Embedpdf/feature/digital signature#17

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
bobsingor wants to merge 7 commits into
base:embedpdf/main
Choose a base branch
from
Open

Embedpdf/feature/digital signature #17

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
7 commits
Select commit Hold shift + click to select a range
fecc517
Preparing for digitial signature
bobsingor Apr 7, 2026
00b52d3
Add raw page-field fix and sig annot handle APIs
bobsingor Apr 9, 2026
9ae6a1c
Cleanup code
bobsingor Apr 12, 2026
4ae31a9
Add revision API
bobsingor Apr 13, 2026
b0be796
Some fixes
bobsingor Apr 14, 2026
699f051
Add CollectAnnotationSupportObjectNumbers
bobsingor Apr 19, 2026
09385a2
Sync branch with main
bobsingor May 7, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 6 additions & 0 deletions constants/annotation_common.h
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -20,6 +20,12 @@ inline constexpr char kM[] = "M";
inline constexpr char kF[] = "F";
inline constexpr char kAP[] = "AP";
inline constexpr char kAS[] = "AS";
inline constexpr char kA[] = "A";
inline constexpr char kAA[] = "AA";
inline constexpr char kPopup[] = "Popup";
inline constexpr char kBS[] = "BS";
inline constexpr char kBE[] = "BE";
inline constexpr char kMK[] = "MK";
inline constexpr char kBorder[] = "Border";
inline constexpr char kC[] = "C";
inline constexpr char kStructParent[] = "StructParent";
Expand Down
6 changes: 6 additions & 0 deletions core/fpdfapi/parser/BUILD.gn
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -57,6 +57,12 @@ source_set("parser") {
"cpdf_read_validator.h",
"cpdf_reference.cpp",
"cpdf_reference.h",
"cpdf_revision_classifier.cpp",
"cpdf_revision_classifier.h",
"cpdf_revision_diff.cpp",
"cpdf_revision_diff.h",
"cpdf_revision_provider.cpp",
"cpdf_revision_provider.h",
"cpdf_security_handler.cpp",
"cpdf_security_handler.h",
"cpdf_simple_parser.cpp",
Expand Down
7 changes: 6 additions & 1 deletion core/fpdfapi/parser/cpdf_crypto_handler.cpp
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -53,7 +53,12 @@ bool CPDF_CryptoHandler::IsSignatureDictionary(
if (!type_obj) {
type_obj = dictionary->GetDirectObjectFor(pdfium::form_fields::kFT);
}
return type_obj && type_obj->GetString() == pdfium::form_fields::kSig;
if (!type_obj) {
return false;
}

const ByteString type = type_obj->GetString();
return type == pdfium::form_fields::kSig || type == "DocTimeStamp";
}

DataVector<uint8_t> CPDF_CryptoHandler::EncryptContent(
Expand Down
39 changes: 39 additions & 0 deletions core/fpdfapi/parser/cpdf_parser.cpp
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@
#include "core/fpdfapi/parser/cpdf_object_stream.h"
#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_revision_provider.h"
#include "core/fpdfapi/parser/cpdf_security_handler.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
Expand DownExpand Up@@ -468,6 +469,9 @@ bool CPDF_Parser::LoadAllCrossRefTablesAndStreams(FX_FILESIZE xref_offset) {
xref_stream_ = true;
}

revision_xref_list_ = xref_list;
revision_xref_stream_list_ = xref_stream_list;

return true;
}

Expand DownExpand Up@@ -676,6 +680,26 @@ bool CPDF_Parser::LoadCrossRefTable(FX_FILESIZE pos, bool skip) {
return true;
}

bool CPDF_Parser::ExtractCrossRefTableEntriesAt(FX_FILESIZE pos,
ObjectMap* out_objects) {
if (!out_objects)
return false;

const FX_FILESIZE saved_pos = syntax_->GetPos();
syntax_->SetPos(pos);
std::vector<CrossRefObjData> objects;
bool ok = ParseCrossRefTable(&objects);
syntax_->SetPos(saved_pos);

if (!ok)
return false;

for (const auto& obj : objects)
(*out_objects)[obj.obj_num] = obj.info;

return true;
}

void CPDF_Parser::MergeCrossRefObjectsData(
const std::vector<CrossRefObjData>& objects) {
for (const auto& obj : objects) {
Expand DownExpand Up@@ -1392,6 +1416,21 @@ std::vector<unsigned int> CPDF_Parser::GetTrailerEnds() {
return trailer_ends;
}

const CPDF_RevisionProvider* CPDF_Parser::GetRevisionProvider() {
if (!has_parsed_ || revision_xref_list_.empty())
return nullptr;

if (!revision_provider_) {
revision_provider_ = std::make_unique<CPDF_RevisionProvider>();
if (!revision_provider_->Build(this, revision_xref_list_,
revision_xref_stream_list_)) {
revision_provider_.reset();
return nullptr;
}
}
return revision_provider_.get();
}

bool CPDF_Parser::WriteToArchive(IFX_ArchiveStream* archive,
FX_FILESIZE src_size) {
static constexpr FX_FILESIZE kBufferSize = 4096;
Expand Down
17 changes: 17 additions & 0 deletions core/fpdfapi/parser/cpdf_parser.h
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -29,6 +29,7 @@ class CPDF_LinearizedHeader;
class CPDF_Object;
class CPDF_ObjectStream;
class CPDF_ReadValidator;
class CPDF_RevisionProvider;
class CPDF_SecurityHandler;
class CPDF_SyntaxParser;
class IFX_ArchiveStream;
Expand DownExpand Up@@ -119,6 +120,16 @@ class CPDF_Parser {
std::vector<unsigned int> GetTrailerEnds();
bool WriteToArchive(IFX_ArchiveStream* archive, FX_FILESIZE src_size);

using ObjectMap = std::map<uint32_t, CPDF_CrossRefTable::ObjectInfo>;

// Re-parse a classic xref table at |pos| and return entries as an ObjectMap.
// Does not mutate cross_ref_table_ or any other parser state.
bool ExtractCrossRefTableEntriesAt(FX_FILESIZE pos, ObjectMap* out_objects);

// Returns the revision provider, building it lazily on first access.
// Returns nullptr if the parser has not successfully loaded a document.
const CPDF_RevisionProvider* GetRevisionProvider();

const CPDF_CrossRefTable* GetCrossRefTableForTesting() const {
return cross_ref_table_.get();
}
Expand DownExpand Up@@ -211,6 +222,12 @@ class CPDF_Parser {
std::set<uint32_t> parsing_obj_nums_;

RetainPtr<CPDF_SecurityHandler> security_handler_;

// Populated by LoadAllCrossRefTablesAndStreams.
// Index 0 = newest (main) revision. After Build() reversal, index 0 = oldest.
std::vector<FX_FILESIZE> revision_xref_list_;
std::vector<FX_FILESIZE> revision_xref_stream_list_;
std::unique_ptr<CPDF_RevisionProvider> revision_provider_;
};

#endif // CORE_FPDFAPI_PARSER_CPDF_PARSER_H_
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
Embedpdf/feature/digital signature#17

