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/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2023 Apryse Group NV
    Authors: Apryse Software.

    This program is offered under a commercial and under the AGPL license.
    For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.

    AGPL licensing:
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see .
 */
package com.itextpdf.layout.renderer;

import com.itextpdf.commons.utils.MessageFormatUtil;
import com.itextpdf.io.logs.IoLogMessageConstant;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.layout.borders.Border;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.layout.LayoutArea;
import com.itextpdf.layout.layout.LayoutContext;
import com.itextpdf.layout.layout.LayoutResult;
import com.itextpdf.layout.layout.LineLayoutContext;
import com.itextpdf.layout.layout.LineLayoutResult;
import com.itextpdf.layout.layout.MinMaxWidthLayoutResult;
import com.itextpdf.layout.logs.LayoutLogMessageConstant;
import com.itextpdf.layout.margincollapse.MarginsCollapseHandler;
import com.itextpdf.layout.minmaxwidth.MinMaxWidth;
import com.itextpdf.layout.minmaxwidth.MinMaxWidthUtils;
import com.itextpdf.layout.properties.BaseDirection;
import com.itextpdf.layout.properties.ContinuousContainer;
import com.itextpdf.layout.properties.FloatPropertyValue;
import com.itextpdf.layout.properties.Leading;
import com.itextpdf.layout.properties.OverflowPropertyValue;
import com.itextpdf.layout.properties.ParagraphOrphansControl;
import com.itextpdf.layout.properties.ParagraphWidowsControl;
import com.itextpdf.layout.properties.Property;
import com.itextpdf.layout.properties.RenderingMode;
import com.itextpdf.layout.properties.TextAlignment;
import com.itextpdf.layout.properties.UnitValue;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This class represents the {@link IRenderer renderer} object for a {@link Paragraph}
 * object. It will draw the glyphs of the textual content on the {@link DrawContext}.
 */
public class ParagraphRenderer extends BlockRenderer {

    protected List lines = null;

    /**
     * Creates a ParagraphRenderer from its corresponding layout object.
     *
     * @param modelElement the {@link com.itextpdf.layout.element.Paragraph} which this object should manage
     */
    public ParagraphRenderer(Paragraph modelElement) {
        super(modelElement);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public LayoutResult layout(LayoutContext layoutContext) {
        ParagraphOrphansControl orphansControl = this.getProperty(Property.ORPHANS_CONTROL);
        ParagraphWidowsControl widowsControl = this.getProperty(Property.WIDOWS_CONTROL);
        if (orphansControl != null || widowsControl != null) {
            return OrphansWidowsLayoutHelper.orphansWidowsAwareLayout(this, layoutContext, orphansControl, widowsControl);
        }
        final LayoutResult layoutResult = directLayout(layoutContext);
        updateParentLines(this);
        updateParentLines((ParagraphRenderer) layoutResult.getSplitRenderer());
        return layoutResult;
    }

    protected LayoutResult directLayout(LayoutContext layoutContext) {
        boolean wasHeightClipped = false;
        boolean wasParentsHeightClipped = layoutContext.isClippedHeight();
        int pageNumber = layoutContext.getArea().getPageNumber();
        boolean anythingPlaced = false;
        boolean firstLineInBox = true;
        LineRenderer currentRenderer = (LineRenderer) new LineRenderer().setParent(this);
        Rectangle parentBBox = layoutContext.getArea().getBBox().clone();

        MarginsCollapseHandler marginsCollapseHandler = null;
        boolean marginsCollapsingEnabled = Boolean.TRUE.equals(getPropertyAsBoolean(Property.COLLAPSING_MARGINS));
        if (marginsCollapsingEnabled) {
            marginsCollapseHandler = new MarginsCollapseHandler(this, layoutContext.getMarginsCollapseInfo());
        }

        ContinuousContainer.setupContinuousContainerIfNeeded(this);

        OverflowPropertyValue overflowX = this.getProperty(Property.OVERFLOW_X);

