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tenfourfox/accessible/xul/XULTreeAccessible.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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 "XULTreeAccessible.h"
#include "Accessible-inl.h"
#include "DocAccessible-inl.h"
#include "nsAccCache.h"
#include "nsAccUtils.h"
#include "nsCoreUtils.h"
#include "nsEventShell.h"
#include "DocAccessible.h"
#include "Relation.h"
#include "Role.h"
#include "States.h"
#include "XULTreeGridAccessible.h"
#include "nsQueryObject.h"
#include "nsComponentManagerUtils.h"
#include "nsIAccessibleRelation.h"
#include "nsIAutoCompleteInput.h"
#include "nsIAutoCompletePopup.h"
#include "nsIBoxObject.h"
#include "nsIDOMXULElement.h"
#include "nsIDOMXULMenuListElement.h"
#include "nsIDOMXULMultSelectCntrlEl.h"
#include "nsIDOMXULTreeElement.h"
#include "nsITreeSelection.h"
#include "nsIMutableArray.h"
#include "nsTreeBodyFrame.h"
#include "nsTreeColumns.h"
#include "nsTreeUtils.h"
using namespace mozilla::a11y;
////////////////////////////////////////////////////////////////////////////////
// XULTreeAccessible
////////////////////////////////////////////////////////////////////////////////
XULTreeAccessible::
XULTreeAccessible(nsIContent* aContent, DocAccessible* aDoc,
nsTreeBodyFrame* aTreeFrame) :
AccessibleWrap(aContent, aDoc),
mAccessibleCache(kDefaultTreeCacheLength)
{
mType = eXULTreeType;
mGenericTypes |= eSelect;
nsCOMPtr<nsITreeView> view = aTreeFrame->GetExistingView();
mTreeView = view;
mTree = nsCoreUtils::GetTreeBoxObject(aContent);
NS_ASSERTION(mTree, "Can't get mTree!\n");
nsIContent* parentContent = mContent->GetParent();
if (parentContent) {
nsCOMPtr<nsIAutoCompletePopup> autoCompletePopupElm =
do_QueryInterface(parentContent);
if (autoCompletePopupElm)
mGenericTypes |= eAutoCompletePopup;
}
}
XULTreeAccessible::~XULTreeAccessible()
{
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeAccessible: nsISupports and cycle collection implementation
NS_IMPL_CYCLE_COLLECTION_INHERITED(XULTreeAccessible, Accessible,
mTree, mAccessibleCache)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(XULTreeAccessible)
NS_INTERFACE_MAP_END_INHERITING(Accessible)
NS_IMPL_ADDREF_INHERITED(XULTreeAccessible, Accessible)
NS_IMPL_RELEASE_INHERITED(XULTreeAccessible, Accessible)
////////////////////////////////////////////////////////////////////////////////
// XULTreeAccessible: Accessible implementation
uint64_t
XULTreeAccessible::NativeState()
{
// Get focus status from base class.
uint64_t state = Accessible::NativeState();
// readonly state
state |= states::READONLY;
// multiselectable state.
if (!mTreeView)
return state;
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
NS_ENSURE_TRUE(selection, state);
bool isSingle = false;
nsresult rv = selection->GetSingle(&isSingle);
NS_ENSURE_SUCCESS(rv, state);
if (!isSingle)
state |= states::MULTISELECTABLE;
return state;
}
void
XULTreeAccessible::Value(nsString& aValue)
{
aValue.Truncate();
if (!mTreeView)
return;
// Return the value is the first selected child.
