Deleted vendor folder

1 files changed, 0 insertions, 586 deletions

diff --git a/vendor/png/src/text_metadata.rs b/vendor/png/src/text_metadata.rs
deleted file mode 100644
index 42f8df3..0000000
--- a/vendor/png/src/text_metadata.rs
+++ /dev/null
@@ -1,586 +0,0 @@
-//! # Text chunks (tEXt/zTXt/iTXt) structs and functions
-//!
-//! The [PNG spec](https://www.w3.org/TR/2003/REC-PNG-20031110/#11textinfo) optionally allows for
-//! embedded text chunks in the file. They may appear either before or after the image data
-//! chunks. There are three kinds of text chunks.
-//!  -   `tEXt`: This has a `keyword` and `text` field, and is ISO 8859-1 encoded.
-//!  -   `zTXt`: This is semantically the same as `tEXt`, i.e. it has the same fields and
-//!       encoding, but the `text` field is compressed before being written into the PNG file.
-//!  -   `iTXt`: This chunk allows for its `text` field to be any valid UTF-8, and supports
-//!        compression of the text field as well.
-//!
-//!  The `ISO 8859-1` encoding technically doesn't allow any control characters
-//!  to be used, but in practice these values are encountered anyway. This can
-//!  either be the extended `ISO-8859-1` encoding with control characters or the
-//!  `Windows-1252` encoding. This crate assumes the `ISO-8859-1` encoding is
-//!  used.
-//!
-//!  ## Reading text chunks
-//!
-//!  As a PNG is decoded, any text chunk encountered is appended the
-//!  [`Info`](`crate::common::Info`) struct, in the `uncompressed_latin1_text`,
-//!  `compressed_latin1_text`, and the `utf8_text` fields depending on whether the encountered
-//!  chunk is `tEXt`, `zTXt`, or `iTXt`.
-//!
-//!  ```
-//!  use std::fs::File;
-//!  use std::iter::FromIterator;
-//!  use std::path::PathBuf;
-//!
-//!  // Opening a png file that has a zTXt chunk
-//!  let decoder = png::Decoder::new(
-//!      File::open(PathBuf::from_iter([
-//!          "tests",
-//!          "text_chunk_examples",
-//!          "ztxt_example.png",
-//!      ]))
-//!      .unwrap(),
-//!  );
-//!  let mut reader = decoder.read_info().unwrap();
-//!  // If the text chunk is before the image data frames, `reader.info()` already contains the text.
-//!  for text_chunk in &reader.info().compressed_latin1_text {
-//!      println!("{:?}", text_chunk.keyword); // Prints the keyword
-//!      println!("{:#?}", text_chunk); // Prints out the text chunk.
-//!      // To get the uncompressed text, use the `get_text` method.
-//!      println!("{}", text_chunk.get_text().unwrap());
-//!  }
-//!  ```
-//!
-//!  ## Writing text chunks
-//!
-//!  There are two ways to write text chunks: the first is to add the appropriate text structs directly to the encoder header before the header is written to file.
-//!  To add a text chunk at any point in the stream, use the `write_text_chunk` method.
-//!
-//!  ```
-//!  # use png::text_metadata::{ITXtChunk, ZTXtChunk};
-//!  # use std::env;
-//!  # use std::fs::File;
-//!  # use std::io::BufWriter;
-//!  # use std::iter::FromIterator;
-//!  # use std::path::PathBuf;
-//!  # let file = File::create(PathBuf::from_iter(["target", "text_chunk.png"])).unwrap();
-//!  # let ref mut w = BufWriter::new(file);
-//!  let mut encoder = png::Encoder::new(w, 2, 1); // Width is 2 pixels and height is 1.
