using System;
using System.Text;
using System.Collections;
using System.util;
using iTextSharp.text.factories;

/*
 * $Id: Section.cs,v 1.17 2008/05/13 11:25:13 psoares33 Exp $
 * 
 *
 * Copyright 1999, 2000, 2001, 2002 by Bruno Lowagie.
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library 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 Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

namespace iTextSharp.text {
    /// <summary>
    /// A Section is a part of a Document containing
    /// other Sections, Paragraphs, List
    /// and/or Tables.
    /// </summary>
    /// <remarks>
    /// You can not construct a Section yourself.
    /// You will have to ask an instance of Section to the
    /// Chapter or Section to which you want to
    /// add the new Section.
    /// </remarks>
    /// <example>
    /// <code>
    /// Paragraph title2 = new Paragraph("This is Chapter 2", FontFactory.GetFont(FontFactory.HELVETICA, 18, Font.BOLDITALIC, new Color(0, 0, 255)));
    /// Chapter chapter2 = new Chapter(title2, 2);
    /// Paragraph someText = new Paragraph("This is some text");
    /// chapter2.Add(someText);
    /// Paragraph title21 = new Paragraph("This is Section 1 in Chapter 2", FontFactory.GetFont(FontFactory.HELVETICA, 16, Font.BOLD, new Color(255, 0, 0)));
    /// <strong>Section section1 = chapter2.AddSection(title21);</strong>
    /// Paragraph someSectionText = new Paragraph("This is some silly paragraph in a chapter and/or section. It contains some text to test the functionality of Chapters and Section.");
    /// <strong>section1.Add(someSectionText);</strong>
    /// Paragraph title211 = new Paragraph("This is SubSection 1 in Section 1 in Chapter 2", FontFactory.GetFont(FontFactory.HELVETICA, 14, Font.BOLD, new Color(255, 0, 0)));
    /// <strong>Section section11 = section1.AddSection(40, title211, 2);
    /// section11.Add(someSectionText);</strong>strong>
    /// </code>
    /// </example>
    public class Section : ArrayList, ITextElementArray, ILargeElement {
        
        // constant
        /**
        * A possible number style. The default number style: "1.2.3."
        * @since   iText 2.0.8
        */
        public const int NUMBERSTYLE_DOTTED = 0;
        /**
        * A possible number style. For instance: "1.2.3"
        * @since   iText 2.0.8
        */
        public const int NUMBERSTYLE_DOTTED_WITHOUT_FINAL_DOT = 1;
        
        // membervariables
    
        ///<summary> This is the title of this section. </summary>
        protected Paragraph title;
    
        ///<summary> This is the number of sectionnumbers that has to be shown before the section title. </summary>
        protected int numberDepth;
    
        /**
        * The style for sectionnumbers.
        * @since    iText 2.0.8
        */
        protected int numberStyle = NUMBERSTYLE_DOTTED;
        
        ///<summary> The indentation of this section on the left side. </summary>
        protected float indentationLeft;
    
        ///<summary> The indentation of this section on the right side. </summary>
        protected float indentationRight;
    
        ///<summary> The additional indentation of the content of this section. </summary>
        protected float indentation;
    
        ///<summary> This is the number of subsections. </summary>
        protected int subsections = 0;
    
        ///<summary> This is the complete list of sectionnumbers of this section and the parents of this section. </summary>
        protected internal ArrayList numbers = null;
    
    /**
        * Indicates if the Section will be complete once added to the document.
        * @since   iText 2.0.8
        */
        protected bool complete = true;
        
        /**
        * Indicates if the Section was added completely to the document.
        * @since   iText 2.0.8
        */
        protected bool addedCompletely = false;
        
        /**
        * Indicates if this is the first time the section was added.
        * @since   iText 2.0.8
        */
        protected bool notAddedYet = true;
        
        ///<summary> false if the bookmark children are not visible </summary>
        protected bool bookmarkOpen = true;
    
        /** true if the section has to trigger a new page */
        protected bool triggerNewPage = false;

        /** The bookmark title if different from the content title */
        protected string bookmarkTitle;

