espeasy.js

//espeasy.js written by chromoxdor based on shell.js 
// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

var commonAtoms = ["And", "Or"];
var commonKeywords = ["If", "Else", "Elseif", "Endif"];
var commonCommands = ["AccessInfo", "Background", "Build", "ClearAccessBlock", "ClearRTCam", "Config", "ControllerDisable",
  "ControllerEnable", "DateTime", "Debug", "Dec", "DeepSleep", "DisablePriorityTask", "DNS", "DST", "EraseSDKWiFi", "ExecuteRules", "FactoryReset", "Gateway", "I2Cscanner", "Inc",
  "IP", "Let", "Load", "LogEntry", "LogPortStatus", "LoopTimerSet", "LoopTimerSet_ms", "MemInfo", "MemInfoDetail", "Name", "Password", "PostToHTTP", "Publish", "PublishR",
  "Reboot", "Save", "SendTo", "SendToHTTP", "SendToUDP", "Settings", "Subnet", "Subscribe", "TaskClear", "TaskClearAll",
  "TaskDisable", "TaskEnable", "TaskRun", "TaskValueSet", "TaskValueSetAndRun", "TimerPause", "TimerResume", "TimerSet", "TimerSet_ms", "TimeZone",
  "UdpPort", "UdpTest", "Unit", "UseNTP", "WdConfig", "WdRead", "WiFi", "WiFiAllowAP", "WiFiAPMode", "WiFiConnect", "WiFiDisconnect", "WiFiKey",
  "WiFiKey2", "WiFiMode", "WiFiScan", "WiFiSSID", "WiFiSSID2", "WiFiSTAMode",
  "Event", "AsyncEvent",
  "GPIO", "GPIOToggle", "LongPulse", "LongPulse_mS", "Monitor", "Pulse", "PWM", "Servo", "Status", "Tone", "RTTTL", "UnMonitor",];
var commonEvents = ["Clock#Time", "Login#Failed", "MQTT#Connected", "MQTT#Disconnected", "MQTTimport#Connected", "MQTTimport#Disconnected", "Rules#Timer", "System#Boot",
  "System#BootMode", "System#Sleep", "System#Wake", "TaskExit#", "TaskInit#", "ThingspeakReply", "Time#Initialized", "Time#Set", "WiFi#APmodeDisabled", "WiFi#APmodeEnabled",
  "WiFi#ChangedAccesspoint", "WiFi#ChangedWiFichannel", "WiFi#Connected", "WiFi#Disconnected"];
var commonPlugins = [
  //P003
  "ResetPulseCounter", "SetPulseCounterTotal", "LogPulseStatistic",
  //P007
  "analogout",
  //P009
  "MCPGPIO", "MCPGPIOToggle", "MCPLongPulse", "MCPLongPulse_ms", "MCPPulse", "Status,MCP", "Monitor,MCP", "MonitorRange,MCP",
  "UnMonitorRange,MCP", "UnMonitor,MCP", "MCPGPIORange", "MCPGPIOPattern", "MCPMode", "MCPModeRange",
  //P011
  "ExtGpio", "ExtPwm", "ExtPulse", "ExtLongPulse", "Status,EXT,",
  //P012
  "LCDCmd", "LCD",
  //P019
  "PCFGPIO", "PCFGPIOToggle", "PCFLongPulse", "PCFLongPulse_ms", "PCFPulse", "Status,PCF", "Monitor,PCF",
  "MonitorRange,PCF", "UnMonitorRange,PCF", "UnMonitor,PCF", "PCFGPIORange", "PCFGPIOpattern", "PCFMode", "PCFmodeRange",
  //P022
  "pcapwm", "pcafrq", "mode2",
  //P023
  "OLED", "OLEDCMD", "OLEDCMD,on", "OLEDCMD,off", "OLEDCMD,clear",
  //P035
  "IRSEND", "IRSENDAC",
  //P036
  "OledFramedCmd", "OledFramedCmd,Display", "OledFramedCmd,low", "OledFramedCmd,med", "OledFramedCmd,high", /*"OledFramedCmd,user",*/ "OledFramedCmd,Frame", "OledFramedCmd,linecount", "OledFramedCmd,leftalign", "OledFramedCmd,align", "OledFramedCmd,userDef1", "OledFramedCmd,userDef2",
  //P038
  "NeoPixel", "NeoPixelAll", "NeoPixelLine", "NeoPixelHSV", "NeoPixelAllHSV", "NeoPixelLineHSV", "NeoPixelBright",
  //P048
  "MotorShieldCmd,DCMotor", "MotorShieldCmd,Stepper",
  //P052
  "Sensair_SetRelay",
  //P053
  "PMSX003", "PMSX003,Wake", "PMSX003,Sleep", "PMSX003,Reset",
  //P059
  "encwrite",
  //P065
  "Play", "Vol", "Eq", "Mode", "Repeat",
  //P067
  "tareChanA", "tareChanB",
  //P073
  "7dn", "7dst", "7dsd", "7dtext", "7ddt", "7dt", "7dtfont", "7dtbin", "7don", "7doff", "7output",
  //P076
  "HLWCalibrate", "HLWReset",
  //P077
  "csecalibrate", "cseclearpulses", "csereset",
  //P079
  "WemosMotorShieldCMD", "LolinMotorShieldCMD",
  //P082
  "GPS", "GPS,Sleep", "GPS,Wake", "GPS#GotFix", "GPS#LostFix", "GPS#Travelled",
  //P086
  "homieValueSet",
  //P088
  "HeatPumpir",
  //P093
  "MitsubishiHP", "MitsubishiHP,temperature", "MitsubishiHP,power", "MitsubishiHP,mode", "MitsubishiHP,fan", "MitsubishiHP,vane", "MitsubishiHP,widevane",
  //P094
  "Culreader_Write",
  //P099 & P123
  "Touch", "Touch,Rot", "Touch,Flip", "Touch,Enable", "Touch,Disable", "Touch,On", "Touch,Off", "Touch,Toggle", "Touch,Setgrp", "Touch,Incgrp", "Touch,Decgrp", "Touch,Incpage", "Touch,Decpage", "Touch,Updatebutton",
  //P101
  "WakeOnLan",
  //P104
  "DotMatrix", "DotMatrix,clear", "DotMatrix,update", "DotMatrix,size", "DotMatrix,txt", "DotMatrix,settxt", "DotMatrix,content", "DotMatrix,alignment", "DotMatrix,anim.in", "DotMatrix,anim.out", "DotMatrix,speed", "DotMatrix,pause", "DotMatrix,font", "DotMatrix,layout", "DotMatrix,inverted", "DotMatrix,specialeffect", "DotMatrix,offset", "DotMatrix,brightness", "DotMatrix,repeat", "DotMatrix,setbar", "DotMatrix,bar",
  //P109
  "Thermo", "Thermo,Up", "Thermo,Down", "Thermo,Mode", "Thermo,ModeBtn", "Thermo,Setpoint",
  //P115
  "Max1704xclearalert",
  //P116
  //P117
  "scdgetabc", "scdgetalt", "scdgettmp", "scdsetcalibration", "scdsetfrc", "scdgetinterval",
  //P124
  "multirelay", "multirelay,on", "multirelay,off", "multirelay,set", "multirelay,get", "multirelay,loop",
  //P126
  "ShiftOut", "ShiftOut,Set", "ShiftOut,SetNoUpdate", "ShiftOut,Update", "ShiftOut,SetAll", "ShiftOut,SetAllNoUpdate", "ShiftOut,SetAllLow", "ShiftOut,SetAllHigh", "ShiftOut,SetChipCount", "ShiftOut,SetHexBin",
  //P127
  "cdmrst",
  //P128
  "nfx", "nfx,off", "nfx,on", "nfx,dim", "nfx,line,", "nfx,hsvline,", "nfx,one,", "nfx,hsvone,", "nfx,all,", "nfx,rgb,", "nfx,fade,", "nfx,hsv,", "nfx,colorfade,", "nfx,rainbow", "nfx,kitt,", "nfx,comet,", "nfx,theatre,", "nfx,scan,", "nfx,dualscan,", "nfx,twinkle,", "nfx,twinklefade,", "nfx,sparkle,", "nfx,wipe,", "nfx,dualwipe", "nfx,fire", "nfx,fireflicker", "nfx,faketv", "nfx,simpleclock", "nfx,stop", "nfx,statusrequest", "nfx,fadetime,", "nfx,fadedelay,", "nfx,speed,", "nfx,count,", "nfx,bgcolor",
  //P129
  "ShiftIn", "ShiftIn,PinEvent", "ShiftIn,ChipEvent", "ShiftIn,SetChipCount", "ShiftIn,SampleFrequency", "ShiftIn,EventPerPin",
  //P135
  "scd4x", "scd4x,storesettings", "scd4x,facoryreset", "scd4x,selftest", "scd4x,setfrc,",
  //P137
  "axp", "axp,ldo2", "axp,ldo3", "axp,ldoio", "axp,gpio0", "axp,gpio1", "axp,gpio2", "axp,gpio3", "axp,gpio4", "axp,dcdc2", "axp,dcdc3", "axp,ldo2map", "axp,ldo3map", "axp,ldoiomap", "axp,dcdc2map", "axp,dcdc3map", "axp,ldo2perc", "axp,ldo3perc", "axp,ldoioperc", "axp,dcdc2perc", "axp,dcdc3perc",
  //P143
  "I2CEncoder", "I2CEncoder,bright", "I2CEncoder,led1", "I2CEncoder,led2", "I2CEncoder,gain", "I2CEncoder,set",
  //P146
  "cachereader", "cachereader,readpos", "cachereader,sendtaskinfo", "cachereader,flush",
  //P148
  "tm1621", "tm1621,write,", "tm1621,writerow,", "tm1621,voltamp,", "tm1621,energy,", "tm1621,celcius,", "tm1621,fahrenheit,", "tm1621,humidity,", "tm1621,raw,",
  //P152
  "dac", "dac,1", "dac,2",
  //P153
  "sht4x", "sht4x,startup",
  //P159
  "ld2410", "ld2410,factoryreset", "ld2410,logall",
  //P162
  "digipot", "digipot,reset", "digipot,shutdown", "digipot,",
  //P165
  "7dextra", "7dbefore", "7dgroup", "7digit", "7color", "7digitcolor", "7groupcolor",
  //P166
  "gp8403", "gp8403,volt,", "gp8403,mvolt,", "gp8403,range,", "gp8403,preset,", "gp8403,init,",
  //P167
  "sen5x", "sen5x,startclean", "sen5x,techlog,",
];
var pluginDispKind = [
  //P095
  "tft", "ili9341", "ili9342", "ili9481", "ili9486", "ili9488",
  //P096
  "epd", "eink", "epaper", "il3897", "uc8151d", "ssd1680", "ws2in7", "ws1in54",
  //P116
  /*"tft",*/ "st77xx", "st7735", "st7789", "st7796",
  //P131
  "neomatrix", "neo",
  //P141
  /*"lcd",*/ "pcd8544",
];
var pluginDispCmd = [
  "cmd,on", "cmd,off", "cmd,clear", "cmd,backlight", "cmd,bright", "cmd,deepsleep", "cmd,seq_start", "cmd,seq_end", "cmd,inv", "cmd,rot",
  ",clear", ",rot", ",tpm", ",txt", ",txp", ",txz", ",txc", ",txs", ",txtfull", ",asciitable", ",font",
  ",l", ",lh", ",lv", ",lm", ",lmr", ",r", ",rf", ",c", ",cf", ",rf", ",t", ",tf", ",rr", ",rrf", ",px", ",pxh", ",pxv", ",bmp", ",btn",
  ",win", ",defwin", ",delwin",
];
var commonTag = ["On", "Do", "Endon"];
var commonNumber = ["toBin", "toHex", "Constrain", "XOR", "AND:", "OR:", "Ord", "bitRead", "bitSet", "bitClear", "bitWrite", "urlencode"];
var commonMath = ["Log", "Ln", "Abs", "Exp", "Sqrt", "Sq", "Round", "Sin", "Cos", "Tan", "aSin", "aCos", "aTan", "Sin_d", "Cos_d", "Tan_d", "aSin_d", "aCos_d", "aTan_d"];
var commonWarning = ["delay", "Delay", "ResetFlashWriteCounter"];
var taskSpecifics = [
  //Task settings
  "settings.Enabled", "settings.Interval", "settings.ValueCount",
  "settings.Controller1.Enabled", "settings.Controller2.Enabled", "settings.Controller3.Enabled",
  "settings.Controller1.Idx", "settings.Controller2.Idx", "settings.Controller3.Idx"
];
//things that do not fit in any other catergory (for now)
var AnythingElse = [
  //System Variables
  "%eventvalue%", "%eventpar%", "%eventname%", "%sysname%", "%bootcause%", "%systime%", "%systm_hm%",
  "%systm_hm_0%", "%systm_hm_sp%", "%systime_am%", "%systime_am_0%", "%systime_am_sp%", "%systm_hm_am%", "%systm_hm_am_0%", "%systm_hm_am_sp%",
  "%lcltime%", "%sunrise%", "%s_sunrise%", "%m_sunrise%", "%sunset%", "%s_sunset%", "%m_sunset%", "%lcltime_am%",
  "%syshour%", "%syshour_0%", "%sysmin%", "%sysmin_0%", "%syssec%", "%syssec_0%", "%sysday%", "%sysday_0%", "%sysmonth%",
  "%sysmonth_0%", "%sysyear%", "%sysyear_0%", "%sysyears%", "%sysweekday%", "%sysweekday_s%", "%unixtime%", "%uptime%", "%uptime_ms%",
  "%rssi%", "%ip%", "%unit%", "%unit_0%", "%ssid%", "%bssid%", "%wi_ch%", "%iswifi%", "%vcc%", "%mac%", "%mac_int%", "%isntp%", "%ismqtt%",
  "%dns%", "%dns1%", "%dns2%", "%flash_freq%", "%flash_size%", "%flash_chip_vendor%", "%flash_chip_model%", "%fs_free%", "%fs_size%",
  "%cpu_id%", "%cpu_freq%", "%cpu_model%", "%cpu_rev%", "%cpu_cores%", "%board_name%", "%inttemp%",
  //String Functions
  "substring", "indexOf", "indexOf_ci", "equals", "equals_ci", "strtol", "timeToMin", "timeToSec",
  //Ethernet
  "%ethwifimode%", "%ethconnected%", "%ethduplex%", "%ethspeed%", "%ethstate%", "%ethspeedstate%",
  //Standard Conversions
  "%c_w_dir%", "%c_c2f%", "%c_ms2Bft%", "%c_dew_th%", "%c_alt_pres_sea%", "%c_sea_pres_alt%", "%c_cm2imp%", "%c_mm2imp%",
  "%c_m2day%", "%c_m2dh%", "%c_m2dhm%", "%c_s2dhms%", "%c_2hex%", "%c_u2ip%", "%c_uname%", "%c_uage%", "%c_ubuild%", "%c_ubuildstr%",
  "%c_uload%", "%c_utype%", "%c_utypestr%",
  //Variables
  "var", "int"
];

//merging displayspecific commands of P095,P096,P116,P131 into commonPlugins
for (const element2 of pluginDispKind) {
  commonPlugins = commonPlugins.concat(element2);
}
for (const element2 of pluginDispKind) {
  for (const element3 of pluginDispCmd) {
    let mergedDisp = element2 + element3;
    commonPlugins = commonPlugins.concat(mergedDisp);
  }
}

var EXTRAWORDS = commonAtoms.concat(commonPlugins, commonKeywords, commonCommands, commonEvents, commonTag, commonNumber, commonMath, commonWarning, taskSpecifics, AnythingElse);

var rEdit;
function initCM() {
  var confirmR = true
  var android = /Android/.test(navigator.userAgent);
  if (android) {
    if (confirm("Do you want to enable colored rules? (There are some issues with the standard Android Keyboard causing it to fail!)")) {
      confirmR = true
    } else {
      confirmR = false
    }
  }
  if (confirmR) {
    CodeMirror.commands.autocomplete = function (cm) { cm.showHint({ hint: CodeMirror.hint.anyword }); }
    rEdit = CodeMirror.fromTextArea(document.getElementById('rules'), {
      tabSize: 2, indentWithTabs: false, lineNumbers: true, autoCloseBrackets: true,
      extraKeys: {
        'Ctrl-Space': 'autocomplete',
        Tab: (cm) => {
          if (cm.getMode().name === 'null') {
            cm.execCommand('insertTab');
          } else {
            if (cm.somethingSelected()) {
              cm.execCommand('indentMore');
            } else {
              cm.execCommand('insertSoftTab');
            }
          }
        },
        'Shift-Tab': (cm) => cm.execCommand('indentLess'),
      }
    });
    rEdit.on('change', function () { rEdit.save() });
    //hinting on input
    rEdit.on("inputRead", function (cm, event) {
      var letters = /[\w%,.]/; //characters for activation
      var cur = cm.getCursor();
      var token = cm.getTokenAt(cur);
      if (letters.test(event.text) && token.type != "comment") {
        cm.showHint({ completeSingle: false });
      };
    });
  }
}


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

  CodeMirror.defineMode('espeasy', function () {
    var words = {};
    function define(style, dict) {
      for (var i = 0; i < dict.length; i++) {
        words[dict[i]] = style;
      }
    };
    var lCcommonCommands = commonCommands.map(name => name.toLowerCase());
    commonCommands = commonCommands.concat(lCcommonCommands);

    var lCcommonString2 = commonEvents.map(name => name.toLowerCase());
    commonEvents = commonEvents.concat(lCcommonString2);

    var lCcommonPlugins = commonPlugins.map(name => name.toLowerCase());
    commonPlugins = commonPlugins.concat(lCcommonPlugins);

    var lCcommonAtoms = commonAtoms.map(name => name.toLowerCase());
    commonAtoms = commonAtoms.concat(lCcommonAtoms);

    var lCcommonKeywords = commonKeywords.map(name => name.toLowerCase());
    commonKeywords = commonKeywords.concat(lCcommonKeywords);

    var lCcommonTag = commonTag.map(name => name.toLowerCase());
    commonTag = commonTag.concat(lCcommonTag);

    var lCcommonNumber = commonNumber.map(name => name.toLowerCase());
    commonNumber = commonNumber.concat(lCcommonNumber);

    var lCcommonMath = commonMath.map(name => name.toLowerCase());
    commonMath = commonMath.concat(lCcommonMath);

    var lCAnythingElse = AnythingElse.map(name => name.toLowerCase());
    AnythingElse = AnythingElse.concat(lCAnythingElse);

    var lCtaskSpecifics = taskSpecifics.map(name => name.toLowerCase());
    taskSpecifics = taskSpecifics.concat(lCtaskSpecifics);

    define('atom', commonAtoms);
    define('keyword', commonKeywords);
    define('builtin', commonCommands);
    define('events', commonEvents);
    define('def', commonPlugins);
    define('tag', commonTag);
    define('number', commonNumber);
    define('bracket', commonMath);
    define('warning', commonWarning);
    define('hr', AnythingElse);
    define('comment', taskSpecifics);

    function tokenBase(stream, state) {
      if (stream.eatSpace()) return null;

      var sol = stream.sol();
      var ch = stream.next();

      if (/\d/.test(ch)) {
        if (ch == "0") {
          if (stream.next() === 'x') {
            stream.eatWhile(/\w/);
            return 'number';
          }
          else {
            stream.eatWhile(/\d|\./);
            return 'number';
          }
        }
        else {
          stream.eatWhile(/\d|\./);
          if (!stream.match("d") && !stream.match("output")) {
            if (stream.eol() || /\D/.test(stream.peek())) {
              return 'number';
            }
          }
        }
      }

      if (/\w/.test(ch)) {
        for (const element of EXTRAWORDS) {
          let WinDB = element.substring(1);
          if ((element.includes(":") || element.includes(",") || element.includes(".")) && stream.match(WinDB)) void (0)
        }
      }
      //P022 addition
      if (/\w/.test(ch)) {
        stream.eatWhile(/[\w]/);
        if (stream.match(".gpio") || stream.match(".pulse") || stream.match(".frq") || stream.match(".pwm")) {
          return 'def';
        }
      }

      if (ch === '\\') {
        stream.next();
        return null;
      }

      if (ch === '(' || ch === ')') {
        return "bracket";
      }

      if (ch === '{' || ch === '}' || ch === ':') {
        return "number";
      }

      if (ch == "/") {
        if (/\//.test(stream.peek())) {
          stream.skipToEnd();
          return "comment";
        }
        else {
          return 'operator';
        }
      }

      if (ch == "'") {
        stream.eatWhile(/[^']/);
        if (stream.match("'")) return 'attribute';
      }

      if (ch === '+' || ch === '=' || ch === '<' || ch === '>' || ch === '-' || ch === ',' || ch === '*' || ch === '!') {
        return 'operator';
      }

