// Read one HTML page and return a slide show
public SlideShow ReadSlideShow(string aSlideFile, out string aDiagnostic)
{
aDiagnostic = null;
// Determine the name of the future XML slide show file
string xmlFilePath = aSlideFile.Replace(".htm", ".xml");
SlideShow slideShow = new SlideShow(xmlFilePath);
//Console.WriteLine(" HtmlReader ReadSlideShow: parsing " + aSlideFile);
string html = ReadFile(aSlideFile);
if (html == null)
{
aDiagnostic = "ReadSlideShow: bad HTML slideshow file " + aSlideFile;
return(null);
}
else
{
ParseHTML parse = new ParseHTML();
parse.Source = html;
HtmlPreprocess htmlPreprocess = new HtmlPreprocess();
// Default overall title for the slide show, hopefully replaced with something better
string title = "A most peculiar day";
bool collectingTitle = false;
bool collectingCaption = false;
Caption caption = new Caption();
string link = "";
while (!parse.Eof())
{
char ch = parse.Parse();
if (ch == 0)
{
AttributeList tag = parse.GetTag();
if (tag.Name.Equals("title", StringComparison.CurrentCultureIgnoreCase))
{
collectingTitle = true; // Start collecting title
title = string.Empty;
}
else if (tag.Name.Equals("/title", StringComparison.CurrentCultureIgnoreCase))
{
collectingTitle = false; // Title now complete
slideShow.Title = title.Trim();
}
if (tag.Name.Equals("td", StringComparison.CurrentCultureIgnoreCase))
{
collectingCaption = true; // Start collecting new caption
caption = new Caption();
}
else if (tag.Name.Equals("/td", StringComparison.CurrentCultureIgnoreCase))
{
collectingCaption = false; // Any caption is now complete
if (!link.Equals(""))
{
// Got a link to go with the caption
slideShow.Add(link, caption);
link = "";
}
}
else if (collectingCaption &&
tag.Name.Equals("p", StringComparison.CurrentCultureIgnoreCase))
{
// HTML paragraph tag within caption
caption.NewLine();
}
else if (tag["href"] != null)
{
string href = tag["href"].Value.Replace('/', '\\');
if (IsPhoto(href))
{
//Console.WriteLine(" + HtmlReader ReadSlideShow: add " + href +
// " from tag " + tag.Name);
link = href;
}
}
// Preprocessing of regular character stream starts with clean sheet after tag
htmlPreprocess.Reset();
}
else
{
// Got a character
ch = htmlPreprocess.Add(ch);
if (ch != HtmlPreprocess.NullChar)
{
if (collectingTitle)
{
title += ch;
}
else if (collectingCaption)
{
caption.AddChar(ch);
}
}
}
}
return(slideShow);
}
}
// Read one HTML page and return an Event list
public EventList ReadEvents(string aEventsFile, out string aDiagnostic)
{
aDiagnostic = null;
string xmlFilePath = aEventsFile.Replace(".htm", ".xml");
EventList events = new EventList(xmlFilePath);
string html = ReadFile(aEventsFile);
if (html == null)
{
aDiagnostic = "ReadEvents: bad HTML Events file " + aEventsFile;
return(null);
}
else
{
// Determine the events directory
string eventsDirectory = GetDirectory(aEventsFile);
//Console.WriteLine(" HtmlReader ReadEvents: parsing " + aEventsFile);
ParseHTML parse = new ParseHTML();
parse.Source = html;
HtmlPreprocess htmlPreprocess = new HtmlPreprocess();
string name = ""; // Collect stream of characters in HTML source
int indent = 0;
SlideShow slideShow = null; // Collect slide show from href
while (!parse.Eof())
{
char ch = parse.Parse();
if (ch == 0)
{
AttributeList tag = parse.GetTag();
if (tag.Name.Equals("h2", StringComparison.CurrentCultureIgnoreCase))
{
// Start collecting title
name = "";
indent = 0;
}
else if (tag.Name.Equals("/h2", StringComparison.CurrentCultureIgnoreCase))
{
// Title is now complete
events.Title = name.Trim();
name = "";
indent = 0;
}
else if ((tag.Name.Equals("p", StringComparison.CurrentCultureIgnoreCase)) ||
(tag.Name.Equals("br", StringComparison.CurrentCultureIgnoreCase)) ||
(tag.Name.Equals("hr", StringComparison.CurrentCultureIgnoreCase)))
{
// End of line, check whether we have an event
if (name.Length > 0)
{
// Use indent as the level for now
events.Add(indent, name.Trim(), slideShow);
}
// Reset for next event
name = "";
indent = 0;
slideShow = null;
}
else if (tag["href"] != null)
{
string href = tag["href"].Value.Replace('/', '\\');
//Console.WriteLine(" + HtmlReader ReadEvents: add event " + href + " to events XML file");
// Strip any anchor: we cannot handle it
if (href.Contains('#'))
{
href = href.Remove(href.IndexOf('#'));
}
// Process child events file
slideShow = ReadSlideShow(eventsDirectory + href, out aDiagnostic);
if (slideShow == null)
{
return(null);
}
}
// Preprocessing of regular character stream starts with clean sheet after tag
htmlPreprocess.Reset();
}
else
{
// Preprocess
ch = htmlPreprocess.Add(ch);
if (ch == HtmlPreprocess.NullChar)
{
// Nothing to do
continue;
}
else if (ch.Equals(' '))
{
if (name.Length == 0)
{
// Leading space: count the indent
indent++;
}
else
{
// Count all non-leading spaces returned by the preprocessor
name += ch;
}
}
else if (ch.Equals('+'))
{
if (name.Length == 0)
{
// Initial plus marks a subevent - count it in the indent
indent++;
}
else
{
// Transcribe other plus symbols into the event name
name += ch;
}
}
else
{
// Add regular character
name += ch;
}
}
}
// End of event list, check for any outstanding event
if (name.Length > 0)
{
events.Add(indent, name.Trim(), slideShow);
}
// The event levels were arbitrarily set as a measure of the indentation
// of each event name in the HTML. Reassign sequential levels.
events.Relevel();
return(events);
}
}