        Boolean nowrapProp = this.getPropertyAsBoolean(Property.NO_SOFT_WRAP_INLINE);
        currentRenderer.setProperty(Property.NO_SOFT_WRAP_INLINE, nowrapProp);

        boolean notAllKidsAreFloats = false;
        List floatRendererAreas = layoutContext.getFloatRendererAreas();
        FloatPropertyValue floatPropertyValue = this.getProperty(Property.FLOAT);
        float clearHeightCorrection = FloatingHelper.calculateClearHeightCorrection(this, floatRendererAreas,
                parentBBox);
        FloatingHelper.applyClearance(parentBBox, marginsCollapseHandler, clearHeightCorrection,
                FloatingHelper.isRendererFloating(this));
        Float blockWidth = retrieveWidth(parentBBox.getWidth());
        if (FloatingHelper.isRendererFloating(this, floatPropertyValue)) {
            blockWidth = FloatingHelper.adjustFloatedBlockLayoutBox(this, parentBBox, blockWidth, floatRendererAreas,
                    floatPropertyValue, overflowX);
            floatRendererAreas = new ArrayList<>();
        }

        if (0 == childRenderers.size()) {
            anythingPlaced = true;
            currentRenderer = null;
        }

        boolean isPositioned = isPositioned();
        Float rotation = this.getPropertyAsFloat(Property.ROTATION_ANGLE);

        Float blockMaxHeight = retrieveMaxHeight();

        OverflowPropertyValue overflowY = (null == blockMaxHeight || blockMaxHeight > parentBBox.getHeight())
                && !wasParentsHeightClipped
                ? OverflowPropertyValue.FIT
                : this.getProperty(Property.OVERFLOW_Y);

        if (rotation != null || isFixedLayout()) {
            parentBBox.moveDown(AbstractRenderer.INF - parentBBox.getHeight()).setHeight(AbstractRenderer.INF);
        }
        if (rotation != null && !FloatingHelper.isRendererFloating(this)) {
            blockWidth = RotationUtils.retrieveRotatedLayoutWidth(parentBBox.getWidth(), this);
        }

        if (marginsCollapsingEnabled) {
            marginsCollapseHandler.startMarginsCollapse(parentBBox);
        }
        Border[] borders = getBorders();
        UnitValue[] paddings = getPaddings();

        float parentWidth = parentBBox.getWidth();

        applyMargins(parentBBox, false);
        applyBorderBox(parentBBox, borders, false);
        if (isFixedLayout()) {
            parentBBox.setX((float) this.getPropertyAsFloat(Property.LEFT));
        }
        applyPaddings(parentBBox, paddings, false);
        float additionalWidth = parentWidth - parentBBox.getWidth();
        applyWidth(parentBBox, blockWidth, overflowX);
        wasHeightClipped = applyMaxHeight(parentBBox, blockMaxHeight, marginsCollapseHandler, false, wasParentsHeightClipped, overflowY);

        MinMaxWidth minMaxWidth = new MinMaxWidth(additionalWidth);
        AbstractWidthHandler widthHandler = new MaxMaxWidthHandler(minMaxWidth);

        List areas;
        if (isPositioned) {
            areas = Collections.singletonList(parentBBox);
        } else {
            areas = initElementAreas(new LayoutArea(pageNumber, parentBBox));
        }

        occupiedArea = new LayoutArea(pageNumber, new Rectangle(parentBBox.getX(), parentBBox.getY() + parentBBox.getHeight(), parentBBox.getWidth(), 0));
        shrinkOccupiedAreaForAbsolutePosition();

        TargetCounterHandler.addPageByID(this);

        int currentAreaPos = 0;
        Rectangle layoutBox = areas.get(0).clone();
        lines = new ArrayList<>();
        for (IRenderer child : childRenderers) {
            notAllKidsAreFloats = notAllKidsAreFloats || !FloatingHelper.isRendererFloating(child);
            currentRenderer.addChild(child);
        }

        float lastYLine = layoutBox.getY() + layoutBox.getHeight();

        float previousDescent = 0;
        float lastLineBottomLeadingIndent = 0;
        boolean onlyOverflowedFloatsLeft = false;
        List inlineFloatsOverflowedToNextPage = new ArrayList<>();
        boolean floatOverflowedToNextPageWithNothing = false;

        // rectangles are compared by instances
        Set nonChildFloatingRendererAreas = new HashSet<>(floatRendererAreas);

        if (marginsCollapsingEnabled && childRenderers.size() > 0) {
            // passing null is sufficient to notify that there is a kid, however we don't care about it and it's margins
            marginsCollapseHandler.startChildMarginsHandling(null, layoutBox);
        }
        boolean includeFloatsInOccupiedArea = BlockFormattingContextUtil.isRendererCreateBfc(this);

        while (currentRenderer != null) {
            currentRenderer.setProperty(Property.TAB_DEFAULT, this.getPropertyAsFloat(Property.TAB_DEFAULT));
            currentRenderer.setProperty(Property.TAB_STOPS, this.getProperty(Property.TAB_STOPS));

            float lineIndent = anythingPlaced ? 0 : (float) this.getPropertyAsFloat(Property.FIRST_LINE_INDENT);
            Rectangle childLayoutBox = new Rectangle(layoutBox.getX(), layoutBox.getY(), layoutBox.getWidth(), layoutBox.getHeight());
            currentRenderer.setProperty(Property.OVERFLOW_X, overflowX);
            currentRenderer.setProperty(Property.OVERFLOW_Y, overflowY);

