Fix bug when checking if elements were parsed already

parse-element.js checks if the element was already parsed by
checking for the `data-pjax-click-state` attribute. However, this
attribute was not added until the link is clicked.

Originally, there was a separate attribute, `data-pjax-enabled`,
which tracked if the element was parsed already, but that was
changed in 9a86044.

This commit merges the attributes for mouse clicks and key presses
into one and adds that attribute when the element is initially
parsed.

lib/proto/attach-link.js

@@ -1,8 +1,7 @@
 var on = require("../events/on")
 var clone = require("../util/clone")
 
-var attrClick = "data-pjax-click-state"
-var attrKey = "data-pjax-keyup-state"
+var attrState = "data-pjax-state"
 
 var linkAction = function(el, event) {
   // Since loadUrl modifies options and we may add our own modifications below,
@@ -11,7 +10,7 @@ var linkAction = function(el, event) {
 
   // Don’t break browser special behavior on links (like page in new window)
   if (event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) {
-    el.setAttribute(attrClick, "modifier")
+    el.setAttribute(attrState, "modifier")
     return
   }
 
@@ -20,25 +19,25 @@ var linkAction = function(el, event) {
 
   // Ignore external links.
   if (el.protocol !== window.location.protocol || el.host !== window.location.host) {
-    el.setAttribute(attrClick, "external")
+    el.setAttribute(attrState, "external")
     return
   }
 
   // Ignore click if we are on an anchor on the same page
   if (el.pathname === window.location.pathname && el.hash.length > 0) {
-    el.setAttribute(attrClick, "anchor-present")
+    el.setAttribute(attrState, "anchor-present")
     return
   }
 
   // Ignore anchors on the same page (keep native behavior)
   if (el.hash && el.href.replace(el.hash, "") === window.location.href.replace(location.hash, "")) {
-    el.setAttribute(attrClick, "anchor")
+    el.setAttribute(attrState, "anchor")
     return
   }
 
   // Ignore empty anchor "foo.html#"
   if (el.href === window.location.href.split("#")[0] + "#") {
-    el.setAttribute(attrClick, "anchor-empty")
+    el.setAttribute(attrState, "anchor-empty")
     return
   }
 
@@ -49,12 +48,12 @@ var linkAction = function(el, event) {
     this.options.currentUrlFullReload &&
     el.href === window.location.href.split("#")[0]
   ) {
-    el.setAttribute(attrClick, "reload")
+    el.setAttribute(attrState, "reload")
     this.reload()
     return
   }
 
-  el.setAttribute(attrClick, "load")
+  el.setAttribute(attrState, "load")
 
   options.triggerElement = el
   this.loadUrl(el.href, options)
@@ -71,6 +70,7 @@ module.exports = function(el) {
     if (isDefaultPrevented(event)) {
       return
     }
+  el.setAttribute(attrState, "")
 
     linkAction.call(that, el, event)
   })
@@ -80,12 +80,6 @@ module.exports = function(el) {
       return
     }
 
-    // Don’t break browser special behavior on links (like page in new window)
-    if (event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) {
-      el.setAttribute(attrKey, "modifier")
-      return
-    }
-
     if (event.keyCode === 13) {
       linkAction.call(that, el, event)
     }

lib/proto/parse-element.js

@@ -2,14 +2,14 @@ module.exports = function(el) {
   switch (el.tagName.toLowerCase()) {
     case "a":
       // only attach link if el does not already have link attached
-      if (!el.hasAttribute("data-pjax-click-state")) {
+      if (!el.hasAttribute("data-pjax-state")) {
         this.attachLink(el)
       }
       break
 
     case "form":
       // only attach link if el does not already have link attached
-      if (!el.hasAttribute("data-pjax-click-state")) {
+      if (!el.hasAttribute("data-pjax-state")) {
         this.attachForm(el)
       }
       break