com.vladsch.flexmark.util.sequence.BasedOptionsSequence Maven / Gradle / Ivy

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package com.vladsch.flexmark.util.sequence;

import com.vladsch.flexmark.util.data.DataHolder;
import com.vladsch.flexmark.util.data.DataKeyBase;
import com.vladsch.flexmark.util.misc.BitFieldSet;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.stream.IntStream;

/**
 * A BasedSequence with offset tracking that follows editing operations and subSequence() chopping as best as it can
 * 
 * a subSequence() returns a sub-sequence from the original base sequence with updated offset tracking
 */
final public class BasedOptionsSequence implements CharSequence, BasedOptionsHolder {
    final private @NotNull CharSequence chars;
    final private int optionFlags;
    final private @Nullable DataHolder options;

    private BasedOptionsSequence(@NotNull CharSequence chars, int optionFlags, @Nullable DataHolder options) {
        this.chars = chars;
        this.optionFlags = optionFlags & ~(options == null || SEGMENTED_STATS.get(options) == null ? F_COLLECT_SEGMENTED_STATS : 0);
        this.options = options;
    }

    @Override
    public int getOptionFlags() {
        return optionFlags;
    }

    @Override
    public boolean allOptions(int options) {
        return (optionFlags & options) == options;
    }

    @Override
    public boolean anyOptions(int options) {
        return (optionFlags & options) != 0;
    }

    @Override
    public  T getOption(DataKeyBase dataKey) {
        return dataKey.get(options);
    }

    @Nullable
    @Override
    public DataHolder getOptions() {
        return options;
    }

    @Override
    public int length() {return chars.length();}

    @Override
    public char charAt(int index) {return chars.charAt(index);}

    @Override
    public CharSequence subSequence(int start, int end) {return chars.subSequence(start, end);}

    @Override
    public String toString() {return chars.toString();}

    @Override
    public IntStream chars() {return chars.chars();}

    @Override
    public IntStream codePoints() {return chars.codePoints();}

    @Override
    @SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
    public boolean equals(Object o) {
        return chars.equals(o);
    }

    @Override
    public int hashCode() {
        return chars.hashCode();
    }

    public static BasedOptionsSequence of(@NotNull CharSequence chars, BitFieldSet optionFlags) {
        return new BasedOptionsSequence(chars, optionFlags.toInt(), null);
    }

    public static BasedOptionsSequence of(@NotNull CharSequence chars, int optionFlags) {
        return new BasedOptionsSequence(chars, optionFlags, null);
    }

    public static BasedOptionsSequence of(@NotNull CharSequence chars, BitFieldSet optionFlags, @Nullable DataHolder options) {
        return new BasedOptionsSequence(chars, optionFlags.toInt(), options);
    }

    public static BasedOptionsSequence of(@NotNull CharSequence chars, int optionFlags, @Nullable DataHolder options) {
        return new BasedOptionsSequence(chars, optionFlags, options);
    }
}