[match-highlighter] Added wordsOnly option

addon/search/match-highlighter.js

@@ -8,12 +8,15 @@
 // document.
 //
 // The option can be set to true to simply enable it, or to a
-// {minChars, style, showToken} object to explicitly configure it.
-// minChars is the minimum amount of characters that should be
+// {minChars, style, wordsOnly, showToken, delay} object to explicitly
+// configure it. minChars is the minimum amount of characters that should be
 // selected for the behavior to occur, and style is the token style to
 // apply to the matches. This will be prefixed by "cm-" to create an
-// actual CSS class name. showToken, when enabled, will cause the
-// current token to be highlighted when nothing is selected.
+// actual CSS class name. If wordsOnly is enabled, the matches will be
+// highlighted only if the selected text is a word. showToken, when enabled,
+// will cause the current token to be highlighted when nothing is selected.
+// delay is used to specify how much time to wait, in milliseconds, before
+// highlighting the matches.
 
 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
@@ -28,17 +31,20 @@
   var DEFAULT_MIN_CHARS = 2;
   var DEFAULT_TOKEN_STYLE = "matchhighlight";
   var DEFAULT_DELAY = 100;
+  var DEFAULT_WORDS_ONLY = false;
 
   function State(options) {
     if (typeof options == "object") {
       this.minChars = options.minChars;
       this.style = options.style;
       this.showToken = options.showToken;
       this.delay = options.delay;
+      this.wordsOnly = options.wordsOnly;
     }
     if (this.style == null) this.style = DEFAULT_TOKEN_STYLE;
     if (this.minChars == null) this.minChars = DEFAULT_MIN_CHARS;
     if (this.delay == null) this.delay = DEFAULT_DELAY;
+    if (this.wordsOnly == null) this.delay = DEFAULT_WORDS_ONLY;
     this.overlay = this.timeout = null;
   }
 
@@ -81,12 +87,30 @@
       }
       var from = cm.getCursor("from"), to = cm.getCursor("to");
       if (from.line != to.line) return;
+      if (state.wordsOnly && !isWord(cm, from, to)) return;
       var selection = cm.getRange(from, to).replace(/^\s+|\s+$/g, "");
       if (selection.length >= state.minChars)
         cm.addOverlay(state.overlay = makeOverlay(selection, false, state.style));
     });
   }
 
+  function isWord(cm, from, to) {
+    var str = cm.getRange(from, to);
+    if (str.match(/^\w+$/) !== null) {
+        if (from.ch > 0) {
+            var pos = {line: from.line, ch: from.ch - 1};
+            var chr = cm.getRange(pos, from);
+            if (chr.match(/\W/) === null) return false;
+        }
+        if (to.ch < cm.getLine(from.line).length - 1) {
+            var pos = {line: to.line, ch: to.ch + 1};
+            var chr = cm.getRange(to, pos);
+            if (chr.match(/\W/) === null) return false;
+        }
+        return true;
+    } else return false;
+  }
+
   function boundariesAround(stream, re) {
     return (!stream.start || !re.test(stream.string.charAt(stream.start - 1))) &&
       (stream.pos == stream.string.length || !re.test(stream.string.charAt(stream.pos)));