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// Copyright 2018 The PDFium Authors
// 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 <limits.h>
#include <string.h>
#include <algorithm>
#include <functional>
#include <iterator>
#include <string>
#include <utility>
#include "public/cpp/fpdf_scopers.h"
#include "public/fpdf_doc.h"
#include "public/fpdf_transformpage.h"
#include "testing/fx_string_testhelpers.h"
using GetBoxInfoFunc =
std::function<bool(FPDF_PAGE, float*, float*, float*, float*)>;
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;
}
void DumpBoxInfo(GetBoxInfoFunc func,
const char* box_type,
FPDF_PAGE page,
int page_idx) {
FS_RECTF rect;
bool ret = func(page, &rect.left, &rect.bottom, &rect.right, &rect.top);
if (!ret) {
printf("Page %d: No %s.\n", page_idx, box_type);
return;
}
printf("Page %d: %s: %0.2f %0.2f %0.2f %0.2f\n", page_idx, box_type,
rect.left, rect.bottom, rect.right, rect.top);
}
void DumpStructureElementAttributes(FPDF_STRUCTELEMENT_ATTR attr, int indent) {
static const size_t kBufSize = 1024;
int count = FPDF_StructElement_Attr_GetCount(attr);
for (int i = 0; i < count; i++) {
char name[kBufSize] = {};
unsigned long len = ULONG_MAX;
if (!FPDF_StructElement_Attr_GetName(attr, i, name, sizeof(name), &len)) {
printf("%*s FPDF_StructElement_Attr_GetName failed for %d\n", indent, "",
i);
continue;
}
FPDF_OBJECT_TYPE type = FPDF_StructElement_Attr_GetType(attr, name);
if (type == FPDF_OBJECT_BOOLEAN) {
int value;
if (!FPDF_StructElement_Attr_GetBooleanValue(attr, name, &value)) {
printf("%*s %s: Failed FPDF_StructElement_Attr_GetBooleanValue\n",
indent, "", name);
continue;
}
printf("%*s %s: %d\n", indent, "", name, value);
} else if (type == FPDF_OBJECT_NUMBER) {
float value;
if (!FPDF_StructElement_Attr_GetNumberValue(attr, name, &value)) {
printf("%*s %s: Failed FPDF_StructElement_Attr_GetNumberValue\n",
indent, "", name);
continue;
}
printf("%*s %s: %f\n", indent, "", name, value);
} else if (type == FPDF_OBJECT_STRING || type == FPDF_OBJECT_NAME) {
unsigned short buffer[kBufSize] = {};
if (!FPDF_StructElement_Attr_GetStringValue(attr, name, buffer,
sizeof(buffer), &len)) {
printf("%*s %s: Failed FPDF_StructElement_Attr_GetStringValue\n",
indent, "", name);
continue;
}
printf("%*s %s: %ls\n", indent, "", name,
ConvertToWString(buffer, len).c_str());
} else if (type == FPDF_OBJECT_UNKNOWN) {
printf("%*s %s: FPDF_OBJECT_UNKNOWN\n", indent, "", name);
} else {
printf("%*s %s: NOT_YET_IMPLEMENTED: %d\n", indent, "", name, type);
}
}
}
} // 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);
if (len > 0)
printf("%*s S: %ls\n", indent * 2, "", ConvertToWString(buf, len).c_str());
int attr_count = FPDF_StructElement_GetAttributeCount(child);
for (int i = 0; i < attr_count; i++) {
FPDF_STRUCTELEMENT_ATTR child_attr =
FPDF_StructElement_GetAttributeAtIndex(child, i);
if (!child_attr)
continue;
printf("%*s A[%d]:\n", indent * 2, "", i);
DumpStructureElementAttributes(child_attr, indent * 2 + 2);
}
memset(buf, 0, sizeof(buf));
len = FPDF_StructElement_GetActualText(child, buf, kBufSize);
if (len > 0) {
printf("%*s ActualText: %ls\n", indent * 2, "",
ConvertToWString(buf, len).c_str());
}
memset(buf, 0, sizeof(buf));
len = FPDF_StructElement_GetAltText(child, buf, kBufSize);
if (len > 0) {
printf("%*s AltText: %ls\n", indent * 2, "",
ConvertToWString(buf, len).c_str());
}
memset(buf, 0, sizeof(buf));
len = FPDF_StructElement_GetID(child, buf, kBufSize);
if (len > 0)
printf("%*s ID: %ls\n", indent * 2, "", ConvertToWString(buf, len).c_str());
memset(buf, 0, sizeof(buf));
len = FPDF_StructElement_GetLang(child, buf, kBufSize);
if (len > 0) {
printf("%*s Lang: %ls\n", indent * 2, "",
ConvertToWString(buf, len).c_str());
}
int mcid = FPDF_StructElement_GetMarkedContentID(child);
if (mcid != -1)
printf("%*s MCID: %d\n", indent * 2, "", mcid);
FPDF_STRUCTELEMENT parent = FPDF_StructElement_GetParent(child);
if (parent) {
memset(buf, 0, sizeof(buf));
len = FPDF_StructElement_GetID(parent, buf, kBufSize);
if (len > 0) {
printf("%*s Parent ID: %ls\n", indent * 2, "",
ConvertToWString(buf, len).c_str());
}
}
memset(buf, 0, sizeof(buf));
len = FPDF_StructElement_GetTitle(child, buf, kBufSize);
if (len > 0) {
printf("%*s Title: %ls\n", indent * 2, "",
ConvertToWString(buf, len).c_str());
}
memset(buf, 0, sizeof(buf));
len = FPDF_StructElement_GetObjType(child, buf, kBufSize);
if (len > 0) {
printf("%*s Type: %ls\n", indent * 2, "",
ConvertToWString(buf, len).c_str());
}
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 DumpPageInfo(FPDF_PAGE page, int page_idx) {
DumpBoxInfo(&FPDFPage_GetMediaBox, "MediaBox", page, page_idx);
DumpBoxInfo(&FPDFPage_GetCropBox, "CropBox", page, page_idx);
DumpBoxInfo(&FPDFPage_GetBleedBox, "BleedBox", page, page_idx);
DumpBoxInfo(&FPDFPage_GetTrimBox, "TrimBox", page, page_idx);
DumpBoxInfo(&FPDFPage_GetArtBox, "ArtBox", page, page_idx);
}
void DumpPageStructure(FPDF_PAGE page, int page_idx) {
ScopedFPDFStructTree 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) {
static constexpr const char* kMetaTags[] = {
"Title", "Author", "Subject", "Keywords",
"Creator", "Producer", "CreationDate", "ModDate"};
for (const char* meta_tag : kMetaTags) {
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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