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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;
-
- // Java
- import java.awt.Rectangle;
- import java.awt.geom.AffineTransform;
- import java.awt.geom.Rectangle2D;
- import java.io.IOException;
- import java.io.OutputStream;
- import java.util.List;
- import java.util.Locale;
- import java.util.Set;
- import java.util.Stack;
-
- import org.w3c.dom.Document;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.fop.ResourceEventProducer;
- import org.apache.fop.apps.FOPException;
- import org.apache.fop.apps.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.Footnote;
- import org.apache.fop.area.LineArea;
- import org.apache.fop.area.MainReference;
- import org.apache.fop.area.NormalFlow;
- import org.apache.fop.area.OffDocumentItem;
- import org.apache.fop.area.Page;
- import org.apache.fop.area.PageSequence;
- import org.apache.fop.area.PageViewport;
- import org.apache.fop.area.RegionReference;
- import org.apache.fop.area.RegionViewport;
- import org.apache.fop.area.Span;
- import org.apache.fop.area.Trait;
- import org.apache.fop.area.inline.Container;
- import org.apache.fop.area.inline.FilledArea;
- 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.InlineBlockParent;
- import org.apache.fop.area.inline.InlineParent;
- import org.apache.fop.area.inline.InlineViewport;
- import org.apache.fop.area.inline.Leader;
- import org.apache.fop.area.inline.Space;
- import org.apache.fop.area.inline.SpaceArea;
- import org.apache.fop.area.inline.TextArea;
- import org.apache.fop.area.inline.WordArea;
- import org.apache.fop.fo.Constants;
- import org.apache.fop.fonts.FontInfo;
- import org.apache.fop.traits.Visibility;
-
- /**
- * 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
- implements Renderer, Constants {
-
- /** logging instance */
- protected static final Log log = LogFactory.getLog("org.apache.fop.render");
-
- /**
- * user agent
- */
- protected FOUserAgent userAgent;
-
- /**
- * block progression position
- */
- protected int currentBPPosition;
-
- /**
- * inline progression position
- */
- protected int currentIPPosition;
-
- /**
- * the block progression position of the containing block used for
- * absolutely positioned blocks
- */
- protected int containingBPPosition;
-
- /**
- * the inline progression position of the containing block used for
- * absolutely positioned blocks
- */
- protected int containingIPPosition;
-
- /** the currently active PageViewport */
- protected PageViewport currentPageViewport;
-
- /* warned XML handlers */
- private Set warnedXMLHandlers;
-
- /* layers stack */
- private Stack<String> layers;
-
- /** {@inheritDoc} */
- public abstract void setupFontInfo(FontInfo fontInfo) throws FOPException;
-
- /**
- *
- * @param userAgent the user agent that contains configuration details. This cannot be null.
- */
- public AbstractRenderer(FOUserAgent userAgent) {
- this.userAgent = userAgent;
- }
-
- /** {@inheritDoc} */
- public FOUserAgent getUserAgent() {
- return userAgent;
- }
-
- /** {@inheritDoc} */
- public void startRenderer(OutputStream outputStream)
- throws IOException {
- if (userAgent == null) {
- throw new IllegalStateException("FOUserAgent has not been set on Renderer");
- }
- }
-
- /** {@inheritDoc} */
- public void stopRenderer()
- throws IOException { }
-
- /**
- * 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
- */
- public boolean supportsOutOfOrder() {
- return false;
- }
-
- /** {@inheritDoc} */
- public void setDocumentLocale(Locale locale) {
- }
-
- /**
- * {@inheritDoc}
- */
- public void processOffDocumentItem(OffDocumentItem odi) { }
-
- /** {@inheritDoc} */
- public Graphics2DAdapter getGraphics2DAdapter() {
- return null;
- }
-
- /** {@inheritDoc} */
- public ImageAdapter getImageAdapter() {
- return null;
- }
-
- /** @return the current PageViewport or null, if none is active */
- protected PageViewport getCurrentPageViewport() {
- return this.currentPageViewport;
- }
-
- /** {@inheritDoc} */
- 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.
- *
- * @param title The Title to convert
- * @return An expanded string representing the title
- */
- protected String convertTitleToString(LineArea title) {
- List children = title.getInlineAreas();
- String str = convertToString(children);
- return str.trim();
- }
-
- private String convertToString(List children) {
- StringBuffer sb = new StringBuffer();
- for (Object aChildren : children) {
- InlineArea inline = (InlineArea) aChildren;
- //if (inline instanceof Character) {
- // sb.append(((Character) inline).getChar());
- /*} else*/
- if (inline instanceof TextArea) {
- sb.append(((TextArea) inline).getText());
- } else if (inline instanceof InlineParent) {
- sb.append(convertToString(
- ((InlineParent) inline).getChildAreas()));
- } else {
- sb.append(" ");
- }
- }
- return sb.toString();
- }
-
- /**
- * {@inheritDoc}
- * @deprecated
- */
- public void startPageSequence(LineArea seqTitle) {
- //do nothing
- }
-
- /** {@inheritDoc} */
- public void startPageSequence(PageSequence pageSequence) {
- // do nothing
- }
-
- // normally this would be overriden to create a page in the
- // output
- /** {@inheritDoc} */
- public void renderPage(PageViewport page)
- throws IOException, FOPException {
-
- this.currentPageViewport = page;
- try {
- Page p = page.getPage();
- renderPageAreas(p);
- } finally {
- this.currentPageViewport = null;
- }
- }
-
- /**
- * Renders page areas.
- *
- * @param page The page whos page areas are to be rendered
- */
- protected void renderPageAreas(Page page) {
- /* Spec does not appear to specify whether fo:region-body should
- appear above or below side regions in cases of overlap. FOP
- decision is to have fo:region-body on top, hence it is rendered
- last here. */
- RegionViewport viewport;
- viewport = page.getRegionViewport(FO_REGION_BEFORE);
- if (viewport != null) {
- renderRegionViewport(viewport);
- }
- viewport = page.getRegionViewport(FO_REGION_START);
- if (viewport != null) {
- renderRegionViewport(viewport);
- }
- viewport = page.getRegionViewport(FO_REGION_BODY);
- if (viewport != null) {
- renderRegionViewport(viewport);
- }
- viewport = page.getRegionViewport(FO_REGION_END);
- if (viewport != null) {
- renderRegionViewport(viewport);
- }
- viewport = page.getRegionViewport(FO_REGION_AFTER);
- if (viewport != null) {
- renderRegionViewport(viewport);
- }
- }
-
- /**
- * 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) {
- // 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;
- currentIPPosition = 0;
-
- RegionReference regionReference = port.getRegionReference();
- handleRegionTraits(port);
-
- // shouldn't the viewport have the CTM
- startVParea(regionReference.getCTM(), port.getClipRectangle());
- // do after starting viewport area
- if (regionReference.getRegionClass() == FO_REGION_BODY) {
- assert (regionReference instanceof BodyRegion);
- renderBodyRegion((BodyRegion) regionReference);
- } else {
- renderRegion(regionReference);
- }
- endVParea();
- }
-
- /**
- * Establishes a new viewport area.
- *
- * @param ctm the coordinate transformation matrix to use
- * @param clippingRect the clipping rectangle if the viewport should be clipping,
- * null if no clipping is performed.
- */
- protected abstract void startVParea(CTM ctm, Rectangle clippingRect);
-
- /**
- * Signals exit from a viewport area. Subclasses can restore transformation matrices
- * valid before the viewport area was started.
- */
- protected abstract void endVParea();
-
- /**
- * Handle the traits for a region
- * This is used to draw the traits for the given page region.
- * (See Sect. 6.4.1.2 of XSL-FO spec.)
- * @param rv the RegionViewport whose region is to be drawn
- */
- protected void handleRegionTraits(RegionViewport rv) {
- // draw border and background
- }
-
- /**
- * Renders a region reference area.
- *
- * @param region The region reference area
- */
- protected void renderRegion(RegionReference region) {
- renderBlocks(null, region.getBlocks());
- }
-
- /**
- * Renders a body region area.
- *
- * @param region The body region
- */
- protected void renderBodyRegion(BodyRegion region) {
- BeforeFloat bf = region.getBeforeFloat();
- if (bf != null) {
- renderBeforeFloat(bf);
- }
- MainReference mr = region.getMainReference();
- if (mr != null) {
- renderMainReference(mr);
- }
- Footnote foot = region.getFootnote();
- if (foot != null) {
- renderFootnote(foot);
- }
- }
-
- /**
- * Renders a before float area.