            LineLayoutContext lineLayoutContext = new LineLayoutContext(
                    new LayoutArea(pageNumber, childLayoutBox), null, floatRendererAreas, wasHeightClipped || wasParentsHeightClipped)
                    .setTextIndent(lineIndent)
                    .setFloatOverflowedToNextPageWithNothing(floatOverflowedToNextPageWithNothing);
            LineLayoutResult result = (LineLayoutResult)((LineRenderer) currentRenderer.setParent(this)).layout(lineLayoutContext);
            boolean isLastLineReLaidOut = false;

            if (result.getStatus() == LayoutResult.NOTHING) {
                //relayouting the child for allowing the vertical overflow in order to take into account the negative
                // leading adjustment in case of a clipped-height context
                if (layoutContext.isClippedHeight()) {
                    OverflowPropertyValue previousOverflowProperty = currentRenderer.getProperty(
                            Property.OVERFLOW_Y);
                    currentRenderer.setProperty(Property.OVERFLOW_Y, OverflowPropertyValue.VISIBLE);
                    lineLayoutContext.setClippedHeight(true);
                    result = (LineLayoutResult) ((LineRenderer) currentRenderer.setParent(this)).layout(
                            lineLayoutContext);
                    currentRenderer.setProperty(Property.OVERFLOW_Y, previousOverflowProperty);
                    isLastLineReLaidOut = true;
                }

                Float lineShiftUnderFloats = FloatingHelper.calculateLineShiftUnderFloats(floatRendererAreas, layoutBox);
                if (lineShiftUnderFloats != null) {
                    layoutBox.decreaseHeight((float) lineShiftUnderFloats);
                    firstLineInBox = true;
                    continue;
                }

                boolean allRemainingKidsAreFloats = !currentRenderer.childRenderers.isEmpty();
                for (IRenderer renderer : currentRenderer.childRenderers) {
                    allRemainingKidsAreFloats = allRemainingKidsAreFloats && FloatingHelper.isRendererFloating(renderer);
                }
                if (allRemainingKidsAreFloats) {
                    onlyOverflowedFloatsLeft = true;
                }
            }

            floatOverflowedToNextPageWithNothing = lineLayoutContext.isFloatOverflowedToNextPageWithNothing();
            if (result.getFloatsOverflowedToNextPage() != null) {
                inlineFloatsOverflowedToNextPage.addAll(result.getFloatsOverflowedToNextPage());
            }

            float minChildWidth = 0;
            float maxChildWidth = 0;
            if (result instanceof MinMaxWidthLayoutResult) {
                minChildWidth = ((MinMaxWidthLayoutResult)result).getMinMaxWidth().getMinWidth();
                maxChildWidth = ((MinMaxWidthLayoutResult)result).getMinMaxWidth().getMaxWidth();
            }

            widthHandler.updateMinChildWidth(minChildWidth);
            widthHandler.updateMaxChildWidth(maxChildWidth);

            LineRenderer processedRenderer = (LineRenderer) result.getSplitRenderer();
            if (processedRenderer == null && result.getStatus() == LayoutResult.FULL) {
                processedRenderer = currentRenderer;
            }

            if (onlyOverflowedFloatsLeft) {
                // This is done to trick ParagraphRenderer to break rendering and to overflow to the next page.
                // The `onlyOverflowedFloatsLeft` is set to true only when no other content is left except
                // overflowed floating elements.
                processedRenderer = null;
            }

            TextAlignment textAlignment = (TextAlignment) this.getProperty(Property.TEXT_ALIGNMENT, TextAlignment.LEFT);
            applyTextAlignment(textAlignment, result, processedRenderer, layoutBox, floatRendererAreas, onlyOverflowedFloatsLeft, lineIndent);

            Leading leading =
                    RenderingMode.HTML_MODE.equals(this.getProperty(Property.RENDERING_MODE)) ? null
                            : this.getProperty(Property.LEADING);
            // could be false if e.g. line contains only floats
            boolean lineHasContent = processedRenderer != null && processedRenderer.getOccupiedArea().getBBox().getHeight() > 0;
            boolean isFit = processedRenderer != null;
            float deltaY = 0;
            if (isFit && !RenderingMode.HTML_MODE.equals(this.getProperty(Property.RENDERING_MODE))) {
                if (lineHasContent) {
                    float indentFromLastLine = previousDescent - lastLineBottomLeadingIndent - (leading != null ? processedRenderer.getTopLeadingIndent(leading) : 0) - processedRenderer.getMaxAscent();
                    if (processedRenderer.containsImage()) {
                        indentFromLastLine += previousDescent;
                    }
                    deltaY = lastYLine + indentFromLastLine - processedRenderer.getYLine();
                    lastLineBottomLeadingIndent = leading != null ? processedRenderer.getBottomLeadingIndent(leading) : 0;
                    if (lastLineBottomLeadingIndent < 0 && processedRenderer.containsImage()) {
                        lastLineBottomLeadingIndent = 0;
                    }
                }

                // for the first and last line in a paragraph, leading is smaller
                if (firstLineInBox) {
                    deltaY = processedRenderer != null && leading != null ? -processedRenderer.getTopLeadingIndent(leading) : 0;
                }

                if (isLastLineReLaidOut) {
                    isFit = leading == null || processedRenderer.getOccupiedArea().getBBox().getY() + deltaY - lastLineBottomLeadingIndent >= layoutBox.getY();
                } else {
                    isFit = leading == null || processedRenderer.getOccupiedArea().getBBox().getY() + deltaY >= layoutBox.getY();
                }
            }

            if (!isFit && (null == processedRenderer || isOverflowFit(overflowY))) {
                if (currentAreaPos + 1 < areas.size()) {
                    layoutBox = areas.get(++currentAreaPos).clone();
                    lastYLine = layoutBox.getY() + layoutBox.getHeight();
                    firstLineInBox = true;
                } else {
                    boolean keepTogether = isKeepTogether(result.getCauseOfNothing());
                    if (keepTogether) {
                        floatRendererAreas.retainAll(nonChildFloatingRendererAreas);
                        return new MinMaxWidthLayoutResult(LayoutResult.NOTHING, null, null, this, null == result.getCauseOfNothing() ? this : result.getCauseOfNothing());
                    } else {
                        if (marginsCollapsingEnabled) {
                            if (anythingPlaced && notAllKidsAreFloats) {
                                marginsCollapseHandler.endChildMarginsHandling(layoutBox);
                            }
                        }

                        // On page split, if not only overflowed floats left, content will be drawn on next page, i.e. under all floats on this page
                        boolean includeFloatsInOccupiedAreaOnSplit = !onlyOverflowedFloatsLeft || includeFloatsInOccupiedArea;
                        if (includeFloatsInOccupiedAreaOnSplit) {
                            FloatingHelper.includeChildFloatsInOccupiedArea(floatRendererAreas, this, nonChildFloatingRendererAreas);
                            fixOccupiedAreaIfOverflowedX(overflowX, layoutBox);
                        }

                        if (marginsCollapsingEnabled) {
                            marginsCollapseHandler.endMarginsCollapse(layoutBox);
                        }

                        boolean minHeightOverflowed = false;
                        if (!includeFloatsInOccupiedAreaOnSplit) {
                            AbstractRenderer minHeightOverflow = applyMinHeight(overflowY, layoutBox);
                            minHeightOverflowed = minHeightOverflow != null;
                            applyVerticalAlignment();
                        }

                        ParagraphRenderer[] split = split();
                        split[0].lines = lines;
                        for (LineRenderer line : lines) {
                            split[0].childRenderers.addAll(line.getChildRenderers());
                        }
                        split[1].childRenderers.addAll(inlineFloatsOverflowedToNextPage);
                        if (processedRenderer != null) {
                            split[1].childRenderers.addAll(processedRenderer.getChildRenderers());
                        }
                        if (result.getOverflowRenderer() != null) {
                            split[1].childRenderers.addAll(result.getOverflowRenderer().getChildRenderers());
                        }

                        if (onlyOverflowedFloatsLeft && !includeFloatsInOccupiedArea && !minHeightOverflowed) {
                            FloatingHelper.removeParentArtifactsOnPageSplitIfOnlyFloatsOverflow(split[1]);
                        }


