1 /*
2 * Copyright (C) 2024 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "annot.h"
18
19 #include <span>
20 #include <utility>
21 #include <vector>
22
23 #include "fpdf_annot.h"
24
25 namespace pdfClient_utils {
26
GetVisibleAnnots(FPDF_PAGE page,const std::unordered_set<int> & types_to_exclude,std::vector<ScopedFPDFAnnotation> * annots)27 void GetVisibleAnnots(FPDF_PAGE page, const std::unordered_set<int>& types_to_exclude,
28 std::vector<ScopedFPDFAnnotation>* annots) {
29 const int num_annots = FPDFPage_GetAnnotCount(page);
30 for (int i = 0; i < num_annots; ++i) {
31 ScopedFPDFAnnotation annot(FPDFPage_GetAnnot(page, i));
32 const FPDF_ANNOTATION_SUBTYPE subtype = FPDFAnnot_GetSubtype(annot.get());
33 // If the subtype is not present in types_to_exclude, add it to annots_ to hide it
34 if (types_to_exclude.find(subtype) == types_to_exclude.end()) {
35 const int annot_flags = FPDFAnnot_GetFlags(annot.get());
36 // Only worry about annots that aren't already hidden.
37 if ((annot_flags & FPDF_ANNOT_FLAG_HIDDEN) == FPDF_ANNOT_FLAG_NONE) {
38 annots->push_back(std::move(annot));
39 }
40 }
41 }
42 }
43
GetVisibleAnnotsOfType(FPDF_PAGE page,const std::unordered_set<int> & types,std::vector<ScopedFPDFAnnotation> * annots)44 void GetVisibleAnnotsOfType(FPDF_PAGE page, const std::unordered_set<int>& types,
45 std::vector<ScopedFPDFAnnotation>* annots) {
46 const int num_annots = FPDFPage_GetAnnotCount(page);
47 for (int i = 0; i < num_annots; ++i) {
48 ScopedFPDFAnnotation annot(FPDFPage_GetAnnot(page, i));
49 const FPDF_ANNOTATION_SUBTYPE subtype = FPDFAnnot_GetSubtype(annot.get());
50 if (types.find(subtype) != types.end()) {
51 const int annot_flags = FPDFAnnot_GetFlags(annot.get());
52 // Only worry about annots that aren't already hidden.
53 if ((annot_flags & FPDF_ANNOT_FLAG_HIDDEN) == FPDF_ANNOT_FLAG_NONE) {
54 annots->push_back(std::move(annot));
55 }
56 }
57 }
58 }
59
HideAnnots(std::span<const ScopedFPDFAnnotation> annots)60 void HideAnnots(std::span<const ScopedFPDFAnnotation> annots) {
61 for (const auto& annot : annots) {
62 const int annot_flags = FPDFAnnot_GetFlags(annot.get());
63 FPDFAnnot_SetFlags(annot.get(), annot_flags | FPDF_ANNOT_FLAG_HIDDEN);
64 }
65 }
66
UnhideAnnots(std::span<const ScopedFPDFAnnotation> annots)67 void UnhideAnnots(std::span<const ScopedFPDFAnnotation> annots) {
68 for (const auto& annot : annots) {
69 const int annot_flags = FPDFAnnot_GetFlags(annot.get());
70 FPDFAnnot_SetFlags(annot.get(), annot_flags & ~FPDF_ANNOT_FLAG_HIDDEN);
71 }
72 }
73
74 } // namespace pdfClient_utils