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** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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** This file is part of the Qt Virtual Keyboard module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
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import QtQuick 2.0
import QtQuick.VirtualKeyboard 2.1

ListView {
    id: wordCandidatePopupList

    property int maxVisibleItems: 5
    readonly property int preferredVisibleItems: {
        if (!currentItem)
            return 0
        var maxHeight = flipVertical ? Qt.inputMethod.cursorRectangle.y : parent.height - Qt.inputMethod.cursorRectangle.height - Qt.inputMethod.cursorRectangle.y
        var result = Math.min(count, maxVisibleItems)
        while (result > 2 && result * currentItem.height > maxHeight)
            --result
        return result
    }
    readonly property real contentWidth: contentItem.childrenRect.width
    readonly property bool flipVertical: currentItem &&
                                         Qt.inputMethod.cursorRectangle.y + (Qt.inputMethod.cursorRectangle.height / 2) > (parent.height / 2) &&
                                         Qt.inputMethod.cursorRectangle.y + Qt.inputMethod.cursorRectangle.height + (currentItem.height * 2) > parent.height

    clip: true
    visible: enabled && count > 0
    height: currentItem ? currentItem.height * preferredVisibleItems + (spacing * preferredVisibleItems - 1) : 0
    Binding {
        target: wordCandidatePopupList
        property: "x"
        value: Math.round(Qt.inputMethod.cursorRectangle.x -
               (wordCandidatePopupList.currentItem ?
                    (wordCandidatePopupList.currentItem.hasOwnProperty("cursorAnchor") ?
                         wordCandidatePopupList.currentItem.cursorAnchor : wordCandidatePopupList.currentItem.width) : 0))
        when: wordCandidatePopupList.visible
    }
    Binding {
        target: wordCandidatePopupList
        property: "y"
        value: Math.round(wordCandidatePopupList.flipVertical ? Qt.inputMethod.cursorRectangle.y - wordCandidatePopupList.height : Qt.inputMethod.cursorRectangle.y + Qt.inputMethod.cursorRectangle.height)
        when: wordCandidatePopupList.visible
    }
    orientation: ListView.Vertical
    snapMode: ListView.SnapToItem
    delegate: keyboard.style.popupListDelegate
    highlight: keyboard.style.popupListHighlight ? keyboard.style.popupListHighlight : null
    highlightMoveDuration: 0
    highlightResizeDuration: 0
    add: keyboard.style.popupListAdd
    remove: keyboard.style.popupListRemove
    keyNavigationWraps: true
    model: enabled ? InputContext.inputEngine.wordCandidateListModel : null

    onContentWidthChanged: viewResizeTimer.restart()
    onCurrentItemChanged: if (currentItem) keyboard.soundEffect.register(currentItem.soundEffect)

    Timer {
        id: viewResizeTimer
        interval: 0
        repeat: false
        onTriggered: wordCandidatePopupList.width = wordCandidatePopupList.contentWidth
    }

    Connections {
        target: wordCandidatePopupList.model ? wordCandidatePopupList.model : null
        onActiveItemChanged: wordCandidatePopupList.currentIndex = index
        onItemSelected: if (wordCandidatePopupList.currentItem) keyboard.soundEffect.play(wordCandidatePopupList.currentItem.soundEffect)
    }

    Loader {
        sourceComponent: keyboard.style.popupListBackground
        anchors.fill: parent
        z: -1
    }
}