767 lines
22 KiB
C#
767 lines
22 KiB
C#
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#region MigraDoc - Creating Documents on the Fly
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//
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// Authors:
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// Stefan Lange
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// Klaus Potzesny
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// David Stephensen
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//
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// Copyright (c) 2001-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://www.migradoc.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.Diagnostics;
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using MigraDoc.DocumentObjectModel.publics;
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namespace MigraDoc.DocumentObjectModel
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{
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/// <summary>
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/// A Unit consists of a numerical value and a UnitType like Centimeter, Millimeter, or Inch.
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/// Several conversions between different measures are supported.
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/// </summary>
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public struct Unit : IFormattable, INullableValue
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{
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/// <summary>
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/// Initializes a new instance of the Unit class with type set to point.
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/// </summary>
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public Unit(double point)
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{
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_value = (float)point;
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_type = UnitType.Point;
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_initialized = true;
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}
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/// <summary>
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/// Initializes a new instance of the Unit class.
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/// Throws System.ArgumentException if <code>type</code> is invalid.
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/// </summary>
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public Unit(double value, UnitType type)
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{
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if (!Enum.IsDefined(typeof(UnitType), type))
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throw new /*InvalidEnum*/ArgumentException(DomSR.InvalidEnumValue(type), "type");
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_value = (float)value;
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_type = type;
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_initialized = true;
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}
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/// <summary>
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/// Determines whether this instance is empty.
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/// </summary>
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public bool IsEmpty
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{
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get { return IsNull; }
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}
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/// <summary>
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/// Gets the value of the unit.
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/// </summary>
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object INullableValue.GetValue()
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{
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return this;
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}
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/// <summary>
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/// Sets the unit to the given value.
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/// </summary>
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void INullableValue.SetValue(object value)
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{
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if (value == null)
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throw new ArgumentNullException("value");
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if (value is Unit)
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this = (Unit)value;
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else
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this = value.ToString();
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}
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/// <summary>
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/// Resets this instance,
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/// i.e. IsNull() will return true afterwards.
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/// </summary>
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void INullableValue.SetNull()
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{
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_value = 0;
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_type = UnitType.Point;
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_initialized = false;
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}
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// Explicit interface implementations cannot contain access specifiers, i.e. they are accessible by a
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// cast operator only, e.g. ((IDomValue)obj).IsNull.
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// Therefore the second IsNull-Property is used as a handy shortcut.
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/// <summary>
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/// Determines whether this instance is null (not set).
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/// </summary>
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bool INullableValue.IsNull
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{
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get { return IsNull; }
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}
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/// <summary>
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/// Determines whether this instance is null (not set).
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/// </summary>
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public bool IsNull
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{
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get { return !_initialized; }
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}
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#region Properties
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/// <summary>
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/// Gets or sets the raw value of the object without any conversion.
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/// To determine the UnitType use property <code>Type</code>.
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/// </summary>
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public double Value
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{
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get { return (IsNull ? 0 : _value); }
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set
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{
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_value = (float)value;
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_initialized = true;
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}
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}
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/// <summary>
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/// Gets the UnitType of the object.
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/// </summary>
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public UnitType Type
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{
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get { return _type; }
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set { _type = value; }
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}
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/// <summary>
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/// Gets or sets the value in point.
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/// </summary>
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public double Point
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{
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get
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{
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if (IsNull)
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return 0;
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switch (_type)
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{
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case UnitType.Centimeter:
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return _value * 72 / 2.54;
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case UnitType.Inch:
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return _value * 72;
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case UnitType.Millimeter:
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return _value * 72 / 25.4;
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case UnitType.Pica:
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return _value * 12;
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case UnitType.Point:
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return _value;
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default:
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Debug.Assert(false, "Missing unit type.");
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return 0;
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}
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}
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set
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{
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_value = (float)value;
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_type = UnitType.Point;
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_initialized = true;
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}
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}
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//[Obsolete("Use Point")]
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//public double Pt
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//{
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// get { return Point; }
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// set { Point = value; }
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//}
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/// <summary>
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/// Gets or sets the value in centimeter.
