textchainflow.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
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 * 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
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 */
 
#pragma once
 
#include "textchain.hxx"
#include <memory>
 
class SdrTextObj;
class SdrOutliner;
class NonOverflowingText;
class OverflowingText;
class TextChain;
class OutlinerParaObject;
class OFlowChainedText;
class UFlowChainedText;
 
class TextChainFlow
{
public:
    TextChainFlow(SdrTextObj* pChainTarget);
    virtual ~TextChainFlow();
 
    // Check for flow events in Outliner
    virtual void CheckForFlowEvents(SdrOutliner*);
 
    void ExecuteUnderflow(SdrOutliner*);
 
    // Uses two outliners: one for the non-overflow text and one for overflowing (might be the same)
    void ExecuteOverflow(SdrOutliner*, SdrOutliner*);
 
    bool IsOverflow() const;
    bool IsUnderflow() const;
 
    SdrTextObj* GetLinkTarget() const;
 
protected:
    void impCheckForFlowEvents(SdrOutliner*, SdrOutliner*);
 
    TextChain* GetTextChain() const;
 
    virtual void impLeaveOnlyNonOverflowingText(SdrOutliner*);
    void impMoveChainedTextToNextLink(SdrOutliner*);
 
    virtual void impSetFlowOutlinerParams(SdrOutliner*, SdrOutliner*);
 
private:
    void impUpdateCursorInfo();
 
protected:
    std::unique_ptr<OFlowChainedText> mpOverflChText;
    std::unique_ptr<UFlowChainedText> mpUnderflChText;
    // Cursor related
    ESelection maOverflowPosSel;
    ESelection maPostChainingSel;
    bool mbPossiblyCursorOut;
 
private:
    SdrTextObj* mpTargetLink;
    SdrTextObj* mpNextLink;
    TextChain* mpTextChain;
    bool mbOFisUFinduced;
    bool bUnderflow;
    bool bOverflow;
};
 
// NOTE: EditingTextChainFlow might be strongly coupled with behavior in SdrTextObj::onChainingEvent
class EditingTextChainFlow final : public TextChainFlow
{
public:
    EditingTextChainFlow(SdrTextObj*);
    virtual void CheckForFlowEvents(SdrOutliner*) override;
 
    //virtual void ExecuteOverflow(SdrOutliner *, SdrOutliner *) override;
 
private:
    virtual void impLeaveOnlyNonOverflowingText(SdrOutliner*) override;
 
    virtual void impSetFlowOutlinerParams(SdrOutliner*, SdrOutliner*) override;
 
    void impBroadcastCursorInfo() const;
};
 
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