576 lines
21 KiB
Python
576 lines
21 KiB
Python
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# Copyright (c) 2016-2024 Martin Donath <martin.donath@squidfunk.com>
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to
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# deal in the Software without restriction, including without limitation the
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# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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# sell copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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# -----------------------------------------------------------------------------
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# Disclaimer
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# -----------------------------------------------------------------------------
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# Please note: this version of the social plugin is not actively development
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# anymore. Instead, Material for MkDocs Insiders ships a complete rewrite of
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# the plugin which is much more powerful and addresses all shortcomings of
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# this implementation. Additionally, the new social plugin allows to create
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# entirely custom social cards. You can probably imagine, that this was a lot
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# of work to pull off. If you run into problems, or want to have additional
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# functionality, please consider sponsoring the project. You can then use the
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# new version of the plugin immediately.
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# -----------------------------------------------------------------------------
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import concurrent.futures
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import functools
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import logging
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import os
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import posixpath
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import re
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import requests
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import sys
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from collections import defaultdict
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from hashlib import md5
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from io import BytesIO
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from mkdocs.commands.build import DuplicateFilter
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from mkdocs.exceptions import PluginError
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from mkdocs.plugins import BasePlugin
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from mkdocs.utils import write_file
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from shutil import copyfile
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from tempfile import NamedTemporaryFile
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from .config import SocialConfig
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try:
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from PIL import Image, ImageDraw, ImageFont
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except ImportError as e:
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import_errors = {repr(e)}
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else:
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import_errors = set()
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cairosvg_error: str = ""
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try:
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from cairosvg import svg2png
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except ImportError as e:
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import_errors.add(repr(e))
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except OSError as e:
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cairosvg_error = str(e)
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# -----------------------------------------------------------------------------
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# Classes
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# -----------------------------------------------------------------------------
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# Social plugin
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class SocialPlugin(BasePlugin[SocialConfig]):
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def __init__(self):
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self._executor = concurrent.futures.ThreadPoolExecutor(4)
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# Retrieve configuration
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def on_config(self, config):
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self.color = colors.get("indigo")
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self.config.cards = self.config.enabled
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if not self.config.cards:
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return
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# Check dependencies
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if import_errors:
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raise PluginError(
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"Required dependencies of \"social\" plugin not found:\n"
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+ str("\n".join(map(lambda x: "- " + x, import_errors)))
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+ "\n\n--> Install with: pip install \"mkdocs-material[imaging]\""
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)
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if cairosvg_error:
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raise PluginError(
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"\"cairosvg\" Python module is installed, but it crashed with:\n"
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+ cairosvg_error
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+ "\n\n--> Check out the troubleshooting guide: https://t.ly/MfX6u"
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)
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# Move color options
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if self.config.cards_color:
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# Move background color to new option
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value = self.config.cards_color.get("fill")
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if value:
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self.config.cards_layout_options["background_color"] = value
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# Move color to new option
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value = self.config.cards_color.get("text")
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if value:
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self.config.cards_layout_options["color"] = value
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# Move font family to new option
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if self.config.cards_font:
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value = self.config.cards_font
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self.config.cards_layout_options["font_family"] = value
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# Check if site URL is defined
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if not config.site_url:
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log.warning(
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"The \"site_url\" option is not set. The cards are generated, "
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"but not linked, so they won't be visible on social media."
