placeholder.js in placeholder-gem-3.0.2

- old
+ new

@@ -1,12 +1,12 @@
 /*
  * The MIT License
  *
  * Copyright (c) 2012 James Allardice
  *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), 
- * to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
@@ -74,10 +74,11 @@
             changeType: changeType
         }
     };
 
 }(this));
+
 (function (global) {
 
     "use strict";
 
     var validTypes = [
@@ -139,10 +140,20 @@
         hideOnInput, liveUpdates, keydownVal, styleElem, styleRules, placeholder, timer, form, elem, len, i;
 
     // No-op (used in place of public methods when native support is detected)
     function noop() {}
 
+    // Avoid IE9 activeElement of death when an iframe is used.
+    // More info:
+    // http://bugs.jquery.com/ticket/13393
+    // https://github.com/jquery/jquery/commit/85fc5878b3c6af73f42d61eedf73013e7faae408
+    function safeActiveElement() {
+        try {
+            return document.activeElement;
+        } catch (err) {}
+    }
+
     // Hide the placeholder value on a single element. Returns true if the placeholder was hidden and false if it was not (because it wasn't visible in the first place)
     function hidePlaceholder(elem, keydownValue) {
         var type,
             maxLength,
             valueChanged = (!!keydownValue && elem.value !== keydownValue),
@@ -153,11 +164,11 @@
             elem.value = elem.value.replace(elem.getAttribute(ATTR_CURRENT_VAL), "");
             elem.className = elem.className.replace(classNameRegExp, "");
 
             // Restore the maxlength value
             maxLength = elem.getAttribute(ATTR_MAXLENGTH);
-            if (maxLength) {
+            if (parseInt(maxLength, 10) >= 0) { // Old FF returns -1 if attribute not set (see GH-56)
                 elem.setAttribute("maxLength", maxLength);
                 elem.removeAttribute(ATTR_MAXLENGTH);
             }
 
             // If the polyfill has changed the type of the element we need to change it back
@@ -201,24 +212,27 @@
         return false;
     }
 
     function handleElem(node, callback) {
 
-        var handleInputs, handleTextareas, elem, len, i;
+        var handleInputsLength, handleTextareasLength, handleInputs, handleTextareas, elem, len, i;
 
         // Check if the passed in node is an input/textarea (in which case it can't have any affected descendants)
         if (node && node.getAttribute(ATTR_CURRENT_VAL)) {
             callback(node);
         } else {
 
             // If an element was passed in, get all affected descendants. Otherwise, get all affected elements in document
             handleInputs = node ? node.getElementsByTagName("input") : inputs;
             handleTextareas = node ? node.getElementsByTagName("textarea") : textareas;
 
+            handleInputsLength = handleInputs ? handleInputs.length : 0;
+            handleTextareasLength = handleTextareas ? handleTextareas.length : 0;
+
             // Run the callback for each element
-            for (i = 0, len = handleInputs.length + handleTextareas.length; i < len; i++) {
-                elem = i < handleInputs.length ? handleInputs[i] : handleTextareas[i - handleInputs.length];
+            for (i = 0, len = handleInputsLength + handleTextareasLength; i < len; i++) {
+                elem = i < handleInputsLength ? handleInputs[i] : handleTextareas[i - handleInputsLength];
                 callback(elem);
             }
         }
     }
 
@@ -284,11 +298,11 @@
             }
         };
     }
     function makeClickHandler(elem) {
         return function () {
-            if (elem === document.activeElement && elem.value === elem.getAttribute(ATTR_CURRENT_VAL) && elem.getAttribute(ATTR_ACTIVE) === "true") {
+            if (elem === safeActiveElement() && elem.value === elem.getAttribute(ATTR_CURRENT_VAL) && elem.getAttribute(ATTR_ACTIVE) === "true") {
                 Utils.moveCaret(elem, 0);
             }
         };
     }
 
@@ -306,10 +320,15 @@
 
         // If the element is part of a form, make sure the placeholder string is not submitted as a value
         if (elem.form) {
             form = elem.form;
 
+            // If the type of the property is a string then we have a "form" attribute and need to get the real form
+            if (typeof form === "string") {
+                form = document.getElementById(form);
+            }
+
             // Set a flag on the form so we know it's been handled (forms can contain multiple inputs)
             if (!form.getAttribute(ATTR_FORM_HANDLED)) {
                 Utils.addEventListener(form, "submit", makeSubmitHandler(form));
                 form.setAttribute(ATTR_FORM_HANDLED, "true");
             }
@@ -329,11 +348,11 @@
         // Remember that we've bound event handlers to this element
         elem.setAttribute(ATTR_EVENTS_BOUND, "true");
         elem.setAttribute(ATTR_CURRENT_VAL, placeholder);
 
         // If the element doesn't have a value and is not focussed, set it to the placeholder string
-        if (hideOnInput || elem !== document.activeElement) {
+        if (hideOnInput || elem !== safeActiveElement()) {
             showPlaceholder(elem);
         }
     }
 
     Placeholders.nativeSupport = test.placeholder !== void 0;
@@ -426,9 +445,13 @@
             if (!liveUpdates) {
                 clearInterval(timer);
             }
         }, 100);
     }
+
+    Utils.addEventListener(global, "beforeunload", function () {
+        Placeholders.disable();
+    });
 
     // Expose public methods
     Placeholders.disable = Placeholders.nativeSupport ? noop : disablePlaceholders;
     Placeholders.enable = Placeholders.nativeSupport ? noop : enablePlaceholders;
 