html5ever/tree_builder/
data.rs

1// Copyright 2014-2017 The html5ever Project Developers. See the
2// COPYRIGHT file at the top-level directory of this distribution.
3//
4// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
5// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
7// option. This file may not be copied, modified, or distributed
8// except according to those terms.
9
10use crate::interface::{LimitedQuirks, NoQuirks, Quirks, QuirksMode};
11use crate::tendril::StrTendril;
12use crate::tokenizer::Doctype;
13
14// These should all be lowercase, for ASCII-case-insensitive matching.
15static QUIRKY_PUBLIC_PREFIXES: &[&str] = &[
16    "-//advasoft ltd//dtd html 3.0 aswedit + extensions//",
17    "-//as//dtd html 3.0 aswedit + extensions//",
18    "-//ietf//dtd html 2.0 level 1//",
19    "-//ietf//dtd html 2.0 level 2//",
20    "-//ietf//dtd html 2.0 strict level 1//",
21    "-//ietf//dtd html 2.0 strict level 2//",
22    "-//ietf//dtd html 2.0 strict//",
23    "-//ietf//dtd html 2.0//",
24    "-//ietf//dtd html 2.1e//",
25    "-//ietf//dtd html 3.0//",
26    "-//ietf//dtd html 3.2 final//",
27    "-//ietf//dtd html 3.2//",
28    "-//ietf//dtd html 3//",
29    "-//ietf//dtd html level 0//",
30    "-//ietf//dtd html level 1//",
31    "-//ietf//dtd html level 2//",
32    "-//ietf//dtd html level 3//",
33    "-//ietf//dtd html strict level 0//",
34    "-//ietf//dtd html strict level 1//",
35    "-//ietf//dtd html strict level 2//",
36    "-//ietf//dtd html strict level 3//",
37    "-//ietf//dtd html strict//",
38    "-//ietf//dtd html//",
39    "-//metrius//dtd metrius presentational//",
40    "-//microsoft//dtd internet explorer 2.0 html strict//",
41    "-//microsoft//dtd internet explorer 2.0 html//",
42    "-//microsoft//dtd internet explorer 2.0 tables//",
43    "-//microsoft//dtd internet explorer 3.0 html strict//",
44    "-//microsoft//dtd internet explorer 3.0 html//",
45    "-//microsoft//dtd internet explorer 3.0 tables//",
46    "-//netscape comm. corp.//dtd html//",
47    "-//netscape comm. corp.//dtd strict html//",
48    "-//o'reilly and associates//dtd html 2.0//",
49    "-//o'reilly and associates//dtd html extended 1.0//",
50    "-//o'reilly and associates//dtd html extended relaxed 1.0//",
51    "-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//",
52    "-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//",
53    "-//spyglass//dtd html 2.0 extended//",
54    "-//sq//dtd html 2.0 hotmetal + extensions//",
55    "-//sun microsystems corp.//dtd hotjava html//",
56    "-//sun microsystems corp.//dtd hotjava strict html//",
57    "-//w3c//dtd html 3 1995-03-24//",
58    "-//w3c//dtd html 3.2 draft//",
59    "-//w3c//dtd html 3.2 final//",
60    "-//w3c//dtd html 3.2//",
61    "-//w3c//dtd html 3.2s draft//",
62    "-//w3c//dtd html 4.0 frameset//",
63    "-//w3c//dtd html 4.0 transitional//",
64    "-//w3c//dtd html experimental 19960712//",
65    "-//w3c//dtd html experimental 970421//",
66    "-//w3c//dtd w3 html//",
67    "-//w3o//dtd w3 html 3.0//",
68    "-//webtechs//dtd mozilla html 2.0//",
69    "-//webtechs//dtd mozilla html//",
70];
71
72static QUIRKY_PUBLIC_MATCHES: &[&str] = &[
73    "-//w3o//dtd w3 html strict 3.0//en//",
74    "-/w3c/dtd html 4.0 transitional/en",
75    "html",
76];
77
78static QUIRKY_SYSTEM_MATCHES: &[&str] =
79    &["http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"];
