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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;
import java.util.Arrays;
import java.util.List;
import java.util.logging.Logger;
import com.webfirmframework.wffweb.InvalidValueException;
import com.webfirmframework.wffweb.NullValueException;
import com.webfirmframework.wffweb.css.core.AbstractCssProperty;
import com.webfirmframework.wffweb.css.core.CssProperty;
import com.webfirmframework.wffweb.informer.StateChangeInformer;
import com.webfirmframework.wffweb.util.StringBuilderUtil;
/**
* list-style: list-style-type list-style-position
* list-style-image|initial|inherit;
*
*
* Formal syntax: <'list-style-type'> || <'list-style-position'> ||
* <'list-style-image'>
*
* @author WFF
* @since 1.0.0
*/
public class ListStyle extends AbstractCssProperty
implements StateChangeInformer {
private static final long serialVersionUID = 1_0_0L;
public static final Logger LOGGER = Logger
.getLogger(ListStyle.class.getName());
public static final String INITIAL = "initial";
public static final String INHERIT = "inherit";
private static final List PREDEFINED_CONSTANTS = Arrays
.asList(INITIAL, INHERIT);
private String cssValue;
private ListStyleType listStyleType;
private ListStylePosition listStylePosition;
private ListStyleImage listStyleImage;
/**
* The value disc outside none will be assigned as the
* cssValue.
*
* @author WFF
* @since 1.0.0
*/
public ListStyle() {
setCssValue("disc outside none");
}
/**
* @param cssValue
* the css value to set.
*/
public ListStyle(final String cssValue) {
setCssValue(cssValue);
}
/**
* @param listStyle
* the {@code ListStyle} object from which the cssValue to
* set.And, {@code null} will throw {@code NullValueException}
*/
public ListStyle(final ListStyle listStyle) {
if (listStyle == null) {
throw new NullValueException("listStyle can not be null");
}
setCssValue(listStyle.getCssValue());
}
/*
* (non-Javadoc)
*
* @see com.webfirmframework.wffweb.css.CssProperty#getCssName()
*
* @since 1.0.0
*
* @author WFF
*/
@Override
public String getCssName() {
return CssNameConstants.LIST_STYLE_TYPE;
}
/*
* (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
* the value should be in the format of 55px or
* 95%. {@code null} is considered as an invalid
* value and it will throw {@code NullValueException}.
* @since 1.0.0
* @author WFF
*/
@Override
public ListStyle setCssValue(final String cssValue) {
// NB: cssValue can contain upper case so it should not be converted to
// lower case.
final String trimmedCssValue;
if (cssValue == null) {
throw new NullValueException(
"null is an invalid value. The value format should be as for example cjk-ideographic inside url(\"Sqpurple.gif\"). Or, initial/inherit.");
} else if ((trimmedCssValue = cssValue.trim()).isEmpty()) {
throw new NullValueException(cssValue
+ " is an invalid value. The value format should be as for example cjk-ideographic inside url(\"Sqpurple.gif\"). Or, initial/inherit.");
}
final String[] cssValueParts = trimmedCssValue.split(" ");
if (cssValueParts.length > 1) {
if (trimmedCssValue.contains(ListStyleImage.INITIAL)) {
throw new InvalidValueException(
"The string 'initial' makes the given cssValue invalid, please remove 'initial' from it and try.");
}
if (trimmedCssValue.contains(ListStyleImage.INHERIT)) {
throw new InvalidValueException(
"The string 'inherit' makes the given cssValue invalid, please remove 'inherit' from it and try.");
}
} else {
if (PREDEFINED_CONSTANTS.contains(trimmedCssValue)) {
listStyleType = null;
listStylePosition = null;
if (listStyleImage != null) {
listStyleImage.setAlreadyInUse(false);
listStyleImage = null;
}
this.cssValue = trimmedCssValue;
if (getStateChangeInformer() != null) {
getStateChangeInformer().stateChanged(this);
}
return this;
}
}
ListStyleType listStyleType = null;
ListStylePosition listStylePosition = null;
ListStyleImage listStyleImage = null;
for (final String eachPart : cssValueParts) {
if (listStyleType == null && ListStyleType.isValid(eachPart)) {
listStyleType = ListStyleType.getThis(eachPart);
} else if (listStylePosition == null
&& ListStylePosition.isValid(eachPart)) {
listStylePosition = ListStylePosition.getThis(eachPart);
} else if (listStyleImage == null
&& ListStyleImage.isValid(eachPart)) {
if (this.listStyleImage == null) {
listStyleImage = new ListStyleImage(eachPart);
listStyleImage.setStateChangeInformer(this);
listStyleImage.setAlreadyInUse(true);
} else {
this.listStyleImage.setCssValue(eachPart);
listStyleImage = this.listStyleImage;
}
} else {
throw new InvalidValueException(cssValue
+ " is an invalid value. The value format should be as for example cjk-ideographic inside url(\"Sqpurple.gif\"). Or, initial/inherit.");
}
}
final StringBuilder cssValueBuilder = new StringBuilder();
boolean invalid = true;
if (listStyleType != null) {
cssValueBuilder.append(listStyleType.getCssValue());
cssValueBuilder.append(" ");
invalid = false;
}
if (listStylePosition != null) {
cssValueBuilder.append(listStylePosition.getCssValue());
cssValueBuilder.append(" ");
invalid = false;
}
if (listStyleImage != null) {
cssValueBuilder.append(listStyleImage.getCssValue());
cssValueBuilder.append(" ");
invalid = false;
}
if (invalid) {
throw new InvalidValueException(cssValue
+ " is an invalid value. The value format should be as for example cjk-ideographic inside url(\"Sqpurple.gif\"). Or, initial/inherit.");
}
this.cssValue = StringBuilderUtil.getTrimmedString(cssValueBuilder);
this.listStyleType = listStyleType;
this.listStylePosition = listStylePosition;
this.listStyleImage = listStyleImage;
if (getStateChangeInformer() != null) {
getStateChangeInformer().stateChanged(this);
}
return this;
}
/**
* checks the given css value is valid for this class. It does't do a strict
* validation.
*
* @param cssValue
* @return
* @since 1.0.0
* @author WFF
*/
public static boolean isValid(final String cssValue) {
// TODO modify to make a strict validation
if (cssValue == null || cssValue.trim().isEmpty()) {
return false;
}
final String[] cssValueParts = cssValue.split(" ");
ListStyleType listStyleType = null;
ListStylePosition listStylePosition = null;
ListStyleImage listStyleImage = null;
for (final String eachPart : cssValueParts) {
boolean invalid = true;
if (listStyleType == null && ListStyleType.isValid(eachPart)) {
listStyleType = ListStyleType.getThis(eachPart);
invalid = false;
} else if (listStylePosition == null
&& ListStylePosition.isValid(eachPart)) {
listStylePosition = ListStylePosition.getThis(eachPart);
invalid = false;
} else if (listStyleImage == null
&& ListStyleImage.isValid(eachPart)) {
listStyleImage = new ListStyleImage(eachPart);
invalid = false;
}
if (invalid) {
return false;
}
}
return listStyleType != null || listStylePosition != null
|| listStyleImage != null;
}
/**
* sets as initial
*
* @since 1.0.0
* @author WFF
*/
public void setAsInitial() {
setCssValue(INITIAL);
}
/**
* sets as inherit
*
* @since 1.0.0
* @author WFF
*/
public void setAsInherit() {
setCssValue(INHERIT);
}
public ListStyleImage getListStyleImage() {
return listStyleImage;
}
public ListStylePosition getListStylePosition() {
return listStylePosition;
}
public ListStyleType getListStyleType() {
return listStyleType;
}
public ListStyle setListStyleType(final ListStyleType listStyleType) {
final StringBuilder cssValueBuilder = new StringBuilder();
if (listStyleType != null) {
cssValueBuilder.append(listStyleType.getCssValue());
cssValueBuilder.append(" ");
}
if (listStylePosition != null) {
cssValueBuilder.append(listStylePosition.getCssValue());
cssValueBuilder.append(" ");
}
if (listStyleImage != null) {
cssValueBuilder.append(listStyleImage.getCssValue());
cssValueBuilder.append(" ");
}
final String trimmedCssValue = StringBuilderUtil
.getTrimmedString(cssValueBuilder);
cssValue = trimmedCssValue.isEmpty() ? INHERIT : trimmedCssValue;
this.listStyleType = listStyleType;
if (getStateChangeInformer() != null) {
getStateChangeInformer().stateChanged(this);
}
return this;
}
public ListStyle setListStylePosition(
final ListStylePosition listStylePosition) {
final StringBuilder cssValueBuilder = new StringBuilder();
if (listStyleType != null) {
cssValueBuilder.append(listStyleType.getCssValue());
cssValueBuilder.append(" ");
}
if (listStylePosition != null) {
cssValueBuilder.append(listStylePosition.getCssValue());
cssValueBuilder.append(" ");
}
if (listStyleImage != null) {
cssValueBuilder.append(listStyleImage.getCssValue());
cssValueBuilder.append(" ");
}
final String trimmedCssValue = StringBuilderUtil
.getTrimmedString(cssValueBuilder);
cssValue = trimmedCssValue.isEmpty() ? INHERIT : trimmedCssValue;
this.listStylePosition = listStylePosition;
if (getStateChangeInformer() != null) {
getStateChangeInformer().stateChanged(this);
}
return this;
}
public ListStyle setListStyleImage(final ListStyleImage listStyleImage) {
final StringBuilder cssValueBuilder = new StringBuilder();
if (listStyleType != null) {
cssValueBuilder.append(listStyleType.getCssValue());
cssValueBuilder.append(" ");
}
if (listStylePosition != null) {
cssValueBuilder.append(listStylePosition.getCssValue());
cssValueBuilder.append(" ");
}
if (listStyleImage != null) {
final String listStyleImageCssValue = listStyleImage.getCssValue();
if (ListStyleImage.INITIAL.equals(listStyleImageCssValue)
|| ListStyleImage.INHERIT.equals(listStyleImageCssValue)) {
throw new InvalidValueException(
"listStyleImage cannot have initial/inherit as its cssValue");
}
cssValueBuilder.append(listStyleImageCssValue);
}
final String trimmedCssValue = StringBuilderUtil
.getTrimmedString(cssValueBuilder);
cssValue = trimmedCssValue.isEmpty() ? INHERIT : trimmedCssValue;
if (listStyleImage != null && listStyleImage.isAlreadyInUse()
&& this.listStyleImage != listStyleImage) {
LOGGER.warning(
"the given listStyleImage is already used by another object so a new object or the previous object (if it exists) of ListStyleImage will be used");
return setCssValue(cssValue);
}
if (this.listStyleImage != null) {
this.listStyleImage.setAlreadyInUse(false);
}
this.listStyleImage = listStyleImage;
if (this.listStyleImage != null) {
this.listStyleImage.setStateChangeInformer(this);
this.listStyleImage.setAlreadyInUse(true);
}
if (getStateChangeInformer() != null) {
getStateChangeInformer().stateChanged(this);
}
return this;
}
@Override
public void stateChanged(final CssProperty stateChangedObject) {
if (stateChangedObject instanceof ListStyleImage) {
final ListStyleImage listStyleImage = (ListStyleImage) stateChangedObject;
final String cssValue = listStyleImage.getCssValue();
if (ListStyleImage.INITIAL.equals(cssValue)
|| ListStyleImage.INHERIT.equals(cssValue)) {
throw new InvalidValueException(
"initial/inherit cannot be set as listStyleImage cssValue");
}
setListStyleImage(listStyleImage);
}
}
/**
*
* @author WFF
* @since 1.0.0
*/
protected void addPredefinedConstant(final String constant) {
PREDEFINED_CONSTANTS.add(constant);
}
}