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pjs/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 "nsAutoPtr.h"
#include "nsCOMPtr.h"
#include "nsINameSpaceManager.h"
#include "nsISchema.h"
#include "nsIServiceManager.h"
#include "nsMemory.h"
#include "nsStringAPI.h"
#include "nsIDOM3EventTarget.h"
#include "nsIDOM3Node.h"
#include "nsIDOMDocument.h"
#include "nsIDOMElement.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMXPathResult.h"
#include "nsIContent.h"
#include "nsXFormsControlStub.h"
#include "nsIXFormsContextControl.h"
#include "nsIXFormsRepeatElement.h"
#include "nsIXFormsRepeatUIElement.h"
#include "nsIXFormsRepeatItemElement.h"
#include "nsXFormsAtoms.h"
#include "nsXFormsModelElement.h"
#include "nsXFormsUtils.h"
#include "nsXFormsDelegateStub.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 mElement)
* 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.
*
* 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) (XBL)
* <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) (XBL)
* </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 nsXFormsDelegateStub,
public nsIXFormsRepeatElement
{
protected:
/**
* 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;
/**
* The number of "repeat rows" the repeat currently have unrolled.
*/
PRUint32 mCurrentRowCount;
/**
* True while children are being added
*/
PRPackedBool mAddingChildren;
/**
* Are we a parent for nested repeats
*/
PRPackedBool mIsParent;
/**
* Is the repeat attribute-based (ie. created by using xf:repeat-*
* attributes).
*
* @see http://www.w3.org/TR/xforms/slice9.html#ui.repeat.via.attrs
*/
PRPackedBool mIsAttributeBased;
/**
* If this repeat is attribute based that means it is contained by certain
* element that have repeat related attributes (see
* http://www.w3.org/TR/xforms/slice9.html#ui.repeat.via.attrs) then
* this property is a clone of that element exepting it doens't have any
* repeat related attributes. Otherwise value of this property is null. Used
* in InsertTemplateContent() method.
*/
nsCOMPtr<nsIDOMNode> mAttrBasedRepeatNode;
/**
* 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);
PRBool IsBindingAttribute(const nsIAtom *aAttr) const;
/**
* Make sure that an index value is inside the valid index range.
*
* @param aIndex The index value to sanitize
* @param aIsScroll Send scroll events if first or last index?
*/
void SanitizeIndex(PRUint32 *aIndex, PRBool aIsScroll = PR_FALSE);
/**
* Unroll the template content into the visual rows by cloning template
* content and inserting into contextcontainers.
*/
nsresult UnrollRows(nsIDOMXPathResult *aNodeset);
/**
* Returns either the anonymous content of the repeat or null;
*/
already_AddRefed<nsIDOMElement> GetAnonymousContent();
/**
* Insert the template content for a repeat node into the given node.
*
* @param aNode The node to insert content into.
*/
nsresult InsertTemplateContent(nsIDOMNode *aNode);
// nsXFormsControlStub override
virtual void AfterSetAttribute(nsIAtom *aName);
/**
* Override of nsXFormsStubElement's function. Needed to properly handle
* the case where the repeat is generated as anonymous content to
* elements with repeat attrs on them.
