ekklesiaandClaude Opus 5
719b856040
classroom-dvd-session needs to ask sway whether VLC has taken the screen, which is the same tree walking classroom-window already does. One copy, in a module both import; classroom-window loses a third of its length. The state machine is worth protecting through a move like that, so its regression test comes with it: the exact swaymsg commands for launch, focus, minimise, restore, Super+M, Super+Shift+M, the scratchpad rescue and sway not running at all. Co-Authored-By: Claude Opus 5 <[email protected]>
123 lines
3.1 KiB
Python
123 lines
3.1 KiB
Python
"""Talking to sway.
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Shared by classroom-window, which moves windows around, and by
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classroom-dvd-session, which needs to know when VLC has actually taken
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the screen.
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"""
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import json
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import re
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import subprocess
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HIDDEN_WORKSPACE = "__ekklesia_hidden"
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# sway parks scratchpad windows on a workspace of its own. Nothing here
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# puts them there, but treating it as hidden means a window left in the
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# scratchpad by an older classroom build can still be restored.
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HIDDEN_WORKSPACES = {HIDDEN_WORKSPACE, "__i3_scratch"}
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def swaymsg(*arguments):
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"""Run swaymsg, returning stdout or None when sway is unavailable."""
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try:
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result = subprocess.run(
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["swaymsg", *arguments],
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capture_output=True,
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text=True,
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)
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except (OSError, subprocess.SubprocessError):
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return None
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if result.returncode != 0:
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return None
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return result.stdout
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def command(argument):
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"""Run a sway command, ignoring criteria that match nothing."""
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swaymsg("--", argument)
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def query(kind):
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output = swaymsg("-t", kind, "-r")
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if not output:
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return None
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try:
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return json.loads(output)
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except ValueError:
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return None
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def collect(node, workspace, found):
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"""Flatten the sway tree into the windows the classroom cares about."""
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if node.get("type") == "workspace":
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workspace = node.get("name")
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is_window = node.get("pid") is not None and not node.get("nodes")
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if is_window:
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properties = node.get("window_properties") or {}
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found.append(
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{
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"id": node.get("id"),
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"app_id": node.get("app_id") or "",
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"class": properties.get("class") or "",
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"instance": properties.get("instance") or "",
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"focused": bool(node.get("focused")),
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"fullscreen": bool(node.get("fullscreen_mode")),
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"workspace": workspace,
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"hidden": workspace in HIDDEN_WORKSPACES,
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}
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)
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for child in node.get("nodes", []) + node.get("floating_nodes", []):
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collect(child, workspace, found)
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return found
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def windows():
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tree = query("get_tree")
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if tree is None:
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return []
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return collect(tree, None, [])
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def matches(window, patterns):
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"""Match a window against app_id / X11 class / X11 instance."""
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identities = [
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window["app_id"],
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window["class"],
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window["instance"],
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]
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for pattern in patterns:
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expression = re.compile(pattern, re.IGNORECASE)
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for identity in identities:
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if identity and expression.fullmatch(identity):
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return True
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return False
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def visible_workspace():
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"""The workspace a restored window should come back to."""
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workspaces = query("get_workspaces") or []
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for workspace in workspaces:
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if workspace.get("focused") and workspace.get("name") not in HIDDEN_WORKSPACES:
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return workspace.get("name")
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for workspace in workspaces:
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if workspace.get("visible") and workspace.get("name") not in HIDDEN_WORKSPACES:
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return workspace.get("name")
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return "1"
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