qquickvectorimage.cpp

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// Copyright (C) 2024 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 "qquickvectorimage_p.h"
#include "qquickvectorimage_p_p.h"
#include <QtQuickVectorImageGenerator/private/qquickitemgenerator_p.h>
#include <QtQuickVectorImageGenerator/private/qquickvectorimageglobal_p.h>
#include <QtCore/qloggingcategory.h>
 
#include <private/qquicktranslate_p.h>
 
QT_BEGIN_NAMESPACE
 
Q_LOGGING_CATEGORY(lcQuickVectorImage, "qt.quick.vectorimage", QtWarningMsg)
 
void QQuickVectorImagePrivate::setSource(const QUrl &source)
{
    Q_Q(QQuickVectorImage);
    if (sourceFile == source)
        return;
 
    sourceFile = source;
    loadSvg();
    emit q->sourceChanged();
}
 
void QQuickVectorImagePrivate::loadSvg()
{
    Q_Q(QQuickVectorImage);
 
    QUrl resolvedUrl = qmlContext(q)->resolvedUrl(sourceFile);
    QString localFile = QQmlFile::urlToLocalFileOrQrc(resolvedUrl);
 
    if (localFile.isEmpty())
        return;
 
    QQuickVectorImagePrivate::Format fileFormat = formatFromFilePath(localFile);
 
    if (fileFormat != QQuickVectorImagePrivate::Format::Svg) {
        qCWarning(lcQuickVectorImage) << "Unsupported file format";
        return;
    }
 
    if (svgItem)
        svgItem->deleteLater();
 
    svgItem = new QQuickItem(q);
 
    QQuickVectorImageGenerator::GeneratorFlags flags;
    flags.setFlag(QQuickVectorImageGenerator::CurveRenderer);
    QQuickItemGenerator generator(localFile, flags, svgItem);
    generator.generate();
 
    svgItem->setParentItem(q);
    q->setImplicitWidth(svgItem->width());
    q->setImplicitHeight(svgItem->height());
 
    q->updateSvgItemScale();
 
    q->update();
}
 
QQuickVectorImagePrivate::Format QQuickVectorImagePrivate::formatFromFilePath(const QString &filePath)
{
    Q_UNUSED(filePath)
 
    QQuickVectorImagePrivate::Format res = QQuickVectorImagePrivate::Format::Unknown;
 
    if (filePath.endsWith(QLatin1String(".svg")) || filePath.endsWith(QLatin1String(".svgz"))
        || filePath.endsWith(QLatin1String(".svg.gz"))) {
        res = QQuickVectorImagePrivate::Format::Svg;
    }
 
    return res;
}
 
QQuickVectorImage::QQuickVectorImage(QQuickItem *parent)
    : QQuickItem(*(new QQuickVectorImagePrivate), parent)
{
    setFlag(QQuickItem::ItemHasContents, true);
 
    QObject::connect(this, &QQuickItem::widthChanged, this, &QQuickVectorImage::updateSvgItemScale);
    QObject::connect(this, &QQuickItem::heightChanged, this, &QQuickVectorImage::updateSvgItemScale);
    QObject::connect(this, &QQuickVectorImage::fillModeChanged, this, &QQuickVectorImage::updateSvgItemScale);
}
 
QUrl QQuickVectorImage::source() const
{
    Q_D(const QQuickVectorImage);
    return d->sourceFile;
}
 
void QQuickVectorImage::setSource(const QUrl &source)
{
    Q_D(QQuickVectorImage);
    d->setSource(source);
}
 
void QQuickVectorImage::updateSvgItemScale()
{
    Q_D(QQuickVectorImage);
 
    if (d->svgItem == nullptr
        || qFuzzyIsNull(d->svgItem->width())
        || qFuzzyIsNull(d->svgItem->height())) {
        return;
    }
 
    auto xformProp = d->svgItem->transform();
    QQuickScale *scaleTransform = nullptr;
    if (xformProp.count(&xformProp) == 0) {
        scaleTransform = new QQuickScale;
        scaleTransform->setParent(d->svgItem);
        xformProp.append(&xformProp, scaleTransform);
    } else {
        scaleTransform = qobject_cast<QQuickScale *>(xformProp.at(&xformProp, 0));
    }
 
    if (scaleTransform != nullptr) {
        qreal xScale = width() / d->svgItem->width();
        qreal yScale = height() / d->svgItem->height();
 
        switch (d->fillMode) {
        case QQuickVectorImage::NoResize:
            xScale = yScale = 1.0;
            break;
        case QQuickVectorImage::PreserveAspectFit:
            xScale = yScale = qMin(xScale, yScale);
            break;
        case QQuickVectorImage::PreserveAspectCrop:
            xScale = yScale = qMax(xScale, yScale);
            break;
        case QQuickVectorImage::Stretch:
            // Already correct
            break;
        };
 
        scaleTransform->setXScale(xScale);
        scaleTransform->setYScale(yScale);
    }
}
 
QQuickVectorImage::FillMode QQuickVectorImage::fillMode() const
{
    Q_D(const QQuickVectorImage);
    return d->fillMode;
}
 
void QQuickVectorImage::setFillMode(FillMode newFillMode)
{
    Q_D(QQuickVectorImage);
    if (d->fillMode == newFillMode)
        return;
    d->fillMode = newFillMode;
    emit fillModeChanged();
}
 
QT_END_NAMESPACE