text: /****************************************************************************
  Copyright (c) 2008-2010 Ricardo Quesada
  Copyright (c) 2010-2012 cocos2d-x.org
  Copyright (c) 2013-2016 Chukong Technologies Inc.
  Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
  
  http://www.cocos2d-x.org
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
  ****************************************************************************/
  #include "2d/CCMenu.h"
  #include "2d/CCCamera.h"
  #include "base/CCDirector.h"
  #include "base/CCTouch.h"
  #include "base/CCEventListenerTouch.h"
  #include "base/CCEventDispatcher.h"
  #include "base/ccUTF8.h"
  #include "platform/CCStdC.h"
  
  #include <vector>
  
  using namespace std;
  
  NS_CC_BEGIN
  
  enum
  {
      kDefaultPadding = 5,
  };
  
  //
  // CCMenu
  //
  
  Menu::~Menu()
  {
      CCLOGINFO("In the destructor of Menu. %p", this);
  }
  
  Menu* Menu::create()
  {
      return Menu::create(nullptr, nullptr);
  }
  
  Menu* Menu::create(MenuItem* item, ...)
  {
      va_list args;
      va_start(args, item);
  
      Menu* ret = Menu::createWithItems(item, args);
  
      va_end(args);
  
      return ret;
  }
  
  Menu* Menu::createWithArray(const Vector<MenuItem*>& arrayOfItems)
  {
      auto ret = new Menu();
      if (ret->initWithArray(arrayOfItems))
      {
          ret->autorelease();
      }
      else
      {
          CC_SAFE_DELETE(ret);
      }
  
      return ret;
  }
  
  Menu* Menu::createWithItems(MenuItem* item, va_list args)
  {
      Vector<MenuItem*> items;
      if (item)
      {
          items.pushBack(item);
          MenuItem* i = va_arg(args, MenuItem*);
          while (i)
          {
              items.pushBack(i);
              i = va_arg(args, MenuItem*);
          }
      }
  
      return Menu::createWithArray(items);
  }
  
  Menu* Menu::createWithItem(MenuItem* item)
  {
      return Menu::create(item, nullptr);
  }
  
  bool Menu::init()
  {
      return initWithArray(Vector<MenuItem*>());
  }
  
  bool Menu::initWithArray(const Vector<MenuItem*>& arrayOfItems)
  {
      if (Layer::init())
      {
          _enabled = true;
          // menu in the center of the screen
          Vec2 s = _director->getWinSize();
  
          this->setIgnoreAnchorPointForPosition(true);
          setAnchorPoint(Vec2(0.5f, 0.5f));
          this->setContentSize(s);
  
          setPosition(s.width / 2, s.height / 2);
  
          int z = 0;
  
          for (auto& item : arrayOfItems)
          {
              this->addChild(item, z);
              z++;
          }
  
          _selectedItem = nullptr;
          _state        = Menu::State::WAITING;
  
          // enable cascade color and opacity on menus
          setCascadeColorEnabled(true);
          setCascadeOpacityEnabled(true);
  
          auto touchListener = EventListenerTouchOneByOne::create();
          touchListener->setSwallowTouches(true);
  
          touchListener->onTouchBegan     = CC_CALLBACK_2(Menu::onTouchBegan, this);
          touchListener->onTouchMoved     = CC_CALLBACK_2(Menu::onTouchMoved, this);
          touchListener->onTouchEnded     = CC_CALLBACK_2(Menu::onTouchEnded, this);
          touchListener->onTouchCancelled = CC_CALLBACK_2(Menu::onTouchCancelled, this);
  
          _eventDispatcher->addEventListenerWithSceneGraphPriority(touchListener, this);
  
          return true;
      }
      return false;
  }
  
  /*
   * override add:
   */
  void Menu::addChild(Node* child)
  {
      Layer::addChild(child);
  }
  
  void Menu::addChild(Node* child, int zOrder)
  {
      Layer::addChild(child, zOrder);
  }
  
  void Menu::addChild(Node* child, int zOrder, int tag)
  {
      CCASSERT(dynamic_cast<MenuItem*>(child) != nullptr, "Menu only supports MenuItem objects as children");
      Layer::addChild(child, zOrder, tag);
  }
  
  void Menu::addChild(Node* child, int zOrder, std::string_view name)
  {
      CCASSERT(dynamic_cast<MenuItem*>(child) != nullptr, "Menu only supports MenuItem objects as children");
      Layer::addChild(child, zOrder, name);
  }
  
  void Menu::onEnter()
  {
      Layer::onEnter();
  }
  
  void Menu::onExit()
  {
      if (_state == Menu::State::TRACKING_TOUCH)
      {
          if (_selectedItem)
          {
              _selectedItem->unselected();
              _selectedItem = nullptr;
          }
  
