overlay.min.js (3228B)
1 // CodeMirror, copyright (c) by Marijn Haverbeke and others 2 // Distributed under an MIT license: http://codemirror.net/LICENSE 3 4 // Utility function that allows modes to be combined. The mode given 5 // as the base argument takes care of most of the normal mode 6 // functionality, but a second (typically simple) mode is used, which 7 // can override the style of text. Both modes get to parse all of the 8 // text, but when both assign a non-null style to a piece of code, the 9 // overlay wins, unless the combine argument was true and not overridden, 10 // or state.overlay.combineTokens was true, in which case the styles are 11 // combined. 12 13 (function(mod) { 14 if (typeof exports == "object" && typeof module == "object") // CommonJS 15 mod(require("../../lib/codemirror")); 16 else if (typeof define == "function" && define.amd) // AMD 17 define(["../../lib/codemirror"], mod); 18 else // Plain browser env 19 mod(CodeMirror); 20 })(function(CodeMirror) { 21 "use strict"; 22 23 CodeMirror.overlayMode = function(base, overlay, combine) { 24 return { 25 startState: function() { 26 return { 27 base: CodeMirror.startState(base), 28 overlay: CodeMirror.startState(overlay), 29 basePos: 0, baseCur: null, 30 overlayPos: 0, overlayCur: null, 31 streamSeen: null 32 }; 33 }, 34 copyState: function(state) { 35 return { 36 base: CodeMirror.copyState(base, state.base), 37 overlay: CodeMirror.copyState(overlay, state.overlay), 38 basePos: state.basePos, baseCur: null, 39 overlayPos: state.overlayPos, overlayCur: null 40 }; 41 }, 42 43 token: function(stream, state) { 44 if (stream != state.streamSeen || 45 Math.min(state.basePos, state.overlayPos) < stream.start) { 46 state.streamSeen = stream; 47 state.basePos = state.overlayPos = stream.start; 48 } 49 50 if (stream.start == state.basePos) { 51 state.baseCur = base.token(stream, state.base); 52 state.basePos = stream.pos; 53 } 54 if (stream.start == state.overlayPos) { 55 stream.pos = stream.start; 56 state.overlayCur = overlay.token(stream, state.overlay); 57 state.overlayPos = stream.pos; 58 } 59 stream.pos = Math.min(state.basePos, state.overlayPos); 60 61 // state.overlay.combineTokens always takes precedence over combine, 62 // unless set to null 63 if (state.overlayCur == null) return state.baseCur; 64 else if (state.baseCur != null && 65 state.overlay.combineTokens || 66 combine && state.overlay.combineTokens == null) 67 return state.baseCur + " " + state.overlayCur; 68 else return state.overlayCur; 69 }, 70 71 indent: base.indent && function(state, textAfter) { 72 return base.indent(state.base, textAfter); 73 }, 74 electricChars: base.electricChars, 75 76 innerMode: function(state) { return {state: state.base, mode: base}; }, 77 78 blankLine: function(state) { 79 var baseToken, overlayToken; 80 if (base.blankLine) baseToken = base.blankLine(state.base); 81 if (overlay.blankLine) overlayToken = overlay.blankLine(state.overlay); 82 83 return overlayToken == null ? 84 baseToken : 85 (combine && baseToken != null ? baseToken + " " + overlayToken : overlayToken); 86 } 87 }; 88 }; 89 90 });