diff options
Diffstat (limited to 'src/org/apache/fop/render')
| -rw-r--r-- | src/org/apache/fop/render/AbstractRenderer.java | 287 | ||||
| -rw-r--r-- | src/org/apache/fop/render/PrintRenderer.java | 36 | ||||
| -rw-r--r-- | src/org/apache/fop/render/Renderer.java | 189 | ||||
| -rw-r--r-- | src/org/apache/fop/render/RendererContext.java | 53 | ||||
| -rw-r--r-- | src/org/apache/fop/render/XMLHandler.java | 23 | ||||
| -rw-r--r-- | src/org/apache/fop/render/ps/ASCII85OutputStream.java | 37 | ||||
| -rw-r--r-- | src/org/apache/fop/render/ps/ASCIIHexOutputStream.java | 19 | ||||
| -rw-r--r-- | src/org/apache/fop/render/ps/Finalizable.java | 2 | ||||
| -rw-r--r-- | src/org/apache/fop/render/ps/FlateEncodeOutputStream.java | 6 | ||||
| -rw-r--r-- | src/org/apache/fop/render/ps/PSStream.java | 33 | ||||
| -rw-r--r-- | src/org/apache/fop/render/ps/RunLengthEncodeOutputStream.java | 58 |
11 files changed, 518 insertions, 225 deletions
diff --git a/src/org/apache/fop/render/AbstractRenderer.java b/src/org/apache/fop/render/AbstractRenderer.java index a4d16defe..42660c85f 100644 --- a/src/org/apache/fop/render/AbstractRenderer.java +++ b/src/org/apache/fop/render/AbstractRenderer.java @@ -1,127 +1,177 @@ /* * $Id$ - * Copyright (C) 2001 The Apache Software Foundation. All rights reserved. + * Copyright (C) 2001-2002 The Apache Software Foundation. All rights reserved. * For details on use and redistribution please refer to the * LICENSE file included with these sources. */ - package org.apache.fop.render; -// FOP -import org.apache.fop.apps.FOPException; -import org.apache.fop.area.*; -import org.apache.fop.area.inline.*; -import org.apache.fop.area.inline.Character; -import org.apache.fop.fo.FOUserAgent; - -// Avalon -import org.apache.avalon.framework.logger.AbstractLogEnabled; - // Java import java.awt.geom.Rectangle2D; import java.io.IOException; -import java.io.OutputStream; import java.util.HashMap; import java.util.List; import java.util.Iterator; +// FOP +import org.apache.fop.apps.FOPException; +import org.apache.fop.fo.FOUserAgent; +import org.apache.fop.area.Area; +import org.apache.fop.area.BeforeFloat; +import org.apache.fop.area.Block; +import org.apache.fop.area.BlockViewport; +import org.apache.fop.area.BodyRegion; +import org.apache.fop.area.CTM; +import org.apache.fop.area.Flow; +import org.apache.fop.area.Footnote; +import org.apache.fop.area.LineArea; +import org.apache.fop.area.MainReference; +import org.apache.fop.area.Span; +import org.apache.fop.area.Page; +import org.apache.fop.area.PageViewport; +import org.apache.fop.area.RegionViewport; +import org.apache.fop.area.RegionReference; +import org.apache.fop.area.Title; +import org.apache.fop.area.TreeExt; +import org.apache.fop.area.inline.Container; +import org.apache.fop.area.inline.ForeignObject; +import org.apache.fop.area.inline.Image; +import org.apache.fop.area.inline.InlineArea; +import org.apache.fop.area.inline.InlineParent; +import org.apache.fop.area.inline.Leader; +import org.apache.fop.area.inline.Space; +import org.apache.fop.area.inline.Viewport; +import org.apache.fop.area.inline.Word; +import org.apache.fop.area.inline.Character; + +// Avalon +import org.apache.avalon.framework.logger.AbstractLogEnabled; + /** - * Abstract base class for all renderers. - * The Abstract renderer does all the top level processing - * of the area tree and adds some abstract methods to handle - * viewports. This keeps track of the current block and inline - * position. + * Abstract base class for all renderers. The Abstract renderer does all the + * top level processing of the area tree and adds some abstract methods to + * handle viewports. This keeps track of the current block and inline position. */ -public abstract class AbstractRenderer extends AbstractLogEnabled implements Renderer { +public abstract class AbstractRenderer extends AbstractLogEnabled + implements Renderer { + + /** + * user agent + */ protected FOUserAgent userAgent; + + /** + * renderer configuration + */ protected HashMap options; - // block progression position + /** + * block progression position + */ protected int currentBPPosition = 0; - // inline progression position + /** + * inline progression position + */ protected int currentIPPosition = 0; + /** + * current inline progression position in block + */ protected int currentBlockIPPosition = 0; + /** @see org.apache.fop.render.Renderer */ public void setUserAgent(FOUserAgent agent) { userAgent = agent; } + /** @see org.apache.fop.render.Renderer */ public void setOptions(HashMap opt) { options = opt; } /** - * Check if this renderer supports out of order rendering. - * If this renderer supports out of order rendering then it - * means that the pages that are not ready will be prepared - * and a future page will be rendered. + * Check if this renderer supports out of order rendering. If this renderer + * supports out of order rendering then it means that the pages that are + * not ready will be prepared and a future page will be rendered. + * + * @return True if the renderer supports out of order rendering + * @see org.apache.fop.render.Renderer */ public