/**
 * \file insetbranch.C
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Martin Vermeer
 *
 * Full author contact details are available in file CREDITS.
 */

#include <config.h>

#include "insetbranch.h"

#include "buffer.h"
#include "bufferparams.h"
#include "BranchList.h"
#include "cursor.h"
#include "dispatchresult.h"
#include "funcrequest.h"
#include "FuncStatus.h"
#include "gettext.h"
#include "LColor.h"
#include "lyxlex.h"
#include "paragraph.h"

#include <sstream>

using std::string;
using std::auto_ptr;
using std::istringstream;
using std::ostream;
using std::ostringstream;


void InsetBranch::init()
{
	setInsetName("Branch");
	setButtonLabel();
}


InsetBranch::InsetBranch(BufferParams const & bp,
			 InsetBranchParams const & params)
	: InsetCollapsable(bp), params_(params)
{
	init();
}


InsetBranch::InsetBranch(InsetBranch const & in)
	: InsetCollapsable(in), params_(in.params_)
{
	init();
}


InsetBranch::~InsetBranch()
{
	InsetBranchMailer(*this).hideDialog();
}


auto_ptr<InsetBase> InsetBranch::doClone() const
{
	return auto_ptr<InsetBase>(new InsetBranch(*this));
}


string const InsetBranch::editMessage() const
{
	return _("Opened Branch Inset");
}


void InsetBranch::write(Buffer const & buf, ostream & os) const
{
	params_.write(os);
	InsetCollapsable::write(buf, os);
}


void InsetBranch::read(Buffer const & buf, LyXLex & lex)
{
	params_.read(lex);
	InsetCollapsable::read(buf, lex);
	setButtonLabel();
}


void InsetBranch::setButtonLabel()
{
	LyXFont font(LyXFont::ALL_SANE);
	font.decSize();
	font.decSize();

	string s = "Branch: " + params_.branch;
	setLabel(isOpen() ? s : getNewLabel(s) );
	font.setColor(LColor::foreground);
	if (!params_.branch.empty())
		setBackgroundColor(lcolor.getFromLyXName(params_.branch));
	else
		setBackgroundColor(LColor::background);
	setLabelFont(font);
}


bool InsetBranch::showInsetDialog(BufferView * bv) const
{
	InsetBranchMailer(const_cast<InsetBranch &>(*this)).showDialog(bv);
	return true;
}


void InsetBranch::doDispatch(LCursor & cur, FuncRequest & cmd)
{
	switch (cmd.action) {
	case LFUN_INSET_MODIFY: {
		InsetBranchParams params;
		InsetBranchMailer::string2params(cmd.argument, params);
		params_.branch = params.branch;
		setButtonLabel();
		break;
	}

	case LFUN_MOUSE_PRESS:
		if (cmd.button() != mouse_button::button3)
			InsetCollapsable::doDispatch(cur, cmd);
		else
			cur.undispatched();
		break;

	case LFUN_INSET_DIALOG_UPDATE:
		InsetBranchMailer(*this).updateDialog(&cur.bv());
		break;

	case LFUN_MOUSE_RELEASE:
		if (cmd.button() == mouse_button::button3 && hitButton(cmd))
			InsetBranchMailer(*this).showDialog(&cur.bv());
		else
			InsetCollapsable::doDispatch(cur, cmd);
		break;


	case LFUN_INSET_TOGGLE:
		// We assume that this lfun is indeed going to be dispatched.
		cur.dispatched();

		if (cmd.argument == "open")
			setStatus(Open);
		else if (cmd.argument == "close") {
			setStatus(Collapsed);
			cur.leaveInset(*this);
		} else if (cmd.argument == "toggle") {
			if (isOpen()) {
				setStatus(Collapsed);
				cur.leaveInset(*this);
			} else {
				setStatus(Open);
			}

		// The branch inset uses "assign".
		} else if (cmd.argument == "assign" || cmd.argument.empty()) {
			BranchList const & branchlist =
				cur.buffer().params().branchlist();
			if (isBranchSelected(branchlist)) {
				if (status() != Open)
					setStatus(Open);
				else
					cur.undispatched();
			} else {
				if (status() != Collapsed) {
					setStatus(Collapsed);
					cur.leaveInset(*this);
				} else
					cur.undispatched();
			}
		}
		break;

	default:
		InsetCollapsable::doDispatch(cur, cmd);
		break;
	}
}


bool InsetBranch::getStatus(LCursor & cur, FuncRequest const & cmd,
		FuncStatus & flag) const
{
	switch (cmd.action) {
	case LFUN_INSET_MODIFY:
	case LFUN_INSET_DIALOG_UPDATE:
		flag.enabled(true);
		break;

	case LFUN_INSET_TOGGLE:
		if (cmd.argument == "open" || cmd.argument == "close" ||
		    cmd.argument == "toggle")
			flag.enabled(true);
		else if (cmd.argument == "assign" || cmd.argument.empty()) {
			BranchList const & branchlist =
				cur.buffer().params().branchlist();
			if (isBranchSelected(branchlist))
				flag.enabled(status() != Open);
			else
				flag.enabled(status() != Collapsed);
		} else
			flag.enabled(true);
		break;

	default:
		return InsetCollapsable::getStatus(cur, cmd, flag);
	}
	return true;
}


bool InsetBranch::isBranchSelected(BranchList const & branchlist) const
{
	BranchList::const_iterator const end = branchlist.end();
	BranchList::const_iterator it =
		std::find_if(branchlist.begin(), end,
			     BranchNamesEqual(params_.branch));
	if (it == end)
		return false;
	return it->getSelected();
}


int InsetBranch::latex(Buffer const & buf, ostream & os,
		       OutputParams const & runparams) const
{
	return isBranchSelected(buf.params().branchlist()) ?
		InsetText::latex(buf, os, runparams) : 0;
}


int InsetBranch::linuxdoc(Buffer const & buf, std::ostream & os,
			  OutputParams const & runparams) const
{
	return isBranchSelected(buf.params().branchlist()) ?
		InsetText::linuxdoc(buf, os, runparams) : 0;
}


int InsetBranch::docbook(Buffer const & buf, std::ostream & os,
			 OutputParams const & runparams) const
{
	return isBranchSelected(buf.params().branchlist()) ?
		InsetText::docbook(buf, os, runparams) : 0;
}


int InsetBranch::plaintext(Buffer const & buf, std::ostream & os,
			   OutputParams const & runparams) const
{
	return isBranchSelected(buf.params().branchlist()) ?
		InsetText::plaintext(buf, os, runparams): 0;
}


void InsetBranch::validate(LaTeXFeatures & features) const
{
	InsetText::validate(features);
}



string const InsetBranchMailer::name_("branch");

InsetBranchMailer::InsetBranchMailer(InsetBranch & inset)
	: inset_(inset)
{}


string const InsetBranchMailer::inset2string(Buffer const &) const
{
	return params2string(inset_.params());
}


string const InsetBranchMailer::params2string(InsetBranchParams const & params)
{
	ostringstream data;
	data << name_ << ' ';
	params.write(data);
	return data.str();
}


void InsetBranchMailer::string2params(string const & in,
				      InsetBranchParams & params)
{
	params = InsetBranchParams();
	if (in.empty())
		return;

	istringstream data(in);
	LyXLex lex(0,0);
	lex.setStream(data);

	string name;
	lex >> name;
	if (name != name_)
		return print_mailer_error("InsetBranchMailer", in, 1, name_);

	// This is part of the inset proper that is usually swallowed
	// by LyXText::readInset
	string id;
	lex >> id;
	if (!lex || id != "Branch")
		return print_mailer_error("InsetBranchMailer", in, 2, "Branch");

	params.read(lex);
}


void InsetBranchParams::write(ostream & os) const
{
	os << "Branch " << branch << '\n';
}


void InsetBranchParams::read(LyXLex & lex)
{
	lex >> branch;
}