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// Copyright 2019 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "public/fpdf_javascript.h"
#include <memory>
#include <utility>
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfdoc/cpdf_action.h"
#include "core/fpdfdoc/cpdf_nametree.h"
#include "core/fxcrt/compiler_specific.h"
#include "core/fxcrt/numerics/safe_conversions.h"
#include "fpdfsdk/cpdfsdk_helpers.h"
struct CPDF_JavaScript {
WideString name;
WideString script;
};
FPDF_EXPORT int FPDF_CALLCONV
FPDFDoc_GetJavaScriptActionCount(FPDF_DOCUMENT document) {
CPDF_Document* doc = CPDFDocumentFromFPDFDocument(document);
if (!doc)
return -1;
auto name_tree = CPDF_NameTree::Create(doc, "JavaScript");
return name_tree ? pdfium::checked_cast<int>(name_tree->GetCount()) : 0;
}
FPDF_EXPORT FPDF_JAVASCRIPT_ACTION FPDF_CALLCONV
FPDFDoc_GetJavaScriptAction(FPDF_DOCUMENT document, int index) {
CPDF_Document* doc = CPDFDocumentFromFPDFDocument(document);
if (!doc || index < 0)
return nullptr;
auto name_tree = CPDF_NameTree::Create(doc, "JavaScript");
if (!name_tree || static_cast<size_t>(index) >= name_tree->GetCount())
return nullptr;
WideString name;
RetainPtr<CPDF_Dictionary> obj =
ToDictionary(name_tree->LookupValueAndName(index, &name));
if (!obj)
return nullptr;
// Validate |obj|. Type is optional, but must be valid if present.
CPDF_Action action(std::move(obj));
if (action.GetType() != CPDF_Action::Type::kJavaScript)
return nullptr;
std::optional<WideString> script = action.MaybeGetJavaScript();
if (!script.has_value())
return nullptr;
auto js = std::make_unique<CPDF_JavaScript>();
js->name = name;
js->script = script.value();
return FPDFJavaScriptActionFromCPDFJavaScriptAction(js.release());
}
FPDF_EXPORT void FPDF_CALLCONV
FPDFDoc_CloseJavaScriptAction(FPDF_JAVASCRIPT_ACTION javascript) {
// Take object back across API and destroy it.
std::unique_ptr<CPDF_JavaScript>(
CPDFJavaScriptActionFromFPDFJavaScriptAction(javascript));
}
FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDFJavaScriptAction_GetName(FPDF_JAVASCRIPT_ACTION javascript,
FPDF_WCHAR* buffer,
unsigned long buflen) {
CPDF_JavaScript* js =
CPDFJavaScriptActionFromFPDFJavaScriptAction(javascript);
if (!js) {
return 0;
}
// SAFETY: required from caller.
return Utf16EncodeMaybeCopyAndReturnLength(
js->name, UNSAFE_BUFFERS(SpanFromFPDFApiArgs(buffer, buflen)));
}
FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDFJavaScriptAction_GetScript(FPDF_JAVASCRIPT_ACTION javascript,
FPDF_WCHAR* buffer,
unsigned long buflen) {
CPDF_JavaScript* js =
CPDFJavaScriptActionFromFPDFJavaScriptAction(javascript);
if (!js) {
return 0;
}
// SAFETY: required from caller.
return Utf16EncodeMaybeCopyAndReturnLength(
js->script, UNSAFE_BUFFERS(SpanFromFPDFApiArgs(buffer, buflen)));
}
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