Examples of org.apache.tapestry.IMarkupWriter

org.apache.tapestry.IMarkupWriter
Defines an object that can write markup (XML, HTML, XHTML) style output. A IMarkupWriter handles translation from unicode to the markup language (escaping characters such as '<' and '>' to their entity equivalents, '<' and '>') as well as assisting with nested elements, closing tags, etc. @author Howard Ship, David Solis @version $Id: IMarkupWriter.java 243791 2004-02-19 17:38:13Z hlship $

        verifyControls();
    }


    public void testCollectionNullAndEmpty()
    {
        IMarkupWriter writer = newWriter();
        DescribableStrategy strategy = newStrategy();


        replayControls();


        HTMLDescriptionReceiver dr = new HTMLDescriptionReceiver(writer, strategy);

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        verifyControls();
    }


    public void testScalarProperties()
    {
        IMarkupWriter writer = newWriter();
        DescribableStrategy strategy = newStrategy();


        trainForTitle(writer, "Scalars");
        trainForKeyValue(writer, "boolean", "true", true);
        trainForKeyValue(writer, "byte", "22", false);

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        verifyControls();
    }


    public void testNullRoot()
    {
        IMarkupWriter writer = newWriter();
        DescribableStrategy strategy = newStrategy();


        writer.print(HTMLDescriptionReceiver.NULL_VALUE);


        replayControls();


        RootDescriptionReciever dr = new HTMLDescriptionReceiver(writer, strategy);

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        cycle.setAttribute(ATTRIBUTE_NAME, this);


        _outerWriter = writer;


        IMarkupWriter nested = writer.getNestedWriter();


        renderBody(nested, cycle);


        // Start the body tag.
        writer.println();
        writer.begin(getElement());
        renderInformalParameters(writer, cycle);


        writer.println();


        // Write the page's scripting.  This is included scripts
        // and dynamic JavaScript, including initialization.


        writeScript(_outerWriter);


        // Close the nested writer, which dumps its buffered content
        // into its parent.


        nested.close();


        writer.end(); // <body>


    }

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        // Commit all changes and ignore further changes.


        IPage page = cycle.getPage();


        IMarkupWriter writer = page.getResponseWriter(output);


        output.setContentType(writer.getContentType());


        boolean discard = true;


        try
        {
            cycle.renderPage(writer);


            discard = false;
        }
        finally
        {
            // Closing the writer closes its PrintWriter and a whole stack of java.io objects,
            // which tend to stream a lot of output that eventually hits the
            // ResponseOutputStream.  If we are discarding output anyway (due to an exception
            // getting thrown during the render), we can save ourselves some trouble
            // by ignoring it.


            if (discard)
                output.setDiscard(true);


            writer.close();


            if (discard)
                output.setDiscard(false);
        }

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        // And another for the name of the component that
        // triggered the submit.


        addHiddenValue(FormConstants.SUBMIT_NAME_PARAMETER, null);


        IMarkupWriter nested = _writer.getNestedWriter();


        _form.renderBody(nested, _cycle);


        runDeferredRunnables();
        
        int portI = (port == null) ? 0 : port.intValue();
        writeTag(_writer, method, link.getURL(scheme, null, portI, null, false));
        
        // For XHTML compatibility
        _writer.attribute("id", formId);


        if (_encodingType != null)
            _writer.attribute("enctype", _encodingType);


        // Write out event handlers collected during the rendering.


        emitEventHandlers(formId);


        informalParametersRenderer.render(_writer, _cycle);


        // Finish the <form> tag


        _writer.println();


        writeHiddenFields();


        // Close the nested writer, inserting its contents.
        
        nested.close();


        // Close the <form> tag.


        _writer.end();

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     * {@link org.apache.tapestry.wml.GoFormSupportImpl}.
     */
    
    protected void writeHiddenFields()
    {
        IMarkupWriter writer = getHiddenFieldWriter();
        
        writer.begin("div");
        writer.attribute("style", "display:none;");
        writer.attribute("id", _form.getName() + "hidden");
        
        writeHiddenFieldList(writer);
        
        writer.end();
    }

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    public static final ILinkRenderer RENDERER = new FormLinkRenderer();


    public void renderLink(IMarkupWriter writer, IRequestCycle cycle,
            ILinkComponent linkComponent)
    {
        IMarkupWriter wrappedWriter = null;


        if (cycle.getAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME) != null)
            throw new ApplicationRuntimeException(Tapestry
                    .getMessage("AbstractLinkComponent.no-nesting"),
                    linkComponent, null, null);


        cycle.setAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME,
                linkComponent);
        
        String formName = cycle.getUniqueId("LinkForm");
        
        boolean hasBody = getHasBody();


        boolean disabled = linkComponent.isDisabled();


        if (!disabled && !cycle.isRewinding())
        {
            ILink l = linkComponent.getLink(cycle);
            String anchor = linkComponent.getAnchor();


            Body body = (Body) TapestryUtils.getPageRenderSupport(cycle, linkComponent);


            String function = generateFormFunction(formName, l, anchor);
            body.addBodyScript(linkComponent, function);


            if (hasBody)
                writer.begin(getElement());
            else writer.beginEmpty(getElement());


            writer.attribute(getUrlAttribute(), "javascript: document."
                    + formName + ".submit();");


            beforeBodyRender(writer, cycle, linkComponent);


            // Allow the wrapped components a chance to render.
            // Along the way, they may interact with this component
            // and cause the name variable to get set.


            wrappedWriter = writer.getNestedWriter();
        }
        else wrappedWriter = writer;


        if (hasBody) linkComponent.renderBody(wrappedWriter, cycle);


        if (!disabled && !cycle.isRewinding())
        {
            afterBodyRender(writer, cycle, linkComponent);


            linkComponent.renderAdditionalAttributes(writer, cycle);


            if (hasBody)
            {
                wrappedWriter.close();


                // Close the <element> tag


                writer.end();
            }

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            writer.attribute("onclick", onclick);
        }
        
        component.renderAdditionalAttributes(writer, cycle);


        IMarkupWriter wrappedWriter = writer.getNestedWriter();


        component.renderBody(wrappedWriter, cycle);


        wrappedWriter.close();


        writer.end();


        cycle.removeAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME);
    }

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    public static final ILinkRenderer SHARED_INSTANCE = new DefaultLinkRenderer();


    public void renderLink(IMarkupWriter writer, IRequestCycle cycle,
            ILinkComponent linkComponent)
    {
        IMarkupWriter wrappedWriter = null;


        if (cycle.getAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME) != null)
            throw new ApplicationRuntimeException(LinkMessages.noNesting(),
                    linkComponent, null, null);


        cycle.setAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME,
                linkComponent);
        
        boolean hasBody = getHasBody();


        boolean disabled = linkComponent.isDisabled() || cycle.isRewinding();


        if (!disabled)
        {
            if (hasBody)
                writer.begin(getElement());
            else 
                writer.beginEmpty(getElement());
            
            writer.attribute(getUrlAttribute(), constructURL(linkComponent,
                    cycle));
            
            String target = linkComponent.getTarget();
            
            if (HiveMind.isNonBlank(target))
                writer.attribute(getTargetAttribute(), target);
            
            beforeBodyRender(writer, cycle, linkComponent);
            
            // Allow the wrapped components a chance to render.
            // Along the way, they may interact with this component
            // and cause the name variable to get set.
            
            wrappedWriter = writer.getNestedWriter();
        } else 
            wrappedWriter = writer;
        
        if (hasBody) 
            linkComponent.renderBody(wrappedWriter, cycle);
        
        if (!disabled) {
            
            afterBodyRender(writer, cycle, linkComponent);
            
            linkComponent.renderAdditionalAttributes(writer, cycle);
            
            if (hasBody) {
                wrappedWriter.close();
                
                // Close the <element> tag
                
                writer.end();
            } else

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