Revert "Update ZeroClipboard and remove Copy buttons when Flash is unavailable"

This reverts commit 229e888929.

ZeroClipboard v2.x drops IE < 9 support.

docs/assets/js/src/application.js

@@ -127,7 +127,7 @@
 
     // Config ZeroClipboard
     ZeroClipboard.config({
-      swfPath: '/assets/flash/ZeroClipboard.swf',
+      moviePath: '/assets/flash/ZeroClipboard.swf',
       hoverClass: 'btn-clipboard-hover'
     })
 
@@ -136,38 +136,39 @@
       var btnHtml = '<div class="zero-clipboard"><span class="btn-clipboard">Copy</span></div>'
       $(this).before(btnHtml)
     })
-
     var zeroClipboard = new ZeroClipboard($('.btn-clipboard'))
     var htmlBridge = $('#global-zeroclipboard-html-bridge')
 
     // Handlers for ZeroClipboard
-    zeroClipboard.on('ready', function () {
+    zeroClipboard.on('load', function () {
       htmlBridge
         .data('placement', 'top')
         .attr('title', 'Copy to clipboard')
         .tooltip()
-
-      // Copy to clipboard
-      zeroClipboard.on('copy', function (event) {
-        var highlight = $(event.target).parent().nextAll('.highlight').first()
-        event.clipboardData.setData('text/plain', highlight.text())
-      })
-
-      // Notify copy success and reset tooltip title
-      zeroClipboard.on('aftercopy', function () {
-        htmlBridge
-          .attr('title', 'Copied!')
-          .tooltip('fixTitle')
-          .tooltip('show')
-          .attr('title', 'Copy to clipboard')
-          .tooltip('fixTitle')
-      })
     })
 
-    // Hide copy button on error
-    zeroClipboard.on('error', function () {
-      $('.zero-clipboard').remove()
-      ZeroClipboard.destroy()
+    // Copy to clipboard
+    zeroClipboard.on('dataRequested', function (client) {
+      var highlight = $(this).parent().nextAll('.highlight').first()
+      client.setText(highlight.text())
+    })
+
+    // Notify copy success and reset tooltip title
+    zeroClipboard.on('complete', function () {
+      htmlBridge
+        .attr('title', 'Copied!')
+        .tooltip('fixTitle')
+        .tooltip('show')
+        .attr('title', 'Copy to clipboard')
+        .tooltip('fixTitle')
+    })
+
+    // Notify copy failure
+    zeroClipboard.on('noflash wrongflash', function () {
+      htmlBridge
+        .attr('title', 'Flash required')
+        .tooltip('fixTitle')
+        .tooltip('show')
     })
 
   })