// BuildMapFromString parses the style from a string and adds all
// mml.Layers to the map.
func BuildMapFromString(m Map, mml *mml.MML, style string) error {
carto := mss.New()
err := carto.ParseString(style)
if err != nil {
return err
}
if err := carto.Evaluate(); err != nil {
return err
}
for _, l := range mml.Layers {
rules := carto.MSS().LayerRules(l.ID, l.Classes...)
if len(rules) > 0 {
m.AddLayer(l, rules)
}
}
if m, ok := m.(MapOptionsSetter); ok {
if bgColor, ok := carto.MSS().Map().GetColor("background-color"); ok {
m.SetBackgroundColor(bgColor)
}
}
return nil
}
// Build parses MML, MSS files, builds all rules and adds them to the Map.
func (b *Builder) Build() error {
layerNames := []string{}
layers := []mml.Layer{}
if b.mml != "" {
r, err := os.Open(b.mml)
if err != nil {
return err
}
defer r.Close()
mml, err := mml.Parse(r)
if err != nil {
return err
}
if len(b.mss) == 0 {
for _, s := range mml.Stylesheets {
b.mss = append(b.mss, filepath.Join(filepath.Dir(b.mml), s))
}
}
for _, l := range mml.Layers {
layers = append(layers, l)
layerNames = append(layerNames, l.Name)
}
}
carto := mss.New()
if b.deferEval {
carto.EnableDeferredEval()
}
for _, mss := range b.mss {
err := carto.ParseFile(mss)
if err != nil {
return err
}
}
if err := carto.Evaluate(); err != nil {
return err
}
if b.mml == "" {
layerNames = carto.MSS().Layers()
for _, layerName := range layerNames {
layers = append(layers,
// XXX assume we only have LineStrings for -mss only export
mml.Layer{Name: layerName, Type: mml.LineString},
)
}
}
for _, l := range layers {
rules := carto.MSS().LayerRules(l.Name, l.Classes...)
if b.dumpRules != nil {
for _, r := range rules {
fmt.Fprintln(b.dumpRules, r.String())
}
}
if len(rules) > 0 {
b.dstMap.AddLayer(l, rules)
}
}
if m, ok := b.dstMap.(MapOptionsSetter); ok {
if bgColor, ok := carto.MSS().Map().GetColor("background-color"); ok {
m.SetBackgroundColor(bgColor)
}
}
return nil
}
