Example usage for com.google.gwt.dom.client Document getElementsByTagName

Introduction

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

Prototype

public NodeList<Element> getElementsByTagName(String tagName) 

Source Link

Usage

From source file:com.calclab.emite.browser.client.DomAssist.java

License:Open Source License

/**
 * Retrieves all the div on the page that matches the given class
 * /*from  w  w  w.  ja  v a 2  s  .c  o  m*/
 * @param cssClass
 *            the css class to match
 * @return a list of elements
 */
public ArrayList<Element> findElementsByClass(final String cssClass) {
    Log.debug("Finding elements div." + cssClass);
    final ArrayList<Element> elements = new ArrayList<Element>();
    final Document document = Document.get();
    final NodeList<Element> divs = document.getElementsByTagName("div");
    for (int index = 0, total = divs.getLength(); index < total; index++) {
        final Element div = divs.getItem(index);
        final String[] classes = div.getClassName().split(" ");
        for (final String className : classes) {
            if (cssClass.equals(className)) {
                elements.add(div);
            }
        }
    }
    return elements;
}

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From source file:com.google.appinventor.client.editor.simple.components.MockForm.java

License:Open Source License

private static int getVerticalScrollbarWidth() {
    // We only calculate the vertical scroll bar width once, then we store it in the static field
    // verticalScrollbarWidth. If the field is non-zero, we don't need to calculate it again.
    if (verticalScrollbarWidth == 0) {
        // The following code will calculate (on the fly) the width of a vertical scroll bar.
        // We'll create two divs, one inside the other and add the outer div to the document body,
        // but off-screen where the user won't see it.
        // We'll measure the width of the inner div twice: (first) when the outer div's vertical
        // scrollbar is hidden and (second) when the outer div's vertical scrollbar is visible.
        // The width of inner div will be smaller when outer div's vertical scrollbar is visible.
        // By subtracting the two measurements, we can calculate the width of the vertical scrollbar.

        // I used code from the following websites as reference material:
        // http://jdsharp.us/jQuery/minute/calculate-scrollbar-width.php
        // http://www.fleegix.org/articles/2006-05-30-getting-the-scrollbar-width-in-pixels

        Document document = Document.get();

        // Create an outer div.
        DivElement outerDiv = document.createDivElement();
        Style outerDivStyle = outerDiv.getStyle();
        // Use absolute positioning and set the top/left so that it is off-screen.
        // We don't want the user to see anything while we do this calculation.
        outerDivStyle.setProperty("position", "absolute");
        outerDivStyle.setProperty("top", "-1000px");
        outerDivStyle.setProperty("left", "-1000px");
        // Set the width and height of the outer div to a fixed size in pixels.
        outerDivStyle.setProperty("width", "100px");
        outerDivStyle.setProperty("height", "50px");
        // Hide the outer div's scrollbar by setting the "overflow" property to "hidden".
        outerDivStyle.setProperty("overflow", "hidden");

        // Create an inner div and put it inside the outer div.
        DivElement innerDiv = document.createDivElement();
        Style innerDivStyle = innerDiv.getStyle();
        // Set the height of the inner div to be 4 times the height of the outer div so that a
        // vertical scrollbar will be necessary (but hidden for now) on the outer div.
        innerDivStyle.setProperty("height", "200px");
        outerDiv.appendChild(innerDiv);/*  w  w w  .  j  a  va 2  s .  c  o m*/

        // Temporarily add the outer div to the document body. It's off-screen so the user won't
        // actually see anything.
        Element bodyElement = document.getElementsByTagName("body").getItem(0);
        bodyElement.appendChild(outerDiv);

        // Get the width of the inner div while the outer div's vertical scrollbar is hidden.
        int widthWithoutScrollbar = innerDiv.getOffsetWidth();
        // Show the outer div's vertical scrollbar by setting the "overflow" property to "auto".
        outerDivStyle.setProperty("overflow", "auto");
        // Now, get the width of the inner div while the vertical scrollbar is visible.
        int widthWithScrollbar = innerDiv.getOffsetWidth();

        // Remove the outer div from the document body.
        bodyElement.removeChild(outerDiv);

        // Calculate the width of the vertical scrollbar by subtracting the two widths.
        verticalScrollbarWidth = widthWithoutScrollbar - widthWithScrollbar;
    }

    return verticalScrollbarWidth;
}

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From source file:com.google.appinventor.client.jsonp.JsonpConnection.java

License:Open Source License

/**
 * Sends a JSONP request by embedding a SCRIPT tag into the document.
 *
 * @param id the id used for the script tag and to identify the callback
 * @param request the request to be made
 * @param parameters the parameters for the request
 * @param function a function that transforms the response into the type
 *        that the callback needs//w w w.  jav  a  2 s.  c  o m
 * @param callback the callback that should be called with the transformed
 *        response
 */
private <T> void sendJsonpRequest(String id, String request, Map<String, Object> parameters,
        final Function<String, ? extends T> function, final AsyncCallback<T> callback) {
    Preconditions.checkNotNull(id);

    // Prepare an intermediate callback that converts the String result to T.
    if (callback != null) {
        Preconditions.checkNotNull(function);
        CALLBACKS.put(id, new AsyncCallback<String>() {
            @Override
            public void onSuccess(String jsonResult) {
                T result;
                try {
                    result = function.apply(jsonResult);
                } catch (RuntimeException e) {
                    callback.onFailure(e);
                    return;
                }
                callback.onSuccess(result);
            }

            @Override
            public void onFailure(Throwable caught) {
                callback.onFailure(caught);
            }
        });
    }

    // Insert a script tag into the document.
    Document document = Document.get();
    ScriptElement script = document.createScriptElement();
    String uri = makeURI(request, parameters, id);
    script.setSrc(uri);
    script.setId(id);
    Element bodyElement = document.getElementsByTagName("body").getItem(0);
    Element previous = document.getElementById(id);
    if (previous != null) {
        bodyElement.replaceChild(script, previous);
    } else {
        bodyElement.appendChild(script);
    }
}

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From source file:com.google.appinventor.client.jsonp.JsonpConnection.java

License:Open Source License

/**
 * Removes the script tag with the given id from the document.
 *//*  ww w. j  av  a  2 s  .  com*/
private static void removeScriptTag(String id) {
    Document document = Document.get();
    Element element = document.getElementById(id);
    if (element != null) {
        document.getElementsByTagName("body").getItem(0).removeChild(element);
    }
}

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From source file:com.google.speedtracer.client.SourceViewer.java

License:Apache License

private static void injectStyles(IFrameElement sourceFrame, String styleText) {
    Document iframeDocument = sourceFrame.getContentDocument();
    HeadElement head = iframeDocument.getElementsByTagName("head").getItem(0).cast();
    StyleElement styleTag = iframeDocument.createStyleElement();
    styleTag.setInnerText(styleText);//from  w  w  w .  j av  a 2 s .c  om
    head.appendChild(styleTag);
}

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From source file:com.vaadin.client.ResourceLoader.java

License:Apache License

/**
 * Creates a new resource loader. You should generally not create you own
 * resource loader, but instead use {@link ResourceLoader#get()} to get an
 * instance./*w  ww.j ava 2s  .  c  o  m*/
 */
protected ResourceLoader() {
    Document document = Document.get();
    head = document.getElementsByTagName("head").getItem(0);

    // detect already loaded scripts and stylesheets
    NodeList<Element> scripts = document.getElementsByTagName("script");
    for (int i = 0; i < scripts.getLength(); i++) {
        ScriptElement element = ScriptElement.as(scripts.getItem(i));
        String src = element.getSrc();
        if (src != null && src.length() != 0) {
            loadedResources.add(src);
        }
    }

