Implement "goldendict://nice" url scheme handler for windows and linux (#227)

* windows: add url scheme goldendict://

* linux: add url scheme goldendict:// handler

main.cc

@@ -183,6 +183,14 @@ logFile( false )
       }
       else
         word = arguments[ i ];
+#if defined(Q_OS_LINUX) || defined (Q_OS_WIN)
+        // handle url scheme like "goldendict://" on windows
+        word.remove("goldendict://");
+        // In microsoft Words, the / will be automatically appended
+        if(word.endsWith("/")){
+          word.chop(1);
+        }
+#endif
     }
   }
 }

mainwindow.cc

@@ -912,6 +912,21 @@ MainWindow::MainWindow( Config::Class & cfg_ ):
   inspector.reset( new ArticleInspector( this ));
 
   connect( QApplication::clipboard(), &QClipboard::changed, this, &MainWindow::clipboardChange );
+
+#ifdef Q_OS_WIN
+  // Regiser and update URL Scheme for windows
+  // https://learn.microsoft.com/en-us/previous-versions/windows/internet-explorer/ie-developer/platform-apis/aa767914(v=vs.85)
+
+  // Windows will automatically map registry key to Computer\HKEY_CLASSES_ROOT\ */
+  QSettings urlRegistry(R"(HKEY_CURRENT_USER\Software\Classes)", QSettings::NativeFormat);
+
+  urlRegistry.beginGroup("goldendict");
+  urlRegistry.setValue("Default", "URL: goldendict Protocol");
+  urlRegistry.setValue("URL Protocol", "");
+  urlRegistry.setValue("shell/open/command/Default",
+    QString("\"%1\"").arg( QDir::toNativeSeparators(QApplication::applicationFilePath())) + " \"%1\"");
+  urlRegistry.endGroup();
+#endif
 }
 
 void MainWindow::clipboardChange( QClipboard::Mode m)

redist/org.goldendict.GoldenDict.desktop

@@ -6,4 +6,5 @@ Name=GoldenDict
 GenericName=Multiformat Dictionary
 Comment=A feature-rich dictionary lookup program
 Icon=goldendict
-Exec=goldendict
+Exec=goldendict %u
+MimeType=x-scheme-handler/goldendict