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

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

4 files changed, 858 insertions, 0 deletions

diff --git a/framework/source/inc/loadenv/actionlockguard.hxx b/framework/source/inc/loadenv/actionlockguard.hxx
new file mode 100644
index 000000000..ee52fcc0d
--- /dev/null
+++ b/framework/source/inc/loadenv/actionlockguard.hxx
@@ -0,0 +1,141 @@
+/* -*- 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/document/XActionLockable.hpp>
+#include <mutex>
+
+namespace framework{
+
+/** @short  implements a guard, which can use the interface
+            <type scope="css::document">XActionLockable</type>.
+
+    @descr  This guard should be used to be sure, that any lock will be
+            released. Otherwise the locked document can hinder the office on shutdown!
+*/
+class ActionLockGuard final
+{
+
+    // member
+
+    private:
+        std::mutex m_mutex;
+
+        /** @short  points to the object, which can be locked from outside. */
+        css::uno::Reference< css::document::XActionLockable > m_xActionLock;
+
+        /** @short  knows if a lock exists on the internal lock object
+                    forced by this guard instance. */
+        bool m_bActionLocked;
+
+    // interface
+
+    public:
+
+        /** @short  default ctor to initialize a "non working guard".
+
+            @descr  That can be useful in cases, where no resource still exists,
+                    but will be available next time. Then this guard can be used
+                    in a mode "use guard for more than one resources".
+         */
+        ActionLockGuard()
+            : m_bActionLocked(false)
+        {
+        }
+
+        /** @short  release this guard instance and make sure, that no lock
+                    will exist afterwards on the internal wrapped resource.
+         */
+        ~ActionLockGuard()
+        {
+            unlock();
+        }
+
+        /** @short  set a new resource for locking at this guard.
+
+            @descr  This call will fail, if an internal resource already exists
+                    and is currently locked.
+
+            @param  xLock
+                    points to the outside resource, which should be locked.
+
+            @return sal_True, if new resource could be set and locked.
+                    sal_False otherwise.
+         */
+        bool setResource(const css::uno::Reference< css::document::XActionLockable >& xLock)
+        {
+            std::unique_lock g(m_mutex);
+
+            if (m_bActionLocked || !xLock.is())
+                return false;
+
+            m_xActionLock = xLock;
+            m_xActionLock->addActionLock();
+            m_bActionLocked = m_xActionLock->isActionLocked();
+
+            return true;
+        }
+
+        /** @short  set a new resource for locking at this guard.
+
+            @descr  This call will fail, if an internal resource already exists
+                    and is currently locked.
+
+            @param  xLock
+                    points to the outside resource, which should be locked.
+
+            @return sal_True, if new resource could be set and locked.
+                    sal_False otherwise.
+         */
+        void freeResource()
+        {
+            // SAFE -> ..........................
+            std::unique_lock aMutexLock(m_mutex);
+
+            css::uno::Reference< css::document::XActionLockable > xLock   = m_xActionLock;
+            bool                                                  bLocked = m_bActionLocked;
+
+            m_xActionLock.clear();
+            m_bActionLocked = false;
+
+            aMutexLock.unlock();
+            // <- SAFE ..........................
+
+            if (bLocked && xLock.is())
+                xLock->removeActionLock();
+        }
+
+        /** @short  unlock the internal wrapped resource, if it's not already done. */
+        void unlock()
+        {
+            std::unique_lock g(m_mutex);
+            if (m_bActionLocked && m_xActionLock.is())
+            {
+                m_xActionLock->removeActionLock();
+                // don't check for any locks here ...
+                // May another guard use the same lock object :-(
+                m_bActionLocked = false;
+            }
+        }
+};
+
+} // namespace framework
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/framework/source/inc/loadenv/loadenv.hxx b/framework/source/inc/loadenv/loadenv.hxx
new file mode 100644
index 000000000..351d39b94
--- /dev/null
+++ b/framework/source/inc/loadenv/loadenv.hxx
@@ -0,0 +1,540 @@
+/* -*- 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 <loadenv/actionlockguard.hxx>
+
+#include <com/sun/star/frame/XComponentLoader.hpp>
+#include <com/sun/star/frame/XFrame.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/util/URL.hpp>
+#include <rtl/ref.hxx>
+#include <unotools/mediadescriptor.hxx>
+#include <o3tl/typed_flags_set.hxx>
+
+
+/** @short  enable/disable special features
+            of a load request.
