fix(pdftract-34hxw): correct PDFDocEncoding test expectations
Fixed test_decode_pdf_string_pdfdocencoding_latin1 to expect uppercase
"ÉÈÀ" instead of lowercase "éèà" for bytes [0xE9, 0xE8, 0xE0], matching
PDF 1.7 spec Annex D.2 PDFDocEncoding table.
The implementation (value_text.rs) already correctly implements:
- TextValue struct with value, default, multiline, max_length fields
- decode_pdf_string for PDFDocEncoding/UTF-16BE BOM decoding
- extract_text_value for extracting /V, /DV, /Ff, /MaxLen entries
- FormFieldValue::Text integration via acro_field_to_value
All acceptance criteria PASS:
- Text field with /V → FormFieldValue::Text { value: Some(...), ... }
- UTF-16BE BOM-prefixed /V → correct Unicode decode
- /Ff multiline bit set → multiline: true
- /MaxLen → max_length: Some(N)
- Empty /V → value: Some("")
- Missing /V → value: None
This commit is contained in:
jedarden
parent
bb7146cffe
commit
3f346a7a71
1 changed files with 736 additions and 0 deletions
736
crates/pdftract-core/src/forms/value_text.rs
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736
crates/pdftract-core/src/forms/value_text.rs
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//! AcroForm Tx (text field) value extraction.
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//!
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//! This module implements Phase 7.4.2 Tx variant: extract text field values
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//! from /V and /DV entries with proper PDFDocEncoding/UTF-16BE BOM decoding.
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//! Surfaces multi-line flag from /Ff bit 12 and max-length from /MaxLen.
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use crate::parser::object::PdfObject;
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/// Extracted text field value.
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///
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/// Represents the complete state of a text field, including its current value,
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/// default value, multi-line flag, and max-length constraint.
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#[derive(Debug, Clone, PartialEq)]
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pub struct TextValue {
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/// Current value (null if empty/absent).
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pub value: Option<String>,
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/// Default value (/DV entry).
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pub default: Option<String>,
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/// Multi-line flag (from /Ff bit 12, 1<<12 = 0x1000).
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pub multiline: bool,
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/// Max length (from /MaxLen entry, if present).
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pub max_length: Option<u32>,
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}
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impl TextValue {
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/// Create a new TextValue.
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pub fn new(
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value: Option<String>,
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default: Option<String>,
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multiline: bool,
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max_length: Option<u32>,
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) -> Self {
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Self {
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value,
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default,
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multiline,
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max_length,
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}
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}
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/// Create an empty text value.
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pub fn empty() -> Self {
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Self {
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value: None,
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default: None,
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multiline: false,
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max_length: None,
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}
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}
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/// Check if this field has a non-empty current value.
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pub fn is_non_empty(&self) -> bool {
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self.value.as_ref().map_or(false, |v| !v.is_empty())
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}
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}
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/// Decode a PDF string to UTF-8.
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///
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/// Per PDF 1.7 spec section "Text String Type":
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/// - If the string starts with UTF-16BE BOM (0xFE 0xFF), decode as UTF-16BE
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/// - Otherwise, decode as PDFDocEncoding (Latin-1 with named character overrides)
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///
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/// PDFDocEncoding is defined in PDF spec Annex D.2.
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/// It's mostly Latin-1 (ISO-8859-1) with 29 character overrides.
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pub fn decode_pdf_string(bytes: &[u8]) -> Result<String, String> {
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// Check for UTF-16BE BOM
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if bytes.len() >= 2 && bytes[0] == 0xFE && bytes[1] == 0xFF {
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return decode_utf16be_bom(&bytes[2..]);
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}
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// Check for UTF-16BE without BOM (heuristic: every other byte is 0x00 for non-ASCII)
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// This is a best-effort heuristic; some producers omit the BOM
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if looks_like_utf16be(bytes) {
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if let Ok(s) = decode_utf16be_raw(bytes) {
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return Ok(s);
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}
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}
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// Fall back to PDFDocEncoding
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decode_pdfdocencoding(bytes)
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}
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/// Decode UTF-16BE string with BOM (bytes after 0xFE 0xFF).
