Aspose::Words::RevisionCollection::idx_get method

RevisionCollection::idx_get method

Returns a Revision at the specified index.

System::SharedPtr<Aspose::Words::Revision> Aspose::Words::RevisionCollection::idx_get(int32_t index)

Parameter	Type	Description
index	int32_t	An index into the collection.

Remarks

The index is zero-based.

Negative indexes are allowed and indicate access from the back of the collection. For example -1 means the last item, -2 means the second before last and so on.

If index is greater than or equal to the number of items in the list, this returns a null reference.

If index is negative and its absolute value is greater than the number of items in the list, this returns a null reference.

Examples

Shows how to work with revisions in a document.

auto doc = MakeObject<Document>();
auto builder = MakeObject<DocumentBuilder>(doc);

// Normal editing of the document does not count as a revision.
builder->Write(u"This does not count as a revision. ");

ASSERT_FALSE(doc->get_HasRevisions());

// To register our edits as revisions, we need to declare an author, and then start tracking them.
doc->StartTrackRevisions(u"John Doe", System::DateTime::get_Now());

builder->Write(u"This is revision #1. ");

ASSERT_TRUE(doc->get_HasRevisions());
ASSERT_EQ(1, doc->get_Revisions()->get_Count());

// This flag corresponds to the "Review" -> "Tracking" -> "Track Changes" option in Microsoft Word.
// The "StartTrackRevisions" method does not affect its value,
// and the document is tracking revisions programmatically despite it having a value of "false".
// If we open this document using Microsoft Word, it will not be tracking revisions.
ASSERT_FALSE(doc->get_TrackRevisions());

// We have added text using the document builder, so the first revision is an insertion-type revision.
SharedPtr<Revision> revision = doc->get_Revisions()->idx_get(0);
ASSERT_EQ(u"John Doe", revision->get_Author());
ASSERT_EQ(u"This is revision #1. ", revision->get_ParentNode()->GetText());
ASSERT_EQ(RevisionType::Insertion, revision->get_RevisionType());
ASSERT_EQ(revision->get_DateTime().get_Date(), System::DateTime::get_Now().get_Date());
ASPOSE_ASSERT_EQ(doc->get_Revisions()->get_Groups()->idx_get(0), revision->get_Group());

// Remove a run to create a deletion-type revision.
doc->get_FirstSection()->get_Body()->get_FirstParagraph()->get_Runs()->idx_get(0)->Remove();

// Adding a new revision places it at the beginning of the revision collection.
ASSERT_EQ(RevisionType::Deletion, doc->get_Revisions()->idx_get(0)->get_RevisionType());
ASSERT_EQ(2, doc->get_Revisions()->get_Count());

// Insert revisions show up in the document body even before we accept/reject the revision.
// Rejecting the revision will remove its nodes from the body. Conversely, nodes that make up delete revisions
// also linger in the document until we accept the revision.
ASSERT_EQ(u"This does not count as a revision. This is revision #1.", doc->GetText().Trim());

// Accepting the delete revision will remove its parent node from the paragraph text
// and then remove the collection's revision itself.
doc->get_Revisions()->idx_get(0)->Accept();

ASSERT_EQ(1, doc->get_Revisions()->get_Count());
ASSERT_EQ(u"This is revision #1.", doc->GetText().Trim());

builder->Writeln(u"");
builder->Write(u"This is revision #2.");

// Now move the node to create a moving revision type.
SharedPtr<Node> node = doc->get_FirstSection()->get_Body()->get_Paragraphs()->idx_get(1);
SharedPtr<Node> endNode = doc->get_FirstSection()->get_Body()->get_Paragraphs()->idx_get(1)->get_NextSibling();
SharedPtr<Node> referenceNode = doc->get_FirstSection()->get_Body()->get_Paragraphs()->idx_get(0);

while (node != endNode)
{
    SharedPtr<Node> nextNode = node->get_NextSibling();
    doc->get_FirstSection()->get_Body()->InsertBefore(node, referenceNode);
    node = nextNode;
}

ASSERT_EQ(RevisionType::Moving, doc->get_Revisions()->idx_get(0)->get_RevisionType());
ASSERT_EQ(8, doc->get_Revisions()->get_Count());
ASSERT_EQ(u"This is revision #2.\rThis is revision #1. \rThis is revision #2.", doc->GetText().Trim());

// The moving revision is now at index 1. Reject the revision to discard its contents.
doc->get_Revisions()->idx_get(1)->Reject();

ASSERT_EQ(6, doc->get_Revisions()->get_Count());
ASSERT_EQ(u"This is revision #1. \rThis is revision #2.", doc->GetText().Trim());

Aspose::Words::RevisionCollection::idx_get method

RevisionCollection::idx_get method

Remarks

Examples

See Also