Examples of KnuthGlue

org.apache.fop.layoutmgr.KnuthGlue
An instance of this class represents a piece of content with adjustable width: for example a space between words of justified text. A KnuthGlue is a feasible breaking point only if it immediately follows a KnuthBox. The represented piece of content is suppressed if either the KnuthGlue is a chosen breaking point or there isn't any KnuthBox between the previous breaking point and the KnuthGlue itself. So, an unsuppressible piece of content with adjustable width, for example a leader or a word with adjustable letter space, cannot be represented by a single KnuthGlue; it can be represented using the sequence: KnuthBox(width = 0) KnuthPenalty(width = 0, penalty = infinity) KnuthGlue(...) KnuthBox(width = 0) where the infinity penalty avoids choosing the KnuthGlue as a breaking point and the 0-width KnuthBoxes prevent suppression. Besides the inherited methods and attributes, this class has two attributes used to store the stretchability (difference between max and opt width) and the shrinkability (difference between opt and min width), and the methods to get these values.

Examples of org.apache.fop.layoutmgr.KnuthGlue

     * @throws Exception if the test fails
     */
    public void testRemoveElementPenalty2() throws Exception {
        LinkedList lst = new LinkedList();
        lst.add(new KnuthBox(4000, null, false));
        lst.add(new KnuthGlue(0, 0, 0, null, false));
        lst.add(new KnuthBox(4000, null, false));
        lst.add(new KnuthGlue(0, 0, 0, null, false));
        lst.add(new KnuthBox(4000, null, false));
        lst.add(new KnuthGlue(0, 0, 0, null, false));
        lst.add(new KnuthBox(4000, null, false));
        lst.add(new KnuthPenalty(0, KnuthElement.INFINITE, false, null, false));
        lst.add(new KnuthGlue(0, Integer.MAX_VALUE, 0, null, false));
        lst.add(new KnuthPenalty(0, -KnuthElement.INFINITE, false, null, false));
        
        boolean res = ElementListUtils.removeLegalBreaks(lst, 9000);
        
        assertFalse(res);

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Examples of org.apache.fop.layoutmgr.KnuthGlue

        lst.add(new KnuthPenalty(0, 200, false, null, false));
        lst.add(new KnuthBox(4000, null, false));
        lst.add(new KnuthPenalty(0, 0, false, null, false));
        lst.add(new KnuthBox(4000, null, false));
        lst.add(new KnuthPenalty(0, KnuthElement.INFINITE, false, null, false));
        lst.add(new KnuthGlue(0, Integer.MAX_VALUE, 0, null, false));
        lst.add(new KnuthPenalty(0, -KnuthElement.INFINITE, false, null, false));
        
        boolean res = ElementListUtils.removeLegalBreaksFromEnd(lst, 9000);
        
        assertFalse(res);

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Examples of org.apache.fop.layoutmgr.KnuthGlue

        lst.add(new KnuthBox(4000, null, false));
        lst.add(new KnuthPenalty(0, 0, false, null, false));
        lst.add(new KnuthBox(4000, null, false));
        lst.add(new KnuthPenalty(0, 200, false, null, false));
        lst.add(new KnuthBox(4000, null, false));
        lst.add(new KnuthGlue(0, 0, 0, null, false));
        lst.add(new KnuthBox(4000, null, false));
        lst.add(new KnuthPenalty(0, KnuthElement.INFINITE, false, null, false));
        lst.add(new KnuthGlue(0, Integer.MAX_VALUE, 0, null, false));
        lst.add(new KnuthPenalty(0, -KnuthElement.INFINITE, false, null, false));
        
        boolean res = ElementListUtils.removeLegalBreaksFromEnd(lst, 9000);
        
        assertFalse(res);

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Examples of org.apache.fop.layoutmgr.KnuthGlue

                rowHeightSmallerThanFirstStep = false;
                p = KnuthPenalty.INFINITE;
            }
            returnList.add(new BreakElement(penaltyPos, effPenaltyLen, p, nextBreakClass, context));
            if (penaltyOrGlueLen < 0) {
                returnList.add(new KnuthGlue(-penaltyOrGlueLen, 0, 0, new Position(null), true));
            }


            laststep = step;
            step = getNextStep();
        } while (step >= 0);

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Examples of org.apache.fop.layoutmgr.KnuthGlue

                         + commonBorderPaddingBackground.getPaddingStart(false, this);
            if (ipStart > 0) {
                // Add a non breakable glue
                returnList.add(new KnuthPenalty(0, KnuthPenalty.INFINITE, 
                                                false, new LeafPosition(this, -1), true));
                returnList.add(new KnuthGlue(ipStart, 0, 0, new LeafPosition(this, -1), true));
            }
        }
    }

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Examples of org.apache.fop.layoutmgr.KnuthGlue

                        + commonBorderPaddingBackground.getPaddingEnd(false, this);
            if (ipEnd > 0) {
                // Add a non breakable glue
                returnList.add(new KnuthPenalty(0, KnuthPenalty.INFINITE,
                                                false, new LeafPosition(this, -1), true));
                returnList.add(new KnuthGlue(ipEnd, 0, 0, new LeafPosition(this, -1), true));
            }
        }
    }

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Examples of org.apache.fop.layoutmgr.KnuthGlue

                                    new LeafPosition(this, -1), true));
        seq.add(new KnuthPenalty(0, KnuthElement.INFINITE, false,
                                        new LeafPosition(this, -1), true));
        if (alignment == EN_JUSTIFY || alignment == 0) {
            seq.add
                (new KnuthGlue(areaInfo.ipdArea.opt,
                               areaInfo.ipdArea.max - areaInfo.ipdArea.opt,
                               areaInfo.ipdArea.opt - areaInfo.ipdArea.min, 
                               new LeafPosition(this, 0), false));
        } else {
            seq.add
                (new KnuthGlue(areaInfo.ipdArea.opt,
                               0,
                               0, 
                               new LeafPosition(this, 0), false));
        }
        seq.add(new KnuthInlineBox(0, alignmentContext,

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Examples of org.apache.fop.layoutmgr.KnuthGlue

                                    new LeafPosition(this, -1), true));
        returnList.add(new KnuthPenalty(0, KnuthElement.INFINITE, false,
                                        new LeafPosition(this, -1), true));
        if (alignment == EN_JUSTIFY || alignment == 0) {
            returnList.add
                (new KnuthGlue(areaInfo.ipdArea.opt,
                               areaInfo.ipdArea.max - areaInfo.ipdArea.opt,
                               areaInfo.ipdArea.opt - areaInfo.ipdArea.min, 
                               new LeafPosition(this, 0), false));
        } else {
            returnList.add
                (new KnuthGlue(areaInfo.ipdArea.opt,
                               0,
                               0, 
                               new LeafPosition(this, 0), false));
        }
        returnList.add(new KnuthInlineBox(0, areaInfo.alignmentContext,

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Examples of org.apache.fop.layoutmgr.KnuthGlue

                // when starting a line
                spaceElements.add(new KnuthInlineBox(0, null,
                        notifyPos(new LeafPosition(this, -1)), true));
                spaceElements.add(new KnuthPenalty(0, KnuthElement.INFINITE,
                        false, new LeafPosition(this, -1), false));
                spaceElements.add(new KnuthGlue(ai.ipdArea.opt, ai.ipdArea.max - ai.ipdArea.opt, 
                        ai.ipdArea.opt - ai.ipdArea.min, mainPosition, false));
            } else {
                // the space does not need to stretch or shrink, and must be
                // preserved when starting a line
                spaceElements.add(new KnuthInlineBox(ai.ipdArea.opt, null,
                        mainPosition, true));
            }
        } else {
            if (textArray[ai.iStartIndex] != CharUtilities.SPACE
                    || foText.getWhitespaceTreatment() == Constants.EN_PRESERVE) {
                // a breaking space that needs to be preserved
                switch (alignment) {
                case EN_CENTER:
                    // centered text:
                    // if the second element is chosen as a line break these elements 
                    // add a constant amount of stretch at the end of a line and at the
                    // beginning of the next one, otherwise they don't add any stretch
                    spaceElements.add(new KnuthGlue(lineEndBAP,
                            3 * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                            new LeafPosition(this, -1), false));
                    spaceElements
                            .add(new KnuthPenalty(
                                    0,
                                    0, false,
                                    new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthGlue(
                            - (lineStartBAP + lineEndBAP), -6
                            * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                            new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthInlineBox(0, null,
                            notifyPos(new LeafPosition(this, -1)), false));
                    spaceElements.add(new KnuthPenalty(0, KnuthElement.INFINITE,
                            false, new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthGlue(ai.ipdArea.opt + lineStartBAP,
                            3 * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                            mainPosition, false));
                    break;


                case EN_START: // fall through
                case EN_END:
                    // left- or right-aligned text:
                    // if the second element is chosen as a line break these elements 
                    // add a constant amount of stretch at the end of a line, otherwise
                    // they don't add any stretch
                    spaceElements.add(new KnuthGlue(lineEndBAP,
                            3 * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                            new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthPenalty(0, 0, false,
                            new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthGlue(
                            - (lineStartBAP + lineEndBAP), -3
                            * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                            new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthInlineBox(0, null,
                            notifyPos(new LeafPosition(this, -1)), false));
                    spaceElements.add(new KnuthPenalty(0,
                            KnuthElement.INFINITE, false, new LeafPosition(
                                    this, -1), false));
                    spaceElements.add(new KnuthGlue(ai.ipdArea.opt + lineStartBAP, 0, 0,
                            mainPosition, false));
                    break;


                case EN_JUSTIFY:
                    // justified text:
                    // the stretch and shrink depends on the space width
                    spaceElements.add(new KnuthGlue(lineEndBAP, 0, 0,
                            new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthPenalty(0, 0, false,
                            new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthGlue(
                            - (lineStartBAP + lineEndBAP), ai.ipdArea.max
                            - ai.ipdArea.opt, ai.ipdArea.opt - ai.ipdArea.min,
                            new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthInlineBox(0, null,
                            notifyPos(new LeafPosition(this, -1)), false));
                    spaceElements.add(new KnuthPenalty(0,
                            KnuthElement.INFINITE, false, new LeafPosition(
                                    this, -1), false));
                    spaceElements.add(new KnuthGlue(lineStartBAP + ai.ipdArea.opt, 0, 0,
                            mainPosition, false));
                    break;


                default:
                    // last line justified, the other lines unjustified:
                    // use only the space stretch
                    spaceElements.add(new KnuthGlue(lineEndBAP, 0, 0,
                            new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthPenalty(0, 0, false,
                            new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthGlue(
                            - (lineStartBAP + lineEndBAP), ai.ipdArea.max
                            - ai.ipdArea.opt, 0,
                            new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthInlineBox(0, null,
                            notifyPos(new LeafPosition(this, -1)), false));
                    spaceElements.add(new KnuthPenalty(0,
                            KnuthElement.INFINITE, false, new LeafPosition(
                                    this, -1), false));
                    spaceElements.add(new KnuthGlue(lineStartBAP + ai.ipdArea.opt, 0, 0,
                            mainPosition, false));
                } 
            } else {
                // a (possible block) of breaking spaces
                switch (alignment) {
                case EN_CENTER:
                    // centered text:
                    // if the second element is chosen as a line break these elements 
                    // add a constant amount of stretch at the end of a line and at the
                    // beginning of the next one, otherwise they don't add any stretch
                    spaceElements.add(new KnuthGlue(lineEndBAP,
                            3 * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                            new LeafPosition(this, -1), false));
                    spaceElements
                            .add(new KnuthPenalty(
                                    0, 0, false,
                                    new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthGlue(ai.ipdArea.opt
                            - (lineStartBAP + lineEndBAP), -6
                            * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                            mainPosition, false));
                    spaceElements.add(new KnuthInlineBox(0, null,
                            notifyPos(new LeafPosition(this, -1)), false));
                    spaceElements.add(new KnuthPenalty(0, KnuthElement.INFINITE,
                            false, new LeafPosition(this, -1), false));
                    spaceElements.add(new KnuthGlue(lineStartBAP,
                            3 * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                            new LeafPosition(this, -1), false));
                    break;


