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gecko-dev
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gecko-dev/layout/xul/tree/nsTreeContentView.cpp

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39 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsNameSpaceManager.h"
#include "nsGkAtoms.h"
#include "nsTreeUtils.h"
#include "nsTreeContentView.h"
#include "ChildIterator.h"
#include "nsError.h"
#include "nsXULSortService.h"
#include "nsTreeBodyFrame.h"
#include "nsTreeColumns.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/TreeContentViewBinding.h"
#include "mozilla/dom/XULTreeElement.h"
#include "nsServiceManagerUtils.h"
#include "mozilla/dom/Document.h"
using namespace mozilla;
using namespace mozilla::dom;
// A content model view implementation for the tree.
#define ROW_FLAG_CONTAINER 0x01
#define ROW_FLAG_OPEN 0x02
#define ROW_FLAG_EMPTY 0x04
#define ROW_FLAG_SEPARATOR 0x08
class Row {
public:
Row(Element* aContent, int32_t aParentIndex)
: mContent(aContent),
mParentIndex(aParentIndex),
mSubtreeSize(0),
mFlags(0) {}
~Row() = default;
void SetContainer(bool aContainer) {
aContainer ? mFlags |= ROW_FLAG_CONTAINER : mFlags &= ~ROW_FLAG_CONTAINER;
}
bool IsContainer() { return mFlags & ROW_FLAG_CONTAINER; }
void SetOpen(bool aOpen) {
aOpen ? mFlags |= ROW_FLAG_OPEN : mFlags &= ~ROW_FLAG_OPEN;
}
bool IsOpen() { return !!(mFlags & ROW_FLAG_OPEN); }
void SetEmpty(bool aEmpty) {
aEmpty ? mFlags |= ROW_FLAG_EMPTY : mFlags &= ~ROW_FLAG_EMPTY;
}
bool IsEmpty() { return !!(mFlags & ROW_FLAG_EMPTY); }
void SetSeparator(bool aSeparator) {
aSeparator ? mFlags |= ROW_FLAG_SEPARATOR : mFlags &= ~ROW_FLAG_SEPARATOR;
}
bool IsSeparator() { return !!(mFlags & ROW_FLAG_SEPARATOR); }
// Weak reference to a content item.
Element* mContent;
// The parent index of the item, set to -1 for the top level items.
int32_t mParentIndex;
// Subtree size for this item.
int32_t mSubtreeSize;
private:
// State flags
int8_t mFlags;
};
// We don't reference count the reference to the document
// If the document goes away first, we'll be informed and we
// can drop our reference.
// If we go away first, we'll get rid of ourselves from the
// document's observer list.
nsTreeContentView::nsTreeContentView(void)
: mTree(nullptr), mSelection(nullptr), mDocument(nullptr) {}
nsTreeContentView::~nsTreeContentView(void) {
// Remove ourselves from mDocument's observers.
if (mDocument) mDocument->RemoveObserver(this);
}
nsresult NS_NewTreeContentView(nsITreeView** aResult) {
*aResult = new nsTreeContentView;
if (!*aResult) return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsTreeContentView, mTree, mSelection,
mBody)
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsTreeContentView)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsTreeContentView)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsTreeContentView)
NS_INTERFACE_MAP_ENTRY(nsITreeView)
NS_INTERFACE_MAP_ENTRY(nsIDocumentObserver)
NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsITreeView)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_END
JSObject* nsTreeContentView::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return TreeContentView_Binding::Wrap(aCx, this, aGivenProto);
}
nsISupports* nsTreeContentView::GetParentObject() { return mTree; }
NS_IMETHODIMP
nsTreeContentView::GetRowCount(int32_t* aRowCount) {
*aRowCount = mRows.Length();
return NS_OK;
}
NS_IMETHODIMP
nsTreeContentView::GetSelection(nsITreeSelection** aSelection) {
NS_IF_ADDREF(*aSelection = GetSelection());
return NS_OK;
}
bool nsTreeContentView::CanTrustTreeSelection(nsISupports* aValue) {
// Untrusted content is only allowed to specify known-good views
if (nsContentUtils::LegacyIsCallerChromeOrNativeCode()) return true;
nsCOMPtr<nsINativeTreeSelection> nativeTreeSel = do_QueryInterface(aValue);
return nativeTreeSel && NS_SUCCEEDED(nativeTreeSel->EnsureNative());
}
NS_IMETHODIMP
nsTreeContentView::SetSelection(nsITreeSelection* aSelection) {
ErrorResult rv;
SetSelection(aSelection, rv);
return rv.StealNSResult();
}
void nsTreeContentView::SetSelection(nsITreeSelection* aSelection,
ErrorResult& aError) {
if (aSelection && !CanTrustTreeSelection(aSelection)) {
aError.ThrowSecurityError("Not allowed to set tree selection");
return;
}
mSelection = aSelection;
}
void nsTreeContentView::GetRowProperties(int32_t aRow, nsAString& aProperties,
ErrorResult& aError) {
aProperties.Truncate();
