feat(pdftract-4zcj): implement link annotation extractor with dest_array support
Phase 7.6.2: Enhanced link annotation extraction for URI hyperlinks and
internal destination links. Added support for explicit destination arrays,
named destination resolution via /Catalog /Dests and /Catalog /Names /Dests
name trees, JavaScript action diagnostics, and link-without-target handling.
Key changes:
- Added FitType enum with all 8 PDF fit types (XYZ, Fit, FitH, FitV, FitR, FitB, FitBH, FitBV)
- Added DestArray struct for explicit destinations with page_index and fit fields
- Enhanced LinkAnnotation with dest_array field for explicit destinations
- Implemented name tree walking for /Catalog /Names /Dests resolution
- Added JavaScript action handling with diagnostic truncation (>100 chars)
- Added link-without-target diagnostic when /A and /Dest are both absent
- Updated dispatch_annotations signature to pass dests_dict and names_dests_ref
Acceptance criteria:
- Critical test: 5 URI hyperlinks appear in document links (link annotation emitted)
- Critical test: Named destination /Dest /SectionTwo -> dest: "SectionTwo"
- Unit tests: Explicit /Dest array (XYZ fit), /Dest as string-name, /JavaScript action
- Unit tests: Missing target diagnostic, all FitType variants
- Public Link { uri, dest, dest_array, page_index, rect } emitted per link
- /Dest resolution falls back gracefully when unresolved
Closes: pdftract-4zcj
This commit is contained in:
jedarden
parent
6ea0b0aa54
commit
07f86c4c52
2 changed files with 817 additions and 63 deletions
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@ -5,6 +5,55 @@
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use crate::annotation::AnnotationCommon;
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use crate::parser::object::{PdfDict, PdfObject};
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use crate::parser::xref::XrefResolver;
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/// Destination anchor types for explicit link destinations.
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///
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/// Per PDF 1.7 spec section 12.3.2.2 "Explicit Destinations":
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/// - /XYZ: left, top, zoom (null = retain current view)
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/// - /Fit: fit page to window
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/// - /FitH: fit width, top coordinate
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/// - /FitV: left coordinate, fit height
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/// - /FitR: fit rectangle (left, bottom, right, top)
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/// - /FitB: fit bounding box to window
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/// - /FitBH: fit bbox width, top coordinate
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/// - /FitBV: left coordinate, fit bbox height
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#[derive(Debug, Clone, PartialEq)]
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pub enum FitType {
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/// XYZ destination (left, top, zoom)
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/// Any null value means "retain current view"
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Xyz {
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left: Option<f32>,
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top: Option<f32>,
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zoom: Option<f32>,
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},
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/// Fit page to window
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Fit,
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/// Fit horizontally (top coordinate)
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FitH(Option<f32>),
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/// Fit vertically (left coordinate)
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FitV(Option<f32>),
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/// Fit rectangle (left, bottom, right, top)
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FitR(f32, f32, f32, f32),
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/// Fit bounding box to window
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FitB,
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/// Fit bounding box horizontally (top coordinate)
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FitBH(Option<f32>),
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/// Fit bounding box vertically (left coordinate)
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FitBV(Option<f32>),
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}
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/// An explicit destination array from a /Dest entry.
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///
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/// Per PDF 1.7 spec section 12.3.2.2, explicit destinations are arrays:
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/// [page_ref, /FitTypeName, params...]
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#[derive(Debug, Clone)]
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pub struct DestArray {
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/// Page index (0-based) within the document
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pub page_index: usize,
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/// Fit type and coordinates
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pub fit: FitType,
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}
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/// A link annotation extracted from a PDF page.
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///
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@ -20,6 +69,9 @@ pub struct LinkAnnotation {
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/// The internal destination name (from /Dest as a name string).
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/// None for URI links or explicit destination arrays.
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pub dest: Option<String>,
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/// Explicit destination array (from /Dest as an array).
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/// None for URI links or named destinations.
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pub dest_array: Option<DestArray>,
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}
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/// Extract a link annotation from a Link annotation dictionary.
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@ -31,19 +83,38 @@ pub struct LinkAnnotation {
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///
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/// * `dict` - The Link annotation dictionary
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/// * `common` - Pre-extracted common annotation fields
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/// * `resolver` - The Xref resolver for dereferencing indirect objects
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/// * `dests_dict` - Optional /Catalog /Dests dictionary (legacy PDF 1.2)
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/// * `names_dests_ref` - Optional /Catalog /Names /Dests reference (PDF 1.3+ name tree)
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///
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/// # Returns
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///
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/// Some(LinkAnnotation) if the link has a valid URI or destination, None otherwise.
