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package org.apache.tapestry.html; |
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import org.apache.commons.lang.StringUtils; |
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import org.apache.hivemind.HiveMind; |
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import org.apache.tapestry.*; |
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import org.apache.tapestry.coerce.ValueConverter; |
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import org.apache.tapestry.engine.IEngineService; |
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import org.apache.tapestry.engine.ILink; |
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import org.apache.tapestry.services.ResponseBuilder; |
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import org.apache.tapestry.spec.IApplicationSpecification; |
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import java.util.ArrayList; |
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import java.util.Date; |
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import java.util.Iterator; |
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import java.util.List; |
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public abstract class Shell extends AbstractComponent |
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{ |
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public static final String SHELL_ATTRIBUTE = "org.apache.tapestry.html.Shell"; |
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private static final String GENERATOR_CONTENT = "Tapestry Application Framework, version " + Tapestry.VERSION; |
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protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
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TapestryUtils.storeUniqueAttribute(cycle, SHELL_ATTRIBUTE, this); |
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long startTime = System.currentTimeMillis(); |
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boolean rewinding = cycle.isRewinding(); |
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boolean dynamic = getBuilder().isDynamic(); |
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if (!rewinding && !dynamic) |
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{ |
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writeDocType(writer, cycle); |
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IPage page = getPage(); |
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if (!isDisableTapestryMeta()) { |
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writer.comment("Application: " + getApplicationSpecification().getName()); |
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writer.comment("Page: " + page.getPageName()); |
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writer.comment("Generated: " + new Date()); |
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} |
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writer.begin("html"); |
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writer.println(); |
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writer.begin("head"); |
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writer.println(); |
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if (!isDisableTapestryMeta()) |
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writeMetaTag(writer, "name", "generator", GENERATOR_CONTENT); |
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if (isDisableCaching()) |
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writeMetaTag(writer, "http-equiv", "content", "no-cache"); |
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if (getRenderContentType()) |
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writeMetaTag(writer, "http-equiv", "Content-Type", writer.getContentType()); |
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writeRefresh(writer, cycle); |
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if (getRenderBaseTag()) |
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getBaseTagWriter().render(writer, cycle); |
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writer.begin("title"); |
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writer.print(getTitle(), getRaw()); |
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writer.end(); |
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writer.println(); |
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IRender delegate = getDelegate(); |
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if (delegate != null) |
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delegate.render(writer, cycle); |
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IRender ajaxDelegate = getAjaxDelegate(); |
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if (ajaxDelegate != null) |
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ajaxDelegate.render(writer, cycle); |
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IAsset stylesheet = getStylesheet(); |
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if (stylesheet != null) |
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writeStylesheetLink(writer, cycle, stylesheet); |
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Iterator i = (Iterator) getValueConverter().coerceValue(getStylesheets(), Iterator.class); |
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while (i.hasNext()) |
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{ |
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stylesheet = (IAsset) i.next(); |
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writeStylesheetLink(writer, cycle, stylesheet); |
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} |
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} |
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IMarkupWriter nested = !dynamic ? writer.getNestedWriter() : writer; |
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renderBody(nested, cycle); |
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if (!rewinding) |
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{ |
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List relations = getRelations(); |
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if (relations != null) |
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writeRelations(writer, relations); |
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StringBuffer additionalContent = getContentBuffer(); |
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if (additionalContent != null) |
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writer.printRaw(additionalContent.toString()); |
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writer.end(); |
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} |
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if (!dynamic) |
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nested.close(); |
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if (!rewinding && !dynamic) |
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{ |
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writer.end(); |
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writer.println(); |
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if (!isDisableTapestryMeta()) { |
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long endTime = System.currentTimeMillis(); |
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writer.comment("Render time: ~ " + (endTime - startTime) + " ms"); |
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} |
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} |
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} |
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protected void cleanupAfterRender(IRequestCycle cycle) |
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{ |
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super.cleanupAfterRender(cycle); |
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cycle.removeAttribute(SHELL_ATTRIBUTE); |
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} |
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private void writeDocType(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
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String doctype = getDoctype(); |
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if (HiveMind.isNonBlank(doctype)) |
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{ |
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writer.printRaw("<!DOCTYPE " + doctype + ">"); |
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writer.println(); |
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} |
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} |
