/*
* Copyright (C) 2007 The Android Open Source Project
*
* 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.hippo.text;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.support.annotation.ColorInt;
import android.support.annotation.NonNull;
import android.text.Layout;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.AbsoluteSizeSpan;
import android.text.style.AlignmentSpan;
import android.text.style.CharacterStyle;
import android.text.style.ForegroundColorSpan;
import android.text.style.ImageSpan;
import android.text.style.ParagraphStyle;
import android.text.style.QuoteSpan;
import android.text.style.RelativeSizeSpan;
import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.SubscriptSpan;
import android.text.style.SuperscriptSpan;
import android.text.style.TextAppearanceSpan;
import android.text.style.TypefaceSpan;
import android.text.style.URLSpan;
import android.text.style.UnderlineSpan;
import android.util.Log;
import org.ccil.cowan.tagsoup.HTMLSchema;
import org.ccil.cowan.tagsoup.Parser;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import java.io.IOException;
import java.io.StringReader;
import java.text.ParseException;
import java.util.HashMap;
import java.util.Locale;
/**
* This class processes HTML strings into displayable styled text.
* Not all HTML tags are supported.
*/
public final class Html {
/**
* Retrieves images for HTML <img> tags.
*/
public interface ImageGetter {
/**
* This method is called when the HTML parser encounters an
* <img> tag. The <code>source</code> argument is the
* string from the "src" attribute; the return value should be
* a Drawable representation of the image or <code>null</code>
* for a generic replacement image. Make sure you call
* setBounds() on your Drawable if it doesn't already have
* its bounds set.
*/
Drawable getDrawable(String source);
}
/**
* Is notified when HTML tags are encountered that the parser does
* not know how to interpret.
*/
public interface TagHandler {
/**
* This method will be called when the HTML parser encounters
* a tag.
*
* @return True if the tag was handled, false otherwise.
*/
boolean handleTag(boolean opening, String tag,
SpannableStringBuilder output, XMLReader xmlReader,
Attributes attributes);
}
private Html() { }
/**
* Returns displayable styled text from the provided HTML string.
* Any <img> tags in the HTML will display as a generic
* replacement image which your program can then go through and
* replace with real images.
*
* <p>This uses TagSoup to handle real HTML, including all of the brokenness found in the wild.
*/
public static Spanned fromHtml(String source) {
return fromHtml(source, null, null);
}
/**
* Lazy initialization holder for HTML parser. This class will
* a) be preloaded by the zygote, or b) not loaded until absolutely
* necessary.
*/
private static final class HtmlParser {
private static final HTMLSchema schema = new HTMLSchema();
}
/**
* Returns displayable styled text from the provided HTML string.
* Any <img> tags in the HTML will use the specified ImageGetter
* to request a representation of the image (use null if you don't
* want this) and the specified TagHandler to handle unknown tags
* (specify null if you don't want this).
*
* <p>This uses TagSoup to handle real HTML, including all of the brokenness found in the wild.
*/
public static SpannableStringBuilder fromHtml(String source, ImageGetter imageGetter,
TagHandler tagHandler) {
Parser parser = new Parser();
try {
parser.setProperty(Parser.schemaProperty, HtmlParser.schema);
} catch (org.xml.sax.SAXNotRecognizedException | org.xml.sax.SAXNotSupportedException e) {
// Should not happen.
throw new RuntimeException(e);
}
HtmlToSpannedConverter converter =
new HtmlToSpannedConverter(source, imageGetter, tagHandler,
parser);
return converter.convert();
}
/**
* Returns an HTML representation of the provided Spanned text. A best effort is
* made to add HTML tags corresponding to spans. Also note that HTML metacharacters
* (such as "<" and "&") within the input text are escaped.
*
* @param text input text to convert
* @return string containing input converted to HTML
*/
public static String toHtml(Spanned text) {
StringBuilder out = new StringBuilder();
withinHtml(out, text);
return out.toString();
}
/**
* Returns an HTML escaped representation of the given plain text.