    NodeList<Element> links = document.getElementsByTagName("link");
    for (int i = 0; i < links.getLength(); i++) {
        LinkElement linkElement = LinkElement.as(links.getItem(i));
        String rel = linkElement.getRel();
        String href = linkElement.getHref();
        if ("stylesheet".equalsIgnoreCase(rel) && href != null && href.length() != 0) {
            loadedResources.add(href);
        }
    }
}

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From source file:edu.caltech.ipac.firefly.ui.TitleFlasher.java

private static void findFavIcon() {
    Document doc = Document.get();
    NodeList<Element> eleList = doc.getElementsByTagName("link");
    for (int i = 0; (i < eleList.getLength()); i++) {
        Element e = eleList.getItem(i);
        LinkElement le = LinkElement.as(e);
        if ("image/x-icon".equals(le.getType())) {
            if (!StringUtils.isEmpty(le.getHref())) {
                favIconElement = le;/*from  w  w w. j  a  v  a2s .c o m*/
                String favIcon = le.getHref();
                break;
            }
        }
    }
}

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From source file:org.chromium.distiller.extractors.embeds.TwitterExtractor.java

License:Open Source License

/**
 * Handle a Twitter embed that has already been rendered.
 * @param e The root element of the embed (should be an "iframe").
 * @return EmbeddedElement object representing the embed or null.
 *///from w  ww  .j a va2  s .  co m
private WebEmbed handleRendered(Element e) {
    // Twitter embeds are blockquote tags operated on by some javascript.
    if (!"IFRAME".equals(e.getTagName())) {
        return null;
    }
    IFrameElement iframe = IFrameElement.as(e);

    // If the iframe has no "src" attribute, explore further.
    if (!iframe.getSrc().isEmpty()) {
        return null;
    }
    Document iframeDoc = iframe.getContentDocument();
    if (iframeDoc == null) {
        return null;
    }

    // The iframe will contain a blockquote element that has information including tweet id.
    NodeList blocks = iframeDoc.getElementsByTagName("blockquote");
    if (blocks.getLength() < 1) {
        return null;
    }
    Element tweetBlock = Element.as(blocks.getItem(0));

    String id = tweetBlock.getAttribute("data-tweet-id");

    if (id.isEmpty()) {
        return null;
    }

    return new WebEmbed(e, "twitter", id, null);
}

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From source file:org.cruxframework.crux.core.client.screen.DisplayHandler.java

License:Apache License

/**
 * Create a viewport meta element with specified content
 * @param content//  www  . java2  s. c  o  m
 * @param window
 */
public static void createViewport(String content, JavaScriptObject wnd) {
    Document document = getWindowDocument(wnd);
    MetaElement viewport = document.createMetaElement();
    viewport.setContent(content);
    viewport.setName("viewport");
    document.getElementsByTagName("head").getItem(0).appendChild(viewport);
    JavaScriptObject parentWindow = getParentWindow(wnd);
    if (parentWindow != null && isCruxWindow(parentWindow)) {
        createViewport(content, parentWindow);
    }
}

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From source file:org.cruxframework.crux.core.client.screen.ViewPortHandlerIEMobileImpl.java

License:Apache License

@Override
public void createViewport(String content, JavaScriptObject wnd) {
    if (!DeviceAdaptiveUtils.isInternetExplorerMobile()) {
        new ViewPortHandlerImpl().createViewport(content, wnd);
        return;/*from w w  w . j a  v  a2 s  .  co  m*/
    }

    Document document = getWindowDocument(wnd);
    Element header = document.getElementsByTagName("head").getItem(0);
    StyleElement viewPortStyleElement = document.createStyleElement();

    String newProperties = handlePropertiesToCSS(content);

    viewPortStyleElement.appendChild(document.createTextNode("@-ms-viewport{" + newProperties + "}"));
    header.appendChild(viewPortStyleElement);

    JavaScriptObject parentWindow = getParentWindow(wnd);
    if (parentWindow != null && isCruxWindow(parentWindow)) {
        createViewport(content, parentWindow);
    }
}

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