rename ui to clan-app and move clan-app one layer up
This commit is contained in:
Jörg Thalheim
0
pkgs/clan-app/clan_app/deps/webview/__init__.py
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0
pkgs/clan-app/clan_app/deps/webview/__init__.py
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118
pkgs/clan-app/clan_app/deps/webview/_webview_ffi.py
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118
pkgs/clan-app/clan_app/deps/webview/_webview_ffi.py
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import ctypes
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import ctypes.util
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import os
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import platform
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from ctypes import CFUNCTYPE, c_char_p, c_int, c_void_p
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from pathlib import Path
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def _encode_c_string(s: str) -> bytes:
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return s.encode("utf-8")
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def _get_webview_version() -> str:
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"""Get webview version from environment variable or use default"""
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return os.getenv("WEBVIEW_VERSION", "0.8.1")
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def _get_lib_names() -> list[str]:
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"""Get platform-specific library names."""
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system = platform.system().lower()
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machine = platform.machine().lower()
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if system == "windows":
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if machine == "amd64" or machine == "x86_64":
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return ["webview.dll", "WebView2Loader.dll"]
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if machine == "arm64":
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msg = "arm64 is not supported on Windows"
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raise RuntimeError(msg)
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msg = f"Unsupported architecture: {machine}"
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raise RuntimeError(msg)
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if system == "darwin":
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if machine == "arm64":
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return ["libwebview.dylib"]
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msg = "Not supported"
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raise RuntimeError(msg)
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# linux
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return ["libwebview.so"]
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def _be_sure_libraries() -> list[Path] | None:
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"""Ensure libraries exist and return paths."""
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lib_dir = os.environ.get("WEBVIEW_LIB_DIR")
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if not lib_dir:
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msg = "WEBVIEW_LIB_DIR environment variable is not set"
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raise RuntimeError(msg)
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lib_dir_p = Path(lib_dir)
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lib_names = _get_lib_names()
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lib_paths = [lib_dir_p / lib_name for lib_name in lib_names]
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# Check if any library is missing
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missing_libs = [path for path in lib_paths if not path.exists()]
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if not missing_libs:
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return lib_paths
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return None
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class _WebviewLibrary:
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def __init__(self) -> None:
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lib_names = _get_lib_names()
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library_path = ctypes.util.find_library(lib_names[0])
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if not library_path:
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library_paths = _be_sure_libraries()
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if not library_paths:
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msg = f"Failed to find required library: {lib_names}"
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raise RuntimeError(msg)
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try:
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self.lib = ctypes.cdll.LoadLibrary(str(library_paths[0]))
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except Exception as e:
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print(f"Failed to load webview library: {e}")
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raise
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# Define FFI functions
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self.webview_create = self.lib.webview_create
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self.webview_create.argtypes = [c_int, c_void_p]
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self.webview_create.restype = c_void_p
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self.webview_destroy = self.lib.webview_destroy
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self.webview_destroy.argtypes = [c_void_p]
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self.webview_run = self.lib.webview_run
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self.webview_run.argtypes = [c_void_p]
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self.webview_terminate = self.lib.webview_terminate
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self.webview_terminate.argtypes = [c_void_p]
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self.webview_set_title = self.lib.webview_set_title
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self.webview_set_title.argtypes = [c_void_p, c_char_p]
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self.webview_set_icon = self.lib.webview_set_icon
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self.webview_set_icon.argtypes = [c_void_p, c_char_p]
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self.webview_set_size = self.lib.webview_set_size
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self.webview_set_size.argtypes = [c_void_p, c_int, c_int, c_int]
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self.webview_navigate = self.lib.webview_navigate
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self.webview_navigate.argtypes = [c_void_p, c_char_p]
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self.webview_init = self.lib.webview_init
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self.webview_init.argtypes = [c_void_p, c_char_p]
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self.webview_eval = self.lib.webview_eval
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self.webview_eval.argtypes = [c_void_p, c_char_p]
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self.webview_bind = self.lib.webview_bind
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self.webview_bind.argtypes = [c_void_p, c_char_p, c_void_p, c_void_p]
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self.webview_unbind = self.lib.webview_unbind
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self.webview_unbind.argtypes = [c_void_p, c_char_p]
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self.webview_return = self.lib.webview_return
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self.webview_return.argtypes = [c_void_p, c_char_p, c_int, c_char_p]
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self.CFUNCTYPE = CFUNCTYPE
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_webview_lib = _WebviewLibrary()
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237
pkgs/clan-app/clan_app/deps/webview/webview.py
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237
pkgs/clan-app/clan_app/deps/webview/webview.py
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@@ -0,0 +1,237 @@
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import ctypes
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import functools
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import json
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import logging
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import threading
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from collections.abc import Callable
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from dataclasses import dataclass
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from enum import IntEnum
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from typing import Any
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from clan_cli.async_run import set_should_cancel
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from clan_lib.api import (
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ApiError,
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ErrorDataClass,
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MethodRegistry,
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dataclass_to_dict,
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from_dict,
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)
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from ._webview_ffi import _encode_c_string, _webview_lib
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log = logging.getLogger(__name__)
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class SizeHint(IntEnum):
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NONE = 0
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MIN = 1
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MAX = 2
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FIXED = 3
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class FuncStatus(IntEnum):
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SUCCESS = 0
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FAILURE = 1
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class Size:
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def __init__(self, width: int, height: int, hint: SizeHint) -> None:
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self.width = width
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self.height = height
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self.hint = hint
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@dataclass
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class WebThread:
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thread: threading.Thread
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stop_event: threading.Event
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class Webview:
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def __init__(
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self, debug: bool = False, size: Size | None = None, window: int | None = None
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) -> None:
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self._handle = _webview_lib.webview_create(int(debug), window)
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self._callbacks: dict[str, Callable[..., Any]] = {}
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self.threads: dict[str, WebThread] = {}
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if size:
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self.size = size
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def api_wrapper(
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self,
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api: MethodRegistry,
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method_name: str,
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wrap_method: Callable[..., Any],
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op_key_bytes: bytes,
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request_data: bytes,
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arg: int,
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) -> None:
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op_key = op_key_bytes.decode()
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args = json.loads(request_data.decode())
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log.debug(f"Calling {method_name}({args[0]})")
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# Initialize dataclasses from the payload
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reconciled_arguments = {}
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for k, v in args[0].items():
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# Some functions expect to be called with dataclass instances
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# But the js api returns dictionaries.
