[gtk/matthiasc/builder-requires: 6/7] buildertool: Supplant a requires

[Matthias Clasen <matthiasc src gnome org>]

commit 7215c7493380157aa4673cb0df2f38c82284c377
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Nov 10 19:19:40 2020 -0500

    buildertool: Supplant a requires
    
    When we convert a ui file to GTK 4 syntax, we *know*
    that it requires GTK 4, so put that in the output.

 gtk/tools/gtk-builder-tool-simplify.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)
---
diff --git a/gtk/tools/gtk-builder-tool-simplify.c b/gtk/tools/gtk-builder-tool-simplify.c
index 9e3324306d..868d0dc49a 100644
--- a/gtk/tools/gtk-builder-tool-simplify.c
+++ b/gtk/tools/gtk-builder-tool-simplify.c
@@ -62,6 +62,7 @@ typedef struct {
   char *output_filename;
   FILE *output;
   gboolean convert3to4;
+  gboolean has_gtk_requires;
 } MyParserData;
 
 static void
@@ -1640,7 +1641,10 @@ rewrite_requires (Element      *element,
                   MyParserData *data)
 {
   if (has_attribute (element, "lib", "gtk+"))
-    set_attribute_value (element, "lib", "gtk");
+    {
+      set_attribute_value (element, "lib", "gtk");
+      set_attribute_value (element, "version", "4.0");
+    }
 }
 
 static void
@@ -2050,6 +2054,12 @@ enhance_element (Element      *element,
 {
   GList *l;
 
+  if (strcmp (element->element_name, "requires") == 0 &&
+      has_attribute (element, "lib", "gtk+"))
+    {
+      data->has_gtk_requires = TRUE;
+    }
+
   add_old_default_properties (element, data);
 
   for (l = element->children; l; l = l->next)
@@ -2057,6 +2067,13 @@ enhance_element (Element      *element,
       Element *child = l->data;
       enhance_element (child, data);
     }
+
+  if (element == data->root && !data->has_gtk_requires)
+    {
+      Element *requires = add_element (element, "requires");
+      set_attribute_value (requires, "lib", "gtk+");
+      set_attribute_value (requires, "version", "3.0");
+    }
 }
 
 static void
@@ -2144,6 +2161,7 @@ simplify_file (const char *filename,
   data.input_filename = filename;
   data.output_filename = NULL;
   data.convert3to4 = convert3to4;
+  data.has_gtk_requires = FALSE;
 
   if (replace)
     {