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//! Defines the [PdfPageAnnotationAttachmentPoints] struct, a collection of all the
//! attachment points that visually associate a `PdfPageAnnotation` object with one or more
//! `PdfPageObject` objects on a `PdfPage`.
use crate::bindgen::FPDF_ANNOTATION;
use crate::bindings::PdfiumLibraryBindings;
use crate::error::{PdfiumError, PdfiumInternalError};
use crate::quad_points::PdfQuadPoints;
use crate::rect::PdfRect;
use std::ops::{Range, RangeInclusive};
/// The zero-based index of a single attachment point inside its containing
/// [PdfPageAnnotationAttachmentPoints] collection.
pub type PdfPageAnnotationAttachmentPointIndex = usize;
/// A set of all the attachment points that visually connect a `PdfPageAnnotation` object
/// to one or more `PdfPageObject` objects on a `PdfPage`.
pub struct PdfPageAnnotationAttachmentPoints<'a> {
annotation_handle: FPDF_ANNOTATION,
bindings: &'a dyn PdfiumLibraryBindings,
}
impl<'a> PdfPageAnnotationAttachmentPoints<'a> {
#[inline]
pub(crate) fn from_pdfium(
annotation_handle: FPDF_ANNOTATION,
bindings: &'a dyn PdfiumLibraryBindings,
) -> Self {
PdfPageAnnotationAttachmentPoints {
annotation_handle,
bindings,
}
}
/// Returns the number of attachment points in this [PdfPageAnnotationAttachmentPoints] collection.
pub fn len(&self) -> PdfPageAnnotationAttachmentPointIndex {
if self.bindings.is_true(
self.bindings
.FPDFAnnot_HasAttachmentPoints(self.annotation_handle),
) {
self.bindings
.FPDFAnnot_CountAttachmentPoints(self.annotation_handle)
as PdfPageAnnotationAttachmentPointIndex
} else {
// Attachment points are not supported for this annotation type.
0
}
}
/// Returns `true` if this [PdfPageAnnotationAttachmentPoints] collection is empty.
#[inline]
pub fn is_empty(&self) -> bool {
self.len() == 0
}
/// Returns a Range from `0..(number of attachment points)` for this
/// [PdfPageAnnotationAttachmentPoints] collection.
#[inline]
pub fn as_range(&self) -> Range<PdfPageAnnotationAttachmentPointIndex> {
0..self.len()
}
/// Returns an inclusive Range from `0..=(number of attachment points - 1)` for this
/// [PdfPageAnnotationAttachmentPoints] collection.
#[inline]
pub fn as_range_inclusive(&self) -> RangeInclusive<PdfPageAnnotationAttachmentPointIndex> {
if self.is_empty() {
0..=0
} else {
0..=(self.len() - 1)
}
}
/// Returns a single attachment point, expressed as a set of [PdfQuadPoints], from this
/// [PdfPageAnnotationAttachmentPoints] collection.
pub fn get(
&self,
index: PdfPageAnnotationAttachmentPointIndex,
) -> Result<PdfQuadPoints, PdfiumError> {
if index >= self.len() {
return Err(PdfiumError::PageAnnotationAttachmentPointIndexOutOfBounds);
}
let mut result = PdfQuadPoints::from_rect(PdfRect::ZERO).as_pdfium();
if self
.bindings
.is_true(self.bindings.FPDFAnnot_GetAttachmentPoints(
self.annotation_handle,
index,
&mut result,
))
{
Ok(PdfQuadPoints::from_pdfium(result))
} else {
Err(PdfiumError::PdfiumLibraryInternalError(
PdfiumInternalError::Unknown,
))
}
}
/// Returns the first attachment point, expressed as a set of [PdfQuadPoints],
/// in this [PdfPageAnnotationAttachmentPoints] collection.
#[inline]
pub fn first(&self) -> Result<PdfQuadPoints, PdfiumError> {
if !self.is_empty() {
self.get(0)
} else {
Err(PdfiumError::NoAttachmentPointsInPageAnnotation)
}
}
/// Returns the last attachment point, expressed as a set of [PdfQuadPoints],
/// in this [PdfPageAnnotationAttachmentPoints] collection.
#[inline]
pub fn last(&self) -> Result<PdfQuadPoints, PdfiumError> {
if !self.is_empty() {
self.get(self.len() - 1)
} else {
Err(PdfiumError::NoAttachmentPointsInPageAnnotation)
}
}
/// Creates a new attachment point from the given set of [PdfQuadPoints],
/// and appends it to the end of this [PdfPageAnnotationAttachmentPoints] collection.
#[inline]
pub fn create_attachment_point_at_end(
&mut self,
attachment_point: PdfQuadPoints,
) -> Result<(), PdfiumError> {
if self
.bindings
.is_true(self.bindings.FPDFAnnot_AppendAttachmentPoints(
self.annotation_handle,
&attachment_point.as_pdfium(),
))
{
Ok(())
} else {
Err(PdfiumError::PdfiumLibraryInternalError(
PdfiumInternalError::Unknown,
))
}
}
/// Replaces the attachment at the given index in this [PdfPageAnnotationAttachmentPoints]
/// collection with the given updated set of [PdfQuadPoints].
pub fn set_attachment_point_at_index(
&mut self,
index: PdfPageAnnotationAttachmentPointIndex,
attachment_point: PdfQuadPoints,
) -> Result<(), PdfiumError> {
if self
.bindings
.is_true(self.bindings.FPDFAnnot_SetAttachmentPoints(
self.annotation_handle,
index,
&attachment_point.as_pdfium(),
))
{
Ok(())
} else {
Err(PdfiumError::PdfiumLibraryInternalError(
PdfiumInternalError::Unknown,
))
}
}
/// Returns an iterator over all the attachment points in this [PdfPageAnnotationAttachmentPoints] collection.
#[inline]
pub fn iter(&self) -> PdfPageAnnotationAttachmentPointsIterator {
PdfPageAnnotationAttachmentPointsIterator::new(self)
}
}
/// An iterator over all the attachment points in a [PdfPageAnnotationAttachmentPoints] collection.
pub struct PdfPageAnnotationAttachmentPointsIterator<'a> {
attachment_points: &'a PdfPageAnnotationAttachmentPoints<'a>,
next_index: PdfPageAnnotationAttachmentPointIndex,
}
impl<'a> PdfPageAnnotationAttachmentPointsIterator<'a> {
#[inline]
pub(crate) fn new(attachment_points: &'a PdfPageAnnotationAttachmentPoints<'a>) -> Self {
PdfPageAnnotationAttachmentPointsIterator {
attachment_points,
next_index: 0,
}
}
}
impl<'a> Iterator for PdfPageAnnotationAttachmentPointsIterator<'a> {
type Item = PdfQuadPoints;
fn next(&mut self) -> Option<Self::Item> {
let next = self.attachment_points.get(self.next_index);
self.next_index += 1;
next.ok()
}
}