refactor: handle structural tabbing for the breaking change symbol

Author: lppedd

src/main/kotlin/com/github/lppedd/cc/editor/CommitTabAction.kt

@@ -56,7 +56,8 @@ internal class CommitTabAction : TabAction() {
         val elementAtCaret = psiFile?.findElementAt(editor.getCaretOffset())
 
         if (elementAtCaret is ConventionalCommitScopeOpenParenPsiElement ||
-            elementAtCaret is ConventionalCommitScopeCloseParenPsiElement) {
+            elementAtCaret is ConventionalCommitScopeCloseParenPsiElement ||
+            elementAtCaret is ConventionalCommitBreakingChangePsiElement) {
           editor.putUserData(moveCaretKey, 1)
           return true
         } else if (elementAtCaret is ConventionalCommitSeparatorPsiElement) {

src/main/kotlin/com/github/lppedd/cc/language/parser/ConventionalCommitASTFactory.kt

@@ -1,6 +1,7 @@
 package com.github.lppedd.cc.language.parser
 
 import com.github.lppedd.cc.language.lexer.ConventionalCommitTokenType.Companion.BODY
+import com.github.lppedd.cc.language.lexer.ConventionalCommitTokenType.Companion.BREAKING_CHANGE
 import com.github.lppedd.cc.language.lexer.ConventionalCommitTokenType.Companion.FOOTER_TYPE
 import com.github.lppedd.cc.language.lexer.ConventionalCommitTokenType.Companion.FOOTER_TYPE_BREAKING_CHANGE
 import com.github.lppedd.cc.language.lexer.ConventionalCommitTokenType.Companion.FOOTER_VALUE
@@ -27,6 +28,7 @@ internal class ConventionalCommitASTFactory : ASTFactory() {
     tokensMap[SCOPE_OPEN_PAREN] = ::ConventionalCommitScopeOpenParenPsiElement
     tokensMap[SCOPE] = ::ConventionalCommitScopeValuePsiElement
     tokensMap[SCOPE_CLOSE_PAREN] = ::ConventionalCommitScopeCloseParenPsiElement
+    tokensMap[BREAKING_CHANGE] = ::ConventionalCommitBreakingChangePsiElement
     tokensMap[SEPARATOR] = ::ConventionalCommitSeparatorPsiElement
     tokensMap[SUBJECT] = ::ConventionalCommitSubjectPsiElement
     tokensMap[BODY] = ::ConventionalCommitBodyPsiElement

src/main/kotlin/com/github/lppedd/cc/language/psi/ConventionalCommitBreakingChangePsiElement.kt

@@ -0,0 +1,15 @@
+package com.github.lppedd.cc.language.psi
+
+import com.intellij.psi.impl.source.tree.LeafPsiElement
+import com.intellij.psi.tree.IElementType
+
+/**
+ * @author Edoardo Luppi
+ */
+class ConventionalCommitBreakingChangePsiElement(
+    type: IElementType,
+    text: CharSequence,
+) : LeafPsiElement(type, text) {
+  override fun toString(): String =
+    "ConventionalCommitBreakingChangePsiElement"
+}