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@ -24,6 +24,8 @@ import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.text.Html;
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import android.text.Spanned;
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import android.text.TextUtils;
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import android.util.Base64;
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@ -49,20 +51,35 @@ import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.core.text.HtmlCompat;
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import static androidx.core.text.HtmlCompat.FROM_HTML_SEPARATOR_LINE_BREAK_LIST_ITEM;
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import static androidx.core.text.HtmlCompat.TO_HTML_PARAGRAPH_LINES_CONSECUTIVE;
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public class HtmlHelper {
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private static final int PREVIEW_SIZE = 250;
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private static Pattern pattern = Pattern.compile("([http|https]+://[\\w\\S(\\.|:|/)]+)");
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private static final List<String> heads = Arrays.asList("p", "h1", "h2", "h3", "h4", "h5", "tr");
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private static final List<String> tails = Arrays.asList("br", "dd", "dt", "p", "h1", "h2", "h3", "h4", "h5");
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private static final List<String> heads = Arrays.asList("h1", "h2", "h3", "h4", "h5", "h6", "p", "table", "ol", "ul", "br", "hr");
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private static final List<String> tails = Arrays.asList("h1", "h2", "h3", "h4", "h5", "h6", "p", "ol", "ul", "li");
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static String sanitize(String html, boolean quotes) {
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static String sanitize(String html, boolean showQuotes) {
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Document document = Jsoup.parse(Jsoup.clean(html, Whitelist
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.relaxed()
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.addProtocols("img", "src", "cid")
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.addProtocols("img", "src", "data")));
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for (Element tr : document.select("tr"))
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tr.after("<br>");
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for (Element td : document.select("th,td")) {
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Element next = td.nextElementSibling();
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if (next != null && ("th".equals(next.tagName()) || "td".equals(next.tagName())))
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td.append("<span> </span>");
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else
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td.append("<br>");
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}
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for (Element ol : document.select("ol,ul"))
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ol.append("<br>");
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for (Element img : document.select("img")) {
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boolean linked = false;
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@ -88,15 +105,16 @@ public class HtmlHelper {
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p.appendChild(img);
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}
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if (!quotes)
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if (!showQuotes)
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for (Element quote : document.select("blockquote"))
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quote.text("…");
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quote.html("…");
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// Autolink
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NodeTraversor.traverse(new NodeVisitor() {
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@Override
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public void head(Node node, int depth) {
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if (node instanceof TextNode) {
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String text = ((TextNode) node).text();
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String text = Html.escapeHtml(((TextNode) node).text());
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Matcher matcher = pattern.matcher(text);
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while (matcher.find()) {
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String ref = matcher.group();
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@ -281,29 +299,72 @@ public class HtmlHelper {
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final StringBuilder sb = new StringBuilder();
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NodeTraversor.traverse(new NodeVisitor() {
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private int qlevel = 0;
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public void head(Node node, int depth) {
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if (node instanceof TextNode)
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sb.append(((TextNode) node).text());
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sb.append(((TextNode) node).text()).append(' ');
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else {
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String name = node.nodeName();
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if (name.equals("li"))
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sb.append("\n * ");
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else if (name.equals("dt"))
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sb.append(" ");
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else if (heads.contains(name))
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sb.append("\n");
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if ("li".equals(name))
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sb.append("* ");
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else if ("blockquote".equals(name))
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qlevel++;
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if (heads.contains(name))
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newline();
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}
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}
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public void tail(Node node, int depth) {
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String name = node.nodeName();
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if ("a".equals(name))
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sb.append("[").append(node.absUrl("href")).append("] ");
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if ("img".equals(name))
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sb.append("[").append(node.absUrl("src")).append("] ");
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else if ("th".equals(name) || "td".equals(name)) {
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Node next = node.nextSibling();
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if (next == null || !("th".equals(next.nodeName()) || "td".equals(next.nodeName())))
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newline();
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} else if ("blockquote".equals(name))
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qlevel--;
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if (tails.contains(name))
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sb.append("\n");
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else if (name.equals("a"))
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sb.append(" <").append(node.absUrl("href")).append(">");
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newline();
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}
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private void newline() {
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trimEnd(sb);
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sb.append("\n");
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for (int i = 0; i < qlevel; i++)
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sb.append('>');
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if (qlevel > 0)
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sb.append(' ');
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}
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}, Jsoup.parse(html));
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trimEnd(sb);
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sb.append("\n");
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return sb.toString();
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}
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static void trimEnd(StringBuilder sb) {
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int length = sb.length();
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while (length > 0 && sb.charAt(length - 1) == ' ')
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length--;
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sb.setLength(length);
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}
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static Spanned fromHtml(@NonNull String html) {
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return fromHtml(html, null, null);
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}
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static Spanned fromHtml(@NonNull String html, @Nullable Html.ImageGetter imageGetter, @Nullable Html.TagHandler tagHandler) {
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return HtmlCompat.fromHtml(html, FROM_HTML_SEPARATOR_LINE_BREAK_LIST_ITEM, imageGetter, null);
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}
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static String toHtml(Spanned spanned) {
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return HtmlCompat.toHtml(spanned, TO_HTML_PARAGRAPH_LINES_CONSECUTIVE);
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}
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}
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M66B
6 years ago