forked from amazingfate/loongoffice
With 16k column support in Calc enabled by default in
commit 4c5f8ccf0a2320432b8fe91add1dcadf54d9fd58
Date: Tue Mar 8 12:44:49 2022 +0100
change default Calc number of columns to 16384 (tdf#50916)
, the number of Calc cells in a spreadsheet is larger than
SAL_MAX_INT32, meaning that a 32-bit a11y child index is no more
enough and using it resulted in integer overflows in
methods handling corresponding Calc cells in the a11y layer.
This e.g. had the effect of the Orca and NVDA screen readers
not announcing focused or selected cells properly when their
a11y child index was out of the 32-bit integer range.
Switch the internal a11y child indices to 64 bit to
be able to handle this properly internally.
Since the platform APIs (at least AT-SPI on Linux and
IAccessible2 on Windows; from what I can see LO's macOS
a11y bridge doesn't directly expose the child index)
are still restricted to 32 bit, larger child indices
still cannot be exposed via the platform APIs.
As a consequence, use of the the IAccessible2 and
AT-SPI methods that use the child index remains
problematic in those cases where the child index
is larger. However, as an alternative to using the
AT-SPI Table interface and the IAccessibleTable/
IAccessibleTable2 interfaces with the child index
to retrieve information about a specific cell,
both AT-SPI and IAccessible2 also provide interfaces
to retrieve that information directly
from the cell object (TableCell interface for AT-SPI,
IAccessibleTableCell for IAccessible2).
Those interfaces are already implemented/exposed
for winaccessibility (s. `CAccTable`) and the
qt5/qt6/kf5 VCL plugins (s. the `QAccessibleTableCellInterface`
methods implemented in `QtAccessibleInterface`).
With the switch to 64-bit internal a11y child indices,
these now behave correctly for cells with a child
index that doesn't fit into 32 bit as well.
NVDA on Windows already uses the IAccessibleTableCell
interface and thus announcing focused cells works fine
with this change in place.
Orca on Linux currently doesn't make use of the AT-SPI
TableCell interface yet, but with a suggested change to
do so [1], announcement of selected cells works
with the qt6 VCL plugin with a current qtbase dev branch
as well - when combined with the suggested changes
to implement support for the AT-SPI TableCell interface
in Qt [2] [3] and the LO change based on that [4] and
a fix for a nullptr dereference [5].
The gtk3 VCL plugin doesn't expose the AT-SPI
TableCell interface yet, but once it does so
(via `AtkTableCell`), it also works with the
suggested Orca change [1] in place.
(Adding that is planned for an upcoming change,
works with a local WIP patch.)
For handling return values that are larger than what
platform APIs support, the following approach has
been chosen for now:
1) When the return value is for the count of
(selected) children, the maximum value N
supported by the platform API is returned.
(This is what `ScAccessibleTableBase::getAccessibleChildCount`
did previously.)
The first N elements can be accessed by their
actual (selection) indices.
2) When the return value is the child/cell index,
-2 is returned for objects whose index is greater
than the maximum value supported by the platform
API.
Using a non-negative value would mean that the
index would refer to *another* actually existing
child. A child index of -1 on the other hand
tends to be interpreted as "child is invalid" or
"object isn't actually a child of its (previous)
parent any more)". For the Orca case, this would
result in objects with a child index of -1
not being announced, as they are considered
"zombies" [6].
What's still somewhat problematic is the case where
more than 2^31 children are *selected*, since access
to those children still happens by the index into
the selection in the platform APIs, and not all
selected items are accessible this way.
(Screen readers usually just retrieve
the first and last element from the selection and
announce those.)
Orca already seems to apply different handling for the
case for fully selected rows and columns, so
"All cells selected" or "Columns ... to ... selected"
is announced just fine even if more than 2^31
cells are selected.
(Side note: While Microsoft User Interface
Automation - UIA - also uses 32-bit indices, it also
has specific methods in the ISelectionProvider2
interface that allow to explicitly retrieve the
first and last selected item,
`ISelectionProvider2::get_FirstSelectedItem` and
`ISelectionProvider2::get_LastSelectedItem`, but
we currently don't support UIA on Windows.)
Bound checks at the beginning of the methods from the
`XAccessibleContext`, `XAccessibleSelection` and
`XAccessibleTable` interfaces that take a child index
(or in helper methods called by those) should generally
already prevent too large indices from being passed to
the methods in the lower layer code that take smaller
integer types. Such bound checking has been
been added in various places where it wasn't present yet.
If there any remaining issues of this
kind that show after this commit, they can probably be
solved in a similar way (s.e.g. the change to
`AccessibleBrowseBox::getAccessibleChild` in this
commit).
