Merge

CHANGELOG.md

@@ -1,5 +1,14 @@
 ## Changelog
 
+## 0.9.0
+
+* Adds the modulus operator `%` as an option
+* Adds a new field-type like `[FIELD]` instead of "[FIELD"
+
+### 0.8.0
+
+* Supports function syntax for transforms, optionally with variables and arguments.
+
 ### 0.7.0
 
 * Support an `opacity` property on any style that is a style-level property

bin/carto

@@ -2,7 +2,7 @@
 
 var path = require('path'),
     fs = require('fs'),
-    sys = require('sys'),
+    util = require('util'),
     carto = require('carto');
 
 var args = process.argv.slice(1);
@@ -17,7 +17,7 @@ args = args.filter(function (arg) {
     switch (arg) {
         case 'v':
         case 'version':
-            sys.puts("carto " + carto.version.join('.') + " (Carto map stylesheet compiler)");
+            util.puts("carto " + carto.version.join('.') + " (Carto map stylesheet compiler)");
             process.exit(0);
             break;
         case 'b':
@@ -46,7 +46,7 @@ if (input && input[0] != '/') {
 }
 
 if (!input) {
-    sys.puts("carto: no input files");
+    util.puts("carto: no input files");
     process.exit(1);
 }
 
@@ -57,14 +57,14 @@ if (options.benchmark) {
 try {
     var data = fs.readFileSync(input, 'utf-8');
 } catch(err) {
-    sys.puts("carto: " + err.message.replace(/^[A-Z]+, /, ''));
+    util.puts("carto: " + err.message.replace(/^[A-Z]+, /, ''));
     process.exit(1);
 }
 
 try {
     data = JSON.parse(data);
 } catch(err) {
-    sys.puts("carto: " + err.message.replace(/^[A-Z]+, /, ''));
+    util.puts("carto: " + err.message.replace(/^[A-Z]+, /, ''));
     process.exit(1);
 }
 
@@ -98,7 +98,7 @@ function compile(err, data) {
                 process.exit(1);
             } else {
                 if (!options.benchmark) {
-                    sys.puts(output);
+                    util.puts(output);
                 } else {
                     var duration = (+new Date) - start;
                     console.log('TOTAL: ' + (duration) + 'ms');
@@ -107,9 +107,9 @@ function compile(err, data) {
         });
     } catch (e) {
         if (e.stack) {
-            sys.error(e.stack);
+            util.error(e.stack);
         } else {
-            sys.error(e);
+            util.error(e);
         }
     }
 };

lib/carto/functions.js

@@ -94,6 +94,13 @@ tree.functions = {
 
         return hsla(hsl);
     },
+    replace: function (entity, a, b) {
+        if (entity.is === 'field') {
+            return entity.toString + '.replace(' + a.toString() + ', ' + b.toString() + ')';
+        } else {
+            return entity.replace(a, b);
+        }
+    },
     //
     // Copyright (c) 2006-2009 Hampton Catlin, Nathan Weizenbaum, and Chris Eppstein
     // http://sass-lang.com
@@ -126,7 +133,7 @@ tree.functions = {
                      .replace(/%[da]/, args[i].toString());
         }
         str = str.replace(/%%/g, '%');
-        return new tree.Quoted('"' + str + '"', str);
+        return new tree.Quoted(str);
     }
 };
 

lib/carto/index.js

@@ -50,9 +50,9 @@ var carto = {
     }
 };
 
