Newer
Older
use std::{collections::HashMap, io::Read};
use xml::{attribute::OwnedAttribute, EventReader};
use crate::{
error::TiledError,
util::{get_attrs, parse_tag},
};
#[derive(Debug, PartialEq, Clone)]
pub struct ObjectGroup {
pub name: String,
pub opacity: f32,
pub visible: bool,
pub objects: Vec<Object>,
/**
* Layer index is not preset for tile collision boxes
*/
pub layer_index: Option<u32>,
pub properties: Properties,
/// The ID of the layer, as shown in the editor.
/// Layer ID stays the same even if layers are reordered or modified in the editor.
}
impl ObjectGroup {
pub(crate) fn new<R: Read>(
parser: &mut EventReader<R>,
attrs: Vec<OwnedAttribute>,
layer_index: Option<u32>,
) -> Result<ObjectGroup, TiledError> {
let ((o, v, c, n, id), ()) = get_attrs!(
attrs,
optionals: [
("opacity", opacity, |v:String| v.parse().ok()),
("visible", visible, |v:String| v.parse().ok().map(|x:i32| x == 1)),
("color", colour, |v:String| v.parse().ok()),
("name", name, |v:String| Some(v)),
("id", id, |v:String| v.parse().ok()),
required: [],
// this error should never happen since there are no required attrs
TiledError::MalformedAttributes("object group parsing error".to_string())
);
let mut objects = Vec::new();
let mut properties = HashMap::new();
parse_tag!(parser, "objectgroup", {
"object" => |attrs| {
objects.push(Object::new(parser, attrs)?);
Ok(())
},
"properties" => |_| {
properties = parse_properties(parser)?;
Ok(())
},
});
Ok(ObjectGroup {
name: n.unwrap_or(String::new()),
opacity: o.unwrap_or(1.0),
visible: v.unwrap_or(true),
objects: objects,
colour: c,
layer_index,
properties,
id: id.unwrap_or(0),
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
})
}
}
#[derive(Debug, PartialEq, Clone)]
pub enum ObjectShape {
Rect { width: f32, height: f32 },
Ellipse { width: f32, height: f32 },
Polyline { points: Vec<(f32, f32)> },
Polygon { points: Vec<(f32, f32)> },
Point(f32, f32),
}
#[derive(Debug, PartialEq, Clone)]
pub struct Object {
pub id: u32,
pub gid: u32,
pub name: String,
pub obj_type: String,
pub width: f32,
pub height: f32,
pub x: f32,
pub y: f32,
pub rotation: f32,
pub visible: bool,
pub shape: ObjectShape,
pub properties: Properties,
}
impl Object {
fn new<R: Read>(
parser: &mut EventReader<R>,
attrs: Vec<OwnedAttribute>,
) -> Result<Object, TiledError> {
let ((id, gid, n, t, w, h, v, r), (x, y)) = get_attrs!(
attrs,
optionals: [
("id", id, |v:String| v.parse().ok()),
("gid", gid, |v:String| v.parse().ok()),
("name", name, |v:String| v.parse().ok()),
("type", obj_type, |v:String| v.parse().ok()),
("width", width, |v:String| v.parse().ok()),
("height", height, |v:String| v.parse().ok()),
("visible", visible, |v:String| v.parse().ok().map(|x:i32| x == 1)),
("rotation", rotation, |v:String| v.parse().ok()),
],
required: [
("x", x, |v:String| v.parse().ok()),
("y", y, |v:String| v.parse().ok()),
],
TiledError::MalformedAttributes("objects must have an x and a y number".to_string())
);
let v = v.unwrap_or(true);
let w = w.unwrap_or(0f32);
let h = h.unwrap_or(0f32);
let r = r.unwrap_or(0f32);
let id = id.unwrap_or(0u32);
let gid = gid.unwrap_or(0u32);
let n = n.unwrap_or(String::new());
let t = t.unwrap_or(String::new());
let mut shape = None;
let mut properties = HashMap::new();
parse_tag!(parser, "object", {
"ellipse" => |_| {
shape = Some(ObjectShape::Ellipse {
width: w,
height: h,
});
Ok(())
},
"polyline" => |attrs| {
shape = Some(Object::new_polyline(attrs)?);
Ok(())
},
"polygon" => |attrs| {
shape = Some(Object::new_polygon(attrs)?);
Ok(())
},
"point" => |_| {
shape = Some(Object::new_point(x, y)?);
Ok(())
},
"properties" => |_| {
properties = parse_properties(parser)?;
Ok(())
},
});
let shape = shape.unwrap_or(ObjectShape::Rect {
width: w,
height: h,
});
Ok(Object {
id: id,
gid: gid,
name: n.clone(),
obj_type: t.clone(),
width: w,
height: h,
x: x,
y: y,
rotation: r,
visible: v,
shape: shape,
properties: properties,
})
}
fn new_polyline(attrs: Vec<OwnedAttribute>) -> Result<ObjectShape, TiledError> {
let ((), s) = get_attrs!(
attrs,
optionals: [],
required: [
("points", points, |v| Some(v)),
],
TiledError::MalformedAttributes("A polyline must have points".to_string())
);
let points = Object::parse_points(s)?;
Ok(ObjectShape::Polyline { points: points })
}
fn new_polygon(attrs: Vec<OwnedAttribute>) -> Result<ObjectShape, TiledError> {
let ((), s) = get_attrs!(
attrs,
optionals: [],
required: [
("points", points, |v| Some(v)),
],
TiledError::MalformedAttributes("A polygon must have points".to_string())
);
let points = Object::parse_points(s)?;
Ok(ObjectShape::Polygon { points: points })
}
fn new_point(x: f32, y: f32) -> Result<ObjectShape, TiledError> {
Ok(ObjectShape::Point(x, y))
}
fn parse_points(s: String) -> Result<Vec<(f32, f32)>, TiledError> {
let pairs = s.split(' ');
let mut points = Vec::new();
for v in pairs.map(|p| p.split(',')) {
let v: Vec<&str> = v.collect();
if v.len() != 2 {
return Err(TiledError::MalformedAttributes(
"one of a polyline's points does not have an x and y coordinate".to_string(),
));
}
let (x, y) = (v[0].parse().ok(), v[1].parse().ok());
if x.is_none() || y.is_none() {
return Err(TiledError::MalformedAttributes(
"one of polyline's points does not have i32eger coordinates".to_string(),
));
}
points.push((x.unwrap(), y.unwrap()));
}
Ok(points)
}
}