Highlight the region and yanks and pastes on top of syntax highlighting.

Fixes zsh-users/zsh-syntax-highlighting#165.
Fixes zsh-users/zsh-syntax-highlighting#175.

* danielsh/i165-region-v1:
  Highlight yanks/pastes on top of syntax highlighting.
  Highlight the region on top of syntax highlighting.

zsh-syntax-highlighting.zsh

@@ -92,6 +92,37 @@ _zsh_highlight()
 
     done
 
+    # Re-apply zle_highlight settings
+    () {
+      if (( REGION_ACTIVE )) ; then
+        # zle_highlight[region] defaults to 'standout' if unspecified
+        local region="${${zle_highlight[(r)region:*]#region:}:-standout}"
+        integer start end
+        if (( MARK > CURSOR )) ; then
+          start=$CURSOR end=$MARK
+        else
+          start=$MARK end=$CURSOR
+        fi
+        region_highlight+=("$start $end $region")
+      fi
+    }
+    # YANK_ACTIVE is only available in zsh-5.1.1 and newer
+    (( $+YANK_ACTIVE )) && () {
+      if (( YANK_ACTIVE )) ; then
+        # zle_highlight[paste] defaults to 'standout' if unspecified
+        local paste="${${zle_highlight[(r)paste:*]#paste:}:-standout}"
+        integer start end
+        if (( YANK_END > YANK_START )) ; then
+          start=$YANK_START end=$YANK_END
+        else
+          start=$YANK_END end=$YANK_START
+        fi
+        region_highlight+=("$start $end $paste")
+      fi
+    }
+
+
+
   } always {
     _ZSH_HIGHLIGHT_PRIOR_BUFFER=$BUFFER
     _ZSH_HIGHLIGHT_PRIOR_CURSOR=$CURSOR