@Override
public void onBrowserEvent(
Context context,
Element parent,
String value,
NativeEvent event,
ValueUpdater<String> valueUpdater) {
Object key = context.getKey();
ViewData viewData = getViewData(key);
if (viewData != null && viewData.isEditing()) {
// Handle the edit event.
editEvent(context, parent, value, viewData, event, valueUpdater);
} else {
String type = event.getType();
int keyCode = event.getKeyCode();
boolean enterPressed = KEYUP.equals(type) && keyCode == KeyCodes.KEY_ENTER;
if (CLICK.equals(type) || enterPressed) {
// Go into edit mode.
if (viewData == null) {
viewData = new ViewData(value);
setViewData(key, viewData);
} else {
viewData.setEditing(true);
}
edit(context, parent, value);
}
}
}
@Override
public void render(Context context, String value, SafeHtmlBuilder sb) {
// Get the view data.
Object key = context.getKey();
ViewData viewData = getViewData(key);
if (viewData != null
&& !viewData.isEditing()
&& value != null
&& value.equals(viewData.getText())) {
clearViewData(key);
viewData = null;
}
String toRender = value;
if (viewData != null) {
String text = viewData.getText();
if (viewData.isEditing()) {
/*
* Do not use the renderer in edit mode because the value of a text
* input element is always treated as text. SafeHtml isn't valid in the
* context of the value attribute.
*/
sb.append(template.input(text));
return;
} else {
// The user pressed enter, but view data still exists.
toRender = text;
}
}
if (toRender != null && toRender.trim().length() > 0) {
sb.append(renderer.render(toRender));
} else {
/*
* Render a blank space to force the rendered element to have a height.
* Otherwise it is not clickable.
*/
sb.appendHtmlConstant("\u00A0");
}
}
@Override
public boolean isEditing(Context context, Element parent, String value) {
ViewData viewData = getViewData(context.getKey());
return viewData == null ? false : viewData.isEditing();
}