mirror of https://github.com/kurisufriend/Clover
Floens
8 years ago
parent
5fc8c7b0d7
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10ed72775e
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/* |
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* Clover - 4chan browser https://github.com/Floens/Clover/
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* Copyright (C) 2014 Floens |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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package org.floens.chan.core.site.common; |
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import android.text.SpannableString; |
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import org.floens.chan.core.model.Post; |
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import org.floens.chan.core.model.PostLinkable; |
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import org.floens.chan.ui.theme.Theme; |
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import org.jsoup.helper.StringUtil; |
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import org.jsoup.nodes.Element; |
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import org.jsoup.nodes.Node; |
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import org.jsoup.nodes.TextNode; |
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import org.jsoup.select.NodeTraversor; |
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import org.jsoup.select.NodeVisitor; |
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import org.nibor.autolink.LinkExtractor; |
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import org.nibor.autolink.LinkSpan; |
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import org.nibor.autolink.LinkType; |
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import java.util.EnumSet; |
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public class ChanParserHelper { |
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private static final LinkExtractor LINK_EXTRACTOR = LinkExtractor.builder() |
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.linkTypes(EnumSet.of(LinkType.URL)) |
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.build(); |
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/** |
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* Detect links in the given spannable, and create PostLinkables with Type.LINK for the |
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* links found onto the spannable. |
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* <p> |
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* The links are detected with the autolink-java library. |
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* |
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* @param theme The theme to style the links with |
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* @param post The post where the linkables get added to. |
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* @param text Text to find links in |
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* @param spannable Spannable to set the spans on. |
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*/ |
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public static void detectLinks(Theme theme, Post.Builder post, String text, SpannableString spannable) { |
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final Iterable<LinkSpan> links = LINK_EXTRACTOR.extractLinks(text); |
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for (final LinkSpan link : links) { |
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final String linkText = text.substring(link.getBeginIndex(), link.getEndIndex()); |
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final PostLinkable pl = new PostLinkable(theme, linkText, linkText, PostLinkable.Type.LINK); |
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spannable.setSpan(pl, link.getBeginIndex(), link.getEndIndex(), 0); |
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post.addLinkable(pl); |
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} |
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} |
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// Below code taken from org.jsoup.nodes.Element.text(), but it preserves <br>
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public static String getNodeTextPreservingLineBreaks(Element node) { |
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final StringBuilder accum = new StringBuilder(); |
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new NodeTraversor(new NodeVisitor() { |
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public void head(Node node, int depth) { |
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if (node instanceof TextNode) { |
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TextNode textNode = (TextNode) node; |
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appendNormalisedText(accum, textNode); |
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} else if (node instanceof Element) { |
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Element element = (Element) node; |
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if (accum.length() > 0 && |
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element.isBlock() && |
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!lastCharIsWhitespace(accum)) |
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accum.append(" "); |
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if (element.tag().getName().equals("br")) { |
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accum.append("\n"); |
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} |
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} |
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} |
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public void tail(Node node, int depth) { |
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} |
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}).traverse(node); |
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return accum.toString().trim(); |
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} |
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// Copied from org.jsoup.nodes.Element.text()
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private static boolean lastCharIsWhitespace(StringBuilder sb) { |
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return sb.length() != 0 && sb.charAt(sb.length() - 1) == ' '; |
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} |
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// Copied from org.jsoup.nodes.Element.text()
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private static void appendNormalisedText(StringBuilder accum, TextNode textNode) { |
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String text = textNode.getWholeText(); |
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if (!preserveWhitespace(textNode.parent())) { |
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text = normaliseWhitespace(text); |
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if (lastCharIsWhitespace(accum)) |
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text = stripLeadingWhitespace(text); |
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} |
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accum.append(text); |
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} |
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// Copied from org.jsoup.nodes.Element.text()
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private static String normaliseWhitespace(String text) { |
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text = StringUtil.normaliseWhitespace(text); |
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return text; |
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} |
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// Copied from org.jsoup.nodes.Element.text()
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private static String stripLeadingWhitespace(String text) { |
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return text.replaceFirst("^\\s+", ""); |
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} |
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// Copied from org.jsoup.nodes.Element.text()
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private static boolean preserveWhitespace(Node node) { |
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// looks only at this element and one level up, to prevent recursion & needless stack searches
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if (node != null && node instanceof Element) { |
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Element element = (Element) node; |
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return element.tag().preserveWhitespace() || |
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element.parent() != null && element.parent().tag().preserveWhitespace(); |
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} |
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return false; |
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} |
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} |
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