зеркало из https://github.com/mozilla/pjs.git
500 строки
14 KiB
C++
500 строки
14 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 "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 "nsVoidArray.h"
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#include "nsIDOMText.h"
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#include "nsIXTFBindableElementWrapper.h"
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#include "nsIXFormsContextControl.h"
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#include "nsIModelElementPrivate.h"
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#include "nsIXFormsItemElement.h"
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#include "nsIXFormsControl.h"
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#include "nsIDocument.h"
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#include "nsXFormsModelElement.h"
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#include "nsIXFormsCopyElement.h"
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#include "nsIDOMEventTarget.h"
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#include "nsIXFormsDelegate.h"
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#include "nsIXFormsAccessors.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 nsXFormsBindableStub,
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public nsIXFormsSelectChild,
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public nsIXFormsItemElement
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{
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public:
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nsXFormsItemElement() : mElement(nsnull), mDoneAddingChildren(PR_FALSE),
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mIsCopyItem(PR_FALSE)
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{
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}
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_NSIXFORMSITEMELEMENT
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NS_IMETHOD OnCreated(nsIXTFBindableElementWrapper *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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void Refresh();
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// nsIXFormsSelectChild
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NS_DECL_NSIXFORMSSELECTCHILD
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private:
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nsIDOMElement* mElement;
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PRBool mDoneAddingChildren;
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// If true, indicates that this item contains a xf:copy element (via
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// xf:itemset) rather than a xf:value element
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PRBool mIsCopyItem;
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};
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NS_IMPL_ISUPPORTS_INHERITED2(nsXFormsItemElement,
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nsXFormsBindableStub,
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nsIXFormsSelectChild,
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nsIXFormsItemElement)
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NS_IMETHODIMP
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nsXFormsItemElement::OnCreated(nsIXTFBindableElementWrapper *aWrapper)
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{
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nsresult rv = nsXFormsBindableStub::OnCreated(aWrapper);
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NS_ENSURE_SUCCESS(rv, rv);
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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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nsIXTFElement::NOTIFY_DONE_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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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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}
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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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mDoneAddingChildren = PR_TRUE;
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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::SelectItemByValue(const nsAString &aValue, nsIDOMNode **aSelected)
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{
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NS_ENSURE_ARG_POINTER(aSelected);
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NS_ENSURE_STATE(mElement);
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*aSelected = nsnull;
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if (mIsCopyItem) {
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// copy items are selected by node, not by value
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return NS_OK;
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}
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nsAutoString value;
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nsresult rv = GetValue(value);
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if (NS_SUCCEEDED(rv) && aValue.Equals(value)) {
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NS_ADDREF(*aSelected = mElement);
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}
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return rv;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::SelectItemByNode(nsIDOMNode *aNode, nsIDOMNode **aSelected)
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{
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NS_ENSURE_ARG_POINTER(aSelected);
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NS_ENSURE_STATE(mElement);
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PRBool isCopyItem;
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*aSelected = nsnull;
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// If this item doesn't contain a copy element but instead has a value
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// element, then there is no sense testing further.
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GetIsCopyItem(&isCopyItem);
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if (!isCopyItem) {
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return NS_ERROR_FAILURE;
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}
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nsCOMPtr<nsIDOMNode> copyNode;
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GetCopyNode(getter_AddRefs(copyNode));
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NS_ENSURE_STATE(copyNode);
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PRUint16 nodeType;
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copyNode->GetNodeType(&nodeType);
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// copy elements are only allowed to bind to ELEMENT_NODEs per spec. But
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// test first before doing all of this work.
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if ((nodeType == nsIDOMNode::ELEMENT_NODE) &&
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(nsXFormsUtils::AreNodesEqual(copyNode, aNode))) {
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NS_ADDREF(*aSelected = mElement);
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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::GetValue(nsAString &aValue)
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{
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PRBool isCopyItem;
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GetIsCopyItem(&isCopyItem);
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if (isCopyItem) {
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// if this item was built by an itemset and the itemset's template used
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// a copy element, then there is no value element to be had. No sense
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// continuing.
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aValue.Truncate(0);
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return NS_ERROR_FAILURE;
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}
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nsCOMPtr<nsIDOMNode> firstChild, container;
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mElement->GetFirstChild(getter_AddRefs(firstChild));
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// If this element is generated inside an <itemset>,
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// there is a <contextcontainer> element between this element
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// and the actual childnodes.
