Init

.gitignore

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+# User-specific stuff
+.idea/
+
+*.iml
+*.ipr
+*.iws
+
+# IntelliJ
+out/
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# Windows thumbnail cache files
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+.gradle
+build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Cache of project
+.gradletasknamecache
+
+**/build/
+
+# Common working directory
+run/
+runs/
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar

LICENSE.txt

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+The MIT License (MIT)
+
+Copyright (c) 2026 
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

build.gradle

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+plugins {
+    id 'fabric-loom' version '1.15-SNAPSHOT'
+    id 'maven-publish'
+}
+
+version = project.mod_version
+group = project.maven_group
+
+base {
+    archivesName = project.archives_base_name
+}
+
+
+repositories {
+    // Add repositories to retrieve artifacts from in here.
+    // You should only use this when depending on other mods because
+    // Loom adds the essential maven repositories to download Minecraft and libraries from automatically.
+    // See https://docs.gradle.org/current/userguide/declaring_repositories.html
+    // for more information about repositories.
+}
+
+dependencies {
+    // To change the versions see the gradle.properties file
+    minecraft "com.mojang:minecraft:${project.minecraft_version}"
+    mappings loom.officialMojangMappings()
+    modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"
+
+}
+
+processResources {
+    inputs.property "version", project.version
+    inputs.property "minecraft_version", project.minecraft_version
+    inputs.property "loader_version", project.loader_version
+    filteringCharset "UTF-8"
+
+    filesMatching("fabric.mod.json") {
+        expand "version": project.version,
+                "minecraft_version": project.minecraft_version,
+                "loader_version": project.loader_version
+    }
+}
+
+def targetJavaVersion = 21
+tasks.withType(JavaCompile).configureEach {
+    // ensure that the encoding is set to UTF-8, no matter what the system default is
+    // this fixes some edge cases with special characters not displaying correctly
+    // see http://yodaconditions.net/blog/fix-for-java-file-encoding-problems-with-gradle.html
+    // If Javadoc is generated, this must be specified in that task too.
+    it.options.encoding = "UTF-8"
+    if (targetJavaVersion >= 10 || JavaVersion.current().isJava10Compatible()) {
+        it.options.release.set(targetJavaVersion)
+    }
+}
+
+java {
+    def javaVersion = JavaVersion.toVersion(targetJavaVersion)
+    if (JavaVersion.current() < javaVersion) {
+        toolchain.languageVersion = JavaLanguageVersion.of(targetJavaVersion)
+    }
+    // Loom will automatically attach sourcesJar to a RemapSourcesJar task and to the "build" task
+    // if it is present.
+    // If you remove this line, sources will not be generated.
+    withSourcesJar()
+}
+
+jar {
+    from("LICENSE") {
+        rename { "${it}_${project.archives_base_name}" }
+    }
+}
+
+// configure the maven publication
+publishing {
+    publications {
+        create("mavenJava", MavenPublication) {
+            artifactId = project.archives_base_name
+            from components.java
+        }
+    }
+
+    // See https://docs.gradle.org/current/userguide/publishing_maven.html for information on how to set up publishing.
+    repositories {
+        // Add repositories to publish to here.
+        // Notice: This block does NOT have the same function as the block in the top level.
+        // The repositories here will be used for publishing your artifact, not for
+        // retrieving dependencies.
+    }
+}

gradle.properties

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+# Done to increase the memory available to gradle.
+org.gradle.jvmargs=-Xmx1G
+# Fabric Properties
+# check these on https://modmuss50.me/fabric.html
+minecraft_version=1.21.11
+loader_version=0.18.4
+# Mod Properties
+mod_version=1.0+1.21.1
+maven_group=com.lukasabbe
+archives_base_name=NotEnoughPages
+

gradle/wrapper/gradle-wrapper.properties

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+distributionUrl=https\://services.gradle.org/distributions/gradle-9.2.1-bin.zip

settings.gradle

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+pluginManagement {
+    repositories {
+        maven {
+            name = 'Fabric'
+            url = 'https://maven.fabricmc.net/'
+        }
+        gradlePluginPortal()
+    }
+}

src/main/java/com/lukasabbe/notenoughpages/Notenoughpages.java

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+package com.lukasabbe.notenoughpages;
+
+import com.lukasabbe.notenoughpages.mixin.BookEditScreenAccessor;
+import com.lukasabbe.notenoughpages.mixin.MultiLineEditBoxAccessor;
+import com.lukasabbe.notenoughpages.mixin.MultilineTextFieldMixin;
+import net.fabricmc.api.ModInitializer;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.components.MultiLineEditBox;
+import net.minecraft.client.gui.components.MultilineTextField;
+import net.minecraft.client.gui.screens.Screen;
+import net.minecraft.client.gui.screens.inventory.BookEditScreen;
+import net.minecraft.util.StringUtil;
+
+public class Notenoughpages implements ModInitializer {
+    @Override
+    public void onInitialize() {}
+
+    public static void handlePaste(String content){
+        Screen guiScreen = Minecraft.getInstance().screen;
+        if(guiScreen == null) return;
+        if(guiScreen instanceof BookEditScreen bookEditScreen){
+            MultiLineEditBox page = ((BookEditScreenAccessor) bookEditScreen).getPage();
+            MultilineTextField textField = ((MultiLineEditBoxAccessor) page).getTextField();
+
+            if(((MultilineTextFieldMixin) textField).getSelecting()) return;
+            if(textField.cursor() != ((MultilineTextFieldMixin) textField).getSelectCursor()) return;
+            if(IsContentCorrectLength(content, textField)) return;
+
+            while(true){
+                System.out.println(((BookEditScreenAccessor) bookEditScreen).getPagesAmount());
+                if(((BookEditScreenAccessor) bookEditScreen).getPagesAmount() == 99){
+                    return;
+                }
+
+                if(IsContentCorrectLength(content, textField)){
+                    textField.insertText(content);
+                    return;
+                }
+
+                String[] split = splitString(content, textField);
+
+                textField.insertText(split[0]);
+                content = split[1];
+
+                ((BookEditScreenAccessor) bookEditScreen).nextPage();
+                page = ((BookEditScreenAccessor) bookEditScreen).getPage();
+                textField = ((MultiLineEditBoxAccessor) page).getTextField();
+            }
+
+        }
+    }
+
+    public static String[] splitString(String content, MultilineTextField field){
+        int low = 0;
+        int high = content.length();
+        int splitIndex = 0;
+
+        while(low <= high){
+            int mid = low + (high - low) / 2;
+
+            String sub = content.substring(0, mid);
+
+            if (((MultilineTextFieldMixin)field).overflowsLineLimitInvoker(sub)){
+                high = mid - 1;
+            } else {
+                splitIndex = mid;
+                low = mid + 1;
+            }
+        }
+
+        String insertString = content.substring(0, splitIndex);
+        String overflow = content.substring(splitIndex);
+        return new String[] { insertString, overflow };
+    }
+
+    public static boolean IsContentCorrectLength(String content, MultilineTextField field){
+        String truncated = ((MultilineTextFieldMixin) field).truncateInsertionTextInvoker(StringUtil.filterText(content, true));
+        int selectCursor = ((MultilineTextFieldMixin) field).getSelectCursor();
+        int cursor = field.cursor();
+        int beginIndex = Math.min(selectCursor, cursor);
+        int endIndex  = Math.max(selectCursor, cursor);
+        String bookContent = (new StringBuilder(((MultilineTextFieldMixin)field).getValue())).replace(beginIndex, endIndex, truncated).toString();
+
+        return !((MultilineTextFieldMixin) field).overflowsLineLimitInvoker(bookContent);
+    }
+}

