/*
 * FormToc.C
 * (C) 2000 LyX Team
 * John Levon, moz@compsoc.man.ac.uk
 */
 
/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include <config.h>

#include "formtocdialog.h"
 
#include "Dialogs.h"
#include "FormToc.h"
#include "gettext.h"
#include "buffer.h"
#include "support/lstrings.h"
#include "QtLyXView.h"
#include "lyxfunc.h" 
#include "debug.h" 

using std::vector;
using std::pair;
 
FormToc::FormToc(LyXView *v, Dialogs *d)
	: dialog_(0), lv_(v), d_(d), inset_(0), h_(0), u_(0), ih_(0),
	toclist(0), type(Buffer::TOC_TOC)
{
	// let the dialog be shown
	// This is a permanent connection so we won't bother
	// storing a copy because we won't be disconnecting.
	d->showTOC.connect(slot(this, &FormToc::showTOC));
	d->createTOC.connect(slot(this, &FormToc::createTOC));
}

FormToc::~FormToc()
{
	delete dialog_;
}

void FormToc::showTOC(InsetCommand * const inset)
{
	// FIXME: when could inset be 0 here ?
	if (inset==0)
		return;

	inset_ = inset;
	ih_ = inset_->hide.connect(slot(this,&FormToc::hide));
	params = inset->params();
	
	show();
}
 
void FormToc::createTOC(string const & arg)
{
	if (inset_)
		close();
 
	params.setFromString(arg);
	show();
}
 
void FormToc::updateToc()
{
	if (!lv_->view()->available()) {
		toclist.clear();
		dialog_->tree->clear();
		return;
	}

	vector< vector<Buffer::TocItem> > tmp =
		lv_->view()->buffer()->getTocList();

	// Check if all elements are the same.
	if (toclist.size() == tmp[type].size()) {
		unsigned int i = 0;
		for (; i < toclist.size(); ++i) {
			if (toclist[i] !=  tmp[type][i])
				break;
		}
		if (i >= toclist.size()) 
			return;
	}
 
	toclist = tmp[type];

	dialog_->tree->clear();

	 
	// FIXME: should do hierarchically. at each point we need to know
	// id of item we've just inserted, id of most recent sibling, and
	// id of parent
 
	dialog_->tree->setAutoUpdate(false);
	for (vector< Buffer::TocItem >::const_iterator iter = toclist.begin();
		iter != toclist.end(); ++iter) {
		dialog_->tree->insertItem((string(4*(*iter).depth,' ')+(*iter).str).c_str(), 0, -1, false);
	}
	dialog_->tree->setAutoUpdate(true);
	dialog_->tree->update();
}
 
void FormToc::setType(Buffer::TocType toctype)
{
	type = toctype;
	switch (type) {
		case Buffer::TOC_TOC:
			dialog_->setCaption(_("Table of Contents"));
			break; 
		case Buffer::TOC_LOF:
			dialog_->setCaption(_("List of Figures"));
			break; 
		case Buffer::TOC_LOT:
			dialog_->setCaption(_("List of Tables"));
			break; 
		case Buffer::TOC_LOA:
			dialog_->setCaption(_("List of Algorithms"));
			break; 
	}
}
 
void FormToc::update()
{
	if (params.getCmdName()=="tableofcontents") {
		setType(Buffer::TOC_TOC);
		dialog_->menu->setCurrentItem(0);
	} else if (params.getCmdName()=="listoffigures") {
		setType(Buffer::TOC_LOF); 
		dialog_->menu->setCurrentItem(1); 
	} else if (params.getCmdName()=="listoftables") {
		setType(Buffer::TOC_LOT); 
		dialog_->menu->setCurrentItem(2); 
	} else {
		setType(Buffer::TOC_LOA); 
		dialog_->menu->setCurrentItem(3); 
	} 

	updateToc();
}
 
void FormToc::highlight(int index)
{
	if (!lv_->view()->available())
		return;
 
	// FIXME: frontStrip can go once it's hierarchical
	string tmp(frontStrip(dialog_->tree->itemAt(index)->getText(),' '));
 
	vector <Buffer::TocItem>::const_iterator iter = toclist.begin();
	for (; iter != toclist.end(); ++iter) {
		if (iter->str==tmp)
			break;
	} 
	
	if (iter==toclist.end()) {
		lyxerr[Debug::GUI] << "Couldn't find highlighted TOC entry : " << tmp << endl;
		return;
	}

	lv_->getLyXFunc()->Dispatch(LFUN_GOTO_PARAGRAPH, tostr(iter->par->id()).c_str());
}
 
void FormToc::set_type(Buffer::TocType toctype)
{
	if (toctype==type)
		return;

	setType(toctype);
	updateToc();
}
 
void FormToc::show()
{
	if (!dialog_)
		dialog_ = new FormTocDialog(this, 0, _("LyX: Table of Contents"), false);
 
	if (!dialog_->isVisible()) {
		h_ = d_->hideBufferDependent.connect(slot(this, &FormToc::hide));
		u_ = d_->updateBufferDependent.connect(slot(this, &FormToc::update));
	}

	dialog_->raise();
	dialog_->setActiveWindow();
 
	update();
	dialog_->show();
}

void FormToc::close()
{
	h_.disconnect();
	u_.disconnect();
	ih_.disconnect();
	inset_ = 0;
}
 
void FormToc::hide()
{
	dialog_->hide();
	close();
}