A few asserts were also added at
places where my understanding is that values shouldn't
be larger than what is supported by a called method
anyway.
A test case will be added in a following change.
[1] https://gitlab.gnome.org/GNOME/orca/-/merge_requests/131
[2] https://codereview.qt-project.org/c/qt/qtbase/+/428566
[3] https://codereview.qt-project.org/c/qt/qtbase/+/428567
[4] https://gerrit.libreoffice.org/c/core/+/138750
[5] https://codereview.qt-project.org/c/qt/qtbase/+/430157
[6] 82c8542002/src/orca/script_utilities.py (L5155)
Change-Id: I3af590c988b0e6754fc72545918412f39e8fea07
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/139258
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
587 lines
21 KiB
Java
587 lines
21 KiB
Java
/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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package ifc.accessibility;
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import com.sun.star.accessibility.AccessibleRole;
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import com.sun.star.accessibility.XAccessible;
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import com.sun.star.accessibility.XAccessibleContext;
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import com.sun.star.accessibility.XAccessibleSelection;
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import com.sun.star.uno.UnoRuntime;
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import lib.MultiMethodTest;
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import lib.Status;
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import lib.StatusException;
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/**
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* Testing <code>com.sun.star.accessibility.XAccessibleSelection</code>
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* interface methods :
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* <ul>
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* <li><code>selectAccessibleChild()</code></li>
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* <li><code>isAccessibleChildSelected()</code></li>
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* <li><code>clearAccessibleSelection()</code></li>
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* <li><code>selectAllAccessibleChildren()</code></li>
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* <li><code>getSelectedAccessibleChildCount()</code></li>
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* <li><code>getSelectedAccessibleChild()</code></li>
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* <li><code>deselectAccessibleChild()</code></li>
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* </ul> <p>
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*
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* This test needs the following object relations :
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* <ul>
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* <li> <code>'XAccessibleSelection.multiSelection'</code>
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* (of type <code>Boolean</code>) <b> optional </b>:
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* Indicates whether or not multiply children could be selected.
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* If the relation is <code>false</code> then more than 1 child
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* couldn't be selected. </li>
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* </ul> <p>
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*
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* @see com.sun.star.accessibility.XAccessibleSelection
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*/
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public class _XAccessibleSelection extends MultiMethodTest {
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private static final String className = "com.sun.star.accessibility.XAccessibleSelection";
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public XAccessibleSelection oObj = null;
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XAccessibleContext xAC = null;
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long childCount;
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protected boolean multiSelection = true;
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protected boolean OneAlwaysSelected = false;
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// temporary while accessibility package is in com.sun.star
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@Override
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protected String getTestedClassName() {
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return className;
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}
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/**
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* Retrieves the interface <code>XAccessibleContext</code>
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* and object relation.
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* @see com.sun.star.accessibility.XAccessibleContext
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* @see ifc.accessibility._XAccessibleContext
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*/
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@Override
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protected void before() {
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xAC = UnoRuntime.queryInterface(
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XAccessibleContext.class, oObj);
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if (xAC == null) {
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throw new StatusException(Status.failed(
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"Couldn't query XAccessibleContext. Test must be modified"));
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}
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Boolean b = (Boolean) tEnv.getObjRelation(
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"XAccessibleSelection.multiSelection");
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if (b != null) {
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multiSelection = b.booleanValue();
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}
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Boolean b2 = (Boolean) tEnv.getObjRelation(
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"XAccessibleSelection.OneAlwaysSelected");
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if (b2 != null) {
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OneAlwaysSelected = b2.booleanValue();
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}
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childCount = xAC.getAccessibleChildCount();
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log.println("Child count: " + childCount);
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}
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/**
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* Selects accessible child with index some wrong indexes
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* and with legal index.
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* Has OK status if exception was thrown for wrong indexes
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* and if exception wasn't thrown for correct index.
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*/
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public void _selectAccessibleChild() {
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boolean res = true;
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try {
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log.println("Try to select child with index " + childCount);
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oObj.selectAccessibleChild(childCount);
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log.println("Exception was expected");
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res = false;
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Expected exception");
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res = true;
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}
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try {
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log.println("Try to select child with index -1");
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oObj.selectAccessibleChild(-1);
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log.println("Exception was expected");
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res = false;
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Expected exception");
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res &= true;
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}
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log.println("ChildCount: " + childCount);
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long usedChildren = childCount;
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if (childCount > 500) {
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log.println("Restricting to 500");
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usedChildren = 500;
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}
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if (usedChildren > 0) {
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try {
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for (long i = 0; i < usedChildren; i++) {
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log.print("Trying to select child with index " + i + ": ");
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if (isSelectable(tEnv.getTestObject(), i)) {
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oObj.selectAccessibleChild(i);
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log.println("OK");
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} else {
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log.println("Child isn't selectable");
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}
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}
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res &= true;
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Unexpected exception");
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e.printStackTrace(log);
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res = false;
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}
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}
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tRes.tested("selectAccessibleChild()", res);
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}
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/**
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* Calls the method with the wrong index and with the correct index.
