mirror of
https://gitlab.com/MisterBiggs/aero-astro-calc.git
synced 2025-06-16 07:06:42 +00:00
88 lines
2.7 KiB
Python
88 lines
2.7 KiB
Python
from bokeh.util.compiler import TypeScript
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from bokeh.models import Label
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TS_CODE = """
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import * as p from "core/properties"
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import {Label, LabelView} from "models/annotations/label"
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declare const katex: any
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export class LatexLabelView extends LabelView {
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model: LatexLabel
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render(): void {
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//--- Start of copied section from ``Label.render`` implementation
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// Here because AngleSpec does units tranform and label doesn't support specs
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let angle: number
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switch (this.model.angle_units) {
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case "rad": {
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angle = -this.model.angle
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break
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}
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case "deg": {
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angle = (-this.model.angle * Math.PI) / 180.0
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break
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}
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default:
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throw new Error("unreachable code")
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}
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const panel = this.panel != null ? this.panel : this.plot_view.frame
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const xscale = this.plot_view.frame.xscales[this.model.x_range_name]
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const yscale = this.plot_view.frame.yscales[this.model.y_range_name]
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let sx = this.model.x_units == "data" ? xscale.compute(this.model.x) : panel.xview.compute(this.model.x)
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let sy = this.model.y_units == "data" ? yscale.compute(this.model.y) : panel.yview.compute(this.model.y)
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sx += this.model.x_offset
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sy -= this.model.y_offset
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//--- End of copied section from ``Label.render`` implementation
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// Must render as superpositioned div (not on canvas) so that KaTex
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// css can properly style the text
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this._css_text(this.plot_view.canvas_view.ctx, "", sx, sy, angle)
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// ``katex`` is loaded into the global window at runtime
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// katex.renderToString returns a html ``span`` element
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katex.render(this.model.text, this.el, {displayMode: true})
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}
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}
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export namespace LatexLabel {
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export type Attrs = p.AttrsOf<Props>
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export type Props = Label.Props
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}
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export interface LatexLabel extends LatexLabel.Attrs {}
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export class LatexLabel extends Label {
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properties: LatexLabel.Props
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constructor(attrs?: Partial<LatexLabel.Attrs>) {
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super(attrs)
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}
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static init_LatexLabel() {
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this.prototype.default_view = LatexLabelView
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}
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}
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"""
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class LatexLabel(Label):
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"""A subclass of the Bokeh built-in `Label` that supports rendering
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LaTex using the KaTex typesetting library.
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Only the render method of LabelView is overloaded to perform the
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text -> latex (via katex) conversion. Note: ``render_mode="canvas``
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isn't supported and certain DOM manipulation happens in the Label
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superclass implementation that requires explicitly setting
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`render_mode='css'`).
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"""
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__javascript__ = ["https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.6.0/katex.min.js"]
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__css__ = ["https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.6.0/katex.min.css"]
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__implementation__ = TypeScript(TS_CODE)
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