From 55594a4d33d8a1f265fe255afab18abeafba75ec Mon Sep 17 00:00:00 2001
From: David Capello <david@igarastudio.com>
Date: Tue, 27 Aug 2019 19:56:33 -0300
Subject: [PATCH] [lua] Add support to index layers by name

---
 src/app/script/layers_class.cpp | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/app/script/layers_class.cpp b/src/app/script/layers_class.cpp
index 19592f293..68d8694ee 100644
--- a/src/app/script/layers_class.cpp
+++ b/src/app/script/layers_class.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018  Igara Studio S.A.
+// Copyright (C) 2018-2019  Igara Studio S.A.
 // Copyright (C) 2018  David Capello
 //
 // This program is distributed under the terms of
@@ -12,6 +12,7 @@
 #include "app/script/docobj.h"
 #include "app/script/engine.h"
 #include "app/script/luacpp.h"
+#include "base/string.h"
 #include "doc/layer.h"
 #include "doc/object_ids.h"
 #include "doc/sprite.h"
@@ -54,6 +55,21 @@ int Layers_len(lua_State* L)
 int Layers_index(lua_State* L)
 {
   auto obj = get_obj<LayersObj>(L, 1);
+
+  // Index by layer name
+  if (lua_isstring(L, 2)) {
+    if (const char* name = lua_tostring(L, 2)) {
+      for (ObjectId layerId : obj->layers) {
+        Layer* layer = doc::get<Layer>(layerId);
+        if (layer &&
+            base::utf8_icmp(layer->name(), name) == 0) {
+          push_docobj<Layer>(L, layerId);
+          return 1;
+        }
+      }
+    }
+  }
+
   const int i = lua_tonumber(L, 2);
   if (i >= 1 && i <= int(obj->layers.size()))
     push_docobj<Layer>(L, obj->layers[i-1]);