From c6b827a1780f378067bf5337bd297b96cae9b982 Mon Sep 17 00:00:00 2001
From: li3317 <li3317@purdue.edu>
Date: Sat, 26 Dec 2020 13:19:59 -0500
Subject: [PATCH] add indent button on press

---
 lib/models/documents/attribute.dart | 19 +++++++++++++++++++
 lib/widgets/toolbar.dart            | 19 ++++++++++++++++++-
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/lib/models/documents/attribute.dart b/lib/models/documents/attribute.dart
index 8d1490c6..bf33424c 100644
--- a/lib/models/documents/attribute.dart
+++ b/lib/models/documents/attribute.dart
@@ -116,6 +116,25 @@ class Attribute<T> {
   // "attributes":{"list":"ordered"}
   static Attribute<String> get ol => ListAttribute('ordered');
 
+  // "attributes":{"indent":1"}
+  static Attribute<int> get indentL1 => IndentAttribute(level: 1);
+
+  // "attributes":{"indent":2"}
+  static Attribute<int> get indentL2 => IndentAttribute(level: 2);
+
+  // "attributes":{"indent":3"}
+  static Attribute<int> get indentL3 => IndentAttribute(level: 3);
+
+  static Attribute<int> getIndentLevel(int level) {
+    if (level == 1) {
+      return indentL1;
+    }
+    if (level == 2) {
+      return indentL2;
+    }
+    return indentL3;
+  }
+
   bool get isInline => scope == AttributeScope.INLINE;
 
   bool get isBlockExceptHeader => blockKeysExceptHeader.contains(key);
diff --git a/lib/widgets/toolbar.dart b/lib/widgets/toolbar.dart
index 94717217..7f4ccc18 100644
--- a/lib/widgets/toolbar.dart
+++ b/lib/widgets/toolbar.dart
@@ -638,7 +638,24 @@ class _IndentButtonState extends State<IndentButton> {
       size: 32,
       icon: Icon(widget.icon, size: 18, color: iconColor),
       fillColor: fillColor,
-//      onPressed: ,
+      onPressed: () {
+        final indent = widget.controller.getSelectionStyle().attributes[Attribute.indent.key];
+        if (indent == null) {
+          if (widget.isIncrease) {
+            widget.controller.formatSelection(Attribute.indentL1);
+          }
+          return;
+        }
+        if (indent.value == 1 && !widget.isIncrease) {
+          widget.controller.formatSelection(Attribute.clone(Attribute.indentL1, null));
+          return;
+        }
+        if (widget.isIncrease) {
+          widget.controller.formatSelection(Attribute.getIndentLevel(indent.value + 1));
+          return;
+        }
+        widget.controller.formatSelection(Attribute.getIndentLevel(indent.value - 1));
+      },
     );
   }
 }