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (!selection)
return;
int32_t currentIndex;
nsCOMPtr<nsIDOMElement> selectItem;
selection->GetCurrentIndex(&currentIndex);
if (currentIndex >= 0) {
nsCOMPtr<nsITreeColumn> keyCol;
nsCOMPtr<nsITreeColumns> cols;
mTree->GetColumns(getter_AddRefs(cols));
if (cols)
cols->GetKeyColumn(getter_AddRefs(keyCol));
mTreeView->GetCellText(currentIndex, keyCol, aValue);
}
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeAccessible: Accessible implementation
void
XULTreeAccessible::Shutdown()
{
if (mDoc && !mDoc->IsDefunct()) {
UnbindCacheEntriesFromDocument(mAccessibleCache);
}
mTree = nullptr;
mTreeView = nullptr;
AccessibleWrap::Shutdown();
}
role
XULTreeAccessible::NativeRole()
{
// No primary column means we're in a list. In fact, history and mail turn off
// the primary flag when switching to a flat view.
nsIContent* child = nsTreeUtils::GetDescendantChild(mContent, nsGkAtoms::treechildren);
NS_ASSERTION(child, "tree without treechildren!");
nsTreeBodyFrame* treeFrame = do_QueryFrame(child->GetPrimaryFrame());
NS_ASSERTION(treeFrame, "xul tree accessible for tree without a frame!");
if (!treeFrame)
return roles::LIST;
RefPtr<nsTreeColumns> cols = treeFrame->Columns();
nsCOMPtr<nsITreeColumn> primaryCol;
cols->GetPrimaryColumn(getter_AddRefs(primaryCol));
return primaryCol ? roles::OUTLINE : roles::LIST;
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeAccessible: Accessible implementation (DON'T put methods here)
Accessible*
XULTreeAccessible::ChildAtPoint(int32_t aX, int32_t aY,
EWhichChildAtPoint aWhichChild)
{
nsIFrame *frame = GetFrame();
if (!frame)
return nullptr;
nsPresContext *presContext = frame->PresContext();
nsIPresShell* presShell = presContext->PresShell();
nsIFrame *rootFrame = presShell->GetRootFrame();
NS_ENSURE_TRUE(rootFrame, nullptr);
nsIntRect rootRect = rootFrame->GetScreenRect();
int32_t clientX = presContext->DevPixelsToIntCSSPixels(aX) - rootRect.x;
int32_t clientY = presContext->DevPixelsToIntCSSPixels(aY) - rootRect.y;
int32_t row = -1;
nsCOMPtr<nsITreeColumn> column;
nsAutoString childEltUnused;
mTree->GetCellAt(clientX, clientY, &row, getter_AddRefs(column),
childEltUnused);
// If we failed to find tree cell for the given point then it might be
// tree columns.
if (row == -1 || !column)
return AccessibleWrap::ChildAtPoint(aX, aY, aWhichChild);
Accessible* child = GetTreeItemAccessible(row);
if (aWhichChild == eDeepestChild && child) {
// Look for accessible cell for the found item accessible.
RefPtr<XULTreeItemAccessibleBase> treeitem = do_QueryObject(child);
Accessible* cell = treeitem->GetCellAccessible(column);
if (cell)
child = cell;
}
return child;
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeAccessible: SelectAccessible
Accessible*
XULTreeAccessible::CurrentItem()
{
if (!mTreeView)
return nullptr;
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (selection) {
int32_t currentIndex = -1;
selection->GetCurrentIndex(&currentIndex);
if (currentIndex >= 0)
return GetTreeItemAccessible(currentIndex);
}
return nullptr;
}
void
XULTreeAccessible::SetCurrentItem(Accessible* aItem)
{
NS_ERROR("XULTreeAccessible::SetCurrentItem not implemented");
}
void
XULTreeAccessible::SelectedItems(nsTArray<Accessible*>* aItems)
{
if (!mTreeView)
return;
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (!selection)
return;
int32_t rangeCount = 0;
selection->GetRangeCount(&rangeCount);
for (int32_t rangeIdx = 0; rangeIdx < rangeCount; rangeIdx++) {
int32_t firstIdx = 0, lastIdx = -1;
selection->GetRangeAt(rangeIdx, &firstIdx, &lastIdx);
for (int32_t rowIdx = firstIdx; rowIdx <= lastIdx; rowIdx++) {
Accessible* item = GetTreeItemAccessible(rowIdx);
if (item)
aItems->AppendElement(item);
}
}
}
uint32_t
XULTreeAccessible::SelectedItemCount()
{
if (!mTreeView)
return 0;
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (selection) {
int32_t count = 0;
selection->GetCount(&count);
return count;
}
return 0;
}
