500 lines
16 KiB
C#
500 lines
16 KiB
C#
#region PDFsharp - A .NET library for processing PDF
|
||
//
|
||
// Authors:
|
||
// Stefan Lange
|
||
//
|
||
// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
|
||
//
|
||
// http://www.pdfsharp.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 System.Diagnostics;
|
||
using System.Globalization;
|
||
#if GDI
|
||
using System.Drawing;
|
||
#endif
|
||
#if WPF
|
||
using System.Windows.Media;
|
||
#endif
|
||
using PdfSharp.Drawing;
|
||
using PdfSharp.Pdf.Advanced;
|
||
using PdfSharp.Pdf.IO;
|
||
using PdfSharp.Pdf.Internal;
|
||
|
||
namespace PdfSharp.Pdf
|
||
{
|
||
/// <summary>
|
||
/// Represents a PDF rectangle value, that is internally an array with 4 real values.
|
||
/// </summary>
|
||
[DebuggerDisplay("{DebuggerDisplay}")]
|
||
public sealed class PdfRectangle : PdfItem
|
||
{
|
||
// This class must behave like a value type. Therefore it cannot be changed (like System.String).
|
||
|
||
/// <summary>
|
||
/// Initializes a new instance of the PdfRectangle class.
|
||
/// </summary>
|
||
public PdfRectangle()
|
||
{ }
|
||
|
||
/// <summary>
|
||
/// Initializes a new instance of the PdfRectangle class with two points specifying
|
||
/// two diagonally opposite corners. Notice that in contrast to GDI+ convention the
|
||
/// 3rd and the 4th parameter specify a point and not a width. This is so much confusing
|
||
/// that this function is for internal use only.
|
||
/// </summary>
|
||
internal PdfRectangle(double x1, double y1, double x2, double y2)
|
||
{
|
||
_x1 = x1;
|
||
_y1 = y1;
|
||
_x2 = x2;
|
||
_y2 = y2;
|
||
}
|
||
|
||
#if GDI
|
||
/// <summary>
|
||
/// Initializes a new instance of the PdfRectangle class with two points specifying
|
||
/// two diagonally opposite corners.
|
||
/// </summary>
|
||
public PdfRectangle(PointF pt1, PointF pt2)
|
||
{
|
||
_x1 = pt1.X;
|
||
_y1 = pt1.Y;
|
||
_x2 = pt2.X;
|
||
_y2 = pt2.Y;
|
||
}
|
||
#endif
|
||
|
||
/// <summary>
|
||
/// Initializes a new instance of the PdfRectangle class with two points specifying
|
||
/// two diagonally opposite corners.
|
||
/// </summary>
|
||
public PdfRectangle(XPoint pt1, XPoint pt2)
|
||
{
|
||
_x1 = pt1.X;
|
||
_y1 = pt1.Y;
|
||
_x2 = pt2.X;
|
||
_y2 = pt2.Y;
|
||
}
|
||
|
||
#if GDI
|
||
/// <summary>
|
||
/// Initializes a new instance of the PdfRectangle class with the specified location and size.
|
||
/// </summary>
|
||
public PdfRectangle(PointF pt, SizeF size)
|
||
{
|
||
_x1 = pt.X;
|
||
_y1 = pt.Y;
|
||
_x2 = pt.X + size.Width;
|
||
_y2 = pt.Y + size.Height;
|
||
}
|
||
#endif
|
||
|
||
/// <summary>
|
||
/// Initializes a new instance of the PdfRectangle class with the specified location and size.
|
||
/// </summary>
|
||
public PdfRectangle(XPoint pt, XSize size)
|
||
{
|
||
_x1 = pt.X;
|
||
_y1 = pt.Y;
|
||
_x2 = pt.X + size.Width;
|
||
_y2 = pt.Y + size.Height;
|
||
}
|
||
|
||
/// <summary>
|
||
/// Initializes a new instance of the PdfRectangle class with the specified XRect.
|
||
/// </summary>
|
||
public PdfRectangle(XRect rect)
|
||
{
|
||
_x1 = rect.X;
|
||
_y1 = rect.Y;
|
||
_x2 = rect.X + rect.Width;
|
||
_y2 = rect.Y + rect.Height;
|
||
}
|
||
|
||
/// <summary>
|
||
/// Initializes a new instance of the PdfRectangle class with the specified PdfArray.
|
||
/// </summary>
|
||
internal PdfRectangle(PdfItem item)
|
||
{
|
||
if (item == null || item is PdfNull)
|
||
return;
|
||
|
||
if (item is PdfReference)
|
||
item = ((PdfReference)item).Value;
|
||
|
||
PdfArray array = item as PdfArray;
|
||
if (array == null)
|
||
throw new InvalidOperationException(PSSR.UnexpectedTokenInPdfFile);
|
||
|
||
_x1 = array.Elements.GetReal(0);
|
||
_y1 = array.Elements.GetReal(1);
|
||
_x2 = array.Elements.GetReal(2);
|
||
_y2 = array.Elements.GetReal(3);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Clones this instance.
|
||
/// </summary>
|
||
public new PdfRectangle Clone()
|
||
{
|
||
return (PdfRectangle)Copy();
|
||
}
|
||
|
||
/// <summary>
|
||
/// Implements cloning this instance.
|
||
/// </summary>
|
||
protected override object Copy()
|
||
{
|
||
PdfRectangle rect = (PdfRectangle)base.Copy();
|
||
return rect;
|
||
}
|
||
|
||
/// <summary>
|
||
/// Tests whether all coordinate are zero.
|
||
/// </summary>
|
||
public bool IsEmpty
|
||
{
|
||
// ReSharper disable CompareOfFloatsByEqualityOperator
|
||
get { return _x1 == 0 && _y1 == 0 && _x2 == 0 && _y2 == 0; }
|
||
// ReSharper restore CompareOfFloatsByEqualityOperator
|
||
}
|
||
|
||
/// <summary>
|
||
/// Tests whether the specified object is a PdfRectangle and has equal coordinates.
|
||
/// </summary>
|
||
public override bool Equals(object obj)
|
||
{
|
||
// ReSharper disable CompareOfFloatsByEqualityOperator
|
||
PdfRectangle rectangle = obj as PdfRectangle;
|
||
if (rectangle != null)
|
||
{
|
||
PdfRectangle rect = rectangle;
|
||
return rect._x1 == _x1 && rect._y1 == _y1 && rect._x2 == _x2 && rect._y2 == _y2;
|
||
}
|
||
return false;
|
||
// ReSharper restore CompareOfFloatsByEqualityOperator
|
||
}
|
||
|
||
/// <summary>
|
||
/// Serves as a hash function for a particular type.
|
||
/// </summary>
|
||
public override int GetHashCode()
|
||
{
|
||
// This code is from System.Drawing...
|
||
return (int)(((((uint)_x1) ^ ((((uint)_y1) << 13) |
|
||
(((uint)_y1) >> 0x13))) ^ ((((uint)_x2) << 0x1a) |
|
||
(((uint)_x2) >> 6))) ^ ((((uint)_y2) << 7) |
|
||
(((uint)_y2) >> 0x19)));
|
||
}
|
||
|
||
/// <summary>
|
||
/// Tests whether two structures have equal coordinates.
|
||
/// </summary>
|
||
public static bool operator ==(PdfRectangle left, PdfRectangle right)
|
||
{
|
||
// ReSharper disable CompareOfFloatsByEqualityOperator
|
||
// use: if (Object.ReferenceEquals(left, null))
|
||
if ((object)left != null)
|
||
{
|
||
if ((object)right != null)
|
||
return left._x1 == right._x1 && left._y1 == right._y1 && left._x2 == right._x2 && left._y2 == right._y2;
|
||
return false;
|
||
}
|
||
return (object)right == null;
|
||
// ReSharper restore CompareOfFloatsByEqualityOperator
|
||
}
|
||
|
||
/// <summary>
|
||
/// Tests whether two structures differ in one or more coordinates.
|
||
/// </summary>
|
||
public static bool operator !=(PdfRectangle left, PdfRectangle right)
|
||
{
|
||
return !(left == right);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Gets or sets the x-coordinate of the first corner of this PdfRectangle.
|
||
/// </summary>
|
||
public double X1
|
||
{
|
||
get { return _x1; }
|
||
}
|
||
readonly double _x1;
|
||
|
||
/// <summary>
|
||
/// Gets or sets the y-coordinate of the first corner of this PdfRectangle.
|
||
/// </summary>
|
||
public double Y1
|
||
{
|
||
get { return _y1; }
|
||
}
|
||
readonly double _y1;
|
||
|
||
/// <summary>
|
||
/// Gets or sets the x-coordinate of the second corner of this PdfRectangle.
|
||
/// </summary>
|
||
public double X2
|
||
{
|
||
get { return _x2; }
|
||
}
|
||
readonly double _x2;
|
||
|
||
/// <summary>
|
||
/// Gets or sets the y-coordinate of the second corner of this PdfRectangle.
|
||
/// </summary>
|
||
public double Y2
|
||
{
|
||
get { return _y2; }
|
||
}
|
||
readonly double _y2;
|
||
|
||
/// <summary>
|
||
/// Gets X2 - X1.
|
||
/// </summary>
|
||
public double Width
|
||
{
|
||
get { return _x2 - _x1; }
|
||
}
|
||
|
||
/// <summary>
|
||
/// Gets Y2 - Y1.
|
||
/// </summary>
|
||
public double Height
|
||
{
|
||
get { return _y2 - _y1; }
|
||
}
|
||
|
||
/// <summary>
|
||
/// Gets or sets the coordinates of the first point of this PdfRectangle.
|
||
/// </summary>
|
||
public XPoint Location
|
||
{
|
||
get { return new XPoint(_x1, _y1); }
|
||
}
|
||
|
||
/// <summary>
|
||
/// Gets or sets the size of this PdfRectangle.
|
||
/// </summary>
|
||
public XSize Size
|
||
{
|
||
get { return new XSize(_x2 - _x1, _y2 - _y1); }
|
||
}
|
||
|
||
#if GDI
|
||
/// <summary>
|
||
/// Determines if the specified point is contained within this PdfRectangle.
|
||
/// </summary>
|
||
public bool Contains(PointF pt)
|
||
{
|
||
return Contains(pt.X, pt.Y);
|
||
}
|
||
#endif
|
||
|
||
/// <summary>
|
||
/// Determines if the specified point is contained within this PdfRectangle.
|
||
/// </summary>
|
||
public bool Contains(XPoint pt)
|
||
{
|
||
return Contains(pt.X, pt.Y);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Determines if the specified point is contained within this PdfRectangle.
|
||
/// </summary>
|
||
public bool Contains(double x, double y)
|
||
{
|
||
// Treat rectangle inclusive/inclusive.
|
||
return _x1 <= x && x <= _x2 && _y1 <= y && y <= _y2;
|
||
}
|
||
|
||
#if GDI
|
||
/// <summary>
|
||
/// Determines if the rectangular region represented by rect is entirely contained within this PdfRectangle.
|
||
/// </summary>
|
||
public bool Contains(RectangleF rect)
|
||
{
|
||
return _x1 <= rect.X && (rect.X + rect.Width) <= _x2 &&
|
||
_y1 <= rect.Y && (rect.Y + rect.Height) <= _y2;
|
||
}
|
||
#endif
|
||
|
||
/// <summary>
|
||
/// Determines if the rectangular region represented by rect is entirely contained within this PdfRectangle.
|
||
/// </summary>
|
||
public bool Contains(XRect rect)
|
||
{
|
||
return _x1 <= rect.X && (rect.X + rect.Width) <= _x2 &&
|
||
_y1 <= rect.Y && (rect.Y + rect.Height) <= _y2;
|
||
}
|
||
|
||
/// <summary>
|
||
/// Determines if the rectangular region represented by rect is entirely contained within this PdfRectangle.
|
||
/// </summary>
|
||
public bool Contains(PdfRectangle rect)
|
||
{
|
||
return _x1 <= rect._x1 && rect._x2 <= _x2 &&
|
||
_y1 <= rect._y1 && rect._y2 <= _y2;
|
||
}
|
||
|
||
/// <summary>
|
||
/// Returns the rectangle as an XRect object.
|
||
/// </summary>
|
||
public XRect ToXRect()
|
||
{
|
||
return new XRect(_x1, _y1, Width, Height);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Returns the rectangle as a string in the form <20>[x1 y1 x2 y2]<5D>.
|
||
/// </summary>
|
||
public override string ToString()
|
||
{
|
||
const string format = Config.SignificantFigures3;
|
||
return PdfEncoders.Format("[{0:" + format + "} {1:" + format + "} {2:" + format + "} {3:" + format + "}]", _x1, _y1, _x2, _y2);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Writes the rectangle.
|
||
/// </summary>
|
||
internal override void WriteObject(PdfWriter writer)
|
||
{
|
||
writer.Write(this);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Gets the DebuggerDisplayAttribute text.
|
||
/// </summary>
|
||
// ReSharper disable UnusedMember.Local
|
||
string DebuggerDisplay
|
||
// ReSharper restore UnusedMember.Local
|
||
{
|
||
get
|
||
{
|
||
const string format = Config.SignificantFigures10;
|
||
return String.Format(CultureInfo.InvariantCulture,
|
||
"X1={0:" + format + "}, Y1={1:" + format + "}, X2={2:" + format + "}, Y2={3:" + format + "}", _x1, _y1, _x2, _y2);
|
||
}
|
||
}
|
||
|
||
#if false // This object is considered as immutable.
|
||
// /// <summary>
|
||
// /// Adjusts the location of this PdfRectangle by the specified amount.
|
||
// /// </summary>
|
||
// public void Offset(PointF pos)
|
||
// {
|
||
// Offset(pos.X, pos.Y);
|
||
// }
|
||
//
|
||
// /// <summary>
|
||
// /// Adjusts the location of this PdfRectangle by the specified amount.
|
||
// /// </summary>
|
||
// public void Offset(double x, double y)
|
||
// {
|
||
// _x1 += x;
|
||
// _y1 += y;
|
||
// _x2 += x;
|
||
// _y2 += y;
|
||
// }
|
||
//
|
||
// /// <summary>
|
||
// /// Inflates this PdfRectangle by the specified amount.
|
||
// /// </summary>
|
||
// public void Inflate(double x, double y)
|
||
// {
|
||
// _x1 -= x;
|
||
// _y1 -= y;
|
||
// _x2 += x;
|
||
// _y2 += y;
|
||
// }
|
||
//
|
||
// /// <summary>
|
||
// /// Inflates this PdfRectangle by the specified amount.
|
||
// /// </summary>
|
||
// public void Inflate(SizeF size)
|
||
// {
|
||
// Inflate(size.Width, size.Height);
|
||
// }
|
||
//
|
||
// /// <summary>
|
||
// /// Creates and returns an inflated copy of the specified PdfRectangle.
|
||
// /// </summary>
|
||
// public static PdfRectangle Inflate(PdfRectangle rect, double x, double y)
|
||
// {
|
||
// rect.Inflate(x, y);
|
||
// return rect;
|
||
// }
|
||
//
|
||
// /// <summary>
|
||
// /// Replaces this PdfRectangle with the intersection of itself and the specified PdfRectangle.
|
||
// /// </summary>
|
||
// public void Intersect(PdfRectangle rect)
|
||
// {
|
||
// PdfRectangle rect2 = PdfRectangle.Intersect(rect, this);
|
||
// _x1 = rect2.x1;
|
||
// _y1 = rect2.y1;
|
||
// _x2 = rect2.x2;
|
||
// _y2 = rect2.y2;
|
||
// }
|
||
//
|
||
// /// <summary>
|
||
// /// Returns a PdfRectangle that represents the intersection of two rectangles. If there is no intersection,
|
||
// /// an empty PdfRectangle is returned.
|
||
// /// </summary>
|
||
// public static PdfRectangle Intersect(PdfRectangle rect1, PdfRectangle rect2)
|
||
// {
|
||
// double xx1 = Math.Max(rect1.x1, rect2.x1);
|
||
// double xx2 = Math.Min(rect1.x2, rect2.x2);
|
||
// double yy1 = Math.Max(rect1.y1, rect2.y1);
|
||
// double yy2 = Math.Min(rect1.y2, rect2.y2);
|
||
// if (xx2 >= xx1 && yy2 >= yy1)
|
||
// return new PdfRectangle(xx1, yy1, xx2, yy2);
|
||
// return PdfRectangle.Empty;
|
||
// }
|
||
//
|
||
// /// <summary>
|
||
// /// Determines if this rectangle intersects with the specified PdfRectangle.
|
||
// /// </summary>
|
||
// public bool IntersectsWith(PdfRectangle rect)
|
||
// {
|
||
// return rect.x1 < _x2 && _x1 < rect.x2 && rect.y1 < _y2 && _y1 < rect.y2;
|
||
// }
|
||
//
|
||
// /// <summary>
|
||
// /// Creates the smallest rectangle that can contain both of two specified rectangles.
|
||
// /// </summary>
|
||
// public static PdfRectangle Union(PdfRectangle rect1, PdfRectangle rect2)
|
||
// {
|
||
// return new PdfRectangle(
|
||
// Math.Min(rect1.x1, rect2.x1), Math.Max(rect1.x2, rect2.x2),
|
||
// Math.Min(rect1.y1, rect2.y1), Math.Max(rect1.y2, rect2.y2));
|
||
// }
|
||
#endif
|
||
|
||
/// <summary>
|
||
/// Represents an empty PdfRectangle.
|
||
/// </summary>
|
||
public static readonly PdfRectangle Empty = new PdfRectangle();
|
||
}
|
||
}
|