Enum ElementKind 

pub enum ElementKind {
    Empty,
    Heading {
        level: u8,
        text: Vec<TextSegment>,
        section_id: usize,
        collapsed: bool,
    },
    HeadingBorder {
        level: u8,
    },
    CodeBlockHeader {
        language: String,
        blockquote_depth: usize,
    },
    CodeBlockContent {
        content: String,
        highlighted: Option<Text<'static>>,
        line_number: usize,
        blockquote_depth: usize,
    },
    CodeBlockBorder {
        kind: CodeBlockBorderKind,
        blockquote_depth: usize,
    },
    Paragraph(Vec<TextSegment>),
    ListItem {
        depth: usize,
        ordered: bool,
        number: Option<usize>,
        content: Vec<TextSegment>,
    },
    Blockquote {
        content: Vec<TextSegment>,
        depth: usize,
    },
    TableRow {
        cells: Vec<String>,
        is_header: bool,
        alignments: Vec<ColumnAlignment>,
    },
    TableBorder(TableBorderKind),
    HorizontalRule,
    Frontmatter {
        fields: Vec<(String, String)>,
        collapsed: bool,
    },
    FrontmatterStart {
        collapsed: bool,
        context_id: Option<String>,
    },
    FrontmatterField {
        key: String,
        value: String,
    },
    FrontmatterEnd,
    Expandable {
        content_id: String,
        lines: Vec<MarkdownElement>,
        max_lines: usize,
        collapsed: bool,
        total_lines: usize,
    },
    ExpandToggle {
        content_id: String,
        expanded: bool,
        hidden_count: usize,
    },
}

Represents the kind of markdown element.

Variants

Empty

Empty line (default).

Heading

Heading with level (1-6).

Fields

level: u8

text: Vec<TextSegment>

section_id: usize

Unique section ID for tracking collapse state (index in elements vector).

collapsed: bool

Whether this section is collapsed.

HeadingBorder

Border below heading.

Fields

level: u8

CodeBlockHeader

Code block header with language.

Fields

language: String

blockquote_depth: usize

Blockquote nesting depth (0 = not in blockquote)

CodeBlockContent

Code block content line (plain text or syntax highlighted).

Fields

content: String

Plain text content

highlighted: Option<Text<'static>>

Syntax highlighted text (if available)

line_number: usize

Line number (1-indexed)

blockquote_depth: usize

Blockquote nesting depth (0 = not in blockquote)

CodeBlockBorder

Code block border (top, middle, bottom).

Fields

kind: CodeBlockBorderKind

blockquote_depth: usize

Blockquote nesting depth (0 = not in blockquote)

Paragraph(Vec<TextSegment>)

Paragraph text with formatting.

ListItem

List item with nesting level.

Fields

depth: usize

ordered: bool

number: Option<usize>

content: Vec<TextSegment>

Blockquote

Blockquote with nesting depth.

Fields

content: Vec<TextSegment>

depth: usize

Nesting depth (1 = single >, 2 = >> , etc.)

TableRow

Table row.

Fields

cells: Vec<String>

is_header: bool

alignments: Vec<ColumnAlignment>

TableBorder(TableBorderKind)

Table border.

HorizontalRule

Horizontal rule.

Frontmatter

YAML frontmatter (collapsible) - legacy single-block format. Contains the parsed fields as key-value pairs.

Fields

fields: Vec<(String, String)>

The frontmatter fields (key, value).

collapsed: bool

Whether the frontmatter is collapsed (shows only context_id).

FrontmatterStart

Frontmatter top border with collapse icon.

Fields

collapsed: bool

Whether the frontmatter section is collapsed.

context_id: Option<String>

Context ID to show when collapsed (from frontmatter fields).

FrontmatterField

A single frontmatter field (key: value).

Fields

key: String

The field key.

value: String

The field value.

FrontmatterEnd

Frontmatter bottom border.

Expandable

Expandable content block (e.g., “Show more” / “Show less”).

Fields

content_id: String

Unique ID for tracking state

lines: Vec<MarkdownElement>

The content to display (already markdown elements)

max_lines: usize

Maximum number of lines to show when collapsed

collapsed: bool

Whether currently collapsed

total_lines: usize

Total number of lines in the content

ExpandToggle

Show more / Show less toggle button.

Fields

content_id: String

The content_id this toggle belongs to

expanded: bool

Whether in expanded state (shows “Show less”) or collapsed (shows “Show more”)

hidden_count: usize

Number of hidden lines

Trait Implementations

impl Clone for ElementKind

fn clone(&self) -> ElementKind

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ElementKind

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for ElementKind

fn default() -> ElementKind

Returns the “default value” for a type.