lyx_mirror/src/insets/insettext.h

// -*- C++ -*-
/* This file is part of
 * ======================================================
 * 
 *           LyX, The Document Processor
 *
 *           Copyright 1998 The LyX Team.
 *
 *======================================================
 */
// The pristine updatable inset: Text


#ifndef INSETTEXT_H
#define INSETTEXT_H

#ifdef __GNUG__
#pragma interface
#endif

#include "lyxinset.h"
#include "LString.h"
#include "lyxcursor.h"

class Painter;
class BufferView;
class Buffer;
class LyXCursor;
class LyXParagraph;
class LColor;
class LyXText;
class LyXScreen;

/**
 * A text inset is like a TeX box to write full text
 * (including styles and other insets) in a given space. 
 */
class InsetText : public UpdatableInset {
public:
    ///
    enum UpdateCodes {
	NONE = 0,
	INIT,
	FULL,
	CURSOR_PAR,
	CURSOR,
	SELECTION,
	DRAW_FRAME,
	CLEAR_FRAME
    };
    ///
    enum DrawFrame {
	NEVER = 0,
	LOCKED,
	ALWAYS
    };
    ///
    InsetText();
    ///
    explicit
    InsetText(InsetText const &);
    ///
    ~InsetText();
    ///
    Inset * Clone() const;
    ///
    InsetText & operator= (InsetText const & it);
    ///
    void clear();
    ///
    void Read(Buffer const *, LyXLex &);
    ///
    void Write(Buffer const *, std::ostream &) const;
    ///
    int ascent(BufferView *, LyXFont const &) const;
    ///
    int descent(BufferView *, LyXFont const &) const;
    ///
    int width(BufferView *, LyXFont const & f) const;
    ///
    int textWidth(Painter &) const;
    ///
    void draw(BufferView *, LyXFont const &, int , float &, bool) const;
    ///
    void update(BufferView *, LyXFont const &, bool =false);
    ///
    char const * EditMessage() const;
    ///
    void Edit(BufferView *, int, int, unsigned int);
    ///
    bool IsTextInset() const { return true; }
    ///
    bool doClearArea() const { return !locked; }
    ///
    void InsetUnlock(BufferView *);
    ///
    bool LockInsetInInset(BufferView *, UpdatableInset *);
    ///
    bool UnlockInsetInInset(BufferView *, UpdatableInset *, bool lr = false);
    ///
    bool UpdateInsetInInset(BufferView *, Inset *);
    ///
    void InsetButtonRelease(BufferView *, int, int, int);
    ///
    void InsetButtonPress(BufferView *, int, int, int);
    ///
    void InsetMotionNotify(BufferView *, int, int, int);
    ///
    void InsetKeyPress(XKeyEvent *);
    ///
    UpdatableInset::RESULT LocalDispatch(BufferView *, int, string const &);
    ///
    int Latex(Buffer const *, std::ostream &, bool fragile, bool free_spc) const;
    ///
    int Ascii(Buffer const *, std::ostream &) const { return 0; }
    ///
    int Linuxdoc(Buffer const *, std::ostream &) const { return 0; }
    ///
    int DocBook(Buffer const *, std::ostream &) const { return 0; }
    ///
    void Validate(LaTeXFeatures & features) const;
    ///
    Inset::Code LyxCode() const { return Inset::TEXT_CODE; }
    ///
    void GetCursorPos(BufferView *, int & x, int & y) const;
    ///
    int InsetInInsetY();
    ///
    void ToggleInsetCursor(BufferView *);
    ///
    bool InsertInset(BufferView *, Inset *);
    ///
    UpdatableInset * GetLockingInset();
    ///
    UpdatableInset * GetFirstLockingInsetOfType(Inset::Code);
    ///
    void SetFont(BufferView *, LyXFont const &, bool toggleall = false);
    ///
    int getMaxWidth(Painter &, UpdatableInset const *) const;
    ///
    void init(InsetText const * ins = 0);
    ///
    void WriteParagraphData(Buffer const *, std::ostream &) const;
    ///
    void SetParagraphData(LyXParagraph *);
    ///
    void SetAutoBreakRows(bool);
    ///
    void SetDrawFrame(BufferView *, DrawFrame);
    ///
    void SetFrameColor(BufferView *, LColor::color);
    ///
//    LyXFont GetDrawFont(BufferView *, LyXParagraph *, int pos) const;
    ///
    LyXText * getLyXText(BufferView *) const;
    void deleteLyXText(BufferView *, bool recursive=true) const;
    void resizeLyXText(BufferView *) const;

    LyXParagraph * par;
    ///
    mutable UpdateCodes need_update;

protected:
    ///
    void UpdateLocal(BufferView *, UpdateCodes, bool mark_dirty);

    mutable int drawTextXOffset;
    mutable int drawTextYOffset;
    ///
    bool autoBreakRows;
    DrawFrame drawFrame;
    ///
    LColor::color frame_color;

private:
    ///
    typedef std::map<BufferView *, LyXText *> Cache;
    ///
    typedef Cache::value_type value_type;
    ///
    int BeginningOfMainBody(Buffer const *, LyXParagraph * par) const;
    ///
    void ShowInsetCursor(BufferView *);
    ///
    void HideInsetCursor(BufferView *);
    ///
    UpdatableInset::RESULT moveRight(BufferView *, bool activate_inset = true);
    ///
    UpdatableInset::RESULT moveLeft(BufferView *, bool activate_inset = true);
    ///
    UpdatableInset::RESULT moveUp(BufferView *);
    ///
    UpdatableInset::RESULT moveDown(BufferView *);
    ///
    void SetCharFont(Buffer const *, int pos, LyXFont const & font);
    ///
    string getText(int);
    ///
    bool checkAndActivateInset(BufferView * bv, bool behind);
    bool checkAndActivateInset(BufferView * bv, int x = 0, int y = 0,
			       int button = 0);
    ///
    int cx(BufferView *) const;
    int cy(BufferView *) const;
    int cpos(BufferView *) const;
    LyXParagraph * cpar(BufferView *) const;
    Row * crow(BufferView *) const;

    /// This instead of a macro
    LyXText * TEXT(BufferView * bv) const {
	return getLyXText(bv);
    }
	
    /* Private structures and variables */
    ///
    mutable bool locked;
    ///
    mutable int insetAscent;
    mutable int insetDescent;
    mutable int insetWidth;
    mutable int last_width;
    mutable int last_height;
    mutable int top_y;
    ///
    LyXParagraph * inset_par;
    ///
    int inset_pos;
    ///
    mutable int inset_x;
    ///
    mutable int inset_y;
    ///
    int interline_space;
    ///
    bool no_selection;
    ///
    mutable float xpos;
    ///
    UpdatableInset * the_locking_inset;
    ///
    LyXParagraph * old_par;
    /// The cache.
    mutable Cache cache;
};
#endif