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

bobsingor
wants to merge
7
commits into

base:embedpdf/main
Choose a base branch

from

 Open


Embedpdf/feature/digital signature
#17
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


7 commits


Select commit
Hold shift + click to select a range
fecc517

Preparing for digitial signature


bobsingor Apr 7, 2026
00b52d3

Add raw page-field fix and sig annot handle APIs


bobsingor Apr 9, 2026
9ae6a1c

Cleanup code


bobsingor Apr 12, 2026
4ae31a9

Add revision API


bobsingor Apr 13, 2026
b0be796

Some fixes


bobsingor Apr 14, 2026
699f051

Add CollectAnnotationSupportObjectNumbers


bobsingor Apr 19, 2026
09385a2

Sync branch with main


bobsingor May 7, 2026

File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


6 changes: 6 additions & 0 deletions
constants/annotation_common.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -20,6 +20,12 @@ inline constexpr char kM[] = "M";
inline constexpr char kF[] = "F";
inline constexpr char kAP[] = "AP";
inline constexpr char kAS[] = "AS";
inline constexpr char kA[] = "A";
inline constexpr char kAA[] = "AA";
inline constexpr char kPopup[] = "Popup";
inline constexpr char kBS[] = "BS";
inline constexpr char kBE[] = "BE";
inline constexpr char kMK[] = "MK";
inline constexpr char kBorder[] = "Border";
inline constexpr char kC[] = "C";
inline constexpr char kStructParent[] = "StructParent";
Expand Down

6 changes: 6 additions & 0 deletions
core/fpdfapi/parser/BUILD.gn

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -57,6 +57,12 @@ source_set("parser") {
 "cpdf_read_validator.h",
 "cpdf_reference.cpp",
 "cpdf_reference.h",
 "cpdf_revision_classifier.cpp",
 "cpdf_revision_classifier.h",
 "cpdf_revision_diff.cpp",
 "cpdf_revision_diff.h",
 "cpdf_revision_provider.cpp",
 "cpdf_revision_provider.h",
 "cpdf_security_handler.cpp",
 "cpdf_security_handler.h",
 "cpdf_simple_parser.cpp",
Expand Down

7 changes: 6 additions & 1 deletion
core/fpdfapi/parser/cpdf_crypto_handler.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,7 +53,12 @@ bool CPDF_CryptoHandler::IsSignatureDictionary(
 if (!type_obj) {
 type_obj = dictionary->GetDirectObjectFor(pdfium::form_fields::kFT);
 }
 return type_obj && type_obj->GetString() == pdfium::form_fields::kSig;
 if (!type_obj) {
 return false;
 }

 const ByteString type = type_obj->GetString();
 return type == pdfium::form_fields::kSig || type == "DocTimeStamp";
}

DataVector<uint8_t> CPDF_CryptoHandler::EncryptContent(
Expand Down

39 changes: 39 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@
#include "core/fpdfapi/parser/cpdf_object_stream.h"
#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_revision_provider.h"
#include "core/fpdfapi/parser/cpdf_security_handler.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
Expand DownExpand Up@@ -468,6 +469,9 @@ bool CPDF_Parser::LoadAllCrossRefTablesAndStreams(FX_FILESIZE xref_offset) {
 xref_stream_ = true;
 }

 revision_xref_list_ = xref_list;
 revision_xref_stream_list_ = xref_stream_list;

 return true;
}

Expand DownExpand Up@@ -676,6 +680,26 @@ bool CPDF_Parser::LoadCrossRefTable(FX_FILESIZE pos, bool skip) {
 return true;
}

bool CPDF_Parser::ExtractCrossRefTableEntriesAt(FX_FILESIZE pos,
 ObjectMap* out_objects) {
 if (!out_objects)
 return false;

 const FX_FILESIZE saved_pos = syntax_->GetPos();
 syntax_->SetPos(pos);
 std::vector<CrossRefObjData> objects;
 bool ok = ParseCrossRefTable(&objects);
 syntax_->SetPos(saved_pos);

 if (!ok)
 return false;

 for (const auto& obj : objects)
 (*out_objects)[obj.obj_num] = obj.info;

 return true;
}

void CPDF_Parser::MergeCrossRefObjectsData(
 const std::vector<CrossRefObjData>& objects) {
 for (const auto& obj : objects) {
Expand DownExpand Up@@ -1392,6 +1416,21 @@ std::vector<unsigned int> CPDF_Parser::GetTrailerEnds() {
 return trailer_ends;
}

const CPDF_RevisionProvider* CPDF_Parser::GetRevisionProvider() {
 if (!has_parsed_ || revision_xref_list_.empty())
 return nullptr;

 if (!revision_provider_) {
 revision_provider_ = std::make_unique<CPDF_RevisionProvider>();
 if (!revision_provider_->Build(this, revision_xref_list_,
 revision_xref_stream_list_)) {
 revision_provider_.reset();
 return nullptr;
 }
 }
 return revision_provider_.get();
}

bool CPDF_Parser::WriteToArchive(IFX_ArchiveStream* archive,
 FX_FILESIZE src_size) {
 static constexpr FX_FILESIZE kBufferSize = 4096;
Expand Down

17 changes: 17 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,6 +29,7 @@ class CPDF_LinearizedHeader;
class CPDF_Object;
class CPDF_ObjectStream;
class CPDF_ReadValidator;
class CPDF_RevisionProvider;
class CPDF_SecurityHandler;
class CPDF_SyntaxParser;
class IFX_ArchiveStream;
Expand DownExpand Up@@ -119,6 +120,16 @@ class CPDF_Parser {
 std::vector<unsigned int> GetTrailerEnds();
 bool WriteToArchive(IFX_ArchiveStream* archive, FX_FILESIZE src_size);

 using ObjectMap = std::map<uint32_t, CPDF_CrossRefTable::ObjectInfo>;

 // Re-parse a classic xref table at |pos| and return entries as an ObjectMap.
 // Does not mutate cross_ref_table_ or any other parser state.
 bool ExtractCrossRefTableEntriesAt(FX_FILESIZE pos, ObjectMap* out_objects);

 // Returns the revision provider, building it lazily on first access.
 // Returns nullptr if the parser has not successfully loaded a document.
 const CPDF_RevisionProvider* GetRevisionProvider();

 const CPDF_CrossRefTable* GetCrossRefTableForTesting() const {
 return cross_ref_table_.get();
 }
Expand DownExpand Up@@ -211,6 +222,12 @@ class CPDF_Parser {
 std::set<uint32_t> parsing_obj_nums_;

 RetainPtr<CPDF_SecurityHandler> security_handler_;

 // Populated by LoadAllCrossRefTablesAndStreams.
 // Index 0 = newest (main) revision. After Build() reversal, index 0 = oldest.
 std::vector<FX_FILESIZE> revision_xref_list_;
 std::vector<FX_FILESIZE> revision_xref_stream_list_;
 std::unique_ptr<CPDF_RevisionProvider> revision_provider_;
};

#endif // CORE_FPDFAPI_PARSER_CPDF_PARSER_H_
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Embedpdf/feature/digital signature#17

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

bobsingor
wants to merge
7
commits into

base:embedpdf/main
Choose a base branch

from

 Open


Embedpdf/feature/digital signature
#17
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


