Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 405 insertions, 0 deletions

diff --git a/accessible/mac/AccessibleWrap.mm b/accessible/mac/AccessibleWrap.mm
new file mode 100644
index 0000000000..1bc49143da
--- /dev/null
+++ b/accessible/mac/AccessibleWrap.mm
@@ -0,0 +1,405 @@
+/* clang-format off */
+/* -*- Mode: Objective-C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* clang-format on */
+/* 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 "DocAccessibleWrap.h"
+#include "nsObjCExceptions.h"
+#include "nsCocoaUtils.h"
+#include "nsUnicharUtils.h"
+
+#include "LocalAccessible-inl.h"
+#include "nsAccUtils.h"
+#include "Role.h"
+#include "TextRange.h"
+#include "gfxPlatform.h"
+
+#import "MOXLandmarkAccessibles.h"
+#import "MOXMathAccessibles.h"
+#import "MOXTextMarkerDelegate.h"
+#import "MOXWebAreaAccessible.h"
+#import "mozAccessible.h"
+#import "mozActionElements.h"
+#import "mozHTMLAccessible.h"
+#import "mozSelectableElements.h"
+#import "mozTableAccessible.h"
+#import "mozTextAccessible.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+AccessibleWrap::AccessibleWrap(nsIContent* aContent, DocAccessible* aDoc)
+    : LocalAccessible(aContent, aDoc),
+      mNativeObject(nil),
+      mNativeInited(false) {
+  if (aContent && aContent->IsElement() && aDoc) {
+    // Check if this accessible is a live region and queue it
+    // it for dispatching an event after it has been inserted.
+    DocAccessibleWrap* doc = static_cast<DocAccessibleWrap*>(aDoc);
+    static const dom::Element::AttrValuesArray sLiveRegionValues[] = {
+        nsGkAtoms::OFF, nsGkAtoms::polite, nsGkAtoms::assertive, nullptr};
+    int32_t attrValue = nsAccUtils::FindARIAAttrValueIn(
+        aContent->AsElement(), nsGkAtoms::aria_live, sLiveRegionValues,
+        eIgnoreCase);
+    if (attrValue == 0) {
+      // aria-live is "off", do nothing.
+    } else if (attrValue > 0) {
+      // aria-live attribute is polite or assertive. It's live!
+      doc->QueueNewLiveRegion(this);
+    } else if (const nsRoleMapEntry* roleMap =
+                   aria::GetRoleMap(aContent->AsElement())) {
+      // aria role defines it as a live region. It's live!
+      if (roleMap->liveAttRule == ePoliteLiveAttr ||
+          roleMap->liveAttRule == eAssertiveLiveAttr) {
+        doc->QueueNewLiveRegion(this);
+      }
+    } else if (nsStaticAtom* value = GetAccService()->MarkupAttribute(
+                   aContent, nsGkAtoms::aria_live)) {
+      // HTML element defines it as a live region. It's live!
+      if (value == nsGkAtoms::polite || value == nsGkAtoms::assertive) {
+        doc->QueueNewLiveRegion(this);
+      }
+    }
+  }
+}
+
+AccessibleWrap::~AccessibleWrap() {}
+
+mozAccessible* AccessibleWrap::GetNativeObject() {
+  NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
+
+  if (!mNativeInited && !mNativeObject) {
+    // We don't creat OSX accessibles for xul tooltips, defunct accessibles,
+    // <br> (whitespace) elements, or pruned children.
+    //
+    // To maintain a scripting environment where the XPCOM accessible hierarchy
+    // look the same on all platforms, we still let the C++ objects be created
+    // though.
+    if (!IsXULTooltip() && !IsDefunct() && Role() != roles::WHITESPACE) {
+      mNativeObject = [[GetNativeType() alloc] initWithAccessible:this];
+    }
+  }
+
+  mNativeInited = true;
+
+  return mNativeObject;
+
+  NS_OBJC_END_TRY_BLOCK_RETURN(nil);
+}
+
+void AccessibleWrap::GetNativeInterface(void** aOutInterface) {
+  *aOutInterface = static_cast<void*>(GetNativeObject());
+}
+
+// overridden in subclasses to create the right kind of object. by default we
+// create a generic 'mozAccessible' node.
+Class AccessibleWrap::GetNativeType() {
+  NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
+
+  if (IsXULTabpanels()) {
+    return [mozPaneAccessible class];
+  }
+
+  if (IsTable()) {
+    return [mozTableAccessible class];
+  }
+
+  if (IsTableRow()) {
+    return [mozTableRowAccessible class];
+  }
+
+  if (IsTableCell()) {
+    return [mozTableCellAccessible class];
+  }
+
+  if (IsDoc()) {
+    return [MOXWebAreaAccessible class];
+  }
+
+  return GetTypeFromRole(Role());
+
+  NS_OBJC_END_TRY_BLOCK_RETURN(nil);
+}
+
+// this method is very important. it is fired when an accessible object "dies".
