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https://github.com/wmjordan/PDFPatcher.git
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Calcitem
622 lines
21 KiB
C#
622 lines
21 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Text;
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using System.Xml;
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using iTextSharp.text.pdf;
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using PDFPatcher.Common;
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using PDFPatcher.Model;
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namespace PDFPatcher.Processor
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{
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internal sealed class DocInfoExporter
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{
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const string SimpleBookmarkPageNumLeader = " ………… ";
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const int OpenDocWorkload = 10;
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const int BookmarkWorkload = 30;
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static internal XmlWriterSettings GetWriterSettings() {
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return new XmlWriterSettings() {
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Encoding = AppContext.Exporter.GetEncoding(),
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Indent = true,
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IndentChars = "\t",
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CheckCharacters = false
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};
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}
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readonly PdfReader _reader;
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readonly ExporterOptions _options;
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readonly PdfContentExport _contentExport;
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readonly PdfActionExporter _actionExport;
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Dictionary<int, int> _pageReferenceMapper;
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private Dictionary<int, int> PageReferenceMapper {
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get {
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if (_pageReferenceMapper == null) {
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_pageReferenceMapper = _reader.GetPageRefMapper();
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}
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return _pageReferenceMapper;
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}
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}
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public DocInfoExporter(PdfReader reader, ExporterOptions options) {
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_reader = reader;
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_options = options;
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_contentExport = new PdfContentExport(options);
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_actionExport = new PdfActionExporter(options.UnitConverter);
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}
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internal int EstimateWorkload() {
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var n = _reader.NumberOfPages;
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var load = OpenDocWorkload;
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if (_options.ExportCatalog) {
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load += n / 100;
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}
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if (_options.ExportBookmarks) {
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load += BookmarkWorkload;
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}
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if (_options.ExtractPageLinks) {
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load += n;
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}
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if (_options.ExtractPageContent) {
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load += PageRangeCollection.Parse(_options.ExtractPageRange, 1, n, true).TotalPages;
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}
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if (_options.ExtractPageSettings) {
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load += n;
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}
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return load;
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}
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internal static GeneralInfo RewriteDocInfoWithEncoding(PdfReader pdf, Encoding encoding) {
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try {
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return RewriteDocInfoWithEncoding(pdf.Trailer.GetAsDict(PdfName.INFO), encoding);
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}
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catch (IOException) {
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// 忽略错误的元数据
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return new GeneralInfo();
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}
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}
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internal static GeneralInfo RewriteDocInfoWithEncoding(PdfDictionary info, Encoding encoding) {
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var r = new GeneralInfo();
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if (info == null || info.Length == 0) {
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return r;
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}
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var dump = new PdfDictionary();
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string t;
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PdfName n;
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PdfString s;
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foreach (var item in info) {
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s = item.Value as PdfString;
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if (s == null) {
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continue;
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}
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n = item.Key;
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t = s.Decode(encoding);
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if (PdfName.TITLE.Equals(n)) {
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r.Title = t;
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}
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else if (PdfName.AUTHOR.Equals(n)) {
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r.Author = t;
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}
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else if (PdfName.SUBJECT.Equals(n)) {
