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package org.eclipse.jface.text;
/*
* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved.
*/
import org.eclipse.swt.events.VerifyEvent;
/**
* Represents a text modification as a document replace command. The text modification is given
* as a <code>VerifyEvent</code> and translated into a document replace command relative
* to a given offset. A document command can also be used to initialize a given <code>VerifyEvent</code>.
*/
public final class DocumentCommand {
/** Must the command be updated */
public boolean doit= false;
/** The offset of the command */
public int offset;
/** The length of the command */
public int length;
/** The text to be inserted */
public String text;
/**
* Creates a new document command.
*/
DocumentCommand() {
}
/**
* Translates a verify event into a document replace command using the given offset.
*
* @param event the event to be translated
* @param offset the offset used for the translation
*/
void setEvent(VerifyEvent event, int offset) {
doit= true;
text= event.text;
this.offset= event.start;
length= event.end - event.start;
if (length < 0) {
this.offset += length;
length= -length;
}
this.offset += offset;
}
/**
* Fills the given verify event with the replace text and the doit
* flag of this document command. Returns whether the document command
* covers the same range as the verify event considering the given offset.
*
* @param event the event to be changed
* @param offset to be considered for range comparison
* @return <code>true</code> if this command and the event cover the same range
*/
boolean fillEvent(VerifyEvent event, int offset) {
int start= this.offset - offset;
event.text= text;
event.doit= (start == event.start && start + length == event.end) && doit;
return event.doit;
}
}
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