7 commits


Select commit
Hold shift + click to select a range
fecc517

Preparing for digitial signature


bobsingor Apr 7, 2026
00b52d3

Add raw page-field fix and sig annot handle APIs


bobsingor Apr 9, 2026
9ae6a1c

Cleanup code


bobsingor Apr 12, 2026
4ae31a9

Add revision API


bobsingor Apr 13, 2026
b0be796

Some fixes


bobsingor Apr 14, 2026
699f051

Add CollectAnnotationSupportObjectNumbers


bobsingor Apr 19, 2026
09385a2

Sync branch with main


bobsingor May 7, 2026

File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


6 changes: 6 additions & 0 deletions
constants/annotation_common.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -20,6 +20,12 @@ inline constexpr char kM[] = "M";
inline constexpr char kF[] = "F";
inline constexpr char kAP[] = "AP";
inline constexpr char kAS[] = "AS";
inline constexpr char kA[] = "A";
inline constexpr char kAA[] = "AA";
inline constexpr char kPopup[] = "Popup";
inline constexpr char kBS[] = "BS";
inline constexpr char kBE[] = "BE";
inline constexpr char kMK[] = "MK";
inline constexpr char kBorder[] = "Border";
inline constexpr char kC[] = "C";
inline constexpr char kStructParent[] = "StructParent";
Expand Down

6 changes: 6 additions & 0 deletions
core/fpdfapi/parser/BUILD.gn

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -57,6 +57,12 @@ source_set("parser") {
 "cpdf_read_validator.h",
 "cpdf_reference.cpp",
 "cpdf_reference.h",
 "cpdf_revision_classifier.cpp",
 "cpdf_revision_classifier.h",
 "cpdf_revision_diff.cpp",
 "cpdf_revision_diff.h",
 "cpdf_revision_provider.cpp",
 "cpdf_revision_provider.h",
 "cpdf_security_handler.cpp",
 "cpdf_security_handler.h",
 "cpdf_simple_parser.cpp",
Expand Down

7 changes: 6 additions & 1 deletion
core/fpdfapi/parser/cpdf_crypto_handler.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,7 +53,12 @@ bool CPDF_CryptoHandler::IsSignatureDictionary(
 if (!type_obj) {
 type_obj = dictionary->GetDirectObjectFor(pdfium::form_fields::kFT);
 }
 return type_obj && type_obj->GetString() == pdfium::form_fields::kSig;
 if (!type_obj) {
 return false;
 }

 const ByteString type = type_obj->GetString();
 return type == pdfium::form_fields::kSig || type == "DocTimeStamp";
}

DataVector<uint8_t> CPDF_CryptoHandler::EncryptContent(
Expand Down

39 changes: 39 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@
#include "core/fpdfapi/parser/cpdf_object_stream.h"
#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_revision_provider.h"
#include "core/fpdfapi/parser/cpdf_security_handler.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
Expand DownExpand Up@@ -468,6 +469,9 @@ bool CPDF_Parser::LoadAllCrossRefTablesAndStreams(FX_FILESIZE xref_offset) {
 xref_stream_ = true;
 }

 revision_xref_list_ = xref_list;
 revision_xref_stream_list_ = xref_stream_list;

 return true;
}

Expand DownExpand Up@@ -676,6 +680,26 @@ bool CPDF_Parser::LoadCrossRefTable(FX_FILESIZE pos, bool skip) {
 return true;
}

bool CPDF_Parser::ExtractCrossRefTableEntriesAt(FX_FILESIZE pos,
 ObjectMap* out_objects) {
 if (!out_objects)
 return false;

 const FX_FILESIZE saved_pos = syntax_->GetPos();
 syntax_->SetPos(pos);
 std::vector<CrossRefObjData> objects;
 bool ok = ParseCrossRefTable(&objects);
 syntax_->SetPos(saved_pos);

 if (!ok)
 return false;

 for (const auto& obj : objects)
 (*out_objects)[obj.obj_num] = obj.info;

 return true;
}

void CPDF_Parser::MergeCrossRefObjectsData(
 const std::vector<CrossRefObjData>& objects) {
 for (const auto& obj : objects) {
Expand DownExpand Up@@ -1392,6 +1416,21 @@ std::vector<unsigned int> CPDF_Parser::GetTrailerEnds() {
 return trailer_ends;
}

const CPDF_RevisionProvider* CPDF_Parser::GetRevisionProvider() {
 if (!has_parsed_ || revision_xref_list_.empty())
 return nullptr;

 if (!revision_provider_) {
 revision_provider_ = std::make_unique<CPDF_RevisionProvider>();
 if (!revision_provider_->Build(this, revision_xref_list_,
 revision_xref_stream_list_)) {
 revision_provider_.reset();
 return nullptr;
 }
 }
 return revision_provider_.get();
}

bool CPDF_Parser::WriteToArchive(IFX_ArchiveStream* archive,
 FX_FILESIZE src_size) {
 static constexpr FX_FILESIZE kBufferSize = 4096;
Expand Down

17 changes: 17 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,6 +29,7 @@ class CPDF_LinearizedHeader;
class CPDF_Object;
class CPDF_ObjectStream;
class CPDF_ReadValidator;
class CPDF_RevisionProvider;
class CPDF_SecurityHandler;
class CPDF_SyntaxParser;
class IFX_ArchiveStream;
Expand DownExpand Up@@ -119,6 +120,16 @@ class CPDF_Parser {
 std::vector<unsigned int> GetTrailerEnds();
 bool WriteToArchive(IFX_ArchiveStream* archive, FX_FILESIZE src_size);

 using ObjectMap = std::map<uint32_t, CPDF_CrossRefTable::ObjectInfo>;

 // Re-parse a classic xref table at |pos| and return entries as an ObjectMap.
 // Does not mutate cross_ref_table_ or any other parser state.
 bool ExtractCrossRefTableEntriesAt(FX_FILESIZE pos, ObjectMap* out_objects);

 // Returns the revision provider, building it lazily on first access.
 // Returns nullptr if the parser has not successfully loaded a document.
 const CPDF_RevisionProvider* GetRevisionProvider();

 const CPDF_CrossRefTable* GetCrossRefTableForTesting() const {
 return cross_ref_table_.get();
 }
Expand DownExpand Up@@ -211,6 +222,12 @@ class CPDF_Parser {
 std::set<uint32_t> parsing_obj_nums_;

 RetainPtr<CPDF_SecurityHandler> security_handler_;

 // Populated by LoadAllCrossRefTablesAndStreams.
 // Index 0 = newest (main) revision. After Build() reversal, index 0 = oldest.
 std::vector<FX_FILESIZE> revision_xref_list_;
 std::vector<FX_FILESIZE> revision_xref_stream_list_;
 std::unique_ptr<CPDF_RevisionProvider> revision_provider_;
};

#endif // CORE_FPDFAPI_PARSER_CPDF_PARSER_H_
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Embedpdf/feature/digital signature#17

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

bobsingor
wants to merge
7
commits into

base:embedpdf/main
Choose a base branch

from

 Open


Embedpdf/feature/digital signature
#17
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


