+++ /dev/null
-// Copyright 2004 Adam Megacz, see the COPYING file for licensing [GPL]
-package org.ibex;
-
-import java.io.*;
-import java.util.*;
-import org.ibex.js.*;
-import org.ibex.util.*;
-
-/**
- * Encapsulates a template node (the <template/> element of a
- * .ibex file, or any child element thereof).
- *
- * Note that the Template instance corresponding to the
- * <template/> node carries all the header information -- hence
- * some of the instance members are not meaningful on non-root
- * Template instances. We refer to these non-root instances as
- * <i>anonymous templates</i>.
- *
- * See the Ibex reference for information on the order in which
- * templates are applied, attributes are put, and scripts are run.
- */
-public class Template {
-
- // Instance Members ///////////////////////////////////////////////////////
-
- String id = null; ///< the id of this box
- String redirect = null; ///< the id of the redirect target; only meaningful on a root node
- private String[] keys; ///< keys to be "put" to instances of this template; elements correspond to those of vals
- private Object[] vals; ///< values to be "put" to instances of this template; elements correspond to those of keys
- private String[] urikeys;
- private String[] urivals;
- private Vec children = new Vec(); ///< during XML parsing, this holds the list of currently-parsed children; null otherwise
- private JS script = null; ///< the script on this node
- Template prev;
- Template prev2;
- JSScope staticScope = null; ///< the scope in which the static block is executed
- JS staticObject = null;
-
-
- // Only used during parsing /////////////////////////////////////////////////////////////////
-
- private StringBuffer content = null; ///< during XML parsing, this holds partially-read character data; null otherwise
- private int content_start = 0; ///< line number of the first line of <tt>content</tt>
- private int startLine = -1; ///< the line number that this element starts on
- private Ibex ibex;
-
-
- // Static data/methods ///////////////////////////////////////////////////////////////////
-
- // for non-root nodes
- private Template(Template t, int startLine) { prev = t; this.ibex = t.ibex; this.startLine = startLine; }
- private Template(Ibex ibex) { this.ibex = ibex; }
-
-
- // Methods to apply templates ////////////////////////////////////////////////////////
-
-
- /** Applies the template to Box b
- * @param pboxes a vector of all box parents on which to put $-references
- * @param ptemplates a vector of the fileNames to recieve private references on the pboxes
- */
- void apply(Box b) throws JSExn {
- try {
- apply(b, null);
- } catch (IOException e) {
- b.clear(Box.VISIBLE);
- b.mark_for_repack();
- Log.warn(this, e);
- throw new JSExn(e.toString());
- } catch (JSExn e) {
- b.clear(Box.VISIBLE);
- b.mark_for_repack();
- Log.warn(this, e);
- throw e;
- }
- }
-
- private void apply(Box b, PerInstantiationScope parentPis) throws JSExn, IOException {
- if (prev != null) prev.apply(b, null);
- if (prev2 != null) prev2.apply(b, null);
-
- // FIXME this dollar stuff is all wrong
- if (id != null) parentPis.putDollar(id, b);
-
- PerInstantiationScope pis = new PerInstantiationScope(b, ibex, parentPis, staticObject);
- for(int i=0; i<urikeys.length; i++) {
- if (urikeys[i] == null) continue;
- pis.declare(urikeys[i]);
- pis.put(urikeys[i], ibex.resolveString(urivals[i], true));
- }
-
- // FIXME needs to obey the new application-ordering rules
- for (int i=0; children != null && i<children.size(); i++) {
- Box kid = new Box();
- ((Template)children.elementAt(i)).apply(kid, pis);
- b.putAndTriggerTraps(b.get("numchildren"), kid);
- }
-
- if (script != null) JS.cloneWithNewParentScope(script, pis).call(null, null, null, null, 0);
-
- Object key, val;
- for(int i=0; keys != null && i < keys.length; i++) {
- if (keys[i] == null) continue;
- key = keys[i];
- val = vals[i];
-
- if ("null".equals(val)) val = null;
-
- if (val != null && val instanceof String && ((String)val).length() > 0) {
- switch (((String)val).charAt(0)) {
- case '$':
- val = pis.get(val);
- if (val == null) throw new JSExn("unknown box id '"+vals[i]+"' referenced in XML attribute");
- break;
- case '.':
- val = ibex.resolveString(((String)val).substring(1), false);
- // FIXME: url case
- // FIXME: should we be resolving all of these in the XML-parsing code?