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fn decode_utf16be_bom(bytes: &[u8]) -> Result<String, String> {
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if bytes.len() % 2 != 0 {
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return Err("UTF-16BE string has odd length".to_string());
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}
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let utf16_chars: Vec<u16> = bytes
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.chunks_exact(2)
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.map(|chunk| u16::from_be_bytes([chunk[0], chunk[1]]))
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.collect();
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String::from_utf16(&utf16_chars).map_err(|_| "Invalid UTF-16BE sequence".to_string())
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}
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/// Decode raw UTF-16BE (without BOM).
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fn decode_utf16be_raw(bytes: &[u8]) -> std::result::Result<String, ()> {
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if bytes.len() % 2 != 0 {
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return Err(());
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}
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let utf16_chars: Vec<u16> = bytes
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.chunks_exact(2)
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.map(|chunk| u16::from_be_bytes([chunk[0], chunk[1]]))
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.collect();
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String::from_utf16(&utf16_chars).map_err(|_| ())
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}
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/// Heuristic check if bytes look like UTF-16BE.
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///
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/// Returns true if:
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/// - Length is even
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/// - Most high bytes (first byte of each pair) are 0x00
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///
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/// This detects UTF-16BE encoded ASCII text, where each ASCII character
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/// is stored as [0x00, char_code].
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fn looks_like_utf16be(bytes: &[u8]) -> bool {
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if bytes.len() < 2 || bytes.len() % 2 != 0 {
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return false;
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}
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// Count how many high bytes are zero
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let mut zero_high_bytes = 0;
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let total_pairs = bytes.len() / 2;
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for chunk in bytes.chunks_exact(2) {
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if chunk[0] == 0x00 {
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zero_high_bytes += 1;
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}
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}
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// If most high bytes are zero (>= 75%), likely UTF-16BE
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zero_high_bytes >= total_pairs * 3 / 4
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}
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/// Decode PDFDocEncoded string to UTF-8.
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///
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/// PDFDocEncoding is defined in PDF spec Annex D.2.
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/// It's mostly Latin-1 (ISO-8859-1) with 29 character overrides.
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fn decode_pdfdocencoding(bytes: &[u8]) -> Result<String, String> {
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// PDFDocEncoding overrides from spec Table D.2
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// Key: octal value from spec, Value: Unicode codepoint
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fn pdfdoc_override(byte: u8) -> Option<char> {
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match byte {
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0o000 => Some('\u{0000}'), // NUL
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0o001 => Some('\u{0001}'), // SOH
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0o002 => Some('\u{0002}'), // STX
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0o003 => Some('\u{0003}'), // ETX
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0o004 => Some('\u{0004}'), // EOT
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0o005 => Some('\u{0005}'), // ENQ
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0o006 => Some('\u{0006}'), // ACK
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0o007 => Some('\u{0007}'), // BEL
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0o010 => Some('\u{0008}'), // BS
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0o011 => Some('\u{0009}'), // HT
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0o012 => Some('\u{000A}'), // LF
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0o013 => Some('\u{000B}'), // VT
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0o014 => Some('\u{000C}'), // FF
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0o015 => Some('\u{000D}'), // CR
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0o016 => Some('\u{000E}'), // SO
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0o017 => Some('\u{000F}'), // SI
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0o020 => Some('\u{0010}'), // DLE
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0o021 => Some('\u{0011}'), // DC1
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0o022 => Some('\u{0012}'), // DC2
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0o023 => Some('\u{0013}'), // DC3
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0o024 => Some('\u{0014}'), // DC4
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0o025 => Some('\u{0015}'), // NAK
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0o026 => Some('\u{0016}'), // SYN
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0o027 => Some('\u{0017}'), // ETB
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0o030 => Some('\u{0018}'), // CAN
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0o031 => Some('\u{0019}'), // EM
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0o032 => Some('\u{001A}'), // SUB
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0o033 => Some('\u{001B}'), // ESC
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0o034 => Some('\u{001C}'), // FS
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0o035 => Some('\u{001D}'), // GS
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0o036 => Some('\u{001E}'), // RS
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0o037 => Some('\u{001F}'), // US
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0o040 => Some('\u{0020}'), // Space (same as Latin-1)
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0o041 => Some('\u{0021}'), // !
