Settings dialog: Move detailed version info from About section to Legal notice dialog

- Enlarge dialog widget to show full content
- Implement Dark-/Light-Mode switching (hyperlinks)

Signed-off-by: Michael Schuster <michael@schuster.ms>

src/gui/legalnotice.cpp

@@ -14,6 +14,7 @@
 
 #include "legalnotice.h"
 #include "ui_legalnotice.h"
+#include "theme.h"
 
 namespace OCC {
 
@@ -24,16 +25,9 @@ LegalNotice::LegalNotice(QDialog *parent)
 {
     _ui->setupUi(this);
 
-    QString notice = tr("<p>Copyright 2017-2020 Nextcloud GmbH<br />"
-                        "Copyright 2012-2018 ownCloud GmbH</p>");
-
-    notice += tr("<p>Licensed under the GNU General Public License (GPL) Version 2.0 or any later version.</p>");
-
-    _ui->notice->setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::TextBrowserInteraction);
-    _ui->notice->setText(notice);
-    _ui->notice->setWordWrap(true);
-
     connect(_ui->closeButton, &QPushButton::clicked, this, &LegalNotice::accept);
+
+    customizeStyle();
 }
 
 LegalNotice::~LegalNotice()
@@ -41,4 +35,37 @@ LegalNotice::~LegalNotice()
     delete _ui;
 }
 
+void LegalNotice::changeEvent(QEvent *e)
+{
+    switch (e->type()) {
+    case QEvent::StyleChange:
+    case QEvent::PaletteChange:
+    case QEvent::ThemeChange:
+        customizeStyle();
+        break;
+    default:
+        break;
+    }
+
+    QDialog::changeEvent(e);
 }
+
+void LegalNotice::customizeStyle()
+{
+    QString notice = tr("<p>Copyright 2017-2020 Nextcloud GmbH<br />"
+                        "Copyright 2012-2018 ownCloud GmbH</p>");
+
+    notice += tr("<p>Licensed under the GNU General Public License (GPL) Version 2.0 or any later version.</p>");
+
+    notice += "<p>&nbsp;</p>";
+    notice += Theme::instance()->aboutDetails();
+
+    Theme::replaceLinkColorStringBackgroundAware(notice);
+
+    _ui->notice->setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::TextBrowserInteraction);
+    _ui->notice->setText(notice);
+    _ui->notice->setWordWrap(true);
+    _ui->notice->setOpenExternalLinks(true);
+}
+
+} // namespace OCC

src/gui/legalnotice.h

@@ -37,7 +37,12 @@ public:
     explicit LegalNotice(QDialog *parent = nullptr);
     ~LegalNotice();
 
+protected:
+    void changeEvent(QEvent *) override;
+
 private:
+    void customizeStyle();
+
     Ui::LegalNotice *_ui;
 };
 

src/gui/legalnotice.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>291</width>
-    <height>260</height>
+    <width>591</width>
+    <height>360</height>
    </rect>
   </property>
   <property name="windowTitle">