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/*
 * $Id: ColumnText.java 4091 2009-11-10 15:15:28Z psoares33 $
 *
 * Copyright 2001, 2002 by Paulo Soares.
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library 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 Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * https://github.com/LibrePDF/OpenPDF
 */

package com.lowagie.text.pdf;

import com.lowagie.text.Chunk;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Element;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.Image;
import com.lowagie.text.ListItem;
import com.lowagie.text.Paragraph;
import com.lowagie.text.Phrase;
import com.lowagie.text.SimpleTable;
import com.lowagie.text.error_messages.MessageLocalization;
import com.lowagie.text.pdf.draw.DrawInterface;

import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Stack;

/**
 * Formats text in a columnwise form. The text is bound
 * on the left and on the right by a sequence of lines. This allows the column
 * to have any shape, not only rectangular.
 * 

* Several parameters can be set like the first paragraph line indent and * extra space between paragraphs. *

* A call to the method go will return one of the following * situations: the column ended or the text ended. *

* I the column ended, a new column definition can be loaded with the method * setColumns and the method go can be called again. *

* If the text ended, more text can be loaded with addText * and the method go can be called again.
* The only limitation is that one or more complete paragraphs must be loaded * each time. *

* Full bidirectional reordering is supported. If the run direction is * PdfWriter.RUN_DIRECTION_RTL the meaning of the horizontal * alignments and margins is mirrored. * @author Paulo Soares ([email protected]) */ public class ColumnText { /** Eliminate the arabic vowels */ public static final int AR_NOVOWEL = ArabicLigaturizer.ar_novowel; /** Compose the tashkeel in the ligatures. */ public static final int AR_COMPOSEDTASHKEEL = ArabicLigaturizer.ar_composedtashkeel; /** Do some extra double ligatures. */ public static final int AR_LIG = ArabicLigaturizer.ar_lig; /** * Digit shaping option: Replace European digits (U+0030...U+0039) by Arabic-Indic digits. */ public static final int DIGITS_EN2AN = ArabicLigaturizer.DIGITS_EN2AN; /** * Digit shaping option: Replace Arabic-Indic digits by European digits (U+0030...U+0039). */ public static final int DIGITS_AN2EN = ArabicLigaturizer.DIGITS_AN2EN; /** * Digit shaping option: * Replace European digits (U+0030...U+0039) by Arabic-Indic digits * if the most recent strongly directional character * is an Arabic letter (its Bidi direction value is RIGHT_TO_LEFT_ARABIC). * The initial state at the start of the text is assumed to be not an Arabic, * letter, so European digits at the start of the text will not change. * Compare to DIGITS_ALEN2AN_INIT_AL. */ public static final int DIGITS_EN2AN_INIT_LR = ArabicLigaturizer.DIGITS_EN2AN_INIT_LR; /** * Digit shaping option: * Replace European digits (U+0030...U+0039) by Arabic-Indic digits * if the most recent strongly directional character * is an Arabic letter (its Bidi direction value is RIGHT_TO_LEFT_ARABIC). * The initial state at the start of the text is assumed to be an Arabic, * letter, so European digits at the start of the text will change. * Compare to DIGITS_ALEN2AN_INT_LR. */ public static final int DIGITS_EN2AN_INIT_AL = ArabicLigaturizer.DIGITS_EN2AN_INIT_AL; /** * Digit type option: Use Arabic-Indic digits (U+0660...U+0669). */ public static final int DIGIT_TYPE_AN = ArabicLigaturizer.DIGIT_TYPE_AN; /** * Digit type option: Use Eastern (Extended) Arabic-Indic digits (U+06f0...U+06f9). */ public static final int DIGIT_TYPE_AN_EXTENDED = ArabicLigaturizer.DIGIT_TYPE_AN_EXTENDED; protected int runDirection = PdfWriter.RUN_DIRECTION_DEFAULT; /** the space char ratio */ public static final float GLOBAL_SPACE_CHAR_RATIO = 0; /** Initial value of the status. */ public static final int START_COLUMN = 0; /** Signals that there is no more text available. */ public static final int NO_MORE_TEXT = 1; /** Signals that there is no more column. */ public static final int NO_MORE_COLUMN = 2; /** The column is valid. */ protected static final int LINE_STATUS_OK = 0; /** The line is out the column limits. */ protected static final int LINE_STATUS_OFFLIMITS = 1; /** The line cannot fit this column position. */ protected static final int LINE_STATUS_NOLINE = 2; /** Upper bound of the column. */ protected float maxY; /** Lower bound of the column. */ protected float minY; protected float leftX; protected float rightX; /** The column alignment. Default is left alignment. */ protected int alignment = Element.ALIGN_LEFT; /** The left column bound. */ protected List leftWall; /** The right column bound. */ protected List rightWall; /** The chunks that form the text. */ // protected ArrayList chunks = new ArrayList(); protected BidiLine bidiLine; /** The current y line location. Text will be written at this line minus the leading. */ protected float yLine; /** The leading for the current line. */ protected float currentLeading = 16; /** The fixed text leading. */ protected float fixedLeading = 16; /** The text leading that is multiplied by the biggest font size in the line. */ protected float multipliedLeading = 0; /** The PdfContent where the text will be written to. */ protected PdfContentByte canvas; protected PdfContentByte[] canvases; /** The line status when trying to fit a line to a column. */ protected int lineStatus; /** The first paragraph line indent. */ protected float indent = 0; /** The following paragraph lines indent. */ protected float followingIndent = 0; /** The right paragraph lines indent. */ protected float rightIndent = 0; /** The extra space between paragraphs. */ protected float extraParagraphSpace = 0; /** The width of the line when the column is defined as a simple rectangle. */ protected float rectangularWidth = -1; protected boolean rectangularMode = false; /** Holds value of property spaceCharRatio. */ private float spaceCharRatio = GLOBAL_SPACE_CHAR_RATIO; private boolean lastWasNewline = true; /** Holds value of property linesWritten. */ private int linesWritten; private float firstLineY; private boolean firstLineYDone = false; /** Holds value of property arabicOptions. */ private int arabicOptions = 0; protected float descender; protected boolean composite = false; protected ColumnText compositeColumn; protected LinkedList compositeElements; protected int listIdx = 0; private boolean splittedRow; protected Phrase waitPhrase; /** if true, first line height is adjusted so that the max ascender touches the top */ private boolean useAscender = false; /** Holds value of property filledWidth. */ private float filledWidth; private boolean adjustFirstLine = true; /** * Creates a ColumnText. * * @param canvas the place where the text will be written to. Can * be a template. */ public ColumnText(PdfContentByte canvas) { this.canvas = canvas; } /** * Creates an independent duplicated of the instance org. * * @param org the original ColumnText * @return the duplicated */ public static ColumnText duplicate(ColumnText org) { ColumnText ct = new ColumnText(null); ct.setACopy(org); return ct; } /** * Makes this instance an independent copy of org. * * @param org the original ColumnText * @return itself */ public ColumnText setACopy(ColumnText org) { setSimpleVars(org); if (org.bidiLine != null) bidiLine = new BidiLine(org.bidiLine); return this; } protected void setSimpleVars(ColumnText org) { maxY = org.maxY; minY = org.minY; alignment = org.alignment; leftWall = null; if (org.leftWall != null) leftWall = new ArrayList<>(org.leftWall); rightWall = null; if (org.rightWall != null) rightWall = new ArrayList<>(org.rightWall); yLine = org.yLine; currentLeading = org.currentLeading; fixedLeading = org.fixedLeading; multipliedLeading = org.multipliedLeading; canvas = org.canvas; canvases = org.canvases; lineStatus = org.lineStatus; indent = org.indent; followingIndent = org.followingIndent; rightIndent = org.rightIndent; extraParagraphSpace = org.extraParagraphSpace; rectangularWidth = org.rectangularWidth; rectangularMode = org.rectangularMode; spaceCharRatio = org.spaceCharRatio; lastWasNewline = org.lastWasNewline; linesWritten = org.linesWritten; arabicOptions = org.arabicOptions; runDirection = org.runDirection; descender = org.descender; composite = org.composite; splittedRow = org.splittedRow; if (org.composite) { compositeElements = new LinkedList<>(org.compositeElements); if (splittedRow) { PdfPTable table = (PdfPTable)compositeElements.getFirst(); compositeElements.set(0, new PdfPTable(table)); } if (org.compositeColumn != null) compositeColumn = duplicate(org.compositeColumn); } listIdx = org.listIdx; firstLineY = org.firstLineY; leftX = org.leftX; rightX = org.rightX; firstLineYDone = org.firstLineYDone; waitPhrase = org.waitPhrase; useAscender = org.useAscender; filledWidth = org.filledWidth; adjustFirstLine = org.adjustFirstLine; } private void addWaitingPhrase() { if (bidiLine == null && waitPhrase != null) { bidiLine = new BidiLine(); for (Object o : waitPhrase.getChunks()) { bidiLine.addChunk(new PdfChunk((Chunk) o, null)); } waitPhrase = null; } } /** * Adds a Phrase to the current text array. * Will not have any effect if addElement() was called before. * * @param phrase the text */ public void addText(Phrase phrase) { if (phrase == null || composite) return; addWaitingPhrase(); if (bidiLine == null) { waitPhrase = phrase; return; } for (Object o : phrase.getChunks()) { bidiLine.addChunk(new PdfChunk((Chunk) o, null)); } } /** * Replaces the current text array with this Phrase. * Anything added previously with addElement() is lost. * * @param phrase the text */ public void setText(Phrase phrase) { bidiLine = null; composite = false; compositeColumn = null; compositeElements = null; listIdx = 0; splittedRow = false; waitPhrase = phrase; } /** * Adds a Chunk to the current text array. * Will not have any effect if addElement() was called before. * * @param chunk the text */ public void addText(Chunk chunk) { if (chunk == null || composite) return; addText(new Phrase(chunk)); } /** * Adds an element. Elements supported are Paragraph, * List, PdfPTable, Image and * Graphic. *

* It removes all the text placed with addText(). * * @param element the Element */ public void addElement(Element element) { if (element == null) return; if (element instanceof Image) { Image img = (Image)element; PdfPTable t = new PdfPTable(1); float w = img.getWidthPercentage(); if (w == 0) { t.setTotalWidth(img.getScaledWidth()); t.setLockedWidth(true); } else t.setWidthPercentage(w); t.setSpacingAfter(img.getSpacingAfter()); t.setSpacingBefore(img.getSpacingBefore()); switch (img.getAlignment()) { case Image.LEFT: t.setHorizontalAlignment(Element.ALIGN_LEFT); break; case Image.RIGHT: t.setHorizontalAlignment(Element.ALIGN_RIGHT); break; default: t.setHorizontalAlignment(Element.ALIGN_CENTER); break; } PdfPCell c = new PdfPCell(img, true); c.setPadding(0); c.setBorder(img.getBorder()); c.setBorderColor(img.getBorderColor()); c.setBorderWidth(img.getBorderWidth()); c.setBackgroundColor(img.getBackgroundColor()); t.addCell(c); element = t; } if (element.type() == Element.CHUNK) { element = new Paragraph((Chunk)element); } else if (element.type() == Element.PHRASE) { element = new Paragraph((Phrase)element); } if (element instanceof SimpleTable) { try { element = ((SimpleTable)element).createPdfPTable(); } catch (DocumentException e) { throw new IllegalArgumentException(MessageLocalization.getComposedMessage("element.not.allowed")); } } else if (element.type() != Element.PARAGRAPH && element.type() != Element.LIST && element.type() != Element.PTABLE && element.type() != Element.YMARK) throw new IllegalArgumentException(MessageLocalization.getComposedMessage("element.not.allowed")); if (!composite) { composite = true; compositeElements = new LinkedList<>(); bidiLine = null; waitPhrase = null; } compositeElements.add(element); } /** * Converts a sequence of lines representing one of the column bounds into * an internal format. *

* Each array element will contain a float[4] representing * the line x = ax + b. * * @param cLine the column array * @return the converted array */ protected List convertColumn(float[] cLine) { if (cLine.length < 4) throw new RuntimeException(MessageLocalization.getComposedMessage("no.valid.column.line.found")); List cc = new ArrayList<>(); for (int k = 0; k < cLine.length - 2; k += 2) { if (cLine.length == k + 3){ break; } float x1 = cLine[k]; float y1 = cLine[k + 1]; float x2 = cLine[k + 2]; float y2 = cLine[k + 3]; if (y1 == y2) continue; // x = ay + b float a = (x1 - x2) / (y1 - y2); float b = x1 - a * y1; float[] r = new float[4]; r[0] = Math.min(y1, y2); r[1] = Math.max(y1, y2); r[2] = a; r[3] = b; cc.add(r); maxY = Math.max(maxY, r[1]); minY = Math.min(minY, r[0]); } if (cc.isEmpty()) throw new RuntimeException(MessageLocalization.getComposedMessage("no.valid.column.line.found")); return cc; } /** * Finds the intersection between the yLine and the column. It will * set the lineStatus appropriately. * * @param wall the column to intersect * @return the x coordinate of the intersection */ protected float findLimitsPoint(List wall) { lineStatus = LINE_STATUS_OK; if (yLine < minY || yLine > maxY) { lineStatus = LINE_STATUS_OFFLIMITS; return 0; } for (Object o : wall) { float[] r = (float[]) o; if (yLine < r[0] || yLine > r[1]) continue; return r[2] * yLine + r[3]; } lineStatus = LINE_STATUS_NOLINE; return 0; } /** * Finds the intersection between the yLine and the two * column bounds. It will set the lineStatus appropriately. * * @return a float[2]with the x coordinates of the intersection */ protected float[] findLimitsOneLine() { float x1 = findLimitsPoint(leftWall); if (lineStatus == LINE_STATUS_OFFLIMITS || lineStatus == LINE_STATUS_NOLINE) return null; float x2 = findLimitsPoint(rightWall); if (lineStatus == LINE_STATUS_NOLINE) return null; return new float[]{x1, x2}; } /** * Finds the intersection between the yLine, * the yLine-leadingand the two column bounds. * It will set the lineStatus appropriately. * * @return a float[4]with the x coordinates of the intersection */ protected float[] findLimitsTwoLines() { boolean repeat = false; for (;;) { if (repeat && currentLeading == 0) return null; repeat = true; float[] x1 = findLimitsOneLine(); if (lineStatus == LINE_STATUS_OFFLIMITS) return null; yLine -= currentLeading; if (lineStatus == LINE_STATUS_NOLINE) { continue; } float[] x2 = findLimitsOneLine(); if (lineStatus == LINE_STATUS_OFFLIMITS) return null; if (lineStatus == LINE_STATUS_NOLINE) { yLine -= currentLeading; continue; } if (x1[0] >= x2[1] || x2[0] >= x1[1]) continue; return new float[]{x1[0], x1[1], x2[0], x2[1]}; } } /** * Sets the columns bounds. Each column bound is described by a * float[] with the line points [x1,y1,x2,y2,...]. * The array must have at least 4 elements. * * @param leftLine the left column bound * @param rightLine the right column bound */ public void setColumns(float[] leftLine, float[] rightLine) { maxY = -10e20f; minY = 10e20f; setYLine(Math.max(leftLine[1], leftLine[leftLine.length - 1])); rightWall = convertColumn(rightLine); leftWall = convertColumn(leftLine); rectangularWidth = -1; rectangularMode = false; } /** * Simplified method for rectangular columns. * * @param phrase a Phrase * @param llx the lower left x corner * @param lly the lower left y corner * @param urx the upper right x corner * @param ury the upper right y corner * @param leading the leading * @param alignment the column alignment */ public void setSimpleColumn(Phrase phrase, float llx, float lly, float urx, float ury, float leading, int alignment) { addText(phrase); setSimpleColumn(llx, lly, urx, ury, leading, alignment); } /** * Simplified method for rectangular columns. * * @param llx the lower left x corner * @param lly the lower left y corner * @param urx the upper right x corner * @param ury the upper right y corner * @param leading the leading * @param alignment the column alignment */ public void setSimpleColumn(float llx, float lly, float urx, float ury, float leading, int alignment) { setLeading(leading); this.alignment = alignment; setSimpleColumn(llx, lly, urx, ury); } /** * Simplified method for rectangular columns. * * @param llx lower-left-x * @param lly lower-left-y * @param urx upper-right-x * @param ury upper-right-y */ public void setSimpleColumn(float llx, float lly, float urx, float ury) { leftX = Math.min(llx, urx); maxY = Math.max(lly, ury); minY = Math.min(lly, ury); rightX = Math.max(llx, urx); yLine = maxY; rectangularWidth = rightX - leftX; if (rectangularWidth < 0) rectangularWidth = 0; rectangularMode = true; } /** * Sets the leading to fixed. * * @param leading the leading */ public void setLeading(float leading) { fixedLeading = leading; multipliedLeading = 0; } /** * Sets the leading fixed and variable. The resultant leading will be * fixedLeading+multipliedLeading*maxFontSize where maxFontSize is the * size of the biggest font in the line. * * @param fixedLeading the fixed leading * @param multipliedLeading the variable leading */ public void setLeading(float fixedLeading, float multipliedLeading) { this.fixedLeading = fixedLeading; this.multipliedLeading = multipliedLeading; } /** * Gets the fixed leading. * * @return the leading */ public float getLeading() { return fixedLeading; } /** * Gets the variable leading. * * @return the leading */ public float getMultipliedLeading() { return multipliedLeading; } /** * Sets the yLine. The line will be written to yLine-leading. * * @param yLine the yLine */ public void setYLine(float yLine) { this.yLine = yLine; } /** * Gets the yLine. * * @return the yLine */ public float getYLine() { return yLine; } /** * Sets the alignment. * * @param alignment the alignment */ public void setAlignment(int alignment) { this.alignment = alignment; } /** * Gets the alignment. * * @return the alignment */ public int getAlignment() { return alignment; } /** * Sets the first paragraph line indent. * * @param indent the indent */ public void setIndent(float indent) { this.indent = indent; lastWasNewline = true; } /** * Gets the first paragraph line indent. * * @return the indent */ public float getIndent() { return indent; } /** * Sets the following paragraph lines indent. * * @param indent the indent */ public void setFollowingIndent(float indent) { this.followingIndent = indent; lastWasNewline = true; } /** * Gets the following paragraph lines indent. * * @return the indent */ public float getFollowingIndent() { return followingIndent; } /** * Sets the right paragraph lines indent. * * @param indent the indent */ public void setRightIndent(float indent) { this.rightIndent = indent; lastWasNewline = true; } /** * Gets the right paragraph lines indent. * * @return the indent */ public float getRightIndent() { return rightIndent; } /** * Outputs the lines to the document. It is equivalent to go(false). * * @return returns the result of the operation. It can be NO_MORE_TEXT * and/or NO_MORE_COLUMN * @throws DocumentException on error */ public int go() throws DocumentException { return go(false); } /** * Outputs the lines to the document. The output can be simulated. * @param simulate true to simulate the writing to the document * @return returns the result of the operation. It can be NO_MORE_TEXT * and/or NO_MORE_COLUMN * @throws DocumentException on error */ public int go(boolean simulate) throws DocumentException { if (composite) return goComposite(simulate); addWaitingPhrase(); if (bidiLine == null) return NO_MORE_TEXT; descender = 0; linesWritten = 0; boolean dirty = false; float ratio = spaceCharRatio; Object[] currentValues = new Object[2]; PdfFont currentFont = null; currentValues[1] = 0.0F; PdfDocument pdf = null; PdfContentByte graphics = null; PdfContentByte text = null; firstLineY = Float.NaN; int localRunDirection = PdfWriter.RUN_DIRECTION_NO_BIDI; if (runDirection != PdfWriter.RUN_DIRECTION_DEFAULT) localRunDirection = runDirection; if (canvas != null) { graphics = canvas; pdf = canvas.getPdfDocument(); text = canvas.getDuplicate(); } else if (!simulate) throw new NullPointerException(MessageLocalization.getComposedMessage("columntext.go.with.simulate.eq.eq.false.and.text.eq.eq.null")); if (!simulate) { if (ratio == GLOBAL_SPACE_CHAR_RATIO) ratio = text.getPdfWriter().getSpaceCharRatio(); else if (ratio < 0.001f) ratio = 0.001f; } float firstIndent = 0; PdfLine line; float x1; int status = 0; while(true) { firstIndent = (lastWasNewline ? indent : followingIndent); // if (rectangularMode) { if (rectangularWidth <= firstIndent + rightIndent) { status = NO_MORE_COLUMN; if (bidiLine.isEmpty()) status |= NO_MORE_TEXT; break; } if (bidiLine.isEmpty()) { status = NO_MORE_TEXT; break; } line = bidiLine.processLine(leftX, rectangularWidth - firstIndent - rightIndent, alignment, localRunDirection, arabicOptions); if (line == null) { status = NO_MORE_TEXT; break; } float[] maxSize = line.getMaxSize(); if (isUseAscender() && Float.isNaN(firstLineY)) currentLeading = line.getAscender(); else currentLeading = Math.max(fixedLeading + maxSize[0] * multipliedLeading, maxSize[1]); if (yLine > maxY || yLine - currentLeading < minY ) { status = NO_MORE_COLUMN; bidiLine.restore(); break; } yLine -= currentLeading; if (!simulate && !dirty) { text.beginText(); dirty = true; } if (Float.isNaN(firstLineY)) firstLineY = yLine; updateFilledWidth(rectangularWidth - line.widthLeft()); x1 = leftX; } else { float yTemp = yLine; float[] xx = findLimitsTwoLines(); if (xx == null) { status = NO_MORE_COLUMN; if (bidiLine.isEmpty()) status |= NO_MORE_TEXT; yLine = yTemp; break; } if (bidiLine.isEmpty()) { status = NO_MORE_TEXT; yLine = yTemp; break; } x1 = Math.max(xx[0], xx[2]); float x2 = Math.min(xx[1], xx[3]); if (x2 - x1 <= firstIndent + rightIndent) continue; if (!simulate && !dirty) { text.beginText(); dirty = true; } line = bidiLine.processLine(x1, x2 - x1 - firstIndent - rightIndent, alignment, localRunDirection, arabicOptions); if (line == null) { status = NO_MORE_TEXT; yLine = yTemp; break; } } if (!simulate) { currentValues[0] = currentFont; text.setTextMatrix(x1 + (line.isRTL() ? rightIndent : firstIndent) + line.indentLeft(), yLine); pdf.writeLineToContent(line, text, graphics, currentValues, ratio); currentFont = (PdfFont)currentValues[0]; } lastWasNewline = line.isNewlineSplit(); yLine -= line.isNewlineSplit() ? extraParagraphSpace : 0; ++linesWritten; descender = line.getDescender(); } if (dirty) { text.endText(); if (canvas != null) { canvas.add(text); } } return status; } /** * Sets the extra space between paragraphs. * * @return the extra space between paragraphs */ public float getExtraParagraphSpace() { return extraParagraphSpace; } /** * Sets the extra space between paragraphs. * * @param extraParagraphSpace the extra space between paragraphs */ public void setExtraParagraphSpace(float extraParagraphSpace) { this.extraParagraphSpace = extraParagraphSpace; } /** * Clears the chunk array. * A call to go() will always return NO_MORE_TEXT. */ public void clearChunks() { if (bidiLine != null) bidiLine.clearChunks(); } /** * Gets the space/character extra spacing ratio for fully justified text. * * @return the space/character extra spacing ratio */ public float getSpaceCharRatio() { return spaceCharRatio; } /** * Sets the ratio between the extra word spacing and the extra character * spacing when the text is fully justified. * Extra word spacing will grow spaceCharRatio times more * than extra character spacing. * If the ratio is PdfWriter.NO_SPACE_CHAR_RATIO then the * extra character spacing will be zero. * * @param spaceCharRatio the ratio between the extra word spacing and the extra character spacing */ public void setSpaceCharRatio(float spaceCharRatio) { this.spaceCharRatio = spaceCharRatio; } /** * Sets the run direction. * * @param runDirection the run direction */ public void setRunDirection(int runDirection) { if (runDirection < PdfWriter.RUN_DIRECTION_DEFAULT || runDirection > PdfWriter.RUN_DIRECTION_RTL) throw new RuntimeException(MessageLocalization.getComposedMessage("invalid.run.direction.1", runDirection)); this.runDirection = runDirection; } /** * Gets the run direction. * * @return the run direction */ public int getRunDirection() { return runDirection; } /** * Gets the number of lines written. * * @return the number of lines written */ public int getLinesWritten() { return this.linesWritten; } /** * Gets the arabic shaping options. * * @return the arabic shaping options */ public int getArabicOptions() { return this.arabicOptions; } /** * Sets the arabic shaping options. The option can be AR_NOVOWEL, * AR_COMPOSEDTASHKEEL and AR_LIG. * * @param arabicOptions the arabic shaping options */ public void setArabicOptions(int arabicOptions) { this.arabicOptions = arabicOptions; } /** * Gets the biggest descender value of the last line written. * * @return the biggest descender value of the last line written */ public float getDescender() { return descender; } /** * Gets the width that the line will occupy after writing. * Only the width of the first line is returned. * * @param phrase the Phrase containing the line * @param runDirection the run direction * @param arabicOptions the options for the arabic shaping * @return the width of the line */ public static float getWidth(Phrase phrase, int runDirection, int arabicOptions) { ColumnText ct = new ColumnText(null); ct.addText(phrase); ct.addWaitingPhrase(); PdfLine line = ct.bidiLine.processLine(0, 20000, Element.ALIGN_LEFT, runDirection, arabicOptions); if (line == null) return 0; else return 20000 - line.widthLeft(); } /** * Gets the width that the line will occupy after writing. * Only the width of the first line is returned. * * @param phrase the Phrase containing the line * @return the width of the line */ public static float getWidth(Phrase phrase) { return getWidth(phrase, PdfWriter.RUN_DIRECTION_NO_BIDI, 0); } /** * Shows a line of text. Only the first line is written. * * @param canvas where the text is to be written to * @param alignment the alignment. It is not influenced by the run direction * @param phrase the Phrase with the text * @param x the x reference position * @param y the y reference position * @param rotation the rotation to be applied in degrees counterclockwise * @param runDirection the run direction * @param arabicOptions the options for the arabic shaping */ public static void showTextAligned(PdfContentByte canvas, int alignment, Phrase phrase, float x, float y, float rotation, int runDirection, int arabicOptions) { if (alignment != Element.ALIGN_LEFT && alignment != Element.ALIGN_CENTER && alignment != Element.ALIGN_RIGHT) alignment = Element.ALIGN_LEFT; canvas.saveState(); ColumnText ct = new ColumnText(canvas); float lly = -1; float ury = 2; float llx; float urx; switch (alignment) { case Element.ALIGN_LEFT: llx = 0; urx = 20000; break; case Element.ALIGN_RIGHT: llx = -20000; urx = 0; break; default: llx = -20000; urx = 20000; break; } if (rotation == 0) { llx += x; lly += y; urx += x; ury += y; } else { double alpha = rotation * Math.PI / 180.0; float cos = (float)Math.cos(alpha); float sin = (float)Math.sin(alpha); canvas.concatCTM(cos, sin, -sin, cos, x, y); } ct.setSimpleColumn(phrase, llx, lly, urx, ury, 2, alignment); if (runDirection == PdfWriter.RUN_DIRECTION_RTL) { if (alignment == Element.ALIGN_LEFT) alignment = Element.ALIGN_RIGHT; else if (alignment == Element.ALIGN_RIGHT) alignment = Element.ALIGN_LEFT; } ct.setAlignment(alignment); ct.setArabicOptions(arabicOptions); ct.setRunDirection(runDirection); try { ct.go(); } catch (DocumentException e) { throw new ExceptionConverter(e); } canvas.restoreState(); } /** * Shows a line of text. Only the first line is written. * * @param canvas where the text is to be written to * @param alignment the alignment * @param phrase the Phrase with the text * @param x the x reference position * @param y the y reference position * @param rotation the rotation to be applied in degrees counterclockwise */ public static void showTextAligned(PdfContentByte canvas, int alignment, Phrase phrase, float x, float y, float rotation) { showTextAligned(canvas, alignment, phrase, x, y, rotation, PdfWriter.RUN_DIRECTION_NO_BIDI, 0); } protected int goComposite(boolean simulate) throws DocumentException { if (!rectangularMode) throw new DocumentException(MessageLocalization.getComposedMessage("irregular.columns.are.not.supported.in.composite.mode")); linesWritten = 0; descender = 0; boolean firstPass = adjustFirstLine; main_loop: while (true) { if (compositeElements.isEmpty()) { return NO_MORE_TEXT; } Element element = compositeElements.getFirst(); if (element.type() == Element.PARAGRAPH) { Paragraph para = (Paragraph)element; int status = 0; for (int keep = 0; keep < 2; ++keep) { float lastY = yLine; boolean createHere = false; if (compositeColumn == null) { compositeColumn = new ColumnText(canvas); compositeColumn.setUseAscender(firstPass && useAscender); compositeColumn.setAlignment(para.getAlignment()); compositeColumn.setIndent(para.getIndentationLeft() + para.getFirstLineIndent()); compositeColumn.setExtraParagraphSpace(para.getExtraParagraphSpace()); compositeColumn.setFollowingIndent(para.getIndentationLeft()); compositeColumn.setRightIndent(para.getIndentationRight()); compositeColumn.setLeading(para.getLeading(), para.getMultipliedLeading()); compositeColumn.setRunDirection(runDirection); compositeColumn.setArabicOptions(arabicOptions); compositeColumn.setSpaceCharRatio(spaceCharRatio); compositeColumn.addText(para); if (!firstPass) { yLine -= para.getSpacingBefore(); } createHere = true; } compositeColumn.leftX = leftX; compositeColumn.rightX = rightX; compositeColumn.yLine = yLine; compositeColumn.rectangularWidth = rectangularWidth; compositeColumn.rectangularMode = rectangularMode; compositeColumn.minY = minY; compositeColumn.maxY = maxY; boolean keepCandidate = (para.getKeepTogether() && createHere && !firstPass); status = compositeColumn.go(simulate || (keepCandidate && keep == 0)); updateFilledWidth(compositeColumn.filledWidth); if ((status & NO_MORE_TEXT) == 0 && keepCandidate) { compositeColumn = null; yLine = lastY; return NO_MORE_COLUMN; } if (simulate || !keepCandidate) break; if (keep == 0) { compositeColumn = null; yLine = lastY; } } firstPass = false; if (compositeColumn != null) { yLine = compositeColumn.yLine; linesWritten += compositeColumn.linesWritten; descender = compositeColumn.descender; } if ((status & NO_MORE_TEXT) != 0) { compositeColumn = null; compositeElements.removeFirst(); yLine -= para.getSpacingAfter(); } if ((status & NO_MORE_COLUMN) != 0) { return NO_MORE_COLUMN; } } else if (element.type() == Element.LIST) { com.lowagie.text.List list = (com.lowagie.text.List)element; java.util.List items = list.getItems(); ListItem item = null; float listIndentation = list.getIndentationLeft(); int count = 0; Stack stack = new Stack<>(); for (int k = 0; k < items.size(); ++k) { Object obj = items.get(k); if (obj instanceof ListItem) { if (count == listIdx) { item = (ListItem)obj; break; } else ++count; } else if (obj instanceof com.lowagie.text.List) { stack.push(new Object[]{list, k, listIndentation}); list = (com.lowagie.text.List)obj; items = list.getItems(); listIndentation += list.getIndentationLeft(); k = -1; continue; } if (k == items.size() - 1) { if (!stack.isEmpty()) { Object[] objs = stack.pop(); list = (com.lowagie.text.List)objs[0]; items = list.getItems(); k = (Integer) objs[1]; listIndentation = (Float) objs[2]; } } } int status = 0; for (int keep = 0; keep < 2; ++keep) { float lastY = yLine; boolean createHere = false; if (compositeColumn == null) { if (item == null) { listIdx = 0; compositeElements.removeFirst(); continue main_loop; } compositeColumn = new ColumnText(canvas); compositeColumn.setUseAscender(firstPass && useAscender); compositeColumn.setAlignment(item.getAlignment()); compositeColumn.setIndent(item.getIndentationLeft() + listIndentation + item.getFirstLineIndent()); compositeColumn.setExtraParagraphSpace(item.getExtraParagraphSpace()); compositeColumn.setFollowingIndent(compositeColumn.getIndent()); compositeColumn.setRightIndent(item.getIndentationRight() + list.getIndentationRight()); compositeColumn.setLeading(item.getLeading(), item.getMultipliedLeading()); compositeColumn.setRunDirection(runDirection); compositeColumn.setArabicOptions(arabicOptions); compositeColumn.setSpaceCharRatio(spaceCharRatio); compositeColumn.addText(item); if (!firstPass) { yLine -= item.getSpacingBefore(); } createHere = true; } compositeColumn.leftX = leftX; compositeColumn.rightX = rightX; compositeColumn.yLine = yLine; compositeColumn.rectangularWidth = rectangularWidth; compositeColumn.rectangularMode = rectangularMode; compositeColumn.minY = minY; compositeColumn.maxY = maxY; boolean keepCandidate = (item != null && item.getKeepTogether() && createHere && !firstPass); status = compositeColumn.go(simulate || (keepCandidate && keep == 0)); updateFilledWidth(compositeColumn.filledWidth); if ((status & NO_MORE_TEXT) == 0 && keepCandidate) { compositeColumn = null; yLine = lastY; return NO_MORE_COLUMN; } if (simulate || !keepCandidate) break; if (keep == 0) { compositeColumn = null; yLine = lastY; } } firstPass = false; yLine = compositeColumn.yLine; linesWritten += compositeColumn.linesWritten; descender = compositeColumn.descender; if (!Float.isNaN(compositeColumn.firstLineY) && !compositeColumn.firstLineYDone) { if (!simulate && item != null) { showTextAligned(canvas, Element.ALIGN_LEFT, new Phrase(item.getListSymbol()), compositeColumn.leftX + listIndentation, compositeColumn.firstLineY, 0); } compositeColumn.firstLineYDone = true; } if ((status & NO_MORE_TEXT) != 0) { compositeColumn = null; ++listIdx; if (item != null) { yLine -= item.getSpacingAfter(); } } if ((status & NO_MORE_COLUMN) != 0) return NO_MORE_COLUMN; } else if (element.type() == Element.PTABLE) { // don't write anything in the current column if there's no more space available if (yLine < minY || yLine > maxY) return NO_MORE_COLUMN; // get the PdfPTable element PdfPTable table = (PdfPTable)element; // we ignore tables without a body if (table.size() <= table.getHeaderRows()) { compositeElements.removeFirst(); continue; } // offsets float yTemp = yLine; if (!firstPass && listIdx == 0) yTemp -= table.spacingBefore(); float yLineWrite = yTemp; // don't write anything in the current column if there's no more space available if (yTemp < minY || yTemp > maxY) return NO_MORE_COLUMN; // coordinates currentLeading = 0; float x1 = leftX; float tableWidth; if (table.isLockedWidth()) { tableWidth = table.getTotalWidth(); updateFilledWidth(tableWidth); } else { tableWidth = rectangularWidth * table.getWidthPercentage() / 100f; table.setTotalWidth(tableWidth); } // how many header rows are real header rows; how many are footer rows? int headerRows = table.getHeaderRows(); int footerRows = table.getFooterRows(); if (footerRows > headerRows) footerRows = headerRows; int realHeaderRows = headerRows - footerRows; float headerHeight = table.getHeaderHeight(); float footerHeight = table.getFooterHeight(); // make sure the header and footer fit on the page boolean skipHeader = (!firstPass && table.isSkipFirstHeader() && listIdx <= headerRows); if (!skipHeader) { yTemp -= headerHeight; if (yTemp < minY || yTemp > maxY) { if (firstPass) { compositeElements.removeFirst(); continue; } return NO_MORE_COLUMN; } } // how many real rows (not header or footer rows) fit on a page? int k; if (listIdx < headerRows) listIdx = headerRows; if (!table.isComplete()) yTemp -= footerHeight; for (k = listIdx; k < table.size(); ++k) { float rowHeight = table.getRowHeight(k); if (yTemp - rowHeight < minY) break; yTemp -= rowHeight; } if (!table.isComplete()) yTemp += footerHeight; // either k is the first row that doesn't fit on the page (break); if (k < table.size()) { if (table.isSplitRows() && (!table.isSplitLate() || (k == listIdx && firstPass))) { if (!splittedRow) { splittedRow = true; table = new PdfPTable(table); compositeElements.set(0, table); List rows = table.getRows(); for (int i = headerRows; i < listIdx; ++i) rows.set(i, null); } float h = yTemp - minY; PdfPRow newRow = table.getRow(k).splitRow(table, k, h); if (newRow == null) { if (k == listIdx) return NO_MORE_COLUMN; } else { yTemp = minY; table.getRows().add(++k, newRow); } } else if (!table.isSplitRows() && k == listIdx && firstPass) { compositeElements.removeFirst(); splittedRow = false; continue; } else if (k == listIdx && !firstPass && (!table.isSplitRows() || table.isSplitLate()) && (table.getFooterRows() == 0 || table.isComplete())) return NO_MORE_COLUMN; } // or k is the number of rows in the table (for loop was done). firstPass = false; // we draw the table (for real now) if (!simulate) { // set the alignment switch (table.getHorizontalAlignment()) { case Element.ALIGN_LEFT: break; case Element.ALIGN_RIGHT: x1 += rectangularWidth - tableWidth; break; default: x1 += (rectangularWidth - tableWidth) / 2f; } // copy the rows that fit on the page in a new table nt PdfPTable nt = PdfPTable.shallowCopy(table); List sub = nt.getRows(); // first we add the real header rows (if necessary) if (!skipHeader && realHeaderRows > 0) { sub.addAll(table.getRows(0, realHeaderRows)); } else nt.setHeaderRows(footerRows); // then we add the real content sub.addAll(table.getRows(listIdx, k)); // if k < table.size(), we must indicate that the new table is complete; // otherwise no footers will be added (because iText thinks the table continues on the same page) boolean showFooter = !table.isSkipLastFooter(); boolean newPageFollows = false; if (k < table.size()) { nt.setComplete(true); showFooter = true; newPageFollows = true; } // we add the footer rows if necessary (not for incomplete tables) for (int j = 0; j < footerRows && nt.isComplete() && showFooter; ++j) sub.add(table.getRow(j + realHeaderRows)); // we need a correction if the last row needs to be extended float rowHeight = 0; int index = sub.size() - 1; if (showFooter) index -= footerRows; PdfPRow last = sub.get(index); if (table.isExtendLastRow(newPageFollows)) { rowHeight = last.getMaxHeights(); last.setMaxHeights(yTemp - minY + rowHeight); yTemp = minY; } // now we render the rows of the new table if (canvases != null) nt.writeSelectedRows(0, -1, x1, yLineWrite, canvases); else nt.writeSelectedRows(0, -1, x1, yLineWrite, canvas); if (table.isExtendLastRow(newPageFollows)) { last.setMaxHeights(rowHeight); } } else if (table.isExtendLastRow() && minY > PdfPRow.BOTTOM_LIMIT) yTemp = minY; yLine = yTemp; if (!(skipHeader || table.isComplete())) yLine += footerHeight; if (k >= table.size()) { yLine -= table.spacingAfter(); compositeElements.removeFirst(); splittedRow = false; listIdx = 0; } else { if (splittedRow) { List rows = table.getRows(); for (int i = listIdx; i < k; ++i) rows.set(i, null); } listIdx = k; return NO_MORE_COLUMN; } } else if (element.type() == Element.YMARK) { if (!simulate) { DrawInterface zh = (DrawInterface)element; zh.draw(canvas, leftX, minY, rightX, maxY, yLine); } compositeElements.removeFirst(); } else compositeElements.removeFirst(); } } /** * Gets the canvas. * If a set of four canvases exists, the TEXTCANVAS is returned. * * @return a PdfContentByte. */ public PdfContentByte getCanvas() { return canvas; } /** * Sets the canvas. * If before a set of four canvases was set, it is being unset. * * @param canvas an object of {@link PdfContentByte} */ public void setCanvas(PdfContentByte canvas) { this.canvas = canvas; this.canvases = null; if (compositeColumn != null) compositeColumn.setCanvas(canvas); } /** * Sets the canvases. * * @param canvases an array of {@link PdfContentByte} */ public void setCanvases(PdfContentByte[] canvases) { this.canvases = canvases; this.canvas = canvases[PdfPTable.TEXTCANVAS]; if (compositeColumn != null) compositeColumn.setCanvases(canvases); } /** * Gets the canvases. * * @return an array of PdfContentByte */ public PdfContentByte[] getCanvases() { return canvases; } /** * Checks if the element has a height of 0. * * @return true or false * @since 2.1.2 */ public boolean zeroHeightElement() { return composite && !compositeElements.isEmpty() && compositeElements.getFirst().type() == Element.YMARK; } /** * Checks if UseAscender is enabled/disabled. * * @return true is the adjustment of the first line height is based on max ascender. */ public boolean isUseAscender() { return useAscender; } /** * Enables/Disables adjustment of first line height based on max ascender. * * @param useAscender enable adjustment if true */ public void setUseAscender(boolean useAscender) { this.useAscender = useAscender; } /** * Checks the status variable and looks if there's still some text. * * @param status statues variable * @return true if there's still some text else false */ public static boolean hasMoreText(int status) { return (status & ColumnText.NO_MORE_TEXT) == 0; } /** * Gets the real width used by the largest line. * * @return the real width used by the largest line */ public float getFilledWidth() { return filledWidth; } /** * Sets the real width used by the largest line. * Only used to set it to zero to start another measurement. * * @param filledWidth the real width used by the largest line */ public void setFilledWidth(float filledWidth) { this.filledWidth = filledWidth; } /** * Replaces the filledWidth if greater than the existing one. * * @param w the new filledWidth if greater than the existing one */ public void updateFilledWidth(float w) { if (w > filledWidth) filledWidth = w; } /** * Gets the first line adjustment property. * * @return the first line adjustment property. */ public boolean isAdjustFirstLine() { return adjustFirstLine; } /** * Sets the first line adjustment. * Some objects have properties, like spacing before, that behave * differently if the object is the first to be written after go() or not. * The first line adjustment is true by default but can be * changed if several objects are to be placed one after the other in the * same column calling go() several times. * * @param adjustFirstLine true to adjust the first line, false otherwise */ public void setAdjustFirstLine(boolean adjustFirstLine) { this.adjustFirstLine = adjustFirstLine; } }





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