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chromium / chromium / src / 9478e129bf1ab74b7629d2837b88189d234587b7 / . / pdf / pdfium / pdfium_engine.cc
blob: 4be359a04d86824b0dc82f2d754623985c522d4f [file] [log] [blame]
// Copyright (c) 2012 The Chromium 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 "pdf/pdfium/pdfium_engine.h"
#include <math.h>
#include <stddef.h>
#include <stdint.h>
#include <algorithm>
#include <limits>
#include <memory>
#include <set>
#include "base/auto_reset.h"
#include "base/i18n/encoding_detection.h"
#include "base/i18n/icu_string_conversions.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/numerics/safe_conversions.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "build/build_config.h"
#include "gin/array_buffer.h"
#include "gin/public/gin_embedders.h"
#include "gin/public/isolate_holder.h"
#include "pdf/draw_utils.h"
#include "pdf/pdfium/pdfium_api_string_buffer_adapter.h"
#include "pdf/pdfium/pdfium_mem_buffer_file_read.h"
#include "pdf/pdfium/pdfium_mem_buffer_file_write.h"
#include "pdf/url_loader_wrapper_impl.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/c/pp_input_event.h"
#include "ppapi/c/ppb_core.h"
#include "ppapi/c/private/ppb_pdf.h"
#include "ppapi/cpp/dev/memory_dev.h"
#include "ppapi/cpp/input_event.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/private/pdf.h"
#include "ppapi/cpp/trusted/browser_font_trusted.h"
#include "ppapi/cpp/url_response_info.h"
#include "ppapi/cpp/var.h"
#include "ppapi/cpp/var_dictionary.h"
#include "printing/pdf_transform.h"
#include "printing/units.h"
#include "third_party/pdfium/public/fpdf_annot.h"
#include "third_party/pdfium/public/fpdf_attachment.h"
#include "third_party/pdfium/public/fpdf_catalog.h"
#include "third_party/pdfium/public/fpdf_edit.h"
#include "third_party/pdfium/public/fpdf_ext.h"
#include "third_party/pdfium/public/fpdf_flatten.h"
#include "third_party/pdfium/public/fpdf_ppo.h"
#include "third_party/pdfium/public/fpdf_save.h"
#include "third_party/pdfium/public/fpdf_searchex.h"
#include "third_party/pdfium/public/fpdf_sysfontinfo.h"
#include "third_party/pdfium/public/fpdf_transformpage.h"
#include "third_party/pdfium/public/fpdfview.h"
#include "ui/events/keycodes/keyboard_codes.h"
#include "ui/gfx/codec/jpeg_codec.h"
#include "ui/gfx/geometry/rect.h"
#include "v8/include/v8.h"
using printing::ConvertUnit;
using printing::ConvertUnitDouble;
using printing::kPointsPerInch;
using printing::kPixelsPerInch;
namespace chrome_pdf {
static_assert(static_cast<int>(PDFEngine::FormType::kNone) == FORMTYPE_NONE,
"None form types must match");
static_assert(static_cast<int>(PDFEngine::FormType::kAcroForm) ==
FORMTYPE_ACRO_FORM,
"AcroForm form types must match");
static_assert(static_cast<int>(PDFEngine::FormType::kXFAFull) ==
FORMTYPE_XFA_FULL,
"XFA full form types must match");
static_assert(static_cast<int>(PDFEngine::FormType::kXFAForeground) ==
FORMTYPE_XFA_FOREGROUND,
"XFA foreground form types must match");
static_assert(static_cast<int>(PDFEngine::FormType::kCount) == FORMTYPE_COUNT,
"Form type counts must match");
namespace {
const int32_t kPageShadowTop = 3;
const int32_t kPageShadowBottom = 7;
const int32_t kPageShadowLeft = 5;
const int32_t kPageShadowRight = 5;
const int32_t kPageSeparatorThickness = 4;
const int32_t kHighlightColorR = 153;
const int32_t kHighlightColorG = 193;
const int32_t kHighlightColorB = 218;
const uint32_t kPendingPageColor = 0xFFEEEEEE;
const uint32_t kFormHighlightColor = 0xFFE4DD;
const int32_t kFormHighlightAlpha = 100;
constexpr int kMaxPasswordTries = 3;
constexpr base::TimeDelta kTouchLongPressTimeout =
base::TimeDelta::FromMilliseconds(300);
// See Table 3.20 in
// http://www.adobe.com/devnet/acrobat/pdfs/pdf_reference_1-7.pdf
const uint32_t kPDFPermissionPrintLowQualityMask = 1 << 2;
const uint32_t kPDFPermissionPrintHighQualityMask = 1 << 11;
const uint32_t kPDFPermissionCopyMask = 1 << 4;
const uint32_t kPDFPermissionCopyAccessibleMask = 1 << 9;
const int32_t kLoadingTextVerticalOffset = 50;
// The maximum amount of time we'll spend doing a paint before we give back
// control of the thread.
constexpr base::TimeDelta kMaxProgressivePaintTime =
base::TimeDelta::FromMilliseconds(300);
// The maximum amount of time we'll spend doing the first paint. This is less
// than the above to keep things smooth if the user is scrolling quickly. This
// is set to 250 ms to give enough time for most PDFs to render, while avoiding
// adding too much latency to the display of the final image when the user
// stops scrolling.
// Setting a higher value has minimal benefit (scrolling at less than 4 fps will
// never be a great experience) and there is some cost, since when the user
// stops scrolling the in-progress painting has to complete or timeout before
// the final painting can start.
// The scrollbar will always be responsive since it is managed by a separate
// process.
constexpr base::TimeDelta kMaxInitialProgressivePaintTime =
base::TimeDelta::FromMilliseconds(250);
PDFiumEngine* g_engine_for_fontmapper = nullptr;
std::vector<uint32_t> GetPageNumbersFromPrintPageNumberRange(
const PP_PrintPageNumberRange_Dev* page_ranges,
uint32_t page_range_count) {
std::vector<uint32_t> page_numbers;
for (uint32_t index = 0; index < page_range_count; ++index) {
for (uint32_t page_number = page_ranges[index].first_page_number;
page_number <= page_ranges[index].last_page_number; ++page_number) {
page_numbers.push_back(page_number);
}
}
return page_numbers;
}
#if defined(OS_LINUX)
PP_Instance g_last_instance_id;
// TODO(npm): Move font stuff to another file to reduce the size of this one
PP_BrowserFont_Trusted_Weight WeightToBrowserFontTrustedWeight(int weight) {
static_assert(PP_BROWSERFONT_TRUSTED_WEIGHT_100 == 0,
"PP_BrowserFont_Trusted_Weight min");
static_assert(PP_BROWSERFONT_TRUSTED_WEIGHT_900 == 8,
"PP_BrowserFont_Trusted_Weight max");
const int kMinimumWeight = 100;
const int kMaximumWeight = 900;
int normalized_weight =
std::min(std::max(weight, kMinimumWeight), kMaximumWeight);
normalized_weight = (normalized_weight / 100) - 1;
return static_cast<PP_BrowserFont_Trusted_Weight>(normalized_weight);
}
// This list is for CPWL_FontMap::GetDefaultFontByCharset().
// We pretend to have these font natively and let the browser (or underlying
// fontconfig) to pick the proper font on the system.
void EnumFonts(FPDF_SYSFONTINFO* sysfontinfo, void* mapper) {
FPDF_AddInstalledFont(mapper, "Arial", FXFONT_DEFAULT_CHARSET);
const FPDF_CharsetFontMap* font_map = FPDF_GetDefaultTTFMap();
for (; font_map->charset != -1; ++font_map) {
FPDF_AddInstalledFont(mapper, font_map->fontname, font_map->charset);
}
}
void* MapFont(FPDF_SYSFONTINFO*,
int weight,
int italic,
int charset,
int pitch_family,
const char* face,
int* exact) {
// Do not attempt to map fonts if pepper is not initialized (for privet local
// printing).
// TODO(noamsml): Real font substitution (http://crbug.com/391978)
if (!pp::Module::Get())
return nullptr;
pp::BrowserFontDescription description;
// Pretend the system does not have the Symbol font to force a fallback to
// the built in Symbol font in CFX_FontMapper::FindSubstFont().
if (strcmp(face, "Symbol") == 0)
return nullptr;
if (pitch_family & FXFONT_FF_FIXEDPITCH) {
description.set_family(PP_BROWSERFONT_TRUSTED_FAMILY_MONOSPACE);
} else if (pitch_family & FXFONT_FF_ROMAN) {
description.set_family(PP_BROWSERFONT_TRUSTED_FAMILY_SERIF);
}
static const struct {
const char* pdf_name;
const char* face;
bool bold;
bool italic;
} kPdfFontSubstitutions[] = {
{"Courier", "Courier New", false, false},
{"Courier-Bold", "Courier New", true, false},
{"Courier-BoldOblique", "Courier New", true, true},
{"Courier-Oblique", "Courier New", false, true},
{"Helvetica", "Arial", false, false},
{"Helvetica-Bold", "Arial", true, false},
{"Helvetica-BoldOblique", "Arial", true, true},
{"Helvetica-Oblique", "Arial", false, true},
{"Times-Roman", "Times New Roman", false, false},
{"Times-Bold", "Times New Roman", true, false},
{"Times-BoldItalic", "Times New Roman", true, true},
{"Times-Italic", "Times New Roman", false, true},
// MS P?(Mincho|Gothic) are the most notable fonts in Japanese PDF files
// without embedding the glyphs. Sometimes the font names are encoded
// in Japanese Windows's locale (CP932/Shift_JIS) without space.
// Most Linux systems don't have the exact font, but for outsourcing
// fontconfig to find substitutable font in the system, we pass ASCII
// font names to it.
{"MS-PGothic", "MS PGothic", false, false},
{"MS-Gothic", "MS Gothic", false, false},
{"MS-PMincho", "MS PMincho", false, false},
{"MS-Mincho", "MS Mincho", false, false},
// MS PGothic in Shift_JIS encoding.
{"\x82\x6C\x82\x72\x82\x6F\x83\x53\x83\x56\x83\x62\x83\x4E", "MS PGothic",
false, false},
// MS Gothic in Shift_JIS encoding.
{"\x82\x6C\x82\x72\x83\x53\x83\x56\x83\x62\x83\x4E", "MS Gothic", false,
false},
// MS PMincho in Shift_JIS encoding.
{"\x82\x6C\x82\x72\x82\x6F\x96\xBE\x92\xA9", "MS PMincho", false, false},
// MS Mincho in Shift_JIS encoding.
{"\x82\x6C\x82\x72\x96\xBE\x92\xA9", "MS Mincho", false, false},
};
// Similar logic exists in PDFium's CFX_FolderFontInfo::FindFont().
if (charset == FXFONT_ANSI_CHARSET && (pitch_family & FXFONT_FF_FIXEDPITCH))
face = "Courier New";
// Map from the standard PDF fonts to TrueType font names.
size_t i;
for (i = 0; i < arraysize(kPdfFontSubstitutions); ++i) {
if (strcmp(face, kPdfFontSubstitutions[i].pdf_name) == 0) {
description.set_face(kPdfFontSubstitutions[i].face);
if (kPdfFontSubstitutions[i].bold)
description.set_weight(PP_BROWSERFONT_TRUSTED_WEIGHT_BOLD);
if (kPdfFontSubstitutions[i].italic)
description.set_italic(true);
break;
}
}
if (i == arraysize(kPdfFontSubstitutions)) {
// Convert to UTF-8 before calling set_face().
std::string face_utf8;
if (base::IsStringUTF8(face)) {
face_utf8 = face;
} else {
std::string encoding;
if (base::DetectEncoding(face, &encoding)) {
// ConvertToUtf8AndNormalize() clears |face_utf8| on failure.
base::ConvertToUtf8AndNormalize(face, encoding, &face_utf8);
}
}
if (face_utf8.empty())
return nullptr;
description.set_face(face_utf8);
description.set_weight(WeightToBrowserFontTrustedWeight(weight));
description.set_italic(italic > 0);
}
if (!pp::PDF::IsAvailable()) {
NOTREACHED();
return nullptr;
}
if (g_engine_for_fontmapper)
g_engine_for_fontmapper->FontSubstituted();
PP_Resource font_resource = pp::PDF::GetFontFileWithFallback(
pp::InstanceHandle(g_last_instance_id),
&description.pp_font_description(),
static_cast<PP_PrivateFontCharset>(charset));
long res_id = font_resource;
return reinterpret_cast<void*>(res_id);
}
unsigned long GetFontData(FPDF_SYSFONTINFO*,
void* font_id,
unsigned int table,
unsigned char* buffer,
unsigned long buf_size) {
if (!pp::PDF::IsAvailable()) {
NOTREACHED();
return 0;
}
uint32_t size = buf_size;
long res_id = reinterpret_cast<long>(font_id);
if (!pp::PDF::GetFontTableForPrivateFontFile(res_id, table, buffer, &size))
return 0;
return size;
}
void DeleteFont(FPDF_SYSFONTINFO*, void* font_id) {
long res_id = reinterpret_cast<long>(font_id);
pp::Module::Get()->core()->ReleaseResource(res_id);
}
FPDF_SYSFONTINFO g_font_info = {1, 0, EnumFonts, MapFont, 0,
GetFontData, 0, 0, DeleteFont};
#else
struct FPDF_SYSFONTINFO_WITHMETRICS : public FPDF_SYSFONTINFO {
explicit FPDF_SYSFONTINFO_WITHMETRICS(FPDF_SYSFONTINFO* sysfontinfo) {
version = sysfontinfo->version;
default_sysfontinfo = sysfontinfo;
}
~FPDF_SYSFONTINFO_WITHMETRICS() {
FPDF_FreeDefaultSystemFontInfo(default_sysfontinfo);
}
FPDF_SYSFONTINFO* default_sysfontinfo;
};
FPDF_SYSFONTINFO_WITHMETRICS* g_font_info = nullptr;
void* MapFontWithMetrics(FPDF_SYSFONTINFO* sysfontinfo,
int weight,
int italic,
int charset,
int pitch_family,
const char* face,
int* exact) {
auto* fontinfo_with_metrics =
static_cast<FPDF_SYSFONTINFO_WITHMETRICS*>(sysfontinfo);
if (!fontinfo_with_metrics->default_sysfontinfo->MapFont)
return nullptr;
void* mapped_font = fontinfo_with_metrics->default_sysfontinfo->MapFont(
fontinfo_with_metrics->default_sysfontinfo, weight, italic, charset,
pitch_family, face, exact);
if (mapped_font && g_engine_for_fontmapper)
g_engine_for_fontmapper->FontSubstituted();
return mapped_font;
}
void DeleteFont(FPDF_SYSFONTINFO* sysfontinfo, void* font_id) {
auto* fontinfo_with_metrics =
static_cast<FPDF_SYSFONTINFO_WITHMETRICS*>(sysfontinfo);
if (!fontinfo_with_metrics->default_sysfontinfo->DeleteFont)
return;
fontinfo_with_metrics->default_sysfontinfo->DeleteFont(
fontinfo_with_metrics->default_sysfontinfo, font_id);
}
void EnumFonts(FPDF_SYSFONTINFO* sysfontinfo, void* mapper) {
auto* fontinfo_with_metrics =
static_cast<FPDF_SYSFONTINFO_WITHMETRICS*>(sysfontinfo);
if (!fontinfo_with_metrics->default_sysfontinfo->EnumFonts)
return;
fontinfo_with_metrics->default_sysfontinfo->EnumFonts(
fontinfo_with_metrics->default_sysfontinfo, mapper);
}
unsigned long GetFaceName(FPDF_SYSFONTINFO* sysfontinfo,
void* hFont,
char* buffer,
unsigned long buffer_size) {
auto* fontinfo_with_metrics =
static_cast<FPDF_SYSFONTINFO_WITHMETRICS*>(sysfontinfo);
if (!fontinfo_with_metrics->default_sysfontinfo->GetFaceName)
return 0;
return fontinfo_with_metrics->default_sysfontinfo->GetFaceName(
fontinfo_with_metrics->default_sysfontinfo, hFont, buffer, buffer_size);
}
void* GetFont(FPDF_SYSFONTINFO* sysfontinfo, const char* face) {
auto* fontinfo_with_metrics =
static_cast<FPDF_SYSFONTINFO_WITHMETRICS*>(sysfontinfo);
if (!fontinfo_with_metrics->default_sysfontinfo->GetFont)
return nullptr;
return fontinfo_with_metrics->default_sysfontinfo->GetFont(
fontinfo_with_metrics->default_sysfontinfo, face);
}
int GetFontCharset(FPDF_SYSFONTINFO* sysfontinfo, void* hFont) {
auto* fontinfo_with_metrics =
static_cast<FPDF_SYSFONTINFO_WITHMETRICS*>(sysfontinfo);
if (!fontinfo_with_metrics->default_sysfontinfo->GetFontCharset)
return 0;
return fontinfo_with_metrics->default_sysfontinfo->GetFontCharset(
fontinfo_with_metrics->default_sysfontinfo, hFont);
}
unsigned long GetFontData(FPDF_SYSFONTINFO* sysfontinfo,
void* hFont,
unsigned int table,
unsigned char* buffer,
unsigned long buf_size) {
auto* fontinfo_with_metrics =
static_cast<FPDF_SYSFONTINFO_WITHMETRICS*>(sysfontinfo);
if (!fontinfo_with_metrics->default_sysfontinfo->GetFontData)
return 0;
return fontinfo_with_metrics->default_sysfontinfo->GetFontData(
fontinfo_with_metrics->default_sysfontinfo, hFont, table, buffer,
buf_size);
}
void Release(FPDF_SYSFONTINFO* sysfontinfo) {
auto* fontinfo_with_metrics =
static_cast<FPDF_SYSFONTINFO_WITHMETRICS*>(sysfontinfo);
if (!fontinfo_with_metrics->default_sysfontinfo->Release)
return;
fontinfo_with_metrics->default_sysfontinfo->Release(
fontinfo_with_metrics->default_sysfontinfo);
}
#endif // defined(OS_LINUX)
PDFiumEngine* g_engine_for_unsupported = nullptr;
void Unsupported_Handler(UNSUPPORT_INFO*, int type) {
if (!g_engine_for_unsupported) {
NOTREACHED();
return;
}
g_engine_for_unsupported->UnsupportedFeature(type);
}
UNSUPPORT_INFO g_unsupported_info = {1, Unsupported_Handler};
// Set the destination page size and content area in points based on source
// page rotation and orientation.
//
// |rotated| True if source page is rotated 90 degree or 270 degree.
// |is_src_page_landscape| is true if the source page orientation is landscape.
// |page_size| has the actual destination page size in points.
// |content_rect| has the actual destination page printable area values in
// points.
void SetPageSizeAndContentRect(bool rotated,
bool is_src_page_landscape,
pp::Size* page_size,
pp::Rect* content_rect) {
bool is_dst_page_landscape = page_size->width() > page_size->height();
bool page_orientation_mismatched =
is_src_page_landscape != is_dst_page_landscape;
bool rotate_dst_page = rotated ^ page_orientation_mismatched;
if (rotate_dst_page) {
page_size->SetSize(page_size->height(), page_size->width());
content_rect->SetRect(content_rect->y(), content_rect->x(),
content_rect->height(), content_rect->width());
}
}
template <class S>
bool IsAboveOrDirectlyLeftOf(const S& lhs, const S& rhs) {
return lhs.y() < rhs.y() || (lhs.y() == rhs.y() && lhs.x() < rhs.x());
}
int CalculateCenterForZoom(int center, int length, double zoom) {
int adjusted_center =
static_cast<int>(center * zoom) - static_cast<int>(length * zoom / 2);
return std::max(adjusted_center, 0);
}
// This formats a string with special 0xfffe end-of-line hyphens the same way
// as Adobe Reader. When a hyphen is encountered, the next non-CR/LF whitespace
// becomes CR+LF and the hyphen is erased. If there is no whitespace between
// two hyphens, the latter hyphen is erased and ignored.
void FormatStringWithHyphens(base::string16* text) {
// First pass marks all the hyphen positions.
struct HyphenPosition {
HyphenPosition() : position(0), next_whitespace_position(0) {}
size_t position;
size_t next_whitespace_position; // 0 for none
};
std::vector<HyphenPosition> hyphen_positions;
HyphenPosition current_hyphen_position;
bool current_hyphen_position_is_valid = false;
const base::char16 kPdfiumHyphenEOL = 0xfffe;
for (size_t i = 0; i < text->size(); ++i) {
const base::char16& current_char = (*text)[i];
if (current_char == kPdfiumHyphenEOL) {
if (current_hyphen_position_is_valid)
hyphen_positions.push_back(current_hyphen_position);
current_hyphen_position = HyphenPosition();
current_hyphen_position.position = i;
current_hyphen_position_is_valid = true;
} else if (base::IsUnicodeWhitespace(current_char)) {
if (current_hyphen_position_is_valid) {
if (current_char != L'\r' && current_char != L'\n')
current_hyphen_position.next_whitespace_position = i;
hyphen_positions.push_back(current_hyphen_position);
current_hyphen_position_is_valid = false;
}
}
}
if (current_hyphen_position_is_valid)
hyphen_positions.push_back(current_hyphen_position);
// With all the hyphen positions, do the search and replace.
while (!hyphen_positions.empty()) {
static const base::char16 kCr[] = {L'\r', L'\0'};
const HyphenPosition& position = hyphen_positions.back();
if (position.next_whitespace_position != 0) {
(*text)[position.next_whitespace_position] = L'\n';
text->insert(position.next_whitespace_position, kCr);
}
text->erase(position.position, 1);
hyphen_positions.pop_back();
}
// Adobe Reader also get rid of trailing spaces right before a CRLF.
static const base::char16 kSpaceCrCn[] = {L' ', L'\r', L'\n', L'\0'};
static const base::char16 kCrCn[] = {L'\r', L'\n', L'\0'};
base::ReplaceSubstringsAfterOffset(text, 0, kSpaceCrCn, kCrCn);
}
// Replace CR/LF with just LF on POSIX.
void FormatStringForOS(base::string16* text) {
#if defined(OS_POSIX)
static const base::char16 kCr[] = {L'\r', L'\0'};
static const base::char16 kBlank[] = {L'\0'};
base::ReplaceChars(*text, kCr, kBlank, text);
#elif defined(OS_WIN)
// Do nothing
#else
NOTIMPLEMENTED();
#endif
}
// Returns true if |cur| is a character to break on.
// For double clicks, look for work breaks.
// For triple clicks, look for line breaks.
// The actual algorithm used in Blink is much more complicated, so do a simple
// approximation.
bool FindMultipleClickBoundary(bool is_double_click, base::char16 cur) {
if (!is_double_click)
return cur == '\n';
// Deal with ASCII characters.
if (base::IsAsciiAlpha(cur) || base::IsAsciiDigit(cur) || cur == '_')
return false;
if (cur < 128)
return true;
static constexpr base::char16 kZeroWidthSpace = 0x200B;
if (cur == kZeroWidthSpace)
return true;
return false;
}
std::string GetDocumentMetadata(FPDF_DOCUMENT doc, const std::string& key) {
size_t size = FPDF_GetMetaText(doc, key.c_str(), nullptr, 0);
if (size == 0)
return std::string();
base::string16 value;
PDFiumAPIStringBufferSizeInBytesAdapter<base::string16> string_adapter(
&value, size, false);
string_adapter.Close(
FPDF_GetMetaText(doc, key.c_str(), string_adapter.GetData(), size));
return base::UTF16ToUTF8(value);
}
gin::IsolateHolder* g_isolate_holder = nullptr;
void SetUpV8() {
gin::IsolateHolder::Initialize(gin::IsolateHolder::kNonStrictMode,
gin::IsolateHolder::kStableV8Extras,
gin::ArrayBufferAllocator::SharedInstance());
DCHECK(!g_isolate_holder);
g_isolate_holder = new gin::IsolateHolder(base::ThreadTaskRunnerHandle::Get(),
gin::IsolateHolder::kSingleThread);
g_isolate_holder->isolate()->Enter();
}
void TearDownV8() {
g_isolate_holder->isolate()->Exit();
delete g_isolate_holder;
g_isolate_holder = nullptr;
}
int GetBlockForJpeg(void* param,
unsigned long pos,
unsigned char* buf,
unsigned long size) {
std::vector<uint8_t>* data_vector = static_cast<std::vector<uint8_t>*>(param);
if (pos + size < pos || pos + size > data_vector->size())
return 0;
memcpy(buf, data_vector->data() + pos, size);
return 1;
}
std::string WideStringToString(FPDF_WIDESTRING wide_string) {
return base::UTF16ToUTF8(reinterpret_cast<const base::char16*>(wide_string));
}
// Returns true if the given |area| and |form_type| combination from
// PDFiumEngine::GetCharIndex() indicates it is a form text area.
bool IsFormTextArea(PDFiumPage::Area area, int form_type) {
if (form_type == FPDF_FORMFIELD_UNKNOWN)
return false;
DCHECK_EQ(area, PDFiumPage::FormTypeToArea(form_type));
return area == PDFiumPage::FORM_TEXT_AREA;
}
// Checks whether or not focus is in an editable form text area given the
// form field annotation flags and form type.
bool CheckIfEditableFormTextArea(int flags, int form_type) {
if (!!(flags & FPDF_FORMFLAG_READONLY))
return false;
if (form_type == FPDF_FORMFIELD_TEXTFIELD)
return true;
if (form_type == FPDF_FORMFIELD_COMBOBOX &&
(!!(flags & FPDF_FORMFLAG_CHOICE_EDIT))) {
return true;
}
return false;
}
bool IsLinkArea(PDFiumPage::Area area) {
return area == PDFiumPage::WEBLINK_AREA || area == PDFiumPage::DOCLINK_AREA;
}
// Normalize a MouseInputEvent. For Mac, this means transforming ctrl + left
// button down events into a right button down events.
pp::MouseInputEvent NormalizeMouseEvent(pp::Instance* instance,
const pp::MouseInputEvent& event) {
pp::MouseInputEvent normalized_event = event;
#if defined(OS_MACOSX)
uint32_t modifiers = event.GetModifiers();
if ((modifiers & PP_INPUTEVENT_MODIFIER_CONTROLKEY) &&
event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_LEFT &&
event.GetType() == PP_INPUTEVENT_TYPE_MOUSEDOWN) {
uint32_t new_modifiers = modifiers & ~PP_INPUTEVENT_MODIFIER_CONTROLKEY;
normalized_event = pp::MouseInputEvent(
instance, PP_INPUTEVENT_TYPE_MOUSEDOWN, event.GetTimeStamp(),
new_modifiers, PP_INPUTEVENT_MOUSEBUTTON_RIGHT, event.GetPosition(), 1,
event.GetMovement());
}
#endif
return normalized_event;
}
} // namespace
bool InitializeSDK() {
SetUpV8();
FPDF_LIBRARY_CONFIG config;
config.version = 2;
config.m_pUserFontPaths = nullptr;
config.m_pIsolate = v8::Isolate::GetCurrent();
config.m_v8EmbedderSlot = gin::kEmbedderPDFium;
FPDF_InitLibraryWithConfig(&config);
#if defined(OS_LINUX)
// Font loading doesn't work in the renderer sandbox in Linux.