        // constructors
    
        /// <summary>
        /// Constructs a new Section.
        /// </summary>
        /// <overloads>
        /// Has 2 overloads.
        /// </overloads>
        protected internal Section() {
            title = new Paragraph();
            numberDepth = 1;
        }
    
        /// <summary>
        /// Constructs a new Section.
        /// </summary>
        /// <param name="title">a Paragraph</param>
        /// <param name="numberDepth">the numberDepth</param>
        protected internal Section(Paragraph title, int numberDepth) {
            this.numberDepth = numberDepth;
            this.title = title;
        }
    
        // private methods
    
        /// <summary>
        /// Sets the number of this section.
        /// </summary>
        /// <param name="number">the number of this section</param>
        /// <param name="numbers">an ArrayList, containing the numbers of the Parent</param>
        private void SetNumbers(int number, ArrayList numbers) {
            this.numbers = new ArrayList();
            this.numbers.Add(number);
            this.numbers.AddRange(numbers);
        }
    
        // implementation of the Element-methods
    
        /// <summary>
        /// Processes the element by adding it (or the different parts) to an
        /// IElementListener.
        /// </summary>
        /// <param name="listener">the IElementListener</param>
        /// <returns>true if the element was processed successfully</returns>
        public bool Process(IElementListener listener) {
            try {
                foreach (IElement ele in this) {
                    listener.Add(ele);
                }
                return true;
            }
            catch (DocumentException) {
                return false;
            }
        }
    
        /// <summary>
        /// Gets the type of the text element.
        /// </summary>
        /// <value>a type</value>
        public virtual int Type {
            get {
                return Element.SECTION;
            }
        }
    
        /// <summary>
        /// Gets all the chunks in this element.
        /// </summary>
        /// <value>an ArrayList</value>
        public ArrayList Chunks {
            get {
                ArrayList tmp = new ArrayList();
                foreach (IElement ele in this) {
                    tmp.AddRange(ele.Chunks);
                }
                return tmp;
            }
        }
    
        /**
        * @see com.lowagie.text.Element#isContent()
        * @since   iText 2.0.8
        */
        public bool IsContent() {
            return true;
        }

        /**
        * @see com.lowagie.text.Element#isNestable()
        * @since   iText 2.0.8
        */
        public virtual bool IsNestable() {
            return false;
        }
        
        // overriding some of the ArrayList-methods
    
        /// <summary>
        /// Adds a Paragraph, List or Table
        /// to this Section.
        /// </summary>
        /// <param name="index">index at which the specified element is to be inserted</param>
        /// <param name="o">an object of type Paragraph, List or Table</param>
        public void Add(int index, Object o) {
            if (AddedCompletely) {
                throw new InvalidOperationException("This LargeElement has already been added to the Document.");
            }
            try {
                IElement element = (IElement) o;
                if (element.IsNestable()) {
                    base.Insert(index, element);
                }
                else {
                    throw new Exception(element.Type.ToString());
                }
            }
            catch (Exception cce) {
                throw new Exception("Insertion of illegal Element: " + cce.Message);
            }
        }
    
        /// <summary>
        /// Adds a Paragraph, List, Table or another Section
        /// to this Section.
        /// </summary>
        /// <param name="o">an object of type Paragraph, List, Table or another Section</param>
        /// <returns>a bool</returns>
        public new bool Add(Object o) {
            try {
                IElement element = (IElement) o;
                if (element.Type == Element.SECTION) {
                    Section section = (Section) o;
                    section.SetNumbers(++subsections, numbers);
                    base.Add(section);
                    return true;
                }
                else if (o is MarkedSection && ((MarkedObject)o).element.Type == Element.SECTION) {
                    MarkedSection mo = (MarkedSection)o;
                    Section section = (Section)(mo.element);
                    section.SetNumbers(++subsections, numbers);
                    base.Add(mo);
                    return true;
                }
                else if (element.IsNestable()) {
                    base.Add(o);
                    return true;
                }
                else {
                    throw new Exception(element.Type.ToString());
                }
            }
            catch (Exception cce) {
                throw new Exception("Insertion of illegal Element: " + cce.Message);
            }
        }
    
