micropdf 0.17.0

A pure Rust PDF library - A pure Rust PDF library with fz_/pdf_ API compatibility
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155

//! PDF Object Copy Operations FFI Functions

use super::super::Handle;
use super::refcount::with_obj;
use super::types::{PDF_OBJECTS, PdfObj, PdfObjHandle, PdfObjType};

#[unsafe(no_mangle)]
pub extern "C" fn pdf_copy_array(_ctx: Handle, _doc: Handle, array: PdfObjHandle) -> PdfObjHandle {
    let copied = with_obj(array, None, |o| match &o.obj_type {
        PdfObjType::Array(arr) => {
            let mut new_arr = PdfObj::new_array(arr.len());
            if let PdfObjType::Array(ref mut new_vec) = new_arr.obj_type {
                for item in arr {
                    new_vec.push(item.clone());
                }
            }
            Some(new_arr)
        }
        _ => None,
    });

    match copied {
        Some(obj) => PDF_OBJECTS.insert(obj),
        None => 0,
    }
}

#[unsafe(no_mangle)]
pub extern "C" fn pdf_copy_dict(_ctx: Handle, _doc: Handle, dict: PdfObjHandle) -> PdfObjHandle {
    let copied = with_obj(dict, None, |o| match &o.obj_type {
        PdfObjType::Dict(entries) => {
            let mut new_dict = PdfObj::new_dict(entries.len());
            if let PdfObjType::Dict(ref mut new_entries) = new_dict.obj_type {
                for (k, v) in entries {
                    new_entries.push((k.clone(), v.clone()));
                }
            }
            Some(new_dict)
        }
        _ => None,
    });

    match copied {
        Some(obj) => PDF_OBJECTS.insert(obj),
        None => 0,
    }
}

fn deep_copy_obj_inner(obj: &PdfObj) -> PdfObj {
    let new_type = match &obj.obj_type {
        PdfObjType::Null => PdfObjType::Null,
        PdfObjType::Bool(b) => PdfObjType::Bool(*b),
        PdfObjType::Int(i) => PdfObjType::Int(*i),
        PdfObjType::Real(r) => PdfObjType::Real(*r),
        PdfObjType::Name(s) => PdfObjType::Name(s.clone()),
        PdfObjType::String(s) => PdfObjType::String(s.clone()),
        PdfObjType::Array(arr) => PdfObjType::Array(arr.iter().map(deep_copy_obj_inner).collect()),
        PdfObjType::Dict(entries) => PdfObjType::Dict(
            entries
                .iter()
                .map(|(k, v)| (k.clone(), deep_copy_obj_inner(v)))
                .collect(),
        ),
        PdfObjType::Indirect { num, generation } => PdfObjType::Indirect {
            num: *num,
            generation: *generation,
        },
        PdfObjType::Stream { dict, data } => PdfObjType::Stream {
            dict: Box::new(deep_copy_obj_inner(dict)),
            data: data.clone(),
        },
    };

    PdfObj {
        obj_type: new_type,
        marked: false,
        dirty: false,
        parent_num: 0,
        refs: 1,
    }
}

#[unsafe(no_mangle)]
pub extern "C" fn pdf_deep_copy_obj(_ctx: Handle, _doc: Handle, obj: PdfObjHandle) -> PdfObjHandle {
    let copied = with_obj(obj, None, |o| Some(deep_copy_obj_inner(o)));

    match copied {
        Some(new_obj) => PDF_OBJECTS.insert(new_obj),
        None => 0,
    }
}

#[cfg(test)]
mod tests {
    use super::super::create::{pdf_new_dict, pdf_new_indirect, pdf_new_name, pdf_new_string};
    use super::super::refcount::pdf_drop_obj;
    use super::super::types::{PDF_OBJECTS, PdfObj, PdfObjType};
    use super::*;
    use std::ffi::CString;

    #[test]
    fn test_pdf_copy_array_non_array() {
        let int_obj = super::super::create::pdf_new_int(0, 42);
        let result = pdf_copy_array(0, 0, int_obj);
        assert_eq!(result, 0);
    }

    #[test]
    fn test_pdf_copy_dict_non_dict() {
        let int_obj = super::super::create::pdf_new_int(0, 42);
        let result = pdf_copy_dict(0, 0, int_obj);
        assert_eq!(result, 0);
    }

    #[test]
    fn test_pdf_deep_copy_indirect() {
        let indirect = pdf_new_indirect(0, 0, 10, 2);
        let copy = pdf_deep_copy_obj(0, 0, indirect);
        assert_ne!(copy, 0);
        pdf_drop_obj(0, copy);
        pdf_drop_obj(0, indirect);
    }

    #[test]
    fn test_pdf_deep_copy_stream() {
        let stream_dict = PdfObj::new_dict(0);
        let stream_obj = PdfObj {
            obj_type: PdfObjType::Stream {
                dict: Box::new(stream_dict),
                data: vec![1, 2, 3],
            },
            marked: false,
            dirty: false,
            parent_num: 0,
            refs: 1,
        };
        let handle = PDF_OBJECTS.insert(stream_obj);
        let copy = pdf_deep_copy_obj(0, 0, handle);
        assert_ne!(copy, 0);
        pdf_drop_obj(0, copy);
        pdf_drop_obj(0, handle);
    }

    #[test]
    fn test_pdf_deep_copy_with_name_and_string() {
        let dict = pdf_new_dict(0, 0, 2);
        let key = pdf_new_name(0, CString::new("Key").unwrap().as_ptr());
        let val = pdf_new_string(0, b"value".as_ptr() as *const i8, 5);
        super::super::dict::pdf_dict_put(0, dict, key, val);
        let copy = pdf_deep_copy_obj(0, 0, dict);
        assert_ne!(copy, 0);
        pdf_drop_obj(0, copy);
        pdf_drop_obj(0, dict);
    }
}