*
* @param aParent The new parent of the XForms control
*/
nsRepeatState UpdateRepeatState(nsIDOMNode *aParent);
public:
NS_DECL_ISUPPORTS_INHERITED
// nsIXTFElement overrides
NS_IMETHOD OnCreated(nsIXTFElementWrapper *aWrapper);
// nsIXTFElement overrides
NS_IMETHOD OnDestroyed();
NS_IMETHOD BeginAddingChildren();
NS_IMETHOD DoneAddingChildren();
// nsIXFormsControl
NS_IMETHOD Bind(PRBool *aContextChanged);
NS_IMETHOD Refresh();
NS_IMETHOD TryFocus(PRBool* aOK);
NS_IMETHOD IsEventTarget(PRBool *aOK);
NS_IMETHOD GetUsesSingleNodeBinding(PRBool *aUsesSNB);
// nsIXFormsRepeatElement
NS_DECL_NSIXFORMSREPEATELEMENT
// nsXFormsRepeatElement
nsXFormsRepeatElement() :
mCurrentIndex(0),
mMaxIndex(0),
mLevel(1),
mCurrentRowCount(0),
mAddingChildren(PR_FALSE),
mIsParent(PR_FALSE),
mIsAttributeBased(PR_FALSE)
{}
#ifdef DEBUG_smaug
virtual const char* Name() { return "repeat"; }
#endif
};
NS_IMPL_ISUPPORTS_INHERITED1(nsXFormsRepeatElement,
nsXFormsDelegateStub,
nsIXFormsRepeatElement)
// nsIXTFBindableElement
NS_IMETHODIMP
nsXFormsRepeatElement::OnCreated(nsIXTFElementWrapper *aWrapper)
{
#ifdef DEBUG_XF_REPEAT
printf("nsXFormsRepeatElement::OnCreated()\n");
#endif
nsresult rv = nsXFormsDelegateStub::OnCreated(aWrapper);
NS_ENSURE_SUCCESS(rv, rv);
aWrapper->SetNotificationMask(kStandardNotificationMask |
nsIXTFElement::NOTIFY_BEGIN_ADDING_CHILDREN |
nsIXTFElement::NOTIFY_DONE_ADDING_CHILDREN);
return NS_OK;
}
// nsIXTFElement
NS_IMETHODIMP
nsXFormsRepeatElement::OnDestroyed()
{
mIndexUsers.Clear();
return nsXFormsDelegateStub::OnDestroyed();
}
NS_IMETHODIMP
nsXFormsRepeatElement::BeginAddingChildren()
{
mAddingChildren = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::DoneAddingChildren()
{
mAddingChildren = PR_FALSE;
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) {
SanitizeIndex(aIndex, PR_TRUE);
mCurrentIndex = *aIndex;
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
SanitizeIndex(aIndex, PR_TRUE);
// 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 (mIsParent) {
if (!mCurrentRepeat) {
*aIndex = 0;
return NS_OK;
}
return mCurrentRepeat->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;
}
SanitizeIndex(aRes);
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<nsIDOMElement> anon = GetAnonymousContent();
NS_ENSURE_STATE(anon);
nsCOMPtr<nsIDOMNodeList> children;
anon->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()
{
NS_ENSURE_STATE(mModel);
///
/// @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);
nsresult rv;
for (PRInt32 i = 0; i < indexes.Count(); ++i) {
nsCOMPtr<nsIXFormsControl> control = indexes[i];
rv = mModel->ForceRebind(control);
NS_ENSURE_SUCCESS(rv, rv);
}
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;
}
NS_IMETHODIMP
nsXFormsRepeatElement::HandleNodeInsert(nsIDOMNode *aNode)
{
nsCOMPtr<nsIDOMElement> anon = GetAnonymousContent();
if (!anon) {
return NS_OK;
}
nsCOMPtr<nsIDOM3Node> node(do_QueryInterface(aNode));
NS_ENSURE_STATE(node);
// XXX, badness^2: If it is a insert we have to refresh before we can
// figure out whether the node is in our nodeset... refactor this so
// repeat actually gets the nodeset in Bind() and then uses it refresh,
// then we can "just" re-evaluate the nodeset, and only refresh if the
// node actually hits this repeat
// XXX, moreover it is also wrong to refresh at this point. It will happen
// in insert processing (and possibly deferred...)
