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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.apps;
-
- // Java
- import java.io.File;
- import java.util.Date;
- import java.util.Map;
-
- import javax.xml.transform.Source;
- import javax.xml.transform.TransformerException;
- import javax.xml.transform.URIResolver;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.xmlgraphics.image.loader.ImageContext;
- import org.apache.xmlgraphics.image.loader.ImageSessionContext;
- import org.apache.xmlgraphics.image.loader.impl.AbstractImageSessionContext;
-
- import org.apache.fop.Version;
- import org.apache.fop.events.DefaultEventBroadcaster;
- import org.apache.fop.events.Event;
- import org.apache.fop.events.EventBroadcaster;
- import org.apache.fop.events.EventListener;
- import org.apache.fop.events.FOPEventListenerProxy;
- import org.apache.fop.events.LoggingEventListener;
- import org.apache.fop.fo.FOEventHandler;
- import org.apache.fop.render.Renderer;
- import org.apache.fop.render.RendererFactory;
- import org.apache.fop.render.XMLHandlerRegistry;
-
- /**
- * This is the user agent for FOP.
- * It is the entity through which you can interact with the XSL-FO processing and is
- * used by the processing to obtain user configurable options.
- * <p>
- * Renderer specific extensions (that do not produce normal areas on
- * the output) will be done like so:
- * <br>
- * The extension will create an area, custom if necessary
- * <br>
- * this area will be added to the user agent with a key
- * <br>
- * the renderer will know keys for particular extensions
- * <br>
- * eg. bookmarks will be held in a special hierarchical area representing
- * the title and bookmark structure
- * <br>
- * These areas may contain resolvable areas that will be processed
- * with other resolvable areas
- */
- public class FOUserAgent {
-
- /** Defines the default target resolution (72dpi) for FOP */
- public static final float DEFAULT_TARGET_RESOLUTION
- = FopFactoryConfigurator.DEFAULT_TARGET_RESOLUTION;
-
- private static Log log = LogFactory.getLog("FOP");
-
- private FopFactory factory;
-
- /**
- * The base URL for all URL resolutions, especially for
- * external-graphics.
- */
- private String base = null;
-
- /** The base URL for all font URL resolutions. */
- private String fontBase = null;
-
- /** A user settable URI Resolver */
- private URIResolver uriResolver = null;
-
- private float targetResolution = FopFactoryConfigurator.DEFAULT_TARGET_RESOLUTION;
- private Map rendererOptions = new java.util.HashMap();
- private File outputFile = null;
- private Renderer rendererOverride = null;
- private FOEventHandler foEventHandlerOverride = null;
- private boolean locatorEnabled = true; // true by default (for error messages).
- private EventBroadcaster eventBroadcaster = new FOPEventBroadcaster();
-
- /** Producer: Metadata element for the system/software that produces
- * the document. (Some renderers can store this in the document.)
- */
- protected String producer = "Apache FOP Version " + Version.getVersion();
-
- /** Creator: Metadata element for the user that created the
- * document. (Some renderers can store this in the document.)
- */
- protected String creator = null;
-
- /** Creation Date: Override of the date the document was created.
- * (Some renderers can store this in the document.)
- */
- protected Date creationDate = null;
-
- /** Author of the content of the document. */
- protected String author = null;
- /** Title of the document. */
- protected String title = null;
- /** Set of keywords applicable to this document. */
- protected String keywords = null;
-
- private ImageSessionContext imageSessionContext = new AbstractImageSessionContext() {
-
- public ImageContext getParentContext() {
- return getFactory();
- }
-
- public float getTargetResolution() {
- return FOUserAgent.this.getTargetResolution();
- }
-
- public Source resolveURI(String uri) {
- return FOUserAgent.this.resolveURI(uri);
- }
-
- };
-
- /**
- * Main constructor. <b>This constructor should not be called directly. Please use the
- * methods from FopFactory to construct FOUserAgent instances!</b>
- * @param factory the factory that provides environment-level information
- * @see org.apache.fop.apps.FopFactory
- */
- public FOUserAgent(FopFactory factory) {
- if (factory == null) {
- throw new NullPointerException("The factory parameter must not be null");
- }
- this.factory = factory;
- setBaseURL(factory.getBaseURL());
- setFontBaseURL(factory.getFontManager().getFontBaseURL());
- setTargetResolution(factory.getTargetResolution());
- }
-
- /** @return the associated FopFactory instance */
- public FopFactory getFactory() {
- return this.factory;
- }
-
- // ---------------------------------------------- rendering-run dependent stuff
-
- /**
- * Sets an explicit renderer to use which overrides the one defined by the
- * render type setting.
- * @param renderer the Renderer instance to use
- */
- public void setRendererOverride(Renderer renderer) {
- this.rendererOverride = renderer;
- }
-
- /**
- * Returns the overriding Renderer instance, if any.
- * @return the overriding Renderer or null
- */
- public Renderer getRendererOverride() {
- return rendererOverride;
- }
-
- /**
- * Sets an explicit FOEventHandler instance which overrides the one
- * defined by the render type setting.
