// CodeMirror, copyright © by Marijn Haverbeke and others // Distributed under an MIT license: codemirror.net/LICENSE

(function(mod) {

if (typeof exports == "object" && typeof module == "object") // CommonJS
  mod(require("../../lib/codemirror", require("../xml/xml")));
else if (typeof define == "function" && define.amd) // AMD
  define(["../../lib/codemirror", "../xml/xml"], mod);
else // Plain browser env
  mod(CodeMirror);

})(function(CodeMirror) { “use strict”;

CodeMirror.defineMode(“markdown”, function(cmCfg, modeCfg) {

var htmlFound = CodeMirror.modes.hasOwnProperty("xml");
var htmlMode = CodeMirror.getMode(cmCfg, htmlFound ? {name: "xml", htmlMode: true} : "text/plain");
var aliases = {
  html: "htmlmixed",
  js: "javascript",
  json: "application/json",
  c: "text/x-csrc",
  "c++": "text/x-c++src",
  java: "text/x-java",
  csharp: "text/x-csharp",
  "c#": "text/x-csharp",
  scala: "text/x-scala"
};

var getMode = (function () {
  var i, modes = {}, mimes = {}, mime;

  var list = [];
  for (var m in CodeMirror.modes)
    if (CodeMirror.modes.propertyIsEnumerable(m)) list.push(m);
  for (i = 0; i < list.length; i++) {
    modes[list[i]] = list[i];
  }
  var mimesList = [];
  for (var m in CodeMirror.mimeModes)
    if (CodeMirror.mimeModes.propertyIsEnumerable(m))
      mimesList.push({mime: m, mode: CodeMirror.mimeModes[m]});
  for (i = 0; i < mimesList.length; i++) {
    mime = mimesList[i].mime;
    mimes[mime] = mimesList[i].mime;
  }

  for (var a in aliases) {
    if (aliases[a] in modes || aliases[a] in mimes)
      modes[a] = aliases[a];
  }

  return function (lang) {
    return modes[lang] ? CodeMirror.getMode(cmCfg, modes[lang]) : null;
  };
}());

// Should characters that affect highlighting be highlighted separate?
// Does not include characters that will be output (such as `1.` and `-` for lists)
if (modeCfg.highlightFormatting === undefined)
  modeCfg.highlightFormatting = false;

// Maximum number of nested blockquotes. Set to 0 for infinite nesting.
// Excess `>` will emit `error` token.
if (modeCfg.maxBlockquoteDepth === undefined)
  modeCfg.maxBlockquoteDepth = 0;

// Should underscores in words open/close em/strong?
if (modeCfg.underscoresBreakWords === undefined)
  modeCfg.underscoresBreakWords = true;

// Turn on fenced code blocks? ("```" to start/end)
if (modeCfg.fencedCodeBlocks === undefined) modeCfg.fencedCodeBlocks = false;

// Turn on task lists? ("- [ ] " and "- [x] ")
if (modeCfg.taskLists === undefined) modeCfg.taskLists = false;

var codeDepth = 0;

var header   = 'header'
,   code     = 'comment'
,   quote    = 'quote'
,   list1    = 'variable-2'
,   list2    = 'variable-3'
,   list3    = 'keyword'
,   hr       = 'hr'
,   image    = 'tag'
,   formatting = 'formatting'
,   linkinline = 'link'
,   linkemail = 'link'
,   linktext = 'link'
,   linkhref = 'string'
,   em       = 'em'
,   strong   = 'strong';

var hrRE = /^([*\-=_])(?:\s*\1){2,}\s*$/
,   ulRE = /^[*\-+]\s+/
,   olRE = /^[0-9]+\.\s+/
,   taskListRE = /^\[(x| )\](?=\s)/ // Must follow ulRE or olRE
,   atxHeaderRE = /^#+/
,   setextHeaderRE = /^(?:\={1,}|-{1,})$/
,   textRE = /^[^#!\[\]*_\\<>` "'(]+/;

function switchInline(stream, state, f) {
  state.f = state.inline = f;
  return f(stream, state);
}

function switchBlock(stream, state, f) {
  state.f = state.block = f;
  return f(stream, state);
}