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
Row* row = mRows[aRow].get();
nsIContent* realRow;
if (row->IsSeparator())
realRow = row->mContent;
else
realRow = nsTreeUtils::GetImmediateChild(row->mContent, nsGkAtoms::treerow);
if (realRow && realRow->IsElement()) {
realRow->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::properties,
aProperties);
}
}
NS_IMETHODIMP
nsTreeContentView::GetRowProperties(int32_t aIndex, nsAString& aProps) {
ErrorResult rv;
GetRowProperties(aIndex, aProps, rv);
return rv.StealNSResult();
}
void nsTreeContentView::GetCellProperties(int32_t aRow, nsTreeColumn& aColumn,
nsAString& aProperties,
ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
Row* row = mRows[aRow].get();
nsIContent* realRow =
nsTreeUtils::GetImmediateChild(row->mContent, nsGkAtoms::treerow);
if (realRow) {
Element* cell = GetCell(realRow, aColumn);
if (cell) {
cell->GetAttr(kNameSpaceID_None, nsGkAtoms::properties, aProperties);
}
}
}
NS_IMETHODIMP
nsTreeContentView::GetCellProperties(int32_t aRow, nsTreeColumn* aCol,
nsAString& aProps) {
NS_ENSURE_ARG(aCol);
ErrorResult rv;
GetCellProperties(aRow, *aCol, aProps, rv);
return rv.StealNSResult();
}
void nsTreeContentView::GetColumnProperties(nsTreeColumn& aColumn,
nsAString& aProperties) {
RefPtr<Element> element = aColumn.Element();
if (element) {
element->GetAttr(nsGkAtoms::properties, aProperties);
}
}
NS_IMETHODIMP
nsTreeContentView::GetColumnProperties(nsTreeColumn* aCol, nsAString& aProps) {
NS_ENSURE_ARG(aCol);
GetColumnProperties(*aCol, aProps);
return NS_OK;
}
bool nsTreeContentView::IsContainer(int32_t aRow, ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return false;
}
return mRows[aRow]->IsContainer();
}
NS_IMETHODIMP
nsTreeContentView::IsContainer(int32_t aIndex, bool* _retval) {
ErrorResult rv;
*_retval = IsContainer(aIndex, rv);
return rv.StealNSResult();
}
bool nsTreeContentView::IsContainerOpen(int32_t aRow, ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return false;
}
return mRows[aRow]->IsOpen();
}
NS_IMETHODIMP
nsTreeContentView::IsContainerOpen(int32_t aIndex, bool* _retval) {
ErrorResult rv;
*_retval = IsContainerOpen(aIndex, rv);
return rv.StealNSResult();
}
bool nsTreeContentView::IsContainerEmpty(int32_t aRow, ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return false;
}
return mRows[aRow]->IsEmpty();
}
NS_IMETHODIMP
nsTreeContentView::IsContainerEmpty(int32_t aIndex, bool* _retval) {
ErrorResult rv;
*_retval = IsContainerEmpty(aIndex, rv);
return rv.StealNSResult();
}
bool nsTreeContentView::IsSeparator(int32_t aRow, ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return false;
}
return mRows[aRow]->IsSeparator();
}
NS_IMETHODIMP
nsTreeContentView::IsSeparator(int32_t aIndex, bool* _retval) {
ErrorResult rv;
*_retval = IsSeparator(aIndex, rv);
return rv.StealNSResult();
}
NS_IMETHODIMP
nsTreeContentView::IsSorted(bool* _retval) {
*_retval = IsSorted();
return NS_OK;
}
bool nsTreeContentView::CanDrop(int32_t aRow, int32_t aOrientation,
ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
}
return false;
}
bool nsTreeContentView::CanDrop(int32_t aRow, int32_t aOrientation,
DataTransfer* aDataTransfer,
ErrorResult& aError) {
return CanDrop(aRow, aOrientation, aError);
}
NS_IMETHODIMP
nsTreeContentView::CanDrop(int32_t aIndex, int32_t aOrientation,
DataTransfer* aDataTransfer, bool* _retval) {
ErrorResult rv;
*_retval = CanDrop(aIndex, aOrientation, rv);
return rv.StealNSResult();
}
void nsTreeContentView::Drop(int32_t aRow, int32_t aOrientation,
ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
}
}
void nsTreeContentView::Drop(int32_t aRow, int32_t aOrientation,
DataTransfer* aDataTransfer, ErrorResult& aError) {
Drop(aRow, aOrientation, aError);
}
NS_IMETHODIMP
nsTreeContentView::Drop(int32_t aRow, int32_t aOrientation,
DataTransfer* aDataTransfer) {
ErrorResult rv;
Drop(aRow, aOrientation, rv);
return rv.StealNSResult();
}
int32_t nsTreeContentView::GetParentIndex(int32_t aRow, ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return 0;
}
return mRows[aRow]->mParentIndex;
}
NS_IMETHODIMP
nsTreeContentView::GetParentIndex(int32_t aRowIndex, int32_t* _retval) {
ErrorResult rv;
*_retval = GetParentIndex(aRowIndex, rv);
return rv.StealNSResult();
}
bool nsTreeContentView::HasNextSibling(int32_t aRow, int32_t aAfterIndex,
ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return false;
}
// We have a next sibling if the row is not the last in the subtree.