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/// </summary>
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public double Centimeter
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{
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get
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{
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if (IsNull)
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return 0;
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switch (_type)
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{
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case UnitType.Centimeter:
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return _value;
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case UnitType.Inch:
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return _value * 2.54;
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case UnitType.Millimeter:
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return _value / 10;
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case UnitType.Pica:
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return _value * 12 * 2.54 / 72;
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case UnitType.Point:
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return _value * 2.54 / 72;
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default:
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Debug.Assert(false, "Missing unit type");
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return 0;
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}
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}
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set
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{
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_value = (float)value;
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_type = UnitType.Centimeter;
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_initialized = true;
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}
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}
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//[Obsolete("Use Centimeter")]
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//public double Cm
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//{
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// get { return Centimeter; }
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// set { Centimeter = value; }
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//}
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/// <summary>
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/// Gets or sets the value in inch.
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/// </summary>
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public double Inch
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{
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get
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{
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if (IsNull)
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return 0;
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switch (_type)
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{
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case UnitType.Centimeter:
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return _value / 2.54;
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case UnitType.Inch:
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return _value;
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case UnitType.Millimeter:
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return _value / 25.4;
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case UnitType.Pica:
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return _value * 12 / 72;
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case UnitType.Point:
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return _value / 72;
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default:
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Debug.Assert(false, "Missing unit type");
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return 0;
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}
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}
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set
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{
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_value = (float)value;
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_type = UnitType.Inch;
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_initialized = true;
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}
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}
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//[Obsolete("Use Inch")]
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//public double In
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//{
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// get { return Inch; }
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// set { Inch = value; }
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//}
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/// <summary>
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/// Gets or sets the value in millimeter.
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/// </summary>
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public double Millimeter
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{
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get
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{
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if (IsNull)
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return 0;
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switch (_type)
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{
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case UnitType.Centimeter:
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return _value * 10;
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case UnitType.Inch:
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return _value * 25.4;
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case UnitType.Millimeter:
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return _value;
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case UnitType.Pica:
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return _value * 12 * 25.4 / 72;
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case UnitType.Point:
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return _value * 25.4 / 72;
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default:
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Debug.Assert(false, "Missing unit type");
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return 0;
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}
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}
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set
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{
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_value = (float)value;
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_type = UnitType.Millimeter;
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_initialized = true;
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}
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}
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//[Obsolete("Use Millimeter")]
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//public double Mm
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//{
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// get { return Millimeter; }
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// set { Millimeter = value; }
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//}
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/// <summary>
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/// Gets or sets the value in pica.
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/// </summary>
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public double Pica
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{
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get
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{
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if (IsNull)
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return 0;
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switch (_type)
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{
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case UnitType.Centimeter:
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return _value * 72 / 2.54 / 12;
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case UnitType.Inch:
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return _value * 72 / 12;
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case UnitType.Millimeter:
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return _value * 72 / 25.4 / 12;
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case UnitType.Pica:
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return _value;
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case UnitType.Point:
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return _value / 12;
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default:
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Debug.Assert(false, "Missing unit type");
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return 0;
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}
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}
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set
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{
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_value = (float)value;
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_type = UnitType.Pica;
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_initialized = true;
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}
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}
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//[Obsolete("Use Pica")]
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//public double Pc
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//{
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// get { return Pica; }
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// set { Pica = value; }
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//}
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#endregion
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#region Methods
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/// <summary>
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/// Returns the object as string using the format information.
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/// Measure will be added to the end of the string.
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/// </summary>
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public string ToString(System.IFormatProvider formatProvider)
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{
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if (IsNull)
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return 0.ToString(formatProvider);
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string valuestring = _value.ToString(formatProvider) + GetSuffix();
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return valuestring;
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}
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/// <summary>
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/// Returns the object as string using the format.