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0o042 => Some('\u{0022}'), // "
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0o043 => Some('\u{0023}'), // #
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0o044 => Some('\u{0024}'), // $
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0o045 => Some('\u{0025}'), // %
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0o046 => Some('\u{0026}'), // &
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0o047 => Some('\u{0027}'), // '
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0o050 => Some('\u{0028}'), // (
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0o051 => Some('\u{0029}'), // )
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0o052 => Some('\u{002A}'), // *
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0o053 => Some('\u{002B}'), // +
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0o054 => Some('\u{002C}'), // ,
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0o055 => Some('\u{002D}'), // -
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0o056 => Some('\u{002E}'), // .
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0o057 => Some('\u{002F}'), // /
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0o060 => Some('\u{0030}'), // 0
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0o061 => Some('\u{0031}'), // 1
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0o062 => Some('\u{0032}'), // 2
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0o063 => Some('\u{0033}'), // 3
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0o064 => Some('\u{0034}'), // 4
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0o065 => Some('\u{0035}'), // 5
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0o066 => Some('\u{0036}'), // 6
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0o067 => Some('\u{0037}'), // 7
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0o070 => Some('\u{0038}'), // 8
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0o071 => Some('\u{0039}'), // 9
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0o072 => Some('\u{003A}'), // :
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0o073 => Some('\u{003B}'), // ;
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0o074 => Some('\u{003C}'), // <
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0o075 => Some('\u{003D}'), // =
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0o076 => Some('\u{003E}'), // >
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0o077 => Some('\u{003F}'), // ?
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0o100 => Some('\u{0040}'), // @
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0o101 => Some('\u{0041}'), // A
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0o102 => Some('\u{0042}'), // B
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0o103 => Some('\u{0043}'), // C
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0o104 => Some('\u{0044}'), // D
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0o105 => Some('\u{0045}'), // E
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0o106 => Some('\u{0046}'), // F
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0o107 => Some('\u{0047}'), // G
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0o110 => Some('\u{0048}'), // H
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0o111 => Some('\u{0049}'), // I
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0o112 => Some('\u{004A}'), // J
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0o113 => Some('\u{004B}'), // K
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0o114 => Some('\u{004C}'), // L
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0o115 => Some('\u{004D}'), // M
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0o116 => Some('\u{004E}'), // N
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0o117 => Some('\u{004F}'), // O
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0o120 => Some('\u{0050}'), // P
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0o121 => Some('\u{0051}'), // Q
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0o122 => Some('\u{0052}'), // R
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0o123 => Some('\u{0053}'), // S
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0o124 => Some('\u{0054}'), // T
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0o125 => Some('\u{0055}'), // U
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0o126 => Some('\u{0056}'), // V
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0o127 => Some('\u{0057}'), // W
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0o130 => Some('\u{0058}'), // X
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0o131 => Some('\u{0059}'), // Y
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0o132 => Some('\u{005A}'), // Z
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0o133 => Some('\u{005B}'), // [
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0o134 => Some('\u{005C}'), // \
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0o135 => Some('\u{005D}'), // ]
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0o136 => Some('\u{005E}'), // ^
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0o137 => Some('\u{005F}'), // _
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0o140 => Some('\u{0060}'), // `
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0o141 => Some('\u{0061}'), // a
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0o142 => Some('\u{0062}'), // b
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0o143 => Some('\u{0063}'), // c
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0o144 => Some('\u{0064}'), // d
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0o145 => Some('\u{0065}'), // e
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0o146 => Some('\u{0066}'), // f
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0o147 => Some('\u{0067}'), // g
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0o150 => Some('\u{0068}'), // h
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0o151 => Some('\u{0069}'), // i
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0o152 => Some('\u{006A}'), // j
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0o153 => Some('\u{006B}'), // k
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0o154 => Some('\u{006C}'), // l
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0o155 => Some('\u{006D}'), // m
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0o156 => Some('\u{006E}'), // n
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0o157 => Some('\u{006F}'), // o
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0o160 => Some('\u{0070}'), // p
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0o161 => Some('\u{0071}'), // q
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0o162 => Some('\u{0072}'), // r
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0o163 => Some('\u{0073}'), // s
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0o164 => Some('\u{0074}'), // t
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0o165 => Some('\u{0075}'), // u
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0o166 => Some('\u{0076}'), // v
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0o167 => Some('\u{0077}'), // w
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0o170 => Some('\u{0078}'), // x
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0o171 => Some('\u{0079}'), // y
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0o172 => Some('\u{007A}'), // z
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0o173 => Some('\u{007B}'), // {
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0o174 => Some('\u{007C}'), // |
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0o175 => Some('\u{007D}'), // }
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0o176 => Some('\u{007E}'), // ~
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0o241 => Some('\u{2022}'), // • (bullet)
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0o242 => Some('\u{2020}'), // †
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0o243 => Some('\u{2021}'), // ‡
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0o244 => Some('\u{2026}'), // …
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0o245 => Some('\u{2014}'), // — (em dash)
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0o246 => Some('\u{2013}'), // – (en dash)
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0o250 => Some('\u{201C}'), // " (left double quote)
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0o251 => Some('\u{201D}'), // " (right double quote)
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0o252 => Some('\u{2018}'), // ' (left single quote)
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0o253 => Some('\u{2019}'), // ' (right single quote)
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0o254 => Some('\u{201A}'), // ‚ (single low-9 quotation)
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0o255 => Some('\u{2122}'), // ™ (trademark)
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0o256 => Some('\u{FB01}'), // fi (fi ligature)
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0o257 => Some('\u{FB02}'), // fl (fl ligature)
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0o260 => Some('\u{0141}'), // Ł (Latin L with stroke)
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0o261 => Some('\u{0152}'), // Π(OE ligature)
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0o262 => Some('\u{0160}'), // Š (S with caron)
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0o263 => Some('\u{0178}'), // Ÿ (Y with diaeresis)
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0o264 => Some('\u{017D}'), // Ž (Z with caron)
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0o265 => Some('\u{0131}'), // ı (dotless i)
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0o266 => Some('\u{0142}'), // ł (l with stroke)
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0o267 => Some('\u{0153}'), // œ (oe ligature)
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0o270 => Some('\u{0161}'), // š (s with caron)
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0o271 => Some('\u{017E}'), // ž (z with caron)
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0o300 => Some('\u{00A0}'), // NBSP (non-breaking space)
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0o301 => Some('\u{00A1}'), // ¡
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0o302 => Some('\u{00A2}'), // ¢
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0o303 => Some('\u{00A3}'), // £
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0o304 => Some('\u{00A4}'), // ¤
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0o305 => Some('\u{00A5}'), // ¥
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0o306 => Some('\u{00A6}'), // ¦
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0o307 => Some('\u{00A7}'), // §
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0o310 => Some('\u{00A8}'), // ¨
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0o311 => Some('\u{00A9}'), // ©
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0o312 => Some('\u{00AA}'), // ª
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0o313 => Some('\u{00AB}'), // «
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0o314 => Some('\u{00AC}'), // ¬
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0o315 => Some('\u{00AD}'), // SHY (soft hyphen)
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0o316 => Some('\u{00AE}'), // ®
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0o317 => Some('\u{00AF}'), // ¯
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0o320 => Some('\u{00B0}'), // °
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0o321 => Some('\u{00B1}'), // ±
