コード例 #1
0
nsresult
AccessibleWrap::FirePlatformEvent(AccEvent* aEvent)
{
    Accessible* accessible = aEvent->GetAccessible();
    NS_ENSURE_TRUE(accessible, NS_ERROR_FAILURE);

    PRUint32 type = aEvent->GetEventType();

    AtkObject* atkObj = AccessibleWrap::GetAtkObject(accessible);

    // We don't create ATK objects for nsIAccessible plain text leaves,
    // just return NS_OK in such case
    if (!atkObj) {
        NS_ASSERTION(type == nsIAccessibleEvent::EVENT_SHOW ||
                     type == nsIAccessibleEvent::EVENT_HIDE,
                     "Event other than SHOW and HIDE fired for plain text leaves");
        return NS_OK;
    }

    AccessibleWrap* accWrap = GetAccessibleWrap(atkObj);
    if (!accWrap) {
        return NS_OK; // Node is shut down
    }

    switch (type) {
    case nsIAccessibleEvent::EVENT_STATE_CHANGE:
        return FireAtkStateChangeEvent(aEvent, atkObj);

    case nsIAccessibleEvent::EVENT_TEXT_REMOVED:
    case nsIAccessibleEvent::EVENT_TEXT_INSERTED:
        return FireAtkTextChangedEvent(aEvent, atkObj);

    case nsIAccessibleEvent::EVENT_FOCUS:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_FOCUS\n"));
        a11y::RootAccessible* rootAccWrap = accWrap->RootAccessible();
        if (rootAccWrap && rootAccWrap->mActivated) {
            atk_focus_tracker_notify(atkObj);
            // Fire state change event for focus
            nsRefPtr<AccEvent> stateChangeEvent =
              new AccStateChangeEvent(accessible, states::FOCUSED, true);
            return FireAtkStateChangeEvent(stateChangeEvent, atkObj);
        }
      } break;

    case nsIAccessibleEvent::EVENT_NAME_CHANGE:
      {
        nsAutoString newName;
        accessible->Name(newName);
        NS_ConvertUTF16toUTF8 utf8Name(newName);
        if (!atkObj->name || !utf8Name.Equals(atkObj->name))
          atk_object_set_name(atkObj, utf8Name.get());

        break;
      }
    case nsIAccessibleEvent::EVENT_VALUE_CHANGE:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_VALUE_CHANGE\n"));
        nsCOMPtr<nsIAccessibleValue> value(do_QueryObject(accessible));
        if (value) {    // Make sure this is a numeric value
            // Don't fire for MSAA string value changes (e.g. text editing)
            // ATK values are always numeric
            g_object_notify( (GObject*)atkObj, "accessible-value" );
        }
      } break;

    case nsIAccessibleEvent::EVENT_SELECTION:
    case nsIAccessibleEvent::EVENT_SELECTION_ADD:
    case nsIAccessibleEvent::EVENT_SELECTION_REMOVE:
    {
      // XXX: dupe events may be fired
      MAI_LOG_DEBUG(("\n\nReceived: EVENT_SELECTION_CHANGED\n"));
      AccSelChangeEvent* selChangeEvent = downcast_accEvent(aEvent);
      g_signal_emit_by_name(AccessibleWrap::GetAtkObject(selChangeEvent->Widget()),
                            "selection_changed");
      break;
    }

    case nsIAccessibleEvent::EVENT_SELECTION_WITHIN:
    {
      MAI_LOG_DEBUG(("\n\nReceived: EVENT_SELECTION_CHANGED\n"));
      g_signal_emit_by_name(atkObj, "selection_changed");
      break;
    }

    case nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED:
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_TEXT_SELECTION_CHANGED\n"));
        g_signal_emit_by_name(atkObj, "text_selection_changed");
        break;

    case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_TEXT_CARET_MOVED\n"));

        AccCaretMoveEvent* caretMoveEvent = downcast_accEvent(aEvent);
        NS_ASSERTION(caretMoveEvent, "Event needs event data");
        if (!caretMoveEvent)
            break;

        PRInt32 caretOffset = caretMoveEvent->GetCaretOffset();

