631 lines
21 KiB
C#
631 lines
21 KiB
C#
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#region PDFsharp - A .NET library for processing PDF
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//
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// Authors:
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// Stefan Lange
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//
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// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Collections;
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using System.Globalization;
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using System.Text;
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using PdfSharp.Pdf.Advanced;
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using PdfSharp.Pdf.IO;
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namespace PdfSharp.Pdf
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{
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/// <summary>
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/// Represents a PDF array object.
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/// </summary>
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[DebuggerDisplay("{DebuggerDisplay}")]
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public class PdfArray : PdfObject, IEnumerable<PdfItem>
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="PdfArray"/> class.
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/// </summary>
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public PdfArray()
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{ }
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/// <summary>
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/// Initializes a new instance of the <see cref="PdfArray"/> class.
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/// </summary>
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/// <param name="document">The document.</param>
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public PdfArray(PdfDocument document)
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: base(document)
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{ }
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/// <summary>
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/// Initializes a new instance of the <see cref="PdfArray"/> class.
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/// </summary>
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/// <param name="document">The document.</param>
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/// <param name="items">The items.</param>
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public PdfArray(PdfDocument document, params PdfItem[] items)
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: base(document)
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{
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foreach (PdfItem item in items)
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Elements.Add(item);
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}
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/// <summary>
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/// Initializes a new instance from an existing dictionary. Used for object type transformation.
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/// </summary>
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/// <param name="array">The array.</param>
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protected PdfArray(PdfArray array)
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: base(array)
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{
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if (array._elements != null)
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array._elements.ChangeOwner(this);
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}
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/// <summary>
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/// Creates a copy of this array. Direct elements are deep copied.
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/// Indirect references are not modified.
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/// </summary>
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public new PdfArray Clone()
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{
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return (PdfArray)Copy();
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}
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/// <summary>
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/// Implements the copy mechanism.
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/// </summary>
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protected override object Copy()
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{
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PdfArray array = (PdfArray)base.Copy();
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if (array._elements != null)
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{
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array._elements = array._elements.Clone();
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int count = array._elements.Count;
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for (int idx = 0; idx < count; idx++)
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{
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PdfItem item = array._elements[idx];
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if (item is PdfObject)
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array._elements[idx] = item.Clone();
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}
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}
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return array;
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}
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/// <summary>
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/// Gets the collection containing the elements of this object.
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/// </summary>
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public ArrayElements Elements
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{
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get { return _elements ?? (_elements = new ArrayElements(this)); }
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}
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/// <summary>
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/// Returns an enumerator that iterates through a collection.
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/// </summary>
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public virtual IEnumerator<PdfItem> GetEnumerator()
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{
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return Elements.GetEnumerator();
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return GetEnumerator();
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}
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/// <summary>
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/// Returns a string with the content of this object in a readable form. Useful for debugging purposes only.
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/// </summary>
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public override string ToString()
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{
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StringBuilder pdf = new StringBuilder();
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pdf.Append("[ ");
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int count = Elements.Count;
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for (int idx = 0; idx < count; idx++)
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pdf.Append(Elements[idx] + " ");
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pdf.Append("]");
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return pdf.ToString();
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}
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internal override void WriteObject(PdfWriter writer)
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{
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writer.WriteBeginObject(this);
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int count = Elements.Count;
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for (int idx = 0; idx < count; idx++)
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{
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PdfItem value = Elements[idx];
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value.WriteObject(writer);
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}
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writer.WriteEndObject();
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}
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/// <summary>
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/// Represents the elements of an PdfArray.
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/// </summary>
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public sealed class ArrayElements : IList<PdfItem>, ICloneable
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{
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internal ArrayElements(PdfArray array)
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{
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_elements = new List<PdfItem>();
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_ownerArray = array;
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}
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object ICloneable.Clone()
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{
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ArrayElements elements = (ArrayElements)MemberwiseClone();
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elements._elements = new List<PdfItem>(elements._elements);
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elements._ownerArray = null;
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return elements;
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}
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/// <summary>
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/// Creates a shallow copy of this object.
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/// </summary>
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public ArrayElements Clone()
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{
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return (ArrayElements)((ICloneable)this).Clone();
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}
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/// <summary>
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/// Moves this instance to another array during object type transformation.
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/// </summary>
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internal void ChangeOwner(PdfArray array)
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{
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if (_ownerArray != null)
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{
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// ???
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}
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// Set new owner.
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_ownerArray = array;
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// Set owners elements to this.