nsresult rv = Refresh();
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> child;
anon->GetFirstChild(getter_AddRefs(child));
PRUint32 index = 1;
while (child) {
nsCOMPtr<nsIXFormsContextControl> context(do_QueryInterface(child));
NS_ASSERTION(context,
"repeat child not implementing nsIXFormsContextControl?!");
nsAutoString modelID;
PRInt32 position, size;
nsCOMPtr<nsIDOMNode> boundNode;
rv = context->GetContext(modelID, getter_AddRefs(boundNode), &position,
&size);
NS_ENSURE_SUCCESS(rv, rv);
PRBool sameNode = PR_FALSE;
node->IsSameNode(boundNode, &sameNode);
if (sameNode) {
rv = SetIndex(&index, PR_FALSE);
NS_ENSURE_SUCCESS(rv, rv);
break;
}
nsCOMPtr<nsIDOMNode> tmp;
child->GetNextSibling(getter_AddRefs(tmp));
child.swap(tmp);
++index;
}
return NS_OK;
}
// nsXFormsControl
NS_IMETHODIMP
nsXFormsRepeatElement::Bind(PRBool *aContextChanged)
{
#ifdef DEBUG_XF_REPEAT
printf("nsXFormsRepeatElement::Bind()\n");
#endif
NS_ENSURE_ARG(aContextChanged);
if (!nsXFormsUtils::IsDocumentReadyForBind(mElement)) {
nsXFormsModelElement::DeferElementBind(this);
*aContextChanged = PR_FALSE;
return NS_OK_XFORMS_DEFERRED;
}
nsresult rv = BindToModel();
NS_ENSURE_SUCCESS(rv, rv);
*aContextChanged = PR_TRUE;
return NS_OK;
}
nsresult
nsXFormsRepeatElement::InsertTemplateContent(nsIDOMNode *aNode)
{
NS_ENSURE_ARG_POINTER(aNode);
nsresult rv;
// If we are attribute based we need to clone our parent (the element with
// the repeat-* attributes), and insert that as the first child.
if (mIsAttributeBased) {
nsCOMPtr<nsIDOMNode> clonedNode;
rv = mAttrBasedRepeatNode->CloneNode(PR_TRUE, getter_AddRefs(clonedNode));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> stubNode;
return aNode->AppendChild(clonedNode, getter_AddRefs(stubNode));
}
nsCOMPtr<nsIDOMDocument> domDocument;
mElement->GetOwnerDocument(getter_AddRefs(domDocument));
NS_ENSURE_STATE(domDocument);
nsCOMPtr<nsIDocument> document(do_QueryInterface(domDocument));
nsCOMPtr<nsIContent> content(do_QueryInterface(mElement));
NS_ENSURE_STATE(content);
// Get a list of all explicit children, including any children that may have
// been inserted via XBL insertion points.
nsCOMPtr<nsIDOMNodeList> children;
document->GetContentListFor(content, getter_AddRefs(children));
PRUint32 length = 0;
children->GetLength(&length);
for (PRUint32 i = 0; i < length; i++) {
nsCOMPtr<nsIDOMNode> node;
rv = children->Item(i, getter_AddRefs(node));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> clonedNode;
rv = CloneNode(node, getter_AddRefs(clonedNode));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> stubNode;
rv = aNode->AppendChild(clonedNode, getter_AddRefs(stubNode));
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
// XXX: If repeat is moved to a new position, we need to clear the unrolled
// content and clear mAttrBasedRepeatNode.