int32_t parentIndex = mRows[aRow]->mParentIndex;
if (parentIndex < 0) {
return uint32_t(aRow) < mRows.Length() - 1;
}
// Compute the last index in this subtree.
int32_t lastIndex = parentIndex + (mRows[parentIndex])->mSubtreeSize;
Row* row = mRows[lastIndex].get();
while (row->mParentIndex != parentIndex) {
lastIndex = row->mParentIndex;
row = mRows[lastIndex].get();
}
return aRow < lastIndex;
}
NS_IMETHODIMP
nsTreeContentView::HasNextSibling(int32_t aRowIndex, int32_t aAfterIndex,
bool* _retval) {
ErrorResult rv;
*_retval = HasNextSibling(aRowIndex, aAfterIndex, rv);
return rv.StealNSResult();
}
int32_t nsTreeContentView::GetLevel(int32_t aRow, ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return 0;
}
int32_t level = 0;
Row* row = mRows[aRow].get();
while (row->mParentIndex >= 0) {
level++;
row = mRows[row->mParentIndex].get();
}
return level;
}
NS_IMETHODIMP
nsTreeContentView::GetLevel(int32_t aIndex, int32_t* _retval) {
ErrorResult rv;
*_retval = GetLevel(aIndex, rv);
return rv.StealNSResult();
}
void nsTreeContentView::GetImageSrc(int32_t aRow, nsTreeColumn& aColumn,
nsAString& aSrc, ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
Row* row = mRows[aRow].get();
nsIContent* realRow =
nsTreeUtils::GetImmediateChild(row->mContent, nsGkAtoms::treerow);
if (realRow) {
Element* cell = GetCell(realRow, aColumn);
if (cell) cell->GetAttr(kNameSpaceID_None, nsGkAtoms::src, aSrc);
}
}
NS_IMETHODIMP
nsTreeContentView::GetImageSrc(int32_t aRow, nsTreeColumn* aCol,
nsAString& _retval) {
NS_ENSURE_ARG(aCol);
ErrorResult rv;
GetImageSrc(aRow, *aCol, _retval, rv);
return rv.StealNSResult();
}
void nsTreeContentView::GetCellValue(int32_t aRow, nsTreeColumn& aColumn,
nsAString& aValue, ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
Row* row = mRows[aRow].get();
nsIContent* realRow =
nsTreeUtils::GetImmediateChild(row->mContent, nsGkAtoms::treerow);
if (realRow) {
Element* cell = GetCell(realRow, aColumn);
if (cell) cell->GetAttr(kNameSpaceID_None, nsGkAtoms::value, aValue);
}
}
NS_IMETHODIMP
nsTreeContentView::GetCellValue(int32_t aRow, nsTreeColumn* aCol,
nsAString& _retval) {
NS_ENSURE_ARG(aCol);
ErrorResult rv;
GetCellValue(aRow, *aCol, _retval, rv);
return rv.StealNSResult();
}
void nsTreeContentView::GetCellText(int32_t aRow, nsTreeColumn& aColumn,
nsAString& aText, ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
Row* row = mRows[aRow].get();
// Check for a "label" attribute - this is valid on an <treeitem>
// with a single implied column.
if (row->mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::label, aText) &&
!aText.IsEmpty()) {
return;
}
if (row->mContent->IsXULElement(nsGkAtoms::treeitem)) {
nsIContent* realRow =
nsTreeUtils::GetImmediateChild(row->mContent, nsGkAtoms::treerow);
if (realRow) {
Element* cell = GetCell(realRow, aColumn);
if (cell) cell->GetAttr(kNameSpaceID_None, nsGkAtoms::label, aText);
}
}
}
NS_IMETHODIMP
nsTreeContentView::GetCellText(int32_t aRow, nsTreeColumn* aCol,
nsAString& _retval) {
NS_ENSURE_ARG(aCol);
ErrorResult rv;
GetCellText(aRow, *aCol, _retval, rv);
return rv.StealNSResult();
}
void nsTreeContentView::SetTree(XULTreeElement* aTree, ErrorResult& aError) {
aError = SetTree(aTree);
}
NS_IMETHODIMP
nsTreeContentView::SetTree(XULTreeElement* aTree) {
ClearRows();
mTree = aTree;
if (aTree) {
// Add ourselves to document's observers.
Document* document = mTree->GetComposedDoc();
if (document) {
document->AddObserver(this);
mDocument = document;
}
RefPtr<dom::Element> bodyElement = mTree->GetTreeBody();
if (bodyElement) {
mBody = std::move(bodyElement);
int32_t index = 0;
Serialize(mBody, -1, &index, mRows);
}
}
return NS_OK;
}
void nsTreeContentView::ToggleOpenState(int32_t aRow, ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
// We don't serialize content right here, since content might be generated
// lazily.
