wcfsetup/install/files/js/3rdParty/codemirror/addon/search/match-highlighter.js

   1 // Highlighting text that matches the selection
   2 //
   3 // Defines an option highlightSelectionMatches, which, when enabled,
   4 // will style strings that match the selection throughout the
   5 // document.
   6 //
   7 // The option can be set to true to simply enable it, or to a
   8 // {minChars, style, showToken} object to explicitly configure it.
   9 // minChars is the minimum amount of characters that should be
  10 // selected for the behavior to occur, and style is the token style to
  11 // apply to the matches. This will be prefixed by "cm-" to create an
  12 // actual CSS class name. showToken, when enabled, will cause the
  13 // current token to be highlighted when nothing is selected.
  14
  15 (function(mod) {
  16   if (typeof exports == "object" && typeof module == "object") // CommonJS
  17     mod(require("../../lib/codemirror"));
  18   else if (typeof define == "function" && define.amd) // AMD
  19     define(["../../lib/codemirror"], mod);
  20   else // Plain browser env
  21     mod(CodeMirror);
  22 })(function(CodeMirror) {
  23   "use strict";
  24
  25   var DEFAULT_MIN_CHARS = 2;
  26   var DEFAULT_TOKEN_STYLE = "matchhighlight";
  27   var DEFAULT_DELAY = 100;
  28
  29   function State(options) {
  30     if (typeof options == "object") {
  31       this.minChars = options.minChars;
  32       this.style = options.style;
  33       this.showToken = options.showToken;
  34       this.delay = options.delay;
  35     }
  36     if (this.style == null) this.style = DEFAULT_TOKEN_STYLE;
  37     if (this.minChars == null) this.minChars = DEFAULT_MIN_CHARS;
  38     if (this.delay == null) this.delay = DEFAULT_DELAY;
  39     this.overlay = this.timeout = null;
  40   }
  41
  42   CodeMirror.defineOption("highlightSelectionMatches", false, function(cm, val, old) {
  43     if (old && old != CodeMirror.Init) {
  44       var over = cm.state.matchHighlighter.overlay;
  45       if (over) cm.removeOverlay(over);
  46       clearTimeout(cm.state.matchHighlighter.timeout);
  47       cm.state.matchHighlighter = null;
  48       cm.off("cursorActivity", cursorActivity);
  49     }
  50     if (val) {
  51       cm.state.matchHighlighter = new State(val);
  52       highlightMatches(cm);
  53       cm.on("cursorActivity", cursorActivity);
  54     }
  55   });
  56
  57   function cursorActivity(cm) {
  58     var state = cm.state.matchHighlighter;
  59     clearTimeout(state.timeout);
  60     state.timeout = setTimeout(function() {highlightMatches(cm);}, state.delay);
  61   }
  62
  63   function highlightMatches(cm) {
  64     cm.operation(function() {
  65       var state = cm.state.matchHighlighter;
  66       if (state.overlay) {
  67         cm.removeOverlay(state.overlay);
  68         state.overlay = null;
  69       }
  70       if (!cm.somethingSelected() && state.showToken) {
  71         var re = state.showToken === true ? /[\w$]/ : state.showToken;
  72         var cur = cm.getCursor(), line = cm.getLine(cur.line), start = cur.ch, end = start;
  73         while (start && re.test(line.charAt(start - 1))) --start;
  74         while (end < line.length && re.test(line.charAt(end))) ++end;
  75         if (start < end)
  76           cm.addOverlay(state.overlay = makeOverlay(line.slice(start, end), re, state.style));
  77         return;
  78       }
  79       if (cm.getCursor("head").line != cm.getCursor("anchor").line) return;
  80       var selection = cm.getSelections()[0].replace(/^\s+|\s+$/g, "");
  81       if (selection.length >= state.minChars)
  82         cm.addOverlay(state.overlay = makeOverlay(selection, false, state.style));
  83     });
  84   }
  85
  86   function boundariesAround(stream, re) {
  87     return (!stream.start || !re.test(stream.string.charAt(stream.start - 1))) &&
  88       (stream.pos == stream.string.length || !re.test(stream.string.charAt(stream.pos)));
  89   }
  90
  91   function makeOverlay(query, hasBoundary, style) {
  92     return {token: function(stream) {
  93       if (stream.match(query) &&
  94           (!hasBoundary || boundariesAround(stream, hasBoundary)))
  95         return style;
  96       stream.next();
  97       stream.skipTo(query.charAt(0)) || stream.skipToEnd();
  98     }};
  99   }
 100 });