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r.Subject = t;
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}
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else if (PdfName.KEYWORDS.Equals(n)) {
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r.Keywords = t;
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}
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else if (PdfName.CREATOR.Equals(n)) {
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r.Creator = t;
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}
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else if (PdfName.PRODUCER.Equals(n)) {
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r.Producer = t;
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}
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dump.Put(n, t);
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}
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if (encoding != null) {
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info.Merge(dump);
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}
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dump = null;
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return r;
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}
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internal static void WriteDocumentInfoAttributes(XmlWriter w, string sourcePath, int numberOfPages) {
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w.WriteAttributeString(Constants.Info.ProductName, System.Windows.Forms.Application.ProductName);
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w.WriteAttributeString(Constants.Info.ProductVersion, Constants.InfoDocVersion);
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w.WriteAttributeString(Constants.Info.ExportDate, DateTime.Now.ToString("yyyy年MM月dd日 HH:mm:ss"));
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//w.WriteAttributeString (Constants.Info.DocumentName, Path.GetFileNameWithoutExtension (sourceFile));
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w.WriteAttributeString(Constants.Info.DocumentPath, sourcePath);
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w.WriteAttributeString(Constants.Info.PageNumber, numberOfPages.ToText());
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}
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internal void ExportDocument(XmlWriter w) {
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Tracker.IncrementProgress(OpenDocWorkload);
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if (_options.UnitConverter.UnitFactor != 1) {
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w.WriteStartElement(Constants.Units.ThisName);
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w.WriteAttributeString(Constants.Units.Unit, _options.UnitConverter.Unit);
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w.WriteEndElement();
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}
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if (_options.ExportDocProperties) {
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Tracker.TraceMessage("导出文档信息。");
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RewriteDocInfoWithEncoding(_reader, AppContext.Encodings.DocInfoEncoding);
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ExportDocumentInfo(w);
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}
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if (_options.ExportViewerPreferences) {
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Tracker.TraceMessage("导出阅读器设置。");
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ExportViewerPreferences(w);
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}
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if (_options.ExportBookmarks || _options.ExtractPageLinks) {
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if (_options.ConsolidateNamedDestinations) {
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_reader.ConsolidateNamedDestinations();
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}
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if (_options.ExportBookmarks) {
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Tracker.TraceMessage("导出书签。");
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w.WriteStartElement(Constants.DocumentBookmark);
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ExportBookmarks(OutlineManager.GetBookmark(_reader, _options.UnitConverter), w);
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w.WriteEndElement();
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Tracker.IncrementProgress(BookmarkWorkload);
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}
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if (_options.ExtractPageLinks) {
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Tracker.TraceMessage("导出页面连接。");
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ExtractPageLinks(w);
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}
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if (_options.ConsolidateNamedDestinations == false) {
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Tracker.TraceMessage("导出命名目标。");
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ExportNamedDestinations(w);
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}
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}
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if (_options.ExtractPageSettings) {
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Tracker.TraceMessage("导出页面设置。");
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w.WriteStartElement(Constants.Content.PageSettings.ThisName);
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ExtractPageSettings(w);
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w.WriteEndElement();
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}
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if (_options.ExportCatalog) {
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_contentExport.ExportTrailer(w, _reader);
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}
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if (_options.ExtractPageContent) {
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_contentExport.ExportContents(w, _reader);
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}
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Tracker.TraceMessage("完成导出任务。");
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}
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internal void ExportDocumentInfo(XmlWriter w) {
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var info = _reader.Catalog;
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w.WriteStartElement(Constants.Info.ThisName);
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if (info.Contains(PdfName.VERSION))
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w.WriteAttributeString(Constants.Version, PdfHelper.GetPdfNameString(info.GetAsName(PdfName.VERSION)));
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info = _reader.Trailer.GetAsDict(PdfName.INFO);
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if (info?.Length > 0) {
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string key, val;
