/**
* Setup this processor before processing the event by calling {@link #process}.
*
* <p>Note: it doesn't invoke {@link ExecutionCtrl#onActivate}
*/
public void setup() {
SessionsCtrl.setCurrent(_desktop.getSession());
final Execution exec = _desktop.getExecution();
ExecutionsCtrl.setCurrent(exec);
((ExecutionCtrl) exec).setCurrentPage(getPage());
}
/**
* Cleanup this process after processing the event by calling {@link #process}.
*
* <p>Note: Don't call this method if the event process executes in the same thread.
*/
public void cleanup() {
ExecutionsCtrl.setCurrent(null);
SessionsCtrl.setCurrent((Session) null);
}
public void redraw(Writer out) throws java.io.IOException {
// Note: _tag == null can NOT be handled specially
final Execution exec = Executions.getCurrent();
final boolean root =
getParent() == null
&& (getPage().isComplete()
|| (exec != null && "complete".equals(ExecutionsCtrl.getPageRedrawControl(exec))));
if (exec == null
|| exec.isAsyncUpdate(null)
|| (!root && !HtmlPageRenders.isDirectContent(exec))) {
super.redraw(out); // renderProperties (assume in zscript)
return;
}
Writer oldout = null;
if (exec != null
&& !HtmlPageRenders.isZkTagsGenerated(exec)
&& exec.getAttribute(ATTR_TOP_NATIVE) == null) { // need to check topmost native only
String tn;
if (root
|| "html".equals(tn = _tag != null ? _tag.toLowerCase() : "")
|| "body".equals(tn)
|| "head".equals(tn)) {
exec.setAttribute(ATTR_TOP_NATIVE, Boolean.TRUE);
oldout = out;
out = new StringWriter();
}
}
out.write(getPrologHalf());
// children
Component child = getFirstChild();
if (child == null) {
// need to invoke outStandalone to generate response if any (Bug 3009925)
// however, it is not required if not root (since others will invoke)
if (root) HtmlPageRenders.outStandalone(exec, null, out);
} else {
if (root) HtmlPageRenders.setDirectContent(exec, true);
do {
Component next = child.getNextSibling();
if (child instanceof Native
|| ((ComponentCtrl) child).getExtraCtrl() instanceof DirectContent) {
((ComponentCtrl) child).redraw(out);
} else {
HtmlPageRenders.setDirectContent(exec, false);
HtmlPageRenders.outStandalone(exec, child, out);
HtmlPageRenders.setDirectContent(exec, true);
}
child = next;
} while (child != null);
}
out.write(getEpilogHalf());
if (oldout != null) {
exec.removeAttribute(ATTR_TOP_NATIVE);
// order: <html><head><zkhead><body>
// 1. replace <zkhead/> if found
// 2. insert before </head> if found
// 3. insert after <body> if found
// 4. insert after <html> if found
// 5. insert at the end if none of above found
final StringBuffer sb = ((StringWriter) out).getBuffer();
if (!HtmlPageRenders.isZkTagsGenerated(exec)) {
int jhead = -1, // anchor of header
junav = -1, // anchor of unavailable
head = -1, // index of <head>
heade = -1, // index of </head>
html = -1; // index of <html>
for (int j = 0, len = sb.length(); (j = sb.indexOf("<", j)) >= 0; ) {
++j;
if (jhead < 0 && startsWith(sb, "zkhead", j)) {
int l = Strings.indexOf(sb, '>', j) + 1;
sb.delete(jhead = --j, l); // jhead found
len = sb.length();
} else if (head < 0 && startsWith(sb, "head", j)) {
head = Strings.indexOf(sb, '>', j) + 1;
} else if (html < 0 && startsWith(sb, "html", j)) {
html = Strings.indexOf(sb, '>', j) + 1;
} else if (junav < 0 && startsWith(sb, "body", j)) {
junav = Strings.indexOf(sb, '>', j) + 1; // junav found
break; // done
} else if (sb.charAt(j) == '/' && startsWith(sb, "head", ++j)) {
heade = j - 2;
}
}
boolean disableUnavailable = false;
if (jhead < 0
&& ((jhead = heade) < 0) // use </head> if no <zkhead>
&& ((jhead = head) < 0) // use <head> if no </head> (though unlikely)
&& ((jhead = junav) < 0) // use <body> if no <head>
&& ((jhead = html) < 0)) { // use <html> if no <body>
if (_tag != null) {
final String tn = _tag.toLowerCase();
if ("div".equals(tn) || "span".equals(tn)) {
l_loop:
for (int j = 0, len = sb.length(); j < len; ++j)
switch (sb.charAt(j)) {
case '>':
disableUnavailable = true; // make output cleaner
jhead = j + 1; // found
case '=': // it might have something depends on JS
case '"':
break l_loop;
}
}
}
if (jhead < 0) jhead = 0; // insert at head if not found
}
final String msg = HtmlPageRenders.outUnavailable(exec);
// called if disableUnavailable (so it won't be generated later)
if (msg != null && !disableUnavailable) {
if (junav < 0) {
if (html >= 0) junav = sb.lastIndexOf("</html");
}
if (junav >= 0) sb.insert(junav < jhead ? jhead : junav, msg);
else sb.append(msg);
}
final String zktags = HtmlPageRenders.outHeaderZkTags(exec, getPage());
if (zktags != null) sb.insert(jhead, zktags);
}
oldout.write(sb.toString());
}
}