FPDF_SetSystemFontInfo(&g_font_info);
#else
g_font_info =
new FPDF_SYSFONTINFO_WITHMETRICS(FPDF_GetDefaultSystemFontInfo());
g_font_info->Release = Release;
g_font_info->EnumFonts = EnumFonts;
// Set new MapFont that calculates metrics
g_font_info->MapFont = MapFontWithMetrics;
g_font_info->GetFont = GetFont;
g_font_info->GetFaceName = GetFaceName;
g_font_info->GetFontCharset = GetFontCharset;
g_font_info->GetFontData = GetFontData;
g_font_info->DeleteFont = DeleteFont;
FPDF_SetSystemFontInfo(g_font_info);
#endif
FSDK_SetUnSpObjProcessHandler(&g_unsupported_info);
return true;
}
void ShutdownSDK() {
FPDF_DestroyLibrary();
#if !defined(OS_LINUX)
delete g_font_info;
#endif
TearDownV8();
}
std::unique_ptr<PDFEngine> PDFEngine::Create(PDFEngine::Client* client) {
return std::make_unique<PDFiumEngine>(client);
}
PDFiumEngine::PDFiumEngine(PDFEngine::Client* client)
: client_(client),
current_zoom_(1.0),
current_rotation_(0),
doc_(nullptr),
form_(nullptr),
defer_page_unload_(false),
selecting_(false),
mouse_down_state_(PDFiumPage::NONSELECTABLE_AREA,
PDFiumPage::LinkTarget()),
in_form_text_area_(false),
editable_form_text_area_(false),
mouse_left_button_down_(false),
permissions_(0),
permissions_handler_revision_(-1),
fpdf_availability_(nullptr),
last_page_mouse_down_(-1),
most_visible_page_(-1),
called_do_document_action_(false),
render_grayscale_(false),
render_annots_(true) {
find_factory_.Initialize(this);
password_factory_.Initialize(this);
file_access_.m_FileLen = 0;
file_access_.m_GetBlock = &GetBlock;
file_access_.m_Param = this;
file_availability_.version = 1;
file_availability_.IsDataAvail = &IsDataAvail;
file_availability_.engine = this;
download_hints_.version = 1;
download_hints_.AddSegment = &AddSegment;
download_hints_.engine = this;
// Initialize FPDF_FORMFILLINFO member variables. Deriving from this struct
// allows the static callbacks to be able to cast the FPDF_FORMFILLINFO in
// callbacks to ourself instead of maintaining a map of them to
// PDFiumEngine.
FPDF_FORMFILLINFO::version = 1;
FPDF_FORMFILLINFO::m_pJsPlatform = this;
FPDF_FORMFILLINFO::Release = nullptr;
FPDF_FORMFILLINFO::FFI_Invalidate = Form_Invalidate;
FPDF_FORMFILLINFO::FFI_OutputSelectedRect = Form_OutputSelectedRect;
FPDF_FORMFILLINFO::FFI_SetCursor = Form_SetCursor;
FPDF_FORMFILLINFO::FFI_SetTimer = Form_SetTimer;
FPDF_FORMFILLINFO::FFI_KillTimer = Form_KillTimer;
FPDF_FORMFILLINFO::FFI_GetLocalTime = Form_GetLocalTime;
FPDF_FORMFILLINFO::FFI_OnChange = Form_OnChange;
FPDF_FORMFILLINFO::FFI_GetPage = Form_GetPage;
FPDF_FORMFILLINFO::FFI_GetCurrentPage = Form_GetCurrentPage;
FPDF_FORMFILLINFO::FFI_GetRotation = Form_GetRotation;
FPDF_FORMFILLINFO::FFI_ExecuteNamedAction = Form_ExecuteNamedAction;
FPDF_FORMFILLINFO::FFI_SetTextFieldFocus = Form_SetTextFieldFocus;
FPDF_FORMFILLINFO::FFI_DoURIAction = Form_DoURIAction;
FPDF_FORMFILLINFO::FFI_DoGoToAction = Form_DoGoToAction;
#if defined(PDF_ENABLE_XFA)
FPDF_FORMFILLINFO::version = 2;
FPDF_FORMFILLINFO::FFI_EmailTo = Form_EmailTo;
FPDF_FORMFILLINFO::FFI_DisplayCaret = Form_DisplayCaret;
FPDF_FORMFILLINFO::FFI_SetCurrentPage = Form_SetCurrentPage;
FPDF_FORMFILLINFO::FFI_GetCurrentPageIndex = Form_GetCurrentPageIndex;
FPDF_FORMFILLINFO::FFI_GetPageViewRect = Form_GetPageViewRect;
FPDF_FORMFILLINFO::FFI_GetPlatform = Form_GetPlatform;
FPDF_FORMFILLINFO::FFI_PageEvent = nullptr;
FPDF_FORMFILLINFO::FFI_PopupMenu = Form_PopupMenu;
FPDF_FORMFILLINFO::FFI_PostRequestURL = Form_PostRequestURL;
FPDF_FORMFILLINFO::FFI_PutRequestURL = Form_PutRequestURL;
FPDF_FORMFILLINFO::FFI_UploadTo = Form_UploadTo;
FPDF_FORMFILLINFO::FFI_DownloadFromURL = Form_DownloadFromURL;
FPDF_FORMFILLINFO::FFI_OpenFile = Form_OpenFile;
FPDF_FORMFILLINFO::FFI_GotoURL = Form_GotoURL;
FPDF_FORMFILLINFO::FFI_GetLanguage = Form_GetLanguage;
#endif // defined(PDF_ENABLE_XFA)
IPDF_JSPLATFORM::version = 3;
IPDF_JSPLATFORM::app_alert = Form_Alert;
IPDF_JSPLATFORM::app_beep = Form_Beep;
IPDF_JSPLATFORM::app_response = Form_Response;
IPDF_JSPLATFORM::Doc_getFilePath = Form_GetFilePath;
IPDF_JSPLATFORM::Doc_mail = Form_Mail;
IPDF_JSPLATFORM::Doc_print = Form_Print;
IPDF_JSPLATFORM::Doc_submitForm = Form_SubmitForm;
IPDF_JSPLATFORM::Doc_gotoPage = Form_GotoPage;
IPDF_JSPLATFORM::Field_browse = nullptr;
IFSDK_PAUSE::version = 1;
IFSDK_PAUSE::user = nullptr;
IFSDK_PAUSE::NeedToPauseNow = Pause_NeedToPauseNow;
#if defined(OS_LINUX)
// PreviewModeClient does not know its pp::Instance.
pp::Instance* instance = client_->GetPluginInstance();
if (instance)
g_last_instance_id = instance->pp_instance();
#endif
}
PDFiumEngine::~PDFiumEngine() {
for (auto& page : pages_)
page->Unload();
if (doc_) {
FORM_DoDocumentAAction(form_, FPDFDOC_AACTION_WC);
FPDFDOC_ExitFormFillEnvironment(form_);
FPDF_CloseDocument(doc_);
}
FPDFAvail_Destroy(fpdf_availability_);
}
#if defined(PDF_ENABLE_XFA)
void PDFiumEngine::Form_EmailTo(FPDF_FORMFILLINFO* param,
FPDF_FILEHANDLER* file_handler,
FPDF_WIDESTRING to,
FPDF_WIDESTRING subject,
FPDF_WIDESTRING cc,
FPDF_WIDESTRING bcc,
FPDF_WIDESTRING message) {
std::string to_str = WideStringToString(to);
std::string subject_str = WideStringToString(subject);
std::string cc_str = WideStringToString(cc);
std::string bcc_str = WideStringToString(bcc);
std::string message_str = WideStringToString(message);
PDFiumEngine* engine = static_cast<PDFiumEngine*>(param);
engine->client_->Email(to_str, cc_str, bcc_str, subject_str, message_str);
}
void PDFiumEngine::Form_DisplayCaret(FPDF_FORMFILLINFO* param,
FPDF_PAGE page,
FPDF_BOOL visible,
double left,
double top,
double right,
double bottom) {
PDFiumEngine* engine = static_cast<PDFiumEngine*>(param);
engine->client_->UpdateCursor(PP_CURSORTYPE_IBEAM);
std::vector<pp::Rect> tickmarks;
pp::Rect rect(left, top, right, bottom);
tickmarks.push_back(rect);
engine->client_->UpdateTickMarks(tickmarks);
}
void PDFiumEngine::Form_SetCurrentPage(FPDF_FORMFILLINFO* param,
FPDF_DOCUMENT document,
int page) {
PDFiumEngine* engine = static_cast<PDFiumEngine*>(param);
pp::Rect page_view_rect = engine->GetPageContentsRect(page);
engine->ScrolledToYPosition(page_view_rect.height());
pp::Point pos(1, page_view_rect.height());
engine->SetScrollPosition(pos);
}
int PDFiumEngine::Form_GetCurrentPageIndex(FPDF_FORMFILLINFO* param,
FPDF_DOCUMENT document) {
PDFiumEngine* engine = static_cast<PDFiumEngine*>(param);
return engine->GetMostVisiblePage();
}
void PDFiumEngine::Form_GetPageViewRect(FPDF_FORMFILLINFO* param,
FPDF_PAGE page,
double* left,
double* top,
double* right,
double* bottom) {
PDFiumEngine* engine = static_cast<PDFiumEngine*>(param);
int page_index = engine->GetMostVisiblePage();
pp::Rect page_view_rect = engine->GetPageContentsRect(page_index);
*left = page_view_rect.x();
*right = page_view_rect.right();
*top = page_view_rect.y();
*bottom = page_view_rect.bottom();
}
int PDFiumEngine::Form_GetPlatform(FPDF_FORMFILLINFO* param,
void* platform,
int length) {
int platform_flag = -1;
#if defined(WIN32)
platform_flag = 0;
#elif defined(__linux__)
platform_flag = 1;
#else
platform_flag = 2;
#endif
std::string javascript =
"alert(\"Platform:" + base::DoubleToString(platform_flag) + "\")";
return platform_flag;
}
FPDF_BOOL PDFiumEngine::Form_PopupMenu(FPDF_FORMFILLINFO* param,
FPDF_PAGE page,
FPDF_WIDGET widget,
int menu_flag,
float x,
float y) {
return false;
}
FPDF_BOOL PDFiumEngine::Form_PostRequestURL(FPDF_FORMFILLINFO* param,
FPDF_WIDESTRING url,
FPDF_WIDESTRING data,
FPDF_WIDESTRING content_type,
FPDF_WIDESTRING encode,
FPDF_WIDESTRING header,
FPDF_BSTR* response) {
std::string url_str = WideStringToString(url);
std::string data_str = WideStringToString(data);
std::string content_type_str = WideStringToString(content_type);
std::string encode_str = WideStringToString(encode);
std::string header_str = WideStringToString(header);
std::string javascript = "alert(\"Post:" + url_str + "," + data_str + "," +
content_type_str + "," + encode_str + "," +
header_str + "\")";
return true;
}
FPDF_BOOL PDFiumEngine::Form_PutRequestURL(FPDF_FORMFILLINFO* param,
FPDF_WIDESTRING url,
FPDF_WIDESTRING data,
FPDF_WIDESTRING encode) {
std::string url_str = WideStringToString(url);
std::string data_str = WideStringToString(data);
std::string encode_str = WideStringToString(encode);
std::string javascript =
"alert(\"Put:" + url_str + "," + data_str + "," + encode_str + "\")";
return true;
}
void PDFiumEngine::Form_UploadTo(FPDF_FORMFILLINFO* param,
FPDF_FILEHANDLER* file_handle,
int file_flag,
FPDF_WIDESTRING to) {
std::string to_str = WideStringToString(to);
// TODO: needs the full implementation of form uploading
}
FPDF_LPFILEHANDLER PDFiumEngine::Form_DownloadFromURL(FPDF_FORMFILLINFO* param,
FPDF_WIDESTRING url) {
// NOTE: Think hard about the security implications before allowing
// a PDF file to perform this action.
return nullptr;
}
FPDF_FILEHANDLER* PDFiumEngine::Form_OpenFile(FPDF_FORMFILLINFO* param,
int file_flag,
FPDF_WIDESTRING url,
const char* mode) {
// NOTE: Think hard about the security implications before allowing
// a PDF file to perform this action.