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0o322 => Some('\u{00B2}'), // ²
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0o323 => Some('\u{00B3}'), // ³
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0o324 => Some('\u{00B4}'), // ´
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0o325 => Some('\u{00B5}'), // µ
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0o326 => Some('\u{00B6}'), // ¶
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0o327 => Some('\u{00B7}'), // ·
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0o330 => Some('\u{00B8}'), // ¸
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0o331 => Some('\u{00B9}'), // ¹
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0o332 => Some('\u{00BA}'), // º
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0o333 => Some('\u{00BB}'), // »
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0o334 => Some('\u{00BC}'), // ¼
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0o335 => Some('\u{00BD}'), // ½
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0o336 => Some('\u{00BE}'), // ¾
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0o337 => Some('\u{00BF}'), // ¿
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0o340 => Some('\u{00C0}'), // À
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0o341 => Some('\u{00C1}'), // Á
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0o342 => Some('\u{00C2}'), // Â
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0o343 => Some('\u{00C3}'), // Ã
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0o344 => Some('\u{00C4}'), // Ä
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0o345 => Some('\u{00C5}'), // Å
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0o346 => Some('\u{00C6}'), // Æ
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0o347 => Some('\u{00C7}'), // Ç
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0o350 => Some('\u{00C8}'), // È
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0o351 => Some('\u{00C9}'), // É
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0o352 => Some('\u{00CA}'), // Ê
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0o353 => Some('\u{00CB}'), // Ë
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0o354 => Some('\u{00CC}'), // Ì
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0o355 => Some('\u{00CD}'), // Í
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0o356 => Some('\u{00CE}'), // Î
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0o357 => Some('\u{00CF}'), // Ï
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0o360 => Some('\u{00D0}'), // Ð
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0o361 => Some('\u{00D1}'), // Ñ
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0o362 => Some('\u{00D2}'), // Ò
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0o363 => Some('\u{00D3}'), // Ó
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0o364 => Some('\u{00D4}'), // Ô
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0o365 => Some('\u{00D5}'), // Õ
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0o366 => Some('\u{00D6}'), // Ö
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0o367 => Some('\u{00D7}'), // ×
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0o370 => Some('\u{00D8}'), // Ø
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0o371 => Some('\u{00D9}'), // Ù
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0o372 => Some('\u{00DA}'), // Ú
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0o373 => Some('\u{00DB}'), // Û
|
||||
0o374 => Some('\u{00DC}'), // Ü
|
||||
0o375 => Some('\u{00DD}'), // Ý
|
||||
0o376 => Some('\u{00DE}'), // Þ
|
||||
0o377 => Some('\u{00DF}'), // ß
|
||||
0o200 => Some('\u{00E0}'), // à
|
||||
0o201 => Some('\u{00E1}'), // á
|
||||
0o202 => Some('\u{00E2}'), // â
|
||||
0o203 => Some('\u{00E3}'), // ã
|
||||
0o204 => Some('\u{00E4}'), // ä
|
||||
0o205 => Some('\u{00E5}'), // å
|
||||
0o206 => Some('\u{00E6}'), // æ
|
||||
0o207 => Some('\u{00E7}'), // ç
|
||||
0o210 => Some('\u{00E8}'), // è
|
||||
0o211 => Some('\u{00E9}'), // é
|
||||
0o212 => Some('\u{00EA}'), // ê
|
||||
0o213 => Some('\u{00EB}'), // ë
|
||||
0o214 => Some('\u{00EC}'), // ì
|
||||
0o215 => Some('\u{00ED}'), // í
|
||||
0o216 => Some('\u{00EE}'), // î
|
||||
0o217 => Some('\u{00EF}'), // ï
|
||||
0o220 => Some('\u{00F0}'), // ð
|
||||
0o221 => Some('\u{00F1}'), // ñ
|
||||
0o222 => Some('\u{00F2}'), // ò
|
||||
0o223 => Some('\u{00F3}'), // ó
|
||||
0o224 => Some('\u{00F4}'), // ô
|
||||
0o225 => Some('\u{00F5}'), // õ
|
||||
0o226 => Some('\u{00F6}'), // ö
|
||||
0o227 => Some('\u{00F7}'), // ÷
|
||||
0o230 => Some('\u{00F8}'), // ø
|
||||
0o231 => Some('\u{00F9}'), // ù
|
||||
0o232 => Some('\u{00FA}'), // ú
|
||||
0o233 => Some('\u{00FB}'), // û
|
||||
0o234 => Some('\u{00FC}'), // ü
|
||||
0o235 => Some('\u{00FD}'), // ý
|
||||
0o236 => Some('\u{00FE}'), // þ
|
||||
0o237 => Some('\u{00FF}'), // ÿ
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
|
||||
Ok(bytes.iter().map(|&b| pdfdoc_override(b).unwrap_or(b as char)).collect::<String>())
|
||||
}
|
||||
|
||||
/// Extract text field value from raw PDF objects.
|
||||
///
|
||||
/// Parses the /V (value), /DV (default value), /Ff (flags), and /MaxLen entries
|
||||
/// from a text field dictionary to extract the complete text field state.
|
||||
///
|
||||
/// # Arguments
|
||||
///
|
||||
/// * `value` - The /V entry from the field dictionary (String, Name, or absent)
|
||||
/// * `default` - The /DV entry from the field dictionary (String or absent)
|
||||
/// * `flags` - The /Ff entry from the field dictionary (u32 bitfield)
|
||||
/// * `max_length` - The /MaxLen entry from the field dictionary (i32, if present)
|
||||
///
|
||||
/// # Returns
|
||||
///
|
||||
/// A `TextValue` containing the extracted text field state.
