Added classes to support formatting

src/myfasthtml/controls/DataGridsManager.py

@@ -13,6 +13,7 @@ from myfasthtml.controls.TreeView import TreeView, TreeNode
 from myfasthtml.controls.helpers import mk
 from myfasthtml.core.commands import Command
 from myfasthtml.core.dbmanager import DbObject
+from myfasthtml.core.formatting.presets import DEFAULT_STYLE_PRESETS, DEFAULT_FORMATTER_PRESETS
 from myfasthtml.core.instances import MultipleInstance, InstancesManager
 from myfasthtml.icons.fluent_p1 import table_add20_regular
 from myfasthtml.icons.fluent_p3 import folder_open20_regular
@@ -71,6 +72,7 @@ class Commands(BaseCommands):
 
 
 class DataGridsManager(MultipleInstance):
+  
   def __init__(self, parent, _id=None):
     if not getattr(self, "_is_new_instance", False):
       # Skip __init__ if instance already existed
@@ -81,6 +83,10 @@ class DataGridsManager(MultipleInstance):
     self._tree = self._mk_tree()
     self._tree.bind_command("SelectNode", self.commands.show_document())
     self._tabs_manager = InstancesManager.get_by_type(self._session, TabsManager)
+    
+    # Global presets shared across all DataGrids
+    self.style_presets: dict = DEFAULT_STYLE_PRESETS.copy()
+    self.formatter_presets: dict = DEFAULT_FORMATTER_PRESETS.copy()
   
   def upload_from_source(self):
     file_upload = FileUpload(self)
@@ -143,6 +149,46 @@ class DataGridsManager(MultipleInstance):
     self._tree.clear()
     return self._tree
   
+  # === Presets Management ===
+  
+  def get_style_presets(self) -> dict:
+    """Get the global style presets."""
+    return self.style_presets
+  
+  def get_formatter_presets(self) -> dict:
+    """Get the global formatter presets."""
+    return self.formatter_presets
+  
+  def add_style_preset(self, name: str, preset: dict):
+    """
+    Add or update a style preset.
+
+    Args:
+        name: Preset name (e.g., "custom_highlight")
+        preset: Dict with CSS properties (e.g., {"background-color": "yellow", "color": "black"})
+    """
+    self.style_presets[name] = preset
+  
+  def add_formatter_preset(self, name: str, preset: dict):
+    """
+    Add or update a formatter preset.
+
+    Args:
+        name: Preset name (e.g., "custom_currency")
+        preset: Dict with formatter config (e.g., {"type": "number", "prefix": "CHF ", "precision": 2})
+    """
+    self.formatter_presets[name] = preset
+  
+  def remove_style_preset(self, name: str):
+    """Remove a style preset."""
+    if name in self.style_presets:
+      del self.style_presets[name]
+  
+  def remove_formatter_preset(self, name: str):
+    """Remove a formatter preset."""
+    if name in self.formatter_presets:
+      del self.formatter_presets[name]
+  
   def mk_main_icons(self):
     return Div(
       mk.icon(folder_open20_regular, tooltip="Upload from source", command=self.commands.upload_from_source()),