+// after this point the object might still be around (because some 3rd party
+// still has a ref to it), but it is in fact 'dead'.
+void AccessibleWrap::Shutdown() {
+  // this ensure we will not try to re-create the native object.
+  mNativeInited = true;
+
+  // we really intend to access the member directly.
+  if (mNativeObject) {
+    [mNativeObject expire];
+    [mNativeObject release];
+    mNativeObject = nil;
+  }
+
+  LocalAccessible::Shutdown();
+}
+
+nsresult AccessibleWrap::HandleAccEvent(AccEvent* aEvent) {
+  NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
+
+  nsresult rv = LocalAccessible::HandleAccEvent(aEvent);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (IsDefunct()) {
+    // The accessible can become defunct after their events are handled.
+    return NS_OK;
+  }
+
+  uint32_t eventType = aEvent->GetEventType();
+
+  if (eventType == nsIAccessibleEvent::EVENT_SHOW) {
+    DocAccessibleWrap* doc = static_cast<DocAccessibleWrap*>(Document());
+    doc->ProcessNewLiveRegions();
+  }
+
+  if (IPCAccessibilityActive()) {
+    return NS_OK;
+  }
+
+  LocalAccessible* eventTarget = nullptr;
+
+  switch (eventType) {
+    case nsIAccessibleEvent::EVENT_SELECTION:
+    case nsIAccessibleEvent::EVENT_SELECTION_ADD:
+    case nsIAccessibleEvent::EVENT_SELECTION_REMOVE: {
+      AccSelChangeEvent* selEvent = downcast_accEvent(aEvent);
+      // The "widget" is the selected widget's container. In OSX
+      // it is the target of the selection changed event.
+      eventTarget = selEvent->Widget();
+      break;
+    }
+    case nsIAccessibleEvent::EVENT_TEXT_INSERTED:
+    case nsIAccessibleEvent::EVENT_TEXT_REMOVED: {
+      LocalAccessible* acc = aEvent->GetAccessible();
+      // If there is a text input ancestor, use it as the event source.
+      while (acc && GetTypeFromRole(acc->Role()) != [mozTextAccessible class]) {
+        acc = acc->LocalParent();
+      }
+      eventTarget = acc ? acc : aEvent->GetAccessible();
+      break;
+    }
+    default:
+      eventTarget = aEvent->GetAccessible();
+      break;
+  }
+
+  mozAccessible* nativeAcc = nil;
+  eventTarget->GetNativeInterface((void**)&nativeAcc);
+  if (!nativeAcc) {
+    return NS_ERROR_FAILURE;
+  }
+
+  switch (eventType) {
+    case nsIAccessibleEvent::EVENT_STATE_CHANGE: {
+      AccStateChangeEvent* event = downcast_accEvent(aEvent);
+      [nativeAcc stateChanged:event->GetState()
+                    isEnabled:event->IsStateEnabled()];
+      break;
+    }
+
+    case nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED: {
+      MOXTextMarkerDelegate* delegate =
+          [MOXTextMarkerDelegate getOrCreateForDoc:aEvent->Document()];
+      AccTextSelChangeEvent* event = downcast_accEvent(aEvent);
+      AutoTArray<TextRange, 1> ranges;
+      event->SelectionRanges(&ranges);
+
+      if (ranges.Length()) {
+        // Cache selection in delegate.
+        [delegate setSelectionFrom:ranges[0].StartContainer()
+                                at:ranges[0].StartOffset()
+                                to:ranges[0].EndContainer()
+                                at:ranges[0].EndOffset()];
+      }
+
+      [nativeAcc handleAccessibleEvent:eventType];
+      break;
+    }
+
+    case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED: {
+      AccCaretMoveEvent* event = downcast_accEvent(aEvent);
+      int32_t caretOffset = event->GetCaretOffset();
+      MOXTextMarkerDelegate* delegate =
+          [MOXTextMarkerDelegate getOrCreateForDoc:aEvent->Document()];
+      [delegate setCaretOffset:eventTarget
+                            at:caretOffset
+               moveGranularity:event->GetGranularity()];
+      if (event->IsSelectionCollapsed()) {
+        // If the selection is collapsed, invalidate our text selection cache.