-[ 'anonymous', 'call', 'color', 'comment', 'definition', 'dimension',
+[ 'call', 'color', 'comment', 'definition', 'dimension',
-  'directive', 'element', 'expression', 'filterset', 'filter',
+  'directive', 'element', 'expression', 'filterset', 'filter', 'field',
-  'keyword', 'layer', 'operation', 'quoted', 'imagefilter',
+  'keyword', 'layer', 'literal', 'operation', 'quoted', 'imagefilter',
   'reference', 'rule', 'ruleset', 'selector', 'style', 'url', 'value',
   'variable', 'zoom', 'invalid', 'fontset'
 ].forEach(function(n) {

lib/carto/parser.js

@@ -419,10 +419,24 @@ carto.Parser = function Parser(env) {
                     if (input.charAt(i) !== '"' && input.charAt(i) !== "'") return;
                     var str = $(/^"((?:[^"\\\r\n]|\\.)*)"|'((?:[^'\\\r\n]|\\.)*)'/);
                     if (str) {
-                        return new tree.Quoted(str[0], str[1] || str[2]);
+                        return new tree.Quoted(str[1] || str[2]);
                     }
                 },
 
+                // A reference to a Mapnik field, like
+                //
+                //     [NAME]
+                //
+                // Behind the scenes, this has the same representation, but Carto
+                // needs to be careful to warn when unsupported operations are used.
+                field: function() {
+                    if (! $('[')) return;
+                    var field_name = $(/(^[a-zA-Z0-9\-_]+)/);
+                    if (! $(']')) return;
+                    if (field_name) return new tree.Field(field_name[1]);
+                },
+
+                // This is a comparison operator
                 comparison: function() {
                     var str = $(/^=~|=|!=|<=|>=|<|>/);
                     if (str) {
@@ -449,7 +463,7 @@ carto.Parser = function Parser(env) {
                 call: function() {
                     var name, args;
 
-                    if (! (name = /^([\w-]+|%)\(/.exec(chunks[j]))) return;
+                    if (! (name = /^([\w\-]+|%)\(/.exec(chunks[j]))) return;
 
                     name = name[1].toLowerCase();
 
@@ -467,13 +481,15 @@ carto.Parser = function Parser(env) {
                         return new tree.Call(name, args, i); 
                     }
                 },
-                arguments: function() {
+                // Arguments are comma-separated expressions
+                'arguments': function() {
                     var args = [], arg;
 
                     while (arg = $(this.expression)) {
                         args.push(arg);
                         if (! $(',')) { break; }
                     }
+
                     return args;
                 },
                 literal: function() {
@@ -497,7 +513,7 @@ carto.Parser = function Parser(env) {
                         return new tree.Invalid(value, memo, 'Missing closing ) in URL.');
                     } else {
                         return new tree.URL((value.value || value instanceof tree.Variable) ?
-                            value : new tree.Anonymous(value), imports.paths);
+                            value : new tree.Quoted(value), imports.paths);
                     }
                 },
 
@@ -553,7 +569,9 @@ carto.Parser = function Parser(env) {
             variable: function() {
                 var name;
 
-                if (input.charAt(i) === '@' && (name = $(/^(@[\w-]+)\s*:/))) { return name[1]; }
+                if (input.charAt(i) === '@' && (name = $(/^(@[\w-]+)\s*:/))) {
+                    return name[1];
+                }
             },
 
             //
@@ -561,8 +579,12 @@ carto.Parser = function Parser(env) {
             // and can be found inside a rule's value.
             //
             entity: function() {
-                return $(this.entities.literal) || $(this.entities.variable) || $(this.entities.url) ||
+                return $(this.entities.literal) ||
-                       $(this.entities.call) || $(this.entities.keyword);
+                    $(this.entities.field) ||
+                    $(this.entities.variable) ||
+                    $(this.entities.url) ||
+                    $(this.entities.call) ||
+                    $(this.entities.keyword);
             },
 
             //
@@ -743,6 +765,7 @@ carto.Parser = function Parser(env) {
                     return new tree.Value(expressions);
                 }
             },
+            // A sub-expression, contained by parenthensis
             sub: function() {
                 var e;
 
