C++ AccessibleWrap::Parent方法代码示例

static const gchar*
getKeyBindingCB(AtkAction *aAction, gint aActionIndex)
{
  AccessibleWrap* acc = GetAccessibleWrap(ATK_OBJECT(aAction));
  if (!acc)
    return nullptr;

  // Return all key bindings including access key and keyboard shortcut.
  nsAutoString keyBindingsStr;

  // Get access key.
  KeyBinding keyBinding = acc->AccessKey();
  if (!keyBinding.IsEmpty()) {
    keyBinding.AppendToString(keyBindingsStr, KeyBinding::eAtkFormat);

    Accessible* parent = acc->Parent();
    roles::Role role = parent ? parent->Role() : roles::NOTHING;
    if (role == roles::PARENT_MENUITEM || role == roles::MENUITEM ||
        role == roles::RADIO_MENU_ITEM || role == roles::CHECK_MENU_ITEM) {
      // It is submenu, expose keyboard shortcuts from menu hierarchy like
      // "s;<Alt>f:s"
      nsAutoString keysInHierarchyStr = keyBindingsStr;
      do {
        KeyBinding parentKeyBinding = parent->AccessKey();
        if (!parentKeyBinding.IsEmpty()) {
          nsAutoString str;
          parentKeyBinding.ToString(str, KeyBinding::eAtkFormat);
          str.Append(':');

          keysInHierarchyStr.Insert(str, 0);
        }
      } while ((parent = parent->Parent()) && parent->Role() != roles::MENUBAR);

      keyBindingsStr.Append(';');
      keyBindingsStr.Append(keysInHierarchyStr);
    }
  } else {
    // No access key, add ';' to point this.
    keyBindingsStr.Append(';');
  }

  // Get keyboard shortcut.
  keyBindingsStr.Append(';');
  keyBinding = acc->KeyboardShortcut();
  if (!keyBinding.IsEmpty()) {
    keyBinding.AppendToString(keyBindingsStr, KeyBinding::eAtkFormat);
  }

  return AccessibleWrap::ReturnString(keyBindingsStr);
}

gint
getIndexInParentCB(AtkObject *aAtkObj)
{
    // We don't use nsIAccessible::GetIndexInParent() because
    // for ATK we don't want to include text leaf nodes as children
    AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
    if (!accWrap) {
        return -1;
    }

    Accessible* parent = accWrap->Parent();
    if (!parent)
        return -1; // No parent

    return parent->GetIndexOfEmbeddedChild(accWrap);
}

gint
getIndexInParentCB(AtkObject* aAtkObj)
{
  // We don't use Accessible::IndexInParent() because we don't include text
  // leaf nodes as children in ATK.
    AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
    if (!accWrap) {
        return -1;
    }

    Accessible* parent = accWrap->Parent();
    if (!parent)
        return -1; // No parent

    return parent->GetIndexOfEmbeddedChild(accWrap);
}

STDMETHODIMP
ia2AccessibleComponent::get_locationInParent(long* aX, long* aY)
{
  A11Y_TRYBLOCK_BEGIN

  *aX = 0;
  *aY = 0;

  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
  if (acc->IsDefunct())
    return CO_E_OBJNOTCONNECTED;

  // If the object is not on any screen the returned position is (0,0).
  uint64_t state = acc->State();
  if (state & states::INVISIBLE)
    return S_OK;

  int32_t x = 0, y = 0, width = 0, height = 0;
  nsresult rv = acc->GetBounds(&x, &y, &width, &height);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  Accessible* parentAcc = acc->Parent();

  // The coordinates of the returned position are relative to this object's
  // parent or relative to the screen on which this object is rendered if it
  // has no parent.
  if (!parentAcc) {
    *aX = x;
    *aY = y;
    return S_OK;
  }

  // The coordinates of the bounding box are given relative to the parent's
  // coordinate system.
  int32_t parentx = 0, parenty = 0;
  rv = acc->GetBounds(&parentx, &parenty, &width, &height);
  if (NS_FAILED(rv))
    return GetHRESULT(rv);

  *aX = x - parentx;
  *aY = y - parenty;
  return S_OK;

  A11Y_TRYBLOCK_END
}

STDMETHODIMP
ia2Accessible::role(long* aRole)
{
  if (!aRole)
    return E_INVALIDARG;
  *aRole = 0;

  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
  if (acc->IsDefunct())
    return CO_E_OBJNOTCONNECTED;

#define ROLE(_geckoRole, stringRole, atkRole, macRole, \
             msaaRole, ia2Role, androidClass, nameRule) \
  case roles::_geckoRole: \
    *aRole = ia2Role; \
    break;

  a11y::role geckoRole;
  MOZ_ASSERT(!acc->IsProxy());
  geckoRole = acc->Role();
  switch (geckoRole) {
#include "RoleMap.h"
    default:
      MOZ_CRASH("Unknown role.");
  }

#undef ROLE

  // Special case, if there is a ROLE_ROW inside of a ROLE_TREE_TABLE, then call
  // the IA2 role a ROLE_OUTLINEITEM.
  MOZ_ASSERT(!acc->IsProxy());
  if (geckoRole == roles::ROW) {
    Accessible* xpParent = acc->Parent();
    if (xpParent && xpParent->Role() == roles::TREE_TABLE)
      *aRole = ROLE_SYSTEM_OUTLINEITEM;
  }

  return S_OK;
}