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foreach (var item in info) {
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key = PdfName.DecodeName(item.Key.ToString());
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val = item.Value.IsString() ? ((PdfString)item.Value).Decode(null) : item.Value.ToString();
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switch (key) {
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case "Title": key = Constants.Info.Title; break;
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case "Author": key = Constants.Info.Author; break;
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case "Subject": key = Constants.Info.Subject; break;
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case "Keywords": key = Constants.Info.Keywords; break;
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case "Creator": key = Constants.Info.Creator; break;
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case "Producer": key = Constants.Info.Producer; break;
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case "CreationDate":
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key = Constants.Info.CreationDate;
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goto case "//DecodeDate";
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case "ModDate":
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key = Constants.Info.ModDate;
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goto case "//DecodeDate";
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case "//DecodeDate":
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try {
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val = PdfDate.Decode(val).ToString("yyyy年MM月dd日 HH:mm:ss");
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}
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catch (Exception) {
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continue;
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}
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break;
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}
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w.WriteAttributeString(XmlConvert.EncodeLocalName(key), PdfHelper.GetValidXmlString(val));
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}
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if (_reader.Metadata?.Length > 0) {
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w.WriteStartElement(Constants.Info.MetaData);
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using (MemoryStream ms = new MemoryStream(_reader.Metadata)) {
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var d = new XmlDocument();
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d.Load(ms);
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d.DocumentElement?.WriteContentTo(w);
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}
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w.WriteEndElement();
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}
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}
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w.WriteEndElement();
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}
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internal static void WriteDocumentInfoAttributes(TextWriter w, string sourcePath, int numberOfPages) {
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w.WriteLine("#版本=" + Constants.InfoDocVersion);
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w.WriteLine("#" + Constants.Info.DocumentPath + "=" + sourcePath);
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w.WriteLine("#页数=" + numberOfPages);
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w.WriteLine();
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}
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internal void ExportDocument(TextWriter w) {
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var i = RewriteDocInfoWithEncoding(_reader, AppContext.Encodings.DocInfoEncoding);
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OutlineManager.WriteSimpleBookmarkInstruction(w, Constants.Info.Title, PdfHelper.GetValidXmlString(i.Title));
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OutlineManager.WriteSimpleBookmarkInstruction(w, Constants.Info.Author, PdfHelper.GetValidXmlString(i.Author));
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OutlineManager.WriteSimpleBookmarkInstruction(w, Constants.Info.Subject, PdfHelper.GetValidXmlString(i.Subject));
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OutlineManager.WriteSimpleBookmarkInstruction(w, Constants.Info.Keywords, PdfHelper.GetValidXmlString(i.Keywords));
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OutlineManager.WriteSimpleBookmarkInstruction(w, Constants.Info.Creator, PdfHelper.GetValidXmlString(i.Creator));
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OutlineManager.WriteSimpleBookmarkInstruction(w, Constants.Info.Producer, PdfHelper.GetValidXmlString(i.Producer));
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}
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internal void ExportViewerPreferences(XmlWriter w) {
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var catalog = _reader.Catalog;
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if (catalog.Contains(PdfName.VIEWERPREFERENCES) || catalog.Contains(PdfName.PAGELAYOUT) || catalog.Contains(PdfName.PAGEMODE)) {
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w.WriteStartElement(Constants.ViewerPreferences);
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if (catalog.Contains(PdfName.PAGELAYOUT)) {
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w.WriteAttributeString(Constants.PageLayout,
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ValueHelper.MapValue(catalog.GetAsName(PdfName.PAGELAYOUT), Constants.PageLayoutType.PdfNames,
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Constants.PageLayoutType.Names));
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}
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if (catalog.Contains(PdfName.PAGEMODE)) {
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w.WriteAttributeString(Constants.PageMode,
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ValueHelper.MapValue(catalog.GetAsName(PdfName.PAGEMODE), Constants.PageModes.PdfNames,
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Constants.PageModes.Names));
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}
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if (catalog.Contains(PdfName.VIEWERPREFERENCES)) {
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ExportViewerPreferences(catalog.GetAsDict(PdfName.VIEWERPREFERENCES), w);
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}
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w.WriteEndElement();
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}
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if (!catalog.Contains(PdfName.PAGELABELS)) {
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return;
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}
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var labels = ExtractPageLabels(catalog.GetAsDict(PdfName.PAGELABELS));