nsresult
nsXFormsRepeatElement::UnrollRows(nsIDOMXPathResult *aNodeset)
{
#ifdef DEBUG_XF_REPEAT
printf("nsXFormsRepeatElement::UnrollRows()\n");
#endif
NS_ENSURE_STATE(mElement);
nsCOMPtr<nsIDOMElement> anon = GetAnonymousContent();
if (!anon) {
return NS_OK;
}
nsresult rv;
if (!aNodeset || !mModel) {
mMaxIndex = 0;
} else {
PRUint32 contextSize;
rv = aNodeset->GetSnapshotLength(&contextSize);
NS_ENSURE_SUCCESS(rv, rv);
mMaxIndex = contextSize;
}
#ifdef DEBUG_XF_REPEAT
printf("\tmMaxIndex: %d, mCurrentRowCount: %d\n",
mMaxIndex, mCurrentRowCount);
#endif
// STEP 1: Remove rows
nsCOMPtr<nsIDOMNode> tmp;
if (mMaxIndex < mCurrentRowCount) {
for (PRUint32 i = mMaxIndex; i < mCurrentRowCount; ++i) {
nsCOMPtr<nsIDOMNode> lastChild;
rv = anon->GetLastChild(getter_AddRefs(lastChild));
NS_ENSURE_SUCCESS(rv, rv);
rv = anon->RemoveChild(lastChild, getter_AddRefs(tmp));
NS_ENSURE_SUCCESS(rv, rv);
}
} else if (mMaxIndex > mCurrentRowCount) {
// STEP 2: Add rows
nsCOMPtr<nsIDOMDocument> domDoc;
rv = anon->GetOwnerDocument(getter_AddRefs(domDoc));
NS_ENSURE_SUCCESS(rv, rv);
for (PRUint32 i = mCurrentRowCount; i < mMaxIndex; ++i) {
// Create <contextcontainer>
nsCOMPtr<nsIDOMElement> container;
rv = domDoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XFORMS),
NS_LITERAL_STRING("contextcontainer"),
getter_AddRefs(container));
NS_ENSURE_SUCCESS(rv, rv);
container->SetAttribute(NS_LITERAL_STRING("class"),
NS_LITERAL_STRING("xf-repeat-item"));
rv = anon->AppendChild(container, getter_AddRefs(tmp));
NS_ENSURE_SUCCESS(rv, rv);
}
}
// Repeat has no content
if (!mMaxIndex) {
mCurrentRowCount = 0;
return NS_OK;
}
// STEP 3: Update context on rows
nsCOMPtr<nsIDOMNode> child;
rv = anon->GetFirstChild(getter_AddRefs(child));
NS_ENSURE_SUCCESS(rv, rv);
for (PRUint32 i = 0; i < mMaxIndex; ++i) {
NS_ASSERTION(child, "Unrolled content does not match index size?!");
// Get context node
nsCOMPtr<nsIDOMNode> contextNode;
rv = aNodeset->SnapshotItem(i, getter_AddRefs(contextNode));
NS_ENSURE_SUCCESS(rv, rv);
// Set context node, position, and size
nsCOMPtr<nsIXFormsContextControl> childContext = do_QueryInterface(child);
NS_ASSERTION(childContext,
"content child not implementing nsIXFormsContextControl?!");
rv = childContext->SetContext(contextNode, i + 1, mMaxIndex);
NS_ENSURE_SUCCESS(rv, rv);
// Next child
rv = child->GetNextSibling(getter_AddRefs(tmp));
NS_ENSURE_SUCCESS(rv, rv);
tmp.swap(child);
}
// Rows deleted, nothing more to do
if (mCurrentRowCount >= mMaxIndex) {
mCurrentRowCount = mMaxIndex;
return NS_OK;
}
// STEP 4: Insert template content into newly created rows
// If we are attribute based, prepare a clone of our parent
if (mIsAttributeBased && !mAttrBasedRepeatNode) {
nsCOMPtr<nsIContent> content(do_QueryInterface(mElement));
NS_ENSURE_STATE(content);
nsCOMPtr<nsIContent> templateContent = content->GetBindingParent();
NS_ENSURE_STATE(templateContent);
nsCOMPtr<nsIDOMNode> templateNode(do_QueryInterface(templateContent));
NS_ENSURE_STATE(templateNode);
