overlay.js
91 lines
| 1 | // CodeMirror, copyright (c) by Marijn Haverbeke and others |
| 2 | // Distributed under an MIT license: https://codemirror.net/5/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, line) { |
| 72 | return base.indent(state.base, textAfter, line); |
| 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 | }); |
| 91 |