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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
// Qt-Security score:significant reason:default
#include "qqc2qstyle_p.h"
#include "qqc2qstyle_p_p.h"
#include <qpa/qplatformtheme.h>
#include <private/qguiapplication_p.h>
#include <private/qqc2qstyleoption_p.h>
#include <QtGui/qpainter.h>
#include <QtGui/qbitmap.h>
#include <QtGui/qpixmapcache.h>
#ifndef QT_NO_DEBUG
# include <QtCore/qdebug.h>
#endif
#include <limits.h>
#include <algorithm>
QT_BEGIN_NAMESPACE
namespace QQC2 {
/*!
\internal
Constructs a style object.
*/
QStyle::QStyle()
: QObject(*new QStylePrivate)
{
Q_D(QStyle);
d->proxyStyle = this;
}
/*!
\internal
Constructs a style object.
*/
QStyle::QStyle(QStylePrivate &dd)
: QObject(dd)
{
Q_D(QStyle);
d->proxyStyle = this;
}
/*!
\internal
Destroys the style object.
*/
QStyle::~QStyle()
{
}
/*!
\internal
Returns the area within the given \a rectangle in which to draw
the provided \a text according to the specified font \a metrics
and \a alignment. The \a enabled parameter indicates whether or
not the associated item is enabled.
If the given \a rectangle is larger than the area needed to render
the \a text, the rectangle that is returned will be offset within
\a rectangle according to the specified \a alignment. For
example, if \a alignment is Qt::AlignCenter, the returned
rectangle will be centered within \a rectangle. If the given \a
rectangle is smaller than the area needed, the returned rectangle
will be the smallest rectangle large enough to render the \a text.
\sa Qt::Alignment
*/
QRect QStyle::itemTextRect(const QFontMetrics &metrics, const QRect &rect, int alignment, bool enabled,
const QString &text) const
{
QRect result;
int x, y, w, h;
rect.getRect(&x, &y, &w, &h);
if (!text.isEmpty()) {
result = metrics.boundingRect(x, y, w, h, alignment, text);
if (!enabled && proxy()->styleHint(SH_EtchDisabledText)) {
result.setWidth(result.width()+1);
result.setHeight(result.height()+1);
}
} else {
result = QRect(x, y, w, h);
}
return result;
}
/*!
\internal
Returns the area within the given \a rectangle in which to draw
the specified \a pixmap according to the defined \a alignment.
*/
QRect QStyle::itemPixmapRect(const QRect &rect, int alignment, const QPixmap &pixmap) const
{
QRect result;
int x, y, w, h;
rect.getRect(&x, &y, &w, &h);
const int pixmapWidth = pixmap.width()/pixmap.devicePixelRatio();
const int pixmapHeight = pixmap.height()/pixmap.devicePixelRatio();
if ((alignment & Qt::AlignVCenter) == Qt::AlignVCenter)
y += h/2 - pixmapHeight/2;
else if ((alignment & Qt::AlignBottom) == Qt::AlignBottom)
y += h - pixmapHeight;
if ((alignment & Qt::AlignRight) == Qt::AlignRight)
x += w - pixmapWidth;
else if ((alignment & Qt::AlignHCenter) == Qt::AlignHCenter)
x += w/2 - pixmapWidth/2;
else if ((alignment & Qt::AlignLeft) != Qt::AlignLeft && QGuiApplication::isRightToLeft())
x += w - pixmapWidth;
result = QRect(x, y, pixmapWidth, pixmapHeight);
return result;
}
/*!
\internal
Draws the given \a text in the specified \a rectangle using the
provided \a painter and \a palette.
The text is drawn using the painter's pen, and aligned and wrapped
according to the specified \a alignment. If an explicit \a
textRole is specified, the text is drawn using the \a palette's
color for the given role. The \a enabled parameter indicates
whether or not the item is enabled; when reimplementing this
function, the \a enabled parameter should influence how the item is
drawn.
