tdf#108642 load accessibility children faster

Reduces the cost of repeatedly iterating over the page objects, by
adding a new XAccessibleContext3 interface to return accesibility
children in one call.

This takes the load time from 5.6s to 3.2s.

Change-Id: Ifcc20fa7e7ab8ad50417073882c8c3a2405d1eaa
Reviewed-on: https://gerrit.libreoffice.org/83850
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

2 files changed, 47 insertions, 0 deletions

diff --git a/sw/source/core/access/acccontext.cxx b/sw/source/core/access/acccontext.cxx
index d3bb318584b5..0e8d45f91a24 100644
--- a/sw/source/core/access/acccontext.cxx
+++ b/sw/source/core/access/acccontext.cxx
@@ -620,6 +620,48 @@ uno::Reference< XAccessible> SAL_CALL
     return xChild;
 }
 
+css::uno::Sequence<uno::Reference<XAccessible>> SAL_CALL
+    SwAccessibleContext::getAccessibleChildren()
+{
+    SolarMutexGuard aGuard;
+
+    ThrowIfDisposed();
+
+    std::list< sw::access::SwAccessibleChild > aChildren;
+    GetChildren( *GetMap(), aChildren );
+
+    std::vector<uno::Reference<XAccessible>> aRet;
+    aRet.reserve(aChildren.size());
+    for (const auto & rSwChild : aChildren)
+    {
+        uno::Reference< XAccessible > xChild;
+        if( rSwChild.GetSwFrame() )
+        {
+            ::rtl::Reference < SwAccessibleContext > xChildImpl(
+                    GetMap()->GetContextImpl( rSwChild.GetSwFrame(), !m_isDisposing )  );
+            if( xChildImpl.is() )
+            {
+                xChildImpl->SetParent( this );
+                xChild = xChildImpl.get();
+            }
+        }
+        else if ( rSwChild.GetDrawObject() )
+        {
+            ::rtl::Reference < ::accessibility::AccessibleShape > xChildImpl(
+                    GetMap()->GetContextImpl( rSwChild.GetDrawObject(),
+                                              this, !m_isDisposing) );
+            if( xChildImpl.is() )
+                xChild = xChildImpl.get();
+        }
+        else if ( rSwChild.GetWindow() )
+        {
+            xChild = rSwChild.GetWindow()->GetAccessible();
+        }
+        aRet.push_back(xChild);
+    }
+    return comphelper::containerToSequence(aRet);
+}
+
 uno::Reference< XAccessible> SwAccessibleContext::getAccessibleParentImpl()
 {
     SolarMutexGuard aGuard;
diff --git a/sw/source/core/access/acccontext.hxx b/sw/source/core/access/acccontext.hxx
index 52dfe42827d9..ddbc019b2e6a 100644
--- a/sw/source/core/access/acccontext.hxx
+++ b/sw/source/core/access/acccontext.hxx
@@ -23,6 +23,7 @@
 #include "accframe.hxx"
 #include <accmap.hxx>
 #include <com/sun/star/accessibility/XAccessibleComponent.hpp>
+#include <com/sun/star/accessibility/XAccessibleContext3.hpp>
 #include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
 #include <com/sun/star/lang/XServiceInfo.hpp>
 #include <cppuhelper/implbase.hxx>
@@ -46,6 +47,7 @@ class SwAccessibleContext :
     public ::cppu::WeakImplHelper<
                 css::accessibility::XAccessible,
                 css::accessibility::XAccessibleContext,
+                css::accessibility::XAccessibleContext3,
                 css::accessibility::XAccessibleComponent,
                 css::accessibility::XAccessibleEventBroadcaster,
                 css::lang::XServiceInfo
@@ -220,6 +222,9 @@ public:
     virtual css::uno::Reference< css::accessibility::XAccessible> SAL_CALL
         getAccessibleChild (sal_Int32 nIndex) override;
 
+    virtual css::uno::Sequence<css::uno::Reference< css::accessibility::XAccessible>> SAL_CALL
+        getAccessibleChildren() override;
+
     // Return a reference to the parent.
     virtual css::uno::Reference< css::accessibility::XAccessible> SAL_CALL
         getAccessibleParent() override;