-//!  encoder.set_color(png::ColorType::Rgba);
-//!  encoder.set_depth(png::BitDepth::Eight);
-//!  // Adding text chunks to the header
-//!  encoder
-//!     .add_text_chunk(
-//!         "Testing tEXt".to_string(),
-//!         "This is a tEXt chunk that will appear before the IDAT chunks.".to_string(),
-//!     )
-//!     .unwrap();
-//!  encoder
-//!      .add_ztxt_chunk(
-//!          "Testing zTXt".to_string(),
-//!          "This is a zTXt chunk that is compressed in the png file.".to_string(),
-//!      )
-//!      .unwrap();
-//!  encoder
-//!      .add_itxt_chunk(
-//!          "Testing iTXt".to_string(),
-//!          "iTXt chunks support all of UTF8. Example: हिंदी.".to_string(),
-//!      )
-//!      .unwrap();
-//!
-//!  let mut writer = encoder.write_header().unwrap();
-//!
-//!  let data = [255, 0, 0, 255, 0, 0, 0, 255]; // An array containing a RGBA sequence. First pixel is red and second pixel is black.
-//!  writer.write_image_data(&data).unwrap(); // Save
-//!
-//!  // We can add a tEXt/zTXt/iTXt at any point before the encoder is dropped from scope. These chunks will be at the end of the png file.
-//!  let tail_ztxt_chunk = ZTXtChunk::new("Comment".to_string(), "A zTXt chunk after the image data.".to_string());
-//!  writer.write_text_chunk(&tail_ztxt_chunk).unwrap();
-//!
-//!  // The fields of the text chunk are public, so they can be mutated before being written to the file.
-//!  let mut tail_itxt_chunk = ITXtChunk::new("Author".to_string(), "सायंतन खान".to_string());
-//!  tail_itxt_chunk.compressed = true;
-//!  tail_itxt_chunk.language_tag = "hi".to_string();
-//!  tail_itxt_chunk.translated_keyword = "लेखक".to_string();
-//!  writer.write_text_chunk(&tail_itxt_chunk).unwrap();
-//!  ```
-
-#![warn(missing_docs)]
-
-use crate::{chunk, encoder, DecodingError, EncodingError};
-use flate2::write::ZlibEncoder;
-use flate2::Compression;
-use miniz_oxide::inflate::{decompress_to_vec_zlib, decompress_to_vec_zlib_with_limit};
-use std::{convert::TryFrom, io::Write};
-
-/// Default decompression limit for compressed text chunks.
-pub const DECOMPRESSION_LIMIT: usize = 2097152; // 2 MiB
-
-/// Text encoding errors that is wrapped by the standard EncodingError type
-#[derive(Debug, Clone, Copy)]
-pub(crate) enum TextEncodingError {
-    /// Unrepresentable characters in string
-    Unrepresentable,
-    /// Keyword longer than 79 bytes or empty
-    InvalidKeywordSize,
-    /// Error encountered while compressing text
-    CompressionError,
-}
-
-/// Text decoding error that is wrapped by the standard DecodingError type
-#[derive(Debug, Clone, Copy)]
-pub(crate) enum TextDecodingError {
-    /// Unrepresentable characters in string
-    Unrepresentable,
-    /// Keyword longer than 79 bytes or empty
-    InvalidKeywordSize,
-    /// Missing null separator
-    MissingNullSeparator,
-    /// Compressed text cannot be uncompressed
-    InflationError,
-    /// Needs more space to decompress
-    OutOfDecompressionSpace,
-    /// Using an unspecified value for the compression method
-    InvalidCompressionMethod,
-    /// Using a byte that is not 0 or 255 as compression flag in iTXt chunk
-    InvalidCompressionFlag,
-    /// Missing the compression flag
-    MissingCompressionFlag,
-}
-
-/// A generalized text chunk trait
-pub trait EncodableTextChunk {
-    /// Encode text chunk as Vec<u8> to a `Write`
-    fn encode<W: Write>(&self, w: &mut W) -> Result<(), EncodingError>;
-}
-
-/// Struct representing a tEXt chunk
-#[derive(Clone, Debug, PartialEq, Eq)]
-pub struct TEXtChunk {
-    /// Keyword field of the tEXt chunk. Needs to be between 1-79 bytes when encoded as Latin-1.
-    pub keyword: String,
-    /// Text field of tEXt chunk. Can be at most 2GB.
