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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2022 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
OF THIRD PARTY RIGHTS
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 http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
http://itextpdf.com/terms-of-use/
The interactive user interfaces in modified source and object code versions
of this program must display Appropriate Legal Notices, as required under
Section 5 of the GNU Affero General Public License.
In accordance with Section 7(b) of the GNU Affero General Public License,
a covered work must retain the producer line in every PDF that is created
or manipulated using iText.
You can be released from the requirements of the license by purchasing
a commercial license. Buying such a license is mandatory as soon as you
develop commercial activities involving the iText software without
disclosing the source code of your own applications.
These activities include: offering paid services to customers as an ASP,
serving PDFs on the fly in a web application, shipping iText with a closed
source product.
For more information, please contact iText Software Corp. at this
address: [email protected]
*/
package com.itextpdf.io.font.otf;
import com.itextpdf.io.util.TextUtil;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class GlyphLine {
public int start;
public int end;
public int idx;
protected List glyphs;
protected List actualText;
public GlyphLine() {
this.glyphs = new ArrayList<>();
}
/**
* Create a new line of Glyphs.
*
* @param glyphs list containing the glyphs
*/
public GlyphLine(List glyphs) {
this.glyphs = glyphs;
this.start = 0;
this.end = glyphs.size();
}
/**
* Create a new line of Glyphs from a slice of a List of Glyphs.
*
* @param glyphs list of Glyphs to slice
* @param start starting index of the slice
* @param end terminating index of the slice
*/
public GlyphLine(List glyphs, int start, int end) {
this.glyphs = glyphs;
this.start = start;
this.end = end;
}
/**
* Create a new line of Glyphs from a slice of a List of Glyphs, and add the actual text.
*
* @param glyphs list of Glyphs to slice
* @param actualText corresponding list containing the actual text the glyphs represent
* @param start starting index of the slice
* @param end terminating index of the slice
*/
protected GlyphLine(List glyphs, List actualText, int start, int end) {
this(glyphs, start, end);
this.actualText = actualText;
}
/**
* Copy a line of Glyphs.
*
* @param other line of Glyphs to copy
*/
public GlyphLine(GlyphLine other) {
this.glyphs = other.glyphs;
this.actualText = other.actualText;
this.start = other.start;
this.end = other.end;
this.idx = other.idx;
}
/**
* Copy a slice of a line of Glyphs
*
* @param other line of Glyphs to copy
* @param start starting index of the slice
* @param end terminating index of the slice
*/
public GlyphLine(GlyphLine other, int start, int end) {
this.glyphs = other.glyphs.subList(start, end);
if (other.actualText != null) {
this.actualText = other.actualText.subList(start, end);
}
this.start = 0;
this.end = end - start;
this.idx = other.idx - start;
}
/**
* Get the unicode string representation of the GlyphLine slice.
*
* @param start starting index of the slice
* @param end terminating index of the slice
* @return String containing the unicode representation of the slice.
*/
public String toUnicodeString(int start, int end) {
ActualTextIterator iter = new ActualTextIterator(this, start, end);
StringBuilder str = new StringBuilder();
while (iter.hasNext()) {
GlyphLinePart part = iter.next();
if (part.actualText != null) {
str.append(part.actualText);
} else {
for (int i = part.start; i < part.end; i++) {
str.append(glyphs.get(i).getUnicodeChars());
}
}
}
return str.toString();
}
@Override
public String toString() {
return toUnicodeString(start, end);
}
/**
* Copy a slice of this Glyphline.
*
* @param left leftmost index of the slice
* @param right rightmost index of the slice
* @return new GlyphLine containing the copied slice
*/
public GlyphLine copy(int left, int right) {
GlyphLine glyphLine = new GlyphLine();
glyphLine.start = 0;
glyphLine.end = right - left;
glyphLine.glyphs = new ArrayList<>(glyphs.subList(left, right));
glyphLine.actualText = actualText == null ? null : new ArrayList<>(actualText.subList(left, right));
return glyphLine;
}
public Glyph get(int index) {
return glyphs.get(index);
}
public Glyph set(int index, Glyph glyph) {
return glyphs.set(index, glyph);
}
public void add(Glyph glyph) {
glyphs.add(glyph);
if (actualText != null) {
actualText.add(null);
}
}
public void add(int index, Glyph glyph) {
glyphs.add(index, glyph);
if (actualText != null) {
actualText.add(index, null);
}
}
public void setGlyphs(List replacementGlyphs) {
glyphs = new ArrayList<>(replacementGlyphs);
start = 0;
end = replacementGlyphs.size();
actualText = null;
}
/**
* Add a line to the current one.
* The glyphs from the start till the end points will be copied.
* The same is true for the actual text.
*
* @param other the line that should be added to the current one
*/
public void add(GlyphLine other) {
if (other.actualText != null) {
if (actualText == null) {
actualText = new ArrayList(glyphs.size());
for (int i = 0; i < glyphs.size(); i++) {
actualText.add(null);
}
}
actualText.addAll(other.actualText.subList(other.start, other.end));
}
glyphs.addAll(other.glyphs.subList(other.start, other.end));
if (null != actualText) {
while (actualText.size() < glyphs.size()) {
actualText.add(null);
}
}
}
/**
* Replaces the current content with the other line's content.
*
* @param other the line with the content to be set to the current one
*/
public void replaceContent(GlyphLine other) {
glyphs.clear();
glyphs.addAll(other.glyphs);
if (other.actualText != null) {
if (actualText == null) {
actualText = new ArrayList<>();
} else {
actualText.clear();
}
actualText.addAll(other.actualText);
} else {
actualText = null;
}
start = other.start;
end = other.end;
}
public int size() {
return glyphs.size();
}
public void substituteManyToOne(OpenTypeFontTableReader tableReader, int lookupFlag, int rightPartLen, int substitutionGlyphIndex) {
OpenTableLookup.GlyphIndexer gidx = new OpenTableLookup.GlyphIndexer();
gidx.line = this;
gidx.idx = idx;
StringBuilder chars = new StringBuilder();
Glyph currentGlyph = glyphs.get(idx);
if (currentGlyph.getChars() != null) {
chars.append(currentGlyph.getChars());
} else if (currentGlyph.hasValidUnicode()) {
chars.append(TextUtil.convertFromUtf32(currentGlyph.getUnicode()));
}
for (int j = 0; j < rightPartLen; ++j) {
gidx.nextGlyph(tableReader, lookupFlag);
currentGlyph = glyphs.get(gidx.idx);
if (currentGlyph.getChars() != null) {
chars.append(currentGlyph.getChars());
} else if (currentGlyph.hasValidUnicode()) {
chars.append(TextUtil.convertFromUtf32(currentGlyph.getUnicode()));
}
removeGlyph(gidx.idx--);
}
char[] newChars = new char[chars.length()];
chars.getChars(0, chars.length(), newChars, 0);
Glyph newGlyph = tableReader.getGlyph(substitutionGlyphIndex);
newGlyph.setChars(newChars);
glyphs.set(idx, newGlyph);
end -= rightPartLen;
}
public void substituteOneToOne(OpenTypeFontTableReader tableReader, int substitutionGlyphIndex) {
Glyph oldGlyph = glyphs.get(idx);
Glyph newGlyph = tableReader.getGlyph(substitutionGlyphIndex);
if (oldGlyph.getChars() != null) {
newGlyph.setChars(oldGlyph.getChars());
} else if (newGlyph.hasValidUnicode()) {
newGlyph.setChars(TextUtil.convertFromUtf32(newGlyph.getUnicode()));
} else if (oldGlyph.hasValidUnicode()) {
newGlyph.setChars(TextUtil.convertFromUtf32(oldGlyph.getUnicode()));
}
glyphs.set(idx, newGlyph);
}
public void substituteOneToMany(OpenTypeFontTableReader tableReader, int[] substGlyphIds) {
//sequence length shall be at least 1
int substCode = substGlyphIds[0];
Glyph oldGlyph = glyphs.get(idx);
Glyph glyph = tableReader.getGlyph(substCode);
glyphs.set(idx, glyph);
if (substGlyphIds.length > 1) {
List additionalGlyphs = new ArrayList<>(substGlyphIds.length - 1);
for (int i = 1; i < substGlyphIds.length; ++i) {
substCode = substGlyphIds[i];
glyph = tableReader.getGlyph(substCode);
additionalGlyphs.add(glyph);
}
addAllGlyphs(idx + 1, additionalGlyphs);
if (null != actualText) {
if (null == actualText.get(idx)) {
actualText.set(idx, new ActualText(oldGlyph.getUnicodeString()));
}
for (int i = 0; i < additionalGlyphs.size(); i++) {
this.actualText.set(idx + 1 + i, actualText.get(idx));
}
}
idx += substGlyphIds.length - 1;
end += substGlyphIds.length - 1;
}
}
public GlyphLine filter(IGlyphLineFilter filter) {
boolean anythingFiltered = false;
List filteredGlyphs = new ArrayList<>(end - start);
List filteredActualText = actualText != null ? new ArrayList(end - start) : null;
for (int i = start; i < end; i++) {
if (filter.accept(glyphs.get(i))) {
filteredGlyphs.add(glyphs.get(i));
if (filteredActualText != null) {
filteredActualText.add(actualText.get(i));
}
} else {
anythingFiltered = true;
}
}
if (anythingFiltered) {
return new GlyphLine(filteredGlyphs, filteredActualText, 0, filteredGlyphs.size());
} else {
return this;
}
}
public void setActualText(int left, int right, String text) {
if (this.actualText == null) {
this.actualText = new ArrayList<>(glyphs.size());
for (int i = 0; i < glyphs.size(); i++)
this.actualText.add(null);
}
ActualText actualText = new ActualText(text);
for (int i = left; i < right; i++) {
this.actualText.set(i, actualText);
}
}
public Iterator iterator() {
return new ActualTextIterator(this);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
GlyphLine other = (GlyphLine) obj;
if (end - start != other.end - other.start) {
return false;
}
if (actualText == null && other.actualText != null || actualText != null && other.actualText == null) {
return false;
}
for (int i = start; i < end; i++) {
int otherPos = other.start + i - start;
Glyph myGlyph = get(i);
Glyph otherGlyph = other.get(otherPos);
if (myGlyph == null && otherGlyph != null || myGlyph != null && !myGlyph.equals(otherGlyph)) {
return false;
}
ActualText myAT = actualText == null ? null : actualText.get(i);
ActualText otherAT = other.actualText == null ? null : other.actualText.get(otherPos);
if (myAT == null && otherAT != null || myAT != null && !myAT.equals(otherAT)) {
return false;
}
}
return true;
}
@Override
public int hashCode() {
int result = 0;
result = 31*result + start;
result = 31*result + end;
for (int i = start; i < end; i++) {
result = 31*result + glyphs.get(i).hashCode();
}
if (null != actualText) {
for (int i = start; i < end; i++) {
result = 31*result;
if (null != actualText.get(i)) {
result += actualText.get(i).hashCode();
}
}
}
return result;
}
private void removeGlyph(int index) {
glyphs.remove(index);
if (actualText != null) {
actualText.remove(index);
}
}
private void addAllGlyphs(int index, List additionalGlyphs) {
glyphs.addAll(index, additionalGlyphs);
if (actualText != null) {
for (int i = 0; i < additionalGlyphs.size(); i++) {
this.actualText.add(index, null);
}
}
}
public interface IGlyphLineFilter {
boolean accept(Glyph glyph);
}
public static class GlyphLinePart {
public int start;
public int end;
// Might be null if it's not necessary
public String actualText;
public boolean reversed;
public GlyphLinePart(int start, int end) {
this(start, end, null);
}
public GlyphLinePart(int start, int end, String actualText) {
this.start = start;
this.end = end;
this.actualText = actualText;
}
public GlyphLinePart setReversed(boolean reversed) {
this.reversed = reversed;
return this;
}
}
protected static class ActualText {
public String value;
public ActualText(String value) {
this.value = value;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
ActualText other = (ActualText) obj;
return value == null && other.value == null || value.equals(other.value);
}
@Override
public int hashCode() {
return 31*value.hashCode();
}
}
}
