/**
 * \file floatplacement.C
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Edwin Leuven
 * \author John Levon
 *
 * Full author contact details are available in file CREDITS.
 */

#include <config.h>

#include "floatplacement.h"
#include "qt_helpers.h"

#include "insets/insetfloat.h"
#include "support/lstrings.h"

#include <qcheckbox.h>
#include <qlayout.h>
#include <qgroupbox.h>

using lyx::support::contains;

using std::string;


// FIXME: set disabled doesn't work properly
FloatPlacement::FloatPlacement(QWidget * parent, char * name)
	: QWidget(parent, name)
{
	QHBoxLayout * toplayout = new QHBoxLayout(this, 11, 6);
	layout = new QVBoxLayout(0, 0, 6);
	QGroupBox * options = new QGroupBox(qt_("Advanced Placement Options"), this);

	defaultsCB = new QCheckBox(qt_("Use &default placement"), this);
	topCB = new QCheckBox(qt_("&Top of page"), options);
	bottomCB = new QCheckBox(qt_("&Bottom of page"), options);
	pageCB = new QCheckBox(qt_("&Page of floats"), options);
	herepossiblyCB = new QCheckBox(qt_("&Here if possible"), options);
	heredefinitelyCB = new QCheckBox(qt_("Here definitely"), options);
	ignoreCB = new QCheckBox(qt_("&Ignore LaTeX rules"), options);
	spanCB = 0;

	layout->addWidget(defaultsCB);

	QVBoxLayout * optlay = new QVBoxLayout(options, 10, 6);
	optlay->addSpacing(6);
	optlay->addWidget(topCB);
	optlay->addWidget(bottomCB);
	optlay->addWidget(pageCB);
	optlay->addWidget(herepossiblyCB);
	optlay->addWidget(heredefinitelyCB);
	optlay->addWidget(ignoreCB);

	layout->addWidget(options);

	toplayout->addLayout(layout);

	connect(defaultsCB, SIGNAL(toggled(bool)), options, SLOT(setDisabled(bool)));
	connect(defaultsCB, SIGNAL(toggled(bool)), ignoreCB, SLOT(setDisabled(bool)));
	connect(defaultsCB, SIGNAL(toggled(bool)), pageCB, SLOT(setDisabled(bool)));
	connect(defaultsCB, SIGNAL(toggled(bool)), heredefinitelyCB, SLOT(setDisabled(bool)));
	connect(defaultsCB, SIGNAL(toggled(bool)), herepossiblyCB, SLOT(setDisabled(bool)));
	connect(defaultsCB, SIGNAL(toggled(bool)), bottomCB, SLOT(setDisabled(bool)));
	connect(defaultsCB, SIGNAL(toggled(bool)), topCB, SLOT(setDisabled(bool)));

	connect(heredefinitelyCB, SIGNAL(clicked()), this, SLOT(heredefinitelyClicked()));
	connect(topCB, SIGNAL(clicked()), this, SLOT(tbhpClicked()));
	connect(bottomCB, SIGNAL(clicked()), this, SLOT(tbhpClicked()));
	connect(pageCB, SIGNAL(clicked()), this, SLOT(tbhpClicked()));
	connect(herepossiblyCB, SIGNAL(clicked()), this, SLOT(tbhpClicked()));
	connect(defaultsCB, SIGNAL(clicked()), this, SLOT(tbhpClicked()));

	connect(defaultsCB, SIGNAL(toggled(bool)), this, SLOT(changedSlot()));
	connect(ignoreCB, SIGNAL(toggled(bool)), this, SLOT(changedSlot()));
	connect(pageCB, SIGNAL(toggled(bool)), this, SLOT(changedSlot()));
	connect(heredefinitelyCB, SIGNAL(toggled(bool)), this, SLOT(changedSlot()));
	connect(herepossiblyCB, SIGNAL(toggled(bool)), this, SLOT(changedSlot()));
	connect(bottomCB, SIGNAL(toggled(bool)), this, SLOT(changedSlot()));
	connect(topCB, SIGNAL(toggled(bool)), this, SLOT(changedSlot()));
}


void FloatPlacement::useWide()
{
	spanCB = new QCheckBox(qt_("&Span columns"), this);
	layout->addWidget(spanCB);
	setTabOrder(ignoreCB, spanCB);
	connect(spanCB, SIGNAL(clicked()), this, SLOT(spanClicked()));
	connect(spanCB, SIGNAL(toggled(bool)), this, SLOT(changedSlot()));
}


void FloatPlacement::changedSlot()
{
	emit changed();
}


void FloatPlacement::set(string const & placement)
{
	bool def_placement = false;
	bool top = false;
	bool bottom = false;
	bool page = false;
	bool here = false;
	bool force = false;
	bool here_definitely = false;

	if (placement.empty()) {
		def_placement = true;
	} else if (contains(placement, "H")) {
		here_definitely = true;
	} else {
		if (contains(placement, "!")) {
			force = true;
		}
		if (contains(placement, "t")) {
			top = true;
		}
		if (contains(placement, "b")) {
			bottom = true;
		}
		if (contains(placement, "p")) {
			page = true;
		}
		if (contains(placement, "h")) {
			here = true;
		}
	}

	defaultsCB->setChecked(def_placement);
	topCB->setChecked(top);
	bottomCB->setChecked(bottom);
	pageCB->setChecked(page);
	herepossiblyCB->setChecked(here);
	ignoreCB->setChecked(force);
	ignoreCB->setEnabled(top || bottom || page || here);
	heredefinitelyCB->setChecked(here_definitely);
}


void FloatPlacement::set(InsetFloatParams const & params)
{
	set(params.placement);

	if (params.wide) {
		herepossiblyCB->setChecked(false);
		bottomCB->setChecked(false);
	}

	spanCB->setChecked(params.wide);
}


string const FloatPlacement::get(bool & wide) const
{
	wide = spanCB->isChecked();

	return get();
}


string const FloatPlacement::get() const
{
	string placement;

	if (defaultsCB->isChecked())
		return placement;

	if (heredefinitelyCB->isChecked()) {
		placement += 'H';
	} else {
		if (ignoreCB->isChecked()) {
			placement += '!';
		}
		if (topCB->isChecked()) {
			placement += 't';
		}
		if (bottomCB->isChecked()) {
			placement += 'b';
		}
		if (pageCB->isChecked()) {
			placement += 'p';
		}
		if (herepossiblyCB->isChecked()) {
			placement += 'h';
		}
	}
	return placement;
}


void FloatPlacement::tbhpClicked()
{
	heredefinitelyCB->setChecked(false);
	bool allow(topCB->isChecked());
	allow |= bottomCB->isChecked();
	allow |= pageCB->isChecked();
	allow |= herepossiblyCB->isChecked();
	ignoreCB->setEnabled(allow);
}


void FloatPlacement::heredefinitelyClicked()
{
	if (heredefinitelyCB->isChecked());
		ignoreCB->setEnabled(false);

	topCB->setChecked(false);
	bottomCB->setChecked(false);
	pageCB->setChecked(false);
	herepossiblyCB->setChecked(false);
	ignoreCB->setChecked(false);
}


void FloatPlacement::spanClicked()
{
	bool const span(spanCB->isChecked());

	if (!defaultsCB->isChecked()) {
		herepossiblyCB->setEnabled(!span);
		heredefinitelyCB->setEnabled(!span);
	}

	if (!span)
		return;

	herepossiblyCB->setChecked(false);
	heredefinitelyCB->setChecked(false);
}