7 commits


Select commit
Hold shift + click to select a range
fecc517

Preparing for digitial signature


bobsingor Apr 7, 2026
00b52d3

Add raw page-field fix and sig annot handle APIs


bobsingor Apr 9, 2026
9ae6a1c

Cleanup code


bobsingor Apr 12, 2026
4ae31a9

Add revision API


bobsingor Apr 13, 2026
b0be796

Some fixes


bobsingor Apr 14, 2026
699f051

Add CollectAnnotationSupportObjectNumbers


bobsingor Apr 19, 2026
09385a2

Sync branch with main


bobsingor May 7, 2026

File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


6 changes: 6 additions & 0 deletions
constants/annotation_common.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -20,6 +20,12 @@ inline constexpr char kM[] = "M";
inline constexpr char kF[] = "F";
inline constexpr char kAP[] = "AP";
inline constexpr char kAS[] = "AS";
inline constexpr char kA[] = "A";
inline constexpr char kAA[] = "AA";
inline constexpr char kPopup[] = "Popup";
inline constexpr char kBS[] = "BS";
inline constexpr char kBE[] = "BE";
inline constexpr char kMK[] = "MK";
inline constexpr char kBorder[] = "Border";
inline constexpr char kC[] = "C";
inline constexpr char kStructParent[] = "StructParent";
Expand Down

6 changes: 6 additions & 0 deletions
core/fpdfapi/parser/BUILD.gn

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -57,6 +57,12 @@ source_set("parser") {
 "cpdf_read_validator.h",
 "cpdf_reference.cpp",
 "cpdf_reference.h",
 "cpdf_revision_classifier.cpp",
 "cpdf_revision_classifier.h",
 "cpdf_revision_diff.cpp",
 "cpdf_revision_diff.h",
 "cpdf_revision_provider.cpp",
 "cpdf_revision_provider.h",
 "cpdf_security_handler.cpp",
 "cpdf_security_handler.h",
 "cpdf_simple_parser.cpp",
Expand Down

7 changes: 6 additions & 1 deletion
core/fpdfapi/parser/cpdf_crypto_handler.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,7 +53,12 @@ bool CPDF_CryptoHandler::IsSignatureDictionary(
 if (!type_obj) {
 type_obj = dictionary->GetDirectObjectFor(pdfium::form_fields::kFT);
 }
 return type_obj && type_obj->GetString() == pdfium::form_fields::kSig;
 if (!type_obj) {
 return false;
 }

 const ByteString type = type_obj->GetString();
 return type == pdfium::form_fields::kSig || type == "DocTimeStamp";
}

DataVector<uint8_t> CPDF_CryptoHandler::EncryptContent(
Expand Down

39 changes: 39 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@
#include "core/fpdfapi/parser/cpdf_object_stream.h"
#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_revision_provider.h"
#include "core/fpdfapi/parser/cpdf_security_handler.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
Expand DownExpand Up@@ -468,6 +469,9 @@ bool CPDF_Parser::LoadAllCrossRefTablesAndStreams(FX_FILESIZE xref_offset) {
 xref_stream_ = true;
 }

 revision_xref_list_ = xref_list;
 revision_xref_stream_list_ = xref_stream_list;

 return true;
}

Expand DownExpand Up@@ -676,6 +680,26 @@ bool CPDF_Parser::LoadCrossRefTable(FX_FILESIZE pos, bool skip) {
 return true;
}

bool CPDF_Parser::ExtractCrossRefTableEntriesAt(FX_FILESIZE pos,
 ObjectMap* out_objects) {
 if (!out_objects)
 return false;

 const FX_FILESIZE saved_pos = syntax_->GetPos();
 syntax_->SetPos(pos);
 std::vector<CrossRefObjData> objects;
 bool ok = ParseCrossRefTable(&objects);
 syntax_->SetPos(saved_pos);

 if (!ok)
 return false;

 for (const auto& obj : objects)
 (*out_objects)[obj.obj_num] = obj.info;

 return true;
}

void CPDF_Parser::MergeCrossRefObjectsData(
 const std::vector<CrossRefObjData>& objects) {
 for (const auto& obj : objects) {
Expand DownExpand Up@@ -1392,6 +1416,21 @@ std::vector<unsigned int> CPDF_Parser::GetTrailerEnds() {
 return trailer_ends;
}

const CPDF_RevisionProvider* CPDF_Parser::GetRevisionProvider() {
 if (!has_parsed_ || revision_xref_list_.empty())
 return nullptr;

 if (!revision_provider_) {
 revision_provider_ = std::make_unique<CPDF_RevisionProvider>();
 if (!revision_provider_->Build(this, revision_xref_list_,
 revision_xref_stream_list_)) {
 revision_provider_.reset();
 return nullptr;
 }
 }
 return revision_provider_.get();
}

bool CPDF_Parser::WriteToArchive(IFX_ArchiveStream* archive,
 FX_FILESIZE src_size) {
 static constexpr FX_FILESIZE kBufferSize = 4096;
Expand Down

17 changes: 17 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,6 +29,7 @@ class CPDF_LinearizedHeader;
class CPDF_Object;
class CPDF_ObjectStream;
class CPDF_ReadValidator;
class CPDF_RevisionProvider;
class CPDF_SecurityHandler;
class CPDF_SyntaxParser;
class IFX_ArchiveStream;
Expand DownExpand Up@@ -119,6 +120,16 @@ class CPDF_Parser {
 std::vector<unsigned int> GetTrailerEnds();
 bool WriteToArchive(IFX_ArchiveStream* archive, FX_FILESIZE src_size);

 using ObjectMap = std::map<uint32_t, CPDF_CrossRefTable::ObjectInfo>;

 // Re-parse a classic xref table at |pos| and return entries as an ObjectMap.
 // Does not mutate cross_ref_table_ or any other parser state.
 bool ExtractCrossRefTableEntriesAt(FX_FILESIZE pos, ObjectMap* out_objects);

 // Returns the revision provider, building it lazily on first access.
 // Returns nullptr if the parser has not successfully loaded a document.
 const CPDF_RevisionProvider* GetRevisionProvider();

 const CPDF_CrossRefTable* GetCrossRefTableForTesting() const {
 return cross_ref_table_.get();
 }
Expand DownExpand Up@@ -211,6 +222,12 @@ class CPDF_Parser {
 std::set<uint32_t> parsing_obj_nums_;

 RetainPtr<CPDF_SecurityHandler> security_handler_;

 // Populated by LoadAllCrossRefTablesAndStreams.
 // Index 0 = newest (main) revision. After Build() reversal, index 0 = oldest.
 std::vector<FX_FILESIZE> revision_xref_list_;
 std::vector<FX_FILESIZE> revision_xref_stream_list_;
 std::unique_ptr<CPDF_RevisionProvider> revision_provider_;
};

#endif // CORE_FPDFAPI_PARSER_CPDF_PARSER_H_
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
Embedpdf/feature/digital signature#17

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

bobsingor
wants to merge
7
commits into

base:embedpdf/main
Choose a base branch

from

 Open


Embedpdf/feature/digital signature
#17
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