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# Introspect the function and create the expected dataclass from dict dynamically
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# Depending on the introspected argument_type
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arg_class = api.get_method_argtype(method_name, k)
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# TODO: rename from_dict into something like construct_checked_value
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# from_dict really takes Anything and returns an instance of the type/class
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reconciled_arguments[k] = from_dict(arg_class, v)
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reconciled_arguments["op_key"] = op_key
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# TODO: We could remove the wrapper in the MethodRegistry
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# and just call the method directly
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def thread_task(stop_event: threading.Event) -> None:
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try:
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set_should_cancel(lambda: stop_event.is_set())
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result = wrap_method(**reconciled_arguments)
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serialized = json.dumps(
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dataclass_to_dict(result), indent=4, ensure_ascii=False
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)
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log.debug(f"Result for {method_name}: {serialized}")
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self.return_(op_key, FuncStatus.SUCCESS, serialized)
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except Exception as e:
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log.exception(f"Error while handling result of {method_name}")
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result = ErrorDataClass(
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op_key=op_key,
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status="error",
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errors=[
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ApiError(
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message="An internal error occured",
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description=str(e),
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location=["bind_jsonschema_api", method_name],
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)
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],
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)
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serialized = json.dumps(
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dataclass_to_dict(result), indent=4, ensure_ascii=False
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)
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self.return_(op_key, FuncStatus.FAILURE, serialized)
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finally:
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del self.threads[op_key]
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stop_event = threading.Event()
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thread = threading.Thread(
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target=thread_task, args=(stop_event,), name="WebviewThread"
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)
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thread.start()
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self.threads[op_key] = WebThread(thread=thread, stop_event=stop_event)
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def __enter__(self) -> "Webview":
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return self
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@property
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def size(self) -> Size:
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return self._size
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@size.setter
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def size(self, value: Size) -> None:
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_webview_lib.webview_set_size(
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self._handle, value.width, value.height, value.hint
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)
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self._size = value
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@property
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def title(self) -> str:
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return self._title
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@title.setter
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def title(self, value: str) -> None:
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_webview_lib.webview_set_title(self._handle, _encode_c_string(value))
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self._title = value
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@property
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def icon(self) -> str:
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return self._icon
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@icon.setter
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def icon(self, value: str) -> None:
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_webview_lib.webview_set_icon(self._handle, _encode_c_string(value))
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self._icon = value
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def destroy(self) -> None:
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for name in list(self._callbacks.keys()):
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self.unbind(name)
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_webview_lib.webview_terminate(self._handle)
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_webview_lib.webview_destroy(self._handle)
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self._handle = None
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def navigate(self, url: str) -> None:
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_webview_lib.webview_navigate(self._handle, _encode_c_string(url))
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def run(self) -> None:
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_webview_lib.webview_run(self._handle)
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log.info("Shutting down webview...")
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self.destroy()
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def bind_jsonschema_api(self, api: MethodRegistry) -> None:
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for name, method in api.functions.items():
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wrapper = functools.partial(
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self.api_wrapper,
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api,
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name,
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method,
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)
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c_callback = _webview_lib.CFUNCTYPE(
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None, ctypes.c_char_p, ctypes.c_char_p, ctypes.c_void_p
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)(wrapper)
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if name in self._callbacks:
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msg = f"Callback {name} already exists. Skipping binding."
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raise RuntimeError(msg)
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self._callbacks[name] = c_callback
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_webview_lib.webview_bind(
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self._handle, _encode_c_string(name), c_callback, None
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)
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def bind(self, name: str, callback: Callable[..., Any]) -> None:
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def wrapper(seq: bytes, req: bytes, arg: int) -> None:
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args = json.loads(req.decode())
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try:
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result = callback(*args)
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success = True
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except Exception as e:
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result = str(e)
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success = False
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self.return_(seq.decode(), 0 if success else 1, json.dumps(result))
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c_callback = _webview_lib.CFUNCTYPE(
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None, ctypes.c_char_p, ctypes.c_char_p, ctypes.c_void_p
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)(wrapper)
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self._callbacks[name] = c_callback
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_webview_lib.webview_bind(
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self._handle, _encode_c_string(name), c_callback, None
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)
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def unbind(self, name: str) -> None:
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if name in self._callbacks:
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_webview_lib.webview_unbind(self._handle, _encode_c_string(name))
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del self._callbacks[name]
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def return_(self, seq: str, status: int, result: str) -> None:
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_webview_lib.webview_return(
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self._handle, _encode_c_string(seq), status, _encode_c_string(result)
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)
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def eval(self, source: str) -> None:
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_webview_lib.webview_eval(self._handle, _encode_c_string(source))
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def init(self, source: str) -> None:
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_webview_lib.webview_init(self._handle, _encode_c_string(source))
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if __name__ == "__main__":
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wv = Webview()
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wv.title = "Hello, World!"
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wv.navigate("https://www.google.com")
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wv.run()
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