/*
* Copyright 2000-2009 JetBrains s.r.o.
*
* 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.intellij.uiDesigner.lw;
import com.intellij.uiDesigner.UIFormXmlConstants;
import org.jdom.Attribute;
import org.jdom.Element;
import java.awt.*;
import java.lang.reflect.Method;
public final class LwXmlReader {
private LwXmlReader() {
}
/**
* @return can be <code>null</code>.
*/
public static Element getChild(final Element element, final String childName) {
return element.getChild(childName, element.getNamespace());
}
/**
* @return never <code>null</code>.
*/
public static Element getRequiredChild(final Element element, final String childName) {
final Element child = getChild(element, childName);
if(child == null){
throw new IllegalArgumentException("subtag '" + childName + "' is required: "+element);
}
return child;
}
/**
* @return <code>null</code> or trimmed attribute value.
*/
public static String getString(final Element element, final String attributeName){
final String value = element.getAttributeValue(attributeName);
return value != null ? value.trim() : null;
}
/**
* @return never <code>null</code> trimmed attribute value.
*/
public static String getRequiredString(final Element element, final String attributeName) {
final String value = getString(element, attributeName);
if(value != null){
return value;
}
else{
throw new IllegalArgumentException("attribute '" + attributeName + "' is required: "+element);
}
}
public static String getOptionalString(final Element element, final String attributeName, final String defaultValue) {
final String value = element.getAttributeValue(attributeName);
return value != null ? value.trim() : defaultValue;
}
public static int getRequiredInt(final Element element, final String attributeName) {
final String str = getRequiredString(element, attributeName);
try {
return Integer.parseInt(str);
}
catch (NumberFormatException e) {
throw new IllegalArgumentException("attribute '" + attributeName + "' is not a proper integer: " + str);
}
}
public static int getOptionalInt(final Element element, final String attributeName, final int defaultValue) {
final String str = element.getAttributeValue(attributeName);
if (str == null) {
return defaultValue;
}
try {
return Integer.parseInt(str);
}
catch (NumberFormatException e) {
throw new IllegalArgumentException("attribute '" + attributeName + "' is not a proper integer: " + str);
}
}
public static boolean getOptionalBoolean(final Element element, final String attributeName, final boolean defaultValue) {
final String str = element.getAttributeValue(attributeName);
if (str == null) {
return defaultValue;
}
return Boolean.valueOf(str).booleanValue();
}
public static double getRequiredDouble(final Element element, final String attributeName) {
final String str = getRequiredString(element, attributeName);
try {
return Double.parseDouble(str);
}
catch (NumberFormatException e) {
throw new IllegalArgumentException("attribute '" + attributeName + "' is not a proper double: " + str);
}
}
public static double getOptionalDouble(final Element element, final String attributeName, double defaultValue) {
final String str = element.getAttributeValue(attributeName);
if (str == null) {
return defaultValue;
}
try {
return Double.parseDouble(str);
}
catch (NumberFormatException e) {
throw new IllegalArgumentException("attribute '" + attributeName + "' is not a proper double: " + str);
}
}
public static float getRequiredFloat(final Element element, final String attributeName) {
final String str = getRequiredString(element, attributeName);
try {
return Float.parseFloat(str);
}
catch (NumberFormatException e) {
throw new IllegalArgumentException("attribute '" + attributeName + "' is not a proper float: " + str);
}
}
public static Object getRequiredPrimitiveTypeValue(final Element element, final String attributeName, final Class valueClass) {
final String str = getRequiredString(element, attributeName);
try {
final Method method = valueClass.getMethod("valueOf", new Class[]{String.class});
//noinspection unchecked
return method.invoke(null, new Object[]{str});
}
catch (NumberFormatException e) {
throw new IllegalArgumentException("attribute '" + attributeName + "' is not a proper float: " + str);
}
catch (Exception e) {
throw new RuntimeException(e);
}
}
public static StringDescriptor getStringDescriptor(final Element element, final String valueAttr,
final String bundleAttr, final String keyAttr) {
final String title = element.getAttributeValue(valueAttr);
if (title != null) {
StringDescriptor descriptor = StringDescriptor.create(title);
descriptor.setNoI18n(getOptionalBoolean(element, UIFormXmlConstants.ATTRIBUTE_NOI18N, false));
return descriptor;
}
else {
final String bundle = element.getAttributeValue(bundleAttr);
if (bundle != null) {
final String key = getRequiredString(element, keyAttr);
return new StringDescriptor(bundle, key);
}
}
return null;
}
public static FontDescriptor getFontDescriptor(final Element element) {
String swingFont = element.getAttributeValue(UIFormXmlConstants.ATTRIBUTE_SWING_FONT);
if (swingFont != null) {
return FontDescriptor.fromSwingFont(swingFont);
}
String fontName = element.getAttributeValue(UIFormXmlConstants.ATTRIBUTE_NAME);
int fontStyle = getOptionalInt(element, UIFormXmlConstants.ATTRIBUTE_STYLE, -1);
int fontSize = getOptionalInt(element, UIFormXmlConstants.ATTRIBUTE_SIZE, -1);
return new FontDescriptor(fontName, fontStyle, fontSize);
}
public static ColorDescriptor getColorDescriptor(final Element element) throws Exception {
Attribute attr = element.getAttribute(UIFormXmlConstants.ATTRIBUTE_COLOR);
if (attr != null) {
return new ColorDescriptor(new Color(attr.getIntValue()));
}
String swingColor = element.getAttributeValue(UIFormXmlConstants.ATTRIBUTE_SWING_COLOR);
if (swingColor != null) {
return ColorDescriptor.fromSwingColor(swingColor);
}
String systemColor = element.getAttributeValue(UIFormXmlConstants.ATTRIBUTE_SYSTEM_COLOR);
if (systemColor != null) {
return ColorDescriptor.fromSystemColor(systemColor);
}
String awtColor = element.getAttributeValue(UIFormXmlConstants.ATTRIBUTE_AWT_COLOR);
if (awtColor != null) {
return ColorDescriptor.fromAWTColor(awtColor);
}
return new ColorDescriptor(null);
}
public static ColorDescriptor getOptionalColorDescriptor(final Element element) {
if (element == null) return null;
try {
return getColorDescriptor(element);
}
catch(Exception ex) {
return null;
}
}
public static Insets readInsets(final Element element) {
final int top = getRequiredInt(element, UIFormXmlConstants.ATTRIBUTE_TOP);
final int left = getRequiredInt(element, UIFormXmlConstants.ATTRIBUTE_LEFT);
final int bottom = getRequiredInt(element, UIFormXmlConstants.ATTRIBUTE_BOTTOM);
final int right = getRequiredInt(element, UIFormXmlConstants.ATTRIBUTE_RIGHT);
return new Insets(top, left, bottom, right);
}
}