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codemirror_overlay.js
85 lines
| 3.0 KiB
| application/javascript
|
JavascriptLexer
r1 | // CodeMirror, copyright (c) by Marijn Haverbeke and others | |||
// Distributed under an MIT license: http://codemirror.net/LICENSE | ||||
// Utility function that allows modes to be combined. The mode given | ||||
// as the base argument takes care of most of the normal mode | ||||
// functionality, but a second (typically simple) mode is used, which | ||||
// can override the style of text. Both modes get to parse all of the | ||||
// text, but when both assign a non-null style to a piece of code, the | ||||
// overlay wins, unless the combine argument was true and not overridden, | ||||
// or state.overlay.combineTokens was true, in which case the styles are | ||||
// combined. | ||||
(function(mod) { | ||||
if (typeof exports == "object" && typeof module == "object") // CommonJS | ||||
mod(require("../../lib/codemirror")); | ||||
else if (typeof define == "function" && define.amd) // AMD | ||||
define(["../../lib/codemirror"], mod); | ||||
else // Plain browser env | ||||
mod(CodeMirror); | ||||
})(function(CodeMirror) { | ||||
"use strict"; | ||||
CodeMirror.overlayMode = function(base, overlay, combine) { | ||||
return { | ||||
startState: function() { | ||||
return { | ||||
base: CodeMirror.startState(base), | ||||
overlay: CodeMirror.startState(overlay), | ||||
basePos: 0, baseCur: null, | ||||
overlayPos: 0, overlayCur: null, | ||||
streamSeen: null | ||||
}; | ||||
}, | ||||
copyState: function(state) { | ||||
return { | ||||
base: CodeMirror.copyState(base, state.base), | ||||
overlay: CodeMirror.copyState(overlay, state.overlay), | ||||
basePos: state.basePos, baseCur: null, | ||||
overlayPos: state.overlayPos, overlayCur: null | ||||
}; | ||||
}, | ||||
token: function(stream, state) { | ||||
if (stream != state.streamSeen || | ||||
Math.min(state.basePos, state.overlayPos) < stream.start) { | ||||
state.streamSeen = stream; | ||||
state.basePos = state.overlayPos = stream.start; | ||||
} | ||||
if (stream.start == state.basePos) { | ||||
state.baseCur = base.token(stream, state.base); | ||||
state.basePos = stream.pos; | ||||
} | ||||
if (stream.start == state.overlayPos) { | ||||
stream.pos = stream.start; | ||||
state.overlayCur = overlay.token(stream, state.overlay); | ||||
state.overlayPos = stream.pos; | ||||
} | ||||
stream.pos = Math.min(state.basePos, state.overlayPos); | ||||
// state.overlay.combineTokens always takes precedence over combine, | ||||
// unless set to null | ||||
if (state.overlayCur == null) return state.baseCur; | ||||
else if (state.baseCur != null && | ||||
state.overlay.combineTokens || | ||||
combine && state.overlay.combineTokens == null) | ||||
return state.baseCur + " " + state.overlayCur; | ||||
else return state.overlayCur; | ||||
}, | ||||
indent: base.indent && function(state, textAfter) { | ||||
return base.indent(state.base, textAfter); | ||||
}, | ||||
electricChars: base.electricChars, | ||||
innerMode: function(state) { return {state: state.base, mode: base}; }, | ||||
blankLine: function(state) { | ||||
if (base.blankLine) base.blankLine(state.base); | ||||
if (overlay.blankLine) overlay.blankLine(state.overlay); | ||||
} | ||||
}; | ||||
}; | ||||
}); | ||||