mirror of
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135 lines
4.4 KiB
C++
135 lines
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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* Brian Ryner <bryner@brianryner.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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#include "nsIXFormsValueElement.h"
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#include "nsXFormsStubElement.h"
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#include "nsIXTFGenericElementWrapper.h"
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#include "nsIDOM3Node.h"
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#include "nsXFormsUtils.h"
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#include "nsIDOMElement.h"
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#include "nsString.h"
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/**
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* Implementation of the XForms \<value\> element.
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*
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* @note The value element does not display any content, it simply provides
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* a value from inline text or instance data.
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*/
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class nsXFormsValueElement : public nsXFormsStubElement,
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public nsIXFormsValueElement
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{
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public:
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nsXFormsValueElement() : mElement(nsnull) {}
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NS_DECL_ISUPPORTS_INHERITED
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// nsIXTFGenericElement overrides
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NS_IMETHOD OnCreated(nsIXTFGenericElementWrapper *aWrapper);
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// nsIXFormsValueElement
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NS_DECL_NSIXFORMSVALUEELEMENT
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private:
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nsIDOMElement *mElement;
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};
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NS_IMPL_ISUPPORTS_INHERITED1(nsXFormsValueElement,
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nsXFormsStubElement,
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nsIXFormsValueElement)
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NS_IMETHODIMP
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nsXFormsValueElement::OnCreated(nsIXTFGenericElementWrapper *aWrapper)
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{
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nsCOMPtr<nsIDOMElement> node;
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aWrapper->GetElementNode(getter_AddRefs(node));
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// It's ok to keep pointer to mElement. mElement will have an
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// owning reference to this object, so as long as we null out mElement in
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// OnDestroyed, it will always be valid.
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mElement = node;
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NS_ASSERTION(mElement, "Wrapper is not an nsIDOMElement, we'll crash soon");
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return NS_OK;
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}
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// nsIXFormsValueElement
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NS_IMETHODIMP
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nsXFormsValueElement::GetValue(nsAString &aValue)
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{
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nsCOMPtr<nsIModelElementPrivate> model;
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nsCOMPtr<nsIDOMXPathResult> result;
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nsXFormsUtils::EvaluateNodeBinding(mElement,
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nsXFormsUtils::ELEMENT_WITH_MODEL_ATTR,
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NS_LITERAL_STRING("ref"),
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EmptyString(),
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nsIDOMXPathResult::FIRST_ORDERED_NODE_TYPE,
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getter_AddRefs(model),
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getter_AddRefs(result));
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if (result) {
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nsCOMPtr<nsIDOMNode> singleNode;
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result->GetSingleNodeValue(getter_AddRefs(singleNode));
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if (singleNode) {
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nsString value;
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nsXFormsUtils::GetNodeValue(singleNode, value);
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aValue.Assign(value);
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return NS_OK;
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}
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}
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nsCOMPtr<nsIDOM3Node> node3 = do_QueryInterface(mElement);
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NS_ASSERTION(node3, "dom elements must support dom3");
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return node3->GetTextContent(aValue);
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}
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NS_HIDDEN_(nsresult)
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NS_NewXFormsValueElement(nsIXTFElement **aResult)
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{
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*aResult = new nsXFormsValueElement();
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if (!*aResult)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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