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gecko-dev/extensions/xforms/nsXFormsRepeatElement.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla XForms support.
*
* The Initial Developer of the Original Code is
* Novell, Inc.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Allan Beaufour <abeaufour@novell.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsIXTFXMLVisualWrapper.h"
#include "nsAutoPtr.h"
#include "nsCOMPtr.h"
#include "nsINameSpaceManager.h"
#include "nsISchema.h"
#include "nsIServiceManager.h"
#include "nsMemory.h"
#include "nsString.h"
#include "nsSubstring.h"
#include "nsIDOM3EventTarget.h"
#include "nsIDOM3Node.h"
#include "nsIDOMDOMImplementation.h"
#include "nsIDOMDocument.h"
#include "nsIDOMElement.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOMHTMLDivElement.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMXPathResult.h"
#include "nsXFormsControlStub.h"
#include "nsIXFormsContextControl.h"
#include "nsIXFormsRepeatElement.h"
#include "nsIXFormsRepeatItemElement.h"
#include "nsXFormsAtoms.h"
#include "nsXFormsModelElement.h"
#include "nsXFormsUtils.h"
#ifdef DEBUG
//#define DEBUG_XF_REPEAT
#endif
/**
* Implementation of the XForms \<repeat\> control.
* @see http://www.w3.org/TR/xforms/slice9.html#id2632123
*
* There are two main functions of repeat: 1) "Expanding its children" and 2)
* Maintaining the repeat-index. These are described here:
*
* <h2>Expanding its children</h2>
*
* On Refresh(), nsXFormsRepeatElement, does the following for each node in
* the nodeset the \<repeat\> tag is bound to:
*
* 1) Creates a new \<contextcontainer\> (nsXFormsContextContainer)
*
* 2) Clones all its children (that is children of its nsIXTFXMLVisualWrapper)
* and appends them as children to the nsXFormsContextContainer
*
* 3) Sets the context node and size for the nsXFormsContextContainer, so
* that children can retrieve this through nsIXFormsContextControl.
*
* 4) Inserts the nsXFormsContextContainer into its visual content node
* (mHTMLElement).
*
* For example, this instance data:
* <pre>
* <instance>
* <data>
* <n>val1</n>
* <n>val2</n>
* </data>
* </instance>
* </pre>
*
* and this repeat:
* <pre>
* <repeat nodeset="n">
* Val: <output ref="."/>
* </repeat>
* </pre>
*
* will be expanded to:
* <pre>
* <repeat nodeset="n">
* (anonymous content)
* <contextcontainer> (contextNode == "n[0]" and contextPosition == 1)
* Val: <output ref="."/> (that is: 'val1')
* </contextcontainer>
* <contextcontainer> (contextNode == "n[1]" and contextPosition == 2)
* Val: <output ref="."/> (that is: 'val2')
* </contextcontainer>
* (/anonymous content)
* </repeat>
* </pre>
*
* Besides being a practical way to implement \<repeat\>, it also means that it
* is possible to CSS-style the individual "rows" in a \<repeat\>.
*
* <h2>Maintaining the repeat-index</h2>
*
* The repeat-index points to the current child contextcontainer selected,
* which should be fairly easy, was it not for "nested repeats".
*
* If the DOM document has the following:
* <pre>
* <repeat id="r_outer">
* <repeat id="r_inner"/>
* </repeat>
* </pre>
* r_inner is cloned like all other elements:
* <pre>
* <repeat id="r_outer">
* (anonymous content)
* <contextcontainer>
* <repeat id="r_inner"/>
* </contextcontainer>
* <contextcontainer>
* <repeat id="r_inner"/>
* </contextcontainer>
* (/anonymous content)
* (DOM content -- not shown)
* <repeat id="r_inner"/>
* (/DOM content)
* </repeat>
* </pre>
*
* So r_inner in fact exists three places; once in the DOM and twice in the
* anonymous content of r_outer. The problem is that repeat-index can only be
* set for one row for each repeat. The approach we use here is to check
* whether we clone any \<repeat\> elements in Refresh() using our own
* CloneNode() function. If a \<repeat\> is found, we mark the original (DOM)
* \<repeat\> inactive with regards to content (mIsParent), and basically just
* use it to store a pointer to the current cloned \<repeat\>
* (mCurrentRepeat). We also store a pointer to the (DOM) parent in the cloned
* repeat (mParent).
