| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990 | // CodeMirror, copyright (c) by Marijn Haverbeke and others// Distributed under an MIT license: https://codemirror.net/LICENSE// Utility function that allows modes to be combined. The mode given// as the base argument takes care of most of the normal mode// functionality, but a second (typically simple) mode is used, which// can override the style of text. Both modes get to parse all of the// text, but when both assign a non-null style to a piece of code, the// overlay wins, unless the combine argument was true and not overridden,// or state.overlay.combineTokens was true, in which case the styles are// combined.(function(mod) {  if (typeof exports == "object" && typeof module == "object") // CommonJS    mod(require("../../lib/codemirror"));  else if (typeof define == "function" && define.amd) // AMD    define(["../../lib/codemirror"], mod);  else // Plain browser env    mod(CodeMirror);})(function(CodeMirror) {"use strict";CodeMirror.overlayMode = function(base, overlay, combine) {  return {    startState: function() {      return {        base: CodeMirror.startState(base),        overlay: CodeMirror.startState(overlay),        basePos: 0, baseCur: null,        overlayPos: 0, overlayCur: null,        streamSeen: null      };    },    copyState: function(state) {      return {        base: CodeMirror.copyState(base, state.base),        overlay: CodeMirror.copyState(overlay, state.overlay),        basePos: state.basePos, baseCur: null,        overlayPos: state.overlayPos, overlayCur: null      };    },    token: function(stream, state) {      if (stream != state.streamSeen ||          Math.min(state.basePos, state.overlayPos) < stream.start) {        state.streamSeen = stream;        state.basePos = state.overlayPos = stream.start;      }      if (stream.start == state.basePos) {        state.baseCur = base.token(stream, state.base);        state.basePos = stream.pos;      }      if (stream.start == state.overlayPos) {        stream.pos = stream.start;        state.overlayCur = overlay.token(stream, state.overlay);        state.overlayPos = stream.pos;      }      stream.pos = Math.min(state.basePos, state.overlayPos);      // state.overlay.combineTokens always takes precedence over combine,      // unless set to null      if (state.overlayCur == null) return state.baseCur;      else if (state.baseCur != null &&               state.overlay.combineTokens ||               combine && state.overlay.combineTokens == null)        return state.baseCur + " " + state.overlayCur;      else return state.overlayCur;    },    indent: base.indent && function(state, textAfter, line) {      return base.indent(state.base, textAfter, line);    },    electricChars: base.electricChars,    innerMode: function(state) { return {state: state.base, mode: base}; },    blankLine: function(state) {      var baseToken, overlayToken;      if (base.blankLine) baseToken = base.blankLine(state.base);      if (overlay.blankLine) overlayToken = overlay.blankLine(state.overlay);      return overlayToken == null ?        baseToken :        (combine && baseToken != null ? baseToken + " " + overlayToken : overlayToken);    }  };};});
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