- *
- * @param bf The before float area
- */
- protected void renderBeforeFloat(BeforeFloat bf) {
- List blocks = bf.getChildAreas();
- if (blocks != null) {
- renderBlocks(null, blocks);
- Block sep = bf.getSeparator();
- if (sep != null) {
- renderBlock(sep);
- }
- }
- }
-
- /**
- * Renders a footnote
- *
- * @param footnote The footnote
- */
- protected void renderFootnote(Footnote footnote) {
- currentBPPosition += footnote.getTop();
- List blocks = footnote.getChildAreas();
- if (blocks != null) {
- Block sep = footnote.getSeparator();
- if (sep != null) {
- renderBlock(sep);
- }
- renderBlocks(null, blocks);
- }
- }
-
- /**
- * 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) {
- Span span = null;
- List spans = mr.getSpans();
- int saveBPPos = currentBPPosition;
- int saveSpanBPPos = saveBPPos;
- int saveIPPos = currentIPPosition;
- for (Object span1 : spans) {
- span = (Span) span1;
- int level = span.getBidiLevel();
- if (level < 0) {
- level = 0;
- }
- if ((level & 1) == 1) {
- currentIPPosition += span.getIPD();
- currentIPPosition += mr.getColumnGap();
- }
- for (int c = 0; c < span.getColumnCount(); c++) {
- NormalFlow flow = span.getNormalFlow(c);
- if (flow != null) {
- currentBPPosition = saveSpanBPPos;
- if ((level & 1) == 1) {
- currentIPPosition -= flow.getIPD();
- currentIPPosition -= mr.getColumnGap();
- }
- renderFlow(flow);
- if ((level & 1) == 0) {
- currentIPPosition += flow.getIPD();
- currentIPPosition += mr.getColumnGap();
- }
- }
- }
- currentIPPosition = saveIPPos;
- currentBPPosition = saveSpanBPPos + span.getHeight();
- saveSpanBPPos = currentBPPosition;
- }
- currentBPPosition = saveBPPos;
- }
-
- /**
- * Renders a flow reference area.
- *
- * @param flow The flow reference area
- */
- protected void renderFlow(NormalFlow flow) {
- // the normal flow reference area contains stacked blocks
- List blocks = flow.getChildAreas();
- if (blocks != null) {
- renderBlocks(null, blocks);
- }
- }
-
- /**
- * Handle block traits.
- * This method is called when the correct ip and bp posiiton is
- * set. This should be overridden to draw border and background
- * traits for the block area.
- *
- * @param block the block area
- */
- protected void handleBlockTraits(Block block) {
- // draw border and background
- }
-
- /**
- * 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) {
- boolean inNewLayer = false;
- if (maybeStartLayer(bv)) {
- inNewLayer = true;
- }
- // clip and position viewport if necessary
- if (bv.getPositioning() == Block.ABSOLUTE) {
- // save positions
- int saveIP = currentIPPosition;
- int saveBP = currentBPPosition;
-
- Rectangle clippingRect = null;
- if (bv.hasClip()) {
- clippingRect = new Rectangle(saveIP, saveBP, bv.getIPD(), bv.getBPD());
- }
-
- CTM ctm = bv.getCTM();
- currentIPPosition = 0;
- currentBPPosition = 0;
-
- startVParea(ctm, clippingRect);
- handleBlockTraits(bv);
- renderBlocks(bv, children);
- endVParea();
-
- // clip if necessary
-
- currentIPPosition = saveIP;
- currentBPPosition = saveBP;
- } else {
- // save position and offset
- int saveIP = currentIPPosition;
- int saveBP = currentBPPosition;
-
- handleBlockTraits(bv);
- renderBlocks(bv, children);
-
- currentIPPosition = saveIP;
- currentBPPosition = saveBP + bv.getAllocBPD();
- }
- maybeEndLayer(bv, inNewLayer);
- }
-
- /**
- * Renders a block area that represents a reference area. The reference area establishes
- * a new coordinate system.
- * @param block the block area
- */
- protected abstract void renderReferenceArea(Block block);
-
- /**
- * Renders a list of block areas.
- *
- * @param parent the parent block if the parent is a block, otherwise
- * a null value.
- * @param blocks The block areas
- */
- protected void renderBlocks(Block parent, List blocks) {
- int saveIP = currentIPPosition;
-
- // Calculate the position of the content rectangle.
- if (parent != null && !parent.getTraitAsBoolean(Trait.IS_VIEWPORT_AREA)) {
- currentBPPosition += parent.getBorderAndPaddingWidthBefore();
- }
-
- // the position of the containing block is used for
- // absolutely positioned areas
- int contBP = currentBPPosition;
- int contIP = currentIPPosition;
- containingBPPosition = currentBPPosition;
- containingIPPosition = currentIPPosition;
-
- for (Object obj : blocks) {
- if (obj instanceof Block) {
- currentIPPosition = contIP;
- containingBPPosition = contBP;
- containingIPPosition = contIP;
- renderBlock((Block) obj);
- containingBPPosition = contBP;
- containingIPPosition = contIP;
- } else if (obj instanceof LineArea) {
- // a line area is rendered from the top left position
- // of the line, each inline object is offset from there
- LineArea line = (LineArea) obj;
- if (parent != null) {
- int level = parent.getBidiLevel();
- if ((level == -1) || ((level & 1) == 0)) {
- currentIPPosition += parent.getStartIndent();
- } else {
- currentIPPosition += parent.getEndIndent();
- }
- }
- renderLineArea(line);
- currentBPPosition += line.getAllocBPD();
- }
- currentIPPosition = saveIP;
- }
- }
-
- /**
- * Renders a block area.
- *
- * @param block The block area
- */
- protected void renderBlock(Block block) {
- assert block != null;
- List children = block.getChildAreas();
- boolean inNewLayer = false;
- if (maybeStartLayer(block)) {
- inNewLayer = true;
- }
- if (block instanceof BlockViewport) {
- if (children != null) {
- renderBlockViewport((BlockViewport) block, children);
- } else {
- handleBlockTraits(block);
- // simply move position
- currentBPPosition += block.getAllocBPD();
- }
- } else if (block.getTraitAsBoolean(Trait.IS_REFERENCE_AREA)) {
- renderReferenceArea(block);
- } else {
- // save position and offset
- int saveIP = currentIPPosition;
- int saveBP = currentBPPosition;
-
- currentIPPosition += block.getXOffset();
- currentBPPosition += block.getYOffset();
- currentBPPosition += block.getSpaceBefore();
-
- handleBlockTraits(block);
-
- if (children != null && block.getTrait(Trait.VISIBILITY) != Visibility.HIDDEN)
- {
- renderBlocks(block, children);
- }
-
- if (block.getPositioning() == Block.ABSOLUTE) {
- // absolute blocks do not effect the layout
- currentBPPosition = saveBP;
- } else {
- // stacked and relative blocks effect stacking
- currentIPPosition = saveIP;
- currentBPPosition = saveBP + block.getAllocBPD();
- }
- }
- maybeEndLayer(block, inNewLayer);
- }
-
- /**
- * Establish new optional content group layer.
- * @param layer name of layer
- */
- protected abstract void startLayer(String layer);
-
- /**
- * Finish current optional content group layer.
- */
- protected abstract void endLayer();
-
- protected boolean maybeStartLayer(Area area) {
- String layer = (String) area.getTrait(Trait.LAYER);
- if (layer != null) {
- if (layers == null) {
- layers = new Stack<String>();
- }
- if (layers.empty() || !layers.peek().equals(layer)) {
- layers.push(layer);
- startLayer(layer);
- return true;
- }
- }
- return false;
- }
-
- protected void maybeEndLayer(Area area, boolean inNewLayer) {
- if (inNewLayer) {
- assert layers != null;
- assert !layers.empty();
- String layer = (String) area.getTrait(Trait.LAYER);
- assert layer != null;
- assert layers.peek().equals(layer);
- endLayer();
- layers.pop();
- }
- }
-
- /**
- * 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();
- int saveBP = currentBPPosition;
- currentBPPosition += line.getSpaceBefore();
- int bl = line.getBidiLevel();
- if (bl >= 0) {
- if ((bl & 1) == 0) {
- currentIPPosition += line.getStartIndent();
- } else {
- currentIPPosition += line.getEndIndent();
- }
- } else {
- currentIPPosition += line.getStartIndent();
- }
- for (Object aChildren : children) {
- InlineArea inline = (InlineArea) aChildren;
- renderInlineArea(inline);
- }
- currentBPPosition = saveBP;
- }
-
- /**
- * Render the given InlineArea.
- * @param inlineArea inline area text to render
- */
- protected void renderInlineArea(InlineArea inlineArea) {
- if (inlineArea instanceof TextArea) {
- renderText((TextArea) inlineArea);
- //} else if (inlineArea instanceof Character) {
- //renderCharacter((Character) inlineArea);
- } else if (inlineArea instanceof WordArea) {
- renderWord((WordArea) inlineArea);
- } else if (inlineArea instanceof SpaceArea) {
- renderSpace((SpaceArea) inlineArea);
- } else if (inlineArea instanceof InlineParent) {
- renderInlineParent((InlineParent) inlineArea);
- } else if (inlineArea instanceof InlineBlockParent) {
- renderInlineBlockParent((InlineBlockParent) inlineArea);
- } else if (inlineArea instanceof Space) {
- renderInlineSpace((Space) inlineArea);
- } else if (inlineArea instanceof InlineViewport) {
- renderInlineViewport((InlineViewport) inlineArea);
- } else if (inlineArea instanceof Leader) {
- renderLeader((Leader) inlineArea);
- }
- }
-
- /**
- * Common method to render the background and borders for any inline area.
- * The all borders and padding are drawn outside the specified area.
- * @param area the inline area for which the background, border and padding is to be
- * rendered
- */
- protected abstract void renderInlineAreaBackAndBorders(InlineArea area);
-
- /**
- * Render the given Space.
- * @param space the space to render
- */
- protected void renderInlineSpace(Space space) {
- renderInlineAreaBackAndBorders(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
- currentIPPosition += space.getAllocIPD();
- }
-
- /**
- * Render the given Leader.
- * @param area the leader to render
- */
- protected void renderLeader(Leader area) {
- currentIPPosition += area.getAllocIPD();
- }
-
- /**
- * Render the given TextArea.
- * @param text the text to render
- */
- protected void renderText(TextArea text) {
- List children = text.getChildAreas();
- int saveIP = currentIPPosition;
- int saveBP = currentBPPosition;
- for (Object aChildren : children) {
- InlineArea inline = (InlineArea) aChildren;
- renderInlineArea(inline);
- }
- currentIPPosition = saveIP + text.getAllocIPD();
- }
-
- /**
- * Render the given WordArea.
- * @param word the word to render
- */
- protected void renderWord(WordArea word) {
- currentIPPosition += word.getAllocIPD();
- }
-
- /**
- * Render the given SpaceArea.
- * @param space the space to render
- */
- protected void renderSpace(SpaceArea space) {
- currentIPPosition += space.getAllocIPD();
- }
-
- /**
- * Render the given InlineParent.
- * @param ip the inline parent to render
- */
- protected void renderInlineParent(InlineParent ip) {
- boolean inNewLayer = false;
- if (maybeStartLayer(ip)) {
- inNewLayer = true;
- }
- int level = ip.getBidiLevel();
- List children = ip.getChildAreas();
- renderInlineAreaBackAndBorders(ip);
- int saveIP = currentIPPosition;
- int saveBP = currentBPPosition;
- // if inline parent is a filled area (generated by Leader), and if
- // it is right-to-left, then adjust starting ip position in order to
- // align children to starting (right) edge of filled area
- int ipAdjust;
- if ((ip instanceof FilledArea) && ((level & 1) != 0)) {
- int ipdChildren = 0;
- for (Object aChildren : children) {
- InlineArea inline = (InlineArea) aChildren;
- ipdChildren += inline.getAllocIPD();
- }
- ipAdjust = ip.getAllocIPD() - ipdChildren;
- } else {
- ipAdjust = 0;
- }
- // perform inline position adjustments
- if ((level == -1) || ((level & 1) == 0)) {
- currentIPPosition += ip.getBorderAndPaddingWidthStart();
- } else {
- currentIPPosition += ip.getBorderAndPaddingWidthEnd();
- if (ipAdjust > 0) {
- currentIPPosition += ipAdjust;
- }
- }
- currentBPPosition += ip.getBlockProgressionOffset();
- // render children inlines
- for (Object aChildren : children) {
- InlineArea inline = (InlineArea) aChildren;
- renderInlineArea(inline);
- }
- currentIPPosition = saveIP + ip.getAllocIPD();
- currentBPPosition = saveBP;
- maybeEndLayer(ip, inNewLayer);
- }
-
- /**
- * Render the given InlineBlockParent.
