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| -rw-r--r-- | sd/source/ui/inc/OutlinerIteratorImpl.hxx | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/sd/source/ui/inc/OutlinerIteratorImpl.hxx b/sd/source/ui/inc/OutlinerIteratorImpl.hxx new file mode 100644 index 000000000..00be547c0 --- /dev/null +++ b/sd/source/ui/inc/OutlinerIteratorImpl.hxx @@ -0,0 +1,239 @@ +/* -*- 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 <OutlinerIterator.hxx> +#include <memory> + +class SdDrawDocument; +class SdPage; +class SdrObjListIter; + +namespace sd { + +class ViewShell; + +namespace outliner { + +/** Base class for the polymorphic implementation class of the + <type>Iterator</type> class. The iterators based on this class are + basically uni directional iterators. Their direction can, however, be + reversed at any point of their life time. +*/ +class IteratorImplBase +{ +public: + /** The constructor stores the given arguments to be used by the derived + classes. + @param pDocument + The document provides the information to be iterated on. + @param pViewShellWeak + Some information has to be taken from the view shell. + @param bDirectionIsForward + This flag defines the iteration direction. When <TRUE/> then + the direction is forwards otherwise it is backwards. + */ + IteratorImplBase (SdDrawDocument* pDocument, + const std::weak_ptr<ViewShell>& rpViewShellWeak, + bool bDirectionIsForward); + IteratorImplBase (SdDrawDocument* pDocument, + const std::weak_ptr<ViewShell>& rpViewShellWeak, + bool bDirectionIsForward, PageKind ePageKind, EditMode eEditMode); + virtual ~IteratorImplBase(); + + /** Advance to the next text of the current object or to the next object. + This takes the iteration direction into + account. The new object pointed to can be retrieved (among other + information) by calling the <member>GetPosition</member> method. + */ + virtual void GotoNextText() = 0; + /** Return an object that describes the current object. + @return + The returned object describes the current object pointed to by + the iterator. See the description of + <type>IteratorPosition</type> for details on the available + information. + */ + virtual const IteratorPosition& GetPosition(); + /** Create an exact copy of this object. No argument should be + specified when called from the outside. It then creates an object + first and passes that to the inherited <member>Clone()</member> + methods to fill in class specific information. + @return + Returns a copy of this object. When this method is called with + an argument then this value will be returned. + */ + virtual IteratorImplBase* Clone (IteratorImplBase* pObject=nullptr) const; + /** Test the equality of the this object and the given iterator. Two + iterators are taken to be equal when they point to the same object. + Iteration direction is not taken into account. + @param rIterator + The iterator to compare to. + @return + When both iterators are equal <TRUE/> is returned, <FALSE/> otherwise. + */ + virtual bool operator== (const IteratorImplBase& rIterator) const; + /** This method is used by the equality operator. It is part of a "multimethod" pattern. + @param rIterator + The iterator to compare to. + @return + Returns <TRUE/> when both iterators point to the same object. + */ + virtual bool IsEqualSelection(const IteratorImplBase& rIterator) const; + /** Reverse the direction of iteration. The current object stays the same. + */ + virtual void Reverse(); + +protected: + /// The current position as returned by <member>GetPosition()</member>. + IteratorPosition maPosition; + /// The document on whose data the iterator operates. + SdDrawDocument* mpDocument; + /// Necessary secondary source of information. + std::weak_ptr<ViewShell> mpViewShellWeak; + /// Specifies the search direction. + bool mbDirectionIsForward; +}; + +/** Iterator all objects that belong to the current mark list + a.k.a. selection. It is assumed that all marked objects belong to the + same page. It is further assumed that the mark list does not change + while an iterator is alive. It is therefore the responsibility of an + iterator's owner to handle the case of a changed mark list. + + <p>For documentation of the methods please refer to the base class + <type>IteratorImplBase</type>.