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EmphasisDelimiterProcessor.java
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EmphasisDelimiterProcessor.java
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package com.vladsch.flexmark.parser.core.delimiter;
import com.vladsch.flexmark.ast.Emphasis;
import com.vladsch.flexmark.ast.StrongEmphasis;
import com.vladsch.flexmark.parser.InlineParser;
import com.vladsch.flexmark.parser.delimiter.DelimiterProcessor;
import com.vladsch.flexmark.parser.delimiter.DelimiterRun;
import com.vladsch.flexmark.util.ast.DelimitedNode;
import com.vladsch.flexmark.util.ast.Node;
import com.vladsch.flexmark.util.misc.Utils;
import com.vladsch.flexmark.util.sequence.BasedSequence;
public abstract class EmphasisDelimiterProcessor implements DelimiterProcessor {
final private char delimiterChar;
final private int multipleUse;
protected EmphasisDelimiterProcessor(char delimiterChar, boolean strongWrapsEmphasis) {
this.delimiterChar = delimiterChar;
this.multipleUse = strongWrapsEmphasis ? 1 : 2;
}
@Override
public char getOpeningCharacter() {
return delimiterChar;
}
@Override
public char getClosingCharacter() {
return delimiterChar;
}
@Override
public int getMinLength() {
return 1;
}
@Override
public boolean canBeOpener(String before, String after, boolean leftFlanking, boolean rightFlanking, boolean beforeIsPunctuation, boolean afterIsPunctuation, boolean beforeIsWhitespace, boolean afterIsWhiteSpace) {
return leftFlanking;
}
@Override
public boolean canBeCloser(String before, String after, boolean leftFlanking, boolean rightFlanking, boolean beforeIsPunctuation, boolean afterIsPunctuation, boolean beforeIsWhitespace, boolean afterIsWhiteSpace) {
return rightFlanking;
}
@Override
public boolean skipNonOpenerCloser() {
return false;
}
@Override
public Node unmatchedDelimiterNode(InlineParser inlineParser, DelimiterRun delimiter) {
return null;
}
@Override
public int getDelimiterUse(DelimiterRun opener, DelimiterRun closer) {
// "multiple of 3" rule for internal delimiter runs
if ((opener.canClose() || closer.canOpen()) && (opener.length() + closer.length()) % 3 == 0) {
return 0;
}
// calculate actual number of delimiters used from this closer
if (opener.length() < 3 || closer.length() < 3) {
return Utils.min(closer.length(), opener.length());
} else {
// default to latest spec
return closer.length() % 2 == 0 ? 2 : multipleUse;
}
}
@Override
public void process(Delimiter opener, Delimiter closer, int delimitersUsed) {
DelimitedNode emphasis = delimitersUsed == 1
? new Emphasis(opener.getTailChars(delimitersUsed), BasedSequence.NULL, closer.getLeadChars(delimitersUsed))
: new StrongEmphasis(opener.getTailChars(delimitersUsed), BasedSequence.NULL, closer.getLeadChars(delimitersUsed));
opener.moveNodesBetweenDelimitersTo(emphasis, closer);
}
}