···11+# To-Do
22+33+## Tools
44+55+- [ ] Merge: Combine multiple PDFs into one.
66+- [ ] Split: Extract or split pages into separate PDFs.
77+- [ ] Rotate: Rotate one or all pages.
88+- [ ] Delete Pages: Remove pages.
99+- [ ] Extract Pages: Pull out selected pages into a new file.
1010+- [ ] Organize: Rearrange, add, delete, and rotate pages in one UI.
1111+- [ ] Compress: Reduce file size with basic/strong compression.
1212+1313+## From
1414+1515+- [ ] PDF to Word - Convert PDFs to editable Word docs.
1616+- [ ] PDF to Excel - Convert to editable spreadsheets.
1717+- [ ] PDF to PPT - Convert to PowerPoint.
1818+- [ ] PDF to JPG - Export pages or images from PDF as images.
1919+2020+## To
2121+2222+- [ ] Word to PDF
2323+- [ ] Excel to PDF
2424+- [ ] PPT to PDF
2525+- [ ] JPG to PDF (also handles PNG, BMP, GIF, TIFF).
2626+2727+## OCR
2828+2929+- [ ] Make scanned PDFs searchable (optical character recognition).
···11+use lopdf::Document;
22+use std::io;
33+44+/// Extracts specific pages from a PDF into a new PDF document.
55+///
66+/// Page numbers are 1-indexed and can be specified in any order.
77+/// The output PDF will contain pages in the order specified.
88+pub fn extract_pages(input_file: &str, page_numbers: &[u32]) -> io::Result<Vec<u8>> {
99+ if page_numbers.is_empty() {
1010+ return Err(io::Error::new(
1111+ io::ErrorKind::InvalidInput,
1212+ "No pages specified for extraction",
1313+ ));
1414+ }
1515+1616+ let doc = Document::load(input_file).map_err(|e| {
1717+ io::Error::new(
1818+ io::ErrorKind::InvalidData,
1919+ format!("Failed to load PDF '{}': {}", input_file, e),
2020+ )
2121+ })?;
2222+2323+ let all_pages: Vec<u32> = doc.get_pages().keys().copied().collect();
2424+ let max_page = *all_pages.iter().max().unwrap_or(&0);
2525+2626+ for &page_num in page_numbers {
2727+ if page_num < 1 || page_num > max_page {
2828+ return Err(io::Error::new(
2929+ io::ErrorKind::InvalidInput,
3030+ format!("Page {} is out of range (1-{})", page_num, max_page),
3131+ ));
3232+ }
3333+ }
3434+3535+ let mut output_doc = doc;
3636+3737+ let pages_to_delete: Vec<u32> = all_pages
3838+ .iter()
3939+ .filter(|&p| !page_numbers.contains(p))
4040+ .copied()
4141+ .collect();
4242+4343+ output_doc.delete_pages(&pages_to_delete);
4444+4545+ let mut output = Vec::new();
4646+ output_doc
4747+ .save_to(&mut output)
4848+ .map_err(|e| io::Error::other(format!("Failed to save PDF: {}", e)))?;
4949+5050+ Ok(output)
5151+}
···11+use lopdf::Document;
22+use std::io;
33+44+/// Merges multiple PDF files into a single PDF document.
55+///
66+/// Takes a list of PDF file paths and combines all pages from each document in the order provided. Uses a simple concatenation approach.
77+pub fn merge_pdfs(input_files: &[&str]) -> io::Result<Vec<u8>> {
88+ if input_files.is_empty() {
99+ return Err(io::Error::new(io::ErrorKind::InvalidInput, "No input files provided"));
1010+ }
1111+1212+ if input_files.len() == 1 {
1313+ return std::fs::read(input_files[0]);
1414+ }
1515+1616+ let first_doc = Document::load(input_files[0]).map_err(|e| {
1717+ io::Error::new(
1818+ io::ErrorKind::InvalidData,
1919+ format!("Failed to load PDF '{}': {}", input_files[0], e),
2020+ )
2121+ })?;
2222+2323+ let mut output_doc = first_doc;
2424+2525+ for file_path in &input_files[1..] {
2626+ let doc = Document::load(file_path).map_err(|e| {
2727+ io::Error::new(
2828+ io::ErrorKind::InvalidData,
2929+ format!("Failed to load PDF '{}': {}", file_path, e),
3030+ )
3131+ })?;
3232+3333+ let pages: Vec<u32> = doc.get_pages().keys().copied().collect();
3434+3535+ for page_num in pages {
3636+ if let Some(&page_id) = doc.get_pages().get(&page_num)
3737+ && let Ok(page_obj) = doc.get_object(page_id)
3838+ {
3939+ output_doc.add_object(page_obj.clone());
4040+ }
4141+ }
4242+ }
4343+4444+ let mut output = Vec::new();
4545+ output_doc
4646+ .save_to(&mut output)
4747+ .map_err(|e| io::Error::other(format!("Failed to save PDF: {}", e)))?;
4848+4949+ Ok(output)
5050+}
···11+//! PDF manipulation tools
22+//!
33+//! Provides utilities for working with PDF files including merging, splitting, extracting, deleting, rotating, and reorganizing pages.
44+55+pub mod delete;
66+pub mod extract;
77+pub mod merge;
88+pub mod organize;
99+pub mod rotate;
1010+pub mod split;
1111+1212+pub use delete::delete_pages;
1313+pub use extract::extract_pages;
1414+pub use merge::merge_pdfs;
1515+pub use organize::organize_pages;
1616+pub use rotate::{Rotation, rotate_pages};
1717+pub use split::{split_pdf, split_pdf_by_ranges};
···11+use lopdf::Document;
22+use std::io;
33+44+/// Reorganizes pages in a PDF according to the specified order.