7 commits


Select commit
Hold shift + click to select a range
fecc517

Preparing for digitial signature


bobsingor Apr 7, 2026
00b52d3

Add raw page-field fix and sig annot handle APIs


bobsingor Apr 9, 2026
9ae6a1c

Cleanup code


bobsingor Apr 12, 2026
4ae31a9

Add revision API


bobsingor Apr 13, 2026
b0be796

Some fixes


bobsingor Apr 14, 2026
699f051

Add CollectAnnotationSupportObjectNumbers


bobsingor Apr 19, 2026
09385a2

Sync branch with main


bobsingor May 7, 2026

File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


6 changes: 6 additions & 0 deletions
constants/annotation_common.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -20,6 +20,12 @@ inline constexpr char kM[] = "M";
inline constexpr char kF[] = "F";
inline constexpr char kAP[] = "AP";
inline constexpr char kAS[] = "AS";
inline constexpr char kA[] = "A";
inline constexpr char kAA[] = "AA";
inline constexpr char kPopup[] = "Popup";
inline constexpr char kBS[] = "BS";
inline constexpr char kBE[] = "BE";
inline constexpr char kMK[] = "MK";
inline constexpr char kBorder[] = "Border";
inline constexpr char kC[] = "C";
inline constexpr char kStructParent[] = "StructParent";
Expand Down

6 changes: 6 additions & 0 deletions
core/fpdfapi/parser/BUILD.gn

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -57,6 +57,12 @@ source_set("parser") {
 "cpdf_read_validator.h",
 "cpdf_reference.cpp",
 "cpdf_reference.h",
 "cpdf_revision_classifier.cpp",
 "cpdf_revision_classifier.h",
 "cpdf_revision_diff.cpp",
 "cpdf_revision_diff.h",
 "cpdf_revision_provider.cpp",
 "cpdf_revision_provider.h",
 "cpdf_security_handler.cpp",
 "cpdf_security_handler.h",
 "cpdf_simple_parser.cpp",
Expand Down

7 changes: 6 additions & 1 deletion
core/fpdfapi/parser/cpdf_crypto_handler.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,7 +53,12 @@ bool CPDF_CryptoHandler::IsSignatureDictionary(
 if (!type_obj) {
 type_obj = dictionary->GetDirectObjectFor(pdfium::form_fields::kFT);
 }
 return type_obj && type_obj->GetString() == pdfium::form_fields::kSig;
 if (!type_obj) {
 return false;
 }

 const ByteString type = type_obj->GetString();
 return type == pdfium::form_fields::kSig || type == "DocTimeStamp";
}

DataVector<uint8_t> CPDF_CryptoHandler::EncryptContent(
Expand Down

39 changes: 39 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@
#include "core/fpdfapi/parser/cpdf_object_stream.h"
#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_revision_provider.h"
#include "core/fpdfapi/parser/cpdf_security_handler.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
Expand DownExpand Up@@ -468,6 +469,9 @@ bool CPDF_Parser::LoadAllCrossRefTablesAndStreams(FX_FILESIZE xref_offset) {
 xref_stream_ = true;
 }

 revision_xref_list_ = xref_list;
 revision_xref_stream_list_ = xref_stream_list;

 return true;
}

Expand DownExpand Up@@ -676,6 +680,26 @@ bool CPDF_Parser::LoadCrossRefTable(FX_FILESIZE pos, bool skip) {
 return true;
}

bool CPDF_Parser::ExtractCrossRefTableEntriesAt(FX_FILESIZE pos,
 ObjectMap* out_objects) {
 if (!out_objects)
 return false;

 const FX_FILESIZE saved_pos = syntax_->GetPos();
 syntax_->SetPos(pos);
 std::vector<CrossRefObjData> objects;
 bool ok = ParseCrossRefTable(&objects);
 syntax_->SetPos(saved_pos);

 if (!ok)
 return false;

 for (const auto& obj : objects)
 (*out_objects)[obj.obj_num] = obj.info;

 return true;
}

void CPDF_Parser::MergeCrossRefObjectsData(
 const std::vector<CrossRefObjData>& objects) {
 for (const auto& obj : objects) {
Expand DownExpand Up@@ -1392,6 +1416,21 @@ std::vector<unsigned int> CPDF_Parser::GetTrailerEnds() {
 return trailer_ends;
}

const CPDF_RevisionProvider* CPDF_Parser::GetRevisionProvider() {
 if (!has_parsed_ || revision_xref_list_.empty())
 return nullptr;

 if (!revision_provider_) {
 revision_provider_ = std::make_unique<CPDF_RevisionProvider>();
 if (!revision_provider_->Build(this, revision_xref_list_,
 revision_xref_stream_list_)) {
 revision_provider_.reset();
 return nullptr;
 }
 }
 return revision_provider_.get();
}

bool CPDF_Parser::WriteToArchive(IFX_ArchiveStream* archive,
 FX_FILESIZE src_size) {
 static constexpr FX_FILESIZE kBufferSize = 4096;
Expand Down

17 changes: 17 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,6 +29,7 @@ class CPDF_LinearizedHeader;
class CPDF_Object;
class CPDF_ObjectStream;
class CPDF_ReadValidator;
class CPDF_RevisionProvider;
class CPDF_SecurityHandler;
class CPDF_SyntaxParser;
class IFX_ArchiveStream;
Expand DownExpand Up@@ -119,6 +120,16 @@ class CPDF_Parser {
 std::vector<unsigned int> GetTrailerEnds();
 bool WriteToArchive(IFX_ArchiveStream* archive, FX_FILESIZE src_size);

 using ObjectMap = std::map<uint32_t, CPDF_CrossRefTable::ObjectInfo>;

 // Re-parse a classic xref table at |pos| and return entries as an ObjectMap.
 // Does not mutate cross_ref_table_ or any other parser state.
 bool ExtractCrossRefTableEntriesAt(FX_FILESIZE pos, ObjectMap* out_objects);

 // Returns the revision provider, building it lazily on first access.
 // Returns nullptr if the parser has not successfully loaded a document.
 const CPDF_RevisionProvider* GetRevisionProvider();

 const CPDF_CrossRefTable* GetCrossRefTableForTesting() const {
 return cross_ref_table_.get();
 }
Expand DownExpand Up@@ -211,6 +222,12 @@ class CPDF_Parser {
 std::set<uint32_t> parsing_obj_nums_;

 RetainPtr<CPDF_SecurityHandler> security_handler_;

 // Populated by LoadAllCrossRefTablesAndStreams.
 // Index 0 = newest (main) revision. After Build() reversal, index 0 = oldest.
 std::vector<FX_FILESIZE> revision_xref_list_;
 std::vector<FX_FILESIZE> revision_xref_stream_list_;
 std::unique_ptr<CPDF_RevisionProvider> revision_provider_;
};

#endif // CORE_FPDFAPI_PARSER_CPDF_PARSER_H_
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Embedpdf/feature/digital signature#17

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

bobsingor
wants to merge
7
commits into

base:embedpdf/main
Choose a base branch

from

 Open


Embedpdf/feature/digital signature
#17
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


