[feat] Implement mockup of ShortScience integration

This commit adds a simple integration of ShortScience.org
in the form of an additional context menu action when an
entry is selected. This action opens the user's web browser
to the search page of ShortScience with the title of the
paper entered. Essentially, this is our MVP for the
integration towards ShortScience bar some testing.

[Issue: #3]

src/main/java/org/jabref/gui/BasePanel.java

@@ -2,6 +2,9 @@
 
 import java.io.IOException;
 import java.io.StringReader;
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -329,6 +332,8 @@ private void setupActions() {
 
         actions.put(Actions.OPEN_URL, new OpenURLAction());
 
+        actions.put(Actions.OPEN_SHORTSCIENCE, new OpenShortScienceAction());
+
         actions.put(Actions.MERGE_WITH_FETCHED_ENTRY, new MergeWithFetchedEntryAction(this, frame.getDialogService()));
 
         actions.put(Actions.REPLACE_ALL, () -> (new ReplaceStringAction(this)).execute());
@@ -1200,6 +1205,37 @@ public void action() {
         }
     }
 
+    private class OpenShortScienceAction implements BaseAction {
+
+        @Override
+        public void action() {
+            final List<BibEntry> bes = mainTable.getSelectedEntries();
+            if (bes.size() == 1) {
+                Optional<String> title = bes.get(0).getField(StandardField.TITLE);
+                if (title.isPresent()) {
+                    String link;
+                    try {
+                        link = String.format("https://www.shortscience.org/internalsearch?q=%s", URLEncoder.encode(title.get(), StandardCharsets.UTF_8.name()));
+                    } catch (UnsupportedEncodingException ex) {
+                        output(Localization.lang("Error") + ": " + ex.getMessage());
+                        return;
+                    }
+                    try {
+                        JabRefDesktop.openExternalViewer(bibDatabaseContext, link, StandardField.URL);
+                        output(Localization.lang("External viewer called") + '.');
+                    } catch (IOException ex) {
+                        output(Localization.lang("Error") + ": " + ex.getMessage());
+                    }
+                } else {
+                    //No title entered, we shouldn't be able to get here
+                    throw new AssertionError("OpenShortScienceAction called without title.");
+                }
+            } else {
+                output(Localization.lang("This operation requires exactly one item to be selected."));
+            }
+        }
+    }
+
     private class OpenURLAction implements BaseAction {
 
         @Override

src/main/java/org/jabref/gui/actions/Actions.java

@@ -38,6 +38,7 @@ public enum Actions {
     OPEN_EXTERNAL_FILE,
     OPEN_FOLDER,
     OPEN_URL,
+    OPEN_SHORTSCIENCE,
     PASTE,
     PREVIOUS_PREVIEW_STYLE,
     PULL_CHANGES_FROM_SHARED_DATABASE,

src/main/java/org/jabref/gui/actions/StandardActions.java

@@ -33,6 +33,7 @@ public enum StandardActions implements Action {
     SEND_AS_EMAIL(Localization.lang("Send as email"), IconTheme.JabRefIcons.EMAIL),
     OPEN_EXTERNAL_FILE(Localization.lang("Open file"), IconTheme.JabRefIcons.FILE, KeyBinding.OPEN_FILE),
     OPEN_URL(Localization.lang("Open URL or DOI"), IconTheme.JabRefIcons.WWW, KeyBinding.OPEN_URL_OR_DOI),
+    OPEN_SHORTSCIENCE(Localization.lang("Open ShortScience"), IconTheme.JabRefIcons.WWW),
     MERGE_WITH_FETCHED_ENTRY(Localization.lang("Get BibTeX data from %0", "DOI/ISBN/...")),
     ATTACH_FILE(Localization.lang("Attach file"), IconTheme.JabRefIcons.ATTACH_FILE),
     PRIORITY(Localization.lang("Priority"), IconTheme.JabRefIcons.PRIORITY),

src/main/java/org/jabref/gui/maintable/RightClickMenu.java

@@ -61,6 +61,7 @@ public static ContextMenu create(BibEntryTableViewModel entry, KeyBindingReposit
         contextMenu.getItems().add(factory.createMenuItem(StandardActions.OPEN_FOLDER, getOpenFolderCommand(panel)));
         contextMenu.getItems().add(factory.createMenuItem(StandardActions.OPEN_EXTERNAL_FILE, getOpenExternalFileCommand(panel)));
         contextMenu.getItems().add(factory.createMenuItem(StandardActions.OPEN_URL, getOpenUrlCommand(panel)));
+        contextMenu.getItems().add(factory.createMenuItem(StandardActions.OPEN_SHORTSCIENCE, getOpenShortScienceCommand(panel)));
 
         contextMenu.getItems().add(new SeparatorMenuItem());
 
@@ -90,6 +91,12 @@ private static OldCommandWrapper getOpenUrlCommand(BasePanel panel) {
         return command;
     }
 
+    private static OldCommandWrapper getOpenShortScienceCommand(BasePanel panel) {
+        OldCommandWrapper command = new OldCommandWrapper(Actions.OPEN_SHORTSCIENCE, panel);
+        command.setExecutable(isFieldSetForSelectedEntry(StandardField.TITLE, panel));
+        return command;
+    }
+
     private static OldCommandWrapper getOpenExternalFileCommand(BasePanel panel) {
         OldCommandWrapper command = new OldCommandWrapper(Actions.OPEN_EXTERNAL_FILE, panel);
         command.setExecutable(isFieldSetForSelectedEntry(StandardField.FILE, panel));