Indicate project folders with special icon in File Browser

Using the dev-fund heart icon temporarily :)

source/blender/blenkernel/BKE_blender_project.h

@@ -29,7 +29,12 @@ BlenderProject *BKE_project_active_get(void) ATTR_WARN_UNUSED_RESULT;
  */
 void BKE_project_active_unset(void);
 /**
- * Check if \a path points into the project root path (i.e. if one of the ancestors of the
+ * Check if \a path references a project root directory. Will return false for paths pointing into
+ * the project root directory.
+ */
+bool BKE_project_is_path_project_root(const char *path) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
+/**
+ * Check if \a path points to or into a project root path (i.e. if one of the ancestors of the
  * referenced file/directory is a project root directory).
  */
 bool BKE_project_contains_path(const char *path) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();

source/blender/blenkernel/intern/blender_project.cc

@@ -318,6 +318,11 @@ void BKE_project_active_unset(void)
   bke::BlenderProject::set_active_from_settings(nullptr);
 }
 
+bool BKE_project_is_path_project_root(const char *path)
+{
+  return bke::path_contains_project_settings(path);
+}
+
 bool BKE_project_contains_path(const char *path)
 {
   const StringRef found_root_path = bke::BlenderProject::project_root_path_find_from_path(path);

source/blender/editors/space_file/filelist.cc

@@ -42,6 +42,7 @@
 
 #include "BKE_asset.h"
 #include "BKE_asset_library.h"
+#include "BKE_blender_project.h"
 #include "BKE_context.h"
 #include "BKE_global.h"
 #include "BKE_icons.h"
@@ -1171,6 +1172,10 @@ static int filelist_geticon_ex(const FileDirEntry *file,
 {
   const eFileSel_File_Types typeflag = (eFileSel_File_Types)file->typeflag;
 
+  if ((typeflag & FILE_TYPE_DIR) && (typeflag & FILE_TYPE_BLENDER_PROJECT)) {
+    return ICON_FUND;
+  }
+
   if ((typeflag & FILE_TYPE_DIR) &&
       !(ignore_libdir && (typeflag & (FILE_TYPE_BLENDERLIB | FILE_TYPE_BLENDER)))) {
     if (FILENAME_IS_PARENT(file->relpath)) {
@@ -2941,6 +2946,12 @@ static int filelist_readjob_list_dir(const char *root,
         }
       }
 
+      if ((entry->typeflag & FILE_TYPE_DIR) && !(entry->typeflag & FILE_TYPE_BLENDER)) {
+        if (BKE_project_is_path_project_root(target)) {
+          entry->typeflag |= FILE_TYPE_BLENDER_PROJECT;
+        }
+      }
+
 #ifndef WIN32
       /* Set linux-style dot files hidden too. */
       if (is_hidden_dot_filename(entry->relpath, entry)) {

source/blender/makesdna/DNA_space_types.h

@@ -1083,6 +1083,8 @@ typedef enum eFileSel_File_Types {
   FILE_TYPE_VOLUME = (1 << 19),
 
   FILE_TYPE_ASSET = (1 << 28),
+  /** Directory is a Blender project root directory. */
+  FILE_TYPE_BLENDER_PROJECT = (1 << 29),
   /** An FS directory (i.e. S_ISDIR on its path is true). */
   FILE_TYPE_DIR = (1 << 30),
   FILE_TYPE_BLENDERLIB = (1u << 31),