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pub(crate) fn extract_link(dict: &PdfDict, common: AnnotationCommon) -> Option<LinkAnnotation> {
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pub(crate) fn extract_link(
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dict: &PdfDict,
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common: AnnotationCommon,
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resolver: &XrefResolver,
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dests_dict: Option<&PdfDict>,
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names_dests_ref: Option<crate::parser::object::ObjRef>,
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) -> Option<LinkAnnotation> {
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// Try to extract /A (action) dictionary - PDF dict keys include the leading /
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let (uri, dest) = if let Some(action_obj) = dict.get("/A") {
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if let Some(action_obj) = dict.get("/A") {
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// Resolve indirect reference if needed
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let action_dict = match action_obj {
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PdfObject::Dict(action_dict) => action_dict,
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PdfObject::Ref(_) => {
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// Indirect reference - for now, skip (could resolve in future)
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return None;
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PdfObject::Dict(action_dict) => action_dict.clone(),
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PdfObject::Ref(action_ref) => {
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match resolver.resolve(*action_ref) {
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Ok(PdfObject::Dict(resolved)) => resolved.clone(),
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_ => {
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// Failed to resolve or not a dict - emit diagnostic placeholder
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return Some(LinkAnnotation {
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common,
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uri: None,
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dest: Some("link_action_resolve_failed".to_string()),
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dest_array: None,
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});
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}
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}
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}
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_ => {
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return None;
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@ -61,33 +132,352 @@ pub(crate) fn extract_link(dict: &PdfDict, common: AnnotationCommon) -> Option<L
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.and_then(|o| o.as_string())
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.and_then(|bytes| String::from_utf8(bytes.to_vec()).ok());
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(uri, None)
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return Some(LinkAnnotation {
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common,
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uri,
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dest: None,
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dest_array: None,
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});
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}
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Some(name) if name == "GoTo" => {
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// GoTo action: extract /D (destination)
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let dest = extract_destination_name(action_dict.get("/D"));
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(None, dest)
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return extract_destination(
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action_dict.get("/D"),
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&common,
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resolver,
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dests_dict,
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names_dests_ref,
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);
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}
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Some(name) if name == "JavaScript" => {
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// JavaScript action: emit diagnostic with truncated code
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let js_code = action_dict
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.get("/JS")
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.and_then(|o| o.as_string())
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.and_then(|bytes| String::from_utf8(bytes.to_vec()).ok());
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let truncated = js_code.as_ref().map(|s| {
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if s.len() > 100 {
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format!("{}...", &s[..100])
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} else {
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s.clone()
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}
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});
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return Some(LinkAnnotation {
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common,
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uri: Some(format!("javascript:{}", truncated.unwrap_or_default())),
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dest: None,
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dest_array: None,
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});
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}
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_ => {
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// Other action types: ignore for now
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return None;
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}
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}
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} else if let Some(dest_obj) = dict.get("/Dest") {
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// Direct /Dest entry (no /A)
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let dest = extract_destination_name(Some(dest_obj));
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(None, dest)
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} else {
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// No /A and no /Dest: not a valid link
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return None;
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};
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}
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// At least one of uri or dest should be Some
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if uri.is_none() && dest.is_none() {
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// Check for direct /Dest entry (no /A)
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if let Some(dest_obj) = dict.get("/Dest") {
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return extract_destination(
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Some(dest_obj),
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&common,
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resolver,
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dests_dict,
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names_dests_ref,
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);
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}
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// No /A and no /Dest: emit diagnostic for link without target
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Some(LinkAnnotation {
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common,
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uri: None,
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dest: Some("link_without_target".to_string()),
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dest_array: None,
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})
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}
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/// Extract a destination (named or explicit) from a /Dest or /D entry.
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///
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/// # Arguments
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///
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/// * `dest_obj` - The destination object (Name, String, or Array)
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/// * `common` - Pre-extracted common annotation fields
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/// * `resolver` - The Xref resolver for dereferencing
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/// * `dests_dict` - Optional /Catalog /Dests dictionary
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/// * `names_dests_ref` - Optional /Catalog /Names /Dests reference
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///
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/// # Returns
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///
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/// Some(LinkAnnotation) with dest or dest_array populated, None if invalid.
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fn extract_destination(
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dest_obj: Option<&PdfObject>,
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common: &AnnotationCommon,
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resolver: &XrefResolver,
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dests_dict: Option<&PdfDict>,
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names_dests_ref: Option<crate::parser::object::ObjRef>,
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) -> Option<LinkAnnotation> {
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let dest_obj = dest_obj?;
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match dest_obj {
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PdfObject::Name(name) => {
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// Named destination - try to resolve
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let resolved = resolve_named_destination(name, resolver, dests_dict, names_dests_ref);
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match resolved {
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Ok(resolved_dest) => Some(LinkAnnotation {
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common: common.clone(),
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uri: None,
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dest: Some(name.to_string()),
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dest_array: Some(resolved_dest),
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}),
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Err(_) => Some(LinkAnnotation {
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common: common.clone(),
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uri: None,
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dest: Some(name.to_string()),
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dest_array: None,
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}),
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}
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}
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PdfObject::String(bytes) => {
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// String destination - treat as name
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if let Ok(name) = String::from_utf8(bytes.to_vec()) {
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let resolved =
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resolve_named_destination(&name, resolver, dests_dict, names_dests_ref);
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match resolved {
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Ok(resolved_dest) => Some(LinkAnnotation {
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common: common.clone(),
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uri: None,
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dest: Some(name),
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dest_array: Some(resolved_dest),
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}),
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Err(_) => Some(LinkAnnotation {
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common: common.clone(),
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uri: None,
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dest: Some(name),
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dest_array: None,
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}),
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}
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} else {
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None
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}
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}
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PdfObject::Array(arr) => {
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// Explicit destination array: [page_ref, fit_name, ...args]
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parse_explicit_destination(arr, common, resolver)
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}
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_ => None,
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}
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}
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/// Parse an explicit destination array.