Row* row = mRows[aRow].get();
if (row->IsOpen())
row->mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::open, u"false"_ns,
true);
else
row->mContent->SetAttr(kNameSpaceID_None, nsGkAtoms::open, u"true"_ns,
true);
}
NS_IMETHODIMP
nsTreeContentView::ToggleOpenState(int32_t aIndex) {
ErrorResult rv;
ToggleOpenState(aIndex, rv);
return rv.StealNSResult();
}
void nsTreeContentView::CycleHeader(nsTreeColumn& aColumn,
ErrorResult& aError) {
if (!mTree) return;
RefPtr<Element> column = aColumn.Element();
nsAutoString sort;
column->GetAttr(kNameSpaceID_None, nsGkAtoms::sort, sort);
if (!sort.IsEmpty()) {
nsAutoString sortdirection;
static Element::AttrValuesArray strings[] = {
nsGkAtoms::ascending, nsGkAtoms::descending, nullptr};
switch (column->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::sortDirection,
strings, eCaseMatters)) {
case 0:
sortdirection.AssignLiteral("descending");
break;
case 1:
sortdirection.AssignLiteral("natural");
break;
default:
sortdirection.AssignLiteral("ascending");
break;
}
nsAutoString hints;
column->GetAttr(kNameSpaceID_None, nsGkAtoms::sorthints, hints);
sortdirection.Append(' ');
sortdirection += hints;
XULWidgetSort(mTree, sort, sortdirection);
}
}
NS_IMETHODIMP
nsTreeContentView::CycleHeader(nsTreeColumn* aCol) {
NS_ENSURE_ARG(aCol);
ErrorResult rv;
CycleHeader(*aCol, rv);
return rv.StealNSResult();
}
NS_IMETHODIMP
nsTreeContentView::SelectionChangedXPCOM() { return NS_OK; }
NS_IMETHODIMP
nsTreeContentView::CycleCell(int32_t aRow, nsTreeColumn* aCol) { return NS_OK; }
bool nsTreeContentView::IsEditable(int32_t aRow, nsTreeColumn& aColumn,
ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return false;
}
Row* row = mRows[aRow].get();
nsIContent* realRow =
nsTreeUtils::GetImmediateChild(row->mContent, nsGkAtoms::treerow);
if (realRow) {
Element* cell = GetCell(realRow, aColumn);
if (cell && cell->AttrValueIs(kNameSpaceID_None, nsGkAtoms::editable,
nsGkAtoms::_false, eCaseMatters)) {
return false;
}
}
return true;
}
NS_IMETHODIMP
nsTreeContentView::IsEditable(int32_t aRow, nsTreeColumn* aCol, bool* _retval) {
NS_ENSURE_ARG(aCol);
ErrorResult rv;
*_retval = IsEditable(aRow, *aCol, rv);
return rv.StealNSResult();
}
void nsTreeContentView::SetCellValue(int32_t aRow, nsTreeColumn& aColumn,
const nsAString& aValue,
ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
Row* row = mRows[aRow].get();
nsIContent* realRow =
nsTreeUtils::GetImmediateChild(row->mContent, nsGkAtoms::treerow);
if (realRow) {
Element* cell = GetCell(realRow, aColumn);
if (cell) cell->SetAttr(kNameSpaceID_None, nsGkAtoms::value, aValue, true);
}
}
NS_IMETHODIMP
nsTreeContentView::SetCellValue(int32_t aRow, nsTreeColumn* aCol,
const nsAString& aValue) {
NS_ENSURE_ARG(aCol);
ErrorResult rv;
SetCellValue(aRow, *aCol, aValue, rv);
return rv.StealNSResult();
}
void nsTreeContentView::SetCellText(int32_t aRow, nsTreeColumn& aColumn,
const nsAString& aValue,
ErrorResult& aError) {
if (!IsValidRowIndex(aRow)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return;
}
Row* row = mRows[aRow].get();
nsIContent* realRow =
nsTreeUtils::GetImmediateChild(row->mContent, nsGkAtoms::treerow);
if (realRow) {
Element* cell = GetCell(realRow, aColumn);
if (cell) cell->SetAttr(kNameSpaceID_None, nsGkAtoms::label, aValue, true);
}
}
NS_IMETHODIMP
nsTreeContentView::SetCellText(int32_t aRow, nsTreeColumn* aCol,
const nsAString& aValue) {
NS_ENSURE_ARG(aCol);
ErrorResult rv;
SetCellText(aRow, *aCol, aValue, rv);
return rv.StealNSResult();
}
Element* nsTreeContentView::GetItemAtIndex(int32_t aIndex,
ErrorResult& aError) {
if (!IsValidRowIndex(aIndex)) {
aError.Throw(NS_ERROR_INVALID_ARG);
return nullptr;
}
return mRows[aIndex]->mContent;
}
int32_t nsTreeContentView::GetIndexOfItem(Element* aItem) {
return FindContent(aItem);
}
void nsTreeContentView::AttributeChanged(dom::Element* aElement,
int32_t aNameSpaceID,
nsAtom* aAttribute, int32_t aModType,
const nsAttrValue* aOldValue) {
// Lots of codepaths under here that do all sorts of stuff, so be safe.
nsCOMPtr<nsIMutationObserver> kungFuDeathGrip(this);
// Make sure this notification concerns us.
