zk/src/main/java/org/zkoss/zk/ui/sys/JSCumulativeContentRenderer.java
/** JSCumulativeContentRenderer.java.
Purpose:
Description:
History:
10:35:15 AM Apr 22, 2015, Created by jumperchen
Copyright (C) 2015 Potix Corporation. All Rights Reserved.
*/
package org.zkoss.zk.ui.sys;
import java.io.IOException;
import java.util.Date;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.zkoss.json.JSONAware;
import org.zkoss.json.JSONs;
import org.zkoss.lang.Generics;
import org.zkoss.lang.Strings;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.UiException;
/**
* An implementation of {@link ContentRenderer} that renders
* the content as a JavaScript property (i.e., name: ['value', 'value1', ..]) cumulatively.
* It can support to add the same name with different value that the different value
* will be packed into a list.
* @author jumperchen
* @since 8.0
*/
public class JSCumulativeContentRenderer implements ContentRenderer {
private Map<String, List<Object>> _stack = new LinkedHashMap<String, List<Object>>();
private List<Object> fetch(String name) {
List<Object> list = _stack.get(name);
if (list == null) {
list = new LinkedList<Object>();
_stack.put(name, list);
}
return list;
}
public void render(String name, String value) throws IOException {
fetch(name).add(renderValue(value));
}
public void render(String name, Date value) throws IOException {
fetch(name).add(renderValue(value));
}
public void render(String name, Object value) throws IOException {
fetch(name).add(renderValue(value));
}
public void render(String name, int value) throws IOException {
fetch(name).add(renderValue(value));
}
public void render(String name, short value) throws IOException {
fetch(name).add(renderValue(value));
}
public void render(String name, long value) throws IOException {
fetch(name).add(renderValue(value));
}
public void render(String name, byte value) throws IOException {
fetch(name).add(renderValue(value));
}
public void render(String name, boolean value) throws IOException {
fetch(name).add(renderValue(value));
}
public void render(String name, double value) throws IOException {
fetch(name).add(renderValue(value));
}
public void render(String name, float value) throws IOException {
fetch(name).add(renderValue(value));
}
public void render(String name, char value) throws IOException {
fetch(name).add(renderValue(value));
}
private String renderValue(String value) {
if (value == null)
return null;
else {
return Strings.escapeJavaScript(value);
}
}
private String renderValue(Date value) {
if (value == null)
return null;
else
return new StringBuilder().append("jq.j2d('").append(JSONs.d2j(value)).append("')").toString();
}
private String renderValue(Component value) {
if (value == null || value.getPage() == null)
return null;
else
return new StringBuilder().append("{$u:'").append(value.getUuid()).append("'}").toString();
}
private String renderValue(Object value) {
if (value == null || value instanceof String) {
return renderValue((String) value);
}
if (value instanceof Date) {
return renderValue((Date) value);
}
if (value instanceof Component) {
return renderValue((Component) value);
}
if (value instanceof Character) {
return renderValue(((Character) value).charValue());
}
StringBuilder buf = new StringBuilder();
if (value instanceof Map) {
buf.append('{');
boolean first = true;
for (Iterator it = ((Map) value).entrySet().iterator(); it.hasNext();) {
final Map.Entry me = (Map.Entry) it.next();
if (first)
first = false;
else
buf.append(',');
buf.append('\'').append(me.getKey()).append("':");
renderValue(me.getValue());
}
buf.append('}');
return buf.toString();
}
if (value instanceof List) {
buf.append('[');
int j = 0;
for (Iterator it = ((List) value).iterator(); it.hasNext(); j++) {
if (j > 0)
buf.append(',');
renderValue(it.next());
}
buf.append(']');
return buf.toString();
}
//handle array
if (value instanceof Object[]) {
buf.append('[');
final Object[] ary = (Object[]) value;
for (int j = 0; j < ary.length; ++j) {
if (j > 0)
buf.append(',');
renderValue(ary[j]);
}
buf.append(']');
return buf.toString();
}
if (value instanceof int[]) {
buf.append('[');
final int[] ary = (int[]) value;
for (int j = 0; j < ary.length; ++j) {
if (j > 0)
buf.append(',');
renderValue(ary[j]);
}
buf.append(']');
return buf.toString();
}
if (value instanceof long[]) {
buf.append('[');
final long[] ary = (long[]) value;
for (int j = 0; j < ary.length; ++j) {
if (j > 0)
buf.append(',');
renderValue(ary[j]);
}
buf.append(']');
return buf.toString();
}
if (value instanceof short[]) {
buf.append('[');
final short[] ary = (short[]) value;
for (int j = 0; j < ary.length; ++j) {
if (j > 0)
buf.append(',');
renderValue(ary[j]);
}
buf.append(']');
return buf.toString();
}
if (value instanceof float[]) {
buf.append('[');
