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Added workaround for sources that don't support querysupport call.

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soukoku
2015-02-13 21:34:12 -05:00
parent 0f4e258970
commit bace6e6323
17 changed files with 418 additions and 144 deletions
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205
NTwain/CapWrapper.cs
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@@ -15,10 +15,11 @@ namespace NTwain
/// <typeparam name="TValue">The TWAIN type of the value.</typeparam>
public class CapWrapper<TValue> : NTwain.ICapWrapper<TValue>
{
ICapControl _source;
IDataSource _source;
Func<object, TValue> _getConvertRoutine;
Func<TValue, ReturnCode> _setCustomRoutine;
Func<TValue, TWOneValue> _setOneValueFunc;
bool _readOnly;
/// <summary>
/// Initializes a new instance of the <see cref="CapWrapper{TValue}" /> class.
@@ -31,16 +32,18 @@ namespace NTwain
/// or
/// getConversionRoutine
/// </exception>
public CapWrapper(ICapControl source, CapabilityId capability,
Func<object, TValue> getConversionRoutine)
public CapWrapper(IDataSource source, CapabilityId capability,
Func<object, TValue> getConversionRoutine, bool readOnly)
{
if (source == null) { throw new ArgumentNullException("source"); }
if (getConversionRoutine == null) { throw new ArgumentNullException("getConversionRoutine"); }
_source = source;
_getConvertRoutine = getConversionRoutine;
_readOnly = readOnly;
Capability = capability;
SupportedActions = source.CapQuerySupport(capability);
CheckSupports();
}
@@ -58,7 +61,7 @@ namespace NTwain
/// or
/// setValueProvider
/// </exception>
public CapWrapper(ICapControl source, CapabilityId capability,
public CapWrapper(IDataSource source, CapabilityId capability,
Func<object, TValue> getConversionRoutine,
Func<TValue, TWOneValue> setValueProvider)
{
@@ -70,7 +73,8 @@ namespace NTwain
_getConvertRoutine = getConversionRoutine;
_setOneValueFunc = setValueProvider;
Capability = capability;
SupportedActions = source.CapQuerySupport(capability);
CheckSupports();
}
/// <summary>
@@ -87,7 +91,7 @@ namespace NTwain
/// or
/// setValueRoutine
/// </exception>
public CapWrapper(ICapControl source, CapabilityId capability,
public CapWrapper(IDataSource source, CapabilityId capability,
Func<object, TValue> getConversionRoutine,
Func<TValue, ReturnCode> setValueRoutine)
{
@@ -99,7 +103,51 @@ namespace NTwain
_getConvertRoutine = getConversionRoutine;
_setCustomRoutine = setValueRoutine;
Capability = capability;
SupportedActions = source.CapQuerySupport(capability);
CheckSupports();
}
private void CheckSupports()
{
if (!_supports.HasValue && _source.IsOpen)
{
var srcVersion = _source.ProtocolVersion;
if (srcVersion >= ProtocolVersions.GetMinimumVersion(Capability))
{
_supports = _source.CapQuerySupport(Capability);
if (!_supports.HasValue)
{
// lame source, have to guess using a get call
using (TWCapability cap = new TWCapability(Capability))
{
var rc = _source.DGControl.Capability.Get(cap);
if (rc == ReturnCode.Success)
{
// assume can do common things
if (_readOnly)
{
_supports = QuerySupports.Get | QuerySupports.GetCurrent | QuerySupports.GetDefault;
}
else
{
_supports = QuerySupports.Get | QuerySupports.GetCurrent | QuerySupports.GetDefault |
QuerySupports.Set | QuerySupports.Reset | QuerySupports.SetConstraint;
}
}
else
{
_supports = QuerySupports.None;
}
}
}
}
else
{
_supports = QuerySupports.None;
}
}
}
@@ -118,13 +166,22 @@ namespace NTwain
/// </value>
public CapabilityId Capability { get; private set; }
QuerySupports? _supports;
/// <summary>
/// Gets the supported actions.
/// </summary>
/// <value>
/// The supported actions.
/// </value>
public QuerySupports SupportedActions { get; private set; }
public QuerySupports SupportedActions
{
get
{
CheckSupports();
return _supports.GetValueOrDefault();
}
}
/// <summary>
/// Gets a value indicating whether this capability is supported.
