/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtPDF module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
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import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Pdf 5.15
import QtQuick.Shapes 1.15

Rectangle {
    id: paper
    width: image.width
    height: image.height

    // public API
    // TODO 5.15: required property
    property var document: null
    property real renderScale: 1
    property alias sourceSize: image.sourceSize
    property alias currentPage: image.currentFrame
    property alias pageCount: image.frameCount
    property alias searchString: searchModel.searchString
    property alias status: image.status

    property real __pageScale: image.paintedWidth / document.pagePointSize(image.currentFrame).width

    PdfSearchModel {
        id: searchModel
        document: paper.document
        page: image.currentFrame
    }

    Image {
        id: image
        source: document.status === PdfDocument.Ready ? document.source : ""
        asynchronous: true
        fillMode: Image.PreserveAspectFit
    }
    function reRenderIfNecessary() {
        var newSourceWidth = image.sourceSize.width * paper.scale
        var ratio = newSourceWidth / image.sourceSize.width
        if (ratio > 1.1 || ratio < 0.9) {
            image.sourceSize.width = newSourceWidth
            image.sourceSize.height = 1
            paper.scale = 1
        }
    }
    onRenderScaleChanged: {
        image.sourceSize.width = document.pagePointSize(image.currentFrame).width * renderScale
        image.sourceSize.height = 0
        paper.scale = 1
    }

    Shape {
        anchors.fill: parent
        opacity: 0.25
        visible: image.status === Image.Ready
        ShapePath {
            strokeWidth: 1
            strokeColor: "blue"
            fillColor: "cyan"
            scale: Qt.size(paper.__pageScale, paper.__pageScale)
            PathMultiline {
                id: searchResultBoundaries
                paths: searchModel.matchGeometry
            }
        }
    }
    PinchHandler {
        id: pinch
        minimumScale: 0.1
        maximumScale: 10
        minimumRotation: 0
        maximumRotation: 0
        onActiveChanged: if (!active) paper.reRenderIfNecessary()
        grabPermissions: PinchHandler.TakeOverForbidden // don't allow takeover if pinch has started
    }
    DragHandler {
        id: pageMovingTouchDrag
        acceptedDevices: PointerDevice.TouchScreen
    }
    DragHandler {
        id: pageMovingMiddleMouseDrag
        acceptedDevices: PointerDevice.Mouse | PointerDevice.Stylus
        acceptedButtons: Qt.MiddleButton
        snapMode: DragHandler.NoSnap
    }
}