\sa Qt::Alignment, drawItemPixmap()
*/
void QStyle::drawItemText(QPainter *painter, const QRect &rect, int alignment, const QPalette &pal,
bool enabled, const QString& text, QPalette::ColorRole textRole) const
{
if (text.isEmpty())
return;
QPen savedPen;
if (textRole != QPalette::NoRole) {
savedPen = painter->pen();
painter->setPen(QPen(pal.brush(textRole), savedPen.widthF()));
}
if (!enabled) {
if (proxy()->styleHint(SH_DitherDisabledText)) {
QRect br;
painter->drawText(rect, alignment, text, &br);
painter->fillRect(br, QBrush(painter->background().color(), Qt::Dense5Pattern));
return;
} else if (proxy()->styleHint(SH_EtchDisabledText)) {
QPen pen = painter->pen();
painter->setPen(pal.light().color());
painter->drawText(rect.adjusted(1, 1, 1, 1), alignment, text);
painter->setPen(pen);
}
}
painter->drawText(rect, alignment, text);
if (textRole != QPalette::NoRole)
painter->setPen(savedPen);
}
/*!
\internal
Draws the given \a pixmap in the specified \a rectangle, according
to the specified \a alignment, using the provided \a painter.
\sa drawItemText()
*/
void QStyle::drawItemPixmap(QPainter *painter, const QRect &rect, int alignment,
const QPixmap &pixmap) const
{
qreal scale = pixmap.devicePixelRatio();
QRect aligned = alignedRect(QGuiApplication::layoutDirection(), QFlag(alignment), pixmap.size() / scale, rect);
QRect inter = aligned.intersected(rect);
painter->drawPixmap(inter.x(), inter.y(), pixmap, inter.x() - aligned.x(), inter.y() - aligned.y(), inter.width() * scale, inter.height() *scale);
}
/*!
\internal
Returns the given \a logicalRectangle converted to screen
coordinates based on the specified \a direction. The \a
boundingRectangle is used when performing the translation.
This function is provided to support right-to-left desktops, and
is typically used in implementations of the subControlRect()
function.
\sa QWidget::layoutDirection
*/
QRect QStyle::visualRect(Qt::LayoutDirection direction, const QRect &boundingRect, const QRect &logicalRect)
{
if (direction == Qt::LeftToRight)
return logicalRect;
QRect rect = logicalRect;
rect.translate(2 * (boundingRect.right() - logicalRect.right()) +
logicalRect.width() - boundingRect.width(), 0);
return rect;
}
/*!
\internal
Returns the given \a logicalPosition converted to screen
coordinates based on the specified \a direction. The \a
boundingRectangle is used when performing the translation.
\sa QWidget::layoutDirection
*/
QPoint QStyle::visualPos(Qt::LayoutDirection direction, const QRect &boundingRect, const QPoint &logicalPos)
{
if (direction == Qt::LeftToRight)
return logicalPos;
return QPoint(boundingRect.right() - logicalPos.x(), logicalPos.y());
}
/*!
\internal
Returns a new rectangle of the specified \a size that is aligned to the given \a
rectangle according to the specified \a alignment and \a direction.
*/
QRect QStyle::alignedRect(Qt::LayoutDirection direction, Qt::Alignment alignment, const QSize &size, const QRect &rectangle)
{
alignment = visualAlignment(direction, alignment);
int x = rectangle.x();
int y = rectangle.y();
int w = size.width();
int h = size.height();
if ((alignment & Qt::AlignVCenter) == Qt::AlignVCenter)
y += rectangle.size().height()/2 - h/2;
else if ((alignment & Qt::AlignBottom) == Qt::AlignBottom)
y += rectangle.size().height() - h;
if ((alignment & Qt::AlignRight) == Qt::AlignRight)
x += rectangle.size().width() - w;
else if ((alignment & Qt::AlignHCenter) == Qt::AlignHCenter)
x += rectangle.size().width()/2 - w/2;
return QRect(x, y, w, h);
}
/*!
\internal
Transforms an \a alignment of Qt::AlignLeft or Qt::AlignRight
without Qt::AlignAbsolute into Qt::AlignLeft or Qt::AlignRight with
Qt::AlignAbsolute according to the layout \a direction. The other
alignment flags are left untouched.
If no horizontal alignment was specified, the function returns the
default alignment for the given layout \a direction.