return nullptr;
}
void PDFiumEngine::Form_GotoURL(FPDF_FORMFILLINFO* param,
FPDF_DOCUMENT document,
FPDF_WIDESTRING url) {
std::string url_str = WideStringToString(url);
// TODO: needs to implement GOTO URL action
}
int PDFiumEngine::Form_GetLanguage(FPDF_FORMFILLINFO* param,
void* language,
int length) {
return 0;
}
#endif // defined(PDF_ENABLE_XFA)
int PDFiumEngine::GetBlock(void* param,
unsigned long position,
unsigned char* buffer,
unsigned long size) {
PDFiumEngine* engine = static_cast<PDFiumEngine*>(param);
return engine->doc_loader_->GetBlock(position, size, buffer);
}
FPDF_BOOL PDFiumEngine::IsDataAvail(FX_FILEAVAIL* param,
size_t offset,
size_t size) {
auto* file_avail = static_cast<FileAvail*>(param);
return file_avail->engine->doc_loader_->IsDataAvailable(offset, size);
}
void PDFiumEngine::AddSegment(FX_DOWNLOADHINTS* param,
size_t offset,
size_t size) {
auto* download_hints = static_cast<DownloadHints*>(param);
return download_hints->engine->doc_loader_->RequestData(offset, size);
}
bool PDFiumEngine::New(const char* url, const char* headers) {
url_ = url;
if (headers)
headers_ = headers;
else
headers_.clear();
return true;
}
void PDFiumEngine::PageOffsetUpdated(const pp::Point& page_offset) {
page_offset_ = page_offset;
}
void PDFiumEngine::PluginSizeUpdated(const pp::Size& size) {
CancelPaints();
plugin_size_ = size;
CalculateVisiblePages();
}
void PDFiumEngine::ScrolledToXPosition(int position) {
CancelPaints();
int old_x = position_.x();
position_.set_x(position);
CalculateVisiblePages();
client_->Scroll(pp::Point(old_x - position, 0));
OnSelectionChanged();
}
void PDFiumEngine::ScrolledToYPosition(int position) {
CancelPaints();
int old_y = position_.y();
position_.set_y(position);
CalculateVisiblePages();
client_->Scroll(pp::Point(0, old_y - position));
OnSelectionChanged();
}
void PDFiumEngine::PrePaint() {
for (auto& paint : progressive_paints_)
paint.painted_ = false;
}
void PDFiumEngine::Paint(const pp::Rect& rect,
pp::ImageData* image_data,
std::vector<pp::Rect>* ready,
std::vector<pp::Rect>* pending) {
DCHECK(image_data);
DCHECK(ready);
DCHECK(pending);
pp::Rect leftover = rect;
for (size_t i = 0; i < visible_pages_.size(); ++i) {
int index = visible_pages_[i];
// Convert the current page's rectangle to screen rectangle. We do this
// instead of the reverse (converting the dirty rectangle from screen to
// page coordinates) because then we'd have to convert back to screen
// coordinates, and the rounding errors sometime leave pixels dirty or even
// move the text up or down a pixel when zoomed.
pp::Rect page_rect_in_screen = GetPageScreenRect(index);
pp::Rect dirty_in_screen = page_rect_in_screen.Intersect(leftover);
if (dirty_in_screen.IsEmpty())
continue;
// Compute the leftover dirty region. The first page may have blank space
// above it, in which case we also need to subtract that space from the
// dirty region.
if (i == 0) {
pp::Rect blank_space_in_screen = dirty_in_screen;
blank_space_in_screen.set_y(0);
blank_space_in_screen.set_height(dirty_in_screen.y());
leftover = leftover.Subtract(blank_space_in_screen);
}
leftover = leftover.Subtract(dirty_in_screen);
if (pages_[index]->available()) {
int progressive = GetProgressiveIndex(index);
if (progressive != -1) {
DCHECK_GE(progressive, 0);
DCHECK_LT(static_cast<size_t>(progressive), progressive_paints_.size());
if (progressive_paints_[progressive].rect != dirty_in_screen) {
// The PDFium code can only handle one progressive paint at a time, so
// queue this up. Previously we used to merge the rects when this
// happened, but it made scrolling up on complex PDFs very slow since
// there would be a damaged rect at the top (from scroll) and at the
// bottom (from toolbar).
pending->push_back(dirty_in_screen);
continue;
}
}
if (progressive == -1) {
progressive = StartPaint(index, dirty_in_screen);
progressive_paint_timeout_ = kMaxInitialProgressivePaintTime;
} else {
progressive_paint_timeout_ = kMaxProgressivePaintTime;
}
progressive_paints_[progressive].painted_ = true;
if (ContinuePaint(progressive, image_data)) {
FinishPaint(progressive, image_data);
ready->push_back(dirty_in_screen);
} else {
pending->push_back(dirty_in_screen);
}
} else {
PaintUnavailablePage(index, dirty_in_screen, image_data);
ready->push_back(dirty_in_screen);
}
}
}
void PDFiumEngine::PostPaint() {
for (size_t i = 0; i < progressive_paints_.size(); ++i) {
if (progressive_paints_[i].painted_)
continue;
// This rectangle must have been merged with another one, that's why we
// weren't asked to paint it. Remove it or otherwise we'll never finish
// painting.
FPDF_RenderPage_Close(pages_[progressive_paints_[i].page_index]->GetPage());
FPDFBitmap_Destroy(progressive_paints_[i].bitmap);
progressive_paints_.erase(progressive_paints_.begin() + i);
--i;
}
}
bool PDFiumEngine::HandleDocumentLoad(const pp::URLLoader& loader) {
password_tries_remaining_ = kMaxPasswordTries;
process_when_pending_request_complete_ = true;
auto loader_wrapper =
std::make_unique<URLLoaderWrapperImpl>(GetPluginInstance(), loader);
loader_wrapper->SetResponseHeaders(headers_);
doc_loader_ = std::make_unique<DocumentLoader>(this);
if (doc_loader_->Init(std::move(loader_wrapper), url_)) {
// request initial data.
doc_loader_->RequestData(0, 1);
return true;
}
return false;
}
pp::Instance* PDFiumEngine::GetPluginInstance() {
return client_->GetPluginInstance();
}
std::unique_ptr<URLLoaderWrapper> PDFiumEngine::CreateURLLoader() {
return std::make_unique<URLLoaderWrapperImpl>(GetPluginInstance(),
client_->CreateURLLoader());
}
void PDFiumEngine::AppendPage(PDFEngine* engine, int index) {
// Unload and delete the blank page before appending.
pages_[index]->Unload();
pages_[index]->set_calculated_links(false);
pp::Size curr_page_size = GetPageSize(index);
FPDFPage_Delete(doc_, index);
FPDF_ImportPages(doc_, static_cast<PDFiumEngine*>(engine)->doc(), "1", index);
pp::Size new_page_size = GetPageSize(index);
if (curr_page_size != new_page_size)
LoadPageInfo(true);
client_->Invalidate(GetPageScreenRect(index));
}
#if defined(PDF_ENABLE_XFA)
void PDFiumEngine::SetScrollPosition(const pp::Point& position) {
position_ = position;
}
#endif
std::string PDFiumEngine::GetMetadata(const std::string& key) {
return GetDocumentMetadata(doc(), key);
}
void PDFiumEngine::OnPendingRequestComplete() {
if (!process_when_pending_request_complete_)
return;
if (!fpdf_availability_) {
file_access_.m_FileLen = doc_loader_->GetDocumentSize();
fpdf_availability_ = FPDFAvail_Create(&file_availability_, &file_access_);
DCHECK(fpdf_availability_);
// Currently engine does not deal efficiently with some non-linearized
// files.
// See http://code.google.com/p/chromium/issues/detail?id=59400
// To improve user experience we download entire file for non-linearized
// PDF.
if (FPDFAvail_IsLinearized(fpdf_availability_) != PDF_LINEARIZED) {
// Wait complete document.
process_when_pending_request_complete_ = false;
FPDFAvail_Destroy(fpdf_availability_);
fpdf_availability_ = nullptr;
return;
}
}
if (!doc_) {
LoadDocument();
return;
}
if (pages_.empty()) {
LoadBody();
return;
}
// LoadDocument() will result in |pending_pages_| being reset so there's no
// need to run the code below in that case.
bool update_pages = false;
std::vector<int> still_pending;
for (int pending_page : pending_pages_) {
if (CheckPageAvailable(pending_page, &still_pending)) {
update_pages = true;
if (IsPageVisible(pending_page))
client_->Invalidate(GetPageScreenRect(pending_page));
}
}
pending_pages_.swap(still_pending);
if (update_pages)
LoadPageInfo(true);
}
void PDFiumEngine::OnNewDataReceived() {
client_->DocumentLoadProgress(doc_loader_->count_of_bytes_received(),
doc_loader_->GetDocumentSize());
}
void PDFiumEngine::OnDocumentComplete() {
if (doc_) {
return FinishLoadingDocument();
}
file_access_.m_FileLen = doc_loader_->GetDocumentSize();
if (!fpdf_availability_) {
fpdf_availability_ = FPDFAvail_Create(&file_availability_, &file_access_);
DCHECK(fpdf_availability_);
}
LoadDocument();
}
void PDFiumEngine::OnDocumentCanceled() {
if (visible_pages_.empty())
client_->DocumentLoadFailed();
else
OnDocumentComplete();
}
void PDFiumEngine::CancelBrowserDownload() {
client_->CancelBrowserDownload();
}
void PDFiumEngine::FinishLoadingDocument() {
DCHECK(doc_loader_->IsDocumentComplete() && doc_);
LoadBody();
bool need_update = false;
for (size_t i = 0; i < pages_.size(); ++i) {
if (pages_[i]->available())
continue;
pages_[i]->set_available(true);
// We still need to call IsPageAvail() even if the whole document is
// already downloaded.
FPDFAvail_IsPageAvail(fpdf_availability_, i, &download_hints_);
need_update = true;
if (IsPageVisible(i))
client_->Invalidate(GetPageScreenRect(i));
}
if (need_update)
LoadPageInfo(true);
if (called_do_document_action_)
return;
called_do_document_action_ = true;
// These can only be called now, as the JS might end up needing a page.
FORM_DoDocumentJSAction(form_);
FORM_DoDocumentOpenAction(form_);
if (most_visible_page_ != -1) {
FPDF_PAGE new_page = pages_[most_visible_page_]->GetPage();
FORM_DoPageAAction(new_page, form_, FPDFPAGE_AACTION_OPEN);
}
if (doc_) {
DocumentFeatures document_features;
document_features.page_count = pages_.size();
document_features.has_attachments = (FPDFDoc_GetAttachmentCount(doc_) > 0);
document_features.is_linearized =
(FPDFAvail_IsLinearized(fpdf_availability_) == PDF_LINEARIZED);
document_features.is_tagged = FPDFCatalog_IsTagged(doc_);
document_features.form_type = static_cast<FormType>(FPDF_GetFormType(doc_));
client_->DocumentLoadComplete(document_features);
}
}
void PDFiumEngine::UnsupportedFeature(int type) {
std::string feature;
switch (type) {
#if !defined(PDF_ENABLE_XFA)
case FPDF_UNSP_DOC_XFAFORM:
feature = "XFA";
break;
#endif
case FPDF_UNSP_DOC_PORTABLECOLLECTION:
feature = "Portfolios_Packages";
break;
case FPDF_UNSP_DOC_ATTACHMENT:
case FPDF_UNSP_ANNOT_ATTACHMENT:
feature = "Attachment";
break;
case FPDF_UNSP_DOC_SECURITY:
feature = "Rights_Management";
break;
case FPDF_UNSP_DOC_SHAREDREVIEW:
feature = "Shared_Review";
break;
case FPDF_UNSP_DOC_SHAREDFORM_ACROBAT:
case FPDF_UNSP_DOC_SHAREDFORM_FILESYSTEM:
case FPDF_UNSP_DOC_SHAREDFORM_EMAIL:
feature = "Shared_Form";
break;
case FPDF_UNSP_ANNOT_3DANNOT:
feature = "3D";
break;
case FPDF_UNSP_ANNOT_MOVIE:
feature = "Movie";
break;
case FPDF_UNSP_ANNOT_SOUND:
feature = "Sound";
break;
case FPDF_UNSP_ANNOT_SCREEN_MEDIA:
case FPDF_UNSP_ANNOT_SCREEN_RICHMEDIA:
feature = "Screen";
break;
case FPDF_UNSP_ANNOT_SIG:
feature = "Digital_Signature";
break;
}
client_->DocumentHasUnsupportedFeature(feature);
}
void PDFiumEngine::FontSubstituted() {
client_->FontSubstituted();
}
void PDFiumEngine::ContinueFind(int32_t result) {
StartFind(current_find_text_, result != 0);
}
bool PDFiumEngine::HandleEvent(const pp::InputEvent& event) {
DCHECK(!defer_page_unload_);
defer_page_unload_ = true;
bool rv = false;
switch (event.GetType()) {
case PP_INPUTEVENT_TYPE_MOUSEDOWN:
rv = OnMouseDown(pp::MouseInputEvent(event));
break;
case PP_INPUTEVENT_TYPE_MOUSEUP:
rv = OnMouseUp(pp::MouseInputEvent(event));
break;
case PP_INPUTEVENT_TYPE_MOUSEMOVE:
rv = OnMouseMove(pp::MouseInputEvent(event));
break;
case PP_INPUTEVENT_TYPE_KEYDOWN:
rv = OnKeyDown(pp::KeyboardInputEvent(event));
break;
case PP_INPUTEVENT_TYPE_KEYUP:
rv = OnKeyUp(pp::KeyboardInputEvent(event));
break;
case PP_INPUTEVENT_TYPE_CHAR:
rv = OnChar(pp::KeyboardInputEvent(event));
break;
case PP_INPUTEVENT_TYPE_TOUCHSTART: {
KillTouchTimer(next_touch_timer_id_);
pp::TouchInputEvent touch_event(event);
if (touch_event.GetTouchCount(PP_TOUCHLIST_TYPE_TARGETTOUCHES) == 1)
ScheduleTouchTimer(touch_event);
break;
}
case PP_INPUTEVENT_TYPE_TOUCHEND:
KillTouchTimer(next_touch_timer_id_);
break;
case PP_INPUTEVENT_TYPE_TOUCHMOVE:
// TODO(dsinclair): This should allow a little bit of movement (up to the
// touch radii) to account for finger jiggle.