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* Has OK status if exception was thrown for wrong index and
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* if exception wasn't thrown for the correct index.
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*/
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public void _isAccessibleChildSelected() throws Exception {
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executeMethod("selectAccessibleChild()");
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boolean res = true;
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boolean isSelected = false;
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try {
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log.print("isAccessibleChildSelected(-1)? ");
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isSelected = oObj.isAccessibleChildSelected(-1);
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log.println(res);
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log.println("Exception was expected");
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res = false;
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Expected exception");
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res = true;
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}
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try {
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log.print("isAccessibleChildSelected(" + childCount + ")? ");
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isSelected = oObj.isAccessibleChildSelected(childCount);
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log.println(isSelected);
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log.println("Exception was expected");
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res = false;
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Expected exception");
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res &= true;
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}
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long SelectableChildCount = chkSelectable(tEnv.getTestObject());
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if (SelectableChildCount > 500) {
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SelectableChildCount = 500;
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}
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log.println("SelectableChildCount: " + SelectableChildCount);
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if (SelectableChildCount > 0) {
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try {
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oObj.selectAllAccessibleChildren();
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for (long k = 0; k < SelectableChildCount; k++) {
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log.println("Trying to select child with index " + k);
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if (isSelectable(tEnv.getTestObject(), k)) {
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oObj.selectAccessibleChild(k);
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waitForEventIdle();
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isSelected = oObj.isAccessibleChildSelected(k);
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log.println("isAccessibleChildSelected - " +
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isSelected);
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res &= isSelected;
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} else {
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log.println("Child isn't selectable");
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}
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}
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Unexpected exception");
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e.printStackTrace(log);
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res = false;
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}
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}
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tRes.tested("isAccessibleChildSelected()", res);
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}
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/**
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* Calls the method.
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* Has OK status if the method <code>isAccessibleChildSelected()</code>
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* returned <code>false</code>.
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*/
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public void _clearAccessibleSelection() throws Exception {
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executeMethod("isAccessibleChildSelected()");
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boolean res = true;
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log.println("clearAccessibleSelection");
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oObj.clearAccessibleSelection();
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// clearAccessibleSelection() call is oneway so we need
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// some waiting
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waitForEventIdle();
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if ((childCount > 0) && !OneAlwaysSelected) {
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try {
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log.print("isAccessibleChildSelected(" + (childCount - 1) +
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")? ");
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boolean isSel = oObj.isAccessibleChildSelected(childCount - 1);
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log.println(isSel);
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res = !isSel;
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Unexpected exception");
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e.printStackTrace(log);
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res = false;
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}
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} else if (OneAlwaysSelected) {
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log.println("Can't clear selection, one child is always selected");
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}
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tRes.tested("clearAccessibleSelection()", res);
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}
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/**
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* Calls the method.
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* Has OK status if the method <code>isAccessibleChildSelected()</code>
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* returns <code>true</code> for first and for last accessible child
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* or if multiselection is not allowed.
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*/
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public void _selectAllAccessibleChildren() {
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executeMethod("clearAccessibleSelection()");
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log.println("selectAllAccessibleChildren...");
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oObj.selectAllAccessibleChildren();
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// selectAllAccessibleChildren() call is oneway so we need
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// some waiting
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waitForEventIdle();
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boolean res = true;
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boolean isSelected = true;
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long SelectableChildCount = chkSelectable(tEnv.getTestObject());
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if ((SelectableChildCount > 0) && multiSelection) {
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try {
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log.print("isAccessibleChildSelected(1)? ");
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isSelected = oObj.isAccessibleChildSelected(1);
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log.println(isSelected);
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res = isSelected;
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log.print("isAccessibleChildSelected(" + (childCount - 1) +
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")? ");
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isSelected = oObj.isAccessibleChildSelected(childCount - 1);
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log.println(isSelected);
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res &= isSelected;
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Unexpected exception");
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e.printStackTrace(log);
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res = false;
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}
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}
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tRes.tested("selectAllAccessibleChildren()", res);
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}
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/**
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* Calls the method. Clears accessible selection and calls the method again.
