using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using FastReport.Design;
using FastReport.Format;

namespace FastReport
{
    internal class SelectedTextBaseObjects
    {
        private List<TextObjectBase> list;
        private Designer designer;

        public TextObjectBase First
        {
            get { return list.Count > 0 ? list[0] : null; }
        }

        public int Count
        {
            get { return list.Count; }
        }

        public bool Enabled
        {
            get
            {
                return Count > 1 || (Count == 1 && CanModify(First));
            }
        }

        private List<TextObjectBase> ModifyList
        {
            get { return list.FindAll(CanModify); }
        }

        private bool CanModify(TextObjectBase c)
        {
            return !c.HasRestriction(Restrictions.DontModify);
        }

        public void SetAllowExpressions(bool value)
        {
            foreach (TextObjectBase text in ModifyList)
            {
                text.AllowExpressions = value;
            }
        }

        public void SetFormat(FormatCollection value)
        {
            foreach (TextObjectBase text in ModifyList)
            {
                text.Formats.Assign(value);
            }
        }

        public void SetHideZeros(bool value)
        {
            foreach (TextObjectBase text in ModifyList)
            {
                text.HideZeros = value;
            }
        }

        public void Update()
        {
            list.Clear();
            if (designer.SelectedObjects != null)
            {
                foreach (Base c in designer.SelectedObjects)
                {
                    if (c is TextObjectBase)
                        list.Add(c as TextObjectBase);
                }
            }
        }

        public SelectedTextBaseObjects(Designer designer)
        {
            this.designer = designer;
            list = new List<TextObjectBase>();
        }
    }
}