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/*******************************************************************************
* Copyright (c) 2018 THALES GLOBAL SERVICES.
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.diagram.ui.tools.internal.menu;
import java.net.URISyntaxException;
import java.text.MessageFormat;
import java.util.Optional;
import org.eclipse.sirius.diagram.ui.provider.Messages;
/**
* Class inspired from {@link java.net.URI} but simpler. It is used to define the location of an element.
*
* @author <a href="mailto:laurent.redor@obeo.fr">Laurent Redor</a>
*/
public class LocationURI {
/**
* The scheme to use to locate the element in the contextual menu.
*/
public static final String MENU_SCHEME = "menu"; //$NON-NLS-1$
/**
* The scheme to use to locate the element in the tabbar.
*/
public static final String TABBAR_SCHEME = "tabbar"; //$NON-NLS-1$
/**
* The separator used to define 2 locations in one LocationURI (one for menu scheme and one for tabbar scheme).
*/
public static final String LOCATION_SEPARATOR = "|"; //$NON-NLS-1$
/**
* The separator after the scheme and before the id of the menu.
*/
public static final String SEPARATOR = ":"; //$NON-NLS-1$
/**
* Id used to represent the global contextual menu.
*/
public static final String ROOT_MENU_ID = "root"; //$NON-NLS-1$
/**
* The string form of this URI.
*/
private String string;
/**
* The menuId, if any, extracted from the string.
*/
private String menuId;
/**
* The tabbarId, if any, extracted from the string.
*/
private String tabbarId;
/**
* Constructs an URI by parsing the given string.
*
* @param locationURI
* The string to be parsed into a URI
* @throws URISyntaxException
* In case of a wrong syntax of the locationURI
*/
public LocationURI(String locationURI) throws URISyntaxException {
this.string = locationURI;
parse();
}
/**
* Return the menu id of this {@link LocationURI} if this {@link LocationURI} concerns the menu.
*
* @return an optional menu id
*/
public Optional<String> getMenuId() {
return Optional.ofNullable(menuId);
}
/**
* Return the tabbar id of this {@link LocationURI} if this {@link LocationURI} concerns the tabbar.
*
* @return an optional tabbar id
*/
public Optional<String> getTabbarId() {
return Optional.ofNullable(tabbarId);
}
private void parse() throws URISyntaxException {
if (string.trim().length() == 0) {
throw new URISyntaxException(string, MessageFormat.format(Messages.LocationURI_ParsePb_Blank, MENU_SCHEME, TABBAR_SCHEME));
}
String[] locationsURI = string.split("\\" + LOCATION_SEPARATOR); //$NON-NLS-1$
if (locationsURI.length > 2) {
throw new URISyntaxException(string, MessageFormat.format(Messages.LocationURI_ParsePb_MoreThanTwoLocations, LOCATION_SEPARATOR, locationsURI.length));
}
for (int i = 0; i < locationsURI.length; i++) {
String trimmedURI = locationsURI[i].trim();
if (trimmedURI.startsWith(MENU_SCHEME)) {
parseMenuURI(trimmedURI);
} else if (trimmedURI.startsWith(TABBAR_SCHEME)) {
parseTabbarURI(trimmedURI);
} else {
throw new URISyntaxException(string, MessageFormat.format(Messages.LocationURI_ParsePb_WrongScheme, MENU_SCHEME, TABBAR_SCHEME));
}
}
}
private void parseMenuURI(String menuURI) throws URISyntaxException {
if (menuId != null) {
throw new URISyntaxException(string, MessageFormat.format(Messages.LocationURI_ParsePb_OnlyOneLocationURIPerScheme, MENU_SCHEME));
}
if (menuURI.substring(MENU_SCHEME.length()).trim().startsWith(SEPARATOR)) {
String id = menuURI.substring(MENU_SCHEME.length()).trim().substring(SEPARATOR.length()).trim();
if (id.length() == 0) {
throw new URISyntaxException(string, MessageFormat.format(Messages.LocationURI_ParsePb_NoId, MENU_SCHEME + SEPARATOR));
}
menuId = id;
} else if (menuURI.length() == MENU_SCHEME.length()) {
menuId = ROOT_MENU_ID;
} else {
throw new URISyntaxException(string, MessageFormat.format(Messages.LocationURI_ParsePb_WrongFormat, MENU_SCHEME + SEPARATOR + "menuId", menuURI)); //$NON-NLS-1$
}
}
private void parseTabbarURI(String tabbarURI) throws URISyntaxException {
if (tabbarId != null) {
throw new URISyntaxException(string, MessageFormat.format(Messages.LocationURI_ParsePb_OnlyOneLocationURIPerScheme, TABBAR_SCHEME));
}
if (tabbarURI.substring(TABBAR_SCHEME.length()).trim().startsWith(SEPARATOR)) {
String id = tabbarURI.substring(TABBAR_SCHEME.length()).trim().substring(SEPARATOR.length()).trim();
if (id.length() == 0) {
throw new URISyntaxException(string, MessageFormat.format(Messages.LocationURI_ParsePb_NoId, TABBAR_SCHEME + SEPARATOR));
}
tabbarId = id;
} else {
throw new URISyntaxException(string, MessageFormat.format(Messages.LocationURI_ParsePb_WrongFormat, TABBAR_SCHEME + SEPARATOR + "tabbarId", tabbarURI)); //$NON-NLS-1$
}
}
}
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