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use std::collections::HashMap;
use xml::attribute::OwnedAttribute;
use crate::{
parse_properties,
util::{get_attrs, map_wrapper, parse_tag, XmlEventResult},
Color, Error, MapTilesetGid, Object, ObjectData, Properties, Result,
/// Raw data referring to a map object layer or tile collision data.
#[derive(Debug, PartialEq, Clone)]
pub struct ObjectLayerData {
/// The color used in the editor to display objects in this layer.
pub colour: Option<Color>,
}
impl ObjectLayerData {
/// If it is known that there are no objects with tile images in it (i.e. collision data)
/// then we can pass in [`None`] as the tilesets
pub(crate) fn new(
parser: &mut impl Iterator<Item = XmlEventResult>,
attrs: Vec<OwnedAttribute>,
tilesets: Option<&[MapTilesetGid]>,
) -> Result<(ObjectLayerData, Properties)> {
attrs,
optionals: [
("color", colour, |v:String| v.parse().ok()),
);
let mut objects = Vec::new();
let mut properties = HashMap::new();
parse_tag!(parser, "objectgroup", {
"object" => |attrs| {
objects.push(ObjectData::new(parser, attrs, tilesets)?);
Ok(())
},
"properties" => |_| {
properties = parse_properties(parser)?;
Ok(())
},
});
Ok((ObjectLayerData { objects, colour: c }, properties))
}
/// Returns the data belonging to the objects contained within the layer, in the order they were
/// declared in the TMX file.
#[inline]
pub fn object_data(&self) -> &[ObjectData] {
self.objects.as_ref()
}
map_wrapper!(
#[doc = "Also called an \"object group\". Used for storing [`Object`]s in a map."]
ObjectLayer => ObjectLayerData);
/// Obtains the object corresponding to the index given.
pub fn get_object(&self, idx: usize) -> Option<Object<'map>> {
.map(|data| Object::new(self.map, data))
}
/// Returns an iterator over the objects present in this layer, in the order they were declared
/// in in the TMX file.
///
/// ## Example
/// ```
/// # use tiled::Loader;
/// use tiled::Object;
///
/// # fn main() {
/// # let map = Loader::new()
/// # .load_tmx_map("assets/tiled_group_layers.tmx")
/// # .unwrap();
/// #
/// let spawnpoints: Vec<Object> = map
/// .layers()
/// .filter_map(|layer| match layer.layer_type() {
/// tiled::LayerType::ObjectLayer(layer) => Some(layer),
/// _ => None,
/// })
/// .flat_map(|layer| layer.objects())
/// .filter(|object| object.obj_type == "spawn")
/// .collect();
///
/// dbg!(spawnpoints);
/// # }
/// ```
pub fn objects(&self) -> impl ExactSizeIterator<Item = Object<'map>> + 'map {
let map: &'map crate::Map = self.map;
self.data
.objects
.map(move |object| Object::new(map, object))