''
'' This code is part of Document Solutions for PDF demos.
'' Copyright (c) MESCIUS inc. All rights reserved.
''
Imports System.IO
Imports System.Drawing
Imports GrapeCity.Documents.Pdf
Imports GrapeCity.Documents.Text

'' This sample lists Unicode ranges available in each system font.
public class UnicodeRanges
    Function CreatePDF(ByVal stream As Stream) As Integer
        '' Setup:
        Dim doc = New GcPdfDocument()
        Dim tl = New TextLayout(72) With {
                .MaxWidth = doc.PageSize.Width,
                .MaxHeight = doc.PageSize.Height,
                .MarginAll = 72
            }
        tl.DefaultFormat.FontSize = 7
        Dim tfH = New TextFormat() With {.Font = StandardFonts.TimesBold, .FontSize = 12}
        Dim tfP = New TextFormat() With {.Font = StandardFonts.Times, .FontSize = 11}

        '' Loop through all system fonts,
        '' list Unicode ranges provided by each font:
        For Each font In FontCollection.SystemFonts
            tl.AppendLine($"{font.FontFileName} [{font.FullFontName}] [{font.FontFamilyName}]", tfH)
            Dim shot = font.CreateFontTables(TableTag.OS2)
            tl.AppendLine(shot.GetUnicodeRanges(), tfP)
            tl.AppendLine()
        Next

        '' Split and render TextLayout as shown in the PaginatedText sample:
        Dim tso = New TextSplitOptions(tl) With {
                .MinLinesInFirstParagraph = 2,
                .MinLinesInLastParagraph = 2
            }
        tl.PerformLayout(True)
        While True
            Dim rest As TextLayout = Nothing
            Dim SplitResult = tl.Split(tso, rest)
            doc.Pages.Add().Graphics.DrawTextLayout(tl, PointF.Empty)
            If SplitResult <> SplitResult.Split Then
                Exit While
            End If
            tl = rest
        End While
        ''
        '' Done:
        doc.Save(stream)
        Return doc.Pages.Count
    End Function
End Class