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
214
215
216
217
218
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

use crate::dom::attr::Attr;
use crate::dom::bindings::codegen::Bindings::HTMLBodyElementBinding::HTMLBodyElementMethods;
use crate::dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::root::{DomRoot, LayoutDom};
use crate::dom::bindings::str::DOMString;
use crate::dom::document::Document;
use crate::dom::element::{AttributeMutation, Element, LayoutElementHelpers};
use crate::dom::eventtarget::EventTarget;
use crate::dom::htmlelement::HTMLElement;
use crate::dom::node::{document_from_node, window_from_node, BindContext, Node};
use crate::dom::virtualmethods::VirtualMethods;
use cssparser::RGBA;
use dom_struct::dom_struct;
use embedder_traits::EmbedderMsg;
use html5ever::{LocalName, Prefix};
use servo_url::ServoUrl;
use style::attr::AttrValue;

/// How long we should wait before performing the initial reflow after `<body>` is parsed, in
/// nanoseconds.
const INITIAL_REFLOW_DELAY: u64 = 200_000_000;

#[dom_struct]
pub struct HTMLBodyElement {
    htmlelement: HTMLElement,
}

impl HTMLBodyElement {
    fn new_inherited(
        local_name: LocalName,
        prefix: Option<Prefix>,
        document: &Document,
    ) -> HTMLBodyElement {
        HTMLBodyElement {
            htmlelement: HTMLElement::new_inherited(local_name, prefix, document),
        }
    }

    #[allow(unrooted_must_root)]
    pub fn new(
        local_name: LocalName,
        prefix: Option<Prefix>,
        document: &Document,
    ) -> DomRoot<HTMLBodyElement> {
        Node::reflect_node(
            Box::new(HTMLBodyElement::new_inherited(local_name, prefix, document)),
            document,
        )
    }

    /// <https://drafts.csswg.org/cssom-view/#the-html-body-element>
    pub fn is_the_html_body_element(&self) -> bool {
        let self_node = self.upcast::<Node>();
        let root_elem = self.upcast::<Element>().root_element();
        let root_node = root_elem.upcast::<Node>();
        root_node.is_parent_of(self_node) &&
            self_node
                .preceding_siblings()
                .all(|n| !n.is::<HTMLBodyElement>())
    }
}

impl HTMLBodyElementMethods for HTMLBodyElement {
    // https://html.spec.whatwg.org/multipage/#dom-body-bgcolor
    make_getter!(BgColor, "bgcolor");

    // https://html.spec.whatwg.org/multipage/#dom-body-bgcolor
    make_legacy_color_setter!(SetBgColor, "bgcolor");

    // https://html.spec.whatwg.org/multipage/#dom-body-text
    make_getter!(Text, "text");

    // https://html.spec.whatwg.org/multipage/#dom-body-text
    make_legacy_color_setter!(SetText, "text");

    // https://html.spec.whatwg.org/multipage/#dom-body-background
    make_getter!(Background, "background");

    // https://html.spec.whatwg.org/multipage/#dom-body-background
    fn SetBackground(&self, input: DOMString) {
        let value =
            AttrValue::from_resolved_url(&document_from_node(self).base_url(), input.into());
        self.upcast::<Element>()
            .set_attribute(&local_name!("background"), value);
    }

    // https://html.spec.whatwg.org/multipage/#windoweventhandlers
    window_event_handlers!(ForwardToWindow);
}

pub trait HTMLBodyElementLayoutHelpers {
    fn get_background_color(self) -> Option<RGBA>;
    fn get_color(self) -> Option<RGBA>;
    fn get_background(self) -> Option<ServoUrl>;
}

impl HTMLBodyElementLayoutHelpers for LayoutDom<'_, HTMLBodyElement> {
    fn get_background_color(self) -> Option<RGBA> {
        self.upcast::<Element>()
            .get_attr_for_layout(&ns!(), &local_name!("bgcolor"))
            .and_then(AttrValue::as_color)
            .cloned()
    }

    fn get_color(self) -> Option<RGBA> {
        self.upcast::<Element>()
            .get_attr_for_layout(&ns!(), &local_name!("text"))
            .and_then(AttrValue::as_color)
            .cloned()
    }

    fn get_background(self) -> Option<ServoUrl> {
        self.upcast::<Element>()
            .get_attr_for_layout(&ns!(), &local_name!("background"))
            .and_then(AttrValue::as_resolved_url)
            .cloned()
    }
}

impl VirtualMethods for HTMLBodyElement {
    fn super_type(&self) -> Option<&dyn VirtualMethods> {
        Some(self.upcast::<HTMLElement>() as &dyn VirtualMethods)
    }

    fn attribute_affects_presentational_hints(&self, attr: &Attr) -> bool {
        if attr.local_name() == &local_name!("bgcolor") {
            return true;
        }

        self.super_type()
            .unwrap()
            .attribute_affects_presentational_hints(attr)
    }

    fn bind_to_tree(&self, context: &BindContext) {
        if let Some(ref s) = self.super_type() {
            s.bind_to_tree(context);
        }

        if !context.tree_in_doc {
            return;
        }

        let window = window_from_node(self);
        let document = window.Document();
        document.set_reflow_timeout(time::precise_time_ns() + INITIAL_REFLOW_DELAY);
        if window.is_top_level() {
            let msg = EmbedderMsg::HeadParsed;
            window.send_to_embedder(msg);
        }
    }

    fn parse_plain_attribute(&self, name: &LocalName, value: DOMString) -> AttrValue {
        match *name {
            local_name!("bgcolor") | local_name!("text") => {
                AttrValue::from_legacy_color(value.into())
            },
            local_name!("background") => {
                AttrValue::from_resolved_url(&document_from_node(self).base_url(), value.into())
            },
            _ => self
                .super_type()
                .unwrap()
                .parse_plain_attribute(name, value),
        }
    }

    fn attribute_mutated(&self, attr: &Attr, mutation: AttributeMutation) {
        let do_super_mutate = match (attr.local_name(), mutation) {
            (name, AttributeMutation::Set(_)) if name.starts_with("on") => {
                let window = window_from_node(self);
                // https://html.spec.whatwg.org/multipage/
                // #event-handlers-on-elements,-document-objects,-and-window-objects:event-handlers-3
                match name {
                    &local_name!("onfocus") |
                    &local_name!("onload") |
                    &local_name!("onscroll") |
                    &local_name!("onafterprint") |
                    &local_name!("onbeforeprint") |
                    &local_name!("onbeforeunload") |
                    &local_name!("onhashchange") |
                    &local_name!("onlanguagechange") |
                    &local_name!("onmessage") |
                    &local_name!("onoffline") |
                    &local_name!("ononline") |
                    &local_name!("onpagehide") |
                    &local_name!("onpageshow") |
                    &local_name!("onpopstate") |
                    &local_name!("onstorage") |
                    &local_name!("onresize") |
                    &local_name!("onunload") |
                    &local_name!("onerror") => {
                        let evtarget = window.upcast::<EventTarget>(); // forwarded event
                        let source_line = 1; //TODO(#9604) obtain current JS execution line
                        evtarget.set_event_handler_uncompiled(
                            window.get_url(),
                            source_line,
                            &name[2..],
                            DOMString::from((**attr.value()).to_owned()),
                        );
                        false
                    },
                    _ => true, // HTMLElement::attribute_mutated will take care of this.
                }
            },
            _ => true,
        };

        if do_super_mutate {
            self.super_type().unwrap().attribute_mutated(attr, mutation);
        }
    }
}