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soukoku
382
src/NTwain/DataSource.cs
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382
src/NTwain/DataSource.cs
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using NTwain.Data;
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using NTwain.Internals;
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using NTwain.Triplets;
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.Globalization;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Threading;
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namespace NTwain
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{
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/// <summary>
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/// Represents a TWAIN data source.
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/// </summary>
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public partial class DataSource : IDataSource
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{
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ITwainSessionInternal _session;
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internal DataSource(ITwainSessionInternal session, TWIdentity sourceId)
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{
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_session = session;
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Identity = sourceId;
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ProtocolVersion = new Version(sourceId.ProtocolMajor, sourceId.ProtocolMinor);
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}
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/// <summary>
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/// Opens the source for capability negotiation.
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/// </summary>
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/// <returns></returns>
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public ReturnCode Open()
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{
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var rc = ReturnCode.Failure;
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_session.MessageLoopHook.Invoke(() =>
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{
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Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Thread {0}: OpenSource.", Thread.CurrentThread.ManagedThreadId));
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rc = _session.DGControl.Identity.OpenDS(this);
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_session.UpdateCallback();
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});
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return rc;
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}
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/// <summary>
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/// Closes the source.
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/// </summary>
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/// <returns></returns>
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public ReturnCode Close()
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{
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var rc = ReturnCode.Failure;
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_session.MessageLoopHook.Invoke(() =>
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{
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Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Thread {0}: CloseSource.", Thread.CurrentThread.ManagedThreadId));
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rc = _session.DGControl.Identity.CloseDS();
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//if (rc == ReturnCode.Success)
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//{
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// SupportedCaps = null;
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//}
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_session.UpdateCallback();
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});
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return rc;
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}
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/// <summary>
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/// Enables the source to start transferring.
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/// </summary>
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/// <param name="mode">The mode.</param>
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/// <param name="modal">if set to <c>true</c> any driver UI will display as modal.</param>
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/// <param name="windowHandle">The window handle if modal.</param>
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/// <returns></returns>
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public ReturnCode Enable(SourceEnableMode mode, bool modal, IntPtr windowHandle)
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{
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return _session.EnableSource(mode, modal, windowHandle);
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}
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/// <summary>
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/// Gets the source status. Only call this at state 4 or higher.
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/// </summary>
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/// <returns></returns>
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public TWStatus GetStatus()
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{
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TWStatus stat;
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_session.DGControl.Status.GetSource(out stat);
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return stat;
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}
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/// <summary>
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/// Gets the source status. Only call this at state 4 or higher.
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/// </summary>
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/// <returns></returns>
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public TWStatusUtf8 GetStatusUtf8()
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{
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TWStatusUtf8 stat;
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_session.DGControl.StatusUtf8.GetSource(out stat);
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return stat;
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}
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#region properties
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internal TWIdentity Identity { get; private set; }
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/// <summary>
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/// Gets the source's product name.
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/// </summary>
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/// <value>
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/// The name.
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/// </value>
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public string Name { get { return Identity.ProductName; } }
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/// <summary>
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/// Gets the source's manufacturer name.
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/// </summary>
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/// <value>
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/// The manufacturer.
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/// </value>
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public string Manufacturer { get { return Identity.Manufacturer; } }
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/// <summary>
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/// Gets the source's product family.
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/// </summary>
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/// <value>
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/// The product family.
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/// </value>
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public string ProductFamily { get { return Identity.ProductFamily; } }
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/// <summary>
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/// Gets the source's version information.
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/// </summary>
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/// <value>
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/// The version.
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/// </value>
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public TWVersion Version { get { return Identity.Version; } }
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/// <summary>
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/// Gets the supported data group.
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/// </summary>
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/// <value>
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/// The data group.
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/// </value>
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public DataGroups DataGroup { get { return Identity.DataGroup; } }
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/// <summary>
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/// Gets the supported TWAIN protocol version.
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/// </summary>
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/// <value>
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/// The protocol version.
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/// </value>
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public Version ProtocolVersion { get; private set; }
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/// <summary>
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/// Gets a value indicating whether this data source has been opened.
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/// </summary>
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/// <value>
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/// <c>true</c> if this data source is open; otherwise, <c>false</c>.
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/// </value>
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public bool IsOpen { get { return _session.IsSourceOpen; } }
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/// <summary>
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/// Gets or sets the current settings (CustomDSData) of this source if supported.
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/// </summary>
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/// <value>
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/// The source settings.
