/// <summary>
/// Sort styles by the minimum index of their rules.
/// This sorts a slice of the styles, so it returns a sorted
/// array but does not change the input.
/// </summary>
/// <param name="styles"></param>
/// <param name="env"></param>
private static void SortStyles(List <CartoStyle> styles, Env env)
{
if (styles.Count == 0)
{
return;
}
for (var i = 0; i < styles.Count; i++)
{
CartoStyle style = styles[i];
style.Index = int.MaxValue;
for (int b = 0; b < style.Count; b++)
{
NodeList <CartoRule> rules = style[b].Rules;
for (var r = 0; r < rules.Count; r++)
{
CartoRule rule = rules[r];
if (rule.Index < style.Index)
{
style.Index = rule.Index;
}
}
}
}
styles.Sort(delegate(CartoStyle a, CartoStyle b) { return(a.Index.CompareTo(b.Index)); });
}
/// <summary>
/// Apply inherited styles from their ancestors to them.
/// </summary>
/// <param name="definitions"></param>
/// <param name="env"></param>
/// <returns>an array of arrays is returned, in which each array refers to a specific attachment</returns>
private static List <CartoStyle> InheritDefinitions(List <CartoDefinition> definitions, Env env)
{
// definitions are ordered by specificity,
// high (index 0) to low
Dictionary <string, CartoStyle> byAttachment = new Dictionary <string, CartoStyle>();
Dictionary <string, SortedDictionary <string, CartoDefinition> > byFilter = new Dictionary <string, SortedDictionary <string, CartoDefinition> >();
List <CartoStyle> result = new List <CartoStyle>();
List <CartoDefinition> current;
string attachment;
// Evaluate the filters specified by each definition with the given
// environment to correctly resolve variable references
definitions.ForEach(delegate(CartoDefinition def) {
def.Filters.Evaluate(env);
});
current = new List <CartoDefinition>();
for (int i = 0; i < definitions.Count; i++)
{
CartoDefinition defI = definitions[i];
attachment = defI.Attachment;
current.Clear();
current.Add(defI);
if (!byAttachment.ContainsKey(attachment))
{
CartoStyle style = new CartoStyle();
style.Attachment = attachment;
byAttachment.Add(attachment, style);
byAttachment[attachment].Attachment = attachment;
byFilter[attachment] = new SortedDictionary <string, CartoDefinition>();
result.Add(byAttachment[attachment]);
}
// Iterate over all subsequent rules.
for (var j = i + 1; j < definitions.Count; j++)
{
CartoDefinition defJ = definitions[j];
if (defJ.Attachment == attachment)
{
// Only inherit rules from the same attachment.
current = AddRules(current, defJ, byFilter[attachment], env);
}
}
for (var k = 0; k < current.Count; k++)
{
byFilter[attachment][current[k].Filters.ToString()] = current[k];
byAttachment[attachment].Add(current[k]);
}
}
return(result);
}
public static Map ReadFromFile(string fileContent, string fileName)
{
string path = Path.GetDirectoryName(fileName);
CartoProject cartoProject = null;
switch (Path.GetExtension(fileName).ToLower())
{
case ".mml":
cartoProject = JsonConvert.DeserializeObject <CartoProject>(fileContent);
if (cartoProject.Interactivity != null)
{
try
{
Dictionary <string, object> dict = JsonConvert.DeserializeObject <Dictionary <string, object> >(cartoProject.Interactivity.ToString());
cartoProject.Interactivity = dict;
}
catch
{ }
try
{
bool enabled = JsonConvert.DeserializeObject <bool>(cartoProject.Interactivity.ToString());
cartoProject.Interactivity = enabled;
}
catch
{ }
}
break;
case ".yaml":
using (StringReader input = new StringReader(fileContent))
{
Deserializer deserializer = new Deserializer(namingConvention: new CamelCaseNamingConvention(), ignoreUnmatched: true);
var parser = new MergingParser(new YamlDotNet.Core.Parser(input));
cartoProject = deserializer.Deserialize <CartoProject>(new EventReader(parser));
}
break;
default:
throw new Exception("Unknown extension of the CartoCSS project.");
}
Map map = null;
if (cartoProject.Stylesheet != null && cartoProject.Stylesheet.Length > 0 && cartoProject.Layers.Length > 0)
{
ICartoTranslator cartoTranslator = CartoGeneratorConverterFactory.CreateTranslator(cartoProject.Generator);
CartoParser parser = new CartoParser();
parser.NodeProvider = new CartoNodeProvider();
Env env = new Env();
List <Ruleset> ruleSets = new List <Ruleset>();
List <CartoDefinition> definitions = new List <CartoDefinition>();
foreach (string styleName in cartoProject.Stylesheet)
{
string styleFileName = Path.Combine(path, styleName);
try
{
Ruleset ruleSet = parser.Parse(File.ReadAllText(styleFileName), styleFileName, env);
ruleSets.Add(ruleSet);
// Get an array of Ruleset objects, flattened
// and sorted according to specificitySort
var defs = new List <CartoDefinition>();