80
81static LIMITED_QUIRKY_PUBLIC_PREFIXES: &[&str] = &[
82    "-//w3c//dtd xhtml 1.0 frameset//",
83    "-//w3c//dtd xhtml 1.0 transitional//",
84];
85
86static HTML4_PUBLIC_PREFIXES: &[&str] = &[
87    "-//w3c//dtd html 4.01 frameset//",
88    "-//w3c//dtd html 4.01 transitional//",
89];
90
91pub(crate) fn doctype_error_and_quirks(
92    doctype: &Doctype,
93    iframe_srcdoc: bool,
94) -> (bool, QuirksMode) {
95    fn opt_string_as_slice(x: &Option<String>) -> Option<&str> {
96        x.as_deref()
97    }
98
99    fn opt_tendril_as_slice(x: &Option<StrTendril>) -> Option<&str> {
100        x.as_deref()
101    }
102
103    fn opt_to_ascii_lower(x: Option<&str>) -> Option<String> {
104        x.map(|y| y.to_ascii_lowercase())
105    }
106
107    let name = opt_tendril_as_slice(&doctype.name);
108    let public = opt_tendril_as_slice(&doctype.public_id);
109    let system = opt_tendril_as_slice(&doctype.system_id);
110
111    let err = !matches!(
112        (name, public, system),
113        (Some("html"), None, None)
114            | (Some("html"), None, Some("about:legacy-compat"))
115            | (Some("html"), Some("-//W3C//DTD HTML 4.0//EN"), None)
116            | (
117                Some("html"),
118                Some("-//W3C//DTD HTML 4.0//EN"),
119                Some("http://www.w3.org/TR/REC-html40/strict.dtd"),
120            )
121            | (Some("html"), Some("-//W3C//DTD HTML 4.01//EN"), None)
122            | (
123                Some("html"),
124                Some("-//W3C//DTD HTML 4.01//EN"),
125                Some("http://www.w3.org/TR/html4/strict.dtd"),
126            )
127            | (
128                Some("html"),
129                Some("-//W3C//DTD XHTML 1.0 Strict//EN"),
130                Some("http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"),
131            )
132            | (
133                Some("html"),
134                Some("-//W3C//DTD XHTML 1.1//EN"),
135                Some("http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"),
136            )
137    );
138
139    // FIXME: We could do something asymptotically faster here.
140    // But there aren't many strings, and this happens at most once per parse.
141    fn contains_pfx(haystack: &[&str], needle: &str) -> bool {
142        haystack.iter().any(|&x| needle.starts_with(x))
143    }
144
145    // Quirks-mode matches are case-insensitive.
146    let public = opt_to_ascii_lower(public);
147    let system = opt_to_ascii_lower(system);
148
149    let quirk = match (opt_string_as_slice(&public), opt_string_as_slice(&system)) {
150        _ if doctype.force_quirks => Quirks,
151        _ if name != Some("html") => Quirks,
152
153        _ if iframe_srcdoc => NoQuirks,
154
155        (Some(ref p), _) if QUIRKY_PUBLIC_MATCHES.contains(p) => Quirks,
156        (_, Some(ref s)) if QUIRKY_SYSTEM_MATCHES.contains(s) => Quirks,
157
158        (Some(p), _) if contains_pfx(QUIRKY_PUBLIC_PREFIXES, p) => Quirks,
159        (Some(p), _) if contains_pfx(LIMITED_QUIRKY_PUBLIC_PREFIXES, p) => LimitedQuirks,
160
161        (Some(p), s) if contains_pfx(HTML4_PUBLIC_PREFIXES, p) => match s {
162            None => Quirks,
163            Some(_) => LimitedQuirks,
164        },
165
166        _ => NoQuirks,
167    };
168
169    (err, quirk)
170}
html5ever/tree_builder/data.rs

html5ever/tree_builder/
data.rs
