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`${k + (k ? \" \" : \"\") + dt.z} ${dt.x} ${dt.y}`,\n preparedTile.origin.x + 4,\n preparedTile.origin.y + 14 * (1 + idx),\n );\n }\n idx++;\n }\n ctx.restore();\n }\n\n // TODO this API isn't so elegant\n return {\n elapsed: performance.now() - start,\n project: instancedProject(origin, displayZoom),\n unproject: instancedUnproject(origin, displayZoom),\n };\n }\n\n async drawCanvas(\n canvas: HTMLCanvasElement,\n latlng: Point,\n displayZoom: number,\n options: StaticOptions = {},\n ) {\n const dpr = window.devicePixelRatio;\n const width = canvas.clientWidth;\n const height = canvas.clientHeight;\n if (!(canvas.width === width * dpr && canvas.height === height * dpr)) {\n canvas.width = width * dpr;\n canvas.height = height * dpr;\n }\n if (options.lang) canvas.lang = options.lang;\n const ctx = canvas.getContext(\"2d\");\n if (!ctx) {\n console.error(\"Failed to initialize canvas2d context.\");\n return;\n }\n ctx.setTransform(dpr, 0, 0, dpr, 0, 0);\n return this.drawContext(ctx, 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\"landuse\",\n symbolizer: new PolygonSymbolizer({\n fill: t.park_b,\n opacity: (z, f) => {\n if (z < 8) return 0;\n if (z === 8) return 0.5;\n return 1;\n },\n }),\n filter: (z, f) => {\n const kind = getString(f.props, \"kind\");\n return [\n \"national_park\",\n \"park\",\n \"cemetery\",\n \"protected_area\",\n \"nature_reserve\",\n \"forest\",\n \"golf_course\",\n ].includes(kind);\n },\n },\n {\n dataLayer: \"landuse\",\n symbolizer: new PolygonSymbolizer({\n fill: t.hospital,\n }),\n filter: (z, f) => {\n return f.props.kind === \"hospital\";\n },\n },\n {\n dataLayer: \"landuse\",\n symbolizer: new PolygonSymbolizer({\n fill: t.industrial,\n }),\n filter: (z, f) => {\n return f.props.kind === \"industrial\";\n },\n },\n {\n dataLayer: \"landuse\",\n symbolizer: new PolygonSymbolizer({\n fill: t.school,\n }),\n filter: (z, f) => {\n const kind = getString(f.props, \"kind\");\n return [\"school\", \"university\", \"college\"].includes(kind);\n },\n },\n {\n dataLayer: \"landuse\",\n symbolizer: new PolygonSymbolizer({\n fill: t.beach,\n }),\n filter: (z, f) => {\n return f.props.kind === \"beach\";\n },\n },\n {\n dataLayer: \"landuse\",\n symbolizer: new PolygonSymbolizer({\n fill: t.zoo,\n }),\n filter: (z, f) => {\n return f.props.kind === \"zoo\";\n },\n },\n {\n dataLayer: \"landuse\",\n symbolizer: new PolygonSymbolizer({\n fill: t.zoo,\n }),\n filter: (z, f) => {\n const kind = getString(f.props, \"kind\");\n return [\"military\", \"naval_base\", \"airfield\"].includes(kind);\n },\n },\n {\n dataLayer: \"landuse\",\n symbolizer: new PolygonSymbolizer({\n fill: (z, f) => {\n return mix(t.wood_a, t.wood_b, Math.min(Math.max(z / 12.0, 12), 0));\n },\n opacity: (z, f) => {\n if (z < 8) return 0;\n if (z === 8) return 0.5;\n return 1;\n },\n }),\n filter: (z, f) => {\n const kind = getString(f.props, \"kind\");\n return [\"wood\", \"nature_reserve\", \"forest\"].includes(kind);\n },\n },\n {\n dataLayer: \"landuse\",\n symbolizer: new 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f.props.kind_detail === \"pier\";\n },\n },\n {\n dataLayer: \"water\",\n minzoom: 14,\n symbolizer: new LineSymbolizer({\n color: t.water,\n width: (z, f) => {\n return exp(1.6, [\n [9, 0],\n [9.5, 1.0],\n [18, 12],\n ])(z);\n },\n }),\n filter: (z, f) => {\n return f.geomType === GeomType.Line && f.props.kind === \"river\";\n },\n },\n {\n dataLayer: \"water\",\n