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Cheaper epub parsing (LNReader#1007)
* cheaper epub parsing * cleaner process * no empty page list * more epub detail * fix nullable
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android/app/src/main/java/com/rajarsheechatterjee/EpubUtil/EpubUtil.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,163 @@ | ||
| package com.rajarsheechatterjee.EpubUtil; | ||
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| import android.util.Xml; | ||
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| import androidx.annotation.NonNull; | ||
| import androidx.annotation.Nullable; | ||
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| import com.facebook.react.bridge.Promise; | ||
| import com.facebook.react.bridge.ReactApplicationContext; | ||
| import com.facebook.react.bridge.ReactContextBaseJavaModule; | ||
| import com.facebook.react.bridge.ReactMethod; | ||
| import com.facebook.react.bridge.ReadableMap; | ||
| import com.facebook.react.bridge.WritableArray; | ||
| import com.facebook.react.bridge.WritableMap; | ||
| import com.facebook.react.bridge.WritableNativeArray; | ||
| import com.facebook.react.bridge.WritableNativeMap; | ||
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| import org.xmlpull.v1.XmlPullParser; | ||
| import org.xmlpull.v1.XmlPullParserException; | ||
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| import java.io.File; | ||
| import java.io.FileInputStream; | ||
| import java.io.FileNotFoundException; | ||
| import java.io.IOException; | ||
| import java.util.HashMap; | ||
| import java.util.Objects; | ||
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| public class EpubUtil extends ReactContextBaseJavaModule { | ||
| EpubUtil(ReactApplicationContext context){super(context);} | ||
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| @NonNull | ||
| @Override | ||
| public String getName() { | ||
| return "EpubUtil"; | ||
| } | ||
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| private XmlPullParser initParse(File file) throws XmlPullParserException, IOException { | ||
| XmlPullParser parser = Xml.newPullParser(); | ||
| parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true); | ||
| parser.setInput(new FileInputStream(file), null); | ||
| parser.nextTag(); | ||
| return parser; | ||
| } | ||
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| private String readText(XmlPullParser parser) throws IOException, XmlPullParserException { | ||
| String result = ""; | ||
| if (parser.next() == XmlPullParser.TEXT) { | ||
| result = parser.getText(); | ||
| parser.nextTag(); | ||
| } | ||
| return result; | ||
| } | ||
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| private String cleanUrl(String url){ | ||
| if(url != null){ | ||
| return url.replaceFirst("#[^.]+?$", ""); | ||
| } | ||
| return null; | ||
| } | ||
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| @ReactMethod | ||
| public void parseNovelAndChapters(String epubDirPath, Promise promise) { | ||
| try { | ||
| File containerFile = new File(epubDirPath, "META-INF/container.xml"); | ||
| File contentMetaFile = new File(epubDirPath, getContentMetaFilePath(containerFile)); | ||
| String contentDir = contentMetaFile.getParent(); | ||
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| ReadableMap novel = getNovelMetadata(contentMetaFile, contentDir); | ||
| promise.resolve(novel); | ||
| } catch (XmlPullParserException | IOException e) { | ||
| promise.reject(e.getCause()); | ||
| } | ||
| } | ||
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| private String getContentMetaFilePath(File file) throws XmlPullParserException, IOException { | ||
| XmlPullParser parser = initParse(file); | ||
| while (parser.next() != XmlPullParser.END_TAG){ | ||
| @Nullable String tag = parser.getName(); | ||
| if(tag != null && tag.equals("rootfile")) { | ||
| return parser.getAttributeValue(null, "full-path"); | ||
| } | ||
| } | ||
| return "OEBPS/content.opf"; // default | ||
| } | ||
| private ReadableMap getNovelMetadata(File file, String contentDir) throws XmlPullParserException, IOException { | ||
| WritableMap novel = new WritableNativeMap(); | ||
| WritableArray chapters = new WritableNativeArray(); | ||
| XmlPullParser parser = initParse(file); | ||
| HashMap<String, String> refMap = new HashMap<>(); | ||
| HashMap<String, String> tocMap = new HashMap<>(); | ||
| File tocFile = new File(contentDir, "toc.ncx"); | ||
| if(tocFile.exists()){ | ||
| XmlPullParser tocParser = initParse(tocFile); | ||
| String label = null; | ||
| while (tocParser.next() != XmlPullParser.END_DOCUMENT){ | ||
| String tag = tocParser.getName(); | ||
| if(tag != null){ | ||
| if(tag.equals("text")){ | ||
| label = readText(tocParser); | ||
| }else if(tag.equals("content")){ | ||
| String href = cleanUrl(tocParser.getAttributeValue(null, "src")); | ||
| if(href != null){ | ||
| tocMap.put(href, label); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| String cover = null; | ||
| while (parser.next() != XmlPullParser.END_DOCUMENT){ | ||
| @Nullable String tag = parser.getName(); | ||
| if(tag != null){ | ||
| switch (tag) { | ||
| case "item": { | ||
| String id = parser.getAttributeValue(null, "id"); | ||
| String href = parser.getAttributeValue(null, "href"); | ||
| if (id != null) { | ||
| refMap.put(id, href); | ||
| } | ||
| break; | ||
| } | ||
| case "itemref": { | ||
| String idRef = parser.getAttributeValue(null, "idref"); | ||
| String href = refMap.get(idRef); | ||
| if (href != null) { | ||
| WritableMap chapter = new WritableNativeMap(); | ||
| chapter.putString("path", contentDir + "/" + href); | ||
| String name = tocMap.get(href); | ||
| chapter.putString("name", name == null ? href : name); | ||
| chapters.pushMap(chapter); | ||
| } | ||
| break; | ||
| } | ||
| case "title": | ||
| novel.putString("name", readText(parser)); | ||
| break; | ||
| case "creator": | ||
| novel.putString("author", readText(parser)); | ||
| break; | ||
| case "contributor": | ||
| novel.putString("artist", readText(parser)); | ||
| break; | ||
| case "description": | ||
| novel.putString("summary", readText(parser)); | ||
| break; | ||
| case "meta": | ||
| String metaName = parser.getAttributeValue(null, "name"); | ||
| if(metaName != null && metaName.equals("cover")){ | ||
| cover = parser.getAttributeValue(null, "content"); | ||
| } | ||
| break; | ||
| } | ||
| parser.next(); | ||
| } | ||
| } | ||
| if(cover != null){ | ||
| String coverPath = contentDir + "/" + refMap.get(cover); | ||
| novel.putString("cover", coverPath); | ||
| } | ||
| novel.putArray("chapters", chapters); | ||
| return novel; | ||
| } | ||
| } |
33 changes: 33 additions & 0 deletions
33
android/app/src/main/java/com/rajarsheechatterjee/EpubUtil/EpubUtilPackage.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package com.rajarsheechatterjee.EpubUtil; | ||
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| import androidx.annotation.NonNull; | ||
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| import com.facebook.react.ReactPackage; | ||
| import com.facebook.react.bridge.NativeModule; | ||
| import com.facebook.react.bridge.ReactApplicationContext; | ||
| import com.facebook.react.uimanager.ViewManager; | ||
| import com.rajarsheechatterjee.ZipArchive.ZipArchive; | ||
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| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
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| public class EpubUtilPackage implements ReactPackage { | ||
| @NonNull | ||
| @Override | ||
| public List<NativeModule> createNativeModules(@NonNull ReactApplicationContext reactApplicationContext) { | ||
| List<NativeModule> modules = new ArrayList<>(); | ||
| try { | ||
| modules.add(new EpubUtil(reactApplicationContext)); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| return modules; | ||
| } | ||
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| @NonNull | ||
| @Override | ||
| public List<ViewManager> createViewManagers(@NonNull ReactApplicationContext reactApplicationContext) { | ||
| return Collections.emptyList(); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| import { SourceNovel } from '@plugins/types'; | ||
| import { NativeModules } from 'react-native'; | ||
| interface EpubUtilInterface { | ||
| parseNovelAndChapters: (epubDirPath: string) => Promise<SourceNovel>; | ||
| } | ||
| const { EpubUtil } = NativeModules; | ||
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| export default EpubUtil as EpubUtilInterface; |
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