// First check the tag to see if it's one that we care about.
if (aElement == mTree || aElement == mBody) {
mTree->ClearStyleAndImageCaches();
mTree->Invalidate();
}
// We don't consider non-XUL nodes.
nsIContent* parent = nullptr;
if (!aElement->IsXULElement() ||
((parent = aElement->GetParent()) && !parent->IsXULElement())) {
return;
}
if (!aElement->IsAnyOfXULElements(nsGkAtoms::treecol, nsGkAtoms::treeitem,
nsGkAtoms::treeseparator,
nsGkAtoms::treerow, nsGkAtoms::treecell)) {
return;
}
// If we have a legal tag, go up to the tree/select and make sure
// that it's ours.
for (nsIContent* element = aElement; element != mBody;
element = element->GetParent()) {
if (!element) return; // this is not for us
if (element->IsXULElement(nsGkAtoms::tree)) return; // this is not for us
}
// Handle changes of the hidden attribute.
if (aAttribute == nsGkAtoms::hidden &&
aElement->IsAnyOfXULElements(nsGkAtoms::treeitem,
nsGkAtoms::treeseparator)) {
bool hidden = aElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::hidden,
nsGkAtoms::_true, eCaseMatters);
int32_t index = FindContent(aElement);
if (hidden && index >= 0) {
// Hide this row along with its children.
int32_t count = RemoveRow(index);
if (mTree) mTree->RowCountChanged(index, -count);
} else if (!hidden && index < 0) {
// Show this row along with its children.
nsCOMPtr<nsIContent> parent = aElement->GetParent();
if (parent) {
InsertRowFor(parent, aElement);
}
}
return;
}
if (aElement->IsXULElement(nsGkAtoms::treecol)) {
if (aAttribute == nsGkAtoms::properties) {
if (mTree) {
RefPtr<nsTreeColumns> cols = mTree->GetColumns();
if (cols) {
RefPtr<nsTreeColumn> col = cols->GetColumnFor(aElement);
mTree->InvalidateColumn(col);
}
}
}
} else if (aElement->IsXULElement(nsGkAtoms::treeitem)) {
int32_t index = FindContent(aElement);
if (index >= 0) {
Row* row = mRows[index].get();
if (aAttribute == nsGkAtoms::container) {
bool isContainer =
aElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::container,
nsGkAtoms::_true, eCaseMatters);
row->SetContainer(isContainer);
if (mTree) mTree->InvalidateRow(index);
} else if (aAttribute == nsGkAtoms::open) {
bool isOpen = aElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::open,
nsGkAtoms::_true, eCaseMatters);
bool wasOpen = row->IsOpen();
if (!isOpen && wasOpen)
CloseContainer(index);
else if (isOpen && !wasOpen)
OpenContainer(index);
} else if (aAttribute == nsGkAtoms::empty) {
bool isEmpty =
aElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::empty,
nsGkAtoms::_true, eCaseMatters);
row->SetEmpty(isEmpty);
if (mTree) mTree->InvalidateRow(index);
}
}
} else if (aElement->IsXULElement(nsGkAtoms::treeseparator)) {
int32_t index = FindContent(aElement);
if (index >= 0) {
if (aAttribute == nsGkAtoms::properties && mTree) {
mTree->InvalidateRow(index);
}
}
} else if (aElement->IsXULElement(nsGkAtoms::treerow)) {
if (aAttribute == nsGkAtoms::properties) {
nsCOMPtr<nsIContent> parent = aElement->GetParent();
if (parent) {
int32_t index = FindContent(parent);
if (index >= 0 && mTree) {
mTree->InvalidateRow(index);
}
}
}
} else if (aElement->IsXULElement(nsGkAtoms::treecell)) {
if (aAttribute == nsGkAtoms::properties || aAttribute == nsGkAtoms::mode ||
aAttribute == nsGkAtoms::src || aAttribute == nsGkAtoms::value ||
aAttribute == nsGkAtoms::label) {
nsIContent* parent = aElement->GetParent();
if (parent) {
nsCOMPtr<nsIContent> grandParent = parent->GetParent();
if (grandParent && grandParent->IsXULElement()) {
int32_t index = FindContent(grandParent);
if (index >= 0 && mTree) {
// XXX Should we make an effort to invalidate only cell ?
mTree->InvalidateRow(index);
}
}
}
}
}
}
void nsTreeContentView::ContentAppended(nsIContent* aFirstNewContent) {
for (nsIContent* cur = aFirstNewContent; cur; cur = cur->GetNextSibling()) {
// Our contentinserted doesn't use the index
ContentInserted(cur);
}
}
void nsTreeContentView::ContentInserted(nsIContent* aChild) {
NS_ASSERTION(aChild, "null ptr");
nsIContent* container = aChild->GetParent();
// Make sure this notification concerns us.