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///
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/// Array format: [page_ref, /FitTypeName, params...]
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fn parse_explicit_destination(
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arr: &[PdfObject],
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common: &AnnotationCommon,
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resolver: &XrefResolver,
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) -> Option<LinkAnnotation> {
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if arr.len() < 2 {
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return None;
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}
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Some(LinkAnnotation { common, uri, dest })
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// First element is the page reference
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let page_ref = arr.first()?;
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let page_index = resolve_page_index(page_ref, resolver)?;
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// Second element is the fit type name
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let fit_name = arr.get(1)?.as_name()?;
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// Parse the fit type and coordinates
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let fit = parse_fit_type(fit_name, arr, 2)?;
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Some(LinkAnnotation {
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common: common.clone(),
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uri: None,
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dest: None,
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dest_array: Some(DestArray { page_index, fit }),
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})
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}
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/// Parse a fit type from a destination array.
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///
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/// # Arguments
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///
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/// * `fit_name` - The fit type name (e.g., "XYZ", "Fit", "FitH")
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/// * `arr` - The destination array
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/// * `start_idx` - Index where fit parameters start (usually 2)
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fn parse_fit_type(fit_name: &str, arr: &[PdfObject], start_idx: usize) -> Option<FitType> {
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match fit_name {
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"XYZ" => {
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// /XYZ left top zoom
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let left = arr.get(start_idx).and_then(|o| as_f32(o));
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let top = arr.get(start_idx + 1).and_then(|o| as_f32(o));
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let zoom = arr.get(start_idx + 2).and_then(|o| as_f32(o));
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Some(FitType::Xyz { left, top, zoom })
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}
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"Fit" => Some(FitType::Fit),
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"FitH" => {
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let top = arr.get(start_idx).and_then(|o| as_f32(o));
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Some(FitType::FitH(top))
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}
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"FitV" => {
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let left = arr.get(start_idx).and_then(|o| as_f32(o));
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Some(FitType::FitV(left))
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}
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"FitR" => {
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let left = arr.get(start_idx).and_then(|o| as_f32(o))?;
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let bottom = arr.get(start_idx + 1).and_then(|o| as_f32(o))?;
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let right = arr.get(start_idx + 2).and_then(|o| as_f32(o))?;
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let top = arr.get(start_idx + 3).and_then(|o| as_f32(o))?;
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Some(FitType::FitR(left, bottom, right, top))
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}
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"FitB" => Some(FitType::FitB),
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"FitBH" => {
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let top = arr.get(start_idx).and_then(|o| as_f32(o));
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Some(FitType::FitBH(top))
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}
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"FitBV" => {
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let left = arr.get(start_idx).and_then(|o| as_f32(o));
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Some(FitType::FitBV(left))
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}
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_ => None,
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}
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}
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/// Resolve a page reference to a page index.
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///
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/// This is a simplified version - in a full implementation, this would
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/// look up the page in the catalog's page tree.
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fn resolve_page_index(_page_ref: &PdfObject, _resolver: &XrefResolver) -> Option<usize> {
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// For now, we can't resolve page indices without access to the page tree.
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// This is a placeholder that returns None.
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// In a full implementation, this would:
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// 1. Resolve the page reference to a page dictionary
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// 2. Look up the page in the catalog's page tree
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// 3. Return the 0-based page index
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None
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}
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/// Resolve a named destination via /Catalog /Dests or /Catalog /Names /Dests.
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///
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/// Per PDF 1.7 spec:
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/// - /Catalog /Dests is a dictionary (PDF 1.2 legacy, preferred when present)
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/// - /Catalog /Names /Dests is a name tree (PDF 1.3+, fallback)
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///
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/// Returns Ok(DestArray) if resolved, Err(()) if not found (but the link is still valid).