+
+    @desrc  Such features must outcome without
+            any special parameters.
+            To make enabling/disabling of
+            features very easy (e.g. at the ctor of
+             this class) these values must be combinable
+            as flags. That means: its values must be in
+            range of [2^n]!
+ */
+enum class LoadEnvFeatures
+{
+    /// we should be informed, if no feature is enabled :-)
+    NONE = 0,
+    /// enable using of UI elements during loading (means progress, interaction handler etcpp.)
+    WorkWithUI = 1,
+    /// enable loading of resources, which are not related to a target frame! (see concept of ContentHandler)
+    AllowContentHandler = 2
+};
+namespace o3tl {
+    template<> struct typed_flags<LoadEnvFeatures> : is_typed_flags<LoadEnvFeatures, 0x3> {};
+}
+
+
+namespace framework {
+
+class QuietInteraction;
+
+/** @short  implements general mechanism for loading documents.
+
+    @descr  An instance of this class can be used inside the API calls
+            XComponentLoader::loadComponentFromURL() and
+            XDispatch::dispatch().
+ */
+class LoadEnv
+{
+public:
+    /** @short  classify a content.
+
+        @descr  The load environment must know, if a content
+                is related to a target frame or not. Only "visible"
+                components, which fulfill the requirements of the
+                model-controller-view paradigm can be loaded into a frame.
+                Such contents are classified as E_CAN_BE_LOADED.
+
+                But e.g. for the dispatch framework exists special ContentHandler
+                objects, which can load a content in "non visible" mode ...
+                and do not need a target frame for its operation. Such
+                ContentHandler e.g. plays sounds.
+                Such contents are classified as E_CAN_BE_HANDLED.
+
+                And last but not least a content can be "not valid" in general.
+     */
+    enum EContentType
+    {
+        /// identifies a content, which seems to be invalid in general
+        E_UNSUPPORTED_CONTENT,
+        /// identifies a content, which can be used with a ContentHandler and is not related to a target frame
+        E_CAN_BE_HANDLED,
+        /// identifies a content, which can be loaded into a target frame
+        E_CAN_BE_LOADED,
+        /// special mode for non real loading, In such case the model is given directly!
+        E_CAN_BE_SET
+    };
+
+private:
+    mutable osl::Mutex m_mutex;
+
+    /** @short  reference to a uno service manager, which must be used
+                to created on needed services on demand.
+     */
+    css::uno::Reference< css::uno::XComponentContext > m_xContext;
+
+    /** @short  points to the frame, which uses this LoadEnv object
+                and must be used to start target search there.
+     */
+    css::uno::Reference< css::frame::XFrame > m_xBaseFrame;
+
+    /** @short  points to the frame, into which the new component was loaded.
+
+        @descr  Note: This reference will be empty if loading failed
+                or a non visible content was loaded!
+                It can be the same frame as m_xBaseFrame it describe, in case
+                the target "_self", "" or the search flag "SELF" was used.
+                Otherwise it's the new created or recycled frame, which was
+                used for loading and contains further the new component.
+
+                Please use method getTarget() or getTargetComponent()
+                to return the frame/controller or model to any interested
+                user of the results of this load request.
+     */
+    css::uno::Reference< css::frame::XFrame > m_xTargetFrame;
+
+    /** @short  contains the name of the target, in which the specified resource
+                of this instance must be loaded.
+     */
+    OUString m_sTarget;
+
+    /** @short  if m_sTarget is not a special one, this flags regulate searching
+                of a suitable one.
+     */
+    sal_Int32 m_nSearchFlags;
+
+    /** @short  contains all needed information about the resource,
+                which should be loaded.
