model.
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nsCOMPtr<nsIXFormsUtilityService>xformsService =
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do_GetService("@mozilla.org/xforms-utility-service;1", &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIDOMNode> instNode, modelInstance;
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instNode = do_QueryInterface(instEle);
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rv = xformsService->GetModelFromNode(instNode,
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getter_AddRefs(modelInstance));
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NS_ENSURE_SUCCESS(rv, rv);
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PRBool modelContainsNode = PR_FALSE;
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rv = xformsService->IsNodeAssocWithModel(xfContextNode,
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modelInstance,
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&modelContainsNode);
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NS_ENSURE_SUCCESS(rv, rv);
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if (modelContainsNode) {
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// ok, we've found an instance node with the proper id
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// that fulfills the requirement of being from the
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// same model as the context node. Now we need to
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// return a 'node-set containing just the root
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// element node of the referenced instance data'.
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// Wonderful.
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nsCOMPtr<nsIDOMNode> instanceRoot;
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rv = xformsService->GetInstanceDocumentRoot(
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instanceId,
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modelInstance,
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getter_AddRefs(instanceRoot));
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(instanceRoot, NS_ERROR_NULL_POINTER);
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nsAutoPtr<txXPathNode> txNode(txXPathNativeNode::createXPathNode(instanceRoot));
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if (txNode) {
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resultSet->add(*txNode);
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}
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}
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// XXX where we need to do the work
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// if (walker.moveToElementById(instanceId)) {
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// resultSet->add(walker.getCurrentPosition());
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// }
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*aResult = resultSet;
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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case MAX:
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{
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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nsRefPtr<txNodeSet> nodes;
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nsresult rv = evaluateToNodeSet((Expr*)iter.next(), aContext,
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getter_AddRefs(nodes));
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NS_ENSURE_SUCCESS(rv, rv);
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double res = Double::NaN;
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PRInt32 i;
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for (i = 0; i < nodes->size(); ++i) {
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double test;
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nsAutoString resultStr;
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txXPathNodeUtils::appendNodeValue(nodes->get(i), resultStr);
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test = Double::toDouble(resultStr);
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if (Double::isNaN(test)) {
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res = Double::NaN;
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break;
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}
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if (test > res || i == 0) {
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res = test;
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}
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}
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return aContext->recycler()->getNumberResult(res, aResult);
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}
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case MIN:
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{
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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nsRefPtr<txNodeSet> nodes;
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nsresult rv = evaluateToNodeSet((Expr*)iter.next(), aContext,
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getter_AddRefs(nodes));
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NS_ENSURE_SUCCESS(rv, rv);
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double res = Double::NaN;
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PRInt32 i;
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for (i = 0; i < nodes->size(); ++i) {
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double test;
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nsAutoString resultStr;
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txXPathNodeUtils::appendNodeValue(nodes->get(i), resultStr);
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test = Double::toDouble(resultStr);
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if (Double::isNaN(test)) {
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res = Double::NaN;
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break;
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}
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if ((test < res) || (i==0)) {
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res = test;
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}
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}
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return aContext->recycler()->getNumberResult(res, aResult);
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}
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case MONTHS:
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{
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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case NOW:
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{
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if (!requireParams(0, 0, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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PRExplodedTime time;
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char ctime[60];
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PR_ExplodeTime(PR_Now(), PR_LocalTimeParameters, &time);
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int gmtoffsethour = time.tm_params.tp_gmt_offset < 0 ?
