layer.h

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// $Id: layer.h 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
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----------------------------------

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=================================XARAHEADEREND============================
 */

// declares LayerStatus and Layer classes

#ifndef INC_LAYER
#define INC_LAYER

//#include "npaper.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "convert.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "bitmap.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "quality.h" - in camtypes.h [AUTOMATICALLY REMOVED]

class Document;
class DocView;
class DocColour;
class IndexedColour;
class LayerMsgHandler;
//class KernelBitmapRef;

/********************************************************************************************

>   class LayerStatus: public CCObject  

    Author:     Simon_Maneggio (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/1/94
    Purpose:    This class (structure) holds layer information which can be changed by the 
                user.  
                The reason that this information is held in a seperate class is that it needs 
                to be stored in both the Layer and Layer Manager classes. 
    SeeAlso:    Layer
                LayerManager

********************************************************************************************/


class LayerStatus  
{
public: 
    String_256 StringLayerID; // Layer identifier. This should be unique within a spread

    LayerStatus(); 
    LayerStatus(LayerStatus& ls); 
    INT32 operator==(LayerStatus); 
}; 

/***********************************************************************************************

>   class Layer : public NodeRenderablePaper

    Author:     Simon_Maneggio (Xara Group Ltd) <camelotdev@xara.com>
    Created:    25/4/93
    Purpose:    Layers optionally exist on a page, they group together objects which are drawn
                at a particular level in a document. 
                
    SeeAlso:    NodeRenderablePaper   
    SeeAlso:    Chapter
    SeeAlso:    Spread
    SeeAlso:    Page

***********************************************************************************************/

class Layer: public NodeRenderablePaper
{   
    CC_DECLARE_DYNAMIC( Layer ) 
public:

    Layer();   
    ~Layer();
    
    Layer(Node* ContextNode,  
          AttachNodeDirection Direction,
          const String_256 &LayerID, 
          BOOL Locked=FALSE, 
          BOOL Mangled=FALSE,  
          BOOL Marked=FALSE, 
          BOOL Selected=FALSE 
          );      
    
    static BOOL Init();
    static void Deinit();

    String Describe(BOOL Plural, BOOL Verbose);     
 
    virtual SubtreeRenderState RenderSubtree(RenderRegion *pRender, Node** ppNextNode = NULL, BOOL bClip = TRUE);
    virtual void RenderAfterSubtree(RenderRegion *pRender);

    virtual BOOL NeedsToExport(RenderRegion *pRender,BOOL VisibleLayersOnly = FALSE,
                               BOOL CheckSelected = FALSE);
    void PreExportRender(RenderRegion* pRegion);
    BOOL ExportRender(RenderRegion* pRegion);
    BOOL IsLayer() const;

    // obtains its page's pasteboard rectangle
    // obtains its page's pasteboard rectangle
    DocRect GetPasteboardRect(BOOL Pixelise = TRUE, View *pView = NULL) const;
      
    #ifdef _DEBUG
    void ShowDebugTreeDetails() const;
    #endif  

    Layer* FindNextLayer(BOOL ExcludeInvisible = FALSE, BOOL ExcludeLocked = FALSE);
    Layer* FindPrevLayer(BOOL ExcludeInvisible = FALSE, BOOL ExcludeLocked = FALSE);

    // Special frame related find layer functions
    Layer* FindNextFrameLayer(); 
    Layer* FindPrevFrameLayer(); 

    // Called when a node is being hidden
    virtual BOOL HidingNode();

    // Query Layer status functions 
    BOOL IsVisible(DocView* pDocView = NULL);
    BOOL IsLocked(); 
    BOOL IsActive(); 
    BOOL IsPrintable(); 
    BOOL IsBackground(); 
    BOOL IsOutline();
    BOOL IsGuide();
    BOOL IsPageBackground();
    String_256& GetLayerID(); 

    // Query Frame status functions
    BOOL IsOverlay();
    BOOL IsSolid();
    BOOL IsEdited();
    BOOL IsFrame();
    BOOL IsHiddenFrame();
    
    BOOL IsPseudoFrame();

