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Diffstat (limited to 'accessible/xul/XULTreeAccessible.cpp')
| -rw-r--r-- | accessible/xul/XULTreeAccessible.cpp | 997 |
1 files changed, 997 insertions, 0 deletions
diff --git a/accessible/xul/XULTreeAccessible.cpp b/accessible/xul/XULTreeAccessible.cpp new file mode 100644 index 0000000000..8b69622394 --- /dev/null +++ b/accessible/xul/XULTreeAccessible.cpp @@ -0,0 +1,997 @@ +/* -*- 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 "nsIAutoCompletePopup.h" +#include "nsIDOMXULMenuListElement.h" +#include "nsITreeSelection.h" +#include "nsTreeBodyFrame.h" +#include "nsTreeColumns.h" +#include "nsTreeUtils.h" +#include "mozilla/PresShell.h" +#include "mozilla/dom/XULTreeElementBinding.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::GetTree(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(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() const { + // 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) const { + 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; + selection->GetCurrentIndex(¤tIndex); + if (currentIndex >= 0) { + RefPtr<nsTreeColumn> keyCol; + + RefPtr<nsTreeColumns> cols = mTree->GetColumns(); + if (cols) keyCol = cols->GetKeyColumn(); + + 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() const { + // 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(); + nsTreeColumn* primaryCol = cols->GetPrimaryColumn(); + + 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(); + PresShell* presShell = presContext->PresShell(); + + nsIFrame* rootFrame = presShell->GetRootFrame(); + NS_ENSURE_TRUE(rootFrame, nullptr); + + CSSIntRect rootRect = rootFrame->GetScreenRect(); + + int32_t clientX = presContext->DevPixelsToIntCSSPixels(aX) - rootRect.X(); + int32_t clientY = presContext->DevPixelsToIntCSSPixels(aY) - rootRect.Y(); + + ErrorResult rv; + dom::TreeCellInfo cellInfo; + mTree->GetCellAt(clientX, clientY, cellInfo, rv); + + // If we failed to find tree cell for the given point then it might be + // tree columns. + if (cellInfo.mRow == -1 || !cellInfo.mCol) + return AccessibleWrap::ChildAtPoint(aX, aY, aWhichChild); + + Accessible* child = GetTreeItemAccessible(cellInfo.mRow); + if (aWhichChild == eDeepestChild && child) { + // Look for accessible cell for the found item accessible. + RefPtr<XULTreeItemAccessibleBase> treeitem = do_QueryObject(child); + + Accessible* cell = treeitem->GetCellAccessible(cellInfo.mCol); + if (cell) child = cell; + } + + return child; +} + +//////////////////////////////////////////////////////////////////////////////// +// XULTreeAccessible: SelectAccessible + +Accessible* XULTreeAccessible::CurrentItem() const { + if (!mTreeView) return nullptr; + + nsCOMPtr<nsITreeSelection> selection; + mTreeView->GetSelection(getter_AddRefs(selection)); + if (selection) { + int32_t currentIndex = -1; + selection->GetCurrentIndex(¤tIndex); + if (currentIndex >= 0) return GetTreeItemAccessible(currentIndex); + } + + return nullptr; +} + +void XULTreeAccessible::SetCurrentItem(const 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) const { + 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() && mContent->GetParent()) { + // 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 = + mContent->GetParent()->AsElement()->AsXULMenuList(); + if (menuListElm) { + RefPtr<mozilla::dom::Element> inputElm; + menuListElm->GetInputField(getter_AddRefs(inputElm)); + if (inputElm) { + Accessible* input = mDoc->GetAccessible(inputElm); + 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*>(intptr_t(aRow)); + Accessible* cachedTreeItem = mAccessibleCache.GetWeak(key); + if (cachedTreeItem) return cachedTreeItem; + + RefPtr<Accessible> treeItem = CreateTreeItemAccessible(aRow); + if (treeItem) { + mAccessibleCache.Put(key, RefPtr{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*>(intptr_t(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*>(intptr_t(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; + } + + RefPtr<nsTreeColumns> treeColumns = mTree->GetColumns(); + if (!treeColumns) return; + + int32_t endCol = aEndCol; + + if (endCol == -1) { + // We need to make sure to cast to int32_t before we do the subtraction, in + // case the column count is 0. + endCol = static_cast<int32_t>(treeColumns->Count()) - 1; + } + + for (int32_t rowIdx = aStartRow; rowIdx <= endRow; ++rowIdx) { + void* key = reinterpret_cast<void*>(intptr_t(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; + Accessible* item = CurrentItem(); + if (item) { + FocusMgr()->ActiveItemChanged(item, true); + } +} + +//////////////////////////////////////////////////////////////////////////////// +// 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, + dom::XULTreeElement* 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_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(XULTreeItemAccessibleBase, + Accessible, + XULTreeItemAccessibleBase) + +//////////////////////////////////////////////////////////////////////////////// +// XULTreeItemAccessibleBase: Accessible + +Accessible* XULTreeItemAccessibleBase::FocusedChild() { + return FocusMgr()->FocusedAccessible() == this ? this : nullptr; +} + +nsIntRect XULTreeItemAccessibleBase::BoundsInCSSPixels() const { + // Get x coordinate and width from treechildren element, get y coordinate and + // height from tree cell. + + RefPtr<nsTreeColumn> column = nsCoreUtils::GetFirstSensibleColumn(mTree); + + nsresult rv; + nsIntRect rect = mTree->GetCoordsForCellItem(mRow, column, u"cell"_ns, rv); + if (NS_FAILED(rv)) { + return nsIntRect(); + } + + RefPtr<dom::Element> bodyElement = mTree->GetTreeBody(); + if (!bodyElement || !bodyElement->IsXULElement()) { + return nsIntRect(); + } + + rect.width = bodyElement->ClientWidth(); + + nsIFrame* bodyFrame = bodyElement->GetPrimaryFrame(); + if (!bodyFrame) { + return nsIntRect(); + } + + CSSIntRect screenRect = bodyFrame->GetScreenRect(); + rect.x = screenRect.x; + rect.y += screenRect.y; + return rect; +} + +nsRect XULTreeItemAccessibleBase::BoundsInAppUnits() const { + nsIntRect bounds = BoundsInCSSPixels(); + nsPresContext* presContext = mDoc->PresContext(); + return nsRect(presContext->CSSPixelsToAppUnits(bounds.X()), + presContext->CSSPixelsToAppUnits(bounds.Y()), + presContext->CSSPixelsToAppUnits(bounds.Width()), + presContext->CSSPixelsToAppUnits(bounds.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() const { + 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) const { + 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() const { + // "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) const { + 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; + mParent = nullptr; // null-out to prevent base class's shutdown ops + + 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() const { + // 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 = mTree->GetFirstVisibleRow(); + int32_t lastVisibleRow = mTree->GetLastVisibleRow(); + 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) const { + if (IsDefunct()) return; + + RefPtr<nsTreeColumns> columns = mTree->GetColumns(); + if (!columns) return; + + // Get column and pseudo element. + RefPtr<nsTreeColumn> column; + nsAutoString pseudoElm; + + if (aActionIndex == eAction_Click) { + // Key column is visible and clickable. + column = columns->GetKeyColumn(); + } else { + // Primary column contains a twisty we should click on. + column = columns->GetPrimaryColumn(); + pseudoElm = u"twisty"_ns; + } + + if (column) { + RefPtr<dom::XULTreeElement> tree = mTree; + nsCoreUtils::DispatchClickEvent(tree, 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() const { + bool isContainer = false; + mTreeView->IsContainer(mRow, &isContainer); + if (isContainer) { + bool isEmpty = false; + mTreeView->IsContainerEmpty(mRow, &isEmpty); + if (!isEmpty) { + RefPtr<nsTreeColumns> columns = mTree->GetColumns(); + if (columns) { + nsTreeColumn* primaryColumn = columns->GetPrimaryColumn(); + if (primaryColumn && !nsCoreUtils::IsColumnHidden(primaryColumn)) + return true; + } + } + } + + return false; +} + +void XULTreeItemAccessibleBase::GetCellName(nsTreeColumn* aColumn, + nsAString& aName) const { + 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, + dom::XULTreeElement* aTree, nsITreeView* aTreeView, int32_t aRow) + : XULTreeItemAccessibleBase(aContent, aDoc, aParent, aTree, aTreeView, + aRow) { + mStateFlags |= eNoKidsFromDOM; + mColumn = nsCoreUtils::GetFirstSensibleColumn(mTree, FlushType::None); + GetCellName(mColumn, mCachedName); +} + +XULTreeItemAccessible::~XULTreeItemAccessible() {} + +//////////////////////////////////////////////////////////////////////////////// +// XULTreeItemAccessible: nsISupports implementation + +NS_IMPL_CYCLE_COLLECTION_INHERITED(XULTreeItemAccessible, + XULTreeItemAccessibleBase, mColumn) + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(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) const { + aName.Truncate(); + + GetCellName(mColumn, aName); + return eNameOK; +} + +//////////////////////////////////////////////////////////////////////////////// +// XULTreeItemAccessible: Accessible implementation + +void XULTreeItemAccessible::Shutdown() { + mColumn = nullptr; + XULTreeItemAccessibleBase::Shutdown(); +} + +role XULTreeItemAccessible::NativeRole() const { + RefPtr<nsTreeColumns> columns = mTree->GetColumns(); + if (!columns) { + NS_ERROR("No tree columns object in the tree!"); + return roles::NOTHING; + } + + nsTreeColumn* primaryColumn = columns->GetPrimaryColumn(); + + 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; + } +} + +//////////////////////////////////////////////////////////////////////////////// +// 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 + + RefPtr<dom::XULTreeElement> tree = nsCoreUtils::GetTree(mContent); + if (tree) { + nsCOMPtr<nsITreeView> treeView = tree->GetView(FlushType::None); + 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; +} |