                case EN_START: // fall through
                case EN_END:
                    // left- or right-aligned text:
                    // if the second element is chosen as a line break these elements 
                    // add a constant amount of stretch at the end of a line, otherwise
                    // they don't add any stretch
                    if (lineStartBAP != 0 || lineEndBAP != 0) {
                        spaceElements.add(new KnuthGlue(lineEndBAP,
                                3 * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                                new LeafPosition(this, -1), false));
                        spaceElements.add(new KnuthPenalty(0, 0, false,
                                new LeafPosition(this, -1), false));
                        spaceElements.add(new KnuthGlue(ai.ipdArea.opt
                                - (lineStartBAP + lineEndBAP), -3
                                * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                                mainPosition, false));
                        spaceElements.add(new KnuthInlineBox(0, null,
                                notifyPos(new LeafPosition(this, -1)), false));
                        spaceElements.add(new KnuthPenalty(0,
                                KnuthElement.INFINITE, false, new LeafPosition(
                                        this, -1), false));
                        spaceElements.add(new KnuthGlue(lineStartBAP, 0, 0,
                                new LeafPosition(this, -1), false));
                    } else {
                        spaceElements.add(new KnuthGlue(0,
                                3 * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                                new LeafPosition(this, -1), false));
                        spaceElements.add(new KnuthPenalty(0, 0, false,
                                new LeafPosition(this, -1), false));
                        spaceElements.add(new KnuthGlue(ai.ipdArea.opt, -3
                                * LineLayoutManager.DEFAULT_SPACE_WIDTH, 0,
                                mainPosition, false));
                    }
                    break;


                case EN_JUSTIFY:
                    // justified text:
                    // the stretch and shrink depends on the space width
                    if (lineStartBAP != 0 || lineEndBAP != 0) {
                        spaceElements.add(new KnuthGlue(lineEndBAP, 0, 0,
                                new LeafPosition(this, -1), false));
                        spaceElements.add(new KnuthPenalty(0, 0, false,
                                new LeafPosition(this, -1), false));
                        spaceElements.add(new KnuthGlue(
                                ai.ipdArea.opt - (lineStartBAP + lineEndBAP),
                                ai.ipdArea.max - ai.ipdArea.opt,
                                ai.ipdArea.opt - ai.ipdArea.min,
                                mainPosition, false));
                        spaceElements.add(new KnuthInlineBox(0, null,
                                notifyPos(new LeafPosition(this, -1)), false));
                        spaceElements.add(new KnuthPenalty(0,
                                KnuthElement.INFINITE, false, new LeafPosition(
                                        this, -1), false));
                        spaceElements.add(new KnuthGlue(lineStartBAP, 0, 0,
                                new LeafPosition(this, -1), false));
                    } else {
                        spaceElements.add(new KnuthGlue(ai.ipdArea.opt,
                                ai.ipdArea.max - ai.ipdArea.opt,
                                ai.ipdArea.opt - ai.ipdArea.min,
                                mainPosition, false));
                    }
                    break;


                default:
                    // last line justified, the other lines unjustified:
                    // use only the space stretch
                    if (lineStartBAP != 0 || lineEndBAP != 0) {
                        spaceElements.add(new KnuthGlue(lineEndBAP, 0, 0,
                                new LeafPosition(this, -1), false));
                        spaceElements.add(new KnuthPenalty(0, 0, false,
                                new LeafPosition(this, -1), false));
                        spaceElements.add(new KnuthGlue(
                                ai.ipdArea.opt - (lineStartBAP + lineEndBAP),
                                ai.ipdArea.max - ai.ipdArea.opt,
                                0, mainPosition, false));
                        spaceElements.add(new KnuthInlineBox(0, null,
                                notifyPos(new LeafPosition(this, -1)), false));
                        spaceElements.add(new KnuthPenalty(0,
                                KnuthElement.INFINITE, false, new LeafPosition(
                                        this, -1), false));
                        spaceElements.add(new KnuthGlue(lineStartBAP, 0, 0,
                                new LeafPosition(this, -1), false));
                    } else {
                        spaceElements.add(new KnuthGlue(ai.ipdArea.opt,
                                ai.ipdArea.max - ai.ipdArea.opt, 0,
                                mainPosition, false));
                    }
                }
            }

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Examples of org.apache.fop.layoutmgr.KnuthGlue

                        notifyPos(mainPosition), false));
            wordElements.add
                (new KnuthPenalty(0, KnuthElement.INFINITE, false,
                        new LeafPosition(this, -1), true));
            wordElements.add
                (new KnuthGlue(unsuppressibleLetterSpaces * letterSpaceWidth.opt,
                        unsuppressibleLetterSpaces * (letterSpaceWidth.max - letterSpaceWidth.opt),
                        unsuppressibleLetterSpaces * (letterSpaceWidth.opt - letterSpaceWidth.min),
                        new LeafPosition(this, -1), true));
            wordElements.add
                (new KnuthInlineBox(0, null,

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