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, 208 insertions, 0 deletions

diff --git a/extensions/source/propctrlr/composeduiupdate.hxx b/extensions/source/propctrlr/composeduiupdate.hxx
new file mode 100644
index 000000000..5e356af1f
--- /dev/null
+++ b/extensions/source/propctrlr/composeduiupdate.hxx
@@ -0,0 +1,208 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <com/sun/star/inspection/XObjectInspectorUI.hpp>
+#include <com/sun/star/inspection/XPropertyHandler.hpp>
+
+#include <memory>
+
+
+namespace pcr
+{
+
+    struct MapHandlerToUI;
+
+    /** callback for a ComposedPropertyUIUpdate checking a given property for existence
+    */
+    class SAL_NO_VTABLE IPropertyExistenceCheck
+    {
+    public:
+        /// @throws css::uno::RuntimeException
+        virtual bool hasPropertyByName( const OUString& _rName ) = 0;
+
+    protected:
+        ~IPropertyExistenceCheck() {}
+    };
+
+    /** helper class composing requests to a ->XObjectInspectorUI interface, coming
+        from multiple sources
+
+        Usually, a handler tells the browser UI to enable to disable, or show or hide, certain
+        elements. Now when multiple handlers do this, their instructions must be combined:
+        If one handler disables a certain element, but others enable it, it must in the
+        result still be disabled. Similar for showing/hiding elements.
+
+        ->ComposedPropertyUIUpdate implements this combination. It does so by providing a dedicated
+        ->XObjectInspectorUI instance for every participating handler, and remembering the UI
+        state on a per-handler basis. Upon request (->fire), the combined UI state is
+        forwarded to another ->XObjectInspectorUI instance, the so-called delegator UI.
+    */
+    class ComposedPropertyUIUpdate
+    {
+    private:
+        std::unique_ptr< MapHandlerToUI >     m_pCollectedUIs;
+        css::uno::Reference< css::inspection::XObjectInspectorUI >
+                                                m_xDelegatorUI;
+        oslInterlockedCount                     m_nSuspendCounter;
+        IPropertyExistenceCheck*                m_pPropertyCheck;
+
+    public:
+        /** constructs a ->ComposedPropertyUIUpdate instance
+            @param _rxDelegatorUI
+                a ->XObjectInspectorUI instance to which composed UI requests should be forwarded. Must
+                not be <NULL/>.
+            @param _pPropertyCheck
+                an instance checking properties for existence. If this is not <NULL/>, it will be invoked
+                whenever one of the ->XObjectInspectorUI methods is called, to check the passed property
+                name.<br/>
+                Beware of lifetime issues. The instance pointed to by <arg>_pPropertyCheck</arg> must
+                live at least as long as the ->ComposedPropertyUIUpdate instance you're going to create.
+            @throws css::lang::NullPointerException
+                if ->_rxDelegatorUI is <NULL/>
+        */
+        ComposedPropertyUIUpdate(
+            const css::uno::Reference< css::inspection::XObjectInspectorUI >& _rxDelegatorUI,
+            IPropertyExistenceCheck* _pPropertyCheck );
+        ~ComposedPropertyUIUpdate();
+
+        /** returns the delegator UI
+            @throw css::lang::DisposedException
+        */
+        css::uno::Reference< css::inspection::XObjectInspectorUI > const & getDelegatorUI() const;
+
+        /** returns a ->XObjectInspectorUI instance belonging to a given property handler
+
+            In every call to an ->XPropertyHandler method which requires a ->XObjectInspectorUI,
+            the same UI instance should be used. The instance here will cache all requests passed
+            to it, and ->ComposedPropertyUIUpdate::fire will use the combination of all
+            cached UI states of all handlers to update the delegator UI.
+        */
+        css::uno::Reference< css::inspection::XObjectInspectorUI >
+            getUIForPropertyHandler( const css::uno::Reference< css::inspection::XPropertyHandler >& _rxHandler );
+
+        /** Suspends automatic firing of UI changes
+
+            normally, as soon as any of the property handlers does a request for an
+            arbitrary UI change, the set of collected UI changes is evaluated, and the combined
+            UI state is fired to the delegator UI.
+
+            You can disable this automatic firing by calling ->suspendAutoFire. As longs as auto
+            firing is suspended, only explicit ->fire calls trigger the notification to the
+            delegator UI.
+
+            Note that calls to ->suspendAutoFire are cumulative, that is, if you make multiple calls
+            they must be accompanied by an equal number of calls to ->resumeAutoFire, to enable
+            auto-firing again.
+
+            @seealso resumeAutoFire
+        */
+        void suspendAutoFire();
+
+        /** Suspends automatic firing of UI changes
+
+            @seealso suspendAutoFire
+        */
+        void resumeAutoFire();
+
+        /** disposes the instance, so it becomes non-functional.
+
+            All cached handlers and cached ->XObjectInspectorUI instances will be released,
+            the latter will also be disposed, so that if anybody still holds a reference to them
+            and tries to operate them will get a DisposedException.
+        */
+        void dispose();
+
+        /** invokes m_pPropertyCheck to check whether a given property should be handled
+        */
+        bool shouldContinuePropertyHandling( const OUString& _rName ) const;
+
+    private:
+        /// determines whether the instance is already disposed
+        bool impl_isDisposed() const { return !m_pCollectedUIs; }
+
+        /// throws an exception if the component is already disposed
+                void impl_checkDisposed() const;
+
+        /** fires the collected UI changes to our delegator UI
+
+            All operations for any elements are forwarded:
+            <ul><li>If an element has been hidden at least once, it's also hidden at the delegator UI.</li>
+                <li>If an element has been shown at least once, and never been hidden, it's also
+                    shown at the delegator UI.</li>
+                <li>If an element has never been shown or hidden, it's also not touched at the delegator UI.</li>
+                <li>The same holds if you replace "hidden" in the last three items with "disabled",
+                    and "shown" with "enabled".</li>
+                <li>If an element should have been rebuilt (->XObjectInspectorUI::rebuiltPropertyUI)
+                    at least once, it's rebuilt at the delegator UI, too.<br/>
+                    After that, the request to rebuild the UI for this property is cleared, so subsequent
+                    calls to ->fire will not trigger a new rebuilt request.
+            </ul>
+
+            @precond
+                instance is not disposed
+        */
+        void    impl_fireAll_throw();
+
+        /// fires the combination of ->XObjectInspectorUI::enablePropertyUI calls
+        void    impl_fireEnablePropertyUI_throw();
+
+        /// fires the combination of ->XObjectInspectorUI::enablePropertyUIElements calls
+        void    impl_fireEnablePropertyUIElements_throw();
+
+        /// fires the combination of ->XObjectInspectorUI::rebuildPropertyUI calls
+        void    impl_fireRebuildPropertyUI_throw();
+
+        /// fires the combination of ->XObjectInspectorUI::showPropertyUI and ->XObjectInspectorUI::hidePropertyUI calls
+        void    impl_fireShowHidePropertyUI_throw();
+
+        /// fires the combination of ->XObjectInspectorUI::showCategory calls
+        void    impl_fireShowCategory_throw();
+
+        /** callback for when a single property handler requested any change in the inspector UI
+        */
+        void    callback_inspectorUIChanged_throw();
+
+    private:
+        ComposedPropertyUIUpdate( const ComposedPropertyUIUpdate& ) = delete;
+        ComposedPropertyUIUpdate& operator=( const ComposedPropertyUIUpdate& ) = delete;
+    };
+
+    class ComposedUIAutoFireGuard
+    {
+    private:
+        ComposedPropertyUIUpdate&   m_rUIUpdate;
+    public:
+        explicit ComposedUIAutoFireGuard( ComposedPropertyUIUpdate& _rUIUpdate )
+            :m_rUIUpdate( _rUIUpdate )
+        {
+            m_rUIUpdate.suspendAutoFire();
+        }
+        ~ComposedUIAutoFireGuard() COVERITY_NOEXCEPT_FALSE
+        {
+            m_rUIUpdate.resumeAutoFire();
+        }
+    };
+
+
+} // namespace pcr
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */