Example usage for com.google.gwt.dom.client NodeList getItem

List of usage examples for com.google.gwt.dom.client NodeList getItem

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Introduction

In this page you can find the example usage for com.google.gwt.dom.client NodeList getItem.

Prototype

public T getItem(int index)

Source Link

Usage

From source file:org.vectomatic.svg.edit.client.engine.SVGModel.java

License:Open Source License

/**
 * Completes the specified SVG subtree so that all the proper SVG elements have
 * an associated title and desc elements
 * @param root The SVG subtree to complete
 *//*from  w w  w .  j  a v  a  2 s  .  c o m*/
public void createTitleDesc(SVGElement root) {
    // Perform a DFS of the tree to collect all the SVG elements
    // which can have a title and desc but do not yet have one
    List<SVGElement> incompleteElements = new ArrayList<SVGElement>();
    Stack<SVGElement> stack = new Stack<SVGElement>();
    stack.push(root);
    while (stack.size() > 0) {
        SVGElement element = stack.pop();
        if (hasTitleDesc(element) && (DOMHelper.evaluateNodeXPath(element, TITLE_PROPERTY.getXPath(),
                SVGPrefixResolver.INSTANCE) == null
                || DOMHelper.evaluateNodeXPath(element, DESC_PROPERTY.getXPath(),
                        SVGPrefixResolver.INSTANCE) == null)) {
            incompleteElements.add(element);
        }
        NodeList<Node> childNodes = element.getChildNodes();
        for (int i = 0, length = childNodes.getLength(); i < length; i++) {
            Node child = childNodes.getItem(i);
            if (child.getNodeType() == Node.ELEMENT_NODE) {
                Element childElement = child.cast();
                if (SVGConstants.SVG_NAMESPACE_URI.equals(DOMHelper.getNamespaceURI(childElement))) {
                    stack.push((SVGElement) childElement.cast());
                }
            }
        }
    }

    // Create the missing desc and titles
    SVGDocument document = root.getOwnerDocument().cast();
    for (SVGElement element : incompleteElements) {
        SVGTitleElement title = DOMHelper.evaluateNodeXPath(element, TITLE_PROPERTY.getXPath(),
                SVGPrefixResolver.INSTANCE);
        if (title == null) {
            title = DOMHelper
                    .createElementNS(document, SVGConstants.SVG_NAMESPACE_URI, SVGConstants.SVG_TITLE_TAG)
                    .cast();
            title.appendChild(document.createTextNode(generateName(element)));
            Node firstChild = element.getFirstChild();
            if (firstChild == null) {
                element.appendChild(title);
            } else {
                element.insertBefore(title, firstChild);
            }
        }
        SVGDescElement desc = DOMHelper.evaluateNodeXPath(element, DESC_PROPERTY.getXPath(),
                SVGPrefixResolver.INSTANCE);
        if (desc == null) {
            desc = DOMHelper
                    .createElementNS(document, SVGConstants.SVG_NAMESPACE_URI, SVGConstants.SVG_DESC_TAG)
                    .cast();
            desc.appendChild(document.createTextNode(""));
            element.insertAfter(desc, title);
        }
    }
}

From source file:org.vectomatic.svg.edit.client.engine.SVGProcessor.java

License:Open Source License

public static int normalizeIds(OMSVGElement srcSvg) {
    docId++;//  w ww.  j  a v a  2 s  . com
    // Collect all the original element ids and replace them with a
    // normalized id
    int idIndex = 0;
    Map<String, Element> idToElement = new HashMap<String, Element>();
    Map<String, String> idToNormalizedId = new HashMap<String, String>();
    List<Element> queue = new ArrayList<Element>();
    queue.add(srcSvg.getElement());
    while (queue.size() > 0) {
        Element element = queue.remove(0);
        String id = element.getId();
        if (id != null) {
            idToElement.put(id, element);
            String normalizedId = "d" + docId + "_" + idIndex++;
            idToNormalizedId.put(id, normalizedId);
            element.setId(normalizedId);
        }
        NodeList<Node> childNodes = element.getChildNodes();
        for (int i = 0, length = childNodes.getLength(); i < length; i++) {
            Node childNode = childNodes.getItem(i);
            if (childNode.getNodeType() == Node.ELEMENT_NODE) {
                queue.add((Element) childNode.cast());
            }
        }
    }

    // Change all the attributes which are URI references
    Set<String> attNames = new HashSet<String>(Arrays.asList(new String[] { "clip-path", "mask", "marker-start",
            "marker-mid", "marker-end", "fill", "stroke", "filter", "cursor", "style" }));
    queue.add(srcSvg.getElement());
    IdRefTokenizer tokenizer = GWT.create(IdRefTokenizer.class);
    while (queue.size() > 0) {
        Element element = queue.remove(0);
        if (DOMHelper.hasAttributeNS(element, SVGConstants.XLINK_NAMESPACE_URI,
                SVGConstants.XLINK_HREF_ATTRIBUTE)) {
            String idRef = DOMHelper.getAttributeNS(element, SVGConstants.XLINK_NAMESPACE_URI,
                    SVGConstants.XLINK_HREF_ATTRIBUTE).substring(1);
            String normalizeIdRef = idToNormalizedId.get(idRef);
            DOMHelper.setAttributeNS(element, SVGConstants.XLINK_NAMESPACE_URI,
                    SVGConstants.XLINK_HREF_ATTRIBUTE, "#" + normalizeIdRef);
        }
        NamedNodeMap<Attr> attrs = DOMHelper.getAttributes(element);
        for (int i = 0, length = attrs.getLength(); i < length; i++) {
            Attr attr = attrs.item(i);
            if (attNames.contains(attr.getName())) {
                StringBuilder builder = new StringBuilder();
                tokenizer.tokenize(attr.getValue());
                IdRefTokenizer.IdRefToken token;
                while ((token = tokenizer.nextToken()) != null) {
                    String value = token.getValue();
                    if (token.getKind() == IdRefTokenizer.IdRefToken.DATA) {
                        builder.append(value);
                    } else {
                        value = idToNormalizedId.get(value);
                        builder.append(value == null ? token.getValue() : value);
                    }
                }
                attr.setValue(builder.toString());
            }
        }
        NodeList<Node> childNodes = element.getChildNodes();
        for (int i = 0, length = childNodes.getLength(); i < length; i++) {
            Node childNode = childNodes.getItem(i);
            if (childNode.getNodeType() == Node.ELEMENT_NODE) {
                queue.add((Element) childNode.cast());
            }
        }
    }
    return docId;
}

From source file:org.vectomatic.svg.samples.client.xpath.XPathSample.java

License:Open Source License

private void visit(Node node, Element parentSpan) {
    SpanElement span = doc.createSpanElement();
    nodeToSpan.put(node, span);//from  w w  w  .  ja  v  a2s .com

    parentSpan.appendChild(span);
    NodeList<Node> childNodes = node.getChildNodes();
    switch (node.getNodeType()) {
    case Node.ELEMENT_NODE: {
        Element element = node.<Element>cast();
        span.addClassName(css.element());

        // Populate the span with a start tag
        span.appendChild(createMarkup("<"));
        String tagName = element.getTagName();
        int index = tagName.indexOf(":");
        if (index != -1) {
            span.appendChild(doc.createTextNode(tagName.substring(0, index)));
            span.appendChild(createMarkup(":"));
            span.appendChild(doc.createTextNode(tagName.substring(index + 1)));
        } else {
            span.appendChild(doc.createTextNode(tagName));
        }

        // Create the attribute nodes spans
        NamedNodeMap<Attr> attributes = DOMHelper.getAttributes(element);
        for (int i = 0, length = attributes.getLength(); i < length; i++) {
            span.appendChild(doc.createTextNode(" "));

            SpanElement attrSpan = doc.createSpanElement();
            attrSpan.addClassName(css.attribute());
            span.appendChild(attrSpan);
            Attr attr = attributes.item(i);
            nodeToSpan.put(attr, attrSpan);

            String attrName = attr.getName();
            index = attrName.indexOf(":");
            if (index != -1) {
                attrSpan.appendChild(doc.createTextNode(attrName.substring(0, index)));
                attrSpan.appendChild(createMarkup(":"));
                attrSpan.appendChild(doc.createTextNode(attrName.substring(index + 1)));
            } else {
                attrSpan.appendChild(doc.createTextNode(attrName));
            }
            attrSpan.appendChild(createMarkup("=\""));
            attrSpan.appendChild(doc.createTextNode(attr.getValue()));
            attrSpan.appendChild(createMarkup("\""));
        }
        span.appendChild(createMarkup(childNodes.getLength() > 0 ? ">" : "/>"));
    }
        break;
    case Node.TEXT_NODE: {
        // Populate span with text
        Text text = node.<Text>cast();
        span.addClassName(css.text());
        span.appendChild(doc.createTextNode(text.getData()));
    }
        break;
    }

    for (int i = 0, count = node.getChildCount(); i < count; i++) {
        visit(childNodes.getItem(i), span);
    }

    if (childNodes.getLength() > 0 && node.getNodeType() == Node.ELEMENT_NODE) {
        Element element = node.<Element>cast();
        span.addClassName(css.element());

        // Populate the span with a close tag
        span.appendChild(createMarkup("</"));
        String tagName = element.getTagName();
        int index = tagName.indexOf(":");
        if (index != -1) {
            span.appendChild(doc.createTextNode(tagName.substring(0, index)));
            span.appendChild(createMarkup(":"));
            span.appendChild(doc.createTextNode(tagName.substring(index + 1)));
        } else {
            span.appendChild(doc.createTextNode(tagName));
        }
        span.appendChild(createMarkup(">"));
    }
}

From source file:org.waveprotocol.wave.client.clipboard.Clipboard.java

License:Apache License

private String maybeGetAttributeFromContainer(Element srcContainer, String attribName) {
    NodeList<Element> elementsByClassName = DomHelper.getElementsByClassName(srcContainer, MAGIC_CLASSNAME);
    if (elementsByClassName != null && elementsByClassName.getLength() > 0) {
        return elementsByClassName.getItem(0).getAttribute(attribName);
    }/*  ww w .  j  a va 2  s .  c  o m*/
    return null;
}

From source file:org.waveprotocol.wave.client.common.util.DomHelper.java

License:Apache License

/**
 * Gets a list of descendants of e that match the given class name.
 *
 * If the browser has the native method, that will be called. Otherwise, it
 * traverses descendents of the given element and returns the list of elements
 * with matching classname.// w w w . j  av  a 2 s  .  co m
 *
 * @param e
 * @param className
 */
public static NodeList<Element> getElementsByClassName(Element e, String className) {
    if (QuirksConstants.SUPPORTS_GET_ELEMENTS_BY_CLASSNAME) {
        return getElementsByClassNameNative(e, className);
    } else {
        NodeList<Element> all = e.getElementsByTagName("*");
        if (all == null) {
            return null;
        }
        JsArray<Element> ret = JavaScriptObject.createArray().cast();
        for (int i = 0; i < all.getLength(); ++i) {
            Element item = all.getItem(i);
            if (className.equals(item.getClassName())) {
                ret.push(item);
            }
        }
        return ret.cast();
    }
}

From source file:org.waveprotocol.wave.client.wavepanel.view.dom.DomUtil.java

License:Apache License

/**
 * Returns the specified child element of the given element.
 * /*www .j  a  v  a 2s  .  c  o  m*/
 * @param parent parent element
 * @param childTypeString string representaton of the child element
 * @param toExclude element to be excluded from the search
 * @param startFrom element to start search with
 * @param step step to change the child index
 */
private static Element findChildElementExclusive(Element parent, String childTypeString, Element toExclude,
        Element startFrom, int step) {
    if (parent != null) {
        NodeList<Node> children = parent.getChildNodes();
        int begin;
        int end;
        if (step == +1) {
            begin = 0;
            end = children.getLength();
        } else {
            begin = children.getLength() - 1;
            end = -1;
        }
        boolean startFound = false;
        for (int i = begin; i != end; i += step) {
            Node child = children.getItem(i);
            if (child instanceof Element) {
                Element e = (Element) child;
                if (doesElementHaveTypeString(e, childTypeString)) {
                    if (e != toExclude) {
                        if (startFrom != null && !startFound) {
                            startFound = true;
                        } else {
                            return e;
                        }
                    }
                }
            }
        }
    }
    return null;
}

