k
/
legado
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

feat: 优化代码

Browse Source
pull/198/head
kunfei 5 years ago
parent 15c87eb6fa
commit d830dab1d2
3 changed files with 97 additions and 68 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 109
      app/src/main/java/io/legado/app/model/localBook/AnalyzeTxtFile.kt
  2. 2
      app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt
  3. 2
      app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt

109
app/src/main/java/io/legado/app/model/localBook/AnalyzeTxtFile.kt
Unescape View File

@ -13,34 +13,43 @@ import java.nio.charset.Charset
import java.util.regex.Matcher
import java.util.regex.Pattern
object AnalyzeTxtFile {
private const val folderName = "bookTxt"
private const val BLANK: Byte = 0x0a
//默认从文件中获取数据的长度
private const val BUFFER_SIZE = 512 * 1024
class AnalyzeTxtFile {
//没有标题的时候，每个章节的最大长度
private const val MAX_LENGTH_WITH_NO_CHAPTER = 10 * 1024
val cacheFolder: File by lazy {
val rootFile = App.INSTANCE.getExternalFilesDir(null)
?: App.INSTANCE.externalCacheDir
?: App.INSTANCE.cacheDir
FileUtils.createFolderIfNotExist(rootFile, subDirs = *arrayOf(folderName))
}
private val tocRules = arrayListOf<TxtTocRule>()
private lateinit var charset: Charset
fun analyze(context: Context, book: Book): ArrayList<BookChapter> {
val bookFile = getBookFile(context, book)
book.charset = EncodingDetect.getEncode(bookFile)
val charset = book.fileCharset()
val toc = arrayListOf<BookChapter>()
charset = book.fileCharset()
val rulePattern = if (book.tocUrl.isNotEmpty()) {
Pattern.compile(book.tocUrl, Pattern.MULTILINE)
} else {
tocRules.addAll(getTocRules())
null
}
//获取文件流
val bookStream = RandomAccessFile(bookFile, "r")
val rulePattern = getTocRule(book, bookStream, charset)
return analyze(bookStream, book, rulePattern)
}
private fun analyze(
bookStream: RandomAccessFile,
book: Book,
pattern: Pattern?
): ArrayList<BookChapter> {
val toc = arrayListOf<BookChapter>()
var tocRule: TxtTocRule? = null
val rulePattern = pattern ?: let {
tocRule = getTocRule(bookStream)
tocRule?.let {
Pattern.compile(it.rule, Pattern.MULTILINE)
}
}
//加载章节
val buffer = ByteArray(BUFFER_SIZE)
//获取到的块起始点，在文件中的位置
bookStream.seek(0)
var curOffset: Long = 0
//block的个数
var blockPos = 0
@ -70,6 +79,10 @@ object AnalyzeTxtFile {
val chapterStart = matcher.start()
//获取章节内容
val chapterContent = blockContent.substring(seekPos, chapterStart)
if (chapterContent.length > 30000 && pattern == null) {
tocRules.remove(tocRule)
return analyze(bookStream, book, null)
}
//如果 seekPos == 0 && nextChapterPos != 0 表示当前block处前面有一段内容
//第一种情况一定是序章 第二种情况可能是上一个章节的内容
if (seekPos == 0 && chapterStart != 0) { //获取当前章节的内容
@ -161,9 +174,46 @@ object AnalyzeTxtFile {
System.gc()
System.runFinalization()
tocRule?.let {
book.tocUrl = it.rule
}
return toc
}
private fun getTocRule(bookStream: RandomAccessFile): TxtTocRule? {
var txtTocRule: TxtTocRule? = null
//首先获取128k的数据
val buffer = ByteArray(BUFFER_SIZE / 4)
val length = bookStream.read(buffer, 0, buffer.size)
val content = String(buffer, 0, length, charset)
for (tocRule in tocRules) {
val pattern = Pattern.compile(tocRule.rule, Pattern.MULTILINE)
val matcher = pattern.matcher(content)
if (matcher.find()) {
txtTocRule = tocRule
break
}
}
return txtTocRule
}
companion object {
private const val folderName = "bookTxt"
private const val BLANK: Byte = 0x0a
//默认从文件中获取数据的长度
private const val BUFFER_SIZE = 512 * 1024
//没有标题的时候，每个章节的最大长度
private const val MAX_LENGTH_WITH_NO_CHAPTER = 10 * 1024
val cacheFolder: File by lazy {
val rootFile = App.INSTANCE.getExternalFilesDir(null)
?: App.INSTANCE.externalCacheDir
?: App.INSTANCE.cacheDir
FileUtils.createFolderIfNotExist(rootFile, subDirs = *arrayOf(folderName))
}
fun getContent(book: Book, bookChapter: BookChapter): String {
val bookFile = getBookFile(App.INSTANCE, book)
//获取文件流
@ -190,29 +240,6 @@ object AnalyzeTxtFile {
return File(book.bookUrl)
}
private fun getTocRule(book: Book, bookStream: RandomAccessFile, charset: Charset): Pattern? {
if (book.tocUrl.isNotEmpty()) {
return Pattern.compile(book.tocUrl, Pattern.MULTILINE)
}
val tocRules = getTocRules()
var rulePattern: Pattern? = null
//首先获取128k的数据
val buffer = ByteArray(BUFFER_SIZE / 4)
val length = bookStream.read(buffer, 0, buffer.size)
val content = String(buffer, 0, length, charset)
for (tocRule in tocRules) {
val pattern = Pattern.compile(tocRule.rule, Pattern.MULTILINE)
val matcher = pattern.matcher(content)
if (matcher.find()) {
book.tocUrl = tocRule.rule
rulePattern = pattern
break
}
}
bookStream.seek(0)
return rulePattern
}
private fun getTocRules(): List<TxtTocRule> {
val rules = App.db.txtTocRule().all
if (rules.isEmpty()) {
@ -230,4 +257,6 @@ object AnalyzeTxtFile {
}
return emptyList()
}
}
}

2
app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt
Unescape View File

@ -81,7 +81,7 @@ class BookInfoViewModel(application: Application) : BaseViewModel(application) {
) {
execute {
if (book.isLocalBook()) {
AnalyzeTxtFile.analyze(context, book).let {
AnalyzeTxtFile().analyze(context, book).let {
App.db.bookDao().update(book)
App.db.bookChapterDao().insert(*it.toTypedArray())
chapterListData.postValue(it)

2
app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
Unescape View File

@ -102,7 +102,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
) {
execute {
if (book.isLocalBook()) {
AnalyzeTxtFile.analyze(context, book).let {
AnalyzeTxtFile().analyze(context, book).let {
App.db.bookChapterDao().delByBook(book.bookUrl)
App.db.bookChapterDao().insert(*it.toTypedArray())
App.db.bookDao().update(book)

Write Preview
Loading…
Cancel
Save