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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.render.intermediate;
-
- import java.util.Collections;
- import java.util.Locale;
- import java.util.Map;
-
- import org.apache.xmlgraphics.util.QName;
-
- import org.apache.fop.accessibility.StructureTreeElement;
- import org.apache.fop.apps.FOUserAgent;
-
- /**
- * This class provides a context object that is valid for a single processing run to create
- * an output file using the intermediate format. It allows access to the user agent and other
- * context information, such as foreign attributes for certain elements in the intermediate
- * format.
- * <p>
- * Foreign attributes are usually specific to a particular output format implementation. Most
- * implementations will just ignore all foreign attributes for most elements. That's why the
- * main IF interfaces are not burdened with this.
- */
- public class IFContext {
-
- private FOUserAgent userAgent;
-
- /** foreign attributes: Map<QName, Object> */
- private Map foreignAttributes = Collections.EMPTY_MAP;
-
- private Locale language;
-
- private StructureTreeElement structureTreeElement;
-
- private String id = "";
-
- /**
- * Main constructor.
- * @param ua the user agent
- */
- public IFContext(FOUserAgent ua) {
- setUserAgent(ua);
- }
-
- /**
- * Set the user agent.
- * @param ua the user agent
- */
- public void setUserAgent(FOUserAgent ua) {
- if (this.userAgent != null) {
- throw new IllegalStateException("The user agent was already set");
- }
- this.userAgent = ua;
- }
-
- /**
- * Returns the associated user agent.
- * @return the user agent
- */
- public FOUserAgent getUserAgent() {
- return this.userAgent;
- }
-
- /**
- * Returns the currently applicable foreign attributes.
- * @return a Map<QName, Object>
- */
- public Map getForeignAttributes() {
- return this.foreignAttributes;
- }
-
- /**
- * Returns a foreign attribute.
- * @param qName the qualified name of the foreign attribute
- * @return the value of the foreign attribute or null if the attribute isn't specified
- */
- public Object getForeignAttribute(QName qName) {
- return this.foreignAttributes.get(qName);
- }
-
- /**
- * Sets the currently applicable foreign attributes.
- * @param foreignAttributes a Map<QName, Object> or null to reset
- */
- public void setForeignAttributes(Map foreignAttributes) {
- if (foreignAttributes != null) {
- this.foreignAttributes = foreignAttributes;
- } else {
- //Make sure there is always at least an empty map so we don't have to check
- //in the implementation code
- this.foreignAttributes = Collections.EMPTY_MAP;
- }
- }
-
- /**
- * Resets the foreign attributes to "no foreign attributes".
- */
- public void resetForeignAttributes() {
- setForeignAttributes(null);
- }
-
- /**
- * Sets the currently applicable language.
- * @param lang the language
- */
- public void setLanguage(Locale lang) {
- this.language = lang;
- }
-
- /**
- * Returns the currently applicable language.
- * @return the language (or null if the language is undefined)
- */
- public Locale getLanguage() {
- return this.language;
- }
-
- /**
- * Sets the structure tree element to which the subsequently painted marks
- * will correspond. This method is used when accessibility features are
- * enabled.
- *
- * @param structureTreeElement the structure tree element
- */
- public void setStructureTreeElement(StructureTreeElement structureTreeElement) {
- this.structureTreeElement = structureTreeElement;
- }
-
- /**
- * Resets the current structure tree element.
- * @see #setStructureTreeElement(StructureTreeElement)
- */
- public void resetStructureTreeElement() {
- setStructureTreeElement(null);
- }
-
- /**
- * Returns the current structure tree element.
- * @return the structure tree element (or null if no element is active)
- * @see #setStructureTreeElement(StructureTreeElement)
- */
- public StructureTreeElement getStructureTreeElement() {
- return this.structureTreeElement;
- }
-
- /**
- * Sets the ID of the object enclosing the content that will follow.
- *
- * @param id the ID of the nearest ancestor object for which the id property was set
- */
- void setID(String id) {
- assert id != null;
- this.id = id;
- }
-
- /**
- * Returns the ID of the object enclosing the current content.
- *
- * @return the ID of the nearest ancestor object for which the id property was set
- */
- String getID() {
- return id;
- }
-
- }
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