wcfsetup/install/files/js/3rdParty/codemirror/addon/mode/overlay.js

   1 // Utility function that allows modes to be combined. The mode given
   2 // as the base argument takes care of most of the normal mode
   3 // functionality, but a second (typically simple) mode is used, which
   4 // can override the style of text. Both modes get to parse all of the
   5 // text, but when both assign a non-null style to a piece of code, the
   6 // overlay wins, unless the combine argument was true, in which case
   7 // the styles are combined.
   8
   9 (function(mod) {
  10   if (typeof exports == "object" && typeof module == "object") // CommonJS
  11     mod(require("../../lib/codemirror"));
  12   else if (typeof define == "function" && define.amd) // AMD
  13     define(["../../lib/codemirror"], mod);
  14   else // Plain browser env
  15     mod(CodeMirror);
  16 })(function(CodeMirror) {
  17 "use strict";
  18
  19 CodeMirror.overlayMode = function(base, overlay, combine) {
  20   return {
  21     startState: function() {
  22       return {
  23         base: CodeMirror.startState(base),
  24         overlay: CodeMirror.startState(overlay),
  25         basePos: 0, baseCur: null,
  26         overlayPos: 0, overlayCur: null
  27       };
  28     },
  29     copyState: function(state) {
  30       return {
  31         base: CodeMirror.copyState(base, state.base),
  32         overlay: CodeMirror.copyState(overlay, state.overlay),
  33         basePos: state.basePos, baseCur: null,
  34         overlayPos: state.overlayPos, overlayCur: null
  35       };
  36     },
  37
  38     token: function(stream, state) {
  39       if (stream.start == state.basePos) {
  40         state.baseCur = base.token(stream, state.base);
  41         state.basePos = stream.pos;
  42       }
  43       if (stream.start == state.overlayPos) {
  44         stream.pos = stream.start;
  45         state.overlayCur = overlay.token(stream, state.overlay);
  46         state.overlayPos = stream.pos;
  47       }
  48       stream.pos = Math.min(state.basePos, state.overlayPos);
  49       if (stream.eol()) state.basePos = state.overlayPos = 0;
  50
  51       if (state.overlayCur == null) return state.baseCur;
  52       if (state.baseCur != null && combine) return state.baseCur + " " + state.overlayCur;
  53       else return state.overlayCur;
  54     },
  55
  56     indent: base.indent && function(state, textAfter) {
  57       return base.indent(state.base, textAfter);
  58     },
  59     electricChars: base.electricChars,
  60
  61     innerMode: function(state) { return {state: state.base, mode: base}; },
  62
  63     blankLine: function(state) {
  64       if (base.blankLine) base.blankLine(state.base);
  65       if (overlay.blankLine) overlay.blankLine(state.overlay);
  66     }
  67   };
  68 };
  69
  70 });