- }
- }
- b.putAndTriggerTraps(key, val);
- }
- }
-
-
-
- // XML Parsing /////////////////////////////////////////////////////////////////
-
- public static Template buildTemplate(String sourceName, Object s, Ibex ibex) {
- try {
- return new TemplateHelper(sourceName, s, ibex).t;
- } catch (Exception e) {
- Log.error(Template.class, e);
- return null;
- }
- }
-
- /** handles XML parsing; builds a Template tree as it goes */
- static final class TemplateHelper extends XML {
-
- String sourceName;
- private int state = STATE_INITIAL;
- private static final int STATE_INITIAL = 0;
- private static final int STATE_IN_ROOT_NODE = 1;
- private static final int STATE_IN_TEMPLATE_NODE = 2;
- private static final int STATE_IN_META_NODE = 3;
-
- StringBuffer static_content = null;
- int static_content_start = 0;
- Vec nodeStack = new Vec();
- Template t = null;
- int meta = 0;
- Ibex ibex;
-
- String initial_uri = "";
-
- public TemplateHelper(String sourceName, Object s, Ibex ibex) throws XML.Exn, IOException, JSExn {
- this.sourceName = sourceName;
- this.ibex = ibex;
- InputStream is = Stream.getInputStream(s);
- Ibex.Blessing b = Ibex.Blessing.getBlessing(s).parent;
- while(b != null) {
- if(b.parentkey != null) initial_uri = b.parentkey + (initial_uri.equals("") ? "" : "." + initial_uri);
- b = b.parent;
- }
- initial_uri = "";
- parse(new InputStreamReader(is));
- JS staticScript = parseScript(static_content, static_content_start);
- t.staticObject = new JS();
- t.staticScope = new PerInstantiationScope(null, ibex, null, t.staticObject);
- if (staticScript != null) JS.cloneWithNewParentScope(staticScript, t.staticScope).call(null, null, null, null, 0);
- }
-
- private JS parseScript(StringBuffer content, int content_start) throws IOException {
- if (content == null) return null;
- String contentString = content.toString();
- if (contentString.trim().length() > 0) return JS.fromReader(sourceName, content_start, new StringReader(contentString));
- return null;
- }
-
- public void startElement(XML.Element c) throws XML.Exn {
- switch(state) {
- case STATE_IN_META_NODE: { meta++; return; }
- case STATE_INITIAL:
- if (!"ibex".equals(c.getLocalName()))
- throw new XML.Exn("root element was not <ibex>", XML.Exn.SCHEMA, getLine(), getCol());
- if (c.getAttrLen() != 0)
- throw new XML.Exn("root element must not have attributes", XML.Exn.SCHEMA, getLine(), getCol());
- if (c.getUri("ui") == null || "".equals(c.getUri("ui"))) c.addUri("ui", "ibex://ui");
- if (c.getUri("meta") == null || "".equals(c.getUri("meta"))) c.addUri("meta", "ibex://meta");
- if (c.getUri("") == null || "".equals(c.getUri(""))) c.addUri("", initial_uri);
- state = STATE_IN_ROOT_NODE;
- return;
- case STATE_IN_ROOT_NODE:
- if ("ibex://meta".equals(c.getUri())) { state = STATE_IN_META_NODE; meta = 0; return; }
- state = STATE_IN_TEMPLATE_NODE;
- t = (t == null) ? new Template(ibex) : new Template(t, getLine());
- break;
- case STATE_IN_TEMPLATE_NODE:
- nodeStack.addElement(t);
- t = new Template(ibex);
- break;
- }
-
- if (!("ibex://ui".equals(c.getUri()) && "box".equals(c.getLocalName()))) {
- String tagname = (c.getUri().equals("") ? "" : (c.getUri() + ".")) + c.getLocalName();
- // GROSS hack
- try {
- // GROSSER hack
- t.prev2 = (Template)t.ibex.resolveString(tagname, false).call(null, null, null, null, 9999);
- } catch (Exception e) {
- Log.error(Template.class, e);
- }
- }
-
- Hash urimap = c.getUriMap();
- t.urikeys = new String[urimap.size()];
- t.urivals = new String[urimap.size()];
- Enumeration uriEnumeration = urimap.keys();
- int ii = 0;
- while(uriEnumeration.hasMoreElements()) {
- String key = (String)uriEnumeration.nextElement();
- String val = (String)urimap.get(key);
- if (val.equals("ibex://ui")) continue;
- if (val.equals("ibex://meta")) continue;
- t.urikeys[ii] = key;
- if (val.length() > 0 && val.charAt(0) == '.') val = val.substring(1);
- t.urivals[ii] = val;
- ii++;
- }
-
- Vec keys = new Vec(c.getAttrLen());
- Vec vals = new Vec(c.getAttrLen());
-
- // process attributes into Vecs, dealing with any XML Namespaces in the process
- ATTR: for (int i=0; i < c.getAttrLen(); i++) {
- if (c.getAttrKey(i).equals("id")) {
- t.id = c.getAttrVal(i).toString().intern();
- continue ATTR;
- }
-
- // treat value starting with '.' as resource reference
- String uri = c.getAttrUri(i); if (!uri.equals("")) uri = '.' + uri;
- keys.addElement(c.getAttrKey(i));
- vals.addElement((c.getAttrVal(i).startsWith(".") ? uri : "") + c.getAttrVal(i));
- }
-
- if (keys.size() == 0) return;
-
- // sort the attributes lexicographically
- Vec.sort(keys, vals, new Vec.CompareFunc() { public int compare(Object a, Object b) {
- return ((String)a).compareTo((String)b);
- } });
-
- t.keys = new String[keys.size()];
- t.vals = new Object[vals.size()];
- keys.copyInto(t.keys);
- vals.copyInto(t.vals);
-
- // convert attributes to appropriate types and intern strings
- for(int i=0; i<t.keys.length; i++) {
- t.keys[i] = t.keys[i].intern();
-
- String valString = t.vals[i].toString();
-
- if (valString.equals("true")) t.vals[i] = Boolean.TRUE;
- else if (valString.equals("false")) t.vals[i] = Boolean.FALSE;
- else if (valString.equals("null")) t.vals[i] = null;
- else {
- boolean hasNonNumeral = false;
- boolean periodUsed = false;
- for(int j=0; j<valString.length(); j++)
- if (j == 0 && valString.charAt(j) == '-') {
- } else if (valString.charAt(j) == '.' && !periodUsed && j != valString.length() - 1) {
- periodUsed = true;
- } else if (!Character.isDigit(valString.charAt(j))) {
- hasNonNumeral = true;
- break;
- }
- if (valString.length() > 0 && !hasNonNumeral) t.vals[i] = new Double(valString);
- else t.vals[i] = valString.intern();
- }
- }
- }
-
- public void endElement(XML.Element c) throws XML.Exn, IOException {
- switch(state) {
- case STATE_IN_META_NODE: if (--meta < 0) state = STATE_IN_ROOT_NODE; return;
- case STATE_IN_ROOT_NODE: return;
- case STATE_IN_TEMPLATE_NODE: {
- if (t.content != null) { t.script = parseScript(t.content, t.content_start); t.content = null; }
- if (nodeStack.size() == 0) { state = STATE_IN_ROOT_NODE; return; }
- Template oldt = t;
- t = (Template)nodeStack.lastElement();
- nodeStack.setSize(nodeStack.size() - 1);
- t.children.addElement(oldt);
- int oldt_lines = getLine() - oldt.startLine;
- if (t.content == null) t.content = new StringBuffer();
- for (int i=0; oldt_lines > i; i++) t.content.append('\n');
- }
- }
- }
-
- public void characters(char[] ch, int start, int length) throws XML.Exn {
- for (int i=0; length >i; i++) if (ch[start+i] == '\t')
- Log.error(Template.class, "tabs are not allowed in Ibex files ("+getLine()+":"+getCol()+")");
- switch(state) {
- case STATE_IN_TEMPLATE_NODE:
- if (t.content == null) {
- t.content_start = getLine();
- t.content = new StringBuffer();
- }
- t.content.append(ch, start, length);
- return;
- case STATE_IN_ROOT_NODE:
- if (static_content == null) {
- static_content_start = getLine();
- static_content = new StringBuffer();
- }
- static_content.append(ch, start, length);
- return;
- }
- }
-
- public void whitespace(char[] ch, int start, int length) throws XML.Exn { }
- }
-
- private static class PerInstantiationScope extends JSScope {
- Ibex ibex = null;
- PerInstantiationScope parentBoxPis = null;
- JS myStatic = null;
- void putDollar(String key, Box target) throws JSExn {
- if (parentBoxPis != null) parentBoxPis.putDollar(key, target);
- declare("$" + key);
- put("$" + key, target);
- }
- public PerInstantiationScope(JSScope parentScope, Ibex ibex, PerInstantiationScope parentBoxPis, JS myStatic) {
- super(parentScope);
- this.parentBoxPis = parentBoxPis;
- this.ibex = ibex;
- this.myStatic = myStatic;
- }
- public Object get(Object key) throws JSExn {
- if (super.has(key)) return super.get(key);
- if (key.equals("ibex")) return ibex;
- if (key.equals("")) return ibex.get("");
- if (key.equals("static")) return myStatic;
- return super.get(key);
- }
- }
-
-}
-
-
projects / org.ibex.core.git / blobdiff