boolean supportsOutOfOrder() { return false; } /** - * Render tree extension. + * @param ext @todo Description of the Parameter + * @see org.apache.fop.render.Renderer */ - public void renderExtension(TreeExt ext) { - } + public void renderExtension(TreeExt ext) { } /** - * Prepare a page for rendering. - * This is called if the renderer supports out of order rendering. - * The renderer should prepare the page so that a page further on - * in the set of pages can be rendered. The body of the page should - * not be rendered. The page will be rendered at a later time + * Prepare a page for rendering. This is called if the renderer supports + * out of order rendering. The renderer should prepare the page so that a + * page further on in the set of pages can be rendered. The body of the + * page should not be rendered. The page will be rendered at a later time * by the call to render page. + * + * @see org.apache.fop.render.Renderer */ - public void preparePage(PageViewport page) { - } + public void preparePage(PageViewport page) { } /** - * Utility method to convert a page sequence title to a string. - * Some renderers may only be able to use a string title. - * A title is a sequence of inline areas that this method - * attempts to convert to an equivalent string. + * Utility method to convert a page sequence title to a string. Some + * renderers may only be able to use a string title. A title is a sequence + * of inline areas that this method attempts to convert to an equivalent + * string. + * + * @param title The Title to convert + * @return An expanded string representing the title */ - public String convertTitleToString(Title title) { - String str = ""; + protected String convertTitleToString(Title title) { List children = title.getInlineAreas(); - str = convertToString(children); + String str = convertToString(children); return str.trim(); } private String convertToString(List children) { - String str = ""; + StringBuffer sb = new StringBuffer(); for (int count = 0; count < children.size(); count++) { InlineArea inline = (InlineArea) children.get(count); if (inline instanceof Character) { - str += ((Character) inline).getChar(); + sb.append(((Character) inline).getChar()); } else if (inline instanceof Word) { - str += ((Word) inline).getWord(); + sb.append(((Word) inline).getWord()); } else if (inline instanceof InlineParent) { - str += convertToString( - ((InlineParent) inline).getChildAreas()); + sb.append(convertToString( + ((InlineParent) inline).getChildAreas())); } else { - str += " "; + sb.append(" "); } } - return str; + return sb.toString(); } + /** @see org.apache.fop.render.Renderer */ public void startPageSequence(Title seqTitle) { + //do nothing } // normally this would be overriden to create a page in the // output - public void renderPage(PageViewport page) throws IOException, - FOPException { + /** @see org.apache.fop.render.Renderer */ + public void renderPage(PageViewport page) + throws IOException, FOPException { Page p = page.getPage(); renderPageAreas(p); } + /** + * Renders page areas. + * + * @param page The page whos page areas are to be rendered + */ protected void renderPageAreas(Page page) { RegionViewport viewport; viewport = page.getRegion(RegionReference.BEFORE); @@ -134,19 +184,24 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren renderRegionViewport(viewport); viewport = page.getRegion(RegionReference.AFTER); renderRegionViewport(viewport); - } - // the region may clip the area and it establishes - // a position from where the region is placed + /** + * Renders a region viewport. <p> + * + * The region may clip the area and it establishes a position from where + * the region is placed.</p> + * + * @param port The region viewport to be rendered + */ protected void renderRegionViewport(RegionViewport port) { if (port != null) { Rectangle2D view = port.getViewArea(); // The CTM will transform coordinates relative to // this region-reference area into page coords, so // set origin for the region to 0,0. - currentBPPosition = 0; // (int) (view.getY() / 1000); - currentIPPosition = 0; // (int) (view.getX() / 1000); + currentBPPosition = 0;// (int) (view.getY() / 1000); + currentIPPosition = 0;// (int) (view.getX() / 1000); currentBlockIPPosition = currentIPPosition; RegionReference region = port.getRegion(); @@ -160,10 +215,23 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren } } + /** + * @todo Description of the Method + * + * @param ctm The coordinate transformation matrix to use + */ protected void startVParea(CTM ctm) { } + /** + * @todo Description of the Method + */ protected void endVParea() { } + /** + * Renders a region reference area. + * + * @param region The region reference area + */ protected void renderRegion(RegionReference region) { List blocks = region.getBlocks(); @@ -171,6 +239,11 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren } + /** + * Renders a body region area. + * + * @param region The body region + */ protected void renderBodyRegion(BodyRegion region) { BeforeFloat bf = region.getBeforeFloat(); if (bf != null) { @@ -186,6 +259,11 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren } } + /** + * Renders a before float area. + * + * @param bf The before float area + */ protected void renderBeforeFloat(BeforeFloat bf) { List blocks = bf.getBlocks(); if (blocks != null) { @@ -197,6 +275,11 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren } } + /** + * Renders a footnote + * + * @param footnote The footnote + */ protected void renderFootnote(Footnote footnote) { List blocks = footnote.getBlocks(); if (blocks != null) { @@ -208,10 +291,17 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren } } - // the main reference area contains a list of spans that are - // stacked on the page - // the spans contain a list of normal flow reference areas - // that are positioned into columns. + /** + * Renders the main reference area. + * <p> + * The main reference area contains a list of spans that are + * stacked on the page. + * The spans contain a list of normal flow reference areas + * that are positioned into columns. + * </p> + * + * @param mr The main reference area + */ protected void renderMainReference(MainReference mr) { int saveIPPos = currentIPPosition; @@ -219,9 +309,9 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren List spans = mr.getSpans(); for (int count = 0; count < spans.size(); count++) { span = (Span) spans.get(count); - int offset = (mr.getWidth() - - (span.getColumnCount() - 1) * mr.getColumnGap()) / - span.getColumnCount() + mr.getColumnGap(); + int offset = (mr.getWidth() + - (span.getColumnCount() - 1) * mr.getColumnGap()) + / span.getColumnCount() + mr.getColumnGap(); for (int c = 0; c < span.getColumnCount(); c++) { Flow flow = (Flow) span.getFlow(c); @@ -233,13 +323,23 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren } } - // the normal flow reference area contains stacked blocks + /** + * Renders a flow reference area. + * + * @param flow The flow reference area + */ protected void renderFlow(Flow flow) { + // the normal flow reference area contains stacked blocks List blocks = flow.getBlocks(); renderBlocks(blocks); } + /** + * Renders a block area. + * + * @param block The block area + */ protected void renderBlock(Block block) { List children = block.getChildAreas(); if (children == null) { @@ -251,6 +351,12 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren } } + /** + * Renders a block viewport. + * + * @param bv The block viewport + * @param children The children to render within the block viewport + */ protected void renderBlockViewport(BlockViewport bv, List children) { // clip and position viewport if necessary if (bv.getPositioning() == Block.ABSOLUTE) { @@ -275,8 +381,14 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren } } - // a line area may have grouped styling for its children - // such as underline, background + /** + * Renders a line area. <p> + * + * A line area may have grouped styling for its children such as underline, + * background.</p> + * + * @param line The line area + */ protected void renderLineArea(LineArea line) { List children = line.getInlineAreas(); @@ -284,9 +396,9 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren InlineArea inline = (InlineArea) children.get(count); inline.render(this); } - } + /** @see org.apache.fop.render.Renderer */ public void renderViewport(Viewport viewport) { Area content = viewport.getContent(); int saveBP = currentBPPosition; @@ -303,9 +415,19 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren currentBPPosition = saveBP; } + /** + * Renders an image area. + * + * @param image The image + * @param pos The target position of the image + * @todo Make renderImage() protected + */ public void renderImage(Image image, Rectangle2D pos) { + // Default: do nothing. + // Some renderers (ex. Text) don't support images. } + /** @see org.apache.fop.render.Renderer */ public void renderContainer(Container cont) { int saveIP = currentIPPosition; currentIPPosition = currentBlockIPPosition; @@ -319,30 +441,43 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren currentBPPosition = saveBP; } + /** + * Renders a foreign object area. + * + * @param fo The foreign object area + * @param pos The target position of the foreign object + * @todo Make renderForeignObject() protected + */ public void renderForeignObject(ForeignObject fo, Rectangle2D pos) { - + // Default: do nothing. + // Some renderers (ex. Text) don't support foreign objects. } + /** @see org.apache.fop.render.Renderer */ public void renderCharacter(Character ch) { currentBlockIPPosition += ch.getWidth(); } - // an inline space moves the inline progression position - // for the current block by the width or height of the space - // it may also have styling (only on this object) that needs - // handling + /** @see org.apache.fop.render.Renderer */ public void renderInlineSpace(Space space) { + // an inline space moves the inline progression position + // for the current block by the width or height of the space + // it may also have styling (only on this object) that needs + // handling currentBlockIPPosition += space.getWidth(); } + /** @see org.apache.fop.render.Renderer */ public void renderLeader(Leader area) { currentBlockIPPosition += area.getWidth(); } + /** @see org.apache.fop.render.Renderer */ public void renderWord(Word word) { currentBlockIPPosition += word.getWidth(); } + /** @see org.apache.fop.render.Renderer */ public void renderInlineParent(InlineParent ip) { int saveIP = currentBlockIPPosition; Iterator iter = ip.getChildAreas().iterator(); @@ -352,6 +487,11 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren currentBlockIPPosition = saveIP + ip.getWidth(); } + /** + * Renders a list of block areas. + * + * @param blocks The block areas + */ protected void renderBlocks(List blocks) { for (int count = 0; count < blocks.size(); count++) { Object obj = blocks.get(count); @@ -362,10 +502,11 @@ public abstract class AbstractRenderer extends AbstractLogEnabled implements Ren // of the line, each inline object is offset from there LineArea line = (LineArea) obj; currentBlockIPPosition = - currentIPPosition + line.getStartIndent(); + currentIPPosition + line.getStartIndent(); renderLineArea(line); currentBPPosition += line.getHeight(); } } } + } diff --git a/src/org/apache/fop/render/PrintRenderer.java b/src/org/apache/fop/render/PrintRenderer.java index 153ccc89b..4420361cb 100644 --- a/src/org/apache/fop/render/PrintRenderer.java +++ b/src/org/apache/fop/render/PrintRenderer.java @@ -1,55 +1,41 @@ /* * $Id$ - * Copyright (C) 2001 The Apache Software Foundation. All rights reserved. + * Copyright (C) 2001-2002 The Apache Software Foundation. All rights reserved. * For details on use and redistribution please refer to the * LICENSE file included with these sources." */ - package org.apache.fop.render; // FOP -import org.apache.fop.pdf.PDFPathPaint; -import org.apache.fop.pdf.PDFColor; -import org.apache.fop.apps.FOPException; -import org.apache.fop.fo.properties.*; -import org.apache.fop.datatypes.*; import org.apache.fop.render.pdf.FontSetup; import org.apache.fop.layout.FontInfo; // Java import java.io.IOException; import java.io.OutputStream; -import java.util.Enumeration; -/** - * Abstract base class of "Print" type renderers. - * - */ +/** Abstract base class of "Print" type renderers. */ public abstract class PrintRenderer extends AbstractRenderer { + + /** Font configuration */ protected FontInfo fontInfo; /** - * set up the font info - * - * @param fontInfo font info to set up + * Set up the font info + * + * @param fontInfo font info to set up */ public void setupFontInfo(FontInfo fontInfo) { this.fontInfo = fontInfo; FontSetup.setup(fontInfo, null); } - /** - * - */ + /** @see org.apache.fop.render.Renderer */ public void startRenderer(OutputStream outputStream) - throws IOException {} + throws IOException { } - /** - * - */ + /** @see org.apache.fop.render.Renderer */ public void stopRenderer() - throws IOException - { - } + throws IOException { } } diff --git a/src/org/apache/fop/render/Renderer.java b/src/org/apache/fop/render/Renderer.java index 0bddcea97..9a489c7d7 100644 --- a/src/org/apache/fop/render/Renderer.java +++ b/src/org/apache/fop/render/Renderer.java @@ -1,84 +1,197 @@ /* * $Id$ - * Copyright (C) 2001 The Apache Software Foundation. All rights reserved. + * Copyright (C) 2001-2002 The Apache Software Foundation. All rights reserved. * For details on use and redistribution please refer to the * LICENSE file included with these sources. */ package org.apache.fop.render; -// FOP -import org.apache.fop.apps.FOPException; -import org.apache.fop.area.*; -import org.apache.fop.area.inline.*; -import org.apache.fop.layout.FontInfo; -import org.apache.fop.fo.FOUserAgent; - // Java import java.io.OutputStream; import java.io.IOException; import java.util.HashMap; +// FOP +import org.apache.fop.apps.FOPException; +import org.apache.fop.area.PageViewport; +import org.apache.fop.area.Title; +import org.apache.fop.area.TreeExt; +import org.apache.fop.area.inline.Container; +import org.apache.fop.area.inline.InlineParent; +import org.apache.fop.area.inline.Leader; +import org.apache.fop.area.inline.Space; +import org.apache.fop.area.inline.Viewport; +import org.apache.fop.area.inline.Word; +import org.apache.fop.layout.FontInfo; +import org.apache.fop.fo.FOUserAgent; + /** - * Interface implemented by all renderers. - * This interface is used to control the rendering of pages - * and to let block and inline level areas call the appropriate - * method to render themselves + * Interface implemented by all renderers. This interface is used to control + * the rendering of pages and to let block and inline level areas call the + * appropriate method to render themselves. <p> + * + * A Renderer implementation takes areas/spaces and produces output in some + * format.