bool
XULTreeAccessible::AddItemToSelection(uint32_t aIndex)
{
if (!mTreeView)
return false;
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (selection) {
bool isSelected = false;
selection->IsSelected(aIndex, &isSelected);
if (!isSelected)
selection->ToggleSelect(aIndex);
return true;
}
return false;
}
bool
XULTreeAccessible::RemoveItemFromSelection(uint32_t aIndex)
{
if (!mTreeView)
return false;
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (selection) {
bool isSelected = false;
selection->IsSelected(aIndex, &isSelected);
if (isSelected)
selection->ToggleSelect(aIndex);
return true;
}
return false;
}
bool
XULTreeAccessible::IsItemSelected(uint32_t aIndex)
{
if (!mTreeView)
return false;
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (selection) {
bool isSelected = false;
selection->IsSelected(aIndex, &isSelected);
return isSelected;
}
return false;
}
bool
XULTreeAccessible::UnselectAll()
{
if (!mTreeView)
return false;
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (!selection)
return false;
selection->ClearSelection();
return true;
}
Accessible*
XULTreeAccessible::GetSelectedItem(uint32_t aIndex)
{
if (!mTreeView)
return nullptr;
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (!selection)
return nullptr;
uint32_t selCount = 0;
int32_t rangeCount = 0;
selection->GetRangeCount(&rangeCount);
for (int32_t rangeIdx = 0; rangeIdx < rangeCount; rangeIdx++) {
int32_t firstIdx = 0, lastIdx = -1;
selection->GetRangeAt(rangeIdx, &firstIdx, &lastIdx);
for (int32_t rowIdx = firstIdx; rowIdx <= lastIdx; rowIdx++) {
if (selCount == aIndex)
return GetTreeItemAccessible(rowIdx);
selCount++;
}
}
return nullptr;
}
bool
XULTreeAccessible::SelectAll()
{
// see if we are multiple select if so set ourselves as such
if (!mTreeView)
return false;
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (selection) {
bool single = false;
selection->GetSingle(&single);
if (!single) {
selection->SelectAll();
return true;
}
}
return false;
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeAccessible: Accessible implementation
Accessible*
XULTreeAccessible::GetChildAt(uint32_t aIndex) const
{
uint32_t childCount = Accessible::ChildCount();
if (aIndex < childCount)
return Accessible::GetChildAt(aIndex);
return GetTreeItemAccessible(aIndex - childCount);
}
uint32_t
XULTreeAccessible::ChildCount() const
{
// Tree's children count is row count + treecols count.
uint32_t childCount = Accessible::ChildCount();
if (!mTreeView)
return childCount;
int32_t rowCount = 0;
mTreeView->GetRowCount(&rowCount);
childCount += rowCount;
return childCount;
}
Relation
XULTreeAccessible::RelationByType(RelationType aType)
{
if (aType == RelationType::NODE_PARENT_OF) {
if (mTreeView)
return Relation(new XULTreeItemIterator(this, mTreeView, -1));
return Relation();
}
return Accessible::RelationByType(aType);
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeAccessible: Widgets
bool
XULTreeAccessible::IsWidget() const
{
return true;
}
bool
XULTreeAccessible::IsActiveWidget() const
{
if (IsAutoCompletePopup()) {
nsCOMPtr<nsIAutoCompletePopup> autoCompletePopupElm =
do_QueryInterface(mContent->GetParent());
if (autoCompletePopupElm) {
bool isOpen = false;
autoCompletePopupElm->GetPopupOpen(&isOpen);
return isOpen;
}
}
return FocusMgr()->HasDOMFocus(mContent);
}
bool
XULTreeAccessible::AreItemsOperable() const
{
if (IsAutoCompletePopup()) {
nsCOMPtr<nsIAutoCompletePopup> autoCompletePopupElm =
do_QueryInterface(mContent->GetParent());
if (autoCompletePopupElm) {
bool isOpen = false;
autoCompletePopupElm->GetPopupOpen(&isOpen);
return isOpen;
}
}
return true;
}
Accessible*
XULTreeAccessible::ContainerWidget() const
{
if (IsAutoCompletePopup()) {
// This works for XUL autocompletes. It doesn't work for HTML forms
// autocomplete because of potential crossprocess calls (when autocomplete
// lives in content process while popup lives in chrome process). If that's
// a problem then rethink Widgets interface.
