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13 | (function(mod) {
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14 | if (typeof exports == "object" && typeof module == "object")
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15 | mod(require("../../lib/codemirror"));
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16 | else if (typeof define == "function" && define.amd)
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17 | define(["../../lib/codemirror"], mod);
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18 | else
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19 | mod(CodeMirror);
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20 | })(function(CodeMirror) {
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21 | "use strict";
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22 |
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23 | CodeMirror.overlayMode = function(base, overlay, combine) {
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24 | return {
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25 | startState: function() {
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26 | return {
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27 | base: CodeMirror.startState(base),
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28 | overlay: CodeMirror.startState(overlay),
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29 | basePos: 0, baseCur: null,
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30 | overlayPos: 0, overlayCur: null,
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31 | streamSeen: null
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32 | };
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33 | },
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34 | copyState: function(state) {
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35 | return {
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36 | base: CodeMirror.copyState(base, state.base),
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37 | overlay: CodeMirror.copyState(overlay, state.overlay),
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38 | basePos: state.basePos, baseCur: null,
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39 | overlayPos: state.overlayPos, overlayCur: null
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40 | };
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41 | },
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42 |
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43 | token: function(stream, state) {
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44 | if (stream != state.streamSeen ||
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45 | Math.min(state.basePos, state.overlayPos) < stream.start) {
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46 | state.streamSeen = stream;
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47 | state.basePos = state.overlayPos = stream.start;
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48 | }
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49 |
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50 | if (stream.start == state.basePos) {
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51 | state.baseCur = base.token(stream, state.base);
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52 | state.basePos = stream.pos;
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53 | }
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54 | if (stream.start == state.overlayPos) {
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55 | stream.pos = stream.start;
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56 | state.overlayCur = overlay.token(stream, state.overlay);
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57 | state.overlayPos = stream.pos;
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58 | }
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59 | stream.pos = Math.min(state.basePos, state.overlayPos);
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60 |
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61 |
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62 |
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63 | if (state.overlayCur == null) return state.baseCur;
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64 | else if (state.baseCur != null &&
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65 | state.overlay.combineTokens ||
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66 | combine && state.overlay.combineTokens == null)
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67 | return state.baseCur + " " + state.overlayCur;
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68 | else return state.overlayCur;
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69 | },
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70 |
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71 | indent: base.indent && function(state, textAfter, line) {
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72 | return base.indent(state.base, textAfter, line);
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73 | },
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74 | electricChars: base.electricChars,
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75 |
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76 | innerMode: function(state) { return {state: state.base, mode: base}; },
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77 |
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78 | blankLine: function(state) {
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79 | var baseToken, overlayToken;
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80 | if (base.blankLine) baseToken = base.blankLine(state.base);
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81 | if (overlay.blankLine) overlayToken = overlay.blankLine(state.overlay);
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82 |
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83 | return overlayToken == null ?
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84 | baseToken :
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85 | (combine && baseToken != null ? baseToken + " " + overlayToken : overlayToken);
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86 | }
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87 | };
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88 | };
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89 |
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90 | });
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