116 lines
3.8 KiB
Java
116 lines
3.8 KiB
Java
package app.grapheneos.pdfviewer.loader;
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import android.content.Context;
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import android.graphics.Typeface;
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import android.text.SpannableStringBuilder;
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import android.text.Spanned;
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import android.text.style.StyleSpan;
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import android.util.Log;
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import androidx.loader.content.AsyncTaskLoader;
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import org.json.JSONException;
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import org.json.JSONObject;
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import java.text.ParseException;
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import java.util.ArrayList;
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import java.util.List;
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import app.grapheneos.pdfviewer.R;
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import app.grapheneos.pdfviewer.Utils;
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public class DocumentPropertiesLoader extends AsyncTaskLoader<List<CharSequence>> {
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public static final String TAG = "DocumentPropertiesLoader";
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public static final int ID = 1;
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private final String mProperties;
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private final int mNumPages;
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String fileName;
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Long fileSize;
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public DocumentPropertiesLoader(Context context, String properties, int numPages, String fileName, Long fileSize) {
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super(context);
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mProperties = properties;
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mNumPages = numPages;
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this.fileName = fileName;
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this.fileSize = fileSize;
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}
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@Override
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public List<CharSequence> loadInBackground() {
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final Context context = getContext();
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final String[] names = context.getResources().getStringArray(R.array.property_names);
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final List<CharSequence> properties = new ArrayList<>(names.length);
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properties.add(getProperty(null, names[0], fileName));
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properties.add(getProperty(null, names[1], Utils.parseFileSize(fileSize)));
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try {
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final JSONObject json = new JSONObject(mProperties);
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properties.add(getProperty(json, names[2], "Title"));
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properties.add(getProperty(json, names[3], "Author"));
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properties.add(getProperty(json, names[4], "Subject"));
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properties.add(getProperty(json, names[5], "Keywords"));
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properties.add(getProperty(json, names[6], "CreationDate"));
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properties.add(getProperty(json, names[7], "ModDate"));
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properties.add(getProperty(json, names[8], "Producer"));
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properties.add(getProperty(json, names[9], "Creator"));
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properties.add(getProperty(json, names[10], "PDFFormatVersion"));
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properties.add(getProperty(null, names[11], String.valueOf(mNumPages)));
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return properties;
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} catch (JSONException e) {
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e.printStackTrace();
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}
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return null;
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}
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@Override
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public void deliverResult(List<CharSequence> properties) {
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if (!isReset() && isStarted()) {
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super.deliverResult(properties);
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}
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}
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@Override
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protected void onStartLoading() {
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forceLoad();
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}
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@Override
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protected void onStopLoading() {
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cancelLoad();
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}
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@Override
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protected void onReset() {
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super.onReset();
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onStopLoading();
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}
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private CharSequence getProperty(final JSONObject json, String name, String specName) {
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final SpannableStringBuilder property = new SpannableStringBuilder(name).append(":\n");
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final String value = json != null ? json.optString(specName, "-") : specName;
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if (specName != null && specName.endsWith("Date")) {
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final Context context = getContext();
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try {
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property.append(value.equals("-") ? value : Utils.parseDate(value));
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} catch (ParseException e) {
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Log.w(TAG, e.getMessage() + " for " + value + " at offset: " + e.getErrorOffset());
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property.append(context.getString(R.string.document_properties_invalid_date));
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}
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} else {
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property.append(value);
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}
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property.setSpan(new StyleSpan(Typeface.BOLD), 0, name.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
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return property;
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}
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}
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