        MAI_LOG_DEBUG(("\n\nCaret postion: %d", caretOffset));
        g_signal_emit_by_name(atkObj,
                              "text_caret_moved",
                              // Curent caret position
                              caretOffset);
      } break;

    case nsIAccessibleEvent::EVENT_TEXT_ATTRIBUTE_CHANGED:
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_TEXT_ATTRIBUTE_CHANGED\n"));

        g_signal_emit_by_name(atkObj,
                              "text-attributes-changed");
        break;

    case nsIAccessibleEvent::EVENT_TABLE_MODEL_CHANGED:
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_TABLE_MODEL_CHANGED\n"));
        g_signal_emit_by_name(atkObj, "model_changed");
        break;

    case nsIAccessibleEvent::EVENT_TABLE_ROW_INSERT:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_TABLE_ROW_INSERT\n"));
        AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
        NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);

        PRInt32 rowIndex = tableEvent->GetIndex();
        PRInt32 numRows = tableEvent->GetCount();

        g_signal_emit_by_name(atkObj,
                              "row_inserted",
                              // After which the rows are inserted
                              rowIndex,
                              // The number of the inserted
                              numRows);
     } break;

   case nsIAccessibleEvent::EVENT_TABLE_ROW_DELETE:
     {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_TABLE_ROW_DELETE\n"));
        AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
        NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);

        PRInt32 rowIndex = tableEvent->GetIndex();
        PRInt32 numRows = tableEvent->GetCount();

        g_signal_emit_by_name(atkObj,
                              "row_deleted",
                              // After which the rows are deleted
                              rowIndex,
                              // The number of the deleted
                              numRows);
      } break;

    case nsIAccessibleEvent::EVENT_TABLE_ROW_REORDER:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_TABLE_ROW_REORDER\n"));
        g_signal_emit_by_name(atkObj, "row_reordered");
        break;
      }

    case nsIAccessibleEvent::EVENT_TABLE_COLUMN_INSERT:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_TABLE_COLUMN_INSERT\n"));
        AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
        NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);

        PRInt32 colIndex = tableEvent->GetIndex();
        PRInt32 numCols = tableEvent->GetCount();

        g_signal_emit_by_name(atkObj,
                              "column_inserted",
                              // After which the columns are inserted
                              colIndex,
                              // The number of the inserted
                              numCols);
      } break;

    case nsIAccessibleEvent::EVENT_TABLE_COLUMN_DELETE:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_TABLE_COLUMN_DELETE\n"));
        AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
        NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);

        PRInt32 colIndex = tableEvent->GetIndex();
        PRInt32 numCols = tableEvent->GetCount();

        g_signal_emit_by_name(atkObj,
                              "column_deleted",
                              // After which the columns are deleted
                              colIndex,
                              // The number of the deleted
                              numCols);
      } break;

    case nsIAccessibleEvent::EVENT_TABLE_COLUMN_REORDER:
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_TABLE_COLUMN_REORDER\n"));
        g_signal_emit_by_name(atkObj, "column_reordered");
        break;

    case nsIAccessibleEvent::EVENT_SECTION_CHANGED:
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_SECTION_CHANGED\n"));
        g_signal_emit_by_name(atkObj, "visible_data_changed");
        break;

    case nsIAccessibleEvent::EVENT_SHOW:
        return FireAtkShowHideEvent(aEvent, atkObj, true);

    case nsIAccessibleEvent::EVENT_HIDE:
        return FireAtkShowHideEvent(aEvent, atkObj, false);

        /*
         * Because dealing with menu is very different between nsIAccessible
         * and ATK, and the menu activity is important, specially transfer the
         * following two event.
         * Need more verification by AT test.
         */
    case nsIAccessibleEvent::EVENT_MENU_START:
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_MENU_START\n"));
        break;

    case nsIAccessibleEvent::EVENT_MENU_END:
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_MENU_END\n"));
        break;

    case nsIAccessibleEvent::EVENT_WINDOW_ACTIVATE:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_WINDOW_ACTIVATED\n"));
        accessible->AsRoot()->mActivated = true;
        guint id = g_signal_lookup ("activate", MAI_TYPE_ATK_OBJECT);
        g_signal_emit(atkObj, id, 0);

