Examples with AjaxHandler org.apache.myfaces.view.facelets.tag.faces.core.AjaxHandler used on opensource projects

Example 1 with AjaxHandler

use of org.apache.myfaces.view.facelets.tag.faces.core.AjaxHandler in project myfaces by apache.

the class ComponentTagHandlerDelegate method apply.

/**
 * Method handles UIComponent tree creation in accordance with the JSF 1.2 spec.
 * <ol>
 * <li>First determines this UIComponent's id by calling {@link #getId(FaceletContext) getId(FaceletContext)}.</li>
 * <li>Search the parent for an existing UIComponent of the id we just grabbed</li>
 * <li>If found, {@link FaceletCompositionContext#markForDeletion(UIComponent) mark} its children for deletion.</li>
 * <li>If <i>not</i> found, call {@link #createComponent(FaceletContext) createComponent}.
 * <ol>
 * <li>Only here do we apply TagHandler#setAttributes(FaceletCompositionContext, Object)</li>
 * <li>Set the UIComponent's id</li>
 * <li>Set the RendererType of this instance</li>
 * </ol>
 * </li>
 * <li>Now apply the nextHandler, passing the UIComponent we've created/found.</li>
 * <li>Now add the UIComponent to the passed parent</li>
 * <li>Lastly, if the UIComponent already existed (found),
 * then #finalizeForDeletion(FaceletCompositionContext, UIComponent)
 * for deletion.</li>
 * </ol>
 *
 * See jakarta.faces.view.facelets.FaceletHandler#apply(jakarta.faces.view.facelets.FaceletContext,
 * jakarta.faces.component.UIComponent)
 *
 * @throws TagException
 *             if the UIComponent parent is null
 */
@SuppressWarnings("unchecked")
@Override
public void apply(FaceletContext ctx, UIComponent parent) throws IOException {
    // make sure our parent is not null
    if (parent == null) {
        throw new TagException(_delegate.getTag(), "Parent UIComponent was null");
    }
    FacesContext facesContext = ctx.getFacesContext();
    // possible facet scoped
    String facetName = this.getFacetName(ctx, parent);
    // our id
    String id = ctx.generateUniqueId(_delegate.getTagId());
    // Cast to use UniqueIdVendor stuff
    FaceletCompositionContext mctx = (FaceletCompositionContext) FaceletCompositionContext.getCurrentInstance(ctx);
    // grab our component
    UIComponent c = null;
    // Used to preserve the original parent. Note when the view is being refreshed, the real parent could be
    // another component.
    UIComponent oldParent = parent;
    if (mctx.isRefreshingSection()) {
        if (_relocatableResourceHandler != null) {
            c = _relocatableResourceHandler.findChildByTagId(ctx, parent, id);
        } else {
            if (facetName != null) {
                c = ComponentSupport.findChildInFacetByTagId(parent, id, facetName);
            } else {
                c = ComponentSupport.findChildInChildrenByTagId(parent, id);
            }
        }
    }
    boolean componentFound = false;
    if (c != null) {
        componentFound = true;
        // preserve the same context
        if (_delegate.getBinding() != null && c.getAttributes().containsKey(FaceletDynamicComponentRefreshTransientBuildEvent.DYNAMIC_COMPONENT_BINDING_NEEDS_REFRESH)) {
            VisitContext visitContext = (VisitContext) mctx.getVisitContextFactory().getVisitContext(facesContext, null, MyFacesVisitHints.SET_SKIP_ITERATION);
            c.visitTree(visitContext, PublishFaceletDynamicComponentRefreshTransientBuildCallback.INSTANCE);
        }
        mctx.incrementUniqueComponentId();
        // mark all children for cleaning
        if (log.isLoggable(Level.FINE)) {
            log.fine(_delegate.getTag() + " Component[" + id + "] Found, marking children for cleanup");
        }
        // The call for mctx.markForDeletion(c) is always necessary, because
        // component resource relocation occur as an effect of PostAddToViewEvent,
        // so at this point it is unknown if the component was relocated or not.
        mctx.markForDeletion(c);
        if (_relocatableResourceHandler != null) {
            mctx.markRelocatableResourceForDeletion(c);
        }
    } else {
        c = this.createComponent(ctx);
        if (log.isLoggable(Level.FINE)) {
            log.fine(_delegate.getTag() + " Component[" + id + "] Created: " + c.getClass().getName());
        }
        _delegate.setAttributes(ctx, c);
        // mark it owned by a facelet instance
        c.getAttributes().put(ComponentSupport.MARK_CREATED, id);
        if (facesContext.isProjectStage(ProjectStage.Development)) {
            c.getAttributes().put(UIComponent.VIEW_LOCATION_KEY, _delegate.getTag().getLocation());
        }
        // assign our unique id
        if (this._id != null) {
            mctx.incrementUniqueComponentId();
            c.setId(this._id.getValue(ctx));
        } else {
            String componentId = mctx.generateUniqueComponentId();
            UniqueIdVendor uniqueIdVendor = mctx.getUniqueIdVendorFromStack();
            if (uniqueIdVendor == null) {
                uniqueIdVendor = facesContext.getViewRoot();
                if (uniqueIdVendor == null) {
