Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 213 insertions, 0 deletions

diff --git a/forms/source/helper/windowstateguard.cxx b/forms/source/helper/windowstateguard.cxx
new file mode 100644
index 000000000..0202baa74
--- /dev/null
+++ b/forms/source/helper/windowstateguard.cxx
@@ -0,0 +1,213 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <windowstateguard.hxx>
+#include <frm_strings.hxx>
+
+#include <com/sun/star/awt/XWindowListener2.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <tools/diagnose_ex.h>
+
+
+namespace frm
+{
+
+
+    using ::com::sun::star::awt::XWindowListener2;
+    using ::com::sun::star::uno::Reference;
+    using ::com::sun::star::awt::XWindow2;
+    using ::com::sun::star::awt::WindowEvent;
+    using ::com::sun::star::uno::RuntimeException;
+    using ::com::sun::star::awt::XControlModel;
+    using ::com::sun::star::beans::XPropertySet;
+    using ::com::sun::star::lang::EventObject;
+    using ::com::sun::star::uno::UNO_QUERY;
+    using ::com::sun::star::uno::Exception;
+
+    typedef ::cppu::WeakImplHelper <   XWindowListener2
+                                    >   WindowStateGuard_Impl_Base;
+    class WindowStateGuard_Impl : public WindowStateGuard_Impl_Base
+    {
+    private:
+        ::osl::Mutex                m_aMutex;
+        Reference< XWindow2 >       m_xWindow;
+        Reference< XPropertySet >   m_xModelProps;
+
+    public:
+        /** constructs the instance
+            @param _rxWindow
+                the window at which to listen. Must not be <NULL/>.
+            @param _rxModel
+                the model which acts as the reference for the states to be enforced. Must not be <NULL/>.
+        */
+        WindowStateGuard_Impl( const Reference< XWindow2 >& _rxWindow, const Reference< XPropertySet >& _rxMdelProps );
+
+        void dispose();
+
+    protected:
+        // XWindowListener2
+        virtual void SAL_CALL windowEnabled( const css::lang::EventObject& e ) override;
+        virtual void SAL_CALL windowDisabled( const css::lang::EventObject& e ) override;
+
+        // XWindowListener
+        virtual void SAL_CALL windowResized( const css::awt::WindowEvent& e ) override;
+        virtual void SAL_CALL windowMoved( const css::awt::WindowEvent& e ) override;
+        virtual void SAL_CALL windowShown( const css::lang::EventObject& e ) override;
+        virtual void SAL_CALL windowHidden( const css::lang::EventObject& e ) override;
+
+        // XEventListener
+        virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+    private:
+        /** ensures that the window's Enabled state matches what is described at the model
+            @precond
+                our mutex is locked
+        */
+        void    impl_ensureEnabledState_nothrow_nolck();
+    };
+
+
+    WindowStateGuard_Impl::WindowStateGuard_Impl( const Reference< XWindow2 >& _rxWindow, const Reference< XPropertySet >& _rxMdelProps )
+        :m_xWindow( _rxWindow )
+        ,m_xModelProps( _rxMdelProps )
+    {
+        if ( !m_xWindow.is() || !m_xModelProps.is() )
+            throw RuntimeException();
+
+        osl_atomic_increment( &m_refCount );
+        {
+            m_xWindow->addWindowListener( this );
+        }
+        osl_atomic_decrement( &m_refCount );
+    }
+
+
+    void WindowStateGuard_Impl::dispose()
+    {
+        ::osl::MutexGuard aGuard( m_aMutex );
+        if ( !m_xWindow.is() )
+            // already disposed
+            return;
+
+        m_xWindow->removeWindowListener( this );
+        m_xWindow.clear();
+    }
+
+
+    void WindowStateGuard_Impl::impl_ensureEnabledState_nothrow_nolck()
+    {
+        try
+        {
+            Reference< XWindow2 > xWindow;
+            Reference< XPropertySet > xModelProps;
+            bool bShouldBeEnabled = false;
+            {
+                ::osl::MutexGuard aGuard( m_aMutex );
+                if ( !m_xWindow.is() || !m_xModelProps.is() )
+                    return;
+                xWindow = m_xWindow;
+                xModelProps = m_xModelProps;
+            }
+            // fdo#42157: do not lock m_aMutex to prevent deadlock
+            bool const bEnabled = xWindow->isEnabled();
+            OSL_VERIFY( xModelProps->getPropertyValue( PROPERTY_ENABLED )
+                        >>= bShouldBeEnabled );
+
+            if ( !bShouldBeEnabled && bEnabled )
+                xWindow->setEnable( false );
+        }
+        catch( const Exception& )
+        {
+            DBG_UNHANDLED_EXCEPTION("forms.helper");
+        }
+    }
+
+
+    void SAL_CALL WindowStateGuard_Impl::windowEnabled( const EventObject& /*e*/ )
+    {
+        impl_ensureEnabledState_nothrow_nolck();
+    }
+
+
+    void SAL_CALL WindowStateGuard_Impl::windowDisabled( const EventObject& /*e*/ )
+    {
+        impl_ensureEnabledState_nothrow_nolck();
+    }
+
+
+    void SAL_CALL WindowStateGuard_Impl::windowResized( const WindowEvent& /*e*/ )
+    {
+        // not interested in
+    }
+
+
+    void SAL_CALL WindowStateGuard_Impl::windowMoved( const WindowEvent& /*e*/ )
+    {
+        // not interested in
+    }
+
+
+    void SAL_CALL WindowStateGuard_Impl::windowShown( const EventObject& /*e*/ )
+    {
+        // not interested in
+    }
+
+
+    void SAL_CALL WindowStateGuard_Impl::windowHidden( const EventObject& /*e*/ )
+    {
+        // not interested in
+    }
+
+
+    void SAL_CALL WindowStateGuard_Impl::disposing( const EventObject& Source )
+    {
+        OSL_ENSURE( Source.Source == m_xWindow, "WindowStateGuard_Impl::disposing: where does this come from?" );
+        dispose();
+    }
+
+    WindowStateGuard::WindowStateGuard()
+    {
+    }
+
+
+    WindowStateGuard::~WindowStateGuard()
+    {
+    }
+
+
+    void WindowStateGuard::attach( const Reference< XWindow2 >& _rxWindow, const Reference< XControlModel >& _rxModel )
+    {
+        if ( m_pImpl.is() )
+        {
+            m_pImpl->dispose();
+            m_pImpl = nullptr;
+        }
+
+        Reference< XPropertySet > xModelProps( _rxModel, UNO_QUERY );
+        OSL_ENSURE( xModelProps.is() || !_rxModel.is(), "WindowStateGuard::attach: a model which is no XPropertySet?" );
+        if ( _rxWindow.is() && xModelProps.is() )
+            m_pImpl = new WindowStateGuard_Impl( _rxWindow, xModelProps );
+    }
+
+
+} // namespace frm
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */