com.google.gwt.user.client.ui.InlineHTML Maven / Gradle / Ivy
/*
* Copyright 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.user.client.ui;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.i18n.shared.DirectionEstimator;
import com.google.gwt.safehtml.shared.SafeHtml;
/**
* A widget that can contain arbitrary HTML.
*
* This widget uses a <span> element, causing it to be displayed with
* inline layout.
*
*
* If you only need a simple label (text, but not HTML), then the
* {@link com.google.gwt.user.client.ui.Label} widget is more appropriate, as it
* disallows the use of HTML, which can lead to potential security issues if not
* used properly.
*
*
*
*
Built-in Bidi Text Support
* This widget is capable of automatically adjusting its direction according to
* its content. This feature is controlled by {@link #setDirectionEstimator} or
* passing a DirectionEstimator parameter to the constructor, and is off by
* default.
*
*
* CSS Style Rules
*
* - .gwt-InlineHTML { }
*
*/
public class InlineHTML extends HTML {
/**
* Creates an InlineHTML widget that wraps an existing <div> or
* <span> element.
*
* This element must already be attached to the document. If the element is
* removed from the document, you must call
* {@link RootPanel#detachNow(Widget)}.
*
* @param element the element to be wrapped
*/
public static InlineHTML wrap(Element element) {
// Assert that the element is attached.
assert Document.get().getBody().isOrHasChild(element);
InlineHTML html = new InlineHTML(element);
// Mark it attached and remember it for cleanup.
html.onAttach();
RootPanel.detachOnWindowClose(html);
return html;
}
/**
* Creates an empty HTML widget.
*/
public InlineHTML() {
super(Document.get().createSpanElement());
setStyleName("gwt-InlineHTML");
}
/**
* Initializes the widget's HTML from a given {@link SafeHtml} object.
*
* @param html the new widget's HTML contents
*/
public InlineHTML(SafeHtml html) {
this(html.asString());
}
/**
* Creates an HTML widget with the specified contents and with the
* specified direction.
*
* @param html the new widget's SafeHtml contents
* @param dir the content's direction. Note: {@code Direction.DEFAULT} means
* direction should be inherited from the widget's parent element.
*/
public InlineHTML(SafeHtml html, Direction dir) {
this(html.asString(), dir);
}
/**
* Creates an HTML widget with the specified HTML contents and with a default
* direction estimator.
*
* @param html the new widget's SafeHtml contents
* @param directionEstimator A DirectionEstimator object used for automatic
* direction adjustment. For convenience,
* {@link Label#DEFAULT_DIRECTION_ESTIMATOR} can be used.
*/
public InlineHTML(SafeHtml html, DirectionEstimator directionEstimator) {
this();
setDirectionEstimator(directionEstimator);
setHTML(html);
}
/**
* Creates an HTML widget with the specified HTML contents.
*
* @param html the new widget's HTML contents
*/
public InlineHTML(String html) {
this();
setHTML(html);
}
/**
* Creates an HTML widget with the specified HTML contents and with the
* specified direction.
*
* @param html the new widget's HTML contents
* @param dir the content's direction. Note: {@code Direction.DEFAULT} means
* direction should be inherited from the widget's parent element.
*/
public InlineHTML(String html, Direction dir) {
this();
setHTML(html, dir);
}
/**
* This constructor may be used by subclasses to explicitly use an existing
* element. This element must be either a <div> <span> element.
*
* @param element the element to be used
*/
protected InlineHTML(Element element) {
// super(element) also asserts that element is either a <div> or
// <span>.
super(element);
}
}