KillTouchTimer(next_touch_timer_id_);
default:
break;
}
DCHECK(defer_page_unload_);
defer_page_unload_ = false;
for (int page_index : deferred_page_unloads_)
pages_[page_index]->Unload();
deferred_page_unloads_.clear();
return rv;
}
uint32_t PDFiumEngine::QuerySupportedPrintOutputFormats() {
if (HasPermission(PERMISSION_PRINT_HIGH_QUALITY))
return PP_PRINTOUTPUTFORMAT_PDF | PP_PRINTOUTPUTFORMAT_RASTER;
if (HasPermission(PERMISSION_PRINT_LOW_QUALITY))
return PP_PRINTOUTPUTFORMAT_RASTER;
return 0;
}
void PDFiumEngine::PrintBegin() {
FORM_DoDocumentAAction(form_, FPDFDOC_AACTION_WP);
}
pp::Resource PDFiumEngine::PrintPages(
const PP_PrintPageNumberRange_Dev* page_ranges,
uint32_t page_range_count,
const PP_PrintSettings_Dev& print_settings) {
ScopedSubstFont scoped_subst_font(this);
if ((print_settings.format & PP_PRINTOUTPUTFORMAT_PDF) &&
HasPermission(PERMISSION_PRINT_HIGH_QUALITY)) {
return PrintPagesAsPDF(page_ranges, page_range_count, print_settings);
}
if (HasPermission(PERMISSION_PRINT_LOW_QUALITY))
return PrintPagesAsRasterPDF(page_ranges, page_range_count, print_settings);
return pp::Resource();
}
FPDF_DOCUMENT PDFiumEngine::CreateSinglePageRasterPdf(
double source_page_width,
double source_page_height,
const PP_PrintSettings_Dev& print_settings,
PDFiumPage* page_to_print) {
FPDF_DOCUMENT temp_doc = FPDF_CreateNewDocument();
if (!temp_doc)
return temp_doc;
const pp::Size& bitmap_size(page_to_print->rect().size());
FPDF_PAGE temp_page =
FPDFPage_New(temp_doc, 0, source_page_width, source_page_height);
pp::ImageData image =
pp::ImageData(client_->GetPluginInstance(),
PP_IMAGEDATAFORMAT_BGRA_PREMUL, bitmap_size, false);
FPDF_BITMAP bitmap =
FPDFBitmap_CreateEx(bitmap_size.width(), bitmap_size.height(),
FPDFBitmap_BGRx, image.data(), image.stride());
// Clear the bitmap
FPDFBitmap_FillRect(bitmap, 0, 0, bitmap_size.width(), bitmap_size.height(),
0xFFFFFFFF);
pp::Rect page_rect = page_to_print->rect();
FPDF_RenderPageBitmap(bitmap, page_to_print->GetPrintPage(), page_rect.x(),
page_rect.y(), page_rect.width(), page_rect.height(),
print_settings.orientation,
FPDF_ANNOT | FPDF_PRINTING | FPDF_NO_CATCH);
unsigned char* bitmap_data =
static_cast<unsigned char*>(FPDFBitmap_GetBuffer(bitmap));
double ratio_x = ConvertUnitDouble(bitmap_size.width(), print_settings.dpi,
kPointsPerInch);
double ratio_y = ConvertUnitDouble(bitmap_size.height(), print_settings.dpi,
kPointsPerInch);
// Add the bitmap to an image object and add the image object to the output
// page.
FPDF_PAGEOBJECT temp_img = FPDFPageObj_NewImageObj(temp_doc);
bool encoded = false;
std::vector<uint8_t> compressed_bitmap_data;
if (!(print_settings.format & PP_PRINTOUTPUTFORMAT_PDF)) {
// Use quality = 40 as this does not significantly degrade the printed
// document relative to a normal bitmap and provides better compression than
// a higher quality setting.
const int kQuality = 40;
SkImageInfo info = SkImageInfo::Make(
FPDFBitmap_GetWidth(bitmap), FPDFBitmap_GetHeight(bitmap),
kBGRA_8888_SkColorType, kOpaque_SkAlphaType);
SkPixmap src(info, bitmap_data, FPDFBitmap_GetStride(bitmap));
encoded = gfx::JPEGCodec::Encode(src, kQuality, &compressed_bitmap_data);
}
if (encoded) {
FPDF_FILEACCESS file_access = {};
file_access.m_FileLen =
static_cast<unsigned long>(compressed_bitmap_data.size());
file_access.m_GetBlock = &GetBlockForJpeg;
file_access.m_Param = &compressed_bitmap_data;
FPDFImageObj_LoadJpegFileInline(&temp_page, 1, temp_img, &file_access);
} else {
FPDFImageObj_SetBitmap(&temp_page, 1, temp_img, bitmap);
}
FPDFImageObj_SetMatrix(temp_img, ratio_x, 0, 0, ratio_y, 0, 0);
FPDFPage_InsertObject(temp_page, temp_img);
FPDFPage_GenerateContent(temp_page);
FPDF_ClosePage(temp_page);
page_to_print->ClosePrintPage();
FPDFBitmap_Destroy(bitmap);
return temp_doc;
}
pp::Buffer_Dev PDFiumEngine::PrintPagesAsRasterPDF(
const PP_PrintPageNumberRange_Dev* page_ranges,
uint32_t page_range_count,
const PP_PrintSettings_Dev& print_settings) {
if (!page_range_count)
return pp::Buffer_Dev();
// If document is not downloaded yet, disable printing.
if (doc_ && !doc_loader_->IsDocumentComplete())
return pp::Buffer_Dev();
FPDF_DOCUMENT output_doc = FPDF_CreateNewDocument();
if (!output_doc)
return pp::Buffer_Dev();
SaveSelectedFormForPrint();
std::vector<PDFiumPage> pages_to_print;
// width and height of source PDF pages.
std::vector<std::pair<double, double>> source_page_sizes;
// Collect pages to print and sizes of source pages.
std::vector<uint32_t> page_numbers =
GetPageNumbersFromPrintPageNumberRange(page_ranges, page_range_count);
for (uint32_t page_number : page_numbers) {
FPDF_PAGE pdf_page = FPDF_LoadPage(doc_, page_number);
double source_page_width = FPDF_GetPageWidth(pdf_page);
double source_page_height = FPDF_GetPageHeight(pdf_page);
source_page_sizes.push_back(
std::make_pair(source_page_width, source_page_height));
int width_in_pixels =
ConvertUnit(source_page_width, kPointsPerInch, print_settings.dpi);
int height_in_pixels =
ConvertUnit(source_page_height, kPointsPerInch, print_settings.dpi);
pp::Rect rect(width_in_pixels, height_in_pixels);
pages_to_print.push_back(PDFiumPage(this, page_number, rect, true));
FPDF_ClosePage(pdf_page);
}
#if defined(OS_LINUX)
g_last_instance_id = client_->GetPluginInstance()->pp_instance();
#endif
size_t i = 0;
for (; i < pages_to_print.size(); ++i) {
double source_page_width = source_page_sizes[i].first;
double source_page_height = source_page_sizes[i].second;
// Use temp_doc to compress image by saving PDF to buffer.
FPDF_DOCUMENT temp_doc =
CreateSinglePageRasterPdf(source_page_width, source_page_height,
print_settings, &pages_to_print[i]);
if (!temp_doc)
break;
pp::Buffer_Dev buffer = GetFlattenedPrintData(temp_doc);
FPDF_CloseDocument(temp_doc);
PDFiumMemBufferFileRead file_read(buffer.data(), buffer.size());
temp_doc = FPDF_LoadCustomDocument(&file_read, nullptr);
FPDF_BOOL imported = FPDF_ImportPages(output_doc, temp_doc, "1", i);
FPDF_CloseDocument(temp_doc);
if (!imported)
break;
}
pp::Buffer_Dev buffer;
if (i == pages_to_print.size()) {
FPDF_CopyViewerPreferences(output_doc, doc_);
FitContentsToPrintableAreaIfRequired(output_doc, print_settings);
// Now flatten all the output pages.
buffer = GetFlattenedPrintData(output_doc);
}
FPDF_CloseDocument(output_doc);
return buffer;
}
pp::Buffer_Dev PDFiumEngine::GetFlattenedPrintData(FPDF_DOCUMENT doc) {
pp::Buffer_Dev buffer;
ScopedSubstFont scoped_subst_font(this);
int page_count = FPDF_GetPageCount(doc);
for (int i = 0; i < page_count; ++i) {
FPDF_PAGE page = FPDF_LoadPage(doc, i);
DCHECK(page);
int flatten_ret = FPDFPage_Flatten(page, FLAT_PRINT);
FPDF_ClosePage(page);
if (flatten_ret == FLATTEN_FAIL)
return buffer;
}
PDFiumMemBufferFileWrite output_file_write;
if (FPDF_SaveAsCopy(doc, &output_file_write, 0)) {
size_t size = output_file_write.size();
buffer = pp::Buffer_Dev(client_->GetPluginInstance(), size);
if (!buffer.is_null())
memcpy(buffer.data(), output_file_write.buffer().c_str(), size);
}
return buffer;
}
pp::Buffer_Dev PDFiumEngine::PrintPagesAsPDF(
const PP_PrintPageNumberRange_Dev* page_ranges,
uint32_t page_range_count,
const PP_PrintSettings_Dev& print_settings) {
if (!page_range_count)
return pp::Buffer_Dev();
DCHECK(doc_);
FPDF_DOCUMENT output_doc = FPDF_CreateNewDocument();
if (!output_doc)
return pp::Buffer_Dev();
SaveSelectedFormForPrint();
std::string page_number_str;
for (uint32_t index = 0; index < page_range_count; ++index) {
if (!page_number_str.empty())
page_number_str.append(",");
const PP_PrintPageNumberRange_Dev& range = page_ranges[index];
page_number_str.append(base::UintToString(range.first_page_number + 1));
if (range.first_page_number != range.last_page_number) {
page_number_str.append("-");
page_number_str.append(base::UintToString(range.last_page_number + 1));
}
}
std::vector<uint32_t> page_numbers =
GetPageNumbersFromPrintPageNumberRange(page_ranges, page_range_count);
for (uint32_t page_number : page_numbers) {
pages_[page_number]->GetPage();
if (!IsPageVisible(page_number))
pages_[page_number]->Unload();
}
FPDF_CopyViewerPreferences(output_doc, doc_);
if (!FPDF_ImportPages(output_doc, doc_, page_number_str.c_str(), 0)) {
FPDF_CloseDocument(output_doc);
return pp::Buffer_Dev();
}
FitContentsToPrintableAreaIfRequired(output_doc, print_settings);
// Now flatten all the output pages.
pp::Buffer_Dev buffer = GetFlattenedPrintData(output_doc);
FPDF_CloseDocument(output_doc);
return buffer;
}
void PDFiumEngine::FitContentsToPrintableAreaIfRequired(
FPDF_DOCUMENT doc,
const PP_PrintSettings_Dev& print_settings) {
// Check to see if we need to fit pdf contents to printer paper size.
if (print_settings.print_scaling_option !=
PP_PRINTSCALINGOPTION_SOURCE_SIZE) {
int num_pages = FPDF_GetPageCount(doc);
// In-place transformation is more efficient than creating a new
// transformed document from the source document. Therefore, transform
// every page to fit the contents in the selected printer paper.
for (int i = 0; i < num_pages; ++i) {
FPDF_PAGE page = FPDF_LoadPage(doc, i);
TransformPDFPageForPrinting(page, print_settings);
FPDF_ClosePage(page);
}
}
}
void PDFiumEngine::SaveSelectedFormForPrint() {
FORM_ForceToKillFocus(form_);
SetInFormTextArea(false);
}
void PDFiumEngine::SetFormSelectedText(FPDF_FORMHANDLE form_handle,
FPDF_PAGE page) {
unsigned long form_sel_text_len =
FORM_GetSelectedText(form_handle, page, nullptr, 0);
// If form selected text is empty and there was no previous form text
// selection, exit early because nothing has changed. When |form_sel_text_len|
// is 2, that represents a wide string with just a NUL-terminator.
if (form_sel_text_len <= 2 && selected_form_text_.empty())
return;
base::string16 selected_form_text16;
PDFiumAPIStringBufferSizeInBytesAdapter<base::string16> string_adapter(
&selected_form_text16, form_sel_text_len, false);
string_adapter.Close(FORM_GetSelectedText(
form_handle, page, string_adapter.GetData(), form_sel_text_len));
// Update previous and current selections, then compare them to check if
// selection has changed. If so, set plugin text selection.
std::string selected_form_text = selected_form_text_;
selected_form_text_ = base::UTF16ToUTF8(selected_form_text16);
if (selected_form_text != selected_form_text_) {
DCHECK(in_form_text_area_);
pp::PDF::SetSelectedText(GetPluginInstance(), selected_form_text_.c_str());
}
}
void PDFiumEngine::PrintEnd() {
FORM_DoDocumentAAction(form_, FPDFDOC_AACTION_DP);
}
PDFiumPage::Area PDFiumEngine::GetCharIndex(const pp::Point& point,
int* page_index,
int* char_index,
int* form_type,
PDFiumPage::LinkTarget* target) {
int page = -1;
pp::Point point_in_page(
static_cast<int>((point.x() + position_.x()) / current_zoom_),
static_cast<int>((point.y() + position_.y()) / current_zoom_));
for (int visible_page : visible_pages_) {
if (pages_[visible_page]->rect().Contains(point_in_page)) {
page = visible_page;
break;
}
}
if (page == -1)
return PDFiumPage::NONSELECTABLE_AREA;
// If the page hasn't finished rendering, calling into the page sometimes
// leads to hangs.
for (const auto& paint : progressive_paints_) {
if (paint.page_index == page)
return PDFiumPage::NONSELECTABLE_AREA;
}
*page_index = page;
PDFiumPage::Area result = pages_[page]->GetCharIndex(
point_in_page, current_rotation_, char_index, form_type, target);
return (client_->IsPrintPreview() && result == PDFiumPage::WEBLINK_AREA)
? PDFiumPage::NONSELECTABLE_AREA
: result;
}
bool PDFiumEngine::OnMouseDown(const pp::MouseInputEvent& event) {
pp::MouseInputEvent normalized_event =
NormalizeMouseEvent(client_->GetPluginInstance(), event);
if (normalized_event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_LEFT)
return OnLeftMouseDown(normalized_event);
if (normalized_event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_MIDDLE)
return OnMiddleMouseDown(normalized_event);
if (normalized_event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_RIGHT)
return OnRightMouseDown(normalized_event);
return false;
}
void PDFiumEngine::OnSingleClick(int page_index, int char_index) {
SetSelecting(true);
selection_.push_back(PDFiumRange(pages_[page_index].get(), char_index, 0));
}
void PDFiumEngine::OnMultipleClick(int click_count,
int page_index,
int char_index) {
DCHECK_GE(click_count, 2);
bool is_double_click = click_count == 2;
// It would be more efficient if the SDK could support finding a space, but
// now it doesn't.
int start_index = char_index;
do {
base::char16 cur = pages_[page_index]->GetCharAtIndex(start_index);
if (FindMultipleClickBoundary(is_double_click, cur))
break;
} while (--start_index >= 0);
if (start_index)
start_index++;
int end_index = char_index;
int total = pages_[page_index]->GetCharCount();
while (end_index++ <= total) {
base::char16 cur = pages_[page_index]->GetCharAtIndex(end_index);
if (FindMultipleClickBoundary(is_double_click, cur))
break;
}
selection_.push_back(PDFiumRange(pages_[page_index].get(), start_index,
end_index - start_index));
}
bool PDFiumEngine::OnLeftMouseDown(const pp::MouseInputEvent& event) {
SetMouseLeftButtonDown(true);
auto selection_invalidator =
std::make_unique<SelectionChangeInvalidator>(this);
selection_.clear();
int page_index = -1;
int char_index = -1;
int form_type = FPDF_FORMFIELD_UNKNOWN;
PDFiumPage::LinkTarget target;
pp::Point point = event.GetPosition();
PDFiumPage::Area area =
GetCharIndex(point, &page_index, &char_index, &form_type, &target);
DCHECK_GE(form_type, FPDF_FORMFIELD_UNKNOWN);
mouse_down_state_.Set(area, target);
// Decide whether to open link or not based on user action in mouse up and
// mouse move events.
if (IsLinkArea(area))
return true;
if (page_index != -1) {
last_page_mouse_down_ = page_index;
double page_x;
double page_y;
DeviceToPage(page_index, point.x(), point.y(), &page_x, &page_y);
bool is_form_text_area = IsFormTextArea(area, form_type);
FPDF_PAGE page = pages_[page_index]->GetPage();
bool is_editable_form_text_area =
is_form_text_area &&
IsPointInEditableFormTextArea(page, page_x, page_y, form_type);
FORM_OnLButtonDown(form_, page, 0, page_x, page_y);
if (form_type != FPDF_FORMFIELD_UNKNOWN) {
// Destroy SelectionChangeInvalidator object before SetInFormTextArea()
// changes plugin's focus to be in form text area. This way, regular text
// selection can be cleared when a user clicks into a form text area
// because the pp::PDF::SetSelectedText() call in
// ~SelectionChangeInvalidator() still goes to the Mimehandler
// (not the Renderer).
selection_invalidator.reset();
SetInFormTextArea(is_form_text_area);
editable_form_text_area_ = is_editable_form_text_area;
return true; // Return now before we get into the selection code.
}
}
SetInFormTextArea(false);
if (area != PDFiumPage::TEXT_AREA)
return true; // Return true so WebKit doesn't do its own highlighting.
if (event.GetClickCount() == 1)
OnSingleClick(page_index, char_index);
else if (event.GetClickCount() == 2 || event.GetClickCount() == 3)
OnMultipleClick(event.GetClickCount(), page_index, char_index);
return true;
}
bool PDFiumEngine::OnMiddleMouseDown(const pp::MouseInputEvent& event) {
SetMouseLeftButtonDown(false);
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
int unused_page_index = -1;
int unused_char_index = -1;
int unused_form_type = FPDF_FORMFIELD_UNKNOWN;
PDFiumPage::LinkTarget target;
PDFiumPage::Area area =
GetCharIndex(event.GetPosition(), &unused_page_index, &unused_char_index,
&unused_form_type, &target);
mouse_down_state_.Set(area, target);
// Decide whether to open link or not based on user action in mouse up and
// mouse move events.
if (IsLinkArea(area))
return true;
// Prevent middle mouse button from selecting texts.
return false;
}
bool PDFiumEngine::OnRightMouseDown(const pp::MouseInputEvent& event) {
DCHECK_EQ(PP_INPUTEVENT_MOUSEBUTTON_RIGHT, event.GetButton());
pp::Point point = event.GetPosition();
int page_index = -1;
int char_index = -1;
int form_type = FPDF_FORMFIELD_UNKNOWN;
PDFiumPage::LinkTarget target;
PDFiumPage::Area area =
GetCharIndex(point, &page_index, &char_index, &form_type, &target);
DCHECK_GE(form_type, FPDF_FORMFIELD_UNKNOWN);
bool is_form_text_area = IsFormTextArea(area, form_type);
bool is_editable_form_text_area = false;
double page_x = -1;
double page_y = -1;
FPDF_PAGE page = nullptr;
if (is_form_text_area) {
DCHECK_NE(page_index, -1);
DeviceToPage(page_index, point.x(), point.y(), &page_x, &page_y);
page = pages_[page_index]->GetPage();
is_editable_form_text_area =
IsPointInEditableFormTextArea(page, page_x, page_y, form_type);
}
// Handle the case when focus starts inside a form text area.
if (in_form_text_area_) {
if (is_form_text_area) {
FORM_OnFocus(form_, page, 0, page_x, page_y);
} else {
// Transition out of a form text area.
FORM_ForceToKillFocus(form_);
SetInFormTextArea(false);
}
return true;
}
// Handle the case when focus starts outside a form text area and transitions
// into a form text area.
if (is_form_text_area) {
{
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
}
SetInFormTextArea(true);
editable_form_text_area_ = is_editable_form_text_area;
FORM_OnFocus(form_, page, 0, page_x, page_y);
return true;
}
// Handle the case when focus starts outside a form text area and stays
// outside.
if (selection_.empty())
return false;
std::vector<pp::Rect> selection_rect_vector;
GetAllScreenRectsUnion(&selection_, GetVisibleRect().point(),
&selection_rect_vector);
for (const auto& rect : selection_rect_vector) {
if (rect.Contains(point.x(), point.y()))
return false;
}
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
return true;
}
bool PDFiumEngine::OnMouseUp(const pp::MouseInputEvent& event) {
if (event.GetButton() != PP_INPUTEVENT_MOUSEBUTTON_LEFT &&
event.GetButton() != PP_INPUTEVENT_MOUSEBUTTON_MIDDLE) {
return false;
}
if (event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_LEFT)
SetMouseLeftButtonDown(false);
int page_index = -1;
int char_index = -1;
int form_type = FPDF_FORMFIELD_UNKNOWN;
PDFiumPage::LinkTarget target;
pp::Point point = event.GetPosition();
PDFiumPage::Area area =
GetCharIndex(point, &page_index, &char_index, &form_type, &target);
// Open link on mouse up for same link for which mouse down happened earlier.
if (mouse_down_state_.Matches(area, target)) {
if (area == PDFiumPage::WEBLINK_AREA) {
uint32_t modifiers = event.GetModifiers();
bool middle_button =
!!(modifiers & PP_INPUTEVENT_MODIFIER_MIDDLEBUTTONDOWN);
bool alt_key = !!(modifiers & PP_INPUTEVENT_MODIFIER_ALTKEY);
bool ctrl_key = !!(modifiers & PP_INPUTEVENT_MODIFIER_CONTROLKEY);
bool meta_key = !!(modifiers & PP_INPUTEVENT_MODIFIER_METAKEY);
bool shift_key = !!(modifiers & PP_INPUTEVENT_MODIFIER_SHIFTKEY);
WindowOpenDisposition disposition = ui::DispositionFromClick(
middle_button, alt_key, ctrl_key, meta_key, shift_key);
client_->NavigateTo(target.url, disposition);
SetInFormTextArea(false);
return true;
}
if (area == PDFiumPage::DOCLINK_AREA) {
pp::Rect page_rect(GetPageScreenRect(target.page));
int y = position_.y() + page_rect.y();
if (target.y_in_pixels)
y += target.y_in_pixels.value() * current_zoom_;
client_->ScrollToY(y, /*compensate_for_toolbar=*/true);
SetInFormTextArea(false);
return true;
}
}
// Prevent middle mouse button from selecting texts.
if (event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_MIDDLE)
return false;
if (page_index != -1) {
double page_x;
double page_y;
DeviceToPage(page_index, point.x(), point.y(), &page_x, &page_y);
FORM_OnLButtonUp(form_, pages_[page_index]->GetPage(), 0, page_x, page_y);
}
if (!selecting_)
return false;
SetSelecting(false);
return true;
}
bool PDFiumEngine::OnMouseMove(const pp::MouseInputEvent& event) {
int page_index = -1;
int char_index = -1;
int form_type = FPDF_FORMFIELD_UNKNOWN;
PDFiumPage::LinkTarget target;
pp::Point point = event.GetPosition();
PDFiumPage::Area area =
GetCharIndex(point, &page_index, &char_index, &form_type, &target);
// Clear |mouse_down_state_| if mouse moves away from where the mouse down
// happened.
if (!mouse_down_state_.Matches(area, target))
mouse_down_state_.Reset();
if (!selecting_) {
PP_CursorType_Dev cursor;
switch (area) {
case PDFiumPage::TEXT_AREA:
cursor = PP_CURSORTYPE_IBEAM;
break;
case PDFiumPage::WEBLINK_AREA:
case PDFiumPage::DOCLINK_AREA:
cursor = PP_CURSORTYPE_HAND;
break;
case PDFiumPage::NONSELECTABLE_AREA:
case PDFiumPage::FORM_TEXT_AREA:
default:
switch (form_type) {
case FPDF_FORMFIELD_PUSHBUTTON:
case FPDF_FORMFIELD_CHECKBOX:
case FPDF_FORMFIELD_RADIOBUTTON:
case FPDF_FORMFIELD_COMBOBOX:
case FPDF_FORMFIELD_LISTBOX:
cursor = PP_CURSORTYPE_HAND;
break;
case FPDF_FORMFIELD_TEXTFIELD:
cursor = PP_CURSORTYPE_IBEAM;
break;
default:
cursor = PP_CURSORTYPE_POINTER;
break;
}
break;
}
if (page_index != -1) {
double page_x;
double page_y;
DeviceToPage(page_index, point.x(), point.y(), &page_x, &page_y);
FORM_OnMouseMove(form_, pages_[page_index]->GetPage(), 0, page_x, page_y);
}
client_->UpdateCursor(cursor);
std::string url = GetLinkAtPosition(event.GetPosition());
if (url != link_under_cursor_) {
link_under_cursor_ = url;
pp::PDF::SetLinkUnderCursor(GetPluginInstance(), url.c_str());
}
// If in form text area while left mouse button is held down, check if form
// text selection needs to be updated.
if (mouse_left_button_down_ && area == PDFiumPage::FORM_TEXT_AREA &&
last_page_mouse_down_ != -1) {
SetFormSelectedText(form_, pages_[last_page_mouse_down_]->GetPage());
}
// No need to swallow the event, since this might interfere with the
// scrollbars if the user is dragging them.
return false;
}
// We're selecting but right now we're not over text, so don't change the
// current selection.
if (area != PDFiumPage::TEXT_AREA && !IsLinkArea(area))
return false;
SelectionChangeInvalidator selection_invalidator(this);
return ExtendSelection(page_index, char_index);
}
bool PDFiumEngine::ExtendSelection(int page_index, int char_index) {
// Check if the user has decreased their selection area and we need to remove
// pages from |selection_|.
for (size_t i = 0; i < selection_.size(); ++i) {
if (selection_[i].page_index() == page_index) {
// There should be no other pages after this.
selection_.erase(selection_.begin() + i + 1, selection_.end());
break;
}
}
if (selection_.empty())
return false;
PDFiumRange& last_selection = selection_.back();
const int last_page_index = last_selection.page_index();
const int last_char_index = last_selection.char_index();
if (last_page_index == page_index) {
// Selecting within a page.
int count = char_index - last_char_index;
if (count >= 0) {
// Selecting forward.
++count;
} else {
--count;
}
last_selection.SetCharCount(count);
} else if (last_page_index < page_index) {
// Selecting into the next page.
// First make sure that there are no gaps in selection, i.e. if mousedown on
// page one but we only get mousemove over page three, we want page two.
for (int i = last_page_index + 1; i < page_index; ++i) {
selection_.push_back(
PDFiumRange(pages_[i].get(), 0, pages_[i]->GetCharCount()));
}
int count = pages_[last_page_index]->GetCharCount();
last_selection.SetCharCount(count - last_char_index);
selection_.push_back(PDFiumRange(pages_[page_index].get(), 0, char_index));
} else {
// Selecting into the previous page.
// The selection's char_index is 0-based, so the character count is one
// more than the index. The character count needs to be negative to
// indicate a backwards selection.
last_selection.SetCharCount(-last_char_index - 1);
// First make sure that there are no gaps in selection, i.e. if mousedown on
// page three but we only get mousemove over page one, we want page two.
for (int i = last_page_index - 1; i > page_index; --i) {
selection_.push_back(
PDFiumRange(pages_[i].get(), 0, pages_[i]->GetCharCount()));
}
int count = pages_[page_index]->GetCharCount();
selection_.push_back(
PDFiumRange(pages_[page_index].get(), count, count - char_index));
}
return true;
}
bool PDFiumEngine::OnKeyDown(const pp::KeyboardInputEvent& event) {
if (last_page_mouse_down_ == -1)
return false;
bool rv = !!FORM_OnKeyDown(form_, pages_[last_page_mouse_down_]->GetPage(),
event.GetKeyCode(), event.GetModifiers());
if (event.GetKeyCode() == ui::VKEY_BACK ||
event.GetKeyCode() == ui::VKEY_ESCAPE) {
// Blink does not send char events for backspace or escape keys, see
// WebKeyboardEvent::IsCharacterKey() and b/961192 for more information.
// So just fake one since PDFium uses it.
std::string str;
str.push_back(event.GetKeyCode());
pp::KeyboardInputEvent synthesized(pp::KeyboardInputEvent(
client_->GetPluginInstance(), PP_INPUTEVENT_TYPE_CHAR,
event.GetTimeStamp(), event.GetModifiers(), event.GetKeyCode(), str));
OnChar(synthesized);
}
return rv;
}
bool PDFiumEngine::OnKeyUp(const pp::KeyboardInputEvent& event) {
if (last_page_mouse_down_ == -1)
return false;
// Check if form text selection needs to be updated.
FPDF_PAGE page = pages_[last_page_mouse_down_]->GetPage();
if (in_form_text_area_)
SetFormSelectedText(form_, page);
return !!FORM_OnKeyUp(form_, page, event.GetKeyCode(), event.GetModifiers());
}
bool PDFiumEngine::OnChar(const pp::KeyboardInputEvent& event) {
if (last_page_mouse_down_ == -1)
return false;
base::string16 str = base::UTF8ToUTF16(event.GetCharacterText().AsString());
return !!FORM_OnChar(form_, pages_[last_page_mouse_down_]->GetPage(), str[0],
event.GetModifiers());
}
void PDFiumEngine::StartFind(const std::string& text, bool case_sensitive) {
// If the caller asks StartFind() to search for no text, then this is an
// error on the part of the caller. The PPAPI Find_Private interface
// guarantees it is not empty, so this should never happen.
DCHECK(!text.empty());
// If StartFind() gets called before we have any page information (i.e.
// before the first call to LoadDocument has happened). Handle this case.
if (pages_.empty())
return;
bool first_search = (current_find_text_ != text);
int character_to_start_searching_from = 0;
if (first_search) {
std::vector<PDFiumRange> old_selection = selection_;
StopFind();
current_find_text_ = text;
if (old_selection.empty()) {
// Start searching from the beginning of the document.
next_page_to_search_ = 0;
last_page_to_search_ = pages_.size() - 1;
last_character_index_to_search_ = -1;
} else {
// There's a current selection, so start from it.
next_page_to_search_ = old_selection[0].page_index();
last_character_index_to_search_ = old_selection[0].char_index();
character_to_start_searching_from = old_selection[0].char_index();
last_page_to_search_ = next_page_to_search_;
}
}
int current_page = next_page_to_search_;
if (pages_[current_page]->available()) {
base::string16 str = base::UTF8ToUTF16(text);
// Don't use PDFium to search for now, since it doesn't support unicode
// text. Leave the code for now to avoid bit-rot, in case it's fixed later.
if (0) {
SearchUsingPDFium(str, case_sensitive, first_search,
character_to_start_searching_from, current_page);
} else {
SearchUsingICU(str, case_sensitive, first_search,
character_to_start_searching_from, current_page);
}
if (!IsPageVisible(current_page))
pages_[current_page]->Unload();
}
if (next_page_to_search_ != last_page_to_search_ ||
(first_search && last_character_index_to_search_ != -1)) {
++next_page_to_search_;
}
if (next_page_to_search_ == static_cast<int>(pages_.size()))
next_page_to_search_ = 0;
// If there's only one page in the document and we start searching midway,
// then we'll want to search the page one more time.
bool end_of_search =
next_page_to_search_ == last_page_to_search_ &&
// Only one page but didn't start midway.
((pages_.size() == 1 && last_character_index_to_search_ == -1) ||
// Started midway, but only 1 page and we already looped around.
(pages_.size() == 1 && !first_search) ||
// Started midway, and we've just looped around.
(pages_.size() > 1 && current_page == next_page_to_search_));
if (end_of_search) {
// Send the final notification.
client_->NotifyNumberOfFindResultsChanged(find_results_.size(), true);
} else {
pp::CompletionCallback callback =
find_factory_.NewCallback(&PDFiumEngine::ContinueFind);
pp::Module::Get()->core()->CallOnMainThread(0, callback,
case_sensitive ? 1 : 0);
}
}
void PDFiumEngine::SearchUsingPDFium(const base::string16& term,
bool case_sensitive,
bool first_search,
int character_to_start_searching_from,
int current_page) {
// Find all the matches in the current page.
unsigned long flags = case_sensitive ? FPDF_MATCHCASE : 0;
FPDF_SCHHANDLE find =
FPDFText_FindStart(pages_[current_page]->GetTextPage(),
reinterpret_cast<const unsigned short*>(term.c_str()),
flags, character_to_start_searching_from);
// Note: since we search one page at a time, we don't find matches across
// page boundaries. We could do this manually ourself, but it seems low
// priority since Reader itself doesn't do it.
while (FPDFText_FindNext(find)) {
PDFiumRange result(pages_[current_page].get(),
FPDFText_GetSchResultIndex(find),
FPDFText_GetSchCount(find));
if (!first_search && last_character_index_to_search_ != -1 &&
result.page_index() == last_page_to_search_ &&
result.char_index() >= last_character_index_to_search_) {
break;
}
AddFindResult(result);
}
FPDFText_FindClose(find);
}
void PDFiumEngine::SearchUsingICU(const base::string16& term,
bool case_sensitive,
bool first_search,
int character_to_start_searching_from,
int current_page) {
DCHECK(!term.empty());
const int original_text_length = pages_[current_page]->GetCharCount();
int text_length = original_text_length;
if (character_to_start_searching_from) {
text_length -= character_to_start_searching_from;
} else if (!first_search && last_character_index_to_search_ != -1 &&
current_page == last_page_to_search_) {
text_length = last_character_index_to_search_;
}
if (text_length <= 0)
return;
// Adding +1 to text_length to account for the string terminator that is
// included.
base::string16 page_text;
PDFiumAPIStringBufferAdapter<base::string16> api_string_adapter(
&page_text, text_length + 1, false);
unsigned short* data =
reinterpret_cast<unsigned short*>(api_string_adapter.GetData());
int written = FPDFText_GetText(pages_[current_page]->GetTextPage(),
character_to_start_searching_from,
text_length + 1, data);
api_string_adapter.Close(written);
std::vector<PDFEngine::Client::SearchStringResult> results =
client_->SearchString(page_text.c_str(), term.c_str(), case_sensitive);
for (const auto& result : results) {
// Need to map the indexes from the page text, which may have generated
// characters like space etc, to character indices from the page.
int temp_start = result.start_index + character_to_start_searching_from;
int start = FPDFText_GetCharIndexFromTextIndex(
pages_[current_page]->GetTextPage(), temp_start);
int end = FPDFText_GetCharIndexFromTextIndex(
pages_[current_page]->GetTextPage(), temp_start + result.length);
// If |term| occurs at the end of a page, then |end| will be -1 due to the
// index being out of bounds. Compensate for this case so the range
// character count calculation below works out.
if (temp_start + result.length == original_text_length) {
DCHECK_EQ(-1, end);
end = original_text_length;
}
DCHECK_LT(start, end);
DCHECK_EQ(term.size(), static_cast<size_t>(end - start));
AddFindResult(PDFiumRange(pages_[current_page].get(), start, end - start));
}
}
void PDFiumEngine::AddFindResult(const PDFiumRange& result) {
// Figure out where to insert the new location, since we could have
// started searching midway and now we wrapped.
size_t result_index;
int page_index = result.page_index();
int char_index = result.char_index();
for (result_index = 0; result_index < find_results_.size(); ++result_index) {
if (find_results_[result_index].page_index() > page_index ||
(find_results_[result_index].page_index() == page_index &&
find_results_[result_index].char_index() > char_index)) {
break;
}
}
find_results_.insert(find_results_.begin() + result_index, result);
UpdateTickMarks();
client_->NotifyNumberOfFindResultsChanged(find_results_.size(), false);
}
bool PDFiumEngine::SelectFindResult(bool forward) {
if (find_results_.empty()) {
NOTREACHED();
return false;
}
SelectionChangeInvalidator selection_invalidator(this);
// Move back/forward through the search locations we previously found.
size_t new_index;
const size_t last_index = find_results_.size() - 1;
if (resume_find_index_.valid()) {
new_index = resume_find_index_.GetIndex();
resume_find_index_.Invalidate();
} else if (current_find_index_.valid()) {
size_t current_index = current_find_index_.GetIndex();
if ((forward && current_index >= last_index) ||
(!forward && current_index == 0)) {
current_find_index_.Invalidate();
client_->NotifySelectedFindResultChanged(-1);
client_->NotifyNumberOfFindResultsChanged(find_results_.size(), true);
return true;
}
int increment = forward ? 1 : -1;
new_index = current_index + increment;
} else {
new_index = forward ? 0 : last_index;
}
current_find_index_.SetIndex(new_index);
// Update the selection before telling the client to scroll, since it could
// paint then.
selection_.clear();
selection_.push_back(find_results_[current_find_index_.GetIndex()]);
// If the result is not in view, scroll to it.
pp::Rect bounding_rect;
pp::Rect visible_rect = GetVisibleRect();
// Use zoom of 1.0 since |visible_rect| is without zoom.
const std::vector<pp::Rect>& rects =
find_results_[current_find_index_.GetIndex()].GetScreenRects(
pp::Point(), 1.0, current_rotation_);
for (const auto& rect : rects)
bounding_rect = bounding_rect.Union(rect);
if (!visible_rect.Contains(bounding_rect)) {
pp::Point center = bounding_rect.CenterPoint();
// Make the page centered.
int new_y = CalculateCenterForZoom(center.y(), visible_rect.height(),
current_zoom_);
client_->ScrollToY(new_y, /*compensate_for_toolbar=*/false);
// Only move horizontally if it's not visible.