</p> <p> * - * a Renderer implementation takes areas/spaces and produces output in - * some format. + * Typically, most renderers are subclassed from FOP's abstract implementations + * ({@link AbstractRenderer}, {@link PrintRenderer}) which already handle a lot + * of things letting you concentrate on the details of the output format. */ public interface Renderer { - public static final String ROLE = Renderer.class.getName(); + /** + * Role constant for Avalon. + */ + String ROLE = Renderer.class.getName(); + + /** + * Initiates the rendering phase. + * + * @param outputStream The OutputStream to use for output + * @exception IOException If an I/O error occurs + */ + void startRenderer(OutputStream outputStream) + throws IOException; - public void startRenderer(OutputStream outputStream) throws IOException; + /** + * Signals the end of the rendering phase. + * + * @exception IOException If an I/O error occurs + */ + void stopRenderer() + throws IOException; - public void stopRenderer() throws IOException; + /** + * Set the User Agent. + * + * @param agent The User Agent + */ + void setUserAgent(FOUserAgent agent); /** - * Set the User Agent + * Set up the given FontInfo. + * + * @param fontInfo The fonts */ - public void setUserAgent(FOUserAgent agent); + void setupFontInfo(FontInfo fontInfo); /** - * set up the given FontInfo + * Set up renderer options. + * + * @param options The Configuration for the renderer */ - public void setupFontInfo(FontInfo fontInfo); + void setOptions(HashMap options); /** - * set up renderer options + * Set the producer of the rendering. If this method isn't called the + * renderer uses a default. Note: Not all renderers support this feature. + * + * @param producer The name of the producer (normally "FOP") to be + * embedded in the generated file. */ - public void setOptions(HashMap options); + void setProducer(String producer); /** - * set the producer of the rendering + * Reports if out of order rendering is supported. <p> + * + * Normally, all pages of a document are rendered in their natural order + * (page 1, page 2, page 3 etc.). Some output formats (such as PDF) allow + * pages to be output in random order. This is helpful to reduce resource + * strain on the system because a page that cannot be fully resolved + * doesn't block subsequent pages that are already fully resolved. </p> + * + * @return True if this renderer supports out of order rendering. */ - public void setProducer(String producer); + boolean supportsOutOfOrder(); - public boolean supportsOutOfOrder(); + /** + * Tells the renderer to render an extension element. + * + * @param ext The extension element to be rendered + */ + void renderExtension(TreeExt ext); - public void renderExtension(TreeExt ext); + /** + * This is called if the renderer supports out of order rendering. The + * renderer should prepare the page so that a page further on in the set of + * pages can be rendered. The body of the page should not be rendered. The + * page will be rendered at a later time by the call to {@link + * #renderPage(PageViewport)}. + * + * @param page The page viewport to use + */ + void preparePage(PageViewport page); - public void preparePage(PageViewport page); + /** + * Tells the renderer that a new page sequence starts. + * + * @param seqTitle The title of the page sequence + */ + void startPageSequence(Title seqTitle); - public void startPageSequence(Title seqTitle); + /** + * Tells the renderer to render a particular page. A renderer typically + * reponds by packing up the current page and writing it immediately to the + * output device. + * + * @param page The page to be rendered + * @exception IOException if an I/O error occurs + * @exception FOPException if a FOP interal error occurs. + */ + void renderPage(PageViewport page) + throws IOException, FOPException; - public void renderPage(PageViewport page) throws IOException, FOPException; + /** + * Tells the renderer to render an inline viewport. It sets up clipping as + * necessary. + * + * @param viewport The viewport area + */ + void renderViewport(Viewport viewport); - public void renderViewport(Viewport viewport); + /** + * Tells the renderer to render an inline container. + * + * @param cont The inline container area + */ + void renderContainer(Container cont); - public void renderContainer(Container cont); + /** + * Tells the renderer to render an inline word. + * + * @param area The word area + */ + void renderWord(Word area); - public void renderWord(Word area); + /** + * Tells the renderer to render an inline parent area. + * + * @param ip The inline parent area + */ + void renderInlineParent(InlineParent ip); - public void renderInlineParent(InlineParent ip); + /** + * Tells the renderer to render an inline character. + * + * @param ch The inline character + */ + void renderCharacter( + org.apache.fop.area.inline.Character ch); - public void renderCharacter( - org.apache.fop.area.inline.Character ch); + /** + * Tells the renderer to render an inline space. + * + * @param space The inline space + */ + void renderInlineSpace(Space space); - public void renderInlineSpace(Space space); + /** + * Tells the renderer to render an inline leader area. + * + * @param area The inline leader area. + */ + void renderLeader(Leader area); - public void renderLeader(Leader area); } diff --git a/src/org/apache/fop/render/RendererContext.java b/src/org/apache/fop/render/RendererContext.java index 911c9baab..52c242dd9 100644 --- a/src/org/apache/fop/render/RendererContext.java +++ b/src/org/apache/fop/render/RendererContext.java @@ -1,45 +1,80 @@ /* * $Id$ - * Copyright (C) 2001 The Apache Software Foundation. All rights reserved. + * Copyright (C) 2001-2002 The Apache Software Foundation. All rights reserved. * For details on use and redistribution please refer to the * LICENSE file included with these sources. */ package org.apache.fop.render; -import org.apache.fop.fo.FOUserAgent; +//Java +import java.util.Map; -import java.util.HashMap; +//FOP +import org.apache.fop.fo.FOUserAgent; /** - * The Render Context for external handlers. - * This provides a rendering context so that external handlers - * can get information to be able to render to the render target. + * The Render Context for external handlers. This provides a rendering context + * so that external handlers can get information to be able to render to the + * render target. */ public class RendererContext { - String mime; - FOUserAgent userAgent; - HashMap props = new HashMap(); + private String mime; + private FOUserAgent userAgent; + private Map props = new java.util.HashMap(); + + /** + * Contructor for this class. It takes a MIME type as parameter. + * + * @param m The MIME type of the output that's generated. + */ public RendererContext(String m) { mime = m; } + /** + * Returns the MIME type associated with this RendererContext. + * + * @return The MIME type (ex. application/pdf) + */ public String getMimeType() { return mime; } + /** + * Sets the user agent. + * + * @param ua The user agent + */ public void setUserAgent(FOUserAgent ua) { userAgent = ua; } + /** + * Returns the user agent. + * + * @return The user agent + */ public FOUserAgent getUserAgent() { return userAgent; } + /** + * Sets a property on the RendererContext. + * + * @param name The key of the property + * @param val The value of the property + */ public void setProperty(String name, Object val) { props.put(name, val); } + /** + * Returns a property from the RendererContext. + * + * @param prop The key of the property to return. + * @return The requested value, <code>null</code> if it doesn't exist. + */ public Object getProperty(String prop) { return props.get(prop); } diff --git a/src/org/apache/fop/render/XMLHandler.java b/src/org/apache/fop/render/XMLHandler.java index 1bdf05729..e5437c015 100644 --- a/src/org/apache/fop/render/XMLHandler.java +++ b/src/org/apache/fop/render/XMLHandler.java @@ -1,24 +1,33 @@ /* * $Id$ - * Copyright (C) 2001 The Apache Software Foundation. All rights reserved. + * Copyright (C) 2001-2002 The Apache Software Foundation. All rights reserved. * For details on use and redistribution please refer to the * LICENSE file included with these sources. */ - package org.apache.fop.render; import org.w3c.dom.Document; /** + * This interface is implemented by classes that can handle a certain type + * of foreign objects. */ public interface XMLHandler { /** - * Handle an external xml document inside a Foreign Object Area - * This may throw an exception if for some reason it cannot be handled. - * The caller is expected to deal with this exception. + * Handle an external xml document inside a Foreign Object Area. <p> + * + * This may throw an exception if for some reason it cannot be handled. The + * caller is expected to deal with this exception.</p> + * + * @param context The RendererContext (contains the user agent) + * @param doc A DOM containing the foreign object to be + * processed + * @param ns The Namespace of the foreign object + * @exception Exception If an error occurs during processing. */ - public void handleXML(RendererContext context, Document doc, - String ns) throws Exception; + void handleXML(RendererContext context, Document doc, String ns) + throws Exception; + } diff --git a/src/org/apache/fop/render/ps/ASCII85OutputStream.java b/src/org/apache/fop/render/ps/ASCII85OutputStream.java index 80adf8dab..1b4473539 100644 --- a/src/org/apache/fop/render/ps/ASCII85OutputStream.java +++ b/src/org/apache/fop/render/ps/ASCII85OutputStream.java @@ -25,10 +25,10 @@ public class ASCII85OutputStream extends FilterOutputStream private static final int EOL = 0x0A; //"\n" private static final byte[] EOD = {0x7E, 0x3E}; //"~>" - private static final long base85_4 = 85; - private static final long base85_3 = base85_4 * base85_4; - private static final long base85_2 = base85_3 * base85_4; - private static final long base85_1 = base85_2 * base85_4; + private static final long BASE85_4 = 85; + private static final long BASE85_3 = BASE85_4 * BASE85_4; + private static final long BASE85_2 = BASE85_3 * BASE85_4; + private static final long BASE85_1 = BASE85_2 * BASE85_4; private static final boolean DEBUG = false; @@ -38,11 +38,13 @@ public class ASCII85OutputStream extends FilterOutputStream private int bw = 0; + /** @see java.io.FilterOutputStream **/ public ASCII85OutputStream(OutputStream out) { super(out); } + /** @see java.io.FilterOutputStream **/ public void write(int b) throws IOException { if (pos == 0) { buffer += (b << 24) & 0xff000000L; @@ -82,10 +84,14 @@ public class ASCII85OutputStream extends FilterOutputStream private void checkedWrite(byte[] buf , int len) throws IOException { if (posinline + len > 80) { int firstpart = len - (posinline + len - 80); - if (firstpart > 0) out.write(buf, 0, firstpart); + if (firstpart > 0) { + out.write(buf, 0, firstpart); + } out.write(EOL); bw++; int rest = len - firstpart; - if (rest > 0) out.write(buf, firstpart, rest); + if (rest > 0) { + out.write(buf, firstpart, rest); + } posinline = rest; } else { out.write(buf, 0, len); @@ -113,17 +119,18 @@ public class ASCII85OutputStream extends FilterOutputStream if (word < 0) { word = -word; } - byte c1 = (byte)((word / base85_1) & 0xFF); - byte c2 = (byte)(((word - (c1 * base85_1)) / base85_2) & 0xFF); + byte c1 = (byte)((word / BASE85_1) & 0xFF); + byte c2 = (byte)(((word - (c1 * BASE85_1)) / BASE85_2) & 0xFF); byte c3 = - (byte)(((word - (c1 * base85_1) - (c2 * base85_2)) / base85_3) - & 0xFF); + (byte)(((word - (c1 * BASE85_1) - (c2 * BASE85_2)) + / BASE85_3) & 0xFF); byte c4 = - (byte)(((word - (c1 * base85_1) - (c2 * base85_2) - (c3 * base85_3)) / base85_4) - & 0xFF); + (byte)(((word - (c1 * BASE85_1) - (c2 * BASE85_2) - (c3 * BASE85_3)) + / BASE85_4) & 0xFF); byte c5 = - (byte)(((word - (c1 * base85_1) - (c2 * base85_2) - (c3 * base85_3) - (c4 * base85_4))) - & 0xFF); + (byte)(((word - (c1 * BASE85_1) - (c2 * BASE85_2) - (c3 * BASE85_3) + - (c4 * BASE85_4))) + & 0xFF); byte[] ret = { (byte)(c1 + START), (byte)(c2 + START), @@ -144,6 +151,7 @@ public class ASCII85OutputStream extends FilterOutputStream } + /** @see org.apache.fop.render.ps.Finalizable **/ public void finalizeStream() throws IOException { // now take care of the trailing few bytes. // with n leftover bytes, we append 0 bytes to make a full group of 4 @@ -191,6 +199,7 @@ public class ASCII85OutputStream extends FilterOutputStream } + /** @see java.io.FilterOutputStream **/ public void close() throws IOException { finalizeStream(); super.close(); diff --git a/src/org/apache/fop/render/ps/ASCIIHexOutputStream.java b/src/org/apache/fop/render/ps/ASCIIHexOutputStream.java index af37a73b4..34b2c5192 100644 --- a/src/org/apache/fop/render/ps/ASCIIHexOutputStream.java +++ b/src/org/apache/fop/render/ps/ASCIIHexOutputStream.java @@ -16,32 +16,39 @@ import java.io.IOException; * @author <a href="mailto:jeremias.maerki@outline.ch">Jeremias Maerki</a> * @version $Id$ */ -public class ASCIIHexOutputStream extends FilterOutputStream { +public class ASCIIHexOutputStream extends FilterOutputStream + implements Finalizable { private static final int EOL = 0x0A; //"\n" private static final int EOD = 0x3E; //">" private static final int ZERO = 0x30; //"0" private static final int NINE = 0x39; //"9" private static final int A = 0x41; //"A" - private static final int ADIFF = A - NINE -1; + private static final int ADIFF = A - NINE - 1; private int posinline = 0; + /** @see java.io.FilterOutputStream **/ public ASCIIHexOutputStream(OutputStream out) { super(out); } + /** @see java.io.FilterOutputStream **/ public void write(int b) throws IOException { b &= 0xFF; int digit1 = ((b & 0xF0) >> 4) + ZERO; - if (digit1 > NINE) digit1 += ADIFF; + if (digit1 > NINE) { + digit1 += ADIFF; + } out.write(digit1); int digit2 = (b & 0x0F) + ZERO; - if (digit2 > NINE) digit2 += ADIFF; + if (digit2 > NINE) { + digit2 += ADIFF; + } out.write(digit2); posinline++; @@ -58,6 +65,7 @@ public class ASCIIHexOutputStream extends FilterOutputStream { } + /** @see org.apache.fop.render.ps.Finalizable **/ public void finalizeStream() throws IOException { checkLineWrap(); //Write closing character ">" @@ -65,11 +73,12 @@ public class ASCIIHexOutputStream extends FilterOutputStream { flush(); if (out instanceof Finalizable) { - ((Finalizable)out).finalizeStream(); + ((Finalizable) out).finalizeStream(); } } + /** @see java.io.FilterOutputStream **/ public void close() throws IOException { finalizeStream(); super.close(); diff --git a/src/org/apache/fop/render/ps/Finalizable.java b/src/org/apache/fop/render/ps/Finalizable.java index d7c77d668..83b80b810 100644 --- a/src/org/apache/fop/render/ps/Finalizable.java +++ b/src/org/apache/fop/render/ps/Finalizable.java @@ -24,7 +24,7 @@ public interface Finalizable { * * @exception java.io.IOException In case of an IO problem */ - public void finalizeStream() + void finalizeStream() throws java.io.IOException; } diff --git a/src/org/apache/fop/render/ps/FlateEncodeOutputStream.java b/src/org/apache/fop/render/ps/FlateEncodeOutputStream.java index e6d96b8e9..ca65a778a 100644 --- a/src/org/apache/fop/render/ps/FlateEncodeOutputStream.java +++ b/src/org/apache/fop/render/ps/FlateEncodeOutputStream.java @@ -7,12 +7,12 @@ package org.apache.fop.render.ps; import java.io.OutputStream; -import java.io.FilterOutputStream; import java.io.IOException; /** * This class applies a FlateEncode filter to the stream. It is basically the - * normal DeflaterOutputStream except now conformi + * normal DeflaterOutputStream except now also implementing the Finalizable + * interface. * * @author <a href="mailto:jeremias.maerki@outline.ch">Jeremias Maerki</a> * @version $Id$ @@ -21,11 +21,13 @@ public class FlateEncodeOutputStream extends java.util.zip.DeflaterOutputStream implements Finalizable { + /** @see java.util.zip.DeflaterOutputStream **/ public FlateEncodeOutputStream(OutputStream out) { super(out); } + /** @see org.apache.fop.render.ps.Finalizable **/ public void finalizeStream() throws IOException { finish(); flush(); diff --git a/src/org/apache/fop/render/ps/PSStream.java b/src/org/apache/fop/render/ps/PSStream.java index 2643a6c5a..2e1c624ab 100644 --- a/src/org/apache/fop/render/ps/PSStream.java +++ b/src/org/apache/fop/render/ps/PSStream.java @@ -1,29 +1,50 @@ /* * $Id$ - * Copyright (C) 2001 The Apache Software Foundation. All rights reserved. + * Copyright (C) 2001-2002 The Apache Software Foundation. All rights reserved. * For details on use and redistribution please refer to the * LICENSE file included with these sources. */ - package org.apache.fop.render.ps; -import java.io.