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private void writeStylesheetLink(IMarkupWriter writer, IRequestCycle cycle, IAsset stylesheet) |
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{ |
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writer.beginEmpty("link"); |
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writer.attribute("rel", "stylesheet"); |
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writer.attribute("type", "text/css"); |
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writer.attribute("href", stylesheet.buildURL()); |
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writer.println(); |
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} |
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private void writeRefresh(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
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int refresh = getRefresh(); |
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if (refresh <= 0) |
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return; |
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IEngineService pageService = getPageService(); |
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String pageName = getPage().getPageName(); |
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ILink link = pageService.getLink(false, pageName); |
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StringBuffer buffer = new StringBuffer(); |
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buffer.append(refresh); |
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buffer.append("; URL="); |
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buffer.append(StringUtils.replace(link.getAbsoluteURL(), "&", "&")); |
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writeMetaTag(writer, "http-equiv", "Refresh", buffer.toString()); |
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} |
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private void writeMetaTag(IMarkupWriter writer, String key, String value, String content) |
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{ |
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writer.beginEmpty("meta"); |
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writer.attribute(key, value); |
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writer.attribute("content", content); |
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writer.println(); |
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} |
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private void writeRelations(IMarkupWriter writer, List relations) |
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{ |
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Iterator i = relations.iterator(); |
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while (i.hasNext()) |
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{ |
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RelationBean relationBean = (RelationBean) i.next(); |
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if (relationBean != null) |
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writeRelation(writer, relationBean); |
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} |
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} |
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private void writeRelation(IMarkupWriter writer, RelationBean relationBean) |
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{ |
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writer.beginEmpty("link"); |
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writeAttributeIfNotNull(writer, "rel", relationBean.getRel()); |
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writeAttributeIfNotNull(writer, "rev", relationBean.getRev()); |
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writeAttributeIfNotNull(writer, "type", relationBean.getType()); |
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writeAttributeIfNotNull(writer, "media", relationBean.getMedia()); |
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writeAttributeIfNotNull(writer, "title", relationBean.getTitle()); |
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writeAttributeIfNotNull(writer, "href", relationBean.getHref()); |
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writer.println(); |
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} |
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private void writeAttributeIfNotNull(IMarkupWriter writer, String name, String value) |
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{ |
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if (value != null) |
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writer.attribute(name, value); |
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} |
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public static Shell get(IRequestCycle cycle) |
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{ |
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return (Shell) cycle.getAttribute(SHELL_ATTRIBUTE); |
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} |
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public void addRelation(RelationBean relation) |
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{ |
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List relations = getRelations(); |
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if (relations == null) |
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relations = new ArrayList(); |
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if (!relations.contains(relation)) |
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relations.add(relation); |
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setRelations(relations); |
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} |
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public void includeAdditionalContent(String content) |
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{ |
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if (HiveMind.isBlank(content)) |
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return; |
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StringBuffer buffer = getContentBuffer(); |
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if (buffer == null) |
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buffer = new StringBuffer(); |
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buffer.append(content); |
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setContentBuffer(buffer); |
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} |
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public abstract boolean isDisableCaching(); |
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public abstract IRender getAjaxDelegate(); |
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public abstract IRender getDelegate(); |
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public abstract int getRefresh(); |
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public abstract IAsset getStylesheet(); |
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public abstract Object getStylesheets(); |
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public abstract String getTitle(); |
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public abstract String getDoctype(); |
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public abstract boolean getRenderContentType(); |
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public abstract boolean isDisableTapestryMeta(); |
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public abstract ResponseBuilder getBuilder(); |
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public abstract ValueConverter getValueConverter(); |
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public abstract IEngineService getPageService(); |
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public abstract IApplicationSpecification getApplicationSpecification(); |
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public abstract IRender getBaseTagWriter(); |
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public abstract boolean getRenderBaseTag(); |
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public abstract boolean getRaw(); |
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public abstract List getRelations(); |
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public abstract void setRelations(List relations); |
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public abstract StringBuffer getContentBuffer(); |
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public abstract void setContentBuffer(StringBuffer buffer); |
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} |