Examples with TextRegion org.eclipse.xtext.util.TextRegion used on opensource projects

Example 16 with TextRegion

use of org.eclipse.xtext.util.TextRegion in project xtext-core by eclipse.

the class TokenRegionProviderTest method testTokenSplit.

@Test
public void testTokenSplit() throws Exception {
    String model = " a b ";
    ITextRegion tokenRegion = tokenRegionProvider.getTokenRegion(model, new TextRegion(2, 1));
    assertEquals(2, tokenRegion.getOffset());
    assertEquals(1, tokenRegion.getLength());
}

Example 17 with TextRegion

use of org.eclipse.xtext.util.TextRegion in project xtext-core by eclipse.

the class TokenRegionProviderTest method testTokenMerge_1.

@Test
public void testTokenMerge_1() throws Exception {
    String model = " ab ";
    ITextRegion tokenRegion = tokenRegionProvider.getTokenRegion(model, new TextRegion(2, 0));
    assertEquals(1, tokenRegion.getOffset());
    assertEquals(2, tokenRegion.getLength());
}

Example 18 with TextRegion

use of org.eclipse.xtext.util.TextRegion in project xtext-core by eclipse.

the class TokenRegionProviderTest method testTokenSplit_1.

@Test
public void testTokenSplit_1() throws Exception {
    String model = " axb ";
    ITextRegion tokenRegion = tokenRegionProvider.getTokenRegion(model, new TextRegion(2, 1));
    assertEquals(1, tokenRegion.getOffset());
    assertEquals(3, tokenRegion.getLength());
}

Example 19 with TextRegion

use of org.eclipse.xtext.util.TextRegion in project xtext-core by eclipse.

the class TokenRegionProvider method getTokenReplaceRegion.

public ReplaceRegion getTokenReplaceRegion(String changedText, ReplaceRegion replaceRegion) {
    int lengthDelta = replaceRegion.getText().length() - replaceRegion.getLength();
    ITextRegion tokenRegion = getTokenRegion(changedText, new TextRegion(replaceRegion.getOffset(), replaceRegion.getText().length()));
    if (tokenRegion.getOffset() == replaceRegion.getOffset() && tokenRegion.getLength() == replaceRegion.getText().length())
        return replaceRegion;
    else
        return new ReplaceRegion(tokenRegion.getOffset(), tokenRegion.getLength() - lengthDelta, changedText.substring(tokenRegion.getOffset(), tokenRegion.getOffset() + tokenRegion.getLength()));
}

Example 20 with TextRegion

use of org.eclipse.xtext.util.TextRegion in project xtext-core by eclipse.

the class TokenRegionProvider method getTokenRegion.

public ITextRegion getTokenRegion(String text, ITextRegion region) {
    Lexer lexer = lexerProvider.get();
    lexer.setCharStream(new ANTLRStringStream(text));
    int currentStart = 0;
    int currentEnd = 0;
    CommonToken nextToken = (CommonToken) lexer.nextToken();
    int regionStart = region.getOffset();
    int regionEnd = regionStart + region.getLength();
    while (nextToken != Token.EOF_TOKEN && currentEnd <= regionStart) {
        currentStart = nextToken.getStartIndex();
        currentEnd = nextToken.getStopIndex() + 1;
        nextToken = (CommonToken) lexer.nextToken();
    }
    // nextToken is either EOF or the first token that follows the start of the given region
    while (nextToken != Token.EOF_TOKEN && currentEnd < regionEnd) {
        currentEnd = nextToken.getStopIndex() + 1;
        nextToken = (CommonToken) lexer.nextToken();
    }
    if (currentStart != regionStart || currentEnd != regionEnd)
        return new TextRegion(currentStart, currentEnd - currentStart);
    else
        return region;
}