</p> +*/ +class SelectionIteratorImpl + : public IteratorImplBase +{ +public: + SelectionIteratorImpl ( + const ::std::vector< ::tools::WeakReference<SdrObject> >& rObjectList, + sal_Int32 nObjectIndex, + SdDrawDocument* pDocument, + const std::weak_ptr<ViewShell>& rpViewShellWeak, + bool bDirectionIsForward); + SelectionIteratorImpl (const SelectionIteratorImpl& rObject); + virtual ~SelectionIteratorImpl() override; + + virtual void GotoNextText() override; + virtual const IteratorPosition& GetPosition() override; + virtual IteratorImplBase* Clone (IteratorImplBase* pObject = nullptr) const override; + virtual bool operator== (const IteratorImplBase& rIterator) const override; + +private: + const ::std::vector<::tools::WeakReference<SdrObject>>& mrObjectList; + sal_Int32 mnObjectIndex; + + /** Compare the given iterator with this object. This method handles + only the case that the given iterator is an instance of this class. + @param rIterator + The iterator to compare to. + @return + Returns <TRUE/> when both iterators point to the same object. + */ + virtual bool IsEqualSelection(const IteratorImplBase& rIterator) const override; + + IteratorImplBase& operator= (const IteratorImplBase& rIterator); +}; + +/** Iterator for iteration over all objects in a single view. On reaching + the last object on the last page (or the first object on the first page) + the view is *not* switched. Further calls to the + <member>GotoNextObject()</member> method will be ignored. + + <p>For documentation of the methods please refer to the base class + <type>IteratorImplBase</type>.</p> +*/ +class ViewIteratorImpl : public IteratorImplBase +{ +public: + ViewIteratorImpl ( + sal_Int32 nPageIndex, + SdDrawDocument* pDocument, + const std::weak_ptr<ViewShell>& rpViewShellWeak, + bool bDirectionIsForward); + ViewIteratorImpl ( + sal_Int32 nPageIndex, + SdDrawDocument* pDocument, + const std::weak_ptr<ViewShell>& rpViewShellWeak, + bool bDirectionIsForward, + PageKind ePageKind, + EditMode eEditMode); + virtual ~ViewIteratorImpl() override; + + virtual void GotoNextText() override; + virtual IteratorImplBase* Clone (IteratorImplBase* pObject = nullptr) const override; + virtual void Reverse() override; + +protected: + /** Set up page pointer and object list iterator for the specified + page. + @param nPageIndex + Index of the new page. It may lie outside the valid range for + page indices. + */ + void SetPage (sal_Int32 nPageIndex); + +private: + /// Indicates whether a page changed occurred on switching to current page. + bool mbPageChangeOccurred; + /// Pointer to the page associated with the current page index. May be NULL. + SdPage* mpPage; + /// Iterator of all objects on the current page. + std::unique_ptr<SdrObjListIter> mpObjectIterator; + + // Don't use this operator. + ViewIteratorImpl& operator= (const ViewIteratorImpl&) = delete; +}; + +/** Iterator for iteration over all objects in all views. It automatically + switches views when reaching the end/beginning of a view. + + <p>For documentation of the methods please refer to the base class + <type>IteratorImplBase</type>.</p> +*/ +class DocumentIteratorImpl : public ViewIteratorImpl +{ +public: + DocumentIteratorImpl ( + sal_Int32 nPageIndex, + PageKind ePageKind, + EditMode eEditMode, + SdDrawDocument* pDocument, + const std::weak_ptr<ViewShell>& rpViewShellWeak, + bool bDirectionIsForward); + virtual ~DocumentIteratorImpl() override; + + virtual void GotoNextText() override; + virtual IteratorImplBase* Clone (IteratorImplBase* pObject = nullptr) const override; + +private: + /// Number of pages in the view that is specified by <member>maPosition</member>. + sal_Int32 mnPageCount; + + // Don't use this operator. + DocumentIteratorImpl& operator= (const DocumentIteratorImpl& ) = delete; +}; + +} } // end of namespace ::sd::outliner + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |