/**
 * \file xforms/Toolbar_pimpl.C
 * Copyright 1995 Matthias Ettrich
 * Copyright 1996-1998 Lars Gullik Bjønnes
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Lars Gullik Bjønnes
 *
 * Full author contact details are available in file CREDITS
 */

//  Added pseudo-action handling, asierra 180296

#include <config.h>


#include "Toolbar_pimpl.h"
#include "debug.h"
#include "XFormsView.h"
#include "lyxfunc.h"
#include "FuncStatus.h"
#include "buffer.h"
#include "funcrequest.h"
#include "gettext.h"
#include "Tooltips.h"
#include FORMS_H_LOCATION
#include "combox.h"
#include "ToolbarBackend.h"
#include "xforms_helpers.h"

#include "LyXAction.h"

#include "support/LAssert.h"
#include "support/filetools.h"
#include "support/lstrings.h"

using std::endl;

// some constants
const int standardspacing = 2; // the usual space between items
const int sepspace = 6; // extra space
const int buttonwidth = 30; // the standard button width
const int height = 30; // the height of all items in the toolbar

Toolbar::Pimpl::toolbarItem::toolbarItem()
	: action(LFUN_NOACTION), icon(0)
{}


Toolbar::Pimpl::toolbarItem::~toolbarItem()
{
	// Lars said here that ~XFormsView() dealt with the icons.
	// This is not true. But enabling this causes crashes,
	// because somehow we kill the same icon twice :(
	// FIXME
	//kill_icon();
}


void Toolbar::Pimpl::toolbarItem::kill_icon()
{
	if (icon) {
		fl_delete_object(icon);
		fl_free_object(icon);
		icon = 0;
	}
}


Toolbar::Pimpl::toolbarItem &
Toolbar::Pimpl::toolbarItem::operator=(toolbarItem const & ti)
{
	if (this == &ti)
		return *this;

	// If we already have an icon, release it.
	// But we don't copy the icon from ti
	kill_icon();

	action = ti.action;

	return *this;
}



Toolbar::Pimpl::Pimpl(LyXView * o, int x, int y)
	: owner_(static_cast<XFormsView *>(o)), combox_(0), xpos(x), ypos(y)
{
	tooltip_ = new Tooltips();
}


Toolbar::Pimpl::~Pimpl()
{
	fl_freeze_form(owner_->getForm());

	// G++ vector does not have clear defined
	//toollist.clear();
	toollist_.erase(toollist_.begin(), toollist_.end());

	fl_unfreeze_form(owner_->getForm());
	delete tooltip_;
}


void Toolbar::Pimpl::update()
{
	ToolbarList::const_iterator p = toollist_.begin();
	ToolbarList::const_iterator end = toollist_.end();
	for (; p != end; ++p) {
		if (p->action == ToolbarBackend::LAYOUTS && combox_) {
			LyXFunc const & lf = owner_->getLyXFunc();
			bool const disable =
				lf.getStatus(LFUN_LAYOUT).disabled();
			setEnabled(combox_, !disable);
			continue;
		}

		if (!p->icon)
			continue;

		FuncStatus const status = owner_->getLyXFunc().getStatus(p->action);
		if (status.onoff(true)) {
			// I'd like to use a different color
			// here, but then the problem is to
			// know how to use transparency with
			// Xpm library. It seems pretty
			// complicated to me (JMarc)
			fl_set_object_color(p->icon, FL_LEFT_BCOL, FL_BLUE);
			fl_set_object_boxtype(p->icon, FL_DOWN_BOX);
		} else {
			fl_set_object_color(p->icon, FL_MCOL, FL_BLUE);
			fl_set_object_boxtype(p->icon, FL_UP_BOX);
		}
		if (status.disabled()) {
			// Is there a way here to specify a
			// mask in order to show that the
			// button is disabled? (JMarc)
			fl_deactivate_object(p->icon);
		}
		else
			fl_activate_object(p->icon);
	}
}


namespace {

void C_layoutSelectedCB(FL_OBJECT * ob, long)
{
	if (!ob || !ob->u_vdata)
		return;
	Toolbar::Pimpl * ptr = static_cast<Toolbar::Pimpl *>(ob->u_vdata);
	ptr->layoutSelected();
}

} // namespace anon


void Toolbar::Pimpl::layoutSelected()
{
	if (!combox_)
		return;

	string const & layoutguiname = getString(combox_);
	LyXTextClass const & tc =
		owner_->buffer()->params.getLyXTextClass();

	LyXTextClass::const_iterator end = tc.end();
	for (LyXTextClass::const_iterator cit = tc.begin();
	     cit != end; ++cit) {
		if (_((*cit)->name()) == layoutguiname) {
			owner_->getLyXFunc().dispatch(FuncRequest(LFUN_LAYOUT, (*cit)->name()), true);
			return;
		}
	}
	lyxerr << "ERROR (Toolbar::Pimpl::layoutSelected): layout not found!"
	       << endl;
}


void Toolbar::Pimpl::setLayout(string const & layout)
{
	if (!combox_)
		return;