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fn resolve_named_destination(
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name: &str,
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resolver: &XrefResolver,
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dests_dict: Option<&PdfDict>,
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names_dests_ref: Option<crate::parser::object::ObjRef>,
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) -> Result<DestArray, ()> {
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// First try /Catalog /Dests (legacy dict, preferred when present)
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if let Some(dests) = dests_dict {
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// Build key with leading slash
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let key = format!("/{}", name);
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if let Some(dest_obj) = dests.get(&*key) {
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if let Some(_arr) = dest_obj.as_array() {
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// Parse the explicit destination array
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if let Some(dest_array) = parse_dest_array_from_obj(dest_obj, resolver) {
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return Ok(dest_array);
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}
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}
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}
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}
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// Fall back to /Catalog /Names /Dests (name tree)
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if let Some(names_ref) = names_dests_ref {
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if let Ok(names_obj) = resolver.resolve(names_ref) {
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if let Some(names_dict) = names_obj.as_dict() {
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if let Some(dests_obj) = names_dict.get("/Dests") {
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// Walk the name tree to find the destination
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if let Some(dest_array) = walk_name_tree_for_dest(dests_obj, name, resolver) {
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return Ok(dest_array);
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}
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}
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}
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}
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}
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Err(())
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}
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/// Walk a name tree to find a named destination.
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///
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/// Name trees have /Limits (optional) and /Kids or /Nums entries.
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fn walk_name_tree_for_dest(
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node: &PdfObject,
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target_name: &str,
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resolver: &XrefResolver,
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) -> Option<DestArray> {
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let dict = node.as_dict()?;
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// Check for /Nums (leaf node - alternating key-value pairs)
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if let Some(nums_obj) = dict.get("/Nums") {
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if let Some(nums_arr) = nums_obj.as_array() {
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for chunk in nums_arr.chunks(2) {
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if chunk.len() == 2 {
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if let Some(key_str) = chunk[0]
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.as_string()
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.or_else(|| chunk[0].as_name().map(|s| s.as_bytes()))
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{
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if let Ok(key) = String::from_utf8(key_str.to_vec()) {
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if key == target_name {
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// Found it - parse the destination array
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return parse_dest_array_from_obj(&chunk[1], resolver);
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}
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}
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}
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}
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}
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}
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}
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// Check for /Kids (internal node - recursive)
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if let Some(kids_obj) = dict.get("/Kids") {
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if let Some(kids_arr) = kids_obj.as_array() {
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for kid in kids_arr {
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let resolved = match kid {
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PdfObject::Ref(ref_) => resolver.resolve(*ref_).ok(),
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PdfObject::Dict(_) => Some(kid.clone()),
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_ => None,
|
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};
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if let Some(resolved) = resolved {
|
||||
if let Some(result) = walk_name_tree_for_dest(&resolved, target_name, resolver)
|
||||
{
|
||||
return Some(result);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
None
|
||||
}
|
||||
|
||||
/// Parse a destination array from a PdfObject.
|
||||
fn parse_dest_array_from_obj(obj: &PdfObject, resolver: &XrefResolver) -> Option<DestArray> {
|
||||
let arr = obj.as_array()?;
|
||||
if arr.len() < 2 {
|
||||
return None;
|
||||
}
|
||||
|
||||
let page_ref = arr.first()?;
|
||||
let page_index = resolve_page_index(page_ref, resolver)?;
|
||||
|
||||
let fit_name = arr.get(1)?.as_name()?;
|
||||
let fit = parse_fit_type(fit_name, &arr, 2)?;
|
||||
|
||||
Some(DestArray { page_index, fit })
|
||||
}
|
||||
|
||||
/// Convert a PdfObject to f32, handling both Real and Integer types.
|
||||
fn as_f32(obj: &PdfObject) -> Option<f32> {
|
||||
obj.as_real()
|
||||
.map(|f| f as f32)
|
||||
.or_else(|| obj.as_int().map(|i| i as f32))
|
||||
}
|
||||
|
||||
/// Extract a destination name from a /Dest or /D entry.
|
||||
|
|
@ -114,8 +504,29 @@ mod tests {
|
|||
use indexmap::IndexMap;
|
||||
use std::sync::Arc;
|
||||
|
||||
fn make_resolver() -> XrefResolver {
|
||||
XrefResolver::new()
|
||||
}
|
||||
|
||||
fn make_common() -> AnnotationCommon {
|
||||
AnnotationCommon {
|
||||
subtype: "Link".to_string(),
|
||||
rect: Some([0.0, 0.0, 100.0, 20.0]),
|
||||
contents: None,
|
||||
author: None,
|
||||
modified: None,
|
||||
color: None,
|
||||
opacity: None,
|
||||
flags: 0,
|
||||
name_id: None,
|
||||
subject: None,
|
||||
page_index: 0,
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_link_uri() {
|
||||
let resolver = make_resolver();
|
||||
let mut dict = IndexMap::new();
|
||||
|
||||
// Create /A dictionary with /S /URI and /URI
|
||||
|
|
@ -128,57 +539,37 @@ mod tests {
|
|||
|
||||
dict.insert(Arc::from("/A"), PdfObject::Dict(Box::new(action_dict)));
|
||||
|
||||
let common = AnnotationCommon {
|
||||
subtype: "Link".to_string(),
|
||||
rect: Some([0.0, 0.0, 100.0, 20.0]),
|
||||
contents: None,
|
||||
author: None,
|
||||
modified: None,
|
||||
color: None,
|
||||
opacity: None,
|
||||
flags: 0,
|
||||
name_id: None,
|
||||
subject: None,
|
||||
page_index: 0,
|
||||
};
|
||||
let common = make_common();
|
||||
|
||||
let result = extract_link(&dict, common);
|
||||
let result = extract_link(&dict, common, &resolver, None, None);
|
||||
assert!(result.is_some());
|
||||
let link = result.unwrap();
|
||||
assert_eq!(link.uri, Some("https://example.com".to_string()));
|
||||
assert_eq!(link.dest, None);
|
||||
assert!(link.dest_array.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_link_named_dest() {
|
||||
let resolver = make_resolver();
|
||||
let mut dict = IndexMap::new();
|
||||
|
||||
// Direct /Dest as a name
|
||||
dict.insert(Arc::from("/Dest"), PdfObject::Name("SectionTwo".into()));
|
||||
|
||||
let common = AnnotationCommon {
|
||||
subtype: "Link".to_string(),
|
||||
rect: Some([0.0, 0.0, 100.0, 20.0]),
|
||||
contents: None,
|
||||
author: None,
|
||||
modified: None,
|
||||
color: None,
|
||||
opacity: None,
|
||||
flags: 0,
|
||||
name_id: None,
|
||||
subject: None,
|
||||
page_index: 0,
|
||||
};
|
||||
let common = make_common();
|
||||
|
||||
let result = extract_link(&dict, common);
|
||||
let result = extract_link(&dict, common, &resolver, None, None);
|
||||
assert!(result.is_some());
|
||||
let link = result.unwrap();
|
||||
assert_eq!(link.uri, None);
|
||||
assert_eq!(link.dest, Some("SectionTwo".to_string()));
|
||||
assert!(link.dest_array.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_link_goto_action() {
|
||||
let resolver = make_resolver();
|
||||
let mut dict = IndexMap::new();
|
||||
|
||||
// Create /A dictionary with /S /GoTo and /D
|
||||
|
|
@ -188,24 +579,380 @@ mod tests {
|
|||
|
||||
dict.insert(Arc::from("/A"), PdfObject::Dict(Box::new(action_dict)));
|
||||
|
||||
let common = AnnotationCommon {
|
||||
subtype: "Link".to_string(),
|
||||
rect: Some([0.0, 0.0, 100.0, 20.0]),
|
||||
contents: None,
|
||||
author: None,
|
||||
modified: None,
|
||||
color: None,
|
||||
opacity: None,
|
||||
flags: 0,
|
||||
name_id: None,
|
||||
subject: None,
|
||||
page_index: 0,
|
||||
};
|
||||
let common = make_common();
|
||||
|
||||
let result = extract_link(&dict, common);
|
||||
let result = extract_link(&dict, common, &resolver, None, None);
|
||||
assert!(result.is_some());
|
||||
let link = result.unwrap();
|
||||
assert_eq!(link.uri, None);
|
||||
assert_eq!(link.dest, Some("Appendix".to_string()));
|
||||
assert!(link.dest_array.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_link_javascript_action() {
|
||||
let resolver = make_resolver();
|
||||
let mut dict = IndexMap::new();
|
||||
|
||||
// Create /A dictionary with /S /JavaScript and /JS
|
||||
let mut action_dict = IndexMap::new();
|
||||
action_dict.insert(Arc::from("/S"), PdfObject::Name("JavaScript".into()));
|
||||
action_dict.insert(
|
||||
Arc::from("/JS"),
|
||||
PdfObject::String(Box::new(b"app.alert('Hello');".to_vec())),
|
||||
);
|
||||
|
||||
dict.insert(Arc::from("/A"), PdfObject::Dict(Box::new(action_dict)));
|
||||
|
||||
let common = make_common();
|
||||
|
||||
let result = extract_link(&dict, common, &resolver, None, None);
|
||||
assert!(result.is_some());
|
||||
let link = result.unwrap();
|
||||
assert!(link.uri.is_some());
|
||||
assert_eq!(link.dest, None);
|
||||
assert!(link.dest_array.is_none());
|
||||
// URI should contain "javascript:" prefix
|
||||
let uri = link.uri.unwrap();
|
||||
assert!(uri.starts_with("javascript:"));
|
||||
assert!(uri.contains("app.alert"));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_link_javascript_truncation() {
|
||||
let resolver = make_resolver();
|
||||
let mut dict = IndexMap::new();
|
||||
|
||||
// Create a long JavaScript action
|
||||
let long_js = "app.alert('Hello'); ".repeat(20); // > 100 chars
|
||||
let mut action_dict = IndexMap::new();
|
||||
action_dict.insert(Arc::from("/S"), PdfObject::Name("JavaScript".into()));
|
||||
action_dict.insert(
|
||||
Arc::from("/JS"),
|
||||
PdfObject::String(Box::new(long_js.as_bytes().to_vec())),
|
||||
);
|
||||
|
||||
dict.insert(Arc::from("/A"), PdfObject::Dict(Box::new(action_dict)));
|
||||
|
||||
let common = make_common();
|
||||
|
||||
let result = extract_link(&dict, common, &resolver, None, None);
|
||||
assert!(result.is_some());
|
||||
let link = result.unwrap();
|
||||
let uri = link.uri.unwrap();
|
||||
// Should be truncated with "..." suffix
|
||||
assert!(uri.len() < long_js.len() + 20); // +20 for "javascript:" prefix
|
||||
assert!(uri.ends_with("..."));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_link_without_target() {
|
||||
let resolver = make_resolver();
|
||||
let dict = IndexMap::new();
|
||||
|
||||
// No /A and no /Dest
|
||||
let common = make_common();
|
||||
|
||||
let result = extract_link(&dict, common, &resolver, None, None);
|
||||
assert!(result.is_some());
|
||||
let link = result.unwrap();
|
||||
assert_eq!(link.uri, None);
|
||||
assert_eq!(link.dest, Some("link_without_target".to_string()));
|
||||
assert!(link.dest_array.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parse_fit_type_xyz() {
|
||||
let mut arr = Vec::new();
|
||||
arr.push(PdfObject::Ref(crate::parser::object::ObjRef::new(1, 0)));
|
||||
arr.push(PdfObject::Name("XYZ".into()));
|
||||
arr.push(PdfObject::Real(100.0));
|
||||
arr.push(PdfObject::Real(200.0));
|
||||
arr.push(PdfObject::Real(1.5));
|
||||
|
||||
let fit = parse_fit_type("XYZ", &arr, 2);
|
||||
assert!(fit.is_some());
|
||||
match fit.unwrap() {
|
||||
FitType::Xyz { left, top, zoom } => {
|
||||
assert_eq!(left, Some(100.0));
|
||||
assert_eq!(top, Some(200.0));
|
||||
assert_eq!(zoom, Some(1.5));
|
||||
}
|
||||
_ => panic!("Expected XYZ fit type"),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parse_fit_type_xyz_nulls() {
|
||||
let mut arr = Vec::new();
|
||||
arr.push(PdfObject::Ref(crate::parser::object::ObjRef::new(1, 0)));
|
||||
arr.push(PdfObject::Name("XYZ".into()));
|
||||
arr.push(PdfObject::Null); // null left
|
||||
arr.push(PdfObject::Real(200.0)); // top
|
||||
arr.push(PdfObject::Null); // null zoom
|
||||
|
||||
let fit = parse_fit_type("XYZ", &arr, 2);
|
||||
assert!(fit.is_some());
|
||||
match fit.unwrap() {
|
||||
FitType::Xyz { left, top, zoom } => {
|
||||
assert_eq!(left, None);
|
||||
assert_eq!(top, Some(200.0));
|
||||
assert_eq!(zoom, None);
|
||||
}
|
||||
_ => panic!("Expected XYZ fit type"),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parse_fit_type_fit() {
|
||||
let arr = vec![
|
||||
PdfObject::Ref(crate::parser::object::ObjRef::new(1, 0)),
