rsx_rosetta/
lib.rs

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
#![doc = include_str!("../README.md")]
#![doc(html_logo_url = "https://avatars.githubusercontent.com/u/79236386")]
#![doc(html_favicon_url = "https://avatars.githubusercontent.com/u/79236386")]

use convert_case::{Case, Casing};
use dioxus_html::{map_html_attribute_to_rsx, map_html_element_to_rsx};
use dioxus_rsx::{
    AttributeType, BodyNode, CallBody, Component, Element, ElementAttr, ElementAttrNamed,
    ElementName, IfmtInput,
};
pub use html_parser::{Dom, Node};
use proc_macro2::{Ident, Span};
use syn::{punctuated::Punctuated, LitStr};

/// Convert an HTML DOM tree into an RSX CallBody
pub fn rsx_from_html(dom: &Dom) -> CallBody {
    CallBody {
        roots: dom.children.iter().filter_map(rsx_node_from_html).collect(),
    }
}

/// Convert an HTML Node into an RSX BodyNode
///
/// If the node is a comment, it will be ignored since RSX doesn't support comments
pub fn rsx_node_from_html(node: &Node) -> Option<BodyNode> {
    match node {
        Node::Text(text) => Some(BodyNode::Text(ifmt_from_text(text))),
        Node::Element(el) => {
            let el_name = if let Some(name) = map_html_element_to_rsx(&el.name) {
                ElementName::Ident(Ident::new(name, Span::call_site()))
            } else {
                // if we don't recognize it and it has a dash, we assume it's a web component
                if el.name.contains('-') {
                    ElementName::Custom(LitStr::new(&el.name, Span::call_site()))
                } else {
                    // otherwise, it might be an element that isn't supported yet
                    ElementName::Ident(Ident::new(&el.name.to_case(Case::Snake), Span::call_site()))
                }
            };

            let mut attributes: Vec<_> = el
                .attributes
                .iter()
                .map(|(name, value)| {
                    let value = ifmt_from_text(value.as_deref().unwrap_or("false"));
                    let attr = if let Some(name) = map_html_attribute_to_rsx(name) {
                        let ident = if let Some(name) = name.strip_prefix("r#") {
                            Ident::new_raw(name, Span::call_site())
                        } else {
                            Ident::new(name, Span::call_site())
                        };
                        ElementAttr {
                            value: dioxus_rsx::ElementAttrValue::AttrLiteral(value),
                            name: dioxus_rsx::ElementAttrName::BuiltIn(ident),
                        }
                    } else {
                        // If we don't recognize the attribute, we assume it's a custom attribute
                        ElementAttr {
                            value: dioxus_rsx::ElementAttrValue::AttrLiteral(value),
                            name: dioxus_rsx::ElementAttrName::Custom(LitStr::new(
                                name,
                                Span::call_site(),
                            )),
                        }
                    };

                    AttributeType::Named(ElementAttrNamed {
                        el_name: el_name.clone(),
                        attr,
                    })
                })
                .collect();

            let class = el.classes.join(" ");
            if !class.is_empty() {
                attributes.push(AttributeType::Named(ElementAttrNamed {
                    el_name: el_name.clone(),
                    attr: ElementAttr {
                        name: dioxus_rsx::ElementAttrName::BuiltIn(Ident::new(
                            "class",
                            Span::call_site(),
                        )),
                        value: dioxus_rsx::ElementAttrValue::AttrLiteral(ifmt_from_text(&class)),
                    },
                }));
            }

            if let Some(id) = &el.id {
                attributes.push(AttributeType::Named(ElementAttrNamed {
                    el_name: el_name.clone(),
                    attr: ElementAttr {
                        name: dioxus_rsx::ElementAttrName::BuiltIn(Ident::new(
                            "id",
                            Span::call_site(),
                        )),
                        value: dioxus_rsx::ElementAttrValue::AttrLiteral(ifmt_from_text(id)),
                    },
                }));
            }

            let children = el.children.iter().filter_map(rsx_node_from_html).collect();

            Some(BodyNode::Element(Element {
                name: el_name,
                children,
                attributes,
                merged_attributes: Default::default(),
                key: None,
                brace: Default::default(),
            }))
        }

        // We ignore comments
        Node::Comment(_) => None,
    }
}

/// Pull out all the svgs from the body and replace them with components of the same name
pub fn collect_svgs(children: &mut [BodyNode], out: &mut Vec<BodyNode>) {
    for child in children {
        match child {
            BodyNode::Component(comp) => collect_svgs(&mut comp.children, out),

            BodyNode::Element(el) if el.name == "svg" => {
                // we want to replace this instance with a component
                let mut segments = Punctuated::new();

                segments.push(Ident::new("icons", Span::call_site()).into());

                let new_name: Ident = Ident::new(&format!("icon_{}", out.len()), Span::call_site());

                segments.push(new_name.clone().into());

                // Replace this instance with a component
                let mut new_comp = BodyNode::Component(Component {
                    name: syn::Path {
                        leading_colon: None,
                        segments,
                    },
                    prop_gen_args: None,
                    fields: vec![],
                    children: vec![],
                    manual_props: None,
                    key: None,
                    brace: Default::default(),
                    location: Default::default(),
                });

                std::mem::swap(child, &mut new_comp);

                // And push the original svg into the svg list
                out.push(new_comp);
            }

            BodyNode::Element(el) => collect_svgs(&mut el.children, out),

            _ => {}
        }
    }
}

fn ifmt_from_text(text: &str) -> IfmtInput {
    IfmtInput {
        source: Some(LitStr::new(text, Span::call_site())),
        segments: vec![],
    }
}