nsCOMPtr<nsIDOMXULMenuListElement> menuListElm =
do_QueryInterface(mContent->GetParent());
if (menuListElm) {
nsCOMPtr<nsIDOMNode> inputElm;
menuListElm->GetInputField(getter_AddRefs(inputElm));
if (inputElm) {
nsCOMPtr<nsINode> inputNode = do_QueryInterface(inputElm);
if (inputNode) {
Accessible* input =
mDoc->GetAccessible(inputNode);
return input ? input->ContainerWidget() : nullptr;
}
}
}
}
return nullptr;
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeAccessible: public implementation
Accessible*
XULTreeAccessible::GetTreeItemAccessible(int32_t aRow) const
{
if (aRow < 0 || IsDefunct() || !mTreeView)
return nullptr;
int32_t rowCount = 0;
nsresult rv = mTreeView->GetRowCount(&rowCount);
if (NS_FAILED(rv) || aRow >= rowCount)
return nullptr;
void *key = reinterpret_cast<void*>(aRow);
Accessible* cachedTreeItem = mAccessibleCache.GetWeak(key);
if (cachedTreeItem)
return cachedTreeItem;
RefPtr<Accessible> treeItem = CreateTreeItemAccessible(aRow);
if (treeItem) {
mAccessibleCache.Put(key, treeItem);
Document()->BindToDocument(treeItem, nullptr);
return treeItem;
}
return nullptr;
}
void
XULTreeAccessible::InvalidateCache(int32_t aRow, int32_t aCount)
{
if (IsDefunct())
return;
if (!mTreeView) {
UnbindCacheEntriesFromDocument(mAccessibleCache);
return;
}
// Do not invalidate the cache if rows have been inserted.
if (aCount > 0)
return;
DocAccessible* document = Document();
// Fire destroy event for removed tree items and delete them from caches.
for (int32_t rowIdx = aRow; rowIdx < aRow - aCount; rowIdx++) {
void* key = reinterpret_cast<void*>(rowIdx);
Accessible* treeItem = mAccessibleCache.GetWeak(key);
if (treeItem) {
RefPtr<AccEvent> event =
new AccEvent(nsIAccessibleEvent::EVENT_HIDE, treeItem);
nsEventShell::FireEvent(event);
// Unbind from document, shutdown and remove from tree cache.
document->UnbindFromDocument(treeItem);
mAccessibleCache.Remove(key);
}
}
// We dealt with removed tree items already however we may keep tree items
// having row indexes greater than row count. We should remove these dead tree
// items silently from caches.
int32_t newRowCount = 0;
nsresult rv = mTreeView->GetRowCount(&newRowCount);
if (NS_FAILED(rv))
return;
int32_t oldRowCount = newRowCount - aCount;
for (int32_t rowIdx = newRowCount; rowIdx < oldRowCount; ++rowIdx) {
void *key = reinterpret_cast<void*>(rowIdx);
Accessible* treeItem = mAccessibleCache.GetWeak(key);
if (treeItem) {
// Unbind from document, shutdown and remove from tree cache.
