|
|
|
use super::elements::*;
|
|
|
|
use super::tokens::*;
|
|
|
|
use crate::parsing::charstate::CharStateMachine;
|
|
|
|
use crate::parsing::inline::ParseInline;
|
|
|
|
use crate::parsing::placeholders::ProcessPlaceholders;
|
|
|
|
use crossbeam_utils::sync::WaitGroup;
|
|
|
|
use std::collections::HashMap;
|
|
|
|
use std::error::Error;
|
|
|
|
use std::fmt;
|
|
|
|
use std::fmt::{Display, Formatter};
|
|
|
|
use std::fs::read_to_string;
|
|
|
|
use std::io;
|
|
|
|
use std::path::Path;
|
|
|
|
use std::sync::{Arc, Mutex};
|
|
|
|
use std::thread;
|
|
|
|
use termion::color::{self, Fg};
|
|
|
|
use termion::style;
|
|
|
|
|
|
|
|
macro_rules! parse_option {
|
|
|
|
($option:expr, $index:expr) => {
|
|
|
|
if let Some(_) = $option {
|
|
|
|
} else {
|
|
|
|
return Err(ParseError::new($index));
|
|
|
|
}
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Debug)]
|
|
|
|
pub struct ParseError {
|
|
|
|
index: usize,
|
|
|
|
message: Option<String>,
|
|
|
|
}
|
|
|
|
impl Display for ParseError {
|
|
|
|
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
|
|
|
|
if let Some(message) = &self.message {
|
|
|
|
write!(
|
|
|
|
f,
|
|
|
|
"{} Parse Error at index {}: {}{}",
|
|
|
|
Fg(color::Red),
|
|
|
|
self.index,
|
|
|
|
message,
|
|
|
|
style::Reset
|
|
|
|
)
|
|
|
|
} else {
|
|
|
|
write!(
|
|
|
|
f,
|
|
|
|
"{} Parse Error at index {}{}",
|
|
|
|
Fg(color::Red),
|
|
|
|
self.index,
|
|
|
|
style::Reset
|
|
|
|
)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
impl Error for ParseError {}
|
|
|
|
impl ParseError {
|
|
|
|
pub fn new(index: usize) -> Self {
|
|
|
|
Self {
|
|
|
|
index,
|
|
|
|
message: None,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn new_with_message(index: usize, message: &str) -> Self {
|
|
|
|
Self {
|
|
|
|
index,
|
|
|
|
message: Some(message.to_string()),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn set_message(&mut self, message: &str) {
|
|
|
|
self.message = Some(message.to_string());
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn get_position(&self, content: &str) -> Option<(usize, usize)> {
|
|
|
|
if content.len() <= self.index {
|
|
|
|
return None;
|
|
|
|
}
|
|
|
|
let split_content = content.split_at(self.index);
|
|
|
|
let line_number = split_content.0.matches("\n").count() as usize;
|
|
|
|
let overshoot_position = self.index as isize - split_content.0.len() as isize;
|
|
|
|
|
|
|
|
if let Some(line) = split_content.0.lines().last() {
|
|
|
|
let inline_position = (line.len() as isize + overshoot_position) as usize;
|
|
|
|
|
|
|
|
Some((line_number, inline_position))
|
|
|
|
} else {
|
|
|
|
None
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct Parser {
|
|
|
|
pub(crate) index: usize,
|
|
|
|
pub(crate) text: Vec<char>,
|
|
|
|
pub(crate) current_char: char,
|
|
|
|
section_nesting: u8,
|
|
|
|
sections: Vec<u8>,
|
|
|
|
section_return: Option<u8>,
|
|
|
|
path: Option<String>,
|
|
|
|
paths: Arc<Mutex<Vec<String>>>,
|
|
|
|
wg: WaitGroup,
|
|
|
|
is_child: bool,
|
|
|
|
pub(crate) inline_break_at: Vec<char>,
|
|
|
|
document: Document,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Parser {
|
|
|
|
pub fn new_from_file(path: String) -> Result<Self, io::Error> {
|
|
|
|
let content = read_to_string(path.clone())?;
|
|
|
|
Ok(Self::new(content, Some(path)))
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn new(text: String, path: Option<String>) -> Self {
|
|
|
|
Parser::create(text, path, Arc::new(Mutex::new(Vec::new())), false)
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn new_as_child(text: String, path: String, paths: Arc<Mutex<Vec<String>>>) -> Self {
|
|
|
|
Self::create(text, Some(path), paths, true)
|
|
|
|
}
|
|
|
|
|
|
|
|
fn create(
|
|
|
|
text: String,
|
|
|
|
path: Option<String>,
|
|
|
|
paths: Arc<Mutex<Vec<String>>>,
|
|
|
|
is_child: bool,
|
|
|
|
) -> Self {
|
|
|
|
let mut text: Vec<char> = text.chars().collect();
|
|
|
|
text.append(&mut vec!['\n', ' ', '\n']); // push space and newline of eof. it fixes stuff and I don't know why.
|
|
|
|
let current_char = text.get(0).unwrap().clone();
|
|
|
|
if let Some(path) = path.clone() {
|
|
|
|
let path_info = Path::new(&path);
|
|
|
|
paths
|
|
|
|
.lock()
|
|
|
|
.unwrap()
|
|
|
|
.push(path_info.to_str().unwrap().to_string())
|
|
|
|
}
|
|
|
|
Self {
|
|
|
|
index: 0,
|
|
|
|
text,
|
|
|
|
current_char,
|
|
|
|
sections: Vec::new(),
|
|
|
|
section_nesting: 0,
|
|
|
|
section_return: None,
|
|
|
|
path,
|
|
|
|
paths,
|
|
|
|
wg: WaitGroup::new(),
|
|
|
|
is_child,
|
|
|
|
inline_break_at: Vec::new(),
|
|
|
|
document: Document::new(!is_child),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn get_text(&self) -> String {
|
|
|
|
self.text
|
|
|
|
.iter()
|
|
|
|
.fold("".to_string(), |a, b| format!("{}{}", a, b))
|
|
|
|
}
|
|
|
|
|
|
|
|
/// transform an import path to be relative to the current parsers file
|
|
|
|
fn transform_path(&mut self, path: String) -> String {
|
|
|
|
let mut path = path;
|
|
|
|
let first_path_info = Path::new(&path);
|
|
|
|
if first_path_info.is_absolute() {
|
|
|
|
return first_path_info.to_str().unwrap().to_string();
|
|
|
|
}
|
|
|
|
if let Some(selfpath) = &self.path {
|
|
|
|
let path_info = Path::new(&selfpath);
|
|
|
|
if path_info.is_file() {
|
|
|
|
if let Some(dir) = path_info.parent() {
|
|
|
|
path = format!("{}/{}", dir.to_str().unwrap(), path);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
let path_info = Path::new(&path);
|
|
|
|
return path_info.to_str().unwrap().to_string();
|
|
|
|
}
|
|
|
|
|
|
|
|
/// starts up a new thread to parse the imported document
|
|
|
|
fn import_document(&mut self, path: String) -> Result<Arc<Mutex<ImportAnchor>>, ParseError> {
|
|
|
|
let path = self.transform_path(path);
|
|
|
|
let path_info = Path::new(&path);
|
|
|
|
if !path_info.exists() || !path_info.is_file() {
|
|
|
|
println!(
|
|
|
|
"{}Import of \"{}\" failed: The file doesn't exist.{}",
|
|
|
|
Fg(color::Yellow),
|
|
|
|
path,
|
|
|
|
style::Reset
|
|
|
|
);
|
|
|
|
return Err(ParseError::new_with_message(
|
|
|
|
self.index,
|
|
|
|
"file does not exist",
|
|
|
|
));
|
|
|
|
}
|
|
|
|
{
|
|
|
|
let mut paths = self.paths.lock().unwrap();
|
|
|
|
if paths.iter().find(|item| **item == path) != None {
|
|
|
|
println!(
|
|
|
|
"{}Import of \"{}\" failed: Cyclic import.{}",
|
|
|
|
Fg(color::Yellow),
|
|
|
|
path,
|
|
|
|
style::Reset
|
|
|
|
);
|
|
|
|
return Err(ParseError::new_with_message(self.index, "cyclic import"));
|
|
|
|
}
|
|
|
|
paths.push(path.clone());
|
|
|
|
}
|
|
|
|
let anchor = Arc::new(Mutex::new(ImportAnchor::new()));
|
|
|
|
let anchor_clone = Arc::clone(&anchor);
|
|
|
|
let wg = self.wg.clone();
|
|
|
|
let paths = Arc::clone(&self.paths);
|
|
|
|
|
|
|
|
let _ = thread::spawn(move || {
|
|
|
|
let text = read_to_string(path.clone()).unwrap();
|
|
|
|
|
|
|
|
let mut parser = Parser::new_as_child(text.to_string(), path, paths);
|
|
|
|
let document = parser.parse();
|
|
|
|
anchor_clone.lock().unwrap().set_document(document);
|
|
|
|
|
|
|
|
drop(wg);
|
|
|
|
});
|
|
|
|
|
|
|
|
Ok(anchor)
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses the given text into a document
|
|
|
|
pub fn parse(&mut self) -> Document {
|
|
|
|
self.document.path = self.path.clone();
|
|
|
|
|
|
|
|
while self.index < self.text.len() {
|
|
|
|
match self.parse_block() {
|
|
|
|
Ok(block) => self.document.add_element(block),
|
|
|
|
Err(err) => {
|
|
|
|
if let Some(path) = &self.path {
|
|
|
|
if let Some(position) = err.get_position(&self.get_text()) {
|
|
|
|
println!(
|
|
|
|
"{} Error in File {}:{}:{} - {}",
|
|
|
|
Fg(color::Red),
|
|
|
|
path,
|
|
|
|
position.0,
|
|
|
|
position.1,
|
|
|
|
err
|
|
|
|
);
|
|
|
|
} else {
|
|
|
|
println!("{} Error in File {}: {}", Fg(color::Red), path, err);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
println!("{}", err);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
let wg = self.wg.clone();
|
|
|
|
self.wg = WaitGroup::new();
|
|
|
|
wg.wait();
|
|
|
|
if !self.is_child {
|
|
|
|
self.document.process_placeholders();
|
|
|
|
}
|
|
|
|
let document = self.document.clone();
|
|
|
|
self.document = Document::new(!self.is_child);
|
|
|
|
|
|
|
|
document
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Parses a block Token
|
|
|
|
pub fn parse_block(&mut self) -> Result<Block, ParseError> {
|
|
|
|
if let Some(section) = self.section_return {
|
|
|
|
if section <= self.section_nesting && (self.section_nesting > 0) {
|
|
|
|
return Err(ParseError::new_with_message(
|
|
|
|
self.index,
|
|
|
|
"invalid section nesting",
|
|
|
|
));
|
|
|
|
} else {
|
|
|
|
self.section_return = None;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
let token = if let Ok(section) = self.parse_section() {
|
|
|
|
Block::Section(section)
|
|
|
|
} else if let Some(_) = self.section_return {
|
|
|
|
return Err(ParseError::new(self.index));
|
|
|
|
} else if let Ok(list) = self.parse_list() {
|
|
|
|
Block::List(list)
|
|
|
|
} else if let Ok(table) = self.parse_table() {
|
|
|
|
Block::Table(table)
|
|
|
|
} else if let Ok(code_block) = self.parse_code_block() {
|
|
|
|
Block::CodeBlock(code_block)
|
|
|
|
} else if let Ok(quote) = self.parse_quote() {
|
|
|
|
Block::Quote(quote)
|
|
|
|
} else if let Ok(import) = self.parse_import() {
|
|
|
|
Block::Import(import)
|
|
|
|
} else if let Some(_) = self.section_return {
|
|
|
|
return Err(ParseError::new(self.index));
|
|
|
|
} else if let Ok(pholder) = self.parse_placeholder() {
|
|
|
|
Block::Placeholder(pholder)
|
|
|
|
} else if let Ok(paragraph) = self.parse_paragraph() {
|
|
|
|
Block::Paragraph(paragraph)
|
|
|
|
} else {
|
|
|
|
return Err(ParseError::new(self.index));
|
|
|
|
};
|
|
|
|
|
|
|
|
Ok(token)
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Parses a section that consists of a header and one or more blocks
|
|
|
|
fn parse_section(&mut self) -> Result<Section, ParseError> {
|
|
|
|
let start_index = self.index;
|
|
|
|
self.seek_whitespace();
|
|
|
|
if self.check_special(&HASH) {
|
|
|
|
let mut size = 1;
|
|
|
|
while let Some(_) = self.next_char() {
|
|
|
|
if !self.check_special(&HASH) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
size += 1;
|
|
|
|
}
|
|
|
|
let mut metadata = None;
|
|
|
|
if let Ok(meta) = self.parse_inline_metadata() {
|
|
|
|
metadata = Some(meta);
|
|
|
|
}
|
|
|
|
if size <= self.section_nesting || !self.current_char.is_whitespace() {
|
|
|
|
if size <= self.section_nesting {
|
|
|
|
self.section_return = Some(size);
|
|
|
|
}
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
let mut header = self.parse_header()?;
|
|
|
|
header.size = size;
|
|
|
|
self.section_nesting = size;
|
|
|
|
self.sections.push(size);
|
|
|
|
let mut section = Section::new(header);
|
|
|
|
section.metadata = metadata;
|
|
|
|
self.seek_whitespace();
|
|
|
|
|
|
|
|
while let Ok(block) = self.parse_block() {
|
|
|
|
section.add_element(block);
|
|
|
|
}
|
|
|
|
|
|
|
|
self.sections.pop();
|
|
|
|
if let Some(sec) = self.sections.last() {
|
|
|
|
self.section_nesting = *sec
|
|
|
|
} else {
|
|
|
|
self.section_nesting = 0;
|
|
|
|
}
|
|
|
|
Ok(section)
|
|
|
|
} else {
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses the header of a section
|
|
|
|
fn parse_header(&mut self) -> Result<Header, ParseError> {
|
|
|
|
let start_index = self.index;
|
|
|
|
let line = self.parse_line()?;
|
|
|
|
let mut anchor = String::new();
|
|
|
|
self.text[start_index..self.index]
|
|
|
|
.iter()
|
|
|
|
.for_each(|e| anchor.push(*e));
|
|
|
|
anchor.retain(|c| !c.is_whitespace());
|
|
|
|
Ok(Header::new(line, anchor))
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses a code block
|
|
|
|
fn parse_code_block(&mut self) -> Result<CodeBlock, ParseError> {
|
|
|
|
self.seek_whitespace();
|
|
|
|
self.assert_special_sequence(&SQ_CODE_BLOCK, self.index)?;
|
|
|
|
self.skip_char();
|
|
|
|
let language = self.get_string_until(&[LB], &[])?;
|
|
|
|
self.skip_char();
|
|
|
|
let text = self.get_string_until_sequence(&[&SQ_CODE_BLOCK], &[])?;
|
|
|
|
for _ in 0..2 {
|
|
|
|
self.skip_char();
|
|
|
|
}
|
|
|
|
|
|
|
|
Ok(CodeBlock {
|
|
|
|
language,
|
|
|
|
code: text,
|
|
|
|
})
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses a quote
|
|
|
|
fn parse_quote(&mut self) -> Result<Quote, ParseError> {
|
|
|
|
let start_index = self.index;
|
|
|
|
self.seek_whitespace();
|
|
|
|
let metadata = if let Ok(meta) = self.parse_inline_metadata() {
|
|
|
|
Some(meta)
|
|
|
|
} else {
|
|
|
|
None
|
|
|
|
};
|
|
|
|
if self.check_special(&META_CLOSE) {
|
|
|
|
if self.next_char() == None {
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
let mut quote = Quote::new(metadata);
|
|
|
|
|
|
|
|
while self.check_special("E_START)
|
|
|
|
&& self.next_char() != None
|
|
|
|
&& (self.check_seek_inline_whitespace() || self.check_special(&LB))
|
|
|
|
{
|
|
|
|
if let Ok(text) = self.parse_text_line() {
|
|
|
|
if text.subtext.len() > 0 {
|
|
|
|
quote.add_text(text);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if quote.text.len() == 0 {
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
|
|
|
|
Ok(quote)
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Parses metadata
|
|
|
|
pub(crate) fn parse_inline_metadata(&mut self) -> Result<InlineMetadata, ParseError> {
|
|
|
|
let start_index = self.index;
|
|
|
|
self.assert_special(&META_OPEN, start_index)?;
|
|
|
|
self.skip_char();
|
|
|
|
|
|
|
|
let mut values = HashMap::new();
|
|
|
|
while let Ok((key, value)) = self.parse_metadata_pair() {
|
|
|
|
values.insert(key, value);
|
|
|
|
if self.check_special(&META_CLOSE) || self.check_linebreak() {
|
|
|
|
// abort the parsing of the inner content when encountering a closing tag or linebreak
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if self.check_special(&META_CLOSE) {
|
|
|
|
self.skip_char();
|
|
|
|
}
|
|
|
|
if values.len() == 0 {
|
|
|
|
// if there was a linebreak (the metadata wasn't closed) or there is no inner data
|
|
|
|
// return an error
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
|
|
|
|
Ok(InlineMetadata { data: values })
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses a key-value metadata pair
|
|
|
|
fn parse_metadata_pair(&mut self) -> Result<(String, MetadataValue), ParseError> {
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
let name = self.get_string_until(&[META_CLOSE, EQ, SPACE, LB], &[])?;
|
|
|
|
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
let mut value = MetadataValue::Bool(true);
|
|
|
|
if self.check_special(&EQ) {
|
|
|
|
self.skip_char();
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
if let Ok(ph) = self.parse_placeholder() {
|
|
|
|
value = MetadataValue::Placeholder(ph);
|
|
|
|
} else {
|
|
|
|
let quoted_string = self.check_special_group("ES);
|
|
|
|
let parse_until = if quoted_string {
|
|
|
|
let quote_start = self.current_char;
|
|
|
|
self.skip_char();
|
|
|
|
vec![quote_start, META_CLOSE, LB]
|
|
|
|
} else {
|
|
|
|
vec![META_CLOSE, LB, SPACE]
|
|
|
|
};
|
|
|
|
let raw_value = self.get_string_until(&parse_until, &[])?;
|
|
|
|
if self.check_special_group("ES) {
|
|
|
|
self.skip_char();
|
|
|
|
}
|
|
|
|
value = if quoted_string {
|
|
|
|
MetadataValue::String(raw_value)
|
|
|
|
} else if raw_value.to_lowercase().as_str() == "true" {
|
|
|
|
MetadataValue::Bool(true)
|
|
|
|
} else if raw_value.to_lowercase().as_str() == "false" {
|
|
|
|
MetadataValue::Bool(false)
|
|
|
|
} else if let Ok(num) = raw_value.parse::<i64>() {
|
|
|
|
MetadataValue::Integer(num)
|
|
|
|
} else if let Ok(num) = raw_value.parse::<f64>() {
|
|
|
|
MetadataValue::Float(num)
|
|
|
|
} else {
|
|
|
|
MetadataValue::String(raw_value)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
Ok((name, value))
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses an import and starts a new task to parse the document of the import
|
|
|
|
fn parse_import(&mut self) -> Result<Import, ParseError> {
|
|
|
|
let start_index = self.index;
|
|
|
|
self.seek_whitespace();
|
|
|
|
self.assert_special_sequence_group(&[&[IMPORT_START, IMPORT_OPEN]], start_index)?;
|
|
|
|
let mut path = String::new();
|
|
|
|
while let Some(character) = self.next_char() {
|
|
|
|
if self.check_linebreak() || self.check_special(&IMPORT_CLOSE) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
path.push(character);
|
|
|
|
}
|
|
|
|
if self.check_linebreak() || path.is_empty() {
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
if self.check_special(&IMPORT_CLOSE) {
|
|
|
|
parse_option!(self.next_char(), self.index);
|
|
|
|
}
|
|
|
|
// parsing success
|
|
|
|
|
|
|
|
if self.section_nesting > 0 {
|
|
|
|
self.section_return = Some(0);
|
|
|
|
let err = ParseError::new_with_message(self.index, "import section nesting error");
|
|
|
|
self.revert_to(start_index)?;
|
|
|
|
return Err(err);
|
|
|
|
}
|
|
|
|
|
|
|
|
self.seek_whitespace();
|
|
|
|
|
|
|
|
if let Ok(anchor) = self.import_document(path.clone()) {
|
|
|
|
Ok(Import { path, anchor })
|
|
|
|
} else {
|
|
|
|
Err(ParseError::new(self.index))
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Parses a paragraph
|
|
|
|
fn parse_paragraph(&mut self) -> Result<Paragraph, ParseError> {
|
|
|
|
self.seek_whitespace();
|
|
|
|
let mut paragraph = Paragraph::new();
|
|
|
|
while let Ok(token) = self.parse_line() {
|
|
|
|
paragraph.add_element(token);
|
|
|
|
let start_index = self.index;
|
|
|
|
if self.check_special_sequence_group(&BLOCK_SPECIAL_CHARS) {
|
|
|
|
self.revert_to(start_index)?;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
self.revert_to(start_index)?;
|
|
|
|
}
|
|
|
|
|
|
|
|
if paragraph.elements.len() > 0 {
|
|
|
|
Ok(paragraph)
|
|
|
|
} else {
|
|
|
|
Err(ParseError::new(self.index))
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses a list which consists of one or more list items
|
|
|
|
/// The parsing is done iterative to resolve nested items
|
|
|
|
fn parse_list(&mut self) -> Result<List, ParseError> {
|
|
|
|
let mut list = List::new();
|
|
|
|
let start_index = self.index;
|
|
|
|
self.seek_whitespace();
|
|
|
|
|
|
|
|
let ordered = if self.check_special_group(&LIST_SPECIAL_CHARS) {
|
|
|
|
false
|
|
|
|
} else {
|
|
|
|
true
|
|
|
|
};
|
|
|
|
list.ordered = ordered;
|
|
|
|
let mut list_hierarchy: Vec<ListItem> = Vec::new();
|
|
|
|
while let Ok(mut item) = self.parse_list_item() {
|
|
|
|
while let Some(parent_item) = list_hierarchy.pop() {
|
|
|
|
if parent_item.level < item.level {
|
|
|
|
// the parent item is the actual parent of the next item
|
|
|
|
list_hierarchy.push(parent_item);
|
|
|
|
break;
|
|
|
|
} else if parent_item.level == item.level {
|
|
|
|
// the parent item is a sibling and has to be appended to a parent
|
|
|
|
if list_hierarchy.is_empty() {
|
|
|
|
list.add_item(parent_item);
|
|
|
|
} else {
|
|
|
|
let mut parent_parent = list_hierarchy.pop().unwrap();
|
|
|
|
parent_parent.add_child(parent_item);
|
|
|
|
list_hierarchy.push(parent_parent);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
// the parent item is a child of a sibling of the current item
|
|
|
|
if list_hierarchy.is_empty() {
|
|
|
|
item.add_child(parent_item);
|
|
|
|
} else {
|
|
|
|
let mut parent_parent = list_hierarchy.pop().unwrap();
|
|
|
|
parent_parent.add_child(parent_item);
|
|
|
|
list_hierarchy.push(parent_parent);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
list_hierarchy.push(item);
|