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/// Measure will be added to the end of the string.
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/// </summary>
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public string ToString(string format)
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{
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if (IsNull)
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return 0.ToString(format);
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string valuestring = _value.ToString(format) + GetSuffix();
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return valuestring;
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}
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/// <summary>
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/// Returns the object as string using the specified format and format information.
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/// Measure will be added to the end of the string.
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/// </summary>
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string IFormattable.ToString(string format, IFormatProvider formatProvider)
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{
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if (IsNull)
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return 0.ToString(format, formatProvider);
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||
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string valuestring = _value.ToString(format, formatProvider) + GetSuffix();
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return valuestring;
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}
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||
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/// <summary>
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||
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/// Returns the object as string. Measure will be added to the end of the string.
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||
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/// </summary>
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public override string ToString()
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{
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||
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if (IsNull)
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|
|
return 0.ToString(System.Globalization.CultureInfo.InvariantCulture);
|
||
|
|
|
||
|
|
string valuestring = _value.ToString(System.Globalization.CultureInfo.InvariantCulture) + GetSuffix();
|
||
|
|
return valuestring;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns the type of the object as a string like 'pc', 'cm', or 'in'. Empty string is equal to 'pt'.
|
||
|
|
/// </summary>
|
||
|
|
string GetSuffix()
|
||
|
|
{
|
||
|
|
switch (_type)
|
||
|
|
{
|
||
|
|
case UnitType.Centimeter:
|
||
|
|
return "cm";
|
||
|
|
|
||
|
|
case UnitType.Inch:
|
||
|
|
return "in";
|
||
|
|
|
||
|
|
case UnitType.Millimeter:
|
||
|
|
return "mm";
|
||
|
|
|
||
|
|
case UnitType.Pica:
|
||
|
|
return "pc";
|
||
|
|
|
||
|
|
case UnitType.Point:
|
||
|
|
//Point is default, so leave this blank.
|
||
|
|
return "";
|
||
|
|
|
||
|
|
default:
|
||
|
|
Debug.Assert(false, "Missing unit type");
|
||
|
|
return "";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns a Unit object. Sets type to centimeter.
|
||
|
|
/// </summary>
|
||
|
|
public static Unit FromCentimeter(double value)
|
||
|
|
{
|
||
|
|
Unit unit = Unit.Zero;
|
||
|
|
unit._value = (float)value;
|
||
|
|
unit._type = UnitType.Centimeter;
|
||
|
|
return unit;
|
||
|
|
}
|
||
|
|
|
||
|
|
//[Obsolete("Use FromCentimer")]
|
||
|
|
//public static Unit FromCm(double value)
|
||
|
|
//{
|
||
|
|
// return FromCentimeter(value);
|
||
|
|
//}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns a Unit object. Sets type to millimeter.
|
||
|
|
/// </summary>
|
||
|
|
public static Unit FromMillimeter(double value)
|
||
|
|
{
|
||
|
|
Unit unit = Unit.Zero;
|
||
|
|
unit._value = (float)value;
|
||
|
|
unit._type = UnitType.Millimeter;
|
||
|
|
return unit;
|
||
|
|
}
|
||
|
|
|
||
|
|
///// <summary>
|
||
|
|
///// Returns a Unit object. Sets type to millimeter.
|
||
|
|
///// </summary>
|
||
|
|
//[Obsolete("Use FromMillimeter")]
|
||
|
|
//public static Unit FromMm(double value)
|
||
|
|
//{
|
||
|
|
// return FromMillimeter(value);
|
||
|
|
//}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns a Unit object. Sets type to point.
|
||
|
|
/// </summary>
|
||
|
|
public static Unit FromPoint(double value)
|
||
|
|
{
|
||
|
|
Unit unit = Unit.Zero;
|
||
|
|
unit._value = (float)value;
|
||
|
|
unit._type = UnitType.Point;
|
||
|
|
return unit;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns a Unit object. Sets type to inch.