rv = CloneNode(templateNode, getter_AddRefs(mAttrBasedRepeatNode));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMElement> clonedElm(do_QueryInterface(mAttrBasedRepeatNode));
NS_ENSURE_STATE(clonedElm);
// Remove all possible repeat-* attributes
clonedElm->RemoveAttributeNS(NS_LITERAL_STRING(NS_NAMESPACE_XFORMS),
NS_LITERAL_STRING("repeat-model"));
clonedElm->RemoveAttributeNS(NS_LITERAL_STRING(NS_NAMESPACE_XFORMS),
NS_LITERAL_STRING("repeat-bind"));
clonedElm->RemoveAttributeNS(NS_LITERAL_STRING(NS_NAMESPACE_XFORMS),
NS_LITERAL_STRING("repeat-nodeset"));
clonedElm->RemoveAttributeNS(NS_LITERAL_STRING(NS_NAMESPACE_XFORMS),
NS_LITERAL_STRING("repeat-startindex"));
clonedElm->RemoveAttributeNS(NS_LITERAL_STRING(NS_NAMESPACE_XFORMS),
NS_LITERAL_STRING("repeat-number"));
}
nsCOMPtr<nsIDOMNodeList> containerList;
rv = anon->GetChildNodes(getter_AddRefs(containerList));
NS_ENSURE_SUCCESS(rv, rv);
for (PRUint32 j = mCurrentRowCount; j < mMaxIndex; ++j) {
nsCOMPtr<nsIDOMNode> container;
rv = containerList->Item(j, getter_AddRefs(container));
NS_ENSURE_SUCCESS(rv, rv);
rv = InsertTemplateContent(container);
NS_ENSURE_SUCCESS(rv, rv);
}
mCurrentRowCount = mMaxIndex;
return NS_OK;
}
NS_IMETHODIMP
nsXFormsRepeatElement::Refresh()
{
#ifdef DEBUG_XF_REPEAT
printf("nsXFormsRepeatElement::Refresh()\n");
#endif
if (mAddingChildren || mIsParent)
return NS_OK;
nsPostRefresh postRefresh = nsPostRefresh();
PRUint32 oldIndex = mCurrentIndex;
/// @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)
// Get the nodeset we are bound to
nsresult rv;
nsCOMPtr<nsIDOMXPathResult> result;
rv = ProcessNodeBinding(NS_LITERAL_STRING("nodeset"),
nsIDOMXPathResult::ORDERED_NODE_SNAPSHOT_TYPE,
getter_AddRefs(result));
NS_ENSURE_SUCCESS(rv, rv);
// Unroll the repeat rows
rv = UnrollRows(result);
NS_ENSURE_SUCCESS(rv, rv);
// Maintain the index
if (mCurrentIndex || !mMaxIndex) {
// Somebody might have been fooling around with our children since last
// refresh (either using delete or through script). Or we might have an
// empty nodeset. So fix the index value.
SanitizeIndex(&mCurrentIndex);
} else if (mMaxIndex) {
// repeat-index has not been initialized, set it.
if (!mParent) {
GetStartingIndex(&mCurrentIndex);
// Inform listeners of initial index value
IndexHasChanged();
} else if (mLevel > 1) {
// Set repeat-index for inner repeats. If parent <contextcontainer/>
// element is selected then mCurrentIndex is setted on starting index.
nsCOMPtr<nsIDOMNode> temp = mElement;
nsCOMPtr<nsIDOMNode> parent;
nsCOMPtr<nsIXFormsRepeatItemElement> context;
while (!context) {
rv = temp->GetParentNode(getter_AddRefs(parent));
NS_ENSURE_SUCCESS(rv, rv);
if (!parent)
break;
context = do_QueryInterface(parent);
temp.swap(parent);
}
if (context) {
PRBool hasIndex = PR_FALSE;
context->GetIndexState(&hasIndex);
if (hasIndex) {
PRUint32 index = 0;
GetStartingIndex(&index);
SetIndex(&index, PR_FALSE);
}
}
return NS_OK;
}
}
// If we have the repeat-index, set it.
