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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 2005-08-02 17:16:20 +00:00
parent 9f2ba8ec8d
commit 40f7c70483
4 changed files with 246 additions and 2 deletions
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92
src/scratchpad/src/org/apache/poi/hslf/record/FontCollection.java Normal file
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@ -0,0 +1,92 @@
/* ====================================================================
Copyright 2002-2004 Apache Software Foundation
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 org.apache.poi.hslf.record;
import org.apache.poi.util.LittleEndian;
import java.io.*;
import java.util.*;
/**
* <code>FontCollection</code> ia a container that holds information
* about all the fonts in the presentation.
*
* @author Yegor Kozlov
*/
public class FontCollection extends RecordContainer {
private List fonts;
private Record[] _children;
private byte[] _header;
protected FontCollection(byte[] source, int start, int len) {
// Grab the header
_header = new byte[8];
System.arraycopy(source,start,_header,0,8);
_children = Record.findChildRecords(source,start+8,len-8);
// Save font names into <code>List</code>
fonts = new ArrayList();
for (int i = 0; i < _children.length; i++){
FontEntityAtom atom = (FontEntityAtom)_children[i];
fonts.add(atom.getFontName());
}
}
public long getRecordType() {
return RecordTypes.FontCollection.typeID;
}
public Record[] getChildRecords() {
return _children;
}
/**
* Write the contents of the record back, so it can be written
* to disk
*/
public void writeOut(OutputStream out) throws IOException {
writeOut(_header[0],_header[1],getRecordType(),_children,out);
}
/**
* Add font with the specified name to the font collection.
* If the font is already present return its index.
* @param name of the font
* @return zero based index of the font in the collection
*/
public int addFont(String name) {
for (int i = 0; i < fonts.size(); i++) {
if(fonts.get(i).equals(name)){
//if the font is already present return its index
return i;
}
}
FontEntityAtom fnt = new FontEntityAtom();
fnt.setFontIndex(fonts.size() << 4);
fnt.setFontName(name);
fonts.add(name);
// append new child to the end
_children = appendChildRecord(fnt,_children);
return fonts.size()-1; //the added font is the last in the list
}
}

141
src/scratchpad/src/org/apache/poi/hslf/record/FontEntityAtom.java Normal file
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@ -0,0 +1,141 @@
/* ====================================================================
Copyright 2002-2004 Apache Software Foundation
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 org.apache.poi.hslf.record;
import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.StringUtil;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
/**
* This atom corresponds exactly to a Windows Logical Font (LOGFONT) structure.
* It keeps all the information needed to define the attributes of a font,
* such as height, width, etc. For more information, consult the
* Windows API Programmer's reference.
*
* @author Yegor Kozlov
*/
public class FontEntityAtom extends RecordAtom {
/**
* record header
*/
private byte[] _header;
/**
* record data
*/
private byte[] _recdata;
/**
* Build an instance of <code>FontEntityAtom</code> from on-disk data
*/
protected FontEntityAtom(byte[] source, int start, int len) {
// Get the header
_header = new byte[8];
System.arraycopy(source,start,_header,0,8);
// Grab the record data
_recdata = new byte[len-8];
System.arraycopy(source,start+8,_recdata,0,len-8);
}
/**
* Create a new instance of <code>FontEntityAtom</code>
*/
protected FontEntityAtom() {
_recdata = new byte[68];
_header = new byte[8];
LittleEndian.putShort(_header, 2, (short)getRecordType());
LittleEndian.putInt(_header, 4, _recdata.length);
}
public long getRecordType() {
return RecordTypes.FontEntityAtom.typeID;
}
/**
* A null-terminated string that specifies the typeface name of the font.
* The length of this string must not exceed 32 characters
* including the null terminator.
* @return font name
*/
public String getFontName(){
String name = null;
try {
int i = 0;
while(i < 64){
//loop until find null-terminated end of the font name
if(_recdata[i] == 0 && _recdata[i + 1] == 0) {
name = new String(_recdata, 0, i, "UTF-16LE");
break;
}
i += 2;
}
} catch (UnsupportedEncodingException e){
throw new RuntimeException(e.getMessage(), e);
}
return name;
}
/**
* Set the name of the font.
* The length of this string must not exceed 32 characters
* including the null terminator.
* Will be converted to null-terminated if not already
* @param name of the font
*/
public void setFontName(String name){
// Add a null termination if required
if(! name.endsWith("\000")) {
name = name + "\000";
}
// Ensure it's not now too long
if(name.length() > 32) {
throw new RuntimeException("The length of the font name, including null termination, must not exceed 32 characters");
}
// Everything's happy, so save the name
try {
byte[] bytes = name.getBytes("UTF-16LE");
System.arraycopy(bytes, 0, _recdata, 0, bytes.length);
} catch (UnsupportedEncodingException e){
throw new RuntimeException(e.getMessage(), e);
}
}
protected void setFontIndex(int idx){
LittleEndian.putShort(_header, 0, (short)idx);
}
protected int getFontIndex(){
return LittleEndian.getShort(_header, 0);
}
/**
* Write the contents of the record back, so it can be written to disk
*/
public void writeOut(OutputStream out) throws IOException {
out.write(_header);
out.write(_recdata);
}
}

11
src/scratchpad/src/org/apache/poi/hslf/record/RecordContainer.java
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@ -39,6 +39,17 @@ public abstract class RecordContainer extends Record
*/
public boolean isAnAtom() { return false; }
/**
* Add a new child record onto a record's list of children, and
* return the new list.
*/
public Record[] appendChildRecord(Record newChild, Record[] children) {
Record[] r = new Record[children.length + 1];
System.arraycopy(children,0,r,0,children.length);
r[r.length-1] = newChild;
return r;
}
/**
* Write out our header, and our children.
* @param headerA the first byte of the header

4
src/scratchpad/src/org/apache/poi/hslf/record/RecordTypes.java
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@ -67,7 +67,7 @@ public class RecordTypes {
public static final Type NamedShowSlides = new Type(1042,null);
public static final Type SheetProperties = new Type(1044,null);
public static final Type List = new Type(2000,null);
public static final Type FontCollection = new Type(2005,null);
public static final Type FontCollection = new Type(2005,FontCollection.class);
public static final Type BookmarkCollection = new Type(2019,null);
public static final Type SoundCollAtom = new Type(2021,null);
public static final Type Sound = new Type(2022,null);
@ -93,7 +93,7 @@ public class RecordTypes {
public static final Type TxSIStyleAtom = new Type(4009,null);
public static final Type TextSpecInfoAtom = new Type(4010,null);
public static final Type DefaultRulerAtom = new Type(4011,null);
public static final Type FontEntityAtom = new Type(4023,null);
public static final Type FontEntityAtom = new Type(4023,FontEntityAtom.class);
public static final Type FontEmbeddedData = new Type(4024,null);
public static final Type CString = new Type(4026,null);
public static final Type MetaFile = new Type(4033,null);