minzoom: 14,\n symbolizer: new LineSymbolizer({\n color: t.water,\n width: 0.5,\n }),\n filter: (z, f) => {\n return f.geomType === GeomType.Line && f.props.kind === \"stream\";\n },\n },\n {\n dataLayer: \"landuse\",\n symbolizer: new PolygonSymbolizer({\n fill: t.pedestrian,\n }),\n filter: (z, f) => {\n return f.props.kind === \"pedestrian\";\n },\n },\n {\n dataLayer: \"landuse\",\n symbolizer: new PolygonSymbolizer({\n fill: t.pier,\n }),\n filter: (z, f) => {\n return f.props.kind === \"pier\";\n },\n },\n {\n dataLayer: \"buildings\",\n symbolizer: new PolygonSymbolizer({\n fill: t.buildings,\n opacity: 0.5,\n }),\n },\n {\n dataLayer: \"roads\",\n symbolizer: new LineSymbolizer({\n color: t.major,\n width: (z, f) => {\n return exp(1.6, [\n [14, 0],\n [20, 7],\n ])(z);\n },\n }),\n filter: (z, f) => {\n const kind = getString(f.props, \"kind\");\n return [\"other\", \"path\"].includes(kind);\n },\n },\n {\n dataLayer: \"roads\",\n symbolizer: new LineSymbolizer({\n color: t.major,\n width: (z, f) => {\n return exp(1.6, [\n [13, 0],\n [18, 8],\n ])(z);\n },\n }),\n filter: (z, f) => {\n return f.props.kind === \"minor_road\";\n },\n },\n {\n dataLayer: \"roads\",\n symbolizer: new LineSymbolizer({\n color: t.major,\n width: (z, f) => {\n return exp(1.6, [\n [6, 0],\n [12, 1.6],\n [15, 3],\n [18, 13],\n ])(z);\n },\n }),\n filter: (z, f) => {\n return f.props.kind === \"major_road\";\n },\n },\n {\n dataLayer: \"roads\",\n symbolizer: new LineSymbolizer({\n color: t.major,\n width: (z, f) => {\n return exp(1.6, [\n [3, 0],\n [6, 1.1],\n [12, 1.6],\n [15, 5],\n [18, 15],\n ])(z);\n },\n }),\n filter: (z, f) => {\n return f.props.kind === \"highway\";\n },\n },\n {\n dataLayer: \"boundaries\",\n symbolizer: new LineSymbolizer({\n color: t.boundaries,\n width: 1,\n }),\n filter: (z, f) => {\n const minAdminLevel = f.props.kind_detail;\n return typeof minAdminLevel === \"number\" && minAdminLevel <= 2;\n },\n },\n {\n dataLayer: \"roads\",\n symbolizer: new LineSymbolizer({\n dash: [0.3, 0.75],\n color: t.railway,\n dashWidth: (z, f) => {\n return exp(1.6, [\n [4, 0],\n [7, 0.15],\n [19, 9],\n ])(z);\n },\n opacity: 0.5,\n }),\n filter: (z, f) => {\n return f.props.kind === \"rail\";\n },\n },\n {\n dataLayer: \"boundaries\",\n symbolizer: new LineSymbolizer({\n color: t.boundaries,\n width: 0.5,\n }),\n filter: (z, f) => {\n const minAdminLevel = f.props.kind_detail;\n return typeof minAdminLevel === \"number\" && minAdminLevel > 2;\n },\n },\n ];\n};\n\nexport const labelRules = (t: Flavor, lang: string): LabelRule[] => {\n const nametags = [`name:${lang}`, \"name\"];\n\n return [\n // {\n // id: \"neighbourhood\",\n // dataLayer: \"places\",\n // symbolizer: languageStack(\n // new CenteredTextSymbolizer({\n // labelProps: nametags,\n // fill: params.neighbourhoodLabel,\n // font: \"500 10px sans-serif\",\n // textTransform: \"uppercase\",\n // }),\n // params.neighbourhoodLabel,\n // ),\n // filter: (z, f) => {\n // return f.props[\"kind\"] === \"neighbourhood\";\n // },\n // },\n {\n dataLayer: \"roads\",\n symbolizer: new LineLabelSymbolizer({\n labelProps: nametags,\n fill: t.roads_label_minor,\n font: \"400 12px sans-serif\",\n width: 2,\n stroke: t.roads_label_minor_halo,\n }),\n // TODO: sort by minzoom\n minzoom: 16,\n filter: (z, f) => {\n const kind = getString(f.props, \"kind\");\n return [\"minor_road\", \"other\", \"path\"].includes(kind);\n },\n },\n {\n dataLayer: \"roads\",\n symbolizer: new LineLabelSymbolizer({\n labelProps: nametags,\n fill: t.roads_label_major,\n font: \"400 12px sans-serif\",\n width: 2,\n stroke: t.roads_label_major_halo,\n }),\n // TODO: sort by minzoom\n minzoom: 12,\n filter: (z, f) => {\n const kind = getString(f.props, \"kind\");\n return [\"highway\", \"major_road\"].includes(kind);\n },\n },\n {\n dataLayer: \"roads\",\n symbolizer: new LineLabelSymbolizer({\n labelProps: nametags,\n fill: t.roads_label_major,\n font: \"400 12px sans-serif\",\n width: 2,\n stroke: t.roads_label_major_halo,\n }),\n // TODO: sort by minzoom\n minzoom: 12,\n filter: (z, f) => {\n const kind = getString(f.props, \"kind\");\n return [\"highway\", \"major_road\"].includes(kind);\n },\n },\n {\n dataLayer: \"water\",\n symbolizer: new CenteredTextSymbolizer({\n labelProps: nametags,\n fill: t.ocean_label,\n lineHeight: 1.5,\n letterSpacing: 1,\n font: (z, f) => {\n const size = linear([\n [3, 10],\n [10, 12],\n ])(z);\n return `400 ${size}px sans-serif`;\n },\n textTransform: \"uppercase\",\n }),\n filter: (z, f) => {\n const kind = getString(f.props, \"kind\");\n return (\n f.geomType === GeomType.Point &&\n [\"ocean\", \"bay\", \"strait\", \"fjord\"].includes(kind)\n );\n },\n },\n {\n dataLayer: \"water\",\n symbolizer: new CenteredTextSymbolizer({\n labelProps: nametags,\n fill: t.ocean_label,\n lineHeight: 1.5,\n letterSpacing: 1,\n font: (z, f) => {\n const size = linear([\n [3, 10],\n [6, 12],\n [10, 12],\n ])(z);\n return `400 ${size}px sans-serif`;\n },\n }),\n filter: (z, f) => {\n const kind = getString(f.props, \"kind\");\n return (\n f.geomType === GeomType.Point &&\n [\"sea\", \"lake\", \"water\"].includes(kind)\n );\n },\n },\n {\n dataLayer: \"places\",\n symbolizer: new CenteredTextSymbolizer({\n labelProps: (z, f) => {\n if (z < 6) {\n return [`ref:${lang}`, \"ref\"];\n }\n return nametags;\n },\n fill: t.state_label,\n stroke: t.state_label_halo,\n width: 1,\n lineHeight: 1.5,\n font: (z: number, f?: Feature) => {\n return \"400 12px sans-serif\";\n },\n textTransform: \"uppercase\",\n }),\n filter: (z, f) => {\n return f.props.kind === \"region\";\n },\n },\n {\n dataLayer: \"places\",\n symbolizer: new CenteredTextSymbolizer({\n labelProps: nametags,\n fill: t.country_label,\n lineHeight: 1.5,\n font: (z: number, f?: Feature) => {\n if (z < 6) return \"600 12px sans-serif\";\n return \"600 12px sans-serif\";\n },\n textTransform: \"uppercase\",\n }),\n filter: (z, f) => {\n return f.props.kind === \"country\";\n },\n },\n {\n // places_locality\n dataLayer: \"places\",\n minzoom: 9,\n symbolizer: new CenteredTextSymbolizer({\n labelProps: nametags,\n fill: t.city_label,\n lineHeight: 1.5,\n font: (z: number, f?: Feature) => {\n if (!f) return \"400 12px sans-serif\";\n const minZoom = f.props.min_zoom;\n let weight = 400;\n if (minZoom && minZoom <= 5) {\n weight = 600;\n }\n let size = 12;\n const popRank = f.props.population_rank;\n if (popRank && popRank > 9) {\n size = 16;\n }\n return `${weight} ${size}px sans-serif`;\n },\n }),\n sort: (a, b) => {\n const aRank = getNumber(a, \"min_zoom\");\n const bRank = getNumber(b, \"min_zoom\");\n return aRank - bRank;\n },\n filter: (z, f) => {\n return f.props.kind === \"locality\";\n },\n },\n {\n dataLayer: \"places\",\n maxzoom: 8,\n symbolizer: new GroupSymbolizer([\n new CircleSymbolizer({\n radius: 2,\n fill: t.city_label,\n stroke: t.city_label_halo,\n width: 1.5,\n }),\n new OffsetTextSymbolizer({\n labelProps: nametags,\n fill: t.city_label,\n stroke: t.city_label_halo,\n width: 1,\n offsetX: 6,\n offsetY: 4.5,\n font: (z, f) => {\n return \"400 12px sans-serif\";\n },\n }),\n ]),\n filter: (z, f) => {\n return f.props.kind === \"locality\";\n },\n },\n ];\n};\n","import { Feature } from \"./tilecache\";\n\nexport type AttrOption = T | ((z: number, f?: Feature) => T);\n\nexport class StringAttr {\n str: AttrOption;\n perFeature: boolean;\n\n constructor(c: AttrOption | undefined, defaultValue: T) {\n this.str = c ?? defaultValue;\n this.perFeature = typeof this.str === \"function\" && this.str.length === 2;\n }\n\n public get(z: number, f?: Feature): T {\n if (typeof this.str === \"function\") {\n return this.str(z, f);\n }\n return this.str;\n }\n}\n\nexport class NumberAttr {\n value: AttrOption;\n perFeature: boolean;\n\n constructor(c: AttrOption | undefined, defaultValue = 1) {\n this.value = c ?? defaultValue;\n this.perFeature =\n typeof this.value === \"function\" && this.value.length === 2;\n }\n\n public get(z: number, f?: Feature): number {\n if (typeof this.value === \"function\") {\n return this.value(z, f);\n }\n return this.value;\n }\n}\n\nexport interface TextAttrOptions {\n labelProps?: AttrOption;\n textTransform?: AttrOption;\n}\n\nexport class TextAttr {\n labelProps: AttrOption;\n textTransform?: AttrOption;\n\n constructor(options?: TextAttrOptions) {\n this.labelProps = options?.labelProps ?? [\"name\"];\n this.textTransform = options?.textTransform;\n }\n\n public get(z: number, f: Feature): string | undefined {\n let retval: string | undefined;\n\n let labelProps: string[];\n if (typeof this.labelProps === \"function\") {\n labelProps = this.labelProps(z, f);\n } else {\n labelProps = this.labelProps;\n }\n for (const property of labelProps) {\n if (\n Object.prototype.hasOwnProperty.call(f.props, property) &&\n typeof f.props[property] === \"string\"\n ) {\n retval = f.props[property] as string;\n break;\n }\n }\n let transform: string | ((z: number, f: Feature) => string) | undefined;\n if (typeof this.textTransform === \"function\") {\n transform = this.textTransform(z, f);\n } else {\n transform = this.textTransform;\n }\n if (retval && transform === \"uppercase\") retval = retval.toUpperCase();\n else if (retval && transform === \"lowercase\") retval = retval.toLowerCase();\n else if (retval && transform === \"capitalize\") {\n const wordsArray = retval.toLowerCase().split(\" \");\n const capsArray = wordsArray.map((word: string) => {\n return word[0].toUpperCase() + word.slice(1);\n });\n retval = capsArray.join(\" \");\n }\n return retval;\n }\n}\n\nexport interface FontAttrOptions {\n font?: AttrOption;\n fontFamily?: AttrOption;\n fontSize?: AttrOption;\n fontWeight?: AttrOption;\n fontStyle?: AttrOption;\n}\n\nexport class FontAttr {\n family?: AttrOption;\n size?: AttrOption;\n weight?: AttrOption;\n style?: AttrOption;\n font?: AttrOption;\n\n constructor(options?: FontAttrOptions) {\n if (options?.font) {\n this.font = options.font;\n } else {\n this.family = options?.fontFamily ?? \"sans-serif\";\n this.size = options?.fontSize ?? 12;\n this.weight = options?.fontWeight;\n this.style = options?.fontStyle;\n }\n }\n\n public get(z: number, f?: Feature) {\n if (this.font) {\n if (typeof this.font === \"function\") {\n return this.font(z, f);\n }\n return this.font;\n }\n let style = \"\";\n if (this.style) {\n if (typeof this.style === \"function\") {\n style = `${this.style(z, f)} `;\n } else {\n style = `${this.style} `;\n }\n }\n\n let weight = \"\";\n if (this.weight) {\n if (typeof this.weight === \"function\") {\n weight = `${this.weight(z, f)} `;\n } else {\n weight = `${this.weight} `;\n }\n }\n\n let size: number | ((z: number, f: Feature) => number) | undefined;\n if (typeof this.size === \"function\") {\n size = this.size(z, f);\n } else {\n size = this.size;\n }\n\n let family: string | ((z: number, f: Feature) => string) | undefined;\n if (typeof this.family === \"function\") {\n family = this.family(z, f);\n } else {\n family = this.family;\n }\n\n return `${style}${weight}${size}px ${family}`;\n }\n}\n\nexport class ArrayAttr {\n value: AttrOption;\n perFeature: boolean;\n\n constructor(c: AttrOption, defaultValue: T[] = []) {\n this.value = c ?? defaultValue;\n this.perFeature =\n typeof this.value === \"function\" && this.value.length === 2;\n }\n\n public get(z: number, f?: Feature): T[] {\n if (typeof this.value === \"function\") {\n return this.value(z, f);\n }\n return this.value;\n }\n}\n","import potpack from \"potpack\";\n\n// https://github.com/tangrams/tangram/blob/master/src/styles/text/font_manager.js\nexport const Font = (name: string, url: string, weight: string) => {\n const ff = new FontFace(name, `url(${url})`, { weight: weight });\n document.fonts.add(ff);\n return ff.load();\n};\n\ninterface Sprite {\n x: number;\n y: number;\n w: number;\n h: number;\n}\n\ninterface PotPackInput {\n x?: number;\n y?: number;\n w: number;\n h: number;\n id: string;\n img: HTMLImageElement;\n}\n\nconst mkimg = async (src: string): Promise => {\n return new Promise((resolve, reject) => {\n const img = new Image();\n img.onload = () => resolve(img);\n img.onerror = () => reject(\"Invalid SVG\");\n img.src = src;\n });\n};\n\nconst MISSING = `\n\n \n \n \n \n\n`;\n\nexport class Sheet {\n src: string;\n canvas: HTMLCanvasElement;\n mapping: Map;\n missingBox: Sprite;\n\n constructor(src: string) {\n this.src = src;\n this.canvas = document.createElement(\"canvas\");\n this.mapping = new Map();\n this.missingBox = { x: 0, y: 0, w: 0, h: 0 };\n }\n\n async load() {\n let src = this.src;\n const scale = window.devicePixelRatio;\n if (src.endsWith(\".html\")) {\n const c = await fetch(src);\n src = await c.text();\n }\n const tree = new window.DOMParser().parseFromString(src, \"text/html\");\n const icons = Array.from(tree.body.children);\n\n const missingImg = await mkimg(\n `data:image/svg+xml;base64,${btoa(MISSING)}`,\n );\n\n const boxes: PotPackInput[] = [\n {\n w: missingImg.width * scale,\n h: missingImg.height * scale,\n img: missingImg,\n id: \"\",\n },\n ];\n\n const serializer = new XMLSerializer();\n for (const ps of icons) {\n const svg64 = btoa(serializer.serializeToString(ps));\n const image64 = `data:image/svg+xml;base64,${svg64}`;\n const img = await mkimg(image64);\n boxes.push({\n w: img.width * scale,\n h: img.height * scale,\n img: img,\n id: ps.id,\n });\n }\n\n const packresult = potpack(boxes);\n this.canvas.width = packresult.w;\n this.canvas.height = packresult.h;\n const ctx = this.canvas.getContext(\"2d\");\n if (ctx) {\n for (const box of boxes) {\n if (box.x !== undefined && box.y !== undefined) {\n ctx.drawImage(box.img, box.x, box.y, box.w, box.h);\n if (box.id)\n this.mapping.set(box.id, {\n x: box.x,\n y: box.y,\n w: box.w,\n h: box.h,\n });\n else this.missingBox = { x: box.x, y: box.y, w: box.w, h: box.h };\n }\n }\n }\n return this;\n }\n\n get(name: string): Sprite {\n let result = this.mapping.get(name);\n if (!result) result = this.missingBox;\n return result;\n }\n}\n"]}