mirror of
https://github.com/ChuckBuilds/LEDMatrix.git
synced 2026-10-04 14:25:08 +00:00
ChuckandClaude Opus 5.5
8136a2d525
A plugin.reload no longer freezes the panel during Vegas: the old instance is torn down and the new one loaded off the render thread (frame gap 3017 ms -> 9 ms in the ledpi reproduction). A failed or timed-out teardown stops the reload with a restart hint instead of loading over stale modules or tearing down an instance still in use. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
1776 lines
77 KiB
Python
1776 lines
77 KiB
Python
"""
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Plugin Adapter for Vegas Mode
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Converts plugin content to scrollable images. Supports both plugins that
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implement get_vegas_content() and fallback capture of display() output.
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"""
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import logging
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import threading
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import time
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from contextlib import contextmanager, nullcontext
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from typing import Dict, Optional, List, Any, Tuple, Union, TYPE_CHECKING
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from PIL import Image
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from src.common.scroll_helper import ScrollHelper
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from src.plugin_system.base_plugin import BasePlugin as _BasePlugin
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from src.plugin_system.vegas_elements import VegasElement
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from src.vegas_mode.elements import (
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ElementMeta,
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LiveEpochs,
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RenderedElement,
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meta_of,
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pin_element,
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pixel_digest,
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tag,
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untag,
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)
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from src.vegas_mode.geometry import (
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blank_runs,
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separation_gap,
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trim_to_content,
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)
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if TYPE_CHECKING:
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from src.plugin_system.base_plugin import BasePlugin
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logger = logging.getLogger(__name__)
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class PluginAdapter:
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"""
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Adapter for extracting scrollable content from plugins.
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Supports two modes:
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1. Native: Plugin implements get_vegas_content() returning PIL Image(s)
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2. Fallback: Capture display_manager.image after calling plugin.display()
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"""
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#: How long a background fetch waits for a plugin's update() to finish
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#: before skipping the plugin this round. Off the render thread waiting
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#: costs nothing visible; it only delays that one plugin's content.
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PLUGIN_LOCK_TIMEOUT = 2.0
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def __init__(self, display_manager: Any, config: Optional[Any] = None,
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plugin_manager: Optional[Any] = None):
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"""
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Initialize the plugin adapter.
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Args:
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display_manager: DisplayManager instance for fallback capture
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config: VegasModeConfig controlling trim behaviour. When omitted,
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trimming runs with the dataclass defaults, so existing callers
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and tests keep working unchanged.
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plugin_manager: Source of the per-plugin lock that keeps a
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background fetch from running a plugin's display() while its
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update() is mid-flight. Optional: without it, fetches take no
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lock, as they always did.
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"""
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self.display_manager = display_manager
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self.plugin_manager = plugin_manager
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if config is None:
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from src.vegas_mode.config import VegasModeConfig
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config = VegasModeConfig()
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self.config = config
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self.display_width = display_manager.width
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self.display_height = display_manager.height
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# Cache for recently fetched content (prevents redundant fetch)
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self._content_cache: dict = {}
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self._cache_lock = threading.Lock()
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self._cache_ttl = 5.0 # Cache for 5 seconds
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# Per-plugin rotation offset, so a plugin whose content exceeds its
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# width budget shows a different slice on each cycle rather than
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# always the same opening items.
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self._item_offsets: dict = {}
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# What the matching entry in _item_offsets is an offset *into*, as
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# (kind, size). An offset only means anything against the content it
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# was derived from, and there are three incompatible kinds:
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#
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# ('rows', n) index into a list of n images
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# ('cuts', n) index into the n item boundaries of one image
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# ('cols', w) pixel column in a w-wide image with no item boundaries
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#
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# Without this the offsets were reused across kinds — a plugin that
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# returned one wide image on one fetch and several rows on the next had
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# a pixel column of 1400 read back as a row index — and across content
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# changes, where a column recorded against a 9,793px news strip pointed
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# into unrelated headlines once the strip refreshed to 9,505px.
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self._offset_shapes: dict = {}
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# Live elements (src/vegas_mode/elements.py). Switched on by the
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# coordinator for a run in which live updates are active; while off,
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# no plugin is ever asked for elements and every path is as before.
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self.live_elements_enabled = False
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# Per-plugin data epochs, stamped on each element drawn. Set by the
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# coordinator; without it every element is drawn "from epoch 0".
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self.live_epochs: Optional[LiveEpochs] = None
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# Element problems already reported, so a plugin with a bad hook logs
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# once rather than on every fetch.
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self._element_warnings: set = set()
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# (plugin_id, key) -> (version, source image, (padding, height),
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# pinned pixels, digest) of the last conversion, so an element handed
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# back unchanged is not converted again. Only the live-element worker
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# reads or writes it; invalidate_cache() swaps in a fresh one.
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self._element_memo: Dict[Tuple[str, str], Tuple[Any, ...]] = {}
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logger.debug(
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"PluginAdapter initialized: display=%dx%d",
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self.display_width, self.display_height
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)
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def get_content(self, plugin: 'BasePlugin', plugin_id: str,
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offscreen_only: bool = False) -> Optional[List[Image.Image]]:
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"""
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Get scrollable content from a plugin.
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Tries get_vegas_content() first, falls back to display capture.
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Args:
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plugin: Plugin instance to get content from
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plugin_id: Plugin identifier for logging
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offscreen_only: The caller is off the render thread. Every content
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path draws on a canvas of its own (DisplayManager.offscreen),
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so all of them are safe there; the fetch also takes the
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plugin's lock, waiting up to PLUGIN_LOCK_TIMEOUT for a running
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update() to finish. With ``offscreen_prefetch`` switched off,
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the old behaviour applies instead: paths that need a canvas
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return None, leaving the caller to fetch the plugin on the
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render thread.
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Returns:
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List of PIL Images representing plugin content, or None if no content
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"""
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logger.debug(
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"[%s] Getting content (class=%s)",
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plugin_id, plugin.__class__.__name__
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)
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# The old contract, kept behind the switch: background callers may
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# not draw, so anything needing a canvas is left for the render thread.
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restricted = offscreen_only and not getattr(
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self.config, 'offscreen_prefetch', True)
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# Live elements are asked for only on the background fetch, which
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# holds the plugin's lock and draws on a canvas of its own. The render
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# thread's fetches (the first compose, the inline fallback) take no
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# lock, so they keep to get_vegas_content().
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keyed = (offscreen_only and not restricted and self.live_elements_enabled
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and self.is_live_capable(plugin, plugin_id))
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# Check cache first. A keyed fetch looks past legacy content cached
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# by a render-thread fetch, or the plugin would not become live until
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# that entry expired.
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cached = self._get_cached(plugin_id)
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if cached is not None and not (
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keyed and not any(meta_of(img) for img in cached)):
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total_width = sum(img.width for img in cached)
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logger.debug(
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"[%s] Using cached content: %d images, %dpx total",
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plugin_id, len(cached), total_width
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)
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return cached
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if not offscreen_only or restricted:
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return self._fetch_content(plugin, plugin_id, restricted)
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with self._plugin_lock(plugin_id) as acquired:
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if not acquired:
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logger.warning(
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"[%s] update() still running after %.0fs; skipping it this "
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"round", plugin_id, self.PLUGIN_LOCK_TIMEOUT
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)
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return None
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if not self._still_loaded(plugin, plugin_id):
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return None
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return self._fetch_content(plugin, plugin_id, restricted=False,
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keyed=keyed)
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def _still_loaded(self, plugin: 'BasePlugin', plugin_id: str) -> bool:
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"""Whether ``plugin`` is still the loaded instance of ``plugin_id``.
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Checked once the plugin's lock is held: a reload or a disable can
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take the instance out and tear it down while this fetch waited for
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the lock (PluginManager.detach_plugin), and a torn-down instance is
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not asked for content. True when the manager keeps no ``plugins``
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mapping to ask.
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"""
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plugins = getattr(self.plugin_manager, 'plugins', None)
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if not isinstance(plugins, dict) or plugins.get(plugin_id) is plugin:
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return True
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logger.debug("[%s] Unloaded or reloaded while waiting for its lock; "
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"skipping the old instance", plugin_id)
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return False
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def is_live_capable(self, plugin: 'BasePlugin', plugin_id: str) -> bool:
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"""Whether to ask this plugin for live elements rather than pictures.
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It must implement get_vegas_elements() in its own class (a test double
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or a plugin that only inherits BasePlugin's does not count), and its
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config must not set ``vegas_live`` off.
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"""
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method = getattr(type(plugin), 'get_vegas_elements', None)
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if method is None or method is _BasePlugin.get_vegas_elements:
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return False
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raw = self._plugin_setting(plugin, 'vegas_live')
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if raw is None:
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return True
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if isinstance(raw, str):
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return raw.strip().lower() not in ('false', '0', 'off', 'no')
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return bool(raw)
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@contextmanager
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def _plugin_lock(self, plugin_id: str, timeout: Optional[float] = None):
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"""Hold the plugin's update/display lock, waiting a bounded time.
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Yields whether it was acquired. Yields True, holding nothing, when
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there is no plugin manager to ask -- the behaviour before the lock was
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taken here at all. ``timeout`` defaults to PLUGIN_LOCK_TIMEOUT; 0
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does not wait at all.
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"""
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if not hasattr(self.plugin_manager, 'get_plugin_lock'):
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yield True
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return
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lock = self.plugin_manager.get_plugin_lock(plugin_id)
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wait = self.PLUGIN_LOCK_TIMEOUT if timeout is None else timeout
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acquired = lock.acquire(timeout=wait) if wait > 0 else lock.acquire(blocking=False)
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try:
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yield acquired
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finally:
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if acquired:
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lock.release()
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@contextmanager
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def _isolated_canvas(self, width: Optional[int] = None):
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"""A canvas for the plugin to draw on that nothing else sees.
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DisplayManager.offscreen() gives the calling thread its own canvas, so
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this is safe on any thread and leaves the shared canvas untouched.
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Older display managers and test doubles without it get the previous
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behaviour: capture on the shared canvas, narrowed with render_size,
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then restore it -- which is only safe on the render thread.
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"""
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offscreen = getattr(self.display_manager, 'offscreen', None)
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if offscreen is not None:
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with offscreen(width):
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yield
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return
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original_image = self.display_manager.image.copy()
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try:
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with self._capture(), self._render_at(width or self.display_width):
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yield
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finally:
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self.display_manager.image = original_image
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def _fetch_content(
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self, plugin: 'BasePlugin', plugin_id: str, restricted: bool,
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keyed: bool = False
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) -> Optional[List[Image.Image]]:
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"""Every content path in order: elements, native, scroll helper, capture.
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``restricted`` is the pre-offscreen contract for background callers:
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skip every path that needs a canvas and return None instead.
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``keyed`` asks for live elements first (see get_content).
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"""
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if keyed:
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content = self._get_keyed_content(plugin, plugin_id)
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if content:
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return self._finalize(content, plugin_id, 'elements', plugin)
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logger.debug("[%s] No live elements; using its Vegas content", plugin_id)
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# Try native Vegas content method first
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has_native = hasattr(plugin, 'get_vegas_content')
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logger.debug("[%s] Has get_vegas_content: %s", plugin_id, has_native)
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if has_native:
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content = self._get_native_content(plugin, plugin_id, restricted)
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if content:
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total_width = sum(img.width for img in content)
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logger.debug(
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"[%s] Native content SUCCESS: %d images, %dpx total",
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plugin_id, len(content), total_width
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)
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return self._finalize(content, plugin_id, 'native', plugin)
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logger.debug("[%s] Native content returned None", plugin_id)
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# Try to get scroll_helper's cached image (for scrolling plugins like stocks/odds)
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has_scroll_helper = hasattr(plugin, 'scroll_helper')
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logger.debug("[%s] Has scroll_helper: %s", plugin_id, has_scroll_helper)
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content = self._get_scroll_helper_content(plugin, plugin_id, restricted)
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if content:
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total_width = sum(img.width for img in content)
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logger.debug(
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"[%s] ScrollHelper content SUCCESS: %d images, %dpx total",
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plugin_id, len(content), total_width
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)
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return self._finalize(content, plugin_id, 'scroll_helper', plugin)
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if has_scroll_helper:
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logger.debug("[%s] ScrollHelper content returned None", plugin_id)
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if restricted:
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# Display capture needs a canvas; leave it to the caller.
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logger.debug(
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"[%s] Needs display capture, deferring to the render thread",
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plugin_id
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)
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return None
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# Fall back to display capture
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logger.debug("[%s] Trying fallback display capture...", plugin_id)
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content = self._capture_display_content(plugin, plugin_id)
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if content:
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total_width = sum(img.width for img in content)
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logger.debug(
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"[%s] Fallback capture SUCCESS: %d images, %dpx total",
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plugin_id, len(content), total_width
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)
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return self._finalize(content, plugin_id, 'fallback', plugin)
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logger.warning(
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"[%s] NO CONTENT from any method (native=%s, scroll_helper=%s, fallback=tried)",
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plugin_id, has_native, has_scroll_helper
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)
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return None
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def _finalize(
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self, images: List[Image.Image], plugin_id: str, source: str,
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plugin: Optional['BasePlugin'] = None
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) -> Optional[List[Image.Image]]:
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"""
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Trim dead space off a segment, then cache it.
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Every content path funnels through here so trimming is applied
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uniformly; a plugin that renders onto a full-display canvas would
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otherwise contribute its whole blank canvas to the ticker.
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Each image is trimmed independently. The render pipeline joins one
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plugin's images with a gap measured from their ink
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(RenderPipeline._join_plugin_rows) and puts separator_width only
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between plugins, so the margins a row keeps are content_padding, not
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whatever blank canvas the plugin happened to draw it on.
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Args:
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images: Raw content from one of the fetch paths
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plugin_id: Plugin identifier for logging
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source: Which path produced the content, for logging
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Returns:
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Trimmed image list, or None if nothing worth showing remains
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"""
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if not self.config.auto_trim:
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# Trimming is off, but the width budget is a separate concern —
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# turning off margin cropping should not let one plugin hold the
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# panel for minutes. Skipping it here previously let a 14,848px
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# segment through untouched.
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kept = self._apply_width_budget(list(images), plugin_id, plugin)
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self._cache_content(plugin_id, kept)
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return kept
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original_width = sum(img.width for img in images)
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kept: List[Image.Image] = []
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dropped_blank = 0
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for img in images:
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if meta_of(img) is not None:
|
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# A live element is pinned, not trimmed: it already carries
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# the margin trimming would leave, and its width must not
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# follow its ink, or a redraw could never be swapped in place.
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kept.append(img)
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continue
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result = trim_to_content(
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img,
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threshold=self.config.trim_threshold,
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padding=self.config.content_padding,
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)
|
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if result.is_blank:
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dropped_blank += 1
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continue
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kept.append(result.image)
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if not kept:
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logger.debug(
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"[%s] All %d image(s) from %s were blank — contributing nothing",
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plugin_id, len(images), source
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)
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return None
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trimmed_width = sum(img.width for img in kept)
|
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|
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if trimmed_width < self.config.min_plugin_width:
|
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logger.debug(
|
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"[%s] Trimmed content %dpx is below min_plugin_width %dpx — skipping",
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plugin_id, trimmed_width, self.config.min_plugin_width
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)
|
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return None
|
|
|
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if trimmed_width != original_width or dropped_blank:
|
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logger.debug(
|
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"[%s] Trimmed %s content: %dpx -> %dpx (%.0f%% reclaimed), "
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"%d image(s) kept, %d blank dropped",
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plugin_id, source, original_width, trimmed_width,
|
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100.0 * (original_width - trimmed_width) / original_width
|
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if original_width else 0.0,
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len(kept), dropped_blank
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)
|
|
|
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kept = self._apply_width_budget(kept, plugin_id, plugin)
|
|
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self._cache_content(plugin_id, kept)
|
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return kept
|
|
|
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def _capture(self):
|
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"""
|
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Context manager suppressing hardware writes while plugin render code runs.
|
|
|
|
Degrades to a no-op when the display manager predates capture_mode. As
|
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with _render_at, losing the suppression risks a visible flash, whereas
|
|
raising would be swallowed by the broad handlers upstream and drop the
|
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plugin's content entirely — much worse.
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|
"""
|
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capture_mode = getattr(self.display_manager, 'capture_mode', None)
|
|
if capture_mode is None:
|
|
logger.debug(
|
|
"display_manager has no capture_mode(); plugin writes during "
|
|
"content capture may reach the panel"
|
|
)
|
|
return nullcontext()
|
|
return capture_mode()
|
|
|
|
def _render_at(self, width: int):
|
|
"""
|
|
Context manager narrowing the plugin-facing canvas to ``width``.
|
|
|
|
Degrades to a no-op when the display manager predates render_size (a
|
|
third-party or older test harness). Losing the narrowing is a cosmetic
|
|
regression; raising here would be caught by the broad handlers upstream
|
|
and silently drop the plugin's content entirely.
|
|
"""
|
|
render_size = getattr(self.display_manager, 'render_size', None)
|
|
if render_size is None:
|
|
logger.debug(
|
|
"display_manager has no render_size(); Vegas width requests "
|
|
"will be ignored"
|
|
)
|
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return nullcontext()
|
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return render_size(width)
|
|
|
|
def resolve_render_width(self, plugin: 'BasePlugin', plugin_id: str) -> int:
|
|
"""
|
|
Width to tell a plugin it has while it renders for the ticker.
|
|
|
|
Resolution order, most specific first:
|
|
1. the plugin's own ``vegas_width_pct`` config value
|
|
2. the global ``vegas_scroll.render_width_pct``
|
|
3. the full panel width
|
|
|
|
A percentage rather than an absolute width so one setting travels
|
|
across panel sizes.
|
|
|
|
Args:
|
|
plugin: Plugin instance, consulted for a per-plugin override
|
|
plugin_id: Plugin identifier for logging
|
|
|
|
Returns:
|
|
Target width in pixels, never wider than the panel
|
|
"""
|
|
pct = self.config.render_width_pct
|
|
|
|
plugin_cfg = getattr(plugin, 'config', None)
|
|
if isinstance(plugin_cfg, dict):
|
|
raw = plugin_cfg.get('vegas_width_pct')
|
|
if raw not in (None, ''):
|
|
# Reported once per value: the live paths resolve the width on
|
|
# every redraw, several times a second for an animated element.
|
|
try:
|
|
candidate = int(raw)
|
|
except (TypeError, ValueError):
|
|
self._warn_element_once(
|
|
plugin_id, "Invalid vegas_width_pct %r, ignoring", raw,
|
|
once_key=repr(raw))
|
|
else:
|
|
if 10 <= candidate <= 100:
|
|
pct = candidate
|
|
else:
|
|
self._warn_element_once(
|
|
plugin_id, "vegas_width_pct %d out of range 10-100, ignoring",
|
|
candidate, once_key=repr(raw))
|
|
|
|
if pct >= 100:
|
|
return self.display_width
|
|
return max(1, int(self.display_width * pct / 100))
|
|
|
|
def _row_gap(self, left: Image.Image, right: Image.Image) -> int:
|
|
"""
|
|
Gap the compositor will insert between two of a plugin's rows.
|
|
|
|
Mirrors RenderPipeline._join_plugin_rows so the width budget measures
|
|
what will actually be rendered.
|
|
"""
|
|
return separation_gap(
|
|
left, right,
|
|
target=max(0, self.config.min_content_separation),
|
|
minimum=max(0, self.config.intra_plugin_gap),
|
|
threshold=self.config.trim_threshold,
|
|
)
|
|
|
|
def _plugin_setting(self, plugin: 'BasePlugin', key: str):
|
|
"""Read a per-plugin config override, or None if absent."""
|
|
plugin_cfg = getattr(plugin, 'config', None)
|
|
if not isinstance(plugin_cfg, dict):
|
|
return None
|
|
value = plugin_cfg.get(key)
|
|
return None if value in (None, '') else value
|
|
|
|
def resolve_overflow_mode(self, plugin: 'BasePlugin', plugin_id: str) -> str:
|
|
"""
|
|
How to handle content that exceeds this plugin's width budget.
|
|
|
|
'rotate' advances a window each cycle so everything is seen eventually,
|
|
which suits interchangeable items. 'truncate' always shows the start,
|
|
which suits ordered content — a league table that shows ranks 1-6 and
|
|
then resumes at 7 two rotations later reads as out of order, and nobody
|
|
needs rank 23 in a ticker anyway.
|
|
|
|
Per-plugin ``vegas_overflow`` wins over the global ``overflow_mode``.
|
|
"""
|
|
raw = self._plugin_setting(plugin, 'vegas_overflow')
|
|
if raw is not None:
|
|
candidate = str(raw).strip().lower()
|
|
if candidate in ('rotate', 'truncate'):
|
|
return candidate
|
|
logger.warning(
|
|
"[%s] Invalid vegas_overflow %r, expected 'rotate' or 'truncate'",
|
|
plugin_id, raw
|
|
)
|
|
return self.config.overflow_mode
|
|
|
|
def _width_budget(self, plugin: Optional['BasePlugin'] = None,
|
|
plugin_id: str = '') -> int:
|
|
"""
|
|
Maximum columns one plugin may occupy in a cycle. 0 means unlimited.
|
|
|
|
A per-plugin ``vegas_max_width_screens`` overrides the global ratio, so
|
|
content that has to stay whole can be given room (or uncapped with 0)
|
|
without lifting the cap on every ticker.
|
|
"""
|
|
ratio = self.config.max_plugin_width_ratio
|
|
|
|
if plugin is not None:
|
|
raw = self._plugin_setting(plugin, 'vegas_max_width_screens')
|
|
if raw is not None:
|
|
try:
|
|
candidate = float(raw)
|
|
except (TypeError, ValueError):
|
|
logger.warning(
|
|
"[%s] Invalid vegas_max_width_screens %r, ignoring",
|
|
plugin_id, raw
|
|
)
|
|
else:
|
|
if candidate >= 0:
|
|
ratio = candidate
|
|
else:
|
|
logger.warning(
|
|
"[%s] vegas_max_width_screens must be >= 0, got %s",
|
|
plugin_id, candidate
|
|
)
|
|
|
|
if ratio <= 0:
|
|
return 0
|
|
return int(self.display_width * ratio)
|
|
|
|
def _resume_offset(self, plugin_id: str, shape: Tuple[str, int]) -> int:
|
|
"""
|
|
The plugin's stored rotation offset, if it still applies.
|
|
|
|
An offset is only meaningful against content shaped the way it was
|
|
when the offset was recorded. When the shape has changed — a different
|
|
number of rows, a re-rendered strip with different item boundaries —
|
|
the stored value points somewhere arbitrary, so rotation restarts.
|
|
|
|
Args:
|
|
plugin_id: Plugin identifier
|
|
shape: (kind, size) describing what an offset would index into now
|
|
|
|
Returns:
|
|
The stored offset, or 0 when it no longer applies
|
|
"""
|
|
if self._offset_shapes.get(plugin_id) != shape:
|
|
if plugin_id in self._item_offsets:
|
|
logger.debug(
|
|
"[%s] Content is %s now, was %s — restarting the rotation "
|
|
"rather than resuming at a position that no longer means "
|
|
"anything", plugin_id, shape,
|
|
self._offset_shapes.get(plugin_id))
|
|
self._item_offsets.pop(plugin_id, None)
|
|
self._offset_shapes[plugin_id] = shape
|
|
return 0
|
|
return self._item_offsets.get(plugin_id, 0)
|
|
|
|
def _record_offset(
|
|
self, plugin_id: str, offset: int, shape: Tuple[str, int]
|
|
) -> None:
|
|
"""Store where the next window should resume, with what it indexes."""
|
|
if offset:
|
|
self._item_offsets[plugin_id] = offset
|
|
self._offset_shapes[plugin_id] = shape
|
|
else:
|
|
# A wrapped-to-zero rotation is the same as no state at all, and
|
|
# keeping the key would report a window as active when the next
|
|
# pass starts from the top anyway.
|
|
self._item_offsets.pop(plugin_id, None)
|
|
self._offset_shapes.pop(plugin_id, None)
|
|
|
|
def _clear_offset(self, plugin_id: str) -> None:
|
|
"""Forget any rotation state for a plugin."""
|
|
self._item_offsets.pop(plugin_id, None)
|
|
self._offset_shapes.pop(plugin_id, None)
|
|
|
|
def _merge_trailing_runt(self, end: int, width: int, budget: int) -> int:
|
|
"""
|
|
Extend a window to the end of the content when what would be left over
|
|
is too small to be worth its own pass.
|
|
|
|
Windows were placed by walking forward from the last one, which makes
|
|
the final window whatever happens to remain. Measured on a live panel
|
|
that produced a 1,840px stocks ticker splitting 1,492 + 348 — the
|
|
second pass showing seven seconds of content before cutting, which
|
|
reads as the display failing rather than as a rotation.
|
|
|
|
Absorbing the remainder overruns the budget by less than one window
|
|
floor, which is a better trade than a fragment: the budget is a guard
|
|
against one plugin holding the panel for minutes, not a hard limit.
|
|
|
|
Args:
|
|
end: Column the window would otherwise end at
|
|
width: Full content width
|
|
budget: Width budget being applied
|
|
|
|
Returns:
|
|
``end``, or ``width`` when the remainder is below the floor
|
|
"""
|
|
remainder = width - end
|
|
# Measured against the budget rather than the panel: snapping to item
|
|
# boundaries means an ordinary window already lands short of the budget
|
|
# (a 512px budget over 182px-pitch items yields 348px windows), so an
|
|
# absolute floor would merge windows that were never fragments. Half a
|
|
# budget separates "a short last pass" from "a sliver", and caps the
|
|
# overrun this can cause at 1.5 budgets.
|
|
floor = budget // 2
|
|
if 0 < remainder < floor:
|
|
return width
|
|
return end
|
|
|
|
def _apply_width_budget(
|
|
self, images: List[Image.Image], plugin_id: str,
|
|
plugin: Optional['BasePlugin'] = None
|
|
) -> List[Image.Image]:
|
|
"""
|
|
Hold one plugin to its share of a cycle.
|
|
|
|
A ticker returning 7,000px would otherwise own the panel for over two
|
|
minutes, which defeats the point of a rotation. Overflow is deferred
|
|
rather than discarded: the starting offset advances each time this
|
|
plugin is fetched, so later items appear on subsequent cycles instead
|
|
of never being seen.
|
|
|
|
Args:
|
|
images: Trimmed images for this plugin
|
|
plugin_id: Plugin identifier, used to track its rotation offset
|
|
|
|
Returns:
|
|
Images that fit the budget, starting from the plugin's current
|
|
rotation offset.
|
|
"""
|
|
budget = self._width_budget(plugin, plugin_id)
|
|
mode = (self.resolve_overflow_mode(plugin, plugin_id)
|
|
if plugin is not None else self.config.overflow_mode)
|
|
|
|
# Count the gaps the compositor will actually insert, not just the
|
|
# pixels of the rows — otherwise a plugin with many rows quietly
|
|
# occupies far more of the panel than its budget allows. These must use
|
|
# the same measured rule as RenderPipeline._join_plugin_rows; assuming
|
|
# the flat intra_plugin_gap here under-counted by up to
|
|
# (min_content_separation - intra_plugin_gap) per row.
|
|
total = sum(img.width for img in images) + sum(
|
|
self._row_gap(images[i], images[i + 1]) for i in range(len(images) - 1)
|
|
)
|
|
|
|
if not budget or total <= budget:
|
|
# Fits, so reset rotation — the whole segment is being shown.
|
|
self._clear_offset(plugin_id)
|
|
return images
|
|
|
|
if len(images) == 1:
|
|
only = images[0]
|
|
if meta_of(only) is not None and only.width - 2 * self._padding() <= budget:
|
|
# A live element's pinned margins are not content. One whose
|
|
# drawing fits the budget is kept whole, and live, rather than
|
|
# cut for the sake of its own blank padding.
|
|
self._clear_offset(plugin_id)
|
|
return images
|
|
# A cropped live element is only part of itself, so it can no
|
|
# longer be swapped whole: it scrolls by as plain content.
|
|
return [untag(self._crop_to_budget(only, budget, plugin_id, mode))]
|
|
|
|
shape = ('rows', len(images))
|
|
if mode == 'truncate':
|
|
# Ordered content: always show from the top. Deliberately does not
|
|
# advance the offset, so the same opening items appear every time
|
|
# rather than the viewer being shown the middle of a ranked list.
|
|
start = 0
|
|
else:
|
|
start = self._resume_offset(plugin_id, shape) % len(images)
|
|
selected: List[Image.Image] = []
|
|
used = 0
|
|
consumed = 0
|
|
|
|
# Walk forward from the rotation offset, taking whole items only, so a
|
|
# cut never lands in the middle of one.
|
|
#
|
|
# A window may overrun the budget while it is still shorter than the
|
|
# runt floor, for the same reason _merge_trailing_runt exists on the
|
|
# single-image path: a pass far shorter than its neighbours reads as
|
|
# the display failing rather than as a rotation. Rows of 450, 450 and
|
|
# 100 against a 512px budget used to give the 100 a pass of its own --
|
|
# two seconds against nine. Wrapping does not prevent that, because it
|
|
# only helps when the row wrapped to actually fits.
|
|
floor = budget // 2
|
|
for step in range(len(images)):
|
|
img = images[(start + step) % len(images)]
|
|
cost = img.width
|
|
if selected:
|
|
cost += self._row_gap(selected[-1], img)
|
|
if selected and used + cost > budget:
|
|
# Keep the overrun bounded at the same 1.5 budgets the
|
|
# single-image path allows. A next row too wide to absorb
|
|
# leaves a short window standing -- better than a window of
|
|
# 1.9 budgets, and the same trade the always-take-the-first
|
|
# rule below already makes.
|
|
if used >= floor or used + cost > budget + floor:
|
|
break
|
|
selected.append(img)
|
|
used += cost
|
|
consumed += 1
|
|
|
|
if mode == 'truncate':
|
|
logger.debug(
|
|
"[%s] Width budget %dpx: showing the first %d of %d row(s) "
|
|
"(%dpx incl. gaps); the rest are not shown (overflow=truncate)",
|
|
plugin_id, budget, len(selected), len(images), used
|
|
)
|
|
else:
|
|
self._record_offset(
|
|
plugin_id, (start + consumed) % len(images), shape)
|
|
logger.debug(
|
|
"[%s] Width budget %dpx: showing %d of %d row(s) (%dpx incl. gaps) "
|
|
"from offset %d; remainder deferred to a later cycle",
|
|
plugin_id, budget, len(selected), len(images), used, start
|
|
)
|
|
return selected
|
|
|
|
def _crop_to_budget(
|
|
self, img: Image.Image, budget: int, plugin_id: str,
|
|
mode: str = 'rotate'
|
|
) -> Image.Image:
|
|
"""
|
|
Narrow a single oversized image to the budget, advancing a window
|
|
through it across cycles.
|
|
|
|
Cuts land only at item boundaries: the middle of a blank run at least
|
|
``min_cut_gap`` columns wide. The window ends at the last boundary
|
|
inside the budget, or overruns to the next one when there is none, so
|
|
an item is never sliced. An image with no such runs (a map, a chart)
|
|
is continuous content and is cropped to the budget exactly.
|
|
|
|
Rotation is tracked as an index into the strip's item boundaries rather
|
|
than as a pixel column, because a ticker re-renders between fetches. A
|
|
column recorded against one render points at unrelated content in the
|
|
next as soon as anything ahead of it changes width — a digit in a
|
|
price, a shorter headline. The Nth boundary stays the Nth boundary.
|
|
"""
|
|
# Cut only where the plugin left a real gap between items. Snapping to
|
|
# any blank column used to pick the single-column gaps between
|
|
# characters, splitting a word and orphaning its tail into the next
|
|
# cycle — a lone "y" from "Wednesday" floating between two unrelated
|
|
# plugins. Overshooting the budget is the lesser evil.
|
|
min_run = max(2, self.config.min_cut_gap)
|
|
# A run touching either edge is the image's margin -- the
|
|
# content_padding trimming leaves, or a live element's pinned padding
|
|
# -- not a gap between items. Cutting mid-margin gave a window of a few
|
|
# blank columns, and a solid image with margins no continuous crop.
|
|
gaps = [(a, b) for a, b in blank_runs(img, min_run, self.config.trim_threshold)
|
|
if a > 0 and b < img.width]
|
|
|
|
if not gaps:
|
|
# No internal gaps means continuous content — a map, a chart, a
|
|
# photo — where any column is as good as any other, so cut to the
|
|
# budget exactly. The gap rule exists to protect discrete items
|
|
# (words, ticker entries); it would be wrong to let a solid image
|
|
# escape the cap in its name.
|
|
#
|
|
# With no items to index, the offset here has to stay a column, so
|
|
# it is only reusable while the image keeps its width.
|
|
shape = ('cols', img.width)
|
|
offset = 0 if mode == 'truncate' else self._resume_offset(
|
|
plugin_id, shape)
|
|
end = self._merge_trailing_runt(
|
|
min(offset + budget, img.width), img.width, budget)
|
|
if mode != 'truncate':
|
|
self._record_offset(
|
|
plugin_id, 0 if end >= img.width else end, shape)
|
|
logger.debug(
|
|
"[%s] Width budget %dpx: cropped continuous %dpx image to "
|
|
"[%d:%d] (no item gaps of %dpx+ to align to)%s",
|
|
plugin_id, budget, img.width, offset, end, min_run,
|
|
"" if mode != 'truncate' else "; showing the start only"
|
|
)
|
|
return img.crop((offset, 0, end, img.height))
|
|
|
|
# Cut mid-gap so the content either side keeps some breathing room.
|
|
cuts = sorted({0, img.width} | {(a + b) // 2 for a, b in gaps})
|
|
|
|
shape = ('cuts', len(cuts))
|
|
index = 0 if mode == 'truncate' else self._resume_offset(
|
|
plugin_id, shape)
|
|
# Clamped rather than wrapped: a stale index past the end means the
|
|
# strip shrank, and restarting reads better than landing near the end.
|
|
start_index = index if 0 <= index < len(cuts) - 1 else 0
|
|
start = cuts[start_index]
|
|
|
|
later = cuts[start_index + 1:]
|
|
if not later:
|
|
end = img.width
|
|
else:
|
|
within = [c for c in later if c <= start + budget]
|
|
# No boundary inside the budget: take the next one and overrun,
|
|
# because the alternative is cutting through an item.
|
|
end = max(within) if within else min(later)
|
|
end = self._merge_trailing_runt(end, img.width, budget)
|
|
# Every candidate for `end` came from `cuts` (which includes img.width),
|
|
# so this always resolves; the fallback is defensive only.
|
|
end_index = cuts.index(end) if end in cuts else len(cuts) - 1
|
|
|
|
if mode != 'truncate':
|
|
# Next cycle resumes at the boundary this one stopped on; wrap when
|
|
# the strip ends.
|
|
self._record_offset(
|
|
plugin_id, 0 if end >= img.width else end_index, shape)
|
|
|
|
logger.debug(
|
|
"[%s] Width budget %dpx: cropped single %dpx image to [%d:%d] "
|
|
"(%dpx) at item boundaries %d-%d of %d, %s",
|
|
plugin_id, budget, img.width, start, end, end - start,
|
|
start_index, end_index, len(cuts) - 1,
|
|
"showing the start only (overflow=truncate)"
|
|
if mode == 'truncate' else "window advances next cycle"
|
|
)
|
|
return img.crop((start, 0, end, img.height))
|
|
|
|
def _warn_element_once(self, plugin_id: str, problem: str, *args: Any,
|
|
once_key: Optional[str] = None) -> None:
|
|
"""Report a plugin's problem once per process, then quietly.
|
|
|
|
Once per ``problem`` (the format string), or per ``once_key`` within it
|
|
when given, so a different bad value is still reported.
|
|
"""
|
|
key = (plugin_id, problem, once_key)
|
|
if key in self._element_warnings:
|
|
logger.debug("[%s] " + problem, plugin_id, *args)
|
|
return
|
|
self._element_warnings.add(key)
|
|
logger.warning("[%s] " + problem, plugin_id, *args)
|
|
|
|
def _get_keyed_content(
|
|
self, plugin: 'BasePlugin', plugin_id: str
|
|
) -> Optional[List[Image.Image]]:
|
|
"""The plugin's live elements, as tagged images, or None.
|
|
|
|
Called with the plugin's lock held (get_content), so update() is not
|
|
running and the plugin's data epoch cannot move while it draws. Drawn
|
|
on a canvas of the plugin's own at its render width, like
|
|
get_vegas_content(). Any failure returns None, and the caller falls
|
|
back to the plugin's ordinary Vegas content.
|
|
"""
|
|
epochs = self.live_epochs
|
|
epoch = epochs.get(plugin_id) if epochs is not None else 0
|
|
render_width = self.resolve_render_width(plugin, plugin_id)
|
|
plugin._vegas_render_width = render_width
|
|
try:
|
|
with self._isolated_canvas(render_width):
|
|
result = plugin.get_vegas_elements()
|
|
except Exception as exc: # pylint: disable=broad-except
|
|
# A plugin hook can raise anything; the legacy content still works.
|
|
self._warn_element_once(
|
|
plugin_id, "get_vegas_elements() raised %r; using its "
|
|
"get_vegas_content() instead", exc)
|
|
return None
|
|
finally:
|
|
plugin._vegas_render_width = None
|
|
try:
|
|
return self._images_from_elements(result, plugin_id, epoch)
|
|
except Exception as exc: # pylint: disable=broad-except
|
|
# Converting is per element and guarded; this is the backstop, so
|
|
# nothing a plugin hands back can cost it its ordinary content.
|
|
self._warn_element_once(
|
|
plugin_id, "get_vegas_elements() returned elements that could not "
|
|
"be used (%r); using its get_vegas_content() instead", exc)
|
|
return None
|
|
|
|
def render_live_elements(
|
|
self, plugin: 'BasePlugin', plugin_id: str, lock_timeout: float
|
|
) -> Optional[Tuple[int, Dict[str, RenderedElement]]]:
|
|
"""Redraw a plugin's live elements for the live-element worker.
|
|
|
|
Like the keyed fetch, but for a strip that already holds the elements:
|
|
no cache (the caller knows the plugin's data moved on), and each live
|
|
element comes back as a RenderedElement to compare with what the strip
|
|
shows. An element whose ``version`` is the one already redrawn reuses
|
|
its pinned pixels and digest, so an unchanged scoreboard costs the
|
|
plugin's own version check and no conversion.
|
|
|
|
Returns ``(epoch, {key: element})``, the epoch read under the lock; an
|
|
empty dict when the plugin had nothing (or failed, logged once). None
|
|
only when the lock could not be had within ``lock_timeout`` -- the
|
|
caller tries again later.
|
|
"""
|
|
with self._plugin_lock(plugin_id, timeout=lock_timeout) as acquired:
|
|
if not acquired:
|
|
return None
|
|
epochs = self.live_epochs
|
|
epoch = epochs.get(plugin_id) if epochs is not None else 0
|
|
if not self._still_loaded(plugin, plugin_id):
|
|
return epoch, {}
|
|
render_width = self.resolve_render_width(plugin, plugin_id)
|
|
plugin._vegas_render_width = render_width
|
|
try:
|
|
with self._isolated_canvas(render_width):
|
|
result = plugin.get_vegas_elements()
|
|
except Exception as exc: # pylint: disable=broad-except
|
|
self._warn_element_once(
|
|
plugin_id, "get_vegas_elements() raised %r while redrawing; "
|
|
"its elements keep what they show", exc)
|
|
return epoch, {}
|
|
finally:
|
|
plugin._vegas_render_width = None
|
|
return epoch, self._rendered_from_elements(result, plugin_id, epoch)
|
|
|
|
@staticmethod
|
|
def has_lock_free_redraw(plugin: Any) -> bool:
|
|
"""Whether the plugin's class overrides BasePlugin.redraw_vegas_element."""
|
|
method = getattr(type(plugin), 'redraw_vegas_element', None)
|
|
return method is not None and method is not _BasePlugin.redraw_vegas_element
|
|
|
|
def redraw_live_element(
|
|
self, plugin: 'BasePlugin', plugin_id: str, key: str, width: int,
|
|
height: int, at: float
|
|
) -> Optional[RenderedElement]:
|
|
"""One element redrawn for a moment in time, without the plugin's lock.
|
|
|
|
``width`` is the element's width in the strip (pinned); the plugin is
|
|
asked for that less its padding, exactly, and anything else is
|
|
refused. None when the plugin has no lock-free redraw, returns None,
|
|
or fails (logged once).
|
|
"""
|
|
if not self.has_lock_free_redraw(plugin):
|
|
return None
|
|
padding = self._padding()
|
|
inner = width - 2 * padding
|
|
if inner <= 0:
|
|
return None
|
|
epochs = self.live_epochs
|
|
epoch = epochs.get(plugin_id) if epochs is not None else 0
|
|
render_width = self.resolve_render_width(plugin, plugin_id)
|
|
plugin._vegas_render_width = render_width
|
|
try:
|
|
with self._isolated_canvas(render_width):
|
|
image = plugin.redraw_vegas_element(key, inner, height, at)
|
|
except Exception as exc: # pylint: disable=broad-except
|
|
self._warn_element_once(
|
|
plugin_id, "redraw_vegas_element(%r) raised %r", key, exc)
|
|
return None
|
|
finally:
|
|
plugin._vegas_render_width = None
|
|
if image is None:
|
|
return None
|
|
if not isinstance(image, Image.Image) or image.size != (inner, height):
|
|
self._warn_element_once(
|
|
plugin_id, "redraw_vegas_element(%r) returned %s, expected an "
|
|
"image of %dx%d; ignoring it", key,
|
|
f"{image.width}x{image.height}" if isinstance(image, Image.Image)
|
|
else type(image).__name__, inner, height)
|
|
return None
|
|
_pinned, pixels = pin_element(image, padding)
|
|
return RenderedElement(key=key, epoch=epoch, version=None, pixels=pixels,
|
|
digest=pixel_digest(pixels), width=pixels.shape[1])
|
|
|
|
def _valid_elements(self, result: Any, plugin_id: str) -> Optional[List[VegasElement]]:
|
|
"""The usable elements in a get_vegas_elements() answer, in order.
|
|
|
|
None for no answer (the plugin wants its ordinary content). Anything
|
|
that is not a VegasElement with a key and a non-empty image is
|
|
dropped, and a duplicate key keeps its first element, each reported
|
|
once.
|
|
"""
|
|
if result is None:
|
|
return None
|
|
if not isinstance(result, (list, tuple)):
|
|
self._warn_element_once(
|
|
plugin_id, "get_vegas_elements() returned %s, expected a list "
|
|
"of VegasElement", type(result).__name__)
|
|
return None
|
|
seen = set()
|
|
valid: List[VegasElement] = []
|
|
for element in result:
|
|
if not (isinstance(element, VegasElement)
|
|
and isinstance(element.key, str) and element.key
|
|
and isinstance(element.image, Image.Image)):
|
|
self._warn_element_once(
|
|
plugin_id, "get_vegas_elements() returned an item that is "
|
|
"not a VegasElement with a key and an image (%s); skipping it",
|
|
type(element).__name__)
|
|
continue
|
|
if element.image.width <= 0 or element.image.height <= 0:
|
|
self._warn_element_once(
|
|
plugin_id, "get_vegas_elements() returned an empty image for "
|
|
"%r; skipping it", element.key)
|
|
continue
|
|
if element.key in seen:
|
|
self._warn_element_once(
|
|
plugin_id, "get_vegas_elements() returned key %r twice; "
|
|
"keeping the first", element.key)
|
|
continue
|
|
seen.add(element.key)
|
|
valid.append(element)
|
|
return valid
|
|
|
|
def _element_image(self, element: VegasElement) -> Image.Image:
|
|
"""An element's image at the display's height, in RGB."""
|
|
image = element.image
|
|
if image.height != self.display_height:
|
|
image = image.resize((image.width, self.display_height),
|
|
Image.Resampling.LANCZOS)
|
|
if image.mode != 'RGB':
|
|
image = image.convert('RGB')
|
|
return image
|
|
|
|
def _padding(self) -> int:
|
|
"""Black columns a live element carries each side: what trimming would leave."""
|
|
return self.config.content_padding if self.config.auto_trim else 0
|
|
|
|
@staticmethod
|
|
def _refresh_hz(element: VegasElement) -> float:
|
|
try:
|
|
return max(0.0, float(element.refresh_hz or 0.0))
|
|
except (TypeError, ValueError):
|
|
return 0.0
|
|
|
|
def _images_from_elements(
|
|
self, result: Any, plugin_id: str, epoch: int
|
|
) -> Optional[List[Image.Image]]:
|
|
"""Turn get_vegas_elements()'s answer into images for the pipeline.
|
|
|
|
Live elements come out pinned (RGB, display height, content_padding
|
|
black each side, never trimmed afterwards) and tagged with their
|
|
ElementMeta; plain ones (``live=False``) come out as ordinary content.
|
|
"""
|
|
elements = self._valid_elements(result, plugin_id)
|
|
if elements is None:
|
|
return None
|
|
padding = self._padding()
|
|
now = time.monotonic()
|
|
images: List[Image.Image] = []
|
|
for element in elements:
|
|
try:
|
|
image = self._element_image(element)
|
|
if not element.live:
|
|
# Plain content; a tag copied from a reused image must not
|
|
# make it live by accident.
|
|
images.append(untag(image.copy()) if meta_of(image) else image)
|
|
continue
|
|
pinned, pixels = pin_element(image, padding)
|
|
except Exception as exc: # pylint: disable=broad-except
|
|
# An image Pillow cannot resize or convert (an odd mode, a
|
|
# closed file) costs that element, not its neighbours.
|
|
self._warn_element_once(
|
|
plugin_id, "element %r could not be converted (%r); skipping it",
|
|
element.key, exc)
|
|
continue
|
|
images.append(tag(pinned, ElementMeta(
|
|
plugin_id=plugin_id, key=element.key, epoch=epoch,
|
|
digest=pixel_digest(pixels), rendered_at=now,
|
|
refresh_hz=self._refresh_hz(element), version=element.version)))
|
|
return images or None
|
|
|
|
def _rendered_from_elements(
|
|
self, result: Any, plugin_id: str, epoch: int
|
|
) -> Dict[str, RenderedElement]:
|
|
"""RenderedElements for the live elements in a get_vegas_elements() answer.
|
|
|
|
An element handed back as the very image last converted for its key,
|
|
with the same ``version``, reuses that conversion's pinned pixels and
|
|
digest, so nothing is converted or checksummed. The image must be the
|
|
same object: a plugin redrawn for a new config (new colours, a
|
|
different font) can keep its data version, and must not keep its old
|
|
pixels with it.
|
|
"""
|
|
elements = self._valid_elements(result, plugin_id) or []
|
|
padding = self._padding()
|
|
memo = self._element_memo
|
|
rendered: Dict[str, RenderedElement] = {}
|
|
for element in elements:
|
|
if not element.live:
|
|
continue
|
|
memo_key = (plugin_id, element.key)
|
|
cached = memo.get(memo_key)
|
|
if cached is not None and element.version is not None \
|
|
and cached[0] == element.version and cached[1] is element.image \
|
|
and cached[2] == (padding, self.display_height):
|
|
pixels, digest = cached[3], cached[4]
|
|
else:
|
|
try:
|
|
_pinned, pixels = pin_element(self._element_image(element), padding)
|
|
except Exception as exc: # pylint: disable=broad-except
|
|
self._warn_element_once(
|
|
plugin_id, "element %r could not be converted (%r); it "
|
|
"keeps what it shows", element.key, exc)
|
|
continue
|
|
digest = pixel_digest(pixels)
|
|
memo[memo_key] = (element.version, element.image,
|
|
(padding, self.display_height), pixels, digest)
|
|
rendered[element.key] = RenderedElement(
|
|
key=element.key, epoch=epoch, version=element.version,
|
|
pixels=pixels, digest=digest, width=pixels.shape[1])
|
|
# Forget keys the plugin no longer has, so the memo stays its size.
|
|
stale = [k for k in list(memo)
|
|
if k[0] == plugin_id and k[1] not in rendered]
|
|
for memo_key in stale:
|
|
memo.pop(memo_key, None)
|
|
return rendered
|
|
|
|
def _get_native_content(
|
|
self, plugin: 'BasePlugin', plugin_id: str, restricted: bool = False
|
|
) -> Optional[List[Image.Image]]:
|
|
"""
|
|
Get content via plugin's native get_vegas_content() method.
|
|
|
|
Args:
|
|
plugin: Plugin instance
|
|
plugin_id: Plugin identifier
|
|
|
|
Returns:
|
|
List of images or None
|
|
"""
|
|
try:
|
|
logger.debug("[%s] Native: calling get_vegas_content()", plugin_id)
|
|
|
|
# Tell the plugin how much width the ticker wants it to use, and
|
|
# narrow the canvas for the duration of the call. A plugin that
|
|
# sizes its own images from display_manager.matrix.width picks up
|
|
# the narrower value with no changes of its own; one that wants to
|
|
# be explicit can read get_vegas_render_width().
|
|
render_width = self.resolve_render_width(plugin, plugin_id)
|
|
if render_width != self.display_width:
|
|
logger.debug(
|
|
"[%s] Native: requesting %dpx instead of %dpx",
|
|
plugin_id, render_width, self.display_width
|
|
)
|
|
|
|
plugin._vegas_render_width = render_width
|
|
try:
|
|
# On a canvas of its own even at full width. Building Vegas
|
|
# content is an off-screen operation, but a plugin is free to
|
|
# call update_display() while doing it, and on the shared canvas
|
|
# that write would land on the hardware, flashing the panel
|
|
# mid-scroll.
|
|
if restricted:
|
|
# Restricted (offscreen_prefetch off): no canvas of our own,
|
|
# so no narrowing. _vegas_render_width is set regardless: a
|
|
# plugin reading get_vegas_render_width() still gets its
|
|
# narrow size, and one that only reads matrix.width renders
|
|
# full width and is trimmed instead.
|
|
with self._capture():
|
|
result = plugin.get_vegas_content()
|
|
else:
|
|
with self._isolated_canvas(render_width):
|
|
result = plugin.get_vegas_content()
|
|
finally:
|
|
plugin._vegas_render_width = None
|
|
|
|
if result is None:
|
|
logger.debug("[%s] Native: get_vegas_content() returned None", plugin_id)
|
|
return None
|
|
|
|
# Normalize to list
|
|
if isinstance(result, Image.Image):
|
|
images = [result]
|
|
logger.debug(
|
|
"[%s] Native: got single Image %dx%d",
|
|
plugin_id, result.width, result.height
|
|
)
|
|
elif isinstance(result, (list, tuple)):
|
|
images = list(result)
|
|
logger.debug(
|
|
"[%s] Native: got %d items in list/tuple",
|
|
plugin_id, len(images)
|
|
)
|
|
else:
|
|
logger.warning(
|
|
"[%s] Native: unexpected return type: %s",
|
|
plugin_id, type(result).__name__
|
|
)
|
|
return None
|
|
|
|
# Validate images
|
|
valid_images = []
|
|
for i, img in enumerate(images):
|
|
if not isinstance(img, Image.Image):
|
|
logger.warning(
|
|
"[%s] Native: item[%d] is not an Image: %s",
|
|
plugin_id, i, type(img).__name__
|
|
)
|
|
continue
|
|
|
|
logger.debug(
|
|
"[%s] Native: item[%d] is %dx%d, mode=%s",
|
|
plugin_id, i, img.width, img.height, img.mode
|
|
)
|
|
|
|
# Ensure correct height
|
|
if img.height != self.display_height:
|
|
logger.debug(
|
|
"[%s] Native: resizing item[%d]: %dx%d -> %dx%d",
|
|
plugin_id, i, img.width, img.height,
|
|
img.width, self.display_height
|
|
)
|
|
img = img.resize(
|
|
(img.width, self.display_height),
|
|
Image.Resampling.LANCZOS
|
|
)
|
|
|
|
# Convert to RGB if needed
|
|
if img.mode != 'RGB':
|
|
img = img.convert('RGB')
|
|
|
|
valid_images.append(img)
|
|
|
|
if valid_images:
|
|
total_width = sum(img.width for img in valid_images)
|
|
logger.debug(
|
|
"[%s] Native: SUCCESS - %d images, %dpx total width",
|
|
plugin_id, len(valid_images), total_width
|
|
)
|
|
return valid_images
|
|
|
|
logger.debug("[%s] Native: no valid images after validation", plugin_id)
|
|
return None
|
|
|
|
except (AttributeError, TypeError, ValueError, OSError) as e:
|
|
logger.exception(
|
|
"[%s] Native: ERROR calling get_vegas_content(): %s",
|
|
plugin_id, e
|
|
)
|
|
return None
|
|
|
|
def _get_scroll_helper_content(
|
|
self, plugin: 'BasePlugin', plugin_id: str, restricted: bool = False
|
|
) -> Optional[List[Image.Image]]:
|
|
"""
|
|
Get content from plugin's scroll_helper if available.
|
|
|
|
Many scrolling plugins (stocks, odds) use a ScrollHelper that caches
|
|
their full scrolling image. This method extracts that image for Vegas
|
|
mode instead of falling back to single-frame capture.
|
|
|
|
Args:
|
|
plugin: Plugin instance
|
|
plugin_id: Plugin identifier
|
|
|
|
Returns:
|
|
List with the cached scroll image, or None if not available
|
|
"""
|
|
try:
|
|
# Check for scroll_helper with cached_image
|
|
scroll_helper = getattr(plugin, 'scroll_helper', None)
|
|
if scroll_helper is None:
|
|
logger.debug("[%s] No scroll_helper attribute", plugin_id)
|
|
return None
|
|
|
|
logger.debug(
|
|
"[%s] Found scroll_helper: %s",
|
|
plugin_id, type(scroll_helper).__name__
|
|
)
|
|
|
|
cached_image = getattr(scroll_helper, 'cached_image', None)
|
|
if cached_image is None:
|
|
logger.debug(
|
|
"[%s] scroll_helper.cached_image is None, triggering content generation",
|
|
plugin_id
|
|
)
|
|
if restricted:
|
|
# Generating it calls display(), which needs the canvas.
|
|
logger.debug(
|
|
"[%s] scroll_helper cache empty; deferring generation "
|
|
"to the render thread", plugin_id
|
|
)
|
|
return None
|
|
# Try to trigger scroll content generation
|
|
cached_image = self._trigger_scroll_content_generation(
|
|
plugin, plugin_id, scroll_helper
|
|
)
|
|
if cached_image is None:
|
|
return None
|
|
|
|
if not isinstance(cached_image, Image.Image):
|
|
logger.debug(
|
|
"[%s] scroll_helper.cached_image is not an Image: %s",
|
|
plugin_id, type(cached_image).__name__
|
|
)
|
|
return None
|
|
|
|
logger.debug(
|
|
"[%s] scroll_helper.cached_image found: %dx%d, mode=%s",
|
|
plugin_id, cached_image.width, cached_image.height, cached_image.mode
|
|
)
|
|
|
|
# Copy the image to prevent modification
|
|
img = cached_image.copy()
|
|
|
|
# Plugins that build their own ticker image via this shared
|
|
# ScrollHelper's create_scrolling_image() get a solid-black
|
|
# leading margin exactly `display_width` columns wide baked in
|
|
# (scroll_helper.py's "initial gap before first item"). Vegas mode
|
|
# adds its own leading gap/separator around every item already,
|
|
# so leaving this in stacks a second, uncontrolled blank margin on
|
|
# top of vegas_scroll.separator_width — making this plugin's
|
|
# transitions look inconsistent with plugins that provide content
|
|
# via get_vegas_content() (which carries no such margin). Strip it
|
|
# here so every plugin contributes only its real content and the
|
|
# gap between items is governed solely by separator_width.
|
|
img = self._strip_scroll_padding(img, scroll_helper, plugin_id)
|
|
|
|
# Ensure correct height
|
|
if img.height != self.display_height:
|
|
logger.debug(
|
|
"[%s] Resizing scroll_helper content: %dx%d -> %dx%d",
|
|
plugin_id, img.width, img.height,
|
|
img.width, self.display_height
|
|
)
|
|
img = img.resize(
|
|
(img.width, self.display_height),
|
|
Image.Resampling.LANCZOS
|
|
)
|
|
|
|
# Convert to RGB if needed
|
|
if img.mode != 'RGB':
|
|
img = img.convert('RGB')
|
|
|
|
logger.debug(
|
|
"[%s] ScrollHelper content ready: %dx%d",
|
|
plugin_id, img.width, img.height
|
|
)
|
|
|
|
return [img]
|
|
|
|
except (AttributeError, TypeError, ValueError, OSError):
|
|
logger.exception("[%s] Error getting scroll_helper content", plugin_id)
|
|
return None
|
|
|
|
def _strip_scroll_padding(
|
|
self, img: Image.Image, scroll_helper: Any, plugin_id: str
|
|
) -> Image.Image:
|
|
"""
|
|
Crop off a plugin's own leading/trailing blank margins, if present.
|
|
|
|
create_scrolling_image() always pads the *start* of its cached image
|
|
with exactly `scroll_helper.display_width` columns of solid black
|
|
(0, 0, 0) ("initial gap before first item"). Some ticker-style plugins
|
|
also pad the *end* of their own cached image (e.g. so their standalone
|
|
display exits cleanly before looping). Vegas mode already adds its own
|
|
gap/separator around every item, so either margin left in place stacks
|
|
an extra, uncontrolled blank stretch on top of `separator_width` —
|
|
only when running inside Vegas mode does this matter, since the
|
|
plugin's own standalone display still wants that margin. Detect solid
|
|
black margins up to `scroll_helper.display_width` wide on each edge and
|
|
crop them here. Images built via set_scrolling_image() (no such
|
|
margins) are left untouched.
|
|
|
|
Args:
|
|
img: Captured scroll_helper.cached_image (already copied)
|
|
scroll_helper: The plugin's ScrollHelper instance
|
|
plugin_id: Plugin identifier for logging
|
|
|
|
Returns:
|
|
img, cropped on whichever edge(s) had a matching blank margin
|
|
"""
|
|
pad_width = getattr(scroll_helper, 'display_width', None)
|
|
if not isinstance(pad_width, int) or pad_width <= 0 or pad_width >= img.width:
|
|
return img
|
|
|
|
def is_solid_black(strip: Image.Image) -> bool:
|
|
return strip.convert('RGB').getextrema() == ((0, 0), (0, 0), (0, 0))
|
|
|
|
left = pad_width if is_solid_black(img.crop((0, 0, pad_width, img.height))) else 0
|
|
right = (
|
|
pad_width
|
|
if is_solid_black(img.crop((img.width - pad_width, 0, img.width, img.height)))
|
|
else 0
|
|
)
|
|
|
|
if not left and not right:
|
|
return img
|
|
|
|
# Degenerate case (e.g. an all-black cached image): don't crop past
|
|
# zero width, just leave the image as-is.
|
|
if left + right >= img.width:
|
|
return img
|
|
|
|
cropped = img.crop((left, 0, img.width - right, img.height))
|
|
|
|
# Both edges matching at once is a much stronger signal of genuine
|
|
# baked-in padding than a single edge (which has a small chance of
|
|
# coinciding with real all-black content, e.g. a dark logo touching
|
|
# one boundary). Log that case at warning level so an unexpected
|
|
# double-edge crop is easy to spot in the field.
|
|
log = logger.warning if (left and right) else logger.info
|
|
log(
|
|
"[%s] Stripping scroll_helper padding (left=%dpx, right=%dpx): %dpx -> %dpx",
|
|
plugin_id, left, right, img.width, cropped.width
|
|
)
|
|
return cropped
|
|
|
|
def _trigger_scroll_content_generation(
|
|
self, plugin: 'BasePlugin', plugin_id: str, scroll_helper: Any
|
|
) -> Optional[Image.Image]:
|
|
"""
|
|
Trigger scroll content generation for plugins that haven't built it yet.
|
|
|
|
Tries multiple approaches:
|
|
1. _create_scrolling_display() - stocks plugin pattern
|
|
2. display(force_clear=True) - general pattern that populates scroll cache
|
|
|
|
Args:
|
|
plugin: Plugin instance
|
|
plugin_id: Plugin identifier
|
|
scroll_helper: Plugin's scroll_helper instance
|
|
|
|
Returns:
|
|
The generated cached_image or None
|
|
"""
|
|
try:
|
|
with self._isolated_canvas():
|
|
# Method 1: Try _create_scrolling_display (stocks pattern)
|
|
if hasattr(plugin, '_create_scrolling_display'):
|
|
logger.debug(
|
|
"[%s] Triggering via _create_scrolling_display()",
|
|
plugin_id
|
|
)
|
|
try:
|
|
plugin._create_scrolling_display()
|
|
cached_image = getattr(scroll_helper, 'cached_image', None)
|
|
if cached_image is not None and isinstance(cached_image, Image.Image):
|
|
logger.debug(
|
|
"[%s] _create_scrolling_display() SUCCESS: %dx%d",
|
|
plugin_id, cached_image.width, cached_image.height
|
|
)
|
|
return cached_image
|
|
except (AttributeError, TypeError, ValueError, OSError):
|
|
logger.exception(
|
|
"[%s] _create_scrolling_display() failed", plugin_id
|
|
)
|
|
|
|
# Method 2: Try display(force_clear=True) which typically builds scroll content
|
|
if hasattr(plugin, 'display'):
|
|
logger.debug(
|
|
"[%s] Triggering via display(force_clear=True)",
|
|
plugin_id
|
|
)
|
|
try:
|
|
self.display_manager.clear()
|
|
plugin.display(force_clear=True)
|
|
cached_image = getattr(scroll_helper, 'cached_image', None)
|
|
if cached_image is not None and isinstance(cached_image, Image.Image):
|
|
logger.debug(
|
|
"[%s] display(force_clear=True) SUCCESS: %dx%d",
|
|
plugin_id, cached_image.width, cached_image.height
|
|
)
|
|
return cached_image
|
|
logger.debug(
|
|
"[%s] display(force_clear=True) did not populate cached_image",
|
|
plugin_id
|
|
)
|
|
except (AttributeError, TypeError, ValueError, OSError):
|
|
logger.exception(
|
|
"[%s] display(force_clear=True) failed", plugin_id
|
|
)
|
|
|
|
logger.debug(
|
|
"[%s] Could not trigger scroll content generation",
|
|
plugin_id
|
|
)
|
|
return None
|
|
|
|
except (AttributeError, TypeError, ValueError, OSError):
|
|
logger.exception("[%s] Error triggering scroll content", plugin_id)
|
|
return None
|
|
|
|
def _capture_display_content(
|
|
self, plugin: 'BasePlugin', plugin_id: str
|
|
) -> Optional[List[Image.Image]]:
|
|
"""
|
|
Capture content by calling plugin.display() and grabbing the frame.
|
|
|
|
Args:
|
|
plugin: Plugin instance
|
|
plugin_id: Plugin identifier
|
|
|
|
Returns:
|
|
List with single captured image, or None
|
|
"""
|
|
try:
|
|
# Ensure plugin has fresh data before capturing
|
|
has_update_data = hasattr(plugin, 'update_data')
|
|
logger.debug("[%s] Fallback: has update_data=%s", plugin_id, has_update_data)
|
|
if has_update_data:
|
|
try:
|
|
plugin.update_data()
|
|
logger.debug("[%s] Fallback: update_data() called", plugin_id)
|
|
except (AttributeError, RuntimeError, OSError):
|
|
logger.exception("[%s] Fallback: update_data() failed", plugin_id)
|
|
|
|
# Clear and call plugin display on a canvas of its own: nothing it
|
|
# draws, and no update_display() it calls, reaches the panel.
|
|
#
|
|
# The canvas is render_width wide, so a plugin that spreads across
|
|
# the whole panel produces a compact arrangement rather than one
|
|
# that has to be cropped afterwards.
|
|
render_width = self.resolve_render_width(plugin, plugin_id)
|
|
if render_width != self.display_width:
|
|
logger.debug(
|
|
"[%s] Fallback: rendering at %dpx instead of %dpx",
|
|
plugin_id, render_width, self.display_width
|
|
)
|
|
|
|
with self._isolated_canvas(render_width):
|
|
self.display_manager.clear()
|
|
logger.debug("[%s] Fallback: display cleared, calling display()", plugin_id)
|
|
|
|
# First try without force_clear (some plugins behave better this way)
|
|
try:
|
|
plugin.display()
|
|
logger.debug("[%s] Fallback: display() called successfully", plugin_id)
|
|
except TypeError:
|
|
# Plugin may require force_clear argument
|
|
logger.debug("[%s] Fallback: display() failed, trying with force_clear=True", plugin_id)
|
|
plugin.display(force_clear=True)
|
|
|
|
# Capture the result
|
|
captured = self.display_manager.image.copy()
|
|
|
|
logger.debug(
|
|
"[%s] Fallback: captured frame %dx%d, mode=%s",
|
|
plugin_id, captured.width, captured.height, captured.mode
|
|
)
|
|
|
|
# Check if captured image has content (not all black)
|
|
is_blank, bright_ratio = self._is_blank_image(captured, return_ratio=True)
|
|
logger.debug(
|
|
"[%s] Fallback: brightness check - %.3f%% bright pixels (threshold=0.5%%)",
|
|
plugin_id, bright_ratio * 100
|
|
)
|
|
|
|
if is_blank:
|
|
logger.debug(
|
|
"[%s] Fallback: first capture blank, retrying with force_clear",
|
|
plugin_id
|
|
)
|
|
# Try once more with force_clear=True
|
|
with self._isolated_canvas(render_width):
|
|
self.display_manager.clear()
|
|
plugin.display(force_clear=True)
|
|
captured = self.display_manager.image.copy()
|
|
|
|
is_blank, bright_ratio = self._is_blank_image(captured, return_ratio=True)
|
|
logger.debug(
|
|
"[%s] Fallback: retry brightness - %.3f%% bright pixels",
|
|
plugin_id, bright_ratio * 100
|
|
)
|
|
|
|
if is_blank:
|
|
logger.warning(
|
|
"[%s] Fallback: BLANK IMAGE after retry (%.3f%% bright, size=%dx%d)",
|
|
plugin_id, bright_ratio * 100,
|
|
captured.width, captured.height
|
|
)
|
|
return None
|
|
|
|
# Convert to RGB if needed
|
|
if captured.mode != 'RGB':
|
|
captured = captured.convert('RGB')
|
|
|
|
logger.debug(
|
|
"[%s] Fallback: SUCCESS - captured %dx%d",
|
|
plugin_id, captured.width, captured.height
|
|
)
|
|
|
|
return [captured]
|
|
|
|
except (AttributeError, TypeError, ValueError, OSError, RuntimeError) as e:
|
|
logger.exception(
|
|
"[%s] Fallback: ERROR capturing display: %s",
|
|
plugin_id, e
|
|
)
|
|
return None
|
|
|
|
def _is_blank_image(
|
|
self, img: Image.Image, return_ratio: bool = False
|
|
) -> Union[bool, Tuple[bool, float]]:
|
|
"""
|
|
Check if an image is essentially blank (all black or nearly so).
|
|
|
|
Uses histogram-based detection which is more reliable than
|
|
point sampling for content that may be positioned anywhere.
|
|
|
|
Args:
|
|
img: Image to check
|
|
return_ratio: If True, return tuple of (is_blank, bright_ratio)
|
|
|
|
Returns:
|
|
True if image is blank, or tuple (is_blank, bright_ratio) if return_ratio=True
|
|
"""
|
|
# Convert to RGB for consistent checking
|
|
if img.mode != 'RGB':
|
|
img = img.convert('RGB')
|
|
|
|
# Use histogram to check for any non-black content
|
|
# This is more reliable than point sampling
|
|
histogram = img.histogram()
|
|
|
|
# RGB histogram: 256 values per channel
|
|
# Check if there's any significant brightness in any channel
|
|
total_bright_pixels = 0
|
|
threshold = 15 # Minimum brightness to count as "content"
|
|
|
|
for channel_offset in [0, 256, 512]: # R, G, B
|
|
for brightness in range(threshold, 256):
|
|
total_bright_pixels += histogram[channel_offset + brightness]
|
|
|
|
# If less than 0.5% of pixels have any brightness, consider blank
|
|
total_pixels = img.width * img.height
|
|
bright_ratio = total_bright_pixels / (total_pixels * 3) # Normalize across channels
|
|
|
|
is_blank = bright_ratio < 0.005 # Less than 0.5% bright pixels
|
|
|
|
if return_ratio:
|
|
return is_blank, bright_ratio
|
|
return is_blank
|
|
|
|
def _get_cached(self, plugin_id: str) -> Optional[List[Image.Image]]:
|
|
"""Get cached content if still valid."""
|
|
with self._cache_lock:
|
|
if plugin_id not in self._content_cache:
|
|
return None
|
|
|
|
cached_time, content = self._content_cache[plugin_id]
|
|
if time.time() - cached_time > self._cache_ttl:
|
|
del self._content_cache[plugin_id]
|
|
return None
|
|
|
|
return content
|
|
|
|
def _cache_content(self, plugin_id: str, content: List[Image.Image]) -> None:
|
|
"""Cache content for a plugin."""
|
|
# Make copies to prevent mutation (done outside lock to minimize hold time)
|
|
cached_content = [img.copy() for img in content]
|
|
|
|
with self._cache_lock:
|
|
# Periodic cleanup of expired entries to prevent memory leak
|
|
self._cleanup_expired_cache_locked()
|
|
self._content_cache[plugin_id] = (time.time(), cached_content)
|
|
|
|
def _cleanup_expired_cache_locked(self) -> None:
|
|
"""Remove expired entries from cache. Must be called with _cache_lock held."""
|
|
current_time = time.time()
|
|
expired_keys = [
|
|
key for key, (cached_time, _) in self._content_cache.items()
|
|
if current_time - cached_time > self._cache_ttl
|
|
]
|
|
for key in expired_keys:
|
|
del self._content_cache[key]
|
|
|
|
def invalidate_cache(self, plugin_id: Optional[str] = None) -> None:
|
|
"""
|
|
Invalidate cached content.
|
|
|
|
Args:
|
|
plugin_id: Specific plugin to invalidate, or None for all
|
|
"""
|
|
with self._cache_lock:
|
|
if plugin_id:
|
|
self._content_cache.pop(plugin_id, None)
|
|
else:
|
|
self._content_cache.clear()
|
|
# A config change, most often. Swapped rather than cleared:
|
|
# the live-element worker may be iterating the old one.
|
|
self._element_memo = {}
|
|
|
|
def invalidate_plugin_scroll_cache(
|
|
self, plugin: 'BasePlugin', plugin_id: str
|
|
) -> bool:
|
|
"""
|
|
Drop a plugin's own cached scroll image so its visual is rebuilt.
|
|
|
|
Invalidating only this adapter's cache is not enough. A plugin that
|
|
composes a scroll strip hands back the *same* image every time until its
|
|
own cache is cleared — the sports plugins' ``get_vegas_content()``
|
|
regenerates only "if the cache is empty" — so without this a segment
|
|
keeps rendering whatever data it was first built from. That is how a
|
|
game that was live last night can still be displayed as live the next
|
|
morning.
|
|
|
|
Two layouts to cover: a helper directly on the plugin (stocks, news,
|
|
odds-ticker) and one owned by a scroll-display manager (the sports
|
|
scoreboards). ``cached_image`` and ``cached_array`` must be cleared
|
|
together, since the array is the image's numpy mirror and code paths
|
|
read whichever is convenient.
|
|
|
|
Returns:
|
|
True if a cache was found and cleared.
|
|
"""
|
|
cleared = False
|
|
for owner in (plugin, getattr(plugin, '_scroll_manager', None),
|
|
getattr(plugin, 'scroll_manager', None)):
|
|
if owner is None:
|
|
continue
|
|
helper = getattr(owner, 'scroll_helper', None)
|
|
if helper is None:
|
|
continue
|
|
try:
|
|
# has_strip() rather than reading cached_image, which would
|
|
# build a deferred image only to throw it away.
|
|
if isinstance(helper, ScrollHelper):
|
|
has_image = helper.has_strip()
|
|
else:
|
|
has_image = getattr(helper, 'cached_image', None) is not None
|
|
if has_image:
|
|
helper.cached_image = None
|
|
cleared = True
|
|
if getattr(helper, 'cached_array', None) is not None:
|
|
helper.cached_array = None
|
|
cleared = True
|
|
except Exception: # pylint: disable=broad-except
|
|
logger.exception(
|
|
"[%s] Could not clear scroll cache on %s",
|
|
plugin_id, type(owner).__name__
|
|
)
|
|
if cleared:
|
|
logger.debug("[%s] Cleared plugin scroll cache", plugin_id)
|
|
return cleared
|
|
|
|
def cleanup(self) -> None:
|
|
"""Clean up resources."""
|
|
with self._cache_lock:
|
|
self._content_cache.clear()
|
|
logger.debug("PluginAdapter cleanup complete")
|