diff --git a/.github/workflows/npm-publish.yml b/.github/workflows/npm-publish.yml deleted file mode 100644 index 6b0b23a..0000000 --- a/.github/workflows/npm-publish.yml +++ /dev/null @@ -1,67 +0,0 @@ -name: Publish NPM package - -on: - push: - branches: - - main - -jobs: - publish: - runs-on: ubuntu-latest - steps: - - uses: actions/checkout@v2 - with: - fetch-depth: 0 - - - name: Setup Node.js - uses: actions/setup-node@v2 - with: - node-version: '20' - registry-url: 'https://registry.npmjs.org' - - - name: Install dependencies - run: npm install - - - name: Check the version - id: check - run: | - CURRENT_VERSION=$(jq -r .version package.json) - echo "Current version: $CURRENT_VERSION" - LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0") - echo "Latest tag: $LATEST_TAG" - - LATEST_VERSION=${LATEST_TAG#v} - - if [ "$LATEST_VERSION" != "$CURRENT_VERSION" ]; - then - echo "Version changed" - echo "version_changed=true" >> $GITHUB_OUTPUT - echo "new_version=$CURRENT_VERSION" >> $GITHUB_OUTPUT - else - echo "Version not changed" - echo "version_changed=false" >> $GITHUB_OUTPUT - fi - - - name: Build - run: npm run build - if: steps.check.outputs.version_changed == 'true' - - - name: Publish - if: steps.check.outputs.version_changed == 'true' - run: npm publish --access public --no-git-checks - env: - NODE_AUTH_TOKEN: ${{ secrets.NPM_ACCESS_TOKEN }} - - - name: Tag release - if: steps.check.outputs.version_changed == 'true' - run: | - git config --local user.email "github-actions[bot]@users.noreply.github.com" - git config --local user.name "github-actions[bot]" - git tag -a "v${{ steps.check.outputs.new_version }}" -m "v${{ steps.check.outputs.new_version }}" - git push origin "v${{ steps.check.outputs.new_version }}" - - - - - - \ No newline at end of file diff --git a/LICENSE b/LICENSE index 6a97962..23b44a3 100644 --- a/LICENSE +++ b/LICENSE @@ -1,6 +1,6 @@ MIT License -Copyright (c) 2024 Utkarsh Pancholi +Copyright (c) 2025 Javier Bagatoli Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal diff --git a/README.md b/README.md index 953748e..4d1f54e 100644 --- a/README.md +++ b/README.md @@ -1,58 +1,174 @@ -# react-pdftotext +# react-pdftotext-advanced -Light-weight memory-safe client library for extracting plain text from pdf files. +A browser-based PDF text extraction library that preserves the original reading experience by reconstructing paragraphs and page breaks. -## Installing +Unlike the original `react-pdftotext`, which returns a continuous stream of text, **react-pdftotext-advanced** analyzes the extracted content to preserve paragraph separation and page spacing, producing text that is much closer to the original document. -Using npm: +## Why? -```js -npm install react-pdftotext +Most browser PDF extraction libraries prioritize extracting text, not readability. + +For example, a document like this: + +```text +Good morning everyone. + +How are you all? + +I hope you're well. ``` -## Example +may become: -**Local File Input** +```text +Good morning everyone.How are you all?I hope you're well. +``` -Now add a input tag with type="file" to take file input. +With **react-pdftotext-advanced**, the output becomes: -```html - +```text +Good morning everyone. + +How are you all? + +I hope you're well. ``` -Import the pdf2text function from package +This makes the extracted text much easier to: + +- Read +- Display +- Process with AI models (LLMs) +- Index +- Summarize +- Search + +--- + +# Features -```js -import pdfToText from "react-pdftotext"; +- Preserves paragraph separation. +- Detects page endings. +- Produces human-readable output. +- Runs entirely in the browser. +- No backend required. +- Promise-based API. +- Easy integration with React applications. + +--- + +# Installation + +```bash +npm install react-pdftotext-advanced +``` + +--- + +# Basic Usage + +```tsx +import pdfToText from "react-pdftotext-advanced"; function extractText(event) { - const file = event.target.files[0]; - pdfToText(file) - .then((text) => console.log(text)) - .catch((error) => console.error("Failed to extract text from pdf")); + const file = event.target.files[0]; + + pdfToText(file, "advanced") + .then((text) => console.log(text)) + .catch((error) => console.error(error)); } ``` -**Remote PDF File Input** +```html + +``` -For Pdf files stored at remote locations +--- -```js -import pdfToText from 'react-pdftotext' +# Extraction Modes -const pdf_url = "REMOTE_PDF_URL" +## Simple -function extractText() { - const file = await fetch(pdf_url) - .then(res => res.blob()) - .catch(error => console.error(error)) +Returns the text using the original extraction behavior. - pdfToText(file) - .then(text => console.log(text)) - .catch(error => console.error("Failed to extract text from pdf")) -} +```ts +pdfToText(file, "simple"); +``` + +Output + +```text +Good morning everyone.How are you all?I hope you're well. +``` + +--- + +## Advanced + +Reconstructs paragraph breaks and page spacing for improved readability. + +```ts +pdfToText(file, "advanced"); +``` + +Output + +```text +Good morning everyone. + +How are you all? + +I hope you're well. ``` -## Contributing +--- + +# Use Cases + +This library is particularly useful for: + +- Reading letters and documents +- AI preprocessing (LLMs) +- Retrieval-Augmented Generation (RAG) +- Search indexing +- Document summarization +- PDF viewers +- Educational platforms + +--- + +# How It Works + +After extracting the raw text from the PDF, the library analyzes spacing and page transitions to reconstruct the document's logical reading order. + +Instead of returning a continuous stream of text, it attempts to preserve the visual structure that a reader expects. + +--- + +# Browser Support + +Supports modern browsers that are compatible with PDF.js. + +--- + +# Credits + +This project is based on the excellent work of **react-pdftotext** and extends its functionality by improving the readability of the extracted text. + +--- + +# Contributing + +Contributions, bug reports and feature requests are always welcome. + +If you have ideas for improving text reconstruction or supporting additional document layouts, feel free to open an issue or submit a pull request. + +--- + +# License -This project welcomes contributions and suggestions. +MIT \ No newline at end of file diff --git a/aux-funcitons.ts b/aux-funcitons.ts new file mode 100644 index 0000000..a016c4a --- /dev/null +++ b/aux-funcitons.ts @@ -0,0 +1,17 @@ +const calculateStartLine = (controlPosX: {[key: string]: number}): number => { + let vectorKeys = Object.keys(controlPosX); + let moreUsualValue: {key:string, value: number} = {key:'', value: 0}; + + vectorKeys.forEach(key => { + if(controlPosX[key] > moreUsualValue.value){ + moreUsualValue = { + key, + value: controlPosX[key] as number + } + } + }) + + return (Number(moreUsualValue.key)+2) +} + +export default calculateStartLine; \ No newline at end of file diff --git a/index.ts b/index.ts index 095fd9e..210c70d 100644 --- a/index.ts +++ b/index.ts @@ -1,4 +1,5 @@ import { pdfjs } from "react-pdf"; +import calculateStartLine from "./aux-funcitons"; // Path to the pdf.worker.js file pdfjs.GlobalWorkerOptions.workerSrc = `//cdnjs.cloudflare.com/ajax/libs/pdf.js/${pdfjs.version}/pdf.worker.mjs`; @@ -42,4 +43,123 @@ const pdfToText = async (file: File | Blob | MediaSource): Promise => { return extractedText; }; -export default pdfToText; +/** + * Extracts text content from a PDF file. + * @param {File | Blob | MediaSource} file - The PDF file to extract text from. + * @param lineSpacing - is space inter line an line standart + * @returns {Promise} A promise that resolves with the extracted text content. + */ +const pdfToTextLikePDF = async (file: File | Blob | MediaSource, lineSpacing: number = 1): Promise => { + // Create a blob URL for the PDF file + const blobUrl = URL.createObjectURL(file); + + // Load the PDF file + const loadingTask = pdfjs.getDocument(blobUrl); + + let extractedText = ""; + try { + const