pdfium 0.10.3

Modern Rust interface to PDFium, the PDF library from Google
Documentation 
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// PDFium-rs -- Modern Rust interface to PDFium, the PDF library from Google
//
// Copyright (c) 2025-2026 Martin van der Werff <github (at) newinnovations.nl>
//
// This file is part of PDFium-rs.
//
// PDFium-rs is free software: you can redistribute it and/or modify it under the terms of
// the GNU General Public License as published by the Free Software Foundation, either version 3
// of the License, or (at your option) any later version.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

use crate::{
    error::{PdfiumError, PdfiumResult},
    lib,
    pdfium_types::{FPDF_STRUCTTREE, Handle, StructTreeHandle},
};

/// # Rust interface to FPDF_STRUCTTREE
#[derive(Debug, Clone)]
pub struct PdfiumStructTree {
    handle: StructTreeHandle,
}

impl PdfiumStructTree {
    pub(crate) fn new_from_handle(handle: FPDF_STRUCTTREE) -> PdfiumResult<Self> {
        if handle.is_null() {
            Err(PdfiumError::NullHandle)
        } else {
            Ok(Self {
                handle: Handle::new(handle, Some(close_struct_tree)),
            })
        }
    }
}

impl From<&PdfiumStructTree> for FPDF_STRUCTTREE {
    fn from(struct_tree: &PdfiumStructTree) -> Self {
        struct_tree.handle.handle()
    }
}

fn close_struct_tree(struct_tree: FPDF_STRUCTTREE) {
    lib().FPDF_StructTree_Close(struct_tree);
}