	LyXTextClass const & tc = owner_->buffer()->params.getLyXTextClass();
	string const layoutname = _(tc[layout]->name());

	int const nnames = fl_get_combox_maxitems(combox_);
	for (int i = 1; i <= nnames; ++i) {
		string const name = fl_get_combox_line(combox_, i);
		if (name == layoutname) {
			fl_set_combox(combox_, i);
			break;
		}
	}
}


void Toolbar::Pimpl::updateLayoutList(bool force)
{
	if (!combox_)
		return;

	// If textclass is different, we need to update the list
	if (fl_get_combox_maxitems(combox_) == 0 || force) {
		fl_clear_combox(combox_);
		LyXTextClass const & tc =
			owner_->buffer()->params.getLyXTextClass();
		LyXTextClass::const_iterator end = tc.end();
		for (LyXTextClass::const_iterator cit = tc.begin();
		     cit != end; ++cit) {
			// ignore obsolete entries
			if ((*cit)->obsoleted_by().empty()) {
				string const & name = _((*cit)->name());
				fl_addto_combox(combox_, name.c_str());
			}
		}
	}
	// we need to do this.
	fl_redraw_object(combox_);
}


void Toolbar::Pimpl::clearLayoutList()
{
	if (!combox_)
		return;

	fl_clear_combox(combox_);
	fl_redraw_object(combox_);
}


void Toolbar::Pimpl::openLayoutList()
{
	if (!combox_)
		return;

	fl_show_combox_browser(combox_);
}


namespace {

void ToolbarCB(FL_OBJECT * ob, long ac)
{
	XFormsView * owner = static_cast<XFormsView *>(ob->u_vdata);

	owner->getLyXFunc().dispatch(int(ac), true);
}


extern "C" {

void C_Toolbar_ToolbarCB(FL_OBJECT * ob, long data)
{
	ToolbarCB(ob, data);
}

}


void setPixmap(FL_OBJECT * obj, int action)
{
	string xpm_name;
	FuncRequest ev = lyxaction.retrieveActionArg(action);

	string const name = lyxaction.getActionName(ev.action);
	if (!ev.argument.empty())
		xpm_name = subst(name + ' ' + ev.argument, ' ','_');
	else
		xpm_name = name;

	string fullname = LibFileSearch("images", xpm_name, "xpm");

	if (ev.action == LFUN_INSERT_MATH && !ev.argument.empty()) {
		string arg = ev.argument.substr(1);
		fullname = LibFileSearch("images/math/", arg, "xpm");
	}

	if (!fullname.empty()) {
		lyxerr[Debug::GUI] << "Full icon name is `"
				   << fullname << '\'' << endl;
		fl_set_pixmapbutton_file(obj, fullname.c_str());
		return;
	}

	lyxerr << "Unable to find icon `" << xpm_name << '\'' << endl;
	fullname = LibFileSearch("images", "unknown", "xpm");
	if (!fullname.empty()) {
		lyxerr[Debug::GUI] << "Using default `unknown' icon"
				   << endl;
		fl_set_pixmapbutton_file(obj, fullname.c_str());
	}
}

} // namespace anon


void Toolbar::Pimpl::add(int action)
{
	toolbarItem item;
	item.action = action;

	switch (action) {
	case ToolbarBackend::SEPARATOR:
		xpos += sepspace;
		break;
	case ToolbarBackend::NEWLINE:
		// Not supported yet.
		break;
	case ToolbarBackend::LAYOUTS:
		xpos += standardspacing;
		if (combox_)
			break;

		combox_ = fl_add_combox(FL_DROPLIST_COMBOX,
					xpos, ypos, 135, height, "");
		fl_set_combox_browser_height(combox_, 400);
		fl_set_object_boxtype(combox_, FL_DOWN_BOX);
		fl_set_object_color(combox_, FL_MCOL, FL_MCOL);
		fl_set_object_gravity(combox_, FL_NorthWest, FL_NorthWest);
		fl_set_object_resize(combox_, FL_RESIZE_ALL);

		combox_->u_vdata = this;
		fl_set_object_callback(combox_, C_layoutSelectedCB, 0);
		xpos += 135;
		break;
	default: {
		FL_OBJECT * obj;

		xpos += standardspacing;
		item.icon = obj =
			fl_add_pixmapbutton(FL_NORMAL_BUTTON,
					    xpos, ypos,
					    buttonwidth,
					    height, "");
		fl_set_object_resize(obj, FL_RESIZE_ALL);
		fl_set_object_gravity(obj,
				      NorthWestGravity,
				      NorthWestGravity);
		fl_set_object_callback(obj, C_Toolbar_ToolbarCB,
				       static_cast<long>(action));
		// Remove the blue feedback rectangle
		fl_set_pixmapbutton_focus_outline(obj, 0);

		// initialise the tooltip
		string const tip = _(lyxaction.helpText(obj->argument));
		tooltip_->init(obj, tip);

		// The view that this object belongs to.
		obj->u_vdata = owner_;

		setPixmap(obj, action);
		// we must remember to update the positions
		xpos += buttonwidth;
		// ypos is constant
		/* Here will come a check to see if the new
		 * pos is within the bounds of the main frame,
		 * and perhaps wrap the toolbar if not.
		 */
		break;
	}
	}

	toollist_.push_back(item);
}