From source file:org.xwiki.gwt.dom.client.Element.java

License:Open Source License

/**
 * Expands inner elements with meta data.
 * /*from   www  .  jav a 2s  .com*/
 * @return this element
 */
public final Element expandInnerMetaData() {
    // Get all the inner elements with meta data.
    NodeList<com.google.gwt.dom.client.Element> elements = getElementsByTagName("*");
    List<Element> elementsWithMetaData = new ArrayList<Element>();
    for (int i = 0; i < elements.getLength(); i++) {
        Element element = (Element) elements.getItem(i);
        if (element.xHasAttribute(META_DATA_ATTR)) {
            elementsWithMetaData.add(element);
        }
    }
    // Expand meta data. Don't iterate the node list directly because it is live and meta data can contain elements.
    for (Element element : elementsWithMetaData) {
        // Remove the cached reference to the meta data document fragment because it might be shared by clone nodes.
        // We could have cloned the meta data document fragment but this is not reliable with some DOM nodes like
        // embedded objects.
        element.removeProperty(META_DATA_REF);
        element.expandMetaData(false);
    }
    return this;
}

From source file:org.xwiki.gwt.wysiwyg.client.plugin.font.DynamicListBoxPicker.java

License:Open Source License

/**
 * @return the additional option group, which contains all the options that were added dynamically
 *///from   w  w w .  j  a v a 2 s  .  com
private Element getAdditionalOptionGroup() {
    NodeList<Element> groups = getElement().getElementsByTagName("optgroup");
    if (groups.getLength() > 0) {
        // The last group should be the additional group.
        return groups.getItem(groups.getLength() - 1);
    } else {
        Element additionalGroup = getElement().getOwnerDocument().createOptGroupElement();
        additionalGroup.setAttribute("label", getAdditionalOptionGroupLabel());
        getElement().appendChild(additionalGroup);
        return additionalGroup;
    }
}

From source file:org.xwiki.gwt.wysiwyg.client.plugin.image.ImageMetaDataExtractor.java

License:Open Source License

/**
 * {@inheritDoc}/*from   ww w .  j a  va  2 s.  c om*/
 * 
 * @see InnerHTMLListener#onInnerHTMLChange(Element)
 */
public void onInnerHTMLChange(Element parent) {
    // look up all images in this subtree
    NodeList<com.google.gwt.dom.client.Element> imgs = parent.getElementsByTagName("img");
    for (int i = 0; i < imgs.getLength(); i++) {
        Element img = (Element) imgs.getItem(i);
        processElement(img);
    }
}

From source file:org.xwiki.gwt.wysiwyg.client.plugin.importer.IEPasteFilter.java

License:Open Source License

/**
 * {@inheritDoc}//from w  ww. j  av  a  2s  . c  o  m
 * 
 * @see PasteFilter#filter(Document)
 */
@Override
public void filter(Document document) {
    // We get the list of elements using a native DOM API instead of traversing the document because the DOM
    // document can be in an invalid state.
    NodeList<Element> descendants = document.getElementsByTagName("*");
    List<Element> nonHTMLElements = new ArrayList<Element>();
    for (int i = 0; i < descendants.getLength(); i++) {
        Element descendant = descendants.getItem(i);
        if (!StringUtils.isEmpty(descendant.getPropertyString("tagUrn"))) {
            nonHTMLElements.add(descendant);
        }
    }

    for (Element element : nonHTMLElements) {
        try {
            element.getParentNode().removeChild(element);
        } catch (Exception e) {
            // Skip this element. The DOM is in a bad state.
        }
    }

    super.filter(document);
}