/*
 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
 *
 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
 * derivative works of, display, perform, and distribute the Software and make,
 * use, sell, offer for sale, import, export, have made, and have sold the
 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.oracle.truffle.api.source;

SourceSection with a loaded content. Source.hasCharacters() = true. /**
 * SourceSection with a loaded content. {@link Source#hasCharacters()} = true.
 */
final class SourceSectionLoaded extends SourceSection {

    final int charIndex;
    final int charLength;

    SourceSectionLoaded(Source source, int charIndex, int charLength) {
        super(source);
        this.charIndex = charIndex;
        this.charLength = charLength;
    }

    @Override
    public boolean isAvailable() {
        return true;
    }

    @Override
    public boolean hasLines() {
        return true;
    }

    @Override
    public boolean hasColumns() {
        return true;
    }

    @Override
    public boolean hasCharIndex() {
        return true;
    }

    
Returns whether the source section is in bounds of the source code. Please note that calling this method causes the code of the source to be loaded if it was not yet loaded. /**
     * Returns whether the source section is in bounds of the {@link #getSource() source}
     * {@link Source#getCharacters() code}. Please note that calling this method causes the
     * {@link Source#getCharacters() code} of the {@link #getSource() source} to be loaded if it was
     * not yet loaded.
     */
    @Override
    boolean isValid() {
        return charIndex + charLength <= getSource().getCharacters().length();
    }

    @Override
    public int getStartLine() {
        if (!isValid()) {
            return 1;
        }
        return source.getLineNumber(getCharIndex());
    }

    @Override
    public int getStartColumn() {
        if (!isValid()) {
            return 1;
        }
        return source.getColumnNumber(getCharIndex());
    }

    @Override
    public int getEndLine() {
        if (!isValid()) {
            return 1;
        }
        return source.getLineNumber(getCharIndex() + Math.max(0, getCharLength() - 1));
    }

    @Override
    public int getEndColumn() {
        if (!isValid()) {
            return 1;
        }
        return source.getColumnNumber(getCharIndex() + Math.max(0, getCharLength() - 1));
    }

    @Override
    public int getCharIndex() {
        return charIndex;
    }

    @Override
    public int getCharLength() {
        return charLength;
    }

    @Override
    public int getCharEndIndex() {
        return getCharIndex() + getCharLength();
    }

    @Override
    public CharSequence getCharacters() {
        if (!isValid()) {
            return "";
        }
        return source.getCharacters().subSequence(getCharIndex(), getCharEndIndex());
    }

    @Override
    public int hashCode() {
        if (!isAvailable()) {
            return System.identityHashCode(this);
        }
        final int prime = 31;
        int result = 1;
        result = prime * result + charIndex;
        result = prime * result + charLength;
        result = prime * result + source.hashCode();
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (obj.getClass() != SourceSectionLoaded.class) {
            return false;
        }
        SourceSectionLoaded other = (SourceSectionLoaded) obj;
        if (charIndex != other.charIndex) {
            return false;
        }
        if (charLength != other.charLength) {
            return false;
        }
        if (source == null) {
            if (other.source != null) {
                return false;
            }
        } else if (!source.equals(other.source)) {
            return false;
        }
        return true;
    }

}