show the first file content of gist

Author: chuntungho

.gitignore

@@ -0,0 +1,3 @@
+.gradle/
+.idea/
+build/

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 #Fri Jan 03 09:29:20 CST 2020
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-bin.zip
+distributionUrl=https\://downloads.gradle-dn.com/distributions/gradle-6.8.3-bin.zip
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists

src/main/java/com/chuntung/plugin/gistsnippet/view/InsertGistDialog.java

@@ -319,12 +319,16 @@ private void initYoursPane(List<GithubAccount> accountList) {
     }
 
     private void onSelect(TreeSelectionEvent e) {
-        DefaultMutableTreeNode selected = null;
         TreePath treePath = e.getNewLeadSelectionPath();
-        if (treePath != null) {
-            selected = (DefaultMutableTreeNode) treePath.getLastPathComponent();
+        if (treePath == null || treePath.getLastPathComponent() == null) {
+            return;
         }
-        if (selected != null && selected.isLeaf() && selected.getUserObject() instanceof GistFileDTO) {
+        DefaultMutableTreeNode selected = (DefaultMutableTreeNode) treePath.getLastPathComponent();
+        // show the first file when gist item is selected
+        if (selected.getUserObject() instanceof SnippetNodeDTO && selected.getChildCount() > 0) {
+            selected = (DefaultMutableTreeNode) selected.getFirstChild();
+        }
+        if (selected.getUserObject() instanceof GistFileDTO) {
             // show file content
             GistFileDTO gistFileDTO = getUserObject(selected);
             showingFileUrl = gistFileDTO.getRawUrl();