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// Copyright 2018 The PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "samples/pdfium_test_dump_helper.h"
#include <string.h>
#include <algorithm>
#include <memory>
#include <string>
#include <utility>
#include "public/cpp/fpdf_deleters.h"
#include "testing/test_support.h"
namespace {
std::wstring ConvertToWString(const unsigned short* buf,
unsigned long buf_size) {
std::wstring result;
result.reserve(buf_size);
std::copy(buf, buf + buf_size, std::back_inserter(result));
return result;
}
} // namespace
void DumpChildStructure(FPDF_STRUCTELEMENT child, int indent) {
static const size_t kBufSize = 1024;
unsigned short buf[kBufSize];
unsigned long len = FPDF_StructElement_GetType(child, buf, kBufSize);
printf("%*s%ls", indent * 2, "", ConvertToWString(buf, len).c_str());
memset(buf, 0, sizeof(buf));
len = FPDF_StructElement_GetTitle(child, buf, kBufSize);
if (len > 0)
printf(": '%ls'", ConvertToWString(buf, len).c_str());
memset(buf, 0, sizeof(buf));
len = FPDF_StructElement_GetAltText(child, buf, kBufSize);
if (len > 0)
printf(" (%ls)", ConvertToWString(buf, len).c_str());
printf("\n");
for (int i = 0; i < FPDF_StructElement_CountChildren(child); ++i) {
FPDF_STRUCTELEMENT sub_child = FPDF_StructElement_GetChildAtIndex(child, i);
// If the child is not an Element then this will return null. This can
// happen if the element is things like an object reference or a stream.
if (!sub_child)
continue;
DumpChildStructure(sub_child, indent + 1);
}
}
void DumpPageStructure(FPDF_PAGE page, const int page_idx) {
std::unique_ptr<void, FPDFStructTreeDeleter> tree(
FPDF_StructTree_GetForPage(page));
if (!tree) {
fprintf(stderr, "Failed to load struct tree for page %d\n", page_idx);
return;
}
printf("Structure Tree for Page %d\n", page_idx);
for (int i = 0; i < FPDF_StructTree_CountChildren(tree.get()); ++i) {
FPDF_STRUCTELEMENT child = FPDF_StructTree_GetChildAtIndex(tree.get(), i);
if (!child) {
fprintf(stderr, "Failed to load child %d for page %d\n", i, page_idx);
continue;
}
DumpChildStructure(child, 0);
}
printf("\n\n");
}
void DumpMetaData(FPDF_DOCUMENT doc) {
constexpr const char* meta_tags[] = {"Title", "Author", "Subject",
"Keywords", "Creator", "Producer",
"CreationDate", "ModDate"};
for (const char* meta_tag : meta_tags) {
char meta_buffer[4096];
unsigned long len =
FPDF_GetMetaText(doc, meta_tag, meta_buffer, sizeof(meta_buffer));
if (!len)
continue;
auto* meta_string = reinterpret_cast<unsigned short*>(meta_buffer);
printf("%-12s = %ls (%lu bytes)\n", meta_tag,
GetPlatformWString(meta_string).c_str(), len);
}
}
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