                        float usedHeight = occupiedArea.getBBox().getHeight();
                        if (!includeFloatsInOccupiedAreaOnSplit) {
                            Rectangle commonRectangle = Rectangle.getCommonRectangle(layoutBox, occupiedArea.getBBox());
                            usedHeight = commonRectangle.getHeight();
                        }

                        updateHeightsOnSplit(usedHeight, wasHeightClipped, this, split[1], includeFloatsInOccupiedAreaOnSplit);
                        correctFixedLayout(layoutBox);
                        applyPaddings(occupiedArea.getBBox(), paddings, true);
                        applyBorderBox(occupiedArea.getBBox(), borders, true);
                        applyMargins(occupiedArea.getBBox(), true);

                        applyAbsolutePositionIfNeeded(layoutContext);

                        LayoutArea editedArea = FloatingHelper.adjustResultOccupiedAreaForFloatAndClear(this, layoutContext.getFloatRendererAreas(), layoutContext.getArea().getBBox(), clearHeightCorrection, marginsCollapsingEnabled);
                        if (wasHeightClipped) {
                            return new MinMaxWidthLayoutResult(LayoutResult.FULL, editedArea, split[0], null).setMinMaxWidth(minMaxWidth);
                        } else if (anythingPlaced) {
                            return new MinMaxWidthLayoutResult(LayoutResult.PARTIAL, editedArea, split[0], split[1]).setMinMaxWidth(minMaxWidth);
                        } else {
                            if (Boolean.TRUE.equals(getPropertyAsBoolean(Property.FORCED_PLACEMENT))) {
                                occupiedArea.setBBox(Rectangle.getCommonRectangle(occupiedArea.getBBox(), currentRenderer.getOccupiedArea().getBBox()));
                                fixOccupiedAreaIfOverflowedX(overflowX, layoutBox);
                                parent.setProperty(Property.FULL, true);
                                lines.add(currentRenderer);
                                // Force placement of children we have and do not force placement of the others
                                if (LayoutResult.PARTIAL == result.getStatus()) {
                                    IRenderer childNotRendered = result.getCauseOfNothing();
                                    int firstNotRendered = currentRenderer.childRenderers.indexOf(childNotRendered);
                                    currentRenderer.childRenderers.retainAll(currentRenderer.childRenderers.subList(0, firstNotRendered));
                                    // as we ignore split result here and use current line - we should update parents
                                    for (final IRenderer child : currentRenderer.getChildRenderers()) {
                                        child.setParent(currentRenderer);
                                    }
                                    split[1].childRenderers.removeAll(split[1].childRenderers.subList(0, firstNotRendered));
                                    return new MinMaxWidthLayoutResult(LayoutResult.PARTIAL, editedArea, this, split[1], null).setMinMaxWidth(minMaxWidth);
                                } else {
                                    return new MinMaxWidthLayoutResult(LayoutResult.FULL, editedArea, null, null, this).setMinMaxWidth(minMaxWidth);
                                }
                            } else {
                                floatRendererAreas.retainAll(nonChildFloatingRendererAreas);
                                return new MinMaxWidthLayoutResult(LayoutResult.NOTHING, null, null, this, null == result.getCauseOfNothing() ? this : result.getCauseOfNothing());
                            }
                        }
                    }
                }
            } else {
                if (leading != null) {
                    processedRenderer.applyLeading(deltaY);
                    if (lineHasContent) {
                        lastYLine = processedRenderer.getYLine();
                    }
                }
                if (lineHasContent) {
                    occupiedArea.setBBox(Rectangle.getCommonRectangle(occupiedArea.getBBox(), processedRenderer.getOccupiedArea().getBBox()));
                    fixOccupiedAreaIfOverflowedX(overflowX, layoutBox);
                }
                firstLineInBox = false;

                layoutBox.setHeight(processedRenderer.getOccupiedArea().getBBox().getY() - layoutBox.getY());
                lines.add(processedRenderer);

                anythingPlaced = true;

                currentRenderer = (LineRenderer) result.getOverflowRenderer();
                previousDescent = processedRenderer.getMaxDescent();

                if (!inlineFloatsOverflowedToNextPage.isEmpty() && result.getOverflowRenderer() == null) {
                    onlyOverflowedFloatsLeft = true;

