mirror of git://gcc.gnu.org/git/gcc.git
432 lines
13 KiB
Java
432 lines
13 KiB
Java
/* AttributedString.java -- Models text with attributes
|
|
Copyright (C) 1998, 1999 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA.
|
|
|
|
As a special exception, if you link this library with other files to
|
|
produce an executable, this library does not by itself cause the
|
|
resulting executable to be covered by the GNU General Public License.
|
|
This exception does not however invalidate any other reasons why the
|
|
executable file might be covered by the GNU General Public License. */
|
|
|
|
|
|
package java.text;
|
|
|
|
import java.util.Iterator;
|
|
import java.util.Hashtable;
|
|
import java.util.HashSet;
|
|
import java.util.Map;
|
|
import java.util.Set;
|
|
|
|
/**
|
|
* This class models a <code>String</code> with attributes over various
|
|
* subranges of the string. It allows applications to access this
|
|
* information via the <code>AttributedCharcterIterator</code> interface.
|
|
*
|
|
* @version 0.0
|
|
*
|
|
* @author Aaron M. Renn (arenn@urbanophile.com)
|
|
*/
|
|
public class AttributedString
|
|
{
|
|
|
|
/*************************************************************************/
|
|
|
|
/*
|
|
* Inner Classes
|
|
*/
|
|
|
|
/**
|
|
* This class contains the attributes and ranges of text over which
|
|
* that attributes apply.
|
|
*/
|
|
final class AttributeRange
|
|
{
|
|
|
|
/*
|
|
* Instance Variables
|
|
*/
|
|
|
|
/**
|
|
* A Map of the attributes
|
|
*/
|
|
Map attribs;
|
|
|
|
/**
|
|
* The beginning index of the attributes
|
|
*/
|
|
int begin_index;
|
|
|
|
/**
|
|
* The ending index of the attributes
|
|
*/
|
|
int end_index;
|
|
|
|
/*************************************************************************/
|
|
|
|
/*
|
|
* Constructors
|
|
*/
|
|
|
|
AttributeRange(Map attribs, int begin_index, int end_index)
|
|
{
|
|
this.attribs = attribs;
|
|
this.begin_index = begin_index;
|
|
this.end_index = end_index;
|
|
}
|
|
|
|
} // Inner class AttributeRange
|
|
|
|
/*************************************************************************/
|
|
|
|
/*
|
|
* Instance Variables
|
|
*/
|
|
|
|
/**
|
|
* This object holds the string we are representing.
|
|
*/
|
|
private StringCharacterIterator sci;
|
|
|
|
/**
|
|
* This is the attribute information
|
|
*/
|
|
private AttributeRange[] attribs;
|
|
|
|
/*************************************************************************/
|
|
|
|
/*
|
|
* Constructors
|
|
*/
|
|
|
|
/**
|
|
* This method initializes a new instance of <code>AttributedString</code>
|
|
* that represents the specified <code>String</code> with no attributes.
|
|
*
|
|
* @param str The <code>String</code> to be attributed.
|
|
*/
|
|
public
|
|
AttributedString(String str)
|
|
{
|
|
sci = new StringCharacterIterator(str);
|
|
attribs = new AttributeRange[0];
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method initializes a new instance of <code>AttributedString</code>
|
|
* that represents that specified <code>String</code> with the specified
|
|
* attributes over the entire length of the <code>String</code>.
|
|
*
|
|
* @param str The <code>String</code> to be attributed.
|
|
* @param attributes The attribute list.
|
|
*/
|
|
public
|
|
AttributedString(String str, Map attributes)
|
|
{
|
|
this(str);
|
|
|
|
attribs = new AttributeRange[1];
|
|
attribs[0] = new AttributeRange(attributes, 0, str.length());
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method initializes a new instance of <code>AttributedString</code>
|
|
* that will use the text and attribute information from the specified
|
|
* <code>AttributedCharacterIterator</code>.
|
|
*
|
|
* @param aci The <code>AttributedCharacterIterator</code> containing the text and attribute information.
|
|
*/
|
|
public
|
|
AttributedString(AttributedCharacterIterator aci)
|
|
{
|
|
this(aci, aci.getBeginIndex(), aci.getEndIndex(), null);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method initializes a new instance of <code>AttributedString</code>
|
|
* that will use the text and attribute information from the specified
|
|
* subrange of the specified <code>AttributedCharacterIterator</code>.
|
|
*
|
|
* @param aci The <code>AttributedCharacterIterator</code> containing the text and attribute information.
|
|
* @param begin_index The beginning index of the text subrange.