|
|
|
}
|
|
|
|
|
|
|
|
// the remaining items in the hierarchy need to be combined
|
|
|
|
while let Some(item) = list_hierarchy.pop() {
|
|
|
|
if !list_hierarchy.is_empty() {
|
|
|
|
let mut parent_item = list_hierarchy.pop().unwrap();
|
|
|
|
parent_item.add_child(item);
|
|
|
|
list_hierarchy.push(parent_item);
|
|
|
|
} else {
|
|
|
|
list_hierarchy.push(item);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
list.items.append(&mut list_hierarchy);
|
|
|
|
|
|
|
|
if list.items.len() > 0 {
|
|
|
|
Ok(list)
|
|
|
|
} else {
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses a single list item defined with -
|
|
|
|
fn parse_list_item(&mut self) -> Result<ListItem, ParseError> {
|
|
|
|
let start_index = self.index;
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
let level = self.index - start_index;
|
|
|
|
self.assert_special_group(&LIST_SPECIAL_CHARS, start_index)?;
|
|
|
|
let ordered = self.current_char.is_numeric();
|
|
|
|
self.skip_char();
|
|
|
|
if self.check_special(&DOT) {
|
|
|
|
self.skip_char();
|
|
|
|
}
|
|
|
|
if !self.check_seek_inline_whitespace() {
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
if self.check_special(&MINUS) {
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
|
|
|
|
let item = ListItem::new(self.parse_line()?, level as u16, ordered);
|
|
|
|
|
|
|
|
Ok(item)
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses a markdown table
|
|
|
|
fn parse_table(&mut self) -> Result<Table, ParseError> {
|
|
|
|
let header = self.parse_row()?;
|
|
|
|
if self.check_linebreak() {
|
|
|
|
self.skip_char();
|
|
|
|
}
|
|
|
|
let seek_index = self.index;
|
|
|
|
let mut table = Table::new(header);
|
|
|
|
while let Some(_) = self.next_char() {
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
if !self.check_special_group(&[MINUS, PIPE]) || self.check_linebreak() {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if !self.check_linebreak() {
|
|
|
|
self.revert_to(seek_index)?;
|
|
|
|
return Ok(table);
|
|
|
|
}
|
|
|
|
|
|
|
|
self.seek_whitespace();
|
|
|
|
while let Ok(row) = self.parse_row() {
|
|
|
|
table.add_row(row);
|
|
|
|
}
|
|
|
|
|
|
|
|
Ok(table)
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses a table row/head
|
|
|
|
pub fn parse_row(&mut self) -> Result<Row, ParseError> {
|
|
|
|
let start_index = self.index;
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
self.assert_special(&PIPE, start_index)?;
|
|
|
|
self.skip_char();
|
|
|
|
if self.check_special(&PIPE) {
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
self.inline_break_at.push(PIPE);
|
|
|
|
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
let mut row = Row::new();
|
|
|
|
loop {
|
|
|
|
let mut element = TextLine::new();
|
|
|
|
while let Ok(inline) = self.parse_inline() {
|
|
|
|
element.subtext.push(inline);
|
|
|
|
if self.check_linebreak() || self.check_special(&PIPE) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
row.add_cell(Cell {
|
|
|
|
text: Line::Text(element),
|
|
|
|
});
|
|
|
|
if self.check_special(&PIPE) {
|
|
|
|
self.skip_char();
