/**
* Generates and returns the ZK specific HTML tags such as stylesheet and JavaScript.
*
* <p>For each desktop, we have to generate a set of HTML tags to load ZK Client engine, style
* sheets and so on. For ZUL pages, it is generated automatically by page.dsp. However, for ZHTML
* pages, we have to generate these tags with special component such as org.zkoss.zhtml.Head, such
* that the result HTML page is legal.
*
* @param exec the execution (never null)
* @return the string holding the HTML tags, or null if already generated.
* @param wapp the Web application. If null, exec.getDesktop().getWebApp() is used. So you have to
* specify it if the execution is not associated with desktop (a fake execution, such as
* JSP/DSP).
* @param deviceType the device type, such as ajax. If null, exec.getDesktop().getDeviceType() is
* used. So you have to specify it if the execution is not associated with desktop (a fake
* execution).
* @see #outHeaderZkTags
*/
public static String outZkTags(Execution exec, WebApp wapp, String deviceType) {
if (exec.getAttribute(ATTR_ZK_TAGS_GENERATED) != null) return null;
exec.setAttribute(ATTR_ZK_TAGS_GENERATED, Boolean.TRUE);
final StringBuffer sb =
new StringBuffer(512)
.append('\n')
.append(outLangStyleSheets(exec, wapp, deviceType))
.append(outLangJavaScripts(exec, wapp, deviceType));
final Desktop desktop = exec.getDesktop();
if (desktop != null && exec.getAttribute(ATTR_DESKTOP_JS_GENED) == null) {
sb.append("<script class=\"z-runonce\" type=\"text/javascript\">\nzkdt('")
.append(desktop.getId())
.append("','")
.append(getContextURI(exec))
.append("','")
.append(desktop.getUpdateURI(null))
.append("','")
.append(desktop.getRequestPath())
.append("');")
.append(outSpecialJS(desktop))
.append("\n</script>\n");
}
return sb.toString();
}
public Set<? extends Component> getAvailableAtClient() {
if (!isCropper()) return null;
final Tree tree = getTree();
final Component parent = getParent();
final Execution exe = Executions.getCurrent();
final String attrnm = VISIBLE_ITEM + tree.getUuid();
Map<Treeitem, Boolean> map = cast((Map) exe.getAttribute(attrnm));
if (map == null) {
// Test very simple case first since getVisibleItems costly
if (parent instanceof Treeitem) {
for (Treeitem ti = (Treeitem) parent; ; ) {
if (!ti.isOpen()) return Collections.emptySet();
Component gp = ti.getParent().getParent();
if (!(gp instanceof Treeitem)) break;
ti = (Treeitem) gp;
}
}
map = tree.getVisibleItems();
Executions.getCurrent().setAttribute(attrnm, map);
}
return map.keySet();
// yes, we return all visible items, not just direct children
// in other words, we consider the whole tree as a single scope
// See also bug 2814504
}
/** Returns the first line to be generated to the output, or null if no special first line. */
public static final String outFirstLine(Execution exec, Page page) {
if (exec.getAttribute(FIRST_LINE_GENED) == null && !exec.isAsyncUpdate(null)) {
exec.setAttribute(FIRST_LINE_GENED, Boolean.TRUE);
return trimAndLF(((PageCtrl) page).getFirstLine());
}
return "";
}
/** Returns the doc type, or null if not available. It is null or <!DOCTYPE ...>. */
public static final String outDocType(Execution exec, Page page) {
if (exec.getAttribute(DOCTYPE_GENED) == null && !exec.isAsyncUpdate(null)) {
exec.setAttribute(DOCTYPE_GENED, Boolean.TRUE);
final String docType = ((PageCtrl) page).getDocType();
return trimAndLF(docType != null ? docType : page.getDesktop().getDevice().getDocType());
}
return "";
}
/**
* Returns the content of the specified condition that will be placed inside the header element of
* the specified page, or null if it was generated before. For HTML, the header element is the
* HEAD element.
*
* <p>Notice that this method ignores the following invocations against the same page in the same
* execution. In other words, it is safe to invoke this method multiple times.
*
* @param before whether to return the headers that shall be shown before ZK's CSS/JS headers. If
* true, only the headers that shall be shown before (such as meta) are returned. If true,
* only the headers that shall be shown after (such as link) are returned.
*/
public static final String outHeaders(Execution exec, Page page, boolean before) {
if (page == null) return "";
String attr = "zkHeaderGened" + page.getUuid();
if (before) attr += "Bf";
if (exec.getAttribute(attr) != null) return null;
exec.setAttribute(attr, Boolean.TRUE); // generated only once
return before ? ((PageCtrl) page).getBeforeHeadTags() : ((PageCtrl) page).getAfterHeadTags();
}
/**
* Generates the unavailable message in HTML tags, if any.
*
* @param exec the execution (never null)
*/
public static String outUnavailable(Execution exec) {
if (exec.getAttribute(ATTR_UNAVAILABLE_GENED) == null && !exec.isAsyncUpdate(null)) {
exec.setAttribute(ATTR_UNAVAILABLE_GENED, Boolean.TRUE);
final Device device = exec.getDesktop().getDevice();
String s = device.getUnavailableMessage();
return s != null ? "<noscript>\n" + s + "\n</noscript>" : "";
}
return ""; // nothing to generate
}
/**
* Returns HTML tags to include all style sheets that are defined in all languages of the
* specified device (never null).
*
* <p>In addition to style sheets defined in lang.xml and lang-addon.xml, it also include:
*
* <ol>
* <li>The style sheet specified in the theme-uri parameter.
* </ol>
*
* <p>FUTURE CONSIDERATION: we might generate the inclusion on demand instead of all at once.
*
* @param exec the execution (never null)
* @param wapp the Web application. If null, exec.getDesktop().getWebApp() is used. So you have to
* specify it if the execution is not associated with desktop (a fake execution, such as
* JSP/DSP).
* @param deviceType the device type, such as ajax. If null, exec.getDesktop().getDeviceType() is
* used. So you have to specify it if the execution is not associated with desktop (a fake
* execution).
*/
public static final String outLangStyleSheets(Execution exec, WebApp wapp, String deviceType) {
if (exec.isAsyncUpdate(null) || exec.getAttribute(ATTR_LANG_CSS_GENED) != null)
return ""; // nothing to generate
exec.setAttribute(ATTR_LANG_CSS_GENED, Boolean.TRUE);
final StringBuffer sb = new StringBuffer(512);
for (StyleSheet ss : getStyleSheets(exec, wapp, deviceType)) append(sb, ss, exec, null);
if (sb.length() > 0) sb.append('\n');
return sb.toString();
}
private static Map<Component, ShadowInfo> getShadowInfos(boolean autoCreate) {
Execution exec = Executions.getCurrent();
if (exec == null) return null;
Map<Component, ShadowInfo> result = cast((Map) exec.getAttribute(COMPONENT_INFO));
if (result == null && autoCreate) {
result = new HashMap<Component, ShadowInfo>();
exec.setAttribute(COMPONENT_INFO, result);
}
return result;
}
public BindingAnnotationInfoChecker getAnnotationInfoChecker() {
Execution exec = Executions.getCurrent();
if (exec == null) return null;
BindingAnnotationInfoChecker checker =
(BindingAnnotationInfoChecker) exec.getAttribute(CHECKER_KEY);
if (checker == null) {
checker = createDefaultAnnotationInfoChecker();
exec.setAttribute(CHECKER_KEY, checker);
}
return checker;
}
public BindingExecutionInfoCollector getExecutionInfoCollector() {
Execution exec = Executions.getCurrent();
if (exec == null) return null;
BindingExecutionInfoCollector collector =
(BindingExecutionInfoCollector) exec.getAttribute(COLLECTOR_KEY);
if (collector == null) {
collector = createBindingExecutionInfoCollector();
exec.setAttribute(COLLECTOR_KEY, collector);
}
return collector;
}
/**
* Returns whether a component can directly generate HTML tags to the output. This flag is used by
* components that can generate the content directly, such as {@link
* org.zkoss.zk.ui.HtmlNativeComponent}
*
* @see #setDirectContent
*/
public static boolean isDirectContent(Execution exec) {
if (exec == null) exec = Executions.getCurrent();
return exec != null && exec.getAttribute(ATTR_DIRECT_CONTENT) != null;
}
/**
* Returns if the ZK specific HTML tags are generated.
*
* @since 5.0.3
*/
public static boolean isZkTagsGenerated(Execution exec) {
return exec.getAttribute(ATTR_ZK_TAGS_GENERATED) != null;
}
/**
* Returns the render context, or null if not available. It is used to render the content that
* will appear before the content generated by {@link ContentRenderer}, such as crawlable content.
*
* @param exec the execution. If null, {@link Executions#getCurrent} is assumed.
