mirror of
https://github.com/explosion/spaCy.git
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dbd829f0ed
* Fix inconsistency in displaCy docs about page option The `page` option, which wraps the output SVG in HTML, is true by default for `serve` but not for `render`. The `render` docs were wrong though, so this updates them. * Update the same statement in more docs A few renderers used the same language
578 lines
23 KiB
Python
578 lines
23 KiB
Python
from typing import Any, Dict, List, Optional, Tuple, Union
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import uuid
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import itertools
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from ..errors import Errors
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from ..util import escape_html, minify_html, registry
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from .templates import TPL_DEP_ARCS, TPL_DEP_SVG, TPL_DEP_WORDS
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from .templates import TPL_DEP_WORDS_LEMMA, TPL_ENT, TPL_ENT_RTL, TPL_ENTS
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from .templates import TPL_FIGURE, TPL_KB_LINK, TPL_PAGE, TPL_SPAN
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from .templates import TPL_SPAN_RTL, TPL_SPAN_SLICE, TPL_SPAN_SLICE_RTL
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from .templates import TPL_SPAN_START, TPL_SPAN_START_RTL, TPL_SPANS
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from .templates import TPL_TITLE
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DEFAULT_LANG = "en"
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DEFAULT_DIR = "ltr"
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DEFAULT_ENTITY_COLOR = "#ddd"
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DEFAULT_LABEL_COLORS = {
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"ORG": "#7aecec",
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"PRODUCT": "#bfeeb7",
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"GPE": "#feca74",
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"LOC": "#ff9561",
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"PERSON": "#aa9cfc",
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"NORP": "#c887fb",
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"FAC": "#9cc9cc",
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"EVENT": "#ffeb80",
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"LAW": "#ff8197",
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"LANGUAGE": "#ff8197",
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"WORK_OF_ART": "#f0d0ff",
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"DATE": "#bfe1d9",
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"TIME": "#bfe1d9",
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"MONEY": "#e4e7d2",
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"QUANTITY": "#e4e7d2",
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"ORDINAL": "#e4e7d2",
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"CARDINAL": "#e4e7d2",
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"PERCENT": "#e4e7d2",
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}
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class SpanRenderer:
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"""Render Spans as SVGs."""
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style = "span"
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def __init__(self, options: Dict[str, Any] = {}) -> None:
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"""Initialise span renderer
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options (dict): Visualiser-specific options (colors, spans)
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"""
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# Set up the colors and overall look
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colors = dict(DEFAULT_LABEL_COLORS)
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user_colors = registry.displacy_colors.get_all()
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for user_color in user_colors.values():
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if callable(user_color):
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# Since this comes from the function registry, we want to make
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# sure we support functions that *return* a dict of colors
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user_color = user_color()
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if not isinstance(user_color, dict):
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raise ValueError(Errors.E925.format(obj=type(user_color)))
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colors.update(user_color)
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colors.update(options.get("colors", {}))
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self.default_color = DEFAULT_ENTITY_COLOR
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self.colors = {label.upper(): color for label, color in colors.items()}
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# Set up how the text and labels will be rendered
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self.direction = DEFAULT_DIR
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self.lang = DEFAULT_LANG
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# These values are in px
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self.top_offset = options.get("top_offset", 40)
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# This is how far under the top offset the span labels appear
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self.span_label_offset = options.get("span_label_offset", 20)
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self.offset_step = options.get("top_offset_step", 17)
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# Set up which templates will be used
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template = options.get("template")
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if template:
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self.span_template = template["span"]
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self.span_slice_template = template["slice"]
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self.span_start_template = template["start"]
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else:
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if self.direction == "rtl":
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self.span_template = TPL_SPAN_RTL
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self.span_slice_template = TPL_SPAN_SLICE_RTL
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self.span_start_template = TPL_SPAN_START_RTL
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else:
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self.span_template = TPL_SPAN
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self.span_slice_template = TPL_SPAN_SLICE
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self.span_start_template = TPL_SPAN_START
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def render(
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self, parsed: List[Dict[str, Any]], page: bool = False, minify: bool = False
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) -> str:
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"""Render complete markup.
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parsed (list): Dependency parses to render.
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page (bool): Render parses wrapped as full HTML page.
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minify (bool): Minify HTML markup.
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RETURNS (str): Rendered SVG or HTML markup.
