244 lines
9.3 KiB
C#
244 lines
9.3 KiB
C#
#region MigraDoc - Creating Documents on the Fly
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//
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// Authors:
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// Stefan Lange
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// Klaus Potzesny
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// David Stephensen
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//
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// Copyright (c) 2001-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://www.migradoc.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System.Collections.Generic;
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namespace MigraDoc.DocumentObjectModel.Visitors
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{
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/// <summary>
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/// Flattens a document for PDF rendering.
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/// </summary>
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public class PdfFlattenVisitor : VisitorBase
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{
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/// <summary>
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/// Initializes a new instance of the PdfFlattenVisitor class.
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/// </summary>
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public PdfFlattenVisitor()
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{
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//this .docObject = documentObject;
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}
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public override void VisitDocumentElements(DocumentElements elements)
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{
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#if true
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// New version without sorted list
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int count = elements.Count;
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for (int idx = 0; idx < count; ++idx)
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{
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Paragraph paragraph = elements[idx] as Paragraph;
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if (paragraph != null)
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{
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Paragraph[] paragraphs = paragraph.SplitOnParaBreak();
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if (paragraphs != null)
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{
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foreach (Paragraph para in paragraphs)
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{
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elements.InsertObject(idx++, para);
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++count;
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}
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elements.RemoveObjectAt(idx--);
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--count;
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}
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}
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}
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#else
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SortedList splitParaList = new SortedList();
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for (int idx = 0; idx < elements.Count; ++idx)
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{
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Paragraph paragraph = elements[idx] as Paragraph;
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if (paragraph != null)
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{
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Paragraph[] paragraphs = paragraph.SplitOnParaBreak();
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if (paragraphs != null)
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splitParaList.Add(idx, paragraphs);
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}
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}
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int insertedObjects = 0;
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for (int idx = 0; idx < splitParaList.Count; ++idx)
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{
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int insertPosition = (int)splitParaList.GetKey(idx);
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Paragraph[] paragraphs = (Paragraph[])splitParaList.GetByIndex(idx);
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foreach (Paragraph paragraph in paragraphs)
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{
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elements.InsertObject(insertPosition + insertedObjects, paragraph);
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++insertedObjects;
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}
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elements.RemoveObjectAt(insertPosition + insertedObjects);
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--insertedObjects;
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}
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#endif
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}
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public override void VisitDocumentObjectCollection(DocumentObjectCollection elements)
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{
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List<int> textIndices = new List<int>();
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if (elements is ParagraphElements)
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{
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for (int idx = 0; idx < elements.Count; ++idx)
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{
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if (elements[idx] is Text)
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textIndices.Add(idx);
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}
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}
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int[] indices = (int[])textIndices.ToArray();
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if (indices != null)
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{
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int insertedObjects = 0;
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foreach (int idx in indices)
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{
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Text text = (Text)elements[idx + insertedObjects];
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string currentString = "";
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foreach (char ch in text.Content)
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{
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// TODO Add support for other breaking spaces (en space, em space, &c.).
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switch (ch)
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{
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case ' ':
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case '\r':
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case '\n':
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case '\t':
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if (currentString != "")
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{
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elements.InsertObject(idx + insertedObjects, new Text(currentString));
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++insertedObjects;
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currentString = "";
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}
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elements.InsertObject(idx + insertedObjects, new Text(" "));
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++insertedObjects;
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break;
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case '-': // minus.
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elements.InsertObject(idx + insertedObjects, new Text(currentString + ch));
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++insertedObjects;
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currentString = "";
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break;
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// Characters that allow line breaks without indication.
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case '\u200B': // zero width space.
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case '\u200C': // zero width non-joiner.
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if (currentString != "")
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{
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elements.InsertObject(idx + insertedObjects, new Text(currentString));
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++insertedObjects;
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currentString = "";
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}
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break;
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case '<27>': // soft hyphen.
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if (currentString != "")
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{
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elements.InsertObject(idx + insertedObjects, new Text(currentString));
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++insertedObjects;
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currentString = "";
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}
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elements.InsertObject(idx + insertedObjects, new Text("<22>"));
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++insertedObjects;
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//currentString = "";
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break;
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default:
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currentString += ch;
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break;
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}
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}
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if (currentString != "")
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{
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elements.InsertObject(idx + insertedObjects, new Text(currentString));
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++insertedObjects;
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}
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elements.RemoveObjectAt(idx + insertedObjects);
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--insertedObjects;
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}
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}
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}
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public override void VisitFormattedText(FormattedText formattedText)
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{
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Document document = formattedText.Document;
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ParagraphFormat format = null;
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Style style = document._styles[formattedText._style.Value];
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if (style != null)
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format = style._paragraphFormat;
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else if (formattedText._style.Value != "")
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format = document._styles[StyleNames.InvalidStyleName]._paragraphFormat;
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if (format != null)
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{
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if (formattedText._font == null)
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formattedText.Font = format._font.Clone();
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else if (format._font != null)
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FlattenFont(formattedText._font, format._font);
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}
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Font parentFont = GetParentFont(formattedText);
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if (formattedText._font == null)
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formattedText.Font = parentFont.Clone();
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else if (parentFont != null)
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FlattenFont(formattedText._font, parentFont);
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}
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public override void VisitHyperlink(Hyperlink hyperlink)
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{
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Font styleFont = hyperlink.Document.Styles[StyleNames.Hyperlink].Font;
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if (hyperlink._font == null)
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hyperlink.Font = styleFont.Clone();
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else
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FlattenFont(hyperlink._font, styleFont);
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FlattenFont(hyperlink._font, GetParentFont(hyperlink));
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}
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protected Font GetParentFont(DocumentObject obj)
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{
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DocumentObject parentElements = DocumentRelations.GetParent(obj);
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DocumentObject parentObject = DocumentRelations.GetParent(parentElements);
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Font parentFont;
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Paragraph paragraph = parentObject as Paragraph;
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if (paragraph != null)
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{
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ParagraphFormat format = paragraph.Format;
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parentFont = format._font;
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}
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else // Hyperlink or FormattedText
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{
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parentFont = parentObject.GetValue("Font") as Font;
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}
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return parentFont;
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}
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}
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}
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