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A java framework to develop web applications
/*
* Copyright 2014-2016 Web Firm Framework
*
* 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.
* @author WFF
*/
package com.webfirmframework.wffweb.css.css3;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.webfirmframework.wffweb.InvalidValueException;
import com.webfirmframework.wffweb.NullValueException;
import com.webfirmframework.wffweb.clone.CloneUtil;
import com.webfirmframework.wffweb.css.CssNameConstants;
import com.webfirmframework.wffweb.css.UrlCss3Value;
import com.webfirmframework.wffweb.css.core.AbstractCssProperty;
import com.webfirmframework.wffweb.data.Bean;
import com.webfirmframework.wffweb.informer.StateChangeInformer;
import com.webfirmframework.wffweb.util.CssValueUtil;
import com.webfirmframework.wffweb.util.StringBuilderUtil;
/**
*
* icon: auto|URL|initial|inherit;
*
* The icon property provides the author the ability to style an element with an iconic equivalent.
*
* Note: An element's icon is not used unless the "content" property is set to the value "icon"!
* Default value: auto
* Inherited: no
* Animatable: no
* Version: CSS3
* JavaScript syntax: object.style.icon="url(image.png)"
*
*
* @author WFF
* @since 1.0.0
*/
public class Icon extends AbstractCssProperty
implements StateChangeInformer {
private static final long serialVersionUID = 1_0_0L;
public static final String INITIAL = "initial";
public static final String INHERIT = "inherit";
public static final String NONE = "none";
private static final List PREDEFINED_CONSTANTS = Arrays
.asList(INITIAL, INHERIT, NONE);
public static final Logger LOGGER = Logger.getLogger(Icon.class.getName());
private String cssValue;
// currently this variable is unused but it might be required for future
// update.
@SuppressWarnings("unused")
private String[] imageUrls;
private UrlCss3Value[] urlCss3Values;
/**
* the default value is none
*
* @author WFF
* @since 1.0.0
*/
public Icon() {
setCssValue(NONE);
}
/**
* @param cssValue
* the cssValue to set.
* eg:- {@code url(images/BackgroundDesign.png)}
* @author WFF
*/
public Icon(final String cssValue) {
setCssValue(cssValue);
}
/**
* @param icon
* the {@code Icon} object from which the cssName and cssValue to
* set.
* @author WFF
*/
public Icon(final Icon icon) {
if (icon == null) {
throw new NullValueException("customCss can not be null");
}
if (icon.getCssName() == null) {
throw new NullValueException(
"customCss.getCssName() can not be null");
}
setCssValue(icon.getCssValue());
}
/**
*
* sample code :- {@code new Icon("Test.gif", "TestImage.png")} creates
* background-image: url("Test.gif"), url("TestImage.png"); .
* For css3 syntax method please use
* {@code new Icon(UrlCss3Value... urlCss3Values)} or
* {@code setImageUrls(UrlCss3Value... urlCss3Values)} method.
*
* @param imageUrls
* an array of icon urls, eg:-
* {@code icon.setImageUrls("Test.gif", "TestImage.png")} and the
* generated css will be
* background-image: url("Test.gif"), url("TestImage.png");
* @since 1.0.0
* @author WFF
*/
public Icon(final String... imageUrls) {
setImageUrls(imageUrls);
}
/**
* @param urlCss3Values
* an array of {@code UrlCss3Value} objects.
* @author WFF
*/
public Icon(final UrlCss3Value... urlCss3Values) {
setImageUrls(urlCss3Values);
}
/*
* (non-Javadoc)
*
* @see com.webfirmframework.wffweb.css.CssProperty#getCssName()
*
* @since 1.0.0
*
* @author WFF
*/
@Override
public String getCssName() {
return CssNameConstants.ICON;
}
/*
* (non-Javadoc)
*
* @see com.webfirmframework.wffweb.css.CssProperty#getCssValue()
*
* @since 1.0.0
*
* @author WFF
*/
@Override
public String getCssValue() {
return cssValue;
}
@Override
public String toString() {
return getCssName() + ": " + getCssValue();
}
/**
* @param cssValue
* {@code null} is considered as an invalid value.
* @since 1.0.0
* @author WFF
*/
@Override
public Icon setCssValue(final String cssValue) {
CssValueUtil.throwExceptionForInvalidValue(cssValue);
if (PREDEFINED_CONSTANTS.contains(cssValue.trim())) {
imageUrls = null;
if (urlCss3Values != null) {
for (final UrlCss3Value urlCss3Value : urlCss3Values) {
urlCss3Value.setAlreadyInUse(false);
}
}
urlCss3Values = null;
this.cssValue = cssValue;
return this;
}
final String[] cssValueParts = cssValue.split(",");
if (cssValueParts.length > 1) {
final StringBuilder cssValueBuilder = new StringBuilder();
if (urlCss3Values == null) {
urlCss3Values = new UrlCss3Value[cssValueParts.length];
for (int i = 0; i < cssValueParts.length; i++) {
final UrlCss3Value urlCss3Value = new UrlCss3Value(
cssValueParts[i]);
urlCss3Value.setAlreadyInUse(true);
urlCss3Value.setStateChangeInformer(this);
urlCss3Values[i] = urlCss3Value;
cssValueBuilder.append(urlCss3Value.getValue());
if (i < cssValueParts.length - 1) {
cssValueBuilder.append(", ");
} else {
cssValueBuilder.append(' ');
}
}
} else {
UrlCss3Value[] urlCss3ValuesTemp = null;
if (cssValueParts.length == urlCss3Values.length) {
urlCss3ValuesTemp = urlCss3Values;
} else {
urlCss3ValuesTemp = new UrlCss3Value[cssValueParts.length];
}
for (int i = 0; i < cssValueParts.length; i++) {
final UrlCss3Value urlCss3Value;
if (i < urlCss3Values.length) {
urlCss3Value = urlCss3Values[i];
urlCss3Value.setUrlCssValue(cssValueParts[i]);
} else {
urlCss3Value = new UrlCss3Value(cssValueParts[i]);
}
urlCss3Value.setAlreadyInUse(true);
urlCss3Value.setStateChangeInformer(this);
urlCss3ValuesTemp[i] = urlCss3Value;
cssValueBuilder.append(urlCss3Value.getValue());
if (i < cssValueParts.length - 1) {
cssValueBuilder.append(", ");
} else {
cssValueBuilder.append(' ');
}
}
for (int i = cssValueParts.length; i < urlCss3Values.length; i++) {
urlCss3Values[i].setAlreadyInUse(false);
}
for (final UrlCss3Value urlCss3Value : urlCss3ValuesTemp) {
urlCss3Value.setStateChangeInformer(this);
urlCss3Value.setAlreadyInUse(true);
}
urlCss3Values = urlCss3ValuesTemp;
}
this.cssValue = StringBuilderUtil.getTrimmedString(cssValueBuilder);
} else {
this.cssValue = cssValue;
}
if (getStateChangeInformer() != null) {
getStateChangeInformer().stateChanged(this);
}
return this;
}
/**
* sample code :- {@code icon.setImageUrls("Test.gif", "TestImage.png")}
* creates
* background-image: url("Test.gif"), url("TestImage.png");.
* For css3 syntax method please use
* {@code setImageUrls(UrlCss3Value... urlCss3Values)} method.
*
* @param imageUrls
* an array of icon urls, eg:-
* {@code icon.setImageUrls("Test.gif", "TestImage.png")} and the
* generated css will be
* background-image: url("Test.gif"), url("TestImage.png");
* @since 1.0.0
* @author WFF
*/
public void setImageUrls(final String... imageUrls) {
if (imageUrls == null) {
throw new NullValueException("imageUrls is null");
}
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < imageUrls.length; i++) {
sb.append("url(\"");
sb.append(imageUrls[i]);
sb.append("\")");
if (i < imageUrls.length - 1) {
sb.append(", ");
} else {
sb.append(' ');
}
}
setCssValue(StringBuilderUtil.getTrimmedString(sb));
this.imageUrls = imageUrls;
}
/**
* @param urlCss3Values
* urlCss3Values an array of {@code UrlCss3Value} objects.
* @since 1.0.0
* @author WFF
*/
public void setImageUrls(final UrlCss3Value... urlCss3Values) {
if (urlCss3Values == null) {
throw new NullValueException("urlCss3Values is null");
}
if (this.urlCss3Values != null) {
for (final UrlCss3Value urlCss3Value : this.urlCss3Values) {
urlCss3Value.setAlreadyInUse(false);
}
}
final StringBuilder cssValueBuilder = new StringBuilder();
final int urlCss3ValuesLength = urlCss3Values.length;
for (int i = 0; i < urlCss3ValuesLength; i++) {
UrlCss3Value urlCss3Value = urlCss3Values[i];
if (urlCss3Value.isAlreadyInUse()) {
try {
final UrlCss3Value clonedUrlCss3Value = CloneUtil
. deepCloneOnlyIfDoesNotContain(
urlCss3Value, this.urlCss3Values);
if (!Objects.equals(clonedUrlCss3Value, urlCss3Value)) {
urlCss3Value = clonedUrlCss3Value;
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.warning("cloned urlCss3Value " + urlCss3Value
+ "(hashcode: " + urlCss3Value.hashCode()
+ ") as it is already used by another object");
}
}
} catch (final CloneNotSupportedException e) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.severe(e.toString());
}
}
}
cssValueBuilder.append(urlCss3Value.getValue());
if (i < urlCss3ValuesLength - 1) {
cssValueBuilder.append(", ");
} else {
cssValueBuilder.append(' ');
}
urlCss3Value.setAlreadyInUse(true);
urlCss3Value.setStateChangeInformer(this);
}
if (this.urlCss3Values != null) {
for (final UrlCss3Value urlCss3Value : this.urlCss3Values) {
urlCss3Value.setAlreadyInUse(false);
}
}
for (final UrlCss3Value urlCss3Value : urlCss3Values) {
urlCss3Value.setAlreadyInUse(true);
urlCss3Value.setStateChangeInformer(this);
}
this.urlCss3Values = urlCss3Values;
cssValue = StringBuilderUtil.getTrimmedString(cssValueBuilder);
}
/**
* @return a new object of unmodifiable {@code List} whenever
* this method is called. Or null.
*
* @author WFF
* @since 1.0.0
*/
public List getUrlCss3Values() {
// for security improvements for urlCss3Values without
// compromising performance.
// TODO the drawback of this the returning of new object each time even
// if the urlCss3Values array has not been modified, as a minor
// performance
// improvement, return a new object only if the urlCss3Values is
// modified.
if (urlCss3Values == null) {
return null;
}
return Collections.unmodifiableList(Arrays.asList(urlCss3Values));
}
/**
*
* @author WFF
* @since 1.0.0
*/
public void setAsInitial() {
setCssValue(INITIAL);
}
/**
*
* @author WFF
* @since 1.0.0
*/
public void setAsInherit() {
setCssValue(INHERIT);
}
@Override
public void stateChanged(final Bean stateChangedObject) {
if (urlCss3Values != null
&& stateChangedObject instanceof UrlCss3Value) {
final UrlCss3Value urlCss3Value = (UrlCss3Value) stateChangedObject;
if (urlCss3Value.getX() > -1 || urlCss3Value.getY() > -1) {
throw new InvalidValueException(
"urlCss3Value cannot be set with x or y values.");
}
setImageUrls(urlCss3Values);
if (getStateChangeInformer() != null) {
getStateChangeInformer().stateChanged(this);
}
}
}
}
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