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Remove legacy: the minOverlapPercentage can now be built with a calculated tag and isShown

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Pieter Vander Vennet 2021-03-26 03:24:58 +01:00
parent 53e70b9a9c
commit ad406b5550
14 changed files with 237 additions and 252 deletions
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148
Logic/ExtraFunction.ts
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@ -5,59 +5,9 @@ import Combine from "../UI/Base/Combine";
export class ExtraFunction {
private static DistanceToFunc = new ExtraFunction(
"distanceTo",
"Calculates the distance between the feature and a specified point",
["longitude", "latitude"],
(feature) => {
return (lon, lat) => {
// Feature._lon and ._lat is conveniently place by one of the other metatags
return GeoOperations.distanceBetween([lon, lat], [feature._lon, feature._lat]);
}
}
)
private static readonly allFuncs: ExtraFunction[] = [ExtraFunction.DistanceToFunc];
private readonly _name: string;
private readonly _args: string[];
private readonly _doc: string;
private readonly _f: (feat: any) => any;
constructor(name: string, doc: string, args: string[], f: ((feat: any) => any)) {
this._name = name;
this._doc = doc;
this._args = args;
this._f = f;
}
public static FullPatchFeature(feature) {
for (const func of ExtraFunction.allFuncs) {
func.PatchFeature(feature);
}
}
public static HelpText(): UIElement {
return new Combine([
ExtraFunction.intro,
...ExtraFunction.allFuncs.map(func =>
new Combine([
"<h3>" + func._name + "</h3>",
func._doc,
"<ul>",
...func._args.map(arg => "<li>" + arg + "</li>"),
"</ul>"
])
)
]);
}
public PatchFeature(feature: any) {
feature[this._name] = this._f(feature);
}
static readonly intro = `<h2>Calculating tags with Javascript</h2>
<p>In some cases, it is useful to have some tags calculated based on other properties. Some useful tags are available by default (e.g. <b>_lat</b>, <b>lon</b>, <b>_country</b>), as detailed above.</p>
<p>In some cases, it is useful to have some tags calculated based on other properties. Some useful tags are available by default (e.g. <b>lat</b>, <b>lon</b>, <b>_country</b>), as detailed above.</p>
<p>It is also possible to calculate your own tags - but this requires some javascript knowledge. </p>
@ -71,11 +21,97 @@ Before proceeding, some warnings:
In the layer object, add a field <b>calculatedTags</b>, e.g.:
<div class="code">
"calculatedTags": {
"_someKey": "javascript-expression",
"name": "feat.properties.name ?? feat.properties.ref ?? feat.properties.operator",
"_distanceCloserThen3Km": "feat.distanceTo( some_lon, some_lat) < 3 ? 'yes' : 'no'"
}
"calculatedTags": [
"_someKey=javascript-expression",
"name=feat.properties.name ?? feat.properties.ref ?? feat.properties.operator",
"_distanceCloserThen3Km=feat.distanceTo( some_lon, some_lat) < 3 ? 'yes' : 'no'"
]
</div>
The above code will be executed for every feature in the layer. The feature is accessible as <b>feat</b> and is an amended geojson object:
- <b>area</b> contains the surface area (in square meters) of the object
- <b>lat</b> and <b>lon</b> contain the latitude and longitude
Some advanced functions are available on <b>feat</b> as well:
`
private static OverlapFunc = new ExtraFunction(
"overlapWith",
"Gives a list of features from the specified layer which this feature overlaps with, the amount of overlap in m². The returned value is <b>{ feat: GeoJSONFeature, overlap: number}</b>",
["...layerIds - one or more layer ids of the layer from which every feature is checked for overlap)"],
(featuresPerLayer, feat) => {
return (...layerIds: string[]) => {
const result = []
for (const layerId of layerIds) {
const otherLayer = featuresPerLayer.get(layerId);
if (otherLayer === undefined) {
console.error(`Trying to calculate 'overlapWith' with specified layer ${layerId}, but such layer is found`);
continue;
}
if (otherLayer.length === 0) {
continue;
}
result.push(...GeoOperations.calculateOverlap(feat, otherLayer));
}
return result;
}
}
)
private static DistanceToFunc = new ExtraFunction(
"distanceTo",
"Calculates the distance between the feature and a specified point",
["longitude", "latitude"],
(featuresPerLayer, feature) => {
return (lon, lat) => {
// Feature._lon and ._lat is conveniently place by one of the other metatags
return GeoOperations.distanceBetween([lon, lat], [feature._lon, feature._lat]);
}
}
)
private static readonly allFuncs: ExtraFunction[] = [ExtraFunction.DistanceToFunc, ExtraFunction.OverlapFunc];
private readonly _name: string;
private readonly _args: string[];
private readonly _doc: string;
private readonly _f: (featuresPerLayer: Map<string, any[]>, feat: any) => any;
constructor(name: string, doc: string, args: string[], f: ((featuresPerLayer: Map<string, any[]>, feat: any) => any)) {
this._name = name;
this._doc = doc;
this._args = args;
this._f = f;
}
public static FullPatchFeature(featuresPerLayer: Map<string, any[]>, feature) {
for (const func of ExtraFunction.allFuncs) {
func.PatchFeature(featuresPerLayer, feature);
}
}
public static HelpText(): UIElement {
return new Combine([
ExtraFunction.intro,
"<ul>",
...ExtraFunction.allFuncs.map(func =>
new Combine([
"<li>", func._name, "</li>"
])
),
"</ul>",
...ExtraFunction.allFuncs.map(func =>
new Combine([
"<h3>" + func._name + "</h3>",
func._doc,
"<ul>",
...func._args.map(arg => "<li>" + arg + "</li>"),
"</ul>"
])
)
]);
}
public PatchFeature(featuresPerLayer: Map<string, any[]>, feature: any) {
feature[this._name] = this._f(featuresPerLayer, feature);
}
}