pdf = await loadingTask.promise; + const numPages = pdf.numPages; + + // Iterate through each page and extract text + let lastPage = 1 + + let sizeFontProm = 10; + let totalFontSize = 0; + let totalTokens = 0; + + let controlPosX: {[key: string]: number} = {} + for (let pageNumber = 1; pageNumber <= numPages && pageNumber <= 5; pageNumber++) { + const page = await pdf.getPage(pageNumber); + const textContent = await page.getTextContent(); + + textContent.items.map((item) => { + if("height" in item){ + if(item.height > 3 && item.str){ + totalFontSize = totalFontSize + item.height; + totalTokens++ + } + + const name: string =(((item.transform[4]).toString()).split ('.'))[0] + controlPosX[name] = (controlPosX[name] || 0) + 1 + } + }) + } + sizeFontProm = totalFontSize/totalTokens; + + const startLine = calculateStartLine(controlPosX); + + for (let pageNumber = 1; pageNumber <= numPages; pageNumber++) { + const page = await pdf.getPage(pageNumber); + const textContent = await page.getTextContent(); + + let lastToken = '' + let lastLastPositionY = 0 + let lastPositionY = 0 + + const pageText = textContent.items + .map((item, index) => { + if("str" in item){ + lastToken = '' + + lastLastPositionY = lastPositionY + lastPositionY = item.transform[5] + + //Encabezado + if(lastLastPositionY >= 790){ + lastToken = '\n' + } + //Is end of Page? + if(lastPage < pageNumber && pageNumber !== 1){ + lastToken = '\n', + lastPage++ + } + + //Is end of line + if(index > 1 && (lastLastPositionY-(sizeFontProm*1.6*lineSpacing) > item.transform[5])){ + lastToken = '\n' + } + + //Is new parrafo + if(lastLastPositionY-(sizeFontProm*lineSpacing) > item.transform[5] + && item.transform[4] > startLine + ){ + lastToken = '\n' + } + + //Is a foot of page + if((index > 0 && lastLastPositionY < item.transform[5] )){ + lastToken = '\n' + } + + //Is a jump + if(lastPositionY === 0){ + lastToken = '\n' + } + + return lastToken + (item.str === ''? ' ': '') + item.str + }}) + .join(''); + extractedText += pageText; + } + } catch (error) { + throw new Error(`Failed to extract text from PDF: ${error}`); + } finally { + // Clean up the blob URL + URL.revokeObjectURL(blobUrl); + + // Free memory from loading task + loadingTask.destroy(); + } + return extractedText; +}; + +const selectModeToExtract = async (file: File | Blob | MediaSource, mode: 'simple' | 'advanced', lineSpacing: number = 1): Promise => { + if (mode === 'simple') { + return pdfToText(file); + } else { + return pdfToTextLikePDF(file,lineSpacing); + } +} + +export default selectModeToExtract; diff --git a/package-lock.json b/package-lock.json index 40b68ea..a7b71b6 100644 --- a/package-lock.json +++ b/package-lock.json @@ -1,6 +1,6 @@ { "name": "react-pdftotext", - "version": "1.3.4", + "version": "1.3.9", "lockfileVersion": 3, "requires": true, "packages": { diff --git a/package.json b/package.json index 31eb6b4..658df14 100644 --- a/package.json +++ b/package.json @@ -1,10 +1,16 @@ { - "name": "react-pdftotext", - "version": "1.3.4", + "name": "react-pdftotext-advanced", + "version": "1.3.9", "description": "A simple light weight react package to extract plain text from a pdf file.", - "main": "dist/index.js", - "module": "dist/index.js", + "main": "./dist/index.js", "types": "dist/index.d.ts", + "type": "module", + "exports": { + ".": { + "types": "./dist/index.d.ts", + "import": "./dist/index.js" + } + }, "scripts": { "test": "echo \"Error: no test specified\" && exit 1", "build": "tsc", @@ -12,7 +18,7 @@ }, "repository": { "type": "git", - "url": "https://github.com/Utkarsh212/react-pdftotext.git" + "url": "https://github.com/JavierBagatoli/react-pdftotext.git" }, "keywords": [ "react-pdf", @@ -22,9 +28,10 @@ "react", "pdf2text", "pdfjs", - "pdf-to-text" + "pdf-to-text", + "typescript" ], - "author": "Utkarsh Pancholi", + "author": "Javier Bagatoli", "license": "MIT", "dependencies": { "pdfjs-dist": "^4.6.82", @@ -34,3 +41,5 @@ "typescript": 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