org.eclipse.mylyn.internal.wikitext.commonmark.inlines.InlinesSubstitution.java Source code

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Here is the source code for org.eclipse.mylyn.internal.wikitext.commonmark.inlines.InlinesSubstitution.java

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/*******************************************************************************
 * Copyright (c) 2015 David Green.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     David Green - initial API and implementation
 *******************************************************************************/

package org.eclipse.mylyn.internal.wikitext.commonmark.inlines;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.List;

import com.google.common.collect.ImmutableList;

class InlinesSubstitution {

    private final Inline first;

    private final Inline last;

    private final List<Inline> substitution;

    public InlinesSubstitution(Inline first, Inline last, List<Inline> substitution) {
        this.first = checkNotNull(first);
        this.last = checkNotNull(last);
        this.substitution = ImmutableList.copyOf(substitution);
    }

    public List<Inline> apply(List<Inline> inlines) {
        ImmutableList.Builder<Inline> builder = ImmutableList.builder();

        boolean inReplacementSegment = false;
        for (Inline inline : inlines) {
            if (inline == first) {
                inReplacementSegment = true;
                builder.addAll(substitution);
            }
            if (!inReplacementSegment) {
                builder.add(inline);
            }
            if (inReplacementSegment && inline == last) {
                inReplacementSegment = false;
            }
        }
        return builder.build();
    }
}