- * @param ibp the inline block parent to render
- */
- protected void renderInlineBlockParent(InlineBlockParent ibp) {
- int level = ibp.getBidiLevel();
- renderInlineAreaBackAndBorders(ibp);
- if ((level == -1) || ((level & 1) == 0)) {
- currentIPPosition += ibp.getBorderAndPaddingWidthStart();
- } else {
- currentIPPosition += ibp.getBorderAndPaddingWidthEnd();
- }
- // For inline content the BP position is updated by the enclosing line area
- int saveBP = currentBPPosition;
- currentBPPosition += ibp.getBlockProgressionOffset();
- renderBlock(ibp.getChildArea());
- currentBPPosition = saveBP;
- }
-
- /**
- * Render the given Viewport.
- * @param viewport the viewport to render
- */
- protected void renderInlineViewport(InlineViewport viewport) {
- Area content = viewport.getContent();
- int saveBP = currentBPPosition;
- currentBPPosition += viewport.getBlockProgressionOffset();
- Rectangle2D contpos = viewport.getContentPosition();
- if (content instanceof Image) {
- renderImage((Image) content, contpos);
- } else if (content instanceof Container) {
- renderContainer((Container) content);
- } else if (content instanceof ForeignObject) {
- renderForeignObject((ForeignObject) content, contpos);
- } else if (content instanceof InlineBlockParent) {
- renderInlineBlockParent((InlineBlockParent) content);
- }
- currentIPPosition += viewport.getAllocIPD();
- 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.
- }
-
- /**
- * Tells the renderer to render an inline container.
- * @param cont The inline container area
- */
- protected void renderContainer(Container cont) {
- int saveIP = currentIPPosition;
- int saveBP = currentBPPosition;
-
- List blocks = cont.getBlocks();
- renderBlocks(null, blocks);
- currentIPPosition = saveIP;
- 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
- */
- protected void renderForeignObject(ForeignObject fo, Rectangle2D pos) {
- // Default: do nothing.
- // Some renderers (ex. Text) don't support foreign objects.
- }
-
- /**
- * Render the xml document with the given xml namespace.
- * The Render Context is by the handle to render into the current
- * rendering target.
- * @param ctx rendering context
- * @param doc DOM Document containing the source document
- * @param namespace Namespace URI of the document
- */
- public void renderXML(RendererContext ctx, Document doc,
- String namespace) {
- XMLHandler handler = userAgent.getXMLHandlerRegistry().getXMLHandler(
- this, namespace);
- if (handler != null) {
- try {
- XMLHandlerConfigurator configurator
- = new XMLHandlerConfigurator(userAgent);
- configurator.configure(ctx, namespace);
- handler.handleXML(ctx, doc, namespace);
- } catch (Exception e) {
- // could not handle document
- ResourceEventProducer eventProducer
- = ResourceEventProducer.Provider.get(
- ctx.getUserAgent().getEventBroadcaster());
- eventProducer.foreignXMLProcessingError(this, doc, namespace, e);
- }
- } else {
- if (warnedXMLHandlers == null) {
- warnedXMLHandlers = new java.util.HashSet();
- }
- if (!warnedXMLHandlers.contains(namespace)) {
- // no handler found for document
- warnedXMLHandlers.add(namespace);
- ResourceEventProducer eventProducer = ResourceEventProducer.Provider.get(
- ctx.getUserAgent().getEventBroadcaster());
- eventProducer.foreignXMLNoHandler(this, doc, namespace);
- }
- }
- }
-
- /**
- * Converts a millipoint-based transformation matrix to points.
- * @param at a millipoint-based transformation matrix
- * @return a point-based transformation matrix
- */
- protected AffineTransform mptToPt(AffineTransform at) {
- double[] matrix = new double[6];
- at.getMatrix(matrix);
- //Convert to points
- matrix[4] = matrix[4] / 1000;
- matrix[5] = matrix[5] / 1000;
- return new AffineTransform(matrix);
- }
-
- /**
- * Converts a point-based transformation matrix to millipoints.
- * @param at a point-based transformation matrix
- * @return a millipoint-based transformation matrix
- */
- protected AffineTransform ptToMpt(AffineTransform at) {
- double[] matrix = new double[6];
- at.getMatrix(matrix);
- //Convert to millipoints
- //Math.round() because things like this can happen: 65.6 * 1000 = 65.599999999999999
- //which is bad for testing
- matrix[4] = Math.round(matrix[4] * 1000);
- matrix[5] = Math.round(matrix[5] * 1000);
- return new AffineTransform(matrix);
- }
- }
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