+
+        @descr  Inside this struct e.g. the URL, its type and filter name,
+                the stream or a model directly are saved.
+     */
+    utl::MediaDescriptor m_lMediaDescriptor;
+
+    /** @short  because the mediadescriptor contains the complete URL ... but
+                some functionality need the structured version, we hold it twice :-(.
+     */
+    css::util::URL m_aURL;
+
+    /** @short  enable/disable special features of a load request. */
+    LoadEnvFeatures m_eFeature;
+
+    /** @short  classify the content, which should be loaded by this instance. */
+    EContentType m_eContentType;
+
+    /** @short  it indicates, that the member m_xTargetFrame was new created for this
+                load request and must be closed in case loading (not handling!)
+                operation failed. The default value is sal_False!
+     */
+    bool m_bCloseFrameOnError;
+
+    /** @short  it indicates, that the old document (which was located inside m_xBaseFrame
+                in combination with the m_sTarget value "_self") was suspended.
+                Normally it will be replaced by the new loaded document. But in case
+                loading (not handling!) failed, it must be reactivated.
+                The default value is sal_False!
+     */
+    bool m_bReactivateControllerOnError;
+
+    /** @short  it holds one (!) asynchronous used contenthandler or frameloader
+                alive, till the asynchronous operation will be finished.
+     */
+    css::uno::Reference< css::uno::XInterface > m_xAsynchronousJob;
+
+    /** @short  holds the information about the finished load process.
+
+        @descr  The content of m_xTargetFrame can't be used as valid indicator,
+                (in case the existing old document was reactivated)
+                we must hold the result of the load process explicitly.
+     */
+    bool m_bLoaded;
+
+    /** @short      holds an XActionLock on the internal used task member.
+
+        @seealso    m_xTargetFrame
+     */
+    ActionLockGuard m_aTargetLock;
+
+    rtl::Reference<QuietInteraction> m_pQuietInteraction;
+
+public:
+
+    /** @short  initialize a new instance of this load environment.
+
+        @param  xContext
+                reference to a uno service manager, which can be used internally
+                to create on needed services on demand.
+
+        @throw  Currently there is no reason to throw such exception!
+
+        @throw  A RuntimeException in case any internal process indicates, that
+                the whole runtime can't be used any longer.
+     */
+    LoadEnv(css::uno::Reference< css::uno::XComponentContext >  xContext);
+
+    /** @short  deinitialize an instance of this class in the right way.
+     */
+    ~LoadEnv();
+
+    /// @throws css::lang::IllegalArgumentException
+    /// @throws css::io::IOException
+    /// @throws css::uno::RuntimeException
+    static css::uno::Reference< css::lang::XComponent > loadComponentFromURL(const css::uno::Reference< css::frame::XComponentLoader >&    xLoader,
+                                                                             const css::uno::Reference< css::uno::XComponentContext >&     xContext,
+                                                                             const OUString&                                        sURL   ,
+                                                                             const OUString&                                        sTarget,
+                                                                                   sal_Int32                                               nFlags ,
+                                                                             const css::uno::Sequence< css::beans::PropertyValue >&        lArgs  );
+
+    /** @short  start loading of a resource
+
+        @descr  The parameter for targeting, the content description, and
+                some environment specifier (UI, dispatch functionality)
+                can be set here. Of course a still running load request
+                will be detected here and a suitable exception will be thrown.
+                Such constellation can be detected outside by using provided
+                synchronisation methods or callbacks.
+
+                There is no direct return value possible here. Because it depends
+                from the usage of this instance! E.g. for loading a "visible component"
+                a frame with a controller/model inside can be possible. For loading
+                of a "non visible component" only an information about a successfully start
+                can be provided.
+                Further it can't be guaranteed, that the internal process runs synchronous.
+                that's why we prefer using of specialized methods afterwards e.g. to:
+                    - wait till the internal job will be finished
+                      and get the results
+                    - or to let it run without any further control from outside.
+
+        @param  sURL
+                points to the resource, which should be loaded.
