feat: option to translate labels for static maps
Signed-off-by: Martin d'Allens <martin.dallens@liberty-rider.com>
This commit is contained in:
Martin d'Allens
parent
1b97491739
commit
57931c889d
8 changed files with 294 additions and 24 deletions
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@ -28,8 +28,8 @@ docker build -t tileserver-gl-light .
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[Download from OpenMapTiles.com](https://openmaptiles.com/downloads/planet/) or [create](https://github.com/openmaptiles/openmaptiles) your vector tile, and run following in directory contains your *.mbtiles.
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```
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docker run --rm -it -v $(pwd):/data -p 8000:80 tileserver-gl-light
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docker run --rm -it -v $(pwd):/data -p 8080:8080 tileserver-gl-light
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```
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## Documentation
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You can read full documentation of this project at https://tileserver.readthedocs.io/.
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You can read full documentation of this project at https://tileserver.readthedocs.io/.
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@ -33,6 +33,7 @@ Example:
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"serveAllStyles": false,
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"serveStaticMaps": true,
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"allowRemoteMarkerIcons": true,
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"languages": ["en", "fr", "it"],
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"tileMargin": 0
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},
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"styles": {
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@ -150,6 +151,13 @@ Allows the rendering of marker icons fetched via http(s) hyperlinks.
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For security reasons only allow this if you can control the origins from where the markers are fetched!
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Default is to disallow fetching of icons from remote sources.
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``languages``
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--------------
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Allows translating labels when rendering static maps. This is a list of allowed languages.
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Note that your vector tile source needs to contain the translated labels (e.g. ``name:en``, ``name:fr``...).
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Not used by default.
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``styles``
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==========
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@ -27,13 +27,13 @@ WMTS Capabilities
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Static images
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=============
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* Several endpoints:
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* There are three endpoints depending on how you want to define the map location:
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* ``/styles/{id}/static/{lon},{lat},{zoom}[@{bearing}[,{pitch}]]/{width}x{height}[@2x].{format}`` (center-based)
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* ``/styles/{id}/static/{minx},{miny},{maxx},{maxy}/{width}x{height}[@2x].{format}`` (area-based)
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* ``/styles/{id}/static/auto/{width}x{height}[@2x].{format}`` (autofit path -- see below)
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* Center and zoom level: ``/styles/{id}/static/{lon},{lat},{zoom}[@{bearing}[,{pitch}]]/{width}x{height}[@2x].{format}``
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* Bounds, e.g. latitude/longitude of corners: ``/styles/{id}/static/{minx},{miny},{maxx},{maxy}/{width}x{height}[@2x].{format}``
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* Autofit to a path: ``/styles/{id}/static/auto/{width}x{height}[@2x].{format}``
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* All the static image endpoints additionally support following query parameters:
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* All these endpoints accept these query parameters:
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* ``path`` - ``((fill|stroke|width)\:[^\|]+\|)*((enc:.+)|((-?\d+\.?\d*,-?\d+\.?\d*\|)+(-?\d+\.?\d*,-?\d+\.?\d*)))``
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@ -50,7 +50,7 @@ Static images
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* e.g. ``path=stroke:yellow|width:2|fill:green|5.9,45.8|5.9,47.8|10.5,47.8|10.5,45.8|5.9,45.8`` or ``path=stroke:blue|width:1|fill:yellow|enc:_p~iF~ps|U_ulLnnqC_mqNvxq`@``
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* can be provided multiple times
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* can be provided multiple times
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* ``latlng`` - indicates coordinates are in ``lat,lng`` order rather than the usual ``lng,lat``
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* ``fill`` - color to use as the fill (e.g. ``red``, ``rgba(255,255,255,0.5)``, ``#0000ff``)
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@ -84,6 +84,7 @@ Static images
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* value of ``0.1`` means "add 10% size to each side to make sure the area of interest is nicely visible"
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* ``maxzoom`` - Maximum zoom level (only for auto endpoint where zoom level is calculated and not provided)
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* ``language`` - Language code to translate all labels from the selected style. If no language is set or if the language is not found in ``options.languages``, no translation happens.