- * @param handler the FOEventHandler instance
- */
- public void setFOEventHandlerOverride(FOEventHandler handler) {
- this.foEventHandlerOverride = handler;
- }
-
- /**
- * Returns the overriding FOEventHandler instance, if any.
- * @return the overriding FOEventHandler or null
- */
- public FOEventHandler getFOEventHandlerOverride() {
- return this.foEventHandlerOverride;
- }
-
- /**
- * Sets the producer of the document.
- * @param producer source of document
- */
- public void setProducer(String producer) {
- this.producer = producer;
- }
-
- /**
- * Returns the producer of the document
- * @return producer name
- */
- public String getProducer() {
- return producer;
- }
-
- /**
- * Sets the creator of the document.
- * @param creator of document
- */
- public void setCreator(String creator) {
- this.creator = creator;
- }
-
- /**
- * Returns the creator of the document
- * @return creator name
- */
- public String getCreator() {
- return creator;
- }
-
- /**
- * Sets the creation date of the document.
- * @param creationDate date of document
- */
- public void setCreationDate(Date creationDate) {
- this.creationDate = creationDate;
- }
-
- /**
- * Returns the creation date of the document
- * @return creation date of document
- */
- public Date getCreationDate() {
- return creationDate;
- }
-
- /**
- * Sets the author of the document.
- * @param author of document
- */
- public void setAuthor(String author) {
- this.author = author;
- }
-
- /**
- * Returns the author of the document
- * @return author name
- */
- public String getAuthor() {
- return author;
- }
-
- /**
- * Sets the title of the document. This will override any title coming from
- * an fo:title element.
- * @param title of document
- */
- public void setTitle(String title) {
- this.title = title;
- }
-
- /**
- * Returns the title of the document
- * @return title name
- */
- public String getTitle() {
- return title;
- }
-
- /**
- * Sets the keywords for the document.
- * @param keywords for the document
- */
- public void setKeywords(String keywords) {
- this.keywords = keywords;
- }
-
- /**
- * Returns the keywords for the document
- * @return the keywords
- */
- public String getKeywords() {
- return keywords;
- }
-
- /**
- * Returns the renderer options
- * @return renderer options
- */
- public Map getRendererOptions() {
- return rendererOptions;
- }
-
- /**
- * Sets the base URL.
- * @param baseUrl base URL
- */
- public void setBaseURL(String baseUrl) {
- this.base = baseUrl;
- }
-
- /**
- * sets font base URL
- * @param fontBaseUrl font base URL
- */
- public void setFontBaseURL(String fontBaseUrl) {
- this.fontBase = fontBaseUrl;
- }
-
- /**
- * Returns the base URL.
- * @return the base URL
- */
- public String getBaseURL() {
- return this.base;
- }
-
- /**
- * Sets the URI Resolver.
- * @param resolver the new URI resolver
- */
- public void setURIResolver(URIResolver resolver) {
- this.uriResolver = resolver;
- }
-
- /**
- * Returns the URI Resolver.
- * @return the URI Resolver
- */
- public URIResolver getURIResolver() {
- return this.uriResolver;
- }
-
- /**
- * Attempts to resolve the given URI.
- * Will use the configured resolver and if not successful fall back
- * to the default resolver.
- * @param uri URI to access
- * @return A {@link javax.xml.transform.Source} object, or null if the URI
- * cannot be resolved.
- * @see org.apache.fop.apps.FOURIResolver
- */
- public Source resolveURI(String uri) {
- return resolveURI(uri, getBaseURL());
- }
-
- /**
- * Attempts to resolve the given URI.
- * Will use the configured resolver and if not successful fall back
- * to the default resolver.
- * @param href URI to access
- * @param base the base URI to resolve against
- * @return A {@link javax.xml.transform.Source} object, or null if the URI
- * cannot be resolved.
- * @see org.apache.fop.apps.FOURIResolver
- */
- public Source resolveURI(String href, String base) {
- Source source = null;
- //RFC 2397 data URLs don't need to be resolved, just decode them through FOP's default
- //URIResolver.
- boolean bypassURIResolution = href.startsWith("data:");
- if (!bypassURIResolution && uriResolver != null) {
- try {
- source = uriResolver.resolve(href, base);
- } catch (TransformerException te) {
- log.error("Attempt to resolve URI '" + href + "' failed: ", te);
- }
- }
- if (source == null) {
- // URI Resolver not configured or returned null, use default resolver from the factory
- source = getFactory().resolveURI(href, base);
- }
- return source;
- }
-
- /**
- * Sets the output File.
- * @param f the output File
- */
- public void setOutputFile(File f) {
- this.outputFile = f;
- }
-
- /**
- * Gets the output File.
- * @return the output File
- */
- public File getOutputFile() {
- return outputFile;
- }
-
- /**
- * Returns the conversion factor from pixel units to millimeters. This
- * depends on the desired target resolution.
