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| package org.apache.tapestry.html; |
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| |
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| import java.util.Date; |
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| import java.util.Iterator; |
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| |
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| import org.apache.hivemind.HiveMind; |
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| import org.apache.tapestry.AbstractComponent; |
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| import org.apache.tapestry.IAsset; |
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| import org.apache.tapestry.IMarkupWriter; |
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| import org.apache.tapestry.IPage; |
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| import org.apache.tapestry.IRender; |
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| import org.apache.tapestry.IRequestCycle; |
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| import org.apache.tapestry.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.spec.IApplicationSpecification; |
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| public abstract class Shell extends AbstractComponent |
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| { |
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| private static final String generatorContent = "Tapestry Application Framework, version " |
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| + Tapestry.VERSION; |
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| |
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| protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle)
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| { |
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| long startTime = 0;
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| boolean rewinding = cycle.isRewinding();
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| if (!rewinding)
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| { |
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| startTime = System.currentTimeMillis();
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| writeDocType(writer, cycle);
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| IPage page = getPage();
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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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| 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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| writeMetaTag(writer, "name", "generator", generatorContent);
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| if (getRenderContentType())
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| writeMetaTag(writer, "http-equiv", "Content-Type", writer.getContentType());
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| getBaseTagWriter().render(writer, cycle);
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| writer.begin("title");
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| writer.print(getTitle());
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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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| 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(
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| getStylesheets(), |
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| 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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| writeRefresh(writer, cycle);
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| writer.end();
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| } |
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| renderBody(writer, cycle);
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| if (!rewinding)
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| { |
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| writer.end();
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| writer.println();
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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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| 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(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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| 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 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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| } |