document->UnbindFromDocument(treeItem);
mAccessibleCache.Remove(key);
}
}
}
void
XULTreeAccessible::TreeViewInvalidated(int32_t aStartRow, int32_t aEndRow,
int32_t aStartCol, int32_t aEndCol)
{
if (IsDefunct())
return;
if (!mTreeView) {
UnbindCacheEntriesFromDocument(mAccessibleCache);
return;
}
int32_t endRow = aEndRow;
nsresult rv;
if (endRow == -1) {
int32_t rowCount = 0;
rv = mTreeView->GetRowCount(&rowCount);
if (NS_FAILED(rv))
return;
endRow = rowCount - 1;
}
nsCOMPtr<nsITreeColumns> treeColumns;
mTree->GetColumns(getter_AddRefs(treeColumns));
if (!treeColumns)
return;
int32_t endCol = aEndCol;
if (endCol == -1) {
int32_t colCount = 0;
rv = treeColumns->GetCount(&colCount);
if (NS_FAILED(rv))
return;
endCol = colCount - 1;
}
for (int32_t rowIdx = aStartRow; rowIdx <= endRow; ++rowIdx) {
void *key = reinterpret_cast<void*>(rowIdx);
Accessible* accessible = mAccessibleCache.GetWeak(key);
if (accessible) {
RefPtr<XULTreeItemAccessibleBase> treeitemAcc = do_QueryObject(accessible);
NS_ASSERTION(treeitemAcc, "Wrong accessible at the given key!");
treeitemAcc->RowInvalidated(aStartCol, endCol);
}
}
}
void
XULTreeAccessible::TreeViewChanged(nsITreeView* aView)
{
if (IsDefunct())
return;
// Fire reorder event on tree accessible on accessible tree (do not fire
// show/hide events on tree items because it can be expensive to fire them for
// each tree item.
RefPtr<AccReorderEvent> reorderEvent = new AccReorderEvent(this);
Document()->FireDelayedEvent(reorderEvent);
// Clear cache.
UnbindCacheEntriesFromDocument(mAccessibleCache);
mTreeView = aView;
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeAccessible: protected implementation
already_AddRefed<Accessible>
XULTreeAccessible::CreateTreeItemAccessible(int32_t aRow) const
{
RefPtr<Accessible> accessible =
new XULTreeItemAccessible(mContent, mDoc, const_cast<XULTreeAccessible*>(this),
mTree, mTreeView, aRow);
return accessible.forget();
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessibleBase
////////////////////////////////////////////////////////////////////////////////
XULTreeItemAccessibleBase::
XULTreeItemAccessibleBase(nsIContent* aContent, DocAccessible* aDoc,
Accessible* aParent, nsITreeBoxObject* aTree,
nsITreeView* aTreeView, int32_t aRow) :
AccessibleWrap(aContent, aDoc),
mTree(aTree), mTreeView(aTreeView), mRow(aRow)
{
mParent = aParent;
mStateFlags |= eSharedNode;
}
XULTreeItemAccessibleBase::~XULTreeItemAccessibleBase()
{
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessibleBase: nsISupports implementation
NS_IMPL_CYCLE_COLLECTION_INHERITED(XULTreeItemAccessibleBase, Accessible,
mTree)
NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(XULTreeItemAccessibleBase)
NS_INTERFACE_TABLE_INHERITED(XULTreeItemAccessibleBase,
XULTreeItemAccessibleBase)
NS_INTERFACE_TABLE_TAIL_INHERITING(Accessible)
NS_IMPL_ADDREF_INHERITED(XULTreeItemAccessibleBase, Accessible)
NS_IMPL_RELEASE_INHERITED(XULTreeItemAccessibleBase, Accessible)
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessibleBase: Accessible
Accessible*
XULTreeItemAccessibleBase::FocusedChild()
{
return FocusMgr()->FocusedAccessible() == this ? this : nullptr;
}
nsIntRect
XULTreeItemAccessibleBase::Bounds() const
{
// Get x coordinate and width from treechildren element, get y coordinate and
// height from tree cell.
