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use std::collections::VecDeque;
use wasm_bindgen::JsValue;
use web_sys::js_sys::Function;
use xml::{Parser, Event};
fn create_handler_function() {
let _ = Function::new_no_args("
if(window._handleXMLNodeExpand) {
return;
}
window._handleXMLNodeExpand = function(that) {
const opened = '▼';
const closed = '►';
that.classList.toggle('xml-expand--is_closed');
const isClosed = that.classList.contains('xml-expand--is_closed');
that.innerHTML = isClosed ? closed : opened;
isClosed
? Array.from(that.parentElement.querySelectorAll('div')).forEach(item => item.style.display = 'none')
: Array.from(that.parentElement.querySelectorAll('div')).forEach(item => item.style.display = 'block') ;
}
").call0(&JsValue::default());
}
/// Represents an XML converter
pub struct XmlConverter {
style: Option<String>
}
impl XmlConverter {
/// Creates an XML converter.
///
/// # Examples
///
/// ```
/// use xml_viewer::XmlConverter;
/// let converter = XmlConverter::new();
/// ```
pub fn new() -> Self {
XmlConverter {
style: Some("
.xml-node {
color: rgb(136, 18, 128);
}
.xml-expand {
opacity: 0;
pointer-events: none;
font-size:.6rem;
}
.xml-node:has(.xml-node) > .xml-expand {
opacity: 1;
pointer-events: auto;
color: rgb(149, 156, 166);
cursor:pointer
}
.xml-error {
display: flex;
justify-content: center;
align-items: center;
font-size: 1.5rem
}
.xml-container {
width: 100%;
height: 100%;
}
.xml-attr-prefix {
color: rgb(153, 69, 0);
}
.xml-attr-value {
color: rgb(26, 26, 166);
}
.xml-text-value {
color: rgb(0, 0, 0);
}
".to_string())
}
}
/// Creates an XML converter with a given style as a string.
///
/// # Examples
///
/// ```
/// use xml_viewer::XmlConverter;
/// let converter = XmlConverter::with_style(
/// "
/// .xml-node {
/// color: rgb(136, 18, 128);
/// }
/// .xml-container {
/// width: 100%;
/// height: 100%;
/// }
/// .xml-attr-prefix {
/// color: rgb(153, 69, 0);
/// }
/// .xml-attr-value {
/// color: rgb(26, 26, 166);
/// }
/// .xml-text-value {
/// color: rgb(0, 0, 0);
/// }
/// "
/// );
/// ```
#[allow(dead_code)]
pub fn with_style(style: String) -> Self {
XmlConverter {
style: Some(style),
}
}
/// Converts output HTML string
pub fn to_html(&self, source: String) -> String {
create_handler_function();
let mut p = Parser::new();
let mut buffer = String::new();
let mut margin: f32;
p.feed_str(&source);
let mut ids = VecDeque::<String>::new();
for event in p {
let e = match event {
Ok(e) => e,
Err(_) => {
buffer.push_str("<div>XML parser error</div>");
break;
},
};
match e {
Event::ElementStart(tag) => {
let id = format!("{}", ids.len().to_string());
ids.push_front(id.clone());
margin = ids.len() as f32 * 10.0;
let mut attr_string: String = String::new();
for pair in tag.attributes.into_iter() {
let ns_prefix = match pair.0.1 {
Some(val) => format!("{}:", val),
None => "".to_string(),
};
attr_string.push_str(format!(
"<span class='xml-attr-prefix'>{}{}</span>=<span class='xml-attr-value'>\"{}\"</span>",
ns_prefix, pair.0.0,
pair.1).as_str()
);
}
let ns: String = match tag.prefix {
Some(val) => format!("{}:", val),
None => "".to_string(),
};
buffer.push_str(
&r#"
<div class="xml-node" data-id={id} style="margin-left:{margin}px;">
<a class="xml-expand" onclick=window._handleXMLNodeExpand(this)>▼</a>
<span><{ns}{name}</span> {attrs}<span>></span>"#.replace("{id}", &id.to_string())
.replace("{margin}", &margin.to_string())
.replace("{ns}", &ns)
.replace("{name}", &tag.name)
.replace("{attrs}", &attr_string)
);
},
Event::ElementEnd(tag) => {
let _ = ids.pop_front();
let ns: String = match tag.prefix {
Some(val) => format!("{}:", val),
None => "".to_string(),
};
buffer.push_str(
&format!(r#"<span></{}{}></span></div>"#,
ns,
tag.name
)
);
},
Event::Characters(text) => {
buffer.push_str(
&format!(
r#"<span class="xml-text-value">{}</span>"#,
&text,
)
);
},
_ => ()
}
}
if let Some(style) = &self.style {
buffer.insert_str(0, format!("<style>{}</style>", style).as_str());
}
buffer
}
}