Refactor extract parts of entitytree module that need to be usable without wx

Author: davidfstr

src/crystal/browser/entitytree.py

@@ -1,6 +1,11 @@
 from __future__ import annotations
 
 from concurrent.futures import CancelledError, Future
+from crystal.browser.entitytree_info import (
+    _GroupedNodeInfo,
+    ResourceGroupNodeInfo,
+    RootResourceNodeInfo,
+)
 from crystal.browser.icons import (
     BADGED_ART_PROVIDER_TREE_NODE_ICON, BADGED_TREE_NODE_ICON, TREE_NODE_ICONS,
 )
@@ -1203,18 +1208,7 @@ def calculate_title(self) -> str:
 
     @staticmethod
     def calculate_title_of(root_resource: RootResource) -> str:
-        project = root_resource.project
-        display_url = project.get_display_url(root_resource.url)
-        if root_resource.name != '':
-            entity_title_format = project.entity_title_format  # cache
-            if entity_title_format == 'name_url':
-                return f'{root_resource.name} - {display_url}'
-            elif entity_title_format == 'url_name':
-                return f'{display_url} - {root_resource.name}'
-            else:
-                assert_never(entity_title_format)
-        else:
-            return f'{display_url}'
+        return RootResourceNodeInfo.calculate_title_of(root_resource)
 
     @override
     @property
@@ -1376,8 +1370,8 @@ def __hash__(self):
 class _GroupedNode(Node):  # abstract
     entity_tooltip: str  # abstract
 
-    ICON = '📁'
-    ICON_TRUNCATION_FIX = ' '
+    ICON = _GroupedNodeInfo.ICON
+    ICON_TRUNCATION_FIX = _GroupedNodeInfo.ICON_TRUNCATION_FIX
 
     def __init__(self,
             resource_group: ResourceGroup,
@@ -1460,18 +1454,7 @@ def calculate_title(self) -> str:
 
     @staticmethod
     def calculate_title_of(resource_group: ResourceGroup) -> str:
-        project = resource_group.project
-        display_url = project.get_display_url(resource_group.url_pattern)
-        if resource_group.name != '':
-            entity_title_format = project.entity_title_format  # cache
-            if entity_title_format == 'name_url':
-                return f'{resource_group.name} - {display_url}'
-            elif entity_title_format == 'url_name':
-                return f'{display_url} - {resource_group.name}'
-            else:
-                assert_never(entity_title_format)
-        else:
-            return f'{display_url}'
+        return ResourceGroupNodeInfo.calculate_title_of(resource_group)
 
     @override
     @property

src/crystal/browser/entitytree_info.py

@@ -0,0 +1,55 @@
+"""
+Data and algorithms extracted from the "entitytree" module that must be
+usable even if wx is not available.
+"""
+
+from typing import assert_never, TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from crystal.model.resource_group import ResourceGroup, RootResource
+
+
+class RootResourceNodeInfo:
+    ICON = '⚓️'
+    ICON_TRUNCATION_FIX = ''
+    
+    # === Properties ===
+    
+    @staticmethod
+    def calculate_title_of(root_resource: 'RootResource') -> str:
+        project = root_resource.project
+        display_url = project.get_display_url(root_resource.url)
+        if root_resource.name != '':
+            entity_title_format = project.entity_title_format  # cache
+            if entity_title_format == 'name_url':
+                return f'{root_resource.name} - {display_url}'
+            elif entity_title_format == 'url_name':
+                return f'{display_url} - {root_resource.name}'
+            else:
+                assert_never(entity_title_format)
+        else:
+            return f'{display_url}'
+
+
+class _GroupedNodeInfo:
+    ICON = '📁'
+    ICON_TRUNCATION_FIX = ' '
+
+
+class ResourceGroupNodeInfo(_GroupedNodeInfo):
+    # === Properties ===
+    
+    @staticmethod
+    def calculate_title_of(resource_group: 'ResourceGroup') -> str:
+        project = resource_group.project
+        display_url = project.get_display_url(resource_group.url_pattern)
+        if resource_group.name != '':
+            entity_title_format = project.entity_title_format  # cache
+            if entity_title_format == 'name_url':
+                return f'{resource_group.name} - {display_url}'
+            elif entity_title_format == 'url_name':
+                return f'{display_url} - {resource_group.name}'
+            else:
+                assert_never(entity_title_format)
+        else:
+            return f'{display_url}'