// First check the tag to see if it's one that we care about.
// Don't allow non-XUL nodes.
if (!aChild->IsXULElement() || !container->IsXULElement()) return;
if (!aChild->IsAnyOfXULElements(nsGkAtoms::treeitem, nsGkAtoms::treeseparator,
nsGkAtoms::treechildren, nsGkAtoms::treerow,
nsGkAtoms::treecell)) {
return;
}
// If we have a legal tag, go up to the tree/select and make sure
// that it's ours.
for (nsIContent* element = container; element != mBody;
element = element->GetParent()) {
if (!element) return; // this is not for us
if (element->IsXULElement(nsGkAtoms::tree)) return; // this is not for us
}
// Lots of codepaths under here that do all sorts of stuff, so be safe.
nsCOMPtr<nsIMutationObserver> kungFuDeathGrip(this);
if (aChild->IsXULElement(nsGkAtoms::treechildren)) {
int32_t index = FindContent(container);
if (index >= 0) {
Row* row = mRows[index].get();
row->SetEmpty(false);
if (mTree) mTree->InvalidateRow(index);
if (row->IsContainer() && row->IsOpen()) {
int32_t count = EnsureSubtree(index);
if (mTree) mTree->RowCountChanged(index + 1, count);
}
}
} else if (aChild->IsAnyOfXULElements(nsGkAtoms::treeitem,
nsGkAtoms::treeseparator)) {
InsertRowFor(container, aChild);
} else if (aChild->IsXULElement(nsGkAtoms::treerow)) {
int32_t index = FindContent(container);
if (index >= 0 && mTree) mTree->InvalidateRow(index);
} else if (aChild->IsXULElement(nsGkAtoms::treecell)) {
nsCOMPtr<nsIContent> parent = container->GetParent();
if (parent) {
int32_t index = FindContent(parent);
if (index >= 0 && mTree) mTree->InvalidateRow(index);
}
}
}
void nsTreeContentView::ContentRemoved(nsIContent* aChild,
nsIContent* aPreviousSibling) {
NS_ASSERTION(aChild, "null ptr");
nsIContent* container = aChild->GetParent();
// Make sure this notification concerns us.
// First check the tag to see if it's one that we care about.
// We don't consider non-XUL nodes.
if (!aChild->IsXULElement() || !container->IsXULElement()) return;
if (!aChild->IsAnyOfXULElements(nsGkAtoms::treeitem, nsGkAtoms::treeseparator,
nsGkAtoms::treechildren, nsGkAtoms::treerow,
nsGkAtoms::treecell)) {
return;
}
// If we have a legal tag, go up to the tree/select and make sure
// that it's ours.
for (nsIContent* element = container; element != mBody;
element = element->GetParent()) {
if (!element) return; // this is not for us
if (element->IsXULElement(nsGkAtoms::tree)) return; // this is not for us
}
// Lots of codepaths under here that do all sorts of stuff, so be safe.
nsCOMPtr<nsIMutationObserver> kungFuDeathGrip(this);
if (aChild->IsXULElement(nsGkAtoms::treechildren)) {
int32_t index = FindContent(container);
if (index >= 0) {
Row* row = mRows[index].get();
row->SetEmpty(true);
int32_t count = RemoveSubtree(index);
// Invalidate also the row to update twisty.
if (mTree) {
mTree->InvalidateRow(index);
mTree->RowCountChanged(index + 1, -count);
}
}
} else if (aChild->IsAnyOfXULElements(nsGkAtoms::treeitem,
nsGkAtoms::treeseparator)) {
int32_t index = FindContent(aChild);
if (index >= 0) {
int32_t count = RemoveRow(index);
if (mTree) mTree->RowCountChanged(index, -count);
}
} else if (aChild->IsXULElement(nsGkAtoms::treerow)) {
int32_t index = FindContent(container);
if (index >= 0 && mTree) mTree->InvalidateRow(index);
} else if (aChild->IsXULElement(nsGkAtoms::treecell)) {
nsCOMPtr<nsIContent> parent = container->GetParent();
if (parent) {
int32_t index = FindContent(parent);
if (index >= 0 && mTree) mTree->InvalidateRow(index);
}
}
}
void nsTreeContentView::NodeWillBeDestroyed(const nsINode* aNode) {
// XXXbz do we need this strong ref? Do we drop refs to self in ClearRows?
nsCOMPtr<nsIMutationObserver> kungFuDeathGrip(this);
ClearRows();
}
// Recursively serialize content, starting with aContent.
void nsTreeContentView::Serialize(nsIContent* aContent, int32_t aParentIndex,
int32_t* aIndex,
nsTArray<UniquePtr<Row>>& aRows) {
// Don't allow non-XUL nodes.