|
|
* @param end_index The ending index of the text subrange.
|
|
*/
|
|
public
|
|
AttributedString(AttributedCharacterIterator aci, int begin_index,
|
|
int end_index)
|
|
{
|
|
this(aci, begin_index, end_index, null);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method initializes a new instance of <code>AttributedString</code>
|
|
* that will use the text and attribute information from the specified
|
|
* subrange of the specified <code>AttributedCharacterIterator</code>.
|
|
* Only attributes from the source iterator that are present in the
|
|
* specified array of attributes will be included in the attribute list
|
|
* for this object.
|
|
*
|
|
* @param aci The <code>AttributedCharacterIterator</code> containing the text and attribute information.
|
|
* @param begin_index The beginning index of the text subrange.
|
|
* @param end_index The ending index of the text subrange.
|
|
* @param attributes A list of attributes to include from the iterator, or <code>null</code> to include all attributes.
|
|
*/
|
|
public
|
|
AttributedString(AttributedCharacterIterator aci, int begin_index,
|
|
int end_index, AttributedCharacterIterator.Attribute[] attributes)
|
|
{
|
|
// Validate some arguments
|
|
if ((begin_index < 0) || (end_index < begin_index))
|
|
throw new IllegalArgumentException("Bad index values");
|
|
|
|
StringBuffer sb = new StringBuffer("");
|
|
|
|
// Get the valid attribute list
|
|
Set all_attribs = aci.getAllAttributeKeys();
|
|
if (attributes != null)
|
|
{
|
|
Set valid_attribs = new HashSet();
|
|
Iterator iter = all_attribs.iterator();
|
|
while (iter.hasNext())
|
|
{
|
|
Object obj = iter.next();
|
|
|
|
int i;
|
|
for (i = 0; i < attributes.length; i++)
|
|
if (obj.equals(attributes[0]))
|
|
break;
|
|
|
|
if (i == attributes.length)
|
|
continue;
|
|
|
|
valid_attribs.add(obj);
|
|
}
|
|
|
|
all_attribs = valid_attribs;
|
|
}
|
|
|
|
// Loop through and extract the attributes
|
|
char c = aci.setIndex(begin_index);
|
|
|
|
do
|
|
{
|
|
sb.append(c);
|
|
|
|
Iterator iter = all_attribs.iterator();
|
|
while(iter.hasNext())
|
|
{
|
|
Object obj = iter.next();
|
|
|
|
// What should we do if this is not true?
|
|
if (!(obj instanceof AttributedCharacterIterator.Attribute))
|
|
continue;
|
|
|
|
AttributedCharacterIterator.Attribute attrib =
|
|
(AttributedCharacterIterator.Attribute)obj;
|
|
|
|
// Make sure the attribute is defined.
|
|
int rl = aci.getRunLimit(attrib);
|
|
if (rl == -1)
|
|
continue;
|
|
if (rl > end_index)
|
|
rl = end_index;
|
|
rl -= begin_index;
|
|
|
|
// Check to see if we already processed this one
|
|
int rs = aci.getRunStart(attrib);
|
|
if ((rs < aci.getIndex()) && (aci.getIndex() != begin_index))
|
|
continue;
|
|
|
|
// If the attribute run starts before the beginning index, we
|
|
// need to junk it if it is an Annotation.
|
|
Object attrib_obj = aci.getAttribute(attrib);
|
|
if (rs < begin_index)
|
|
{
|
|
if (attrib_obj instanceof Annotation)
|
|
continue;
|
|
|
|
rs = begin_index;
|
|
}
|
|
else
|
|
{
|
|
rs -= begin_index;
|
|
}
|
|
|
|
// Create a map object. Yes this will only contain one attribute
|
|
Map new_map = new Hashtable();
|
|
new_map.put(attrib, attrib_obj);
|
|
|
|
// Add it to the attribute list. Yes this is a bad way to do things.
|
|
AttributeRange[] new_list = new AttributeRange[attribs.length + 1];
|
|
System.arraycopy(attribs, 0, new_list, 0, attribs.length);
|
|
attribs = new_list;
|
|
attribs[attribs.length - 1] = new AttributeRange(new_map, rs, rl);
|
|
}
|
|
|
|
c = aci.next();
|
|
}
|
|
while(c != CharacterIterator.DONE);
|
|
|
|
sci = new StringCharacterIterator(sb.toString());
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/*
|
|
* Instance Methods
|
|
*/
|
|
|
|
/**
|
|
* This method adds a new attribute that will cover the entire string.
|
|
*
|
|
* @param attrib The attribute to add.
|
|
* @param value The value of the attribute.
|
|
*/
|
|
public void
|
|
addAttribute(AttributedCharacterIterator.Attribute attrib, Object value)
|
|
{
|
|
addAttribute(attrib, value, 0, sci.getEndIndex() - 1);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method adds a new attribute that will cover the specified subrange
|
|
* of the string.
|
|
*
|
|
* @param attrib The attribute to add.
|
|
* @param value The value of the attribute.
|
|
* @param begin_index The beginning index of the subrange.
|
|
* @param end_index The ending index of the subrange.
|
|
*
|
|
* @exception IllegalArgumentException If attribute is <code>null</code> or the subrange is not valid.
|
|
*/
|
|
public void
|
|
addAttribute(AttributedCharacterIterator.Attribute attrib, Object value,
|
|
int begin_index, int end_index)
|
|
{
|
|
if (attrib == null)
|
|
throw new IllegalArgumentException("null attribute");
|
|
|
|
Hashtable ht = new Hashtable();
|
|
ht.put(attrib, value);
|
|
|
|
addAttributes(ht, begin_index, end_index);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method adds all of the attributes in the specified list to the
|
|
* specified subrange of the string.
|
|
*
|
|
* @param attributes The list of attributes.
|
|
* @param begin_index The beginning index.
|
|
* @param end_index The ending index
|
|
*
|
|
* @param IllegalArgumentException If the list is <code>null</code> or the subrange is not valid.
|
|
*/
|
|
public void
|
|
addAttributes(Map attributes, int begin_index, int end_index)
|
|
{
|
|
if (attributes == null)
|
|
throw new IllegalArgumentException("null attribute");
|
|
|
|
if ((begin_index < 0) || (end_index > sci.getEndIndex()) ||
|
|
(end_index < begin_index))
|
|
throw new IllegalArgumentException("bad range");
|
|
|
|
AttributeRange[] new_list = new AttributeRange[attribs.length + 1];
|
|
System.arraycopy(attribs, 0, new_list, 0, attribs.length);
|
|
attribs = new_list;
|
|
attribs[attribs.length - 1] = new AttributeRange(attributes, begin_index,
|
|
end_index);
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns an <code>AttributedCharacterIterator</code> that
|
|
* will iterate over the entire string.
|
|
*
|
|
* @return An <code>AttributedCharacterIterator</code> for the entire string.
|
|
*/
|
|
public AttributedCharacterIterator
|
|
getIterator()
|
|
{
|
|
return(new AttributedStringIterator(sci, attribs, 0, sci.getEndIndex() - 1,
|
|
null));
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns an <code>AttributedCharacterIterator</code> that
|
|
* will iterate over the entire string. This iterator will return information
|
|
* about the list of attributes in the specified array. Attributes not in
|
|
* the array may or may not be returned by the iterator. If the specified
|
|
* array is <code>null</code>, all attributes will be returned.
|
|
*
|
|
* @param attributes A list of attributes to include in the returned iterator.
|
|
*
|
|
* @return An <code>AttributedCharacterIterator</code> for this string.
|
|
*/
|
|
public AttributedCharacterIterator
|
|
getIterator(AttributedCharacterIterator.Attribute[] attributes)
|
|
{
|
|
return(getIterator(attributes, 0, sci.getEndIndex() - 1));
|
|
}
|
|
|
|
/*************************************************************************/
|
|
|
|
/**
|
|
* This method returns an <code>AttributedCharacterIterator</code> that
|
|
* will iterate over the specified subrange. This iterator will return information
|
|
* about the list of attributes in the specified array. Attributes not in
|
|
* the array may or may not be returned by the iterator. If the specified
|
|
* array is <code>null</code>, all attributes will be returned.
|
|
*
|
|
* @param attributes A list of attributes to include in the returned iterator.
|
|
* @param begin_index The beginning index of the subrange.
|
|
* @param end_index The ending index of the subrange.
|
|
*
|
|
* @return An <code>AttributedCharacterIterator</code> for this string.
|
|
*/
|
|
public AttributedCharacterIterator
|
|
getIterator(AttributedCharacterIterator.Attribute[] attributes,
|
|
int begin_index, int end_index)
|
|
{
|
|
if ((begin_index < 0) || (end_index > sci.getEndIndex()) ||
|
|
(end_index < begin_index))
|
|
throw new IllegalArgumentException("bad range");
|
|
|
|
return(new AttributedStringIterator(sci, attribs, begin_index, end_index,
|
|
attributes));
|
|
}
|
|
|
|
} // class AttributedString
|
|
|