|
||
|
|
/// </summary>
|
||
|
|
public static Unit FromInch(double value)
|
||
|
|
{
|
||
|
|
Unit unit = Unit.Zero;
|
||
|
|
unit._value = (float)value;
|
||
|
|
unit._type = UnitType.Inch;
|
||
|
|
return unit;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns a Unit object. Sets type to pica.
|
||
|
|
/// </summary>
|
||
|
|
public static Unit FromPica(double value)
|
||
|
|
{
|
||
|
|
Unit unit = Unit.Zero;
|
||
|
|
unit._value = (float)value;
|
||
|
|
unit._type = UnitType.Pica;
|
||
|
|
return unit;
|
||
|
|
}
|
||
|
|
#endregion
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Converts a string to a Unit object.
|
||
|
|
/// If the string contains a suffix like 'cm' or 'in' the object will be converted
|
||
|
|
/// to the appropriate type, otherwise point is assumed.
|
||
|
|
/// </summary>
|
||
|
|
public static implicit operator Unit(string value)
|
||
|
|
{
|
||
|
|
Unit unit = Zero;
|
||
|
|
value = value.Trim();
|
||
|
|
|
||
|
|
// For Germans...
|
||
|
|
value = value.Replace(',', '.');
|
||
|
|
|
||
|
|
int count = value.Length;
|
||
|
|
int valLen = 0;
|
||
|
|
for (; valLen < count; )
|
||
|
|
{
|
||
|
|
char ch = value[valLen];
|
||
|
|
if (ch == '.' || ch == '-' || ch == '+' || Char.IsNumber(ch))
|
||
|
|
valLen++;
|
||
|
|
else
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
unit._value = 1;
|
||
|
|
try
|
||
|
|
{
|
||
|
|
unit._value = float.Parse(value.Substring(0, valLen).Trim(), System.Globalization.CultureInfo.InvariantCulture);
|
||
|
|
}
|
||
|
|
catch (FormatException ex)
|
||
|
|
{
|
||
|
|
throw new ArgumentException(DomSR.InvalidUnitValue(value), ex);
|
||
|
|
}
|
||
|
|
|
||
|
|
string typeStr = value.Substring(valLen).Trim().ToLower();
|
||
|
|
unit._type = UnitType.Point;
|
||
|
|
switch (typeStr)
|
||
|
|
{
|
||
|
|
case "cm":
|
||
|
|
unit._type = UnitType.Centimeter;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "in":
|
||
|
|
unit._type = UnitType.Inch;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "mm":
|
||
|
|
unit._type = UnitType.Millimeter;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "pc":
|
||
|
|
unit._type = UnitType.Pica;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "":
|
||
|
|
case "pt":
|
||
|
|
unit._type = UnitType.Point;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
throw new ArgumentException(DomSR.InvalidUnitType(typeStr));
|
||
|
|
}
|
||
|
|
|
||
|
|
return unit;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Converts an int to a Unit object with type set to point.
|
||
|
|
/// </summary>
|
||
|
|
public static implicit operator Unit(int value)
|
||
|
|
{
|
||
|
|
Unit unit = Zero;
|
||
|
|
unit._value = value;
|
||
|
|
unit._type = UnitType.Point;
|
||
|
|
return unit;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Converts a float to a Unit object with type set to point.
|
||
|
|
/// </summary>
|
||
|
|
public static implicit operator Unit(float value)
|
||
|
|
{
|
||
|
|
Unit unit = Zero;
|
||
|
|
unit._value = value;
|
||
|
|
unit._type = UnitType.Point;
|
||
|
|
return unit;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Converts a double to a Unit object with type set to point.
|
||
|
|
/// </summary>
|
||
|
|
public static implicit operator Unit(double value)
|
||
|
|
{
|
||
|
|
Unit unit = Zero;
|
||
|
|
unit._value = (float)value;
|
||
|
|
unit._type = UnitType.Point;
|
||
|
|
return unit;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns a double value as point.