7 commits


Select commit
Hold shift + click to select a range
fecc517

Preparing for digitial signature


bobsingor Apr 7, 2026
00b52d3

Add raw page-field fix and sig annot handle APIs


bobsingor Apr 9, 2026
9ae6a1c

Cleanup code


bobsingor Apr 12, 2026
4ae31a9

Add revision API


bobsingor Apr 13, 2026
b0be796

Some fixes


bobsingor Apr 14, 2026
699f051

Add CollectAnnotationSupportObjectNumbers


bobsingor Apr 19, 2026
09385a2

Sync branch with main


bobsingor May 7, 2026

File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


6 changes: 6 additions & 0 deletions
constants/annotation_common.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -20,6 +20,12 @@ inline constexpr char kM[] = "M";
inline constexpr char kF[] = "F";
inline constexpr char kAP[] = "AP";
inline constexpr char kAS[] = "AS";
inline constexpr char kA[] = "A";
inline constexpr char kAA[] = "AA";
inline constexpr char kPopup[] = "Popup";
inline constexpr char kBS[] = "BS";
inline constexpr char kBE[] = "BE";
inline constexpr char kMK[] = "MK";
inline constexpr char kBorder[] = "Border";
inline constexpr char kC[] = "C";
inline constexpr char kStructParent[] = "StructParent";
Expand Down

6 changes: 6 additions & 0 deletions
core/fpdfapi/parser/BUILD.gn

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -57,6 +57,12 @@ source_set("parser") {
 "cpdf_read_validator.h",
 "cpdf_reference.cpp",
 "cpdf_reference.h",
 "cpdf_revision_classifier.cpp",
 "cpdf_revision_classifier.h",
 "cpdf_revision_diff.cpp",
 "cpdf_revision_diff.h",
 "cpdf_revision_provider.cpp",
 "cpdf_revision_provider.h",
 "cpdf_security_handler.cpp",
 "cpdf_security_handler.h",
 "cpdf_simple_parser.cpp",
Expand Down

7 changes: 6 additions & 1 deletion
core/fpdfapi/parser/cpdf_crypto_handler.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,7 +53,12 @@ bool CPDF_CryptoHandler::IsSignatureDictionary(
 if (!type_obj) {
 type_obj = dictionary->GetDirectObjectFor(pdfium::form_fields::kFT);
 }
 return type_obj && type_obj->GetString() == pdfium::form_fields::kSig;
 if (!type_obj) {
 return false;
 }

 const ByteString type = type_obj->GetString();
 return type == pdfium::form_fields::kSig || type == "DocTimeStamp";
}

DataVector<uint8_t> CPDF_CryptoHandler::EncryptContent(
Expand Down

39 changes: 39 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@
#include "core/fpdfapi/parser/cpdf_object_stream.h"
#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_revision_provider.h"
#include "core/fpdfapi/parser/cpdf_security_handler.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
Expand DownExpand Up@@ -468,6 +469,9 @@ bool CPDF_Parser::LoadAllCrossRefTablesAndStreams(FX_FILESIZE xref_offset) {
 xref_stream_ = true;
 }

 revision_xref_list_ = xref_list;
 revision_xref_stream_list_ = xref_stream_list;

 return true;
}

Expand DownExpand Up@@ -676,6 +680,26 @@ bool CPDF_Parser::LoadCrossRefTable(FX_FILESIZE pos, bool skip) {
 return true;
}

bool CPDF_Parser::ExtractCrossRefTableEntriesAt(FX_FILESIZE pos,
 ObjectMap* out_objects) {
 if (!out_objects)
 return false;

 const FX_FILESIZE saved_pos = syntax_->GetPos();
 syntax_->SetPos(pos);
 std::vector<CrossRefObjData> objects;
 bool ok = ParseCrossRefTable(&objects);
 syntax_->SetPos(saved_pos);

 if (!ok)
 return false;

 for (const auto& obj : objects)
 (*out_objects)[obj.obj_num] = obj.info;

 return true;
}

void CPDF_Parser::MergeCrossRefObjectsData(
 const std::vector<CrossRefObjData>& objects) {
 for (const auto& obj : objects) {
Expand DownExpand Up@@ -1392,6 +1416,21 @@ std::vector<unsigned int> CPDF_Parser::GetTrailerEnds() {
 return trailer_ends;
}

const CPDF_RevisionProvider* CPDF_Parser::GetRevisionProvider() {
 if (!has_parsed_ || revision_xref_list_.empty())
 return nullptr;

 if (!revision_provider_) {
 revision_provider_ = std::make_unique<CPDF_RevisionProvider>();
 if (!revision_provider_->Build(this, revision_xref_list_,
 revision_xref_stream_list_)) {
 revision_provider_.reset();
 return nullptr;
 }
 }
 return revision_provider_.get();
}

bool CPDF_Parser::WriteToArchive(IFX_ArchiveStream* archive,
 FX_FILESIZE src_size) {
 static constexpr FX_FILESIZE kBufferSize = 4096;
Expand Down

17 changes: 17 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,6 +29,7 @@ class CPDF_LinearizedHeader;
class CPDF_Object;
class CPDF_ObjectStream;
class CPDF_ReadValidator;
class CPDF_RevisionProvider;
class CPDF_SecurityHandler;
class CPDF_SyntaxParser;
class IFX_ArchiveStream;
Expand DownExpand Up@@ -119,6 +120,16 @@ class CPDF_Parser {
 std::vector<unsigned int> GetTrailerEnds();
 bool WriteToArchive(IFX_ArchiveStream* archive, FX_FILESIZE src_size);

 using ObjectMap = std::map<uint32_t, CPDF_CrossRefTable::ObjectInfo>;

 // Re-parse a classic xref table at |pos| and return entries as an ObjectMap.
 // Does not mutate cross_ref_table_ or any other parser state.
 bool ExtractCrossRefTableEntriesAt(FX_FILESIZE pos, ObjectMap* out_objects);

 // Returns the revision provider, building it lazily on first access.
 // Returns nullptr if the parser has not successfully loaded a document.
 const CPDF_RevisionProvider* GetRevisionProvider();

 const CPDF_CrossRefTable* GetCrossRefTableForTesting() const {
 return cross_ref_table_.get();
 }
Expand DownExpand Up@@ -211,6 +222,12 @@ class CPDF_Parser {
 std::set<uint32_t> parsing_obj_nums_;

 RetainPtr<CPDF_SecurityHandler> security_handler_;

 // Populated by LoadAllCrossRefTablesAndStreams.
 // Index 0 = newest (main) revision. After Build() reversal, index 0 = oldest.
 std::vector<FX_FILESIZE> revision_xref_list_;
 std::vector<FX_FILESIZE> revision_xref_stream_list_;
 std::unique_ptr<CPDF_RevisionProvider> revision_provider_;
};

#endif // CORE_FPDFAPI_PARSER_CPDF_PARSER_H_
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Embedpdf/feature/digital signature#17

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

bobsingor
wants to merge
7
commits into

base:embedpdf/main
Choose a base branch

from

 Open


Embedpdf/feature/digital signature
#17
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


