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Library for creating nicely layouted PDF documents based on PDFBox
/*
* Copyright (C) 2014-2024 Philip Helger (www.helger.com)
* philip[at]helger[dot]com
*
* Licensed 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.
*/
package com.helger.pdflayout.element.table;
import java.io.IOException;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.ObjIntConsumer;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.OverridingMethodsMustInvokeSuper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.helger.commons.ValueEnforcer;
import com.helger.commons.annotation.DevelopersNote;
import com.helger.commons.annotation.Nonempty;
import com.helger.commons.annotation.ReturnsMutableCopy;
import com.helger.commons.collection.impl.CommonsArrayList;
import com.helger.commons.collection.impl.ICommonsList;
import com.helger.commons.state.EChange;
import com.helger.commons.string.ToStringGenerator;
import com.helger.pdflayout.base.AbstractPLRenderableObject;
import com.helger.pdflayout.base.IPLHasMargin;
import com.helger.pdflayout.base.IPLSplittableObject;
import com.helger.pdflayout.base.IPLVisitor;
import com.helger.pdflayout.base.PLElementWithSize;
import com.helger.pdflayout.base.PLSplitResult;
import com.helger.pdflayout.debug.PLDebugLog;
import com.helger.pdflayout.element.special.PLSpacerX;
import com.helger.pdflayout.element.vbox.PLVBox;
import com.helger.pdflayout.element.vbox.PLVBoxRow;
import com.helger.pdflayout.render.PageRenderContext;
import com.helger.pdflayout.render.PreparationContext;
import com.helger.pdflayout.spec.EValueUOMType;
import com.helger.pdflayout.spec.HeightSpec;
import com.helger.pdflayout.spec.MarginSpec;
import com.helger.pdflayout.spec.SizeSpec;
import com.helger.pdflayout.spec.WidthSpec;
/**
* A special table with a repeating header
*
* @author Philip Helger
*/
public class PLTable extends AbstractPLRenderableObject implements IPLSplittableObject , IPLHasMargin
{
private static final Logger LOGGER = LoggerFactory.getLogger (PLTable.class);
// All column widths
private final ICommonsList m_aWidths;
// With type to use - may be null
private final EValueUOMType m_eCommonWidthType;
// VBox with all the PLTableRow elements
private PLVBox m_aRows = new PLVBox ().setVertSplittable (true).setFullWidth (true);
// Margin around the table
private MarginSpec m_aMargin = DEFAULT_MARGIN;
/**
* Don't use that constructor. Use {@link #PLTable(Iterable)} or
* {@link #PLTable(WidthSpec...)}!!!
*/
@Deprecated
@DevelopersNote ("This ctor is only present to indicate if the varargs ctor would be used without parameters")
public PLTable ()
{
this (new CommonsArrayList <> ());
}
/**
* @param aWidths
* Must all be of the same type! "auto" width is not allowed - only
* "star" may be used.
*/
public PLTable (@Nonnull @Nonempty final WidthSpec... aWidths)
{
this (new CommonsArrayList <> (aWidths));
}
/**
* @param aWidths
* Must all be of the same type! "auto" width is not allowed - only
* "star" may be used.
*/
public PLTable (@Nonnull @Nonempty final Iterable aWidths)
{
ValueEnforcer.notEmptyNoNullValue (aWidths, "Widths");
// Check if all width are of the same type
EValueUOMType eWidthType = null;
boolean bDifferentWidthTypes = false;
for (final WidthSpec aWidth : aWidths)
{
final EValueUOMType eCurWidth = aWidth.getType ();
if (eCurWidth == EValueUOMType.AUTO)
throw new IllegalArgumentException ("Width type auto is not allowed for tables! Use type star instead!");
if (eWidthType == null)
eWidthType = eCurWidth;
else
if (eCurWidth != eWidthType)
{
if (true)
{
// This means, colspan cannot be used
bDifferentWidthTypes = true;
}
else
throw new IllegalArgumentException ("All widths must be of the same type! Found " + eWidthType + " and " + eCurWidth);
}
}
m_aWidths = new CommonsArrayList <> (aWidths);
m_eCommonWidthType = bDifferentWidthTypes ? null : eWidthType;
}
@Override
@OverridingMethodsMustInvokeSuper
protected void onAfterSetID ()
{
// Also change the derived ID
m_aRows.setID (getID () + "-vbox");
}
@Override
@Nonnull
@OverridingMethodsMustInvokeSuper
public PLTable setBasicDataFrom (@Nonnull final PLTable aSource)
{
super.setBasicDataFrom (aSource);
m_aRows.setBasicDataFrom (aSource.m_aRows);
setMargin (aSource.m_aMargin);
return this;
}
@Nonnull
public final MarginSpec getMargin ()
{
return m_aMargin;
}
@Nonnull
public final PLTable setMargin (@Nonnull final MarginSpec aMargin)
{
ValueEnforcer.notNull (aMargin, "Mergin");
m_aMargin = aMargin;
return this;
}
/**
* @return A copy of the list with all widths as specified in the constructor.
* Neither null nor empty.
*/
@Nonnull
@Nonempty
@ReturnsMutableCopy
public ICommonsList getAllWidths ()
{
return m_aWidths.getClone ();
}
/**
* @return The number of columns in the table. Always ≥ 0.
*/
@Nonnegative
public int getColumnCount ()
{
return m_aWidths.size ();
}
@Nonnull
public PLTable setHeaderRowCount (@Nonnegative final int nHeaderRowCount)
{
m_aRows.setHeaderRowCount (nHeaderRowCount);
return this;
}
@Nonnegative
public int getHeaderRowCount ()
{
return m_aRows.getHeaderRowCount ();
}
@Nonnull
public PLTableRow addAndReturnRow (@Nonnull final PLTableCell... aCells)
{
return addAndReturnRow (new CommonsArrayList <> (aCells), m_aRows.getDefaultHeight ());
}
/**
* Add a new table row with auto height. All contained elements are added with
* the specified width in the constructor. null elements are
* represented as empty cells.
*
* @param aCells
* The cells to add. May not be null.
* @return the added table row and never null.
*/
@Nonnull
public PLTableRow addAndReturnRow (@Nonnull final Iterable aCells)
{
return addAndReturnRow (aCells, m_aRows.getDefaultHeight ());
}
/**
* Add a new table row. All contained elements are added with the specified
* width in the constructor. null elements are represented as
* empty cells.
*
* @param aCells
* The cells to add. May not be null but may contain
* null values.
* @param aHeight
* Row height to be used. May not be null.
* @return the added table row and never null.
*/
@Nonnull
public PLTableRow addAndReturnRow (@Nonnull final Iterable aCells, @Nonnull final HeightSpec aHeight)
{
ValueEnforcer.notNull (aCells, "Cells");
// Small consistency check
{
int nUsedCols = 0;
for (final PLTableCell aCell : aCells)
if (aCell == null)
nUsedCols++;
else
nUsedCols += aCell.getColSpan ();
if (nUsedCols > m_aWidths.size ())
throw new IllegalArgumentException ("More cells in row (" + nUsedCols + ") than defined in the table (" + m_aWidths.size () + ")!");
}
final PLTableRow aRow = new PLTableRow ();
int nWidthIndex = 0;
for (final PLTableCell aCell : aCells)
{
final PLTableCell aRealCell = aCell != null ? aCell : new PLTableCell (new PLSpacerX ());
final int nColSpan = aRealCell.getColSpan ();
if (nColSpan == 1)
{
aRow.addCell (aRealCell, m_aWidths.get (nWidthIndex));
}
else
{
if (m_eCommonWidthType == null)
throw new IllegalArgumentException ("Since columns with different width types are used, 'colspan' must be 1");
final List aWidths = m_aWidths.subList (nWidthIndex, nWidthIndex + nColSpan);
WidthSpec aRealWidth;
if (m_eCommonWidthType == EValueUOMType.STAR)
{
// aggregate
aRealWidth = WidthSpec.perc (nColSpan * 100f / m_aWidths.size ());
}
else
{
// aggregate values
float fWidth = 0;
for (final WidthSpec aWidth : aWidths)
fWidth += aWidth.getValue ();
aRealWidth = new WidthSpec (m_eCommonWidthType, fWidth);
}
aRow.addCell (aRealCell, aRealWidth);
}
nWidthIndex += nColSpan;
}
addRow (aRow, aHeight);
return aRow;
}
@Nonnull
public PLTable addRow (@Nonnull final PLTableRow aRow)
{
return addRow (aRow, m_aRows.getDefaultHeight ());
}
@Nonnull
public PLTable addRow (@Nonnull final PLTableRow aRow, @Nonnull final HeightSpec aHeight)
{
ValueEnforcer.notNull (aRow, "Row");
m_aRows.addRow (aRow, aHeight);
return this;
}
/**
* Don't call this.
*
* @return this for chaining
*/
@Nonnull
@Deprecated
public PLTable addRow ()
{
LOGGER.warn ("You are calling the no-operation method 'PLTable.addRow()' - no row is added!!!");
return this;
}
/**
* Add a new table row with auto height. All contained elements are added with
* the specified width in the constructor. null elements are
* represented as empty cells.
*
* @param aCells
* The cells to add. May not be null.
* @return this
*/
@Nonnull
public PLTable addRow (@Nonnull final PLTableCell... aCells)
{
return addRow (new CommonsArrayList <> (aCells), m_aRows.getDefaultHeight ());
}
/**
* Add a new table row with auto height. All contained elements are added with
* the specified width in the constructor. null elements are
* represented as empty cells.
*
* @param aCells
* The cells to add. May not be null.
* @return this
*/
@Nonnull
public PLTable addRow (@Nonnull final Iterable aCells)
{
return addRow (aCells, m_aRows.getDefaultHeight ());
}
/**
* Add a new table row. All contained elements are added with the specified
* width in the constructor. null elements are represented as
* empty cells.
*
* @param aCells
* The cells to add. May not be null.
* @param aHeight
* Row height to be used.
* @return this
*/
@Nonnull
public PLTable addRow (@Nonnull final Iterable aCells, @Nonnull final HeightSpec aHeight)
{
addAndReturnRow (aCells, aHeight);
return this;
}
public void forEachRow (@Nonnull final Consumer aConsumer)
{
m_aRows.forEachRow (x -> aConsumer.accept ((PLTableRow) x.getElement ()));
}
public void forEachRowByIndex (@Nonnull final ObjIntConsumer aConsumer)
{
m_aRows.forEachRowByIndex ( (x, idx) -> aConsumer.accept ((PLTableRow) x.getElement (), idx));
}
public void forEachRow (final int nStartRowIncl, final int nEndRowIncl, @Nonnull final Consumer aConsumer)
{
forEachRowByIndex ( (x, idx) -> {
if (idx >= nStartRowIncl && idx <= nEndRowIncl)
aConsumer.accept (x);
});
}
public void forEachRow (final int nStartRowIncl, final int nEndRowIncl, @Nonnull final ObjIntConsumer aConsumer)
{
forEachRowByIndex ( (x, idx) -> {
if (idx >= nStartRowIncl && idx <= nEndRowIncl)
aConsumer.accept (x, idx);
});
}
@Nonnegative
public int getRowCount ()
{
return m_aRows.getRowCount ();
}
public void forEachCell (@Nonnull final Consumer aConsumer)
{
forEachRow (x -> x.forEachCell (aConsumer));
}
@Nullable
public PLTableRow getRowAtIndex (@Nonnegative final int nIndex)
{
final PLVBoxRow aRow = m_aRows.getRowAtIndex (nIndex);
return aRow == null ? null : (PLTableRow) aRow.getElement ();
}
@Nullable
public PLTableCell getCellAtIndex (@Nonnegative final int nRowIndex, @Nonnegative final int nColIndex)
{
final PLTableRow aRow = getRowAtIndex (nRowIndex);
return aRow == null ? null : aRow.getCellAtIndex (nColIndex);
}
@Override
@Nonnull
public EChange visit (@Nonnull final IPLVisitor aVisitor) throws IOException
{
final EChange ret = super.visit (aVisitor);
return ret.or (m_aRows.visit (aVisitor));
}
@Override
@OverridingMethodsMustInvokeSuper
protected SizeSpec onPrepare (@Nonnull final PreparationContext aCtx)
{
final float fElementWidth = aCtx.getAvailableWidth () - getOutlineXSum ();
final float fElementHeight = aCtx.getAvailableHeight () - getOutlineYSum ();
final PreparationContext aChildCtx = new PreparationContext (aCtx.getGlobalContext (), fElementWidth, fElementHeight);
final SizeSpec aVBoxPreparedSize = m_aRows.prepare (aChildCtx);
return aVBoxPreparedSize.plus (m_aRows.getOutlineXSum (), m_aRows.getOutlineYSum ());
}
@Override
protected void onMarkAsNotPrepared ()
{
m_aRows.internalMarkAsNotPrepared ();
}
public final boolean isVertSplittable ()
{
return m_aRows.isVertSplittable ();
}
@Nonnull
public final PLTable setVertSplittable (final boolean bVertSplittable)
{
m_aRows.setVertSplittable (bVertSplittable);
return this;
}
@Override
@Nonnull
public PLTable internalCreateNewVertSplitObject (@Nonnull final PLTable aBase)
{
throw new UnsupportedOperationException ();
}
@Nullable
public PLSplitResult splitElementVert (final float fAvailableWidth, final float fAvailableHeight)
{
final float fSplitHeight = fAvailableHeight;
if (PLDebugLog.isDebugSplit ())
PLDebugLog.debugSplit (this,
"Trying to split " +
m_aRows.getDebugID () +
" into pieces for available width " +
fAvailableWidth +
" and height " +
fSplitHeight);
final PLSplitResult ret = m_aRows.splitElementVert (fAvailableWidth, fSplitHeight);
if (ret == null)
return ret;
final PLTable aTable1 = new PLTable (m_aWidths);
aTable1.setID (getID () + "-1");
aTable1.setBasicDataFrom (this);
aTable1.internalMarkAsPrepared (ret.getFirstElement ().getSize ());
aTable1.m_aRows = (PLVBox) ret.getFirstElement ().getElement ();
final PLTable aTable2 = new PLTable (m_aWidths);
aTable2.setID (getID () + "-2");
aTable2.setBasicDataFrom (this);
aTable2.internalMarkAsPrepared (ret.getSecondElement ().getSize ());
aTable2.m_aRows = (PLVBox) ret.getSecondElement ().getElement ();
return new PLSplitResult (new PLElementWithSize (aTable1, ret.getFirstElement ().getSize ()),
new PLElementWithSize (aTable2, ret.getSecondElement ().getSize ()));
}
@Override
protected void onRender (@Nonnull final PageRenderContext aCtx) throws IOException
{
final PageRenderContext aChildCtx = new PageRenderContext (aCtx,
aCtx.getStartLeft () + getMarginLeft (),
aCtx.getStartTop () - getMarginTop (),
aCtx.getWidth () - getMarginXSum (),
aCtx.getHeight () - getMarginYSum ());
m_aRows.render (aChildCtx);
}
@Override
public String toString ()
{
return ToStringGenerator.getDerived (super.toString ())
.append ("Rows", m_aRows)
.append ("Width", m_aWidths)
.append ("WidthType", m_eCommonWidthType)
.append ("Margin", m_aMargin)
.getToString ();
}
/**
* Create a new table with the specified percentages.
*
* @param aPercentages
* The array to use. The sum of all percentages should be ≤ 100. May
* neither be null nor empty.
* @return The created {@link PLTable} and never null.
*/
@Nonnull
@ReturnsMutableCopy
public static PLTable createWithPercentage (@Nonnull @Nonempty final float... aPercentages)
{
ValueEnforcer.notEmpty (aPercentages, "Percentages");
final ICommonsList aWidths = new CommonsArrayList <> (aPercentages.length);
for (final float fPercentage : aPercentages)
aWidths.add (WidthSpec.perc (fPercentage));
return new PLTable (aWidths);
}
/**
* Create a new table with evenly sized columns.
*
* @param nColumnCount
* The number of columns to use. Must be > 0.
* @return The created {@link PLTable} and never null.
*/
@Nonnull
@ReturnsMutableCopy
public static PLTable createWithEvenlySizedColumns (@Nonnegative final int nColumnCount)
{
ValueEnforcer.isGT0 (nColumnCount, "ColumnCount");
final ICommonsList aWidths = new CommonsArrayList <> (nColumnCount);
for (int i = 0; i < nColumnCount; ++i)
aWidths.add (WidthSpec.star ());
return new PLTable (aWidths);
}
}
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