*
* There are two ways the repeat-index can be changed, 1) by \<setindex\>
* (nsXFormsSetIndexElement) and 2) by a \<contextcontainer\> getting
* focus. We thus listen for focus-events in
* nsXFormsContextContainer::HandleDefault().
*
* If a \<repeat\> changes the repeat-index, any nested repeats have their
* repeat-index reset to their starting index (ResetInnerRepeats()).
*
* <h2>Notes / todo</h2>
*
* @todo Support attribute based repeats, as in: (XXX)
* \<html:table xforms:repeat-nodeset="..."\>
* @see http://www.w3.org/TR/xforms/index-all.html#ui.repeat.via.attrs
* @see http://bugzilla.mozilla.org/show_bug.cgi?id=280368
*
* @todo What happens if you set attributes on the parent repeat?
* Should they propagate to the cloned repeats? (XXX)
*
* @note Should we handle @number? The spec. says that it's a "Optional hint
* to the XForms Processor as to how many elements from the collection to
* display."
* @see https://bugzilla.mozilla.org/show_bug.cgi?id=302026
*/
class nsXFormsRepeatElement : public nsXFormsControlStub,
public nsIXFormsRepeatElement
{
protected:
/** The HTML representation for the node */
nsCOMPtr<nsIDOMHTMLDivElement> mHTMLElement;
/** True while children are being added */
PRBool mAddingChildren;
/**
* The current repeat-index, 0 if no row is selected (can happen for nested
* repeats) or there are no rows at all.
*
* @note That is the child \<contextcontainer\> at position mCurrentIndex -
* 1 (indexes go from 1, DOM from 0).
*/
PRUint32 mCurrentIndex;
/**
* The maximum index value
*/
PRUint32 mMaxIndex;
/** The parent repeat (nested repeats) */
nsCOMPtr<nsIXFormsRepeatElement> mParent;
/**
* The nested level of the repeat. That is, the number of \<repeat\>
* elements above us in the anonymous content tree. Used by
* ResetInnerRepeats().
*/
PRUint32 mLevel;
/**
* Are we a parent for nested repeats
*/
PRBool mIsParent;
/**
* The currently selected repeat (nested repeats)
*/
nsCOMPtr<nsIXFormsRepeatElement> mCurrentRepeat;
/**
* Array of controls using the repeat-index
*/
nsCOMArray<nsIXFormsControl> mIndexUsers;
/**
* Retrieves an integer attribute and checks its type.
*
* @param aName The attribute to retrieve
* @param aVal The value
* @param aType The attribute (Schema) type
* @return Normal error codes, and NS_ERROR_NOT_AVAILABLE if
* the attribute was empty/nonexistant
*/
nsresult GetIntAttr(const nsAString &aName,
PRInt32 *aVal,
const PRUint16 aType);
/**
* Set the repeat-index state for a given (nsIXFormsRepeatItemElement)
* child.
*
* @param aPosition The position of the child (1-based)
* @param aState The index state
* @param aIsRefresh Is this part of a refresh event
*/
nsresult SetChildIndex(PRUint32 aPosition,
PRBool aState,
PRBool aIsRefresh = PR_FALSE);
/**
* Resets inner repeat indexes to 1 for first level of nested repeats of
* |aNode|.
*
* @param aNode The node to search for repeats
* @param aIsRefresh Is this part of a refresh event
*/
nsresult ResetInnerRepeats(nsIDOMNode *aNode,
PRBool aIsRefresh);
/**
* Deep clones aSrc to aTarget, with special handling of \<repeat\> elements
* to take care of nested repeats.
*
* @param aSrc The source node
* @param aTarget The target node
*/
nsresult CloneNode(nsIDOMNode *aSrc, nsIDOMNode **aTarget);
/**
* If this attribute name is bind, model or nodeset, then remove the repeat
* control from the list of controls that the model keeps.
*/
void MaybeRemoveFromModel(nsIAtom *aName);
/**
* If this attribute name is bind, model or nodeset, then try to Bind and
* Refresh to keep the repeat element current
*/
void MaybeBindAndRefresh(nsIAtom *aName);
public:
NS_DECL_ISUPPORTS_INHERITED
// nsIXTFXMLVisual overrides
NS_IMETHOD OnCreated(nsIXTFXMLVisualWrapper *aWrapper);
// nsIXTFVisual overrides
NS_IMETHOD GetVisualContent(nsIDOMElement **aElement);
// nsIXTFElement overrides
NS_IMETHOD OnDestroyed();
NS_IMETHOD WillSetAttribute(nsIAtom *aName, const nsAString &aValue);
NS_IMETHOD AttributeSet(nsIAtom *aName, const nsAString &aValue);
NS_IMETHOD WillRemoveAttribute(nsIAtom *aName);
NS_IMETHOD AttributeRemoved(nsIAtom *aName);
NS_IMETHOD BeginAddingChildren();
NS_IMETHOD DoneAddingChildren();
// nsIXFormsControl
NS_IMETHOD Bind();
NS_IMETHOD Refresh();
NS_IMETHOD TryFocus(PRBool* aOK);
NS_IMETHOD IsEventTarget(PRBool *aOK);
// nsIXFormsRepeatElement
NS_DECL_NSIXFORMSREPEATELEMENT
// nsXFormsRepeatElement
nsXFormsRepeatElement() :
mAddingChildren(PR_FALSE),
mCurrentIndex(0),
mMaxIndex(0),
mLevel(1),
mIsParent(PR_FALSE)
{}
#ifdef DEBUG_smaug
virtual const char* Name() { return "repeat"; }
#endif
};
NS_IMPL_ISUPPORTS_INHERITED1(nsXFormsRepeatElement,
nsXFormsControlStub,
nsIXFormsRepeatElement)
// nsIXTFXMLVisual
NS_IMETHODIMP
nsXFormsRepeatElement::OnCreated(nsIXTFXMLVisualWrapper *aWrapper)
{
nsresult rv = nsXFormsControlStub::OnCreated(aWrapper);
NS_ENSURE_SUCCESS(rv, rv);
aWrapper->SetNotificationMask(kStandardNotificationMask |
nsIXTFElement::NOTIFY_BEGIN_ADDING_CHILDREN |
nsIXTFElement::NOTIFY_DONE_ADDING_CHILDREN);
nsCOMPtr<nsIDOMDocument> domDoc;
rv = mElement->GetOwnerDocument(getter_AddRefs(domDoc));
NS_ENSURE_SUCCESS(rv, rv);
// Create UI element
nsCOMPtr<nsIDOMElement> domElement;
rv = domDoc->CreateElementNS(NS_LITERAL_STRING("http://www.w3.org/1999/xhtml"),
NS_LITERAL_STRING("div"),
getter_AddRefs(domElement));
NS_ENSURE_SUCCESS(rv, rv);
mHTMLElement = do_QueryInterface(domElement);
NS_ENSURE_TRUE(mHTMLElement, NS_ERROR_FAILURE);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::GetVisualContent(nsIDOMElement **aElement)
{
NS_IF_ADDREF(*aElement = mHTMLElement);
return NS_OK;
}
// nsIXTFElement
NS_IMETHODIMP
nsXFormsRepeatElement::OnDestroyed()
{
mHTMLElement = nsnull;
mIndexUsers.Clear();
return nsXFormsControlStub::OnDestroyed();
}
NS_IMETHODIMP
nsXFormsRepeatElement::WillSetAttribute(nsIAtom *aName, const nsAString &aValue)
{
MaybeRemoveFromModel(aName);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::AttributeSet(nsIAtom *aName, const nsAString &aValue)
{
MaybeBindAndRefresh(aName);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::WillRemoveAttribute(nsIAtom *aName)
{
MaybeRemoveFromModel(aName);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::AttributeRemoved(nsIAtom *aName)
{
MaybeBindAndRefresh(aName);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::BeginAddingChildren()
{
mAddingChildren = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::DoneAddingChildren()
{
mAddingChildren = PR_FALSE;
Refresh();
return NS_OK;
}
// nsIXFormsRepeatElement
NS_IMETHODIMP
nsXFormsRepeatElement::SetIndex(PRUint32 *aIndex,
PRBool aIsRefresh)
{
NS_ENSURE_ARG(aIndex);
#ifdef DEBUG_XF_REPEAT