                    // facesContext.getViewRoot() returns null here if we are in
                    // phase restore view, so we have to try to get the view root
                    // via the method in ComponentSupport and our parent
                    uniqueIdVendor = ComponentSupport.getViewRoot(ctx, parent);
                }
            }
            if (uniqueIdVendor != null) {
                // UIViewRoot implements UniqueIdVendor, so there is no need to cast to UIViewRoot
                // and call createUniqueId()
                String uid = uniqueIdVendor.createUniqueId(facesContext, componentId);
                c.setId(uid);
            }
        }
        if (this._rendererType != null) {
            c.setRendererType(this._rendererType);
        }
        // hook method
        _delegate.onComponentCreated(ctx, c, parent);
        if (_relocatableResourceHandler != null && _relocatableResourceHandler instanceof ComponentRelocatableResourceHandler) {
            UIComponent parentCompositeComponent = mctx.getCompositeComponentFromStack();
            if (parentCompositeComponent != null) {
                c.getAttributes().put(CompositeComponentELUtils.LOCATION_KEY, parentCompositeComponent.getAttributes().get(CompositeComponentELUtils.LOCATION_KEY));
            }
        }
        if (mctx.isRefreshingTransientBuild() && _relocatableResourceHandler != null) {
            mctx.markRelocatableResourceForDeletion(c);
        }
    }
    c.pushComponentToEL(facesContext, c);
    if (c instanceof UniqueIdVendor) {
        mctx.pushUniqueIdVendorToStack((UniqueIdVendor) c);
    }
    if (mctx.isDynamicComponentTopLevel()) {
        mctx.setDynamicComponentTopLevel(false);
        _delegate.applyNextHandler(ctx, c);
        mctx.setDynamicComponentTopLevel(true);
    } else {
        // first allow c to get populated
        _delegate.applyNextHandler(ctx, c);
    }
    boolean oldProcessingEvents = facesContext.isProcessingEvents();
    // finish cleaning up orphaned children
    if (componentFound && !mctx.isDynamicComponentTopLevel()) {
        mctx.finalizeForDeletion(c);
        if (mctx.isRefreshingSection()) {
            facesContext.setProcessingEvents(false);
            if (_relocatableResourceHandler != null && parent != null && !parent.equals(c.getParent())) {
                // Replace parent with the relocated parent.
                parent = c.getParent();
                // Since we changed the parent, the facetName becomes invalid, because it points
                // to the component before relocation. We need to find the right facetName (if any) so we can
                // refresh the component properly.
                UIComponent c1 = ComponentSupport.findChildInChildrenByTagId(parent, id);
                if (c1 == null) {
                    facetName = ComponentSupport.findChildInFacetsByTagId(parent, id);
                } else {
                    facetName = null;
                }
            }
            ComponentSupport.setCachedFacesContext(c, facesContext);
        }
        if (facetName == null) {
            parent.getChildren().remove(c);
        } else {
            ComponentSupport.removeFacet(ctx, parent, c, facetName);
        }
        if (mctx.isRefreshingSection()) {
            ComponentSupport.setCachedFacesContext(c, null);
            facesContext.setProcessingEvents(oldProcessingEvents);
        }
    }
    if (!componentFound) {
        if (c instanceof ClientBehaviorHolder && !UIComponent.isCompositeComponent(c)) {
            Iterator<AjaxHandler> it = ((AbstractFaceletContext) ctx).getAjaxHandlers();
            if (it != null) {
                while (it.hasNext()) {
                    it.next().applyAttachedObject(facesContext, c);
                }
            }
        }
        if (c instanceof EditableValueHolder) {
            // add default validators here, because this feature
            // is only available in facelets (see MYFACES-2362 for details)
            addEnclosingAndDefaultValidators(ctx, mctx, facesContext, (EditableValueHolder) c);
        }
    }
    _delegate.onComponentPopulated(ctx, c, oldParent);
    if (!mctx.isDynamicComponentTopLevel() || !componentFound) {
        if (componentFound && mctx.isRefreshingSection()) {
            facesContext.setProcessingEvents(false);
            ComponentSupport.setCachedFacesContext(c, facesContext);
        }
        if (facetName == null) {
            parent.getChildren().add(c);
        } else {
            ComponentSupport.addFacet(ctx, parent, c, facetName);
        }
        if (componentFound && mctx.isRefreshingSection()) {
            ComponentSupport.setCachedFacesContext(c, null);
            facesContext.setProcessingEvents(oldProcessingEvents);
        }
    }
    if (c instanceof UniqueIdVendor) {
        mctx.popUniqueIdVendorToStack();
    }
    c.popComponentFromEL(facesContext);
    if (mctx.isMarkInitialState()) {
        // Call it only if we are using partial state saving
        c.markInitialState();
    }
}

Example 2 with AjaxHandler

use of org.apache.myfaces.view.facelets.tag.faces.core.AjaxHandler in project myfaces by apache.

the class CompositeComponentResourceTagHandler method applyCompositeComponentFacelet.

protected void applyCompositeComponentFacelet(FaceletContext faceletContext, UIComponent compositeComponentBase) throws IOException {
    FaceletCompositionContext mctx = FaceletCompositionContext.getCurrentInstance(faceletContext);
    AbstractFaceletContext actx = (AbstractFaceletContext) faceletContext;
    UIPanel compositeFacetPanel = (UIPanel) compositeComponentBase.getFacets().get(UIComponent.COMPOSITE_FACET_NAME);
    if (compositeFacetPanel == null) {
        compositeFacetPanel = (UIPanel) faceletContext.getFacesContext().getApplication().createComponent(faceletContext.getFacesContext(), UIPanel.COMPONENT_TYPE, null);
        compositeFacetPanel.getAttributes().put(ComponentSupport.COMPONENT_ADDED_BY_HANDLER_MARKER, Boolean.TRUE);
        compositeComponentBase.getFacets().put(UIComponent.COMPOSITE_FACET_NAME, compositeFacetPanel);
        // Set an id to the created facet component, to prevent id generation and make
        // partial state saving work without problem.
        UniqueIdVendor uniqueIdVendor = mctx.getUniqueIdVendorFromStack();
        if (uniqueIdVendor == null) {
            uniqueIdVendor = ComponentSupport.getViewRoot(faceletContext, compositeComponentBase);
        }
        if (uniqueIdVendor != null) {
            // UIViewRoot implements UniqueIdVendor, so there is no need to cast to UIViewRoot
            // and call createUniqueId()
            String uid = uniqueIdVendor.createUniqueId(faceletContext.getFacesContext(), mctx.getSharedStringBuilder().append(compositeComponentBase.getId()).append("__f_").append("cc_facet").toString());
            compositeFacetPanel.setId(uid);
        }
    }
    // Before call applyCompositeComponent we need to add ajax behaviors
    // to the current compositeComponentBase. Note that super.applyNextHandler()
    // has already been called, but this point is before vdl.retargetAttachedObjects,
    // so we can't but this on ComponentTagHandlerDelegate, if we want this to be
    // applied correctly.
    Iterator<AjaxHandler> it = ((AbstractFaceletContext) faceletContext).getAjaxHandlers();
    if (it != null) {
        while (it.hasNext()) {
            mctx.addAttachedObjectHandler(compositeComponentBase, it.next());
        }
    }
    VariableMapper orig = faceletContext.getVariableMapper();
    try {
        faceletContext.setVariableMapper(new VariableMapperWrapper(orig));
        actx.pushCompositeComponentClient(this);
        Resource resourceForCurrentView = faceletContext.getFacesContext().getApplication().getResourceHandler().createResource(_resource.getResourceName(), _resource.getLibraryName());
        if (resourceForCurrentView != null) {
            // Wrap it for serialization.
            resourceForCurrentView = new CompositeResouceWrapper(resourceForCurrentView);
        } else {
            // composite component does not exists.
            throw new TagException(getTag(), "Composite Component " + getTag().getQName() + " requires a default instance that can be found by the installed ResourceHandler.");
        }
        actx.applyCompositeComponent(compositeFacetPanel, resourceForCurrentView);
    } finally {
        actx.popCompositeComponentClient();
        faceletContext.setVariableMapper(orig);
    }
}