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 // overlayParser is the old, deprecated name
  10 CodeMirror.overlayMode = CodeMirror.overlayParser = function(base, overlay, combine) {
  11   return {
  12     startState: function() {
  13       return {
  14         base: CodeMirror.startState(base),
  15         overlay: CodeMirror.startState(overlay),
  16         basePos: 0, baseCur: null,
  17         overlayPos: 0, overlayCur: null
  18       };
  19     },
  20     copyState: function(state) {
  21       return {
  22         base: CodeMirror.copyState(base, state.base),
  23         overlay: CodeMirror.copyState(overlay, state.overlay),
  24         basePos: state.basePos, baseCur: null,
  25         overlayPos: state.overlayPos, overlayCur: null
  26       };
  27     },
  28
  29     token: function(stream, state) {
  30       if (stream.start == state.basePos) {
  31         state.baseCur = base.token(stream, state.base);
  32         state.basePos = stream.pos;
  33       }
  34       if (stream.start == state.overlayPos) {
  35         stream.pos = stream.start;
  36         state.overlayCur = overlay.token(stream, state.overlay);
  37         state.overlayPos = stream.pos;
  38       }
  39       stream.pos = Math.min(state.basePos, state.overlayPos);
  40       if (stream.eol()) state.basePos = state.overlayPos = 0;
  41
  42       if (state.overlayCur == null) return state.baseCur;
  43       if (state.baseCur != null && combine) return state.baseCur + " " + state.overlayCur;
  44       else return state.overlayCur;
  45     },
  46
  47     indent: base.indent && function(state, textAfter) {
  48       return base.indent(state.base, textAfter);
  49     },
  50     electricChars: base.electricChars,
  51
  52     innerMode: function(state) { return {state: state.base, mode: base}; },
  53
  54     blankLine: function(state) {
  55       if (base.blankLine) base.blankLine(state.base);
  56       if (overlay.blankLine) overlay.blankLine(state.overlay);
  57     }
  58   };
  59 };