    // These functions are used to return the real settings of some of the flags
    // This is because some IsX() functions take other things into account
    BOOL GetVisibleFlagState();
    BOOL GetLockedFlagState();

    // Has the layer got any renderable children
    BOOL HasLayerGotRenderableChildren();

    // When going through the layers to work out bounding boxes for the drawing
    // use this to determine if a layer should be included in the calculation
    BOOL IncludeLayerInBoundingCalcs();

    LayerStatus& GetLayerStatus(); 
    
public:
    // Set Layers status functions 
    void SetVisible(BOOL Status); 
    void SetLocked(BOOL Status); 
    void SetActive(BOOL Status); 
    void SetPrintable(BOOL Status); 
    void SetBackground(BOOL Status); 
    void SetOutline(BOOL Status);
    void SetGuide(BOOL Status);
    void SetPageBackground(BOOL Status);
    void SetLayerID(String_256& LayerID); 
    void SetLayerStatus(LayerStatus& Status); 
    
    // Set frame status functions
    void SetSolid(BOOL Status);
    void SetOverlay(BOOL Status);
    void SetEdited(BOOL Status);
    void SetFrame(BOOL Status);
    void SetHiddenFrame(BOOL Status);

    void EnsureUniqueLayerID(void);

public:
    void GetDebugDetails(StringBase* Str); 
    virtual UINT32 GetNodeSize() const;             // Returns size of node in bytes

    // Returns the bounding rect of the layer inflated by the size of a blob
    virtual DocRect GetBlobBoundingRect();

    BOOL        BelongsToDocument(Document* pDoc);
    Document*   FindDocument();

    // Op permission functions
    virtual BOOL AllowOp(ObjChangeParam* pParam,BOOL SetOpPermissionState = TRUE,
                                                BOOL DoPreTriggerEdit = TRUE);
    virtual void SetOpPermission(OpPermissionState NewState,BOOL AndParents = FALSE);

    static BOOL ActiveLayerVisibleAndEditable;
    static INT32 EnableLayerCacheing;

    // Guide layer colour stuff
    DocColour*  GetGuideColour();
    void        SetGuideColour(IndexedColour* pIndexedColour);
    void        MakeGuideColourDefault();
    DocColour   GetDefaultGuideColour();
    void        ColourChanged(IndexedColour* pChangedColour);
    void        ColourDeleted();

    virtual void PolyCopyNodeContents(NodeRenderable* pNodeCopy);

public:
    // Version 2 file format functions
    virtual BOOL WritePreChildrenWeb(BaseCamelotFilter* pFilter);
    virtual BOOL WritePreChildrenNative(BaseCamelotFilter* pFilter);
    virtual BOOL WritePostChildrenWeb(BaseCamelotFilter* pFilter);
    virtual BOOL WritePostChildrenNative(BaseCamelotFilter* pFilter);
    virtual BOOL CanWriteChildrenWeb(BaseCamelotFilter* pFilter);
    virtual BOOL CanWriteChildrenNative(BaseCamelotFilter* pFilter);

    virtual BOOL WriteBeginChildRecordsWeb(BaseCamelotFilter* pFilter);
    virtual BOOL WriteBeginChildRecordsNative(BaseCamelotFilter* pFilter);
    virtual BOOL WriteEndChildRecordsWeb(BaseCamelotFilter* pFilter);
    virtual BOOL WriteEndChildRecordsNative(BaseCamelotFilter* pFilter);

    virtual BOOL ReadPostChildrenWeb(BaseCamelotFilter* pFilter);
    virtual BOOL ReadPostChildrenNative(BaseCamelotFilter* pFilter);

    virtual UINT32 CountNumWritableWebLayers(BaseCamelotFilter* pFilter);

    virtual BOOL WriteAtomicNodesColourRefs (Node* pLayer, BaseCamelotFilter* pFilter);
    virtual PathName MakeExportLayerName(const PathName& path);

// WEBSTER - markn 15/1/97
// Moved CreateGuideLayer() from OpGuideline class
    static Layer* CreateGuideLayer();

public:
    // Frame related functions
    virtual BOOL WriteFrameLayerProperties(BaseCamelotFilter* pFilter);

