1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
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
#[path = "macros.rs"]
#[macro_use]
mod macros;
use {
crate::utils::to_camel,
proc_macro::{Delimiter, TokenStream, TokenTree},
};
pub(super) fn handle_arguments(
arguments: TokenStream,
component_name: &str,
) -> (
TokenStream,
Vec<TokenStream>,
Vec<TokenStream>,
Vec<TokenStream>,
Vec<TokenStream>,
) {
let mut iter = arguments.into_iter();
let mut attrs = Vec::new();
let mut has_attr = false;
let mut var_bindings = Vec::new();
let mut field_defines = Vec::new();
let mut field_initializers = Vec::new();
let mut field_getters_and_setters = Vec::new();
while let Some(tree) = iter.next() {
match tree {
TokenTree::Group(g) if has_attr && g.delimiter() == Delimiter::Bracket => {
attrs.push(g.stream());
has_attr = false;
}
TokenTree::Punct(p) if !has_attr && p.as_char() == '#' => has_attr = true,
t if has_attr => {
return (
error!(arg, t.span(), "Expected attribute, got {}", t),
Default::default(),
Default::default(),
Default::default(),
Default::default(),
);
}
t => {
let TokenTree::Ident(ident) = t else {
return (
error!(arg, "Expected ident (property name)"),
Default::default(),
Default::default(),
Default::default(),
Default::default(),
);
};
let property_name = ident.to_string();
match iter.next() {
Some(TokenTree::Punct(p)) if p.as_char() == ':' => (),
Some(t) => {
return (
error!(
arg,
t.span(),
"Expected ':', got `{}` (property `{}` must specify a data type)",
t,
property_name
),
Default::default(),
Default::default(),
Default::default(),
Default::default(),
);
}
None => {
return (
error!(arg, "Expected ':', got eof"),
Default::default(),
Default::default(),
Default::default(),
Default::default(),
);
}
}
let mut argument_type = Vec::new();
while let Some(i) = iter.next() {
if let TokenTree::Punct(p) = &i
&& p.as_char() == ','
{
break;
}
argument_type.push(i.clone());
}
if argument_type.is_empty() {
return (
error!(arg, "Expected type (property type)"),
Default::default(),
Default::default(),
Default::default(),
Default::default(),
);
}
let property_type = argument_type
.iter()
.map(|i| i.to_string())
.collect::<String>();
let mut default_value = Vec::new();
let mut is_event = false;
let attrs_str = attrs
.iter()
.filter(|i| {
let mut iter = i.to_owned().to_owned().into_iter();
let item = iter.next();
if let Some(TokenTree::Ident(i)) = &item
&& i.to_string() == "default"
&& let Some(TokenTree::Punct(p)) = iter.next()
&& p.as_char() == '='
{
while let Some(i) = iter.next() {
default_value.push(i);
}
false
} else if let Some(TokenTree::Ident(i)) = &item
&& i.to_string() == "event"
{
is_event = true;
false
} else {
true
}
})
.map(|i| format!("#[{}]", i))
.collect::<String>();
attrs.clear();
var_bindings.push(ts!(
"{} let {} = this.get_{}();",
attrs_str,
property_name,
property_name
));
field_defines.push(if is_event {
ts!(
"{} {}: UnsafeCell<EventEmitter<'a, {}>>,",
attrs_str,
property_name,
property_type.replace("&", "&'a ")
)
} else {
ts!(
"{} {}: UnsafeCell<{}>,",
attrs_str,
property_name,
property_type.replace("&", "&'a ")
)
});
if is_event {
field_initializers.push(ts!(
"{} {}: EventEmitter::default().into(),",
attrs_str,
property_name
));
field_getters_and_setters.push(ts!(
"{} pub fn get_{}(&self) -> &EventEmitter<'a, {}> {{\nunsafe {{ transmute(self.{}.get()) }}\n}}",
attrs_str,
property_name,
property_type.replace("&", "&'a "),
property_name
));
field_getters_and_setters.push(ts!(
"{} pub fn set_{}(&self, value: &EventListener<'a, {}>) {{\nunsafe {{\n*self.{}.get() = value.new_emitter()\n}}\n}}",
attrs_str,
property_name,
property_type.replace("&", "&'a "),
property_name
))
} else {
let property_default_value = if default_value.is_empty() {
format!("<{}>::default()", property_type)
} else {
default_value.iter().map(|i| i.to_string()).collect()
};
field_initializers.push(ts!(
"{} {}: {}.into(),",
attrs_str,
property_name,
property_default_value
));
field_getters_and_setters.push(ts!(
"{} pub fn get_{}(&self) -> &{} {{\nunsafe {{ transmute(self.{}.get()) }}\n}}",
attrs_str,
property_name,
property_type.replace("&", "&'a "),
property_name
));
field_getters_and_setters.push(ts!(
"{} pub fn set_{}(&self, value: &{}) {{\nunsafe {{ *self.{}.get() = *value }}\n}}",
attrs_str,
property_name,
property_type.replace("&", "&'a "),
property_name
))
}
}
}
}
(
ts!("this: Weak<{}<'_>>", to_camel(component_name)),
var_bindings,
field_defines,
field_initializers,
field_getters_and_setters,
)
}