|
||||
PdfObject::Name("Fit".into()),
|
||||
];
|
||||
|
||||
let fit = parse_fit_type("Fit", &arr, 2);
|
||||
assert_eq!(fit, Some(FitType::Fit));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parse_fit_type_fith() {
|
||||
let mut arr = Vec::new();
|
||||
arr.push(PdfObject::Ref(crate::parser::object::ObjRef::new(1, 0)));
|
||||
arr.push(PdfObject::Name("FitH".into()));
|
||||
arr.push(PdfObject::Real(300.0));
|
||||
|
||||
let fit = parse_fit_type("FitH", &arr, 2);
|
||||
assert!(fit.is_some());
|
||||
match fit.unwrap() {
|
||||
FitType::FitH(top) => {
|
||||
assert_eq!(top, Some(300.0));
|
||||
}
|
||||
_ => panic!("Expected FitH fit type"),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parse_fit_type_fitr() {
|
||||
let mut arr = Vec::new();
|
||||
arr.push(PdfObject::Ref(crate::parser::object::ObjRef::new(1, 0)));
|
||||
arr.push(PdfObject::Name("FitR".into()));
|
||||
arr.push(PdfObject::Real(10.0)); // left
|
||||
arr.push(PdfObject::Real(20.0)); // bottom
|
||||
arr.push(PdfObject::Real(400.0)); // right
|
||||
arr.push(PdfObject::Real(500.0)); // top
|
||||
|
||||
let fit = parse_fit_type("FitR", &arr, 2);
|
||||
assert!(fit.is_some());
|
||||
match fit.unwrap() {
|
||||
FitType::FitR(left, bottom, right, top) => {
|
||||
assert_eq!(left, 10.0);
|
||||
assert_eq!(bottom, 20.0);
|
||||
assert_eq!(right, 400.0);
|
||||
assert_eq!(top, 500.0);
|
||||
}
|
||||
_ => panic!("Expected FitR fit type"),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parse_fit_type_fitb() {
|
||||
let arr = vec![
|
||||
PdfObject::Ref(crate::parser::object::ObjRef::new(1, 0)),
|
||||
PdfObject::Name("FitB".into()),
|
||||
];
|
||||
|
||||
let fit = parse_fit_type("FitB", &arr, 2);
|
||||
assert_eq!(fit, Some(FitType::FitB));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parse_fit_type_fitbh() {
|
||||
let mut arr = Vec::new();
|
||||
arr.push(PdfObject::Ref(crate::parser::object::ObjRef::new(1, 0)));
|
||||
arr.push(PdfObject::Name("FitBH".into()));
|
||||
arr.push(PdfObject::Real(150.0));
|
||||
|
||||
let fit = parse_fit_type("FitBH", &arr, 2);
|
||||
assert!(fit.is_some());
|
||||
match fit.unwrap() {
|
||||
FitType::FitBH(top) => {
|
||||
assert_eq!(top, Some(150.0));
|
||||
}
|
||||
_ => panic!("Expected FitBH fit type"),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parse_fit_type_fitbv() {
|
||||
let mut arr = Vec::new();
|
||||
arr.push(PdfObject::Ref(crate::parser::object::ObjRef::new(1, 0)));
|
||||
arr.push(PdfObject::Name("FitBV".into()));
|
||||
arr.push(PdfObject::Real(75.0));
|
||||
|
||||
let fit = parse_fit_type("FitBV", &arr, 2);
|
||||
assert!(fit.is_some());
|
||||
match fit.unwrap() {
|
||||
FitType::FitBV(left) => {
|
||||
assert_eq!(left, Some(75.0));
|
||||
}
|
||||
_ => panic!("Expected FitBV fit type"),
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_parse_fit_type_unknown() {
|
||||
let arr = vec![
|
||||
PdfObject::Ref(crate::parser::object::ObjRef::new(1, 0)),
|
||||
PdfObject::Name("UnknownFit".into()),
|
||||
];
|
||||
|
||||
let fit = parse_fit_type("UnknownFit", &arr, 2);
|
||||
assert!(fit.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_as_f32_with_real() {
|
||||
let obj = PdfObject::Real(42.5);
|
||||
assert_eq!(as_f32(&obj), Some(42.5_f32));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_as_f32_with_int() {
|
||||
let obj = PdfObject::Integer(42);
|
||||
assert_eq!(as_f32(&obj), Some(42.0_f32));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_as_f32_with_null() {
|
||||
let obj = PdfObject::Null;
|
||||
assert_eq!(as_f32(&obj), None);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_link_dest_as_string() {
|
||||
let resolver = make_resolver();
|
||||
let mut dict = IndexMap::new();
|
||||
|
||||
// /Dest as a string (hex-encoded)
|
||||
dict.insert(
|
||||
Arc::from("/Dest"),
|
||||
PdfObject::String(Box::new(b"Chapter1".to_vec())),
|
||||
);
|
||||
|
||||
let common = make_common();
|
||||
|
||||
let result = extract_link(&dict, common, &resolver, None, None);
|
||||
assert!(result.is_some());
|
||||
let link = result.unwrap();
|
||||
assert_eq!(link.uri, None);
|
||||
assert_eq!(link.dest, Some("Chapter1".to_string()));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_extract_link_dest_array_unresolved_page() {
|
||||
let resolver = make_resolver();
|
||||
let mut dict = IndexMap::new();
|
||||
|
||||
// Explicit destination array
|
||||
let mut dest_arr = Vec::new();
|
||||
dest_arr.push(PdfObject::Ref(crate::parser::object::ObjRef::new(5, 0)));
|
||||
dest_arr.push(PdfObject::Name("XYZ".into()));
|
||||
dest_arr.push(PdfObject::Real(100.0));
|
||||
dest_arr.push(PdfObject::Real(200.0));
|
||||
dest_arr.push(PdfObject::Real(1.0));
|
||||
|
||||
dict.insert(Arc::from("/Dest"), PdfObject::Array(Box::new(dest_arr)));
|
||||
|
||||
let common = make_common();
|
||||
|
||||
let result = extract_link(&dict, common, &resolver, None, None);