    DWORD GetFrameDelay();
    void SetFrameDelay(const DWORD& Delay);

    // The quality level that the animation was captured at
    Quality GetCaptureQuality()                             { return m_CaptureQuality; }
    void SetCaptureQuality(const Quality& NewQuality)       { m_CaptureQuality = NewQuality; }

    // Generated Bitmap related functions
    KernelBitmap * GetGeneratedBitmap();
    BOOL SetGeneratedBitmap(KernelBitmap * pBitmap);
    // Overide this so that our bitmaps get included in the counting process
    virtual KernelBitmap * EnumerateBitmaps(UINT32 Count);
    // Referenced Bitmap related functions
    KernelBitmap * GetReferencedBitmap();
    BOOL SetReferencedBitmap(KernelBitmap * pBitmap);

    // Functions for handling child nodes changing inside compound node,
    // We override this so we can mark the layer as edited
    virtual ChangeCode  OnChildChange(ObjChangeParam* pParam);

private: 
    LayerStatus LayerSt;    // All layer info which can be changed by the user in an undoable way

    BOOL Active;        // The active layer is the layer to which new objects get added. A single layer 
                        // within a spread must always be active. 
    BOOL Visible;       // This flag indicates if the layer should be rendered or not 
    BOOL Locked;        // If a layer is locked then it should not be modifiable. i.e the user should 
                        // not be able to change or add new objects to the layer.  
    BOOL Printable;     // Indicates if the layer should be rendered to the printer
    BOOL Background;    // ??? Prints at half tone (or something like this, need to find out !!) 
    BOOL Outline;       // Everything in this layer should be rendered in outlines (i.e. minimum quality)
    BOOL Guide;         // This layer is a Guide layer, and can contain guidelines
    
    BOOL m_PageBackground;  // This layer is the special page background layer and hence contains a
                            // rectangle covering the page(s) of the spread with either a bitmap fill
                            // or a colour applied.
    // Frame related system flags
    BOOL m_Overlay;     // Set if the previous layer is said to overlay the previous one rathar than
                        // obscure it.
    BOOL m_Solid;       // A solid frame/layer is like a background layer in that it forms the background
                        // for frames above it.
    BOOL m_Edited;      // Like the document flag, this says that the layer has been edited and so the
                        // new bitmap frame needs generating.
    BOOL m_Frame;       // This marks this frame as a special GIF animation frame layer.
    BOOL m_HiddenFrame; // This marks this frame as a hidden frame layer which will not be saved into
                        // the GIF animation but may take part in the rendering process of other frames.

    DWORD m_FrameDelay; // The delay value for a GIF animation will be stored in each frame layer.

    Quality         m_CaptureQuality;   // The quality that the frame was captured at
    
    KernelBitmapRef m_GeneratedBitmap;  // The bitmap that has been generated to represent this frame/layer

    KernelBitmap * m_pReferencedBitmap; // If there is a single bitmap on the frame of the correct type
                                        // then this will be used to represent this frame/layer

    DocColour* pGuideColour;
    IndexedColour* pIndexedGuideColour;

    // RGB value of default colour for guide layers
    static INT32 GuideLayerRed;
    static INT32 GuideLayerGreen;
    static INT32 GuideLayerBlue;

    // Message handler that keeps layers up-to-date
    static LayerMsgHandler* pLayerMsgHandler;

protected:              
    virtual Node* SimpleCopy(); 
    void CopyNodeContents(Layer* NodeCopy);
};


/********************************************************************************************

>   class LayerMsgHandler : public MessageHandler

    Author:     Mark_Neves (Xara Group Ltd) <camelotdev@xara.com>
    Created:    10/10/95
    Purpose:    Intercepts messages to ensure that layers are up to date
    
********************************************************************************************/

class LayerMsgHandler : public MessageHandler
{
public:
    CC_DECLARE_DYNAMIC( LayerMsgHandler ) 
    LayerMsgHandler();

protected:
    MsgResult Message(Msg* Msg);
};


#endif // INC_LAYER

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