|
|
|
|
}
|
|
|
|
if self.check_linebreak() {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
}
|
|
|
|
self.inline_break_at.clear();
|
|
|
|
if self.check_special(&PIPE) {
|
|
|
|
self.skip_char();
|
|
|
|
self.skip_char();
|
|
|
|
} else {
|
|
|
|
self.skip_char();
|
|
|
|
}
|
|
|
|
|
|
|
|
if row.cells.len() > 0 {
|
|
|
|
Ok(row)
|
|
|
|
} else {
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses inline definitions
|
|
|
|
fn parse_line(&mut self) -> Result<Line, ParseError> {
|
|
|
|
if self.index > self.text.len() {
|
|
|
|
Err(ParseError::new(self.index))
|
|
|
|
} else {
|
|
|
|
if let Ok(ruler) = self.parse_ruler() {
|
|
|
|
Ok(Line::Ruler(ruler))
|
|
|
|
} else if let Ok(centered) = self.parse_centered() {
|
|
|
|
Ok(Line::Centered(centered))
|
|
|
|
} else if let Ok(text) = self.parse_text_line() {
|
|
|
|
Ok(Line::Text(text))
|
|
|
|
} else {
|
|
|
|
Err(ParseError::new(self.index))
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses centered text
|
|
|
|
fn parse_centered(&mut self) -> Result<Centered, ParseError> {
|
|
|
|
let start_index = self.index;
|
|
|
|
self.assert_special_sequence(&SQ_CENTERED_START, start_index)?;
|
|
|
|
self.skip_char();
|
|
|
|
let line = self.parse_text_line()?;
|
|
|
|
|
|
|
|
Ok(Centered { line })
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses a placeholder element
|
|
|
|
pub(crate) fn parse_placeholder(&mut self) -> Result<Arc<Mutex<Placeholder>>, ParseError> {
|
|
|
|
let start_index = self.index;
|
|
|
|
self.assert_special_sequence(&SQ_PHOLDER_START, self.index)?;
|
|
|
|
self.skip_char();
|
|
|
|
let name = if let Ok(name_str) = self.get_string_until_sequence(&[&SQ_PHOLDER_STOP], &[LB])
|
|
|
|
{
|
|
|
|
name_str
|
|
|
|
} else {
|
|
|
|
return Err(self.revert_with_error(start_index));
|
|
|
|
};
|
|
|
|
self.skip_char();
|
|
|
|
|
|
|
|
let metadata = if let Ok(meta) = self.parse_inline_metadata() {
|
|
|
|
Some(meta)
|
|
|
|
} else {
|
|
|
|
None
|
|
|
|
};
|
|
|
|
|
|
|
|
let placeholder = Arc::new(Mutex::new(Placeholder::new(name, metadata)));
|
|
|
|
self.document.add_placeholder(Arc::clone(&placeholder));
|
|
|
|
|
|
|
|
Ok(placeholder)
|
|
|
|
}
|
|
|
|
|
|
|
|
/// parses a ruler
|
|
|
|
fn parse_ruler(&mut self) -> Result<Ruler, ParseError> {
|
|
|
|
let start_index = self.index;
|
|
|
|
self.seek_inline_whitespace();
|
|
|
|
self.assert_special_sequence(&SQ_RULER, start_index)?;
|
|
|
|
self.seek_until_linebreak();
|
|
|
|
Ok(Ruler {})
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Parses a line of text
|
|
|
|
fn parse_text_line(&mut self) -> Result<TextLine, ParseError> {
|
|
|
|
let mut text = TextLine::new();
|
|
|
|
while let Ok(subtext) = self.parse_inline() {
|
|
|
|
text.add_subtext(subtext);
|
|
|
|
let current_index = self.index;
|
|
|
|
if self.next_char() == None {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
self.revert_to(current_index)?;
|
|
|
|
}
|
|
|
|
|
|
|
|
if self.check_linebreak() {
|
|
|
|
parse_option!(self.next_char(), self.index);
|
|
|
|
}
|
|
|
|
|
|
|
|
Ok(text)
|
|
|
|
}
|
|
|
|
}
|