/* Title: Pure/Thy/html.scala
Author: Makarius
HTML presentation elements.
*/
package isabelle
object HTML
{
/* encode text with control symbols */
val control =
Map(
Symbol.sub -> "sub",
Symbol.sub_decoded -> "sub",
Symbol.sup -> "sup",
Symbol.sup_decoded -> "sup",
Symbol.bold -> "b",
Symbol.bold_decoded -> "b")
def output(text: String, s: StringBuilder)
{
def output_char(c: Char) =
c match {
case '<' => s ++= "<"
case '>' => s ++= ">"
case '&' => s ++= "&"
case '"' => s ++= """
case '\'' => s ++= "'"
case '\n' => s ++= "<br/>"
case _ => s += c
}
def output_chars(str: String) = str.iterator.foreach(output_char(_))
var ctrl = ""
for (sym <- Symbol.iterator(text)) {
if (control.isDefinedAt(sym)) ctrl = sym
else {
control.get(ctrl) match {
case Some(elem) if Symbol.is_controllable(sym) && sym != "\"" =>
s ++= ("<" + elem + ">")
output_chars(sym)
s ++= ("</" + elem + ">")
case _ =>
output_chars(ctrl)
output_chars(sym)
}
ctrl = ""
}
}
output_chars(ctrl)
}
def output(text: String): String = Library.make_string(output(text, _))
/* output XML as HTML */
def output(body: XML.Body, s: StringBuilder)
{
def attrib(p: (String, String)): Unit =
{ s ++= " "; s ++= p._1; s ++= "=\""; output(p._2, s); s ++= "\"" }
def elem(markup: Markup): Unit =
{ s ++= markup.name; markup.properties.foreach(attrib) }
def tree(t: XML.Tree): Unit =
t match {
case XML.Elem(markup, Nil) =>
s ++= "<"; elem(markup); s ++= "/>"
case XML.Elem(markup, ts) =>
s ++= "<"; elem(markup); s ++= ">"
ts.foreach(tree)
s ++= "</"; s ++= markup.name; s ++= ">"
case XML.Text(txt) => output(txt, s)
}
body.foreach(tree)
}
def output(body: XML.Body): String = Library.make_string(output(body, _))
def output(tree: XML.Tree): String = output(List(tree))
/* markup operators */
type Operator = XML.Body => XML.Elem
val chapter: Operator = XML.elem("h1", _)
val section: Operator = XML.elem("h2", _)
val subsection: Operator = XML.elem("h3", _)
val subsubsection: Operator = XML.elem("h4", _)
val paragraph: Operator = XML.elem("h5", _)
val subparagraph: Operator = XML.elem("h6", _)
/* document */
def begin_document(title: String): String =
"<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n" +
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" " +
"\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n" +
"<html xmlns=\"http://www.w3.org/1999/xhtml\">\n" +
"<head>\n" +
"<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\"/>\n" +
"<title>" + output(title + " (" + Distribution.version + ")") + "</title>\n" +
"<link media=\"all\" rel=\"stylesheet\" type=\"text/css\" href=\"isabelle.css\"/>\n" +
"</head>\n" +
"\n" +
"<body>\n" +
"<div class=\"head\">" +
"<h1>" + output(title) + "</h1>\n"
val end_document = "\n</div>\n</body>\n</html>\n"
/* common markup elements */
private def session_entry(entry: (String, String)): String =
{
val (name, description) = entry
val descr =
if (description == "") Nil
else List(XML.elem("br"), XML.elem("pre", List(XML.Text(description))))
XML.string_of_tree(
XML.elem("li",
List(XML.Elem(Markup("a", List(("href", name + "/index.html"))),
List(XML.Text(name)))) ::: descr)) + "\n"
}
def chapter_index(chapter: String, sessions: List[(String, String)]): String =
{
begin_document("Isabelle/" + chapter + " sessions") +
(if (sessions.isEmpty) ""
else "<div class=\"sessions\"><ul>\n" + sessions.map(session_entry(_)).mkString + "</ul>") +
end_document
}
}