356 lines
9.0 KiB
JavaScript
356 lines
9.0 KiB
JavaScript
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var carto = require('carto');
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var torque = require('torque.js');
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var Utils = require('builder/helpers/utils');
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var _ = require('underscore');
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var ERROR_REGEX = /.*:(\d+):(\d+)\s*(.*)/;
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var CartoParser = function (cartocss) {
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this.parse_env = null;
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this.ruleset = null;
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if (cartocss) {
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this.parse(cartocss);
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}
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};
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CartoParser.prototype = {
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// value due to torque
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RESERVED_VARIABLES: ['mapnik-geometry-type', 'points_density', 'points_count', 'src', 'value', 'agg_value', 'agg_value_density'],
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parse: function (cartocss) {
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this.parse_env = {
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validation_data: false,
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frames: [],
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errors: [],
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error: function (obj) {
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obj.line = carto.Parser().extractErrorLine(cartocss, obj.index);
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this.errors.push(obj);
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}
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};
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var self = this;
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var ruleset = null;
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var defs = null;
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try {
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// set default reference
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carto.tree.Reference.setData(carto.default_reference.version.latest);
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ruleset = (new carto.Parser(this.parse_env)).parse(cartocss);
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} catch (e) {
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// add the style.mss string to match the response from the server
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this.parse_env.errors = this.parseError(['style\.mss' + e.message]);
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return;
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}
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if (ruleset) {
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var existing = {};
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var mapDef;
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var symbolizers;
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var i;
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var j;
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var r;
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this.definitions = defs = ruleset.toList(this.parse_env);
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for (i in defs) {
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if (defs[i].elements.length > 0) {
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if (defs[i].elements[0].value === 'Map') {
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mapDef = defs.splice(i, 1)[0];
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}
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}
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}
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symbolizers = torque.cartocss_reference.version.latest.layer;
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if (mapDef) {
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mapDef.rules.forEach(function (r) {
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var key = r.name;
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var type;
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var element;
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if (!(key in symbolizers)) {
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self.parse_env.error({
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message: 'Rule ' + key + ' not allowed for Map.',
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index: r.index
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});
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} else {
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type = symbolizers[r.name].type;
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element = r.value.value[0].value[0];
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if (!self._checkValidType(element, type)) {
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self.parse_env.error({
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message: 'Expected type ' + type + '.',
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index: r.index
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});
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}
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}
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});
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}
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defs = carto.inheritDefinitions(defs, this.parse_env);
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defs = carto.sortStyles(defs, this.parse_env);
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for (i in defs) {
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for (j in defs[i]) {
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r = defs[i][j];
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if (r && r.toXML) {
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r.toXML(this.parse_env, existing);
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}
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}
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}
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// toList uses parse_env.errors.message to put messages
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if (this.parse_env.errors.message) {
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_(this.parse_env.errors.message.split('\n')).each(function (m) {
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self.parse_env.errors.push(m);
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});
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}
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}
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this.ruleset = ruleset;
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return this;
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},
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_checkValidType: function (e, type) {
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if (['number', 'float'].indexOf(type) > -1) {
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return typeof e.value === 'number';
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} else if (type === 'string') {
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return e.value !== 'undefined' && typeof e.value === 'string';
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} else if (type.constructor === Array) {
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return type.indexOf(e.value) > -1 || e.value === 'linear';
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} else if (type === 'color') {
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return this._checkValidColor(e);
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}
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return true;
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},
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_checkValidColor: function (e) {
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var expectedArguments = {rgb: 3, hsl: 3, rgba: 4, hsla: 4};
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return typeof e.rgb !== 'undefined' || expectedArguments[e.name] === e.args;
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},
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/**
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* gets an array of parse errors from windshaft
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* and returns an array of {line:1, error: 'string'] with user friendly
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* strings. Parses errors in format:
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*
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* 'style.mss:7:2 Invalid code: asdasdasda'
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*
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* it could also get already parsed objects so we return them directly without parsing them again
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*/
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parseError: function (errors) {
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var parsedErrors = _.compact(errors).map(function (error) {
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if (_.isObject(error)) return error;
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var matchedError = error.match(ERROR_REGEX);
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return matchedError
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? { line: parseInt(matchedError[1], 10), message: matchedError[3] }
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: { line: null, message: error };
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});
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// sort by line
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parsedErrors.sort(function (a, b) { return a.line - b.line; });
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parsedErrors = _.uniq(parsedErrors, true, function (a) { return a.line + a.message; });
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return parsedErrors;
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},
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/**
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* return the error list, empty if there were no errors
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*/
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errors: function () {
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return this.parse_env ? this.parse_env.errors : [];
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},
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_colorsFromRule: function (rule) {
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function searchRecursiveByType (v, t) {
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var res = [];
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var i;
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var r;
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for (i in v) {
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if (v[i] instanceof t) {
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res.push(v[i]);
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} else if (typeof v[i] === 'object') {
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r = searchRecursiveByType(v[i], t);
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if (r.length) {
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res = res.concat(r);
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}
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}
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}
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return res;
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}
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return searchRecursiveByType(rule.ev(this.parse_env), carto.tree.Color);
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},
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_varsFromRule: function (rule) {
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function searchRecursiveByType (v, t) {
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var res = [];
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var i;
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var r;
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for (i in v) {
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if (v[i] instanceof t) {
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res.push(v[i]);
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} else if (typeof v[i] === 'object') {
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r = searchRecursiveByType(v[i], t);
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if (r.length) {
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res = res.concat(r);
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}
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}
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}
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return res;
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}
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return searchRecursiveByType(rule, carto.tree.Field);
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},
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/**
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* Extract information from the carto using the provided method.
