0
|
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 });
|