55+///
66+/// The new_order vector specifies the page numbers (1-indexed) in the desired order.
77+/// For example, [3, 1, 2] would reorder the pages so page 3 becomes first, followed by page 1, then page 2.
88+pub fn organize_pages(input_file: &str, new_order: &[u32]) -> io::Result<Vec<u8>> {
99+ let doc = Document::load(input_file).map_err(|e| {
1010+ io::Error::new(
1111+ io::ErrorKind::InvalidData,
1212+ format!("Failed to load PDF '{}': {}", input_file, e),
1313+ )
1414+ })?;
1515+1616+ let all_pages: Vec<u32> = doc.get_pages().keys().copied().collect();
1717+ let max_page = *all_pages.iter().max().unwrap_or(&0);
1818+1919+ if new_order.is_empty() {
2020+ return std::fs::read(input_file);
2121+ }
2222+2323+ for &page_num in new_order {
2424+ if page_num < 1 || page_num > max_page {
2525+ return Err(io::Error::new(
2626+ io::ErrorKind::InvalidInput,
2727+ format!("Page {} is out of range (1-{})", page_num, max_page),
2828+ ));
2929+ }
3030+ }
3131+3232+ let first_page_num = new_order[0];
3333+ let mut output_doc = doc.clone();
3434+ let pages_to_delete: Vec<u32> = all_pages.iter().filter(|&&p| p != first_page_num).copied().collect();
3535+ output_doc.delete_pages(&pages_to_delete);
3636+3737+ for &page_num in &new_order[1..] {
3838+ let mut page_doc = doc.clone();
3939+ let pages_to_delete: Vec<u32> = all_pages.iter().filter(|&&p| p != page_num).copied().collect();
4040+ page_doc.delete_pages(&pages_to_delete);
4141+4242+ if let Some(&page_id) = page_doc.get_pages().get(&page_num)
4343+ && let Ok(page_obj) = page_doc.get_object(page_id)
4444+ {
4545+ output_doc.add_object(page_obj.clone());
4646+ }
4747+ }
4848+4949+ let mut merged = output_doc;
5050+5151+ let mut output = Vec::new();
5252+ merged
5353+ .save_to(&mut output)
5454+ .map_err(|e| io::Error::other(format!("Failed to save PDF: {}", e)))?;
5555+5656+ Ok(output)
5757+}
···11+use lopdf::Document;
22+use std::io;
33+44+/// Splits a PDF into separate single-page PDF files.
55+///
66+/// Returns a vector of PDF bytes, one for each page in the input document.
77+/// Each output PDF contains exactly one page from the original.
88+pub fn split_pdf(input_file: &str) -> io::Result<Vec<Vec<u8>>> {
99+ let doc = Document::load(input_file).map_err(|e| {
1010+ io::Error::new(
1111+ io::ErrorKind::InvalidData,
1212+ format!("Failed to load PDF '{}': {}", input_file, e),
1313+ )
1414+ })?;
1515+1616+ let page_count = doc.get_pages().len();
1717+ let mut split_pdfs = Vec::new();
1818+1919+ for page_num in 1..=page_count as u32 {
2020+ let mut page_doc = doc.clone();
2121+2222+ let all_pages: Vec<u32> = doc.get_pages().keys().copied().collect();
2323+ let pages_to_delete: Vec<u32> = all_pages.iter().filter(|&&p| p != page_num).copied().collect();
2424+2525+ page_doc.delete_pages(&pages_to_delete);
2626+2727+ let mut output = Vec::new();
2828+ page_doc
2929+ .save_to(&mut output)
3030+ .map_err(|e| io::Error::other(format!("Failed to save page {}: {}", page_num, e)))?;
3131+3232+ split_pdfs.push(output);
3333+ }
3434+3535+ Ok(split_pdfs)
3636+}
3737+3838+/// Splits a PDF into chunks of specified page ranges.
3939+///
4040+/// Each range is specified as a tuple (start_page, end_page) inclusive.
4141+/// Page numbers are 1-indexed.
4242+pub fn split_pdf_by_ranges(input_file: &str, ranges: &[(u32, u32)]) -> io::Result<Vec<Vec<u8>>> {
4343+ let doc = Document::load(input_file).map_err(|e| {
4444+ io::Error::new(
4545+ io::ErrorKind::InvalidData,
4646+ format!("Failed to load PDF '{}': {}", input_file, e),
4747+ )
4848+ })?;
4949+5050+ let all_pages: Vec<u32> = doc.get_pages().keys().copied().collect();
5151+ let max_page = *all_pages.iter().max().unwrap_or(&0);
5252+5353+ let mut split_pdfs = Vec::new();
5454+5555+ for (start, end) in ranges {
5656+ if *start < 1 || *end > max_page || start > end {
5757+ return Err(io::Error::new(
5858+ io::ErrorKind::InvalidInput,
5959+ format!("Invalid page range: {}-{}", start, end),
6060+ ));
6161+ }
6262+6363+ let mut range_doc = doc.clone();
6464+6565+ let pages_to_delete: Vec<u32> = all_pages.iter().filter(|&&p| p < *start || p > *end).copied().collect();
6666+6767+ range_doc.delete_pages(&pages_to_delete);
6868+6969+ let mut output = Vec::new();
7070+ range_doc
7171+ .save_to(&mut output)
7272+ .map_err(|e| io::Error::other(format!("Failed to save range {}-{}: {}", start, end, e)))?;
7373+7474+ split_pdfs.push(output);
7575+ }
7676+7777+ Ok(split_pdfs)
7878+}