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array._elements = this;
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}
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/// <summary>
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/// Converts the specified value to boolean.
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/// If the value does not exist, the function returns false.
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/// If the value is not convertible, the function throws an InvalidCastException.
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/// If the index is out of range, the function throws an ArgumentOutOfRangeException.
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/// </summary>
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public bool GetBoolean(int index)
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{
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if (index < 0 || index >= Count)
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throw new ArgumentOutOfRangeException("index", index, PSSR.IndexOutOfRange);
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object obj = this[index];
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if (obj == null)
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return false;
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PdfBoolean boolean = obj as PdfBoolean;
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if (boolean != null)
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return boolean.Value;
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PdfBooleanObject booleanObject = obj as PdfBooleanObject;
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if (booleanObject != null)
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return booleanObject.Value;
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throw new InvalidCastException("GetBoolean: Object is not a boolean.");
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}
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/// <summary>
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/// Converts the specified value to integer.
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/// If the value does not exist, the function returns 0.
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/// If the value is not convertible, the function throws an InvalidCastException.
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/// If the index is out of range, the function throws an ArgumentOutOfRangeException.
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/// </summary>
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public int GetInteger(int index)
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{
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if (index < 0 || index >= Count)
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throw new ArgumentOutOfRangeException("index", index, PSSR.IndexOutOfRange);
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object obj = this[index];
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if (obj == null)
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return 0;
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PdfInteger integer = obj as PdfInteger;
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if (integer != null)
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return integer.Value;
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PdfIntegerObject integerObject = obj as PdfIntegerObject;
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if (integerObject != null)
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return integerObject.Value;
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throw new InvalidCastException("GetInteger: Object is not an integer.");
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}
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/// <summary>
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/// Converts the specified value to double.
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/// If the value does not exist, the function returns 0.
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/// If the value is not convertible, the function throws an InvalidCastException.
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/// If the index is out of range, the function throws an ArgumentOutOfRangeException.
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/// </summary>
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public double GetReal(int index)
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{
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if (index < 0 || index >= Count)
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throw new ArgumentOutOfRangeException("index", index, PSSR.IndexOutOfRange);
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object obj = this[index];
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if (obj == null)
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return 0;
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PdfReal real = obj as PdfReal;
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if (real != null)
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return real.Value;
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PdfRealObject realObject = obj as PdfRealObject;
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if (realObject != null)
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return realObject.Value;
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PdfInteger integer = obj as PdfInteger;
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if (integer != null)
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return integer.Value;
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PdfIntegerObject integerObject = obj as PdfIntegerObject;
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if (integerObject != null)
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return integerObject.Value;
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throw new InvalidCastException("GetReal: Object is not a number.");
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}
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/// <summary>
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/// Converts the specified value to double?.
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/// If the value does not exist, the function returns null.
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/// If the value is not convertible, the function throws an InvalidCastException.
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/// If the index is out of range, the function throws an ArgumentOutOfRangeException.
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/// </summary>
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public double? GetNullableReal(int index)
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{
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if (index < 0 || index >= Count)
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throw new ArgumentOutOfRangeException("index", index, PSSR.IndexOutOfRange);
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object obj = this[index];
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if (obj == null)
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return null;
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PdfNull @null = obj as PdfNull;
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if (@null != null)
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return null;
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PdfNullObject nullObject = obj as PdfNullObject;
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if (nullObject != null)
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return null;
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PdfReal real = obj as PdfReal;
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if (real != null)
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return real.Value;
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PdfRealObject realObject = obj as PdfRealObject;
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if (realObject != null)
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return realObject.Value;
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PdfInteger integer = obj as PdfInteger;
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if (integer != null)
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return integer.Value;
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PdfIntegerObject integerObject = obj as PdfIntegerObject;
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if (integerObject != null)
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return integerObject.Value;
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throw new InvalidCastException("GetReal: Object is not a number.");
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}
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/// <summary>
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/// Converts the specified value to string.
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/// If the value does not exist, the function returns the empty string.
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/// If the value is not convertible, the function throws an InvalidCastException.
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/// If the index is out of range, the function throws an ArgumentOutOfRangeException.
