tdf#84102: Expose XAccessibleExtendedAttributes through ATK

Those attributes contain a lot of interesting properties, among them
the heading level which fixes this bug.

Change-Id: I634ef404123cb1b2831563b9b186db4b7e9e7d8b

vcl/unx/gtk/a11y/atktextattributes.cxx

@@ -1211,6 +1211,37 @@ attribute_set_new_from_property_values(
     return attribute_set;
 }
 
+AtkAttributeSet*
+attribute_set_new_from_extended_attributes(
+    const css::uno::Reference< css::accessibility::XAccessibleExtendedAttributes >& rExtendedAttributes )
+{
+    AtkAttributeSet *pSet = NULL;
+
+    // extended attributes is a string of colon-separated pairs of property and value,
+    // with pairs separated by semicolons. Example: "heading-level:2;weight:bold;"
+    uno::Any anyVal = rExtendedAttributes->getExtendedAttributes();
+    OUString sExtendedAttrs;
+    anyVal >>= sExtendedAttrs;
+    sal_Int32 nIndex = 0;
+    do
+    {
+        OUString sProperty = sExtendedAttrs.getToken( 0, ';', nIndex );
+
+        sal_Int32 nColonPos = 0;
+        OString sPropertyName = OUStringToOString( sProperty.getToken( 0, ':', nColonPos ),
+                                                   RTL_TEXTENCODING_UTF8 );
+        OString sPropertyValue = OUStringToOString( sProperty.getToken( 0, ':', nColonPos ),
+                                                    RTL_TEXTENCODING_UTF8 );
+
+        pSet = attribute_set_prepend( pSet,
+                                      atk_text_attribute_register( sPropertyName.getStr() ),
+                                      g_strdup_printf( sPropertyValue.getStr() ) );
+    }
+    while ( nIndex >= 0 && nIndex < sExtendedAttrs.getLength() );
+
+    return pSet;
+}
+
 AtkAttributeSet* attribute_set_prepend_misspelled( AtkAttributeSet* attribute_set )
 {
     if( ATK_TEXT_ATTR_INVALID == atk_text_attribute_misspelled )

vcl/unx/gtk/a11y/atktextattributes.hxx

@@ -22,6 +22,7 @@
 
 #include <com/sun/star/uno/Sequence.hxx>
 #include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/accessibility/XAccessibleExtendedAttributes.hpp>
 
 #include <atk/atk.h>
 
@@ -31,6 +32,10 @@ attribute_set_new_from_property_values(
     bool run_attributes_only,
     AtkText *text);
 
+AtkAttributeSet*
+attribute_set_new_from_extended_attributes(
+    const css::uno::Reference< css::accessibility::XAccessibleExtendedAttributes >& rExtendedAttributes );
+
 bool
 attribute_set_map_to_property_values(
     AtkAttributeSet* attribute_set,

vcl/unx/gtk/a11y/atkwrapper.cxx

@@ -38,6 +38,7 @@
 #include <com/sun/star/accessibility/XAccessibleRelationSet.hpp>
 #include <com/sun/star/accessibility/XAccessibleTable.hpp>
 #include <com/sun/star/accessibility/XAccessibleEditableText.hpp>
+#include <com/sun/star/accessibility/XAccessibleExtendedAttributes.hpp>
 #include <com/sun/star/accessibility/XAccessibleImage.hpp>
 #include <com/sun/star/accessibility/XAccessibleHyperlink.hpp>
 #include <com/sun/star/accessibility/XAccessibleHypertext.hpp>
@@ -62,6 +63,7 @@
 #include "atkwrapper.hxx"
 #include "atkregistry.hxx"
 #include "atklistener.hxx"
+#include "atktextattributes.hxx"
 
 #ifdef ENABLE_TRACING
 #include <stdio.h>
@@ -395,6 +397,33 @@ wrapper_get_description( AtkObject *atk_obj )
 
 /*****************************************************************************/
 
+static AtkAttributeSet *
+wrapper_get_attributes( AtkObject *atk_obj )
+{
+    AtkObjectWrapper *obj = ATK_OBJECT_WRAPPER( atk_obj );
+    AtkAttributeSet *pSet = NULL;
+
+    if( obj->mpContext )
+    {
+        uno::Reference< accessibility::XAccessibleContext > xContext( obj->mpContext );
+        try
+        {
+            uno::Reference< accessibility::XAccessibleExtendedAttributes > xExtendedAttrs( xContext,
+                                                                                           uno::UNO_QUERY );
+            if( xExtendedAttrs.is() )
+                pSet = attribute_set_new_from_extended_attributes( xExtendedAttrs );
+        }
+        catch(const uno::Exception&)
+        {
+            g_warning( "Exception in getAccessibleAttributes()" );
+        }
+    }
+
+    return pSet;
+}
+
+/*****************************************************************************/
+
 static gint
 wrapper_get_n_children( AtkObject *atk_obj )
 {
@@ -601,6 +630,7 @@ atk_object_wrapper_class_init (AtkObjectWrapperClass *klass)
   // AtkObject methods
   atk_class->get_name = wrapper_get_name;
   atk_class->get_description = wrapper_get_description;
+  atk_class->get_attributes = wrapper_get_attributes;
   atk_class->get_n_children = wrapper_get_n_children;
   atk_class->ref_child = wrapper_ref_child;
   atk_class->get_index_in_parent = wrapper_get_index_in_parent;