      if (ch == "%") {
        if (/\d/.test(stream.next())) { return 'number'; }
        else {
          stream.eatWhile(/[^\s\%]/);
          if (stream.match("%")) return 'hr';
        }
      }

      if (ch == "[") {
        stream.eatWhile(/[^\s\]]/);
        if (stream.eat("]")) return 'hr';
      }

      stream.eatWhile(/\w/);
      var cur = stream.current();

      if (/\w/.test(ch)) {
        if (stream.match("#")) {
          stream.eatWhile(/[\w.#]/);
          return 'events';
        }
      }

      if (ch === '#') {
        stream.eatWhile(/\w/);
        return 'number';
      }
      return words.hasOwnProperty(cur) ? words[cur] : null;
    }

    function tokenize(stream, state) {
      return (state.tokens[0] || tokenBase)(stream, state);
    };

    return {
      startState: function () { return { tokens: [] }; },
      token: function (stream, state) {
        return tokenize(stream, state);
      },
      //electricInput: /^\s*(\bendon\b)/i, //extra
      closeBrackets: "[]{}''\"\"``()",
      lineComment: '//',
      fold: "brace"
    };
  });
});

//------------------------closebrackets.js------------

(function (closeBrackets) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    closeBrackets(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    closeBrackets(CodeMirror);
})(function (CodeMirror) {
  var defaults = {
    pairs: "()[]{}''\"\"",
    closeBefore: ")]}'\":;>",
    triples: "",
    explode: "[]{}"
  };

  var Pos = CodeMirror.Pos;

  CodeMirror.defineOption("autoCloseBrackets", false, function (cm, val, old) {
    if (old && old != CodeMirror.Init) {
      cm.removeKeyMap(keyMap);
      cm.state.closeBrackets = null;
    }
    if (val) {
      ensureBound(getOption(val, "pairs"))
      cm.state.closeBrackets = val;
      cm.addKeyMap(keyMap);
    }
  });

  function getOption(conf, name) {
    if (name == "pairs" && typeof conf == "string") return conf;
    if (typeof conf == "object" && conf[name] != null) return conf[name];
    return defaults[name];
  }

  var keyMap = { Backspace: handleBackspace, Enter: handleEnter };
  function ensureBound(chars) {
    for (var i = 0; i < chars.length; i++) {
      var ch = chars.charAt(i), key = "'" + ch + "'"
      if (!keyMap[key]) keyMap[key] = handler(ch)
    }
  }
  ensureBound(defaults.pairs + "`")

  function handler(ch) {
    return function (cm) { return handleChar(cm, ch); };
  }

  function getConfig(cm) {
    var deflt = cm.state.closeBrackets;
    if (!deflt || deflt.override) return deflt;
    var mode = cm.getModeAt(cm.getCursor());
    return mode.closeBrackets || deflt;
  }

  function handleBackspace(cm) {
    var conf = getConfig(cm);
    if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;

    var pairs = getOption(conf, "pairs");
    var ranges = cm.listSelections();
    for (var i = 0; i < ranges.length; i++) {
      if (!ranges[i].empty()) return CodeMirror.Pass;
      var around = charsAround(cm, ranges[i].head);
      if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
    }
    for (var i = ranges.length - 1; i >= 0; i--) {
      var cur = ranges[i].head;
      cm.replaceRange("", Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1), "+delete");
    }
  }

  function handleEnter(cm) {
    var conf = getConfig(cm);
    var explode = conf && getOption(conf, "explode");
    if (!explode || cm.getOption("disableInput")) return CodeMirror.Pass;

    var ranges = cm.listSelections();
    for (var i = 0; i < ranges.length; i++) {
      if (!ranges[i].empty()) return CodeMirror.Pass;
      var around = charsAround(cm, ranges[i].head);
      if (!around || explode.indexOf(around) % 2 != 0) return CodeMirror.Pass;
    }
    cm.operation(function () {
      var linesep = cm.lineSeparator() || "\n";
      cm.replaceSelection(linesep + linesep, null);
      moveSel(cm, -1)
      ranges = cm.listSelections();
      for (var i = 0; i < ranges.length; i++) {
        var line = ranges[i].head.line;
        cm.indentLine(line, null, true);
        cm.indentLine(line + 1, null, true);
      }
    });
  }