// Blocks

function blankLine(state) {
  // Reset linkTitle state
  state.linkTitle = false;
  // Reset EM state
  state.em = false;
  // Reset STRONG state
  state.strong = false;
  // Reset state.quote
  state.quote = 0;
  if (!htmlFound && state.f == htmlBlock) {
    state.f = inlineNormal;
    state.block = blockNormal;
  }
  // Reset state.trailingSpace
  state.trailingSpace = 0;
  state.trailingSpaceNewLine = false;
  // Mark this line as blank
  state.thisLineHasContent = false;
  return null;
}

function blockNormal(stream, state) {

  var sol = stream.sol();

  var prevLineIsList = (state.list !== false);
  if (state.list !== false && state.indentationDiff >= 0) { // Continued list
    if (state.indentationDiff < 4) { // Only adjust indentation if *not* a code block
      state.indentation -= state.indentationDiff;
    }
    state.list = null;
  } else if (state.list !== false && state.indentation > 0) {
    state.list = null;
    state.listDepth = Math.floor(state.indentation / 4);
  } else if (state.list !== false) { // No longer a list
    state.list = false;
    state.listDepth = 0;
  }

  var match = null;
  if (state.indentationDiff >= 4) {
    state.indentation -= 4;
    stream.skipToEnd();
    return code;
  } else if (stream.eatSpace()) {
    return null;
  } else if (match = stream.match(atxHeaderRE)) {
    state.header = match[0].length <= 6 ? match[0].length : 6;
    if (modeCfg.highlightFormatting) state.formatting = "header";
    state.f = state.inline;
    return getType(state);
  } else if (state.prevLineHasContent && (match = stream.match(setextHeaderRE))) {
    state.header = match[0].charAt(0) == '=' ? 1 : 2;
    if (modeCfg.highlightFormatting) state.formatting = "header";
    state.f = state.inline;
    return getType(state);
  } else if (stream.eat('>')) {
    state.indentation++;
    state.quote = sol ? 1 : state.quote + 1;
    if (modeCfg.highlightFormatting) state.formatting = "quote";
    stream.eatSpace();
    return getType(state);
  } else if (stream.peek() === '[') {
    return switchInline(stream, state, footnoteLink);
  } else if (stream.match(hrRE, true)) {
    return hr;
  } else if ((!state.prevLineHasContent || prevLineIsList) && (stream.match(ulRE, false) || stream.match(olRE, false))) {
    var listType = null;
    if (stream.match(ulRE, true)) {
      listType = 'ul';
    } else {
      stream.match(olRE, true);
      listType = 'ol';
    }
    state.indentation += 4;
    state.list = true;
    state.listDepth++;
    if (modeCfg.taskLists && stream.match(taskListRE, false)) {
      state.taskList = true;
    }
    state.f = state.inline;
    if (modeCfg.highlightFormatting) state.formatting = ["list", "list-" + listType];
    return getType(state);
  } else if (modeCfg.fencedCodeBlocks && stream.match(/^```([\w+#]*)/, true)) {
    // try switching mode
    state.localMode = getMode(RegExp.$1);
    if (state.localMode) state.localState = state.localMode.startState();
    switchBlock(stream, state, local);
    if (modeCfg.highlightFormatting) state.formatting = "code-block";
    state.code = true;
    return getType(state);
  }

  return switchInline(stream, state, state.inline);
}

function htmlBlock(stream, state) {
  var style = htmlMode.token(stream, state.htmlState);
  if ((htmlFound && state.htmlState.tagStart === null && !state.htmlState.context) ||
      (state.md_inside && stream.current().indexOf(">") > -1)) {
    state.f = inlineNormal;
    state.block = blockNormal;
    state.htmlState = null;
  }
  return style;
}

function local(stream, state) {
  if (stream.sol() && stream.match(/^```/, true)) {
    state.localMode = state.localState = null;
    state.f = inlineNormal;
    state.block = blockNormal;
    if (modeCfg.highlightFormatting) state.formatting = "code-block";
    state.code = true;
    var returnType = getType(state);
    state.code = false;
    return returnType;
  } else if (state.localMode) {
    return state.localMode.token(stream, state.localState);
  } else {
    stream.skipToEnd();
    return code;
  }
}

// Inline
function getType(state) {
  var styles = [];

  if (state.formatting) {
    styles.push(formatting);

    if (typeof state.formatting === "string") state.formatting = [state.formatting];

    for (var i = 0; i < state.formatting.length; i++) {
      styles.push(formatting + "-" + state.formatting[i]);

      if (state.formatting[i] === "header") {
        styles.push(formatting + "-" + state.formatting[i] + "-" + state.header);
      }

      // Add `formatting-quote` and `formatting-quote-#` for blockquotes
      // Add `error` instead if the maximum blockquote nesting depth is passed
      if (state.formatting[i] === "quote") {
        if (!modeCfg.maxBlockquoteDepth || modeCfg.maxBlockquoteDepth >= state.quote) {
          styles.push(formatting + "-" + state.formatting[i] + "-" + state.quote);
        } else {
          styles.push("error");
        }
      }
    }
  }

  if (state.taskOpen) {
    styles.push("meta");
    return styles.length ? styles.join(' ') : null;
  }
  if (state.taskClosed) {
    styles.push("property");
    return styles.length ? styles.join(' ') : null;
  }

  if (state.linkHref) {
    styles.push(linkhref);
    return styles.length ? styles.join(' ') : null;
  }

  if (state.strong) { styles.push(strong); }
  if (state.em) { styles.push(em); }

  if (state.linkText) { styles.push(linktext); }

  if (state.code) { styles.push(code); }

  if (state.header) { styles.push(header); styles.push(header + "-" + state.header); }

  if (state.quote) {
    styles.push(quote);

    // Add `quote-#` where the maximum for `#` is modeCfg.maxBlockquoteDepth
    if (!modeCfg.maxBlockquoteDepth || modeCfg.maxBlockquoteDepth >= state.quote) {
      styles.push(quote + "-" + state.quote);
    } else {
      styles.push(quote + "-" + modeCfg.maxBlockquoteDepth);
    }
  }

  if (state.list !== false) {
    var listMod = (state.listDepth - 1) % 3;
    if (!listMod) {
      styles.push(list1);
    } else if (listMod === 1) {
      styles.push(list2);
    } else {
      styles.push(list3);
    }
  }

  if (state.trailingSpaceNewLine) {
    styles.push("trailing-space-new-line");
  } else if (state.trailingSpace) {
    styles.push("trailing-space-" + (state.trailingSpace % 2 ? "a" : "b"));
  }

  return styles.length ? styles.join(' ') : null;
}

function handleText(stream, state) {
  if (stream.match(textRE, true)) {
    return getType(state);
  }
  return undefined;
}

function inlineNormal(stream, state) {
  var style = state.text(stream, state);
  if (typeof style !== 'undefined')
    return style;

  if (state.list) { // List marker (*, +, -, 1., etc)
    state.list = null;
    return getType(state);
  }

  if (state.taskList) {
    var taskOpen = stream.match(taskListRE, true)[1] !== "x";
    if (taskOpen) state.taskOpen = true;
    else state.taskClosed = true;
    if (modeCfg.highlightFormatting) state.formatting = "task";
    state.taskList = false;
    return getType(state);
  }

  state.taskOpen = false;
  state.taskClosed = false;

  if (state.header && stream.match(/^#+$/, true)) {
    if (modeCfg.highlightFormatting) state.formatting = "header";
    return getType(state);
  }

  // Get sol() value now, before character is consumed
  var sol = stream.sol();

  var ch = stream.next();

  if (ch === '\\') {
    stream.next();
    if (modeCfg.highlightFormatting) {
      var type = getType(state);
      return type ? type + " formatting-escape" : "formatting-escape";
    }
  }

  // Matches link titles present on next line
  if (state.linkTitle) {
    state.linkTitle = false;
    var matchCh = ch;
    if (ch === '(') {
      matchCh = ')';
    }
    matchCh = (matchCh+'').replace(/([.?*+^$[\]\\(){}|-])/g, "\\$1");
    var regex = '^\\s*(?:[^' + matchCh + '\\\\]+|\\\\\\\\|\\\\.)' + matchCh;
    if (stream.match(new RegExp(regex), true)) {
      return linkhref;
    }
  }

  // If this block is changed, it may need to be updated in GFM mode
  if (ch === '`') {
    var previousFormatting = state.formatting;
    if (modeCfg.highlightFormatting) state.formatting = "code";
    var t = getType(state);
    var before = stream.pos;
    stream.eatWhile('`');
    var difference = 1 + stream.pos - before;
    if (!state.code) {
      codeDepth = difference;
      state.code = true;
      return getType(state);
    } else {
      if (difference === codeDepth) { // Must be exact
        state.code = false;
        return t;
      }
      state.formatting = previousFormatting;
      return getType(state);
    }
  } else if (state.code) {
    return getType(state);
  }

  if (ch === '!' && stream.match(/\[[^\]]*\] ?(?:\(|\[)/, false)) {
    stream.match(/\[[^\]]*\]/);
    state.inline = state.f = linkHref;
    return image;
  }

  if (ch === '[' && stream.match(/.*\](\(| ?\[)/, false)) {
    state.linkText = true;
    if (modeCfg.highlightFormatting) state.formatting = "link";
    return getType(state);
  }

  if (ch === ']' && state.linkText) {
    if (modeCfg.highlightFormatting) state.formatting = "link";
    var type = getType(state);
    state.linkText = false;
    state.inline = state.f = linkHref;
    return type;
  }

  if (ch === '<' && stream.match(/^(https?|ftps?):\/\/(?:[^\\>]|\\.)+>/, false)) {
    state.f = state.inline = linkInline;
    if (modeCfg.highlightFormatting) state.formatting = "link";
    var type = getType(state);
    if (type){
      type += " ";
    } else {
      type = "";
    }
    return type + linkinline;
  }

  if (ch === '<' && stream.match(/^[^> \\]+@(?:[^\\>]|\\.)+>/, false)) {
    state.f = state.inline = linkInline;
    if (modeCfg.highlightFormatting) state.formatting = "link";
    var type = getType(state);
    if (type){
      type += " ";
    } else {
      type = "";
    }
    return type + linkemail;
  }

  if (ch === '<' && stream.match(/^\w/, false)) {
    if (stream.string.indexOf(">") != -1) {
      var atts = stream.string.substring(1,stream.string.indexOf(">"));
      if (/markdown\s*=\s*('|"){0,1}1('|"){0,1}/.test(atts)) {
        state.md_inside = true;
      }
    }
    stream.backUp(1);
    state.htmlState = CodeMirror.startState(htmlMode);
    return switchBlock(stream, state, htmlBlock);
  }

  if (ch === '<' && stream.match(/^\/\w*?>/)) {
    state.md_inside = false;
    return "tag";
  }

  var ignoreUnderscore = false;
  if (!modeCfg.underscoresBreakWords) {
    if (ch === '_' && stream.peek() !== '_' && stream.match(/(\w)/, false)) {
      var prevPos = stream.pos - 2;
      if (prevPos >= 0) {
        var prevCh = stream.string.charAt(prevPos);
        if (prevCh !== '_' && prevCh.match(/(\w)/, false)) {
          ignoreUnderscore = true;
        }
      }
    }
  }
  if (ch === '*' || (ch === '_' && !ignoreUnderscore)) {
    if (sol && stream.peek() === ' ') {
      // Do nothing, surrounded by newline and space
    } else if (state.strong === ch && stream.eat(ch)) { // Remove STRONG
      if (modeCfg.highlightFormatting) state.formatting = "strong";
      var t = getType(state);
      state.strong = false;
      return t;
    } else if (!state.strong && stream.eat(ch)) { // Add STRONG
      state.strong = ch;
      if (modeCfg.highlightFormatting) state.formatting = "strong";
      return getType(state);
    } else if (state.em === ch) { // Remove EM
      if (modeCfg.highlightFormatting) state.formatting = "em";
      var t = getType(state);
      state.em = false;
      return t;
    } else if (!state.em) { // Add EM
      state.em = ch;
      if (modeCfg.highlightFormatting) state.formatting = "em";
      return getType(state);
    }
  } else if (ch === ' ') {
    if (stream.eat('*') || stream.eat('_')) { // Probably surrounded by spaces
      if (stream.peek() === ' ') { // Surrounded by spaces, ignore
        return getType(state);
      } else { // Not surrounded by spaces, back up pointer
        stream.backUp(1);
      }
    }
  }

  if (ch === ' ') {
    if (stream.match(/ +$/, false)) {
      state.trailingSpace++;
    } else if (state.trailingSpace) {
      state.trailingSpaceNewLine = true;
    }
  }

  return getType(state);
}

function linkInline(stream, state) {
  var ch = stream.next();

  if (ch === ">") {
    state.f = state.inline = inlineNormal;
    if (modeCfg.highlightFormatting) state.formatting = "link";
    var type = getType(state);
    if (type){
      type += " ";
    } else {
      type = "";
    }
    return type + linkinline;
  }

  stream.match(/^[^>]+/, true);

  return linkinline;
}

function linkHref(stream, state) {
  // Check if space, and return NULL if so (to avoid marking the space)
  if(stream.eatSpace()){
    return null;
  }
  var ch = stream.next();
  if (ch === '(' || ch === '[') {
    state.f = state.inline = getLinkHrefInside(ch === "(" ? ")" : "]");
    if (modeCfg.highlightFormatting) state.formatting = "link-string";
    state.linkHref = true;
    return getType(state);
  }
  return 'error';
}

function getLinkHrefInside(endChar) {
  return function(stream, state) {
    var ch = stream.next();

    if (ch === endChar) {
      state.f = state.inline = inlineNormal;
      if (modeCfg.highlightFormatting) state.formatting = "link-string";
      var returnState = getType(state);
      state.linkHref = false;
      return returnState;
    }

    if (stream.match(inlineRE(endChar), true)) {
      stream.backUp(1);
    }

    state.linkHref = true;
    return getType(state);
  };
}

function footnoteLink(stream, state) {
  if (stream.match(/^[^\]]*\]:/, false)) {
    state.f = footnoteLinkInside;
    stream.next(); // Consume [
    if (modeCfg.highlightFormatting) state.formatting = "link";
    state.linkText = true;
    return getType(state);
  }
  return switchInline(stream, state, inlineNormal);
}

function footnoteLinkInside(stream, state) {
  if (stream.match(/^\]:/, true)) {
    state.f = state.inline = footnoteUrl;
    if (modeCfg.highlightFormatting) state.formatting = "link";
    var returnType = getType(state);
    state.linkText = false;
    return returnType;
  }

  stream.match(/^[^\]]+/, true);

  return linktext;
}

function footnoteUrl(stream, state) {
  // Check if space, and return NULL if so (to avoid marking the space)
  if(stream.eatSpace()){
    return null;
  }
  // Match URL
  stream.match(/^[^\s]+/, true);
  // Check for link title
  if (stream.peek() === undefined) { // End of line, set flag to check next line
    state.linkTitle = true;
  } else { // More content on line, check if link title
    stream.match(/^(?:\s+(?:"(?:[^"\\]|\\\\|\\.)+"|'(?:[^'\\]|\\\\|\\.)+'|\((?:[^)\\]|\\\\|\\.)+\)))?/, true);
  }
  state.f = state.inline = inlineNormal;
  return linkhref;
}

