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//! 行内 Markdown 元素渲染子模块
use ratatui::{
style::{Modifier, Style},
text::Span,
};
use super::MarkdownRenderer;
impl MarkdownRenderer {
/// 渲染行内元素
pub(super) fn render_inline(&self, text: &str) -> Vec<Span<'static>> {
let mut spans = Vec::new();
let mut remaining = text;
while !remaining.is_empty() {
let code_pos = remaining.find('`');
let img_pos = remaining.find("![");
let bold_pos = remaining.find("**");
let strike_pos = remaining.find("~~");
let italic_pos = remaining.find('*');
let link_pos = remaining.find('[');
let min_pos = [
code_pos, img_pos, bold_pos, strike_pos, italic_pos, link_pos,
]
.iter()
.filter_map(|&p| p)
.min();
let Some(pos) = min_pos else {
spans.push(Span::styled(
remaining.to_string(),
self.style(self.theme.text_normal),
));
break;
};
let is_img = img_pos == Some(pos);
let is_code = code_pos == Some(pos) && !is_img;
let is_bold = bold_pos == Some(pos);
let is_strike = strike_pos == Some(pos);
let is_link = link_pos == Some(pos) && !is_img;
let is_italic = italic_pos == Some(pos) && !is_bold && !is_img;
if pos > 0 {
spans.push(Span::styled(
remaining[..pos].to_string(),
self.style(self.theme.text_normal),
));
}
remaining = &remaining[pos..];
// 行内代码
if is_code {
remaining = &remaining[1..];
if let Some(end) = remaining.find('`') {
spans.push(Span::styled(
remaining[..end].to_string(),
Style::default()
.fg(self.theme.md_inline_code_fg)
.bg(self.theme.md_inline_code_bg),
));
remaining = &remaining[end + 1..];
} else {
spans.push(Span::styled(
format!("`{}", remaining),
self.style(self.theme.text_normal),
));
break;
}
}
// 图片
else if is_img {
remaining = &remaining[2..];
if let Some(alt_end) = remaining.find("](") {
let alt = &remaining[..alt_end];
remaining = &remaining[alt_end + 2..];
if let Some(url_end) = remaining.find(')') {
spans.push(Span::styled(
format!("🖼 {}", alt),
Style::default()
.fg(self.theme.text_dim)
.add_modifier(Modifier::ITALIC),
));
remaining = &remaining[url_end + 1..];
} else {
spans.push(Span::styled(
format!("![{}{}", alt, remaining),
self.style(self.theme.text_normal),
));
break;
}
} else {
spans.push(Span::styled(
format!("![{}", remaining),
self.style(self.theme.text_normal),
));
break;
}
}
// 粗体
else if is_bold {
remaining = &remaining[2..];
if let Some(end) = remaining.find("**") {
let inner = &remaining[..end];
let inner_spans = self.render_inline(inner);
for span in inner_spans {
spans.push(Span::styled(
span.content,
span.style.add_modifier(Modifier::BOLD),
));
}
remaining = &remaining[end + 2..];
} else {
spans.push(Span::styled(
format!("**{}", remaining),
self.style(self.theme.text_normal),
));
break;
}
}
// 删除线
else if is_strike {
remaining = &remaining[2..];
if let Some(end) = remaining.find("~~") {
let inner = &remaining[..end];
let inner_spans = self.render_inline(inner);
for span in inner_spans {
spans.push(Span::styled(
span.content,
span.style.add_modifier(Modifier::CROSSED_OUT),
));
}
remaining = &remaining[end + 2..];
} else {
spans.push(Span::styled(
format!("~~{}", remaining),
self.style(self.theme.text_normal),
));
break;
}
}
// 斜体
else if is_italic {
remaining = &remaining[1..];
if let Some(end) = remaining.find('*') {
let inner = &remaining[..end];
let inner_spans = self.render_inline(inner);
for span in inner_spans {
spans.push(Span::styled(
span.content,
span.style.add_modifier(Modifier::ITALIC),
));
}
remaining = &remaining[end + 1..];
} else {
spans.push(Span::styled(
format!("*{}", remaining),
self.style(self.theme.text_normal),
));
break;
}
}
// 链接
else if is_link {
remaining = &remaining[1..];
if let Some(text_end) = remaining.find("](") {
let link_text = &remaining[..text_end];
remaining = &remaining[text_end + 2..];
if let Some(url_end) = remaining.find(')') {
spans.push(Span::styled(
link_text.to_string(),
self.style(self.theme.md_link)
.add_modifier(Modifier::UNDERLINED),
));
spans.push(Span::styled(
" ↗".to_string(),
self.style(self.theme.text_dim),
));
remaining = &remaining[url_end + 1..];
} else {
spans.push(Span::styled(
format!("[{}{}", link_text, remaining),
self.style(self.theme.text_normal),
));
break;
}
} else {
spans.push(Span::styled(
format!("[{}", remaining),
self.style(self.theme.text_normal),
));
break;
}
}
}
spans
}
}