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if (labels.Count > 0) {
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w.WriteStartElement(Constants.PageLabels);
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foreach (var item in labels) {
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w.WriteStartElement(Constants.PageLabelsAttributes.Style);
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w.WriteAttributeString(Constants.PageLabelsAttributes.PageNumber, item.PageNumber.ToText());
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if (item.StartPage != 0) {
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w.WriteAttributeString(Constants.PageLabelsAttributes.StartPage, item.StartPage.ToText());
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}
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if (String.IsNullOrEmpty(item.Prefix) == false) {
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w.WriteAttributeString(Constants.PageLabelsAttributes.Prefix, item.Prefix);
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}
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if (String.IsNullOrEmpty(item.Style) == false) {
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w.WriteAttributeString(Constants.PageLabelsAttributes.Style,
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ValueHelper.MapValue(item.Style[0],
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Constants.PageLabelStyles.PdfValues,
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Constants.PageLabelStyles.Names,
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item.Style)
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);
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}
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w.WriteEndElement();
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}
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w.WriteEndElement();
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}
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}
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private static List<PageLabel> ExtractPageLabels(PdfDictionary labels) {
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var a = new List<PageLabel>();
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var ls = labels.GetAsArray(PdfName.NUMS);
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if (ls == null) {
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return new List<PageLabel>();
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}
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for (int i = 0; i < ls.Size; i++) {
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var l = new PageLabel {
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PageNumber = ls.GetAsNumber(i++).IntValue + 1
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};
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var label = ls.GetAsDict(i);
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if (label.Contains(PdfName.ST)) {
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l.StartPage = label.GetAsNumber(PdfName.ST).IntValue;
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}
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if (label.Contains(PdfName.P)) {
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l.Prefix = label.GetAsString(PdfName.P).ToUnicodeString();
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}
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if (label.Contains(PdfName.S)) {
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l.Style = PdfHelper.GetPdfNameString(label.GetAsName(PdfName.S));
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}
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a.Add(l);
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l = null;
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}
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return a;
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}
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internal void ExtractPageSettings(XmlWriter w) {
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int n = _reader.NumberOfPages;
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PageSettings active = null, current;
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int fromP = 1, toP;
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for (int i = 1; i <= n; i++) {
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Tracker.IncrementProgress(1);
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current = PageSettings.FromReader(_reader, i, _options.UnitConverter);
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if (PageSettings.HavingSameDimension(active, current) && i != n) {
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continue;
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}
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if (i == 1) {
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active = current;
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if (n > i) {
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continue;
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}
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}
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toP = i == n ? n : i - 1;
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active.PageRange = (fromP != toP) ? String.Concat(fromP.ToText(), '-', toP.ToText()) : toP.ToText();
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w.WriteStartElement(Constants.Content.Page);
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active.WriteXml(w);
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w.WriteEndElement();
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fromP = i;
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active = current;
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}
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}
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private static void ExportViewerPreferences(PdfDictionary preferences, XmlWriter w) {
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foreach (var item in preferences) {
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var nv = item.Value as PdfName;
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if (item.Key.Equals(PdfName.TYPE)) {
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continue;
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}
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var itemName = ValueHelper.MapValue(item.Key, Constants.ViewerPreferencesType.PdfNames, Constants.ViewerPreferencesType.Names, PdfName.DecodeName(item.Key.ToString()));
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if (nv != null) {
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if (PdfName.DIRECTION.Equals(item.Key)) {
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w.WriteAttributeString(Constants.ViewerPreferencesType.Direction,
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ValueHelper.MapValue(nv, Constants.ViewerPreferencesType.DirectionType.PdfNames,
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Constants.ViewerPreferencesType.DirectionType.Names));