nsCOMPtr<nsIBoxObject> boxObj = nsCoreUtils::GetTreeBodyBoxObject(mTree);
if (!boxObj)
return nsIntRect();
nsCOMPtr<nsITreeColumn> column = nsCoreUtils::GetFirstSensibleColumn(mTree);
int32_t x = 0, y = 0, width = 0, height = 0;
nsresult rv = mTree->GetCoordsForCellItem(mRow, column, EmptyString(),
&x, &y, &width, &height);
if (NS_FAILED(rv))
return nsIntRect();
boxObj->GetWidth(&width);
int32_t tcX = 0, tcY = 0;
boxObj->GetScreenX(&tcX);
boxObj->GetScreenY(&tcY);
x = tcX;
y += tcY;
nsPresContext* presContext = mDoc->PresContext();
return nsIntRect(presContext->CSSPixelsToDevPixels(x),
presContext->CSSPixelsToDevPixels(y),
presContext->CSSPixelsToDevPixels(width),
presContext->CSSPixelsToDevPixels(height));
}
void
XULTreeItemAccessibleBase::SetSelected(bool aSelect)
{
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (selection) {
bool isSelected = false;
selection->IsSelected(mRow, &isSelected);
if (isSelected != aSelect)
selection->ToggleSelect(mRow);
}
}
void
XULTreeItemAccessibleBase::TakeFocus()
{
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (selection)
selection->SetCurrentIndex(mRow);
// focus event will be fired here
Accessible::TakeFocus();
}
Relation
XULTreeItemAccessibleBase::RelationByType(RelationType aType)
{
switch (aType) {
case RelationType::NODE_CHILD_OF: {
int32_t parentIndex = -1;
if (!NS_SUCCEEDED(mTreeView->GetParentIndex(mRow, &parentIndex)))
return Relation();
if (parentIndex == -1)
return Relation(mParent);
XULTreeAccessible* treeAcc = mParent->AsXULTree();
return Relation(treeAcc->GetTreeItemAccessible(parentIndex));
}
case RelationType::NODE_PARENT_OF: {
bool isTrue = false;
if (NS_FAILED(mTreeView->IsContainerEmpty(mRow, &isTrue)) || isTrue)
return Relation();
if (NS_FAILED(mTreeView->IsContainerOpen(mRow, &isTrue)) || !isTrue)
return Relation();
XULTreeAccessible* tree = mParent->AsXULTree();
return Relation(new XULTreeItemIterator(tree, mTreeView, mRow));
}
default:
return Relation();
}
}
uint8_t
XULTreeItemAccessibleBase::ActionCount()
{
// "activate" action is available for all treeitems, "expand/collapse" action
// is avaible for treeitem which is container.
return IsExpandable() ? 2 : 1;
}
void
XULTreeItemAccessibleBase::ActionNameAt(uint8_t aIndex, nsAString& aName)
{
if (aIndex == eAction_Click) {
aName.AssignLiteral("activate");
return;
}
if (aIndex == eAction_Expand && IsExpandable()) {
bool isContainerOpen = false;
mTreeView->IsContainerOpen(mRow, &isContainerOpen);
if (isContainerOpen)
aName.AssignLiteral("collapse");
else
aName.AssignLiteral("expand");
}
}
bool
XULTreeItemAccessibleBase::DoAction(uint8_t aIndex)
{
if (aIndex != eAction_Click &&
(aIndex != eAction_Expand || !IsExpandable()))
return false;
DoCommand(nullptr, aIndex);
return true;
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessibleBase: Accessible implementation
void
XULTreeItemAccessibleBase::Shutdown()
{
mTree = nullptr;
mTreeView = nullptr;
mRow = -1;
AccessibleWrap::Shutdown();
}
GroupPos
XULTreeItemAccessibleBase::GroupPosition()
{
GroupPos groupPos;
int32_t level;
nsresult rv = mTreeView->GetLevel(mRow, &level);
NS_ENSURE_SUCCESS(rv, groupPos);
int32_t topCount = 1;
for (int32_t index = mRow - 1; index >= 0; index--) {
int32_t lvl = -1;
if (NS_SUCCEEDED(mTreeView->GetLevel(index, &lvl))) {
if (lvl < level)
break;
if (lvl == level)
topCount++;
}
}
int32_t rowCount = 0;
rv = mTreeView->GetRowCount(&rowCount);
NS_ENSURE_SUCCESS(rv, groupPos);
int32_t bottomCount = 0;
for (int32_t index = mRow + 1; index < rowCount; index++) {
int32_t lvl = -1;