@@ -750,10 +773,12 @@ carto.Parser = function Parser(env) {
                     return e;
                 }
             },
+            // This is a misnomer because it actually handles multiplication
+            // and division.
             multiplication: function() {
                 var m, a, op, operation;
                 if (m = $(this.operand)) {
-                    while ((op = ($('/') || $('*'))) && (a = $(this.operand))) {
+                    while ((op = ($('/') || $('*') || $('%'))) && (a = $(this.operand))) {
                         operation = new tree.Operation(op, [operation || m, a], memo);
                     }
                     return operation || m;
@@ -773,9 +798,7 @@ carto.Parser = function Parser(env) {
             // An operand is anything that can be part of an operation,
             // such as a Color, or a Variable
             operand: function() {
-                return $(this.sub) || $(this.entities.dimension) ||
+                return $(this.sub) || $(this.entity);
-                       $(this.entities.color) || $(this.entities.variable) ||
-                       $(this.entities.call);
             },
 
             // Expressions either represent mathematical operations,

lib/carto/tree/call.js

@@ -1,8 +1,5 @@
 (function(tree) {
 
-//
-// A function call node.
-//
 tree.Call = function Call(name, args, index) {
     this.name = name;
     this.args = args;
@@ -50,9 +47,37 @@ tree.Call.prototype = {
                     value: 'undefined'
                 };
             }
-        } else { // 2.
+        } else {
-            return new tree.Anonymous(this.name +
+            var fn = tree.Reference.mapnikFunction(this.name);
-                   '(' + args.map(function(a) { return a.toString(); }).join(', ') + ')');
+            if (!fn) {
+                env.error({
+                    message: 'unknown function ' + this.name,
+                    index: this.index,
+                    type: 'runtime',
+                    filename: this.filename
+                });
+                return {
+                    is: 'undefined',
+                    value: 'undefined'
+                };
+            }
+            if (fn[1] !== args.length) {
+                env.error({
+                    message: 'function ' + this.name + ' takes ' +
+                        fn[1] + ' arguments and was given ' + args.length,
+                    index: this.index,
+                    type: 'runtime',
+                    filename: this.filename
+                });
+                return {
+                    is: 'undefined',
+                    value: 'undefined'
+                };
+            } else {
+                // Save the evaluated versions of arguments
+                this.args = args;
+                return this;
+            }
         }
     },
     toString: function(env) {

lib/carto/tree/comment.js

@@ -4,6 +4,7 @@ tree.Comment = function Comment(value, silent) {
     this.value = value;
     this.silent = !!silent;
 };
+
 tree.Comment.prototype = {
     toString: function(env) {
         return '<!--' + this.value + '-->';

lib/carto/tree/dimension.js

@@ -25,7 +25,7 @@ tree.Dimension.prototype = {
         return new tree.Color([this.value, this.value, this.value]);
     },
     toString: function() {
-        return this.value;
+        return this.value.toString();
     },
 
     // In an operation between two Dimensions,

lib/carto/tree/field.js

@@ -0,0 +1,17 @@
+(function(tree) {
+
+tree.Field = function Field(content) {
+    this.value = content || '';
+    this.is = 'field';
+};
+
+tree.Field.prototype = {
+    toString: function() {
+        return '[' + this.value + ']';
+    },
+    'eval': function() {
+        return this;
+    }
+};
+
+})(require('../tree'));

lib/carto/tree/literal.js

@@ -0,0 +1,20 @@
+// A literal is a literal string for Mapnik - the
+// result of the combination of a `tree.Field` with any
+// other type.
+(function(tree) {
+
+tree.Literal = function Field(content) {
+    this.value = content || '';
+    this.is = 'field';
+};
+
+tree.Literal.prototype = {
+    toString: function() {
+        return this.value;
+    },
+    'eval': function() {
+        return this;
+    }
+};
+
+})(require('../tree'));

lib/carto/tree/operation.js

@@ -1,11 +1,12 @@
 (function(tree) {
 
-
 tree.Operation = function Operation(op, operands, index) {
     this.op = op.trim();
     this.operands = operands;
     this.index = index;
+    this.is = 'operation';
 };
+
 tree.Operation.prototype.eval = function(env) {
     var a = this.operands[0].eval(env),
         b = this.operands[1].eval(env),
@@ -30,9 +31,11 @@ tree.Operation.prototype.eval = function(env) {
         }
     }
 