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/// </value>
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public byte[] Settings
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{
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get
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{
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byte[] value = null;
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if (Capabilities.CapCustomDSData.GetCurrent() == BoolType.True)
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{
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TWCustomDSData data;
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if (DGControl.CustomDSData.Get(out data) == ReturnCode.Success && data.InfoLength > 0)
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{
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try
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{
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value = new byte[data.InfoLength];
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var ptr = PlatformInfo.Current.MemoryManager.Lock(data.hData);
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Marshal.Copy(ptr, value, 0, (int)data.InfoLength);
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}
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finally
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{
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PlatformInfo.Current.MemoryManager.Unlock(data.hData);
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PlatformInfo.Current.MemoryManager.Free(data.hData);
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}
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}
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}
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return value;
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}
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set
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{
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if (value != null && value.Length > 0 &&
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Capabilities.CapCustomDSData.GetCurrent() == BoolType.True)
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{
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TWCustomDSData data = new TWCustomDSData
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{
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InfoLength = (uint)value.Length
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};
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try
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{
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data.hData = PlatformInfo.Current.MemoryManager.Allocate(data.InfoLength);
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var ptr = PlatformInfo.Current.MemoryManager.Lock(data.hData);
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Marshal.Copy(value, 0, ptr, value.Length);
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var rc = DGControl.CustomDSData.Set(data);
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if (rc != ReturnCode.Success)
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{
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// do something
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}
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}
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finally
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{
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if (data.hData != IntPtr.Zero)
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{
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PlatformInfo.Current.MemoryManager.Unlock(data.hData);
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PlatformInfo.Current.MemoryManager.Free(data.hData);
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}
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}
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}
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}
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}
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//static readonly CapabilityId[] _emptyCapList = new CapabilityId[0];
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//private IList<CapabilityId> _supportedCapsList;
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///// <summary>
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///// Gets the list of supported caps for this source.
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///// </summary>
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///// <value>
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///// The supported caps.
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///// </value>
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//[Obsolete("Use CapSupportedCaps.Get() instead.")]
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//public IList<CapabilityId> SupportedCaps
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//{
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// get
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// {
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// if (_supportedCapsList == null && _session.State > 3)
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// {
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// _supportedCapsList = CapSupportedCaps.GetValues();
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// }
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// return _supportedCapsList ?? _emptyCapList;
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// }
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// private set
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// {
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// _supportedCapsList = value;
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// //OnPropertyChanged("SupportedCaps");
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// }
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//}
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private Capabilities _caps;
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/// <summary>
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/// Gets the capabilities for this data source.
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/// </summary>
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/// <value>
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/// The capabilities.
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/// </value>
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public Capabilities Capabilities
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{
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get { return _caps ?? (_caps = new Capabilities(this)); }
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}
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/// <summary>
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/// Gets the triplet operations defined for control data group.
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/// </summary>
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public DGControl DGControl
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{
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get
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{
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return _session.DGControl;
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}
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}
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/// <summary>
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/// Gets the triplet operations defined for image data group.
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/// </summary>
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public DGImage DGImage
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{
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get
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{
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return _session.DGImage;
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}
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}
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/// <summary>
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/// Gets the direct triplet operation entry for custom values.
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/// </summary>
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public DGCustom DGCustom
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{
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get
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{
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return _session.DGCustom;
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}
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}
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#endregion
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//#region INotifyPropertyChanged Members
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///// <summary>
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///// Occurs when a property value changes.
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///// </summary>
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//public event PropertyChangedEventHandler PropertyChanged;
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///// <summary>
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///// Raises the <see cref="PropertyChanged"/> event.
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///// </summary>
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///// <param name="propertyName">Name of the property.</param>
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//protected void OnPropertyChanged(string propertyName)
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//{
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// var syncer = Session.SynchronizationContext;
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// if (syncer == null)
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// {
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// try
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// {
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// var hand = PropertyChanged;
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// if (hand != null) { hand(this, new PropertyChangedEventArgs(propertyName)); }
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// }
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// catch { }
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// }
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// else
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// {
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// syncer.Post(o =>
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// {
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// try
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// {
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// var hand = PropertyChanged;
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// if (hand != null) { hand(this, new PropertyChangedEventArgs(propertyName)); }
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// }
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// catch { }
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// }, null);
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// }
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//}
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//#endregion
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#region cameras
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/// <summary>
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/// [Experimental] Gets the cameras supported by the source.
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/// </summary>
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/// <returns></returns>
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public IList<string> GetCameras()
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{
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TWFileSystem fs = new TWFileSystem();
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List<string> cams = new List<string>();
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var rc = DGControl.FileSystem.GetFirstFile(fs);
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while (rc == ReturnCode.Success)
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{
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switch (fs.FileType)
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{
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case FileType.Camera:
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case FileType.CameraBottom:
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case FileType.CameraTop:
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case FileType.CameraPreview:
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cams.Add(fs.OutputName);
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break;
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}
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rc = DGControl.FileSystem.GetNextFile(fs);
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}
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return cams;
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}
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/// <summary>
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/// [Experimental] Sets the target camera for cap negotiation that can be set per camera.
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/// </summary>
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/// <param name="cameraName"></param>
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/// <returns></returns>
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public ReturnCode SetCamera(string cameraName)
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{
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TWFileSystem fs = new TWFileSystem();
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fs.InputName = cameraName;
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return DGControl.FileSystem.ChangeDirectory(fs);
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}
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#endregion
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}
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}
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