import java.io.StringWriter;
import java.io.Writer;
import java.io.IOException;
+import java.io.FileNotFoundException;
import java.util.*;
import org.ibex.util.*;
import org.ibex.js.*;
public class Template extends JSElement {
- public static Template parse(String path, Template.Scope s) throws IOException {
+ public static Template parse(String path, Template.Scope s) throws FileNotFoundException, IOException {
Reader xmlreader = new BufferedReader(new InputStreamReader(new FileInputStream(path)));
XML.Document doc = new XML.Document();
doc.parse(xmlreader);
public static XML.Element wrap(XML.Element e, Template.Scope s) throws IOException {
final String uri = e.getUri();
- if (uri.equals("http://xt.ibex.org/")) {
+ if (uri == null) {
+ // do nothing
+ } else if (uri.equals("http://xt.ibex.org/")) {
//#switch(e.getLocalName())
case "js": e = new Template.JSTag(e); break;
case "foreach": e = new Template.ForEach(e); break;
case "children": e = new Template.Children(e); break;
+ case "redirect": e = new Template.Redirect(e); break;
case "transaction": e = new Template.Transaction(e, s); break;
//#end
//#switch(uri.substring(19))
case "io": System.out.println("ibex.xt.io not yet implemented"); // TODO
//#end
- //throw new RuntimeException("Unknown XT library: "+uri);
+ //throw new JSElement.Exn("Unknown XT library: "+uri);
} else if (uri.startsWith("local:")) {
- Template t = parse(s.getLocalPath() + uri.substring(6), s);
+ // merge a new template into this tree
+ String path = uri.substring(6) + e.getLocalName() + ".xt";
+ Template t = parse(s.getLocalPath() + path, s);
List c = e.getChildren();
if (c.size() > 0) {
// move all children from e to placeholder
XML.Element placeholder = findPlaceholder(t);
- if (placeholder == null) throw new RuntimeException(
+ if (placeholder == null) throw new JSElement.Exn(
"<"+e.getQName()+"> attempted to include children into a " +
"template which does not contain an <xt:children /> tag.");
e.getChildren().clear();
}
- // merge original attributes with replacement template
- e = new JSElement.Merge(t, e);
- }
+ XML.Element merged = new JSElement.Merge(t, e);
- XML.Attributes a = e.getAttributes();
- for (int i=0; i < a.attrSize(); i++) {
- // FIXME: questionable abuse of XML namespaces here
- if ("if".equals(a.getKey(i)) && (
- "http://xt.ibex.org/".equals(e.getUri()) ||
- "http://xt.ibex.org/".equals(a.getUri(i)))) {
- e = new Template.IfWrap(e);
+ // remap the parent of the original element
+ if (e.getParent() != null) {
+ List ch = e.getParent().getChildren();
+ ch.set(ch.indexOf(e), merged);
}
+
+ return wrap(merged, s);
}
+ e = new Template.AttributeEval(e);
+
// wrap children
List c = e.getChildren();
for (int i=0; i < c.size(); i++)
}
/** Returns the first Template.Children child found. */
- private static Template.Children findPlaceholder(XML.Element e) {
- if (e instanceof Template.Children) return (Template.Children)e;
+ private static XML.Element findPlaceholder(XML.Element e) {
+ if ("http://xt.ibex.org/".equals(e.getUri()) && "children".equals(e.getLocalName()))
+ return e;
+
List c = e.getChildren();
for (int i=0; i < c.size(); i++) {
if (!(c.get(i) instanceof XML.Element)) continue;
- Template.Children ret = findPlaceholder((XML.Element)c.get(i));
+ XML.Element ret = findPlaceholder((XML.Element)c.get(i));
if (ret != null) return ret;
}
return null;
public JSScope getParentScope() { return tscope; }
- public static final class IfWrap extends JSElement {
- public IfWrap(XML.Element e) { super(e); }
- public void out(Writer w) throws IOException {
- loadAttr();
+ /** Processes ${...} blocks in attributes, loads applicable
+ * attributes into the JS scope and processes global attributes. */
+ public static class AttributeEval extends JSElement implements XML.Attributes {
+ protected XML.Attributes a;
+
+ public AttributeEval(XML.Element wrapped) { super(wrapped); a = wrapped.getAttributes(); }
+ public XML.Attributes getAttributes() { return this; }
+
+ public int getIndex(String q) { return a.getIndex(q); }
+ public int getIndex(String u, String k) { return a.getIndex(u, k); }
+ public String getKey(int i) { return a.getKey(i); }
+ public String getVal(int i) { return (String)eval(a.getVal(i)); }
+ public String getUri(int i) { return a.getUri(i); }
+ public String getPrefix(int i) { return a.getPrefix(i); }
+ public String getQName(int i) { return a.getQName(i); }
+ public int attrSize() { return a.attrSize(); }
+
+ public void out(Writer w) throws IOException {
try {
- Object varIf = get("if"); if (varIf != null) undeclare("if");
- if (varIf != null && !"true".equals(varIf)) return;
- } catch (JSExn e) { throw new RuntimeException(e); }
+ // FIXME: questionable abuse of XML namespaces here
+ boolean xturi = "http://xt.ibex.org/".equals(getUri());
+ for(int i=0; i < a.attrSize(); i++) {
+ if (!xturi && !"http://xt.ibex.org/".equals(a.getUri(i))) continue;
+
+ //#switch (a.getKey(i))
+ case "if": if (!"true".equals(eval(a.getVal(i)))) return;
+ case "declare":
+ Object d = eval(a.getVal(i));
+ if (!(d instanceof String)) throw new JSElement.Exn(
+ "attribute "+getPrefix()+":declare can only contain a "+
+ "space seperated list of variable names to declare.");
+ StringTokenizer st = new StringTokenizer((String)d, " ");
+ while (st.hasMoreTokens()) declare(st.nextToken());
+ continue;
+ //#end
+
+ declare(a.getKey(i));
+ put(a.getKey(i), eval(a.getVal(i)));
+ }
+ } catch (JSExn e) { throw new Exn(e); }
wrapped.out(w);
}
super(e);
List c = getChildren();
for (int i=0; i < c.size(); i++)
- if (c.get(i) instanceof XML.Element) throw new RuntimeException(
+ if (c.get(i) instanceof XML.Element) throw new JSElement.Exn(
"<"+getPrefix()+":js> tags may not have child elements");
}
public void out(Writer w) throws IOException {
- loadAttr();
-
List c = getChildren();
StringWriter s = new StringWriter();
for (int i=0; i < c.size(); i++) ((Tree.Leaf)c.get(i)).out(s);
public ForEach(XML.Element e) { super(e); }
public void out(Writer w) throws IOException {
- loadAttr();
-
try {
Object varIn = get("in"); if (varIn != null) undeclare("in");
Object varPut = get("put"); if (varPut != null) undeclare("put");
varIn = exec("return (" + varIn + ");");
- if (varIn == null || (varIn instanceof JSArray)) throw new RuntimeException(
+ if (varIn == null || (varIn instanceof JSArray)) throw new JSElement.Exn(
"<"+getPrefix()+":foreach> requires attribute 'in' to specify " +
"the name of a valid js array in the current scope, not in='"+varIn+"'.");
if (varPut == null) varPut = "x";
else if (!(varPut instanceof String) || get(varPut) != null)
- throw new RuntimeException(
+ throw new JSElement.Exn(
"<"+getPrefix()+":foreach> 'put' attribute requires the name of "+
"an undeclared variable, not put='"+varPut+"'.");
- if (get(varPut) != null) throw new RuntimeException(
+ if (get(varPut) != null) throw new JSElement.Exn(
"<"+getPrefix()+":foreach> has no 'put' attribute defined and the "+
"default variable 'x' already exists in the current scope.");
put(varPut, it.next());
for (int i=0; i < c.size(); i++) ((Tree.Leaf)c.get(i)).out(w);
}
- } catch (JSExn e) { throw new RuntimeException(e); }
+ } catch (JSExn e) { throw new JSElement.Exn(e); }
}
}
public Children(XML.Element e) { super(e); }
}
+ public static final class Redirect extends JSElement {
+ public Redirect(XML.Element e) { super(e); }
+
+ public void out(Writer w) throws IOException {
+ try {
+ Object p = get("page"); if (p != null) undeclare("page");
+ if (p == null || !(p instanceof String) || ((String)p).trim().equals(""))
+ throw new JSElement.Exn("<"+getPrefix()+":redirect> requires 'page' "+
+ "attribute to be a valid template path");
+ throw new RedirectSignal((String)p);
+ } catch (JSExn e) { throw new JSElement.Exn(e); }
+ }
+ }
+
// TODO: finish
public static final class Transaction extends JSElement {
private final Template.Scope scope; // FIXME: HACK. unstatisise all tags, or do this to all
public Transaction(XML.Element e, Template.Scope s) { super(e); scope = s;} // TODO: check kids
public void out(Writer w) throws IOException {
- loadAttr();
-
// TODO: <xt:use />
List c = getChildren();
StringWriter sw = new StringWriter();
}
}
- public static final class Java extends JSElement {
- // TODO what exactly?
- public Java(XML.Element w) { super(w); }
- }
-
public abstract static class Scope extends JSScope {
public Scope(JSScope j) { super(j); }
public abstract void transaction(JS t);
}
+ public static class Signal extends RuntimeException {}
+ public static class ReturnSignal extends Signal { }
+ public static class RedirectSignal extends Signal {
+ protected String target;
+ public RedirectSignal(String target) { super(); this.target = target; }
+ public String getTarget() { return target; }
+ }
}
projects / org.ibex.xt-crawshaw.git / blobdiff