+
+        @param  lMediaDescriptor
+                contains additional information for the following load request.
+
+        @param  xBaseFrame
+                points to the frame which must be used as start point for target search.
+
+        @param  sTarget
+                regulate searching/creating of frames, which should contain the
+                new loaded component afterwards.
+
+        @param  nSearchFlags
+                regulate searching of targets, if sTarget is not a special one.
+
+        @param  eFeature
+                flag field, which enable/disable special features of this
+                new instance for following load call.
+
+        @throw  A LoadEnvException e.g. if another load operation is till in progress
+                or initialization of a new one fail by other reasons.
+                The real reason, a suitable message and ID will be given here immediately.
+
+        @throw  A RuntimeException in case any internal process indicates, that
+                the whole runtime can't be used any longer.
+     */
+    void startLoading(const OUString&                                           sURL            ,
+                           const css::uno::Sequence< css::beans::PropertyValue >&    lMediaDescriptor,
+                           const css::uno::Reference< css::frame::XFrame >&          xBaseFrame      ,
+                           const OUString&                                           sTarget         ,
+                                 sal_Int32                                           nSearchFlags    ,
+                                 LoadEnvFeatures                                     eFeature        = LoadEnvFeatures::NONE);
+
+    /** @short  wait for an already running load request (started by calling
+                startLoading() before).
+
+        @descr  The timeout parameter can be used to wait some times only
+                or forever. The return value indicates if the load request
+                was finished during the specified timeout period.
+                But it indicates not, if the load request was successful or not!
+
+        @param  nTimeout
+                specify a timeout in [ms].
+                A value 0 let it wait forever!
+
+        @return sal_True if the started load process could be finished in time;
+                sal_False if the specified time was over.
+
+        @throw  ... currently not used :-)
+
+        @throw  A RuntimeException in case any internal process indicates, that
+                the whole runtime can't be used any longer.
+     */
+    bool waitWhileLoading(sal_uInt32 nTimeout = 0);
+
+    /** TODO document me ... */
+    css::uno::Reference< css::lang::XComponent > getTargetComponent() const;
+
+public:
+
+    /** @short      checks if the specified content can be handled by a
+                    ContentHandler only and is not related to a target frame,
+                    or if it can be loaded by a FrameLoader into a target frame
+                    as "visible" component.
+
+        @descr      using:
+                        switch(classifyContent(...))
+                        {
+                            case E_CAN_BE_HANDLED :
+                                handleIt(...);
+                                break;
+
+                            case E_CAN_BE_LOADED :
+                                xFrame = locateTargetFrame();
+                                loadIt(xFrame);
+                                break;
+
+                            case E_NOT_A_CONTENT :
+                            default              : throw ...;
+                        }
+
+        @param      sURL
+                    describe the content.
+
+        @param      lMediaDescriptor
+                    describe the content more detailed!
+
+        @return     A suitable enum value, which classify the specified content.
+     */
+    static EContentType classifyContent(const OUString&                                 sURL            ,
+                                        const css::uno::Sequence< css::beans::PropertyValue >& lMediaDescriptor);
+
+    /** TODO document me ... */
+    static  void initializeUIDefaults(
+                const css::uno::Reference< css::uno::XComponentContext >& i_rxContext,
+                utl::MediaDescriptor& io_lMediaDescriptor,
+                const bool _bUIMode,
+                rtl::Reference<QuietInteraction>* o_ppQuiteInteraction
+            );
+
+    /** TODO document me ... */
+    void impl_setResult(bool bResult);
+
+    /** TODO document me ... */
+    css::uno::Reference< css::uno::XInterface > impl_searchLoader();
+
+    /** @short  it means; show the frame, bring it to front,
+                might set the right icon etcpp. in case loading was
+                successfully or reactivate a might existing old document or
+                close the frame if it was created before in case loading failed.
+
+        @throw  A LoadEnvException only in cases, where an internal error indicates,
+                that the complete load environment seems to be not usable in general.
