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small gleam coding and (not yet) persistent agent daemon with a detachable cli forked from okami.mom/albedo
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210"""Plain-data observation schemas, selection, and rendering. No browser I/O here."""
from __future__ import annotations
import jsonfrom typing import Any, NotRequired, TypedDict
from .errors import SelectionError
class Node(TypedDict): id: str ref: str | None role: str name: str frame_id: str parent: str | None depth: int value: NotRequired[Any] href: NotRequired[str] disabled: NotRequired[bool] checked: NotRequired[Any] selected: NotRequired[bool] expanded: NotRequired[bool] readonly: NotRequired[bool] focused: NotRequired[bool] required: NotRequired[bool] level: NotRequired[int] attributes: NotRequired[dict[str, str]] name_truncated: NotRequired[bool]
class Observation(TypedDict): snapshot_id: str target_id: str url: str title: str captured_at: str capture_ms: float nodes: list[Node] frames: list[dict[str, Any]] coverage: dict[str, Any]
# Deliberately exclude value, style, inline handlers and arbitrary data attributes.IDENTITY_ATTRIBUTES = ( "id", "name", "type", "href", "role", "aria-label", "data-testid",)
def attributes_from_snapshot(data: dict[str, Any]) -> dict[int, dict[str, str]]: strings = data.get("strings", []) result = {} for document in data.get("documents", []): nodes = document.get("nodes", {}) for backend_id, attrs in zip( nodes.get("backendNodeId", []), nodes.get("attributes", []) ): pairs = { strings[attrs[i]]: strings[attrs[i + 1]] for i in range(0, len(attrs), 2) } result[backend_id] = { k: pairs[k] for k in IDENTITY_ATTRIBUTES if k in pairs } return result
def attributes_from_node(node: dict[str, Any]) -> dict[str, str]: flat = node.get("attributes", []) attrs = dict(zip(flat[::2], flat[1::2])) return {k: attrs[k] for k in IDENTITY_ATTRIBUTES if k in attrs}
def ax_properties(node: dict[str, Any]) -> dict[str, Any]: return { p["name"]: p.get("value", {}).get("value") for p in node.get("properties", []) }
def walk_ax( nodes: list[dict[str, Any]],) -> list[tuple[dict[str, Any], str | None, int]]: """Reorder Chrome's breadth-first response into reading order, keeping context.""" by_id = {n["nodeId"]: n for n in nodes} roots = [n for n in nodes if n.get("parentId") not in by_id] stack = [(n, None, 0) for n in reversed(roots)] seen = set() result = [] while stack: node, parent, depth = stack.pop() key = node["nodeId"] if key in seen: continue seen.add(key) role = node.get("role", {}).get("value", "") name = node.get("name", {}).get("value", "") keep = not node.get("ignored") and role != "InlineTextBox" if role in ("none", "generic", "LabelText") and not name: keep = False if keep: result.append((node, parent, depth)) for child in reversed(node.get("childIds", [])): if child in by_id: stack.append((by_id[child], key if keep else parent, depth + int(keep))) return result
def find( observation: Observation, *, role: str | None = None, name: str | None = None, text: str | None = None, frame_id: str | None = None, exact: bool = True, **fields: Any,) -> list[Node]: """Pure selection. Exact names are case-sensitive; text is a substring filter.""" result = [] for node in observation["nodes"]: if role is not None and node["role"] != role: continue if frame_id is not None and node["frame_id"] != frame_id: continue if name is not None and not ( node["name"] == name if exact else name in node["name"] ): continue if ( text is not None and text not in node["name"] and text not in str(node.get("value", "")) ): continue if any(node.get(k) != v for k, v in fields.items()): continue result.append(node) return result
def one(observation: Observation, **query: Any) -> Node: """Require exactly one match; never choose the first ambiguous element.""" matches = find(observation, **query) if len(matches) != 1: raise SelectionError( f"Expected one node, found {len(matches)}.", query=query, matches=[ { "ref": n["ref"], "role": n["role"], "name": n["name"], "frame_id": n["frame_id"], } for n in matches[:10] ], observation_complete=observation["coverage"].get("complete", False), ) return matches[0]
def render(observation: Observation, *, max_chars: int = 8000) -> str: """Bounded, escaped text view. The input observation is never changed.""" if max_chars < 128: raise ValueError("max_chars must be at least 128")
def quote(value: Any) -> str: return json.dumps(value, ensure_ascii=False)
lines = [f"Snapshot {observation['snapshot_id']} | {quote(observation['url'])}"] if not observation["coverage"].get("complete"): lines.append( "COVERAGE INCOMPLETE: " + quote(observation["coverage"].get("warnings", [])) ) by_id = {n["id"]: n for n in observation["nodes"]} for node in observation["nodes"]: parent = by_id.get(node["parent"]) if node["role"] == "text" and parent and parent["name"] == node["name"]: continue label = f"[{node['ref']}]" if node["ref"] else "[-]" line = f"{' ' * min(node['depth'], 5)}{label} {node['role']} {quote(node['name'])}" for key in ( "value", "href", "disabled", "checked", "selected", "expanded", "required", ): if key in node: line += f" {key}={quote(node[key])}" if node.get("name_truncated"): line += " [name truncated]" if len(observation["frames"]) > 1: line += f" frame={node['frame_id']}" lines.append(line) text = "\n".join(lines) if len(text) <= max_chars: return text suffix = "\n[RENDER TRUNCATED; structured observation is unchanged]" return text[: max_chars - len(suffix)] + suffix