if (!aContent->IsXULElement()) return;
dom::FlattenedChildIterator iter(aContent);
for (nsIContent* content = iter.GetNextChild(); content;
content = iter.GetNextChild()) {
int32_t count = aRows.Length();
if (content->IsXULElement(nsGkAtoms::treeitem)) {
SerializeItem(content->AsElement(), aParentIndex, aIndex, aRows);
} else if (content->IsXULElement(nsGkAtoms::treeseparator)) {
SerializeSeparator(content->AsElement(), aParentIndex, aIndex, aRows);
}
*aIndex += aRows.Length() - count;
}
}
void nsTreeContentView::SerializeItem(Element* aContent, int32_t aParentIndex,
int32_t* aIndex,
nsTArray<UniquePtr<Row>>& aRows) {
if (aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::hidden,
nsGkAtoms::_true, eCaseMatters))
return;
aRows.AppendElement(MakeUnique<Row>(aContent, aParentIndex));
Row* row = aRows.LastElement().get();
if (aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::container,
nsGkAtoms::_true, eCaseMatters)) {
row->SetContainer(true);
if (aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::open,
nsGkAtoms::_true, eCaseMatters)) {
row->SetOpen(true);
nsIContent* child =
nsTreeUtils::GetImmediateChild(aContent, nsGkAtoms::treechildren);
if (child && child->IsXULElement()) {
// Now, recursively serialize our child.
int32_t count = aRows.Length();
int32_t index = 0;
Serialize(child, aParentIndex + *aIndex + 1, &index, aRows);
row->mSubtreeSize += aRows.Length() - count;
} else
row->SetEmpty(true);
} else if (aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::empty,
nsGkAtoms::_true, eCaseMatters)) {
row->SetEmpty(true);
}
}
}
void nsTreeContentView::SerializeSeparator(Element* aContent,
int32_t aParentIndex,
int32_t* aIndex,
nsTArray<UniquePtr<Row>>& aRows) {
if (aContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::hidden,
nsGkAtoms::_true, eCaseMatters))
return;
auto row = MakeUnique<Row>(aContent, aParentIndex);
row->SetSeparator(true);
aRows.AppendElement(std::move(row));
}
void nsTreeContentView::GetIndexInSubtree(nsIContent* aContainer,
nsIContent* aContent,
int32_t* aIndex) {
if (!aContainer->IsXULElement()) return;
for (nsIContent* content = aContainer->GetFirstChild(); content;
content = content->GetNextSibling()) {
if (content == aContent) break;
if (content->IsXULElement(nsGkAtoms::treeitem)) {
if (!content->AsElement()->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::hidden,
nsGkAtoms::_true, eCaseMatters)) {
(*aIndex)++;
if (content->AsElement()->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::container,
nsGkAtoms::_true, eCaseMatters) &&
content->AsElement()->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::open, nsGkAtoms::_true,
eCaseMatters)) {
nsIContent* child =
nsTreeUtils::GetImmediateChild(content, nsGkAtoms::treechildren);
if (child && child->IsXULElement())
GetIndexInSubtree(child, aContent, aIndex);
}
}
} else if (content->IsXULElement(nsGkAtoms::treeseparator)) {
if (!content->AsElement()->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::hidden,
nsGkAtoms::_true, eCaseMatters))
(*aIndex)++;
}
}
}
int32_t nsTreeContentView::EnsureSubtree(int32_t aIndex) {
Row* row = mRows[aIndex].get();
nsIContent* child;
child =
nsTreeUtils::GetImmediateChild(row->mContent, nsGkAtoms::treechildren);
if (!child || !child->IsXULElement()) {
return 0;
}
AutoTArray<UniquePtr<Row>, 8> rows;
int32_t index = 0;
Serialize(child, aIndex, &index, rows);
// Insert |rows| into |mRows| at position |aIndex|, by first creating empty
// UniquePtr entries and then Move'ing |rows|'s entries into them. (Note
// that we can't simply use InsertElementsAt with an array argument, since
// the destination can't steal ownership from its const source argument.)
UniquePtr<Row>* newRows = mRows.InsertElementsAt(aIndex + 1, rows.Length());
for (nsTArray<Row>::index_type i = 0; i < rows.Length(); i++) {
newRows[i] = std::move(rows[i]);
}
int32_t count = rows.Length();
row->mSubtreeSize += count;
UpdateSubtreeSizes(row->mParentIndex, count);
// Update parent indexes, but skip newly added rows.
// They already have correct values.
UpdateParentIndexes(aIndex, count + 1, count);
return count;
}
int32_t nsTreeContentView::RemoveSubtree(int32_t aIndex) {
Row* row = mRows[aIndex].get();
int32_t count = row->mSubtreeSize;
mRows.RemoveElementsAt(aIndex + 1, count);
row->mSubtreeSize -= count;
UpdateSubtreeSizes(row->mParentIndex, -count);
UpdateParentIndexes(aIndex, 0, -count);
return count;
}
void nsTreeContentView::InsertRowFor(nsIContent* aParent, nsIContent* aChild) {
int32_t grandParentIndex = -1;
bool insertRow = false;
nsCOMPtr<nsIContent> grandParent = aParent->GetParent();
if (grandParent->IsXULElement(nsGkAtoms::tree)) {
// Allow insertion to the outermost container.
insertRow = true;
} else {
// Test insertion to an inner container.