+        [delegate setSelectionFrom:eventTarget
+                                at:caretOffset
+                                to:eventTarget
+                                at:caretOffset];
+      }
+
+      if (mozTextAccessible* textAcc = static_cast<mozTextAccessible*>(
+              [nativeAcc moxEditableAncestor])) {
+        [textAcc
+            handleAccessibleEvent:nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED];
+      } else {
+        [nativeAcc
+            handleAccessibleEvent:nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED];
+      }
+      break;
+    }
+
+    case nsIAccessibleEvent::EVENT_TEXT_INSERTED:
+    case nsIAccessibleEvent::EVENT_TEXT_REMOVED: {
+      AccTextChangeEvent* tcEvent = downcast_accEvent(aEvent);
+      [nativeAcc handleAccessibleTextChangeEvent:nsCocoaUtils::ToNSString(
+                                                     tcEvent->ModifiedText())
+                                        inserted:tcEvent->IsTextInserted()
+                                     inContainer:aEvent->GetAccessible()
+                                              at:tcEvent->GetStartOffset()];
+      break;
+    }
+
+    case nsIAccessibleEvent::EVENT_ALERT:
+    case nsIAccessibleEvent::EVENT_FOCUS:
+    case nsIAccessibleEvent::EVENT_TEXT_VALUE_CHANGE:
+    case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE:
+    case nsIAccessibleEvent::EVENT_MENUPOPUP_START:
+    case nsIAccessibleEvent::EVENT_MENUPOPUP_END:
+    case nsIAccessibleEvent::EVENT_REORDER:
+    case nsIAccessibleEvent::EVENT_SELECTION:
+    case nsIAccessibleEvent::EVENT_SELECTION_ADD:
+    case nsIAccessibleEvent::EVENT_SELECTION_REMOVE:
+    case nsIAccessibleEvent::EVENT_LIVE_REGION_ADDED:
+    case nsIAccessibleEvent::EVENT_LIVE_REGION_REMOVED:
+    case nsIAccessibleEvent::EVENT_NAME_CHANGE:
+    case nsIAccessibleEvent::EVENT_OBJECT_ATTRIBUTE_CHANGED:
+      [nativeAcc handleAccessibleEvent:eventType];
+      break;
+
+    default:
+      break;
+  }
+
+  return NS_OK;
+
+  NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AccessibleWrap protected
+
+Class a11y::GetTypeFromRole(roles::Role aRole) {
+  NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
+
+  switch (aRole) {
+    case roles::COMBOBOX:
+      return [mozPopupButtonAccessible class];
+
+    case roles::PUSHBUTTON:
+      return [mozButtonAccessible class];
+
+    case roles::PAGETAB:
+      return [mozTabAccessible class];
+
+    case roles::DATE_EDITOR:
+      return [mozDatePickerAccessible class];
+
+    case roles::CHECKBUTTON:
+    case roles::TOGGLE_BUTTON:
+    case roles::SWITCH:
+    case roles::CHECK_MENU_ITEM:
+      return [mozCheckboxAccessible class];
+
+    case roles::RADIOBUTTON:
+    case roles::RADIO_MENU_ITEM:
+      return [mozRadioButtonAccessible class];
+
+    case roles::SPINBUTTON:
+    case roles::SLIDER:
+      return [mozIncrementableAccessible class];
+
+    case roles::HEADING:
+      return [mozHeadingAccessible class];
+
+    case roles::PAGETABLIST:
+      return [mozTabGroupAccessible class];
+
+    case roles::ENTRY:
+    case roles::CAPTION:
+    case roles::ACCEL_LABEL:
+    case roles::EDITCOMBOBOX:
+    case roles::PASSWORD_TEXT:
+      // normal textfield (static or editable)
+      return [mozTextAccessible class];
+
+    case roles::TEXT_LEAF:
+    case roles::STATICTEXT:
+      return [mozTextLeafAccessible class];
+
+    case roles::LANDMARK:
+      return [MOXLandmarkAccessible class];
+
+    case roles::LINK:
+      return [mozLinkAccessible class];
+
+    case roles::LISTBOX:
+      return [mozListboxAccessible class];
+
+    case roles::LISTITEM:
+      return [MOXListItemAccessible class];
+
+    case roles::OPTION: {
+      return [mozOptionAccessible class];
+    }
+
+    case roles::RICH_OPTION: {
+      return [mozSelectableChildAccessible class];
+    }
+
+    case roles::COMBOBOX_LIST:
+    case roles::MENUBAR:
+    case roles::MENUPOPUP: {
+      return [mozMenuAccessible class];
+    }
+
+    case roles::COMBOBOX_OPTION:
+    case roles::PARENT_MENUITEM:
+    case roles::MENUITEM: {
+      return [mozMenuItemAccessible class];
+    }
+
+    case roles::MATHML_ROOT:
+      return [MOXMathRootAccessible class];
+
+    case roles::MATHML_SQUARE_ROOT:
+      return [MOXMathSquareRootAccessible class];
+
+    case roles::MATHML_FRACTION:
+      return [MOXMathFractionAccessible class];
+
+    case roles::MATHML_SUB:
+    case roles::MATHML_SUP:
+    case roles::MATHML_SUB_SUP:
+      return [MOXMathSubSupAccessible class];
+
+    case roles::MATHML_UNDER:
+    case roles::MATHML_OVER:
+    case roles::MATHML_UNDER_OVER:
+      return [MOXMathUnderOverAccessible class];
+
+    case roles::OUTLINE:
+    case roles::TREE_TABLE:
+      return [mozOutlineAccessible class];
+
+    case roles::OUTLINEITEM:
+      return [mozOutlineRowAccessible class];
+
+    default:
+      return [mozAccessible class];
+  }
+
+  return nil;
+
+  NS_OBJC_END_TRY_BLOCK_RETURN(nil);
+}