if (mCurrentIndex) {
SetChildIndex(mCurrentIndex, PR_TRUE, PR_TRUE);
}
if (mCurrentIndex != oldIndex) {
mParent ? mParent->IndexHasChanged() : IndexHasChanged();
}
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
nsCOMPtr<nsIDOMElement> anon = GetAnonymousContent();
if (!anon)
return NS_OK;
nsCOMPtr<nsIDOMNodeList> children;
anon->GetChildNodes(getter_AddRefs(children));
NS_ENSURE_STATE(children);
PRUint32 index = aPosition - 1; // Indexes are 1-based, the DOM is 0-based;
nsCOMPtr<nsIDOMNode> child;
children->Item(index,
getter_AddRefs(child));
nsCOMPtr<nsIXFormsRepeatItemElement> repeatItem(do_QueryInterface(child));
NS_ASSERTION(repeatItem,
"repeat child not implementing nsIXFormsRepeatItemElement?!");
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;
}
void
nsXFormsRepeatElement::SanitizeIndex(PRUint32 *aIndex, PRBool aIsScroll)
{
if (!aIndex)
return;
#ifdef DEBUG_XF_REPEAT
printf("nsXFormsRepeatElement::SanitizeIndex()\n");
printf("\tCurrent index: %d\n", *aIndex);
#endif
if (*aIndex < 1) {
*aIndex = mMaxIndex ? 1 : 0;
if (aIsScroll)
nsXFormsUtils::DispatchEvent(mElement, eEvent_ScrollFirst);
} else if (*aIndex > mMaxIndex) {
*aIndex = mMaxIndex;
if (aIsScroll)
nsXFormsUtils::DispatchEvent(mElement, eEvent_ScrollLast);
}
#ifdef DEBUG_XF_REPEAT
printf("\tNew index: %d\n", *aIndex);
#endif
}
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;
nsCOMPtr<nsIDOMElement> anon = GetAnonymousContent();
NS_ENSURE_STATE(anon);
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;
}
nsCOMPtr<nsIDOMElement> anon = GetAnonymousContent();
if (!anon)
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;
anon->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;
}
NS_IMETHODIMP
nsXFormsRepeatElement::GetUsesSingleNodeBinding(PRBool *aUsesSNB)
{
NS_ENSURE_ARG_POINTER(aUsesSNB);
*aUsesSNB = 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;
}
/// @todo ToInteger is extremely large, "xxx23xxx" will be parsed with no errors
/// as "23"... (XXX)
*aVal = attrVal.ToInteger(&rv);
NS_ENSURE_SUCCESS(rv, rv);
///
/// @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;
}
PRBool
nsXFormsRepeatElement::IsBindingAttribute(const nsIAtom *aAttr) const
{
if (aAttr == nsXFormsAtoms::bind ||
aAttr == nsXFormsAtoms::nodeset ||
aAttr == nsXFormsAtoms::model) {
return PR_TRUE;
}
return PR_FALSE;
}
void
nsXFormsRepeatElement::AfterSetAttribute(nsIAtom *aName)
{
if (aName == nsXFormsAtoms::attrBased) {
PRBool isAttributeBased;
nsresult rv =
mElement->HasAttributeNS(NS_LITERAL_STRING(NS_NAMESPACE_MOZ_XFORMS_TYPE),
NS_LITERAL_STRING("attrBased"),
&isAttributeBased);
if (NS_SUCCEEDED(rv))
mIsAttributeBased = isAttributeBased;
}
nsXFormsDelegateStub::AfterSetAttribute(aName);
}
already_AddRefed<nsIDOMElement>
nsXFormsRepeatElement::GetAnonymousContent()
{
nsIDOMElement* anon = nsnull;
nsCOMPtr<nsIXFormsRepeatUIElement> uiElement(do_QueryInterface(mElement));
if (uiElement) {
// addrefs
uiElement->GetAnonymousRepeatContent(&anon);
}
return anon;
}
nsRepeatState
nsXFormsRepeatElement::UpdateRepeatState(nsIDOMNode *aParent)
{
// If the repeat is attribute based, then it is generated by anonymous
// content. In that case its repeat type is eType_NotApplicable. Otherwise,
// calculate the repeat state using the normal logic.
nsRepeatState repeatState = eType_Unknown;
if (aParent) {
PRBool isAttributeBased = PR_FALSE;
nsresult rv =
mElement->HasAttributeNS(NS_LITERAL_STRING(NS_NAMESPACE_MOZ_XFORMS_TYPE),
NS_LITERAL_STRING("attrBased"),
&isAttributeBased);
if (NS_SUCCEEDED(rv)) {
// if repeat is attribute based, it won't go through the normal
// attribute change processing, so should set the mIsAttributeBased
// variable here
mIsAttributeBased = isAttributeBased;
if (isAttributeBased) {
repeatState = eType_NotApplicable;
SetRepeatState(repeatState);
return repeatState;
}
}
}
return nsXFormsStubElement::UpdateRepeatState(aParent);
}
// 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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