File indexing completed on 2024-12-08 03:40:51

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2020 David Faure <faure@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 */
 
 #include "widgetsuntrustedprogramhandler.h"
 
 #include <KIconLoader>
 #include <KJob>
 #include <KJobWidgets>
 #include <KLocalizedString>
 #include <KStandardGuiItem>
 
 #include <QApplication>
 #include <QDialog>
 #include <QDialogButtonBox>
 #include <QHBoxLayout>
 #include <QLabel>
 #include <QPlainTextEdit>
 #include <QPushButton>
 #include <QScreen>
 #include <QStyle>
 #include <QVBoxLayout>
 
 class KIO::WidgetsUntrustedProgramHandlerPrivate
 {
 public:
     QWidget *m_parentWidget = nullptr;
 };
 
 KIO::WidgetsUntrustedProgramHandler::WidgetsUntrustedProgramHandler(QObject *parent)
     : KIO::UntrustedProgramHandlerInterface(parent)
     , d(std::make_unique<WidgetsUntrustedProgramHandlerPrivate>())
 {
 }
 
 KIO::WidgetsUntrustedProgramHandler::~WidgetsUntrustedProgramHandler()
 {
 }
 
 // Simple QDialog that resizes the given text edit after being shown to more
 // or less fit the enclosed text.
 class SecureMessageDialog : public QDialog
 {
     Q_OBJECT
 public:
     explicit SecureMessageDialog(QWidget *parent)
         : QDialog(parent)
         , m_textEdit(nullptr)
     {
     }
 
     void setTextEdit(QPlainTextEdit *textEdit)
     {
         m_textEdit = textEdit;
     }
 
 protected:
     void showEvent(QShowEvent *e) override
     {
         if (e->spontaneous()) {
             return;
         }
 
         // Now that we're shown, use our width to calculate a good
         // bounding box for the text, and resize m_textEdit appropriately.
         QDialog::showEvent(e);
 
         if (!m_textEdit) {
             return;
         }
 
         QSize fudge(20, 24); // About what it sounds like :-/
 
         // Form rect with a lot of height for bounding.  Use no more than
         // 5 lines.
         QRect curRect(m_textEdit->rect());
         QFontMetrics metrics(fontMetrics());
         curRect.setHeight(5 * metrics.lineSpacing());
         curRect.setWidth(qMax(curRect.width(), 300)); // At least 300 pixels ok?
 
         QString text(m_textEdit->toPlainText());
         curRect = metrics.boundingRect(curRect, Qt::TextWordWrap | Qt::TextSingleLine, text);
 
         // Scroll bars interfere.  If we don't think there's enough room, enable
         // the vertical scrollbar however.
         m_textEdit->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
         if (curRect.height() < m_textEdit->height()) { // then we've got room
             m_textEdit->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
             m_textEdit->setMaximumHeight(curRect.height() + fudge.height());
         }
 
         m_textEdit->setMinimumSize(curRect.size() + fudge);
         m_textEdit->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Minimum);
     }
 
 private:
     QPlainTextEdit *m_textEdit;
 };
 
 QDialog *KIO::WidgetsUntrustedProgramHandler::createDialog(QWidget *parentWidget, const QString &programName)
 {
     SecureMessageDialog *baseDialog = new SecureMessageDialog(parentWidget);
     baseDialog->setWindowTitle(i18nc("Warning about executing unknown program", "Warning"));
 
     QVBoxLayout *topLayout = new QVBoxLayout(baseDialog);
 
     // Dialog will have explanatory text with a disabled lineedit with the
     // Exec= to make it visually distinct.
     QWidget *baseWidget = new QWidget(baseDialog);
     QHBoxLayout *mainLayout = new QHBoxLayout(baseWidget);
 
     QLabel *iconLabel = new QLabel(baseWidget);
     const QIcon icon = baseDialog->style()->standardIcon(QStyle::SP_MessageBoxWarning, nullptr, baseDialog);
     const QPixmap warningIcon(icon.pixmap(KIconLoader::SizeHuge));
     mainLayout->addWidget(iconLabel);
     iconLabel->setPixmap(warningIcon);
 
     QVBoxLayout *contentLayout = new QVBoxLayout;
     QString warningMessage = i18nc("program name follows in a line edit below", "This will start the program:");
 
     QLabel *message = new QLabel(warningMessage, baseWidget);
     contentLayout->addWidget(message);
 
     QPlainTextEdit *textEdit = new QPlainTextEdit(baseWidget);
     textEdit->setPlainText(programName);
     textEdit->setReadOnly(true);
     contentLayout->addWidget(textEdit);
 
     QLabel *footerLabel = new QLabel(i18n("If you do not trust this program, click Cancel"));
     contentLayout->addWidget(footerLabel);
     contentLayout->addStretch(0); // Don't allow the text edit to expand
 
     mainLayout->addLayout(contentLayout);
 
     topLayout->addWidget(baseWidget);
     baseDialog->setTextEdit(textEdit);
 
     QDialogButtonBox *buttonBox = new QDialogButtonBox(baseDialog);
     buttonBox->setStandardButtons(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
     KGuiItem::assign(buttonBox->button(QDialogButtonBox::Ok), KStandardGuiItem::cont());
     buttonBox->button(QDialogButtonBox::Cancel)->setDefault(true);
     buttonBox->button(QDialogButtonBox::Cancel)->setFocus();
     QObject::connect(buttonBox, &QDialogButtonBox::accepted, baseDialog, &QDialog::accept);
     QObject::connect(buttonBox, &QDialogButtonBox::rejected, baseDialog, &QDialog::reject);
     topLayout->addWidget(buttonBox);
 
     // Constrain maximum size.  Minimum size set in
     // the dialog's show event.
     const QSize screenSize = baseDialog->screen()->size();
     baseDialog->resize(screenSize.width() / 4, 50);
     baseDialog->setMaximumHeight(screenSize.height() / 3);
     baseDialog->setMaximumWidth(screenSize.width() / 10 * 8);
 
     baseDialog->setAttribute(Qt::WA_DeleteOnClose);
     return baseDialog;
 }
 
 void KIO::WidgetsUntrustedProgramHandler::showUntrustedProgramWarning(KJob *job, const QString &programName)
 {
     QWidget *parentWidget = nullptr;
 
     if (job) {
         parentWidget = KJobWidgets::window(job);
     }
 
     if (!parentWidget) {
         parentWidget = d->m_parentWidget;
     }
 
     if (!parentWidget) {
         parentWidget = qApp->activeWindow();
     }
 
     QDialog *dialog = createDialog(parentWidget, programName);
     connect(dialog, &QDialog::accepted, this, [this]() {
         Q_EMIT result(true);
     });
     connect(dialog, &QDialog::rejected, this, [this]() {
         Q_EMIT result(false);
     });
     dialog->show();
 }
 
 bool KIO::WidgetsUntrustedProgramHandler::execUntrustedProgramWarning(QWidget *window, const QString &programName)
 {
     QDialog *dialog = createDialog(window, programName);
     return dialog->exec() == QDialog::Accepted;
 }
 
 void KIO::WidgetsUntrustedProgramHandler::setWindow(QWidget *window)
 {
     d->m_parentWidget = window;
 }
 
 #include "moc_widgetsuntrustedprogramhandler.cpp"
 #include "widgetsuntrustedprogramhandler.moc"