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* <p>
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* Has OK status if the method returns number equal to number of accessible
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* child count after first call if multiselection allowed, or
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* 1 returned if multiselection not allowed.
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* And if the method returns a zero after clearing selection.
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*/
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public void _getSelectedAccessibleChildCount() {
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log.println("getSelectedAccessibleChildCount():");
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if (multiSelection) {
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oObj.selectAllAccessibleChildren();
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} else {
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long usedChildren = childCount;
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if (childCount > 500) {
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log.println("Restricting to 500");
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usedChildren = 500;
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}
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if (usedChildren > 0) {
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try {
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for (long i = 0; i < usedChildren; i++) {
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if (isSelectable(tEnv.getTestObject(), i)) {
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log.print("Trying to select child with index "+i+": ");
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oObj.selectAccessibleChild(i);
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long curtime = System.currentTimeMillis();
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long checktime = System.currentTimeMillis();
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while (!oObj.isAccessibleChildSelected(i) && (checktime-curtime<5000)) {
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checktime = System.currentTimeMillis();
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}
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log.println("OK");
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}
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}
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Unexpected exception");
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e.printStackTrace(log);
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}
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}
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}
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long sCount = chkSelectable(tEnv.getTestObject());
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log.println("Found " + sCount + " selectable Children");
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long selectedCount = oObj.getSelectedAccessibleChildCount();
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log.println("After selecting all accessible " + selectedCount +
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" are selected");
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boolean res = true;
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if (multiSelection) {
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res &= (selectedCount == sCount);
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} else {
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res &= (selectedCount == 1);
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}
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log.println("clearAccessibleSelection...");
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oObj.clearAccessibleSelection();
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log.print("getSelectedAccessibleChildCount: ");
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selectedCount = oObj.getSelectedAccessibleChildCount();
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log.println(selectedCount);
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if (OneAlwaysSelected) {
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res &= (selectedCount == 1);
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} else {
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res &= (selectedCount == 0);
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}
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tRes.tested("getSelectedAccessibleChildCount()", res);
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}
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/**
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* Calls the method with wrong and correct indexes.
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* Has OK status if exception was thrown for the wrong indexes,
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* if exception wasn't thrown for the correct index and
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* if the method have returned a not null for the correct index.
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*/
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public void _getSelectedAccessibleChild() throws Exception {
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executeMethod("getSelectedAccessibleChildCount()");
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boolean res = true;
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long selectedCount = oObj.getSelectedAccessibleChildCount();
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log.println("getSelectedAccessibleChildCount: " + selectedCount);
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try {
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log.println("getSelectedAccessibleChild(-1)");
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oObj.getSelectedAccessibleChild(-1);
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log.println("Exception was expected");
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res = false;
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Expected exception");
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res = true;
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}
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try {
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log.println("getSelectedAccessibleChild(" + selectedCount + ")");
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oObj.getSelectedAccessibleChild(selectedCount);
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log.println("Exception was expected");
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res &= false;
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} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
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log.println("Expected exception");
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res &= true;
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}
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long SelectableChildCount = chkSelectable(tEnv.getTestObject());
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if (SelectableChildCount > 500) {
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SelectableChildCount = 500;
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}
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if (SelectableChildCount > 0) {
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long k = 0;
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try {
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for (k = 0; k < SelectableChildCount; k++) {
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log.println("Trying to select child with index " + k);
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if (isSelectable(tEnv.getTestObject(), k)) {
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oObj.selectAccessibleChild(k);
|
|
waitForEventIdle();
|
|
log.println("selected child count: " +
|
|
oObj.getSelectedAccessibleChildCount());
|
|
XAccessible selChild = oObj.getSelectedAccessibleChild(0);
|
|
res &= (selChild != null);
|
|
log.println("valid child - " + (selChild != null));
|
|
} else {
|
|
log.println("Child isn't selectable");
|
|
}
|
|
}
|
|
} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
|
|
log.println("Unexpected exception: Last relevant calls:\n " +
|
|
"\toObj.selectAccessibleChild("+k+")\n" +
|
|
"\toObj.getSelectedAccessibleChild(0)");
|
|
e.printStackTrace(log);
|
|
res = false;
|
|
}
|
|
}
|
|
|
|
tRes.tested("getSelectedAccessibleChild()", res);
|
|
}
|
|
|
|
/**
|
|
* Calls the method with wrong and with correct indexes.
|
|
* Has OK status if exceptions were thrown for the calls with
|
|
* the wrong indexes, if exception wasn't thrown for the call
|
|
* with correct index and if number of selected child was
|
|
* decreased after the correct call.