// First try to find this parent in our array of rows, if we find one
// we can be sure that all other parents are open too.
grandParentIndex = FindContent(grandParent);
if (grandParentIndex >= 0) {
// Got it, now test if it is open.
if (mRows[grandParentIndex]->IsOpen()) insertRow = true;
}
}
if (insertRow) {
int32_t index = 0;
GetIndexInSubtree(aParent, aChild, &index);
int32_t count = InsertRow(grandParentIndex, index, aChild);
if (mTree) mTree->RowCountChanged(grandParentIndex + index + 1, count);
}
}
int32_t nsTreeContentView::InsertRow(int32_t aParentIndex, int32_t aIndex,
nsIContent* aContent) {
AutoTArray<UniquePtr<Row>, 8> rows;
if (aContent->IsXULElement(nsGkAtoms::treeitem)) {
SerializeItem(aContent->AsElement(), aParentIndex, &aIndex, rows);
} else if (aContent->IsXULElement(nsGkAtoms::treeseparator)) {
SerializeSeparator(aContent->AsElement(), aParentIndex, &aIndex, rows);
}
// We can't use InsertElementsAt since the destination can't steal
// ownership from its const source argument.
int32_t count = rows.Length();
for (nsTArray<Row>::index_type i = 0; i < size_t(count); i++) {
mRows.InsertElementAt(aParentIndex + aIndex + i + 1, std::move(rows[i]));
}
UpdateSubtreeSizes(aParentIndex, count);
// Update parent indexes, but skip added rows.
// They already have correct values.
UpdateParentIndexes(aParentIndex + aIndex, count + 1, count);
return count;
}
int32_t nsTreeContentView::RemoveRow(int32_t aIndex) {
Row* row = mRows[aIndex].get();
int32_t count = row->mSubtreeSize + 1;
int32_t parentIndex = row->mParentIndex;
mRows.RemoveElementsAt(aIndex, count);
UpdateSubtreeSizes(parentIndex, -count);
UpdateParentIndexes(aIndex, 0, -count);
return count;
}
void nsTreeContentView::ClearRows() {
mRows.Clear();
mBody = nullptr;
// Remove ourselves from mDocument's observers.
if (mDocument) {
mDocument->RemoveObserver(this);
mDocument = nullptr;
}
}
void nsTreeContentView::OpenContainer(int32_t aIndex) {
Row* row = mRows[aIndex].get();
row->SetOpen(true);
int32_t count = EnsureSubtree(aIndex);
if (mTree) {
mTree->InvalidateRow(aIndex);
mTree->RowCountChanged(aIndex + 1, count);
}
}
void nsTreeContentView::CloseContainer(int32_t aIndex) {
Row* row = mRows[aIndex].get();
row->SetOpen(false);
int32_t count = RemoveSubtree(aIndex);
if (mTree) {
mTree->InvalidateRow(aIndex);
mTree->RowCountChanged(aIndex + 1, -count);
}
}
int32_t nsTreeContentView::FindContent(nsIContent* aContent) {
for (uint32_t i = 0; i < mRows.Length(); i++) {
if (mRows[i]->mContent == aContent) {
return i;
}
}
return -1;
}
void nsTreeContentView::UpdateSubtreeSizes(int32_t aParentIndex,
int32_t count) {
while (aParentIndex >= 0) {
Row* row = mRows[aParentIndex].get();
row->mSubtreeSize += count;
aParentIndex = row->mParentIndex;
}
}
void nsTreeContentView::UpdateParentIndexes(int32_t aIndex, int32_t aSkip,
int32_t aCount) {
int32_t count = mRows.Length();
for (int32_t i = aIndex + aSkip; i < count; i++) {
Row* row = mRows[i].get();
if (row->mParentIndex > aIndex) {
row->mParentIndex += aCount;
}
}
}
Element* nsTreeContentView::GetCell(nsIContent* aContainer,
nsTreeColumn& aCol) {
int32_t colIndex(aCol.GetIndex());
// Traverse through cells, try to find the cell by index in a row.
Element* result = nullptr;
int32_t j = 0;
dom::FlattenedChildIterator iter(aContainer);
for (nsIContent* cell = iter.GetNextChild(); cell;
cell = iter.GetNextChild()) {
if (cell->IsXULElement(nsGkAtoms::treecell)) {
if (j == colIndex) {
result = cell->AsElement();
break;
}
j++;
}
}
return result;
}
bool nsTreeContentView::IsValidRowIndex(int32_t aRowIndex) {
return aRowIndex >= 0 && aRowIndex < int32_t(mRows.Length());
}
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