7 commits


Select commit
Hold shift + click to select a range
fecc517

Preparing for digitial signature


bobsingor Apr 7, 2026
00b52d3

Add raw page-field fix and sig annot handle APIs


bobsingor Apr 9, 2026
9ae6a1c

Cleanup code


bobsingor Apr 12, 2026
4ae31a9

Add revision API


bobsingor Apr 13, 2026
b0be796

Some fixes


bobsingor Apr 14, 2026
699f051

Add CollectAnnotationSupportObjectNumbers


bobsingor Apr 19, 2026
09385a2

Sync branch with main


bobsingor May 7, 2026

File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


6 changes: 6 additions & 0 deletions
constants/annotation_common.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -20,6 +20,12 @@ inline constexpr char kM[] = "M";
inline constexpr char kF[] = "F";
inline constexpr char kAP[] = "AP";
inline constexpr char kAS[] = "AS";
inline constexpr char kA[] = "A";
inline constexpr char kAA[] = "AA";
inline constexpr char kPopup[] = "Popup";
inline constexpr char kBS[] = "BS";
inline constexpr char kBE[] = "BE";
inline constexpr char kMK[] = "MK";
inline constexpr char kBorder[] = "Border";
inline constexpr char kC[] = "C";
inline constexpr char kStructParent[] = "StructParent";
Expand Down

6 changes: 6 additions & 0 deletions
core/fpdfapi/parser/BUILD.gn

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -57,6 +57,12 @@ source_set("parser") {
 "cpdf_read_validator.h",
 "cpdf_reference.cpp",
 "cpdf_reference.h",
 "cpdf_revision_classifier.cpp",
 "cpdf_revision_classifier.h",
 "cpdf_revision_diff.cpp",
 "cpdf_revision_diff.h",
 "cpdf_revision_provider.cpp",
 "cpdf_revision_provider.h",
 "cpdf_security_handler.cpp",
 "cpdf_security_handler.h",
 "cpdf_simple_parser.cpp",
Expand Down

7 changes: 6 additions & 1 deletion
core/fpdfapi/parser/cpdf_crypto_handler.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,7 +53,12 @@ bool CPDF_CryptoHandler::IsSignatureDictionary(
 if (!type_obj) {
 type_obj = dictionary->GetDirectObjectFor(pdfium::form_fields::kFT);
 }
 return type_obj && type_obj->GetString() == pdfium::form_fields::kSig;
 if (!type_obj) {
 return false;
 }

 const ByteString type = type_obj->GetString();
 return type == pdfium::form_fields::kSig || type == "DocTimeStamp";
}

DataVector<uint8_t> CPDF_CryptoHandler::EncryptContent(
Expand Down

39 changes: 39 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@
#include "core/fpdfapi/parser/cpdf_object_stream.h"
#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_revision_provider.h"
#include "core/fpdfapi/parser/cpdf_security_handler.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
Expand DownExpand Up@@ -468,6 +469,9 @@ bool CPDF_Parser::LoadAllCrossRefTablesAndStreams(FX_FILESIZE xref_offset) {
 xref_stream_ = true;
 }

 revision_xref_list_ = xref_list;
 revision_xref_stream_list_ = xref_stream_list;

 return true;
}

Expand DownExpand Up@@ -676,6 +680,26 @@ bool CPDF_Parser::LoadCrossRefTable(FX_FILESIZE pos, bool skip) {
 return true;
}

bool CPDF_Parser::ExtractCrossRefTableEntriesAt(FX_FILESIZE pos,
 ObjectMap* out_objects) {
 if (!out_objects)
 return false;

 const FX_FILESIZE saved_pos = syntax_->GetPos();
 syntax_->SetPos(pos);
 std::vector<CrossRefObjData> objects;
 bool ok = ParseCrossRefTable(&objects);
 syntax_->SetPos(saved_pos);

 if (!ok)
 return false;

 for (const auto& obj : objects)
 (*out_objects)[obj.obj_num] = obj.info;

 return true;
}

void CPDF_Parser::MergeCrossRefObjectsData(
 const std::vector<CrossRefObjData>& objects) {
 for (const auto& obj : objects) {
Expand DownExpand Up@@ -1392,6 +1416,21 @@ std::vector<unsigned int> CPDF_Parser::GetTrailerEnds() {
 return trailer_ends;
}

const CPDF_RevisionProvider* CPDF_Parser::GetRevisionProvider() {
 if (!has_parsed_ || revision_xref_list_.empty())
 return nullptr;

 if (!revision_provider_) {
 revision_provider_ = std::make_unique<CPDF_RevisionProvider>();
 if (!revision_provider_->Build(this, revision_xref_list_,
 revision_xref_stream_list_)) {
 revision_provider_.reset();
 return nullptr;
 }
 }
 return revision_provider_.get();
}

bool CPDF_Parser::WriteToArchive(IFX_ArchiveStream* archive,
 FX_FILESIZE src_size) {
 static constexpr FX_FILESIZE kBufferSize = 4096;
Expand Down

17 changes: 17 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,6 +29,7 @@ class CPDF_LinearizedHeader;
class CPDF_Object;
class CPDF_ObjectStream;
class CPDF_ReadValidator;
class CPDF_RevisionProvider;
class CPDF_SecurityHandler;
class CPDF_SyntaxParser;
class IFX_ArchiveStream;
Expand DownExpand Up@@ -119,6 +120,16 @@ class CPDF_Parser {
 std::vector<unsigned int> GetTrailerEnds();
 bool WriteToArchive(IFX_ArchiveStream* archive, FX_FILESIZE src_size);

 using ObjectMap = std::map<uint32_t, CPDF_CrossRefTable::ObjectInfo>;

 // Re-parse a classic xref table at |pos| and return entries as an ObjectMap.
 // Does not mutate cross_ref_table_ or any other parser state.
 bool ExtractCrossRefTableEntriesAt(FX_FILESIZE pos, ObjectMap* out_objects);

 // Returns the revision provider, building it lazily on first access.
 // Returns nullptr if the parser has not successfully loaded a document.
 const CPDF_RevisionProvider* GetRevisionProvider();

 const CPDF_CrossRefTable* GetCrossRefTableForTesting() const {
 return cross_ref_table_.get();
 }
Expand DownExpand Up@@ -211,6 +222,12 @@ class CPDF_Parser {
 std::set<uint32_t> parsing_obj_nums_;

 RetainPtr<CPDF_SecurityHandler> security_handler_;

 // Populated by LoadAllCrossRefTablesAndStreams.
 // Index 0 = newest (main) revision. After Build() reversal, index 0 = oldest.
 std::vector<FX_FILESIZE> revision_xref_list_;
 std::vector<FX_FILESIZE> revision_xref_stream_list_;
 std::unique_ptr<CPDF_RevisionProvider> revision_provider_;
};

#endif // CORE_FPDFAPI_PARSER_CPDF_PARSER_H_
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
Embedpdf/feature/digital signature#17

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

 Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and
privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
Sign in
to your account

 Open

bobsingor
wants to merge
7
commits into

base:embedpdf/main
Choose a base branch

from

 Open


Embedpdf/feature/digital signature
#17
Show file tree
Hide file tree
 Changes from all commits
Commits

