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'use strict';
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function escapeHTML(str) {
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return str.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>');
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}
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var MD_UNESCAPE_RE = /\\([!"#$%&\'()*+,.\/:;<=>?@[\\\]^_`{|}~-])/g;
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function unescapeMD(str) {
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return str.replace(MD_UNESCAPE_RE, '$1');
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}
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function joinLines(state, begin, end) {
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return state.src.slice(
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state.bMarks[begin],
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end < state.lineMax ? state.bMarks[end] : state.src.length
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);
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}
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var rules = {};
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rules.blockquote_open = function (state, token) {
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state.result += '<blockquote>';
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};
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rules.blockquote_close = function (state, token) {
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state.result += '</blockquote>\n';
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};
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rules.code = function (state, token) {
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var content = joinLines(state, token.startLine, token.endLine).replace(/^ {4}/gm, '');
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state.result += '<pre><code>' + escapeHTML(content) + '</code></pre>\n';
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};
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rules.fence = function (state, token) {
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var content = joinLines(state, token.startLine, token.endLine);
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var langMark = '';
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if (token.params.length) {
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langMark = ' class="language-' + escapeHTML(token.params[0]) + '"';
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}
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state.result += '<pre><code' + langMark + '>' + escapeHTML(content) + '</code></pre>\n';
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};
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rules.heading_open = function (state, token) {
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state.result += '<h' + token.level + '>';
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};
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rules.heading_close = function (state, token) {
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state.result += '</h' + token.level + '>\n';
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};
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rules.hr = function (state, token) {
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state.result += '<hr>\n';
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};
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rules.paragraph_open = function (state, token) {
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state.result += '<p>';
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};
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rules.paragraph_close = function (state, token) {
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state.result += '</p>\n';
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};
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rules.text = function (state, token) {
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state.result += escapeHTML(unescapeMD(state.src.slice(token.begin, token.end)));
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};
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// TODO: Stub. Do extendable.
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function Renderer() {
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}
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Renderer.prototype.render = function (state) {
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var i, len, rule,
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tokens = state.tokens;
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for (i = 0, len = tokens.length; i < len; i++) {
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rule = rules[tokens[i].type];
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// TODO: temporary check
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if (!rule) {
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throw Error('Renderer error: unknown token ' + tokens[i].type);
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}
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rule(state, tokens[i]);
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}
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return state.result;
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};
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module.exports = Renderer;
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