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// Inline parser
'use strict';
var Ruler = require('./ruler');
var StateInline = require('./rules_inline/state_inline');
var replaceEntities = require('./common/utils').replaceEntities;
////////////////////////////////////////////////////////////////////////////////
// Parser rules
var _rules = [
[ 'text', require('./rules_inline/text') ],
[ 'newline', require('./rules_inline/newline') ],
[ 'escape', require('./rules_inline/escape') ],
[ 'backticks', require('./rules_inline/backticks') ],
[ 'del', require('./rules_inline/del') ],
[ 'ins', require('./rules_inline/ins') ],
[ 'mark', require('./rules_inline/mark') ],
[ 'emphasis', require('./rules_inline/emphasis') ],
[ 'sub', require('./rules_inline/sub') ],
[ 'sup', require('./rules_inline/sup') ],
[ 'links', require('./rules_inline/links') ],
[ 'footnote_inline', require('./rules_inline/footnote_inline') ],
[ 'footnote_ref', require('./rules_inline/footnote_ref') ],
[ 'autolink', require('./rules_inline/autolink') ],
[ 'htmltag', require('./rules_inline/htmltag') ],
[ 'entity', require('./rules_inline/entity') ]
];
var BAD_PROTOCOLS = [ 'vbscript', 'javascript', 'file' ];
function validateLink(url) {
var str = url.trim().toLowerCase();
// Care about digital entities "javascript:alert(1)"
str = replaceEntities(str);
if (str.indexOf(':') >= 0 && BAD_PROTOCOLS.indexOf(str.split(':')[0]) >= 0) {
return false;
}
return true;
}
// Inline Parser class
//
function ParserInline() {
// By default CommonMark allows too much in links
// If you need to restrict it - override this with your validator.
this.validateLink = validateLink;
this.ruler = new Ruler();
for (var i = 0; i < _rules.length; i++) {
this.ruler.push(_rules[i][0], _rules[i][1]);
}
}
// Skip single token by running all rules in validation mode;
// returns `true` if any rule reported success
//
ParserInline.prototype.skipToken = function (state) {
var i, cached_pos, pos = state.pos,
rules = this.ruler.getRules(''),
len = rules.length;
if ((cached_pos = state.cacheGet(pos)) > 0) {
state.pos = cached_pos;
return;
}
for (i = 0; i < len; i++) {
if (rules[i](state, true)) {
state.cacheSet(pos, state.pos);
return;
}
}
state.pos++;
state.cacheSet(pos, state.pos);
};
// Generate tokens for input range
//
ParserInline.prototype.tokenize = function (state) {
var ok, i,
rules = this.ruler.getRules(''),
len = rules.length,
end = state.posMax;
while (state.pos < end) {
// Try all possible rules.
// On success, rule should:
//
// - update `state.pos`
// - update `state.tokens`
// - return true
for (i = 0; i < len; i++) {
ok = rules[i](state, false);
if (ok) { break; }
}
if (ok) {
if (state.pos >= end) { break; }
continue;
}
state.pending += state.src[state.pos++];
}
if (state.pending) {
state.pushPending();
}
};
// Parse input string.
//
ParserInline.prototype.parse = function (str, options, env, outTokens) {
var state = new StateInline(str, this, options, env, outTokens);
this.tokenize(state);
};
module.exports = ParserInline;