                    // dummy renderer to trick paragraph renderer to continue kids loop
                    currentRenderer = new LineRenderer();
                }
            }
        }
        if (!RenderingMode.HTML_MODE.equals(this.getProperty(Property.RENDERING_MODE))) {
            float moveDown = lastLineBottomLeadingIndent;
            if (isOverflowFit(overflowY) && moveDown > occupiedArea.getBBox().getY() - layoutBox.getY()) {
                moveDown = occupiedArea.getBBox().getY() - layoutBox.getY();
            }
            occupiedArea.getBBox().moveDown(moveDown);
            occupiedArea.getBBox().setHeight(occupiedArea.getBBox().getHeight() + moveDown);
        }

        if (marginsCollapsingEnabled) {
            if (childRenderers.size() > 0 && notAllKidsAreFloats) {
                marginsCollapseHandler.endChildMarginsHandling(layoutBox);
            }
        }

        if (includeFloatsInOccupiedArea) {
            FloatingHelper.includeChildFloatsInOccupiedArea(floatRendererAreas, this, nonChildFloatingRendererAreas);
            fixOccupiedAreaIfOverflowedX(overflowX, layoutBox);
        }

        if (wasHeightClipped) {
            fixOccupiedAreaIfOverflowedY(overflowY, layoutBox);
        }

        if (marginsCollapsingEnabled) {
            marginsCollapseHandler.endMarginsCollapse(layoutBox);
        }

        AbstractRenderer overflowRenderer = applyMinHeight(overflowY, layoutBox);

        if (overflowRenderer != null && isKeepTogether()) {
            floatRendererAreas.retainAll(nonChildFloatingRendererAreas);
            return new LayoutResult(LayoutResult.NOTHING, null, null, this, this);
        }
        final ContinuousContainer continuousContainer = this.getProperty(
                Property.TREAT_AS_CONTINUOUS_CONTAINER_RESULT);
        if (continuousContainer != null && overflowRenderer == null) {
            continuousContainer.reApplyProperties(this);
            paddings = getPaddings();
            borders = getBorders();
        }

        correctFixedLayout(layoutBox);

        applyPaddings(occupiedArea.getBBox(), paddings, true);
        applyBorderBox(occupiedArea.getBBox(), borders, true);
        applyMargins(occupiedArea.getBBox(), true);

        applyAbsolutePositionIfNeeded(layoutContext);

        if (rotation != null) {
            applyRotationLayout(layoutContext.getArea().getBBox().clone());
            if (isNotFittingLayoutArea(layoutContext.getArea())) {
                if (isNotFittingWidth(layoutContext.getArea()) && !isNotFittingHeight(layoutContext.getArea())) {
                    LoggerFactory.getLogger(getClass())
                            .warn(MessageFormatUtil.format(LayoutLogMessageConstant.ELEMENT_DOES_NOT_FIT_AREA,
                                    "It fits by height so it will be forced placed"));
                } else if (!Boolean.TRUE.equals(getPropertyAsBoolean(Property.FORCED_PLACEMENT))) {
                    floatRendererAreas.retainAll(nonChildFloatingRendererAreas);
                    return new MinMaxWidthLayoutResult(LayoutResult.NOTHING, null, null, this, this);
                }
            }
        }

        applyVerticalAlignment();

        FloatingHelper.removeFloatsAboveRendererBottom(floatRendererAreas, this);
        LayoutArea editedArea = FloatingHelper.adjustResultOccupiedAreaForFloatAndClear(this,
                layoutContext.getFloatRendererAreas(), layoutContext.getArea().getBBox(), clearHeightCorrection,
                marginsCollapsingEnabled);

        ContinuousContainer.clearPropertiesFromOverFlowRenderer(overflowRenderer);
        if (null == overflowRenderer) {
            return new MinMaxWidthLayoutResult(LayoutResult.FULL, editedArea, null, null, null).setMinMaxWidth(
                    minMaxWidth);
        } else {
            return new MinMaxWidthLayoutResult(LayoutResult.PARTIAL, editedArea, this, overflowRenderer,
                    null).setMinMaxWidth(minMaxWidth);
        }
    }

    /**
     * Gets a new instance of this class to be used as a next renderer, after this renderer is used, if
     * {@link #layout(LayoutContext)} is called more than once.
     *
     * 

