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// Block parser
'use strict';
var Ruler = require('./ruler');
var StateBlock = require('./rules_block/state_block');
var _rules = [
[ 'code', require('./rules_block/code') ],
[ 'fences', require('./rules_block/fences'), [ 'paragraph', 'blockquote', 'list' ] ],
[ 'blockquote', require('./rules_block/blockquote'), [ 'paragraph', 'blockquote', 'list' ] ],
[ 'hr', require('./rules_block/hr'), [ 'paragraph', 'blockquote', 'list' ] ],
[ 'list', require('./rules_block/list'), [ 'paragraph', 'blockquote' ] ],
[ 'footnote', require('./rules_block/footnote'), [ 'paragraph' ] ],
[ 'heading', require('./rules_block/heading'), [ 'paragraph', 'blockquote' ] ],
[ 'lheading', require('./rules_block/lheading') ],
[ 'htmlblock', require('./rules_block/htmlblock'), [ 'paragraph', 'blockquote' ] ],
[ 'table', require('./rules_block/table'), [ 'paragraph' ] ],
[ 'deflist', require('./rules_block/deflist'), [ 'paragraph' ] ],
[ 'paragraph', require('./rules_block/paragraph') ]
];
// Block Parser class
//
function ParserBlock() {
this.ruler = new Ruler();
for (var i = 0; i < _rules.length; i++) {
this.ruler.push(_rules[i][0], _rules[i][1], { alt: (_rules[i][2] || []).slice() });
}
}
// Generate tokens for input range
//
ParserBlock.prototype.tokenize = function (state, startLine, endLine) {
var ok, i,
rules = this.ruler.getRules(''),
len = rules.length,
line = startLine,
hasEmptyLines = false;
while (line < endLine) {
state.line = line = state.skipEmptyLines(line);
if (line >= endLine) { break; }
// Termination condition for nested calls.
// Nested calls currently used for blockquotes & lists
if (state.tShift[line] < state.blkIndent) { break; }
// Try all possible rules.
// On success, rule should:
//
// - update `state.line`
// - update `state.tokens`
// - return true
for (i = 0; i < len; i++) {
ok = rules[i](state, line, endLine, false);
if (ok) { break; }
}
// set state.tight iff we had an empty line before current tag
// i.e. latest empty line should not count
state.tight = !hasEmptyLines;
// paragraph might "eat" one newline after it in nested lists
if (state.isEmpty(state.line - 1)) {
hasEmptyLines = true;
}
line = state.line;
if (line < endLine && state.isEmpty(line)) {
hasEmptyLines = true;
line++;
// two empty lines should stop the parser in list mode
if (line < endLine && state.parentType === 'list' && state.isEmpty(line)) { break; }
state.line = line;
}
}
};
var TABS_SCAN_RE = /[\n\t]/g;
var NEWLINES_RE = /\r[\n\u0085]|[\u2424\u2028\u0085]/g;
var SPACES_RE = /\u00a0/g;
ParserBlock.prototype.parse = function (src, options, env, outTokens) {
var state, lineStart = 0, lastTabPos = 0;
if (!src) { return []; }
// Normalize spaces
src = src.replace(SPACES_RE, ' ');
// Normalize newlines
src = src.replace(NEWLINES_RE, '\n');
// Replace tabs with proper number of spaces (1..4)
if (src.indexOf('\t') >= 0) {
src = src.replace(TABS_SCAN_RE, function (match, offset) {
var result;
if (src.charCodeAt(offset) === 0x0A) {
lineStart = offset + 1;
lastTabPos = 0;
return match;
}
result = ' '.slice((offset - lineStart - lastTabPos) % 4);
lastTabPos = offset - lineStart + 1;
return result;
});
}
state = new StateBlock(
src,
this,
options,
env,
outTokens
);
this.tokenize(state, state.line, state.lineMax);
};
module.exports = ParserBlock;