-    pub text: String,
-}
-
-fn decode_iso_8859_1(text: &[u8]) -> String {
-    text.iter().map(|&b| b as char).collect()
-}
-
-fn encode_iso_8859_1(text: &str) -> Result<Vec<u8>, TextEncodingError> {
-    encode_iso_8859_1_iter(text).collect()
-}
-
-fn encode_iso_8859_1_into(buf: &mut Vec<u8>, text: &str) -> Result<(), TextEncodingError> {
-    for b in encode_iso_8859_1_iter(text) {
-        buf.push(b?);
-    }
-    Ok(())
-}
-
-fn encode_iso_8859_1_iter(text: &str) -> impl Iterator<Item = Result<u8, TextEncodingError>> + '_ {
-    text.chars()
-        .map(|c| u8::try_from(c as u32).map_err(|_| TextEncodingError::Unrepresentable))
-}
-
-fn decode_ascii(text: &[u8]) -> Result<&str, TextDecodingError> {
-    if text.is_ascii() {
-        // `from_utf8` cannot panic because we're already checked that `text` is ASCII-7.
-        // And this is the only safe way to get ASCII-7 string from `&[u8]`.
-        Ok(std::str::from_utf8(text).expect("unreachable"))
-    } else {
-        Err(TextDecodingError::Unrepresentable)
-    }
-}
-
-impl TEXtChunk {
-    /// Constructs a new TEXtChunk.
-    /// Not sure whether it should take &str or String.
-    pub fn new(keyword: impl Into<String>, text: impl Into<String>) -> Self {
-        Self {
-            keyword: keyword.into(),
-            text: text.into(),
-        }
-    }
-
-    /// Decodes a slice of bytes to a String using Latin-1 decoding.
-    /// The decoder runs in strict mode, and any decoding errors are passed along to the caller.
-    pub(crate) fn decode(
-        keyword_slice: &[u8],
-        text_slice: &[u8],
-    ) -> Result<Self, TextDecodingError> {
-        if keyword_slice.is_empty() || keyword_slice.len() > 79 {
-            return Err(TextDecodingError::InvalidKeywordSize);
-        }
-
-        Ok(Self {
-            keyword: decode_iso_8859_1(keyword_slice),
-            text: decode_iso_8859_1(text_slice),
-        })
-    }
-}
-
-impl EncodableTextChunk for TEXtChunk {
-    /// Encodes TEXtChunk to a Writer. The keyword and text are separated by a byte of zeroes.
-    fn encode<W: Write>(&self, w: &mut W) -> Result<(), EncodingError> {
-        let mut data = encode_iso_8859_1(&self.keyword)?;
-
-        if data.is_empty() || data.len() > 79 {
-            return Err(TextEncodingError::InvalidKeywordSize.into());
-        }
-
-        data.push(0);
-
-        encode_iso_8859_1_into(&mut data, &self.text)?;
-
-        encoder::write_chunk(w, chunk::tEXt, &data)
-    }
-}
-
-/// Struct representing a zTXt chunk
-#[derive(Clone, Debug, PartialEq, Eq)]
-pub struct ZTXtChunk {
-    /// Keyword field of the tEXt chunk. Needs to be between 1-79 bytes when encoded as Latin-1.
-    pub keyword: String,
-    /// Text field of zTXt chunk. It is compressed by default, but can be uncompressed if necessary.
-    text: OptCompressed,
-}
-
-/// Private enum encoding the compressed and uncompressed states of zTXt/iTXt text field.
-#[derive(Clone, Debug, PartialEq, Eq)]
-enum OptCompressed {
-    /// Compressed version of text field. Can be at most 2GB.
-    Compressed(Vec<u8>),
-    /// Uncompressed text field.
-    Uncompressed(String),
-}
-
-impl ZTXtChunk {
-    /// Creates a new ZTXt chunk.
