#region MigraDoc - Creating Documents on the Fly
//
// Authors:
//   Stefan Lange
//   Klaus Potzesny
//   David Stephensen
//
// Copyright (c) 2001-2017 empira Software GmbH, Cologne Area (Germany)
//
// http://www.pdfsharp.com
// http://www.migradoc.com
// http://sourceforge.net/projects/pdfsharp
//
// 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.
#endregion

using System;
using MigraDoc.DocumentObjectModel.publics;
using MigraDoc.DocumentObjectModel.Visitors;

namespace MigraDoc.DocumentObjectModel.Tables
{
    /// <summary>
    /// Represents the collection of all rows of a table.
    /// </summary>
    public class Rows : DocumentObjectCollection, IVisitable
    {
        /// <summary>
        /// Initializes a new instance of the Rows class.
        /// </summary>
        public Rows()
        { }

        /// <summary>
        /// Initializes a new instance of the Rows class with the specified parent.
        /// </summary>
        public Rows(DocumentObject parent) : base(parent) { }

        #region Methods
        /// <summary>
        /// Creates a deep copy of this object.
        /// </summary>
        public new Rows Clone()
        {
            return (Rows)base.DeepCopy();
        }

        /// <summary>
        /// Adds a new row to the rows collection. Allowed only if at least one column exists.
        /// </summary>
        public Row AddRow()
        {
            if (Table.Columns.Count == 0)
                throw new InvalidOperationException("Cannot add row, because no columns exists.");

            Row row = new Row();
            Add(row);
            return row;
        }
        #endregion

        #region Properties
        /// <summary>
        /// Gets the table the rows collection belongs to.
        /// </summary>
        public Table Table
        {
            get { return _parent as Table; }
        }

        /// <summary>
        /// Gets a row by its index.
        /// </summary>
        public new Row this[int index]
        {
            get { return base[index] as Row; }
        }

        /// <summary>
        /// Gets or sets the row alignment of the table.
        /// </summary>
        public RowAlignment Alignment
        {
            get { return (RowAlignment)_alignment.Value; }
            set { _alignment.Value = (int)value; }
        }
        [DV(Type = typeof(RowAlignment))]
        public NEnum _alignment = NEnum.NullValue(typeof(RowAlignment));

        /// <summary>
        /// Gets or sets the left indent of the table. If row alignment is not Left, 
        /// the value is ignored.
        /// </summary>
        public Unit LeftIndent
        {
            get { return _leftIndent; }
            set { _leftIndent = value; }
        }
        [DV]
        public Unit _leftIndent = Unit.NullValue;

        /// <summary>
        /// Gets or sets the default vertical alignment for all rows.
        /// </summary>
        public VerticalAlignment VerticalAlignment
        {
            get { return (VerticalAlignment)_verticalAlignment.Value; }
            set { _verticalAlignment.Value = (int)value; }
        }
        [DV(Type = typeof(VerticalAlignment))]
        public NEnum _verticalAlignment = NEnum.NullValue(typeof(VerticalAlignment));

        /// <summary>
        /// Gets or sets the height of the rows.
        /// </summary>
        public Unit Height
        {
            get { return _height; }
            set { _height = value; }
        }
        [DV]
        public Unit _height = Unit.NullValue;

        /// <summary>
        /// Gets or sets the rule which is used to determine the height of the rows.
        /// </summary>
        public RowHeightRule HeightRule
        {
            get { return (RowHeightRule)_heightRule.Value; }
            set { _heightRule.Value = (int)value; }
        }
        [DV(Type = typeof(RowHeightRule))]
        public NEnum _heightRule = NEnum.NullValue(typeof(RowHeightRule));

        /// <summary>
        /// Gets or sets a comment associated with this object.
        /// </summary>
        public string Comment
        {
            get { return _comment.Value; }
            set { _comment.Value = value; }
        }
        [DV]
        public NString _comment = NString.NullValue;
        #endregion

        #region public
        /// <summary>
        /// Converts Rows into DDL.
        /// </summary>
        public override void Serialize(Serializer serializer)
        {
            serializer.WriteComment(_comment.Value);
            serializer.WriteLine("\\rows");

            int pos = serializer.BeginAttributes();

            if (!_alignment.IsNull)
                serializer.WriteSimpleAttribute("Alignment", Alignment);

            if (!_height.IsNull)
                serializer.WriteSimpleAttribute("Height", Height);

            if (!_heightRule.IsNull)
                serializer.WriteSimpleAttribute("HeightRule", HeightRule);

            if (!_leftIndent.IsNull)
                serializer.WriteSimpleAttribute("LeftIndent", LeftIndent);

            if (!_verticalAlignment.IsNull)
                serializer.WriteSimpleAttribute("VerticalAlignment", VerticalAlignment);

            serializer.EndAttributes(pos);

            serializer.BeginContent();
            int rows = Count;
            if (rows > 0)
            {
                for (int row = 0; row < rows; row++)
                    this[row].Serialize(serializer);
            }
            else
                serializer.WriteComment("Invalid - no rows defined. Table will not render.");
            serializer.EndContent();
        }

        /// <summary>
        /// Allows the visitor object to visit the document object and its child objects.
        /// </summary>
        void IVisitable.AcceptVisitor(DocumentObjectVisitor visitor, bool visitChildren)
        {
            visitor.VisitRows(this);

            foreach (Row row in this)
                ((IVisitable)row).AcceptVisitor(visitor, visitChildren);
        }

        /// <summary>
        /// Returns the meta object of this instance.
        /// </summary>
        public override Meta Meta
        {
            get { return _meta ?? (_meta = new Meta(typeof(Rows))); }
        }
        static Meta _meta;
        #endregion
    }
}