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}
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else {
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w.WriteAttributeString(itemName, PdfHelper.GetPdfFriendlyName(nv));
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}
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}
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else if (item.Value.IsBoolean()) {
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w.WriteAttributeString(
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itemName,
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((PdfBoolean)item.Value).BooleanValue ? Constants.Boolean.True : Constants.Boolean.False
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);
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}
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else {
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w.WriteAttributeString(itemName, item.Value.ToString());
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}
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}
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}
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internal void ExportNamedDestinations(XmlWriter w) {
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var nds = _reader.GetNamedDestination();
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if (nds != null && nds.Count > 0) {
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w.WriteStartElement(Constants.NamedDestination);
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foreach (var item in nds) {
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w.WriteStartElement("位置");
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w.WriteAttributeString(Constants.DestinationAttributes.Name, StringHelper.ReplaceControlAndBomCharacters(item.Key.ToString()));
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_actionExport.ExportGotoAction(item.Value as PdfObject, w, PageReferenceMapper);
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w.WriteEndElement();
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}
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w.WriteEndElement();
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}
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}
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internal void ExportBookmarks(XmlElement bookmarks, TextWriter w, int level, bool isOpen) {
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if (bookmarks == null || bookmarks.HasChildNodes == false) {
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return;
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}
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var childBookmarks = bookmarks.SelectNodes(Constants.Bookmark);
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if (childBookmarks == null || childBookmarks.Count == 0) {
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return;
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}
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string title, page;
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bool open;
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foreach (XmlElement item in childBookmarks) {
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title = item.GetAttribute(Constants.BookmarkAttributes.Title);
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page = item.GetAttribute(Constants.DestinationAttributes.Page);
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open = item.GetAttribute(Constants.BookmarkAttributes.Open) == Constants.Boolean.True;
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if (open != isOpen && item.HasChildNodes) {
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OutlineManager.WriteSimpleBookmarkInstruction(w, "打开书签", open ? "是" : "否");
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isOpen = open;
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}
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if (String.IsNullOrEmpty(title) == false) {
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for (int i = 0; i < level; i++) {
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w.Write('\t');
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}
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w.Write(title.Replace('\n', ' ').Replace('\r', ' '));
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w.Write(SimpleBookmarkPageNumLeader);
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w.WriteLine(page);
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}
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if (childBookmarks != null) {
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level++;
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ExportBookmarks(item, w, level, isOpen);
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level--;
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}
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}
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}
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/// <summary>
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/// 导出 PDF 书签。
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/// </summary>
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/// <param name="bookmarks"></param>
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/// <param name="w"></param>
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internal void ExportBookmarks(XmlElement bookmarks, XmlWriter w) {
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if (bookmarks == null) {
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return;
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}
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foreach (XmlElement child in bookmarks.ChildNodes) {
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if (child == null) {
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continue;
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}
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w.WriteStartElement(Constants.Bookmark);
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foreach (XmlAttribute entry in child.Attributes) {
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var key = entry.Name as string;
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var value = entry.Value ?? String.Empty;
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switch (key) {
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case Constants.Coordinates.Bottom:
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case Constants.Coordinates.Left:
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case Constants.Coordinates.Top:
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case Constants.Coordinates.Right:
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if (String.IsNullOrEmpty(value) || value == "null") {
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continue;
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}
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goto default;
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case Constants.Coordinates.ScaleFactor:
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if (String.IsNullOrEmpty(value)) {
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continue;
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}
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goto default;
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case Constants.BookmarkAttributes.Title:
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w.WriteAttributeString(key, PdfHelper.GetValidXmlString(value));
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break;
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default:
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w.WriteAttributeString(key, value);
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break;
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}
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}
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if (child.ChildNodes.Count > 0) {
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ExportBookmarks(child, w);
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}
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w.WriteEndElement();
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}
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}
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/// <summary>
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/// 导出 PDF 文档页内连接。
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/// </summary>
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/// <param name="r"></param>
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/// <param name="w"></param>
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internal void ExtractPageLinks(XmlWriter w) {
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w.WriteStartElement(Constants.PageLink);
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int numPages = _reader.NumberOfPages;
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for (int i = 1; i <= numPages; i++) {
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var pageDic = _reader.GetPageNRelease(i);
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Tracker.IncrementProgress(1);
|
|
var annots = (PdfArray)PdfReader.GetPdfObject(pageDic.Get(PdfName.ANNOTS));
|
|
if (annots == null) {
|
|
continue;
|
|
}
|
|
var arr = annots.ArrayList;
|
|
foreach (PdfObject item in arr) {
|
|
if (item.IsNull()) {
|
|
continue;
|
|
}
|
|
var annot = (PdfDictionary)PdfReader.GetPdfObjectRelease(item);
|
|
if (PdfName.LINK.Equals(annot.Get(PdfName.SUBTYPE))) {
|
|
w.WriteStartElement(Constants.PageLinkAttributes.Link);
|
|
w.WriteAttributeString(Constants.PageLinkAttributes.PageNumber, i.ToText());
|
|
var rect = annot.GetAsArray(PdfName.RECT);
|
|
if (rect != null && rect.Size == 4) {
|
|
var u = _options.UnitConverter;
|
|
var p = new float[4];
|
|
var k = 0;
|
|
foreach (PdfNumber ri in rect.ArrayList) {
|
|
if (ri == null) {
|
|
break;
|
|
}
|
|
p[k] = u.FromPoint(ri.FloatValue);
|
|
k++;
|
|
}
|
|
if (k == 4) {
|
|
w.WriteAttributeString(Constants.Coordinates.Left, p[0].ToText());
|
|
w.WriteAttributeString(Constants.Coordinates.Bottom, p[1].ToText());
|
|
w.WriteAttributeString(Constants.Coordinates.Right, p[2].ToText());
|
|
w.WriteAttributeString(Constants.Coordinates.Top, p[3].ToText());
|
|
}
|
|
}
|
|
if (annot.Contains(PdfName.BORDER)) {
|
|
w.WriteAttributeString(Constants.PageLinkAttributes.Border, PdfHelper.GetNumericArrayString(annot.GetAsArray(PdfName.BORDER), 1));
|
|
}
|
|
if (annot.Contains(PdfName.C)) {
|
|
ExportColor(annot.GetAsArray(PdfName.C), w);
|
|
}
|
|
if (annot.Contains(PdfName.H)) {
|
|
var style = PdfHelper.GetPdfNameString(annot.GetAsName(PdfName.H));
|
|
style = ValueHelper.MapValue(style,
|
|
new string[] { "N", "I", "O", "P" },
|
|
new string[] { "无", "取反内容", "取反边框", "按下" },
|
|
style
|
|
);
|
|
w.WriteAttributeString(Constants.PageLinkAttributes.Style, style);
|
|
}
|
|
//if (annot.Contains (PdfName.M)) {
|
|
// try {
|
|
// w.WriteAttributeString ("日期", PdfDate.Decode (annot.GetAsString (PdfName.M).ToString ()).ToString ());
|
|
// }
|
|
// catch (Exception) {
|
|
// w.WriteAttributeString ("日期", annot.GetAsString (PdfName.M).ToString ());
|
|
// }
|
|
//}
|
|
if (annot.Contains(PdfName.QUADPOINTS)) {
|
|
w.WriteAttributeString(Constants.PageLinkAttributes.QuadPoints, PdfHelper.GetNumericArrayString(annot.GetAsArray(PdfName.QUADPOINTS), _options.UnitConverter.UnitFactor));
|
|
}
|
|
if (annot.Contains(PdfName.CONTENTS)) {
|
|
w.WriteAttributeString(Constants.PageLinkAttributes.Contents, annot.GetAsString(PdfName.CONTENTS).ToUnicodeString());
|
|
}
|
|
ExportLinkAction(annot, w);
|
|
if (annot.Contains(PdfName.BS)) {
|
|
w.WriteStartElement("边框样式");
|
|
var bs = annot.GetAsDict(PdfName.BS);
|
|
if (bs.Contains(PdfName.W)) {
|
|
w.WriteAttributeString("宽度", bs.GetAsNumber(PdfName.W).FloatValue.ToText());
|
|
}
|
|
if (bs.Contains(PdfName.S)) {
|
|
var style = PdfHelper.GetPdfNameString(bs.GetAsName(PdfName.S));
|
|
style = ValueHelper.MapValue(style,
|
|
new string[] { "S", "U", "D", "B", "I" },
|
|
new string[] { "方框", "下划线", "虚线", "凸起", "凹陷" },
|
|
style
|
|
);
|
|
w.WriteAttributeString("样式", style);
|
|
if (PdfName.D.Equals(bs.GetAsName(PdfName.S)) && bs.Contains(PdfName.D)) {
|
|
w.WriteAttributeString("线型", PdfHelper.GetArrayString(bs.GetAsArray(PdfName.D)));
|
|
}
|
|
}
|
|
w.WriteEndElement();
|
|
}
|
|
w.WriteEndElement();
|
|
}
|
|
}
|
|
}
|
|
w.WriteEndElement();
|
|
}
|
|
|
|
internal static void ExportColor(PdfArray color, XmlWriter target) {
|
|
if (color == null) {
|
|
return;
|
|
}
|
|
switch (color.Size) {
|
|
case 0:
|
|
target.WriteAttributeString(Constants.Color, Constants.Colors.Transparent);
|
|
break;
|
|
case 1:
|
|
target.WriteAttributeString(Constants.Colors.Gray, color.GetAsNumber(0).FloatValue.ToText());
|
|
break;
|
|
case 3:
|
|
target.WriteAttributeString(Constants.Colors.Red, color.GetAsNumber(0).FloatValue.ToText());
|
|
target.WriteAttributeString(Constants.Colors.Green, color.GetAsNumber(1).FloatValue.ToText());
|
|
target.WriteAttributeString(Constants.Colors.Blue, color.GetAsNumber(2).FloatValue.ToText());
|
|
break;
|
|
case 4:
|
|
target.WriteAttributeString(Constants.Colors.Cyan, color.GetAsNumber(0).FloatValue.ToText());
|
|
target.WriteAttributeString(Constants.Colors.Magenta, color.GetAsNumber(1).FloatValue.ToText());
|
|
target.WriteAttributeString(Constants.Colors.Yellow, color.GetAsNumber(2).FloatValue.ToText());
|
|
target.WriteAttributeString(Constants.Colors.Black, color.GetAsNumber(3).FloatValue.ToText());
|
|
break;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// 导出 PDF 文档的单个连接信息。
|
|
/// </summary>
|
|
/// <param name="link"></param>
|
|
/// <param name="w"></param>
|
|
void ExportLinkAction(PdfDictionary link, XmlWriter w) {
|
|
var dest = PdfReader.GetPdfObjectRelease(link.Get(PdfName.DEST));
|
|
|
|
w.WriteStartElement(Constants.PageLinkAttributes.LinkAction);
|
|
|
|
if (dest != null) {
|
|
_actionExport.ExportGotoAction(dest, w, PageReferenceMapper);
|
|
}
|
|
else {
|
|
_actionExport.ExportAction((PdfDictionary)PdfReader.GetPdfObjectRelease(link.Get(PdfName.A)), PageReferenceMapper, w);
|
|
}
|
|
w.WriteEndElement();
|
|
}
|
|
|
|
}
|
|
}
|