     * If a renderer overflows to the next area, iText uses this method to create a renderer
     * for the overflow part. So if one wants to extend {@link ParagraphRenderer}, one should override
     * this method: otherwise the default method will be used and thus the default rather than the custom
     * renderer will be created.
     * @return new renderer instance
     */
    @Override
    public IRenderer getNextRenderer() {
        logWarningIfGetNextRendererNotOverridden(ParagraphRenderer.class, this.getClass());
        return new ParagraphRenderer((Paragraph) modelElement);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public  T1 getDefaultProperty(int property) {
        if ((property == Property.MARGIN_TOP || property == Property.MARGIN_BOTTOM) && parent instanceof CellRenderer) {
            return (T1) (Object) UnitValue.createPointValue(0f);
        }
        return super.getDefaultProperty(property);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        if (lines != null && lines.size() > 0) {
            for (int i = 0; i < lines.size(); i++) {
                if (i > 0) {
                    sb.append("\n");
                }
                sb.append(lines.get(i).toString());
            }
        } else {
            for (IRenderer renderer : childRenderers) {
                sb.append(renderer.toString());
            }
        }
        return sb.toString();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void drawChildren(DrawContext drawContext) {
        if (lines != null) {
            for (LineRenderer line : lines) {
                line.draw(drawContext);
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void move(float dxRight, float dyUp) {
        Logger logger = LoggerFactory.getLogger(ParagraphRenderer.class);
        if (occupiedArea == null) {
            logger.error(MessageFormatUtil.format(IoLogMessageConstant.OCCUPIED_AREA_HAS_NOT_BEEN_INITIALIZED,
                    "Moving won't be performed."));
            return;
        }
        occupiedArea.getBBox().moveRight(dxRight);
        occupiedArea.getBBox().moveUp(dyUp);
        if (null != lines) {
            for (LineRenderer line : lines) {
                line.move(dxRight, dyUp);
            }
        }
    }

    /**
     * Gets the lines which are the result of the {@link #layout(LayoutContext)}.
     * @return paragraph lines, or null if layout hasn't been called yet
     */
    public List getLines() {
        return lines;
    }

    @Override
    protected Float getFirstYLineRecursively() {
        if (lines == null || lines.size() == 0) {
            return null;
        }
        return lines.get(0).getFirstYLineRecursively();
    }

    @Override
    protected Float getLastYLineRecursively() {
        if (!allowLastYLineRecursiveExtraction()) {
            return null;
        }
        if (lines == null || lines.size() == 0) {
            return null;
        }
        for (int i = lines.size() - 1; i >= 0; i--) {
            Float yLine = lines.get(i).getLastYLineRecursively();
            if (yLine != null) {
                return yLine;
            }
        }
        return null;
    }

    private ParagraphRenderer createOverflowRenderer() {
        return (ParagraphRenderer) getNextRenderer();
    }

    private ParagraphRenderer createSplitRenderer() {
        return (ParagraphRenderer) getNextRenderer();
    }

    protected ParagraphRenderer createOverflowRenderer(IRenderer parent) {
        ParagraphRenderer overflowRenderer = createOverflowRenderer();
        overflowRenderer.parent = parent;
        fixOverflowRenderer(overflowRenderer);
        overflowRenderer.addAllProperties(getOwnProperties());
        ContinuousContainer.clearPropertiesFromOverFlowRenderer(overflowRenderer);
        return overflowRenderer;
    }

    protected ParagraphRenderer createSplitRenderer(IRenderer parent) {
        ParagraphRenderer splitRenderer = createSplitRenderer();
        splitRenderer.parent = parent;
        splitRenderer.addAllProperties(getOwnProperties());
        return splitRenderer;
    }

    @Override
    protected AbstractRenderer createOverflowRenderer(int layoutResult) {
        return createOverflowRenderer(parent);
    }


    @Override
    public MinMaxWidth getMinMaxWidth() {
        MinMaxWidth minMaxWidth = new MinMaxWidth();
        Float rotation = this.getPropertyAsFloat(Property.ROTATION_ANGLE);
        if (!setMinMaxWidthBasedOnFixedWidth(minMaxWidth)) {
            Float minWidth = hasAbsoluteUnitValue(Property.MIN_WIDTH) ? retrieveMinWidth(0) : null;
            Float maxWidth = hasAbsoluteUnitValue(Property.MAX_WIDTH) ? retrieveMaxWidth(0) : null;
            if (minWidth == null || maxWidth == null) {
                boolean restoreRotation = hasOwnProperty(Property.ROTATION_ANGLE);
                setProperty(Property.ROTATION_ANGLE, null);
                MinMaxWidthLayoutResult result = (MinMaxWidthLayoutResult) layout(new LayoutContext(new LayoutArea(1, new Rectangle(MinMaxWidthUtils.getInfWidth(), AbstractRenderer.INF))));
                if (restoreRotation) {
                    setProperty(Property.ROTATION_ANGLE, rotation);
                } else {
                    deleteOwnProperty(Property.ROTATION_ANGLE);
                }
                minMaxWidth = result.getMinMaxWidth();
            }
            if (minWidth != null) {
                minMaxWidth.setChildrenMinWidth((float) minWidth);
            }
            if (maxWidth != null) {
                minMaxWidth.setChildrenMaxWidth((float) maxWidth);
            }
            if (minMaxWidth.getChildrenMinWidth() > minMaxWidth.getChildrenMaxWidth()) {
                minMaxWidth.setChildrenMaxWidth(minMaxWidth.getChildrenMaxWidth());
            }
        } else {
            minMaxWidth.setAdditionalWidth(calculateAdditionalWidth(this));
        }

