use crate::export_html_ops::ExportHtmlOps;
use crate::render_runtime::{
KRR_RENDER_RUNTIME_ID, KrrMathMode, KrrRenderPayload, KrrRenderRuntimeAdapter,
};
use crate::theme::KdvThemeSnapshot;
pub(crate) struct MathHtmlWriter;
impl MathHtmlWriter {
pub(crate) fn append_inline(html: &mut String, expression: &str, theme: &KdvThemeSnapshot) {
Self::append_rendered(html, "span", "inline", expression, true, theme);
}
pub(crate) fn append_block(
html: &mut String,
role: &str,
expression: &str,
theme: &KdvThemeSnapshot,
) {
Self::append_rendered(html, "div", role, expression, false, theme);
html.push('\n');
}
fn append_rendered(
html: &mut String,
tag: &str,
role: &str,
expression: &str,
inline: bool,
theme: &KdvThemeSnapshot,
) {
let trimmed = expression.trim();
let math_mode = if inline {
KrrMathMode::Inline
} else {
KrrMathMode::Display
};
let output = KrrRenderRuntimeAdapter::render_math_tex_with_theme(
trimmed,
math_mode,
Some(theme.krr_math_theme()),
);
match output.payload {
KrrRenderPayload::Svg(math_svg) => {
Self::append_svg_payload(html, tag, role, &math_svg);
}
KrrRenderPayload::Raw(ref raw) => {
Self::append_raw_payload(html, tag, role, raw, &output.diagnostic_message());
}
}
}
fn append_svg_payload(html: &mut String, tag: &str, role: &str, math_svg: &str) {
html.push_str(&format!(
"<{tag} data-kdv-math=\"{role}\" data-kdv-render-runtime=\"{KRR_RENDER_RUNTIME_ID}\">{math_svg}</{tag}>"
));
}
fn append_raw_payload(html: &mut String, tag: &str, role: &str, raw: &str, diagnostic: &str) {
html.push_str(&format!(
"<{tag} data-kdv-math=\"{role}\" data-kdv-render-runtime=\"{KRR_RENDER_RUNTIME_ID}\" data-kdv-render-error=\"{}\">{}</{tag}>",
ExportHtmlOps::escape_html(diagnostic),
ExportHtmlOps::escape_html(raw)
));
}
}