зеркало из https://github.com/mozilla/pjs.git
392 строки
11 KiB
C++
392 строки
11 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 "nsIXFormsSelectChild.h"
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#include "nsXFormsStubElement.h"
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#include "nsIDOMHTMLOptionElement.h"
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#include "nsXFormsAtoms.h"
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#include "nsIDOMNodeList.h"
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#include "nsIXTFGenericElementWrapper.h"
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#include "nsIDOMDocument.h"
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#include "nsString.h"
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#include "nsXFormsUtils.h"
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#include "nsIXFormsValueElement.h"
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#include "nsArray.h"
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#include "nsVoidArray.h"
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#include "nsIDOMText.h"
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#include "nsIXTFXMLVisualWrapper.h"
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#include "nsIXFormsContextControl.h"
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#include "nsIModelElementPrivate.h"
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/**
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* nsXFormsItemElement implements the XForms \<item\> element.
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* It creates an anonymous HTML option element with the appropriate label,
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* which is inserted into the anonymous content tree of the containing
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* select element.
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*/
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class nsXFormsItemElement : public nsXFormsStubElement,
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public nsIXFormsSelectChild
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{
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public:
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nsXFormsItemElement() : mElement(nsnull),
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mContextPosition(0),
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mContextSize(0)
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{
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}
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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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// nsIXTFElement overrides
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NS_IMETHOD ParentChanged(nsIDOMElement *aNewParent);
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NS_IMETHOD ChildInserted(nsIDOMNode *aChild, PRUint32 aIndex);
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NS_IMETHOD ChildAppended(nsIDOMNode *aChild);
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NS_IMETHOD WillRemoveChild(PRUint32 aIndex);
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NS_IMETHOD BeginAddingChildren();
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NS_IMETHOD DoneAddingChildren();
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// nsIXFormsSelectChild
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NS_DECL_NSIXFORMSSELECTCHILD
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private:
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NS_HIDDEN_(void) Refresh();
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NS_HIDDEN_(nsresult) GetValue(nsString &aValue);
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nsIDOMElement *mElement;
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nsCOMPtr<nsIDOMHTMLOptionElement> mOption;
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// context node (used by itemset)
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nsCOMPtr<nsIDOMElement> mContextNode;
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PRInt32 mContextPosition;
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PRInt32 mContextSize;
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};
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NS_IMPL_ISUPPORTS_INHERITED1(nsXFormsItemElement,
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nsXFormsStubElement,
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nsIXFormsSelectChild)
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NS_IMETHODIMP
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nsXFormsItemElement::OnCreated(nsIXTFGenericElementWrapper *aWrapper)
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{
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aWrapper->SetNotificationMask(nsIXTFElement::NOTIFY_PARENT_CHANGED |
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nsIXTFElement::NOTIFY_CHILD_INSERTED |
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nsIXTFElement::NOTIFY_CHILD_APPENDED |
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nsIXTFElement::NOTIFY_WILL_REMOVE_CHILD |
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nsIXTFElement::NOTIFY_BEGIN_ADDING_CHILDREN);
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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 a 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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// Our anonymous content structure will look like this:
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//
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// <option/> (mOption, also insertion point)
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//
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nsCOMPtr<nsIDOMDocument> domDoc;
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node->GetOwnerDocument(getter_AddRefs(domDoc));
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nsCOMPtr<nsIDOMElement> element;
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domDoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XHTML),
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NS_LITERAL_STRING("option"),
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getter_AddRefs(element));
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mOption = do_QueryInterface(element);
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NS_ENSURE_TRUE(mOption, NS_ERROR_FAILURE);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::ParentChanged(nsIDOMElement *aNewParent)
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{
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if (aNewParent)
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Refresh();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::ChildInserted(nsIDOMNode *aChild, PRUint32 aIndex)
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{
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// If a label child was inserted, we need to clone it into our
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// anonymous content.
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if (nsXFormsUtils::IsLabelElement(aChild))
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Refresh();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::ChildAppended(nsIDOMNode *aChild)
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{
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// If a label child was inserted, we need to clone it into our
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// anonymous content.
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if (nsXFormsUtils::IsLabelElement(aChild))
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Refresh();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::WillRemoveChild(PRUint32 aIndex)
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{
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nsCOMPtr<nsIDOMNodeList> children;
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nsresult rv = mElement->GetChildNodes(getter_AddRefs(children));
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIDOMNode> child;
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children->Item(aIndex, getter_AddRefs(child));
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if (child && nsXFormsUtils::IsLabelElement(child)) {
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// If a label child was removed, we need to remove the label from our
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// anonymous content.
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Refresh();
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::BeginAddingChildren()
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{
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// Suppress child notifications until we're done getting children.
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nsCOMPtr<nsIXTFElementWrapper> wrapper = do_QueryInterface(mElement);
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NS_ASSERTION(wrapper, "huh? our element must be an xtf wrapper");
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wrapper->SetNotificationMask(nsIXTFElement::NOTIFY_PARENT_CHANGED |
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nsIXTFElement::NOTIFY_DONE_ADDING_CHILDREN);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::DoneAddingChildren()
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{
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// Unsuppress notifications
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nsCOMPtr<nsIXTFElementWrapper> wrapper = do_QueryInterface(mElement);
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NS_ASSERTION(wrapper, "huh? our element must be an xtf wrapper");
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wrapper->SetNotificationMask(nsIXTFElement::NOTIFY_PARENT_CHANGED |
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nsIXTFElement::NOTIFY_CHILD_INSERTED |
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nsIXTFElement::NOTIFY_CHILD_APPENDED |
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nsIXTFElement::NOTIFY_WILL_REMOVE_CHILD);
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// Assume that we've got something worth refreshing now.