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"""
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rendered = []
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for i, p in enumerate(parsed):
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if i == 0:
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settings = p.get("settings", {})
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self.direction = settings.get("direction", DEFAULT_DIR)
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self.lang = settings.get("lang", DEFAULT_LANG)
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rendered.append(self.render_spans(p["tokens"], p["spans"], p.get("title")))
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if page:
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docs = "".join([TPL_FIGURE.format(content=doc) for doc in rendered])
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markup = TPL_PAGE.format(content=docs, lang=self.lang, dir=self.direction)
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else:
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markup = "".join(rendered)
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if minify:
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return minify_html(markup)
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return markup
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def render_spans(
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self,
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tokens: List[str],
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spans: List[Dict[str, Any]],
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title: Optional[str],
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) -> str:
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"""Render span types in text.
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Spans are rendered per-token, this means that for each token, we check if it's part
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of a span slice (a member of a span type) or a span start (the starting token of a
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given span type).
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tokens (list): Individual tokens in the text
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spans (list): Individual entity spans and their start, end, label, kb_id and kb_url.
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title (str / None): Document title set in Doc.user_data['title'].
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"""
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per_token_info = []
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# we must sort so that we can correctly describe when spans need to "stack"
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# which is determined by their start token, then span length (longer spans on top),
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# then break any remaining ties with the span label
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spans = sorted(
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spans,
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key=lambda s: (
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s["start_token"],
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-(s["end_token"] - s["start_token"]),
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s["label"],
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),
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)
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for s in spans:
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# this is the vertical 'slot' that the span will be rendered in
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# vertical_position = span_label_offset + (offset_step * (slot - 1))
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s["render_slot"] = 0
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for idx, token in enumerate(tokens):
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# Identify if a token belongs to a Span (and which) and if it's a
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# start token of said Span. We'll use this for the final HTML render
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token_markup: Dict[str, Any] = {}
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token_markup["text"] = token
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concurrent_spans = 0
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entities = []
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for span in spans:
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ent = {}
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if span["start_token"] <= idx < span["end_token"]:
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concurrent_spans += 1
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span_start = idx == span["start_token"]
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ent["label"] = span["label"]
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ent["is_start"] = span_start
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if span_start:
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# When the span starts, we need to know how many other
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# spans are on the 'span stack' and will be rendered.
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# This value becomes the vertical render slot for this entire span
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span["render_slot"] = concurrent_spans
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ent["render_slot"] = span["render_slot"]
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kb_id = span.get("kb_id", "")
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kb_url = span.get("kb_url", "#")
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ent["kb_link"] = (
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TPL_KB_LINK.format(kb_id=kb_id, kb_url=kb_url) if kb_id else ""
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)
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entities.append(ent)
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else:
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# We don't specifically need to do this since we loop
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# over tokens and spans sorted by their start_token,
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# so we'll never use a span again after the last token it appears in,
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# but if we were to use these spans again we'd want to make sure
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# this value was reset correctly.
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span["render_slot"] = 0
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token_markup["entities"] = entities
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per_token_info.append(token_markup)
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markup = self._render_markup(per_token_info)
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markup = TPL_SPANS.format(content=markup, dir=self.direction)
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if title:
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markup = TPL_TITLE.format(title=title) + markup
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return markup
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def _render_markup(self, per_token_info: List[Dict[str, Any]]) -> str:
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"""Render the markup from per-token information"""
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markup = ""
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for token in per_token_info:
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entities = sorted(token["entities"], key=lambda d: d["render_slot"])
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# Whitespace tokens disrupt the vertical space (no line height) so that the
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# span indicators get misaligned. We don't render them as individual
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# tokens anyway, so we'll just not display a span indicator either.
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is_whitespace = token["text"].strip() == ""
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if entities and not is_whitespace:
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slices = self._get_span_slices(token["entities"])
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starts = self._get_span_starts(token["entities"])
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total_height = (
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self.top_offset
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+ self.span_label_offset
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+ (self.offset_step * (len(entities) - 1))
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)
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markup += self.span_template.format(
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text=token["text"],
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span_slices=slices,
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span_starts=starts,
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total_height=total_height,
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)
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else:
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markup += escape_html(token["text"] + " ")
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return markup
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def _get_span_slices(self, entities: List[Dict]) -> str:
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"""Get the rendered markup of all Span slices"""
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span_slices = []
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for entity in entities:
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# rather than iterate over multiples of offset_step, we use entity['render_slot']
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# to determine the vertical position, since that tells where
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# the span starts vertically so we can extend it horizontally,
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# past other spans that might have already ended
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color = self.colors.get(entity["label"].upper(), self.default_color)
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top_offset = self.top_offset + (
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self.offset_step * (entity["render_slot"] - 1)
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)
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span_slice = self.span_slice_template.format(
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bg=color,
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top_offset=top_offset,
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)
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span_slices.append(span_slice)
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return "".join(span_slices)
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def _get_span_starts(self, entities: List[Dict]) -> str:
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"""Get the rendered markup of all Span start tokens"""
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span_starts = []
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for entity in entities:
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color = self.colors.get(entity["label"].upper(), self.default_color)
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top_offset = self.top_offset + (
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self.offset_step * (entity["render_slot"] - 1)
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)
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span_start = (
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self.span_start_template.format(
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bg=color,
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top_offset=top_offset,
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label=entity["label"],
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kb_link=entity["kb_link"],
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)
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if entity["is_start"]
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else ""
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)
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span_starts.append(span_start)
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return "".join(span_starts)
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class DependencyRenderer:
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"""Render dependency parses as SVGs."""
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style = "dep"
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def __init__(self, options: Dict[str, Any] = {}) -> None:
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"""Initialise dependency renderer.
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options (dict): Visualiser-specific options (compact, word_spacing,
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arrow_spacing, arrow_width, arrow_stroke, distance, offset_x,
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color, bg, font)
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"""
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self.compact = options.get("compact", False)
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self.word_spacing = options.get("word_spacing", 45)
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self.arrow_spacing = options.get("arrow_spacing", 12 if self.compact else 20)
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self.arrow_width = options.get("arrow_width", 6 if self.compact else 10)
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self.arrow_stroke = options.get("arrow_stroke", 2)
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self.distance = options.get("distance", 150 if self.compact else 175)
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self.offset_x = options.get("offset_x", 50)
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self.color = options.get("color", "#000000")
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self.bg = options.get("bg", "#ffffff")
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self.font = options.get("font", "Arial")
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self.direction = DEFAULT_DIR
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self.lang = DEFAULT_LANG
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def render(
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self, parsed: List[Dict[str, Any]], page: bool = False, minify: bool = False
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) -> str:
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"""Render complete markup.
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parsed (list): Dependency parses to render.
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page (bool): Render parses wrapped as full HTML page.
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minify (bool): Minify HTML markup.
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RETURNS (str): Rendered SVG or HTML markup.
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"""
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# Create a random ID prefix to make sure parses don't receive the
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# same ID, even if they're identical
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id_prefix = uuid.uuid4().hex
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rendered = []
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for i, p in enumerate(parsed):
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if i == 0:
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settings = p.get("settings", {})
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self.direction = settings.get("direction", DEFAULT_DIR)
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self.lang = settings.get("lang", DEFAULT_LANG)
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render_id = f"{id_prefix}-{i}"
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svg = self.render_svg(render_id, p["words"], p["arcs"])
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rendered.append(svg)
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if page:
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content = "".join([TPL_FIGURE.format(content=svg) for svg in rendered])
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markup = TPL_PAGE.format(
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content=content, lang=self.lang, dir=self.direction
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)
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else:
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markup = "".join(rendered)
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if minify:
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return minify_html(markup)
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return markup
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def render_svg(
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self,
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render_id: Union[int, str],
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words: List[Dict[str, Any]],
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arcs: List[Dict[str, Any]],
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) -> str:
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"""Render SVG.
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render_id (Union[int, str]): Unique ID, typically index of document.
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words (list): Individual words and their tags.
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arcs (list): Individual arcs and their start, end, direction and label.
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RETURNS (str): Rendered SVG markup.
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"""
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self.levels = self.get_levels(arcs)
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self.highest_level = max(self.levels.values(), default=0)
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self.offset_y = self.distance / 2 * self.highest_level + self.arrow_stroke
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self.width = self.offset_x + len(words) * self.distance
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self.height = self.offset_y + 3 * self.word_spacing
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self.id = render_id
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words_svg = [
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self.render_word(w["text"], w["tag"], w.get("lemma", None), i)
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for i, w in enumerate(words)
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]
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arcs_svg = [
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self.render_arrow(a["label"], a["start"], a["end"], a["dir"], i)
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for i, a in enumerate(arcs)
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]
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content = "".join(words_svg) + "".join(arcs_svg)
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return TPL_DEP_SVG.format(
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id=self.id,
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width=self.width,
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height=self.height,
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color=self.color,
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bg=self.bg,
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font=self.font,
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content=content,
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dir=self.direction,
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lang=self.lang,
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)
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def render_word(self, text: str, tag: str, lemma: str, i: int) -> str:
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"""Render individual word.
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text (str): Word text.
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tag (str): Part-of-speech tag.
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i (int): Unique ID, typically word index.
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RETURNS (str): Rendered SVG markup.
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"""
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y = self.offset_y + self.word_spacing
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x = self.offset_x + i * self.distance
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if self.direction == "rtl":
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x = self.width - x
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html_text = escape_html(text)
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if lemma is not None:
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return TPL_DEP_WORDS_LEMMA.format(
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text=html_text, tag=tag, lemma=lemma, x=x, y=y
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)
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return TPL_DEP_WORDS.format(text=html_text, tag=tag, x=x, y=y)
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def render_arrow(
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self, label: str, start: int, end: int, direction: str, i: int
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) -> str:
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"""Render individual arrow.
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label (str): Dependency label.
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start (int): Index of start word.
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end (int): Index of end word.
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direction (str): Arrow direction, 'left' or 'right'.
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i (int): Unique ID, typically arrow index.
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RETURNS (str): Rendered SVG markup.
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"""
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if start < 0 or end < 0:
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error_args = dict(start=start, end=end, label=label, dir=direction)
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raise ValueError(Errors.E157.format(**error_args))
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level = self.levels[(start, end, label)]
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x_start = self.offset_x + start * self.distance + self.arrow_spacing
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if self.direction == "rtl":
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x_start = self.width - x_start
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y = self.offset_y
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x_end = (
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self.offset_x
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+ (end - start) * self.distance
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+ start * self.distance
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- self.arrow_spacing * (self.highest_level - level) / 4
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)
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if self.direction == "rtl":
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x_end = self.width - x_end
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y_curve = self.offset_y - level * self.distance / 2
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if self.compact:
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y_curve = self.offset_y - level * self.distance / 6
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if y_curve == 0 and max(self.levels.values(), default=0) > 5:
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y_curve = -self.distance
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arrowhead = self.get_arrowhead(direction, x_start, y, x_end)
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arc = self.get_arc(x_start, y, y_curve, x_end)
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label_side = "right" if self.direction == "rtl" else "left"
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return TPL_DEP_ARCS.format(
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id=self.id,
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i=i,
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stroke=self.arrow_stroke,
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head=arrowhead,
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label=label,
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label_side=label_side,
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arc=arc,
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)
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def get_arc(self, x_start: int, y: int, y_curve: int, x_end: int) -> str:
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"""Render individual arc.
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x_start (int): X-coordinate of arrow start point.
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y (int): Y-coordinate of arrow start and end point.
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y_curve (int): Y-corrdinate of Cubic Bézier y_curve point.
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x_end (int): X-coordinate of arrow end point.
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RETURNS (str): Definition of the arc path ('d' attribute).
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"""
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template = "M{x},{y} C{x},{c} {e},{c} {e},{y}"
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if self.compact:
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template = "M{x},{y} {x},{c} {e},{c} {e},{y}"
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return template.format(x=x_start, y=y, c=y_curve, e=x_end)
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def get_arrowhead(self, direction: str, x: int, y: int, end: int) -> str:
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"""Render individual arrow head.
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direction (str): Arrow direction, 'left' or 'right'.
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x (int): X-coordinate of arrow start point.
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y (int): Y-coordinate of arrow start and end point.
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end (int): X-coordinate of arrow end point.
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RETURNS (str): Definition of the arrow head path ('d' attribute).
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"""
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if direction == "left":
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p1, p2, p3 = (x, x - self.arrow_width + 2, x + self.arrow_width - 2)
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else:
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p1, p2, p3 = (end, end + self.arrow_width - 2, end - self.arrow_width + 2)
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return f"M{p1},{y + 2} L{p2},{y - self.arrow_width} {p3},{y - self.arrow_width}"
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def get_levels(self, arcs: List[Dict[str, Any]]) -> Dict[Tuple[int, int, str], int]:
|
|
"""Calculate available arc height "levels".
|
|
Used to calculate arrow heights dynamically and without wasting space.
|
|
|
|
args (list): Individual arcs and their start, end, direction and label.
|
|
RETURNS (dict): Arc levels keyed by (start, end, label).
|
|
"""
|
|
arcs = [dict(t) for t in {tuple(sorted(arc.items())) for arc in arcs}]
|
|
length = max([arc["end"] for arc in arcs], default=0)
|
|
max_level = [0] * length
|
|
levels = {}
|
|
for arc in sorted(arcs, key=lambda arc: arc["end"] - arc["start"]):
|
|
level = max(max_level[arc["start"] : arc["end"]]) + 1
|
|
for i in range(arc["start"], arc["end"]):
|
|
max_level[i] = level
|
|
levels[(arc["start"], arc["end"], arc["label"])] = level
|
|
return levels
|
|
|
|
|
|
class EntityRenderer:
|
|
"""Render named entities as HTML."""
|
|
|
|
style = "ent"
|
|
|
|
def __init__(self, options: Dict[str, Any] = {}) -> None:
|
|
"""Initialise entity renderer.
|
|
|
|
options (dict): Visualiser-specific options (colors, ents)
|
|
"""
|
|
colors = dict(DEFAULT_LABEL_COLORS)
|
|
user_colors = registry.displacy_colors.get_all()
|
|
for user_color in user_colors.values():
|
|
if callable(user_color):
|
|
# Since this comes from the function registry, we want to make
|
|
# sure we support functions that *return* a dict of colors
|
|
user_color = user_color()
|
|
if not isinstance(user_color, dict):
|
|
raise ValueError(Errors.E925.format(obj=type(user_color)))
|
|
colors.update(user_color)
|
|
colors.update(options.get("colors", {}))
|
|
self.default_color = DEFAULT_ENTITY_COLOR
|
|
self.colors = {label.upper(): color for label, color in colors.items()}
|
|
self.ents = options.get("ents", None)
|
|
if self.ents is not None:
|
|
self.ents = [ent.upper() for ent in self.ents]
|
|
self.direction = DEFAULT_DIR
|
|
self.lang = DEFAULT_LANG
|
|
template = options.get("template")
|
|
if template:
|
|
self.ent_template = template
|
|
else:
|
|
if self.direction == "rtl":
|
|
self.ent_template = TPL_ENT_RTL
|
|
else:
|
|
self.ent_template = TPL_ENT
|
|
|
|
def render(
|
|
self, parsed: List[Dict[str, Any]], page: bool = False, minify: bool = False
|
|
) -> str:
|
|
"""Render complete markup.
|
|
|
|
parsed (list): Dependency parses to render.
|
|
page (bool): Render parses wrapped as full HTML page.
|
|
minify (bool): Minify HTML markup.
|
|
RETURNS (str): Rendered SVG or HTML markup.
|
|
"""
|
|
rendered = []
|
|
for i, p in enumerate(parsed):
|
|
if i == 0:
|
|
settings = p.get("settings", {})
|
|
self.direction = settings.get("direction", DEFAULT_DIR)
|
|
self.lang = settings.get("lang", DEFAULT_LANG)
|
|
rendered.append(self.render_ents(p["text"], p["ents"], p.get("title")))
|
|
if page:
|
|
docs = "".join([TPL_FIGURE.format(content=doc) for doc in rendered])
|
|
markup = TPL_PAGE.format(content=docs, lang=self.lang, dir=self.direction)
|
|
else:
|
|
markup = "".join(rendered)
|
|
if minify:
|
|
return minify_html(markup)
|
|
return markup
|
|
|
|
def render_ents(
|
|
self, text: str, spans: List[Dict[str, Any]], title: Optional[str]
|
|
) -> str:
|
|
"""Render entities in text.
|
|
|
|
text (str): Original text.
|
|
spans (list): Individual entity spans and their start, end, label, kb_id and kb_url.
|
|
title (str / None): Document title set in Doc.user_data['title'].
|
|
"""
|
|
markup = ""
|
|
offset = 0
|
|
for span in spans:
|
|
label = span["label"]
|
|
start = span["start"]
|
|
end = span["end"]
|
|
kb_id = span.get("kb_id", "")
|
|
kb_url = span.get("kb_url", "#")
|
|
kb_link = TPL_KB_LINK.format(kb_id=kb_id, kb_url=kb_url) if kb_id else ""
|
|
additional_params = span.get("params", {})
|
|
entity = escape_html(text[start:end])
|
|
fragments = text[offset:start].split("\n")
|
|
for i, fragment in enumerate(fragments):
|
|
markup += escape_html(fragment)
|
|
if len(fragments) > 1 and i != len(fragments) - 1:
|
|
markup += "</br>"
|
|
if self.ents is None or label.upper() in self.ents:
|
|
color = self.colors.get(label.upper(), self.default_color)
|
|
ent_settings = {
|
|
"label": label,
|
|
"text": entity,
|
|
"bg": color,
|
|
"kb_link": kb_link,
|
|
}
|
|
ent_settings.update(additional_params)
|
|
markup += self.ent_template.format(**ent_settings)
|
|
else:
|
|
markup += entity
|
|
offset = end
|
|
fragments = text[offset:].split("\n")
|
|
for i, fragment in enumerate(fragments):
|
|
markup += escape_html(fragment)
|
|
if len(fragments) > 1 and i != len(fragments) - 1:
|
|
markup += "</br>"
|
|
markup = TPL_ENTS.format(content=markup, dir=self.direction)
|
|
if title:
|
|
markup = TPL_TITLE.format(title=title) + markup
|
|
return markup
|