MapComplete/Models/ThemeConfig/LineRenderingConfig.ts

import WithContextLoader from "./WithContextLoader"
import TagRenderingConfig from "./TagRenderingConfig"
import { Utils } from "../../Utils"
import LineRenderingConfigJson from "./Json/LineRenderingConfigJson"

export default class LineRenderingConfig extends WithContextLoader {
    public readonly color: TagRenderingConfig
    public readonly width: TagRenderingConfig
    public readonly dashArray: TagRenderingConfig
    public readonly lineCap: TagRenderingConfig
    public readonly offset: TagRenderingConfig
    public readonly fill: TagRenderingConfig
    public readonly fillColor: TagRenderingConfig
    public readonly leftRightSensitive: boolean

    constructor(json: LineRenderingConfigJson, context: string) {
        super(json, context)
        this.color = this.tr("color", "#0000ff")
        this.width = this.tr("width", "7")
        this.dashArray = this.tr("dashArray", "")
        this.lineCap = this.tr("lineCap", "round")
        this.fill = this.tr("fill", undefined)
        this.fillColor = this.tr("fillColor", undefined)

        if (typeof json.offset === "string") {
            json.offset = parseFloat(json.offset)
        }

        this.leftRightSensitive = json.offset !== undefined && json.offset !== 0

        this.offset = this.tr("offset", "0")
    }

    public GenerateLeafletStyle(tags: {}): {
        fillColor?: string
        color: string
        lineCap: string
        offset: number
        weight: number
        dashArray: string
        fill?: boolean
    } {
        function rendernum(tr: TagRenderingConfig, deflt: number) {
            const str = Number(render(tr, "" + deflt))
            const n = Number(str)
            if (isNaN(n)) {
                return deflt
            }
            return n
        }

        function render(tr: TagRenderingConfig, deflt?: string) {
            if (tags === undefined) {
                return deflt
            }
            if (tr === undefined) {
                return deflt
            }
            const str = tr?.GetRenderValue(tags)?.txt ?? deflt
            if (str === "") {
                return deflt
            }
            return Utils.SubstituteKeys(str, tags)?.replace(/{.*}/g, "")
        }

        const dashArray = render(this.dashArray)
        let color = render(this.color, "#00f")
        if (color.startsWith("--")) {
            color = getComputedStyle(document.body).getPropertyValue("--catch-detail-color")
        }

        const style = {
            color,
            dashArray,
            weight: rendernum(this.width, 5),
            lineCap: render(this.lineCap),
            offset: rendernum(this.offset, 0),
        }

        const fillStr = render(this.fill, undefined)
        if (fillStr !== undefined && fillStr !== "") {
            style["fill"] = fillStr === "yes" || fillStr === "true"
        }

        const fillColorStr = render(this.fillColor, undefined)
        if (fillColorStr !== undefined) {
            style["fillColor"] = fillColorStr
        }
        return style
    }
}