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