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///////////////////////////////////////////////////////////////////////////////
//Copyright (C) 2014 Assaf Urieli
//
//This file is part of Jochre.
//
//Jochre is free software: you can redistribute it and/or modify
//it under the terms of the GNU Affero General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//
//Jochre is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU Affero General Public License for more details.
//
//You should have received a copy of the GNU Affero General Public License
//along with Jochre.  If not, see .
//////////////////////////////////////////////////////////////////////////////
package com.joliciel.jochre.search.alto;

import java.awt.Rectangle;
import java.util.ArrayList;
import java.util.List;

/**
 * A text line (row) in an Alto file. Note that row indexing starts at 0 at the
 * page level, not the textblock level, and continues until the end of the page.
 * This vastly simplifies finding the previous/next row on the page when
 * displaying.
 * 
 * @author Assaf Urieli
 *
 */
public class AltoTextLine {
  private List strings = new ArrayList<>();
  private Rectangle rectangle;
  private AltoTextBlock textBlock;
  private int wordCount = -1;
  private int index = -1;

  public AltoTextLine(AltoTextBlock textBlock, int left, int top, int width, int height) {
    super();
    this.textBlock = textBlock;
    this.rectangle = new Rectangle(left, top, width, height);
    this.index = this.textBlock.getPage().getTextLines().size();
    this.textBlock.getTextLines().add(this);
    this.textBlock.getPage().getTextLines().add(this);
  }

  public List getStrings() {
    return strings;
  }

  public Rectangle getRectangle() {
    return rectangle;
  }

  public AltoTextBlock getTextBlock() {
    return textBlock;
  }

  public int wordCount() {
    if (wordCount < 0) {
      for (AltoString string : this.strings) {
        if (!string.isWhiteSpace())
          wordCount++;
      }
    }
    return wordCount;
  }

  public int getIndex() {
    return index;
  }

  /**
   * Recalculate indexes after merging or other manipulation of contained strings.
   */
  public void recalculate() {
    int i = 0;
    for (AltoString string : this.strings) {
      string.setIndex(i++);
    }
  }

  @Override
  public String toString() {
    return "AltoTextLineImpl [index=" + index + ", strings=" + strings + "]";
  }

}