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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qquickpalettecolorprovider_p.h"
#include <QtQuick/private/qquickabstractpaletteprovider_p.h>
#include <QtGui/private/qpalette_p.h>
QT_BEGIN_NAMESPACE
static bool notEq(const QPalette &p1, const QPalette &p2)
{
return p1.resolveMask() != p2.resolveMask() || p1 != p2;
}
static QPalette::ColorGroup adjustCg(QPalette::ColorGroup group)
{
return group == QPalette::All ? QPalette::Active : group;
}
class DefaultPalettesProvider : public QQuickAbstractPaletteProvider
{
public:
QPalette defaultPalette() const override { static QPalette p; return p; }
};
static std::default_delete<const QQuickAbstractPaletteProvider> defaultDeleter() { return {}; }
QQuickPaletteColorProvider::QQuickPaletteColorProvider()
: m_paletteProvider(ProviderPtr(new DefaultPalettesProvider, defaultDeleter()))
{
}
const QColor &QQuickPaletteColorProvider::color(QPalette::ColorGroup group, QPalette::ColorRole role) const
{
return m_resolvedPalette.color(adjustCg(group), role);
}
bool QQuickPaletteColorProvider::setColor(QPalette::ColorGroup g, QPalette::ColorRole r, QColor c)
{
ensureRequestedPalette();
m_requestedPalette->setColor(g, r, c);
return updateInheritedPalette();
}
bool QQuickPaletteColorProvider::resetColor(QPalette::ColorGroup group, QPalette::ColorRole role)
{
if (!m_requestedPalette.isAllocated())
return false;
QPalette::ResolveMask unsetResolveMask = 0;
if (group == QPalette::Current)
group = m_requestedPalette->currentColorGroup();
if (group == QPalette::All) {
for (int g = QPalette::Active; g < QPalette::NColorGroups; ++g)
unsetResolveMask |= (QPalette::ResolveMask(1) << QPalettePrivate::bitPosition(QPalette::ColorGroup(g), role));
} else {
unsetResolveMask = (QPalette::ResolveMask(1) << QPalettePrivate::bitPosition(group, role));
}
m_requestedPalette->setResolveMask(m_requestedPalette->resolveMask() & ~unsetResolveMask);
return updateInheritedPalette();
}
bool QQuickPaletteColorProvider::resetColor(QPalette::ColorGroup group)
{
if (!m_requestedPalette.isAllocated())
return false;
QPalette::ResolveMask unsetResolveMask = 0;
auto getResolveMask = [] (QPalette::ColorGroup group) {
QPalette::ResolveMask mask = 0;
for (int roleIndex = QPalette::WindowText; roleIndex < QPalette::NColorRoles; ++roleIndex) {
const auto cr = QPalette::ColorRole(roleIndex);
mask |= (QPalette::ResolveMask(1) << QPalettePrivate::bitPosition(group, cr));
}
return mask;
};
if (group == QPalette::Current)
group = m_requestedPalette->currentColorGroup();
if (group == QPalette::All) {
for (int g = QPalette::Active; g < QPalette::NColorGroups; ++g)
unsetResolveMask |= getResolveMask(QPalette::ColorGroup(g));
} else {
unsetResolveMask = getResolveMask(group);
}
m_requestedPalette->setResolveMask(m_requestedPalette->resolveMask() & ~unsetResolveMask);
return updateInheritedPalette();
}
bool QQuickPaletteColorProvider::fromQPalette(QPalette p)
{
m_requestedPalette.value() = std::move(p);
return updateInheritedPalette();
}
QPalette QQuickPaletteColorProvider::palette() const
{
return m_resolvedPalette;
}
const QQuickAbstractPaletteProvider *QQuickPaletteColorProvider::paletteProvider() const
{
Q_ASSERT(m_paletteProvider);
return m_paletteProvider.get();
}
void QQuickPaletteColorProvider::setPaletteProvider(const QQuickAbstractPaletteProvider *paletteProvider)
{
static const auto emptyDeleter = [](auto &&){};
m_paletteProvider = ProviderPtr(paletteProvider, emptyDeleter);
}
bool QQuickPaletteColorProvider::copyColorGroup(QPalette::ColorGroup cg,
const QQuickPaletteColorProvider &p)
{
ensureRequestedPalette();
auto srcPalette = p.palette();
for (int roleIndex = QPalette::WindowText; roleIndex < QPalette::NColorRoles; ++roleIndex) {
const auto cr = QPalette::ColorRole(roleIndex);
if (srcPalette.isBrushSet(cg, cr)) {
m_requestedPalette->setBrush(cg, cr, srcPalette.brush(cg, cr));
}
}
return updateInheritedPalette();
}
bool QQuickPaletteColorProvider::reset()
{
return fromQPalette(QPalette());
}
/*! \internal
Merge the given \a palette with the existing requested palette, remember
that it is the inherited palette (in case updateInheritedPalette() is
called later), and update the stored palette (to be returned from
\l palette()) if the result is different. Returns whether the stored
palette got changed.
*/
bool QQuickPaletteColorProvider::inheritPalette(const QPalette &palette)
{
m_lastInheritedPalette.value() = palette;
return doInheritPalette(palette);
}
/*! \internal
Merge the given \a palette with the existing requested palette, and update
the stored palette (to be returned from \l palette()) if the result is
different. Returns whether the stored palette got changed.
*/
bool QQuickPaletteColorProvider::doInheritPalette(const QPalette &palette)
{
auto inheritedMask = m_requestedPalette.isAllocated() ? m_requestedPalette->resolveMask() | palette.resolveMask()
: palette.resolveMask();
QPalette parentPalette = m_requestedPalette.isAllocated() ? m_requestedPalette->resolve(palette) : palette;
parentPalette.setResolveMask(inheritedMask);
auto tmpResolvedPalette = parentPalette.resolve(paletteProvider()->defaultPalette());
tmpResolvedPalette.setResolveMask(tmpResolvedPalette.resolveMask() | inheritedMask);
bool changed = notEq(tmpResolvedPalette, m_resolvedPalette);
if (changed)
std::swap(tmpResolvedPalette, m_resolvedPalette);
return changed;
}
/*! \internal
Update the stored palette (to be returned from \l palette()) from the
parent palette. Returns whether the stored palette got changed.
*/
bool QQuickPaletteColorProvider::updateInheritedPalette()
{
// Use last inherited palette as parentPalette's fallbackPalette: it's useful when parentPalette doesn't exist.
const QPalette &p = m_lastInheritedPalette.isAllocated() ? m_lastInheritedPalette.value()
: paletteProvider()->defaultPalette();
return doInheritPalette(paletteProvider()->parentPalette(p));
}
void QQuickPaletteColorProvider::ensureRequestedPalette()
{
if (m_requestedPalette.isAllocated())
return;
m_requestedPalette.value() = QPalette();
}
QT_END_NAMESPACE
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