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* You can also use (experimental) ``/styles/{id}/static/raw/...`` endpoints with raw spherical mercator coordinates (EPSG:3857) instead of WGS84.
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@ -43,6 +43,9 @@
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{{#if serving_rendered}}
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| <a href="{{public_url}}styles/{{@key}}/wmts.xml{{&../key_query}}">WMTS</a>
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{{/if}}
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{{#if serving_rendered}}
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| <a href="{{public_url}}styles/{{@key}}/static/{{static_center}}/500x400@2x.png{{&../key_query}}">Static</a>
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{{/if}}
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{{#if xyz_link}}
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| <a href="#" onclick="return toggle_xyz('xyz_style_{{@key}}');">XYZ</a>
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<input id="xyz_style_{{@key}}" type="text" value="{{&xyz_link}}" style="display:none;" />
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@ -19,6 +19,7 @@ import polyline from '@mapbox/polyline';
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import proj4 from 'proj4';
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import request from 'request';
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import { getFontsPbf, getTileUrls, fixTileJSONCenter } from './utils.js';
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import translateLayers from './translate_layers.js';
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const FLOAT_PATTERN = '[+-]?(?:\\d+|\\d+.?\\d+)';
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const PATH_PATTERN =
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@ -202,6 +203,19 @@ const extractPathsFromQuery = (query, transformer) => {
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return paths;
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};
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/**
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* Parses language provided via query.
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* @param {object} query Request query parameters.
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* @param {object} options Configuration options.
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*/
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const extractLanguageFromQuery = (query, options) => {
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const languages = options.languages || [];
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if ('language' in query && languages.includes(query.language)) {
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return query.language;
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}
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return null;
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};
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/**
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* Parses marker options provided via query and sets corresponding attributes
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* on marker object.
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@ -330,7 +344,7 @@ const precisePx = (ll, zoom) => {
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};
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/**
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* Draws a marker in cavans context.
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* Draws a marker in canvas context.
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* @param {object} ctx Canvas context object.
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* @param {object} marker Marker object parsed by extractMarkersFromQuery.
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* @param {number} z Map zoom level.
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@ -646,6 +660,7 @@ export const serve_rendered = {
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next,
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opt_overlay,
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opt_mode = 'tile',
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language = null,
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) => {
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if (
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Math.abs(lon) > 180 ||
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@ -677,7 +692,7 @@ export const serve_rendered = {
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if (opt_mode === 'tile' && tileMargin === 0) {
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pool = item.map.renderers[scale];
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} else {
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pool = item.map.renderers_static[scale];
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pool = item.map.renderers_static[`${scale}${language}`];
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}
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pool.acquire((err, renderer) => {
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const mlglZ = Math.max(0, z - 1);
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@ -712,6 +727,7 @@ export const serve_rendered = {
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// Fix semi-transparent outlines on raw, premultiplied input
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// https://github.com/maptiler/tileserver-gl/issues/350#issuecomment-477857040
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// FIXME: unnecessay now? https://github.com/lovell/sharp/issues/1599#issuecomment-837004081
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for (let i = 0; i < data.length; i += 4) {
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const alpha = data[i + 3];
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const norm = alpha / 255;
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@ -901,6 +917,7 @@ export const serve_rendered = {
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}
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const paths = extractPathsFromQuery(req.query, transformer);
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const language = extractLanguageFromQuery(req.query, options);
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const markers = extractMarkersFromQuery(
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req.query,
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options,
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@ -935,6 +952,7 @@ export const serve_rendered = {
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next,
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overlay,
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'static',
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language,
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);
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} catch (e) {
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next(e);
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@ -983,6 +1001,7 @@ export const serve_rendered = {
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const pitch = 0;
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const paths = extractPathsFromQuery(req.query, transformer);
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const language = extractLanguageFromQuery(req.query, options);
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const markers = extractMarkersFromQuery(
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req.query,
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options,
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@ -1016,6 +1035,7 @@ export const serve_rendered = {
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next,
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overlay,
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'static',
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language,
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);
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} catch (e) {
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next(e);
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@ -1077,6 +1097,7 @@ export const serve_rendered = {
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: item.dataProjWGStoInternalWGS;
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const paths = extractPathsFromQuery(req.query, transformer);
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const language = extractLanguageFromQuery(req.query, options);
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const markers = extractMarkersFromQuery(
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req.query,
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options,
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@ -1150,6 +1171,7 @@ export const serve_rendered = {
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next,
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overlay,
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'static',
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language,
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);
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} catch (e) {
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next(e);
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@ -1184,14 +1206,16 @@ export const serve_rendered = {
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};
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let styleJSON;
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const createPool = (ratio, mode, min, max) => {
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const createRenderer = (ratio, createCallback) => {
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const createPool = (scale, mode, min, max, language) => {
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const createRenderer = (createCallback) => {
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const renderer = new mlgl.Map({
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mode: mode,
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ratio: ratio,
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ratio: scale,
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request: (req, callback) => {
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const protocol = req.url.split(':')[0];
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// console.log('Handling request:', req);
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if (options.verbose) {
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console.log('[VERBOSE] Handling request:', req);
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}
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if (protocol === 'sprites') {
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const dir = options.paths[protocol];
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const file = unescape(req.url).substring(protocol.length + 3);
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@ -1282,7 +1306,9 @@ export const serve_rendered = {
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const extension = path.extname(parts.pathname).toLowerCase();
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const format = extensionToFormat[extension] || '';
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if (err || res.statusCode < 200 || res.statusCode >= 300) {
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// console.log('HTTP error', err || res.statusCode);
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if (options.verbose) {
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console.log('HTTP error', err || res.statusCode);
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}
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createEmptyResponse(format, '', callback);
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return;
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}
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@ -1305,13 +1331,37 @@ export const serve_rendered = {
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}
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},
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});
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renderer.load(styleJSON);
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if (options.verbose) {
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console.log('[VERBOSE] createRenderer', scale, mode, language);
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}
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let rendererStyle = styleJSON;
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if (language) {
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const layers = [...styleJSON.layers];
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rendererStyle = { ...rendererStyle, layers };
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const translator = {
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getLayoutProperty: (id, key) =>
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layers.find((layer) => layer.id === id).layout[key],
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setLayoutProperty: (id, key, value) => {
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const i = layers.findIndex((layer) => layer.id === id);
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const layer = { ...layers[i] };
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layers[i] = layer;
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layer.layout = { ...layer.layout, [key]: value };
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},
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translateLayers,
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};
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translator.translateLayers(layers, language);
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}
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renderer.load(rendererStyle);
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createCallback(null, renderer);
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};
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return new advancedPool.Pool({
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min: min,
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max: max,
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create: createRenderer.bind(null, ratio),
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create: createRenderer.bind(null),
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destroy: (renderer) => {
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renderer.release();
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},
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@ -1471,13 +1521,18 @@ export const serve_rendered = {
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const j = Math.min(maxPoolSizes.length - 1, s - 1);
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const minPoolSize = minPoolSizes[i];
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const maxPoolSize = Math.max(minPoolSize, maxPoolSizes[j]);
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map.renderers[s] = createPool(s, 'tile', minPoolSize, maxPoolSize);
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map.renderers_static[s] = createPool(
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s,
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'static',
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minPoolSize,
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maxPoolSize,
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);
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const languages = new Set([null, ...(options.languages || [])]);
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map.renderers[s] = createPool(s, 'tile', minPoolSize, maxPoolSize, null);
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for (const language of languages) {
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map.renderers_static[`${s}${language}`] = createPool(
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s,
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'static',
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language ? 1 : minPoolSize,
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language ? 1 : maxPoolSize,
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language,
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);
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}
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}
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});
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@ -83,6 +83,7 @@ function start(opts) {
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}
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const options = config.options || {};
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options.verbose = opts.verbose;
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const paths = options.paths || {};
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options.paths = paths;
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paths.root = path.resolve(
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@ -441,6 +442,10 @@ function start(opts) {
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style.thumbnail = `${center[2]}/${Math.floor(
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centerPx[0] / 256,
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)}/${Math.floor(centerPx[1] / 256)}.png`;
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style.static_center = `${center[0].toFixed(5)},${center[1].toFixed(
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5,
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)},${center[2]}`;
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}
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style.xyz_link = getTileUrls(
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186
src/translate_layers.js
Normal file
186
src/translate_layers.js
Normal file
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@ -0,0 +1,186 @@
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/*
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File copied from https://github.com/maptiler/maptiler-sdk-js/blob/c5c7a343dcf4083a5eca75ede319991b80fcb652/src/Map.ts#L579
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BSD 3-Clause License
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Copyright (c) 2022, MapTiler
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// prettier-ignore
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export default function translateLayers(layers, language) {
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/* eslint-disable */
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// detects pattern like "{name:somelanguage}" with loose spacing
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const strLanguageRegex = /^\s*{\s*name\s*(:\s*(\S*))?\s*}$/;
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// detects pattern like "name:somelanguage" with loose spacing
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const strLanguageInArrayRegex = /^\s*name\s*(:\s*(\S*))?\s*$/;
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// for string based bilingual lang such as "{name:latin} {name:nonlatin}" or "{name:latin} {name}"
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const strBilingualRegex =
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/^\s*{\s*name\s*(:\s*(\S*))?\s*}(\s*){\s*name\s*(:\s*(\S*))?\s*}$/;
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// Regex to capture when there are more info, such as mountains elevation with unit m/ft
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const strMoreInfoRegex = /^(.*)({\s*name\s*(:\s*(\S*))?\s*})(.*)$/;
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const langStr = language ? `name:${language}` : "name"; // to handle local lang
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const replacer = [
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"case",
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["has", langStr],
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["get", langStr],
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["get", "name"],
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];
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for (let i = 0; i < layers.length; i += 1) {
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const layer = layers[i];
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const layout = layer.layout;
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if (!layout) {
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continue;
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}
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if (!layout["text-field"]) {
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continue;
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}
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const textFieldLayoutProp = this.getLayoutProperty(
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layer.id,
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"text-field"
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);
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// Note:
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// The value of the 'text-field' property can take multiple shape;
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// 1. can be an array with 'concat' on its first element (most likely means bilingual)
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// 2. can be an array with 'get' on its first element (monolingual)
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// 3. can be a string of shape '{name:latin}'
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// 4. can be a string referencing another prop such as '{housenumber}' or '{ref}'
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//
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// The case 1, 2 and 3 will be updated while maintaining their original type and shape.
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// The case 3 will not be updated
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let regexMatch;
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// This is case 1
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if (
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Array.isArray(textFieldLayoutProp) &&
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textFieldLayoutProp.length >= 2 &&
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textFieldLayoutProp[0].trim().toLowerCase() === "concat"
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) {
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const newProp = textFieldLayoutProp.slice(); // newProp is Array
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// The style could possibly have defined more than 2 concatenated language strings but we only want to edit the first
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// The style could also define that there are more things being concatenated and not only languages
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for (let j = 0; j < textFieldLayoutProp.length; j += 1) {
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const elem = textFieldLayoutProp[j];
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// we are looking for an elem of shape '{name:somelangage}' (string) of `["get", "name:somelanguage"]` (array)
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// the entry of of shape '{name:somelangage}', possibly with loose spacing
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if (
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(typeof elem === "string" || elem instanceof String) &&
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strLanguageRegex.exec(elem.toString())
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) {
|
||||
newProp[j] = replacer;
|
||||
break; // we just want to update the primary language
|
||||
}
|
||||
// the entry is of an array of shape `["get", "name:somelanguage"]`
|
||||
else if (
|
||||
Array.isArray(elem) &&
|
||||
elem.length >= 2 &&
|
||||
elem[0].trim().toLowerCase() === "get" &&
|
||||
strLanguageInArrayRegex.exec(elem[1].toString())
|
||||
) {
|
||||
newProp[j] = replacer;
|
||||
break; // we just want to update the primary language
|
||||
} else if (
|
||||
Array.isArray(elem) &&
|
||||
elem.length === 4 &&
|
||||
elem[0].trim().toLowerCase() === "case"
|
||||
) {
|
||||
newProp[j] = replacer;
|
||||
break; // we just want to update the primary language
|
||||
}
|
||||
}
|
||||
|
||||
this.setLayoutProperty(layer.id, "text-field", newProp);
|
||||
}
|
||||
|
||||
// This is case 2
|
||||
else if (
|
||||
Array.isArray(textFieldLayoutProp) &&
|
||||
textFieldLayoutProp.length >= 2 &&
|
||||
textFieldLayoutProp[0].trim().toLowerCase() === "get" &&
|
||||
strLanguageInArrayRegex.exec(textFieldLayoutProp[1].toString())
|
||||
) {
|
||||
const newProp = replacer;
|
||||
this.setLayoutProperty(layer.id, "text-field", newProp);
|
||||
}
|
||||
|
||||
// This is case 3
|
||||
else if (
|
||||
(typeof textFieldLayoutProp === "string" ||
|
||||
textFieldLayoutProp instanceof String) &&
|
||||
strLanguageRegex.exec(textFieldLayoutProp.toString())
|
||||
) {
|
||||
const newProp = replacer;
|
||||
this.setLayoutProperty(layer.id, "text-field", newProp);
|
||||
} else if (
|
||||
Array.isArray(textFieldLayoutProp) &&
|
||||
textFieldLayoutProp.length === 4 &&
|
||||
textFieldLayoutProp[0].trim().toLowerCase() === "case"
|
||||
) {
|
||||
const newProp = replacer;
|
||||
this.setLayoutProperty(layer.id, "text-field", newProp);
|
||||
} else if (
|
||||
(typeof textFieldLayoutProp === "string" ||
|
||||
textFieldLayoutProp instanceof String) &&
|
||||
(regexMatch = strBilingualRegex.exec(
|
||||
textFieldLayoutProp.toString()
|
||||
)) !== null
|
||||
) {
|
||||
const newProp = `{${langStr}}${regexMatch[3]}{name${
|
||||
regexMatch[4] || ""
|
||||
}}`;
|
||||
this.setLayoutProperty(layer.id, "text-field", newProp);
|
||||
} else if (
|
||||
(typeof textFieldLayoutProp === "string" ||
|
||||
textFieldLayoutProp instanceof String) &&
|
||||
(regexMatch = strMoreInfoRegex.exec(
|
||||
textFieldLayoutProp.toString()
|
||||
)) !== null
|
||||
) {
|
||||
const newProp = `${regexMatch[1]}{${langStr}}${regexMatch[5]}`;
|
||||
this.setLayoutProperty(layer.id, "text-field", newProp);
|
||||
}
|
||||
}
|
||||
|
||||
/* eslint-enable */
|
||||
}
|
||||
|
|
@ -128,6 +128,18 @@ describe('Static endpoints', function () {
|
|||
|
||||
testStatic(prefix, '-280,-80,0,80/280x160', 'png', 200);
|
||||
});
|
||||
|
||||
describe('ignores an unknown language gracefully', function () {
|
||||
testStatic(
|
||||
prefix,
|
||||
'-180,-90,180,90/20x20',
|
||||
'png',
|
||||
200,
|
||||
2,
|
||||
undefined,
|
||||
'?language=kr',
|
||||
);
|
||||
});
|
||||
});
|
||||
|
||||
describe('invalid requests return 4xx', function () {
|
||||
|
|
|
|||
Loading…
Reference in a new issue