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/// </summary>
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public string GetString(int index)
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{
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if (index < 0 || index >= Count)
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throw new ArgumentOutOfRangeException("index", index, PSSR.IndexOutOfRange);
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object obj = this[index];
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if (obj == null)
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return String.Empty;
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PdfString str = obj as PdfString;
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if (str != null)
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return str.Value;
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PdfStringObject strObject = obj as PdfStringObject;
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if (strObject != null)
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return strObject.Value;
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throw new InvalidCastException("GetString: Object is not a string.");
|
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}
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/// <summary>
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/// Converts the specified value to a name.
|
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/// If the value does not exist, the function returns the empty string.
|
||
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/// If the value is not convertible, the function throws an InvalidCastException.
|
||
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/// If the index is out of range, the function throws an ArgumentOutOfRangeException.
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||
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/// </summary>
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||
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public string GetName(int index)
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{
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if (index < 0 || index >= Count)
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throw new ArgumentOutOfRangeException("index", index, PSSR.IndexOutOfRange);
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||
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||
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object obj = this[index];
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||
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if (obj == null)
|
||
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return String.Empty;
|
||
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PdfName name = obj as PdfName;
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if (name != null)
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return name.Value;
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PdfNameObject nameObject = obj as PdfNameObject;
|
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if (nameObject != null)
|
||
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return nameObject.Value;
|
||
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throw new InvalidCastException("GetName: Object is not a name.");
|
||
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}
|
||
|
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|
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/// <summary>
|
||
|
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/// Returns the indirect object if the value at the specified index is a PdfReference.
|
||
|
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/// </summary>
|
||
|
|
[Obsolete("Use GetObject, GetDictionary, GetArray, or GetReference")]
|
||
|
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public PdfObject GetIndirectObject(int index)
|
||
|
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{
|
||
|
|
if (index < 0 || index >= Count)
|
||
|
|
throw new ArgumentOutOfRangeException("index", index, PSSR.IndexOutOfRange);
|
||
|
|
|
||
|
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PdfReference reference = this[index] as PdfReference;
|
||
|
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if (reference != null)
|
||
|
|
return reference.Value;
|
||
|
|
|
||
|
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return null;
|
||
|
|
}
|
||
|
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|
||
|
|
/// <summary>
|
||
|
|
/// Gets the PdfObject with the specified index, or null, if no such object exists. If the index refers to
|
||
|
|
/// a reference, the referenced PdfObject is returned.
|
||
|
|
/// </summary>
|
||
|
|
public PdfObject GetObject(int index)
|
||
|
|
{
|
||
|
|
if (index < 0 || index >= Count)
|
||
|
|
throw new ArgumentOutOfRangeException("index", index, PSSR.IndexOutOfRange);
|
||
|
|
|
||
|
|
PdfItem item = this[index];
|
||
|
|
PdfReference reference = item as PdfReference;
|
||
|
|
if (reference != null)
|
||
|
|
return reference.Value;
|
||
|
|
|
||
|
|
return item as PdfObject;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets the PdfArray with the specified index, or null, if no such object exists. If the index refers to
|
||
|
|
/// a reference, the referenced PdfArray is returned.
|
||
|
|
/// </summary>
|
||
|
|
public PdfDictionary GetDictionary(int index)
|
||
|
|
{
|
||
|
|
return GetObject(index) as PdfDictionary;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets the PdfArray with the specified index, or null, if no such object exists. If the index refers to
|
||
|
|
/// a reference, the referenced PdfArray is returned.
|
||
|
|
/// </summary>
|
||
|
|
public PdfArray GetArray(int index)
|
||
|
|
{
|
||
|
|
return GetObject(index) as PdfArray;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets the PdfReference with the specified index, or null, if no such object exists.
|
||
|
|
/// </summary>
|
||
|
|
public PdfReference GetReference(int index)
|
||
|
|
{
|
||
|
|
PdfItem item = this[index];
|
||
|
|
return item as PdfReference;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets all items of this array.
|
||
|
|
/// </summary>
|
||
|
|
public PdfItem[] Items
|
||
|
|
{
|
||
|
|
get { return _elements.ToArray(); }
|
||
|
|
}
|
||
|
|
|
||
|
|
#region IList Members
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns false.
|
||
|
|
/// </summary>
|
||
|
|
public bool IsReadOnly
|
||
|
|
{
|
||
|
|
get { return false; }
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets or sets an item at the specified index.
|
||
|
|
/// </summary>
|
||
|
|
/// <value></value>
|
||
|
|
public PdfItem this[int index]
|
||
|
|
{
|
||
|
|
get { return _elements[index]; }
|
||
|
|
set
|
||
|
|
{
|
||
|
|
if (value == null)
|
||
|
|
throw new ArgumentNullException("value");
|
||
|
|
_elements[index] = value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Removes the item at the specified index.
|
||
|
|
/// </summary>
|
||
|
|
public void RemoveAt(int index)
|
||
|
|
{
|
||
|
|
_elements.RemoveAt(index);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Removes the first occurrence of a specific object from the array/>.
|
||
|
|
/// </summary>
|
||
|
|
public bool Remove(PdfItem item)
|
||
|
|
{
|
||
|
|
return _elements.Remove(item);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Inserts the item the specified index.
|
||
|
|
/// </summary>
|
||
|
|
public void Insert(int index, PdfItem value)
|
||
|
|
{
|
||
|
|
_elements.Insert(index, value);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Determines whether the specified value is in the array.
|
||
|
|
/// </summary>
|
||
|
|
public bool Contains(PdfItem value)
|
||
|
|
{
|
||
|
|
return _elements.Contains(value);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Removes all items from the array.
|
||
|
|
/// </summary>
|
||
|
|
public void Clear()
|
||
|
|
{
|
||
|
|
_elements.Clear();
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets the index of the specified item.
|
||
|
|
/// </summary>
|
||
|
|
public int IndexOf(PdfItem value)
|
||
|
|
{
|
||
|
|
return _elements.IndexOf(value);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Appends the specified object to the array.
|
||
|
|
/// </summary>
|
||
|
|
public void Add(PdfItem value)
|
||
|
|
{
|
||
|
|
// TODO: ???
|
||
|
|
//Debug.Assert((value is PdfObject && ((PdfObject)value).Reference == null) | !(value is PdfObject),
|
||
|
|
// "You try to set an indirect object directly into an array.");
|
||
|
|
|
||
|
|
PdfObject obj = value as PdfObject;
|
||
|
|
if (obj != null && obj.IsIndirect)
|
||
|
|
_elements.Add(obj.Reference);
|
||
|
|
else
|
||
|
|
_elements.Add(value);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns false.
|
||
|
|
/// </summary>
|
||
|
|
public bool IsFixedSize
|
||
|
|
{
|
||
|
|
get { return false; }
|
||
|
|
}
|
||
|
|
|
||
|
|
#endregion
|
||
|
|
|
||
|
|
#region ICollection Members
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns false.
|
||
|
|
/// </summary>
|
||
|
|
public bool IsSynchronized
|
||
|
|
{
|
||
|
|
get { return false; }
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets the number of elements in the array.
|
||
|
|
/// </summary>
|
||
|
|
public int Count
|
||
|
|
{
|
||
|
|
get { return _elements.Count; }
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Copies the elements of the array to the specified array.
|
||
|
|
/// </summary>
|
||
|
|
public void CopyTo(PdfItem[] array, int index)
|
||
|
|
{
|
||
|
|
_elements.CopyTo(array, index);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// The current implementation return null.
|
||
|
|
/// </summary>
|
||
|
|
public object SyncRoot
|
||
|
|
{
|
||
|
|
get { return null; }
|
||
|
|
}
|
||
|
|
|
||
|
|
#endregion
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns an enumerator that iterates through the array.
|
||
|
|
/// </summary>
|
||
|
|
public IEnumerator<PdfItem> GetEnumerator()
|
||
|
|
{
|
||
|
|
return _elements.GetEnumerator();
|
||
|
|
}
|
||
|
|
|
||
|
|
IEnumerator IEnumerable.GetEnumerator()
|
||
|
|
{
|
||
|
|
return _elements.GetEnumerator();
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// The elements of the array.
|
||
|
|
/// </summary>
|
||
|
|
List<PdfItem> _elements;
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// The array this objects belongs to.
|
||
|
|
/// </summary>
|
||
|
|
PdfArray _ownerArray;
|
||
|
|
}
|
||
|
|
|
||
|
|
ArrayElements _elements;
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Gets the DebuggerDisplayAttribute text.
|
||
|
|
/// </summary>
|
||
|
|
// ReSharper disable UnusedMember.Local
|
||
|
|
string DebuggerDisplay
|
||
|
|
// ReSharper restore UnusedMember.Local
|
||
|
|
{
|
||
|
|
get
|
||
|
|
{
|
||
|
|
#if true
|
||
|
|
return String.Format(CultureInfo.InvariantCulture, "array({0},[{1}])", ObjectID.DebuggerDisplay, _elements == null ? 0 : _elements.Count);
|
||
|
|
#else
|
||
|
|
return String.Format(CultureInfo.InvariantCulture, "array({0},[{1}])", ObjectID.DebuggerDisplay, _elements == null ? 0 : _elements.Count);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|