Package org.apache.fop.layoutmgr

Examples of org.apache.fop.layoutmgr.KnuthSequence


            LayoutManager lastLM = null;
           
            LineBreakPosition lbp = (LineBreakPosition) pos;
            int iCurrParIndex;
            iCurrParIndex = lbp.iParIndex;
            KnuthSequence seq = (KnuthSequence) knuthParagraphs.get(iCurrParIndex);
            int iStartElement = lbp.iStartIndex;
            int iEndElement = lbp.getLeafPos();
           
            LineArea lineArea
              = new LineArea((lbp.getLeafPos() < seq.size() - 1
                              ? textAlignment : textAlignmentLast),
                              lbp.difference, lbp.availableStretch, lbp.availableShrink);
            if (lbp.startIndent != 0) {
                lineArea.addTrait(Trait.START_INDENT, new Integer(lbp.startIndent));
            }
            lineArea.setBPD(lbp.lineHeight);
            lineArea.setIPD(lbp.lineWidth);
            lineArea.addTrait(Trait.SPACE_BEFORE, new Integer(lbp.spaceBefore));
            lineArea.addTrait(Trait.SPACE_AFTER, new Integer(lbp.spaceAfter));
            alignmentContext.resizeLine(lbp.lineHeight, lbp.baseline);
           
            if (seq instanceof Paragraph) {
                Paragraph currPar = (Paragraph) seq;
                // ignore the first elements added by the LineLayoutManager
                iStartElement += (iStartElement == 0) ? currPar.ignoreAtStart : 0;
               
                // if this is the last line area that for this paragraph,
                // ignore the last elements added by the LineLayoutManager and
                // subtract the last-line-end-indent from the area ipd
                if (iEndElement == (currPar.size() - 1)) {
                    iEndElement -= currPar.ignoreAtEnd;
                    lineArea.setIPD(lineArea.getIPD() - lastLineEndIndent.getValue(this));
                }
            }
           
            // Remove trailing spaces if allowed so
            if (whiteSpaceTreament == EN_IGNORE_IF_SURROUNDING_LINEFEED
                || whiteSpaceTreament == EN_IGNORE
                || whiteSpaceTreament == EN_IGNORE_IF_BEFORE_LINEFEED) {
                // ignore the last element in the line if it is a KnuthGlue object
                seqIterator = seq.listIterator(iEndElement);
                tempElement = (KnuthElement) seqIterator.next();
                if (tempElement.isGlue()) {
                    iEndElement--;
                    // this returns the same KnuthElement
                    seqIterator.previous();
                    if (seqIterator.hasPrevious()) {
                        tempElement = (KnuthElement) seqIterator.previous();
                    } else {
                        tempElement = null;
                    }
                }
                if (tempElement != null) {
                    lastLM = tempElement.getLayoutManager();
                }
            }
           
            // Remove leading spaces if allowed so
            if (whiteSpaceTreament == EN_IGNORE_IF_SURROUNDING_LINEFEED
                || whiteSpaceTreament == EN_IGNORE
                || whiteSpaceTreament == EN_IGNORE_IF_AFTER_LINEFEED) {
                // ignore KnuthGlue and KnuthPenalty objects
                // at the beginning of the line
                seqIterator = seq.listIterator(iStartElement);
                tempElement = (KnuthElement) seqIterator.next();
                while (!tempElement.isBox() && seqIterator.hasNext()) {
                    tempElement = (KnuthElement) seqIterator.next();
                    iStartElement++;
                }
            }
            // Add the inline areas to lineArea
            PositionIterator inlinePosIter
              = new KnuthPossPosIter(seq, iStartElement, iEndElement + 1);
           
            iStartElement = lbp.getLeafPos() + 1;
            if (iStartElement == seq.size()) {
                // advance to next paragraph
                iStartElement = 0;
            }
           
            LayoutContext lc = new LayoutContext(0);
View Full Code Here


                ignoreAtStart++;
            }
        }

        public void endParagraph() {
            KnuthSequence finishedPar = this.endSequence();
            if (finishedPar != null) {
                knuthParagraphs.add(finishedPar);
            }
        }
View Full Code Here

            }
        }
        if (returnedList.size() == 0) {
            //Inline part of the footnote is empty. Need to send back an auxiliary
            //zero-width, zero-height inline box so the footnote gets painted.
            KnuthSequence seq = new InlineKnuthSequence();
            //Need to use an aux. box, otherwise, the line height can't be forced to zero height.
            forcedAnchor = new KnuthInlineBox(0, null, null, true);
            seq.add(forcedAnchor);
            returnedList.add(seq);
        }
        setFinished(true);

        addAnchor(returnedList);
View Full Code Here

                KnuthElement element = (KnuthElement)obj;
                if (element instanceof KnuthInlineBox) {
                    lastBox = (KnuthInlineBox) element;
                }
            } else {
                KnuthSequence seq = (KnuthSequence)obj;
                ListIterator nestedIterator = seq.listIterator(seq.size());
                while (nestedIterator.hasPrevious() && lastBox == null) {
                    KnuthElement element = (KnuthElement)nestedIterator.previous();
                    if (element instanceof KnuthInlineBox && !element.isAuxiliary()
                            || element == forcedAnchor) {
                        lastBox = (KnuthInlineBox) element;
View Full Code Here

        lineStartBAP = context.getLineStartBorderAndPaddingWidth();
        lineEndBAP = context.getLineEndBorderAndPaddingWidth();
        alignmentContext = context.getAlignmentContext();

        LinkedList returnList = new LinkedList();
        KnuthSequence sequence = new InlineKnuthSequence();
        AreaInfo ai = null;
        returnList.add(sequence);

        while (iNextStart < textArray.length) {
            char ch = textArray[iNextStart];
            if (ch == CharUtilities.SPACE
                && foText.getWhitespaceTreatment() != Constants.EN_PRESERVE) {
                // normal non preserved space - collect them all
                // advance to the next character
                iThisStart = iNextStart;
                iNextStart++;
                while (iNextStart < textArray.length
                    && textArray[iNextStart] == CharUtilities.SPACE) {
                    iNextStart++;
                }
                // create the AreaInfo object
                ai = new AreaInfo(iThisStart, (short) (iNextStart),
                        (short) (iNextStart - iThisStart), (short) 0,
                        MinOptMax.multiply(wordSpaceIPD, iNextStart - iThisStart),
                        false, true);
                vecAreaInfo.add(ai);

                // create the elements
                sequence.addAll
                    (createElementsForASpace(alignment, ai, vecAreaInfo.size() - 1));

            } else if (ch == CharUtilities.SPACE || ch == CharUtilities.NBSPACE) {
                // preserved space or non-breaking space:
                // create the AreaInfo object
                ai = new AreaInfo(iNextStart, (short) (iNextStart + 1),
                        (short) 1, (short) 0,
                        wordSpaceIPD, false, true);
                vecAreaInfo.add(ai);

                // create the elements
                sequence.addAll
                    (createElementsForASpace(alignment, ai, vecAreaInfo.size() - 1));

                // advance to the next character
                iNextStart++;
            } else if (CharUtilities.isFixedWidthSpace(ch)) {
                // create the AreaInfo object
                MinOptMax ipd = new MinOptMax(font.getCharWidth(ch));
                ai = new AreaInfo(iNextStart, (short) (iNextStart + 1),
                        (short) 0, (short) 0,
                        ipd, false, true);
                vecAreaInfo.add(ai);

                // create the elements
                sequence.addAll
                    (createElementsForASpace(alignment, ai, vecAreaInfo.size() - 1));

                // advance to the next character
                iNextStart++;
            } else if (ch == NEWLINE) {
                // linefeed; this can happen when linefeed-treatment="preserve"
                // add a penalty item to the list and start a new sequence
                if (lineEndBAP != 0) {
                    sequence.add
                        (new KnuthGlue(lineEndBAP, 0, 0,
                                       new LeafPosition(this, -1), true));
                }
                sequence.endSequence();
                sequence = new InlineKnuthSequence();
                returnList.add(sequence);

                // advance to the next character
                iNextStart++;
            } else {
                // the beginning of a word
                iThisStart = iNextStart;
                iTempStart = iNextStart;
                for (; iTempStart < textArray.length
                        && !isSpace(textArray[iTempStart])
                        && textArray[iTempStart] != NEWLINE
                        && !(iTempStart > iNextStart
                             && isBreakChar(textArray[iTempStart - 1]));
                        iTempStart++) {
                    //nop, just find the word boundary
                }
               
                //Word boundary found, process widths and kerning
                int wordLength = iTempStart - iThisStart;
                boolean kerning = font.hasKerning();
                MinOptMax wordIPD = new MinOptMax(0);
                for (int i = iThisStart; i < iTempStart; i++) {
                    char c = textArray[i];
                   
                    //character width
                    int charWidth = font.getCharWidth(c);
                    wordIPD.add(charWidth);
                   
                    //kerning
                    int kern = 0;
                    if (kerning && (i > iThisStart)) {
                        char previous = textArray[i - 1];
                        kern = font.getKernValue(previous, c) * font.getFontSize() / 1000;
                        if (kern != 0) {
                            addToLetterAdjust(i + 1, kern);
                        }
                        wordIPD.add(kern);
                    }
                }
               
                int iLetterSpaces = wordLength - 1;
                // if the last character is '-' or '/' and the next one
                // is not a space, it could be used as a line end;
                // add one more letter space, in case other text follows
                if (isBreakChar(textArray[iTempStart - 1])
                        && iTempStart < textArray.length
                        && !isSpace(textArray[iTempStart])) {
                    iLetterSpaces++;
                }
                wordIPD.add(MinOptMax.multiply(letterSpaceIPD, iLetterSpaces));

                // create the AreaInfo object
                ai = new AreaInfo(iThisStart, iTempStart, (short) 0,
                        (short) iLetterSpaces,
                        wordIPD, false, false);
                vecAreaInfo.add(ai);

                // create the elements
                sequence.addAll(createElementsForAWordFragment(alignment, ai,
                        vecAreaInfo.size() - 1, letterSpaceIPD));

                // advance to the next character
                iNextStart = iTempStart;
            }
View Full Code Here

    /** @see org.apache.fop.layoutmgr.LayoutManager#getNextKnuthElements(LayoutContext, int) */
    public LinkedList getNextKnuthElements(LayoutContext context, int alignment) {
        MinOptMax ipd;
        curArea = get(context);
        KnuthSequence seq = new InlineKnuthSequence();

        if (curArea == null) {
            setFinished(true);
            return null;
        }

        ipd = new MinOptMax(font.getCharWidth(fobj.getCharacter()));

        curArea.setIPD(ipd.opt);
        curArea.setBPD(font.getAscender() - font.getDescender());

        TraitSetter.addFontTraits(curArea, font);
        curArea.addTrait(Trait.COLOR, fobj.getColor());

        // TODO: may need some special handling for fo:character
        alignmentContext = new AlignmentContext(font
                                    , font.getFontSize()
                                    , fobj.getAlignmentAdjust()
                                    , fobj.getAlignmentBaseline()
                                    , fobj.getBaselineShift()
                                    , fobj.getDominantBaseline()
                                    , context.getAlignmentContext());

        addKnuthElementsForBorderPaddingStart(seq);
       
        // create the AreaInfo object to store the computed values
        areaInfo = new AreaInfo((short) 0, ipd, false, alignmentContext);

        // node is a fo:Character
        if (letterSpaceIPD.min == letterSpaceIPD.max) {
            // constant letter space, only return a box
            seq.add(new KnuthInlineBox(areaInfo.ipdArea.opt, areaInfo.alignmentContext,
                                        notifyPos(new LeafPosition(this, 0)), false));
        } else {
            // adjustable letter space, return a sequence of elements;
            // at the moment the character is supposed to have no letter spaces,
            // but returning this sequence allows us to change only one element
            // if addALetterSpaceTo() is called
            seq.add(new KnuthInlineBox(areaInfo.ipdArea.opt, areaInfo.alignmentContext,
                                        notifyPos(new LeafPosition(this, 0)), false));
            seq.add(new KnuthPenalty(0, KnuthElement.INFINITE, false,
                                            new LeafPosition(this, -1), true));
            seq.add(new KnuthGlue(0, 0, 0,
                                         new LeafPosition(this, -1), true));
            seq.add(new KnuthInlineBox(0, null,
                                        notifyPos(new LeafPosition(this, -1)), true));
        }

        addKnuthElementsForBorderPaddingEnd(seq);

View Full Code Here

        // create the AreaInfo object to store the computed values
        areaInfo = new AreaInfo((short) 0, ipd, false, alignmentContext);

        // node is a fo:ExternalGraphic, fo:InstreamForeignObject,
        // fo:PageNumber or fo:PageNumberCitation
        KnuthSequence seq = new InlineKnuthSequence();

        addKnuthElementsForBorderPaddingStart(seq);
       
        seq.add(new KnuthInlineBox(areaInfo.ipdArea.opt, alignmentContext,
                                    notifyPos(new LeafPosition(this, 0)), false));

        addKnuthElementsForBorderPaddingEnd(seq);
       
        LinkedList returnList = new LinkedList();
View Full Code Here

        super.setUp();
        DebugHelper.registerStandardElementListObservers();
    }

    private KnuthSequence getKnuthSequence1() {
        KnuthSequence seq = new BlockKnuthSequence();
        for (int i = 0; i < 5; i++) {
            seq.add(new KnuthBox(0, null, true));
            seq.add(new KnuthPenalty(0, KnuthPenalty.INFINITE, false, null, true));
            seq.add(new KnuthGlue(5000, 0, 0, null, true));
            seq.add(new KnuthBox(10000, null, false));
            if (i < 4) {
                seq.add(new KnuthPenalty(0, 0, false, null, false));
                seq.add(new KnuthGlue(-5000, 0, 0, null, true));
            }
        }
       
        seq.add(new KnuthPenalty(0, KnuthPenalty.INFINITE, false, null, false));
        seq.add(new KnuthGlue(0, Integer.MAX_VALUE, 0, null, false));
        seq.add(new KnuthPenalty(0, -KnuthPenalty.INFINITE, false, null, false));
        ElementListObserver.observe(seq, "test", null);
        return seq;
    }
View Full Code Here

     * @throws Exception if an error occurs
     */
    public void test1() throws Exception {
        MyBreakingAlgorithm algo = new MyBreakingAlgorithm(0, 0, true, true, 0);
        algo.setConstantLineWidth(30000);
        KnuthSequence seq = getKnuthSequence1();
        algo.findBreakingPoints(seq, 1, true, BreakingAlgorithm.ALL_BREAKS);
        Part[] parts = algo.getParts();
        assertEquals("Sequence must produce 3 parts", 3, parts.length);
        assertEquals(5000, parts[0].difference);
        assertEquals(5000, parts[1].difference);
View Full Code Here

        super.setUp();
        DebugHelper.registerStandardElementListObservers();
    }

    private KnuthSequence getKnuthSequence1() {
        KnuthSequence seq = new KnuthSequence();
        for (int i = 0; i < 5; i++) {
            seq.add(new KnuthBox(0, null, true));
            seq.add(new KnuthPenalty(0, KnuthPenalty.INFINITE, false, null, true));
            seq.add(new KnuthGlue(5000, 0, 0, null, true));
            seq.add(new KnuthBox(10000, null, false));
            if (i < 4) {
                seq.add(new KnuthPenalty(0, 0, false, null, false));
                seq.add(new KnuthGlue(-5000, 0, 0, null, true));
            }
        }
       
        seq.add(new KnuthPenalty(0, KnuthPenalty.INFINITE, false, null, false));
        seq.add(new KnuthGlue(0, Integer.MAX_VALUE, 0, null, false));
        seq.add(new KnuthPenalty(0, -KnuthPenalty.INFINITE, false, null, false));
        ElementListObserver.observe(seq, "test", null);
        return seq;
    }
View Full Code Here

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