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chromium / chromium / src / bf123c12c50993a3095dd732c551cf14a79ae4a0 / . / pdf / pdfium / pdfium_engine.cc
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// 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 <string>
#include <utility>
#include "base/auto_reset.h"
#include "base/bind.h"
#include "base/check_op.h"
#include "base/debug/alias.h"
#include "base/feature_list.h"
#include "base/notreached.h"
#include "base/stl_util.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "gin/array_buffer.h"
#include "gin/public/gin_embedders.h"
#include "gin/public/isolate_holder.h"
#include "gin/public/v8_platform.h"
#include "pdf/accessibility_structs.h"
#include "pdf/document_loader_impl.h"
#include "pdf/draw_utils/coordinates.h"
#include "pdf/draw_utils/shadow.h"
#include "pdf/pdf_features.h"
#include "pdf/pdf_transform.h"
#include "pdf/pdf_utils/dates.h"
#include "pdf/pdfium/pdfium_api_string_buffer_adapter.h"
#include "pdf/pdfium/pdfium_document.h"
#include "pdf/pdfium/pdfium_mem_buffer_file_read.h"
#include "pdf/pdfium/pdfium_mem_buffer_file_write.h"
#include "pdf/pdfium/pdfium_permissions.h"
#include "pdf/pdfium/pdfium_unsupported_features.h"
#include "pdf/ppapi_migration/bitmap.h"
#include "pdf/ppapi_migration/geometry_conversions.h"
#include "pdf/ppapi_migration/input_event_conversions.h"
#include "pdf/ppapi_migration/url_loader.h"
#include "pdf/url_loader_wrapper_impl.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/private/pdf.h"
#include "printing/units.h"
#include "third_party/pdfium/public/cpp/fpdf_scopers.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_ext.h"
#include "third_party/pdfium/public/fpdf_fwlevent.h"
#include "third_party/pdfium/public/fpdf_ppo.h"
#include "third_party/pdfium/public/fpdf_searchex.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/events/keycodes/keyboard_codes.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/point_conversions.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/geometry/vector2d.h"
#include "v8/include/v8.h"
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
#include "pdf/pdfium/pdfium_font_linux.h"
#endif
using printing::ConvertUnit;
using printing::ConvertUnitDouble;
using printing::kPixelsPerInch;
using printing::kPointsPerInch;
namespace chrome_pdf {
namespace {
constexpr int32_t kHighlightColorR = 153;
constexpr int32_t kHighlightColorG = 193;
constexpr int32_t kHighlightColorB = 218;
constexpr uint32_t kPendingPageColor = 0xFFEEEEEE;
constexpr uint32_t kFormHighlightColor = 0xFFE4DD;
constexpr int32_t kFormHighlightAlpha = 100;
constexpr int kMaxPasswordTries = 3;
constexpr base::TimeDelta kTouchLongPressTimeout =
base::TimeDelta::FromMilliseconds(300);
// Windows has native panning capabilities. No need to use our own.
#if defined(OS_WIN)
constexpr bool kViewerImplementedPanning = false;
#else
constexpr bool kViewerImplementedPanning = true;
#endif
constexpr 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);
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;
constexpr 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 constexpr 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 constexpr base::char16 kSpaceCrCn[] = {L' ', L'\r', L'\n', L'\0'};
static constexpr 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 constexpr base::char16 kCr[] = {L'\r', L'\0'};
static constexpr 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;
if (cur == kZeroWidthSpace)
return true;
return false;
}
#if defined(PDF_ENABLE_V8)
gin::IsolateHolder* g_isolate_holder = nullptr;
bool IsV8Initialized() {
return !!g_isolate_holder;
}
void SetUpV8() {
const char* recommended = FPDF_GetRecommendedV8Flags();
v8::V8::SetFlagsFromString(recommended, strlen(recommended));
gin::IsolateHolder::Initialize(
gin::IsolateHolder::kNonStrictMode,
static_cast<v8::ArrayBuffer::Allocator*>(
FPDF_GetArrayBufferAllocatorSharedInstance()));
DCHECK(!g_isolate_holder);
g_isolate_holder = new gin::IsolateHolder(
base::ThreadTaskRunnerHandle::Get(), gin::IsolateHolder::kSingleThread,
gin::IsolateHolder::IsolateType::kUtility);
g_isolate_holder->isolate()->Enter();
}
void TearDownV8() {
g_isolate_holder->isolate()->Exit();
delete g_isolate_holder;
g_isolate_holder = nullptr;
}
#endif // defined(PDF_ENABLE_V8)
// 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.
MouseInputEvent NormalizeMouseEvent(const MouseInputEvent& event) {
MouseInputEvent normalized_event = event;
#if defined(OS_MAC)
uint32_t modifiers = event.GetModifiers();
if ((event.GetModifiers() & kInputEventModifierControlKey) &&
event.GetButton() == InputEventMouseButtonType::kLeft &&
event.GetEventType() == InputEventType::kMouseDown) {
uint32_t new_modifiers = modifiers & ~kInputEventModifierControlKey;
normalized_event =
MouseInputEvent(InputEventType::kMouseDown, event.GetTimeStamp(),
new_modifiers, InputEventMouseButtonType::kRight,
event.GetPosition(), 1, event.GetMovement());
}
#endif
return normalized_event;
}
// These values are intended for the JS to handle, and it doesn't have access
// to the PDFDEST_VIEW_* defines.
std::string ConvertViewIntToViewString(unsigned long view_int) {
switch (view_int) {
case PDFDEST_VIEW_XYZ:
return "XYZ";
case PDFDEST_VIEW_FIT:
return "Fit";
case PDFDEST_VIEW_FITH:
return "FitH";
case PDFDEST_VIEW_FITV:
return "FitV";
case PDFDEST_VIEW_FITR:
return "FitR";
case PDFDEST_VIEW_FITB:
return "FitB";
case PDFDEST_VIEW_FITBH:
return "FitBH";
case PDFDEST_VIEW_FITBV:
return "FitBV";
case PDFDEST_VIEW_UNKNOWN_MODE:
return "";
default:
NOTREACHED();
return "";
}
}
// Simplify to \" for searching
constexpr wchar_t kHebrewPunctuationGershayimCharacter = 0x05F4;
constexpr wchar_t kLeftDoubleQuotationMarkCharacter = 0x201C;
constexpr wchar_t kRightDoubleQuotationMarkCharacter = 0x201D;
// Simplify \' for searching
constexpr wchar_t kHebrewPunctuationGereshCharacter = 0x05F3;
constexpr wchar_t kLeftSingleQuotationMarkCharacter = 0x2018;
constexpr wchar_t kRightSingleQuotationMarkCharacter = 0x2019;
wchar_t SimplifyForSearch(wchar_t c) {
switch (c) {
case kHebrewPunctuationGershayimCharacter:
case kLeftDoubleQuotationMarkCharacter:
case kRightDoubleQuotationMarkCharacter:
return L'\"';
case kHebrewPunctuationGereshCharacter:
case kLeftSingleQuotationMarkCharacter:
case kRightSingleQuotationMarkCharacter:
return L'\'';
default:
return c;
}
}
PP_PrivateFocusObjectType GetAnnotationFocusType(
FPDF_ANNOTATION_SUBTYPE annot_type) {
switch (annot_type) {
case FPDF_ANNOT_LINK:
return PP_PrivateFocusObjectType::PP_PRIVATEFOCUSOBJECT_LINK;
case FPDF_ANNOT_HIGHLIGHT:
return PP_PrivateFocusObjectType::PP_PRIVATEFOCUSOBJECT_HIGHLIGHT;
case FPDF_ANNOT_WIDGET:
return PP_PrivateFocusObjectType::PP_PRIVATEFOCUSOBJECT_TEXT_FIELD;
default:
return PP_PrivateFocusObjectType::PP_PRIVATEFOCUSOBJECT_NONE;
}
}
base::string16 GetAttachmentAttribute(FPDF_ATTACHMENT attachment,
FPDF_BYTESTRING field) {
return CallPDFiumWideStringBufferApi(
base::BindRepeating(&FPDFAttachment_GetStringValue, attachment, field),
/*check_expected_size=*/true);
}
base::string16 GetAttachmentName(FPDF_ATTACHMENT attachment) {
return CallPDFiumWideStringBufferApi(
base::BindRepeating(&FPDFAttachment_GetName, attachment),
/*check_expected_size=*/true);
}
std::string GetXYZParamsString(FPDF_DEST dest, PDFiumPage* page) {
FPDF_BOOL has_x_coord;
FPDF_BOOL has_y_coord;
FPDF_BOOL has_zoom;
FS_FLOAT x;
FS_FLOAT y;
FS_FLOAT zoom;
if (!FPDFDest_GetLocationInPage(dest, &has_x_coord, &has_y_coord, &has_zoom,
&x, &y, &zoom)) {
return "";
}
// Convert in-page coordinates to in-screen coordinates.
gfx::PointF xy(x, y);
gfx::PointF screen_coords = page->TransformPageToScreenXY(xy);
// Generate a string of the parameters
std::string xyz_params;
if (has_x_coord)
xyz_params = base::NumberToString(screen_coords.x()) + ",";
else
xyz_params = "null,";
if (has_y_coord)
xyz_params += base::NumberToString(screen_coords.y()) + ",";
else
xyz_params += "null,";
if (has_zoom) {
if (zoom == 0.0f)
NOTREACHED();
xyz_params += base::NumberToString(zoom);
} else {
xyz_params += "null";
}
return xyz_params;
}
void SetXYZParamsInScreenCoords(PDFiumPage* page, float* params) {
gfx::PointF page_coords(params[0], params[1]);
gfx::PointF screen_coords = page->TransformPageToScreenXY(page_coords);
params[0] = screen_coords.x();
params[1] = screen_coords.y();
}
void SetFitRParamsInScreenCoords(PDFiumPage* page, float* params) {
gfx::PointF point_1 =
page->TransformPageToScreenXY(gfx::PointF(params[0], params[1]));
gfx::PointF point_2 =
page->TransformPageToScreenXY(gfx::PointF(params[2], params[3]));
params[0] = point_1.x();
params[1] = point_1.y();
params[2] = point_2.x();
params[3] = point_2.y();
}
// A helper function that transforms the in-page coordinates in `params` to
// in-screen coordinates depending on the view's fit type. `params` is both an
// input and a output parameter.
void ParamsTransformPageToScreen(unsigned long view_fit_type,
PDFiumPage* page,
float* params) {
switch (view_fit_type) {
case PDFDEST_VIEW_XYZ:
SetXYZParamsInScreenCoords(page, params);
break;
case PDFDEST_VIEW_FIT:
case PDFDEST_VIEW_FITB:
// No parameters for coordinates to be transformed.
break;
case PDFDEST_VIEW_FITBH:
case PDFDEST_VIEW_FITH:
// FitH/FitBH only has 1 parameter for y coordinate.
params[0] = page->TransformPageToScreenY(params[0]);
break;
case PDFDEST_VIEW_FITBV:
case PDFDEST_VIEW_FITV:
// FitV/FitBV only has 1 parameter for x coordinate.
params[0] = page->TransformPageToScreenX(params[0]);
break;
case PDFDEST_VIEW_FITR:
SetFitRParamsInScreenCoords(page, params);
break;
case PDFDEST_VIEW_UNKNOWN_MODE:
break;
default:
NOTREACHED();
break;
}
}
} // namespace
void InitializeSDK(bool enable_v8) {
FPDF_LIBRARY_CONFIG config;
config.version = 3;
config.m_pUserFontPaths = nullptr;
config.m_pIsolate = nullptr;
config.m_pPlatform = nullptr;
config.m_v8EmbedderSlot = gin::kEmbedderPDFium;
#if defined(PDF_ENABLE_V8)
if (enable_v8) {
SetUpV8();
config.m_pIsolate = v8::Isolate::GetCurrent();
// NOTE: static_cast<> prior to assigning to (void*) is safer since it
// will manipulate the pointer value should gin::V8Platform someday have
// multiple base classes.
config.m_pPlatform = static_cast<v8::Platform*>(gin::V8Platform::Get());
}
#endif // defined(PDF_ENABLE_V8)
FPDF_InitLibraryWithConfig(&config);
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
InitializeLinuxFontMapper();
#endif
InitializeUnsupportedFeaturesHandler();
}
void ShutdownSDK() {
FPDF_DestroyLibrary();
#if defined(PDF_ENABLE_V8)
if (IsV8Initialized())
TearDownV8();
#endif // defined(PDF_ENABLE_V8)
}
PDFEngine::AccessibilityLinkInfo::AccessibilityLinkInfo() = default;
PDFEngine::AccessibilityLinkInfo::AccessibilityLinkInfo(
const AccessibilityLinkInfo& that) = default;
PDFEngine::AccessibilityLinkInfo::~AccessibilityLinkInfo() = default;
PDFEngine::AccessibilityImageInfo::AccessibilityImageInfo() = default;
PDFEngine::AccessibilityImageInfo::AccessibilityImageInfo(
const AccessibilityImageInfo& that) = default;
PDFEngine::AccessibilityImageInfo::~AccessibilityImageInfo() = default;
PDFEngine::AccessibilityHighlightInfo::AccessibilityHighlightInfo() = default;
PDFEngine::AccessibilityHighlightInfo::AccessibilityHighlightInfo(
const AccessibilityHighlightInfo& that) = default;
PDFEngine::AccessibilityHighlightInfo::~AccessibilityHighlightInfo() = default;
PDFEngine::AccessibilityTextFieldInfo::AccessibilityTextFieldInfo() = default;
PDFEngine::AccessibilityTextFieldInfo::AccessibilityTextFieldInfo(
const AccessibilityTextFieldInfo& that) = default;
PDFEngine::AccessibilityTextFieldInfo::~AccessibilityTextFieldInfo() = default;
PDFiumEngine::PDFiumEngine(PDFEngine::Client* client,
PDFiumFormFiller::ScriptOption script_option)
: client_(client),
form_filler_(this, script_option),
mouse_down_state_(PDFiumPage::NONSELECTABLE_AREA,
PDFiumPage::LinkTarget()),
print_(this) {
#if defined(PDF_ENABLE_V8)
if (script_option != PDFiumFormFiller::ScriptOption::kNoJavaScript)
DCHECK(IsV8Initialized());
#endif // defined(PDF_ENABLE_V8)
IFSDK_PAUSE::version = 1;
IFSDK_PAUSE::user = nullptr;
IFSDK_PAUSE::NeedToPauseNow = Pause_NeedToPauseNow;
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
// PreviewModeClient does not know its pp::Instance.
SetLastInstance(client_->GetPluginInstance());
#endif
}
PDFiumEngine::~PDFiumEngine() {
for (auto& page : pages_)
page->Unload();
if (doc())
FORM_DoDocumentAAction(form(), FPDFDOC_AACTION_WC);
}
void PDFiumEngine::SetDocumentLoaderForTesting(
std::unique_ptr<DocumentLoader> loader) {
DCHECK(loader);
DCHECK(!doc_loader_);
doc_loader_ = std::move(loader);
doc_loader_set_for_testing_ = true;
}
bool PDFiumEngine::New(const char* url, const char* headers) {
url_ = url;
if (headers)
headers_ = headers;
else
headers_.clear();
return true;
}
void PDFiumEngine::PageOffsetUpdated(const gfx::Vector2d& page_offset) {
page_offset_ = page_offset;
}
void PDFiumEngine::PluginSizeUpdated(const gfx::Size& size) {
CancelPaints();
plugin_size_ = size;
CalculateVisiblePages();
}
void PDFiumEngine::ScrolledToXPosition(int position) {
CancelPaints();
int old_x = position_.x();
position_.set_x(position);
CalculateVisiblePages();
client_->DidScroll(gfx::Vector2d(old_x - position, 0));
OnSelectionPositionChanged();
}
void PDFiumEngine::ScrolledToYPosition(int position) {
CancelPaints();
int old_y = position_.y();
position_.set_y(position);
CalculateVisiblePages();
client_->DidScroll(gfx::Vector2d(0, old_y - position));
OnSelectionPositionChanged();
}
void PDFiumEngine::PrePaint() {
for (auto& paint : progressive_paints_)
paint.set_painted(false);
}
void PDFiumEngine::Paint(const gfx::Rect& rect,
SkBitmap& image_data,
std::vector<gfx::Rect>& ready,
std::vector<gfx::Rect>& pending) {
gfx::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.
gfx::Rect page_rect_in_screen = GetPageScreenRect(index);
gfx::Rect dirty_in_screen =
gfx::IntersectRects(page_rect_in_screen, 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 two-up view is enabled, we don't need to recompute |leftover| since
// subtracting |leftover| with a two-up view page won't result in a
// rectangle.
if (!layout_.options().two_up_view_enabled()) {
if (i == 0) {
gfx::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.Subtract(blank_space_in_screen);
}
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].set_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());
progressive_paints_.erase(progressive_paints_.begin() + i);
--i;
}
}
bool PDFiumEngine::HandleDocumentLoad(std::unique_ptr<UrlLoader> loader) {
password_tries_remaining_ = kMaxPasswordTries;
process_when_pending_request_complete_ =
base::FeatureList::IsEnabled(features::kPdfIncrementalLoading);
if (!doc_loader_set_for_testing_) {
auto loader_wrapper =
std::make_unique<URLLoaderWrapperImpl>(std::move(loader));
loader_wrapper->SetResponseHeaders(headers_);
doc_loader_ = std::make_unique<DocumentLoaderImpl>(this);
if (!doc_loader_->Init(std::move(loader_wrapper), url_))
return false;
}
document_ = std::make_unique<PDFiumDocument>(doc_loader_.get());
// request initial data.
doc_loader_->RequestData(0, 1);
return true;
}
pp::Instance* PDFiumEngine::GetPluginInstance() {
return client_->GetPluginInstance();
}
std::unique_ptr<URLLoaderWrapper> PDFiumEngine::CreateURLLoader() {
return std::make_unique<URLLoaderWrapperImpl>(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);
gfx::Size curr_page_size = GetPageSize(index);
FPDFPage_Delete(doc(), index);
FPDF_ImportPages(doc(), static_cast<PDFiumEngine*>(engine)->doc(), "1",
index);
gfx::Size new_page_size = GetPageSize(index);
if (curr_page_size != new_page_size) {
DCHECK(document_loaded_);
LoadPageInfo();
}
client_->Invalidate(GetPageScreenRect(index));
}
std::vector<uint8_t> PDFiumEngine::GetSaveData() {
PDFiumMemBufferFileWrite output_file_write;
if (!FPDF_SaveAsCopy(doc(), &output_file_write, 0))
return std::vector<uint8_t>();
return output_file_write.TakeBuffer();
}
void PDFiumEngine::OnPendingRequestComplete() {
if (!process_when_pending_request_complete_)
return;
if (!fpdf_availability()) {
document_->file_access().m_FileLen = doc_loader_->GetDocumentSize();
document_->CreateFPDFAvailability();
// 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 (!IsLinearized()) {
// Wait complete document.
process_when_pending_request_complete_ = false;
document_->ResetFPDFAvailability();
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) {
DCHECK(!document_loaded_);
LoadPageInfo();
}
}
void PDFiumEngine::OnNewDataReceived() {
client_->DocumentLoadProgress(doc_loader_->BytesReceived(),
doc_loader_->GetDocumentSize());
}
void PDFiumEngine::OnDocumentComplete() {
if (doc())
return FinishLoadingDocument();
document_->file_access().m_FileLen = doc_loader_->GetDocumentSize();
if (!fpdf_availability()) {
document_->CreateFPDFAvailability();
DCHECK(fpdf_availability());
}
LoadDocument();
}
void PDFiumEngine::OnDocumentCanceled() {
if (visible_pages_.empty())
client_->DocumentLoadFailed();
else
OnDocumentComplete();
}
void PDFiumEngine::FinishLoadingDocument() {
DCHECK(doc());
DCHECK(doc_loader_->IsDocumentComplete());
LoadBody();
FX_DOWNLOADHINTS& download_hints = document_->download_hints();
bool need_update = false;
for (size_t i = 0; i < pages_.size(); ++i) {
if (pages_[i]->available())
continue;
pages_[i]->MarkAvailable();
// 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));
}
// Transition |document_loaded_| to true after finishing any calls to
// FPDFAvail_IsPageAvail(), since we no longer need to defer calls to this
// function from LoadPageInfo(). Note that LoadBody() calls LoadPageInfo()
// indirectly, so we cannot make this transition earlier.
document_loaded_ = true;
if (need_update)
LoadPageInfo();
LoadDocumentAttachmentInfoList();
LoadDocumentMetadata();
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 = !doc_attachment_info_list_.empty();
document_features.is_tagged = FPDFCatalog_IsTagged(doc());
document_features.form_type =
static_cast<FormType>(FPDF_GetFormType(doc()));
client_->DocumentLoadComplete(document_features);
}
}
void PDFiumEngine::UnsupportedFeature(const std::string& feature) {
client_->DocumentHasUnsupportedFeature(feature);
}
FPDF_AVAIL PDFiumEngine::fpdf_availability() const {
return document_ ? document_->fpdf_availability() : nullptr;
}
FPDF_DOCUMENT PDFiumEngine::doc() const {
return document_ ? document_->doc() : nullptr;
}
FPDF_FORMHANDLE PDFiumEngine::form() const {
return document_ ? document_->form() : nullptr;
}
bool PDFiumEngine::IsValidLink(const std::string& url) {
return client_->IsValidLink(url);
}
void PDFiumEngine::ContinueFind(int32_t result) {
StartFind(current_find_text_, result != 0);
}
bool PDFiumEngine::HandleEvent(const InputEvent& event) {
DCHECK(!defer_page_unload_);
defer_page_unload_ = true;
bool rv = false;
switch (event.GetEventType()) {
case InputEventType::kMouseDown:
rv = OnMouseDown(static_cast<const MouseInputEvent&>(event));
break;
case InputEventType::kMouseUp:
rv = OnMouseUp(static_cast<const MouseInputEvent&>(event));
break;
case InputEventType::kMouseMove:
rv = OnMouseMove(static_cast<const MouseInputEvent&>(event));
break;
case InputEventType::kMouseEnter:
OnMouseEnter(static_cast<const MouseInputEvent&>(event));
break;
case InputEventType::kKeyDown:
rv = OnKeyDown(static_cast<const KeyboardInputEvent&>(event));
break;
case InputEventType::kKeyUp:
rv = OnKeyUp(static_cast<const KeyboardInputEvent&>(event));
break;
case InputEventType::kChar:
rv = OnChar(static_cast<const KeyboardInputEvent&>(event));
break;
case InputEventType::kTouchStart: {
KillTouchTimer();
const auto& touch_event = static_cast<const TouchInputEvent&>(event);
if (touch_event.GetTouchCount() == 1)
ScheduleTouchTimer(touch_event);
break;
}
case InputEventType::kTouchEnd:
KillTouchTimer();
break;
case InputEventType::kTouchMove:
// TODO(dsinclair): This should allow a little bit of movement (up to the
// touch radii) to account for finger jiggle.