printf("\tSetindex to %d (current: %d, max: %d), aIsRefresh=%d\n",
*aIndex, mCurrentIndex, mMaxIndex, aIsRefresh);
#endif
nsresult rv;
// Set repeat-index
if (mIsParent) {
NS_ASSERTION(mCurrentRepeat, "How can we be a repeat parent without a child?");
// We're the parent of nested repeats, set through the correct repeat
return mCurrentRepeat->SetIndex(aIndex, aIsRefresh);
}
// Do nothing if we are not showing anything
if (mMaxIndex == 0)
return NS_OK;
if (aIsRefresh && !mCurrentIndex) {
// If we are refreshing, get existing index value from parent
NS_ASSERTION(mParent, "SetIndex with aIsRefresh == PR_TRUE for a non-nested repeat?!");
rv = mParent->GetIndex(aIndex);
NS_ENSURE_SUCCESS(rv, rv);
}
// Check min. and max. value
if (*aIndex < 1) {
*aIndex = 1;
if (!aIsRefresh)
nsXFormsUtils::DispatchEvent(mElement, eEvent_ScrollFirst);
} else if (*aIndex > mMaxIndex) {
*aIndex = mMaxIndex;
if (!aIsRefresh)
nsXFormsUtils::DispatchEvent(mElement, eEvent_ScrollLast);
}
// Do nothing if setting to existing value
if (!aIsRefresh && mCurrentIndex && *aIndex == mCurrentIndex)
return NS_OK;
#ifdef DEBUG_XF_REPEAT
printf("\tWill set index to %d\n",
*aIndex);
#endif
// Set the repeat-index
rv = SetChildIndex(*aIndex, PR_TRUE, aIsRefresh);
NS_ENSURE_SUCCESS(rv, rv);
// Unset previous repeat-index
if (mCurrentIndex) {
// We had the previous selection, unset directly
SetChildIndex(mCurrentIndex, PR_FALSE, aIsRefresh);
} if (mParent) {
// Selection is in another repeat, inform parent (it will inform the
// previous owner of its new state)
rv = mParent->SetCurrentRepeat(this, *aIndex);
NS_ENSURE_SUCCESS(rv, rv);
}
// Set current index to new value
mCurrentIndex = *aIndex;
// Inform of index change
mParent ? mParent->IndexHasChanged() : IndexHasChanged();
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::GetIndex(PRUint32 *aIndex)
{
NS_ENSURE_ARG(aIndex);
if (mParent) {
return mParent->GetIndex(aIndex);
}
*aIndex = mCurrentIndex;
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::Deselect(void)
{
if (!mCurrentIndex)
return NS_OK;
nsresult rv = SetChildIndex(mCurrentIndex, PR_FALSE);
if (NS_SUCCEEDED(rv)) {
mCurrentIndex = 0;
}
return rv;
}
NS_IMETHODIMP
nsXFormsRepeatElement::GetStartingIndex(PRUint32 *aRes)
{
NS_ENSURE_ARG(aRes);
nsresult rv = GetIntAttr(NS_LITERAL_STRING("startindex"),
(PRInt32*) aRes,
nsISchemaBuiltinType::BUILTIN_TYPE_POSITIVEINTEGER);
if (NS_FAILED(rv)) {
*aRes = 1;
}
if (*aRes < 1) {
*aRes = 1;
} else if (*aRes > mMaxIndex) {
*aRes = mMaxIndex;
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::SetCurrentRepeat(nsIXFormsRepeatElement *aRepeat,
PRUint32 aIndex)
{
// Deselect the previous owner
if (mCurrentRepeat && aRepeat != mCurrentRepeat) {
nsresult rv = mCurrentRepeat->Deselect();
NS_ENSURE_SUCCESS(rv, rv);
}
mCurrentRepeat = aRepeat;
// Check aIndex. If it is 0, we should intialize to the starting index
if (!aIndex) {
GetStartingIndex(&aIndex);
}
mCurrentIndex = aIndex;
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::GetCurrentRepeatRow(nsIDOMNode **aRow)
{
if (mCurrentRepeat) {
// nested repeats
return mCurrentRepeat->GetCurrentRepeatRow(aRow);
}
nsCOMPtr<nsIDOMNodeList> children;
NS_ENSURE_STATE(mHTMLElement);
mHTMLElement->GetChildNodes(getter_AddRefs(children));