  function moveSel(cm, dir) {
    var newRanges = [], ranges = cm.listSelections(), primary = 0
    for (var i = 0; i < ranges.length; i++) {
      var range = ranges[i]
      if (range.head == cm.getCursor()) primary = i
      var pos = range.head.ch || dir > 0 ? { line: range.head.line, ch: range.head.ch + dir } : { line: range.head.line - 1 }
      newRanges.push({ anchor: pos, head: pos })
    }
    cm.setSelections(newRanges, primary)
  }

  function contractSelection(sel) {
    var inverted = CodeMirror.cmpPos(sel.anchor, sel.head) > 0;
    return {
      anchor: new Pos(sel.anchor.line, sel.anchor.ch + (inverted ? -1 : 1)),
      head: new Pos(sel.head.line, sel.head.ch + (inverted ? 1 : -1))
    };
  }

  function handleChar(cm, ch) {
    var conf = getConfig(cm);
    if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;

    var pairs = getOption(conf, "pairs");
    var pos = pairs.indexOf(ch);
    if (pos == -1) return CodeMirror.Pass;

    var closeBefore = getOption(conf, "closeBefore");

    var triples = getOption(conf, "triples");

    var identical = pairs.charAt(pos + 1) == ch;
    var ranges = cm.listSelections();
    var opening = pos % 2 == 0;

    var type;
    for (var i = 0; i < ranges.length; i++) {
      var range = ranges[i], cur = range.head, curType;
      var next = cm.getRange(cur, Pos(cur.line, cur.ch + 1));
      if (opening && !range.empty()) {
        curType = "surround";
      } else if ((identical || !opening) && next == ch) {
        if (identical && stringStartsAfter(cm, cur))
          curType = "both";
        else if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
          curType = "skipThree";
        else
          curType = "skip";
      } else if (identical && cur.ch > 1 && triples.indexOf(ch) >= 0 &&
        cm.getRange(Pos(cur.line, cur.ch - 2), cur) == ch + ch) {
        if (cur.ch > 2 && /\bstring/.test(cm.getTokenTypeAt(Pos(cur.line, cur.ch - 2)))) return CodeMirror.Pass;
        curType = "addFour";
      } else if (identical) {
        var prev = cur.ch == 0 ? " " : cm.getRange(Pos(cur.line, cur.ch - 1), cur)
        if (!CodeMirror.isWordChar(next) && prev != ch && !CodeMirror.isWordChar(prev)) curType = "both";
        else return CodeMirror.Pass;
      } else if (opening && (next.length === 0 || /\s/.test(next) || closeBefore.indexOf(next) > -1)) {
        curType = "both";
      } else {
        return CodeMirror.Pass;
      }
      if (!type) type = curType;
      else if (type != curType) return CodeMirror.Pass;
    }

    var left = pos % 2 ? pairs.charAt(pos - 1) : ch;
    var right = pos % 2 ? ch : pairs.charAt(pos + 1);
    cm.operation(function () {
      if (type == "skip") {
        moveSel(cm, 1)
      } else if (type == "skipThree") {
        moveSel(cm, 3)
      } else if (type == "surround") {
        var sels = cm.getSelections();
        for (var i = 0; i < sels.length; i++)
          sels[i] = left + sels[i] + right;
        cm.replaceSelections(sels, "around");
        sels = cm.listSelections().slice();
        for (var i = 0; i < sels.length; i++)
          sels[i] = contractSelection(sels[i]);
        cm.setSelections(sels);
      } else if (type == "both") {
        cm.replaceSelection(left + right, null);
        cm.triggerElectric(left + right);
        moveSel(cm, -1)
      } else if (type == "addFour") {
        cm.replaceSelection(left + left + left + left, "before");
        moveSel(cm, 1)
      }
    });
  }

  function charsAround(cm, pos) {
    var str = cm.getRange(Pos(pos.line, pos.ch - 1),
      Pos(pos.line, pos.ch + 1));
    return str.length == 2 ? str : null;
  }

  function stringStartsAfter(cm, pos) {
    var token = cm.getTokenAt(Pos(pos.line, pos.ch + 1))
    return /\bstring/.test(token.type) && token.start == pos.ch &&
      (pos.ch == 0 || !/\bstring/.test(cm.getTokenTypeAt(pos)))
  }
});