com.duy.pascal.ui.editor.highlight.StringHighlighter.java Source code

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Here is the source code for com.duy.pascal.ui.editor.highlight.StringHighlighter.java

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/*
 *  Copyright (c) 2017 Tran Le Duy
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.duy.pascal.ui.editor.highlight;

import android.support.annotation.NonNull;
import android.support.v4.util.Pair;
import android.text.Editable;
import android.text.Spannable;
import android.text.style.ForegroundColorSpan;

import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Created by Duy on 18-Jun-17.
 */

public class StringHighlighter implements IHighlighter {
    /**
     * match string pascal
     * include
     * <p>
     * 'string'
     * <p>
     * And can not find close quote
     * <p>
     * 'sadhasdhasdhashdhas ds asda sd
     */
    public static final Pattern STRINGS = Pattern.compile("((')(.*?)('))" + //'string'
            "|((')(.+))", Pattern.DOTALL); // no end string 'asdasdasd

    private ArrayList<Pair<Integer, Integer>> mStringRegion = new ArrayList<>();
    private IEditorColorScheme codeTheme;

    public StringHighlighter(IEditorColorScheme codeTheme) {
        this.codeTheme = codeTheme;
    }

    @Override
    public void highlight(@NonNull Editable allText, @NonNull CharSequence textToHighlight, int start) {
        mStringRegion.clear();
        for (Matcher m = STRINGS.matcher(textToHighlight); m.find();) {
            allText.setSpan(new ForegroundColorSpan(codeTheme.getStringColor()), start + m.start(), start + m.end(),
                    Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            mStringRegion.add(new Pair<>(start + m.start(), start + m.end()));
        }
    }

    @Override
    public void setCodeTheme(IEditorColorScheme codeTheme) {
        this.codeTheme = codeTheme;
    }

    public ArrayList<Pair<Integer, Integer>> getStringRegion() {
        return mStringRegion;
    }

}