webarchiver: Disable the "Create" button if no valid source URL

plugins/webarchiver/app/archivedialog.cpp

@@ -109,9 +109,6 @@ ArchiveDialog::ArchiveDialog(const QUrl &url, QWidget *parent)
     Q_ASSERT(m_cancelButton!=nullptr);
     connect(m_cancelButton, &QAbstractButton::clicked, this, &QWidget::close);
 
-    // TODO: verify user entries, enable/disable button
-    //enableButtonOk(false);
-
     QWidget *w = new QWidget(this);			// main widget
     QVBoxLayout *vbl = new QVBoxLayout(w);		// main vertical layout
     KConfigSkeletonItem *ski;				// config for creating widgets
@@ -121,6 +118,8 @@ ArchiveDialog::ArchiveDialog(const QUrl &url, QWidget *parent)
 
     m_pageUrlReq = new KUrlRequester(url, this);
     m_pageUrlReq->setToolTip(i18n("The URL of the page that is to be archived"));
+    slotSourceUrlChanged(m_pageUrlReq->text());
+    connect(m_pageUrlReq, &KUrlRequester::textChanged, this, &ArchiveDialog::slotSourceUrlChanged);
     fl->addRow(i18n("Source &URL:"), m_pageUrlReq);
 
     fl->addRow(QString(), new QWidget(this));
@@ -252,6 +251,12 @@ void ArchiveDialog::cleanup()
 }
 
 
+void ArchiveDialog::slotSourceUrlChanged(const QString &text)
+{
+    m_archiveButton->setEnabled(QUrl::fromUserInput(text).isValid());
+}
+
+
 void ArchiveDialog::slotArchiveTypeChanged(int idx)
 {
     const QString saveType = m_typeCombo->itemData(idx).toString();

plugins/webarchiver/app/archivedialog.h

@@ -58,6 +58,7 @@ protected:
 
 protected slots:
     void slotArchiveTypeChanged(int idx);
+    void slotSourceUrlChanged(const QString &text);
     void slotMessageLinkActivated(const QString &link);
 
 private slots: