gitea/legado
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优化

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This commit is contained in:
gedoor 2022-01-06 16:39:12 +08:00
parent 48b1fab765
commit 39a1b43a46
1 changed files with 15 additions and 15 deletions
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30
app/src/main/java/io/legado/app/model/localBook/TextFile.kt
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@ -15,6 +15,14 @@ import java.util.regex.Pattern
class TextFile(private val book: Book) { class TextFile(private val book: Book) {
private val blank: Byte = 0x0a
//默认从文件中获取数据的长度
private val bufferSize = 512000
//没有标题的时候，每个章节的最大长度
private val maxLengthWithNoToc = 10 * 1024
private val tocRules = arrayListOf<TxtTocRule>() private val tocRules = arrayListOf<TxtTocRule>()
private var charset: Charset = book.fileCharset() private var charset: Charset = book.fileCharset()
@ -22,7 +30,7 @@ class TextFile(private val book: Book) {
fun getChapterList(): ArrayList<BookChapter> { fun getChapterList(): ArrayList<BookChapter> {
val rulePattern: Pattern? = if (book.charset == null || book.tocUrl.isEmpty()) { val rulePattern: Pattern? = if (book.charset == null || book.tocUrl.isEmpty()) {
LocalBook.getBookInputStream(book).use { bis -> LocalBook.getBookInputStream(book).use { bis ->
val buffer = ByteArray(BUFFER_SIZE) val buffer = ByteArray(bufferSize)
var blockContent: String var blockContent: String
var length = bis.read(buffer) var length = bis.read(buffer)
book.charset = EncodingDetect.getEncode(buffer) book.charset = EncodingDetect.getEncode(buffer)
@ -55,10 +63,10 @@ class TextFile(private val book: Book) {
var blockPos = 0 var blockPos = 0
//读取的长度 //读取的长度
var length: Int var length: Int
val buffer = ByteArray(BUFFER_SIZE) val buffer = ByteArray(bufferSize)
var bufferStart = 0 var bufferStart = 0
//获取文件中的数据到buffer，直到没有数据为止 //获取文件中的数据到buffer，直到没有数据为止
while (bis.read(buffer, bufferStart, BUFFER_SIZE - bufferStart) while (bis.read(buffer, bufferStart, bufferSize - bufferStart)
.also { length = it } > 0 .also { length = it } > 0
) { ) {
blockPos++ blockPos++
@ -66,7 +74,7 @@ class TextFile(private val book: Book) {
if (pattern != null) { if (pattern != null) {
var end = bufferStart + length var end = bufferStart + length
for (i in bufferStart + length - 1 downTo 0) { for (i in bufferStart + length - 1 downTo 0) {
if (buffer[i] == BLANK) { if (buffer[i] == blank) {
end = i end = i
break break
} }
@ -160,11 +168,11 @@ class TextFile(private val book: Book) {
while (strLength > 0) { while (strLength > 0) {
++chapterPos ++chapterPos
//是否长度超过一章 //是否长度超过一章
if (strLength > MAX_LENGTH_WITH_NO_CHAPTER) { //在buffer中一章的终止点 if (strLength > maxLengthWithNoToc) { //在buffer中一章的终止点
var end = length var end = length
//寻找换行符作为终止点 //寻找换行符作为终止点
for (i in chapterOffset + MAX_LENGTH_WITH_NO_CHAPTER until length) { for (i in chapterOffset + maxLengthWithNoToc until length) {
if (buffer[i] == BLANK) { if (buffer[i] == blank) {
end = i end = i
break break
} }
@ -249,14 +257,6 @@ class TextFile(private val book: Book) {
companion object { companion object {
private const val BLANK: Byte = 0x0a
//默认从文件中获取数据的长度
private const val BUFFER_SIZE = 512000
//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
@Throws(FileNotFoundException::class) @Throws(FileNotFoundException::class)
fun getChapterList(book: Book): ArrayList<BookChapter> { fun getChapterList(book: Book): ArrayList<BookChapter> {
return TextFile(book).getChapterList() return TextFile(book).getChapterList()