defs = ruleSet.Flatten(defs, null, env);
defs.Sort(new SpecificitySorter());
definitions.AddRange(defs);
env.Frames.Push(ruleSet);
}
catch (Exception ex)
{
Exception ex2 = new IOException(string.Format("An error occured during parsing of the style '{0}'.", styleFileName) + ex.Message);
LogFactory.WriteLogEntry(Logger.Default, ex2);
throw ex2;
}
}
string interactivityLayer = null;
if (cartoProject.GetInteractivity() != null && cartoProject.GetInteractivity().ContainsKey("layer"))
{
interactivityLayer = cartoProject.GetInteractivity()["layer"].ToString();
}
map = CreateMap(cartoProject, definitions, env, cartoTranslator);
foreach (CartoLayer cartoLayer in cartoProject.Layers)
{
CartoDatasource datasource = cartoLayer.Datasource;
StyledLayer styledLayer = CreateStyledLayer(cartoLayer, map, cartoTranslator);
try
{
string[] classes = (cartoLayer.Class.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries));
Dictionary <string, bool> classIndex = new Dictionary <string, bool>(classes.Length);
for (int i = 0; i < classes.Length; i++)
{
classIndex[classes[i]] = true;
}
var matching = definitions.FindAll(delegate(CartoDefinition def) { return(def.AppliesTo(cartoLayer.Name, classIndex)); });
if (matching.Count > 0)
{
List <CartoStyle> rules = InheritDefinitions(matching, env);
if (rules.Count > 0)
{
SortStyles(rules, env);
for (int k = 0; k < rules.Count; k++)
{
CartoStyle cartoStyle = rules[k];
cartoStyle.Fold(env);
string styleName = cartoLayer.Name + (cartoStyle.Attachment != "__default__" ? "-" + cartoStyle.Attachment : "");
FeatureTypeStyle style = CreateStyle(styleName, cartoStyle, env, cartoTranslator);
if (style.Rules.Count > 0)
{
styledLayer.Styles.Add(style);
}
}
cartoTranslator.ProcessStyles(styledLayer.Styles);
}
if (!string.IsNullOrEmpty(interactivityLayer) && interactivityLayer.Equals(styledLayer.Name))
{
styledLayer.Enabled = false;
}
map.AddLayer(styledLayer);
}
}
catch (Exception ex)
{
Exception ex2 = new IOException(string.Format("Unable to create data source provider with type '{0}' for the layer '{1}'.", datasource.Type, cartoLayer.Name) + ex.Message);
LogFactory.WriteLogEntry(Logger.Default, ex2);
}
}
}
return(map);
}
/// <summary>
/// Creates <see cref="FeatureTypeStyle"/> object
/// </summary>
/// <param name="styleName"></param>
/// <param name="cartoStyle"></param>
/// <param name="env"></param>
/// <param name="cartoTranslator"></param>
/// <returns></returns>
private static FeatureTypeStyle CreateStyle(string styleName, CartoStyle cartoStyle, Env env, ICartoTranslator cartoTranslator)
{
FeatureTypeStyle style = new FeatureTypeStyle(styleName);
style.ProcessFeatureOnce = true;
List <CartoDefinition> definitions = cartoStyle.Definitions;
Dictionary <string, int> existingFilters = null;
List <string> imageFilters = new List <string>();
List <string> imageFiltersBuffer = new List <string>();
int k = 0;
for (int i = 0; i < definitions.Count; i++)
{
CartoDefinition def = definitions[i];
NodeList <CartoRule> rules = def.Rules;
for (int j = 0; j < rules.Count; j++)
{
CartoRule cartoRule = rules[j];
string ruleName = cartoRule.Name;
if (ruleName == "image-filters")
{
string filter = cartoRule.Value.ToString();
if (!imageFilters.Contains(filter))
{
style.ImageFiltersOptions.Filters.Add(cartoTranslator.ToImageFilter(filter));
style.ImageFiltersOptions.Enabled = true;
imageFilters.Add(filter);
}
k++;
}
else if (ruleName == "image-filters-inflate")
{
bool inflate = Convert.ToBoolean(cartoRule.Value.ToString());
if (inflate)
{
style.ImageFiltersOptions.Enabled = true;
}
k++;
}
else if (ruleName == "direct-image-filters")
{
string filter = cartoRule.Value.ToString();
if (!imageFiltersBuffer.Contains(filter))
{
style.ImageFiltersOptions.BufferFilters.Add(cartoTranslator.ToImageFilter(filter));
style.ImageFiltersOptions.Enabled = true;
imageFiltersBuffer.Add(filter);
}
k++;
}
else if (ruleName == "comp-op")
{
style.BlendingOptions.CompositingMode = cartoTranslator.ToCompositingMode(cartoRule.Value.Evaluate(env).ToString());
k++;
}
else if (ruleName == "opacity")
{
style.BlendingOptions.Opacity = (float)(cartoRule.Value.Evaluate(env) as Number).Value;
k++;
}
if (ruleName == "filter-mode")
{
string filterMode = cartoRule.Value.Evaluate(env).ToCSS(env);
if (string.Equals(filterMode, "all"))
{
style.ProcessFeatureOnce = false;
}
else if (string.Equals(filterMode, "first"))
{
style.ProcessFeatureOnce = true;
}
k++;
}
}
if (k < rules.Count)
{
if (existingFilters == null)
{
existingFilters = new Dictionary <string, int>();
}
CreateRules(style, def, env, existingFilters, cartoTranslator);
}
}
return(style);
}