示例#1
0
        private string[] Paginate(StringBuilder fullText, CairoFont font, double pageWidth, double pageHeight, double lineHeight)
        {
            TextSizeProber prober = new TextSizeProber();
            Stack <string> lines  = new Stack <string>(prober.InsertAutoLineBreaks(font, fullText, pageWidth).Reverse());

            double lineheight      = prober.GetLineHeight(font, lineHeight);
            int    maxlinesPerPage = (int)(pageHeight / lineheight);

            List <string> pagesTemp   = new List <string>();
            StringBuilder pageBuilder = new StringBuilder();

            while (lines.Count > 0)
            {
                int currentPageLines = 0;

                while (currentPageLines < maxlinesPerPage && lines.Count > 0)
                {
                    string   line  = lines.Pop();
                    string[] parts = line.Split(new string[] { "___NEWPAGE___" }, 2, StringSplitOptions.None);

                    if (parts.Length > 1)
                    {
                        pageBuilder.AppendLine(parts[0]);
                        if (parts[1].Length > 0)
                        {
                            lines.Push(parts[1]);
                        }
                        break;
                    }

                    currentPageLines++;
                    pageBuilder.AppendLine(line);
                }

                string pageText = pageBuilder.ToString().TrimEnd();

                if (pageText.Length > 0)
                {
                    pagesTemp.Add(pageText);
                }

                pageBuilder.Clear();
            }

            return(pagesTemp.ToArray());
        }