NS_ENSURE_STATE(children);
nsCOMPtr<nsIDOMNode> child;
children->Item(mCurrentIndex - 1, // Indexes are 1-based, the DOM is 0-based
getter_AddRefs(child));
NS_IF_ADDREF(*aRow = child);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::AddIndexUser(nsIXFormsControl *aControl)
{
nsresult rv = NS_OK;
if (mIndexUsers.IndexOf(aControl) == -1 && !mIndexUsers.AppendObject(aControl))
rv = NS_ERROR_FAILURE;
return rv;
}
NS_IMETHODIMP
nsXFormsRepeatElement::RemoveIndexUser(nsIXFormsControl *aControl)
{
return mIndexUsers.RemoveObject(aControl) ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsXFormsRepeatElement::IndexHasChanged()
{
///
/// @bug We need to handle \<bind\> elements too (XXX)
// copy the index array, as index users might add/remove themselves when
// they are rebound and refreshed().
nsCOMArray<nsIXFormsControl> indexes(mIndexUsers);
for (PRInt32 i = 0; i < indexes.Count(); ++i) {
nsCOMPtr<nsIXFormsControl> control = indexes[i];
control->Bind();
control->Refresh();
}
return NS_OK;
}
// NB: CloneNode() assumes that this always succeeds
NS_IMETHODIMP
nsXFormsRepeatElement::GetIsParent(PRBool *aIsParent)
{
NS_ENSURE_ARG(aIsParent);
*aIsParent = mIsParent;
return NS_OK;
}
// NB: CloneNode() assumes that this always succeeds
NS_IMETHODIMP
nsXFormsRepeatElement::SetIsParent(PRBool aIsParent)
{
mIsParent = aIsParent;
return NS_OK;
}
// NB: CloneNode() assumes that this always succeeds
NS_IMETHODIMP
nsXFormsRepeatElement::SetParent(nsIXFormsRepeatElement *aParent)
{
mParent = aParent;
// We're an inner repeat owned by a parent, let it control whether we are
// selected or not.
Deselect();
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::GetParent(nsIXFormsRepeatElement **aParent)
{
NS_ENSURE_ARG_POINTER(aParent);
NS_IF_ADDREF(*aParent = mParent);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::SetLevel(PRUint32 aLevel)
{
mLevel = aLevel;
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::GetLevel(PRUint32 *aLevel)
{
NS_ENSURE_ARG(aLevel);
*aLevel = mLevel;
return NS_OK;
}
// nsXFormsControl
NS_IMETHODIMP
nsXFormsRepeatElement::Bind()
{
if (mAddingChildren)
return NS_OK;
mModel = nsXFormsUtils::GetModel(mElement);
if (mModel)
mModel->AddFormControl(this);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::Refresh()
{
if (!mHTMLElement || mAddingChildren || mIsParent)
return NS_OK;
nsPostRefresh postRefresh = nsPostRefresh();
nsresult rv;
// Clear any existing children
nsCOMPtr<nsIDOMNode> cNode;
mHTMLElement->GetFirstChild(getter_AddRefs(cNode));
while (cNode) {
nsCOMPtr<nsIDOMNode> retNode;
mHTMLElement->RemoveChild(cNode, getter_AddRefs(retNode));
mHTMLElement->GetFirstChild(getter_AddRefs(cNode));
}
// Get the nodeset we are bound to
nsCOMPtr<nsIDOMXPathResult> result;
nsCOMPtr<nsIModelElementPrivate> model;
rv = ProcessNodeBinding(NS_LITERAL_STRING("nodeset"),
nsIDOMXPathResult::ORDERED_NODE_SNAPSHOT_TYPE,
getter_AddRefs(result),
getter_AddRefs(model));
if (NS_FAILED(rv) | !result | !model)
return rv;
/// @todo The spec says: "This node-set must consist of contiguous child
/// element nodes, with the same local name and namespace name of a common
/// parent node. The behavior of element repeat with respect to
/// non-homogeneous node-sets is undefined."
