diff options
Diffstat (limited to 'src/content/flow.rs')
| -rw-r--r-- | src/content/flow.rs | 254 |
1 files changed, 0 insertions, 254 deletions
diff --git a/src/content/flow.rs b/src/content/flow.rs deleted file mode 100644 index 08c7891..0000000 --- a/src/content/flow.rs +++ /dev/null @@ -1,254 +0,0 @@ -//! The flow content type. -//! -//! **Flow** represents the sections, such as headings and code, which are -//! parsed per line. -//! An example is HTML, which has a certain starting condition (such as -//! `<script>` on its own line), then continues for a while, until an end -//! condition is found (such as `</style>`). -//! If that line with an end condition is never found, that flow goes until -//! the end. -//! -//! The constructs found in flow are: -//! -//! * [Blank line][crate::construct::blank_line] -//! * [Code (fenced)][crate::construct::code_fenced] -//! * [Code (indented)][crate::construct::code_indented] -//! * [Definition][crate::construct::definition] -//! * [Heading (atx)][crate::construct::heading_atx] -//! * [Heading (setext)][crate::construct::heading_setext] -//! * [HTML (flow)][crate::construct::html_flow] -//! * [Thematic break][crate::construct::thematic_break] - -use crate::event::Name; -use crate::state::{Name as StateName, State}; -use crate::tokenizer::Tokenizer; - -/// Start of flow. -// -/// ```markdown -/// > | ## alpha -/// ^ -/// > | bravo -/// ^ -/// > | *** -/// ^ -/// ``` -pub fn start(tokenizer: &mut Tokenizer) -> State { - match tokenizer.current { - Some(b'`' | b'~') => { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeParagraph), - ); - State::Retry(StateName::CodeFencedStart) - } - Some(b'<') => { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeParagraph), - ); - State::Retry(StateName::HtmlFlowStart) - } - Some(b'#') => { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeParagraph), - ); - State::Retry(StateName::HeadingAtxStart) - } - // Note: `-` is also used in thematic breaks, so it’s not included here. - Some(b'=') => { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeParagraph), - ); - State::Retry(StateName::HeadingSetextStart) - } - Some(b'*' | b'_') => { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeParagraph), - ); - State::Retry(StateName::ThematicBreakStart) - } - Some(b'[') => { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeParagraph), - ); - State::Retry(StateName::DefinitionStart) - } - // Actual parsing: blank line? Indented code? Indented anything? - // Also includes `-` which can be a setext heading underline or a thematic break. - None | Some(b'\t' | b'\n' | b' ' | b'-') => State::Retry(StateName::FlowBlankLineBefore), - // Must be a paragraph. - Some(_) => { - tokenizer.attempt(State::Next(StateName::FlowAfter), State::Nok); - State::Retry(StateName::ParagraphStart) - } - } -} - -/// At blank line. -/// -/// ```markdown -/// > | ␠␠␊ -/// ^ -/// ``` -pub fn blank_line_before(tokenizer: &mut Tokenizer) -> State { - tokenizer.attempt( - State::Next(StateName::FlowBlankLineAfter), - State::Next(StateName::FlowBeforeCodeIndented), - ); - State::Retry(StateName::BlankLineStart) -} - -/// At code (indented). -/// -/// ```markdown -/// > | ␠␠␠␠a -/// ^ -/// ``` -pub fn before_code_indented(tokenizer: &mut Tokenizer) -> State { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeCodeFenced), - ); - State::Retry(StateName::CodeIndentedStart) -} - -/// At code (fenced). -/// -/// ````markdown -/// > | ``` -/// ^ -/// ```` -pub fn before_code_fenced(tokenizer: &mut Tokenizer) -> State { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeHtml), - ); - State::Retry(StateName::CodeFencedStart) -} - -/// At html (flow). -/// -/// ```markdown -/// > | <a> -/// ^ -/// ``` -pub fn before_html(tokenizer: &mut Tokenizer) -> State { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeHeadingAtx), - ); - State::Retry(StateName::HtmlFlowStart) -} - -/// At heading (atx). -/// -/// ```markdown -/// > | # a -/// ^ -/// ``` -pub fn before_heading_atx(tokenizer: &mut Tokenizer) -> State { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeHeadingSetext), - ); - State::Retry(StateName::HeadingAtxStart) -} - -/// At heading (setext). -/// -/// ```markdown -/// | a -/// > | = -/// ^ -/// ``` -pub fn before_heading_setext(tokenizer: &mut Tokenizer) -> State { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeThematicBreak), - ); - State::Retry(StateName::HeadingSetextStart) -} - -/// At thematic break. -/// -/// ```markdown -/// > | *** -/// ^ -/// ``` -pub fn before_thematic_break(tokenizer: &mut Tokenizer) -> State { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeDefinition), - ); - State::Retry(StateName::ThematicBreakStart) -} - -/// At definition. -/// -/// ```markdown -/// > | [a]: b -/// ^ -/// ``` -pub fn before_definition(tokenizer: &mut Tokenizer) -> State { - tokenizer.attempt( - State::Next(StateName::FlowAfter), - State::Next(StateName::FlowBeforeParagraph), - ); - State::Retry(StateName::DefinitionStart) -} - -/// At paragraph. -/// -/// ```markdown -/// > | a -/// ^ -/// ``` -pub fn before_paragraph(tokenizer: &mut Tokenizer) -> State { - tokenizer.attempt(State::Next(StateName::FlowAfter), State::Nok); - State::Retry(StateName::ParagraphStart) -} - -/// After blank line. -/// -/// ```markdown -/// > | ␠␠␊ -/// ^ -/// ``` -pub fn blank_line_after(tokenizer: &mut Tokenizer) -> State { - match tokenizer.current { - None => State::Ok, - Some(b'\n') => { - tokenizer.enter(Name::BlankLineEnding); - tokenizer.consume(); - tokenizer.exit(Name::BlankLineEnding); - // Feel free to interrupt. - tokenizer.interrupt = false; - State::Next(StateName::FlowStart) - } - _ => unreachable!("expected eol/eof"), - } -} - -/// After flow. -/// -/// ```markdown -/// > | # a␊ -/// ^ -/// ``` -pub fn after(tokenizer: &mut Tokenizer) -> State { - match tokenizer.current { - None => State::Ok, - Some(b'\n') => { - tokenizer.enter(Name::LineEnding); - tokenizer.consume(); - tokenizer.exit(Name::LineEnding); - State::Next(StateName::FlowStart) - } - _ => unreachable!("expected eol/eof"), - } -} |