-    pub fn new(keyword: impl Into<String>, text: impl Into<String>) -> Self {
-        Self {
-            keyword: keyword.into(),
-            text: OptCompressed::Uncompressed(text.into()),
-        }
-    }
-
-    pub(crate) fn decode(
-        keyword_slice: &[u8],
-        compression_method: u8,
-        text_slice: &[u8],
-    ) -> Result<Self, TextDecodingError> {
-        if keyword_slice.is_empty() || keyword_slice.len() > 79 {
-            return Err(TextDecodingError::InvalidKeywordSize);
-        }
-
-        if compression_method != 0 {
-            return Err(TextDecodingError::InvalidCompressionMethod);
-        }
-
-        Ok(Self {
-            keyword: decode_iso_8859_1(keyword_slice),
-            text: OptCompressed::Compressed(text_slice.to_vec()),
-        })
-    }
-
-    /// Decompresses the inner text, mutating its own state. Can only handle decompressed text up to `DECOMPRESSION_LIMIT` bytes.
-    pub fn decompress_text(&mut self) -> Result<(), DecodingError> {
-        self.decompress_text_with_limit(DECOMPRESSION_LIMIT)
-    }
-
-    /// Decompresses the inner text, mutating its own state. Can only handle decompressed text up to `limit` bytes.
-    pub fn decompress_text_with_limit(&mut self, limit: usize) -> Result<(), DecodingError> {
-        match &self.text {
-            OptCompressed::Compressed(v) => {
-                let uncompressed_raw = match decompress_to_vec_zlib_with_limit(&v[..], limit) {
-                    Ok(s) => s,
-                    Err(err) if err.status == miniz_oxide::inflate::TINFLStatus::HasMoreOutput => {
-                        return Err(DecodingError::from(
-                            TextDecodingError::OutOfDecompressionSpace,
-                        ));
-                    }
-                    Err(_) => {
-                        return Err(DecodingError::from(TextDecodingError::InflationError));
-                    }
-                };
-                self.text = OptCompressed::Uncompressed(decode_iso_8859_1(&uncompressed_raw));
-            }
-            OptCompressed::Uncompressed(_) => {}
-        };
-        Ok(())
-    }
-
-    /// Decompresses the inner text, and returns it as a `String`.
-    /// If decompression uses more the 2MiB, first call decompress with limit, and then this method.
-    pub fn get_text(&self) -> Result<String, DecodingError> {
-        match &self.text {
-            OptCompressed::Compressed(v) => {
-                let uncompressed_raw = decompress_to_vec_zlib(&v[..])
-                    .map_err(|_| DecodingError::from(TextDecodingError::InflationError))?;
-                Ok(decode_iso_8859_1(&uncompressed_raw))
-            }
-            OptCompressed::Uncompressed(s) => Ok(s.clone()),
-        }
-    }
-
-    /// Compresses the inner text, mutating its own state.
-    pub fn compress_text(&mut self) -> Result<(), EncodingError> {
-        match &self.text {
-            OptCompressed::Uncompressed(s) => {
-                let uncompressed_raw = encode_iso_8859_1(s)?;
-                let mut encoder = ZlibEncoder::new(Vec::new(), Compression::fast());
-                encoder
-                    .write_all(&uncompressed_raw)
-                    .map_err(|_| EncodingError::from(TextEncodingError::CompressionError))?;
-                self.text = OptCompressed::Compressed(
-                    encoder
-                        .finish()
-                        .map_err(|_| EncodingError::from(TextEncodingError::CompressionError))?,
-                );
-            }
-            OptCompressed::Compressed(_) => {}
-        }
-
-        Ok(())
-    }
-}
-
-impl EncodableTextChunk for ZTXtChunk {
-    fn encode<W: Write>(&self, w: &mut W) -> Result<(), EncodingError> {
-        let mut data = encode_iso_8859_1(&self.keyword)?;
-
-        if data.is_empty() || data.len() > 79 {
-            return Err(TextEncodingError::InvalidKeywordSize.into());
-        }
-
-        // Null separator
-        data.push(0);
-
-        // Compression method: the only valid value is 0, as of 2021.
-        data.push(0);
-
-        match &self.text {
-            OptCompressed::Compressed(v) => {
-                data.extend_from_slice(&v[..]);
-            }
-            OptCompressed::Uncompressed(s) => {
-                // This code may have a bug. Check for correctness.
