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Font allow using google fonts directly (#3243)
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parent
48584e94c4
commit
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1 changed files with 147 additions and 4 deletions
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@ -1,12 +1,29 @@
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import functools
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from pathlib import Path
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import hashlib
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import re
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import requests
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from esphome import core
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from esphome.components import display
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import esphome.config_validation as cv
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import esphome.codegen as cg
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from esphome.const import CONF_FILE, CONF_GLYPHS, CONF_ID, CONF_RAW_DATA_ID, CONF_SIZE
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from esphome.const import (
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CONF_FAMILY,
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CONF_FILE,
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CONF_GLYPHS,
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CONF_ID,
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CONF_RAW_DATA_ID,
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CONF_TYPE,
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CONF_SIZE,
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CONF_PATH,
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CONF_WEIGHT,
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)
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from esphome.core import CORE, HexInt
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DOMAIN = "font"
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DEPENDENCIES = ["display"]
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MULTI_CONF = True
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@ -71,6 +88,128 @@ def validate_truetype_file(value):
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return cv.file_(value)
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def _compute_gfonts_local_path(value) -> Path:
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name = f"{value[CONF_FAMILY]}@{value[CONF_WEIGHT]}@{value[CONF_ITALIC]}@v1"
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base_dir = Path(CORE.config_dir) / ".esphome" / DOMAIN
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h = hashlib.new("sha256")
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h.update(name.encode())
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return base_dir / h.hexdigest()[:8] / "font.ttf"
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TYPE_LOCAL = "local"
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TYPE_GFONTS = "gfonts"
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LOCAL_SCHEMA = cv.Schema(
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{
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cv.Required(CONF_PATH): validate_truetype_file,
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}
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)
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CONF_ITALIC = "italic"
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FONT_WEIGHTS = {
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"thin": 100,
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"extra-light": 200,
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"light": 300,
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"regular": 400,
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"medium": 500,
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"semi-bold": 600,
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"bold": 700,
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"extra-bold": 800,
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"black": 900,
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}
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def validate_weight_name(value):
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return FONT_WEIGHTS[cv.one_of(*FONT_WEIGHTS, lower=True, space="-")(value)]
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def download_gfonts(value):
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wght = value[CONF_WEIGHT]
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if value[CONF_ITALIC]:
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wght = f"1,{wght}"
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name = f"{value[CONF_FAMILY]}@{value[CONF_WEIGHT]}"
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url = f"https://fonts.googleapis.com/css2?family={value[CONF_FAMILY]}:wght@{wght}"
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path = _compute_gfonts_local_path(value)
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if path.is_file():
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return value
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try:
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req = requests.get(url)
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req.raise_for_status()
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except requests.exceptions.RequestException as e:
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raise cv.Invalid(
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f"Could not download font for {name}, please check the fonts exists "
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f"at google fonts ({e})"
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)
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match = re.search(r"src:\s+url\((.+)\)\s+format\('truetype'\);", req.text)
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if match is None:
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raise cv.Invalid(
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f"Could not extract ttf file from gfonts response for {name}, "
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f"please report this."
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)
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ttf_url = match.group(1)
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try:
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req = requests.get(ttf_url)
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req.raise_for_status()
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except requests.exceptions.RequestException as e:
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raise cv.Invalid(f"Could not download ttf file for {name} ({ttf_url}): {e}")
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path.parent.mkdir(exist_ok=True, parents=True)
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path.write_bytes(req.content)
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return value
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GFONTS_SCHEMA = cv.All(
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{
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cv.Required(CONF_FAMILY): cv.string_strict,
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cv.Optional(CONF_WEIGHT, default="regular"): cv.Any(
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cv.int_, validate_weight_name
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),
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cv.Optional(CONF_ITALIC, default=False): cv.boolean,
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},
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download_gfonts,
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)
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def validate_file_shorthand(value):
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value = cv.string_strict(value)
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if value.startswith("gfonts://"):
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match = re.match(r"^gfonts://([^@]+)(@.+)?$", value)
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if match is None:
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raise cv.Invalid("Could not parse gfonts shorthand syntax, please check it")
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family = match.group(1)
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weight = match.group(2)
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data = {
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CONF_TYPE: TYPE_GFONTS,
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CONF_FAMILY: family,
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}
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if weight is not None:
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data[CONF_WEIGHT] = weight[1:]
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return FILE_SCHEMA(data)
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return FILE_SCHEMA(
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{
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CONF_TYPE: TYPE_LOCAL,
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CONF_PATH: value,
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}
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)
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TYPED_FILE_SCHEMA = cv.typed_schema(
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{
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TYPE_LOCAL: LOCAL_SCHEMA,
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TYPE_GFONTS: GFONTS_SCHEMA,
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}
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)
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def _file_schema(value):
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if isinstance(value, str):
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return validate_file_shorthand(value)
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return TYPED_FILE_SCHEMA(value)
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FILE_SCHEMA = cv.Schema(_file_schema)
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DEFAULT_GLYPHS = (
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' !"%()+=,-.:/0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz°'
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)
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@ -79,7 +218,7 @@ CONF_RAW_GLYPH_ID = "raw_glyph_id"
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FONT_SCHEMA = cv.Schema(
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{
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cv.Required(CONF_ID): cv.declare_id(Font),
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cv.Required(CONF_FILE): validate_truetype_file,
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cv.Required(CONF_FILE): FILE_SCHEMA,
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cv.Optional(CONF_GLYPHS, default=DEFAULT_GLYPHS): validate_glyphs,
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cv.Optional(CONF_SIZE, default=20): cv.int_range(min=1),
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cv.GenerateID(CONF_RAW_DATA_ID): cv.declare_id(cg.uint8),
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@ -93,9 +232,13 @@ CONFIG_SCHEMA = cv.All(validate_pillow_installed, FONT_SCHEMA)
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async def to_code(config):
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from PIL import ImageFont
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path = CORE.relative_config_path(config[CONF_FILE])
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conf = config[CONF_FILE]
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if conf[CONF_TYPE] == TYPE_LOCAL:
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path = CORE.relative_config_path(conf[CONF_PATH])
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elif conf[CONF_TYPE] == TYPE_GFONTS:
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path = _compute_gfonts_local_path(conf)
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try:
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font = ImageFont.truetype(path, config[CONF_SIZE])
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font = ImageFont.truetype(str(path), config[CONF_SIZE])
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except Exception as e:
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raise core.EsphomeError(f"Could not load truetype file {path}: {e}")
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