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Refresh();
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return NS_OK;
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}
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// nsIXFormsSelectChild
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NS_IMETHODIMP
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nsXFormsItemElement::GetAnonymousNodes(nsIArray **aNodes)
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{
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nsCOMPtr<nsIMutableArray> array;
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nsresult rv = NS_NewArray(getter_AddRefs(array));
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NS_ENSURE_SUCCESS(rv, rv);
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array->AppendElement(mOption, PR_FALSE);
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NS_ADDREF(*aNodes = array);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::SelectItemsByValue(const nsStringArray &aValueList)
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{
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nsAutoString value;
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nsresult rv = GetValue(value);
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NS_ENSURE_SUCCESS(rv, rv);
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PRInt32 count = aValueList.Count();
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for (PRInt32 i = 0; i < count; ++i) {
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if (aValueList[i]->Equals(value)) {
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mOption->SetSelected(PR_TRUE);
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break;
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::SelectItemsByContent(nsIDOMNode *aNode)
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{
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// TODO: implement support for \<copy\> element.
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::WriteSelectedItems(nsIDOMNode *aContainer,
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nsAString &aStringBuffer)
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{
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PRBool selected;
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mOption->GetSelected(&selected);
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if (!selected)
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return NS_OK;
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nsAutoString value;
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nsresult rv = GetValue(value);
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NS_ENSURE_SUCCESS(rv, rv);
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if(aStringBuffer.IsEmpty()){
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aStringBuffer.Append(value);
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}
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else{
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aStringBuffer.Append(NS_LITERAL_STRING(" ") + value);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::SetContext(nsIDOMElement *aContextNode,
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PRInt32 aContextPosition, PRInt32 aContextSize)
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{
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mContextNode = aContextNode;
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mContextPosition = aContextPosition;
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mContextSize = aContextSize;
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return NS_OK;
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}
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// internal methods
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nsresult
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nsXFormsItemElement::GetValue(nsString &aValue)
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{
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// Find our value child and get its text content.
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nsCOMPtr<nsIDOMNodeList> children;
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nsresult rv = mElement->GetChildNodes(getter_AddRefs(children));
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NS_ENSURE_SUCCESS(rv, rv);
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PRUint32 childCount;
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children->GetLength(&childCount);
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nsCOMPtr<nsIDOMNode> child;
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nsAutoString value;
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for (PRUint32 i = 0; i < childCount; ++i) {
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children->Item(i, getter_AddRefs(child));
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nsCOMPtr<nsIXFormsValueElement> valueElement = do_QueryInterface(child);
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if (valueElement) {
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return valueElement->GetValue(aValue);
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}
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}
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// No value children, so our value is empty
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aValue.Truncate(0);
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return NS_OK;
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}
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void
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nsXFormsItemElement::Refresh()
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{
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// Clear out all of the existing option text
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nsCOMPtr<nsIDOMNode> child, child2;
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while (NS_SUCCEEDED(mOption->GetFirstChild(getter_AddRefs(child))) && child)
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mOption->RemoveChild(child, getter_AddRefs(child2));
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// We need to find our label child, serialize its contents
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// (which can be xtf-generated), and set that as our label attribute.
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nsCOMPtr<nsIDOMNodeList> children;
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nsresult rv = mElement->GetChildNodes(getter_AddRefs(children));
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if (NS_FAILED(rv))
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return;
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PRUint32 childCount;
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children->GetLength(&childCount);
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nsAutoString value;
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nsCOMPtr<nsIDOMDocument> doc;
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mElement->GetOwnerDocument(getter_AddRefs(doc));
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nsCOMPtr<nsIDOMElement> container;
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doc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XFORMS),
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NS_LITERAL_STRING("contextcontainer-inline"),
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getter_AddRefs(container));
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NS_NAMED_LITERAL_STRING(modelStr, "model");
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nsAutoString modelID;
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mElement->GetAttribute(modelStr, modelID);
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container->SetAttribute(modelStr, modelID);
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nsCOMPtr<nsIXFormsContextControl> context = do_QueryInterface(container);
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context->SetContextNode(mContextNode);
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for (PRUint32 i = 0; i < childCount; ++i) {
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children->Item(i, getter_AddRefs(child));
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child->GetLocalName(value);
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if (value.EqualsLiteral("label")) {
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child->GetNamespaceURI(value);
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if (value.EqualsLiteral(NS_NAMESPACE_XFORMS)) {
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child->CloneNode(PR_TRUE, getter_AddRefs(child2));
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container->AppendChild(child2, getter_AddRefs(child));
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}
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}
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}
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nsCOMPtr<nsIDOMNode> childReturn;
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mOption->AppendChild(container, getter_AddRefs(childReturn));
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}
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NS_HIDDEN_(nsresult)
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NS_NewXFormsItemElement(nsIXTFElement **aResult)
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{
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*aResult = new nsXFormsItemElement();
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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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