|
|
*/
|
|
public void _deselectAccessibleChild() {
|
|
executeMethod("getSelectedAccessibleChild()");
|
|
|
|
boolean res = true;
|
|
long selCount = oObj.getSelectedAccessibleChildCount();
|
|
log.println("getSelectedAccessibleChildCount():" + selCount);
|
|
|
|
try {
|
|
log.println("deselectAccessibleChild(-1)");
|
|
oObj.deselectAccessibleChild(-1);
|
|
log.println("Exception was expected");
|
|
res = false;
|
|
} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
|
|
log.println("Expected exception");
|
|
res &= true;
|
|
}
|
|
|
|
try {
|
|
log.println("deselectAccessibleChild(" + (childCount + 1) + ")");
|
|
oObj.deselectAccessibleChild(childCount + 1);
|
|
log.println("Exception was expected");
|
|
res = false;
|
|
} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
|
|
log.println("Expected exception");
|
|
res &= true;
|
|
}
|
|
|
|
log.println("#################");
|
|
log.println("Selecting all accessible");
|
|
oObj.selectAllAccessibleChildren();
|
|
selCount = oObj.getSelectedAccessibleChildCount();
|
|
log.println("getSelectedAccessibleChildCount():" + selCount);
|
|
|
|
if ((childCount > 0) && (selCount > 0)) {
|
|
try {
|
|
long maxCount = chkSelectable(tEnv.getTestObject());
|
|
|
|
if (childCount > 100) {
|
|
maxCount = 100;
|
|
}
|
|
|
|
for (long k = 0; k < maxCount; k++) {
|
|
log.println("deselectAccessibleChild(" + k + ")");
|
|
|
|
if (oObj.isAccessibleChildSelected(k)) {
|
|
oObj.deselectAccessibleChild(k);
|
|
}
|
|
}
|
|
|
|
long newSelCount = oObj.getSelectedAccessibleChildCount();
|
|
log.println("getSelectedAccessibleChildCount():" +
|
|
newSelCount);
|
|
|
|
if (OneAlwaysSelected && (selCount == 1)) {
|
|
log.println("One Child is always selected");
|
|
res &= true;
|
|
} else {
|
|
res &= (selCount > newSelCount);
|
|
}
|
|
} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
|
|
log.println("Unexpected exception");
|
|
e.printStackTrace(log);
|
|
res = false;
|
|
}
|
|
}
|
|
|
|
tRes.tested("deselectAccessibleChild()", res);
|
|
}
|
|
|
|
protected static long chkSelectable(Object Testcase) {
|
|
long ret = 0;
|
|
XAccessibleContext accCon = UnoRuntime.queryInterface(
|
|
XAccessibleContext.class, Testcase);
|
|
long cc = accCon.getAccessibleChildCount();
|
|
|
|
if (cc > 500) {
|
|
return cc;
|
|
}
|
|
|
|
for (long i = 0; i < cc; i++) {
|
|
try {
|
|
if ((accCon.getAccessibleChild(i).getAccessibleContext()
|
|
.getAccessibleStateSet()
|
|
& com.sun.star.accessibility.AccessibleStateType.SELECTABLE) != 0) {
|
|
ret = ret + 1;
|
|
System.out.println("Child " + i + " is selectable");
|
|
}
|
|
} catch (com.sun.star.lang.IndexOutOfBoundsException iab) {
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
protected static boolean isSelectable(Object Testcase, long index) {
|
|
XAccessibleContext accCon = UnoRuntime.queryInterface(
|
|
XAccessibleContext.class, Testcase);
|
|
boolean res = false;
|
|
|
|
try {
|
|
if ((accCon.getAccessibleChild(index).getAccessibleContext()
|
|
.getAccessibleStateSet()
|
|
& com.sun.star.accessibility.AccessibleStateType.SELECTABLE) != 0) {
|
|
res = true;
|
|
}
|
|
|
|
//selecting menuitems or the separator will lead to closing the menu
|
|
if ((accCon.getAccessibleChild(index).getAccessibleContext()
|
|
.getAccessibleRole() == AccessibleRole.MENU_ITEM) ||
|
|
(accCon.getAccessibleChild(index).getAccessibleContext()
|
|
.getAccessibleRole() == AccessibleRole.SEPARATOR)) {
|
|
res = false;
|
|
}
|
|
} catch (com.sun.star.lang.IndexOutOfBoundsException e) {
|
|
System.out.println("Exception while checking for selectability");
|
|
}
|
|
|
|
return res;
|
|
}
|
|
}
|