tb_widgets_reader.h

// ================================================================================
// ==      This file is a part of Turbo Badger. (C) 2011-2014, Emil Segerås      ==
// ==                     See tb_core.h for more information.                    ==
// ================================================================================

#ifndef TBWIDGETS_READER_H
#define TBWIDGETS_READER_H

#include "tb_linklist.h"
#include "tb_widgets.h"
#include <iostream>

namespace tb {

class TBWidgetsReader;
class TBWidgetFactory;
class TBWidget;
class TBNode;

struct INFLATE_INFO {
    INFLATE_INFO(TBWidgetsReader *reader, TBWidget *target, TBNode *node, TBValue::TYPE sync_type)
        : reader(reader), target(target), node(node) , sync_type(sync_type) {}
    TBWidgetsReader *reader;

    TBWidget *target;
    TBNode *node;
    TBValue::TYPE sync_type;
};

class TBWidgetFactory : public TBLinkOf<TBWidgetFactory>
{
public:
    TBWidgetFactory(const char *name, TBValue::TYPE s);

    virtual TBWidget *Create(INFLATE_INFO *info) = 0;

    void Register();
public:
    const char *name;
    TBValue::TYPE sync_type;
    TBWidgetFactory *next_registered_wf;
};

#define TB_WIDGET_FACTORY(classname, sync_type, add_child_z)            \
    class classname##WidgetFactory : public TBWidgetFactory             \
    {                                                                   \
    public:                                                             \
        classname##WidgetFactory()                                      \
            : TBWidgetFactory(#classname, sync_type) { Register(); }    \
        virtual TBWidget *Create(INFLATE_INFO *info)                    \
        {                                                               \
            classname *widget = new classname();                        \
            if (widget) {                                               \
                if (widget->m_sync_type != sync_type) std::cerr << #classname "ERROR\n"; \
                widget->GetContentRoot()->SetZInflate(add_child_z);     \
                ReadCustomProps(widget, info);                          \
            }                                                           \
            return widget;                                              \
        }                                                               \
        void ReadCustomProps(classname *widget, INFLATE_INFO *info);    \
    };                                                                  \
    static classname##WidgetFactory classname##_wf;                     \
    void classname##WidgetFactory::ReadCustomProps(classname *widget, INFLATE_INFO *info)

class TBWidgetsReader
{
public:
    static TBWidgetsReader *Create();
    ~TBWidgetsReader();

    bool AddFactory(TBWidgetFactory *wf) { factories.AddLast(wf); return true; }
    void RemoveFactory(TBWidgetFactory *wf) { factories.Remove(wf); }

    static void SetIDFromNode(TBID &id, TBNode *node);

    bool LoadFile(TBWidget *target, const TBStr & filename);
    bool LoadFormatted(TBWidget *target, const char *format, ...) TB_POST_FORMAT(3,4);
    bool LoadData(TBWidget *target, const char *data);
    bool LoadData(TBWidget *target, const char *data, int data_len);
    void LoadNodeTree(TBWidget *target, TBNode *node);

    bool DumpFile(TBWidget *source, const TBStr & filename);
    bool DumpData(TBWidget *source, TBStr & data);

private:
    bool Init();
    bool CreateWidget(TBWidget *target, TBNode *node);
    bool CreateNode(TBNode *target, TBWidget *widget);
    TBLinkListOf<TBWidgetFactory> factories;
};

} // namespace tb

#endif // TBWIDGETS_READER_H