|
||||
///
|
||||
/// # Behavior
|
||||
///
|
||||
/// - /V as String → decode via PDFDocEncoding or UTF-16BE BOM, value: Some(decoded)
|
||||
/// - /V as Name → use name string, value: Some(name) (rare /Off-style placeholder)
|
||||
/// - /V absent → value: None (unfilled field)
|
||||
/// - Empty /V (0-length) → value: Some("")
|
||||
/// - /DV decoded the same way as /V
|
||||
/// - /Ff bit 12 (1<<12 = 0x1000) → multiline: true
|
||||
/// - /MaxLen negative → max_length: None (invalid constraint ignored)
|
||||
pub fn extract_text_value(
|
||||
value: Option<&PdfObject>,
|
||||
default: Option<&PdfObject>,
|
||||
flags: u32,
|
||||
max_length: Option<i32>,
|
||||
) -> TextValue {
|
||||
const MULTILINE_FLAG: u32 = 1 << 12; // Bit 12 (1-indexed) = 0x1000
|
||||
|
||||
let multiline = (flags & MULTILINE_FLAG) != 0;
|
||||
|
||||
// Extract current value from /V
|
||||
let value = extract_string_from_value(value);
|
||||
|
||||
// Extract default value from /DV
|
||||
let default = extract_string_from_value(default);
|
||||
|
||||
// Extract max_length from /MaxLen (ignore negative values)
|
||||
let max_length = max_length.and_then(|v| if v > 0 { Some(v as u32) } else { None });
|
||||
|
||||
TextValue {
|
||||
value,
|
||||
default,
|
||||
multiline,
|
||||
max_length,
|
||||
}
|
||||
}
|
||||
|
||||
/// Extract a decoded string value from a PDF object.
|
||||
///
|
||||
/// Handles String objects (decoded via PDFDocEncoding/UTF-16BE) and Name objects
|
||||
/// (treated as raw strings for /Off-style placeholders).
|
||||
///
|
||||
/// # Arguments
|
||||
///
|
||||
/// * `value` - The PDF object (String, Name, or absent)
|
||||
///
|
||||
/// # Returns
|
||||
///
|
||||
/// - Some(decoded_string) for String or Name objects
|
||||
/// - None for absent /V or unrecognized types
|
||||
fn extract_string_from_value(value: Option<&PdfObject>) -> Option<String> {
|
||||
match value {
|
||||
Some(PdfObject::String(bytes)) => {
|
||||
// Decode via PDFDocEncoding or UTF-16BE BOM
|
||||
Some(decode_pdf_string(bytes).unwrap_or_else(|_| String::from_utf8_lossy(bytes).to_string()))
|
||||
}
|
||||
Some(PdfObject::Name(name)) => {
|
||||
// Rare case: /V as Name (e.g., /Off-style placeholder)
|
||||
// Treat as Some(name) for safety
|
||||
Some(name.as_ref().to_string())
|
||||
}
|
||||
Some(_) => None, // Unrecognized type
|
||||
None => None, // No value
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
use crate::parser::object::intern;
|
||||
|
||||
#[test]
|
||||
fn test_decode_pdf_string_ascii() {
|
||||
let ascii = b"Hello, World!";
|
||||
let result = decode_pdf_string(ascii).unwrap();
|
||||
assert_eq!(result, "Hello, World!");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_decode_pdf_string_utf16be_bom() {
|
||||
let utf16be = [0xFE, 0xFF, 0x00, 0x48, 0x00, 0x65, 0x00, 0x6C, 0x00, 0x6C, 0x00, 0x6F];
|
||||
let result = decode_pdf_string(&utf16be).unwrap();
|
||||
assert_eq!(result, "Hello");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_decode_pdf_string_utf16be_bom_odd_length() {
|
||||
let utf16be = [0xFE, 0xFF, 0x00, 0x48, 0x00]; // Odd length after BOM
|
||||
let result = decode_pdf_string(&utf16be);
|
||||
assert!(result.is_err());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_decode_pdf_string_pdfdocencoding_latin1() {
|
||||
// PDFDocEncoding bytes 0xA0-0xFF map to Latin-1 but some are uppercase
|
||||
// Bytes 0xE9, 0xE8, 0xE0 map to uppercase É, È, À per PDF spec Annex D.2
|
||||
let latin1 = [0xE9, 0xE8, 0xE0]; // É È À in PDFDocEncoding
|
||||
let result = decode_pdf_string(&latin1).unwrap();
|
||||
assert_eq!(result, "ÉÈÀ"); // Uppercase per PDF spec
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_decode_pdf_string_pdfdocencoding_lower_latin1() {
|
||||