- * @return float conversion factor
- * @see #getTargetResolution()
- */
- public float getTargetPixelUnitToMillimeter() {
- return 25.4f / this.targetResolution;
- }
-
- /** @return the resolution for resolution-dependant output */
- public float getTargetResolution() {
- return this.targetResolution;
- }
-
- /**
- * Sets the target resolution in dpi. This value defines the target resolution of
- * bitmap images generated by the bitmap renderers (such as the TIFF renderer) and of
- * bitmap images generated by filter effects in Apache Batik.
- * @param dpi resolution in dpi
- */
- public void setTargetResolution(float dpi) {
- this.targetResolution = dpi;
- if (log.isDebugEnabled()) {
- log.debug("target-resolution set to: " + targetResolution
- + "dpi (px2mm=" + getTargetPixelUnitToMillimeter() + ")");
- }
- }
-
- /**
- * Sets the target resolution in dpi. This value defines the target resolution of
- * bitmap images generated by the bitmap renderers (such as the TIFF renderer) and of
- * bitmap images generated by filter effects in Apache Batik.
- * @param dpi resolution in dpi
- */
- public void setTargetResolution(int dpi) {
- setTargetResolution((float)dpi);
- }
-
- /**
- * Returns the image session context for the image package.
- * @return the ImageSessionContext instance for this rendering run
- */
- public ImageSessionContext getImageSessionContext() {
- return this.imageSessionContext;
- }
-
- // ---------------------------------------------- environment-level stuff
- // (convenience access to FopFactory methods)
-
- /** @return the font base URL */
- public String getFontBaseURL() {
- return fontBase != null ? fontBase : getBaseURL();
- }
-
- /**
- * Returns the conversion factor from pixel units to millimeters. This
- * depends on the desired source resolution.
- * @return float conversion factor
- * @see #getSourceResolution()
- */
- public float getSourcePixelUnitToMillimeter() {
- return getFactory().getSourcePixelUnitToMillimeter();
- }
-
- /** @return the resolution for resolution-dependant input */
- public float getSourceResolution() {
- return getFactory().getSourceResolution();
- }
-
- /**
- * Gets the default page-height to use as fallback,
- * in case page-height="auto"
- *
- * @return the page-height, as a String
- * @see FopFactory#getPageHeight()
- */
- public String getPageHeight() {
- return getFactory().getPageHeight();
- }
-
- /**
- * Gets the default page-width to use as fallback,
- * in case page-width="auto"
- *
- * @return the page-width, as a String
- * @see FopFactory#getPageWidth()
- */
- public String getPageWidth() {
- return getFactory().getPageWidth();
- }
-
- /**
- * Returns whether FOP is strictly validating input XSL
- * @return true of strict validation turned on, false otherwise
- * @see FopFactory#validateStrictly()
- */
- public boolean validateStrictly() {
- return getFactory().validateStrictly();
- }
-
- /**
- * @return true if the indent inheritance should be broken when crossing reference area
- * boundaries (for more info, see the javadoc for the relative member variable)
- * @see FopFactory#isBreakIndentInheritanceOnReferenceAreaBoundary()
- */
- public boolean isBreakIndentInheritanceOnReferenceAreaBoundary() {
- return getFactory().isBreakIndentInheritanceOnReferenceAreaBoundary();
- }
-
- /**
- * @return the RendererFactory
- */
- public RendererFactory getRendererFactory() {
- return getFactory().getRendererFactory();
- }
-
- /**
- * @return the XML handler registry
- */
- public XMLHandlerRegistry getXMLHandlerRegistry() {
- return getFactory().getXMLHandlerRegistry();
- }
-
- /**
- * Controls the use of SAXLocators to provide location information in error
- * messages.
- *
- * @param enableLocator <code>false</code> if SAX Locators should be disabled
- */
- public void setLocatorEnabled(boolean enableLocator) {
- locatorEnabled = enableLocator;
- }
-
- /**
- * Checks if the use of Locators is enabled
- * @return true if context information should be stored on each node in the FO tree.
- */
- public boolean isLocatorEnabled() {
- return locatorEnabled;
- }
-
- /**
- * Returns the event broadcaster that control events sent inside a processing run. Clients
- * can register event listeners with the event broadcaster to listen for events that occur
- * while a document is being processed.
- * @return the event broadcaster.
- */
- public EventBroadcaster getEventBroadcaster() {
- return this.eventBroadcaster;
- }
-
- private class FOPEventBroadcaster extends DefaultEventBroadcaster {
-
- private EventListener rootListener;
-
- public FOPEventBroadcaster() {
- //Install a temporary event listener that catches the first event to
- //do some initialization.
- this.rootListener = new EventListener() {
- public void processEvent(Event event) {
- if (!listeners.hasEventListeners()) {
- //Backwards-compatibility: Make sure at least the LoggingEventListener is
- //plugged in so no events are just silently swallowed.
- addEventListener(
- new LoggingEventListener(LogFactory.getLog(FOUserAgent.class)));
- }
- //Replace with final event listener
- rootListener = new FOPEventListenerProxy(
- listeners, FOUserAgent.this);
- rootListener.processEvent(event);
- }
- };
- }
-
- /** {@inheritDoc} */
- public void broadcastEvent(Event event) {
- rootListener.processEvent(event);
- }
-
- }
-
- }
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