KillTouchTimer();
break;
default:
break;
}
DCHECK(defer_page_unload_);
defer_page_unload_ = false;
// Store the pages to unload away because the act of unloading pages can cause
// there to be more pages to unload. We leave those extra pages to be unloaded
// on the next go around.
std::vector<int> pages_to_unload;
std::swap(pages_to_unload, deferred_page_unloads_);
for (int page_index : pages_to_unload)
pages_[page_index]->Unload();
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,
const PP_PdfPrintSettings_Dev& pdf_print_settings) {
if (!page_range_count)
return pp::Resource();
if ((print_settings.format & PP_PRINTOUTPUTFORMAT_PDF) &&
HasPermission(PERMISSION_PRINT_HIGH_QUALITY)) {
return PrintPagesAsPdf(page_ranges, page_range_count, print_settings,
pdf_print_settings);
}
if (HasPermission(PERMISSION_PRINT_LOW_QUALITY)) {
return PrintPagesAsRasterPdf(page_ranges, page_range_count, print_settings,
pdf_print_settings);
}
return pp::Resource();
}
pp::Buffer_Dev PDFiumEngine::PrintPagesAsRasterPdf(
const PP_PrintPageNumberRange_Dev* page_ranges,
uint32_t page_range_count,
const PP_PrintSettings_Dev& print_settings,
const PP_PdfPrintSettings_Dev& pdf_print_settings) {
DCHECK(page_range_count);
// If document is not downloaded yet, disable printing.
if (doc() && !doc_loader_->IsDocumentComplete())
return pp::Buffer_Dev();
KillFormFocus();
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
SetLastInstance(client_->GetPluginInstance());
#endif
return ConvertPdfToBufferDev(
print_.PrintPagesAsPdf(page_ranges, page_range_count, print_settings,
pdf_print_settings, /*raster=*/true));
}
pp::Buffer_Dev PDFiumEngine::PrintPagesAsPdf(
const PP_PrintPageNumberRange_Dev* page_ranges,
uint32_t page_range_count,
const PP_PrintSettings_Dev& print_settings,
const PP_PdfPrintSettings_Dev& pdf_print_settings) {
DCHECK(page_range_count);
DCHECK(doc());
KillFormFocus();
std::vector<uint32_t> page_numbers =
PDFiumPrint::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();
}
return ConvertPdfToBufferDev(
print_.PrintPagesAsPdf(page_ranges, page_range_count, print_settings,
pdf_print_settings, /*raster=*/false));
}
pp::Buffer_Dev PDFiumEngine::ConvertPdfToBufferDev(
const std::vector<uint8_t>& pdf_data) {
pp::Buffer_Dev buffer;
if (!pdf_data.empty()) {
buffer = pp::Buffer_Dev(GetPluginInstance(), pdf_data.size());
if (!buffer.is_null())
memcpy(buffer.data(), pdf_data.data(), pdf_data.size());
}
return buffer;
}
void PDFiumEngine::KillFormFocus() {
FORM_ForceToKillFocus(form());
SetInFormTextArea(false);
}
void PDFiumEngine::UpdateFocus(bool has_focus) {
base::AutoReset<bool> updating_focus_guard(&updating_focus_, true);
if (has_focus && !IsReadOnly()) {
UpdateFocusItemType(last_focused_item_type_);
if (focus_item_type_ == FocusElementType::kPage &&
PageIndexInBounds(last_focused_page_) &&
last_focused_annot_index_ != -1) {
ScopedFPDFAnnotation last_focused_annot(FPDFPage_GetAnnot(
pages_[last_focused_page_]->GetPage(), last_focused_annot_index_));
if (last_focused_annot) {
FPDF_BOOL ret = FORM_SetFocusedAnnot(form(), last_focused_annot.get());
DCHECK(ret);
}
}
} else {
last_focused_item_type_ = focus_item_type_;
if (focus_item_type_ == FocusElementType::kDocument) {
UpdateFocusItemType(FocusElementType::kNone);
} else if (focus_item_type_ == FocusElementType::kPage) {
FPDF_ANNOTATION last_focused_annot = nullptr;
FPDF_BOOL ret = FORM_GetFocusedAnnot(form(), &last_focused_page_,
&last_focused_annot);
if (ret && PageIndexInBounds(last_focused_page_) && last_focused_annot) {
last_focused_annot_index_ = FPDFPage_GetAnnotIndex(
pages_[last_focused_page_]->GetPage(), last_focused_annot);
} else {
last_focused_annot_index_ = -1;
}
FPDFPage_CloseAnnot(last_focused_annot);
}
KillFormFocus();
}
}
PP_PrivateAccessibilityFocusInfo PDFiumEngine::GetFocusInfo() {
PP_PrivateAccessibilityFocusInfo focus_info = {
PP_PrivateFocusObjectType::PP_PRIVATEFOCUSOBJECT_NONE, 0, 0};
switch (focus_item_type_) {
case FocusElementType::kNone: {
break;
}
case FocusElementType::kPage: {
int page_index = -1;
FPDF_ANNOTATION focused_annot = nullptr;
FPDF_BOOL ret = FORM_GetFocusedAnnot(form(), &page_index, &focused_annot);
DCHECK(ret);
if (PageIndexInBounds(page_index) && focused_annot) {
PP_PrivateFocusObjectType type =
GetAnnotationFocusType(FPDFAnnot_GetSubtype(focused_annot));
int annot_index = FPDFPage_GetAnnotIndex(pages_[page_index]->GetPage(),
focused_annot);
if (type != PP_PrivateFocusObjectType::PP_PRIVATEFOCUSOBJECT_NONE &&
annot_index >= 0) {
focus_info.focused_object_type = type;
focus_info.focused_object_page_index = page_index;
focus_info.focused_annotation_index_in_page = annot_index;
}
}
FPDFPage_CloseAnnot(focused_annot);
break;
}
case FocusElementType::kDocument: {
focus_info.focused_object_type =
PP_PrivateFocusObjectType::PP_PRIVATEFOCUSOBJECT_DOCUMENT;
break;
}
}
return focus_info;
}
uint32_t PDFiumEngine::GetLoadedByteSize() {
return doc_loader_->GetDocumentSize();
}
bool PDFiumEngine::ReadLoadedBytes(uint32_t length, void* buffer) {
DCHECK_LE(length, GetLoadedByteSize());
return doc_loader_->GetBlock(0, length, buffer);
}
void PDFiumEngine::SetFormSelectedText(FPDF_FORMHANDLE form_handle,
FPDF_PAGE page) {
base::string16 selected_form_text16 = CallPDFiumWideStringBufferApi(
base::BindRepeating(&FORM_GetSelectedText, form_handle, page),
/*check_expected_size=*/false);
// If form selected text is empty and there was no previous form text
// selection, exit early because nothing has changed.