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if (nsXFormsUtils::IsXFormsElement(firstChild,
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NS_LITERAL_STRING("contextcontainer"))) {
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container = firstChild;
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} else {
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container = mElement;
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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 = container->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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NS_IMETHODIMP
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nsXFormsItemElement::GetCopyNode(nsIDOMNode **aNode)
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{
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NS_ENSURE_ARG_POINTER(aNode);
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PRBool isCopyItem;
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GetIsCopyItem(&isCopyItem);
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if (!isCopyItem) {
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// If this item doesn't contain a copy element but instead has a value
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// element, then there is no sense continuing.
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*aNode = nsnull;
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return NS_ERROR_FAILURE;
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}
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// Since this item really contains a copy element, then firstChild MUST be
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// a contextcontainer since copy elements can only exist as a child of an
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// itemset.
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nsCOMPtr<nsIDOMNode> container;
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mElement->GetFirstChild(getter_AddRefs(container));
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// Find the copy element contained by this item and get the copyNode from it.
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nsCOMPtr<nsIDOMNodeList> children;
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nsresult rv = container->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<nsIXFormsCopyElement> copyElement = do_QueryInterface(child);
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if (copyElement) {
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return copyElement->GetCopyNode(aNode);
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}
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}
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// No copy element as a child. Set return node to null and set the copyitem
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// boolean to false so we don't go through this unnecessary pain again.
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aNode = nsnull;
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SetIsCopyItem(PR_FALSE);
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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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if (mDoneAddingChildren) {
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nsCOMPtr<nsIDOMNode> parent, current;
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current = mElement;
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do {
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current->GetParentNode(getter_AddRefs(parent));
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if (nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("select1")) ||
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nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("select"))) {
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nsCOMPtr<nsIXFormsControl> select(do_QueryInterface(parent));
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if (select) {
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select->Refresh();
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}
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return;
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}
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current = parent;
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} while(current);
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}
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}
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NS_IMETHODIMP
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nsXFormsItemElement::SetActive(PRBool aActive)
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{
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/// @see comment in nsIXFormsItemElement.idl
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NS_NAMED_LITERAL_STRING(active, "_moz_active");
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return aActive ?
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mElement->SetAttribute(active, NS_LITERAL_STRING("1")) :
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mElement->RemoveAttribute(active);
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}
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NS_IMETHODIMP
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nsXFormsItemElement::GetLabelText(nsAString& aValue)
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{
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NS_ENSURE_STATE(mElement);
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aValue.Truncate(0);
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nsCOMPtr<nsIDOMNode> firstChild, container;
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mElement->GetFirstChild(getter_AddRefs(firstChild));
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// If this element is generated inside an <itemset>,
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// there is a <contextcontainer> element between this element
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// and the actual childnodes.
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if (nsXFormsUtils::IsXFormsElement(firstChild,
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NS_LITERAL_STRING("contextcontainer"))) {
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container = firstChild;
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} else {
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container = mElement;
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}
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nsCOMPtr<nsIDOMNodeList> children;
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container->GetChildNodes(getter_AddRefs(children));
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NS_ENSURE_STATE(children);
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PRUint32 childCount;
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children->GetLength(&childCount);
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nsCOMPtr<nsIDOMDocument> doc;
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mElement->GetOwnerDocument(getter_AddRefs(doc));
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nsCOMPtr<nsIDOMNode> child;
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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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if (nsXFormsUtils::IsXFormsElement(child, NS_LITERAL_STRING("label"))) {
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nsCOMPtr<nsIXFormsDelegate> label(do_QueryInterface(child));
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NS_ENSURE_STATE(label);
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nsCOMPtr<nsIXFormsAccessors> accessors;
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label->GetXFormsAccessors(getter_AddRefs(accessors));
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NS_ENSURE_STATE(accessors);
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return accessors->GetValue(aValue);
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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::LabelRefreshed()
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{
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NS_ENSURE_STATE(mElement);
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nsCOMPtr<nsIDOMNode> parent, current;
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current = mElement;
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do {
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current->GetParentNode(getter_AddRefs(parent));
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if (nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("select1")) ||
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nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("select"))) {
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nsCOMPtr<nsIXFormsControl> select(do_QueryInterface(parent));
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if (select) {
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select->Refresh();
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}
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return NS_OK;
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}
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current = parent;
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} while(current);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::GetIsCopyItem(PRBool *aIsCopyItem)
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{
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NS_ENSURE_ARG(aIsCopyItem);
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*aIsCopyItem = mIsCopyItem;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsItemElement::SetIsCopyItem(PRBool aIsCopyItem)
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{
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mIsCopyItem = aIsCopyItem;
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return NS_OK;
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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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