tdf#135586 a11y: Add a new BLOCK_QUOTE a11y role

A block quote role exists in all of WAI-ARIA 1.3
(role "blockquote", [1]), IAccessible2
(`IA2_ROLE_BLOCK_QUOTE`,  [2]) and AT-SPI
(`ROLE_BLOCK_QUOTE`, [3]).

Take over the definition that is the same in WAI-ARIA
and IAccessible2:

> A section of content that is quoted from another source.

The intended use for now is for a Writer paragraph using
the "Block Quotation" paragraph style, similar to how the
HEADING role is used for paragraphs using a corresponding
paragraph style.

For gtk3 (ATK) and winaccessibility (IAccessible2),
map the new role to the equivalant roles.

For macOS and the gtk4 as well as the Qt-based VCL plugins
on Linux which currently don't have an equivalent role,
fall back to the same role that the PARAGRAPH role is
mapped to.
This way, the behavior there will remain unchanged
once the BLOCK_QUOTE role is used for Writer paragraphs
with the corresponding style.

In general, treat BLOCK_QUOTE like PARAGRAPH
in code applying special handling for the PARAGRAPH
role.

[1] https://w3c.github.io/aria/#blockquote
[2] https://github.com/LinuxA11y/IAccessible2/blob/3d8c7f0b833453f761ded6b12d8be431507bfe0b/api/AccessibleRole.idl#L318
[3] https://gitlab.gnome.org/GNOME/at-spi2-core/-/blob/7cc4cee53ddbd22631fd110f0e5ce045dec2e411/xml/Accessible.xml#L615-616

Change-Id: I248c183a2e7ec5d6f0a89bf3cb4829bbd8588c77
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/158573
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/vcl/osx/a11yrolehelper.mm b/vcl/osx/a11yrolehelper.mm
index e95036dbebd9..a1cf62f327cc 100644
--- a/vcl/osx/a11yrolehelper.mm
+++ b/vcl/osx/a11yrolehelper.mm
@@ -46,6 +46,7 @@ using namespace ::com::sun::star::uno;
             
         MAP( AccessibleRole::UNKNOWN, NSAccessibilityUnknownRole );
         MAP( AccessibleRole::ALERT, NSAccessibilityUnknownRole ); // FIXME
+        MAP( AccessibleRole::BLOCK_QUOTE, NSAccessibilityTextAreaRole );
         MAP( AccessibleRole::COLUMN_HEADER, NSAccessibilityColumnRole );
         MAP( AccessibleRole::CANVAS, NSAccessibilityUnknownRole ); // FIXME
         MAP( AccessibleRole::CHECK_BOX, NSAccessibilityCheckBoxRole );
@@ -186,6 +187,7 @@ using namespace ::com::sun::star::uno;
 
         MAP( AccessibleRole::UNKNOWN, NSAccessibilityUnknownSubrole );
         MAP( AccessibleRole::ALERT, NSAccessibilitySystemDialogSubrole );
+        MAP( AccessibleRole::BLOCK_QUOTE, @"" );
         MAP( AccessibleRole::COLUMN_HEADER, @"" );
         MAP( AccessibleRole::CANVAS, @"" );
         MAP( AccessibleRole::CHECK_BOX, @"" );