if (selected_form_text16.empty() && selected_form_text_.empty())
return;
// 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_);
client_->SetSelectedText(selected_form_text_);
}
}
void PDFiumEngine::PrintEnd() {
FORM_DoDocumentAAction(form(), FPDFDOC_AACTION_DP);
}
PDFiumPage::Area PDFiumEngine::GetCharIndex(const gfx::Point& point,
int* page_index,
int* char_index,
int* form_type,
PDFiumPage::LinkTarget* target) {
int page = -1;
gfx::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, layout_.options().default_page_orientation(), char_index,
form_type, target);
return (client_->IsPrintPreview() && result == PDFiumPage::WEBLINK_AREA)
? PDFiumPage::NONSELECTABLE_AREA
: result;
}
bool PDFiumEngine::OnMouseDown(const MouseInputEvent& event) {
MouseInputEvent normalized_event = NormalizeMouseEvent(event);
if (normalized_event.GetButton() == InputEventMouseButtonType::kLeft)
return OnLeftMouseDown(normalized_event);
if (normalized_event.GetButton() == InputEventMouseButtonType::kMiddle)
return OnMiddleMouseDown(normalized_event);
if (normalized_event.GetButton() == InputEventMouseButtonType::kRight)
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));
if (handling_long_press_)
client_->NotifyTouchSelectionOccurred();
}
bool PDFiumEngine::OnLeftMouseDown(const 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;
gfx::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) {
UpdateFocusItemType(FocusElementType::kPage);
last_focused_page_ = page_index;
double page_x;
double page_y;
DeviceToPage(page_index, point, &page_x, &page_y);
if (form_type != FPDF_FORMFIELD_UNKNOWN) {
// FORM_OnLButton*() will trigger a callback to
// OnFocusedAnnotationUpdated() which will call SetInFormTextArea().
// 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();
}
FPDF_PAGE page = pages_[page_index]->GetPage();
if (event.GetClickCount() == 1) {
FORM_OnLButtonDown(form(), page, event.GetModifiers(), page_x, page_y);
} else if (event.GetClickCount() == 2) {
FORM_OnLButtonDoubleClick(form(), page, event.GetModifiers(), page_x,
page_y);
}
if (form_type != FPDF_FORMFIELD_UNKNOWN)
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 MouseInputEvent& event) {
SetMouseLeftButtonDown(false);
mouse_middle_button_down_ = true;
mouse_middle_button_last_position_ = event.GetPosition();
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;
if (kViewerImplementedPanning) {
// Switch to hand cursor when panning.
client_->UpdateCursor(PP_CURSORTYPE_HAND);
}
// Prevent middle mouse button from selecting texts.
return false;
}
bool PDFiumEngine::OnRightMouseDown(const MouseInputEvent& event) {
DCHECK_EQ(InputEventMouseButtonType::kRight, event.GetButton());
gfx::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);
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, &page_x, &page_y);
page = pages_[page_index]->GetPage();
}
// 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) {
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<gfx::Rect> selection_rect_vector =
GetAllScreenRectsUnion(selection_, GetVisibleRect().origin());
for (const auto& rect : selection_rect_vector) {
if (rect.Contains(point))
return false;
}
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
return true;
}
bool PDFiumEngine::NavigateToLinkDestination(
PDFiumPage::Area area,
const PDFiumPage::LinkTarget& target,
WindowOpenDisposition disposition) {
if (area == PDFiumPage::WEBLINK_AREA) {
client_->NavigateTo(target.url, disposition);
SetInFormTextArea(false);
return true;
}
if (area == PDFiumPage::DOCLINK_AREA) {
if (!PageIndexInBounds(target.page))
return true;
if (disposition == WindowOpenDisposition::CURRENT_TAB) {
client_->NavigateToDestination(
target.page, base::OptionalOrNullptr(target.x_in_pixels),
base::OptionalOrNullptr(target.y_in_pixels),
base::OptionalOrNullptr(target.zoom));
} else {
std::string parameters = base::StringPrintf("#page=%d", target.page + 1);
parameters += base::StringPrintf(
"&zoom=%d,%d,%d", static_cast<int>(target.zoom.value_or(1.0) * 100),
static_cast<int>(target.x_in_pixels.value_or(0)),
static_cast<int>(target.y_in_pixels.value_or(0)));
client_->NavigateTo(parameters, disposition);
}
SetInFormTextArea(false);
return true;
}
return false;
}
bool PDFiumEngine::OnMouseUp(const MouseInputEvent& event) {
if (event.GetButton() != InputEventMouseButtonType::kLeft &&
event.GetButton() != InputEventMouseButtonType::kMiddle) {
return false;
}
if (event.GetButton() == InputEventMouseButtonType::kLeft)
SetMouseLeftButtonDown(false);
else if (event.GetButton() == InputEventMouseButtonType::kMiddle)
mouse_middle_button_down_ = false;
int page_index = -1;
int char_index = -1;
int form_type = FPDF_FORMFIELD_UNKNOWN;
PDFiumPage::LinkTarget target;
gfx::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)) {
uint32_t modifiers = event.GetModifiers();
bool middle_button = !!(modifiers & kInputEventModifierMiddleButtonDown);
bool alt_key = !!(modifiers & kInputEventModifierAltKey);
bool ctrl_key = !!(modifiers & kInputEventModifierControlKey);
bool meta_key = !!(modifiers & kInputEventModifierMetaKey);
bool shift_key = !!(modifiers & kInputEventModifierShiftKey);
WindowOpenDisposition disposition = ui::DispositionFromClick(
middle_button, alt_key, ctrl_key, meta_key, shift_key);
if (NavigateToLinkDestination(area, target, disposition))
return true;
}
if (event.GetButton() == InputEventMouseButtonType::kMiddle) {
if (kViewerImplementedPanning) {
// Update the cursor when panning stops.
