| /* |
| * Copyright (C) 2012 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.android.mail.utils; |
| |
| import com.google.common.collect.ImmutableMap; |
| |
| import android.content.Context; |
| import android.text.TextUtils; |
| |
| import com.android.mail.R; |
| import com.android.mail.providers.Attachment; |
| |
| import java.text.DecimalFormat; |
| import java.util.Map; |
| |
| public class AttachmentUtils { |
| private static final int KILO = 1024; |
| private static final int MEGA = KILO * KILO; |
| |
| /** |
| * Singleton map of MIME->friendly description |
| * @see #getMimeTypeDisplayName(Context, String) |
| */ |
| private static Map<String, String> sDisplayNameMap; |
| |
| /** |
| * @return A string suitable for display in bytes, kilobytes or megabytes |
| * depending on its size. |
| */ |
| public static String convertToHumanReadableSize(Context context, long size) { |
| if (size < KILO) { |
| return size + context.getString(R.string.bytes); |
| } else if (size < MEGA) { |
| return (size / KILO) + context.getString(R.string.kilobytes); |
| } else { |
| DecimalFormat onePlace = new DecimalFormat("0.#"); |
| return onePlace.format((float) size / (float) MEGA) |
| + context.getString(R.string.megabytes); |
| } |
| } |
| |
| /** |
| * Return a friendly localized file type for this attachment, or the empty string if |
| * unknown. |
| * @param context a Context to do resource lookup against |
| * @return friendly file type or empty string |
| */ |
| public static String getDisplayType(final Context context, final Attachment attachment) { |
| // try to get a friendly name for the exact mime type |
| // then try to show a friendly name for the mime family |
| // finally, give up and just show the file extension |
| String displayType = getMimeTypeDisplayName(context, attachment.contentType); |
| int index = !TextUtils.isEmpty(attachment.contentType) ? attachment.contentType |
| .indexOf('/') : -1; |
| if (displayType == null && index > 0) { |
| displayType = getMimeTypeDisplayName(context, |
| attachment.contentType.substring(0, index)); |
| } |
| if (displayType == null) { |
| String extension = Utils.getFileExtension(attachment.name); |
| // show '$EXTENSION File' for unknown file types |
| if (extension != null && extension.length() > 1 && extension.indexOf('.') == 0) { |
| displayType = context.getString(R.string.attachment_unknown, |
| extension.substring(1).toUpperCase()); |
| } |
| } |
| if (displayType == null) { |
| // no extension to display, but the map doesn't accept null entries |
| displayType = ""; |
| } |
| return displayType; |
| } |
| |
| /** |
| * Returns a user-friendly localized description of either a complete a MIME type or a |
| * MIME family. |
| * @param context used to look up localized strings |
| * @param type complete MIME type or just MIME family |
| * @return localized description text, or null if not recognized |
| */ |
| public static synchronized String getMimeTypeDisplayName(final Context context, |
| String type) { |
| if (sDisplayNameMap == null) { |
| String docName = context.getString(R.string.attachment_application_msword); |
| String presoName = context.getString(R.string.attachment_application_vnd_ms_powerpoint); |
| String sheetName = context.getString(R.string.attachment_application_vnd_ms_excel); |
| |
| sDisplayNameMap = new ImmutableMap.Builder<String, String>() |
| .put("image", context.getString(R.string.attachment_image)) |
| .put("audio", context.getString(R.string.attachment_audio)) |
| .put("video", context.getString(R.string.attachment_video)) |
| .put("text", context.getString(R.string.attachment_text)) |
| .put("application/pdf", context.getString(R.string.attachment_application_pdf)) |
| |
| // Documents |
| .put("application/msword", docName) |
| .put("application/vnd.openxmlformats-officedocument.wordprocessingml.document", |
| docName) |
| |
| // Presentations |
| .put("application/vnd.ms-powerpoint", |
| presoName) |
| .put("application/vnd.openxmlformats-officedocument.presentationml.presentation", |
| presoName) |
| |
| // Spreadsheets |
| .put("application/vnd.ms-excel", sheetName) |
| .put("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", |
| sheetName) |
| |
| .build(); |
| } |
| return sDisplayNameMap.get(type); |
| } |
| } |