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/*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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.vaadin.ui;
import java.util.Objects;
import org.jsoup.nodes.Element;
import com.vaadin.shared.ui.ValueChangeMode;
import com.vaadin.shared.ui.richtextarea.RichTextAreaClientRpc;
import com.vaadin.shared.ui.richtextarea.RichTextAreaServerRpc;
import com.vaadin.shared.ui.richtextarea.RichTextAreaState;
import com.vaadin.ui.declarative.DesignContext;
import elemental.json.Json;
/**
* A simple RichTextArea to edit HTML format text.
*/
public class RichTextArea extends AbstractField<String>
implements HasValueChangeMode {
private class RichTextAreaServerRpcImpl implements RichTextAreaServerRpc {
@Override
public void setText(String text) {
updateDiffstate("value", Json.create(text));
if (!setValue(text, true)) {
// The value was not updated, this could happen if the field has
// been set to readonly on the server and the client does not
// know about it yet. Must re-send the correct state back.
markAsDirty();
}
}
}
/**
* Constructs an empty <code>RichTextArea</code> with no caption.
*/
public RichTextArea() {
super();
registerRpc(new RichTextAreaServerRpcImpl());
setValue("");
}
/**
* Constructs an empty <code>RichTextArea</code> with the given caption.
*
* @param caption
* the caption for the editor.
*/
public RichTextArea(String caption) {
this();
setCaption(caption);
}
/**
* Constructs a new <code>RichTextArea</code> with the given caption and
* initial text contents.
*
* @param caption
* the caption for the editor.
* @param value
* the initial text content of the editor, not {@code null}
*/
public RichTextArea(String caption, String value) {
this(caption);
setValue(value);
}
/**
* Constructs a new {@code RichTextArea} with a value change listener.
* <p>
* The listener is called when the value of this {@code TextField} is
* changed either by the user or programmatically.
*
* @param valueChangeListener
* the value change listener, not {@code null}
* @since 8.0
*/
public RichTextArea(ValueChangeListener<String> valueChangeListener) {
addValueChangeListener(valueChangeListener);
}
/**
* Constructs a new {@code RichTextArea} with the given caption and a value
* change listener.
* <p>
* The listener is called when the value of this {@code TextField} is
* changed either by the user or programmatically.
*
* @param caption
* the caption for the field
* @param valueChangeListener
* the value change listener, not {@code null}
* @since 8.0
*/
public RichTextArea(String caption,
ValueChangeListener<String> valueChangeListener) {
this(valueChangeListener);
setCaption(caption);
}
/**
* Constructs a new {@code RichTextArea} with the given caption, initial
* text contents and a value change listener.
* <p>
* The listener is called when the value of this {@code RichTextArea} is
* changed either by the user or programmatically.
*
* @param caption
* the caption for the field
* @param value
* the value for the field, not {@code null}
* @param valueChangeListener
* the value change listener, not {@code null}
* @since 8.0
*/
public RichTextArea(String caption, String value,
ValueChangeListener<String> valueChangeListener) {
this(caption, value);
addValueChangeListener(valueChangeListener);
}
@Override
public void readDesign(Element design, DesignContext designContext) {
super.readDesign(design, designContext);
setValue(design.html());
}
@Override
public void writeDesign(Element design, DesignContext designContext) {
super.writeDesign(design, designContext);
design.html(getValue());
}
@Override
protected RichTextAreaState getState() {
return (RichTextAreaState) super.getState();
}
@Override
protected RichTextAreaState getState(boolean markAsDirty) {
return (RichTextAreaState) super.getState(markAsDirty);
}
/**
* Sets the value of this object. If the new value is not equal to
* {@code getValue()}, fires a {@link ValueChangeEvent}. Throws
* {@code NullPointerException} if the value is null.
*
* @param value
* the new value, not {@code null}
* @throws NullPointerException
* if {@code value} is {@code null}
*/
@Override
public void setValue(String value) {
Objects.requireNonNull(value, "value cannot be null");
setValue(value, false);
}
@Override
public String getValue() {
return getState(false).value;
}
@Override
public String getEmptyValue() {
return "";
}
@Override
protected void doSetValue(String value) {
getState().value = value;
}
/**
* Selects all text in the rich text area. As a side effect, focuses the
* rich text area.
*
* @since 6.5
*/
public void selectAll() {
getRpcProxy(RichTextAreaClientRpc.class).selectAll();
focus();
}
@Override
public void setValueChangeMode(ValueChangeMode mode) {
getState().valueChangeMode = mode;
}
@Override
public ValueChangeMode getValueChangeMode() {
return getState(false).valueChangeMode;
}
@Override
public void setValueChangeTimeout(int timeout) {
getState().valueChangeTimeout = timeout;
}
@Override
public int getValueChangeTimeout() {
return getState(false).valueChangeTimeout;
}
/**
* Clears the value of this field.
*/
@Override
public void clear() {
setValue("");
}
}
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