1use core::str::from_utf8_unchecked;
2
3use alloc::borrow::Cow;
4use alloc::string::String;
5use alloc::vec::Vec;
6
7#[cfg(feature = "std")]
8use std::io::{self, Write};
9
10macro_rules! parse_style {
11 ($e:expr, $step:ident, $b:block, $bq:block, $bc:block $(, $($addi:expr),+)?) => {
12 match $step {
13 0 => {
14 match $e {
15 b'<' => $step = 1,
16 b'\\' => $step = 100,
17 _ => (),
18 }
19 }
20 1 => {
21 match $e {
22 b'\\' => $step = 2,
23 _ => (),
24 }
25 }
26 2 => {
27 match $e {
28 b'/' => $step = 3,
29 b'!' => $step = 10,
30 $($(| $addi)+ => {
31 $step = 0;
32 $bq
33 },)?
34 _ => $step = 0,
35 }
36 }
37 3 => {
38 match $e {
39 b's' | b'S' => $step = 4,
40 b'\\' => $step = 100,
41 _ => $step = 0,
42 }
43 }
44 4 => {
45 match $e {
46 b't' | b'T' => $step = 5,
47 b'\\' => $step = 100,
48 _ => $step = 0,
49 }
50 }
51 5 => {
52 match $e {
53 b'y' | b'Y' => $step = 6,
54 b'\\' => $step = 100,
55 _ => $step = 0,
56 }
57 }
58 6 => {
59 match $e {
60 b'l' | b'L' => $step = 7,
61 b'\\' => $step = 100,
62 _ => $step = 0,
63 }
64 }
65 7 => {
66 match $e {
67 b'e' | b'E' => $step = 8,
68 b'\\' => $step = 100,
69 _ => $step = 0,
70 }
71 }
72 8 => {
73 match $e {
74 b'>' | 9..=13 | 28..=32 => {
75 $step = 0;
76 $b
77 },
78 b'\\' => $step = 100,
79 _ => $step = 0,
80 }
81 }
82 10 => {
83 match $e {
84 b'-' => $step = 11,
85 b'\\' => $step = 100,
86 _ => $step = 0,
87 }
88 }
89 11 => {
90 match $e {
91 b'-' => {
92 $step = 0;
93 $bc
94 },
95 b'\\' => $step = 100,
96 _ => $step = 0,
97 }
98 }
99 100 => {
100 match $e {
101 b'<' => $step = 1,
102 $($(| $addi)+ => {
103 $step = 0;
104 $bq
105 },)?
106 _ => $step = 0,
107 }
108 }
109 _ => unreachable!(),
110 }
111 };
112}
113
114macro_rules! parse_style_single_quoted_text {
115 ($e:expr, $step:ident, $b:block, $bq:block, $bc:block) => {
116 parse_style!($e, $step, $b, $bq, $bc, b'\'');
117 };
118}
119
120macro_rules! parse_style_double_quoted_text {
121 ($e:expr, $step:ident, $b:block, $bq:block, $bc:block) => {
122 parse_style!($e, $step, $b, $bq, $bc, b'"');
123 };
124}
125
126macro_rules! parse_style_quoted_text {
127 ($e:expr, $step:ident, $b:block, $bq:block, $bc:block) => {
128 parse_style!($e, $step, $b, $bq, $bc, b'\'', b'"');
129 };
130}
131
132decode_impl! {
133 6;
134 /// The following substring is unescaped:
135 ///
136 /// * `<\/style>` => `</style>`
137 parse_style;
138 /// Decode text from the `<style>` element.
139 decode_style;
140 /// Write text from the `<style>` element to a mutable `String` reference and return the encoded string slice.
141 decode_style_to_string;
142 /// Write text from the `<style>` element to a mutable `Vec<u8>` reference and return the encoded data slice.
143 decode_style_to_vec;
144 /// Write text from the `<style>` element to a writer.
145 decode_style_to_writer;
146}
147
148decode_impl! {
149 6;
150 /// The following substring and character is unescaped:
151 ///
152 /// * `<\/style>` => `</style>`
153 /// * `\'` => `'`
154 parse_style_single_quoted_text;
155 /// Decode text from a single quoted text in the `<style>` element.
156 decode_style_single_quoted_text;
157 /// Write text from a single quoted text in the `<style>` element to a mutable `String` reference and return the encoded string slice.
158 decode_style_single_quoted_text_to_string;
159 /// Write text from a single quoted text in the `<style>` element to a mutable `Vec<u8>` reference and return the encoded data slice.
160 decode_style_single_quoted_text_to_vec;
161 /// Write text from a single quoted text in the `<style>` element to a writer.
162 decode_style_single_quoted_text_to_writer;
163}
164
165decode_impl! {
166 6;
167 /// The following substring and character are unescaped:
168 ///
169 /// * `<\/style>` => `</style>`
170 /// * `\"` => `"`
171 parse_style_double_quoted_text;
172 /// Decode text from a double quoted text in the `<style>` element.
173 decode_style_double_quoted_text;
174 /// Write text from a double quoted text in the `<style>` element to a mutable `String` reference and return the encoded string slice.
175 decode_style_double_quoted_text_to_string;
176 /// Write text from a double quoted text in the `<style>` element to a mutable `Vec<u8>` reference and return the encoded data slice.
177 decode_style_double_quoted_text_to_vec;
178 /// Write text from a double quoted text in the `<style>` element to a writer.
179 decode_style_double_quoted_text_to_writer;
180}
181
182decode_impl! {
183 6;
184 /// The following substring and characters are unescaped:
185 ///
186 /// * `<\/style>` => `</style>`
187 /// * `\"` => `"`
188 /// * `\'` => `'`
189 parse_style_quoted_text;
190 /// Decode text from a quoted text in the `<style>` element.
191 decode_style_quoted_text;
192 /// Write text from a quoted text in the `<style>` element to a mutable `String` reference and return the encoded string slice.
193 decode_style_quoted_text_to_string;
194 /// Write text from a quoted text in the `<style>` element to a mutable `Vec<u8>` reference and return the encoded data slice.
195 decode_style_quoted_text_to_vec;
196 /// Write text from a quoted text in the `<style>` element to a writer.
197 decode_style_quoted_text_to_writer;
198}
199