/// @see http://www.w3.org/TR/xforms/slice9.html#ui-repeat
///
/// Can/should we check this somehow? (XXX)
PRUint32 contextSize;
rv = result->GetSnapshotLength(&contextSize);
NS_ENSURE_SUCCESS(rv, rv);
if (!contextSize)
return NS_OK;
// Get model ID
nsCOMPtr<nsIDOMElement> modelElement = do_QueryInterface(model);
NS_ENSURE_TRUE(modelElement, NS_ERROR_FAILURE);
nsAutoString modelID;
modelElement->GetAttribute(NS_LITERAL_STRING("id"), modelID);
// Get DOM document
nsCOMPtr<nsIDOMDocument> domDoc;
rv = mHTMLElement->GetOwnerDocument(getter_AddRefs(domDoc));
NS_ENSURE_SUCCESS(rv, rv);
mMaxIndex = contextSize;
for (PRUint32 i = 1; i < mMaxIndex + 1; ++i) {
// Create <contextcontainer>
nsCOMPtr<nsIDOMElement> riElement;
rv = domDoc->CreateElementNS(NS_LITERAL_STRING("http://www.w3.org/2002/xforms"),
NS_LITERAL_STRING("contextcontainer"),
getter_AddRefs(riElement));
NS_ENSURE_SUCCESS(rv, rv);
// Set model as attribute
if (!modelID.IsEmpty()) {
riElement->SetAttribute(NS_LITERAL_STRING("model"), modelID);
}
// Get context node
nsCOMPtr<nsIXFormsContextControl> riContext = do_QueryInterface(riElement);
NS_ENSURE_TRUE(riContext, NS_ERROR_FAILURE);
nsCOMPtr<nsIDOMNode> contextNode;
rv = result->SnapshotItem(i - 1, getter_AddRefs(contextNode));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMElement> contextElement = do_QueryInterface(contextNode);
NS_ENSURE_TRUE(contextElement, NS_ERROR_FAILURE);
// Set context node, position, and size
rv = riContext->SetContext(contextElement, i, contextSize);
NS_ENSURE_SUCCESS(rv, rv);
// Iterate over template children, clone them, and append them to <contextcontainer>
nsCOMPtr<nsIDOMNode> child;
rv = mElement->GetFirstChild(getter_AddRefs(child));
NS_ENSURE_SUCCESS(rv, rv);
while (child) {
nsCOMPtr<nsIDOMNode> childClone;
rv = CloneNode(child, getter_AddRefs(childClone));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> newNode;
rv = riElement->AppendChild(childClone, getter_AddRefs(newNode));
NS_ENSURE_SUCCESS(rv, rv);
rv = child->GetNextSibling(getter_AddRefs(newNode));
NS_ENSURE_SUCCESS(rv, rv);
child = newNode;
}
// Append node
nsCOMPtr<nsIDOMNode> domNode;
rv = mHTMLElement->AppendChild(riElement, getter_AddRefs(domNode));
NS_ENSURE_SUCCESS(rv, rv);
// There is an awfull lot of evaluating being done by all the
// children, as they are created and inserted into the different
// places in the DOM, the only refresh necessary is the one when they
// are appended in mHTMLElement.
}
if (!mParent && !mCurrentIndex && mMaxIndex) {
// repeat-index has not been initialized, set it.
