Added lazy loading when showing grid to improve performance

src/core/fasthtml_helper.py

@@ -0,0 +1,76 @@
+from fastcore.basics import NotStr
+
+from core.utils import merge_classes
+
+attr_map = {
+    "cls": "class",
+    "_id": "id",
+}
+
+
+def safe_attr(attr_name):
+  attr_name = attr_name.replace("hx_", "hx-")
+  attr_name = attr_name.replace("data_", "data-")
+  return attr_map.get(attr_name, attr_name)
+
+
+def to_html(item):
+  if item is None:
+    return ""
+  elif isinstance(item, str):
+    return item
+  elif isinstance(item, (int, float, bool)):
+    return str(item)
+  elif isinstance(item, MyFt):
+    return item.to_html()
+  elif isinstance(item, NotStr):
+    return str(item)
+  else:
+    raise Exception(f"Unsupported type: {type(item)}, {item=}")
+
+
+class MyFt:
+  def __init__(self, tag, *args, **kwargs):
+    self.tag = tag
+    self.children = args
+    self.attrs = {safe_attr(k): v for k, v in kwargs.items()}
+  
+  def to_html(self):
+    body_items = [to_html(item) for item in self.children]
+    return f"<{self.tag} {' '.join(f'{k}="{v}"' for k, v in self.attrs.items())}>{' '.join(body_items)}</div>"
+  
+  def __ft__(self):
+    return NotStr(self.to_html())
+
+
+class MyDiv(MyFt):
+  def __init__(self, *args, **kwargs):
+    super().__init__("div", *args, **kwargs)
+
+
+class MySpan(MyFt):
+  def __init__(self, *args, **kwargs):
+    super().__init__("span", *args, **kwargs)
+
+
+def mk_my_ellipsis(txt: str, cls='', **kwargs):
+  merged_cls = merge_classes("truncate",
+                             cls,
+                             kwargs)
+  return MyDiv(txt, cls=merged_cls, data_tooltip=txt, **kwargs)
+
+
+def mk_my_icon(icon, size=20, can_select=True, can_hover=False, cls='', tooltip=None, **kwargs):
+  merged_cls = merge_classes(f"icon-{size}",
+                             'icon-btn' if can_select else '',
+                             'mmt-btn' if can_hover else '',
+                             cls,
+                             kwargs)
+  return mk_my_tooltip(icon, tooltip, cls=merged_cls, **kwargs) if tooltip else MyDiv(icon, cls=merged_cls, **kwargs)
+
+
+def mk_my_tooltip(element, tooltip: str, cls='', **kwargs):
+  merged_cls = merge_classes("mmt-tooltip",
+                             cls,
+                             kwargs)
+  return MyDiv(element, cls=merged_cls, data_tooltip=tooltip, **kwargs)