Examples of com.volantis.mcs.protocols.DeviceLayoutContext$FormatInstanceCollector

com.volantis.mcs.protocols.DeviceLayoutContext
This visits the format tree, pre-creating and collecting the zero dimension format instances for those formats which are accessible directly via PAPI - i.e Panes, Fragments and FormFragments (but not Dissecting Panes).
These format instances are then used to create the PAPI Facades for the formats before being given back to the user.
This is required because the all the PAPI accessible formats are required to be available as soon as the canvas is created, rather than as they are individually referenced in the XDIME/PAPI, as would be the case otherwise.
NOTE: This is rather nasty, for the following reasons:
- The original idea of being able to access formats via PAPI is dubious.
- The PAPI accessible Formats are given Facade classes in the PAPI package with inconsistent names (some of which duplicate the related format names).
- Since the PAPI formats were added, we have added format iterators which confuses the issue. For example, it is impossible to provide access to all the format instances in an iterated format as we do not know how many there will be.
- It relies on the fact that we can use the zero dimension format context instance to represent all the format instance instances. This only works for Panes because the context is not used and the values are stored directly into the pane (which is itself a bug), and for Fragments and FormFragments because these are currently not iterated. The real fix for this is to invent an object which stores the state which is common to all format instances.
- Support for Dissecting Panes is implemented differently, and in a more standard fashion, for some reason(s) which are now lost in the mists of time. It relies on the normal FormatScopes for looking up the pane and pane context.
@see com.volantis.mcs.papi.PaneFormat @see com.volantis.mcs.papi.Fragment @see com.volantis.mcs.papi.FormFragment @see com.volantis.mcs.papi.DissectingPane @see com.volantis.mcs.context.MarinerRequestContext#getPaneFormat @see com.volantis.mcs.context.MarinerRequestContext#getPaneFormats @see com.volantis.mcs.context.MarinerRequestContext#getFragment @see com.volantis.mcs.context.MarinerRequestContext#getFragments @see com.volantis.mcs.context.MarinerRequestContext#getFormFragment @see com.volantis.mcs.context.MarinerRequestContext#getDissectingPane

        addCardEvents(dom, attributes);


        // Store emulated emphasis tag markup in wml.card.beforebody
        // This ensure that native markup for onevent and timer elements
        // appears first.
        DeviceLayoutContext dlc = context.getDeviceLayoutContext();
        dom = (DOMOutputBuffer)dlc.getOutputBuffer(
            NativeMarkupAttributes.WML_CARD_BEFOREBODY, true);


        // NOTE: stylistic markup emulation handled in openLayout instead.
    }

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         * another page.
         *
         * writeLayout() calls the DeviceLayoutRenderer which calls this method.
         *
         */
        DeviceLayoutContext dlc = context.getDeviceLayoutContext();
        dom.addOutputBuffer((DOMOutputBuffer)dlc.getOutputBuffer(
            NativeMarkupAttributes.WML_CARD_ONEVENT, false));
        dom.addOutputBuffer((DOMOutputBuffer)dlc.getOutputBuffer(
            NativeMarkupAttributes.WML_CARD_TIMER, false));
        dom.addOutputBuffer((DOMOutputBuffer)dlc.getOutputBuffer(
            NativeMarkupAttributes.WML_CARD_BEFOREBODY, false));


        // NOTE: This handles opening the stylistic emulation markup for
        // both normal and inclusion canvases. We need to do it here to
        // respect the semantics for output defined by the native markup

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        if (attributes.isOverlay ()) {
            if(logger.isDebugEnabled()){
                logger.debug ("Generating overlay inclusion in its own card");
            }
            // Get the current device layout context.
            DeviceLayoutContext deviceLayoutContext =
                    context.getDeviceLayoutContext();
            deviceLayoutContext.setOverlay(true);


            openCard(dom, attributes);
        }


        // NOTE: stylistic markup emulation handled in openLayout instead.