client_->UpdateCursor(DetermineCursorType(area, form_type));
}
// Prevent middle mouse button from selecting texts.
return false;
}
if (page_index != -1) {
double page_x;
double page_y;
DeviceToPage(page_index, point, &page_x, &page_y);
FORM_OnLButtonUp(form(), pages_[page_index]->GetPage(),
event.GetModifiers(), page_x, page_y);
}
if (!selecting_)
return false;
SetSelecting(false);
return true;
}
bool PDFiumEngine::OnMouseMove(const MouseInputEvent& event) {
int page_index = -1;
int char_index = -1;
int form_type = FPDF_FORMFIELD_UNKNOWN;
PDFiumPage::LinkTarget target;
gfx::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_) {
client_->UpdateCursor(DetermineCursorType(area, form_type));
if (page_index != -1) {
double page_x;
double page_y;
DeviceToPage(page_index, point, &page_x, &page_y);
FORM_OnMouseMove(form(), pages_[page_index]->GetPage(), 0, page_x,
page_y);
}
UpdateLinkUnderCursor(GetLinkAtPosition(point));
// 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_focused_page_ != -1) {
SetFormSelectedText(form(), pages_[last_focused_page_]->GetPage());
}
if (kViewerImplementedPanning && mouse_middle_button_down_) {
// Subtract (origin - destination) so delta is already the delta for
// moving the page, rather than the delta the mouse moved.
// GetMovement() does not work here, as small mouse movements are
// considered zero.
gfx::Vector2d page_position_delta =
mouse_middle_button_last_position_ - event.GetPosition();
if (page_position_delta.x() != 0 || page_position_delta.y() != 0) {
client_->ScrollBy(page_position_delta);
mouse_middle_button_last_position_ = event.GetPosition();
}
}
// 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);
}
PP_CursorType_Dev PDFiumEngine::DetermineCursorType(PDFiumPage::Area area,
int form_type) const {
if (kViewerImplementedPanning && mouse_middle_button_down_) {
return PP_CURSORTYPE_HAND;
}
switch (area) {
case PDFiumPage::TEXT_AREA:
return PP_CURSORTYPE_IBEAM;
case PDFiumPage::WEBLINK_AREA:
case PDFiumPage::DOCLINK_AREA:
return PP_CURSORTYPE_HAND;
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:
return PP_CURSORTYPE_HAND;
case FPDF_FORMFIELD_TEXTFIELD:
return PP_CURSORTYPE_IBEAM;
#if defined(PDF_ENABLE_XFA)
case FPDF_FORMFIELD_XFA_CHECKBOX:
case FPDF_FORMFIELD_XFA_COMBOBOX:
case FPDF_FORMFIELD_XFA_IMAGEFIELD:
case FPDF_FORMFIELD_XFA_LISTBOX:
case FPDF_FORMFIELD_XFA_PUSHBUTTON:
case FPDF_FORMFIELD_XFA_SIGNATURE:
return PP_CURSORTYPE_HAND;
case FPDF_FORMFIELD_XFA_TEXTFIELD:
return PP_CURSORTYPE_IBEAM;
#endif
default:
return PP_CURSORTYPE_POINTER;
}
}
}
void PDFiumEngine::OnMouseEnter(const MouseInputEvent& event) {
if (event.GetModifiers() & kInputEventModifierMiddleButtonDown) {
if (!mouse_middle_button_down_) {
mouse_middle_button_down_ = true;
mouse_middle_button_last_position_ = event.GetPosition();
}
} else {
if (mouse_middle_button_down_) {
mouse_middle_button_down_ = false;
}
}
}
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;
const int last_page_index = selection_.back().page_index();
const int last_char_index = selection_.back().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;
}
selection_.back().SetCharCount(count);
} else if (last_page_index < page_index) {
// Selecting into the next page.
// Save the current last selection for use below.
// Warning: Do not use references / pointers into |selection_|, as the code
// below can modify |selection_| and invalidate those references / pointers.
const size_t last_selection_index = selection_.size() - 1;
// 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();
selection_[last_selection_index].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.
selection_.back().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 KeyboardInputEvent& event) {
// Handle tab events first as we might need to transition focus to an
// annotation in PDF.
if (event.GetKeyCode() == FWL_VKEY_Tab)
return HandleTabEvent(event.GetModifiers());
if (last_focused_page_ == -1)
return false;
bool rv = !!FORM_OnKeyDown(form(), pages_[last_focused_page_]->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());
KeyboardInputEvent synthesized(InputEventType::kChar, event.GetTimeStamp(),
event.GetModifiers(), event.GetKeyCode(),
str);
OnChar(synthesized);
}
#if !defined(OS_MAC)
// macOS doesn't have keyboard-triggered context menus.