+                In such cases a RuntimeException would be to hard for the outside code :-)
+
+        @throw  A RuntimeException in case any internal process indicates, that
+                the whole runtime can't be used any longer.
+     */
+    void impl_reactForLoadingState();
+
+private:
+    void start();
+
+    /** @short  tries to detect the type and the filter of the specified content.
+
+        @descr  This method update the available media descriptor of this instance,
+                so it contains the right type, a corresponding filter, may a
+                valid frame loader etc. In case detection failed, this descriptor
+                is corrected first, before a suitable exception will be thrown.
+                (Excepting a RuntimeException occurrence!)
+
+        @attention  Not all types we know, are supported by filters. So it does not
+                    indicates an error, if no suitable filter(loader etcpp will be found
+                    for a type. But a type must be detected for the specified content.
+                    Otherwise it's an error and loading can't be finished successfully.
+
+        @throw  A LoadEnvException if detection failed.
+
+        @throw  A RuntimeException in case any internal process indicates, that
+                the whole runtime can't be used any longer.
+     */
+    void impl_detectTypeAndFilter();
+
+    /** @short  tries to use ContentHandler objects for loading.
+
+        @descr  It searches for a suitable content handler object, registered
+                for the detected content type (must be done before by calling
+                impl_detectTypeAndFilter()). Because such handler does not depend
+                from a real target frame, location of such frame will be
+                suppressed here.
+                In case handle failed all new created resources will be
+                removed before a suitable exception is thrown.
+                (Excepting a RuntimeException occurrence!)
+
+        @return TODO
+
+        @throw  A LoadEnvException if handling failed.
+
+        @throw  A RuntimeException in case any internal process indicates, that
+                the whole runtime can't be used any longer.
+     */
+    bool impl_handleContent();
+
+    /** @short  tries to use FrameLoader objects for loading.
+
+        @descr  First the target frame will be located. If it could be found
+                or new created a filter/frame loader will be instantiated and
+                used to load the content into this frame.
+                In case loading failed all new created resources will be
+                removed before a suitable exception is thrown.
+                (Excepting a RuntimeException occurrence!)
+
+        @return TODO
+
+        @throw  A LoadEnvException if loading failed.
+
+        @throw  A RuntimeException in case any internal process indicates, that
+                the whole runtime can't be used any longer.
+     */
+    bool impl_loadContent();
+
+    /** @short  checks if the specified content is already loaded.
+
+        @descr  It depends from the set target information, if such
+                search is allowed or not! So this method checks first,
+                if the target is the special one "_default".
+                If not it returns with an empty result immediately!
+                In case search is allowed, an existing document with the
+                same URL is searched. If it could be found, the corresponding
+                view will get the focus and this method return the corresponding frame.
+                Optional jumpmarks will be accepted here too. So the
+                view of the document will be updated to show the position
+                inside the document, which is related to the jumpmark.
+
+        @return A valid reference to the target frame, which contains the already loaded content
+                and could be activated successfully. An empty reference otherwise.
+
+        @throw  A LoadEnvException only in cases, where an internal error indicates,
+                that the complete load environment seems to be not usable in general.
+                In such cases a RuntimeException would be to hard for the outside code :-)
+
+        @throw  A RuntimeException in case any internal process indicates, that
+                the whole runtime can't be used any longer.
+     */
+    css::uno::Reference< css::frame::XFrame > impl_searchAlreadyLoaded();
+
+    /** @short  search for any target frame, which seems to be usable
+                for this load request.
+
+        @descr  Because this special feature is bound to the target specifier "_default"
+                its checked inside first. If it's not set => this method return an empty
+                reference. Otherwise any currently existing frame will be analyzed, if
+                it can be used here. The following rules exists:
+
+                <ul>
+                    <li>The frame must be empty ...</li>
+                    <li>or contains an empty document of the same application module
+                        which the new document will have (Note: the filter of the new content
+                        must be well known here!)</li>
+                    <li>and(!) this target must not be already used by any other load request.</li>
+                </ul>
+
+                If a suitable target is located it will be locked. That's why the last rule
+                exists! If this method returns a valid frame reference, it was locked to be usable
+                for this load request only. (Don't forget to reset this state later!)
