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/*
* Copyright (C) 2013 Mohammed Lakkadshaw
*
* 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 org.sufficientlysecure.htmltextview;
import java.util.Vector;
import org.xml.sax.XMLReader;
import android.text.Editable;
import android.text.Html;
import android.text.Spannable;
import android.text.style.BulletSpan;
import android.text.style.LeadingMarginSpan;
import android.text.style.TypefaceSpan;
import android.util.Log;
public class HtmlTagHandler implements Html.TagHandler {
private int mListItemCount = 0;
private Vector<String> mListParents = new Vector<String>();
@Override
public void handleTag(final boolean opening, final String tag, Editable output, final XMLReader xmlReader) {
if (tag.equals("ul") || tag.equals("ol") || tag.equals("dd")) {
if (opening) {
mListParents.add(tag);
} else mListParents.remove(tag);
mListItemCount = 0;
} else if (tag.equals("li") && !opening) {
handleListTag(output);
} else if (tag.equalsIgnoreCase("code")) {
if (opening) {
output.setSpan(new TypefaceSpan("monospace"), output.length(), output.length(), Spannable.SPAN_MARK_MARK);
} else {
Log.d(HtmlTextView.TAG, "Code tag encountered");
Object obj = getLast(output, TypefaceSpan.class);
int where = output.getSpanStart(obj);
output.setSpan(new TypefaceSpan("monospace"), where, output.length(), 0);
}
}
}
private Object getLast(Editable text, Class kind) {
Object[] objs = text.getSpans(0, text.length(), kind);
if (objs.length == 0) {
return null;
} else {
for (int i = objs.length; i > 0; i--) {
if (text.getSpanFlags(objs[i - 1]) == Spannable.SPAN_MARK_MARK) {
return objs[i - 1];
}
}
return null;
}
}
private void handleListTag(Editable output) {
if (mListParents.lastElement().equals("ul")) {
output.append("\n");
String[] split = output.toString().split("\n");
int lastIndex = split.length - 1;
int start = output.length() - split[lastIndex].length() - 1;
output.setSpan(new BulletSpan(15 * mListParents.size()), start, output.length(), 0);
} else if (mListParents.lastElement().equals("ol")) {
mListItemCount++;
output.append("\n");
String[] split = output.toString().split("\n");
int lastIndex = split.length - 1;
int start = output.length() - split[lastIndex].length() - 1;
output.insert(start, mListItemCount + ". ");
output.setSpan(new LeadingMarginSpan.Standard(15 * mListParents.size()), start, output.length(), 0);
}
}
}
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