GetStartingIndex(&mCurrentIndex);
}
// If we have the repeat-index, set it.
if (mCurrentIndex) {
SetChildIndex(mCurrentIndex, PR_TRUE, PR_TRUE);
}
return NS_OK;
}
// nsXFormsRepeatElement
nsresult
nsXFormsRepeatElement::SetChildIndex(PRUint32 aPosition,
PRBool aState,
PRBool aIsRefresh)
{
#ifdef DEBUG_XF_REPEAT
printf("\tTrying to set index #%d to state '%d', aIsRefresh=%d\n",
aPosition, aState, aIsRefresh);
#endif
if (!mHTMLElement)
return NS_OK;
nsCOMPtr<nsIDOMNodeList> children;
mHTMLElement->GetChildNodes(getter_AddRefs(children));
NS_ENSURE_STATE(children);
nsCOMPtr<nsIDOMNode> child;
children->Item(aPosition - 1, // Indexes are 1-based, the DOM is 0-based
getter_AddRefs(child));
nsCOMPtr<nsIXFormsRepeatItemElement> repeatItem = do_QueryInterface(child);
NS_ENSURE_STATE(repeatItem);
nsresult rv;
PRBool curState;
rv = repeatItem->GetIndexState(&curState);
NS_ENSURE_SUCCESS(rv, rv);
if (curState != aState) {
rv = repeatItem->SetIndexState(aState);
NS_ENSURE_SUCCESS(rv, rv);
if (aState) {
// Reset inner repeats
rv = ResetInnerRepeats(child, aIsRefresh);
NS_ENSURE_SUCCESS(rv, rv);
}
}
return NS_OK;
}
nsresult
nsXFormsRepeatElement::ResetInnerRepeats(nsIDOMNode *aNode,
PRBool aIsRefresh)
{
#ifdef DEBUG_XF_REPEAT
printf("\taIsRefresh: %d\n",
aIsRefresh);
#endif
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(aNode);
if (!element)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMNodeList> nodeList;
nsresult rv;
rv = element->GetElementsByTagNameNS(NS_LITERAL_STRING(NS_NAMESPACE_XFORMS),
NS_LITERAL_STRING("repeat"),
getter_AddRefs(nodeList));
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 childCount = 0;
nodeList->GetLength(&childCount);
nsCOMPtr<nsIDOMNode> node;
nsCOMPtr<nsIXFormsRepeatElement> repeat;
for (PRUint32 i = 0; i < childCount; ++i) {
nodeList->Item(i, getter_AddRefs(node));
repeat = do_QueryInterface(node);
NS_ENSURE_STATE(repeat);
PRUint32 level;
repeat->GetLevel(&level);
if (level == mLevel + 1) {
PRUint32 index;
repeat->GetStartingIndex(&index);
repeat->SetIndex(&index, aIsRefresh);
}
}
return NS_OK;
}
nsresult
nsXFormsRepeatElement::CloneNode(nsIDOMNode *aSrc,
nsIDOMNode **aTarget)
{
NS_ENSURE_ARG(aSrc);
NS_ENSURE_ARG_POINTER(aTarget);
// Clone aSrc
nsresult rv;
rv = aSrc->CloneNode(PR_FALSE, aTarget);
NS_ENSURE_SUCCESS(rv, rv);
// Check whether we have cloned a repeat
if (nsXFormsUtils::IsXFormsElement(aSrc, NS_LITERAL_STRING("repeat"))) {
nsCOMPtr<nsIXFormsRepeatElement> repSource = do_QueryInterface(aSrc);
NS_ENSURE_STATE(repSource);
nsCOMPtr<nsIXFormsRepeatElement> repClone = do_QueryInterface(*aTarget);
NS_ENSURE_STATE(repClone);
// Find top-most parent of these repeats
nsCOMPtr<nsIXFormsRepeatElement> parent = repSource;
nsCOMPtr<nsIXFormsRepeatElement> temp;
rv = parent->GetParent(getter_AddRefs(temp));
NS_ENSURE_SUCCESS(rv, rv);
while (temp) {
temp.swap(parent);
rv = parent->GetParent(getter_AddRefs(temp));
NS_ENSURE_SUCCESS(rv, rv);
}
// Set parent and level on clone
PRUint32 level;
repSource->GetLevel(&level);
repClone->SetLevel(level + 1);
repClone->SetParent(parent);
// Inform parent of new status, if it does not know already
PRBool isParent;
parent->GetIsParent(&isParent);
if (!isParent) {
rv = parent->SetCurrentRepeat(repClone, 0);
NS_ENSURE_SUCCESS(rv, rv);
parent->SetIsParent(PR_TRUE);
}
}
// Clone children of aSrc
nsCOMPtr<nsIDOMNode> tmp;
nsCOMPtr<nsIDOMNodeList> childNodes;
aSrc->GetChildNodes(getter_AddRefs(childNodes));
PRUint32 count = 0;
if (childNodes)
childNodes->GetLength(&count);
for (PRUint32 i = 0; i < count; ++i) {
nsCOMPtr<nsIDOMNode> child;
childNodes->Item(i, getter_AddRefs(child));
if (child) {
nsCOMPtr<nsIDOMNode> clone;
CloneNode(child, getter_AddRefs(clone));
if (clone) {
rv = (*aTarget)->AppendChild(clone, getter_AddRefs(tmp));
NS_ENSURE_SUCCESS(rv, rv);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::TryFocus(PRBool *aOK)
{
if (!mCurrentIndex) {
*aOK = PR_FALSE;
return NS_OK;
}
/**
* "Setting focus to a repeating structure sets the focus to
* the repeat item represented by the repeat index."
