Tested using LO 6.2.0.3 on Fedora Linux.
I wanted to find all instances of Italic text using the API and select that text. I created a simple document with four areas that were Italic. I used the following macro and, although FindAll does return all italic text, it only selects the last three instances and not the first one.
My example had two instances in normal text and two instances in a text table.
If I have more than once instance, it ignores the first. If I have ONLY one instance of Italic text, it will select the text.
Sub FindItalic_all
Dim oDescriptor 'The search descriptor
Dim oFound 'The found range
Dim SrchAttributes(0) as new com.sun.star.beans.PropertyValue
SrchAttributes(0).Name = "CharPosture"
SrchAttributes(0).Value = com.sun.star.awt.FontSlant.ITALIC
' SrchAttributes(0).Name = "CharFontName"
' SrchAttributes(0).Value = "Comic Sans MS"
oDescriptor = ThisComponent.createSearchDescriptor()
oDescriptor.SetSearchAttributes(SrchAttributes)
oFound = ThisComponent.findAll(oDescriptor)
' Dim i As Integer
' for i = 0 To oFound.Count - 1
' Print oFound.getByIndex(i).getString(i)
' Next
Thiscomponent.getCurrentController.select(oFound)
End Sub