-    if (a instanceof tree.Quoted || b instanceof tree.Quoted) {
+    // Only concatenate plain strings, because this is easily
+    // pre-processed
+    if (a instanceof tree.Quoted && b instanceof tree.Quoted && this.op !== '+') {
         env.error({
-           message: 'One cannot add, subtract, divide, or multiply strings.',
+           message: "Can't subtract, divide, or multiply strings.",
            index: this.index,
            type: 'runtime',
            filename: this.filename
@@ -43,6 +46,25 @@ tree.Operation.prototype.eval = function(env) {
         };
     }
 
+    // Fields, literals, dimensions, and quoted strings can be combined.
+    if (a instanceof tree.Field || b instanceof tree.Field ||
+        a instanceof tree.Literal || b instanceof tree.Literal) {
+        if (a.is === 'color' || b.is === 'color') {
+            env.error({
+               message: "Can't subtract, divide, or multiply colors in expressions.",
+               index: this.index,
+               type: 'runtime',
+               filename: this.filename
+            });
+            return {
+                is: 'undefined',
+                value: 'undefined'
+            };
+        } else {
+            return new tree.Literal(a.eval(env).toString(true) + this.op + b.eval(env).toString(true));
+        }
+    }
+
     return a.operate(this.op, b);
 };
 
@@ -51,6 +73,7 @@ tree.operate = function(op, a, b) {
         case '+': return a + b;
         case '-': return a - b;
         case '*': return a * b;
+        case '%': return a % b;
         case '/': return a / b;
     }
 };

lib/carto/tree/quoted.js

@@ -1,17 +1,23 @@
 (function(tree) {
 
-tree.Quoted = function Quoted(str, content) {
+tree.Quoted = function Quoted(content) {
     this.value = content || '';
-    this.quote = str.charAt(0);
     this.is = 'string';
 };
+
 tree.Quoted.prototype = {
     toString: function(quotes) {
         var xmlvalue = this.value.replace(/\'/g, ''');
         return (quotes === true) ? "'" + xmlvalue + "'" : this.value;
     },
+
     'eval': function() {
         return this;
+    },
+
+    operate: function(op, other) {
+        return new tree.Quoted(true,
+            tree.operate(op, this.toString(), other.toString(this.contains_field)));
     }
 };
 

lib/carto/tree/reference.js

@@ -1,3 +1,9 @@
+/*
+ * Carto pulls in a reference from the `mapnik-reference`
+ * module. This file builds indexes from that file for its various
+ * options, and provides validation methods for property: value
+ * combinations.
+ */
 (function(tree) {
 
 var _ = require('underscore');
@@ -59,6 +65,24 @@ tree.Reference.symbolizer = function(selector) {
     }
 };
 
+/*
+ * For transform properties and image-filters,
+ * mapnik has its own functions.
+ */
+tree.Reference.mapnikFunction = function(name) {
+    var functions = [];
+    for (var i in tree.Reference.data.symbolizers) {
+        for (var j in tree.Reference.data.symbolizers[i]) {
+            if (tree.Reference.data.symbolizers[i][j].type === 'functions') {
+                functions = functions.concat(tree.Reference.data.symbolizers[i][j].functions);
+            }
+        }
+    }
+    return _.find(functions, function(f) {
+        return f[0] === name;
+    });
+};
+
 tree.Reference.requiredPropertyList = function(symbolizer_name) {
     if (this.required_prop_list_cache[symbolizer_name]) {
         return this.required_prop_list_cache[symbolizer_name];
@@ -101,28 +125,30 @@ tree.Reference.isFont = function(selector) {
 