|
||
|
|
/// </summary>
|
||
|
|
public static implicit operator double(Unit value)
|
||
|
|
{
|
||
|
|
return value.Point;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Returns a float value as point.
|
||
|
|
/// </summary>
|
||
|
|
public static implicit operator float(Unit value)
|
||
|
|
{
|
||
|
|
return (float)value.Point;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Memberwise comparison. To compare by value,
|
||
|
|
/// use code like Math.Abs(a.Point - b.Point) < 1e-5.
|
||
|
|
/// </summary>
|
||
|
|
public static bool operator ==(Unit l, Unit r)
|
||
|
|
{
|
||
|
|
// ReSharper disable CompareOfFloatsByEqualityOperator
|
||
|
|
return (l._initialized == r._initialized && l._type == r._type && l._value == r._value);
|
||
|
|
// ReSharper restore CompareOfFloatsByEqualityOperator
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Memberwise comparison. To compare by value,
|
||
|
|
/// use code like Math.Abs(a.Point - b.Point) < 1e-5.
|
||
|
|
/// </summary>
|
||
|
|
public static bool operator !=(Unit l, Unit r)
|
||
|
|
{
|
||
|
|
return !(l == r);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Calls base class Equals.
|
||
|
|
/// </summary>
|
||
|
|
public override bool Equals(Object obj)
|
||
|
|
{
|
||
|
|
return base.Equals(obj);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Calls base class GetHashCode.
|
||
|
|
/// </summary>
|
||
|
|
public override int GetHashCode()
|
||
|
|
{
|
||
|
|
return base.GetHashCode();
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// This member is intended to be used by XmlDomainObjectReader only.
|
||
|
|
/// </summary>
|
||
|
|
public static Unit Parse(string value)
|
||
|
|
{
|
||
|
|
Unit unit = Zero;
|
||
|
|
unit = value;
|
||
|
|
return unit;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Converts an existing object from one unit into another unit type.
|
||
|
|
/// </summary>
|
||
|
|
public void ConvertType(UnitType type)
|
||
|
|
{
|
||
|
|
if (_type == type)
|
||
|
|
return;
|
||
|
|
|
||
|
|
switch (type)
|
||
|
|
{
|
||
|
|
case UnitType.Centimeter:
|
||
|
|
_value = (float)Centimeter;
|
||
|
|
_type = UnitType.Centimeter;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case UnitType.Inch:
|
||
|
|
_value = (float)Inch;
|
||
|
|
_type = UnitType.Inch;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case UnitType.Millimeter:
|
||
|
|
_value = (float)Millimeter;
|
||
|
|
_type = UnitType.Millimeter;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case UnitType.Pica:
|
||
|
|
_value = (float)Pica;
|
||
|
|
_type = UnitType.Pica;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case UnitType.Point:
|
||
|
|
_value = (float)Point;
|
||
|
|
_type = UnitType.Point;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
if (!Enum.IsDefined(typeof(UnitType), type))
|
||
|
|
throw new ArgumentException(DomSR.InvalidUnitType(type.ToString()));
|
||
|
|
|
||
|
|
// Remember missing unit type.
|
||
|
|
Debug.Assert(false, "Missing unit type");
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Represents the uninitialized Unit object.
|
||
|
|
/// </summary>
|
||
|
|
public static readonly Unit Empty = new Unit();
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Represents an initialized Unit object with value 0 and unit type point.
|
||
|
|
/// </summary>
|
||
|
|
public static readonly Unit Zero = new Unit(0);
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Represents the uninitialized Unit object. Same as Unit.Empty.
|
||
|
|
/// </summary>
|
||
|
|
public static readonly Unit NullValue = Empty;
|
||
|
|
|
||
|
|
bool _initialized;
|
||
|
|
float _value;
|
||
|
|
UnitType _type;
|
||
|
|
}
|
||
|
|
}
|