606fe3d022
Prevents this: user paste image (image provider retrieves the clipboard image to show it as a thumbnail), and immediatly presses enter (retrieves the image to convert it and send to Python); the two calls would run at the same time instead of one waiting for the other to set the cache.
118 lines
3.0 KiB
C++
118 lines
3.0 KiB
C++
// SPDX-License-Identifier: LGPL-3.0-or-later
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// The Clipboard class exposes system clipboard management and retrieval
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// to QML.
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#ifndef CLIPBOARD_H
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#define CLIPBOARD_H
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#include <QBuffer>
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#include <QByteArray>
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#include <QClipboard>
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#include <QGuiApplication>
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#include <QIODevice>
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#include <QImage>
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#include <QMimeData>
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#include <QMutex>
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#include <QMutexLocker>
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#include <QObject>
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class Clipboard : public QObject {
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Q_OBJECT
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Q_PROPERTY(QString text READ text WRITE setText NOTIFY textChanged)
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Q_PROPERTY(QByteArray image READ image WRITE setImage NOTIFY imageChanged)
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Q_PROPERTY(bool hasImage READ hasImage NOTIFY hasImageChanged)
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Q_PROPERTY(QString selection READ selection WRITE setSelection
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NOTIFY selectionChanged)
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Q_PROPERTY(bool supportsSelection READ supportsSelection CONSTANT)
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public:
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explicit Clipboard(QObject *parent = nullptr) : QObject(parent) {
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connect(this->clipboard, &QClipboard::dataChanged,
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this, &Clipboard::mainClipboardChanged);
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connect(this->clipboard, &QClipboard::selectionChanged,
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this, &Clipboard::selectionChanged);
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}
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// Normal primary clipboard
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QString text() const {
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return this->clipboard->text(QClipboard::Clipboard);
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}
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void setText(const QString &text) const {
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this->clipboard->setText(text, QClipboard::Clipboard);
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}
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QImage *qimage() {
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QMutexLocker locker(&(this->imageRetrievalLock));
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if (this->cachedImage.isNull())
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this->cachedImage = this->clipboard->image();
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return &(this->cachedImage);
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}
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QByteArray image() {
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QByteArray byteArray;
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QBuffer buffer(&byteArray);
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buffer.open(QIODevice::WriteOnly);
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QImage *image = this->qimage();
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// minimum compression, fastest to not freeze the UI
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image->save(&buffer, "PNG", 100);
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buffer.close();
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return byteArray;
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}
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void setImage(const QByteArray &image) const { // TODO
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Q_UNUSED(image)
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}
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bool hasImage() const {
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return this->clipboard->mimeData()->hasImage();
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}
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// X11 select-middle-click-paste clipboard
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QString selection() const {
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return this->clipboard->text(QClipboard::Selection);
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}
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void setSelection(const QString &text) const {
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if (this->clipboard->supportsSelection()) {
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this->clipboard->setText(text, QClipboard::Selection);
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}
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}
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// Info
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bool supportsSelection() const {
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return this->clipboard->supportsSelection();
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}
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signals:
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void contentChanged();
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void textChanged();
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void imageChanged();
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void hasImageChanged();
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void selectionChanged();
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private:
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QClipboard *clipboard = QGuiApplication::clipboard();
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QImage cachedImage = QImage();
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QMutex imageRetrievalLock;
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void mainClipboardChanged() {
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this->contentChanged();
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this->cachedImage = QImage();
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this->hasImage() ? this->imageChanged() : this->textChanged();
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this->hasImageChanged();
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};
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};
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#endif
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