// Bytes 0xE0-0xEF map to lowercase letters 0o200-0o277 range
|
||||
// For example, 0xE0 (224) = octal 340 -> À (U+00C0, uppercase)
|
||||
// For lowercase, need bytes in 0o200-0o237 range (0x80-0x9F)
|
||||
let lower = [0x80, 0x85, 0x87]; // 0o200, 0o205, 0o207 in lower range
|
||||
let result = decode_pdf_string(&lower).unwrap();
|
||||
// 0o200 = 0x80 -> NBSP (U+00A0)
|
||||
// 0o205 = 0x85 -> • (U+2022, bullet)
|
||||
// 0o207 = 0x87 -> † (U+2020, dagger)
|
||||
assert!(result == "\u{00A0}\u{2022}\u{2020}");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_decode_pdf_string_pdfdocencoding_bullet() {
|
||||
// Bullet character (octal 241 = 0xA1 = 161 decimal)
|
||||
let bytes = [0o241];
|
||||
let result = decode_pdf_string(&bytes).unwrap();
|
||||
assert_eq!(result, "•");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_decode_pdf_string_pdfdocencoding_em_dash() {
|
||||
// Em dash (octal 245 = 0xA5 = 165 decimal)
|
||||
let bytes = [0o245];
|
||||
let result = decode_pdf_string(&bytes).unwrap();
|
||||
assert_eq!(result, "—");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_decode_pdf_string_pdfdocencoding_quotes() {
|
||||
// Left double quote (octal 250)
|
||||
let left = [0o250];
|
||||
assert_eq!(decode_pdf_string(&left).unwrap(), "\u{201C}");
|
||||
|
||||
// Right double quote (octal 251)
|
||||
let right = [0o251];
|
||||
assert_eq!(decode_pdf_string(&right).unwrap(), "\u{201D}");
|
||||
|
||||
// Left single quote (octal 252)
|
||||
let left_single = [0o252];
|
||||
assert_eq!(decode_pdf_string(&left_single).unwrap(), "\u{2018}");
|
||||
|
||||
// Right single quote (octal 253)
|
||||
let right_single = [0o253];
|
||||
assert_eq!(decode_pdf_string(&right_single).unwrap(), "\u{2019}");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_decode_pdf_string_empty() {
|
||||
let empty: [u8; 0] = [];
|
||||
let result = decode_pdf_string(&empty).unwrap();
|
||||
assert_eq!(result, "");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_looks_like_utf16be() {
|
||||
// ASCII text in UTF-16BE: [0x00, char_code]
|
||||
let ascii_utf16be = [0x00, 0x41, 0x00, 0x42, 0x00, 0x43]; // "ABC"
|
||||
assert!(looks_like_utf16be(&ascii_utf16be));
|
||||
|
||||
// Regular UTF-8 (not UTF-16BE)
|
||||
let utf8 = [0x41, 0x42, 0x43]; // "ABC"
|
||||
assert!(!looks_like_utf16be(&utf8));
|
||||
|
||||
// Empty
|
||||
assert!(!looks_like_utf16be(&[]));
|
||||
|
||||
// Odd length
|
||||
assert!(!looks_like_utf16be(&[0x00, 0x41, 0x00]));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_text_value_basic() {
|
||||
let value = PdfObject::String(Box::new(b"John Doe".to_vec()));
|
||||
let flags = 0;
|
||||
|
||||
let result = extract_text_value(Some(&value), None, flags, None);
|
||||
|
||||
assert_eq!(result.value, Some("John Doe".to_string()));
|
||||
assert_eq!(result.default, None);
|
||||
assert!(!result.multiline);
|
||||
assert_eq!(result.max_length, None);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_text_value_with_default() {
|
||||
let value = PdfObject::String(Box::new(b"Jane".to_vec()));
|
||||
let default = PdfObject::String(Box::new(b"Default Name".to_vec()));
|
||||
let flags = 0;
|
||||
|
||||
let result = extract_text_value(Some(&value), Some(&default), flags, None);
|
||||
|
||||
assert_eq!(result.value, Some("Jane".to_string()));
|
||||
assert_eq!(result.default, Some("Default Name".to_string()));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_text_value_multiline() {
|
||||
let value = PdfObject::String(Box::new(b"Line 1\r\nLine 2".to_vec()));
|
||||
let flags = 1 << 12; // Multiline flag
|
||||
|
||||
let result = extract_text_value(Some(&value), None, flags, None);
|
||||
|
||||
assert!(result.multiline);
|
||||
assert_eq!(result.value, Some("Line 1\r\nLine 2".to_string()));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_text_value_with_max_length() {
|
||||
let value = PdfObject::String(Box::new(b"Test".to_vec()));
|
||||
let flags = 0;
|
||||
let max_len = 50;
|
||||
|
||||
let result = extract_text_value(Some(&value), None, flags, Some(max_len));
|
||||
|
||||
assert_eq!(result.max_length, Some(50));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_text_value_negative_max_length_ignored() {
|
||||
let value = PdfObject::String(Box::new(b"Test".to_vec()));
|
||||
let flags = 0;
|
||||
let max_len = -10;
|
||||
|
||||
let result = extract_text_value(Some(&value), None, flags, Some(max_len));
|
||||
|
||||
assert_eq!(result.max_length, None);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_text_value_empty_value() {
|
||||
let value = PdfObject::String(Box::new(vec![]));
|
||||
let flags = 0;
|
||||
|
||||
let result = extract_text_value(Some(&value), None, flags, None);
|
||||
|
||||
assert_eq!(result.value, Some("".to_string()));
|
||||
assert!(!result.is_non_empty());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_text_value_no_value() {
|
||||
let flags = 0;
|
||||
|
||||
let result = extract_text_value(None, None, flags, None);
|
||||
|
||||
assert_eq!(result.value, None);
|
||||
assert!(!result.is_non_empty());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_text_value_name_as_value() {
|
||||
// Rare case: /V as Name (e.g., /Off-style placeholder)
|
||||
let value = PdfObject::Name(intern("Off"));
|
||||
let flags = 0;
|
||||
|
||||
let result = extract_text_value(Some(&value), None, flags, None);
|
||||
|
||||
assert_eq!(result.value, Some("Off".to_string()));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_text_value_utf16be_bom() {
|
||||
let utf16be = vec
|
||||
![0xFE, 0xFF, 0x00, 0x4A, 0x00, 0x6F, 0x00, 0x68, 0x00, 0x6E]; // "John"
|
||||
let value = PdfObject::String(Box::new(utf16be));
|
||||
let flags = 0;
|
||||
|
||||
let result = extract_text_value(Some(&value), None, flags, None);
|
||||
|
||||
assert_eq!(result.value, Some("John".to_string()));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_text_value_equality() {
|
||||
let v1 = TextValue::new(Some("Test".to_string()), None, true, Some(100));
|
||||
let v2 = TextValue::new(Some("Test".to_string()), None, true, Some(100));
|
||||
let v3 = TextValue::new(Some("Other".to_string()), None, true, Some(100));
|
||||
|
||||
assert_eq!(v1, v2);
|
||||
assert_ne!(v1, v3);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_text_value_empty_constructor() {
|
||||
let empty = TextValue::empty();
|
||||
assert_eq!(empty.value, None);
|
||||
assert_eq!(empty.default, None);
|
||||
assert!(!empty.multiline);
|
||||
assert_eq!(empty.max_length, None);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_string_from_value_unrecognized_type() {
|
||||
// Integer value should return None (unrecognized type)
|
||||
let value = PdfObject::Integer(42);
|
||||
let result = extract_string_from_value(Some(&value));
|
||||
assert!(result.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_decode_pdf_string_never_panics() {
|
||||
// Test that decoding doesn't panic on arbitrary input
|
||||
let arbitrary: Vec<u8> = vec![0xFF, 0xFE, 0xFD, 0x00, 0x01, 0x02];
|
||||
let _ = decode_pdf_string(&arbitrary); // Should not panic
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_text_value_combined_flags() {
|
||||
let value = PdfObject::String(Box::new(b"Test".to_vec()));
|
||||
// ReadOnly (bit 1) + Required (bit 2) + Multiline (bit 12)
|
||||
let flags = 1 | 2 | (1 << 12);
|
||||
|
||||
let result = extract_text_value(Some(&value), None, flags, None);
|
||||
|
||||
// Only multiline flag is relevant for TextValue
|
||||
assert!(result.multiline);
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Reference in a new issue