sd/source/ui/tools/SlotStateListener.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <tools/SlotStateListener.hxx>
  21 #include <com/sun/star/frame/XDispatchProvider.hpp>
  22 #include <com/sun/star/frame/XDispatch.hpp>
  23 #include <com/sun/star/util/URLTransformer.hpp>
  24 #include <com/sun/star/util/XURLTransformer.hpp>
  25
  26 #include <comphelper/processfactory.hxx>
  27
  28 using namespace ::com::sun::star;
  29
  30 namespace sd::tools {
  31
  32 SlotStateListener::SlotStateListener (
  33     Link<const OUString&,void> const & rCallback,
  34     const uno::Reference<frame::XDispatchProvider>& rxDispatchProvider,
  35     const OUString& rSlotName)
  36     : SlotStateListenerInterfaceBase(maMutex),
  37       maCallback(),
  38       mxDispatchProviderWeak(nullptr)
  39 {
  40     SetCallback(rCallback);
  41     ConnectToDispatchProvider(rxDispatchProvider);
  42     ObserveSlot(rSlotName);
  43 }
  44
  45 SlotStateListener::~SlotStateListener()
  46 {
  47     ReleaseListeners();
  48 }
  49
  50 void SlotStateListener::SetCallback (const Link<const OUString&,void>& rCallback)
  51 {
  52     ThrowIfDisposed();
  53
  54     maCallback = rCallback;
  55 }
  56
  57 void SlotStateListener::ConnectToDispatchProvider (
  58     const uno::Reference<frame::XDispatchProvider>& rxDispatchProvider)
  59 {
  60     ThrowIfDisposed();
  61
  62     // When we are listening to state changes of slots of another frame then
  63     // release these listeners first.
  64     if ( ! maRegisteredURLList.empty())
  65         ReleaseListeners();
  66
  67     mxDispatchProviderWeak = rxDispatchProvider;
  68 }
  69
  70 void SlotStateListener::ObserveSlot (const OUString& rSlotName)
  71 {
  72     ThrowIfDisposed();
  73
  74     if (maCallback.IsSet())
  75     {
  76         // Connect the state change listener.
  77         util::URL aURL (MakeURL(rSlotName));
  78         uno::Reference<frame::XDispatch> xDispatch (GetDispatch(aURL));
  79         if (xDispatch.is())
  80         {
  81             maRegisteredURLList.push_back(aURL);
  82             xDispatch->addStatusListener(this,aURL);
  83         }
  84     }
  85 }
  86
  87 void SlotStateListener::disposing()
  88 {
  89     ReleaseListeners();
  90     mxDispatchProviderWeak = uno::WeakReference<frame::XDispatchProvider>(nullptr);
  91     maCallback = Link<const OUString&,void>();
  92 }
  93
  94 util::URL SlotStateListener::MakeURL (const OUString& rSlotName)
  95 {
  96     util::URL aURL;
  97     aURL.Complete = rSlotName;
  98
  99     uno::Reference<util::XURLTransformer> xTransformer(util::URLTransformer::create(::comphelper::getProcessComponentContext()));
 100     xTransformer->parseStrict(aURL);
 101
 102     return aURL;
 103 }
 104
 105 uno::Reference<frame::XDispatch>
 106     SlotStateListener::GetDispatch (const util::URL& rURL) const
 107 {
 108     uno::Reference<frame::XDispatch> xDispatch;
 109
 110     uno::Reference<frame::XDispatchProvider> xDispatchProvider (mxDispatchProviderWeak);
 111     if (xDispatchProvider.is())
 112         xDispatch = xDispatchProvider->queryDispatch(rURL, OUString(), 0);
 113
 114     return xDispatch;
 115 }
 116
 117 void SlotStateListener::statusChanged (
 118     const frame::FeatureStateEvent& rState)
 119 {
 120     ThrowIfDisposed();
 121     OUString sSlotName (rState.FeatureURL.Complete);
 122     maCallback.Call(sSlotName);
 123 }
 124
 125 void SlotStateListener::ReleaseListeners()
 126 {
 127     for (const auto& rURL : maRegisteredURLList)
 128     {
 129         uno::Reference<frame::XDispatch> xDispatch (GetDispatch(rURL));
 130         if (xDispatch.is())
 131         {
 132             xDispatch->removeStatusListener(this,rURL);
 133         }
 134     }
 135 }
 136
 137 //=====  lang::XEventListener  ================================================
 138
 139 void SAL_CALL SlotStateListener::disposing (
 140     const lang::EventObject& )
 141 {
 142 }
 143
 144 void SlotStateListener::ThrowIfDisposed()
 145 {
 146     if (rBHelper.bDisposed || rBHelper.bInDispose)
 147     {
 148         throw lang::DisposedException ("SlideSorterController object has already been disposed",
 149             static_cast<uno::XWeak*>(this));
 150     }
 151 }
 152
 153 } // end of namespace ::sd::tools
 154
 155 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */