/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** 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
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qquickmaterialstyle_p.h"

#include <QtCore/qdebug.h>
#include <QtCore/qsettings.h>
#include <QtQml/qqmlinfo.h>
#include <QtQuickControls2/private/qquickstyle_p.h>

QT_BEGIN_NAMESPACE

static const QRgb colors[][14] = {
    // Red
    {
        0xFFFFEBEE, // Shade50
        0xFFFFCDD2, // Shade100
        0xFFEF9A9A, // Shade200
        0xFFE57373, // Shade300
        0xFFEF5350, // Shade400
        0xFFF44336, // Shade500
        0xFFE53935, // Shade600
        0xFFD32F2F, // Shade700
        0xFFC62828, // Shade800
        0xFFB71C1C, // Shade900
        0xFFFF8A80, // ShadeA100
        0xFFFF5252, // ShadeA200
        0xFFFF1744, // ShadeA400
        0xFFD50000  // ShadeA700
    },
    // Pink
    {
        0xFFFCE4EC, // Shade50
        0xFFF8BBD0, // Shade100
        0xFFF48FB1, // Shade200
        0xFFF06292, // Shade300
        0xFFEC407A, // Shade400
        0xFFE91E63, // Shade500
        0xFFD81B60, // Shade600
        0xFFC2185B, // Shade700
        0xFFAD1457, // Shade800
        0xFF880E4F, // Shade900
        0xFFFF80AB, // ShadeA100
        0xFFFF4081, // ShadeA200
        0xFFF50057, // ShadeA400
        0xFFC51162  // ShadeA700
    },
    // Purple
    {
        0xFFF3E5F5, // Shade50
        0xFFE1BEE7, // Shade100
        0xFFCE93D8, // Shade200
        0xFFBA68C8, // Shade300
        0xFFAB47BC, // Shade400
        0xFF9C27B0, // Shade500
        0xFF8E24AA, // Shade600
        0xFF7B1FA2, // Shade700
        0xFF6A1B9A, // Shade800
        0xFF4A148C, // Shade900
        0xFFEA80FC, // ShadeA100
        0xFFE040FB, // ShadeA200
        0xFFD500F9, // ShadeA400
        0xFFAA00FF  // ShadeA700
    },
    // DeepPurple
    {
        0xFFEDE7F6, // Shade50
        0xFFD1C4E9, // Shade100
        0xFFB39DDB, // Shade200
        0xFF9575CD, // Shade300
        0xFF7E57C2, // Shade400
        0xFF673AB7, // Shade500
        0xFF5E35B1, // Shade600
        0xFF512DA8, // Shade700
        0xFF4527A0, // Shade800
        0xFF311B92, // Shade900
        0xFFB388FF, // ShadeA100
        0xFF7C4DFF, // ShadeA200
        0xFF651FFF, // ShadeA400
        0xFF6200EA  // ShadeA700
    },
    // Indigo
    {
        0xFFE8EAF6, // Shade50
        0xFFC5CAE9, // Shade100
        0xFF9FA8DA, // Shade200
        0xFF7986CB, // Shade300
        0xFF5C6BC0, // Shade400
        0xFF3F51B5, // Shade500
        0xFF3949AB, // Shade600
        0xFF303F9F, // Shade700
        0xFF283593, // Shade800
        0xFF1A237E, // Shade900
        0xFF8C9EFF, // ShadeA100
        0xFF536DFE, // ShadeA200
        0xFF3D5AFE, // ShadeA400
        0xFF304FFE  // ShadeA700
    },
    // Blue
    {
        0xFFE3F2FD, // Shade50
        0xFFBBDEFB, // Shade100
        0xFF90CAF9, // Shade200
        0xFF64B5F6, // Shade300
        0xFF42A5F5, // Shade400
        0xFF2196F3, // Shade500
        0xFF1E88E5, // Shade600
        0xFF1976D2, // Shade700
        0xFF1565C0, // Shade800
        0xFF0D47A1, // Shade900
        0xFF82B1FF, // ShadeA100
        0xFF448AFF, // ShadeA200
        0xFF2979FF, // ShadeA400
        0xFF2962FF  // ShadeA700
    },
    // LightBlue
    {
        0xFFE1F5FE, // Shade50
        0xFFB3E5FC, // Shade100
        0xFF81D4FA, // Shade200
        0xFF4FC3F7, // Shade300
        0xFF29B6F6, // Shade400
        0xFF03A9F4, // Shade500
        0xFF039BE5, // Shade600
        0xFF0288D1, // Shade700
        0xFF0277BD, // Shade800
        0xFF01579B, // Shade900
        0xFF80D8FF, // ShadeA100
        0xFF40C4FF, // ShadeA200
        0xFF00B0FF, // ShadeA400
        0xFF0091EA  // ShadeA700
    },
    // Cyan
    {
        0xFFE0F7FA, // Shade50
        0xFFB2EBF2, // Shade100
        0xFF80DEEA, // Shade200
        0xFF4DD0E1, // Shade300
        0xFF26C6DA, // Shade400
        0xFF00BCD4, // Shade500
        0xFF00ACC1, // Shade600
        0xFF0097A7, // Shade700
        0xFF00838F, // Shade800
        0xFF006064, // Shade900
        0xFF84FFFF, // ShadeA100
        0xFF18FFFF, // ShadeA200
        0xFF00E5FF, // ShadeA400
        0xFF00B8D4  // ShadeA700
    },
    // Teal
    {
        0xFFE0F2F1, // Shade50
        0xFFB2DFDB, // Shade100
        0xFF80CBC4, // Shade200
        0xFF4DB6AC, // Shade300
        0xFF26A69A, // Shade400
        0xFF009688, // Shade500
        0xFF00897B, // Shade600
        0xFF00796B, // Shade700
        0xFF00695C, // Shade800
        0xFF004D40, // Shade900
        0xFFA7FFEB, // ShadeA100
        0xFF64FFDA, // ShadeA200
        0xFF1DE9B6, // ShadeA400
        0xFF00BFA5  // ShadeA700
    },
    // Green
    {
        0xFFE8F5E9, // Shade50
        0xFFC8E6C9, // Shade100
        0xFFA5D6A7, // Shade200
        0xFF81C784, // Shade300
        0xFF66BB6A, // Shade400
        0xFF4CAF50, // Shade500
        0xFF43A047, // Shade600
        0xFF388E3C, // Shade700
        0xFF2E7D32, // Shade800
        0xFF1B5E20, // Shade900
        0xFFB9F6CA, // ShadeA100
        0xFF69F0AE, // ShadeA200
        0xFF00E676, // ShadeA400
        0xFF00C853  // ShadeA700
    },
    // LightGreen
    {
        0xFFF1F8E9, // Shade50
        0xFFDCEDC8, // Shade100
        0xFFC5E1A5, // Shade200
        0xFFAED581, // Shade300
        0xFF9CCC65, // Shade400
        0xFF8BC34A, // Shade500
        0xFF7CB342, // Shade600
        0xFF689F38, // Shade700
        0xFF558B2F, // Shade800
        0xFF33691E, // Shade900
        0xFFCCFF90, // ShadeA100
        0xFFB2FF59, // ShadeA200
        0xFF76FF03, // ShadeA400
        0xFF64DD17  // ShadeA700
    },
    // Lime
    {
        0xFFF9FBE7, // Shade50
        0xFFF0F4C3, // Shade100
        0xFFE6EE9C, // Shade200
        0xFFDCE775, // Shade300
        0xFFD4E157, // Shade400
        0xFFCDDC39, // Shade500
        0xFFC0CA33, // Shade600
        0xFFAFB42B, // Shade700
        0xFF9E9D24, // Shade800
        0xFF827717, // Shade900
        0xFFF4FF81, // ShadeA100
        0xFFEEFF41, // ShadeA200
        0xFFC6FF00, // ShadeA400
        0xFFAEEA00  // ShadeA700
    },
    // Yellow
    {
        0xFFFFFDE7, // Shade50
        0xFFFFF9C4, // Shade100
        0xFFFFF59D, // Shade200
        0xFFFFF176, // Shade300
        0xFFFFEE58, // Shade400
        0xFFFFEB3B, // Shade500
        0xFFFDD835, // Shade600
        0xFFFBC02D, // Shade700
        0xFFF9A825, // Shade800
        0xFFF57F17, // Shade900
        0xFFFFFF8D, // ShadeA100
        0xFFFFFF00, // ShadeA200
        0xFFFFEA00, // ShadeA400
        0xFFFFD600  // ShadeA700
    },
    // Amber
    {
        0xFFFFF8E1, // Shade50
        0xFFFFECB3, // Shade100
        0xFFFFE082, // Shade200
        0xFFFFD54F, // Shade300
        0xFFFFCA28, // Shade400
        0xFFFFC107, // Shade500
        0xFFFFB300, // Shade600
        0xFFFFA000, // Shade700
        0xFFFF8F00, // Shade800
        0xFFFF6F00, // Shade900
        0xFFFFE57F, // ShadeA100
        0xFFFFD740, // ShadeA200
        0xFFFFC400, // ShadeA400
        0xFFFFAB00  // ShadeA700
    },
    // Orange
    {
        0xFFFFF3E0, // Shade50
        0xFFFFE0B2, // Shade100
        0xFFFFCC80, // Shade200
        0xFFFFB74D, // Shade300
        0xFFFFA726, // Shade400
        0xFFFF9800, // Shade500
        0xFFFB8C00, // Shade600
        0xFFF57C00, // Shade700
        0xFFEF6C00, // Shade800
        0xFFE65100, // Shade900
        0xFFFFD180, // ShadeA100
        0xFFFFAB40, // ShadeA200
        0xFFFF9100, // ShadeA400
        0xFFFF6D00  // ShadeA700
    },
    // DeepOrange
    {
        0xFFFBE9E7, // Shade50
        0xFFFFCCBC, // Shade100
        0xFFFFAB91, // Shade200
        0xFFFF8A65, // Shade300
        0xFFFF7043, // Shade400
        0xFFFF5722, // Shade500
        0xFFF4511E, // Shade600
        0xFFE64A19, // Shade700
        0xFFD84315, // Shade800
        0xFFBF360C, // Shade900
        0xFFFF9E80, // ShadeA100
        0xFFFF6E40, // ShadeA200
        0xFFFF3D00, // ShadeA400
        0xFFDD2C00  // ShadeA700
    },
    // Brown
    {
        0xFFEFEBE9, // Shade50
        0xFFD7CCC8, // Shade100
        0xFFBCAAA4, // Shade200
        0xFFA1887F, // Shade300
        0xFF8D6E63, // Shade400
        0xFF795548, // Shade500
        0xFF6D4C41, // Shade600
        0xFF5D4037, // Shade700
        0xFF4E342E, // Shade800
        0xFF3E2723, // Shade900
        0xFF000000, // ShadeA100
        0xFF000000, // ShadeA200
        0xFF000000, // ShadeA400
        0xFF000000  // ShadeA700
    },
    // Grey
    {
        0xFFFAFAFA, // Shade50
        0xFFF5F5F5, // Shade100
        0xFFEEEEEE, // Shade200
        0xFFE0E0E0, // Shade300
        0xFFBDBDBD, // Shade400
        0xFF9E9E9E, // Shade500
        0xFF757575, // Shade600
        0xFF616161, // Shade700
        0xFF424242, // Shade800
        0xFF212121, // Shade900
        0xFF000000, // ShadeA100
        0xFF000000, // ShadeA200
        0xFF000000, // ShadeA400
        0xFF000000  // ShadeA700
    },
    // BlueGrey
    {
        0xFFECEFF1, // Shade50
        0xFFCFD8DC, // Shade100
        0xFFB0BEC5, // Shade200
        0xFF90A4AE, // Shade300
        0xFF78909C, // Shade400
        0xFF607D8B, // Shade500
        0xFF546E7A, // Shade600
        0xFF455A64, // Shade700
        0xFF37474F, // Shade800
        0xFF263238, // Shade900
        0xFF000000, // ShadeA100
        0xFF000000, // ShadeA200
        0xFF000000, // ShadeA400
        0xFF000000  // ShadeA700
    }
};

// If no value was inherited from a parent or explicitly set, the "global" values are used.
// The initial, default values of the globals are hard-coded here, but the environment
// variables and .conf file override them if specified.
static QQuickMaterialStyle::Theme globalTheme = QQuickMaterialStyle::Light;
static uint globalPrimary = QQuickMaterialStyle::Indigo;
static uint globalAccent = QQuickMaterialStyle::Pink;
static uint globalForeground = 0xDD000000; // primaryTextColorLight
static uint globalBackground = 0xFFFAFAFA; // backgroundColorLight
// These represent whether a global foreground/background was set.
// Each style's m_hasForeground/m_hasBackground are initialized to these values.
static bool hasGlobalForeground = false;
static bool hasGlobalBackground = false;
// These represent whether or not the global color value was specified as one of the
// values that QColor accepts, as opposed to one of the pre-defined colors like Red.
static bool globalPrimaryCustom = false;
static bool globalAccentCustom = false;
static bool globalForegroundCustom = true;
static bool globalBackgroundCustom = true;
// This is global because:
// 1) The theme needs access to it to determine font sizes.
// 2) There can only be one variant used for the whole application.
static QQuickMaterialStyle::Variant globalVariant = QQuickMaterialStyle::Normal;

static const QRgb backgroundColorLight = 0xFFFAFAFA;
static const QRgb backgroundColorDark = 0xFF303030;
static const QRgb dialogColorLight = 0xFFFFFFFF;
static const QRgb dialogColorDark = 0xFF424242;
static const QRgb primaryTextColorLight = 0xDD000000;
static const QRgb primaryTextColorDark = 0xFFFFFFFF;
static const QRgb secondaryTextColorLight = 0x89000000;
static const QRgb secondaryTextColorDark = 0xB2FFFFFF;
static const QRgb hintTextColorLight = 0x60000000;
static const QRgb hintTextColorDark = 0x4CFFFFFF;
static const QRgb dividerColorLight = 0x1E000000;
static const QRgb dividerColorDark = 0x1EFFFFFF;
static const QRgb iconColorLight = 0x89000000;
static const QRgb iconColorDark = 0xFFFFFFFF;
static const QRgb iconDisabledColorLight = 0x42000000;
static const QRgb iconDisabledColorDark = 0x4CFFFFFF;
static const QRgb raisedButtonColorLight = 0xFFD6D7D7;
static const QRgb raisedButtonColorDark = 0x3FCCCCCC;
static const QRgb raisedButtonDisabledColorLight = dividerColorLight;
static const QRgb raisedButtonDisabledColorDark = dividerColorDark;
static const QRgb frameColorLight = hintTextColorLight;
static const QRgb frameColorDark = hintTextColorDark;
static const QRgb switchUncheckedTrackColorLight = 0x42000000;
static const QRgb switchUncheckedTrackColorDark = 0x4CFFFFFF;
static const QRgb switchDisabledTrackColorLight = 0x1E000000;
static const QRgb switchDisabledTrackColorDark = 0x19FFFFFF;
static const QRgb rippleColorLight = 0x10000000;
static const QRgb rippleColorDark = 0x20FFFFFF;
static const QRgb spinBoxDisabledIconColorLight = 0xFFCCCCCC;
static const QRgb spinBoxDisabledIconColorDark = 0xFF666666;
static const QRgb sliderDisabledColorLight = 0xFF9E9E9E;
static const QRgb sliderDisabledColorDark = 0xFF616161;

static QQuickMaterialStyle::Theme effectiveTheme(QQuickMaterialStyle::Theme theme)
{
    if (theme == QQuickMaterialStyle::System)
        theme = QQuickStylePrivate::isDarkSystemTheme() ? QQuickMaterialStyle::Dark : QQuickMaterialStyle::Light;
    return theme;
}

QQuickMaterialStyle::QQuickMaterialStyle(QObject *parent) : QQuickAttachedObject(parent),
    m_customPrimary(globalPrimaryCustom),
    m_customAccent(globalAccentCustom),
    m_customForeground(globalForegroundCustom),
    m_customBackground(globalBackgroundCustom),
    m_hasForeground(hasGlobalForeground),
    m_hasBackground(hasGlobalBackground),
    m_theme(globalTheme),
    m_primary(globalPrimary),
    m_accent(globalAccent),
    m_foreground(globalForeground),
    m_background(globalBackground)
{
    QQuickAttachedObject::init();
}

QQuickMaterialStyle *QQuickMaterialStyle::qmlAttachedProperties(QObject *object)
{
    return new QQuickMaterialStyle(object);
}

QQuickMaterialStyle::Theme QQuickMaterialStyle::theme() const
{
    return m_theme;
}

void QQuickMaterialStyle::setTheme(Theme theme)
{
    if (theme == System)
        theme = QQuickStylePrivate::isDarkSystemTheme() ? Dark : Light;

    m_explicitTheme = true;
    if (m_theme == theme)
        return;

    m_theme = theme;
    propagateTheme();
    emit themeChanged();
    emit paletteChanged();
    if (!m_customAccent)
        emit accentChanged();
    if (!m_hasBackground)
        emit backgroundChanged();
    if (!m_hasForeground)
        emit foregroundChanged();
}

void QQuickMaterialStyle::inheritTheme(Theme theme)
{
    if (m_explicitTheme || m_theme == theme)
        return;

    m_theme = theme;
    propagateTheme();
    emit themeChanged();
    emit paletteChanged();
    if (!m_customAccent)
        emit accentChanged();
    if (!m_hasBackground)
        emit backgroundChanged();
    if (!m_hasForeground)
        emit foregroundChanged();
}

void QQuickMaterialStyle::propagateTheme()
{
    const auto styles = attachedChildren();
    for (QQuickAttachedObject *child : styles) {
        QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(child);
        if (material)
            material->inheritTheme(m_theme);
    }
}

void QQuickMaterialStyle::resetTheme()
{
    if (!m_explicitTheme)
        return;

    m_explicitTheme = false;
    QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(attachedParent());
    inheritTheme(material ? material->theme() : globalTheme);
}

QVariant QQuickMaterialStyle::primary() const
{
    return primaryColor();
}

void QQuickMaterialStyle::setPrimary(const QVariant &var)
{
    QRgb primary = 0;
    bool custom = false;
    if (!variantToRgba(var, "primary", &primary, &custom))
        return;

    m_explicitPrimary = true;
    if (m_primary == primary)
        return;

    m_customPrimary = custom;
    m_primary = primary;
    propagatePrimary();
    emit primaryChanged();
    emit paletteChanged();
}

void QQuickMaterialStyle::inheritPrimary(uint primary, bool custom)
{
    if (m_explicitPrimary || m_primary == primary)
        return;

    m_customPrimary = custom;
    m_primary = primary;
    propagatePrimary();
    emit primaryChanged();
    emit paletteChanged();
}

void QQuickMaterialStyle::propagatePrimary()
{
    const auto styles = attachedChildren();
    for (QQuickAttachedObject *child : styles) {
        QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(child);
        if (material)
            material->inheritPrimary(m_primary, m_customPrimary);
    }
}

void QQuickMaterialStyle::resetPrimary()
{
    if (!m_explicitPrimary)
        return;

    m_customPrimary = false;
    m_explicitPrimary = false;
    QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(attachedParent());
    if (material)
        inheritPrimary(material->m_primary, material->m_customPrimary);
    else
        inheritPrimary(globalPrimary, false);
}

QVariant QQuickMaterialStyle::accent() const
{
    return accentColor();
}

void QQuickMaterialStyle::setAccent(const QVariant &var)
{
    QRgb accent = 0;
    bool custom = false;
    if (!variantToRgba(var, "accent", &accent, &custom))
        return;

    m_explicitAccent = true;
    if (m_accent == accent)
        return;

    m_customAccent = custom;
    m_accent = accent;
    propagateAccent();
    emit accentChanged();
    emit paletteChanged();
}

void QQuickMaterialStyle::inheritAccent(uint accent, bool custom)
{
    if (m_explicitAccent || m_accent == accent)
        return;

    m_customAccent = custom;
    m_accent = accent;
    propagateAccent();
    emit accentChanged();
    emit paletteChanged();
}

void QQuickMaterialStyle::propagateAccent()
{
    const auto styles = attachedChildren();
    for (QQuickAttachedObject *child : styles) {
        QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(child);
        if (material)
            material->inheritAccent(m_accent, m_customAccent);
    }
}

void QQuickMaterialStyle::resetAccent()
{
    if (!m_explicitAccent)
        return;

    m_customAccent = false;
    m_explicitAccent = false;
    QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(attachedParent());
    if (material)
        inheritAccent(material->m_accent, material->m_customAccent);
    else
        inheritAccent(globalAccent, false);
}

QVariant QQuickMaterialStyle::foreground() const
{
    if (!m_hasForeground)
        return QColor::fromRgba(m_theme == Light ? primaryTextColorLight : primaryTextColorDark);
    if (m_customForeground)
        return QColor::fromRgba(m_foreground);
    if (m_foreground > BlueGrey)
        return QColor();
    return QColor::fromRgba(colors[m_foreground][Shade500]);
}

void QQuickMaterialStyle::setForeground(const QVariant &var)
{
    QRgb foreground = 0;
    bool custom = false;
    if (!variantToRgba(var, "foreground", &foreground, &custom))
        return;

    m_hasForeground = true;
    m_explicitForeground = true;
    if (m_foreground == foreground)
        return;

    m_customForeground = custom;
    m_foreground = foreground;
    propagateForeground();
    emit foregroundChanged();
    emit paletteChanged();
}

void QQuickMaterialStyle::inheritForeground(uint foreground, bool custom, bool has)
{
    if (m_explicitForeground || m_foreground == foreground)
        return;

    m_hasForeground = has;
    m_customForeground = custom;
    m_foreground = foreground;
    propagateForeground();
    emit foregroundChanged();
}

void QQuickMaterialStyle::propagateForeground()
{
    const auto styles = attachedChildren();
    for (QQuickAttachedObject *child : styles) {
        QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(child);
        if (material)
            material->inheritForeground(m_foreground, m_customForeground, m_hasForeground);
    }
}

void QQuickMaterialStyle::resetForeground()
{
    if (!m_explicitForeground)
        return;

    m_hasForeground = false;
    m_customForeground = false;
    m_explicitForeground = false;
    QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(attachedParent());
    inheritForeground(material ? material->m_foreground : globalForeground, true, material ? material->m_hasForeground : false);
}

QVariant QQuickMaterialStyle::background() const
{
    return backgroundColor();
}

void QQuickMaterialStyle::setBackground(const QVariant &var)
{
    QRgb background = 0;
    bool custom = false;
    if (!variantToRgba(var, "background", &background, &custom))
        return;

    m_hasBackground = true;
    m_explicitBackground = true;
    if (m_background == background)
        return;

    m_customBackground = custom;
    m_background = background;
    propagateBackground();
    emit backgroundChanged();
    emit paletteChanged();
}

void QQuickMaterialStyle::inheritBackground(uint background, bool custom, bool has)
{
    if (m_explicitBackground || m_background == background)
        return;

    m_hasBackground = has;
    m_customBackground = custom;
    m_background = background;
    propagateBackground();
    emit backgroundChanged();
    emit paletteChanged();
}

void QQuickMaterialStyle::propagateBackground()
{
    const auto styles = attachedChildren();
    for (QQuickAttachedObject *child : styles) {
        QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(child);
        if (material)
            material->inheritBackground(m_background, m_customBackground, m_hasBackground);
    }
}

void QQuickMaterialStyle::resetBackground()
{
    if (!m_explicitBackground)
        return;

    m_hasBackground = false;
    m_customBackground = false;
    m_explicitBackground = false;
    QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(attachedParent());
    inheritBackground(material ? material->m_background : globalBackground, true, material ? material->m_hasBackground : false);
}

int QQuickMaterialStyle::elevation() const
{
    return m_elevation;
}

void QQuickMaterialStyle::setElevation(int elevation)
{
    if (m_elevation == elevation)
        return;

    m_elevation = elevation;
    emit elevationChanged();
}

void QQuickMaterialStyle::resetElevation()
{
    setElevation(0);
}

QColor QQuickMaterialStyle::primaryColor() const
{
    if (m_customPrimary)
        return QColor::fromRgba(m_primary);
    if (m_primary > BlueGrey)
        return QColor();
    return colors[m_primary][Shade500];
}

QColor QQuickMaterialStyle::accentColor(Shade shade) const
{
    if (m_customAccent)
        return shade == themeShade() ? QColor::fromRgba(m_accent)
                                     : this->shade(QColor::fromRgba(m_accent), shade);
    if (m_accent > BlueGrey)
        return QColor();
    return colors[m_accent][shade];
}

QColor QQuickMaterialStyle::accentColor() const
{
    return accentColor(themeShade());
}

QColor QQuickMaterialStyle::backgroundColor(Shade shade) const
{
    if (!m_hasBackground)
        return QColor::fromRgba(m_theme == Light ? backgroundColorLight : backgroundColorDark);
    if (m_customBackground)
        return shade == themeShade() ? QColor::fromRgba(m_background)
                                     : this->shade(QColor::fromRgba(m_background), shade);
    if (m_background > BlueGrey)
        return QColor();
    return colors[m_background][shade];
}

QColor QQuickMaterialStyle::backgroundColor() const
{
    return backgroundColor(themeShade());
}

QColor QQuickMaterialStyle::primaryTextColor() const
{
    return QColor::fromRgba(m_theme == Light ? primaryTextColorLight : primaryTextColorDark);
}

QColor QQuickMaterialStyle::primaryHighlightedTextColor() const
{
    if (m_explicitForeground)
        return primaryTextColor();
    return QColor::fromRgba(primaryTextColorDark);
}

QColor QQuickMaterialStyle::secondaryTextColor() const
{
    return QColor::fromRgba(m_theme == Light ? secondaryTextColorLight : secondaryTextColorDark);
}

QColor QQuickMaterialStyle::hintTextColor() const
{
    return QColor::fromRgba(m_theme == Light ? hintTextColorLight : hintTextColorDark);
}

QColor QQuickMaterialStyle::textSelectionColor() const
{
    QColor color = accentColor();
    color.setAlphaF(0.4);
    return color;
}

QColor QQuickMaterialStyle::dropShadowColor() const
{
    return QColor::fromRgba(0x40000000);
}

QColor QQuickMaterialStyle::dividerColor() const
{
    return QColor::fromRgba(m_theme == Light ? dividerColorLight : dividerColorDark);
}

QColor QQuickMaterialStyle::iconColor() const
{
    return QColor::fromRgba(m_theme == Light ? iconColorLight : iconColorDark);
}

QColor QQuickMaterialStyle::iconDisabledColor() const
{
    return QColor::fromRgba(m_theme == Light ? iconDisabledColorLight : iconDisabledColorDark);
}

QColor QQuickMaterialStyle::buttonColor(bool highlighted) const
{
    Shade shade = themeShade();

    QColor color = Qt::transparent;

    if (m_explicitBackground) {
        color = backgroundColor(shade);
    } else if (highlighted) {
        color = accentColor(shade);
    } else if (elevation() > 0) {
        color = QColor::fromRgba(m_theme == Light ? raisedButtonColorLight
                                                  : raisedButtonColorDark);
    }

    return color;
}

QColor QQuickMaterialStyle::buttonColor() const
{
    return buttonColor(false);
}

QColor QQuickMaterialStyle::buttonDisabledColor() const
{
    if (elevation() > 0) {
        return QColor::fromRgba(m_theme == Light ? raisedButtonDisabledColorLight
                                                 : raisedButtonDisabledColorDark);
    } else {
        return Qt::transparent;
    }
}

QColor QQuickMaterialStyle::highlightedButtonColor() const
{
    return buttonColor(true);
}

QColor QQuickMaterialStyle::frameColor() const
{
    return QColor::fromRgba(m_theme == Light ? frameColorLight : frameColorDark);
}

QColor QQuickMaterialStyle::rippleColor() const
{
    return QColor::fromRgba(m_theme == Light ? rippleColorLight : rippleColorDark);
}

QColor QQuickMaterialStyle::highlightedRippleColor() const
{
    QColor pressColor = accentColor();
    pressColor.setAlpha(m_theme == Light ? 30 : 50);
    return pressColor;
}

QColor QQuickMaterialStyle::switchUncheckedTrackColor() const
{
    return QColor::fromRgba(m_theme == Light ? switchUncheckedTrackColorLight : switchUncheckedTrackColorDark);
}

QColor QQuickMaterialStyle::switchCheckedTrackColor() const
{
    QColor trackColor(accentColor());
    trackColor.setAlphaF(0.5);
    return trackColor;
}

QColor QQuickMaterialStyle::switchUncheckedHandleColor() const
{
    return m_theme == Light ? color(Grey, Shade50) : color(Grey, Shade400);
}

QColor QQuickMaterialStyle::switchCheckedHandleColor() const
{
    return m_theme == Light ? accentColor() : shade(accentColor(), Shade200);
}

QColor QQuickMaterialStyle::switchDisabledTrackColor() const
{
    return QColor::fromRgba(m_theme == Light ? switchDisabledTrackColorLight : switchDisabledTrackColorDark);
}

QColor QQuickMaterialStyle::switchDisabledHandleColor() const
{
    return m_theme == Light ? color(Grey, Shade400) : color(Grey, Shade800);
}

QColor QQuickMaterialStyle::scrollBarColor() const
{
    return QColor::fromRgba(m_theme == Light ? 0x40000000 : 0x40FFFFFF);
}

QColor QQuickMaterialStyle::scrollBarHoveredColor() const
{
    return QColor::fromRgba(m_theme == Light ? 0x60000000 : 0x60FFFFFF);
}

QColor QQuickMaterialStyle::scrollBarPressedColor() const
{
    return QColor::fromRgba(m_theme == Light ? 0x80000000 : 0x80FFFFFF);
}

QColor QQuickMaterialStyle::dialogColor() const
{
    if (m_hasBackground)
        return backgroundColor();
    return QColor::fromRgba(m_theme == Light ? dialogColorLight : dialogColorDark);
}

QColor QQuickMaterialStyle::backgroundDimColor() const
{
    return QColor::fromRgba(m_theme == Light ? 0x99303030 : 0x99fafafa);
}

QColor QQuickMaterialStyle::listHighlightColor() const
{
    return QColor::fromRgba(m_theme == Light ? 0x1e000000 : 0x1effffff);
}

QColor QQuickMaterialStyle::tooltipColor() const
{
    if (m_explicitBackground)
        return backgroundColor();
    return color(Grey, Shade700);
}

QColor QQuickMaterialStyle::toolBarColor() const
{
    if (m_explicitBackground)
        return backgroundColor();
    return primaryColor();
}

QColor QQuickMaterialStyle::toolTextColor() const
{
    if (m_hasForeground || m_customPrimary)
        return primaryTextColor();

    switch (m_primary) {
    case Red:
    case Pink:
    case Purple:
    case DeepPurple:
    case Indigo:
    case Blue:
    case Teal:
    case DeepOrange:
    case Brown:
    case BlueGrey:
        return QColor::fromRgba(primaryTextColorDark);

    case LightBlue:
    case Cyan:
    case Green:
    case LightGreen:
    case Lime:
    case Yellow:
    case Amber:
    case Orange:
    case Grey:
        return QColor::fromRgba(primaryTextColorLight);

    default:
        break;
    }

    return primaryTextColor();
}

QColor QQuickMaterialStyle::spinBoxDisabledIconColor() const
{
    return QColor::fromRgba(m_theme == Light ? spinBoxDisabledIconColorLight : spinBoxDisabledIconColorDark);
}

QColor QQuickMaterialStyle::sliderDisabledColor() const
{
    return QColor::fromRgba(m_theme == Light ? sliderDisabledColorLight : sliderDisabledColorDark);
}

QColor QQuickMaterialStyle::color(QQuickMaterialStyle::Color color, QQuickMaterialStyle::Shade shade) const
{
    int count = sizeof(colors) / sizeof(colors[0]);
    if (color < 0 || color >= count)
        return QColor();

    count = sizeof(colors[0]) / sizeof(colors[0][0]);
    if (shade < 0 || shade >= count)
        return QColor();

    return colors[color][shade];
}

static QColor lighterShade(const QColor &color, qreal amount)
{
    QColor hsl = color.toHsl();
    hsl.setHslF(hsl.hueF(), hsl.saturationF(), qBound<qreal>(0.0, hsl.lightnessF() + amount, 1.0), color.alphaF());
    return hsl.convertTo(color.spec());
}

static QColor darkerShade(const QColor &color, qreal amount)
{
    QColor hsl = color.toHsl();
    hsl.setHslF(hsl.hueF(), hsl.saturationF(), qBound<qreal>(0.0, hsl.lightnessF() - amount, 1.0), color.alphaF());
    return hsl.convertTo(color.spec());
}

QQuickMaterialStyle::Shade QQuickMaterialStyle::themeShade() const
{
    return m_theme == Light ? Shade500 : Shade200;
}

/*
 * The following lightness values originate from the Material Design Color Generator project.
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 mbitson
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

// Returns the same color, if shade == themeShade()
QColor QQuickMaterialStyle::shade(const QColor &color, Shade shade) const
{
    switch (shade) {
    case Shade50:
        return lighterShade(color, m_theme == Light ? 0.52 : 0.26);
    case Shade100:
        return lighterShade(color, m_theme == Light ? 0.37 : 0.11);
    case Shade200:
        return m_theme == Light ? lighterShade(color, 0.26) : color;
    case Shade300:
        return m_theme == Light ? lighterShade(color, 0.12) : darkerShade(color, 0.14);
    case Shade400:
        return m_theme == Light ? lighterShade(color, 0.06) : darkerShade(color, 0.20);
    case Shade500:
        return m_theme == Light ? color : darkerShade(color, 0.26);
    case Shade600:
        return darkerShade(color, m_theme == Light ? 0.06 : 0.32);
    case Shade700:
        return darkerShade(color, m_theme == Light ? 0.12 : 0.38);
    case Shade800:
        return darkerShade(color, m_theme == Light ? 0.18 : 0.44);
    case Shade900:
        return darkerShade(color, m_theme == Light ? 0.24 : 0.50);
    case ShadeA100:
        return lighterShade(color, m_theme == Light ? 0.54 : 0.28);
    case ShadeA200:
        return lighterShade(color, m_theme == Light ? 0.37 : 0.11);
    case ShadeA400:
        return m_theme == Light ? lighterShade(color, 0.06) : darkerShade(color, 0.20);
    case ShadeA700:
        return darkerShade(color, m_theme == Light ? 0.12 : 0.38);
    default:
        Q_UNREACHABLE();
        return QColor();
    }
}

int QQuickMaterialStyle::touchTarget() const
{
    // https://material.io/guidelines/components/buttons.html#buttons-style
    return globalVariant == Dense ? 44 : 48;
}

int QQuickMaterialStyle::buttonHeight() const
{
    // https://material.io/guidelines/components/buttons.html#buttons-style
    return globalVariant == Dense ? 32 : 36;
}

int QQuickMaterialStyle::delegateHeight() const
{
    // https://material.io/guidelines/components/lists.html#lists-specs
    return globalVariant == Dense ? 40 : 48;
}

int QQuickMaterialStyle::dialogButtonBoxHeight() const
{
    return globalVariant == Dense ? 48 : 52;
}

int QQuickMaterialStyle::frameVerticalPadding() const
{
    return globalVariant == Dense ? 8 : 12;
}

int QQuickMaterialStyle::menuItemHeight() const
{
    // https://material.io/guidelines/components/menus.html#menus-simple-menus
    return globalVariant == Dense ? 32 : 48;
}

int QQuickMaterialStyle::menuItemVerticalPadding() const
{
    return globalVariant == Dense ? 8 : 12;
}

int QQuickMaterialStyle::switchDelegateVerticalPadding() const
{
    // SwitchDelegate's indicator is much larger than the others due to the shadow,
    // so we must reduce its padding to ensure its implicitHeight is 40 when dense.
    return globalVariant == Dense ? 4 : 8;
}

int QQuickMaterialStyle::tooltipHeight() const
{
    // https://material.io/guidelines/components/tooltips.html
    return globalVariant == Dense ? 22 : 32;
}

QQuickMaterialStyle::Variant QQuickMaterialStyle::variant()
{
    return globalVariant;
}

template <typename Enum>
static Enum toEnumValue(const QByteArray &value, bool *ok)
{
    QMetaEnum enumeration = QMetaEnum::fromType<Enum>();
    return static_cast<Enum>(enumeration.keyToValue(value, ok));
}

static QByteArray resolveSetting(const QByteArray &env, const QSharedPointer<QSettings> &settings, const QString &name)
{
    QByteArray value = qgetenv(env);
#if QT_CONFIG(settings)
    if (value.isNull() && !settings.isNull())
        value = settings->value(name).toByteArray();
#endif
    return value;
}

void QQuickMaterialStyle::initGlobals()
{
    QSharedPointer<QSettings> settings = QQuickStylePrivate::settings(QStringLiteral("Material"));

    bool ok = false;
    QByteArray themeValue = resolveSetting("QT_QUICK_CONTROLS_MATERIAL_THEME", settings, QStringLiteral("Theme"));
    Theme themeEnum = toEnumValue<Theme>(themeValue, &ok);
    if (ok)
        globalTheme = effectiveTheme(themeEnum);
    else if (!themeValue.isEmpty())
        qWarning().nospace().noquote() << "Material: unknown theme value: " << themeValue;

    QByteArray variantValue = resolveSetting("QT_QUICK_CONTROLS_MATERIAL_VARIANT", settings, QStringLiteral("Variant"));
    Variant variantEnum = toEnumValue<Variant>(variantValue, &ok);
    if (ok)
        globalVariant = variantEnum;
    else if (!variantValue.isEmpty())
        qWarning().nospace().noquote() << "Material: unknown variant value: " << variantValue;

    QByteArray primaryValue = resolveSetting("QT_QUICK_CONTROLS_MATERIAL_PRIMARY", settings, QStringLiteral("Primary"));
    Color primaryEnum = toEnumValue<Color>(primaryValue, &ok);
    if (ok) {
        globalPrimaryCustom = false;
        globalPrimary = primaryEnum;
    } else {
        QColor color(primaryValue.constData());
        if (color.isValid()) {
            globalPrimaryCustom = true;
            globalPrimary = color.rgba();
        } else if (!primaryValue.isEmpty()) {
            qWarning().nospace().noquote() << "Material: unknown primary value: " << primaryValue;
        }
    }

    QByteArray accentValue = resolveSetting("QT_QUICK_CONTROLS_MATERIAL_ACCENT", settings, QStringLiteral("Accent"));
    Color accentEnum = toEnumValue<Color>(accentValue, &ok);
    if (ok) {
        globalAccentCustom = false;
        globalAccent = accentEnum;
    } else if (!accentValue.isEmpty()) {
        QColor color(accentValue.constData());
        if (color.isValid()) {
            globalAccentCustom = true;
            globalAccent = color.rgba();
        } else {
            qWarning().nospace().noquote() << "Material: unknown accent value: " << accentValue;
        }
    }

    QByteArray foregroundValue = resolveSetting("QT_QUICK_CONTROLS_MATERIAL_FOREGROUND", settings, QStringLiteral("Foreground"));
    Color foregroundEnum = toEnumValue<Color>(foregroundValue, &ok);
    if (ok) {
        globalForegroundCustom = false;
        globalForeground = foregroundEnum;
        hasGlobalForeground = true;
    } else if (!foregroundValue.isEmpty()) {
        QColor color(foregroundValue.constData());
        if (color.isValid()) {
            globalForegroundCustom = true;
            globalForeground = color.rgba();
            hasGlobalForeground = true;
        } else {
            qWarning().nospace().noquote() << "Material: unknown foreground value: " << foregroundValue;
        }
    }

    QByteArray backgroundValue = resolveSetting("QT_QUICK_CONTROLS_MATERIAL_BACKGROUND", settings, QStringLiteral("Background"));
    Color backgroundEnum = toEnumValue<Color>(backgroundValue, &ok);
    if (ok) {
        globalBackgroundCustom = false;
        globalBackground = backgroundEnum;
        hasGlobalBackground = true;
    } else if (!backgroundValue.isEmpty()) {
        QColor color(backgroundValue.constData());
        if (color.isValid()) {
            globalBackgroundCustom = true;
            globalBackground = color.rgba();
            hasGlobalBackground = true;
        } else {
            qWarning().nospace().noquote() << "Material: unknown background value: " << backgroundValue;
        }
    }
}

void QQuickMaterialStyle::attachedParentChange(QQuickAttachedObject *newParent, QQuickAttachedObject *oldParent)
{
    Q_UNUSED(oldParent);
    QQuickMaterialStyle *material = qobject_cast<QQuickMaterialStyle *>(newParent);
    if (material) {
        inheritPrimary(material->m_primary, material->m_customPrimary);
        inheritAccent(material->m_accent, material->m_customAccent);
        inheritForeground(material->m_foreground, material->m_customForeground, material->m_hasForeground);
        inheritBackground(material->m_background, material->m_customBackground, material->m_hasBackground);
        inheritTheme(material->theme());
    }
}

bool QQuickMaterialStyle::variantToRgba(const QVariant &var, const char *name, QRgb *rgba, bool *custom) const
{
    *custom = false;
    if (var.type() == QVariant::Int) {
        int val = var.toInt();
        if (val > BlueGrey) {
            qmlWarning(parent()) << "unknown Material." << name << " value: " << val;
            return false;
        }
        *rgba = val;
    } else {
        int val = QMetaEnum::fromType<Color>().keyToValue(var.toByteArray());
        if (val != -1) {
            *rgba = val;
        } else {
            QColor color(var.toString());
            if (!color.isValid()) {
                qmlWarning(parent()) << "unknown Material." << name << " value: " << var.toString();
                return false;
            }
            *custom = true;
            *rgba = color.rgba();
        }
    }
    return true;
}

QT_END_NAMESPACE