if (center.x() < visible_rect.x() || center.x() > visible_rect.right()) {
int new_x = CalculateCenterForZoom(center.x(), visible_rect.width(),
current_zoom_);
client_->ScrollToX(new_x);
}
}
client_->NotifySelectedFindResultChanged(current_find_index_.GetIndex());
client_->NotifyNumberOfFindResultsChanged(find_results_.size(), true);
return true;
}
void PDFiumEngine::StopFind() {
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
selecting_ = false;
find_results_.clear();
next_page_to_search_ = -1;
last_page_to_search_ = -1;
last_character_index_to_search_ = -1;
current_find_index_.Invalidate();
current_find_text_.clear();
UpdateTickMarks();
find_factory_.CancelAll();
}
void PDFiumEngine::GetAllScreenRectsUnion(std::vector<PDFiumRange>* rect_range,
const pp::Point& offset_point,
std::vector<pp::Rect>* rect_vector) {
for (auto& range : *rect_range) {
pp::Rect result_rect;
const std::vector<pp::Rect>& rects =
range.GetScreenRects(offset_point, current_zoom_, current_rotation_);
for (const auto& rect : rects)
result_rect = result_rect.Union(rect);
rect_vector->push_back(result_rect);
}
}
void PDFiumEngine::UpdateTickMarks() {
std::vector<pp::Rect> tickmarks;
GetAllScreenRectsUnion(&find_results_, pp::Point(0, 0), &tickmarks);
client_->UpdateTickMarks(tickmarks);
}
void PDFiumEngine::ZoomUpdated(double new_zoom_level) {
CancelPaints();
current_zoom_ = new_zoom_level;
CalculateVisiblePages();
UpdateTickMarks();
}
void PDFiumEngine::RotateClockwise() {
current_rotation_ = (current_rotation_ + 1) % 4;
RotateInternal();
}
void PDFiumEngine::RotateCounterclockwise() {
current_rotation_ = (current_rotation_ - 1) % 4;
RotateInternal();
}
void PDFiumEngine::InvalidateAllPages() {
CancelPaints();
StopFind();
LoadPageInfo(true);
client_->Invalidate(pp::Rect(plugin_size_));
}
std::string PDFiumEngine::GetSelectedText() {
if (!HasPermission(PDFEngine::PERMISSION_COPY))
return std::string();
base::string16 result;
for (size_t i = 0; i < selection_.size(); ++i) {
static constexpr base::char16 kNewLineChar = L'\n';
base::string16 current_selection_text = selection_[i].GetText();
if (i != 0) {
if (selection_[i - 1].page_index() > selection_[i].page_index())
std::swap(current_selection_text, result);
result.push_back(kNewLineChar);
}
result.append(current_selection_text);
}
FormatStringWithHyphens(&result);
FormatStringForOS(&result);
return base::UTF16ToUTF8(result);
}
bool PDFiumEngine::CanEditText() {
return editable_form_text_area_;
}
void PDFiumEngine::ReplaceSelection(const std::string& text) {
DCHECK(CanEditText());
if (last_page_mouse_down_ != -1) {
base::string16 text_wide = base::UTF8ToUTF16(text);
FPDF_WIDESTRING text_pdf_wide =
reinterpret_cast<FPDF_WIDESTRING>(text_wide.c_str());
FORM_ReplaceSelection(form_, pages_[last_page_mouse_down_]->GetPage(),
text_pdf_wide);
}
}
std::string PDFiumEngine::GetLinkAtPosition(const pp::Point& point) {
std::string url;
int temp;
int page_index = -1;
int form_type = FPDF_FORMFIELD_UNKNOWN;
PDFiumPage::LinkTarget target;
PDFiumPage::Area area =
GetCharIndex(point, &page_index, &temp, &form_type, &target);
if (area == PDFiumPage::WEBLINK_AREA)
url = target.url;
return url;
}
bool PDFiumEngine::HasPermission(DocumentPermission permission) const {
// PDF 1.7 spec, section 3.5.2 says: "If the revision number is 2 or greater,
// the operations to which user access can be controlled are as follows: ..."
//
// Thus for revision numbers less than 2, permissions are ignored and this
// always returns true.
if (permissions_handler_revision_ < 2)
return true;
// Handle high quality printing permission separately for security handler
// revision 3+. See table 3.20 in the PDF 1.7 spec.
if (permission == PERMISSION_PRINT_HIGH_QUALITY &&
permissions_handler_revision_ >= 3) {
return (permissions_ & kPDFPermissionPrintLowQualityMask) != 0 &&
(permissions_ & kPDFPermissionPrintHighQualityMask) != 0;
}
switch (permission) {
case PERMISSION_COPY:
return (permissions_ & kPDFPermissionCopyMask) != 0;
case PERMISSION_COPY_ACCESSIBLE:
return (permissions_ & kPDFPermissionCopyAccessibleMask) != 0;
case PERMISSION_PRINT_LOW_QUALITY:
case PERMISSION_PRINT_HIGH_QUALITY:
// With security handler revision 2 rules, check the same bit for high
// and low quality. See table 3.20 in the PDF 1.7 spec.
return (permissions_ & kPDFPermissionPrintLowQualityMask) != 0;
default:
return true;
}
}
void PDFiumEngine::SelectAll() {
if (in_form_text_area_)
return;
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
for (const auto& page : pages_) {
if (page->available())
selection_.push_back(PDFiumRange(page.get(), 0, page->GetCharCount()));
}
}
int PDFiumEngine::GetNumberOfPages() {
return pages_.size();
}
pp::VarArray PDFiumEngine::GetBookmarks() {
pp::VarDictionary dict = TraverseBookmarks(nullptr, 0);
// The root bookmark contains no useful information.
return pp::VarArray(dict.Get(pp::Var("children")));
}
pp::VarDictionary PDFiumEngine::TraverseBookmarks(FPDF_BOOKMARK bookmark,
unsigned int depth) {
pp::VarDictionary dict;
base::string16 title;
unsigned long buffer_size = FPDFBookmark_GetTitle(bookmark, nullptr, 0);
if (buffer_size > 0) {
PDFiumAPIStringBufferSizeInBytesAdapter<base::string16> api_string_adapter(
&title, buffer_size, true);
api_string_adapter.Close(FPDFBookmark_GetTitle(
bookmark, api_string_adapter.GetData(), buffer_size));
}
dict.Set(pp::Var("title"), pp::Var(base::UTF16ToUTF8(title)));
FPDF_DEST dest = FPDFBookmark_GetDest(doc_, bookmark);
// Some bookmarks don't have a page to select.
if (dest) {
unsigned long page_index = FPDFDest_GetPageIndex(doc_, dest);
if (page_index < pages_.size() &&
base::IsValueInRangeForNumericType<int32_t>(page_index)) {
dict.Set(pp::Var("page"), pp::Var(static_cast<int32_t>(page_index)));
PDFiumPage::LinkTarget target;
pages_[page_index]->GetPageYTarget(dest, &target);
if (target.y_in_pixels)
dict.Set(pp::Var("y"), pp::Var(target.y_in_pixels.value()));
}
} else {
// Extract URI for bookmarks linking to an external page.
FPDF_ACTION action = FPDFBookmark_GetAction(bookmark);
buffer_size = FPDFAction_GetURIPath(doc_, action, nullptr, 0);
if (buffer_size > 0) {
std::string uri;
PDFiumAPIStringBufferAdapter<std::string> api_string_adapter(
&uri, buffer_size, true);
api_string_adapter.Close(FPDFAction_GetURIPath(
doc_, action, api_string_adapter.GetData(), buffer_size));
dict.Set(pp::Var("uri"), pp::Var(uri));
}
}
pp::VarArray children;
// Don't trust PDFium to handle circular bookmarks.
const unsigned int kMaxDepth = 128;
if (depth < kMaxDepth) {
int child_index = 0;
std::set<FPDF_BOOKMARK> seen_bookmarks;
for (FPDF_BOOKMARK child_bookmark =
FPDFBookmark_GetFirstChild(doc_, bookmark);
child_bookmark;
child_bookmark = FPDFBookmark_GetNextSibling(doc_, child_bookmark)) {
if (base::ContainsKey(seen_bookmarks, child_bookmark))
break;
seen_bookmarks.insert(child_bookmark);
children.Set(child_index, TraverseBookmarks(child_bookmark, depth + 1));
child_index++;
}
}
dict.Set(pp::Var("children"), children);
return dict;
}
int PDFiumEngine::GetNamedDestinationPage(const std::string& destination) {
// Look for the destination.
FPDF_DEST dest = FPDF_GetNamedDestByName(doc_, destination.c_str());
if (!dest) {
// Look for a bookmark with the same name.
base::string16 destination_wide = base::UTF8ToUTF16(destination);
FPDF_WIDESTRING destination_pdf_wide =
reinterpret_cast<FPDF_WIDESTRING>(destination_wide.c_str());
FPDF_BOOKMARK bookmark = FPDFBookmark_Find(doc_, destination_pdf_wide);
if (bookmark)
dest = FPDFBookmark_GetDest(doc_, bookmark);
}
return dest ? FPDFDest_GetPageIndex(doc_, dest) : -1;
}
int PDFiumEngine::GetMostVisiblePage() {
if (in_flight_visible_page_)
return *in_flight_visible_page_;
// We can call GetMostVisiblePage through a callback from PDFium. We have
// to defer the page deletion otherwise we could potentially delete the page
// that originated the calling JS request and destroy the objects that are
// currently being used.
base::AutoReset<bool> defer_page_unload_guard(&defer_page_unload_, true);
CalculateVisiblePages();
return most_visible_page_;
}
pp::Rect PDFiumEngine::GetPageRect(int index) {
pp::Rect rc(pages_[index]->rect());
rc.Inset(-kPageShadowLeft, -kPageShadowTop, -kPageShadowRight,
-kPageShadowBottom);
return rc;
}
pp::Rect PDFiumEngine::GetPageBoundsRect(int index) {
return pages_[index]->rect();
}
pp::Rect PDFiumEngine::GetPageContentsRect(int index) {
return GetScreenRect(pages_[index]->rect());
}
int PDFiumEngine::GetVerticalScrollbarYPosition() {
return position_.y();
}
void PDFiumEngine::SetGrayscale(bool grayscale) {
render_grayscale_ = grayscale;
}
void PDFiumEngine::OnCallback(int id) {
auto it = formfill_timers_.find(id);
if (it == formfill_timers_.end())
return;
it->second.timer_callback(id);
it = formfill_timers_.find(id); // The callback might delete the timer.
if (it != formfill_timers_.end())
client_->ScheduleCallback(id, it->second.timer_period);
}
void PDFiumEngine::OnTouchTimerCallback(int id) {
if (!touch_timers_.count(id))
return;
HandleLongPress(touch_timers_[id]);
KillTouchTimer(id);
}
void PDFiumEngine::HandleLongPress(const pp::TouchInputEvent& event) {
pp::FloatPoint fp =
event.GetTouchByIndex(PP_TOUCHLIST_TYPE_TARGETTOUCHES, 0).position();
pp::Point point;
point.set_x(fp.x());
point.set_y(fp.y());
// Send a fake mouse down to trigger the multi-click selection code.
pp::MouseInputEvent mouse_event(
client_->GetPluginInstance(), PP_INPUTEVENT_TYPE_MOUSEDOWN,
event.GetTimeStamp(), event.GetModifiers(),
PP_INPUTEVENT_MOUSEBUTTON_LEFT, point, 2, point);
OnMouseDown(mouse_event);
}
int PDFiumEngine::GetCharCount(int page_index) {
DCHECK(PageIndexInBounds(page_index));
return pages_[page_index]->GetCharCount();
}
pp::FloatRect PDFiumEngine::GetCharBounds(int page_index, int char_index) {
DCHECK(PageIndexInBounds(page_index));
return pages_[page_index]->GetCharBounds(char_index);
}
uint32_t PDFiumEngine::GetCharUnicode(int page_index, int char_index) {
DCHECK(PageIndexInBounds(page_index));
return pages_[page_index]->GetCharUnicode(char_index);
}
void PDFiumEngine::GetTextRunInfo(int page_index,
int start_char_index,
uint32_t* out_len,
double* out_font_size,
pp::FloatRect* out_bounds) {
DCHECK(PageIndexInBounds(page_index));
return pages_[page_index]->GetTextRunInfo(start_char_index, out_len,
out_font_size, out_bounds);
}
bool PDFiumEngine::GetPrintScaling() {
return !!FPDF_VIEWERREF_GetPrintScaling(doc_);
}
int PDFiumEngine::GetCopiesToPrint() {
return FPDF_VIEWERREF_GetNumCopies(doc_);
}
int PDFiumEngine::GetDuplexType() {
return static_cast<int>(FPDF_VIEWERREF_GetDuplex(doc_));
}
bool PDFiumEngine::GetPageSizeAndUniformity(pp::Size* size) {
if (pages_.empty())
return false;
pp::Size page_size = GetPageSize(0);
for (size_t i = 1; i < pages_.size(); ++i) {
if (page_size != GetPageSize(i))
return false;
}
// Convert |page_size| back to points.
size->set_width(
ConvertUnit(page_size.width(), kPixelsPerInch, kPointsPerInch));
size->set_height(
ConvertUnit(page_size.height(), kPixelsPerInch, kPointsPerInch));
return true;
}
void PDFiumEngine::AppendBlankPages(int num_pages) {
DCHECK_NE(num_pages, 0);
if (!doc_)
return;
selection_.clear();
pending_pages_.clear();
// Delete all pages except the first one.
while (pages_.size() > 1) {
pages_.pop_back();
FPDFPage_Delete(doc_, pages_.size());
}
// Calculate document size and all page sizes.
std::vector<pp::Rect> page_rects;
pp::Size page_size = GetPageSize(0);
page_size.Enlarge(kPageShadowLeft + kPageShadowRight,
kPageShadowTop + kPageShadowBottom);
pp::Size old_document_size = document_size_;
document_size_ = pp::Size(page_size.width(), 0);
for (int i = 0; i < num_pages; ++i) {
if (i != 0) {
// Add space for horizontal separator.
document_size_.Enlarge(0, kPageSeparatorThickness);
}
pp::Rect rect(pp::Point(0, document_size_.height()), page_size);
page_rects.push_back(rect);
document_size_.Enlarge(0, page_size.height());
}
// Create blank pages.
for (int i = 1; i < num_pages; ++i) {
pp::Rect page_rect(page_rects[i]);
page_rect.Inset(kPageShadowLeft, kPageShadowTop, kPageShadowRight,
kPageShadowBottom);
double width_in_points =
ConvertUnitDouble(page_rect.width(), kPixelsPerInch, kPointsPerInch);
double height_in_points =
ConvertUnitDouble(page_rect.height(), kPixelsPerInch, kPointsPerInch);
FPDFPage_New(doc_, i, width_in_points, height_in_points);
pages_.push_back(std::make_unique<PDFiumPage>(this, i, page_rect, true));
}