QWidget::layoutDirection
*/
Qt::Alignment QStyle::visualAlignment(Qt::LayoutDirection direction, Qt::Alignment alignment)
{
return QGuiApplicationPrivate::visualAlignment(direction, alignment);
}
/*!
\internal
Converts the given \a logicalValue to a pixel position. The \a min
parameter maps to 0, \a max maps to \a span and other values are
distributed evenly in-between.
This function can handle the entire integer range without
overflow, providing that \a span is less than 4096.
By default, this function assumes that the maximum value is on the
right for horizontal items and on the bottom for vertical items.
Set the \a upsideDown parameter to true to reverse this behavior.
\sa sliderValueFromPosition()
*/
int QStyle::sliderPositionFromValue(int min, int max, int logicalValue, int span, bool upsideDown)
{
if (span <= 0 || logicalValue < min || max <= min)
return 0;
if (logicalValue > max)
return upsideDown ? span : min;
uint range = max - min;
uint p = upsideDown ? max - logicalValue : logicalValue - min;
if (range > (uint)INT_MAX/4096) {
double dpos = (double(p))/(double(range)/span);
return int(dpos);
} else if (range > (uint)span) {
return (2 * p * span + range) / (2*range);
} else {
uint div = span / range;
uint mod = span % range;
return p * div + (2 * p * mod + range) / (2 * range);
}
// equiv. to (p * span) / range + 0.5
// no overflow because of this implicit assumption:
// span <= 4096
}
/*!
\internal
Converts the given pixel \a position to a logical value. 0 maps to
the \a min parameter, \a span maps to \a max and other values are
distributed evenly in-between.
This function can handle the entire integer range without
overflow.
By default, this function assumes that the maximum value is on the
right for horizontal items and on the bottom for vertical
items. Set the \a upsideDown parameter to true to reverse this
behavior.
\sa sliderPositionFromValue()
*/
int QStyle::sliderValueFromPosition(int min, int max, int pos, int span, bool upsideDown)
{
if (span <= 0 || pos <= 0)
return upsideDown ? max : min;
if (pos >= span)
return upsideDown ? min : max;
uint range = max - min;
if ((uint)span > range) {
int tmp = (2 * pos * range + span) / (2 * span);
return upsideDown ? max - tmp : tmp + min;
} else {
uint div = range / span;
uint mod = range % span;
int tmp = pos * div + (2 * pos * mod + span) / (2 * span);
return upsideDown ? max - tmp : tmp + min;
}
// equiv. to min + (pos*range)/span + 0.5
// no overflow because of this implicit assumption:
// pos <= span < sqrt(INT_MAX+0.0625)+0.25 ~ sqrt(INT_MAX)
}
/*!
\internal
Returns the style's standard palette.
Note that on systems that support system colors, the style's
standard palette is not used. In particular, the Windows
Vista and Mac styles do not use the standard palette, but make
use of native theme engines. With these styles, you should not set
the palette with QApplication::setPalette().
\sa QApplication::setPalette()
*/
QPalette QStyle::standardPalette() const
{
QColor background = QColor(0xd4, 0xd0, 0xc8); // win 2000 grey
QColor light(background.lighter());
QColor dark(background.darker());
QColor mid(Qt::gray);
QPalette palette(Qt::black, background, light, dark, mid, Qt::black, Qt::white);
palette.setBrush(QPalette::Disabled, QPalette::WindowText, dark);
palette.setBrush(QPalette::Disabled, QPalette::Text, dark);
palette.setBrush(QPalette::Disabled, QPalette::ButtonText, dark);
palette.setBrush(QPalette::Disabled, QPalette::Base, background);
return palette;
}
//Windows and KDE allow menus to cover the taskbar, while GNOME and macOS don't
bool QStylePrivate::useFullScreenForPopup()
{
auto theme = QGuiApplicationPrivate::platformTheme();
return theme && theme->themeHint(QPlatformTheme::UseFullScreenForPopupMenu).toBool();
}
} // namespace QQC2
QT_END_NAMESPACE
#include "moc_qqc2qstyle_p.cpp"