        /// <summary>
        /// Adds a collection of Elements
        /// to this Section.
        /// </summary>
        /// <param name="collection">a collection of Paragraphs, Lists and/or Tables</param>
        /// <returns>true if the action succeeded, false if not.</returns>
        public bool AddAll(ICollection collection) {
            foreach (object itm in collection) {
                this.Add(itm);
            }
            return true;
        }
    
        // methods that return a Section
    
        /// <summary>
        /// Creates a Section, adds it to this Section and returns it.
        /// </summary>
        /// <param name="indentation">the indentation of the new section</param>
        /// <param name="title">the title of the new section</param>
        /// <param name="numberDepth">the numberDepth of the section</param>
        /// <returns>the newly added Section</returns>
        public virtual Section AddSection(float indentation, Paragraph title, int numberDepth) {
            if (AddedCompletely) {
                throw new InvalidOperationException("This LargeElement has already been added to the Document.");
            }
            Section section = new Section(title, numberDepth);
            section.Indentation = indentation;
            Add(section);
            return section;
        }
    
        /// <summary>
        /// Creates a Section, adds it to this Section and returns it.
        /// </summary>
        /// <param name="indentation">the indentation of the new section</param>
        /// <param name="title">the title of the new section</param>
        /// <returns>the newly added Section</returns>
        public virtual Section AddSection(float indentation, Paragraph title) {
            return AddSection(indentation, title, numberDepth + 1);
        }
    
        /// <summary>
        /// Creates a Section, add it to this Section and returns it.
        /// </summary>
        /// <param name="title">the title of the new section</param>
        /// <param name="numberDepth">the numberDepth of the section</param>
        /// <returns>the newly added Section</returns>
        public virtual Section AddSection(Paragraph title, int numberDepth) {
            return AddSection(0, title, numberDepth);
        }
    
        /**
        * Adds a marked section. For use in class MarkedSection only!
        */
        public MarkedSection AddMarkedSection() {
            MarkedSection section = new MarkedSection(new Section(null, numberDepth + 1));
            Add(section);
            return section;
        }

        /// <summary>
        /// Creates a Section, adds it to this Section and returns it.
        /// </summary>
        /// <param name="title">the title of the new section</param>
        /// <returns>the newly added Section</returns>
        public virtual Section AddSection(Paragraph title) {
            return AddSection(0, title, numberDepth + 1);
        }
    
        /**
         * Adds a Section to this Section and returns it.
         *
         * @param    indentation    the indentation of the new section
         * @param    title        the title of the new section
         * @param    numberDepth    the numberDepth of the section
         */
        /// <summary>
        /// Adds a Section to this Section and returns it.
        /// </summary>
        /// <param name="indentation">the indentation of the new section</param>
        /// <param name="title">the title of the new section</param>
        /// <param name="numberDepth">the numberDepth of the section</param>
        /// <returns>the newly added Section</returns>
        public virtual Section AddSection(float indentation, string title, int numberDepth) {
            return AddSection(indentation, new Paragraph(title), numberDepth);
        }
    
        /**
         * Adds a Section to this Section and returns it.
         *
         * @param    title        the title of the new section
         * @param    numberDepth    the numberDepth of the section
         */
        /// <summary>
        /// Adds a Section to this Section and returns it.
        /// </summary>
        /// <param name="title">the title of the new section</param>
        /// <param name="numberDepth">the numberDepth of the section</param>
        /// <returns>the newly added Section</returns>
        public virtual Section AddSection(string title, int numberDepth) {
            return AddSection(new Paragraph(title), numberDepth);
        }
    
        /// <summary>
        /// Adds a Section to this Section and returns it.
        /// </summary>
        /// <param name="indentation">the indentation of the new section</param>
        /// <param name="title">the title of the new section</param>
        /// <returns>the newly added Section</returns>
        public virtual Section AddSection(float indentation, string title) {
            return AddSection(indentation, new Paragraph(title));
        }
    
        /// <summary>
        /// Adds a Section to this Section and returns it.
        /// </summary>
        /// <param name="title">the title of the new section</param>
        /// <returns>the newly added Section</returns>
        public virtual Section AddSection(string title) {
            return AddSection(new Paragraph(title));
        }
    
        // public methods
    
        /// <summary>
        /// Alters the attributes of this Section.
        /// </summary>
        /// <param name="attributes">the attributes</param>
        public void Set(Properties attributes) {
            string value;
            if ((value = attributes.Remove(ElementTags.NUMBERDEPTH)) != null) {
                NumberDepth = int.Parse(value);
            }
            if ((value = attributes.Remove(ElementTags.INDENT)) != null) {
                Indentation = float.Parse(value, System.Globalization.NumberFormatInfo.InvariantInfo);
            }
            if ((value = attributes.Remove(ElementTags.INDENTATIONLEFT)) != null) {
                IndentationLeft = float.Parse(value, System.Globalization.NumberFormatInfo.InvariantInfo);
            }
            if ((value = attributes.Remove(ElementTags.INDENTATIONRIGHT)) != null) {
                IndentationRight = float.Parse(value, System.Globalization.NumberFormatInfo.InvariantInfo);
            }
        }
    
        /// <summary>
        /// Get/set the title of this section
        /// </summary>
        /// <value>a Paragraph</value>
        public Paragraph Title {
            get {
                return ConstructTitle(title, numbers, numberDepth, numberStyle);
            }
            
            set {
                this.title = value;
            }
        }

        /**
        * Sets the style for numbering sections.
        * Possible values are NUMBERSTYLE_DOTTED: 1.2.3. (the default)
        * or NUMBERSTYLE_DOTTED_WITHOUT_FINAL_DOT: 1.2.3
        * @since    iText 2.0.8
        */
        public int NumberStyle {
            set {
                numberStyle = value;
            }
            get {
                return numberStyle;
            }
        }
        
        /**
        * Constructs a Paragraph that will be used as title for a Section or Chapter.
        * @param    title   the title of the section
        * @param    numbers a list of sectionnumbers
        * @param    numberDepth how many numbers have to be shown
        * @param    numberStyle the numbering style
        * @return   a Paragraph object
        * @since    iText 2.0.8
        */
        public static Paragraph ConstructTitle(Paragraph title, ArrayList numbers, int numberDepth, int numberStyle) {
            if (title == null) {
                return null;
            }
            int depth = Math.Min(numbers.Count, numberDepth);
            if (depth < 1) {
                return title;
            }
            StringBuilder buf = new StringBuilder(" ");
            for (int i = 0; i < depth; i++) {
                buf.Insert(0, ".");
                buf.Insert(0, (int)numbers[i]);
            }
            if (numberStyle == NUMBERSTYLE_DOTTED_WITHOUT_FINAL_DOT) {
                buf.Remove(buf.Length - 2, 1);
            }
            Paragraph result = new Paragraph(title);
            result.Insert(0, new Chunk(buf.ToString(), title.Font));
            return result;
        }

        // methods to retrieve information
    
        /// <summary>
        /// Checks if this object is a Chapter.
        /// </summary>
        /// <returns>
        /// true if it is a Chapter,
        /// false if it is a Section
        /// </returns>
        public bool IsChapter() {
            return Type == Element.CHAPTER;
        }
    
        /// <summary>
        /// Checks if this object is a Section.
        /// </summary>
        /// <returns>
        /// true if it is a Section,
        /// false if it is a Chapter.
        /// </returns>
        public bool IsSection() {
            return Type == Element.SECTION;
        }
    
        /// <summary>
        /// Get/set the numberdepth of this Section.
        /// </summary>
        /// <value>a int</value>
        public int NumberDepth {
            get {
                return numberDepth;
            }

            set {
                this.numberDepth = value;
            }
        }
    
        /// <summary>
        /// Get/set the indentation of this Section on the left side.
        /// </summary>
        /// <value>the indentation</value>
        public float IndentationLeft {
            get {
                return indentationLeft;
            }

            set {
                indentationLeft = value;
            }
        }
    
        /// <summary>
        /// Get/set the indentation of this Section on the right side.
        /// </summary>
        /// <value>the indentation</value>
        public float IndentationRight {
            get {
                return indentationRight;
            }

            set {
                indentationRight = value;
            }
        }
    
        /// <summary>
        /// Get/set the indentation of the content of this Section.
        /// </summary>
        /// <value>the indentation</value>
        public float Indentation {
            get {
                return indentation;
            }

            set {
                indentation = value;
            }
        }
    
        /// <summary>
        /// Returns the depth of this section.
        /// </summary>
        /// <value>the depth</value>
        public int Depth {
            get {
                return numbers.Count;
            }
        }
    
        /// <summary>
        /// Checks if a given tag corresponds with a title tag for this object.
        /// </summary>
        /// <param name="tag">the given tag</param>
        /// <returns>true if the tag corresponds</returns>
        public static bool IsTitle(string tag) {
            return ElementTags.TITLE.Equals(tag);
        }
    
        /// <summary>
        /// Checks if a given tag corresponds with this object.
        /// </summary>
        /// <param name="tag">the given tag</param>
        /// <returns>true if the tag corresponds</returns>
        public static bool IsTag(string tag) {
            return ElementTags.SECTION.Equals(tag);
        }
    
        /// <summary>
        /// Get/set the bookmark
        /// </summary>
        /// <value>a bool</value>
        public bool BookmarkOpen {
            get {
                return bookmarkOpen;
            }

            set {
                this.bookmarkOpen = value;
            }
        }

        /**
        * Gets the bookmark title.
        * @return the bookmark title
        */    
        public Paragraph GetBookmarkTitle() {
            if (bookmarkTitle == null)
                return Title;
            else
                return new Paragraph(bookmarkTitle);
        }
        
        /**
        * Sets the bookmark title. The bookmark title is the same as the section title but
        * can be changed with this method.
        * @param bookmarkTitle the bookmark title
        */    
        public String BookmarkTitle {
            set {
                this.bookmarkTitle = value;
            }
        }

        public override string ToString() {
            return base.ToString();
        }

        public virtual bool TriggerNewPage {
            get {
                return triggerNewPage && notAddedYet;
            }
            set {
                triggerNewPage = value;
            }
        }

        /**
        * Changes the Chapter number.
        */
        public void SetChapterNumber(int number) {
            numbers[numbers.Count - 1] = number;
            foreach (Object s in this) {
                if (s is Section) {
                    ((Section)s).SetChapterNumber(number);
                }
            }
        }

        /**
        * Indicates if this is the first time the section is added.
        * @since   iText2.0.8
        * @return  true if the section wasn't added yet
        */
        public bool NotAddedYet {
            get {
                return notAddedYet;
            }
            set {
                notAddedYet = value;
            }
        }

        /**
        * @see com.lowagie.text.LargeElement#isAddedCompletely()
        * @since   iText 2.0.8
        */
        protected bool AddedCompletely {
            get {
                return addedCompletely;
            }
            set {
                addedCompletely = value;
            }
        }
        
        /**
        * @since   iText 2.0.8
        * @see com.lowagie.text.LargeElement#flushContent()
        */
        public void FlushContent() {
            NotAddedYet = false;
            title = null;
            for (int k = 0; k < Count; ++k) {
                IElement element = (IElement)this[k];
                if (element is Section) {
                    Section s = (Section)element;
                    if (!s.ElementComplete && Count == 1) {
                        s.FlushContent();
                        return;
                    }
                    else {
                        s.AddedCompletely = true;
                    }
                }
                this.RemoveAt(k);
                --k;
            }
        }

        /**
        * @since   iText 2.0.8
        * @see com.lowagie.text.LargeElement#isComplete()
        */
        public bool ElementComplete {
            get {
                return complete;
            }
            set {
                complete = value;
            }
        }

        /**
        * Adds a new page to the section.
        * @since   2.1.1
        */
        public void NewPage() {
            this.Add(Chunk.NEXTPAGE);
        }
    }
}