private void AppendToLine(PictureToken token)
{
var imageTokenBlock = new ImageTokenBlock
{
ImageID = token.ImageID,
FirstTokenID = _firstTokenID,
LastTokenID = token.ID
};
_output.Enqueue(imageTokenBlock);
_firstTokenID = token.ID + 1;
}
private IEnumerable <TokenBase> ParseNodes(HtmlNode container, Stack <TextVisualProperties> propertiesStack, TokenIndex top, EpubPath path, int parentID = -1)
{
foreach (HtmlNode child in container.ChildNodes)
{
var asText = child as HtmlTextNode;
if (asText != null && !string.IsNullOrEmpty(asText.Text))
{
foreach (TokenBase text in ParseText(asText.Text, top))
{
yield return(text);
}
}
else
{
TextVisualProperties properties = propertiesStack.Peek().Clone().Update(child, _css);
properties.LinkID = string.Empty;
if (child.Name == "a" || child.Name == "span")
{
ParseAnchors(top, path, child);
}
if (child.Name == "a")
{
string href = child.GetAttributeValue("href", string.Empty);
if (!string.IsNullOrEmpty(href))
{
if (href.StartsWith("#"))
{
properties.LinkID = path.CurrentFilePath + href;
}
else
{
properties.LinkID = path + href;
}
}
}
if (string.Equals(child.Name, "img"))
{
HtmlAttributeCollection attributes = child.Attributes;
string src = attributes.Contains("src") ? attributes["src"].Value : string.Empty;
var pictureToken = new PictureToken(top.Index++, (path) + src);
yield return(pictureToken);
}
else
{
if (child is HtmlCommentNode)
{
continue;
}
var tagOpenToken = new TagOpenToken(top.Index++, child, properties, parentID);
yield return(tagOpenToken);
propertiesStack.Push(properties);
foreach (TokenBase token in ParseNodes(child, propertiesStack, top, path, tagOpenToken.ID))
{
yield return(token);
}
propertiesStack.Pop();
yield return(new TagCloseToken(top.Index++, parentID));
}
}
}
}
private IEnumerable <TokenBase> ParseNodes(XContainer container, Stack <TextVisualProperties> propertiesStack, TokenIndex top, int bookLevel, int parentID = -1)
{
foreach (XNode node in container.Nodes())
{
var text = node as XText;
if ((text != null) && !string.IsNullOrEmpty(text.Value))
{
foreach (TokenBase token in ParseText(text.Value, top))
{
yield return(token);
}
}
var element = node as XElement;
if (element == null)
{
continue;
}
TextVisualProperties properties = propertiesStack.Peek().Clone().Update(element, _styleSheet);
string localName = element.Name.LocalName;
int level = bookLevel;
if (localName == "a")
{
ProcessLinks(properties, element);
}
ProcessAnchors(top, element);
if (localName == "section")
{
yield return(new NewPageToken(top.Index++));
level++;
}
if (localName == "title")
{
ProcessTitleData(top, element, level);
}
if (localName == "image")
{
XAttribute hrefAttr = element.Attributes().FirstOrDefault(t => (t.Name.LocalName == "href"));
string href = ((hrefAttr != null) ? hrefAttr.Value : string.Empty).TrimStart('#');
var pictureToken = new PictureToken(top.Index++, href);
yield return(pictureToken);
}
else
{
var tagOpen = new TagOpenToken(top.Index++, element, properties, parentID);
yield return(tagOpen);
propertiesStack.Push(properties);
foreach (TokenBase token in ParseNodes(element, propertiesStack, top, level, tagOpen.ID))
{
yield return(token);
}
propertiesStack.Pop();
yield return(new TagCloseToken(top.Index++, parentID));
}
}
}
