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//############################################################################
// XML Literals
//############################################################################
// $Id$
import scala.testing.UnitTest._ ;
import scala.xml._ ;
import scala.collection.immutable ;
object Test {
val e = Node.NoAttributes;
/* a helper function to compare up to whitespace */
def noWS(x:String):String = {
val res = new StringBuffer();
var i = 0; while( i < x.length() ) {
val c = x.charAt( i );
c match {
case ' ' | '\n' | '\t' =>
case _ => res.append( c )
}
i = i + 1;
}
res.toString();
}
object Test01Literals {
/* === tags, elements === */
assertEquals( <hello></hello>.toString(),
<hello ></hello>.toString()); /* ws in tags */
assertEquals( <hello></hello>.toString(),
noWS(<hello > </hello>.toString()));
val xx3 = <hello>
<world></world>
<test/>
<mars></mars></hello>;
val x3 = xx3.toString(); /* ws in element content */
//Console.println("tmp1:"+x3);
//Console.println("tmp2:"+Elem(null,"mars",e,TopScope).toString() );
assertEquals( noWS( x3 ),
Elem(null,"hello",e,TopScope,
Elem(null,"world",e,TopScope),
Elem(null,"test",e,TopScope),
Elem(null,"mars",e,TopScope)).toString() );
Console.println("ws trimming in patterns");
assertEquals( true, <hello> <world/> </hello> match {
case <hello> <world/> </hello> => true;
case _ => false;} );
/* === attributes === */
val z = <html>
<body background="#FFFFFF">
<h1>Hello World</h1>
<p>Check the <a href="scala.epfl.ch">scala</a> page!</p>
</body>
</html>.toString();
assertEquals( noWS( z ), noWS(
Elem(null,"html",e,TopScope,
Elem(null,"body",e,TopScope,
Elem(null,"h1",e,TopScope,Text("Hello World")),
Elem(null,"p",e,TopScope,Text("Check the "),
Elem(null,"a", e,TopScope,Text("scala"))
% (new UnprefixedAttribute("href","scala.epfl.ch",Null)),
Text("page!"))
) % new UnprefixedAttribute("background","#FFFFFF",Null)
).toString()
));
/* === attributes are Scala expr === */
val testValue = "This is a test.";
val testValue2 = 42;
val page = <testTag value={ testValue } ab="bkla" />;
val page2 = <testTag value={testValue2.toString()} bla="foo"></testTag>;
Console.println( page.toString() );
Console.println( page2.toString() );
}
object Test02Embed {
/* === embedded Scala blocks === */
def computeDate() = {
Elem(null,"date", e, TopScope, Text("now!"));
}
/* embedding Scala strings as text and elements */
val sc = <hello>{ "World" }{ Text("42") }{ computeDate() }</hello>;
assertEquals( sc.child.elements.toList,
List( Text("World"), Text("42"), Elem(null, "date", e,TopScope, Text("now!") ) ) );
assertEquals( sc.toString(),
Elem(null,"hello",e,TopScope,Text("World42"),Elem(null,"date",e,TopScope, Text("now!"))).toString() );
def foo( m:Node ):String = m match {
case <hello/> => "hello node"
case <hallo ></hallo > => "hallo node"
case <test>{ z }</test> => "test node:"+z
case <list>{ e1:Node }{ e2:Node }{ _* }</list> => e1.toString() + e2.toString();
}
assertEquals( foo(<hello/>), "hello node" );
assertEquals( foo(<hallo/>), "hallo node" );
assertEquals( foo(<test>42</test>), "test node:42" );
assertEquals( foo(<list><a/><b><c/></b><d/><d/></list>),
<a/>.toString() + <b><c/></b>.toString() );
val rows = <tr>
<td>1.1</td><td>1.2</td>
</tr>
<tr>
<td>2.1</td><td>2.2</td>
</tr>;
assertEquals( noWS( rows.toList.toString() ),
noWS( List(Elem(null,"tr",e,TopScope,
Elem(null,"td",e,TopScope,Text("1.1")),Elem(null,"td",e,TopScope, Text("1.2"))
),
Elem(null,"tr",e,TopScope,
Elem(null,"td",e,TopScope,Text("2.1")),Elem(null,"td",e,TopScope,Text("2.2"))
)
).toString() )
);
val rows2 = <tr><!-- an XML comment --><?pinotext?><?pi text?></tr>;
val rows3 = <tr> a <!-- an XML comment --> b <?pinotext?> c <?pi text?> d </tr>;
// these are not equal as comments are valid XML Info items.
assertEquals( rows2, Elem(null,"tr",e,TopScope,Comment(" an XML comment "),ProcInstr("pinotext",""),ProcInstr("pi","text")));
assertEquals( rows3, Elem(null,"tr",e,TopScope,Text("a"),Comment(" an XML comment "),Text("b"),ProcInstr("pinotext",""),Text("c"),ProcInstr("pi","text"),Text("d")));
}
object Test03Servlet {
val headerMsg = Text("What follows is an example of modular formatting.");
val footerMsg = Text("Complicated layout tasks can be encapsulated and outsourced.");
/** helper function for the main page, provides header and a footer
*/
def page( ns:Seq[Node] ) = {
<html>
<head>
<title>ModularFormatting</title>
</head>
<body>
<h2>Welcome</h2>
<p>
{headerMsg }
</p>
<p>
{ ns }
</p>
<p>
{ 1 } {'a'} { 23.23 }
</p>
<p>
{ for(val n <- ns.toList) yield { n::n::Nil } }
</p>
<hr/>
<p>
{footerMsg}
</p>
<h2>Bye!</h2>
</body>
</html>
}
/** applies beautify to every element in a sequence
*/
def beautify( xs:Seq[Node] ):Seq[Node] = xs.toList.map { beautify }
/** this is a recursive procedure that adds some attributes to the tree
*/
def beautify( n:Node ):Node = n match {
case <td>{xs @ _* }</td> =>
<td bgcolor="#AAAAFF" color="#222255">{ xs }</td>
case <table>{ xs @ _* }</table> =>
<table align="center">{ beautify( xs )}</table>
case Elem(null, label, _, _, xs @ _* ) =>
new Elem(null, label, e, TopScope, beautify( xs ):_*)
case _ => n
}
/** this function will take a node and put it in a table
*/
def format( msg:Node ):Node = {
<table>
<tr>
<td>{ msg }</td>
</tr>
</table>
}
/** returns a highlighted text node with the string given as arguemnt. if it
* is null, supplies a default string.
*/
def getMessage( x:String ) = {
if( x == null )
<h1> This could be YOUR message ! </h1>
else
<h1> { Text( x ) } </h1>
}
/** the entry method
*/
def doGetXML() = {
beautify( page( List( format( getMessage( "message" ) )) ));
//page( List( format( theMessage )));
}
def main( args:Array[String] ) = {
val x = doGetXML();
Console.println( x );
Console.println( new PrettyPrinter( 80, 2 ).format( x ));
}
}
object Test04 {
val sequence = <foo/>
<bar>Text</bar>
<foo/>;
Console.println( sequence );
val onlyOne = <foo/>;
Console.println( onlyOne );
val tryBrace = <try>Now escaped {{ braces } </try>;
assertEquals( tryBrace, Elem(null,"try",e,TopScope,Text("Now escaped { braces }")));
val tryBrace2 = <try myAttrib={(3+4).toString() }> cool ?</try>;
assertEquals( tryBrace2.attribute("myAttrib"), "7" );
/* Scala comments are not allowed in XML literals. see neg(2) */
val zzz = <hello>/* no comment */</hello>;
assertEquals( zzz, Elem(null,"hello", e,TopScope, Text("/* no comment */")));
}
def test05main = {
val x1s = <foo>{</foo>.toString();
Console.println( x1s );
val x2 = <foo> {<bar><baz/></bar><bar/></foo>.toString();
Console.println( x2 );
}
def test06 = {
val foo =
<bar:foo xmlns:bar="www.bar.com" xmlns="www.baz.com">
<baz/>
</bar:foo>;
Console.println( foo );
}
def main( args:Array[String] ):Unit = {
Console.println("Test01Literals");
Test01Literals;
Console.println("Test02Embed");
Test02Embed;
Console.println("Test03Servlet");
Test03Servlet.main( args );
Console.println("Test04");
Test04;
Console.println("Test05Ref");
test05main;
Console.println("namespace");
test06;{
}
}
}
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