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// Inline parser
'use strict';
var Ruler = require('./ruler');
var StateInline = require('./rules_inline/state_inline');
////////////////////////////////////////////////////////////////////////////////
// Parser rules
var rules = [];
// Pure text
rules.push(require('./rules_inline/text'));
rules.push(require('./rules_inline/newline'));
rules.push(require('./rules_inline/escape'));
rules.push(require('./rules_inline/backticks'));
rules.push(require('./rules_inline/strikethrough'));
rules.push(require('./rules_inline/emphasis'));
rules.push(require('./rules_inline/links'));
rules.push(require('./rules_inline/autolink'));
rules.push(require('./rules_inline/htmltag'));
rules.push(require('./rules_inline/entity'));
rules.push(require('./rules_inline/escape_html_char'));
function validateLink(url) {
if (url.indexOf('javas' + 'cript:') === 0) { return false; }
return true;
}
// Inline Parser class
//
function ParserInline() {
this._rules = [];
// Rule to skip pure text
// - '{$%@}' reserved for extentions
// - '<>"' added for internal html escaping
this.textMatch = /^[^\n\\`*_\[\]!&{}$%@<>"~]+/;
// 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(this.rulesUpdate.bind(this));
for (var i = 0; i < rules.length; i++) {
this.ruler.after(rules[i]);
}
}
ParserInline.prototype.rulesUpdate = function () {
this._rules = this.ruler.getRules();
};
// Skip single token by running all rules in validation mode;
// returns `true` if any rule reported success
//
ParserInline.prototype.skipToken = function (state) {
var i, pos = state.pos,
rules = this._rules,
len = this._rules.length;
if (state.memo[pos] !== undefined) {
state.pos = state.memo[pos];
return true;
}
for (i = 0; i < len; i++) {
if (rules[i](state, true)) {
state.memo[pos] = state.pos;
return true;
}
}
return false;
};
// Generate tokens for input range
//
ParserInline.prototype.tokenize = function (state) {
var ok, i,
rules = this._rules,
len = this._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();
}
return state.tokens;
};
// Parse input string.
//
ParserInline.prototype.parse = function (str, options, env) {
var state = new StateInline(str, this, options, env);
this.tokenize(state);
if (options.linkify) {
this.linkifier.process(state);
}
if (options.typographer) {
this.typographer.process(state);
}
return state.tokens;
};
module.exports = ParserInline;