*/
public static String escapeHtml(CharSequence text) {
StringBuilder out = new StringBuilder();
withinStyle(out, text, 0, text.length());
return out.toString();
}
private static void withinHtml(StringBuilder out, Spanned text) {
int len = text.length();
int next;
for (int i = 0; i < text.length(); i = next) {
next = text.nextSpanTransition(i, len, ParagraphStyle.class);
ParagraphStyle[] style = text.getSpans(i, next, ParagraphStyle.class);
String elements = " ";
boolean needDiv = false;
for(int j = 0; j < style.length; j++) {
if (style[j] instanceof AlignmentSpan) {
Layout.Alignment align =
((AlignmentSpan) style[j]).getAlignment();
needDiv = true;
if (align == Layout.Alignment.ALIGN_CENTER) {
elements = "align=\"center\" " + elements;
} else if (align == Layout.Alignment.ALIGN_OPPOSITE) {
elements = "align=\"right\" " + elements;
} else {
elements = "align=\"left\" " + elements;
}
}
}
if (needDiv) {
out.append("<div ").append(elements).append(">");
}
withinDiv(out, text, i, next);
if (needDiv) {
out.append("</div>");
}
}
}
private static void withinDiv(StringBuilder out, Spanned text,
int start, int end) {
int next;
for (int i = start; i < end; i = next) {
next = text.nextSpanTransition(i, end, QuoteSpan.class);
QuoteSpan[] quotes = text.getSpans(i, next, QuoteSpan.class);
for (QuoteSpan quote : quotes) {
out.append("<blockquote>");
}
withinBlockquote(out, text, i, next);
for (QuoteSpan quote : quotes) {
out.append("</blockquote>\n");
}
}
}
private static String getOpenParaTagWithDirection(Spanned text, int start, int end) {
//final int len = end - start;
//final byte[] levels = new byte[len];
//final char[] buffer = new char[len];
//TextUtils.getChars(text, start, end, buffer, 0);
//int paraDir = AndroidBidi.bidi(Layout.DIR_REQUEST_DEFAULT_LTR, buffer, levels, len,
// false /* no info */);
//switch(paraDir) {
// case Layout.DIR_RIGHT_TO_LEFT:
// return "<p dir=\"rtl\">";
// case Layout.DIR_LEFT_TO_RIGHT:
// default:
// return "<p dir=\"ltr\">";
//}
return "<p dir=\"ltr\">";
}
private static void withinBlockquote(StringBuilder out, Spanned text,
int start, int end) {
out.append(getOpenParaTagWithDirection(text, start, end));
int next;
for (int i = start; i < end; i = next) {
next = TextUtils.indexOf(text, '\n', i, end);
if (next < 0) {
next = end;
}
int nl = 0;
while (next < end && text.charAt(next) == '\n') {
nl++;
next++;
}
if (withinParagraph(out, text, i, next - nl, nl, next == end)) {
/* Paragraph should be closed */
out.append("</p>\n");
out.append(getOpenParaTagWithDirection(text, next, end));
}
}
out.append("</p>\n");
}
/* Returns true if the caller should close and reopen the paragraph. */
private static boolean withinParagraph(StringBuilder out, Spanned text,
int start, int end, int nl,
boolean last) {
int next;
for (int i = start; i < end; i = next) {
next = text.nextSpanTransition(i, end, CharacterStyle.class);
CharacterStyle[] style = text.getSpans(i, next,
CharacterStyle.class);
for (int j = 0; j < style.length; j++) {
if (style[j] instanceof StyleSpan) {
int s = ((StyleSpan) style[j]).getStyle();
if ((s & Typeface.BOLD) != 0) {
out.append("<b>");
}
if ((s & Typeface.ITALIC) != 0) {
out.append("<i>");
}
}
if (style[j] instanceof TypefaceSpan) {
String s = ((TypefaceSpan) style[j]).getFamily();
if ("monospace".equals(s)) {
out.append("<tt>");
}
}
if (style[j] instanceof SuperscriptSpan) {
out.append("<sup>");
}
if (style[j] instanceof SubscriptSpan) {
out.append("<sub>");
}
if (style[j] instanceof UnderlineSpan) {
out.append("<u>");
}
if (style[j] instanceof StrikethroughSpan) {
out.append("<strike>");
}
if (style[j] instanceof URLSpan) {
out.append("<a href=\"");
out.append(((URLSpan) style[j]).getURL());
out.append("\">");
}
if (style[j] instanceof ImageSpan) {
out.append("<img src=\"");
out.append(((ImageSpan) style[j]).getSource());
out.append("\">");
// Don't output the dummy character underlying the image.
i = next;
}
if (style[j] instanceof AbsoluteSizeSpan) {
out.append("<font size =\"");
out.append(((AbsoluteSizeSpan) style[j]).getSize() / 6);
out.append("\">");
}
if (style[j] instanceof ForegroundColorSpan) {
out.append("<font color =\"#");
String color = Integer.toHexString(((ForegroundColorSpan)
style[j]).getForegroundColor() + 0x01000000);
while (color.length() < 6) {
color = "0" + color;
}
out.append(color);
out.append("\">");
}
}
withinStyle(out, text, i, next);
for (int j = style.length - 1; j >= 0; j--) {
if (style[j] instanceof ForegroundColorSpan) {
out.append("</font>");
}
if (style[j] instanceof AbsoluteSizeSpan) {
out.append("</font>");
}
if (style[j] instanceof URLSpan) {
out.append("</a>");
}
if (style[j] instanceof StrikethroughSpan) {
out.append("</strike>");
}
if (style[j] instanceof UnderlineSpan) {
out.append("</u>");
}
if (style[j] instanceof SubscriptSpan) {
out.append("</sub>");
}
if (style[j] instanceof SuperscriptSpan) {
out.append("</sup>");
}
if (style[j] instanceof TypefaceSpan) {
String s = ((TypefaceSpan) style[j]).getFamily();
if (s.equals("monospace")) {
out.append("</tt>");
}
}
if (style[j] instanceof StyleSpan) {
int s = ((StyleSpan) style[j]).getStyle();
if ((s & Typeface.BOLD) != 0) {
out.append("</b>");
}
if ((s & Typeface.ITALIC) != 0) {
out.append("</i>");
}
}
}
}
if (nl == 1) {
out.append("<br>\n");
return false;
} else {
for (int i = 2; i < nl; i++) {
out.append("<br>");
}
return !last;
}
}
private static void withinStyle(StringBuilder out, CharSequence text,
int start, int end) {
for (int i = start; i < end; i++) {
char c = text.charAt(i);
if (c == '<') {
out.append("<");
} else if (c == '>') {
out.append(">");
} else if (c == '&') {
out.append("&");
} else if (c >= 0xD800 && c <= 0xDFFF) {
if (c < 0xDC00 && i + 1 < end) {
char d = text.charAt(i + 1);
if (d >= 0xDC00 && d <= 0xDFFF) {
i++;
int codepoint = 0x010000 | (int) c - 0xD800 << 10 | (int) d - 0xDC00;
out.append("&#").append(codepoint).append(";");
}
}
} else if (c > 0x7E || c < ' ') {
out.append("&#").append((int) c).append(";");
} else if (c == ' ') {
while (i + 1 < end && text.charAt(i + 1) == ' ') {
out.append(" ");
i++;
}
out.append(' ');
} else {
out.append(c);
}
}
}
}
class HtmlToSpannedConverter implements ContentHandler {
private static final String TAG = HtmlToSpannedConverter.class.getSimpleName();
private static final float[] HEADER_SIZES = {
1.5f, 1.4f, 1.3f, 1.2f, 1.1f, 1f,
};
private final String mSource;
private final XMLReader mReader;
private final SpannableStringBuilder mSpannableStringBuilder;
private final Html.ImageGetter mImageGetter;
private final Html.TagHandler mTagHandler;
public HtmlToSpannedConverter(
String source, Html.ImageGetter imageGetter, Html.TagHandler tagHandler,
Parser parser) {
mSource = source;
mSpannableStringBuilder = new SpannableStringBuilder();
mImageGetter = imageGetter;
mTagHandler = tagHandler;
mReader = parser;
}
public SpannableStringBuilder convert() {
mReader.setContentHandler(this);
try {
mReader.parse(new InputSource(new StringReader(mSource)));
} catch (IOException | SAXException e) {
// We are reading from a string. There should not be IO problems.
throw new RuntimeException(e);
}
// Fix flags and range for paragraph-type markup.
Object[] obj = mSpannableStringBuilder.getSpans(0, mSpannableStringBuilder.length(), ParagraphStyle.class);
for (int i = 0; i < obj.length; i++) {
int start = mSpannableStringBuilder.getSpanStart(obj[i]);
int end = mSpannableStringBuilder.getSpanEnd(obj[i]);
// If the last line of the range is blank, back off by one.
if (end - 2 >= 0) {
if (mSpannableStringBuilder.charAt(end - 1) == '\n' &&
mSpannableStringBuilder.charAt(end - 2) == '\n') {
end--;
}
}
if (end == start) {
mSpannableStringBuilder.removeSpan(obj[i]);
} else {
mSpannableStringBuilder.setSpan(obj[i], start, end, Spannable.SPAN_PARAGRAPH);
}
}
return mSpannableStringBuilder;
}
private void handleStartTag(String tag, Attributes attributes) {
if (mTagHandler == null || !mTagHandler.handleTag(true, tag,
mSpannableStringBuilder, mReader, attributes)) {
if (tag.equalsIgnoreCase("br")) {
// We don't need to handle this. TagSoup will ensure that there's a </br> for each <br>
// so we can safely emite the linebreaks when we handle the close tag.
} else if (tag.equalsIgnoreCase("p")) {
handleP(mSpannableStringBuilder);
} else if (tag.equalsIgnoreCase("div")) {
handleP(mSpannableStringBuilder);
} else if (tag.equalsIgnoreCase("strong")) {
start(mSpannableStringBuilder, new Bold());
} else if (tag.equalsIgnoreCase("b")) {
start(mSpannableStringBuilder, new Bold());
} else if (tag.equalsIgnoreCase("em")) {
start(mSpannableStringBuilder, new Italic());
} else if (tag.equalsIgnoreCase("cite")) {
start(mSpannableStringBuilder, new Italic());
} else if (tag.equalsIgnoreCase("dfn")) {
start(mSpannableStringBuilder, new Italic());
} else if (tag.equalsIgnoreCase("i")) {
start(mSpannableStringBuilder, new Italic());
} else if (tag.equalsIgnoreCase("big")) {
start(mSpannableStringBuilder, new Big());
} else if (tag.equalsIgnoreCase("small")) {
start(mSpannableStringBuilder, new Small());
} else if (tag.equalsIgnoreCase("font")) {
startFont(mSpannableStringBuilder, attributes);
} else if (tag.equalsIgnoreCase("blockquote")) {
handleP(mSpannableStringBuilder);
start(mSpannableStringBuilder, new Blockquote());
} else if (tag.equalsIgnoreCase("tt")) {
start(mSpannableStringBuilder, new Monospace());
} else if (tag.equalsIgnoreCase("a")) {
startA(mSpannableStringBuilder, attributes);
} else if (tag.equalsIgnoreCase("u")) {
start(mSpannableStringBuilder, new Underline());
} else if (tag.equalsIgnoreCase("ins")) {
start(mSpannableStringBuilder, new Underline());
} else if (tag.equalsIgnoreCase("strike")) {
start(mSpannableStringBuilder, new Strike());
} else if (tag.equalsIgnoreCase("s")) {
start(mSpannableStringBuilder, new Strike());
} else if (tag.equalsIgnoreCase("del")) {
start(mSpannableStringBuilder, new Strike());
} else if (tag.equalsIgnoreCase("sup")) {
start(mSpannableStringBuilder, new Super());
} else if (tag.equalsIgnoreCase("sub")) {
start(mSpannableStringBuilder, new Sub());
} else if (tag.length() == 2 &&
Character.toLowerCase(tag.charAt(0)) == 'h' &&
tag.charAt(1) >= '1' && tag.charAt(1) <= '6') {
handleP(mSpannableStringBuilder);
start(mSpannableStringBuilder, new Header(tag.charAt(1) - '1'));
} else if (tag.equalsIgnoreCase("img")) {
startImg(mSpannableStringBuilder, attributes, mImageGetter);
}
}
}
private void handleEndTag(String tag) {
if (mTagHandler == null || !mTagHandler.handleTag(false, tag,
mSpannableStringBuilder, mReader, null)) {
if (tag.equalsIgnoreCase("br")) {
handleBr(mSpannableStringBuilder);
} else if (tag.equalsIgnoreCase("p")) {
handleP(mSpannableStringBuilder);
} else if (tag.equalsIgnoreCase("div")) {
handleP(mSpannableStringBuilder);
} else if (tag.equalsIgnoreCase("strong")) {
end(mSpannableStringBuilder, Bold.class, new StyleSpan(Typeface.BOLD));
} else if (tag.equalsIgnoreCase("b")) {
end(mSpannableStringBuilder, Bold.class, new StyleSpan(Typeface.BOLD));
} else if (tag.equalsIgnoreCase("em")) {
end(mSpannableStringBuilder, Italic.class, new StyleSpan(Typeface.ITALIC));
} else if (tag.equalsIgnoreCase("cite")) {
end(mSpannableStringBuilder, Italic.class, new StyleSpan(Typeface.ITALIC));
} else if (tag.equalsIgnoreCase("dfn")) {
end(mSpannableStringBuilder, Italic.class, new StyleSpan(Typeface.ITALIC));
} else if (tag.equalsIgnoreCase("i")) {
end(mSpannableStringBuilder, Italic.class, new StyleSpan(Typeface.ITALIC));
} else if (tag.equalsIgnoreCase("big")) {
end(mSpannableStringBuilder, Big.class, new RelativeSizeSpan(1.25f));
} else if (tag.equalsIgnoreCase("small")) {
end(mSpannableStringBuilder, Small.class, new RelativeSizeSpan(0.8f));
} else if (tag.equalsIgnoreCase("font")) {
endFont(mSpannableStringBuilder);
} else if (tag.equalsIgnoreCase("blockquote")) {
handleP(mSpannableStringBuilder);
end(mSpannableStringBuilder, Blockquote.class, new QuoteSpan());
} else if (tag.equalsIgnoreCase("tt")) {
end(mSpannableStringBuilder, Monospace.class,
new TypefaceSpan("monospace"));
} else if (tag.equalsIgnoreCase("a")) {
endA(mSpannableStringBuilder);
} else if (tag.equalsIgnoreCase("u")) {
end(mSpannableStringBuilder, Underline.class, new UnderlineSpan());
} else if (tag.equalsIgnoreCase("ins")) {
end(mSpannableStringBuilder, Underline.class, new UnderlineSpan());
} else if (tag.equalsIgnoreCase("strike")) {
end(mSpannableStringBuilder, Strike.class, new StrikethroughSpan());
} else if (tag.equalsIgnoreCase("s")) {
end(mSpannableStringBuilder, Strike.class, new StrikethroughSpan());
} else if (tag.equalsIgnoreCase("del")) {
end(mSpannableStringBuilder, Strike.class, new StrikethroughSpan());
} else if (tag.equalsIgnoreCase("sup")) {
end(mSpannableStringBuilder, Super.class, new SuperscriptSpan());
} else if (tag.equalsIgnoreCase("sub")) {
end(mSpannableStringBuilder, Sub.class, new SubscriptSpan());
} else if (tag.length() == 2 &&
Character.toLowerCase(tag.charAt(0)) == 'h' &&
tag.charAt(1) >= '1' && tag.charAt(1) <= '6') {
handleP(mSpannableStringBuilder);
endHeader(mSpannableStringBuilder);
}
}
}
private static void handleP(SpannableStringBuilder text) {
int len = text.length();
if (len >= 1 && text.charAt(len - 1) == '\n') {
if (len >= 2 && text.charAt(len - 2) == '\n') {
return;
}
text.append("\n");
return;
}
if (len != 0) {
text.append("\n\n");
}
}
private static void handleBr(SpannableStringBuilder text) {
text.append("\n");
}
private static Object getLast(Spanned text, Class kind) {
/*
* This knows that the last returned object from getSpans()
* will be the most recently added.
*/
Object[] objs = text.getSpans(0, text.length(), kind);
if (objs.length == 0) {
return null;
} else {
return objs[objs.length - 1];
}
}
private static void start(SpannableStringBuilder text, Object mark) {
int len = text.length();
text.setSpan(mark, len, len, Spannable.SPAN_MARK_MARK);
}
private static void end(SpannableStringBuilder text, Class kind,
Object repl) {
int len = text.length();
Object obj = getLast(text, kind);
int where = text.getSpanStart(obj);
text.removeSpan(obj);
if (where != len) {
text.setSpan(repl, where, len, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
private static void startImg(SpannableStringBuilder text,
Attributes attributes, Html.ImageGetter img) {
String src = attributes.getValue("", "src");
Drawable d = null;
if (img != null) {
d = img.getDrawable(src);
}
if (d == null) {
d = Resources.getSystem().
getDrawable(android.R.drawable.ic_menu_gallery);
d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
}
int len = text.length();
text.append("\uFFFC");
text.setSpan(new ImageSpan(d, src), len, text.length(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
private static void startFont(SpannableStringBuilder text,
Attributes attributes) {
String color = attributes.getValue("", "color");
String face = attributes.getValue("", "face");
int len = text.length();
text.setSpan(new Font(color, face), len, len, Spannable.SPAN_MARK_MARK);
}
private static void endFont(SpannableStringBuilder text) {
int len = text.length();
Object obj = getLast(text, Font.class);
int where = text.getSpanStart(obj);
text.removeSpan(obj);
if (where != len) {
Font f = (Font) obj;
if (!TextUtils.isEmpty(f.mColor)) {
if (f.mColor.startsWith("@")) {
Resources res = Resources.getSystem();
String name = f.mColor.substring(1);
int colorRes = res.getIdentifier(name, "color", "android");
text.setSpan(new TextAppearanceSpan(null, 0, 0, ColorStateList.valueOf(res.getColor(colorRes)), null),
where, len,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
} else {
try {
int c = getHtmlColor(f.mColor);
text.setSpan(new ForegroundColorSpan(c | 0xFF000000),
where, len,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
} catch (ParseException e) {
// Ignore
}
}
}
if (f.mFace != null) {
text.setSpan(new TypefaceSpan(f.mFace), where, len,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
}
private static void startA(SpannableStringBuilder text, Attributes attributes) {
String href = attributes.getValue("", "href");
int len = text.length();
text.setSpan(new Href(href), len, len, Spannable.SPAN_MARK_MARK);
}
private static void endA(SpannableStringBuilder text) {
int len = text.length();
Object obj = getLast(text, Href.class);
int where = text.getSpanStart(obj);
text.removeSpan(obj);
if (where != len) {
Href h = (Href) obj;
if (h.mHref != null) {
text.setSpan(new URLSpan(h.mHref), where, len,
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
}
private static void endHeader(SpannableStringBuilder text) {
int len = text.length();
Object obj = getLast(text, Header.class);
int where = text.getSpanStart(obj);
text.removeSpan(obj);
// Back off not to change only the text, not the blank line.
while (len > where && text.charAt(len - 1) == '\n') {
len--;
}
if (where != len) {
Header h = (Header) obj;
text.setSpan(new RelativeSizeSpan(HEADER_SIZES[h.mLevel]),
where, len, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
text.setSpan(new StyleSpan(Typeface.BOLD),
where, len, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
@Override
public void setDocumentLocator(Locator locator) {
}
@Override
public void startDocument() throws SAXException {
}
@Override
public void endDocument() throws SAXException {
}
@Override
public void startPrefixMapping(String prefix, String uri) throws SAXException {
}
@Override
public void endPrefixMapping(String prefix) throws SAXException {
}
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes)
throws SAXException {
handleStartTag(localName, attributes);
}
@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
handleEndTag(localName);
}
@Override
public void characters(char ch[], int start, int length) throws SAXException {
StringBuilder sb = new StringBuilder();
/*
* Ignore whitespace that immediately follows other whitespace;
* newlines count as spaces.
*/
for (int i = 0; i < length; i++) {
char c = ch[i + start];
if (c == ' ' || c == '\n') {
char pred;
int len = sb.length();
if (len == 0) {
len = mSpannableStringBuilder.length();
if (len == 0) {
pred = '\n';
} else {
pred = mSpannableStringBuilder.charAt(len - 1);
}
} else {
pred = sb.charAt(len - 1);
}
if (pred != ' ' && pred != '\n') {
sb.append(' ');
}
} else {
sb.append(c);
}
}
mSpannableStringBuilder.append(sb);
}
@Override
public void ignorableWhitespace(char ch[], int start, int length) throws SAXException {
}
@Override
public void processingInstruction(String target, String data) throws SAXException {
}
@Override
public void skippedEntity(String name) throws SAXException {
}
private static class Bold { }
private static class Italic { }
private static class Underline { }
private static class Strike { }
private static class Big { }
private static class Small { }
private static class Monospace { }
private static class Blockquote { }
private static class Super { }
private static class Sub { }
private static class Font {
public String mColor;
public String mFace;
public Font(String color, String face) {
mColor = color;
mFace = face;
}
}
private static class Href {
public String mHref;
public Href(String href) {
mHref = href;
}
}
private static class Header {
private int mLevel;
public Header(int level) {
mLevel = level;
}
}
/**
* Parse the color string, and return the corresponding color-int.
* If the string cannot be parsed, return -1. Supported formats are:
* #RRGGBB
* #AARRGGBB
* rgb(255, 255, 255)
* or color name
*/
@ColorInt
public static int getHtmlColor(@NonNull String colorString) throws ParseException {
colorString = colorString.trim();
try {
return getHtmlColorInternal(colorString);
} catch (NumberFormatException e) {
Log.e(TAG, "Unknown color: " + colorString);
throw new ParseException("Unknown color: " + colorString, 0);
}
}
private static int getHtmlColorInternal(@NonNull String colorString)
throws NumberFormatException, ParseException {
if (colorString.charAt(0) == '#') {
// Use a long to avoid rollovers on #ffXXXXXX
long color = Long.parseLong(colorString.substring(1), 16);
color |= 0x00000000ff000000;
return (int)color;
} else if (colorString.startsWith("rgb(") && colorString.endsWith(")")) {
String str = colorString.substring(4, colorString.length() - 1);
String[] colors = str.split("[\\s]*,[\\s]*");
if (colors.length == 3) {
return Color.argb(0xff, Integer.valueOf(colors[0]),
Integer.valueOf(colors[1]), Integer.valueOf(colors[2]));
}
} else {
Integer color = sColorNameMap.get(colorString.toLowerCase(Locale.US));
if (color != null) {
return color;
}
}
Log.e(TAG, "Unknown color: " + colorString);
throw new ParseException("Unknown color: " + colorString, 0);
}
private static final HashMap<String, Integer> sColorNameMap;
static {
sColorNameMap = new HashMap<>();
sColorNameMap.put("aliceblue", 0xFFF0F8FF);
sColorNameMap.put("antiquewhite", 0xFFFAEBD7);
sColorNameMap.put("aqua", 0xFF00FFFF);
sColorNameMap.put("aquamarine", 0xFF7FFFD4);
sColorNameMap.put("azure", 0xFFF0FFFF);
sColorNameMap.put("beige", 0xFFF5F5DC);
sColorNameMap.put("bisque", 0xFFFFE4C4);
sColorNameMap.put("black", 0xFF000000);
sColorNameMap.put("blanchedalmond", 0xFFFFEBCD);
sColorNameMap.put("blue", 0xFF0000FF);
sColorNameMap.put("blueviolet", 0xFF8A2BE2);
sColorNameMap.put("brown", 0xFFA52A2A);
sColorNameMap.put("burlywood", 0xFFDEB887);
sColorNameMap.put("cadetblue", 0xFF5F9EA0);
sColorNameMap.put("chartreuse", 0xFF7FFF00);
sColorNameMap.put("chocolate", 0xFFD2691E);
sColorNameMap.put("coral", 0xFFFF7F50);
sColorNameMap.put("cornflowerblue", 0xFF6495ED);
sColorNameMap.put("cornsilk", 0xFFFFF8DC);
sColorNameMap.put("crimson", 0xFFDC143C);
sColorNameMap.put("cyan", 0xFF00FFFF);
sColorNameMap.put("darkblue", 0xFF00008B);
sColorNameMap.put("darkcyan", 0xFF008B8B);
sColorNameMap.put("darkgoldenrod", 0xFFB8860B);
sColorNameMap.put("darkgray", 0xFFA9A9A9);
sColorNameMap.put("darkgrey", 0xFFA9A9A9);
sColorNameMap.put("darkgreen", 0xFF006400);
sColorNameMap.put("darkkhaki", 0xFFBDB76B);
sColorNameMap.put("darkmagenta", 0xFF8B008B);
sColorNameMap.put("darkolivegreen", 0xFF556B2F);
sColorNameMap.put("darkorange", 0xFFFF8C00);
sColorNameMap.put("darkorchid", 0xFF9932CC);
sColorNameMap.put("darkred", 0xFF8B0000);
sColorNameMap.put("darksalmon", 0xFFE9967A);
sColorNameMap.put("darkseagreen", 0xFF8FBC8F);
sColorNameMap.put("darkslateblue", 0xFF483D8B);
sColorNameMap.put("darkslategray", 0xFF2F4F4F);
sColorNameMap.put("darkslategrey", 0xFF2F4F4F);
sColorNameMap.put("darkturquoise", 0xFF00CED1);
sColorNameMap.put("darkviolet", 0xFF9400D3);
sColorNameMap.put("deeppink", 0xFFFF1493);
sColorNameMap.put("deepskyblue", 0xFF00BFFF);
sColorNameMap.put("dimgray", 0xFF696969);
sColorNameMap.put("dimgrey", 0xFF696969);
sColorNameMap.put("dodgerblue", 0xFF1E90FF);
sColorNameMap.put("firebrick", 0xFFB22222);
sColorNameMap.put("floralwhite", 0xFFFFFAF0);
sColorNameMap.put("forestgreen", 0xFF228B22);
sColorNameMap.put("fuchsia", 0xFFFF00FF);
sColorNameMap.put("gainsboro", 0xFFDCDCDC);
sColorNameMap.put("ghostwhite", 0xFFF8F8FF);
sColorNameMap.put("gold", 0xFFFFD700);
sColorNameMap.put("goldenrod", 0xFFDAA520);
sColorNameMap.put("gray", 0xFF808080);
sColorNameMap.put("grey", 0xFF808080);
sColorNameMap.put("green", 0xFF008000);
sColorNameMap.put("greenyellow", 0xFFADFF2F);
sColorNameMap.put("honeydew", 0xFFF0FFF0);
sColorNameMap.put("hotpink", 0xFFFF69B4);
sColorNameMap.put("indianred", 0xFFCD5C5C);
sColorNameMap.put("indigo", 0xFF4B0082);
sColorNameMap.put("ivory", 0xFFFFFFF0);
sColorNameMap.put("khaki", 0xFFF0E68C);
sColorNameMap.put("lavender", 0xFFE6E6FA);
sColorNameMap.put("lavenderblush", 0xFFFFF0F5);
sColorNameMap.put("lawngreen", 0xFF7CFC00);
sColorNameMap.put("lemonchiffon", 0xFFFFFACD);
sColorNameMap.put("lightblue", 0xFFADD8E6);
sColorNameMap.put("lightcoral", 0xFFF08080);
