/* This file is part of
 * ====================================================== 
 * 
 *           LyX, The Document Processor
 * 	 
 *	    Copyright 1995 Matthias Ettrich
 *          Copyright 1995-2000 The LyX Team.
 *
 * ====================================================== */

#include <config.h>

#ifdef __GNUG__
#pragma implementation "lyxinset.h"
#endif

#include "lyxinset.h"
#include "debug.h"
#include "BufferView.h"
#include "support/lstrings.h"
#include "Painter.h"
#include "commandtags.h"
#include "support/lstrings.h"

using std::endl;

/* Insets default methods */

bool Inset::Deletable() const
{
    return true;
}


bool Inset::DirectWrite() const
{
    return false;
}


Inset::EDITABLE Inset::Editable() const
{
    return NOT_EDITABLE;
}


void Inset::Validate(LaTeXFeatures &) const
{
}


bool Inset::AutoDelete() const
{
    return false;
}


void Inset::Edit(BufferView *, int, int, unsigned int)
{
}


LyXFont const Inset::ConvertFont(LyXFont const & font) const
{
    return LyXFont(font);
}


string const Inset::EditMessage() const 
{
    return _("Opened inset");
}


LyXText * Inset::getLyXText(BufferView const * bv) const
{
    if (owner())
	    return owner()->getLyXText(bv);
    else
	    return bv->text;
}


 /* some stuff for inset locking */

void UpdatableInset::InsetButtonPress(BufferView *, int x, int y, int button)
{
    lyxerr.debug() << "Inset Button Press x=" << x
		   << ", y=" << y << ", button=" << button << endl;
}


void UpdatableInset::InsetButtonRelease(BufferView *, int x, int y, int button)
{
    lyxerr.debug() << "Inset Button Release x=" << x
		   << ", y=" << y << ", button=" << button << endl;
}


void UpdatableInset::InsetKeyPress(XKeyEvent *)
{
    lyxerr.debug() << "Inset Keypress" << endl;
}


void UpdatableInset::InsetMotionNotify(BufferView *, int x, int y, int state)
{
    lyxerr.debug() << "Inset Motion Notify x=" << x
		   << ", y=" << y << ", state=" << state << endl;
}


void UpdatableInset::InsetUnlock(BufferView *)
{
    lyxerr.debug() << "Inset Unlock" << endl;
}


// An updatable inset is highly editable by definition
Inset::EDITABLE UpdatableInset::Editable() const
{
    return HIGHLY_EDITABLE;
}


void UpdatableInset::ToggleInsetCursor(BufferView *)
{
}


void UpdatableInset::ShowInsetCursor(BufferView *, bool)
{
}


void UpdatableInset::HideInsetCursor(BufferView *)
{
}


void UpdatableInset::Edit(BufferView *, int, int, unsigned int)
{
}


void UpdatableInset::draw(BufferView *, LyXFont const &,
			  int /* baseline */, float & x, bool/*cleared*/) const
{
    x += float(scx);
// ATTENTION: don't do the following here!!!
//    top_x = int(x);
//    top_baseline = baseline;
}


void UpdatableInset::SetFont(BufferView *, LyXFont const &, bool )
{
}


void UpdatableInset::scroll(BufferView * bv, float s) const
{
    LyXFont font;

    if (!s) {
	scx = 0;
	return;
    }
    if (((top_x - scx) > 0) && 
	(top_x - scx + width(bv, font)) < bv->workWidth())
	return;
    if ((s > 0) && (top_x > 0))
	return;

//    int mx_scx=abs((width(bv,font) - bv->workWidth())/2);
    int save_scx = scx;
    
    scx = int(s*bv->workWidth()/2);
//    if (!display())
//	scx += 20;

    if ((top_x - save_scx + scx + width(bv, font)) < (bv->workWidth()/2)) {
	scx += (bv->workWidth()/2) - (top_x - save_scx + scx + width(bv,font));
    }
//    bv->updateInset(const_cast<UpdatableInset *>(this), false);
}

void UpdatableInset::scroll(BufferView * bv, int offset) const
{
    if (offset > 0) {
	if (!scx && top_x >= 20)
	    return;
	if ((top_x + offset) > 20)
	    scx = 0;
//	    scx += offset - (top_x - scx + offset - 20);
	else
	    scx += offset;
    } else {
	LyXFont font;
	if (!scx && (top_x+width(bv, font)) < (bv->workWidth()-20))
	    return;
	if ((top_x - scx + offset + width(bv,font)) < (bv->workWidth()-20)) {
	    scx = bv->workWidth() - width(bv,font) - top_x + scx - 20; 
	} else {
	    scx += offset;
	}
    }
//    bv->updateInset(const_cast<UpdatableInset *>(this), false);
}

///  An updatable inset could handle lyx editing commands
UpdatableInset::RESULT
UpdatableInset::LocalDispatch(BufferView * bv, 
			      int action, string const & arg) 
{
    if (!arg.empty() && (action==LFUN_SCROLL_INSET)) {
	if (arg.find('.') != arg.npos) {
	    float xx = static_cast<float>(strToDbl(arg));
	    scroll(bv, xx);
	} else {
	    int xx = strToInt(arg);
	    scroll(bv, xx);
	}
	bv->updateInset(this, false);
	
	return DISPATCHED;
    }
    return UNDISPATCHED; 
}


int UpdatableInset::getMaxWidth(Painter & pain, UpdatableInset const *) const
{
    if (owner())
        return static_cast<UpdatableInset*>(owner())->getMaxWidth(pain, this);
    return pain.paperWidth();
}