Show all changes


7 commits


Select commit
Hold shift + click to select a range
fecc517

Preparing for digitial signature


bobsingor Apr 7, 2026
00b52d3

Add raw page-field fix and sig annot handle APIs


bobsingor Apr 9, 2026
9ae6a1c

Cleanup code


bobsingor Apr 12, 2026
4ae31a9

Add revision API


bobsingor Apr 13, 2026
b0be796

Some fixes


bobsingor Apr 14, 2026
699f051

Add CollectAnnotationSupportObjectNumbers


bobsingor Apr 19, 2026
09385a2

Sync branch with main


bobsingor May 7, 2026

File filter

Filter by extension
Filter by extension
Conversations

Failed to load comments. 
Loading
Jump to

Jump to file


Failed to load files. 
Loading
 Diff view

 Diff view


6 changes: 6 additions & 0 deletions
constants/annotation_common.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -20,6 +20,12 @@ inline constexpr char kM[] = "M";
inline constexpr char kF[] = "F";
inline constexpr char kAP[] = "AP";
inline constexpr char kAS[] = "AS";
inline constexpr char kA[] = "A";
inline constexpr char kAA[] = "AA";
inline constexpr char kPopup[] = "Popup";
inline constexpr char kBS[] = "BS";
inline constexpr char kBE[] = "BE";
inline constexpr char kMK[] = "MK";
inline constexpr char kBorder[] = "Border";
inline constexpr char kC[] = "C";
inline constexpr char kStructParent[] = "StructParent";
Expand Down

6 changes: 6 additions & 0 deletions
core/fpdfapi/parser/BUILD.gn

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -57,6 +57,12 @@ source_set("parser") {
 "cpdf_read_validator.h",
 "cpdf_reference.cpp",
 "cpdf_reference.h",
 "cpdf_revision_classifier.cpp",
 "cpdf_revision_classifier.h",
 "cpdf_revision_diff.cpp",
 "cpdf_revision_diff.h",
 "cpdf_revision_provider.cpp",
 "cpdf_revision_provider.h",
 "cpdf_security_handler.cpp",
 "cpdf_security_handler.h",
 "cpdf_simple_parser.cpp",
Expand Down

7 changes: 6 additions & 1 deletion
core/fpdfapi/parser/cpdf_crypto_handler.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -53,7 +53,12 @@ bool CPDF_CryptoHandler::IsSignatureDictionary(
 if (!type_obj) {
 type_obj = dictionary->GetDirectObjectFor(pdfium::form_fields::kFT);
 }
 return type_obj && type_obj->GetString() == pdfium::form_fields::kSig;
 if (!type_obj) {
 return false;
 }

 const ByteString type = type_obj->GetString();
 return type == pdfium::form_fields::kSig || type == "DocTimeStamp";
}

DataVector<uint8_t> CPDF_CryptoHandler::EncryptContent(
Expand Down

39 changes: 39 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.cpp

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -22,6 +22,7 @@
#include "core/fpdfapi/parser/cpdf_object_stream.h"
#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_revision_provider.h"
#include "core/fpdfapi/parser/cpdf_security_handler.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
Expand DownExpand Up@@ -468,6 +469,9 @@ bool CPDF_Parser::LoadAllCrossRefTablesAndStreams(FX_FILESIZE xref_offset) {
 xref_stream_ = true;
 }

 revision_xref_list_ = xref_list;
 revision_xref_stream_list_ = xref_stream_list;

 return true;
}

Expand DownExpand Up@@ -676,6 +680,26 @@ bool CPDF_Parser::LoadCrossRefTable(FX_FILESIZE pos, bool skip) {
 return true;
}

bool CPDF_Parser::ExtractCrossRefTableEntriesAt(FX_FILESIZE pos,
 ObjectMap* out_objects) {
 if (!out_objects)
 return false;

 const FX_FILESIZE saved_pos = syntax_->GetPos();
 syntax_->SetPos(pos);
 std::vector<CrossRefObjData> objects;
 bool ok = ParseCrossRefTable(&objects);
 syntax_->SetPos(saved_pos);

 if (!ok)
 return false;

 for (const auto& obj : objects)
 (*out_objects)[obj.obj_num] = obj.info;

 return true;
}

void CPDF_Parser::MergeCrossRefObjectsData(
 const std::vector<CrossRefObjData>& objects) {
 for (const auto& obj : objects) {
Expand DownExpand Up@@ -1392,6 +1416,21 @@ std::vector<unsigned int> CPDF_Parser::GetTrailerEnds() {
 return trailer_ends;
}

const CPDF_RevisionProvider* CPDF_Parser::GetRevisionProvider() {
 if (!has_parsed_ || revision_xref_list_.empty())
 return nullptr;

 if (!revision_provider_) {
 revision_provider_ = std::make_unique<CPDF_RevisionProvider>();
 if (!revision_provider_->Build(this, revision_xref_list_,
 revision_xref_stream_list_)) {
 revision_provider_.reset();
 return nullptr;
 }
 }
 return revision_provider_.get();
}

bool CPDF_Parser::WriteToArchive(IFX_ArchiveStream* archive,
 FX_FILESIZE src_size) {
 static constexpr FX_FILESIZE kBufferSize = 4096;
Expand Down

17 changes: 17 additions & 0 deletions
core/fpdfapi/parser/cpdf_parser.h

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -29,6 +29,7 @@ class CPDF_LinearizedHeader;
class CPDF_Object;
class CPDF_ObjectStream;
class CPDF_ReadValidator;
class CPDF_RevisionProvider;
class CPDF_SecurityHandler;
class CPDF_SyntaxParser;
class IFX_ArchiveStream;
Expand DownExpand Up@@ -119,6 +120,16 @@ class CPDF_Parser {
 std::vector<unsigned int> GetTrailerEnds();
 bool WriteToArchive(IFX_ArchiveStream* archive, FX_FILESIZE src_size);

 using ObjectMap = std::map<uint32_t, CPDF_CrossRefTable::ObjectInfo>;

 // Re-parse a classic xref table at |pos| and return entries as an ObjectMap.
 // Does not mutate cross_ref_table_ or any other parser state.
 bool ExtractCrossRefTableEntriesAt(FX_FILESIZE pos, ObjectMap* out_objects);

 // Returns the revision provider, building it lazily on first access.
 // Returns nullptr if the parser has not successfully loaded a document.
 const CPDF_RevisionProvider* GetRevisionProvider();

 const CPDF_CrossRefTable* GetCrossRefTableForTesting() const {
 return cross_ref_table_.get();
 }
Expand DownExpand Up@@ -211,6 +222,12 @@ class CPDF_Parser {
 std::set<uint32_t> parsing_obj_nums_;

 RetainPtr<CPDF_SecurityHandler> security_handler_;

 // Populated by LoadAllCrossRefTablesAndStreams.
 // Index 0 = newest (main) revision. After Build() reversal, index 0 = oldest.
 std::vector<FX_FILESIZE> revision_xref_list_;
 std::vector<FX_FILESIZE> revision_xref_stream_list_;
 std::unique_ptr<CPDF_RevisionProvider> revision_provider_;
};

#endif // CORE_FPDFAPI_PARSER_CPDF_PARSER_H_
Loading