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Read the PropertySet Locale property into the PropertyContext by Numpsy · Pull Request #259 · openmcdf/openmcdf · GitHub

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Read the PropertySet Locale property into the PropertyContext #259

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jeremy-visionaid merged 1 commit into from
Dec 5, 2024
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Read the PropertySet Locale property into the PropertyContext #259

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1 change: 1 addition & 0 deletions OpenMcdf.Ole.Tests/OlePropertiesExtensionsTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -519,6 +519,7 @@ public void TestRetainDictionaryPropertyInAppSpecificStreams()

Assert.AreEqual(ContainerType.AppSpecific, co.ContainerType);
Assert.AreEqual(expectedFmtid0, co.FMTID0);
Assert.AreEqual(1040u, co.Context.Locale);
CollectionAssert.AreEqual(expectedPropertyNames, co.PropertyNames);

// Write test file
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3 changes: 2 additions & 1 deletion OpenMcdf.Ole/OlePropertiesContainer.cs
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Expand Up @@ -65,7 +65,8 @@ public OlePropertiesContainer(CfbStream cfStream)

Context = new PropertyContext()
{
CodePage = pStream.PropertySet0.PropertyContext.CodePage
CodePage = pStream.PropertySet0.PropertyContext.CodePage,

jeremy-visionaid Dec 4, 2024

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Oh wait. Should Context even be a member of OlePropertiesContainer? Can the one from PropertySet be used instead? I'm not sure of the reason for interaction, but its seems just like duplication at a glance.

Numpsy Dec 8, 2024

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Hmm, don't know why it was cloning the context originally, and I didn't think to just use the existing context instance directly on read :-(

The write side at https://github.com/ironfede/openmcdf/blob/319c003b7b71cc232683b3048c4622ef528fa11e/OpenMcdf.Ole/OlePropertiesContainer.cs#L243 is already just using the same context instead of cloning it, so it'd make sense to make them consistent
Locale = pStream.PropertySet0.PropertyContext.Locale
};

for (int i = 0; i < pStream.PropertySet0.Properties.Count; i++)
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14 changes: 14 additions & 0 deletions OpenMcdf.Ole/PropertySet.cs
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Expand Up @@ -13,13 +13,27 @@ internal sealed class PropertySet
public void LoadContext(int propertySetOffset, BinaryReader br)
{
long currPos = br.BaseStream.Position;

// Read the code page - this should always be present
int codePageOffset = (int)(propertySetOffset + PropertyIdentifierAndOffsets.First(pio => pio.PropertyIdentifier == SpecialPropertyIdentifiers.CodePage).Offset);
br.BaseStream.Seek(codePageOffset, SeekOrigin.Begin);

var vType = (VTPropertyType)br.ReadUInt16();
br.ReadUInt16(); // Ushort Padding
PropertyContext.CodePage = (ushort)br.ReadInt16();

// Read the Locale, if present
PropertyIdentifierAndOffset? localeProperty = PropertyIdentifierAndOffsets.FirstOrDefault(pio => pio.PropertyIdentifier == SpecialPropertyIdentifiers.Locale);
if (localeProperty is not null)
{
long localeOffset = (propertySetOffset + localeProperty.Offset);
br.BaseStream.Seek(localeOffset, SeekOrigin.Begin);

vType = (VTPropertyType)br.ReadUInt16();
br.ReadUInt16(); // Ushort Padding
PropertyContext.Locale = br.ReadUInt32();
}

br.BaseStream.Position = currPos;
}

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