text: /*
   * Copyright (c) 2020 Samsung Electronics Co., Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  
  // CLASS HEADER
  #include "contact-card-layouter.h"
  
  // INTERNAL INCLUDES
  #include "contact-card.h"
  
  using namespace Dali;
  
  namespace
  {
  const float DEFAULT_PADDING = 25.0f;
  
  const float MINIMUM_ITEMS_PER_ROW_OR_COLUMN(3.0f);
  
  const float   HEADER_HEIGHT_TO_UNFOLDED_SIZE_RATIO(0.1f);
  const Vector2 HEADER_FOLDED_POSITION_AS_RATIO_OF_SIZE(-0.05f, -1.5f);
  const Vector2 HEADER_UNFOLDED_POSITION(Vector2::ZERO);
  
  const float   IMAGE_SIZE_AS_RATIO_TO_FOLDED_SIZE(0.5f);
  const Vector2 IMAGE_FOLDED_POSITION_AS_RATIO_OF_SIZE(0.5f, 0.25f);
  
  const float FOLDED_TEXT_POSITION_AS_RATIO_OF_IMAGE_SIZE(1.01f);
  } // unnamed namespace
  
  ContactCardLayouter::ContactCardLayouter()
  : mContactCardLayoutInfo(),
    mContactCards(),
    mLastPosition(),
    mPositionIncrementer(),
    mItemsPerRow(0),
    mInitialized(false)
  {
  }
  
  ContactCardLayouter::~ContactCardLayouter()
  {
    // Nothing to do as ContactCardContainer uses intrusive pointers so they will be automatically deleted
  }
  
  void ContactCardLayouter::AddContact(Dali::Window window, const std::string& contactName, const std::string& contactAddress, const std::string& imagePath)
  {
    if(!mInitialized)
    {
      // Set up the common layouting info shared between all contact cards when first called
  
      mContactCardLayoutInfo.unfoldedPosition = mContactCardLayoutInfo.padding = Vector2(DEFAULT_PADDING, DEFAULT_PADDING);
      mContactCardLayoutInfo.unfoldedSize                                      = Vector2(window.GetSize()) - mContactCardLayoutInfo.padding * (MINIMUM_ITEMS_PER_ROW_OR_COLUMN - 1.0f);
  
      // Calculate the size of the folded card (use the minimum of width/height as size)
      mContactCardLayoutInfo.foldedSize       = (mContactCardLayoutInfo.unfoldedSize - (mContactCardLayoutInfo.padding * (MINIMUM_ITEMS_PER_ROW_OR_COLUMN - 1.0f))) / MINIMUM_ITEMS_PER_ROW_OR_COLUMN;
      mContactCardLayoutInfo.foldedSize.width = mContactCardLayoutInfo.foldedSize.height = std::min(mContactCardLayoutInfo.foldedSize.width, mContactCardLayoutInfo.foldedSize.height);
  
      // Set the size and positions of the header
      mContactCardLayoutInfo.headerSize.width       = mContactCardLayoutInfo.unfoldedSize.width;
      mContactCardLayoutInfo.headerSize.height      = mContactCardLayoutInfo.unfoldedSize.height * HEADER_HEIGHT_TO_UNFOLDED_SIZE_RATIO;
      mContactCardLayoutInfo.headerFoldedPosition   = mContactCardLayoutInfo.headerSize * HEADER_FOLDED_POSITION_AS_RATIO_OF_SIZE;
      mContactCardLayoutInfo.headerUnfoldedPosition = HEADER_UNFOLDED_POSITION;
  
      // Set the image size and positions
      mContactCardLayoutInfo.imageSize               = mContactCardLayoutInfo.foldedSize * IMAGE_SIZE_AS_RATIO_TO_FOLDED_SIZE;
      mContactCardLayoutInfo.imageFoldedPosition     = mContactCardLayoutInfo.imageSize * IMAGE_FOLDED_POSITION_AS_RATIO_OF_SIZE;
      mContactCardLayoutInfo.imageUnfoldedPosition.x = mContactCardLayoutInfo.padding.width;
      mContactCardLayoutInfo.imageUnfoldedPosition.y = mContactCardLayoutInfo.headerSize.height + mContactCardLayoutInfo.padding.height;
  
      // Set the positions of the contact name
      mContactCardLayoutInfo.textFoldedPosition.x   = 0.0f;
      mContactCardLayoutInfo.textFoldedPosition.y   = mContactCardLayoutInfo.imageFoldedPosition.x + mContactCardLayoutInfo.imageSize.height * FOLDED_TEXT_POSITION_AS_RATIO_OF_IMAGE_SIZE;
      mContactCardLayoutInfo.textUnfoldedPosition.x = mContactCardLayoutInfo.padding.width;
      mContactCardLayoutInfo.textUnfoldedPosition.y = mContactCardLayoutInfo.imageUnfoldedPosition.y + mContactCardLayoutInfo.imageSize.height + mContactCardLayoutInfo.padding.height;
  
      // Figure out the positions of the contact cards
      mItemsPerRow           = (mContactCardLayoutInfo.unfoldedSize.width + mContactCardLayoutInfo.padding.width) / (mContactCardLayoutInfo.foldedSize.width + mContactCardLayoutInfo.padding.width);
      mLastPosition          = mContactCardLayoutInfo.unfoldedPosition;
      mPositionIncrementer.x = mContactCardLayoutInfo.foldedSize.width + mContactCardLayoutInfo.padding.width;
      mPositionIncrementer.y = mContactCardLayoutInfo.foldedSize.height + mContactCardLayoutInfo.padding.height;
  
      mInitialized = true;
    }
  
    // Create a new contact card and add to our container
    mContactCards.push_back(new ContactCard(window, mContactCardLayoutInfo, contactName, contactAddress, imagePath, NextCardPosition()));
  }
  
  const Vector2& ContactCardLayouter::NextCardPosition()
  {
    size_t currentNumOfCards = mContactCards.size();
  
    if(currentNumOfCards)
    {
      if(currentNumOfCards % mItemsPerRow)
      {
        mLastPosition.x += mPositionIncrementer.x;
      }
      else // go to the next row
      {
        mLastPosition.x = mContactCardLayoutInfo.unfoldedPosition.x;
        mLastPosition.y += mPositionIncrementer.y;
      }
    }
    return mLastPosition;
  }
  