mirror of https://github.com/moparisthebest/k-9
480 lines
16 KiB
Java
480 lines
16 KiB
Java
package com.fsck.k9.view;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.List;
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import android.content.ActivityNotFoundException;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.PackageManager;
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import android.content.pm.ResolveInfo;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.net.Uri;
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import android.os.AsyncTask;
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import android.os.Environment;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.view.View.OnLongClickListener;
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import android.widget.Button;
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import android.widget.FrameLayout;
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import android.widget.ImageView;
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import android.widget.TextView;
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import android.widget.Toast;
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import com.fsck.k9.Account;
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import com.fsck.k9.K9;
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import com.fsck.k9.R;
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import com.fsck.k9.cache.TemporaryAttachmentStore;
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import com.fsck.k9.controller.MessagingController;
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import com.fsck.k9.controller.MessagingListener;
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import com.fsck.k9.helper.FileHelper;
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import com.fsck.k9.helper.MediaScannerNotifier;
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import com.fsck.k9.helper.SizeFormatter;
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import com.fsck.k9.mail.Message;
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import com.fsck.k9.mail.MessagingException;
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import com.fsck.k9.mail.Part;
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import com.fsck.k9.mail.internet.MimeHeader;
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import com.fsck.k9.mail.internet.MimeUtility;
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import com.fsck.k9.mailstore.LocalAttachmentBodyPart;
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import com.fsck.k9.provider.AttachmentProvider;
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import org.apache.commons.io.IOUtils;
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public class AttachmentView extends FrameLayout implements OnClickListener, OnLongClickListener {
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private Context context;
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private Message message;
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private LocalAttachmentBodyPart part;
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private Account account;
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private MessagingController controller;
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private MessagingListener listener;
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private AttachmentFileDownloadCallback callback;
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private Button viewButton;
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private Button downloadButton;
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private String name;
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private String contentType;
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private long size;
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public AttachmentView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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this.context = context;
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}
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public AttachmentView(Context context, AttributeSet attrs) {
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super(context, attrs);
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this.context = context;
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}
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public AttachmentView(Context context) {
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super(context);
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this.context = context;
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}
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public void setButtonsEnabled(boolean enabled) {
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viewButton.setEnabled(enabled);
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downloadButton.setEnabled(enabled);
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}
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/**
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* Populates this view with information about the attachment.
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* <p>
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* This method also decides which attachments are displayed when the "show attachments" button
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* is pressed, and which attachments are only displayed after the "show more attachments"
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* button was pressed.<br>
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* Inline attachments with content ID and unnamed attachments fall into the second category.
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* </p>
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*
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* @return {@code true} for a regular attachment. {@code false} for attachments that should be initially hidden.
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*/
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public boolean populateFromPart(Part inputPart, Message message, Account account,
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MessagingController controller, MessagingListener listener) throws MessagingException {
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part = (LocalAttachmentBodyPart) inputPart;
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this.message = message;
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this.account = account;
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this.controller = controller;
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this.listener = listener;
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boolean firstClassAttachment = extractAttachmentInformation(part);
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displayAttachmentInformation();
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return firstClassAttachment;
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}
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//TODO: extract this code to a helper class
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private boolean extractAttachmentInformation(Part part) throws MessagingException {
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boolean firstClassAttachment = true;
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contentType = part.getMimeType();
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String contentTypeHeader = MimeUtility.unfoldAndDecode(part.getContentType());
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String contentDisposition = MimeUtility.unfoldAndDecode(part.getDisposition());
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name = MimeUtility.getHeaderParameter(contentTypeHeader, "name");
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if (name == null) {
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name = MimeUtility.getHeaderParameter(contentDisposition, "filename");
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}
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if (name == null) {
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firstClassAttachment = false;
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String extension = MimeUtility.getExtensionByMimeType(contentType);
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name = "noname" + ((extension != null) ? "." + extension : "");
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}
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// Inline parts with a content-id are almost certainly components of an HTML message
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// not attachments. Only show them if the user pressed the button to show more
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// attachments.
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if (contentDisposition != null &&
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MimeUtility.getHeaderParameter(contentDisposition, null).matches("^(?i:inline)")
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&& part.getHeader(MimeHeader.HEADER_CONTENT_ID) != null) {
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firstClassAttachment = false;
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}
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String sizeParam = MimeUtility.getHeaderParameter(contentDisposition, "size");
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if (sizeParam != null) {
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try {
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size = Integer.parseInt(sizeParam);
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} catch (NumberFormatException e) { /* ignore */ }
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}
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return firstClassAttachment;
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}
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private void displayAttachmentInformation() {
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TextView attachmentName = (TextView) findViewById(R.id.attachment_name);
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TextView attachmentInfo = (TextView) findViewById(R.id.attachment_info);
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viewButton = (Button) findViewById(R.id.view);
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downloadButton = (Button) findViewById(R.id.download);
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if (size > K9.MAX_ATTACHMENT_DOWNLOAD_SIZE) {
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viewButton.setVisibility(View.GONE);
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downloadButton.setVisibility(View.GONE);
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}
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viewButton.setOnClickListener(this);
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downloadButton.setOnClickListener(this);
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downloadButton.setOnLongClickListener(this);
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attachmentName.setText(name);
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attachmentInfo.setText(SizeFormatter.formatSize(context, size));
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ImageView thumbnail = (ImageView) findViewById(R.id.attachment_icon);
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new LoadAndDisplayThumbnailAsyncTask(thumbnail).execute();
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}
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@Override
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public void onClick(View view) {
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switch (view.getId()) {
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case R.id.view: {
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onViewButtonClicked();
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break;
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}
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case R.id.download: {
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onSaveButtonClicked();
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break;
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}
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}
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}
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@Override
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public boolean onLongClick(View view) {
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if (view.getId() == R.id.download) {
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callback.pickDirectoryToSaveAttachmentTo(this);
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return true;
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}
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return false;
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}
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private void onViewButtonClicked() {
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if (message != null) {
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controller.loadAttachment(account, message, part, new Object[] {false, this}, listener);
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}
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}
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private void onSaveButtonClicked() {
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boolean isExternalStorageMounted = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
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if (!isExternalStorageMounted) {
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String message = context.getString(R.string.message_view_status_attachment_not_saved);
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displayMessageToUser(message);
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return;
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}
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if (message != null) {
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controller.loadAttachment(account, message, part, new Object[] {true, this}, listener);
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}
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}
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public void writeFile() {
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writeFile(new File(K9.getAttachmentDefaultPath()));
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}
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/**
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* Saves the attachment as file in the given directory
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*/
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public void writeFile(File directory) {
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try {
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File file = saveAttachmentWithUniqueFileName(directory);
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displayAttachmentSavedMessage(file.toString());
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MediaScannerNotifier.notify(context, file);
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} catch (IOException ioe) {
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if (K9.DEBUG) {
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Log.e(K9.LOG_TAG, "Error saving attachment", ioe);
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}
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displayAttachmentNotSavedMessage();
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}
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}
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private File saveAttachmentWithUniqueFileName(File directory) throws IOException {
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String filename = FileHelper.sanitizeFilename(name);
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File file = FileHelper.createUniqueFile(directory, filename);
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writeAttachmentToStorage(file);
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return file;
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}
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private void writeAttachmentToStorage(File file) throws IOException {
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Uri uri = AttachmentProvider.getAttachmentUri(account, part.getAttachmentId());
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InputStream in = context.getContentResolver().openInputStream(uri);
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try {
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OutputStream out = new FileOutputStream(file);
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try {
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IOUtils.copy(in, out);
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out.flush();
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} finally {
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out.close();
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}
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} finally {
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in.close();
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}
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}
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public void showFile() {
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new ViewAttachmentAsyncTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
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}
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private Intent getBestViewIntentAndSaveFileIfNecessary() {
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String inferredMimeType = MimeUtility.getMimeTypeByExtension(name);
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IntentAndResolvedActivitiesCount resolvedIntentInfo;
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if (MimeUtility.isDefaultMimeType(contentType)) {
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resolvedIntentInfo = getBestViewIntentForMimeType(inferredMimeType);
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} else {
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resolvedIntentInfo = getBestViewIntentForMimeType(contentType);
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if (!resolvedIntentInfo.hasResolvedActivities() && !inferredMimeType.equals(contentType)) {
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resolvedIntentInfo = getBestViewIntentForMimeType(inferredMimeType);
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}
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}
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if (!resolvedIntentInfo.hasResolvedActivities()) {
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resolvedIntentInfo = getBestViewIntentForMimeType(MimeUtility.DEFAULT_ATTACHMENT_MIME_TYPE);
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}
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Intent viewIntent;
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if (resolvedIntentInfo.hasResolvedActivities() && resolvedIntentInfo.containsFileUri()) {
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try {
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File tempFile = TemporaryAttachmentStore.getFileForWriting(context, name);
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writeAttachmentToStorage(tempFile);
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viewIntent = createViewIntentForFileUri(resolvedIntentInfo.getMimeType(), Uri.fromFile(tempFile));
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} catch (IOException e) {
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if (K9.DEBUG) {
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Log.e(K9.LOG_TAG, "Error while saving attachment to use file:// URI with ACTION_VIEW Intent", e);
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}
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viewIntent = createViewIntentForAttachmentProviderUri(MimeUtility.DEFAULT_ATTACHMENT_MIME_TYPE);
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}
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} else {
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viewIntent = resolvedIntentInfo.getIntent();
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}
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return viewIntent;
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}
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private IntentAndResolvedActivitiesCount getBestViewIntentForMimeType(String mimeType) {
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Intent contentUriIntent = createViewIntentForAttachmentProviderUri(mimeType);
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int contentUriActivitiesCount = getResolvedIntentActivitiesCount(contentUriIntent);
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if (contentUriActivitiesCount > 0) {
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return new IntentAndResolvedActivitiesCount(contentUriIntent, contentUriActivitiesCount);
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}
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File tempFile = TemporaryAttachmentStore.getFile(context, name);
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Uri tempFileUri = Uri.fromFile(tempFile);
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Intent fileUriIntent = createViewIntentForFileUri(mimeType, tempFileUri);
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int fileUriActivitiesCount = getResolvedIntentActivitiesCount(fileUriIntent);
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if (fileUriActivitiesCount > 0) {
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return new IntentAndResolvedActivitiesCount(fileUriIntent, fileUriActivitiesCount);
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}
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return new IntentAndResolvedActivitiesCount(contentUriIntent, contentUriActivitiesCount);
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}
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private Intent createViewIntentForAttachmentProviderUri(String mimeType) {
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Uri uri = AttachmentProvider.getAttachmentUriForViewing(account, part.getAttachmentId(), mimeType, name);
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Intent intent = new Intent(Intent.ACTION_VIEW);
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intent.setDataAndType(uri, mimeType);
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intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
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addUiIntentFlags(intent);
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return intent;
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}
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private Intent createViewIntentForFileUri(String mimeType, Uri uri) {
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Intent intent = new Intent(Intent.ACTION_VIEW);
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intent.setDataAndType(uri, mimeType);
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addUiIntentFlags(intent);
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return intent;
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}
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private void addUiIntentFlags(Intent intent) {
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intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
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}
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private int getResolvedIntentActivitiesCount(Intent intent) {
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PackageManager packageManager = context.getPackageManager();
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List<ResolveInfo> resolveInfos =
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packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
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return resolveInfos.size();
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}
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private void displayAttachmentSavedMessage(final String filename) {
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String message = context.getString(R.string.message_view_status_attachment_saved, filename);
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displayMessageToUser(message);
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}
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private void displayAttachmentNotSavedMessage() {
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String message = context.getString(R.string.message_view_status_attachment_not_saved);
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displayMessageToUser(message);
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}
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private void displayMessageToUser(String message) {
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Toast.makeText(context, message, Toast.LENGTH_LONG).show();
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}
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public void setCallback(AttachmentFileDownloadCallback callback) {
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this.callback = callback;
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}
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public interface AttachmentFileDownloadCallback {
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/**
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* This method is called to ask the user to pick a directory to save the attachment to.
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* <p/>
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* After the user has selected a directory, the implementation of this interface has to call
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* {@link #writeFile(File)} on the object supplied as argument in order for the attachment to be saved.
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*/
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public void pickDirectoryToSaveAttachmentTo(AttachmentView caller);
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}
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private static class IntentAndResolvedActivitiesCount {
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private Intent intent;
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private int activitiesCount;
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IntentAndResolvedActivitiesCount(Intent intent, int activitiesCount) {
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this.intent = intent;
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this.activitiesCount = activitiesCount;
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}
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public Intent getIntent() {
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return intent;
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}
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public boolean hasResolvedActivities() {
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return activitiesCount > 0;
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}
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public String getMimeType() {
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return intent.getType();
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}
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public boolean containsFileUri() {
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return "file".equals(intent.getData().getScheme());
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}
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}
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private class LoadAndDisplayThumbnailAsyncTask extends AsyncTask<Void, Void, Bitmap> {
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private final ImageView thumbnail;
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public LoadAndDisplayThumbnailAsyncTask(ImageView thumbnail) {
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this.thumbnail = thumbnail;
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}
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protected Bitmap doInBackground(Void... asyncTaskArgs) {
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return getPreviewIcon();
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}
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private Bitmap getPreviewIcon() {
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Bitmap icon = null;
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try {
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InputStream input = context.getContentResolver().openInputStream(
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AttachmentProvider.getAttachmentThumbnailUri(account,
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part.getAttachmentId(),
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62,
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62));
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icon = BitmapFactory.decodeStream(input);
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input.close();
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} catch (Exception e) {
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// We don't care what happened, we just return null for the preview icon.
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}
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return icon;
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}
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protected void onPostExecute(Bitmap previewIcon) {
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if (previewIcon != null) {
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thumbnail.setImageBitmap(previewIcon);
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} else {
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thumbnail.setImageResource(R.drawable.attached_image_placeholder);
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}
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}
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}
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private class ViewAttachmentAsyncTask extends AsyncTask<Void, Void, Intent> {
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@Override
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protected void onPreExecute() {
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viewButton.setEnabled(false);
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}
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@Override
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protected Intent doInBackground(Void... params) {
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return getBestViewIntentAndSaveFileIfNecessary();
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}
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@Override
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protected void onPostExecute(Intent intent) {
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viewAttachment(intent);
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viewButton.setEnabled(true);
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}
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private void viewAttachment(Intent intent) {
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try {
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context.startActivity(intent);
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} catch (ActivityNotFoundException e) {
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Log.e(K9.LOG_TAG, "Could not display attachment of type " + contentType, e);
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String message = context.getString(R.string.message_view_no_viewer, contentType);
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displayMessageToUser(message);
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}
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}
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}
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}
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