 tree.Reference.validValue = function(env, selector, value) {
     var i, j;
-    if (value[0]) {
+    // TODO: handle in reusable way
-        return tree.Reference.selector(selector).type == value[0].is;
+    if (!tree.Reference.selector(selector)) {
-    } else {
+        return false;
-        // TODO: handle in reusable way
+    } else if (value.value[0].is == 'keyword') {
-        if (!tree.Reference.selector(selector)) {
+        return tree.Reference
-            return false;
+            .selector(selector).type
-        } else if (value.value[0].is == 'keyword') {
+            .indexOf(value.value[0].value) !== -1;
-            return tree.Reference
+    } else if (value.value[0].is == 'undefined') {
-                .selector(selector).type
+        // caught earlier in the chain - ignore here so that
-                .indexOf(value.value[0].value) !== -1;
+        // error is not overridden
-        } else if (value.value[0].is == 'undefined') {
+        return true;
-            // caught earlier in the chain - ignore here so that
+    } else if (tree.Reference.selector(selector).type == 'numbers') {
-            // error is not overridden
+        for (i in value.value) {
-            return true;
+            if (value.value[i].is !== 'float') {
-        } else if (tree.Reference.selector(selector).type == 'numbers') {
+                return false;
-            for (i in value.value) {
-                if (value.value[i].is !== 'float') {
-                    return false;
-                }
             }
+        }
+        return true;
+    } else if (tree.Reference.selector(selector).type == 'functions') {
+        // For backwards compatibility, you can specify a string for `functions`-compatible
+        // values, though they will not be validated.
+        if (value.value[0].is === 'string') {
             return true;
-        } else if (tree.Reference.selector(selector).type == 'functions') {
+        } else {
             for (i in value.value) {
                 for (j in value.value[i].value) {
                     if (value.value[i].value[j].is !== 'call') {
@@ -139,22 +165,24 @@ tree.Reference.validValue = function(env, selector, value) {
                 }
             }
             return true;
-        } else {
+        }
-            if (tree.Reference.selector(selector).validate) {
+    } else if (tree.Reference.selector(selector).type == 'expression') {
-                var valid = false;
+        return true;
-                for (i = 0; i < value.value.length; i++) {
+    } else {
-                    if (tree.Reference.selector(selector).type == value.value[i].is &&
+        if (tree.Reference.selector(selector).validate) {
-                        tree.Reference
+            var valid = false;
-                            ._validateValue
+            for (i = 0; i < value.value.length; i++) {
-                                [tree.Reference.selector(selector).validate]
+                if (tree.Reference.selector(selector).type == value.value[i].is &&
-                                (env, value.value[i].value)) {
+                    tree.Reference
-                        return true;
+                        ._validateValue
-                    }
+                            [tree.Reference.selector(selector).validate]
+                            (env, value.value[i].value)) {
+                    return true;
                 }
-                return valid;
-            } else {
-                return tree.Reference.selector(selector).type == value.value[0].is;
             }
+            return valid;
+        } else {
+            return tree.Reference.selector(selector).type == value.value[0].is;
         }
     }
 };

package.json

@@ -36,7 +36,7 @@
   },
   "dependencies": {
     "underscore": "~1.3.3",
-    "mapnik-reference": "~2.1.0",
+    "mapnik-reference": "https://github.com/mapnik/mapnik-reference/tarball/transform-functions",
     "xml2js": "~0.1.13"
   },
   "devDependencies": {

test/rendering/building_height.mml

@@ -0,0 +1,23 @@
+{
+    "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+    "Stylesheet": [
+        "building_height.mss"
+    ],
+    "Layer": [{
+        "name": "world",
+        "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+        "Datasource": {
+            "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip",
+            "type": "shape"
+        }
+    },
+    {
+        "class": "new",
+        "name": "countries",
+        "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+        "Datasource": {
+            "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip",
+            "type": "shape"
+        }
+    }]
+}

test/rendering/building_height.mss

@@ -0,0 +1,4 @@
+@n: 4;
+#world {
+    building-height: 2 * 3 * [HEIGHT] + 2 + [NOTHEIGHT] + (@n * 2);
+}

test/rendering/building_height.result

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE Map[]>
+<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34">
+
+
+<Style name="world" filter-mode="first" >
+  <Rule>
+    <BuildingSymbolizer height="6*[HEIGHT]+2+[NOTHEIGHT]+8" />
+  </Rule>
+</Style>
+<Layer name="world"
+  srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
+    <StyleName>world</StyleName>
+    <Datasource>
+       <Parameter name="file"><![CDATA[[absolute path]]]></Parameter>
+       <Parameter name="type"><![CDATA[shape]]></Parameter>
+    </Datasource>
+  </Layer>
+
+</Map>