        return rotation != null ? RotationUtils.countRotationMinMaxWidth(minMaxWidth, this) : minMaxWidth;
    }

    protected ParagraphRenderer[] split() {
        ParagraphRenderer splitRenderer = createSplitRenderer(parent);
        splitRenderer.occupiedArea = occupiedArea;
        splitRenderer.isLastRendererForModelElement = false;

        ParagraphRenderer overflowRenderer = createOverflowRenderer(parent);

        return new ParagraphRenderer[] {splitRenderer, overflowRenderer};
    }

    private void fixOverflowRenderer(ParagraphRenderer overflowRenderer) {
        // Reset first line indent in case of overflow.
        float firstLineIndent = (float) overflowRenderer.getPropertyAsFloat(Property.FIRST_LINE_INDENT);
        if (firstLineIndent != 0) {
            overflowRenderer.setProperty(Property.FIRST_LINE_INDENT, 0f);
        }
    }

    private void alignStaticKids(LineRenderer renderer, float dxRight) {
        renderer.getOccupiedArea().getBBox().moveRight(dxRight);
        for (IRenderer childRenderer : renderer.getChildRenderers()) {
            if (FloatingHelper.isRendererFloating(childRenderer)) {
                continue;
            }
            childRenderer.move(dxRight, 0);
        }
    }

    private void applyTextAlignment(TextAlignment textAlignment, LineLayoutResult result, LineRenderer processedRenderer,
            Rectangle layoutBox, List floatRendererAreas, boolean onlyOverflowedFloatsLeft, float lineIndent) {
        if (textAlignment == TextAlignment.JUSTIFIED && result.getStatus() == LayoutResult.PARTIAL && !result.isSplitForcedByNewline() && !onlyOverflowedFloatsLeft ||
                textAlignment == TextAlignment.JUSTIFIED_ALL) {
            if (processedRenderer != null) {
                Rectangle actualLineLayoutBox = layoutBox.clone();
                FloatingHelper.adjustLineAreaAccordingToFloats(floatRendererAreas, actualLineLayoutBox);
                processedRenderer.justify(actualLineLayoutBox.getWidth() - lineIndent);
            }
        } else if (textAlignment != TextAlignment.LEFT && processedRenderer != null) {
            Rectangle actualLineLayoutBox = layoutBox.clone();
            FloatingHelper.adjustLineAreaAccordingToFloats(floatRendererAreas, actualLineLayoutBox);
            float deltaX = Math.max(0, actualLineLayoutBox.getWidth() - lineIndent - processedRenderer.getOccupiedArea().getBBox().getWidth());
            switch (textAlignment) {
                case RIGHT:
                    alignStaticKids(processedRenderer, deltaX);
                    break;
                case CENTER:
                    alignStaticKids(processedRenderer, deltaX / 2);
                    break;
                case JUSTIFIED:
                    if (BaseDirection.RIGHT_TO_LEFT.equals(this.getProperty(Property.BASE_DIRECTION))) {
                        alignStaticKids(processedRenderer, deltaX);
                    }
                    break;
            }
        }
    }

    private static void updateParentLines(ParagraphRenderer re) {
        if (re == null) {
            return;
        }
        for (final LineRenderer lineRenderer : re.lines) {
            lineRenderer.setParent(re);
        }
        for (final IRenderer childRenderer : re.getChildRenderers()) {
            final IRenderer line = childRenderer.getParent();
            if (!(line instanceof LineRenderer && re.lines.contains((LineRenderer) line))) {
                childRenderer.setParent(null);
            }
        }
    }
}
    

    

    

            

    

            



    
    






    
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