and the example without a line of JSNI :)
but be aware of same-domain restriction when retrieving reference
iframe's content.
public class IframeStyleExample implements EntryPoint {
public static StyleElement addStyleSheet(FrameElement frameElement,
String cssText) {
Document contentDocument = frameElement.getContentDocument();
Element targetElement =
contentDocument.getElementsByTagName("head")
.getItem(0);
if(targetElement == null){
targetElement = contentDocument.getDocumentElement()
.getFirstChildElement();
if(targetElement == null){
contentDocument.insertFirst(targetElement =
contentDocument
.createElement("head"));
}
}
StyleElement styleElement =
contentDocument.createStyleElement();
styleElement.setType("text/css");
styleElement.setCssText(cssText);
targetElement.insertFirst(styleElement);
return styleElement;
}
@Override
public void onModuleLoad() {
final Frame frame = new Frame();
frame.addLoadHandler(new LoadHandler() {
@Override
public void onLoad(LoadEvent event) {
FrameElement frameElement =
frame.getElement().cast();
addStyleSheet(frameElement,
"div {background: #ff0000;}");
}
});
}
}
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