if (NS_SUCCEEDED(mTreeView->GetLevel(index, &lvl))) {
if (lvl < level)
break;
if (lvl == level)
bottomCount++;
}
}
groupPos.level = level + 1;
groupPos.setSize = topCount + bottomCount;
groupPos.posInSet = topCount;
return groupPos;
}
uint64_t
XULTreeItemAccessibleBase::NativeState()
{
// focusable and selectable states
uint64_t state = NativeInteractiveState();
// expanded/collapsed state
if (IsExpandable()) {
bool isContainerOpen;
mTreeView->IsContainerOpen(mRow, &isContainerOpen);
state |= isContainerOpen ? states::EXPANDED : states::COLLAPSED;
}
// selected state
nsCOMPtr<nsITreeSelection> selection;
mTreeView->GetSelection(getter_AddRefs(selection));
if (selection) {
bool isSelected;
selection->IsSelected(mRow, &isSelected);
if (isSelected)
state |= states::SELECTED;
}
// focused state
if (FocusMgr()->IsFocused(this))
state |= states::FOCUSED;
// invisible state
int32_t firstVisibleRow, lastVisibleRow;
mTree->GetFirstVisibleRow(&firstVisibleRow);
mTree->GetLastVisibleRow(&lastVisibleRow);
if (mRow < firstVisibleRow || mRow > lastVisibleRow)
state |= states::INVISIBLE;
return state;
}
uint64_t
XULTreeItemAccessibleBase::NativeInteractiveState() const
{
return states::FOCUSABLE | states::SELECTABLE;
}
int32_t
XULTreeItemAccessibleBase::IndexInParent() const
{
return mParent ? mParent->ContentChildCount() + mRow : -1;
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessibleBase: Widgets
Accessible*
XULTreeItemAccessibleBase::ContainerWidget() const
{
return mParent;
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessibleBase: Accessible protected methods
void
XULTreeItemAccessibleBase::DispatchClickEvent(nsIContent* aContent,
uint32_t aActionIndex)
{
if (IsDefunct())
return;
nsCOMPtr<nsITreeColumns> columns;
mTree->GetColumns(getter_AddRefs(columns));
if (!columns)
return;
// Get column and pseudo element.
nsCOMPtr<nsITreeColumn> column;
nsAutoString pseudoElm;
if (aActionIndex == eAction_Click) {
// Key column is visible and clickable.
columns->GetKeyColumn(getter_AddRefs(column));
} else {
// Primary column contains a twisty we should click on.
columns->GetPrimaryColumn(getter_AddRefs(column));
pseudoElm = NS_LITERAL_STRING("twisty");
}
if (column)
nsCoreUtils::DispatchClickEvent(mTree, mRow, column, pseudoElm);
}
Accessible*
XULTreeItemAccessibleBase::GetSiblingAtOffset(int32_t aOffset,
nsresult* aError) const
{
if (aError)
*aError = NS_OK; // fail peacefully
return mParent->GetChildAt(IndexInParent() + aOffset);
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessibleBase: protected implementation
bool
XULTreeItemAccessibleBase::IsExpandable()
{
bool isContainer = false;
mTreeView->IsContainer(mRow, &isContainer);
if (isContainer) {
bool isEmpty = false;
mTreeView->IsContainerEmpty(mRow, &isEmpty);
if (!isEmpty) {
nsCOMPtr<nsITreeColumns> columns;
mTree->GetColumns(getter_AddRefs(columns));
nsCOMPtr<nsITreeColumn> primaryColumn;
if (columns) {
columns->GetPrimaryColumn(getter_AddRefs(primaryColumn));
if (primaryColumn &&
!nsCoreUtils::IsColumnHidden(primaryColumn))
return true;
}
}
}
return false;
}
void
XULTreeItemAccessibleBase::GetCellName(nsITreeColumn* aColumn, nsAString& aName)
{
mTreeView->GetCellText(mRow, aColumn, aName);
// If there is still no name try the cell value:
// This is for graphical cells. We need tree/table view implementors to
// implement FooView::GetCellValue to return a meaningful string for cases
// where there is something shown in the cell (non-text) such as a star icon;
// in which case GetCellValue for that cell would return "starred" or
// "flagged" for example.
