protected final void onMouseClick(int var1, int var2, int var3) {
      if(var3 == 0 && this.minecraft.hud.hoveredPlayer != null) {
         if(this.message.length() > 0 && !this.message.endsWith(" ")) {
            this.message = this.message + " ";
         }

         this.message = this.message + this.minecraft.hud.hoveredPlayer;
         var1 = 64 - (this.minecraft.session.username.length() + 2);
         if(this.message.length() > var1) {
            this.message = this.message.substring(0, var1);
         }
      }

   }