src/main/java/com/lukasabbe/notenoughpages/mixin/BookEditScreenAccessor.java

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+package com.lukasabbe.notenoughpages.mixin;
+
+import net.minecraft.client.gui.components.MultiLineEditBox;
+import net.minecraft.client.gui.screens.inventory.BookEditScreen;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+@Mixin(BookEditScreen.class)
+public interface BookEditScreenAccessor {
+    @Accessor("page")
+    MultiLineEditBox getPage();
+
+    @Invoker("pageForward")
+    void nextPage();
+
+    @Invoker("getNumPages")
+    int getPagesAmount();
+}

src/main/java/com/lukasabbe/notenoughpages/mixin/BookEditScreenMixin.java

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+package com.lukasabbe.notenoughpages.mixin;
+
+import net.minecraft.client.gui.screens.inventory.BookEditScreen;
+import org.spongepowered.asm.mixin.Mixin;
+
+@Mixin(BookEditScreen.class)
+public class BookEditScreenMixin {
+}

src/main/java/com/lukasabbe/notenoughpages/mixin/MultiLineEditBoxAccessor.java

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+package com.lukasabbe.notenoughpages.mixin;
+
+import net.minecraft.client.gui.components.MultiLineEditBox;
+import net.minecraft.client.gui.components.MultilineTextField;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+@Mixin(MultiLineEditBox.class)
+public interface MultiLineEditBoxAccessor {
+    @Accessor("textField")
+    MultilineTextField getTextField();
+}

src/main/java/com/lukasabbe/notenoughpages/mixin/MultilineTextFieldMixin.java

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+package com.lukasabbe.notenoughpages.mixin;
+
+import net.minecraft.client.gui.components.MultilineTextField;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+@Mixin(MultilineTextField.class)
+public interface MultilineTextFieldMixin {
+    @Invoker("truncateInsertionText")
+    String truncateInsertionTextInvoker(String string);
+
+    @Invoker("overflowsLineLimit")
+    boolean overflowsLineLimitInvoker(String string);
+
+    @Accessor("value")
+    String getValue();
+
+    @Accessor("selectCursor")
+    int getSelectCursor();
+
+    @Accessor("selecting")
+    boolean getSelecting();
+}

src/main/java/com/lukasabbe/notenoughpages/mixin/PasteContentMixin.java

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+package com.lukasabbe.notenoughpages.mixin;
+
+import com.lukasabbe.notenoughpages.Notenoughpages;
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.components.MultilineTextField;
+import net.minecraft.client.input.KeyEvent;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(MultilineTextField.class)
+public class PasteContentMixin {
+    @Inject(method = "keyPressed",at= @At(value = "INVOKE", target = "Lnet/minecraft/client/gui/components/MultilineTextField;insertText(Ljava/lang/String;)V", ordinal = 0))
+    public void getPasteContent(KeyEvent keyEvent, CallbackInfoReturnable<Boolean> cir){
+        Notenoughpages.handlePaste(Minecraft.getInstance().keyboardHandler.getClipboard());
+    }
+}

src/main/resources/fabric.mod.json

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+{
+  "schemaVersion": 1,
+  "id": "notenoughpages",
+  "version": "${version}",
+  "name": "NotEnoughPages",
+  "description": "",
+  "authors": [],
+  "contact": {},
+  "license": "MIT",
+  "icon": "assets/notenoughpages/icon.png",
+  "environment": "*",
+  "entrypoints": {
+    "main": [
+      "com.lukasabbe.notenoughpages.Notenoughpages"
+    ]
+  },
+  "mixins": [
+    "notenoughpages.mixins.json"
+  ],
+  "depends": {
+    "fabricloader": ">=${loader_version}",
+    "minecraft": "${minecraft_version}"
+  }
+}

src/main/resources/notenoughpages.mixins.json

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+{
+  "required": true,
+  "minVersion": "0.8",
+  "package": "com.lukasabbe.notenoughpages.mixin",
+  "compatibilityLevel": "JAVA_21",
+  "mixins": [
+    "PasteContentMixin"
+  ],
+  "client": [
+    "BookEditScreenAccessor",
+    "BookEditScreenMixin",
+    "MultiLineEditBoxAccessor",
+    "MultilineTextFieldMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  },
+  "overwrites": {
+    "requireAnnotations": true
+  }
+}