formatUnits: configure options

lang/en.json

@@ -20,6 +20,10 @@
     "filter:type": "Type",
     "formatUnits:coordFormat": "Coordinate format",
     "formatUnits:coordSpacer": "Coordinate spacer",
+    "formatUnits:system": "Unit system",
+    "formatUnits:system:si": "SI Units",
+    "formatUnits:system:imp": "Imperial units",
+    "formatUnits:system:m": "Always meter",
     "form_element:please_select": "-- please select --",
     "geoinfo:nw-corner": "Northwestern corner",
     "geoinfo:center": "Center",

src/formatUnits.js

@@ -2,15 +2,65 @@ const formatUnit = require('format-unit').default
 const formatcoords = require('formatcoords')
 
 const defaults = {
+  coordFormat: 'FFf',
+  coordSpacer: ', ',
+  system: 'si'
+}
+
+const distanceUnits = {
+  si: ['cm', 'm', 'km'],
+  imp: ['in', 'ft', 'yd', 'mi'],
+  m: 'm'
+}
+
+const areaUnits = {
+  si: ['cm2', 'm2', 'ha', 'km2'],
+  imp: ['in2', 'ft2', 'yd2', 'ar', 'mi2'],
+  m: 'm2'
 }
 
 module.exports = {
-  distance: value => formatUnit('length')(value)(['mm', 'cm', 'm', 'km']),
-  area: value => formatUnit('area')(value)(['cm2', 'm2', 'ha', 'km2']),
-  coord: value => formatcoords(value).format()
+  distance: value => formatUnit('length')(value)(distanceUnits[global.options.formatUnitsSystem || defaults.system]),
+  area: value => formatUnit('area')(value)(areaUnits[global.options.formatUnitsSystem || defaults.system]),
+  coord: value => formatcoords(value).format(global.options.formatUnitsCoordFormat || defaults.coordFormat, {
+    latLonSeparator: global.options.formatUnitsCoordSpacer || defaults.coordSpacer
+  })
 }
 
 register_hook('options_form', def => {
+  def.formatUnitsSystem = {
+    'name': lang('formatUnits:coordFormat'),
+    'type': 'select',
+    'values': {
+      'si': lang('formatUnits:system:si'),
+      'imp': lang('formatUnits:system:imp'),
+      'm': lang('formatUnits:system:m'),
+    },
+    'default': defaults.system
+  }
+
+  def.formatUnitsCoordFormat = {
+    'name': lang('formatUnits:coordFormat'),
+    'desc': 'A format definition as specified in <a target="_blank" href="https://github.com/nerik/formatcoords">module formatCoords</a>',
+    'type': 'select_other',
+    'values': {
+      'FFf': 'DD° MM′ SS.SSS″ X',
+      'Ff': 'DD° MM.MMM′ X',
+      'f': 'DD.DDD° X',
+      'd': '±DD.DDD'
+    },
+    'default': defaults.coordFormat
+  }
+
+  def.formatUnitsCoordSpacer = {
+    'name': lang('formatUnits:coordSpacer'),
+    'type': 'select_other',
+    'values': {
+      ' ': 'Space',
+      ', ': 'Colon'
+    },
+    'default': defaults.coordSpacer
+  }
 })
 
 register_hook('options_save', def => {