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

#include <config.h>
#include <gtkmm.h>

#include "GToolbar.h"
#include "GView.h"

#include "buffer.h"
#include "bufferparams.h"
#include "debug.h"
#include "funcrequest.h"
#include "FuncStatus.h"
#include "lyxfunc.h"

using std::string;


namespace {

GView::Position getPosition(ToolbarBackend::Flags const & flags)
{
	if (flags & ToolbarBackend::TOP)
		return GView::Top;
	if (flags & ToolbarBackend::BOTTOM)
		return GView::Bottom;
	if (flags & ToolbarBackend::LEFT)
		return GView::Left;
	if (flags & ToolbarBackend::RIGHT)
		return GView::Right;
	return GView::Top;
}


LyXTextClass const & getTextClass(LyXView const & lv)
{
	return lv.buffer()->params().getLyXTextClass();
}


void comboClear(Gtk::Combo & combo)
{
	std::vector<Glib::ustring> strings;
	strings.push_back("");
	combo.set_popdown_strings(strings);
}


bool comboIsEmpty(Gtk::Combo & combo)
{
	std::vector<Glib::ustring> strings = combo.get_popdown_strings();
	return (strings.empty() || (strings.size() == 1 && strings[0] == ""));
}

char const * gToolData = "tool_data";

} // namespace anon


GLayoutBox::GLayoutBox(LyXView & owner,
		       Gtk::Toolbar & toolbar,
		       FuncRequest const & func)
	: owner_(owner),
	  internal_(false)
{
 	combo_.set_value_in_list();
 	combo_.get_entry()->set_editable(false);
 	combo_.unset_flags(Gtk::CAN_FOCUS | Gtk::CAN_DEFAULT);
 	combo_.get_entry()->unset_flags(Gtk::CAN_FOCUS | Gtk::CAN_DEFAULT);
 	comboClear(combo_);

 	combo_.get_entry()->signal_changed().connect(
 		SigC::slot(*this,
			   &GLayoutBox::selected));

	combo_.show();
	toolbar.tools().push_back(Gtk::Toolbar_Helpers::Element(combo_));
	toolbar.tools().back().get_widget()->set_data(
		gToolData,
		reinterpret_cast<void*>(&const_cast<FuncRequest &>(func)));
}


void GLayoutBox::set(string const & layout)
{
	LyXTextClass const & tc = getTextClass(owner_);

	internal_ = true;
	combo_.get_entry()->set_text(tc[layout]->name());
	internal_ = false;
}


void GLayoutBox::update()
{
	LyXTextClass const & tc = getTextClass(owner_);

	std::vector<Glib::ustring> strings;

	LyXTextClass::const_iterator it = tc.begin();
	LyXTextClass::const_iterator const end = tc.end();
 	for (; it != end; ++it)
		if ((*it)->obsoleted_by().empty())
			strings.push_back(
				Glib::locale_to_utf8((*it)->name()));
	internal_ = true;
	combo_.set_popdown_strings(strings);
	internal_ = false;
}


void GLayoutBox::clear()
{
	internal_ = true;
	comboClear(combo_);
	internal_ = false;
}


void GLayoutBox::open()
{
	combo_.get_list()->activate();
}


void GLayoutBox::setEnabled(bool sensitive)
{
	combo_.set_sensitive(sensitive);
}


void GLayoutBox::selected()
{
	if (internal_)
		return;

	string layoutGuiName = combo_.get_entry()->get_text();
	// we get two signal, one of it is empty and useless
	if (layoutGuiName.empty())
		return;
	LyXTextClass const & tc = getTextClass(owner_);

	LyXTextClass::const_iterator it = tc.begin();
	LyXTextClass::const_iterator const end = tc.end();
	for (; it != end; ++it) {
		string const & name = (*it)->name();
		if (name == layoutGuiName) {
			owner_.getLyXFunc().dispatch(
				FuncRequest(LFUN_LAYOUT, name),
				true);
			return;
		}
	}
	lyxerr << "ERROR (GLayoutBox::selected): layout not found! name: "
	       << layoutGuiName << std::endl;
}


Toolbars::ToolbarPtr make_toolbar(ToolbarBackend::Toolbar const & tbb,
				  LyXView & owner)
{
	return Toolbars::ToolbarPtr(new GToolbar(tbb, owner));
}


GToolbar::GToolbar(ToolbarBackend::Toolbar const & tbb, LyXView & owner)
	: owner_(dynamic_cast<GView &>(owner))
{
	ToolbarBackend::item_iterator it = tbb.items.begin();
	ToolbarBackend::item_iterator end = tbb.items.end();
	for (; it != end; ++it)
		add(it->first, it->second);

	toolbar_.set_toolbar_style(Gtk::TOOLBAR_ICONS);

	GView::Position const position = getPosition(tbb.flags);

	if (position == GView::Left || position == GView::Right)
		toolbar_.set_orientation(Gtk::ORIENTATION_VERTICAL);

	owner_.getBox(position).children().push_back(
		Gtk::Box_Helpers::Element(toolbar_, Gtk::PACK_SHRINK));
}


void GToolbar::add(FuncRequest const & func, string const & tooltip)
{
 	switch (func.action) {
 	case ToolbarBackend::SEPARATOR:
		toolbar_.tools().push_back(Gtk::Toolbar_Helpers::Space());
 		break;
 	case ToolbarBackend::MINIBUFFER:
 		// Not supported yet.
 		break;
 	case ToolbarBackend::LAYOUTS:
 	{
		layout_.reset(new GLayoutBox(owner_, toolbar_, func));
 		break;
 	}
 	default:
		Glib::ustring xpmName =
			Glib::locale_to_utf8(toolbarbackend.getIcon(func));
		Glib::ustring tip = Glib::locale_to_utf8(tooltip);
		if (xpmName.size() == 0) {
			toolbar_.tools().push_back(
				Gtk::Toolbar_Helpers::ButtonElem(
					"",
					SigC::bind(SigC::slot(*this, &GToolbar::clicked),
						   FuncRequest(func)),
					tip));
		} else {
			Gtk::Image * image =
				Gtk::manage(new Gtk::Image(xpmName));
			image->show();
			toolbar_.tools().push_back(
				Gtk::Toolbar_Helpers::ButtonElem(
					"",
					*image,
					SigC::bind(SigC::slot(*this, &GToolbar::clicked),
						   FuncRequest(func)),
					tip));
		}
		toolbar_.tools().back().get_content()->set_data(
			gToolData,
			reinterpret_cast<void*>(&const_cast<FuncRequest &>(func)));
		break;
	}
}


void GToolbar::clicked(FuncRequest func)
{
	owner_.getLyXFunc().dispatch(func, true);
}


void GToolbar::hide(bool)
{
	toolbar_.hide();
}


void GToolbar::show(bool)
{
	toolbar_.show();
}


void GToolbar::update()
{
	Gtk::Toolbar_Helpers::ToolList::iterator it =
		toolbar_.tools().begin();
	Gtk::Toolbar_Helpers::ToolList::iterator const end =
		toolbar_.tools().end();

	for (; it != end; ++it) {
		Gtk::Widget * widget;
		switch (it->get_type()) {
		case Gtk::TOOLBAR_CHILD_WIDGET:
			widget = it->get_widget();
			break;
		case Gtk::TOOLBAR_CHILD_SPACE:
			continue;
		default:
			widget = it->get_content();
 		}

		FuncRequest const & func = *reinterpret_cast<FuncRequest *>(
			widget->get_data(gToolData));

		if (func.action == int(ToolbarBackend::LAYOUTS))
			continue;

		FuncStatus const status = owner_.getLyXFunc().getStatus(func);
		bool sensitive = status.enabled();
		widget->set_sensitive(sensitive);
		if (it->get_type() != Gtk::TOOLBAR_CHILD_BUTTON)
			return;
		if (status.onoff(true))
			static_cast<Gtk::Button*>(widget)->
				set_relief(Gtk::RELIEF_NORMAL);
		if (status.onoff(false))
			static_cast<Gtk::Button*>(widget)->
				set_relief(Gtk::RELIEF_NONE);
	}
}