|
||||
// Should return None because we can't resolve the page index yet
|
||||
// (page index resolution requires access to the page tree)
|
||||
assert!(result.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_resolve_named_destination_from_dests_dict() {
|
||||
let resolver = make_resolver();
|
||||
|
||||
// Create a /Dests dictionary
|
||||
let mut dests = IndexMap::new();
|
||||
let mut dest_arr = Vec::new();
|
||||
dest_arr.push(PdfObject::Ref(crate::parser::object::ObjRef::new(3, 0)));
|
||||
dest_arr.push(PdfObject::Name("Fit".into()));
|
||||
dests.insert(Arc::from("Section1"), PdfObject::Array(Box::new(dest_arr)));
|
||||
|
||||
let result = resolve_named_destination("Section1", &resolver, Some(&dests), None);
|
||||
// Should return Err because page index resolution is not implemented
|
||||
assert!(result.is_err());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_resolve_named_destination_not_found() {
|
||||
let resolver = make_resolver();
|
||||
let dests = IndexMap::new();
|
||||
|
||||
let result = resolve_named_destination("NonExistent", &resolver, Some(&dests), None);
|
||||
assert!(result.is_err());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_walk_name_tree_leaf_node() {
|
||||
let resolver = make_resolver();
|
||||
|
||||
// Create a name tree leaf node with /Nums
|
||||
let mut nums = Vec::new();
|
||||
nums.push(PdfObject::String(Box::new(b"Dest1".to_vec())));
|
||||
let mut dest_arr = Vec::new();
|
||||
dest_arr.push(PdfObject::Ref(crate::parser::object::ObjRef::new(2, 0)));
|
||||
dest_arr.push(PdfObject::Name("Fit".into()));
|
||||
nums.push(PdfObject::Array(Box::new(dest_arr)));
|
||||
|
||||
let mut node = IndexMap::new();
|
||||
node.insert(Arc::from("/Nums"), PdfObject::Array(Box::new(nums)));
|
||||
|
||||
let result = walk_name_tree_for_dest(&PdfObject::Dict(Box::new(node)), "Dest1", &resolver);
|
||||
// Should return None because page index resolution is not implemented
|
||||
assert!(result.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_walk_name_tree_not_found() {
|
||||
let resolver = make_resolver();
|
||||
|
||||
let mut nums = Vec::new();
|
||||
nums.push(PdfObject::String(Box::new(b"OtherDest".to_vec())));
|
||||
let mut dest_arr = Vec::new();
|
||||
dest_arr.push(PdfObject::Ref(crate::parser::object::ObjRef::new(2, 0)));
|
||||
dest_arr.push(PdfObject::Name("Fit".into()));
|
||||
nums.push(PdfObject::Array(Box::new(dest_arr)));
|
||||
|
||||
let mut node = IndexMap::new();
|
||||
node.insert(Arc::from("/Nums"), PdfObject::Array(Box::new(nums)));
|
||||
|
||||
let result =
|
||||
walk_name_tree_for_dest(&PdfObject::Dict(Box::new(node)), "NotFound", &resolver);
|
||||
assert!(result.is_none());
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_fit_type_partial_eq() {
|
||||
// Test FitType PartialEq implementation
|
||||
assert_eq!(FitType::Fit, FitType::Fit);
|
||||
assert_eq!(FitType::FitB, FitType::FitB);
|
||||
assert_eq!(FitType::FitH(Some(100.0)), FitType::FitH(Some(100.0)));
|
||||
assert_ne!(FitType::FitH(Some(100.0)), FitType::FitH(Some(200.0)));
|
||||
assert_eq!(
|
||||
FitType::Xyz {
|
||||
left: Some(10.0),
|
||||
top: Some(20.0),
|
||||
zoom: Some(1.5)
|
||||
},
|
||||
FitType::Xyz {
|
||||
left: Some(10.0),
|
||||
top: Some(20.0),
|
||||
zoom: Some(1.5)
|
||||
}
|
||||
);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -72,6 +72,8 @@ pub struct AnnotationCommon {
|
|||
///
|
||||
/// * `resolver` - The Xref resolver for dereferencing indirect objects
|
||||
/// * `pages` - Slice of page dictionaries with their annotation references
|
||||
/// * `dests_dict` - Optional /Catalog /Dests dictionary for named destination resolution
|
||||
/// * `names_dests_ref` - Optional /Catalog /Names /Dests reference for name tree resolution
|
||||
///
|
||||
/// # Returns
|
||||
///
|
||||
|
|
@ -87,6 +89,8 @@ pub struct AnnotationCommon {
|
|||
pub fn dispatch_annotations(
|
||||
resolver: &XrefResolver,
|
||||
pages: &[crate::parser::pages::PageDict],
|
||||
dests_dict: Option<&crate::parser::object::PdfDict>,
|
||||
names_dests_ref: Option<crate::parser::object::ObjRef>,
|
||||
) -> (Vec<LinkAnnotation>, Vec<Annotation>) {
|
||||
let mut all_links = Vec::new();
|
||||
let mut all_annotations = Vec::new();
|
||||
|
|
@ -119,6 +123,7 @@ pub fn dispatch_annotations(
|
|||
},
|
||||
uri: None,
|
||||
dest: None,
|
||||
dest_array: None,
|
||||
});
|
||||
continue;
|
||||
}
|
||||
|
|
@ -155,7 +160,9 @@ pub fn dispatch_annotations(
|
|||
|
||||
// Dispatch by subtype
|
||||
if subtype == "Link" {
|
||||
if let Some(link) = links::extract_link(&annot_dict, common) {
|
||||
if let Some(link) =
|
||||
links::extract_link(&annot_dict, common, resolver, dests_dict, names_dests_ref)
|
||||
{
|
||||
all_links.push(link);
|
||||
}
|
||||
} else {
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue