Examples with WebXmlRenderContext com.github.bordertech.wcomponents.servlet.WebXmlRenderContext used on opensource projects

Example 1 with WebXmlRenderContext

use of com.github.bordertech.wcomponents.servlet.WebXmlRenderContext in project wcomponents by BorderTech.

the class AbstractContainerHelper method render.

/**
 * Support standard processing of the render phase of a request.
 *
 * @throws IOException IO Exception
 */
public void render() throws IOException {
    if (isDisposed()) {
        LOG.debug("Skipping render phase.");
        return;
    }
    try {
        // Check user context has been prepared
        if (getNewConversation() == null) {
            throw new IllegalStateException("User context has not been prepared before the render phase");
        }
        prepareRender();
        UIContext uic = getUIContext();
        if (uic == null) {
            throw new IllegalStateException("No user context set for the render phase.");
        }
        UIContextHolder.pushContext(uic);
        prepareRequest();
        // Handle errors from the action phase now.
        if (havePropogatedError()) {
            handleError(getPropogatedError());
            return;
        }
        WComponent uiComponent = getUI();
        if (uiComponent == null) {
            throw new SystemException("No UI Component exists.");
        }
        Environment environment = uiComponent.getEnvironment();
        if (environment == null) {
            throw new SystemException("No WEnvironment exists.");
        }
        getInterceptor().attachResponse(getResponse());
        getInterceptor().preparePaint(getRequest());
        String contentType = getUI().getHeaders().getContentType();
        Response response = getResponse();
        response.setContentType(contentType);
        addGenericHeaders(uic, getUI());
        PrintWriter writer = getPrintWriter();
        getInterceptor().paint(new WebXmlRenderContext(writer, uic.getLocale()));
        // The following only matters for a Portal context
        String title = uiComponent instanceof WApplication ? ((WApplication) uiComponent).getTitle() : null;
        if (title != null) {
            setTitle(title);
        }
    } catch (Escape esc) {
        LOG.debug("Escape performed during render phase.");
        handleEscape(esc);
    } catch (Throwable t) {
        // We try not to let any exception propagate to container.
        String message = "Caught exception during render phase.";
        LOG.error(message, t);
        handleError(t);
    } finally {
        UIContextHolder.reset();
        dispose();
    }
}

Example 2 with WebXmlRenderContext

use of com.github.bordertech.wcomponents.servlet.WebXmlRenderContext in project wcomponents by BorderTech.

the class InterceptorComponent method render.

/**
 * Renders the given component to a web-XML String and returns it. This occurs outside the context of a Servlet.
 *
 * @param component the component to render.
 * @return the rendered output as a String.
 */
protected static String render(final WebComponent component) {
    StringWriter stringWriter = new StringWriter();
    PrintWriter printWriter = new PrintWriter(stringWriter);
    component.paint(new WebXmlRenderContext(printWriter));
    printWriter.flush();
    String content = stringWriter.toString();
    return content;
}

Example 3 with WebXmlRenderContext

use of com.github.bordertech.wcomponents.servlet.WebXmlRenderContext in project wcomponents by BorderTech.

the class WebUtilities method render.

/**
 * Renders the given WComponent to a String outside of the context of a Servlet. This is good for getting hold of
 * the XML for debugging, unit testing etc. Also it is good for using the WComponent framework as a more generic
 * templating framework.
 *
 * @param request the request being responded to.
 * @param component the root WComponent to render.
 * @return the rendered output as a String.
 */
public static String render(final Request request, final WComponent component) {
    boolean needsContext = UIContextHolder.getCurrent() == null;
    if (needsContext) {
        UIContextHolder.pushContext(new UIContextImpl());
    }
    try {
        StringWriter buffer = new StringWriter();
        component.preparePaint(request);
        try (PrintWriter writer = new PrintWriter(buffer)) {
            component.paint(new WebXmlRenderContext(writer));
        }
        return buffer.toString();
    } finally {
        if (needsContext) {
            UIContextHolder.popContext();
        }
    }
}

Example 4 with WebXmlRenderContext

use of com.github.bordertech.wcomponents.servlet.WebXmlRenderContext in project wcomponents by BorderTech.

the class AjaxInterceptor method paintResponse.

/**
 * Paint the ajax response.
 *
 * @param renderContext the render context
 * @param operation the ajax operation
 */
private void paintResponse(final RenderContext renderContext, final AjaxOperation operation) {
    WebXmlRenderContext webRenderContext = (WebXmlRenderContext) renderContext;
    XmlStringBuilder xml = webRenderContext.getWriter();
    // Get trigger's context
    ComponentWithContext trigger = AjaxHelper.getCurrentTriggerAndContext();
    if (trigger == null) {
        throw new SystemException("No context available for trigger " + operation.getTriggerId());
    }
    for (String targetId : operation.getTargets()) {
        ComponentWithContext target;
        if (targetId.equals(operation.getTriggerId())) {
            target = trigger;
        } else {
            target = WebUtilities.getComponentById(targetId, true);
            if (target == null) {
                LOG.warn("Could not find ajax target to render [" + targetId + "]");
                continue;
            }
        }
        UIContextHolder.pushContext(target.getContext());
        try {
            xml.appendTagOpen("ui:ajaxtarget");
            xml.appendAttribute("id", targetId);
            xml.appendAttribute("action", operation.getAction().getDesc());
            xml.appendClose();
            target.getComponent().paint(renderContext);
            xml.appendEndTag("ui:ajaxtarget");
        } finally {
            UIContextHolder.popContext();
        }
    }
}

Example 5 with WebXmlRenderContext

use of com.github.bordertech.wcomponents.servlet.WebXmlRenderContext in project wcomponents by BorderTech.

the class DebugStructureInterceptor method paint.

/**
 * Override paint to render additional information for debugging purposes.
 *
 * @param renderContext the renderContext to send the output to.
 */
@Override
public void paint(final RenderContext renderContext) {
    super.paint(renderContext);
    if (!DebugUtil.isDebugFeaturesEnabled() || !(renderContext instanceof WebXmlRenderContext)) {
        return;
    }
    XmlStringBuilder xml = ((WebXmlRenderContext) renderContext).getWriter();
    xml.appendTag("ui:debug");
    writeDebugInfo(getUI(), xml);
    xml.appendEndTag("ui:debug");
}