var savedInlineRE = [];
function inlineRE(endChar) {
  if (!savedInlineRE[endChar]) {
    // Escape endChar for RegExp (taken from http://stackoverflow.com/a/494122/526741)
    endChar = (endChar+'').replace(/([.?*+^$[\]\\(){}|-])/g, "\\$1");
    // Match any non-endChar, escaped character, as well as the closing
    // endChar.
    savedInlineRE[endChar] = new RegExp('^(?:[^\\\\]|\\\\.)*?(' + endChar + ')');
  }
  return savedInlineRE[endChar];
}

var mode = {
  startState: function() {
    return {
      f: blockNormal,

      prevLineHasContent: false,
      thisLineHasContent: false,

      block: blockNormal,
      htmlState: null,
      indentation: 0,

      inline: inlineNormal,
      text: handleText,

      formatting: false,
      linkText: false,
      linkHref: false,
      linkTitle: false,
      em: false,
      strong: false,
      header: 0,
      taskList: false,
      list: false,
      listDepth: 0,
      quote: 0,
      trailingSpace: 0,
      trailingSpaceNewLine: false
    };
  },

  copyState: function(s) {
    return {
      f: s.f,

      prevLineHasContent: s.prevLineHasContent,
      thisLineHasContent: s.thisLineHasContent,

      block: s.block,
      htmlState: s.htmlState && CodeMirror.copyState(htmlMode, s.htmlState),
      indentation: s.indentation,

      localMode: s.localMode,
      localState: s.localMode ? CodeMirror.copyState(s.localMode, s.localState) : null,

      inline: s.inline,
      text: s.text,
      formatting: false,
      linkTitle: s.linkTitle,
      em: s.em,
      strong: s.strong,
      header: s.header,
      taskList: s.taskList,
      list: s.list,
      listDepth: s.listDepth,
      quote: s.quote,
      trailingSpace: s.trailingSpace,
      trailingSpaceNewLine: s.trailingSpaceNewLine,
      md_inside: s.md_inside
    };
  },

  token: function(stream, state) {

    // Reset state.formatting
    state.formatting = false;

    if (stream.sol()) {
      var forceBlankLine = !!state.header;

      // Reset state.header
      state.header = 0;

      if (stream.match(/^\s*$/, true) || forceBlankLine) {
        state.prevLineHasContent = false;
        blankLine(state);
        return forceBlankLine ? this.token(stream, state) : null;
      } else {
        state.prevLineHasContent = state.thisLineHasContent;
        state.thisLineHasContent = true;
      }

      // Reset state.taskList
      state.taskList = false;

      // Reset state.code
      state.code = false;

      // Reset state.trailingSpace
      state.trailingSpace = 0;
      state.trailingSpaceNewLine = false;

      state.f = state.block;
      var indentation = stream.match(/^\s*/, true)[0].replace(/\t/g, '    ').length;
      var difference = Math.floor((indentation - state.indentation) / 4) * 4;
      if (difference > 4) difference = 4;
      var adjustedIndentation = state.indentation + difference;
      state.indentationDiff = adjustedIndentation - state.indentation;
      state.indentation = adjustedIndentation;
      if (indentation > 0) return null;
    }
    var result = state.f(stream, state);
    if (stream.start == stream.pos) return this.token(stream, state);
    else return result;
  },

  innerMode: function(state) {
    if (state.block == htmlBlock) return {state: state.htmlState, mode: htmlMode};
    if (state.localState) return {state: state.localState, mode: state.localMode};
    return {state: state, mode: mode};
  },

  blankLine: blankLine,

  getType: getType,

  fold: "markdown"
};
return mode;

}, “xml”);

CodeMirror.defineMIME(“text/x-markdown”, “markdown”);

});