Added support do do a push-state ajax request with forms

lib/proto/attach-form.js

@@ -0,0 +1,93 @@
+require("../polyfills/Function.prototype.bind")
+
+var on = require("../events/on")
+var clone = require("../clone")
+
+var attrClick = "data-pjax-click-state"
+
+var formAction = function(el, event){
+
+  this.options.requestOptions = {
+    requestUrl : el.getAttribute('action') || window.location.href,
+    requestMethod : el.getAttribute('method') || 'GET',
+  }
+
+  //create a testable virtual link of the form action
+  var virtLinkElement = document.createElement('a');
+  virtLinkElement.setAttribute('href', this.options.requestOptions.requestUrl);
+
+  // Ignore external links.
+  if (virtLinkElement.protocol !== window.location.protocol || virtLinkElement.host !== window.location.host) {
+    el.setAttribute(attrClick, "external");
+    return
+  }
+
+  // Ignore click if we are on an anchor on the same page
+  if (virtLinkElement.pathname === window.location.pathname && virtLinkElement.hash.length > 0) {
+    el.setAttribute(attrClick, "anchor-present");
+    return
+  }
+
+  // Ignore empty anchor "foo.html#"
+  if (virtLinkElement.href === window.location.href.split("#")[0] + "#") {
+    el.setAttribute(attrClick, "anchor-empty")
+    return
+  }
+
+  // if declared as a full reload, just normally submit the form
+  if ( this.options.currentUrlFullReload) {
+    el.setAttribute(attrClick, "reload");
+    return;
+  }
+
+  event.preventDefault()
+
+  var paramObject = [];
+  for(var elementKey in el.elements) {
+    var element = el.elements[elementKey];
+    if (!!element.name && element.attributes !== undefined && element.tagName.toLowerCase() !== 'button'){
+      if ((element.attributes.type !== 'checkbox' && element.attributes.type !== 'radio') || element.checked) {
+        paramObject.push({ name: encodeURIComponent(element.name), value: encodeURIComponent(element.value)});
+      }
+    }
+  }
+
+  //Creating a getString
+  var paramsString = (paramObject.map(function(value){return value.name+"="+value.value;})).join('&');
+
+  this.options.requestOptions.requestPayload = paramObject;
+  this.options.requestOptions.requestPayloadString = paramsString;
+
+  el.setAttribute(attrClick, "submit");
+
+  this.loadUrl(virtLinkElement.href, clone(this.options))
+
+};
+
+var isDefaultPrevented = function(event) {
+  return event.defaultPrevented || event.returnValue === false;
+};
+
+
+module.exports = function(el) {
+  var that = this
+
+  on(el, "submit", function(event) {
+    if (isDefaultPrevented(event)) {
+      return
+    }
+
+    formAction.call(that, el, event)
+  })
+
+  on(el, "keyup", function(event) {
+    if (isDefaultPrevented(event)) {
+      return
+    }
+
+
+    if (event.keyCode == 13) {
+      formAction.call(that, el, event)
+    }
+  }.bind(this))
+}