test/rendering/field.mml

@@ -0,0 +1,23 @@
+{
+    "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+    "Stylesheet": [
+        "field.mss"
+    ],
+    "Layer": [{
+        "name": "world",
+        "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+        "Datasource": {
+            "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip",
+            "type": "shape"
+        }
+    },
+    {
+        "class": "new",
+        "name": "countries",
+        "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+        "Datasource": {
+            "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip",
+            "type": "shape"
+        }
+    }]
+}

test/rendering/field.mss

@@ -0,0 +1,6 @@
+#world {
+  text-name: "hello " + [NAME] + " hello";
+  text-size: 11;
+  text-face-name: "Georgia Regular", "Arial Italic";
+}
+

test/rendering/field.result

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE Map[]>
+<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34">
+
+<FontSet name="fontset-0">
+  <Font face-name="Georgia Regular"/>
+  <Font face-name="Arial Italic"/>
+</FontSet>
+<Style name="world" filter-mode="first" >
+  <Rule>
+    <TextSymbolizer size="11" fontset-name="fontset-0" ><![CDATA['hello '+[NAME]+' hello']]></TextSymbolizer>
+  </Rule>
+</Style>
+<Layer name="world"
+  srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
+    <StyleName>world</StyleName>
+    <Datasource>
+       <Parameter name="file"><![CDATA[[absolute path]]]></Parameter>
+       <Parameter name="type"><![CDATA[shape]]></Parameter>
+    </Datasource>
+  </Layer>
+
+</Map>

test/rendering/field_advanced.mml

@@ -0,0 +1,23 @@
+{
+    "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+    "Stylesheet": [
+        "field_advanced.mss"
+    ],
+    "Layer": [{
+        "name": "world",
+        "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+        "Datasource": {
+            "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip",
+            "type": "shape"
+        }
+    },
+    {
+        "class": "new",
+        "name": "countries",
+        "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+        "Datasource": {
+            "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip",
+            "type": "shape"
+        }
+    }]
+}

test/rendering/field_advanced.mss

@@ -0,0 +1,6 @@
+#world {
+  text-name: "hello " + [NAME] + " hello" + 2;
+  text-size: 11;
+  text-face-name: "Georgia Regular", "Arial Italic";
+}
+

test/rendering/field_advanced.result

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE Map[]>
+<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34">
+
+<FontSet name="fontset-0">
+  <Font face-name="Georgia Regular"/>
+  <Font face-name="Arial Italic"/>
+</FontSet>
+<Style name="world" filter-mode="first" >
+  <Rule>
+    <TextSymbolizer size="11" fontset-name="fontset-0" ><![CDATA['hello '+[NAME]+' hello'+2]]></TextSymbolizer>
+  </Rule>
+</Style>
+<Layer name="world"
+  srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
+    <StyleName>world</StyleName>
+    <Datasource>
+       <Parameter name="file"><![CDATA[[absolute path]]]></Parameter>
+       <Parameter name="type"><![CDATA[shape]]></Parameter>
+    </Datasource>
+  </Layer>
+
+</Map>

test/rendering/modulus.mml

@@ -0,0 +1,23 @@
+{
+    "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+    "Stylesheet": [
+        "modulus.mss"
+    ],
+    "Layer": [{
+        "name": "world",
+        "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+        "Datasource": {
+            "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip",
+            "type": "shape"
+        }
+    },
+    {
+        "class": "new",
+        "name": "countries",
+        "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+        "Datasource": {
+            "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip",
+            "type": "shape"
+        }
+    }]
+}

test/rendering/modulus.mss

@@ -0,0 +1,6 @@
+#world {
+  text-name: "hello ";
+  text-size: 11 % 2;
+  text-face-name: "Georgia Regular", "Arial Italic";
+}
+

