Expose mapbox minzoom, maxzoom, and symbol-placement properties

Author: rockg

src/plots/mapbox/layers.js

@@ -97,6 +97,8 @@ proto.updateLayer = function(opts) {
             source: this.idSource,
             'source-layer': opts.sourcelayer || '',
             type: opts.type,
+            minzoom: opts.minzoom,
+            maxzoom: opts.maxzoom,
             layout: convertedOpts.layout,
             paint: convertedOpts.paint
         }, opts.below);
@@ -176,7 +178,8 @@ function convertOpts(opts) {
                 'text-field': symbol.text,
                 'text-size': symbol.textfont.size,
                 'text-anchor': textOpts.anchor,
-                'text-offset': textOpts.offset
+                'text-offset': textOpts.offset,
+                'symbol-placement': symbol.placement,
 
                 // TODO font family
                 // 'text-font': symbol.textfont.family.split(', '),

src/plots/mapbox/layout_attributes.js

@@ -175,6 +175,28 @@ var attrs = module.exports = overrideAll({
             role: 'info',
             description: 'Sets the opacity of the layer.'
         },
+        minzoom: {
+            valType: 'number',
+            min: 0,
+            max: 24,
+            dflt: 0,
+            role: 'info',
+            description: [
+                'Sets the minimum zoom level.',
+                'At zoom levels less than the minzoom, the layer will be hidden.'
+            ].join(' ')
+        },
+        maxzoom: {
+            valType: 'number',
+            min: 0,
+            max: 24,
+            dflt: 24,
+            role: 'info',
+            description: [
+                'Sets the maximum zoom level.',
+                'At zoom levels equal to or greater than the maxzoom, the layer will be hidden.'
+            ].join(' ')
+        },
 
         // type-specific style attributes
         circle: {
@@ -240,6 +262,18 @@ var attrs = module.exports = overrideAll({
                     'Sets the symbol text.'
                 ].join(' ')
             },
+            placement: {
+                valType: 'enumerated',
+                values: ['point', 'line', 'line-center'],
+                dflt: 'point',
+                role: 'info',
+                description: [
+                    'Sets the symbol placement.',
+                    'If `placement` is *point*, the label is placed where the geometry is located',
+                    'If `placement` is *line*, the label is placed along the line of the geometry',
+                    'If `placement` is *line-center*, the label is placed on the center of the geometry',
+                ].join(' ')
+            },
             textfont: fontAttr,
             textposition: Lib.extendFlat({}, textposition, { arrayOk: false })
         }

src/plots/mapbox/layout_defaults.js

@@ -62,6 +62,8 @@ function handleLayerDefaults(layerIn, layerOut) {
         coerce('below');
         coerce('color');
         coerce('opacity');
+        coerce('minzoom');
+        coerce('maxzoom');
 
         if(type === 'circle') {
             coerce('circle.radius');
@@ -82,6 +84,7 @@ function handleLayerDefaults(layerIn, layerOut) {
             coerce('symbol.text');
             Lib.coerceFont(coerce, 'symbol.textfont');
             coerce('symbol.textposition');
+            coerce('symbol.placement');
         }
     }
 }