*/
public static final RenderContext getRenderContext(Execution exec) {
if (exec == null) exec = Executions.getCurrent();
return exec != null ? (RenderContext) exec.getAttribute(ATTR_RENDER_CONTEXT) : null;
}
/**
* Returns HTML tags to include all JavaScript files and codes that are required when loading a
* ZUML page (never null).
*
* <p>FUTURE CONSIDERATION: we might generate the inclusion on demand instead of all at once.
*
* @param exec the execution (never null)
* @param wapp the Web application. If null, exec.getDesktop().getWebApp() is used. So you have to
* specify it if the execution is not associated with desktop (a fake execution, such as
* JSP/DSP).
* @param deviceType the device type, such as ajax. If null, exec.getDesktop().getDeviceType() is
* used. So you have to specify it if the execution is not associated with desktop (a fake
* execution).
*/
public static final String outLangJavaScripts(Execution exec, WebApp wapp, String deviceType) {
if (exec.isAsyncUpdate(null) || exec.getAttribute(ATTR_LANG_JS_GENED) != null)
return ""; // nothing to generate
exec.setAttribute(ATTR_LANG_JS_GENED, Boolean.TRUE);
final Desktop desktop = exec.getDesktop();
if (wapp == null) wapp = desktop.getWebApp();
if (deviceType == null) deviceType = desktop != null ? desktop.getDeviceType() : "ajax";
final StringBuffer sb = new StringBuffer(1536);
final Set<JavaScript> jses = new LinkedHashSet<JavaScript>(32);
for (LanguageDefinition langdef : LanguageDefinition.getByDeviceType(deviceType))
jses.addAll(langdef.getJavaScripts());
for (JavaScript js : jses) append(sb, js);
sb.append("\n<!-- ZK ").append(wapp.getVersion());
if (WebApps.getFeature("ee")) sb.append(" EE");
else if (WebApps.getFeature("pe")) sb.append(" PE");
sb.append(' ').append(wapp.getBuild());
Object o = wapp.getAttribute("org.zkoss.zk.ui.notice");
if (o != null) sb.append(o);
sb.append(" -->\n");
int tmout = 0;
final Boolean autoTimeout = getAutomaticTimeout(desktop);
if (autoTimeout != null
? autoTimeout.booleanValue()
: wapp.getConfiguration().isAutomaticTimeout(deviceType)) {
if (desktop != null) {
tmout = desktop.getSession().getMaxInactiveInterval();
} else {
Object req = exec.getNativeRequest();
if (req instanceof HttpServletRequest) {
final HttpSession hsess = ((HttpServletRequest) req).getSession(false);
if (hsess != null) {
final Session sess = SessionsCtrl.getSession(wapp, hsess);
if (sess != null) {
tmout = sess.getMaxInactiveInterval();
} else {
// try configuration first since HttpSession's timeout is set
// when ZK Session is created (so it is not set yet)
// Note: no need to setMaxInactiveInternval here since it will
// be set later or not useful at the end
tmout = wapp.getConfiguration().getSessionMaxInactiveInterval();
if (tmout <= 0) // system default
tmout = hsess.getMaxInactiveInterval();
}
} else tmout = wapp.getConfiguration().getSessionMaxInactiveInterval();
}
}
if (tmout > 0) { // unit: seconds
int extra = tmout / 8;
tmout += extra > 60 ? 60 : extra < 5 ? 5 : extra;
// Add extra seconds to ensure it is really timeout
}
}
final boolean
keepDesktop =
exec.getAttribute(Attributes.NO_CACHE) == null
&& !"page".equals(ExecutionsCtrl.getPageRedrawControl(exec)),
groupingAllowed = isGroupingAllowed(desktop);
final String progressboxPos =
org.zkoss.lang.Library.getProperty("org.zkoss.zul.progressbox.position", "");
if (tmout > 0 || keepDesktop || progressboxPos.length() > 0 || !groupingAllowed) {
sb.append("<script class=\"z-runonce\" type=\"text/javascript\">\nzkopt({");
if (keepDesktop) sb.append("kd:1,");
if (!groupingAllowed) sb.append("gd:1,");
if (tmout > 0) sb.append("to:").append(tmout).append(',');
if (progressboxPos.length() > 0) sb.append("ppos:'").append(progressboxPos).append('\'');
if (sb.charAt(sb.length() - 1) == ',') sb.setLength(sb.length() - 1);
sb.append("});\n</script>");
}
final Device device = Devices.getDevice(deviceType);
String s = device.getEmbedded();
if (s != null) sb.append(s).append('\n');
return sb.toString();
}