* @see http://www.w3.org/TR/xforms/slice10.html#action-setfocus
*/
nsCOMPtr<nsIDOMNodeList> children;
mHTMLElement->GetChildNodes(getter_AddRefs(children));
NS_ENSURE_STATE(children);
nsCOMPtr<nsIDOMNode> child;
children->Item(mCurrentIndex - 1, // Indexes are 1-based, the DOM is 0-based
getter_AddRefs(child));
nsCOMPtr<nsIXFormsControl> control = do_QueryInterface(child);
NS_ENSURE_STATE(control);
return control->TryFocus(aOK);
}
NS_IMETHODIMP
nsXFormsRepeatElement::IsEventTarget(PRBool *aOK)
{
*aOK = PR_FALSE;
return NS_OK;
}
/**
* @todo This function will be part of the general schema support, so it will
* only live here until this is implemented there. (XXX)
*/
nsresult
nsXFormsRepeatElement::GetIntAttr(const nsAString &aName,
PRInt32 *aVal,
const PRUint16 aType)
{
nsresult rv = NS_OK;
NS_ENSURE_ARG_POINTER(aVal);
nsAutoString attrVal;
mElement->GetAttribute(aName, attrVal);
/// @todo Is this the correct error to return? We need to distinguish between
/// an empty attribute and other errors. (XXX)
if (attrVal.IsEmpty()) {
return NS_ERROR_NOT_AVAILABLE;
}
PRInt32 errCode;
/// @todo ToInteger is extremely large, "xxx23xxx" will be parsed with no errors
/// as "23"... (XXX)
*aVal = attrVal.ToInteger(&errCode);
NS_ENSURE_TRUE(errCode == 0, NS_ERROR_FAILURE);
///
/// @todo Check maximum values? (XXX)
switch (aType) {
case nsISchemaBuiltinType::BUILTIN_TYPE_NONNEGATIVEINTEGER:
if (*aVal < 0) {
rv = NS_ERROR_FAILURE;
}
break;
case nsISchemaBuiltinType::BUILTIN_TYPE_POSITIVEINTEGER:
if (*aVal <= 0) {
rv = NS_ERROR_FAILURE;
}
break;
case nsISchemaBuiltinType::BUILTIN_TYPE_ANYTYPE:
break;
default:
rv = NS_ERROR_INVALID_ARG; // or NOT_IMPLEMENTED?
break;
}
return rv;
}
void nsXFormsRepeatElement::MaybeBindAndRefresh(nsIAtom *aName)
{
if (aName == nsXFormsAtoms::bind ||
aName == nsXFormsAtoms::nodeset ||
aName == nsXFormsAtoms::model) {
Bind();
Refresh();
}
}
void nsXFormsRepeatElement::MaybeRemoveFromModel(nsIAtom *aName)
{
if (aName == nsXFormsAtoms::bind ||
aName == nsXFormsAtoms::nodeset ||
aName == nsXFormsAtoms::model) {
if (mModel) {
mModel->RemoveFormControl(this);
}
}
}
// Factory
NS_HIDDEN_(nsresult)
NS_NewXFormsRepeatElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsRepeatElement();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
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