msb-public
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FairEmail
mirror of https://github.com/M66B/FairEmail.git
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Code Issues Projects Releases Wiki Activity

Added custom HTML to spanned converter (draft)

Browse Source
pull/178/head
M66B 5 years ago
parent d98ee009aa
commit bd0b1e5c11
1 changed files with 112 additions and 2 deletions
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112
app/src/main/java/eu/faircode/email/HtmlHelper.java
Unescape View File

@ -24,6 +24,7 @@ import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Build;
@ -33,6 +34,13 @@ import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.ForegroundColorSpan;
import android.text.style.ImageSpan;
import android.text.style.QuoteSpan;
import android.text.style.RelativeSizeSpan;
import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.URLSpan;
import android.text.style.UnderlineSpan;
import android.util.Base64;
import android.view.textclassifier.TextClassificationManager;
import android.view.textclassifier.TextLanguage;
@ -109,7 +117,7 @@ public class HtmlHelper {
private static final int MAX_FORMAT_TEXT_SIZE = 50 * 1024; // characters
private static final int MAX_FULL_TEXT_SIZE = 1024 * 1024; // characters
private static final int TRACKING_PIXEL_SURFACE = 25; // pixels
private static final float[] HEADING_SIZES = {1.5f, 1.4f, 1.3f, 1.2f, 1.1f, 1f};
private static final HashMap<String, Integer> x11ColorMap = new HashMap<>();
static {
@ -1753,6 +1761,108 @@ public class HtmlHelper {
}
static Spanned fromDocument(@NonNull Document document, @Nullable Html.ImageGetter imageGetter, @Nullable Html.TagHandler tagHandler) {
if (BuildConfig.DEBUG) {
// https://developer.android.com/guide/topics/text/spans
SpannableStringBuilder ssb = new SpannableStringBuilder();
NodeTraversor.traverse(new NodeVisitor() {
@Override
public void head(Node node, int depth) {
if (node instanceof Element) {
Element element = (Element) node;
element.attr("start-index", Integer.toString(ssb.length()));
} else if (node instanceof TextNode) {
TextNode tnode = (TextNode) node;
ssb.append(tnode.text());
}
}
@Override
public void tail(Node node, int depth) {
if (node instanceof Element) {
Element element = (Element) node;
int start = Integer.parseInt(element.attr("start-index"));
switch (element.tagName()) {
case "a":
String href = element.attr("href");
ssb.setSpan(new URLSpan(href), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case "body":
// Do nothing
break;
case "big":
ssb.setSpan(new RelativeSizeSpan(FONT_LARGE), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case "blockquote":
ssb.setSpan(new QuoteSpan(), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case "br":
ssb.append("\n");
break;
case "em":
ssb.setSpan(new StyleSpan(Typeface.ITALIC), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case "h1":
case "h2":
case "h3":
case "h4":
case "h5":
case "h6":
int level = element.tagName().charAt(1) - '1';
ssb.setSpan(new RelativeSizeSpan(HEADING_SIZES[level]), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
ssb.setSpan(new StyleSpan(Typeface.BOLD), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case "img":
if (imageGetter == null) {
Log.e("img without getter");
break;
}
String src = element.attr("src");
Drawable d = imageGetter.getDrawable(src);
ssb.append("\uFFFC"); // Object replacement character
ssb.setSpan(new ImageSpan(d, src), ssb.length() - 1, ssb.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case "small":
ssb.setSpan(new RelativeSizeSpan(FONT_SMALL), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case "span":
// Do nothing
break;
case "strong":
ssb.setSpan(new StyleSpan(Typeface.BOLD), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case "u":
ssb.setSpan(new UnderlineSpan(), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
default:
Log.e("Unknown tag=" + element.tagName());
}
String style = element.attr("style");
if (!TextUtils.isEmpty(style)) {
String[] params = style.split(";");
for (String param : params) {
int semi = param.indexOf(":");
String key = param.substring(0, semi);
String value = param.substring(semi + 1);
switch (key) {
case "color":
int color = Integer.parseInt(value.substring(1), 16) | 0xFF000000;
ssb.setSpan(new ForegroundColorSpan(color), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
case "text-decoration":
if ("line-through".equals(value))
ssb.setSpan(new StrikethroughSpan(), start, ssb.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
break;
}
}
}
}
}
}, document.body());
return ssb;
} else
return fromHtml(document.html(), imageGetter, null);
}

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