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This commit is contained in:
saqib mir
2026-06-17 11:03:47 +05:30
parent 20ee7fbe20
commit a39c15d0be
4 changed files with 76 additions and 42 deletions
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bindings/python/pdfengine_py.cpp
+40 -15
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@@ -101,31 +101,56 @@ public:
pdfengine::Lexer lexer(stream->decodedContent);
auto tokens = lexer.tokenize();
pdfengine::ContentParser parser(tokens);
pdfengine::ContentBuilder builder;
auto objects = builder.build(parser.parse());
auto operations = parser.parse();
int textCount = 0;
bool modified = false;
for (auto& obj : objects) {
if (obj->getType() == pdfengine::ContentObjectType::Text) {
if (textCount == object_index) {
auto* textObj = static_cast<pdfengine::TextObject*>(obj.get());
textObj->text = new_text;
modified = true;
break;
for (auto& op : operations) {
if (op.op == "Tj" || op.op == "'") {
if (op.operands.empty()) continue;
auto& strNode = op.operands.back();
if (strNode->type == pdfengine::AstNodeType::String || strNode->type == pdfengine::AstNodeType::HexString) {
if (textCount == object_index) {
strNode->type = pdfengine::AstNodeType::String;
strNode->stringValue = new_text;
modified = true;
break;
}
textCount++;
}
} else if (op.op == "TJ") {
if (op.operands.empty()) continue;
auto& arrNode = op.operands.back();
if (arrNode->type == pdfengine::AstNodeType::Array) {
std::string combinedText;
for (const auto& item : arrNode->arrayItems) {
if (item->type == pdfengine::AstNodeType::String) {
combinedText += item->stringValue;
} else if (item->type == pdfengine::AstNodeType::HexString) {
combinedText += std::string(item->bytesValue.begin(), item->bytesValue.end());
} else if (item->type == pdfengine::AstNodeType::Number) {
if (item->numberValue < -500.0) combinedText += " ";
}
}
if (!combinedText.empty()) {
if (textCount == object_index) {
arrNode->arrayItems.clear();
auto newStrNode = std::make_shared<pdfengine::AstNode>(pdfengine::AstNodeType::String);
newStrNode->stringValue = new_text;
arrNode->arrayItems.push_back(std::move(newStrNode));
modified = true;
break;
}
textCount++;
}
}
textCount++;
}
}
if (!modified) return false;
pdfengine::ContentSerializer cSerializer;
auto newOps = cSerializer.serialize(objects);
pdfengine::AstSerializer astSerializer;
std::string newRawStream = astSerializer.serialize(newOps);
std::string newRawStream = astSerializer.serialize(operations);
pdfengine::qpdf_layer::QpdfWriter writer;
auto res = writer.replacePageStreamAndSave(filepath_, dest_path, page_index, newRawStream);