Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed https://markdown-it.github.io/
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 

113 lines
2.6 KiB

// Parser state class
'use strict';
function State(src, lexerBlock, lexerInline, renderer, tokens, options) {
var ch, s, start, pos, len, indent, indent_found;
// TODO: check if we can move string replaces to parser, to avoid
// unnesessary call on shadow clone creation. Or check if we can do
// cloning more effectively. Profile first.
// Prepare string to parse:
//
// - replace tabs with spaces
// - remove `\r` to simplify newlines check (???)
this.src = src;
// Shortcuts to simplify nested calls
this.lexerBlock = lexerBlock;
this.lexerInline = lexerInline;
this.renderer = renderer;
// TODO: (?) set directly for faster access.
this.options = options;
//
// Internal state vartiables
//
this.tokens = tokens;
this.bMarks = []; // line begin offsets for fast jumps
this.eMarks = []; // line end offsets for fast jumps
this.tShift = []; // indent for each line
// Generate markers.
s = this.src;
indent = 0;
indent_found = false;
for (start = pos = indent = 0, len = s.length; pos < len; pos++) {
ch = s.charCodeAt(pos);
// TODO: check other spaces and tabs too or keep existing regexp replace ??
if (!indent_found && ch === 0x20/* space */) {
indent++;
}
if (!indent_found && ch !== 0x20/* space */) {
this.tShift.push(indent);
indent_found = true;
}
if (ch === 0x0D || ch === 0x0A) {
this.bMarks.push(start);
this.eMarks.push(pos);
indent_found = false;
indent = 0;
start = pos + 1;
}
if (ch === 0x0D && pos < len && s.charCodeAt(pos) === 0x0A) {
pos++;
start++;
}
}
if (ch !== 0x0D || ch !== 0x0A) {
this.bMarks.push(start);
this.eMarks.push(len);
this.tShift.push(indent);
}
// Push fake entry to simplify cache bounds checks
this.bMarks.push(s.length);
this.eMarks.push(s.length);
this.tShift.push(0);
// inline lexer variables
this.pos = 0; // char index in src
// block lexer variables
this.blkLevel = 0;
this.blkIndent = 0;
this.line = 0; // line index in src
this.lineMax = this.bMarks.length - 1; // don't count last fake line
this.tight = false; // loose/tight mode for lists
// Stuff for blockquotes
this.bqLevel = 0;
this.bqMarks = [];
for (start = 0; start < this.bMarks.length; start++) {
this.bqMarks.push(0);
}
// renderer
this.result = '';
}
// Create shadow clone of curent state with new input data
State.prototype.clone = function clone(src) {
return new State(
src,
this.lexerBlock,
this.lexerInline,
this.renderer,
this.tokens,
this.options
);
};
module.exports = State;