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     * written.
     */
    public void beginNestedInclusion() {


        // Get the current device layout context.
        DeviceLayoutContext deviceLayoutContext
            = context.getDeviceLayoutContext();


        // If this inclusion is an overlay then it is a separate card.
        if (deviceLayoutContext.isOverlay()) {
            if (logger.isDebugEnabled()) {
                logger.debug("Generating overlay inclusion in its own card");
            }




            DOMOutputBuffer dom;
            if (deviceLayoutContext.isInRegion()) {
                if (cardsInRegions == null) {
                    cardsInRegions = getExtraBuffer(CARDS_IN_REGIONS,
                                                    true);
                }
                dom = cardsInRegions;

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     * region in the including page.
     */
    public void endNestedInclusion() {


        // Get the current device layout context.
        DeviceLayoutContext deviceLayoutContext
            = context.getDeviceLayoutContext();


        // If this inclusion is an overlay then it is a separate card.
        if (deviceLayoutContext.isOverlay()) {
            if (logger.isDebugEnabled()) {
                logger.debug("Generating overlay inclusion in its own card");




                // If the card is not in a region then we have to add it into
                // a separate buffer


            }
            DOMOutputBuffer dom;
            if (deviceLayoutContext.isInRegion()) {
                dom = cardsInRegions;
            } else {
                dom = cardsNotInRegions;
            }
            context.popOutputBuffer(dom);

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        } else if (NativeMarkupAttributes.WML_CARD_TIMER.equals(target)) {
            if (logger.isDebugEnabled()) {
                logger.debug("native markup goes in wml.card.timer");
            }


            DeviceLayoutContext dlc = context.getDeviceLayoutContext();
            buffer = dlc.getOutputBuffer(
                NativeMarkupAttributes.WML_CARD_TIMER,
                true);
        } else if (NativeMarkupAttributes.WML_CARD_ONEVENT.equals(target)) {
            if (logger.isDebugEnabled()) {
                logger.debug("native markup goes in wml.card.onevent");
            }


            DeviceLayoutContext dlc = context.getDeviceLayoutContext();
            buffer = dlc.getOutputBuffer(
                NativeMarkupAttributes.WML_CARD_ONEVENT, true);
        } else if (NativeMarkupAttributes.WML_CARD_BEFOREBODY.equals(target)) {
            if (logger.isDebugEnabled()) {
                logger.debug("native markup goes in wml.card.beforebody");
            }


            DeviceLayoutContext dlc = context.getDeviceLayoutContext();
            buffer = dlc.getOutputBuffer(
                NativeMarkupAttributes.WML_CARD_BEFOREBODY, true);
        } else {
            buffer = super.getNativeMarkupOutputBuffer(attributes);
        }

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        MarinerPageContext pageContext =
                ContextInternals.getMarinerPageContext(
                        context.getInitialRequestContext());


        // Get the specified container - may be null.
        DeviceLayoutContext layoutContext =
                getSpecifiedLayout(layout, pageContext);


        // If a layout was specified, then ensure it is allowed in this context.
        RegionInstance containingRegion = null;
        if (layoutContext != null) {

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     * was specified.
     */
    private DeviceLayoutContext getSpecifiedLayout(
            StyleValue layout, MarinerPageContext pageContext) {


        DeviceLayoutContext layoutContext = null;


        // Process an mcs-layout style first.
        if (layout instanceof StyleString) {
            StyleString layoutString = (StyleString) layout;

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                // if no new layout is specified and the container name is the
                // same as the name of the current container then we can use the
                // current container
                specifiedCurrentContainer = true;
            } else {
                DeviceLayoutContext layoutContext = specifiedLayout;
                if (layoutContext == null) {
                    // If none was specified, then try and find the format in
                    // the current layout.
                    layoutContext = pageContext.getDeviceLayoutContext();
                }
                Format format = layoutContext.getFormat(containerName,
                        FormatNamespace.CONTAINER);


                if (format != null) {
                    int dimensions = format.getDimensions();
                    NDimensionalIndex index;
                    if (dimensions > 0) {
                        int[] indeces = new int[dimensions];
                        index = new NDimensionalIndex(indeces);
                    } else {
                        index = NDimensionalIndex.ZERO_DIMENSIONS;
                    }


                    instance = (ContainerInstance) layoutContext.
                            getFormatInstance(format, index);
                }
            }
        } else if (container instanceof StyleKeyword) {
            if (container == MCSContainerKeywords.CURRENT) {

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        } catch (RepositoryException e) {
            // An appropriate device layout could not be found so fail.
            throw new XDIMEException(e);
        }


        DeviceLayoutContext deviceLayoutContext =
                new DeviceLayoutContext();


        DeviceLayoutContext idlc
                = pageContext.getDeviceLayoutContext();
        deviceLayoutContext.setIncludingDeviceLayoutContext(idlc);
        deviceLayoutContext.setInRegion(true);


        deviceLayoutContext.setMarinerPageContext(pageContext);

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