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* */
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_extract: function (method, extractVariables) {
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var self = this;
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var columns = [];
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var definitions;
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var def;
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var d;
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var r;
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var f;
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var k;
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var rule;
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var columnList;
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var filter;
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var filter_key;
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if (this.ruleset) {
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definitions = this.ruleset.toList(this.parse_env);
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for (d in definitions) {
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def = definitions[d];
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if (def.filters) {
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// extract from rules
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for (r in def.rules) {
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rule = def.rules[r];
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columnList = method(this, rule);
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columns = columns.concat(columnList);
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}
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if (extractVariables) {
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for (f in def.filters) {
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filter = def.filters[f];
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for (k in filter) {
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filter_key = filter[k];
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if (filter_key.key && filter_key.key.value) {
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columns.push(filter_key.key.value);
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}
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}
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}
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}
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}
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}
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return _.reject(_.uniq(columns), function (v) {
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return _.contains(self.RESERVED_VARIABLES, v);
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});
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}
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},
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/**
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* return a list of colors used in cartocss
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*/
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colorsUsed: function (opt) {
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// extraction method
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var method = function (self, rule) {
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var colors = self._colorsFromRule(rule);
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return _.map(colors, function (color) {
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return color.rgb;
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});
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};
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var colors = this._extract(method, false);
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if (opt && opt.mode === 'hex') {
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colors = _.map(colors, function (color) {
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return Utils.rgbToHex(color[0], color[1], color[2]);
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});
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}
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return colors;
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},
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colorsUsedForLegend: function (opt) {
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var rules = this.getDefaultRules();
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if (rules['image-filters']) {
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var method = function (self, rule) {
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var imageFillRule = rules['image-filters'];
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var colors = self._colorsFromRule(imageFillRule);
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return _.map(colors, function (f) {
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return f.rgb;
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});
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};
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var colors = this._extract(method, true);
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if (opt && opt.mode === 'hex') {
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colors = _.map(colors, function (color) {
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return Utils.rgbToHex(color[0], color[1], color[2]);
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});
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}
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}
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return _.map(colors, function (color) {
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return { color: color };
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});
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},
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/**
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* return a list of variables used in cartocss
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*/
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variablesUsed: function () {
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// extraction method
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var method = function (self, rule) {
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return _.map(self._varsFromRule(rule), function (f) {
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return f.value;
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});
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};
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return this._extract(method, true);
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},
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/**
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* returns the default layer
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*/
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getDefaultRules: function () {
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var rules = [];
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var i;
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var def;
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var rulesMap = {};
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for (i = 0; i < this.definitions.length; ++i) {
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def = this.definitions[i];
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// all zooms and default attachment so we don't get conditional variables
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if (def.zoom === 8388607 && _.size(def.filters.filters) === 0 && def.attachment === '__default__') {
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rules = rules.concat(def.rules);
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}
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}
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for (i in rules) {
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var rule = rules[i];
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rulesMap[rule.name] = rule;
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}
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return rulesMap;
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},
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getRuleByName: function (definition, ruleName) {
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if (!definition._rulesByName) {
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var rulesMap = definition._rulesByName = {};
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for (var r in definition.rules) {
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var rule = definition.rules[r];
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rulesMap[rule.name] = rule;
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}
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}
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return definition._rulesByName[ruleName];
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}
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};
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module.exports = CartoParser;
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