282 lines
10 KiB
C#
282 lines
10 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.Reflection;
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namespace MigraDoc.DocumentObjectModel.publics
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{
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/// <summary>
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/// Meta class for document objects.
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/// </summary>
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public sealed class Meta
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{
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/// <summary>
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/// Initializes a new instance of the DomMeta class.
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/// </summary>
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public Meta(Type documentObjectType)
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{
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AddValueDescriptors(this, documentObjectType);
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}
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/// <summary>
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/// Gets the meta object of the specified document object.
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/// </summary>
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/// <param name="documentObject">The document object the meta is returned for.</param>
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public static Meta GetMeta(DocumentObject documentObject)
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{
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return documentObject.Meta;
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}
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/// <summary>
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/// Gets the object specified by name from dom.
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/// </summary>
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public object GetValue(DocumentObject dom, string name, GV flags)
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{
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int dot = name.IndexOf('.');
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if (dot == 0)
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throw new ArgumentException(DomSR.InvalidValueName(name));
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string trail = null;
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if (dot > 0)
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{
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trail = name.Substring(dot + 1);
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name = name.Substring(0, dot);
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}
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ValueDescriptor vd = _vds[name];
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if (vd == null)
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throw new ArgumentException(DomSR.InvalidValueName(name));
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object value = vd.GetValue(dom, flags);
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if (value == null && flags == GV.GetNull) //??? also for GV.ReadOnly?
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return null;
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//REVIEW DaSt: Create object in case of GV.ReadWrite?
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if (trail != null)
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{
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if (value == null || trail == "")
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throw new ArgumentException(DomSR.InvalidValueName(name));
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DocumentObject doc = value as DocumentObject;
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if (doc == null)
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throw new ArgumentException(DomSR.InvalidValueName(name));
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value = doc.GetValue(trail, flags);
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}
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return value;
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}
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/// <summary>
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/// Sets the member of dom specified by name to val.
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/// If a member with the specified name does not exist an ArgumentException will be thrown.
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/// </summary>
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public void SetValue(DocumentObject dom, string name, object val)
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{
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int dot = name.IndexOf('.');
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if (dot == 0)
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throw new ArgumentException(DomSR.InvalidValueName(name));
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string trail = null;
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if (dot > 0)
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{
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trail = name.Substring(dot + 1);
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name = name.Substring(0, dot);
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}
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ValueDescriptor vd = _vds[name];
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if (vd == null)
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throw new ArgumentException(DomSR.InvalidValueName(name));
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if (trail != null)
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{
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//REVIEW DaSt: dom.GetValue(name) and call SetValue recursively,
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// or dom.GetValue(name.BisVorletzteElement) and then call SetValue?
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DocumentObject doc = (DocumentObject)dom.GetValue(name);
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doc.SetValue(trail, val);
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}
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else
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vd.SetValue(dom, val);
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}
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/// <summary>
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/// Determines whether this meta contains a value with the specified name.
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/// </summary>
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public bool HasValue(string name)
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{
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ValueDescriptor vd = _vds[name];
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return vd != null;
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}
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/// <summary>
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/// Sets the member of dom specified by name to null.
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/// If a member with the specified name does not exist an ArgumentException will be thrown.
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/// </summary>
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public void SetNull(DocumentObject dom, string name)
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{
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ValueDescriptor vd = _vds[name];
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if (vd == null)
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throw new ArgumentException(DomSR.InvalidValueName(name));
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vd.SetNull(dom);
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}
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/// <summary>
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/// Determines whether the member of dom specified by name is null.
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/// If a member with the specified name does not exist an ArgumentException will be thrown.
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/// </summary>
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public /* not virtual */ bool IsNull(DocumentObject dom, string name)
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{
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//bool isNull = false;
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int dot = name.IndexOf('.');
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if (dot == 0)
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throw new ArgumentException(DomSR.InvalidValueName(name));
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string trail = null;
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if (dot > 0)
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{
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trail = name.Substring(dot + 1);
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name = name.Substring(0, dot);
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}
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ValueDescriptor vd = _vds[name];
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if (vd == null)
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throw new ArgumentException(DomSR.InvalidValueName(name));
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if (vd is NullableDescriptor || vd is ValueTypeDescriptor)
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{
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if (trail != null)
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throw new ArgumentException(DomSR.InvalidValueName(name));
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return vd.IsNull(dom);
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}
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DocumentObject docObj = (DocumentObject)vd.GetValue(dom, GV.ReadOnly);
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if (docObj == null)
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return true;
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if (trail != null)
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return docObj.IsNull(trail);
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return docObj.IsNull();
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// DomValueDescriptor vd = vds[name];
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// if (vd == null)
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// throw new ArgumentException(DomSR.InvalidValueName(name));
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//
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// return vd.IsNull(dom);
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}
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/// <summary>
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/// Sets all members of the specified dom to null.
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/// </summary>
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public /*virtual*/ void SetNull(DocumentObject dom)
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{
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int count = _vds.Count;
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for (int index = 0; index < count; index++)
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{
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if (!_vds[index].IsRefOnly)
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_vds[index].SetNull(dom);
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}
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}
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/// <summary>
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/// Determines whether all members of the specified dom are null. If dom contains no members IsNull
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/// returns true.
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/// </summary>
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public bool IsNull(DocumentObject dom)
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{
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int count = _vds.Count;
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for (int index = 0; index < count; index++)
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{
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ValueDescriptor vd = _vds[index];
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if (vd.IsRefOnly)
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continue;
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if (!vd.IsNull(dom))
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return false;
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}
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return true;
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}
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/// <summary>
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/// Gets the DomValueDescriptor of the member specified by name from the DocumentObject.
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/// </summary>
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public ValueDescriptor this[string name]
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{
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get { return _vds[name]; }
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}
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/// <summary>
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/// Gets the DomValueDescriptorCollection of the DocumentObject.
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/// </summary>
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public ValueDescriptorCollection ValueDescriptors
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{
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get { return _vds; }
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}
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readonly ValueDescriptorCollection _vds = new ValueDescriptorCollection();
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/// <summary>
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/// Adds a value descriptor for each field and property found in type to meta.
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/// </summary>
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static void AddValueDescriptors(Meta meta, Type type)
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{
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#if !NETFX_CORE
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FieldInfo[] fieldInfos = type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
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#else
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var fieldInfos = type.GetTypeInfo().DeclaredFields;
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#endif
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foreach (FieldInfo fieldInfo in fieldInfos)
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{
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#if DEBUG_
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string name = fieldInfo.Name;
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if (name == "parent")
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name.GetType();
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#endif
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DVAttribute[] dvs = (DVAttribute[])fieldInfo.GetCustomAttributes(typeof(DVAttribute), false);
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if (dvs.Length == 1)
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{
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ValueDescriptor vd = ValueDescriptor.CreateValueDescriptor(fieldInfo, dvs[0]);
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meta.ValueDescriptors.Add(vd);
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}
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}
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#if !NETFX_CORE
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PropertyInfo[] propInfos = type.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
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#else
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var propInfos = type.GetTypeInfo().DeclaredProperties;
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#endif
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foreach (PropertyInfo propInfo in propInfos)
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{
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#if DEBUG_
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string name = propInfo.Name;
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if (name == "Font")
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name.GetType();
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#endif
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DVAttribute[] dvs = (DVAttribute[])propInfo.GetCustomAttributes(typeof(DVAttribute), false);
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if (dvs.Length == 1)
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{
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ValueDescriptor vd = ValueDescriptor.CreateValueDescriptor(propInfo, dvs[0]);
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meta.ValueDescriptors.Add(vd);
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}
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}
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}
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}
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}
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