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HtmlGenerator.cs
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HtmlGenerator.cs
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using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml;
namespace ScribdMpubToEpubConverter
{
public sealed class UTF8StringWriter : StringWriter
{
public override Encoding Encoding
{
get { return Encoding.UTF8; }
}
}
struct HtmlTableColumn
{
public string Text { get; set; }
public string Style { get; set; }
}
struct HtmlAttribute
{
public string LocalName { get; set; }
public string Value { get; set; }
}
class HtmlGenerator
{
private XmlWriter Writer { get; set; }
public HtmlGenerator(XmlWriter writer, string title)
{
Writer = writer;
/*
* <?xml version="1.0" encoding="utf-8" standalone="no"?>
*/
Writer.WriteStartDocument(false);
/*
* <!DOCTYPE html
* PUBLIC
* "-//W3C//DTD XHTML 1.1//EN"
* "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
*/
Writer.WriteDocType("html", "-//W3C//DTD XHTML 1.1//EN", "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd", null);
/*
* <html>
*/
Writer.WriteStartElement("html", "http://www.w3.org/1999/xhtml");
/*
* <head>
*/
Writer.WriteStartElement("head");
/*
* <link href="../Styles/style.css" rel="stylesheet" type="text/css"/>
*/
var styles_relative_path = EPUB2.EpubDirectories.OEBPS_Styles.Replace(
EPUB2.EpubDirectories.OEBPS,
"../"
);
Writer.WriteStartElement("link");
Writer.WriteAttributeString("href", styles_relative_path + "style.css");
Writer.WriteAttributeString("rel", "stylesheet");
Writer.WriteAttributeString("type", "text/css");
Writer.WriteEndElement();
/*
* <title>@title</title>
*/
Writer.WriteElementString("title", title);
Writer.WriteEndElement();
/*
* <body>
*/
Writer.WriteStartElement("body");
}
public void AddImage(string filename, string alt, bool should_center)
{
/*
* <div @should_center>
* <img src="../Images/@filename" alt="@alt" height="100%" />
* </div>
*/
Writer.WriteStartElement("div");
// Center image if needed
if (should_center)
Writer.WriteAttributeString("style", "text-align: center;");
Writer.WriteStartElement("img");
Writer.WriteAttributeString("src", "../Images/" + filename);
Writer.WriteAttributeString("alt", alt);
Writer.WriteAttributeString("height", "100%");
Writer.WriteEndElement();
Writer.WriteEndElement();
}
public void AddText(string element, string content, params HtmlAttribute[] attributes)
{
/*
* <@element @attributes...>@content</@element>
*/
Writer.WriteStartElement(element);
if (attributes != null)
{
foreach (var attribute in attributes)
{
// HACK! Don't add attributes with empty names.
if (attribute.LocalName == null)
continue;
Writer.WriteAttributeString(attribute.LocalName, attribute.Value);
}
}
Writer.WriteString(content);
Writer.WriteEndElement();
}
// NOTE: Only the attribute with the LocalName "href" will
// be added to the <a> element, all other will be added to the <p> element.
public void AddLink(string content, params HtmlAttribute[] attributes)
{
/*
* <p @attributes...>
* <a @attributes["href"]>@content</a>
* </p>
*/
Writer.WriteStartElement("p");
if (attributes != null)
{
foreach (var attribute in attributes)
{
// HACK! Don't add attributes with empty names.
if (attribute.LocalName == null)
continue;
// Don't add href attribute to <p>
if (attribute.LocalName == "href")
continue;
Writer.WriteAttributeString(attribute.LocalName, attribute.Value);
}
}
Writer.WriteStartElement("a");
if (attributes != null)
{
foreach (var attribute in attributes)
{
// HACK! Don't add attributes with empty names.
if (attribute.LocalName == null)
continue;
// Add only href attribute to <a>
if (attribute.LocalName != "href")
continue;
Writer.WriteAttributeString(attribute.LocalName, attribute.Value);
}
}
Writer.WriteString(content);
Writer.WriteEndElement();
Writer.WriteEndElement();
}
public void AddPageBreak()
{
/*
* <div style="page-break-before: always;" />
*/
Writer.WriteStartElement("div");
Writer.WriteAttributeString("style", "page-break-before: always;");
Writer.WriteEndElement();
}
public void AddBorder(double width, string style)
{
/*
* <div style="@style_attribute" />
*/
var style_attribute = "border-style: " + style +
"; border-color: rgb(0, 0, 0); border-top-width: 1px; width: " +
width.ToString() + ";";
Writer.WriteStartElement("div");
Writer.WriteAttributeString("style", style_attribute);
Writer.WriteEndElement();
}
public void AddHorizontalRule()
{
/*
* <hr/>
*/
Writer.WriteStartElement("hr");
Writer.WriteEndElement();
}
public void AddSpacer(double size)
{
/*
* <br @size;"/>
*/
Writer.WriteStartElement("br");
if (size != 1)
Writer.WriteAttributeString("style", "line-height: " + size);
Writer.WriteEndElement();
}
public void StartTable(int column_count)
{
/*
* <table style="@TableStyle">
* <colgroup>
* ...
* <col width="@average_colum_width@ />
* ...
* </colgroup>
*/
const string TableStyle = "table-layout: fixed; white-space: nowrap; border-collapse: collapse; border-spacing: 0px; margin: 5% auto;";
// Calculate average width in procentage
var average_column_width = 100.0 / column_count;
Writer.WriteStartElement("table");
Writer.WriteAttributeString("style", TableStyle);
Writer.WriteStartElement("colgroup");
for (int i = 0; i < column_count; ++i)
{
Writer.WriteStartElement("col");
Writer.WriteAttributeString("width", average_column_width.ToString("0.##") + "%");
Writer.WriteEndElement();
}
Writer.WriteEndElement();
}
public void AddTableRow(List<HtmlTableColumn> columns)
{
/*
* <tr>
* ...
* <td style="@column.Style">@column.Text</td>
* ...
* </tr>
*/
Writer.WriteStartElement("tr");
foreach (var column in columns)
{
Writer.WriteStartElement("td");
// Set style attribute, if there is a style present
if (column.Style != null)
Writer.WriteAttributeString("style", column.Style);
Writer.WriteString(column.Text);
Writer.WriteEndElement();
}
Writer.WriteEndElement();
}
public void EndTable()
{
/*
* </table>
*/
Writer.WriteEndElement();
AddPageBreak();
}
}
}