final float[] ary = (float[]) value;
for (int j = 0; j < ary.length; ++j) {
if (j > 0)
buf.append(',');
renderValue(ary[j]);
}
buf.append(']');
return buf.toString();
}
if (value instanceof double[]) {
buf.append('[');
final double[] ary = (double[]) value;
for (int j = 0; j < ary.length; ++j) {
if (j > 0)
buf.append(',');
renderValue(ary[j]);
}
buf.append(']');
return buf.toString();
}
if (value instanceof byte[]) {
buf.append('[');
final byte[] ary = (byte[]) value;
for (int j = 0; j < ary.length; ++j) {
if (j > 0)
buf.append(',');
renderValue(ary[j]);
}
buf.append(']');
return buf.toString();
}
if (value instanceof char[]) {
buf.append('[');
final char[] ary = (char[]) value;
for (int j = 0; j < ary.length; ++j) {
if (j > 0)
buf.append(',');
renderValue(ary[j]);
}
buf.append(']');
return buf.toString();
}
if (value instanceof JSONAware)
return ((JSONAware) value).toJSONString();
else
return renderValue(value.toString());
}
private String renderValue(char value) {
StringBuilder buf = new StringBuilder();
buf.append('\'');
switch (value) {
case '\'':
case '\\':
buf.append('\\');
break;
case '\n':
buf.append('\\');
value = 'n';
break;
case '\t':
buf.append('\\');
value = 't';
break;
case '\r':
buf.append('\\');
value = 'r';
break;
case '\f':
buf.append('\\');
value = 'f';
break;
}
buf.append(value).append('\'');
return buf.toString();
}
public void renderDirectly(String name, Object value) {
fetch(name).add(renderValue(value));
}
public void renderWidgetListeners(Map<String, String> listeners) {
fetch("listeners0").add(listeners);
}
public void renderWidgetOverrides(Map<String, String> overrides) {
fetch("overrides").add(overrides);
}
public void renderWidgetAttributes(Map<String, String> attrs) {
renderClientAttributes(attrs);
}
public void renderClientAttributes(Map<String, String> attrs) {
fetch("domExtraAttrs").add(attrs);
}
public String toString() {
StringBuilder sb = new StringBuilder(64);
Map<String, List<Object>> result = new LinkedHashMap<String, List<Object>>(_stack);
List<Map<String, String>> listeners = Generics.cast(result.remove("listeners0"));
List<Map<String, String>> overrides = Generics.cast(result.remove("overrides"));
List<Map<String, String>> attrs = Generics.cast(result.remove("domExtraAttrs"));
for (Map.Entry<String, List<Object>> me : result.entrySet()) {
renderName(sb, me.getKey());
sb.append('[');
final List<Object> value = me.getValue();
int j = 0;
for (Iterator<Object> it = value.iterator(); it.hasNext(); j++) {
if (j > 0)
sb.append(',');
sb.append(it.next());
}
sb.append(']');
}
if (listeners != null) {
renderName(sb, "listeners0");
sb.append('[');
int j = 0;
for (Iterator<Map<String, String>> it = listeners.iterator(); it.hasNext(); j++) {
if (j > 0)
sb.append(',');
sb.append('{');
for (Iterator itt = it.next().entrySet().iterator(); itt.hasNext();) {
final Map.Entry me = (Map.Entry) itt.next();
sb.append(me.getKey()).append(":function(event){\n").append(me.getValue()).append("\n},");
}
sb.setCharAt(sb.length() - 1, '}');
}
sb.append(']');
}
if (overrides != null) {
renderName(sb, "overrides");
sb.append('[');
int j = 0;
for (Iterator<Map<String, String>> it = overrides.iterator(); it.hasNext(); j++) {
if (j > 0)
sb.append(',');
sb.append('{');
for (Iterator itt = it.next().entrySet().iterator(); itt.hasNext();) {
final Map.Entry me = (Map.Entry) itt.next();
final String name = (String) me.getKey();
final String value = (String) me.getValue();
if (value != null) {
//It is too costly to detect if it is a legal expression
//so we only check the most common illegal case
final String v = value.trim();
char cc;
if (v.length() != 0 && ((cc = v.charAt(v.length() - 1)) == ';' || cc == ','
|| (v.indexOf("function") < 0 && v.indexOf(';') >= 0)))
throw new UiException("Illegal client override: " + v
+ (name.startsWith("on")
? "\nTo listen an event, remember to captalize the third letter, such as onClick"
: "\nIt must be a legal JavaScript expression (not statement)"));
}
sb.append(name).append(":\n").append(Strings.isEmpty(value) ? "''" : value).append("\n,");
}
sb.setCharAt(sb.length() - 1, '}');
}
sb.append(']');
}
if (attrs != null) {
renderName(sb, "domExtraAttrs");
sb.append('[');
int j = 0;
for (Iterator<Map<String, String>> it = listeners.iterator(); it.hasNext(); j++) {
if (j > 0)
sb.append(',');
sb.append('{');
for (Iterator itt = it.next().entrySet().iterator(); itt.hasNext();) {
final Map.Entry me = (Map.Entry) itt.next();
renderValue(me.getKey()); //allow ':' or others
sb.append(':');
renderValue(me.getValue());
sb.append("\n,");
}
sb.setCharAt(sb.length() - 1, '}');
}
sb.append(']');
}
return sb.toString();
}
private void renderName(StringBuilder sb, String name) {
if (sb.length() > 0)
sb.append(',');
sb.append(name).append(':');
}
}