if (aName.IsEmpty())
mTreeView->GetCellValue(mRow, aColumn, aName);
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessible
////////////////////////////////////////////////////////////////////////////////
XULTreeItemAccessible::
XULTreeItemAccessible(nsIContent* aContent, DocAccessible* aDoc,
Accessible* aParent, nsITreeBoxObject* aTree,
nsITreeView* aTreeView, int32_t aRow) :
XULTreeItemAccessibleBase(aContent, aDoc, aParent, aTree, aTreeView, aRow)
{
mColumn = nsCoreUtils::GetFirstSensibleColumn(mTree);
GetCellName(mColumn, mCachedName);
}
XULTreeItemAccessible::~XULTreeItemAccessible()
{
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessible: nsISupports implementation
NS_IMPL_CYCLE_COLLECTION_INHERITED(XULTreeItemAccessible,
XULTreeItemAccessibleBase,
mColumn)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(XULTreeItemAccessible)
NS_INTERFACE_MAP_END_INHERITING(XULTreeItemAccessibleBase)
NS_IMPL_ADDREF_INHERITED(XULTreeItemAccessible, XULTreeItemAccessibleBase)
NS_IMPL_RELEASE_INHERITED(XULTreeItemAccessible, XULTreeItemAccessibleBase)
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessible: nsIAccessible implementation
ENameValueFlag
XULTreeItemAccessible::Name(nsString& aName)
{
aName.Truncate();
GetCellName(mColumn, aName);
return eNameOK;
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessible: Accessible implementation
void
XULTreeItemAccessible::Shutdown()
{
mColumn = nullptr;
XULTreeItemAccessibleBase::Shutdown();
}
role
XULTreeItemAccessible::NativeRole()
{
nsCOMPtr<nsITreeColumns> columns;
mTree->GetColumns(getter_AddRefs(columns));
if (!columns) {
NS_ERROR("No tree columns object in the tree!");
return roles::NOTHING;
}
nsCOMPtr<nsITreeColumn> primaryColumn;
columns->GetPrimaryColumn(getter_AddRefs(primaryColumn));
return primaryColumn ? roles::OUTLINEITEM : roles::LISTITEM;
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessible: XULTreeItemAccessibleBase implementation
void
XULTreeItemAccessible::RowInvalidated(int32_t aStartColIdx, int32_t aEndColIdx)
{
nsAutoString name;
Name(name);
if (name != mCachedName) {
nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_NAME_CHANGE, this);
mCachedName = name;
}
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeItemAccessible: Accessible protected implementation
void
XULTreeItemAccessible::CacheChildren()
{
}
////////////////////////////////////////////////////////////////////////////////
// XULTreeColumAccessible
////////////////////////////////////////////////////////////////////////////////
XULTreeColumAccessible::
XULTreeColumAccessible(nsIContent* aContent, DocAccessible* aDoc) :
XULColumAccessible(aContent, aDoc)
{
}
Accessible*
XULTreeColumAccessible::GetSiblingAtOffset(int32_t aOffset,
nsresult* aError) const
{
if (aOffset < 0)
return XULColumAccessible::GetSiblingAtOffset(aOffset, aError);
if (aError)
*aError = NS_OK; // fail peacefully
nsCOMPtr<nsITreeBoxObject> tree = nsCoreUtils::GetTreeBoxObject(mContent);
if (tree) {
nsCOMPtr<nsITreeView> treeView;
tree->GetView(getter_AddRefs(treeView));
if (treeView) {
int32_t rowCount = 0;
treeView->GetRowCount(&rowCount);
if (rowCount > 0 && aOffset <= rowCount) {
XULTreeAccessible* treeAcc = Parent()->AsXULTree();
if (treeAcc)
return treeAcc->GetTreeItemAccessible(aOffset - 1);
}
}
}
return nullptr;
}
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