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-1*time.tm_params.tp_gmt_offset / 3600 :
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time.tm_params.tp_gmt_offset / 3600;
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int remainder = time.tm_params.tp_gmt_offset%3600;
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int gmtoffsetminute = remainder ? remainder/60 : 00;
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char zone_location[40];
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const int zoneBufSize = sizeof(zone_location);
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PR_snprintf(zone_location, zoneBufSize, "%c%02d:%02d\0",
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time.tm_params.tp_gmt_offset < 0 ? '-' : '+',
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gmtoffsethour, gmtoffsetminute);
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PR_FormatTime(ctime, sizeof(ctime), "%Y-%m-%dT%H:%M:%S\0", &time);
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nsString sTime = NS_ConvertASCIItoUTF16(ctime) + NS_ConvertASCIItoUTF16(zone_location);
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return aContext->recycler()->getStringResult(sTime, aResult);
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}
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case PROPERTY:
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{
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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nsAutoString property;
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evaluateToString((Expr*)iter.next(), aContext, property);
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// This function can handle "version" and "conformance-level"
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// which is all that the XForms 1.0 spec is worried about
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if (property.Equals(NS_LITERAL_STRING("version")))
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property.Assign(NS_LITERAL_STRING("1.0"));
|
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else if (property.Equals(NS_LITERAL_STRING("conformance-level")))
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property.Assign(NS_LITERAL_STRING("basic"));
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return aContext->recycler()->getStringResult(property, aResult);
|
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}
|
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case SECONDS:
|
||||
{
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double dbl=0;
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if (!requireParams(1, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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return NS_ERROR_NOT_IMPLEMENTED;
|
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}
|
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case SECONDSFROMDATETIME:
|
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{
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if (!requireParams(1, 1, aContext))
|
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
|
||||
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||||
return NS_ERROR_NOT_IMPLEMENTED;
|
||||
}
|
||||
} /* switch() */
|
||||
|
||||
aContext->receiveError(NS_LITERAL_STRING("Internal error"),
|
||||
NS_ERROR_UNEXPECTED);
|
||||
return NS_ERROR_UNEXPECTED;
|
||||
}
|
||||
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||||
#ifdef TX_TO_STRING
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nsresult
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XFormsFunctionCall::getNameAtom(nsIAtom** aAtom)
|
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{
|
||||
switch (mType) {
|
||||
case AVG:
|
||||
{
|
||||
*aAtom = txXPathAtoms::avg;
|
||||
break;
|
||||
}
|
||||
case BOOLEANFROMSTRING:
|
||||
{
|
||||
*aAtom = txXPathAtoms::booleanFromString;
|
||||
break;
|
||||
}
|
||||
case COUNTNONEMPTY:
|
||||
{
|
||||
*aAtom = txXPathAtoms::countNonEmpty;
|
||||
break;
|
||||
}
|
||||
case DAYSFROMDATE:
|
||||
{
|
||||
*aAtom = txXPathAtoms::daysFromDate;
|
||||
break;
|
||||
}
|
||||
case IF:
|
||||
{
|
||||
*aAtom = txXPathAtoms::ifFunc;
|
||||
break;
|
||||
}
|
||||
case INDEX:
|
||||
{
|
||||
*aAtom = txXPathAtoms::index;
|
||||
break;
|
||||
}
|
||||
case INSTANCE:
|
||||
{
|
||||
*aAtom = txXPathAtoms::instance;
|
||||
break;
|
||||
}
|
||||
case MAX:
|
||||
{
|
||||
*aAtom = txXPathAtoms::max;
|
||||
break;
|
||||
}
|
||||
case MIN:
|
||||
{
|
||||
*aAtom = txXPathAtoms::min;
|
||||
break;
|
||||
}
|
||||
case MONTHS:
|
||||
{
|
||||
*aAtom = txXPathAtoms::months;
|
||||
break;
|
||||
}
|
||||
case NOW:
|
||||
{
|
||||
*aAtom = txXPathAtoms::now;
|
||||
break;
|
||||
}
|
||||
case PROPERTY:
|
||||
{
|
||||
*aAtom = txXPathAtoms::property;
|
||||
break;
|
||||
}
|
||||
case SECONDS:
|
||||
{
|
||||
*aAtom = txXPathAtoms::seconds;
|
||||
break;
|
||||
}
|
||||
case SECONDSFROMDATETIME:
|
||||
{
|
||||
*aAtom = txXPathAtoms::secondsFromDateTime;
|
||||
break;
|
||||
}
|
||||
default:
|
||||
{
|
||||
*aAtom = 0;
|
||||
return NS_ERROR_FAILURE;
|
||||
}
|
||||
}
|
||||
NS_ADDREF(*aAtom);
|
||||
return NS_OK;
|
||||
}
|
||||
#endif
|
||||
Reference in New Issue
Block a user