@@ -242,11 +299,7 @@ namespace NTwain
/// <returns></returns>
public IList<TValue> Get()
{
if (CanGet)
{
return _source.CapGet(Capability).Select(o => _getConvertRoutine(o)).ToList();
}
return new List<TValue>();
return _source.CapGet(Capability).Select(o => _getConvertRoutine(o)).ToList();
}
/// <summary>
@@ -256,22 +309,20 @@ namespace NTwain
public string GetLabel()
{
object value = null;
if (CanGetLabel)
{
using (TWCapability cap = new TWCapability(Capability))
{
var rc = _source.DGControl.Capability.GetLabel(cap);
if (rc == ReturnCode.Success)
{
var read = CapabilityReader.ReadValue(cap);
switch (read.ContainerType)
{
case ContainerType.OneValue:
// most likely not correct
value = read.OneValue;
break;
}
using (TWCapability cap = new TWCapability(Capability))
{
var rc = _source.DGControl.Capability.GetLabel(cap);
if (rc == ReturnCode.Success)
{
var read = CapabilityReader.ReadValue(cap);
switch (read.ContainerType)
{
case ContainerType.OneValue:
// most likely not correct
value = read.OneValue;
break;
}
}
}
@@ -285,22 +336,19 @@ namespace NTwain
public string GetHelp()
{
object value = null;
if (CanGetHelp)
using (TWCapability cap = new TWCapability(Capability))
{
using (TWCapability cap = new TWCapability(Capability))
var rc = _source.DGControl.Capability.GetHelp(cap);
if (rc == ReturnCode.Success)
{
var rc = _source.DGControl.Capability.GetHelp(cap);
if (rc == ReturnCode.Success)
{
var read = CapabilityReader.ReadValue(cap);
var read = CapabilityReader.ReadValue(cap);
switch (read.ContainerType)
{
case ContainerType.OneValue:
// most likely not correct
value = read.OneValue;
break;
}
switch (read.ContainerType)
{
case ContainerType.OneValue:
// most likely not correct
value = read.OneValue;
break;
}
}
}
@@ -314,15 +362,13 @@ namespace NTwain
public IList<string> GetLabelEnum()
{
var list = new List<object>();
if (CanGetLabelEnum)
using (TWCapability cap = new TWCapability(Capability))
{
using (TWCapability cap = new TWCapability(Capability))
var rc = _source.DGControl.Capability.GetLabelEnum(cap);
if (rc == ReturnCode.Success)
{
var rc = _source.DGControl.Capability.GetLabelEnum(cap);
if (rc == ReturnCode.Success)
{
CapabilityReader.ReadValue(cap).PopulateFromCapValues(list);
}
CapabilityReader.ReadValue(cap).PopulateFromCapValues(list);
}
}
return list.Select(o => o.ToString()).ToList();
@@ -350,24 +396,22 @@ namespace NTwain
public ReturnCode Set(TValue value)
{
ReturnCode rc = ReturnCode.Failure;
if (CanSet)
if (_setCustomRoutine != null)
{
if (_setCustomRoutine != null)
rc = _setCustomRoutine(value);
}
else if (_setOneValueFunc != null)
{
using (var cap = new TWCapability(Capability, _setOneValueFunc(value)))
{
rc = _setCustomRoutine(value);
}
else if (_setOneValueFunc != null)
{
using (var cap = new TWCapability(Capability, _setOneValueFunc(value)))
{
rc = _source.DGControl.Capability.Set(cap);
}
}
else
{
throw new InvalidOperationException("Simple Set() is not defined for this capability.");
rc = _source.DGControl.Capability.Set(cap);
}
}
else
{
throw new InvalidOperationException("Simple Set() is not defined for this capability.");
}
return rc;
}
@@ -379,12 +423,9 @@ namespace NTwain
public ReturnCode Set(TWArray value)
{
ReturnCode rc = ReturnCode.Failure;
if (CanSet)
using (var cap = new TWCapability(Capability, value))
{
using (var cap = new TWCapability(Capability, value))
{
rc = _source.DGControl.Capability.Set(cap);
}
rc = _source.DGControl.Capability.Set(cap);
}
return rc;
}
@@ -397,12 +438,9 @@ namespace NTwain
public ReturnCode Set(TWEnumeration value)
{
ReturnCode rc = ReturnCode.Failure;
if (CanSet)
using (var cap = new TWCapability(Capability, value))
{
using (var cap = new TWCapability(Capability, value))
{
rc = _source.DGControl.Capability.Set(cap);
}
rc = _source.DGControl.Capability.Set(cap);
}
return rc;
}
@@ -415,12 +453,9 @@ namespace NTwain
public ReturnCode SetConstraint(TWOneValue value)
{
ReturnCode rc = ReturnCode.Failure;
if (CanSetConstraint)
using (var cap = new TWCapability(Capability, value))
{
using (var cap = new TWCapability(Capability, value))
{
rc = _source.DGControl.Capability.SetConstraint(cap);
}
rc = _source.DGControl.Capability.SetConstraint(cap);
}
return rc;
}
@@ -433,12 +468,9 @@ namespace NTwain
public ReturnCode SetConstraint(TWEnumeration value)
{
ReturnCode rc = ReturnCode.Failure;
if (CanSetConstraint)
using (var cap = new TWCapability(Capability, value))
{
using (var cap = new TWCapability(Capability, value))
{
rc = _source.DGControl.Capability.SetConstraint(cap);
}
rc = _source.DGControl.Capability.SetConstraint(cap);
}
return rc;
}
@@ -451,12 +483,9 @@ namespace NTwain
public ReturnCode SetConstraint(TWRange value)
{
ReturnCode rc = ReturnCode.Failure;
if (CanSetConstraint)
using (var cap = new TWCapability(Capability, value))
{
using (var cap = new TWCapability(Capability, value))
{
rc = _source.DGControl.Capability.SetConstraint(cap);
}
rc = _source.DGControl.Capability.SetConstraint(cap);
}
return rc;
}