sColorNameMap.put("lightcyan", 0xFFE0FFFF);
sColorNameMap.put("lightgoldenrodyellow", 0xFFFAFAD2);
sColorNameMap.put("lightgray", 0xFFD3D3D3);
sColorNameMap.put("lightgrey", 0xFFD3D3D3);
sColorNameMap.put("lightgreen", 0xFF90EE90);
sColorNameMap.put("lightpink", 0xFFFFB6C1);
sColorNameMap.put("lightsalmon", 0xFFFFA07A);
sColorNameMap.put("lightseagreen", 0xFF20B2AA);
sColorNameMap.put("lightskyblue", 0xFF87CEFA);
sColorNameMap.put("lightslategray", 0xFF778899);
sColorNameMap.put("lightslategrey", 0xFF778899);
sColorNameMap.put("lightsteelblue", 0xFFB0C4DE);
sColorNameMap.put("lightyellow", 0xFFFFFFE0);
sColorNameMap.put("lime", 0xFF00FF00);
sColorNameMap.put("limegreen", 0xFF32CD32);
sColorNameMap.put("linen", 0xFFFAF0E6);
sColorNameMap.put("magenta", 0xFFFF00FF);
sColorNameMap.put("maroon", 0xFF800000);
sColorNameMap.put("mediumaquamarine", 0xFF66CDAA);
sColorNameMap.put("mediumblue", 0xFF0000CD);
sColorNameMap.put("mediumorchid", 0xFFBA55D3);
sColorNameMap.put("mediumpurple", 0xFF9370DB);
sColorNameMap.put("mediumseagreen", 0xFF3CB371);
sColorNameMap.put("mediumslateblue", 0xFF7B68EE);
sColorNameMap.put("mediumspringgreen", 0xFF00FA9A);
sColorNameMap.put("mediumturquoise", 0xFF48D1CC);
sColorNameMap.put("mediumvioletred", 0xFFC71585);
sColorNameMap.put("midnightblue", 0xFF191970);
sColorNameMap.put("mintcream", 0xFFF5FFFA);
sColorNameMap.put("mistyrose", 0xFFFFE4E1);
sColorNameMap.put("moccasin", 0xFFFFE4B5);
sColorNameMap.put("navajowhite", 0xFFFFDEAD);
sColorNameMap.put("navy", 0xFF000080);
sColorNameMap.put("oldlace", 0xFFFDF5E6);
sColorNameMap.put("olive", 0xFF808000);
sColorNameMap.put("olivedrab", 0xFF6B8E23);
sColorNameMap.put("orange", 0xFFFFA500);
sColorNameMap.put("orangered", 0xFFFF4500);
sColorNameMap.put("orchid", 0xFFDA70D6);
sColorNameMap.put("palegoldenrod", 0xFFEEE8AA);
sColorNameMap.put("palegreen", 0xFF98FB98);
sColorNameMap.put("paleturquoise", 0xFFAFEEEE);
sColorNameMap.put("palevioletred", 0xFFDB7093);
sColorNameMap.put("papayawhip", 0xFFFFEFD5);
sColorNameMap.put("peachpuff", 0xFFFFDAB9);
sColorNameMap.put("peru", 0xFFCD853F);
sColorNameMap.put("pink", 0xFFFFC0CB);
sColorNameMap.put("plum", 0xFFDDA0DD);
sColorNameMap.put("powderblue", 0xFFB0E0E6);
sColorNameMap.put("purple", 0xFF800080);
sColorNameMap.put("rebeccapurple", 0xFF663399);
sColorNameMap.put("red", 0xFFFF0000);
sColorNameMap.put("rosybrown", 0xFFBC8F8F);
sColorNameMap.put("royalblue", 0xFF4169E1);
sColorNameMap.put("saddlebrown", 0xFF8B4513);
sColorNameMap.put("salmon", 0xFFFA8072);
sColorNameMap.put("sandybrown", 0xFFF4A460);
sColorNameMap.put("seagreen", 0xFF2E8B57);
sColorNameMap.put("seashell", 0xFFFFF5EE);
sColorNameMap.put("sienna", 0xFFA0522D);
sColorNameMap.put("silver", 0xFFC0C0C0);
sColorNameMap.put("skyblue", 0xFF87CEEB);
sColorNameMap.put("slateblue", 0xFF6A5ACD);
sColorNameMap.put("slategray", 0xFF708090);
sColorNameMap.put("slategrey", 0xFF708090);
sColorNameMap.put("snow", 0xFFFFFAFA);
sColorNameMap.put("springgreen", 0xFF00FF7F);
sColorNameMap.put("steelblue", 0xFF4682B4);
sColorNameMap.put("tan", 0xFFD2B48C);
sColorNameMap.put("teal", 0xFF008080);
sColorNameMap.put("thistle", 0xFFD8BFD8);
sColorNameMap.put("tomato", 0xFFFF6347);
sColorNameMap.put("turquoise", 0xFF40E0D0);
sColorNameMap.put("violet", 0xFFEE82EE);
sColorNameMap.put("wheat", 0xFFF5DEB3);
sColorNameMap.put("white", 0xFFFFFFFF);
sColorNameMap.put("whitesmoke", 0xFFF5F5F5);
sColorNameMap.put("yellow", 0xFFFFFF00);
sColorNameMap.put("yellowgreen", 0xFF9ACD32);
}
}