[gimp] libgimpbase: add support for GParamParam in GPParamDef too

[Michael Natterer <mitch src gnome org>]

commit 7764f8b34bce41217f84e9f0973cc42fd97e6bae
Author: Michael Natterer <mitch gimp org>
Date:   Mon Aug 5 14:12:19 2019 +0200

    libgimpbase: add support for GParamParam in GPParamDef too
    
    to describe param specs that describe param specs, yay.

 libgimpbase/gimpprotocol.c | 18 ++++++++++++++++++
 libgimpbase/gimpprotocol.h | 26 +++++++++++++++++---------
 2 files changed, 35 insertions(+), 9 deletions(-)
---
diff --git a/libgimpbase/gimpprotocol.c b/libgimpbase/gimpprotocol.c
index 6aa5937be7..90c6842b4a 100644
--- a/libgimpbase/gimpprotocol.c
+++ b/libgimpbase/gimpprotocol.c
@@ -1136,6 +1136,13 @@ _gp_param_def_read (GIOChannel *channel,
                                    user_data))
         return FALSE;
       break;
+
+    case GP_PARAM_DEF_TYPE_PARAM_DEF:
+      if (! _gimp_wire_read_string (channel,
+                                    &param_def->meta.m_param_def.type_name, 1,
+                                    user_data))
+        return FALSE;
+      break;
     }
 
   return TRUE;
@@ -1171,6 +1178,10 @@ _gp_param_def_destroy (GPParamDef *param_def)
     case GP_PARAM_DEF_TYPE_COLOR:
     case GP_PARAM_DEF_TYPE_ID:
       break;
+
+    case GP_PARAM_DEF_TYPE_PARAM_DEF:
+      g_free (param_def->meta.m_param_def.type_name);
+      break;
     }
 }
 
@@ -1403,6 +1414,13 @@ _gp_param_def_write (GIOChannel *channel,
                                     user_data))
         return FALSE;
       break;
+
+    case GP_PARAM_DEF_TYPE_PARAM_DEF:
+      if (! _gimp_wire_write_string (channel,
+                                     &param_def->meta.m_param_def.type_name, 1,
+                                     user_data))
+        return FALSE;
+      break;
     }
 
   return TRUE;
diff --git a/libgimpbase/gimpprotocol.h b/libgimpbase/gimpprotocol.h
index a91f334830..5b7177babc 100644
--- a/libgimpbase/gimpprotocol.h
+++ b/libgimpbase/gimpprotocol.h
@@ -56,7 +56,8 @@ typedef enum
   GP_PARAM_DEF_TYPE_FLOAT,
   GP_PARAM_DEF_TYPE_STRING,
   GP_PARAM_DEF_TYPE_COLOR,
-  GP_PARAM_DEF_TYPE_ID
+  GP_PARAM_DEF_TYPE_ID,
+  GP_PARAM_DEF_TYPE_PARAM_DEF
 } GPParamDefType;
 
 typedef enum
@@ -85,6 +86,7 @@ typedef struct _GPParamDefFloat    GPParamDefFloat;
 typedef struct _GPParamDefString   GPParamDefString;
 typedef struct _GPParamDefColor    GPParamDefColor;
 typedef struct _GPParamDefID       GPParamDefID;
+typedef struct _GPParamDefParamDef GPParamDefParamDef;
 typedef struct _GPParam            GPParam;
 typedef struct _GPParamArray       GPParamArray;
 typedef struct _GPParamStringArray GPParamStringArray;
@@ -190,6 +192,11 @@ struct _GPParamDefID
   gint32 none_ok;
 };
 
+struct _GPParamDefParamDef
+{
+  gchar *type_name;
+};
+
 struct _GPParamDef
 {
   GPParamDefType  param_def_type;
@@ -200,14 +207,15 @@ struct _GPParamDef
 
   union
   {
-    GPParamDefInt     m_int;
-    GPParamDefUnit    m_unit;
-    GPParamDefEnum    m_enum;
-    GPParamDefBoolean m_boolean;
-    GPParamDefFloat   m_float;
-    GPParamDefString  m_string;
-    GPParamDefColor   m_color;
-    GPParamDefID      m_id;
+    GPParamDefInt      m_int;
+    GPParamDefUnit     m_unit;
+    GPParamDefEnum     m_enum;
+    GPParamDefBoolean  m_boolean;
+    GPParamDefFloat    m_float;
+    GPParamDefString   m_string;
+    GPParamDefColor    m_color;
+    GPParamDefID       m_id;
+    GPParamDefParamDef m_param_def;
   } meta;
 };