-                let uncompressed_raw = encode_iso_8859_1(s)?;
-                let mut encoder = ZlibEncoder::new(data, Compression::fast());
-                encoder
-                    .write_all(&uncompressed_raw)
-                    .map_err(|_| EncodingError::from(TextEncodingError::CompressionError))?;
-                data = encoder
-                    .finish()
-                    .map_err(|_| EncodingError::from(TextEncodingError::CompressionError))?;
-            }
-        };
-
-        encoder::write_chunk(w, chunk::zTXt, &data)
-    }
-}
-
-/// Struct encoding an iTXt chunk
-#[derive(Clone, Debug, PartialEq, Eq)]
-pub struct ITXtChunk {
-    /// The keyword field. This needs to be between 1-79 bytes when encoded as Latin-1.
-    pub keyword: String,
-    /// Indicates whether the text will be (or was) compressed in the PNG.
-    pub compressed: bool,
-    /// A hyphen separated list of languages that the keyword is translated to. This is ASCII-7 encoded.
-    pub language_tag: String,
-    /// Translated keyword. This is UTF-8 encoded.
-    pub translated_keyword: String,
-    /// Text field of iTXt chunk. It is compressed by default, but can be uncompressed if necessary.
-    text: OptCompressed,
-}
-
-impl ITXtChunk {
-    /// Constructs a new iTXt chunk. Leaves all but keyword and text to default values.
-    pub fn new(keyword: impl Into<String>, text: impl Into<String>) -> Self {
-        Self {
-            keyword: keyword.into(),
-            compressed: false,
-            language_tag: "".to_string(),
-            translated_keyword: "".to_string(),
-            text: OptCompressed::Uncompressed(text.into()),
-        }
-    }
-
-    pub(crate) fn decode(
-        keyword_slice: &[u8],
-        compression_flag: u8,
-        compression_method: u8,
-        language_tag_slice: &[u8],
-        translated_keyword_slice: &[u8],
-        text_slice: &[u8],
-    ) -> Result<Self, TextDecodingError> {
-        if keyword_slice.is_empty() || keyword_slice.len() > 79 {
-            return Err(TextDecodingError::InvalidKeywordSize);
-        }
-        let keyword = decode_iso_8859_1(keyword_slice);
-
-        let compressed = match compression_flag {
-            0 => false,
-            1 => true,
-            _ => return Err(TextDecodingError::InvalidCompressionFlag),
-        };
-
-        if compressed && compression_method != 0 {
-            return Err(TextDecodingError::InvalidCompressionMethod);
-        }
-
-        let language_tag = decode_ascii(language_tag_slice)?.to_owned();
-
-        let translated_keyword = std::str::from_utf8(translated_keyword_slice)
-            .map_err(|_| TextDecodingError::Unrepresentable)?
-            .to_string();
-        let text = if compressed {
-            OptCompressed::Compressed(text_slice.to_vec())
-        } else {
-            OptCompressed::Uncompressed(
-                String::from_utf8(text_slice.to_vec())
-                    .map_err(|_| TextDecodingError::Unrepresentable)?,
-            )
-        };
-
-        Ok(Self {
-            keyword,
-            compressed,
-            language_tag,
-            translated_keyword,
-            text,
-        })
-    }
-
-    /// Decompresses the inner text, mutating its own state. Can only handle decompressed text up to `DECOMPRESSION_LIMIT` bytes.
-    pub fn decompress_text(&mut self) -> Result<(), DecodingError> {
-        self.decompress_text_with_limit(DECOMPRESSION_LIMIT)
-    }
-
-    /// Decompresses the inner text, mutating its own state. Can only handle decompressed text up to `limit` bytes.
-    pub fn decompress_text_with_limit(&mut self, limit: usize) -> Result<(), DecodingError> {
-        match &self.text {
-            OptCompressed::Compressed(v) => {
-                let uncompressed_raw = match decompress_to_vec_zlib_with_limit(&v[..], limit) {
-                    Ok(s) => s,
-                    Err(err) if err.status == miniz_oxide::inflate::TINFLStatus::HasMoreOutput => {
-                        return Err(DecodingError::from(
-                            TextDecodingError::OutOfDecompressionSpace,
-                        ));
-                    }
-                    Err(_) => {
-                        return Err(DecodingError::from(TextDecodingError::InflationError));
-                    }
-                };
-                self.text = OptCompressed::Uncompressed(
-                    String::from_utf8(uncompressed_raw)
-                        .map_err(|_| TextDecodingError::Unrepresentable)?,
-                );
-            }
-            OptCompressed::Uncompressed(_) => {}
-        };
-        Ok(())
-    }
-
-    /// Decompresses the inner text, and returns it as a `String`.