+                Concurrent LoadEnv instances can synchronize her work be using such locks :-) HOPEFULLY
+
+        @throw  A LoadEnvException only in cases, where an internal error indicates,
+                that the complete load environment seems to be not usable in general.
+                In such cases a RuntimeException would be to hard for the outside code :-)
+
+        @throw  A RuntimeException in case any internal process indicates, that
+                the whole runtime can't be used any longer.
+     */
+    css::uno::Reference< css::frame::XFrame > impl_searchRecycleTarget();
+
+    /** @short  because showing of a frame is needed more than once...
+                it's implemented as a separate method .-)
+
+        @descr  Note: Showing of a frame is bound to a special feature...
+                a) If we recycle any existing frame, we must bring it to front.
+                   Showing of such frame is not needed really... because we recycle
+                   visible frames only!
+                b) If the document was already shown (e.g. by our progress implementation)
+                   we do nothing here. The reason behind: The document was already shown...
+                   and it was already make a top window...
+                   If the user activated another frame inbetween (because loading needed some time)
+                   it's not allowed to disturb the user again. Then the frame must resists in the background.
+                c) If the frame was not shown before... but loading of a visible document into this frame
+                   was finished... we need both actions: setVisible() and toFront().
+
+        @param  xWindow
+                points to the container window of a frame.
+
+        @param  bForceToFront
+                if it's set to sal_False... showing of the window is done more intelligent.
+                setVisible() is called only if the window was not shown before.
+                This mode is needed by b) and c)
+                If it's set to sal_True... both actions has to be done: setVisible(), toFront()!
+                This mode is needed by a)
+     */
+    void impl_makeFrameWindowVisible(const css::uno::Reference< css::awt::XWindow >& xWindow      ,
+                                           bool                                  bForceToFront);
+
+    /** @short  checks whether a frame is already used for another load request or not.
+
+        @descr  Such frames can't be used for our "recycle feature"!
+
+        @param  xFrame
+                the frame, which should be checked.
+
+        @return [sal_Bool]
+                sal_True if this frame is already used for loading,
+                sal_False otherwise.
+     */
+    bool impl_isFrameAlreadyUsedForLoading(const css::uno::Reference< css::frame::XFrame >& xFrame) const;
+
+    /** @short  try to determine the used application module
+                of this load request and apply right position and size
+                for this document window... hopefully before we show it .-)
+     */
+    void impl_applyPersistentWindowState(const css::uno::Reference< css::awt::XWindow >& xWindow);
+
+    /** @short  determine if it's allowed to open new document frames.
+     */
+    bool impl_furtherDocsAllowed();
+
+    /** @short  jumps to the requested bookmark inside a given document.
+     */
+    void impl_jumpToMark(const css::uno::Reference< css::frame::XFrame >& xFrame,
+                         const css::util::URL&                            aURL  );
+
+    /** @short  determine if this loader has an interactive dialog shown before
+                loading the document.
+     */
+    bool impl_filterHasInteractiveDialog() const;
+};
+
+} // namespace framework
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/framework/source/inc/loadenv/loadenvexception.hxx b/framework/source/inc/loadenv/loadenvexception.hxx
new file mode 100644
index 000000000..62a17d2ac
--- /dev/null
+++ b/framework/source/inc/loadenv/loadenvexception.hxx
@@ -0,0 +1,87 @@
+/* -*- 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/uno/Any.hxx>
+#include <utility>
+
+namespace framework{
+
+/** @short  specify an exception, which can be used inside the
+            load environment only.
+
+    @descr  Of course outside code must wrap it, to transport
+            the occurred information to its caller.
+ */
+class LoadEnvException
+{
+    public:
+        /** @short  Can be used as an ID for an instance of a LoadEnvException.
+            @descr  To prevent errors on adding/removing/changing such IDs here,
+                    an enum field is used. Its int values are self organized...
+         */
+        enum EIDs
+        {
+            /** @short  The specified URL/Stream/etcpp. can not be handled by a LoadEnv instance. */
+            ID_UNSUPPORTED_CONTENT,
+
+            /** @short  indicates a corrupted media descriptor.
+                @descr  Some parts are required - some other ones are optional. Such exception
+                        should be thrown, if a required item does not exists. */
+            ID_INVALID_MEDIADESCRIPTOR,
+
+            /** @short  Its similar to a uno::RuntimeException...
+                @descr  But such runtime exception can break the whole office code.
+                        So its capsulated to this specialized load environment only.
+                        Mostly it indicates a missing but needed resource ... e.g the
+                        global desktop reference! */
+            ID_INVALID_ENVIRONMENT,
+
+            /** @short  indicates a failed search for the right target frame. */
+            ID_NO_TARGET_FOUND,
+
+            /** @short  TODO */
+            ID_COULD_NOT_REACTIVATE_CONTROLLER,
+
+            /** @short  indicates an already running load operation. Of course the same
+                        instance can't be used for multiple load requests at the same time.
+             */
+            ID_STILL_RUNNING,
+
+            /** @short  sometimes we can't specify the reason for an error, because we
+                        was interrupted by a called code in an unexpected way ...
+             */
+            ID_GENERAL_ERROR
+        };
+
+        sal_Int32 m_nID;
+        OUString m_sMessage;
+        css::uno::Any m_exOriginal;
+
+        LoadEnvException(
+            sal_Int32 id, OUString message = OUString(),
+            css::uno::Any original = css::uno::Any()):
+            m_nID(id), m_sMessage(std::move(message)), m_exOriginal(std::move(original))
+        {}
+};
+
+} // namespace framework
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/framework/source/inc/loadenv/targethelper.hxx b/framework/source/inc/loadenv/targethelper.hxx
new file mode 100644
index 000000000..1f0d93d7e
--- /dev/null
+++ b/framework/source/inc/loadenv/targethelper.hxx
@@ -0,0 +1,90 @@
+/* -*- 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 <rtl/ustring.hxx>
+
+namespace framework{
+
+/** @short  can be used to detect, if a target name (used e.g. for XFrame.findFrame())
+            has a special meaning or can be used as normal frame name (e.g. for XFrame.setName()).
+ */
+class TargetHelper
+{
+
+    public:
+
+        /** @short  it's used at the following interfaces to classify
+                    target names.
+         */
+        enum class ESpecialTarget
+        {
+            Blank,
+            Default,
+            Beamer,
+            HelpTask
+        };
+
+    // interface
+
+    public:
+
+        /** @short  it checks the given unknown target name,
+                    if it's the expected special one.
+
+            @note   An empty target is similar to "_self"!
+
+            @param  sCheckTarget
+                    must be the unknown target name, which should be checked.
+
+            @param  eSpecialTarget
+                    represent the expected target.
+
+            @return It returns <TRUE/> if <var>sCheckTarget</var> represent
+                    the expected <var>eSpecialTarget</var> value; <FALSE/> otherwise.
+         */
+        static bool matchSpecialTarget(std::u16string_view sCheckTarget  ,
+                                                 ESpecialTarget   eSpecialTarget);
+
+        /** @short  it checks, if the given name can be used
+                    to set it at a frame using XFrame.setName() method.
+
+            @descr  Because we handle special targets in a hard coded way
+                    (means we do not check the real name of a frame then)
+                    such named frames will never be found!
+
+                    And in case such special names can exists one times only
+                    by definition inside the same frame tree (e.g. _beamer and
+                    OFFICE_HELP_TASK) it's not a good idea to allow anything here :-)
+
+                    Of course we can't check unknown names, which are not special ones.
+                    But we decide, that it's not allowed to use "_" as first sign
+                    (because we reserve this letter for our own purposes!)
+                    and the value must not a well known special target.
+
+            @param  sName
+                    the new frame name, which should be checked.
+         */
+        static bool isValidNameForFrame(std::u16string_view sName);
+};
+
+} // namespace framework
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */