14 KiB
Special tag renderings
In a tagrendering, some special values are substituted by an advanced UI-element. This allows advanced features and visualizations to be reused by custom themes or even to query third-party API's.
General usage is {func_name()}, {func_name(arg, someotherarg)} or {func_name(args):cssStyle}. Note that you do not need to use quotes around your arguments, the comma is enough to separate them. This also implies you cannot use a comma in your args
- all_tags
- image_carousel
- image_upload
- wikipedia
- minimap
- sided_minimap
- reviews
- opening_hours_table
- live
- histogram
- share_link
- canonical
- import_button
- multi_apply
- tag_apply
all_tags
Prints all key-value pairs of the object - used for debugging
Example usage
{all_tags()}
image_carousel
Creates an image carousel for the given sources. An attempt will be made to guess what source is used. Supported: Wikidata identifiers, Wikipedia pages, Wikimedia categories, IMGUR (with attribution, direct links)
| name | default | description |
|---|---|---|
| image key/prefix (multiple values allowed if comma-seperated) | image,mapillary,image,wikidata,wikimedia_commons,image,image | The keys given to the images, e.g. if image is given, the first picture URL will be added as image, the second as image:0, the third as image:1, etc... |
Example usage
{image_carousel(image,mapillary,image,wikidata,wikimedia_commons,image,image)}
image_upload
Creates a button where a user can upload an image to IMGUR
| name | default | description |
|---|---|---|
| image-key | image | Image tag to add the URL to (or image-tag:0, image-tag:1 when multiple images are added) |
| label | Add image | The text to show on the button |
Example usage
{image_upload(image,Add image)}
wikipedia
A box showing the corresponding wikipedia article - based on the wikidata tag
| name | default | description |
|---|---|---|
| keyToShowWikipediaFor | wikidata | Use the wikidata entry from this key to show the wikipedia article for |
Example usage
{wikipedia()} is a basic example, {wikipedia(name:etymology:wikidata)} to show the wikipedia page of whom the feature was named after. Also remember that these can be styled, e.g. {wikipedia():max-height: 10rem} to limit the height
minimap
A small map showing the selected feature.
| name | default | description |
|---|---|---|
| zoomlevel | 18 | The (maximum) zoomlevel: the target zoomlevel after fitting the entire feature. The minimap will fit the entire feature, then zoom out to this zoom level. The higher, the more zoomed in with 1 being the entire world and 19 being really close |
| idKey | id | (Matches all resting arguments) This argument should be the key of a property of the feature. The corresponding value is interpreted as either the id or the a list of ID's. The features with these ID's will be shown on this minimap. |
Example usage
{minimap()}, {minimap(17, id, _list_of_embedded_feature_ids_calculated_by_calculated_tag):height:10rem; border: 2px solid black}
sided_minimap
A small map showing only one side the selected feature. This features requires to have linerenderings with offset as only linerenderings with a postive or negative offset will be shown. Note: in most cases, this map will be automatically introduced
| name | default | description |
|---|---|---|
| side | undefined | The side to show, either left or right |
Example usage
{sided_minimap(left)}
reviews
Adds an overview of the mangrove-reviews of this object. Mangrove.Reviews needs - in order to identify the reviewed object - a coordinate and a name. By default, the name of the object is given, but this can be overwritten
| name | default | description |
|---|---|---|
| subjectKey | name | The key to use to determine the subject. If specified, the subject will be tags[subjectKey] |
| fallback | undefined | The identifier to use, if tags[subjectKey] as specified above is not available. This is effectively a fallback value |
Example usage
{reviews()} for a vanilla review, {reviews(name, play_forest)} to review a play forest. If a name is known, the name will be used as identifier, otherwise 'play_forest' is used
opening_hours_table
Creates an opening-hours table. Usage: {opening_hours_table(opening_hours)} to create a table of the tag 'opening_hours'.
| name | default | description |
|---|---|---|
| key | opening_hours | The tagkey from which the table is constructed. |
| prefix | empty string | Remove this string from the start of the value before parsing. Note: use &LPARENs to indicate ( if needed |
| postfix | empty string | Remove this string from the end of the value before parsing. Note: use &RPARENs to indicate ) if needed |
Example usage
A normal opening hours table can be invoked with {opening_hours_table()}. A table for e.g. conditional access with opening hours can be {opening_hours_table(access:conditional, no @ &LPARENS, &RPARENS)}
live
Downloads a JSON from the given URL, e.g. '{live(example.org/data.json, shorthand:x.y.z, other:a.b.c, shorthand)}' will download the given file, will create an object {shorthand: json[x][y][z], other: json[a][b][c] out of it and will return 'other' or 'json[a][b][c]. This is made to use in combination with tags, e.g. {live({url}, {url:format}, needed_value)}
| name | default | description |
|---|---|---|
| Url | undefined | The URL to load |
| Shorthands | undefined | A list of shorthands, of the format 'shorthandname:path.path.path'. separated by ; |
| path | undefined | The path (or shorthand) that should be returned |
Example usage
{live({url},{url:format},hour)} {live(https://data.mobility.brussels/bike/api/counts/?request=live&featureID=CB2105,hour:data.hour_cnt;day:data.day_cnt;year:data.year_cnt,hour)}
histogram
Create a histogram for a list of given values, read from the properties.
| name | default | description |
|---|---|---|
| key | undefined | The key to be read and to generate a histogram from |
| title | empty string | The text to put above the given values column |
| countHeader | empty string | The text to put above the counts |
| colors* | undefined | (Matches all resting arguments - optional) Matches a regex onto a color value, e.g. 3[a-zA-Z+-]*:#33cc33 |
Example usage
{histogram('some_key')} with properties being `{some_key: ['a','b','a','c']} to create a histogram
share_link
Creates a link that (attempts to) open the native 'share'-screen
| name | default | description |
|---|---|---|
| url | undefined | The url to share (default: current URL) |
Example usage
{share_link()} to share the current page, {share_link(<some_url>)} to share the given url
canonical
Converts a short, canonical value into the long, translated text
| name | default | description |
|---|---|---|
| key | undefined | The key of the tag to give the canonical text for |
Example usage
{canonical(length)} will give 42 metre (in french)
import_button
This button will copy the data from an external dataset into OpenStreetMap. It is only functional in official themes but can be tested in unofficial themes.
Importing a dataset into OpenStreetMap: requirements
If you want to import a dataset, make sure that:
- The dataset to import has a suitable license
- The community has been informed of the import
- All other requirements of the import guidelines have been followed
There are also some technicalities in your theme to keep in mind:
- The new feature will be added and will flow through the program as any other new point as if it came from OSM. This means that there should be a layer which will match the new tags and which will display it.
- The original feature from your geojson layer will gain the tag '_imported=yes'. This should be used to change the appearance or even to hide it (eg by changing the icon size to zero)
- There should be a way for the theme to detect previously imported points, even after reloading. A reference number to the original dataset is an excellent way to do this
- When importing ways, the theme creator is also responsible of avoiding overlapping ways.
Disabled in unofficial themes
The import button can be tested in an unofficial theme by adding test=true or backend=osm-test as URL-paramter.
The import button will show up then. If in testmode, you can read the changeset-XML directly in the web console.
In the case that MapComplete is pointed to the testing grounds, the edit will be made on https://master.apis.dev.openstreetmap.org
Specifying which tags to copy or add
The argument tags of the import button takes a ;-seperated list of tags to add.
These can either be a tag to add, such as amenity=fast_food or can use a substitution, e.g. addr:housenumber=$number.
This new point will then have the tags amenity=fast_food and addr:housenumber with the value that was saved in number in the original feature.
If a value to substitute is undefined, empty string will be used instead.
This supports multiple values, e.g. ref=$source:geometry:type/$source:geometry:ref
Remark that the syntax is slightly different then expected; it uses '$' to note a value to copy, followed by a name (matched with [a-zA-Z0-9_:]*). Sadly, delimiting with {} as these already mark the boundaries of the special rendering...
Note that these values can be prepare with javascript in the theme by using a calculatedTag
| name | default | description |
|---|---|---|
| targetLayer | undefined | The id of the layer where this point should end up. This is not very strict, it will simply result in checking that this layer is shown preventing possible duplicate elements |
| tags | undefined | The tags to add onto the new object - see specification above |
| text | Import this data into OpenStreetMap | The text to show on the button |
| icon | ./assets/svg/addSmall.svg | A nice icon to show in the button |
| minzoom | 18 | How far the contributor must zoom in before being able to import the point |
| Snap onto layer(s)/replace geometry with this other way | undefined | - If the value corresponding with this key starts with 'way/' and the feature is a LineString or Polygon, the original OSM-way geometry will be changed to match the new geometry |
- If a way of the given layer(s) is closeby, will snap the new point onto this way (similar as preset might snap). To show multiple layers to snap onto, use a
;-seperated list snap max distance | 5 | The maximum distance that this point will move to snap onto a layer (in meters)
Example usage
{import_button(,,Import this data into OpenStreetMap,./assets/svg/addSmall.svg,18,,5)}
multi_apply
A button to apply the tagging of this object onto a list of other features. This is an advanced feature for which you'll need calculatedTags
| name | default | description |
|---|---|---|
| feature_ids | undefined | A JSOn-serialized list of IDs of features to apply the tagging on |
| keys | undefined | One key (or multiple keys, seperated by ';') of the attribute that should be copied onto the other features. |
| text | undefined | The text to show on the button |
| autoapply | undefined | A boolean indicating wether this tagging should be applied automatically if the relevant tags on this object are changed. A visual element indicating the multi_apply is still shown |
| overwrite | undefined | If set to 'true', the tags on the other objects will always be overwritten. The default behaviour will be to only change the tags on other objects if they are either undefined or had the same value before the change |
Example usage
{multi_apply(_features_with_the_same_name_within_100m, name:etymology:wikidata;name:etymology, Apply etymology information on all nearby objects with the same name)}
tag_apply
Shows a big button; clicking this button will apply certain tags onto the feature.
The first argument takes a specification of which tags to add.
These can either be a tag to add, such as amenity=fast_food or can use a substitution, e.g. addr:housenumber=$number.
This new point will then have the tags amenity=fast_food and addr:housenumber with the value that was saved in number in the original feature.
If a value to substitute is undefined, empty string will be used instead.
This supports multiple values, e.g. ref=$source:geometry:type/$source:geometry:ref
Remark that the syntax is slightly different then expected; it uses '$' to note a value to copy, followed by a name (matched with [a-zA-Z0-9_:]*). Sadly, delimiting with {} as these already mark the boundaries of the special rendering...
Note that these values can be prepare with javascript in the theme by using a calculatedTag
| name | default | description |
|---|---|---|
| tags_to_apply | undefined | A specification of the tags to apply |
| message | undefined | The text to show to the contributor |
| image | undefined | An image to show to the contributor on the button |
| id_of_object_to_apply_this_one | undefined | If specified, applies the the tags onto another object. The id will be read from properties[id_of_object_to_apply_this_one] of the selected object. The tags are still calculated based on the tags of the selected element |
Example usage
{tag_apply(survey_date:=$_now:date, Surveyed today!)}
This document is autogenerated from UI/SpecialVisualisations.ts