Fix sanitizer.

--HG--
branch : testing

common/content/buffer.js

@@ -1490,8 +1490,8 @@ const Buffer = Module("buffer", {
 
                     liberator.assert(elements.length > 0);
                     let elem = elements[util.Math.constrain(count, 1, elements.length) - 1];
-                    elem.scrollIntoView();
                     buffer.focusElement(elem);
+                    util.scrollIntoView(elem);
                 }
             },
             { count: true });

common/content/commandline.js

@@ -1034,7 +1034,7 @@ const CommandLine = Module("commandline", {
         sanitize: function (timespan) {
             let range = [0, Number.MAX_VALUE];
             if (liberator.has("sanitizer") && (timespan || options["sanitizetimespan"]))
-                range = sanitizer.getClearRange(timespan || options["sanitizetimespan"]);
+                range = Sanitizer.getClearRange(timespan || options["sanitizetimespan"]);
 
             const self = this;
             this.store.mutate("filter", function (item) {

common/content/sanitizer.js

@@ -19,6 +19,7 @@ const Sanitizer = Module("sanitizer", {
     init: function () {
         const self = this;
         liberator.loadScript("chrome://browser/content/sanitize.js", Sanitizer);
+        Sanitizer.getClearRange = Sanitizer.Sanitizer.getClearRange;
         this.__proto__.__proto__ = new Sanitizer.Sanitizer; // Good enough.
 
         // TODO: remove this version test

common/content/util.js

@@ -673,6 +673,20 @@ const Util = Module("util", {
         return str;
     },
 
+    /**
+     * Scrolls an element into view if and only if it's not already
+     * fully visible.
+     *
+     * @param {Node} elem The element to make visible.
+     */
+    scrollIntoView: function scrollIntoView(elem) {
+        let win = elem.ownerDocument.defaultView;
+        let rect = elem.getBoundingClientRect();
+        if (!(rect && rect.top < win.innerHeight && rect.bottom >= 0 && rect.left < win.innerWidth && rect.right >= 0))
+            elem.scrollIntoView();
+    },
+
+
     /**
      * Returns an array of URLs parsed from <b>str</b>.
      *