ui: HtmlModalSP (#1570)

* ui: `HtmlModalSP`

* less

system/ui/sunnypilot/widgets/html_render.py

@@ -0,0 +1,27 @@
+"""
+Copyright (c) 2021-, Haibin Wen, sunnypilot, and a number of other contributors.
+
+This file is part of sunnypilot and is licensed under the MIT License.
+See the LICENSE.md file in the root directory for more details.
+"""
+from openpilot.system.ui.lib.application import gui_app
+from openpilot.system.ui.widgets import DialogResult
+from openpilot.system.ui.widgets.html_render import HtmlModal
+
+
+class HtmlModalSP(HtmlModal):
+  def __init__(self, file_path=None, text=None, callback=None):
+    super().__init__(file_path=file_path, text=text)
+    self._callback = callback
+    self._dialog_result = DialogResult.NO_ACTION
+    self._ok_button._click_callback = self._on_ok_clicked
+
+  def _on_ok_clicked(self):
+    self._dialog_result = DialogResult.CONFIRM
+    gui_app.set_modal_overlay(None)
+
+    if self._callback:
+      self._callback(self._dialog_result)
+
+  def reset(self):
+    self._dialog_result = DialogResult.NO_ACTION