-    /// If decompression takes more than 2 MiB, try `decompress_text_with_limit` followed by this method.
-    pub fn get_text(&self) -> Result<String, DecodingError> {
-        match &self.text {
-            OptCompressed::Compressed(v) => {
-                let uncompressed_raw = decompress_to_vec_zlib(&v[..])
-                    .map_err(|_| DecodingError::from(TextDecodingError::InflationError))?;
-                String::from_utf8(uncompressed_raw)
-                    .map_err(|_| TextDecodingError::Unrepresentable.into())
-            }
-            OptCompressed::Uncompressed(s) => Ok(s.clone()),
-        }
-    }
-
-    /// Compresses the inner text, mutating its own state.
-    pub fn compress_text(&mut self) -> Result<(), EncodingError> {
-        match &self.text {
-            OptCompressed::Uncompressed(s) => {
-                let uncompressed_raw = s.as_bytes();
-                let mut encoder = ZlibEncoder::new(Vec::new(), Compression::fast());
-                encoder
-                    .write_all(uncompressed_raw)
-                    .map_err(|_| EncodingError::from(TextEncodingError::CompressionError))?;
-                self.text = OptCompressed::Compressed(
-                    encoder
-                        .finish()
-                        .map_err(|_| EncodingError::from(TextEncodingError::CompressionError))?,
-                );
-            }
-            OptCompressed::Compressed(_) => {}
-        }
-
-        Ok(())
-    }
-}
-
-impl EncodableTextChunk for ITXtChunk {
-    fn encode<W: Write>(&self, w: &mut W) -> Result<(), EncodingError> {
-        // Keyword
-        let mut data = encode_iso_8859_1(&self.keyword)?;
-
-        if data.is_empty() || data.len() > 79 {
-            return Err(TextEncodingError::InvalidKeywordSize.into());
-        }
-
-        // Null separator
-        data.push(0);
-
-        // Compression flag
-        if self.compressed {
-            data.push(1);
-        } else {
-            data.push(0);
-        }
-
-        // Compression method
-        data.push(0);
-
-        // Language tag
-        if !self.language_tag.is_ascii() {
-            return Err(EncodingError::from(TextEncodingError::Unrepresentable));
-        }
-        data.extend(self.language_tag.as_bytes());
-
-        // Null separator
-        data.push(0);
-
-        // Translated keyword
-        data.extend_from_slice(self.translated_keyword.as_bytes());
-
-        // Null separator
-        data.push(0);
-
-        // Text
-        if self.compressed {
-            match &self.text {
-                OptCompressed::Compressed(v) => {
-                    data.extend_from_slice(&v[..]);
-                }
-                OptCompressed::Uncompressed(s) => {
-                    let uncompressed_raw = s.as_bytes();
-                    let mut encoder = ZlibEncoder::new(data, Compression::fast());
-                    encoder
-                        .write_all(uncompressed_raw)
-                        .map_err(|_| EncodingError::from(TextEncodingError::CompressionError))?;
-                    data = encoder
-                        .finish()
-                        .map_err(|_| EncodingError::from(TextEncodingError::CompressionError))?;
-                }
-            }
-        } else {
-            match &self.text {
-                OptCompressed::Compressed(v) => {
-                    let uncompressed_raw = decompress_to_vec_zlib(&v[..])
-                        .map_err(|_| EncodingError::from(TextEncodingError::CompressionError))?;
-                    data.extend_from_slice(&uncompressed_raw[..]);
-                }
-                OptCompressed::Uncompressed(s) => {
-                    data.extend_from_slice(s.as_bytes());
-                }
-            }
-        }
-
-        encoder::write_chunk(w, chunk::iTXt, &data)
-    }
-}