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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.fo.flow.table;
-
- import org.apache.fop.fo.properties.CommonBorderPaddingBackground;
- import org.apache.fop.fo.properties.CommonBorderPaddingBackground.BorderInfo;
- import org.apache.fop.layoutmgr.table.CollapsingBorderModel;
-
- /**
- * This class represents one grid unit inside a table.
- */
- public class GridUnit {
-
- /**
- * Indicates that the grid unit is in the first row of the table part (header, footer,
- * body).
- */
- public static final int FIRST_IN_PART = 0;
-
- /**
- * Indicates that the grid unit is in the last row of the table part (header, footer,
- * body).
- */
- public static final int LAST_IN_PART = 1;
-
- /** Indicates that the primary grid unit has a pending keep-with-next. */
- public static final int KEEP_WITH_NEXT_PENDING = 2;
-
- /** Indicates that the primary grid unit has a pending keep-with-previous. */
- public static final int KEEP_WITH_PREVIOUS_PENDING = 3;
-
- /** Primary grid unit */
- private PrimaryGridUnit primary;
-
- /** Table cell which occupies this grid unit */
- protected TableCell cell;
-
- /** Table row occupied by this grid unit (may be null). */
- private TableRow row;
-
- /** index of grid unit within cell in column direction */
- private int colSpanIndex;
-
- /** index of grid unit within cell in row direction */
- private int rowSpanIndex;
-
- /** flags for the grid unit */
- private byte flags = 0;
-
- /** the border-before specification */
- ConditionalBorder borderBefore;
- /** the border-after specification */
- ConditionalBorder borderAfter;
- /** the border-start specification */
- BorderSpecification borderStart;
- /** the border-end specification */
- BorderSpecification borderEnd;
-
- /** The border model helper associated with the table */
- protected CollapsingBorderModel collapsingBorderModel;
-
- /**
- * Creates a new grid unit.
- *
- * @param table the containing table
- * @param colSpanIndex index of this grid unit in the span, in column direction
- * @param rowSpanIndex index of this grid unit in the span, in row direction
- */
- protected GridUnit(Table table, int colSpanIndex, int rowSpanIndex) {
- this(colSpanIndex, rowSpanIndex);
- setBorders(table);
- }
-
- /**
- * Creates a new grid unit.
- *
- * @param cell table cell which occupies this grid unit
- * @param colSpanIndex index of this grid unit in the span, in column direction
- * @param rowSpanIndex index of this grid unit in the span, in row direction
- */
- protected GridUnit(TableCell cell, int colSpanIndex, int rowSpanIndex) {
- this(colSpanIndex, rowSpanIndex);
- this.cell = cell;
- setBorders(cell.getTable());
- }
-
- /**
- * Creates a new grid unit.
- *
- * @param primary the before-start grid unit of the cell containing this grid unit
- * @param colSpanIndex index of this grid unit in the span, in column direction
- * @param rowSpanIndex index of this grid unit in the span, in row direction
- */
- GridUnit(PrimaryGridUnit primary, int colSpanIndex, int rowSpanIndex) {
- this(primary.getCell(), colSpanIndex, rowSpanIndex);
- this.primary = primary;
- }
-
- private GridUnit(int colSpanIndex, int rowSpanIndex) {
- this.colSpanIndex = colSpanIndex;
- this.rowSpanIndex = rowSpanIndex;
- }
-
- private void setBorders(Table table/*TODO*/) {
- if (!table.isSeparateBorderModel()) {
- collapsingBorderModel = CollapsingBorderModel.getBorderModelFor(table
- .getBorderCollapse());
- setBordersFromCell();
- }
- }
-
- /**
- * Prepares the borders of this grid unit for upcoming resolution, in the collapsing
- * model.
- */
- protected void setBordersFromCell() {
- borderBefore = cell.borderBefore.copy();
- if (rowSpanIndex > 0) {
- borderBefore.normal = BorderSpecification.getDefaultBorder();
- }
- borderAfter = cell.borderAfter.copy();
- if (!isLastGridUnitRowSpan()) {
- borderAfter.normal = BorderSpecification.getDefaultBorder();
- }
- if (colSpanIndex == 0) {
- borderStart = cell.borderStart;
- } else {
- borderStart = BorderSpecification.getDefaultBorder();
- }
- if (isLastGridUnitColSpan()) {
- borderEnd = cell.borderEnd;
- } else {
- borderEnd = BorderSpecification.getDefaultBorder();
- }
- }
-
- /**
- * Returns the table cell associated with this grid unit.
- * @return the table cell
- */
- public TableCell getCell() {
- return cell;
- }
-
- /**
- * Returns the fo:table-row element (if any) this grid unit belongs to.
- *
- * @return the row containing this grid unit, or null if there is no fo:table-row
- * element in the corresponding table-part
- */
- public TableRow getRow() {
- return row;
- }
-
- void setRow(TableRow row) {
- this.row = row;
- }
-
- /**
- * Returns the before-start grid unit of the cell containing this grid unit.
- *
- * @return the before-start grid unit of the cell containing this grid unit.
- */
- public PrimaryGridUnit getPrimary() {
- return primary;
- }
-
- /**
- * Is this grid unit the before-start grid unit of the cell?
- *
- * @return true if this grid unit is the before-start grid unit of the cell
- */
- public boolean isPrimary() {
- return false;
- }
-
- /**
- * Does this grid unit belong to an empty cell?
- *
- * @return true if this grid unit belongs to an empty cell
- */
- public boolean isEmpty() {
- return cell == null;
- }
-
- /** @return true if the grid unit is the last in column spanning direction */
- public boolean isLastGridUnitColSpan() {
- return (colSpanIndex == cell.getNumberColumnsSpanned() - 1);
- }
-
- /** @return true if the grid unit is the last in row spanning direction */
- public boolean isLastGridUnitRowSpan() {
- return (rowSpanIndex == cell.getNumberRowsSpanned() - 1);
- }
-
- /**
- * @return the index of the grid unit inside a cell in row direction
- */
- public int getRowSpanIndex() {
- return rowSpanIndex;
- }
-
- /**
- * @return the index of the grid unit inside a cell in column direction
- */
- public int getColSpanIndex() {
- return colSpanIndex;
- }
-
- /**
- * Returns the resolved border-before of this grid unit, in the collapsing-border
- * model.
- *
- * @param which one of {@link ConditionalBorder#NORMAL},
- * {@link ConditionalBorder#LEADING_TRAILING} or {@link ConditionalBorder#REST}
- * @return the corresponding border
- */
- public BorderInfo getBorderBefore(int which) {
- switch (which) {
- case ConditionalBorder.NORMAL:
- return borderBefore.normal.getBorderInfo();
- case ConditionalBorder.LEADING_TRAILING:
- return borderBefore.leadingTrailing.getBorderInfo();
- case ConditionalBorder.REST:
- return borderBefore.rest.getBorderInfo();
- default:
- assert false;
- return null;
- }
- }
-
- /**
- * Returns the resolved border-after of this grid unit, in the collapsing-border
- * model.
- *
- * @param which one of {@link ConditionalBorder#NORMAL},
- * {@link ConditionalBorder#LEADING_TRAILING} or {@link ConditionalBorder#REST}
- * @return the corresponding border
- */
- public BorderInfo getBorderAfter(int which) {
- switch (which) {
- case ConditionalBorder.NORMAL:
- return borderAfter.normal.getBorderInfo();
- case ConditionalBorder.LEADING_TRAILING:
- return borderAfter.leadingTrailing.getBorderInfo();
- case ConditionalBorder.REST:
- return borderAfter.rest.getBorderInfo();
- default:
- assert false;
- return null;
- }
- }
-
- /**
- * Returns the resolved border-start of this grid unit, in the collapsing-border
- * model.
- *
- * @return the corresponding border
- */
- public BorderInfo getBorderStart() {
- return borderStart.getBorderInfo();
- }
-
- /**
- * Returns the resolved border-end of this grid unit, in the collapsing-border
- * model.
- *
- * @return the corresponding border
- */
- public BorderInfo getBorderEnd() {
- return borderEnd.getBorderInfo();
- }
-
- /**
- * Resolve collapsing borders for the given cell. Used in case of the collapsing
- * border model.
- *
- * @param other neighbouring grid unit
- * @param side the side to resolve (one of
- * CommonBorderPaddingBackground.BEFORE|AFTER|START|END)
- */
- void resolveBorder(GridUnit other, int side) {
- switch (side) {
- case CommonBorderPaddingBackground.BEFORE:
- borderBefore.resolve(other.borderAfter, true, false, false);
- break;
- case CommonBorderPaddingBackground.AFTER:
- borderAfter.resolve(other.borderBefore, true, false, false);
- break;
- case CommonBorderPaddingBackground.START:
- BorderSpecification resolvedBorder = collapsingBorderModel.determineWinner(
- borderStart, other.borderEnd);
- if (resolvedBorder != null) {
- this.borderStart = resolvedBorder;
- other.borderEnd = resolvedBorder;
- }
- break;
- case CommonBorderPaddingBackground.END:
- resolvedBorder = collapsingBorderModel.determineWinner(
- borderEnd, other.borderStart);
- if (resolvedBorder != null) {
- this.borderEnd = resolvedBorder;
- other.borderStart = resolvedBorder;
- }
- break;
- default: assert false;
- }
- }
-
- /**
- * For the given side, integrates in the conflict resolution the border segment of the
- * given parent element.
- *
- * @param side the side to consider (either CommonBorderPaddingBackground.BEFORE or
- * AFTER)
- * @param parent a table element whose corresponding border coincides on the given
- * side
- */
- void integrateBorderSegment(int side, TableFObj parent, boolean withNormal,
- boolean withLeadingTrailing, boolean withRest) {
- switch (side) {
- case CommonBorderPaddingBackground.BEFORE:
- borderBefore.integrateSegment(parent.borderBefore, withNormal,
- withLeadingTrailing, withRest);
- break;
- case CommonBorderPaddingBackground.AFTER:
- borderAfter.integrateSegment(parent.borderAfter, withNormal,
- withLeadingTrailing, withRest);
- break;
- default: assert false;
- }
- }
-
- /**
- * For the given side, integrates in the conflict resolution the border segment of the
- * given parent element.
- *
- * @param side the side to consider (one of
- * CommonBorderPaddingBackground.BEFORE|AFTER|START|END)
- * @param parent a table element whose corresponding border coincides on the given side
- */
- void integrateBorderSegment(int side, TableFObj parent) {
- switch (side) {
- case CommonBorderPaddingBackground.BEFORE:
- case CommonBorderPaddingBackground.AFTER:
- integrateBorderSegment(side, parent, true, true, true);
- break;
- case CommonBorderPaddingBackground.START:
- borderStart = collapsingBorderModel.determineWinner(borderStart,
- parent.borderStart);
- break;
- case CommonBorderPaddingBackground.END:
- borderEnd = collapsingBorderModel.determineWinner(borderEnd,
- parent.borderEnd);
- break;
- default: assert false;
- }
- }
-
- /**
- * For the given side, integrates in the conflict resolution the given border segment.
- *
- * @param side the side to consider (one of CommonBorderPaddingBackground.START|END)
- * @param segment a border specification to integrate at the given side
- */
- void integrateBorderSegment(int side, BorderSpecification segment) {
- switch(side) {
- case CommonBorderPaddingBackground.START:
- borderStart = collapsingBorderModel.determineWinner(borderStart, segment);
- break;
- case CommonBorderPaddingBackground.END:
- borderEnd = collapsingBorderModel.determineWinner(borderEnd, segment);
- break;
- default: assert false;
- }
- }
-
- void integrateCompetingBorder(int side, ConditionalBorder competitor,
- boolean withNormal, boolean withLeadingTrailing, boolean withRest) {
- switch (side) {
- case CommonBorderPaddingBackground.BEFORE:
- borderBefore.integrateCompetingSegment(competitor, withNormal,
- withLeadingTrailing, withRest);
- break;
- case CommonBorderPaddingBackground.AFTER:
- borderAfter.integrateCompetingSegment(competitor, withNormal,
- withLeadingTrailing, withRest);
- break;
- default: assert false;
- }
- }
-
- /**
- * Returns a flag for this GridUnit.
- *
- * @param which the requested flag
- * @return the value of the flag
- */
- public boolean getFlag(int which) {
- return (flags & (1 << which)) != 0;
- }
-
- /**
- * Sets a flag on a GridUnit.
- *
- * @param which the flag to set
- * @param value the new value for the flag
- */
- public void setFlag(int which, boolean value) {
- if (value) {
- flags |= (1 << which); // set flag
- } else {
- flags &= ~(1 << which); // clear flag
- }
- }
-
- /**
- * Sets the given flag on this grid unit.
- *
- * @param which the flag to set
- */
- public void setFlag(int which) {
- setFlag(which, true);
- }
-
- /** {@inheritDoc} */
- public String toString() {
- StringBuffer buffer = new StringBuffer();
- if (isEmpty()) {
- buffer.append("EMPTY");
- } else if (isPrimary()) {
- buffer.append("Primary");
- }
- buffer.append("GridUnit:");
- if (colSpanIndex > 0) {
- buffer.append(" colSpan=").append(colSpanIndex);
- if (isLastGridUnitColSpan()) {
- buffer.append("(last)");
- }
- }
- if (rowSpanIndex > 0) {
- buffer.append(" rowSpan=").append(rowSpanIndex);
- if (isLastGridUnitRowSpan()) {
- buffer.append("(last)");
- }
- }
- if (!isPrimary() && getPrimary() != null) {
- buffer.append(" primary=").append(getPrimary().getRowIndex());
- buffer.append("/").append(getPrimary().getColIndex());
- if (getPrimary().getCell() != null) {
- buffer.append(" id=" + getPrimary().getCell().getId());
- }
- }
- buffer.append(" flags=").append(Integer.toBinaryString(flags));
- return buffer.toString();
- }
-
- }
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