          _state = Menu::State::WAITING;
      }
  
      Layer::onExit();
  }
  
  void Menu::removeChild(Node* child, bool cleanup)
  {
      CCASSERT(dynamic_cast<MenuItem*>(child) != nullptr, "Menu only supports MenuItem objects as children");
  
      if (_selectedItem == child)
      {
          _selectedItem = nullptr;
      }
  
      Node::removeChild(child, cleanup);
  }
  
  // Menu - Events
  
  bool Menu::onTouchBegan(Touch* touch, Event* /*event*/)
  {
      auto camera = Camera::getVisitingCamera();
      if (_state != Menu::State::WAITING || !_visible || !_enabled || !camera)
      {
          return false;
      }
  
      for (Node* c = this->_parent; c != nullptr; c = c->getParent())
      {
          if (c->isVisible() == false)
          {
              return false;
          }
      }
      _selectedItem = this->getItemForTouch(touch, camera);
  
      if (_selectedItem)
      {
          _state              = Menu::State::TRACKING_TOUCH;
          _selectedWithCamera = camera;
          _selectedItem->selected();
  
          return true;
      }
  
      return false;
  }
  
  void Menu::onTouchEnded(Touch* /*touch*/, Event* /*event*/)
  {
      CCASSERT(_state == Menu::State::TRACKING_TOUCH, "[Menu ccTouchEnded] -- invalid state");
      this->retain();
      if (_selectedItem)
      {
          _selectedItem->unselected();
          _selectedItem->activate();
      }
      _state              = Menu::State::WAITING;
      _selectedWithCamera = nullptr;
      this->release();
  }
  
  void Menu::onTouchCancelled(Touch* /*touch*/, Event* /*event*/)
  {
      CCASSERT(_state == Menu::State::TRACKING_TOUCH, "[Menu ccTouchCancelled] -- invalid state");
      this->retain();
      if (_selectedItem)
      {
          _selectedItem->unselected();
      }
      _state = Menu::State::WAITING;
      this->release();
  }
  
  void Menu::onTouchMoved(Touch* touch, Event* /*event*/)
  {
      CCASSERT(_state == Menu::State::TRACKING_TOUCH, "[Menu ccTouchMoved] -- invalid state");
      MenuItem* currentItem = this->getItemForTouch(touch, _selectedWithCamera);
      if (currentItem != _selectedItem)
      {
          if (_selectedItem)
          {
              _selectedItem->unselected();
          }
          _selectedItem = currentItem;
          if (_selectedItem)
          {
              _selectedItem->selected();
          }
      }
  }
  
  // Menu - Alignment
  void Menu::alignItemsVertically()
  {
      this->alignItemsVerticallyWithPadding(kDefaultPadding);
  }
  
  void Menu::alignItemsVerticallyWithPadding(float padding)
  {
      float height = -padding;
  
      for (const auto& child : _children)
          height += child->getContentSize().height * child->getScaleY() + padding;
  
      float y = height / 2.0f;
  
      for (const auto& child : _children)
      {
          child->setPosition(0, y - child->getContentSize().height * child->getScaleY() / 2.0f);
          y -= child->getContentSize().height * child->getScaleY() + padding;
      }
  }
  
  void Menu::alignItemsHorizontally()
  {
      this->alignItemsHorizontallyWithPadding(kDefaultPadding);
  }
  
  void Menu::alignItemsHorizontallyWithPadding(float padding)
  {
      float width = -padding;
      for (const auto& child : _children)
          width += child->getContentSize().width * child->getScaleX() + padding;
  
      float x = -width / 2.0f;
  
      for (const auto& child : _children)
      {
          child->setPosition(x + child->getContentSize().width * child->getScaleX() / 2.0f, 0);
          x += child->getContentSize().width * child->getScaleX() + padding;
      }
  }
  
  void Menu::alignItemsInColumns(int columns, ...)
  {
      va_list args;
      va_start(args, columns);
  
      this->alignItemsInColumns(columns, args);
  
      va_end(args);
  }
  
  void Menu::alignItemsInColumns(int columns, va_list args)
  {
      CCASSERT(columns >= 0, "Columns must be >= 0");
      ValueVector rows;
      while (columns)
      {
          rows.push_back(Value(columns));
          columns = va_arg(args, int);
      }
      alignItemsInColumnsWithArray(rows);
  }
  
  void Menu::alignItemsInColumnsWithArray(const ValueVector& rows)
  {
      int height          = -5;
      size_t row          = 0;
      int rowHeight       = 0;
      int columnsOccupied = 0;
      int rowColumns      = 0;
  
      for (const auto& child : _children)
      {
          CCASSERT(row < rows.size(), "row should less than rows.size()!");
  
          rowColumns = rows[row].asInt();
          // can not have zero columns on a row
          CCASSERT(rowColumns, "rowColumns can't be 0.");
  
          float tmp = child->getContentSize().height;
          rowHeight = (unsigned int)((rowHeight >= tmp || isnan(tmp)) ? rowHeight : tmp);
  
          ++columnsOccupied;
          if (columnsOccupied >= rowColumns)
          {
              height += rowHeight + 5;
  
              columnsOccupied = 0;
              rowHeight       = 0;
              ++row;
          }
      }
  