test/rendering/modulus.result

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE Map[]>
+<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34">
+
+<FontSet name="fontset-0">
+  <Font face-name="Georgia Regular"/>
+  <Font face-name="Arial Italic"/>
+</FontSet>
+<Style name="world" filter-mode="first" >
+  <Rule>
+    <TextSymbolizer size="1" fontset-name="fontset-0" ><![CDATA[hello ]]></TextSymbolizer>
+  </Rule>
+</Style>
+<Layer name="world"
+  srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
+    <StyleName>world</StyleName>
+    <Datasource>
+       <Parameter name="file"><![CDATA[[absolute path]]]></Parameter>
+       <Parameter name="type"><![CDATA[shape]]></Parameter>
+    </Datasource>
+  </Layer>
+
+</Map>

test/rendering/transforms.mss

@@ -0,0 +1,5 @@
+@trans: 2;
+#world {
+  point-file: url(foo.png);
+  point-transform: translate(@trans * 2, @trans);
+}

test/rendering/transforms.result

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE Map[]>
+<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34">
+
+
+<Style name="world" filter-mode="first" >
+  <Rule>
+    <PointSymbolizer file="foo.png" image-transform="translate(4,2)" />
+  </Rule>
+</Style>
+<Layer name="world"
+  srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
+    <StyleName>world</StyleName>
+    <Datasource>
+       <Parameter name="file"><![CDATA[[absolute path]]]></Parameter>
+       <Parameter name="type"><![CDATA[shape]]></Parameter>
+    </Datasource>
+  </Layer>
+
+</Map>

test/rendering/transforms_backwards.mml

@@ -0,0 +1,14 @@
+{
+    "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+    "Stylesheet": [
+        "transforms_backwards.mss"
+    ],
+    "Layer": [{
+        "name": "world",
+        "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+        "Datasource": {
+            "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip",
+            "type": "shape"
+        }
+    }]
+}

test/rendering/transforms_backwards.mss

@@ -0,0 +1,4 @@
+#world {
+  point-file: url(foo.png);
+  point-transform: "translate(2, 2)";
+}

test/rendering/transforms_backwards.result

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE Map[]>
+<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34">
+
+
+<Style name="world" filter-mode="first" >
+  <Rule>
+    <PointSymbolizer file="foo.png" image-transform="translate(2, 2)" />
+  </Rule>
+</Style>
+<Layer name="world"
+  srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
+    <StyleName>world</StyleName>
+    <Datasource>
+       <Parameter name="file"><![CDATA[[absolute path]]]></Parameter>
+       <Parameter name="type"><![CDATA[shape]]></Parameter>
+    </Datasource>
+  </Layer>
+
+</Map>

test/rendering/transforms_field.mml

@@ -0,0 +1,14 @@
+{
+    "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+    "Stylesheet": [
+        "transforms_field.mss"
+    ],
+    "Layer": [{
+        "name": "world",
+        "srs": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over",
+        "Datasource": {
+            "file": "http://tilemill-data.s3.amazonaws.com/test_data/shape_demo.zip",
+            "type": "shape"
+        }
+    }]
+}

test/rendering/transforms_field.mss

@@ -0,0 +1,4 @@
+#world {
+  point-file:url(foo.png);
+  point-transform: scale(2 * 5 * [POP2005], [POP2005]);
+}

test/rendering/transforms_field.result

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE Map[]>
+<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34">
+
+
+<Style name="world" filter-mode="first" >
+  <Rule>
+    <PointSymbolizer file="foo.png" image-transform="scale(10*[POP2005],[POP2005])" />
+  </Rule>
+</Style>
+<Layer name="world"
+  srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
+    <StyleName>world</StyleName>
+    <Datasource>
+       <Parameter name="file"><![CDATA[[absolute path]]]></Parameter>
+       <Parameter name="type"><![CDATA[shape]]></Parameter>
+    </Datasource>
+  </Layer>
+
+</Map>