/*
* @see org.eclipse.jface.text.ITextStore#get(int)
*/
public char get(int offset) {
if (fReplaceList.size() == 0) return fSource.get(offset);
Replace firstReplace = (Replace) fReplaceList.get(0);
Replace lastReplace = (Replace) fReplaceList.get(fReplaceList.size() - 1);
// before
if (offset < firstReplace.newOffset) {
return fSource.get(offset);
// after
} else if (offset >= lastReplace.newOffset + lastReplace.text.length()) {
int delta = getDelta(lastReplace);
return fSource.get(offset - delta);
} else if (ASSERT_SEQUENTIALITY) {
throw new IllegalArgumentException();
} else {
int delta = 0;
for (Iterator i = fReplaceList.iterator(); i.hasNext(); ) {
Replace replace = (Replace) i.next();
if (offset < replace.newOffset) return fSource.get(offset - delta);
else if (offset < replace.newOffset + replace.text.length())
return replace.text.charAt(offset - replace.newOffset);
delta = getDelta(replace);
}
return fSource.get(offset - delta);
}
}
/** Commits all buffered replace commands. */
private void commit() {
if (fReplaceList.size() == 0) return;
StringBuffer buffer = new StringBuffer();
int delta = 0;
for (Iterator i = fReplaceList.iterator(); i.hasNext(); ) {
Replace replace = (Replace) i.next();
int offset = buffer.length() - delta;
buffer.append(fSource.get(offset, replace.offset - offset));
buffer.append(replace.text);
delta = getDelta(replace);
}
int offset = buffer.length() - delta;
buffer.append(fSource.get(offset, fSource.getLength() - offset));
fSource.set(buffer.toString());
fReplaceList.clear();
}
/*
* @see org.eclipse.jface.text.ITextStore#get(int, int)
*/
public String get(int offset, int length) {
if (fReplaceList.size() == 0) return fSource.get(offset, length);
Replace firstReplace = (Replace) fReplaceList.get(0);
Replace lastReplace = (Replace) fReplaceList.get(fReplaceList.size() - 1);
// before
if (offset + length <= firstReplace.newOffset) {
return fSource.get(offset, length);
// after
} else if (offset >= lastReplace.newOffset + lastReplace.text.length()) {
int delta = getDelta(lastReplace);
return fSource.get(offset - delta, length);
} else if (ASSERT_SEQUENTIALITY) {
throw new IllegalArgumentException();
} else {
int delta = 0;
for (Iterator i = fReplaceList.iterator(); i.hasNext(); ) {
Replace replace = (Replace) i.next();
if (offset + length < replace.newOffset) {
return fSource.get(offset - delta, length);
} else if (offset >= replace.newOffset
&& offset + length <= replace.newOffset + replace.text.length()) {
return replace.text.substring(
offset - replace.newOffset, offset - replace.newOffset + length);
} else if (offset >= replace.newOffset + replace.text.length()) {
delta = getDelta(replace);
continue;
} else {
commit();
return fSource.get(offset, length);
}
}
return fSource.get(offset - delta, length);
}
}
/*
* @see org.eclipse.jface.text.ITextStore#replace(int, int, java.lang.String)
*/
public void replace(int offset, int length, String text) {
if (text == null) text = ""; // $NON-NLS-1$
if (fReplaceList.size() == 0) {
fReplaceList.add(new Replace(offset, offset, length, text));
} else {
Replace firstReplace = (Replace) fReplaceList.get(0);
Replace lastReplace = (Replace) fReplaceList.get(fReplaceList.size() - 1);
// backward
if (offset + length <= firstReplace.newOffset) {
int delta = text.length() - length;
if (delta != 0) {
for (Iterator i = fReplaceList.iterator(); i.hasNext(); ) {
Replace replace = (Replace) i.next();
replace.newOffset += delta;
}
}
fReplaceList.add(0, new Replace(offset, offset, length, text));
// forward
} else if (offset >= lastReplace.newOffset + lastReplace.text.length()) {
int delta = getDelta(lastReplace);
fReplaceList.add(new Replace(offset - delta, offset, length, text));
} else if (ASSERT_SEQUENTIALITY) {
throw new IllegalArgumentException();
} else {
commit();
fSource.replace(offset, length, text);
}
}
}
/*
* @see org.eclipse.jface.text.ITextStore#getLength()
*/
public int getLength() {
if (fReplaceList.size() == 0) return fSource.getLength();
Replace lastReplace = (Replace) fReplaceList.get(fReplaceList.size() - 1);
return fSource.getLength() + getDelta(lastReplace);
}
/*
* @see org.eclipse.jface.text.ITextStore#set(java.lang.String)
*/
public void set(String text) {
fSource.set(text);
fReplaceList.clear();
}
