mirror of https://github.com/apache/poi.git
Font support from Yegor, from Bug #35972
git-svn-id: https://svn.apache.org/repos/asf/jakarta/poi/trunk@353759 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch
parent
2f71ef509c
commit
0d18643331
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/* ====================================================================
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Copyright 2002-2004 Apache Software Foundation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hslf.record;
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import org.apache.poi.util.LittleEndian;
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import java.io.*;
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import java.util.*;
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/**
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* <code>FontCollection</code> ia a container that holds information
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* about all the fonts in the presentation.
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*
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* @author Yegor Kozlov
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*/
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public class FontCollection extends RecordContainer {
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private List fonts;
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private Record[] _children;
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private byte[] _header;
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protected FontCollection(byte[] source, int start, int len) {
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// Grab the header
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_header = new byte[8];
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System.arraycopy(source,start,_header,0,8);
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_children = Record.findChildRecords(source,start+8,len-8);
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// Save font names into <code>List</code>
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fonts = new ArrayList();
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for (int i = 0; i < _children.length; i++){
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FontEntityAtom atom = (FontEntityAtom)_children[i];
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fonts.add(atom.getFontName());
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}
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}
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public long getRecordType() {
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return RecordTypes.FontCollection.typeID;
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}
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public Record[] getChildRecords() {
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return _children;
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}
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/**
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* Write the contents of the record back, so it can be written
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* to disk
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*/
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public void writeOut(OutputStream out) throws IOException {
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writeOut(_header[0],_header[1],getRecordType(),_children,out);
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}
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/**
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* Add font with the specified name to the font collection.
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* If the font is already present return its index.
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* @param name of the font
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* @return zero based index of the font in the collection
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*/
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public int addFont(String name) {
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for (int i = 0; i < fonts.size(); i++) {
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if(fonts.get(i).equals(name)){
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//if the font is already present return its index
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return i;
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}
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}
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FontEntityAtom fnt = new FontEntityAtom();
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fnt.setFontIndex(fonts.size() << 4);
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fnt.setFontName(name);
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fonts.add(name);
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// append new child to the end
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_children = appendChildRecord(fnt,_children);
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return fonts.size()-1; //the added font is the last in the list
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}
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}
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@ -0,0 +1,141 @@
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/* ====================================================================
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Copyright 2002-2004 Apache Software Foundation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hslf.record;
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import org.apache.poi.util.LittleEndian;
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import org.apache.poi.util.StringUtil;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.UnsupportedEncodingException;
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/**
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* This atom corresponds exactly to a Windows Logical Font (LOGFONT) structure.
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* It keeps all the information needed to define the attributes of a font,
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* such as height, width, etc. For more information, consult the
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* Windows API Programmer's reference.
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*
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* @author Yegor Kozlov
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*/
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public class FontEntityAtom extends RecordAtom {
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/**
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* record header
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*/
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private byte[] _header;
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/**
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* record data
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*/
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private byte[] _recdata;
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/**
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* Build an instance of <code>FontEntityAtom</code> from on-disk data
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*/
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protected FontEntityAtom(byte[] source, int start, int len) {
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// Get the header
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_header = new byte[8];
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System.arraycopy(source,start,_header,0,8);
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// Grab the record data
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_recdata = new byte[len-8];
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System.arraycopy(source,start+8,_recdata,0,len-8);
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}
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/**
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* Create a new instance of <code>FontEntityAtom</code>
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*/
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protected FontEntityAtom() {
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_recdata = new byte[68];
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_header = new byte[8];
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LittleEndian.putShort(_header, 2, (short)getRecordType());
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LittleEndian.putInt(_header, 4, _recdata.length);
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}
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public long getRecordType() {
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return RecordTypes.FontEntityAtom.typeID;
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}
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/**
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* A null-terminated string that specifies the typeface name of the font.
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* The length of this string must not exceed 32 characters
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* including the null terminator.
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* @return font name
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*/
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public String getFontName(){
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String name = null;
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try {
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int i = 0;
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while(i < 64){
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//loop until find null-terminated end of the font name
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if(_recdata[i] == 0 && _recdata[i + 1] == 0) {
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name = new String(_recdata, 0, i, "UTF-16LE");
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break;
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}
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i += 2;
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}
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} catch (UnsupportedEncodingException e){
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throw new RuntimeException(e.getMessage(), e);
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}
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return name;
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}
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/**
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* Set the name of the font.
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* The length of this string must not exceed 32 characters
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* including the null terminator.
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* Will be converted to null-terminated if not already
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* @param name of the font
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*/
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public void setFontName(String name){
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// Add a null termination if required
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if(! name.endsWith("\000")) {
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name = name + "\000";
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}
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// Ensure it's not now too long
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if(name.length() > 32) {
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throw new RuntimeException("The length of the font name, including null termination, must not exceed 32 characters");
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}
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// Everything's happy, so save the name
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try {
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byte[] bytes = name.getBytes("UTF-16LE");
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System.arraycopy(bytes, 0, _recdata, 0, bytes.length);
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} catch (UnsupportedEncodingException e){
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throw new RuntimeException(e.getMessage(), e);
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}
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}
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protected void setFontIndex(int idx){
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LittleEndian.putShort(_header, 0, (short)idx);
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}
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protected int getFontIndex(){
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return LittleEndian.getShort(_header, 0);
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}
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/**
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* Write the contents of the record back, so it can be written to disk
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*/
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public void writeOut(OutputStream out) throws IOException {
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out.write(_header);
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out.write(_recdata);
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}
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}
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@ -39,6 +39,17 @@ public abstract class RecordContainer extends Record
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*/
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public boolean isAnAtom() { return false; }
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/**
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* Add a new child record onto a record's list of children, and
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* return the new list.
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*/
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public Record[] appendChildRecord(Record newChild, Record[] children) {
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Record[] r = new Record[children.length + 1];
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System.arraycopy(children,0,r,0,children.length);
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r[r.length-1] = newChild;
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return r;
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}
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/**
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* Write out our header, and our children.
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* @param headerA the first byte of the header
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@ -67,7 +67,7 @@ public class RecordTypes {
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public static final Type NamedShowSlides = new Type(1042,null);
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public static final Type SheetProperties = new Type(1044,null);
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public static final Type List = new Type(2000,null);
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public static final Type FontCollection = new Type(2005,null);
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public static final Type FontCollection = new Type(2005,FontCollection.class);
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public static final Type BookmarkCollection = new Type(2019,null);
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public static final Type SoundCollAtom = new Type(2021,null);
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public static final Type Sound = new Type(2022,null);
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public static final Type TxSIStyleAtom = new Type(4009,null);
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public static final Type TextSpecInfoAtom = new Type(4010,null);
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public static final Type DefaultRulerAtom = new Type(4011,null);
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public static final Type FontEntityAtom = new Type(4023,null);
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public static final Type FontEntityAtom = new Type(4023,FontEntityAtom.class);
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public static final Type FontEmbeddedData = new Type(4024,null);
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public static final Type CString = new Type(4026,null);
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public static final Type MetaFile = new Type(4033,null);
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