      // check if too many rows/columns for available menu items
      CCASSERT(!columnsOccupied, "columnsOccupied should be 0.");
  
      Vec2 winSize = getContentSize();
  
      row        = 0;
      rowHeight  = 0;
      rowColumns = 0;
      float w    = 0.0;
      float x    = 0.0;
      float y    = (float)(height / 2);
  
      for (const auto& child : _children)
      {
          if (rowColumns == 0)
          {
              rowColumns = rows[row].asInt();
              w          = winSize.width / (1 + rowColumns);
              x          = w;
          }
  
          float tmp = child->getContentSize().height;
          rowHeight = (unsigned int)((rowHeight >= tmp || isnan(tmp)) ? rowHeight : tmp);
  
          child->setPosition(x - winSize.width / 2, y - child->getContentSize().height / 2);
  
          x += w;
          ++columnsOccupied;
  
          if (columnsOccupied >= rowColumns)
          {
              y -= rowHeight + 5;
  
              columnsOccupied = 0;
              rowColumns      = 0;
              rowHeight       = 0;
              ++row;
          }
      }
  }
  
  void Menu::alignItemsInRows(int rows, ...)
  {
      va_list args;
      va_start(args, rows);
  
      this->alignItemsInRows(rows, args);
  
      va_end(args);
  }
  
  void Menu::alignItemsInRows(int rows, va_list args)
  {
      ValueVector array;
      while (rows)
      {
          array.push_back(Value(rows));
          rows = va_arg(args, int);
      }
      alignItemsInRowsWithArray(array);
  }
  
  void Menu::alignItemsInRowsWithArray(const ValueVector& columns)
  {
      vector<int> columnWidths;
      vector<int> columnHeights;
  
      int width        = -10;
      int columnHeight = -5;
      size_t column    = 0;
      int columnWidth  = 0;
      int rowsOccupied = 0;
      int columnRows;
  
      for (const auto& child : _children)
      {
          // check if too many menu items for the amount of rows/columns
          CCASSERT(column < columns.size(), "column should be less than columns.size().");
  
          columnRows = columns[column].asInt();
          // can't have zero rows on a column
          CCASSERT(columnRows, "columnRows can't be 0.");
  
          // columnWidth = fmaxf(columnWidth, [item contentSize].width);
          float tmp   = child->getContentSize().width;
          columnWidth = (unsigned int)((columnWidth >= tmp || isnan(tmp)) ? columnWidth : tmp);
  
          columnHeight += (int)(child->getContentSize().height + 5);
          ++rowsOccupied;
  
          if (rowsOccupied >= columnRows)
          {
              columnWidths.push_back(columnWidth);
              columnHeights.push_back(columnHeight);
              width += columnWidth + 10;
  
              rowsOccupied = 0;
              columnWidth  = 0;
              columnHeight = -5;
              ++column;
          }
      }
  
      // check if too many rows/columns for available menu items.
      CCASSERT(!rowsOccupied, "rowsOccupied should be 0.");
  
      Vec2 winSize = getContentSize();
  
      column      = 0;
      columnWidth = 0;
      columnRows  = 0;
      float x     = (float)(-width / 2);
      float y     = 0.0;
  
      for (const auto& child : _children)
      {
          if (columnRows == 0)
          {
              columnRows = columns[column].asInt();
              y          = (float)columnHeights[column];
          }
  
          // columnWidth = fmaxf(columnWidth, [item contentSize].width);
          float tmp   = child->getContentSize().width;
          columnWidth = (unsigned int)((columnWidth >= tmp || isnan(tmp)) ? columnWidth : tmp);
  
          child->setPosition(x + columnWidths[column] / 2, y - winSize.height / 2);
  
          y -= child->getContentSize().height + 10;
          ++rowsOccupied;
  
          if (rowsOccupied >= columnRows)
          {
              x += columnWidth + 5;
              rowsOccupied = 0;
              columnRows   = 0;
              columnWidth  = 0;
              ++column;
          }
      }
  }
  
  MenuItem* Menu::getItemForTouch(Touch* touch, const Camera* camera)
  {
      Vec2 touchLocation = touch->getLocation();
      for (const auto& item : _children)
      {
          MenuItem* child = dynamic_cast<MenuItem*>(item);
          if (nullptr == child || false == child->isVisible() || false == child->isEnabled())
          {
              continue;
          }
          Rect rect;
          rect.size = child->getContentSize();
          if (isScreenPointInRect(touchLocation, camera, child->getWorldToNodeTransform(), rect, nullptr))
          {
              return child;
          }
      }
      return nullptr;
  }
  
  void Menu::setOpacityModifyRGB(bool /*value*/) {}
  
  bool Menu::isOpacityModifyRGB() const
  {
      return false;
  }
  
  std::string Menu::getDescription() const
  {
      return StringUtils::format("<Menu | Tag = %d>", _tag);
  }
  
  NS_CC_END
  