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)
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# Ensure presence of cache directory
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self.cache = self.config.cache_dir
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if not os.path.isdir(self.cache):
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os.makedirs(self.cache)
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# Retrieve palette from theme configuration
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theme = config.theme
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if "palette" in theme:
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palette = theme["palette"]
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# Find first palette that includes primary color definition
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if isinstance(palette, list):
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for p in palette:
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if "primary" in p and p["primary"]:
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palette = p
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break
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# Set colors according to palette
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if "primary" in palette and palette["primary"]:
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primary = palette["primary"].replace(" ", "-")
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self.color = colors.get(primary, self.color)
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# Retrieve color overrides
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options = self.config.cards_layout_options
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self.color = {
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"fill": options.get("background_color", self.color["fill"]),
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"text": options.get("color", self.color["text"])
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}
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# Retrieve logo and font
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self._resized_logo_promise = self._executor.submit(self._load_resized_logo, config)
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self.font = self._load_font(config)
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self._image_promises = []
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# Create social cards
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def on_page_markdown(self, markdown, page, config, files):
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if not self.config.cards:
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return
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# Resolve image directory
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directory = self.config.cards_dir
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file, _ = os.path.splitext(page.file.src_path)
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# Resolve path of image
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path = "{}.png".format(os.path.join(
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config.site_dir,
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directory,
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file
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))
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# Resolve path of image directory
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directory = os.path.dirname(path)
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if not os.path.isdir(directory):
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os.makedirs(directory)
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# Compute site name
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site_name = config.site_name
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# Compute page title and description
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title = page.meta.get("title", page.title)
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description = config.site_description or ""
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if "description" in page.meta:
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description = page.meta["description"]
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# Check type of meta title - see https://t.ly/m1Us
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if not isinstance(title, str):
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log.error(
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f"Page meta title of page '{page.file.src_uri}' must be a "
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f"string, but is of type \"{type(title)}\"."
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)
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sys.exit(1)
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# Check type of meta description - see https://t.ly/m1Us
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if not isinstance(description, str):
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log.error(
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f"Page meta description of '{page.file.src_uri}' must be a "
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f"string, but is of type \"{type(description)}\"."
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)
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sys.exit(1)
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# Generate social card if not in cache
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hash = md5("".join([
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site_name,
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str(title),
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description
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]).encode("utf-8"))
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file = os.path.join(self.cache, f"{hash.hexdigest()}.png")
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self._image_promises.append(self._executor.submit(
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self._cache_image,
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cache_path = file, dest_path = path,
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render_function = lambda: self._render_card(site_name, title, description)
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))
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# Inject meta tags into page
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meta = page.meta.get("meta", [])
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page.meta["meta"] = meta + self._generate_meta(page, config)
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def on_post_build(self, config):
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if not self.config.cards:
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return
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# Check for exceptions
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for promise in self._image_promises:
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promise.result()
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# -------------------------------------------------------------------------
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# Render image to cache (if not present), then copy from cache to site
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def _cache_image(self, cache_path, dest_path, render_function):
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if not os.path.isfile(cache_path):
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image = render_function()
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image.save(cache_path)
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# Copy file from cache
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copyfile(cache_path, dest_path)
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@functools.lru_cache(maxsize=None)
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def _get_font(self, kind, size):
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return ImageFont.truetype(self.font[kind], size)
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# Render social card
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def _render_card(self, site_name, title, description):
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# Render background and logo
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image = self._render_card_background((1200, 630), self.color["fill"])
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image.alpha_composite(
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self._resized_logo_promise.result(),
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(1200 - 228, 64 - 4)
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)
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# Render site name
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font = self._get_font("Bold", 36)
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image.alpha_composite(
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self._render_text((826, 48), font, site_name, 1, 20),
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(64 + 4, 64)
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)
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# Render page title
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font = self._get_font("Bold", 92)
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image.alpha_composite(
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self._render_text((826, 328), font, title, 3, 30),
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(64, 160)
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)
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# Render page description
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font = self._get_font("Regular", 28)
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image.alpha_composite(
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self._render_text((826, 80), font, description, 2, 14),
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(64 + 4, 512)
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)
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# Return social card image
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return image
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# Render social card background
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def _render_card_background(self, size, fill):
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return Image.new(mode = "RGBA", size = size, color = fill)
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@functools.lru_cache(maxsize=None)
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def _tmp_context(self):
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image = Image.new(mode = "RGBA", size = (50, 50))
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return ImageDraw.Draw(image)
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@functools.lru_cache(maxsize=None)
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def _text_bounding_box(self, text, font):
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return self._tmp_context().textbbox((0, 0), text, font = font)
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# Render social card text
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def _render_text(self, size, font, text, lmax, spacing = 0):
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width = size[0]
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lines, words = [], []
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# Remove remnant HTML tags
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text = re.sub(r"(<[^>]+>)", "", text)
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# Retrieve y-offset of textbox to correct for spacing
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yoffset = 0
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# Create drawing context and split text into lines
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for word in text.split(" "):
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combine = " ".join(words + [word])
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textbox = self._text_bounding_box(combine, font = font)
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yoffset = textbox[1]
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if not words or textbox[2] <= width:
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words.append(word)
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else:
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lines.append(words)
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words = [word]
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# Join words for each line and create image
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lines.append(words)
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lines = [" ".join(line) for line in lines]
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image = Image.new(mode = "RGBA", size = size)
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# Create drawing context and split text into lines
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context = ImageDraw.Draw(image)
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context.text(
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(0, spacing / 2 - yoffset), "\n".join(lines[:lmax]),
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font = font, fill = self.color["text"], spacing = spacing - yoffset
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)
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# Return text image
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return image
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# -------------------------------------------------------------------------
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# Generate meta tags
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def _generate_meta(self, page, config):
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directory = self.config.cards_dir
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file, _ = os.path.splitext(page.file.src_uri)
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# Compute page title
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title = page.meta.get("title", page.title)
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if not page.is_homepage:
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title = f"{title} - {config.site_name}"
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# Compute page description
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description = config.site_description
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if "description" in page.meta:
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description = page.meta["description"]
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# Resolve image URL
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url = "{}.png".format(posixpath.join(
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config.site_url or ".",
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directory,
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file
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))
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# Ensure forward slashes
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url = url.replace(os.path.sep, "/")
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# Return meta tags
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return [
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# Meta tags for Open Graph
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{ "property": "og:type", "content": "website" },
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{ "property": "og:title", "content": title },
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{ "property": "og:description", "content": description },
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{ "property": "og:image", "content": url },
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{ "property": "og:image:type", "content": "image/png" },
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{ "property": "og:image:width", "content": "1200" },
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{ "property": "og:image:height", "content": "630" },
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{ "property": "og:url", "content": page.canonical_url },
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# Meta tags for Twitter
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{ "name": "twitter:card", "content": "summary_large_image" },
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# { "name": "twitter:site", "content": user },
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# { "name": "twitter:creator", "content": user },
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{ "name": "twitter:title", "content": title },
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{ "name": "twitter:description", "content": description },
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{ "name": "twitter:image", "content": url }
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]
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def _load_resized_logo(self, config, width = 144):
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||
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|
logo = self._load_logo(config)
|
||
|
|
height = int(width * logo.height / logo.width)
|
||
|
|
return logo.resize((width, height))
|
||
|
|
|
||
|
|
# Retrieve logo image or icon
|
||
|
|
def _load_logo(self, config):
|
||
|
|
theme = config.theme
|
||
|
|
|
||
|
|
# Handle images (precedence over icons)
|
||
|
|
if "logo" in theme:
|
||
|
|
_, extension = os.path.splitext(theme["logo"])
|
||
|
|
|
||
|
|
path = os.path.join(config.docs_dir, theme["logo"])
|
||
|
|
|
||
|
|
# Allow users to put the logo inside their custom_dir (theme["logo"] case)
|
||
|
|
if theme.custom_dir:
|
||
|
|
custom_dir_logo = os.path.join(theme.custom_dir, theme["logo"])
|
||
|
|
if os.path.exists(custom_dir_logo):
|
||
|
|
path = custom_dir_logo
|
||
|
|
|
||
|
|
# Load SVG and convert to PNG
|
||
|
|
if extension == ".svg":
|
||
|
|
return self._load_logo_svg(path)
|
||
|
|
|
||
|
|
# Load PNG, JPEG, etc.
|
||
|
|
return Image.open(path).convert("RGBA")
|
||
|
|
|
||
|
|
# Handle icons
|
||
|
|
icon = theme.get("icon") or {}
|
||
|
|
if "logo" in icon and icon["logo"]:
|
||
|
|
logo = icon["logo"]
|
||
|
|
else:
|
||
|
|
logo = "material/library"
|
||
|
|
|
||
|
|
# Resolve path of package
|
||
|
|
base = os.path.abspath(os.path.join(
|
||
|
|
os.path.dirname(__file__),
|
||
|
|
"../.."
|
||
|
|
))
|
||
|
|
|
||
|
|
path = f"{base}/templates/.icons/{logo}.svg"
|
||
|
|
|
||
|
|
# Allow users to put the logo inside their custom_dir (theme["icon"]["logo"] case)
|
||
|
|
if theme.custom_dir:
|
||
|
|
custom_dir_logo = os.path.join(theme.custom_dir, ".icons", f"{logo}.svg")
|
||
|
|
if os.path.exists(custom_dir_logo):
|
||
|
|
path = custom_dir_logo
|
||
|
|
|
||
|
|
# Load icon data and fill with color
|
||
|
|
return self._load_logo_svg(path, self.color["text"])
|
||
|
|
|
||
|
|
# Load SVG file and convert to PNG
|
||
|
|
def _load_logo_svg(self, path, fill = None):
|
||
|
|
file = BytesIO()
|
||
|
|
data = open(path).read()
|
||
|
|
|
||
|
|
# Fill with color, if given
|
||
|
|
if fill:
|
||
|
|
data = data.replace("<svg", f"<svg fill=\"{fill}\"")
|
||
|
|
|
||
|
|
# Convert to PNG and return image
|
||
|
|
svg2png(bytestring = data, write_to = file, scale = 10)
|
||
|
|
return Image.open(file)
|
||
|
|
|
||
|
|
# Retrieve font either from the card layout option or from the Material
|
||
|
|
# font defintion. If no font is defined for Material or font is False
|
||
|
|
# then choose a default.
|
||
|
|
def _load_font(self, config):
|
||
|
|
name = self.config.cards_layout_options.get("font_family")
|
||
|
|
if not name:
|
||
|
|
material_name = config.theme.get("font", False)
|
||
|
|
if material_name is False:
|
||
|
|
name = "Roboto"
|
||
|
|
else:
|
||
|
|
name = material_name.get("text", "Roboto")
|
||
|
|
|
||
|
|
# Resolve relevant fonts
|
||
|
|
font = {}
|
||
|
|
for style in ["Regular", "Bold"]:
|
||
|
|
font[style] = self._resolve_font(name, style)
|
||
|
|
|
||
|
|
# Return available font weights with fallback
|
||
|
|
return defaultdict(lambda: font["Regular"], font)
|
||
|
|
|
||
|
|
# Resolve font family with specific style - if we haven't already done it,
|
||
|
|
# the font family is first downloaded from Google Fonts and the styles are
|
||
|
|
# saved to the cache directory. If the font cannot be resolved, the plugin
|
||
|
|
# must abort with an error.
|
||
|
|
def _resolve_font(self, family: str, style: str):
|
||
|
|
path = os.path.join(self.config.cache_dir, "fonts", family)
|
||
|
|
|
||
|
|
# Fetch font family, if it hasn't been fetched yet
|
||
|
|
if not os.path.isdir(path):
|
||
|
|
self._fetch_font_from_google_fonts(family)
|
||
|
|
|
||
|
|
# Check for availability of font style
|
||
|
|
list = sorted(os.listdir(path))
|
||
|
|
for file in list:
|
||
|
|
name, _ = os.path.splitext(file)
|
||
|
|
if name == style:
|
||
|
|
return os.path.join(path, file)
|
||
|
|
|
||
|
|
# Find regular variant of font family - we cannot rely on the fact that
|
||
|
|
# fonts always have a single regular variant - some of them have several
|
||
|
|
# of them, potentially prefixed with "Condensed" etc. For this reason we
|
||
|
|
# use the first font we find if we find no regular one.
|
||
|
|
fallback = ""
|
||
|
|
for file in list:
|
||
|
|
name, _ = os.path.splitext(file)
|
||
|
|
|
||
|
|
# 1. Fallback: use first font
|
||
|
|
if not fallback:
|
||
|
|
fallback = name
|
||
|
|
|
||
|
|
# 2. Fallback: use regular font - use the shortest one, i.e., prefer
|
||
|
|
# "10pt Regular" over "10pt Condensed Regular". This is a heuristic.
|
||
|
|
if "Regular" in name:
|
||
|
|
if not fallback or len(name) < len(fallback):
|
||
|
|
fallback = name
|
||
|
|
|
||
|
|
# Fall back to regular font (guess if there are multiple)
|
||
|
|
return self._resolve_font(family, fallback)
|
||
|
|
|
||
|
|
# Fetch font family from Google Fonts
|
||
|
|
def _fetch_font_from_google_fonts(self, family: str):
|
||
|
|
path = os.path.join(self.config.cache_dir, "fonts")
|
||
|
|
|
||
|
|
# Download manifest from Google Fonts - Google returns JSON with syntax
|
||
|
|
# errors, so we just treat the response as plain text and parse out all
|
||
|
|
# URLs to font files, as we're going to rename them anyway. This should
|
||
|
|
# be more resilient than trying to correct the JSON syntax.
|
||
|
|
url = f"https://fonts.google.com/download/list?family={family}"
|
||
|
|
res = requests.get(url)
|
||
|
|
|
||
|
|
# Ensure that the download succeeded
|
||
|
|
if res.status_code != 200:
|
||
|
|
raise PluginError(
|
||
|
|
f"Couldn't find font family '{family}' on Google Fonts "
|
||
|
|
f"({res.status_code}: {res.reason})"
|
||
|
|
)
|
||
|
|
|
||
|
|
# Extract font URLs from manifest
|
||
|
|
for match in re.findall(
|
||
|
|
r"\"(https:(?:.*?)\.[ot]tf)\"", str(res.content)
|
||
|
|
):
|
||
|
|
with requests.get(match) as res:
|
||
|
|
res.raise_for_status()
|
||
|
|
|
||
|
|
# Extract font family name and style using the content in the
|
||
|
|
# response via ByteIO to avoid writing a temp file. Done to fix
|
||
|
|
# problems with passing a NamedTemporaryFile to
|
||
|
|
# ImageFont.truetype() on Windows, see https://t.ly/LiF_k
|
||
|
|
with BytesIO(res.content) as fontdata:
|
||
|
|
font = ImageFont.truetype(fontdata)
|
||
|
|
name, style = font.getname()
|
||
|
|
name = " ".join([name.replace(family, ""), style]).strip()
|
||
|
|
target = os.path.join(path, family, f"{name}.ttf")
|
||
|
|
|
||
|
|
# write file to cache
|
||
|
|
write_file(res.content, target)
|
||
|
|
|
||
|
|
# -----------------------------------------------------------------------------
|
||
|
|
# Data
|
||
|
|
# -----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
# Set up logging
|
||
|
|
log = logging.getLogger("mkdocs")
|
||
|
|
log.addFilter(DuplicateFilter())
|
||
|
|
|
||
|
|
# Color palette
|
||
|
|
colors = {
|
||
|
|
"red": { "fill": "#ef5552", "text": "#ffffff" },
|
||
|
|
"pink": { "fill": "#e92063", "text": "#ffffff" },
|
||
|
|
"purple": { "fill": "#ab47bd", "text": "#ffffff" },
|
||
|
|
"deep-purple": { "fill": "#7e56c2", "text": "#ffffff" },
|
||
|
|
"indigo": { "fill": "#4051b5", "text": "#ffffff" },
|
||
|
|
"blue": { "fill": "#2094f3", "text": "#ffffff" },
|
||
|
|
"light-blue": { "fill": "#02a6f2", "text": "#ffffff" },
|
||
|
|
"cyan": { "fill": "#00bdd6", "text": "#ffffff" },
|
||
|
|
"teal": { "fill": "#009485", "text": "#ffffff" },
|
||
|
|
"green": { "fill": "#4cae4f", "text": "#ffffff" },
|
||
|
|
"light-green": { "fill": "#8bc34b", "text": "#ffffff" },
|
||
|
|
"lime": { "fill": "#cbdc38", "text": "#000000" },
|
||
|
|
"yellow": { "fill": "#ffec3d", "text": "#000000" },
|
||
|
|
"amber": { "fill": "#ffc105", "text": "#000000" },
|
||
|
|
"orange": { "fill": "#ffa724", "text": "#000000" },
|
||
|
|
"deep-orange": { "fill": "#ff6e42", "text": "#ffffff" },
|
||
|
|
"brown": { "fill": "#795649", "text": "#ffffff" },
|
||
|
|
"grey": { "fill": "#757575", "text": "#ffffff" },
|
||
|
|
"blue-grey": { "fill": "#546d78", "text": "#ffffff" },
|
||
|
|
"black": { "fill": "#000000", "text": "#ffffff" },
|
||
|
|
"white": { "fill": "#ffffff", "text": "#000000" }
|
||
|
|
}
|