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/*
For general Scribus (>=1.3.2) copyright and licensing information please refer
to the COPYING file provided with the program. Following this notice may exist
a copyright and/or license notice that predates the release of Scribus 1.3.2
for which a new license (GPL+exception) is in place.
*/

/***************************************************************************
*   Copyright (C) 2007 by Franz Schmid                                     *
*   franz.schmid@altmuehlnet.de                                            *
*                                                                          *
*   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.                                    *
*                                                                          *
*   This program is distributed in the hope that it will be useful,        *
*   but WITHOUT ANY WARRANTY; without even the implied warranty of         *
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
*   GNU General Public License for more details.                           *
*                                                                          *
*   You should have received a copy of the GNU General Public License      *
*   along with this program; if not, write to the                          *
*   Free Software Foundation, Inc.,                                        *
*   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.              *
****************************************************************************/


#include "pathcut.h"
#include "scribuscore.h"
#include "scribusdoc.h"
#include "scribusstructs.h"
#include "selection.h"
#include "util.h"
#include "util_icon.h"
#include <QPainterPathStroker>
#include <QMessageBox>

int pathcut_getPluginAPIVersion()
{
        return PLUGIN_API_VERSION;
}

ScPlugin* pathcut_getPlugin()
{
        PathCutPlugin* plug = new PathCutPlugin();
        Q_CHECK_PTR(plug);
        return plug;
}

void pathcut_freePlugin(ScPlugin* plugin)
{
        PathCutPlugin* plug = dynamic_cast<PathCutPlugin*>(plugin);
        Q_ASSERT(plug);
        delete plug;
}

PathCutPlugin::PathCutPlugin() : ScActionPlugin()
{
        // Set action info in languageChange, so we only have to do
        // it in one place.
        languageChange();
}

PathCutPlugin::~PathCutPlugin() {};

void PathCutPlugin::languageChange()
{
        // Note that we leave the unused members unset. They'll be initialised
        // with their default ctors during construction.
        // Action name
        m_actionInfo.name = "PathCutter";
        // Action text for menu, including accel
        m_actionInfo.text = tr("Cut Polygon");
        m_actionInfo.helpText = tr("Cuts a Polygon with a Path.");
        // Menu
        m_actionInfo.icon1 = loadIcon("transform-crop-and-resize.png");
        m_actionInfo.icon2 = loadIcon("transform-crop-and-resize.png");
        m_actionInfo.menu = "ItemPathOps";
        m_actionInfo.parentMenu = "Item";
        m_actionInfo.subMenuName = tr("Path Tools");
        m_actionInfo.enabledOnStartup = false;
        m_actionInfo.notSuitableFor.append(PageItem::Line);
        m_actionInfo.notSuitableFor.append(PageItem::TextFrame);
        m_actionInfo.notSuitableFor.append(PageItem::ImageFrame);
        m_actionInfo.notSuitableFor.append(PageItem::PathText);
        m_actionInfo.notSuitableFor.append(PageItem::LatexFrame);
        m_actionInfo.notSuitableFor.append(PageItem::Symbol);
        m_actionInfo.notSuitableFor.append(PageItem::RegularPolygon);
        m_actionInfo.notSuitableFor.append(PageItem::Arc);
        m_actionInfo.notSuitableFor.append(PageItem::Spiral);
        m_actionInfo.forAppMode.append(modeNormal);
        m_actionInfo.needsNumObjects = 2;
        m_actionInfo.firstObjectType.append(PageItem::PolyLine);
        m_actionInfo.secondObjectType.append(PageItem::Polygon);
}

const QString PathCutPlugin::fullTrName() const
{
        return QObject::tr("PathCutter");
}

const ScActionPlugin::AboutData* PathCutPlugin::getAboutData() const
{
        AboutData* about = new AboutData;
        Q_CHECK_PTR(about);
        about->authors = QString::fromUtf8("Franz Schmid <Franz.Schmid@altmuehlnet.de>");
        about->shortDescription = tr("Cuts a Polygon by a Polyline");
        about->description = tr("Cuts a Polygon by a Polyline");
        // about->version
        // about->releaseDate
        // about->copyright
        about->license = "GPL";
        return about;
}

void PathCutPlugin::deleteAboutData(const AboutData* about) const
{
        Q_ASSERT(about);
        delete about;
}

bool PathCutPlugin::run(ScribusDoc* doc, QString)
{
        QString vers = QString(qVersion()).left(5);
        if (vers < "4.3.3")
        {
                QMessageBox::information(doc->scMW(), tr("Qt Version too old"), tr("This plugin requires at least version 4.3.3 of the Qt library"));
                return true;
        }
        ScribusDoc* currDoc = doc;
        if (currDoc == 0)
                currDoc = ScCore->primaryMainWindow()->doc;
        if (currDoc->m_Selection->count() > 1)
        {
                PageItem *Item1 = currDoc->m_Selection->itemAt(0);
                PageItem *Item2 = currDoc->m_Selection->itemAt(1);
                if (Item1->itemType() != PageItem::PolyLine)
                {
                        Item1 = currDoc->m_Selection->itemAt(1);
                        Item2 = currDoc->m_Selection->itemAt(0);
                }
                FPointArray path = Item1->PoLine;
                QPainterPathStroker stroke;
                stroke.setWidth(Item1->lineWidth());
                QPainterPath cutter = stroke.createStroke(path.toQPainterPath(false));
                QTransform ms;
                ms.translate(Item1->xPos() - Item2->xPos(), Item1->yPos() - Item2->yPos());
                ms.rotate(Item1->rotation());
                cutter = ms.map(cutter);
                path.map(ms);
                FPoint start = path.point(0);
                FPoint end = path.point(path.size()-2);
                QTransform mm;
                mm.rotate(Item2->rotation());
                QPainterPath objekt = mm.map(Item2->PoLine.toQPainterPath(true));
                if ((objekt.contains(QPointF(start.x(), start.y()))) || (objekt.contains(QPointF(end.x(), end.y()))))
                {
                        QMessageBox::information(doc->scMW(), tr("Error"), tr("The cutting line must cross the polygon and\nboth end points must lie outside of the polygon"));
                        return true;
                }
                QPainterPath result = objekt.subtracted(cutter);
                FPointArray points;
                points.fromQPainterPath(result);
                Item2->PoLine = points;
                Item2->ClipEdited = true;
                Item2->FrameType = 3;
                currDoc->AdjustItemSize(Item2);
                Item2->OldB2 = Item2->width();
                Item2->OldH2 = Item2->height();
                Item2->updateClip();
                Item2->ContourLine = Item2->PoLine.copy();
//              currDoc->m_Selection->clear();
//              currDoc->m_Selection->addItem(Item1);
//              currDoc->itemSelection_DeleteItem();
                currDoc->m_Selection->clear();
                currDoc->m_Selection->addItem(Item2);
                currDoc->itemSelection_SplitItems();
                currDoc->changed();
        }
        return true;
}