        // Always fire a current focus event after activation.
        FocusMgr()->ForceFocusEvent();
      } break;

    case nsIAccessibleEvent::EVENT_WINDOW_DEACTIVATE:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_WINDOW_DEACTIVATED\n"));
        accessible->AsRoot()->mActivated = false;
        guint id = g_signal_lookup ("deactivate", MAI_TYPE_ATK_OBJECT);
        g_signal_emit(atkObj, id, 0);
      } break;

    case nsIAccessibleEvent::EVENT_WINDOW_MAXIMIZE:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_WINDOW_MAXIMIZE\n"));
        guint id = g_signal_lookup ("maximize", MAI_TYPE_ATK_OBJECT);
        g_signal_emit(atkObj, id, 0);
      } break;

    case nsIAccessibleEvent::EVENT_WINDOW_MINIMIZE:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_WINDOW_MINIMIZE\n"));
        guint id = g_signal_lookup ("minimize", MAI_TYPE_ATK_OBJECT);
        g_signal_emit(atkObj, id, 0);
      } break;

    case nsIAccessibleEvent::EVENT_WINDOW_RESTORE:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_WINDOW_RESTORE\n"));
        guint id = g_signal_lookup ("restore", MAI_TYPE_ATK_OBJECT);
        g_signal_emit(atkObj, id, 0);
      } break;

    case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_DOCUMENT_LOAD_COMPLETE\n"));
        g_signal_emit_by_name (atkObj, "load_complete");
      } break;

    case nsIAccessibleEvent::EVENT_DOCUMENT_RELOAD:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_DOCUMENT_RELOAD\n"));
        g_signal_emit_by_name (atkObj, "reload");
      } break;

    case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_STOPPED:
      {
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_DOCUMENT_LOAD_STOPPED\n"));
        g_signal_emit_by_name (atkObj, "load_stopped");
      } break;

    case nsIAccessibleEvent::EVENT_MENUPOPUP_START:
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_MENUPOPUP_START\n"));
        atk_focus_tracker_notify(atkObj); // fire extra focus event
        atk_object_notify_state_change(atkObj, ATK_STATE_VISIBLE, true);
        atk_object_notify_state_change(atkObj, ATK_STATE_SHOWING, true);
        break;

    case nsIAccessibleEvent::EVENT_MENUPOPUP_END:
        MAI_LOG_DEBUG(("\n\nReceived: EVENT_MENUPOPUP_END\n"));
        atk_object_notify_state_change(atkObj, ATK_STATE_VISIBLE, false);
        atk_object_notify_state_change(atkObj, ATK_STATE_SHOWING, false);
        break;
    }

    return NS_OK;
}
コード例 #2
0
nsresult
AccessibleWrap::HandleAccEvent(AccEvent* aEvent)
{
  nsresult rv = Accessible::HandleAccEvent(aEvent);
  NS_ENSURE_SUCCESS(rv, rv);

    Accessible* accessible = aEvent->GetAccessible();
    NS_ENSURE_TRUE(accessible, NS_ERROR_FAILURE);

    // The accessible can become defunct if we have an xpcom event listener
    // which decides it would be fun to change the DOM and flush layout.
    if (accessible->IsDefunct())
        return NS_OK;

    uint32_t type = aEvent->GetEventType();

    AtkObject* atkObj = AccessibleWrap::GetAtkObject(accessible);

  // We don't create ATK objects for plain text leaves, just return NS_OK in
  // such case.
    if (!atkObj) {
        NS_ASSERTION(type == nsIAccessibleEvent::EVENT_SHOW ||
                     type == nsIAccessibleEvent::EVENT_HIDE,
                     "Event other than SHOW and HIDE fired for plain text leaves");
        return NS_OK;
    }

    AccessibleWrap* accWrap = GetAccessibleWrap(atkObj);
    if (!accWrap) {
        return NS_OK; // Node is shut down
    }

    switch (type) {
    case nsIAccessibleEvent::EVENT_STATE_CHANGE:
      {
        AccStateChangeEvent* event = downcast_accEvent(aEvent);
        MAI_ATK_OBJECT(atkObj)->FireStateChangeEvent(event->GetState(),
                                                     event->IsStateEnabled());
        break;
      }

    case nsIAccessibleEvent::EVENT_TEXT_REMOVED:
    case nsIAccessibleEvent::EVENT_TEXT_INSERTED:
        return FireAtkTextChangedEvent(aEvent, atkObj);

    case nsIAccessibleEvent::EVENT_FOCUS:
      {
        a11y::RootAccessible* rootAccWrap = accWrap->RootAccessible();
        if (rootAccWrap && rootAccWrap->mActivated) {
            atk_focus_tracker_notify(atkObj);
            // Fire state change event for focus
            atk_object_notify_state_change(atkObj, ATK_STATE_FOCUSED, true);
            return NS_OK;
        }
      } break;

    case nsIAccessibleEvent::EVENT_NAME_CHANGE:
      {
        nsAutoString newName;
        accessible->Name(newName);

        MaybeFireNameChange(atkObj, newName);

        break;
      }

  case nsIAccessibleEvent::EVENT_VALUE_CHANGE:
    if (accessible->HasNumericValue()) {
      // Make sure this is a numeric value. Don't fire for string value changes
      // (e.g. text editing) ATK values are always numeric.
      g_object_notify((GObject*)atkObj, "accessible-value");
    }
    break;

    case nsIAccessibleEvent::EVENT_SELECTION:
    case nsIAccessibleEvent::EVENT_SELECTION_ADD:
    case nsIAccessibleEvent::EVENT_SELECTION_REMOVE:
    {
      // XXX: dupe events may be fired
      AccSelChangeEvent* selChangeEvent = downcast_accEvent(aEvent);
      g_signal_emit_by_name(AccessibleWrap::GetAtkObject(selChangeEvent->Widget()),
                            "selection_changed");
      break;
    }

    case nsIAccessibleEvent::EVENT_SELECTION_WITHIN:
    {
      g_signal_emit_by_name(atkObj, "selection_changed");
      break;
    }

    case nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED:
        g_signal_emit_by_name(atkObj, "text_selection_changed");
        break;

    case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED:
      {
        AccCaretMoveEvent* caretMoveEvent = downcast_accEvent(aEvent);
        NS_ASSERTION(caretMoveEvent, "Event needs event data");
        if (!caretMoveEvent)
            break;

        int32_t caretOffset = caretMoveEvent->GetCaretOffset();
        g_signal_emit_by_name(atkObj, "text_caret_moved", caretOffset);
      } break;

    case nsIAccessibleEvent::EVENT_TEXT_ATTRIBUTE_CHANGED:
        g_signal_emit_by_name(atkObj, "text-attributes-changed");
        break;

    case nsIAccessibleEvent::EVENT_TABLE_MODEL_CHANGED:
        g_signal_emit_by_name(atkObj, "model_changed");
        break;

    case nsIAccessibleEvent::EVENT_TABLE_ROW_INSERT:
      {
        AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
        NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);

        int32_t rowIndex = tableEvent->GetIndex();
        int32_t numRows = tableEvent->GetCount();

        g_signal_emit_by_name(atkObj, "row_inserted", rowIndex, numRows);
     } break;

   case nsIAccessibleEvent::EVENT_TABLE_ROW_DELETE:
     {
        AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
        NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);

        int32_t rowIndex = tableEvent->GetIndex();
        int32_t numRows = tableEvent->GetCount();

        g_signal_emit_by_name(atkObj, "row_deleted", rowIndex, numRows);
      } break;

    case nsIAccessibleEvent::EVENT_TABLE_ROW_REORDER:
      {
        g_signal_emit_by_name(atkObj, "row_reordered");
        break;
      }

    case nsIAccessibleEvent::EVENT_TABLE_COLUMN_INSERT:
      {
        AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
        NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);

        int32_t colIndex = tableEvent->GetIndex();
        int32_t numCols = tableEvent->GetCount();
        g_signal_emit_by_name(atkObj, "column_inserted", colIndex, numCols);
      } break;

    case nsIAccessibleEvent::EVENT_TABLE_COLUMN_DELETE:
      {
        AccTableChangeEvent* tableEvent = downcast_accEvent(aEvent);
        NS_ENSURE_TRUE(tableEvent, NS_ERROR_FAILURE);

        int32_t colIndex = tableEvent->GetIndex();
        int32_t numCols = tableEvent->GetCount();
        g_signal_emit_by_name(atkObj, "column_deleted", colIndex, numCols);
      } break;

    case nsIAccessibleEvent::EVENT_TABLE_COLUMN_REORDER:
        g_signal_emit_by_name(atkObj, "column_reordered");
        break;

    case nsIAccessibleEvent::EVENT_SECTION_CHANGED:
        g_signal_emit_by_name(atkObj, "visible_data_changed");
        break;

    case nsIAccessibleEvent::EVENT_SHOW:
        return FireAtkShowHideEvent(aEvent, atkObj, true);

    case nsIAccessibleEvent::EVENT_HIDE:
        // XXX - Handle native dialog accessibles.
        if (!accessible->IsRoot() && accessible->HasARIARole() &&
            accessible->ARIARole() == roles::DIALOG) {
          guint id = g_signal_lookup("deactivate", MAI_TYPE_ATK_OBJECT);
          g_signal_emit(atkObj, id, 0);
        }
        return FireAtkShowHideEvent(aEvent, atkObj, false);

        /*
         * Because dealing with menu is very different between nsIAccessible
         * and ATK, and the menu activity is important, specially transfer the
         * following two event.
         * Need more verification by AT test.
         */
    case nsIAccessibleEvent::EVENT_MENU_START:
    case nsIAccessibleEvent::EVENT_MENU_END:
        break;

    case nsIAccessibleEvent::EVENT_WINDOW_ACTIVATE:
      {
        accessible->AsRoot()->mActivated = true;
        guint id = g_signal_lookup("activate", MAI_TYPE_ATK_OBJECT);
        g_signal_emit(atkObj, id, 0);

        // Always fire a current focus event after activation.
        FocusMgr()->ForceFocusEvent();
      } break;

    case nsIAccessibleEvent::EVENT_WINDOW_DEACTIVATE:
      {
        accessible->AsRoot()->mActivated = false;
        guint id = g_signal_lookup("deactivate", MAI_TYPE_ATK_OBJECT);
        g_signal_emit(atkObj, id, 0);
      } break;

    case nsIAccessibleEvent::EVENT_WINDOW_MAXIMIZE:
      {
        guint id = g_signal_lookup("maximize", MAI_TYPE_ATK_OBJECT);
        g_signal_emit(atkObj, id, 0);
      } break;

    case nsIAccessibleEvent::EVENT_WINDOW_MINIMIZE:
      {
        guint id = g_signal_lookup("minimize", MAI_TYPE_ATK_OBJECT);
        g_signal_emit(atkObj, id, 0);
      } break;

    case nsIAccessibleEvent::EVENT_WINDOW_RESTORE:
      {
        guint id = g_signal_lookup("restore", MAI_TYPE_ATK_OBJECT);
        g_signal_emit(atkObj, id, 0);
      } break;

    case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE:
        g_signal_emit_by_name (atkObj, "load_complete");
        // XXX - Handle native dialog accessibles.
        if (!accessible->IsRoot() && accessible->HasARIARole() &&
            accessible->ARIARole() == roles::DIALOG) {
          guint id = g_signal_lookup("activate", MAI_TYPE_ATK_OBJECT);
          g_signal_emit(atkObj, id, 0);
        }
      break;

    case nsIAccessibleEvent::EVENT_DOCUMENT_RELOAD:
        g_signal_emit_by_name (atkObj, "reload");
      break;

    case nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_STOPPED:
        g_signal_emit_by_name (atkObj, "load_stopped");
      break;

    case nsIAccessibleEvent::EVENT_MENUPOPUP_START:
        atk_focus_tracker_notify(atkObj); // fire extra focus event
        atk_object_notify_state_change(atkObj, ATK_STATE_VISIBLE, true);
        atk_object_notify_state_change(atkObj, ATK_STATE_SHOWING, true);
        break;

    case nsIAccessibleEvent::EVENT_MENUPOPUP_END:
        atk_object_notify_state_change(atkObj, ATK_STATE_VISIBLE, false);
        atk_object_notify_state_change(atkObj, ATK_STATE_SHOWING, false);
        break;
    }

    return NS_OK;
}