*; +import java.io.OutputStream; +import java.io.FilterOutputStream; +import java.io.IOException; +/** + * PSStream is used to to output PostScript code from the PostScript renderer. + */ public class PSStream extends FilterOutputStream { + /** @see java.io.FilterOutputStream **/ public PSStream(OutputStream out) { super(out); } - + + + /** + * Writes a PostScript command to the stream. + * + * @param cmd The PostScript code to be written. + * @exception IOException In case of an I/O problem + */ public void write(String cmd) throws IOException { - if (cmd.length() > 255) + if (cmd.length() > 255) { throw new RuntimeException("PostScript command exceeded limit of 255 characters"); + } write(cmd.getBytes("US-ASCII")); write('\n'); } - + + + /** + * Writes encoded data to the PostScript stream. + * + * @param cmd The encoded PostScript code to be written. + * @exception IOException In case of an I/O problem + */ public void writeByteArr(byte[] cmd) throws IOException { write(cmd); write('\n'); } + } diff --git a/src/org/apache/fop/render/ps/RunLengthEncodeOutputStream.java b/src/org/apache/fop/render/ps/RunLengthEncodeOutputStream.java index a006bc5b6..64778a3f2 100644 --- a/src/org/apache/fop/render/ps/RunLengthEncodeOutputStream.java +++ b/src/org/apache/fop/render/ps/RunLengthEncodeOutputStream.java @@ -16,41 +16,30 @@ import java.io.IOException; * @author <a href="mailto:smwolke@geistig.com">Stephen Wolke</a> * @version $Id$ */ - public class RunLengthEncodeOutputStream extends FilterOutputStream implements Finalizable { - private final static int MAX_SEQUENCE_COUNT = 127; - private final static int END_OF_DATA = 128; - private final static int BYTE_MAX = 256; + private static final int MAX_SEQUENCE_COUNT = 127; + private static final int END_OF_DATA = 128; + private static final int BYTE_MAX = 256; - private final static int NOT_IDENTIFY_SEQUENCE = 0; - private final static int START_SEQUENCE = 1; - private final static int IN_SEQUENCE = 2; - private final static int NOT_IN_SEQUENCE = 3; + private static final int NOT_IDENTIFY_SEQUENCE = 0; + private static final int START_SEQUENCE = 1; + private static final int IN_SEQUENCE = 2; + private static final int NOT_IN_SEQUENCE = 3; private int runCount = 0; private int isSequence = NOT_IDENTIFY_SEQUENCE; private byte[] runBuffer = new byte[MAX_SEQUENCE_COUNT + 1]; - /** - * Constructor for the RunLengthEncode Filter. - * - * @param out The OutputStream to write to - */ + /** @see java.io.FilterOutputStream **/ public RunLengthEncodeOutputStream(OutputStream out) { super(out); } - /** - * @see java.io.OutputStream#write(int) - * @param b the <code>byte</code>. - * @exception IOException if an I/O error occurs. In particular, - * an <code>IOException</code> may be thrown if the - * output stream has been closed. - */ + /** @see java.io.FilterOutputStream **/ public void write(byte b) throws java.io.IOException { runBuffer[runCount] = b; @@ -131,11 +120,7 @@ public class RunLengthEncodeOutputStream extends FilterOutputStream } - /** - * @see java.io.OutputStream#write(byte[]) - * @param b the data. - * @exception IOException if an I/O error occurs. - */ + /** @see java.io.FilterOutputStream **/ public void write(byte[] b) throws IOException { @@ -145,15 +130,7 @@ public class RunLengthEncodeOutputStream extends FilterOutputStream } - /** - * @see java.io.OutputStream#write(byte[], int, int) - * @param b the data. - * @param off the start offset in the data. - * @param len the number of bytes to write. - * @exception IOException if an I/O error occurs. In particular, - * an <code>IOException</code> is thrown if the output - * stream is closed. - */ + /** @see java.io.FilterOutputStream **/ public void write(byte[] b, int off, int len) throws IOException { @@ -163,12 +140,7 @@ public class RunLengthEncodeOutputStream extends FilterOutputStream } - /** - * Flushes the the stream and writes out the trailer, but, unlike close(), - * without closing the stream. - * - * @exception IOException if an I/O error occurs. - */ + /** @see org.apache.fop.render.ps.Finalizable **/ public void finalizeStream() throws IOException { switch (isSequence) { @@ -190,11 +162,7 @@ public class RunLengthEncodeOutputStream extends FilterOutputStream } - /** - * Closes the stream. - * - * @exception IOException if an I/O error occurs. - */ + /** @see java.io.FilterOutputStream **/ public void close() throws IOException { finalizeStream(); |