// Scroll focused annotation into view when context menu is invoked through
// keyboard <Shift-F10>.
if (event.GetKeyCode() == FWL_VKEY_F10 &&
(event.GetModifiers() & kInputEventModifierShiftKey)) {
DCHECK(!rv);
ScrollFocusedAnnotationIntoView();
}
#endif
return rv;
}
bool PDFiumEngine::OnKeyUp(const KeyboardInputEvent& event) {
if (last_focused_page_ == -1)
return false;
// Check if form text selection needs to be updated.
FPDF_PAGE page = pages_[last_focused_page_]->GetPage();
if (in_form_text_area_)
SetFormSelectedText(form(), page);
return !!FORM_OnKeyUp(form(), page, event.GetKeyCode(), event.GetModifiers());
}
bool PDFiumEngine::OnChar(const KeyboardInputEvent& event) {
if (last_focused_page_ == -1)
return false;
base::string16 str = base::UTF8ToUTF16(event.GetKeyChar());
bool rv = !!FORM_OnChar(form(), pages_[last_focused_page_]->GetPage(), str[0],
event.GetModifiers());
// Scroll editable form text into view on char events. We should not scroll
// focused annotation on escape char event since escape char is used to
// dismiss focus from form controls.
if (rv && editable_form_text_area_ && event.GetKeyCode() != ui::VKEY_ESCAPE) {
ScrollFocusedAnnotationIntoView();
}
return rv;
}
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()) {
client_->NotifyNumberOfFindResultsChanged(0, true);
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_;
}
search_in_progress_ = true;
}
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.
// The extra parens suppress a -Wunreachable-code warning.
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) {
search_in_progress_ = false;
// Send the final notification.
client_->NotifyNumberOfFindResultsChanged(find_results_.size(), true);
return;
}
// In unit tests, PPAPI is not initialized, so just call ContinueFind()
// directly.
if (doc_loader_set_for_testing_) {
ContinueFind(case_sensitive ? 1 : 0);
} else {
client_->ScheduleTaskOnMainThread(
base::TimeDelta(),
base::BindOnce(&PDFiumEngine::ContinueFind,
find_weak_factory_.GetWeakPtr()),
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());
// Various types of quotions marks need to be converted to the simple ASCII
// version for searching to get better matching.
base::string16 adjusted_term = term;
for (base::char16& c : adjusted_term)
c = SimplifyForSearch(c);
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;
base::string16 page_text;
PDFiumAPIStringBufferAdapter<base::string16> api_string_adapter(
&page_text, text_length, 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, data);
api_string_adapter.Close(written);
base::string16 adjusted_page_text;
adjusted_page_text.reserve(page_text.size());
// Values in |removed_indices| are in the adjusted text index space and
// indicate a character was removed from the page text before the given
// index. If multiple characters are removed in a row then there will be
// multiple entries with the same value.
std::vector<size_t> removed_indices;
// When walking through the page text collapse any whitespace regions,
// including \r and \n, down to a single ' ' character. This code does
// not use base::CollapseWhitespace(), because that function does not
// return where the collapsing occurs, but uses the same underlying list of
// whitespace characters. Calculating where the collapsed regions are after
// the fact is as complex as collapsing them manually.
for (size_t i = 0; i < page_text.size(); i++) {
base::char16 c = page_text[i];
// Collapse whitespace regions by inserting a ' ' into the
// adjusted text and recording any removed whitespace indices as preceding
// it.
if (base::IsUnicodeWhitespace(c)) {
size_t whitespace_region_begin = i;
while (i < page_text.size() && base::IsUnicodeWhitespace(page_text[i]))
++i;
size_t count = i - whitespace_region_begin - 1;
removed_indices.insert(removed_indices.end(), count,
adjusted_page_text.size());
adjusted_page_text.push_back(' ');
if (i >= page_text.size())
break;
c = page_text[i];
}
if (IsIgnorableCharacter(c))
removed_indices.push_back(adjusted_page_text.size());
else
adjusted_page_text.push_back(SimplifyForSearch(c));
}
std::vector<PDFEngine::Client::SearchStringResult> results =
client_->SearchString(adjusted_page_text.c_str(), adjusted_term.c_str(),
case_sensitive);
for (const auto& result : results) {
// Need to convert from adjusted page text start to page text start, by
// incrementing for all the characters adjusted before it in the string.
auto removed_indices_begin = std::upper_bound(
removed_indices.begin(), removed_indices.end(), result.start_index);
size_t page_text_result_start_index =
result.start_index +
std::distance(removed_indices.begin(), removed_indices_begin);
// Need to convert the adjusted page length into a page text length, since
// the matching range may have adjusted characters within it. This
// conversion only cares about skipped characters in the result interval.
auto removed_indices_end =
std::upper_bound(removed_indices_begin, removed_indices.end(),
result.start_index + result.length);
int term_removed_count =
std::distance(removed_indices_begin, removed_indices_end);
int page_text_result_length = result.length + term_removed_count;
// Need to map the indexes from the page text, which may have generated
// characters like space etc, to character indices from the page.
int text_to_start_searching_from = FPDFText_GetTextIndexFromCharIndex(
pages_[current_page]->GetTextPage(), character_to_start_searching_from);
int temp_start =
page_text_result_start_index + text_to_start_searching_from;
int start = FPDFText_GetCharIndexFromTextIndex(
pages_[current_page]->GetTextPage(), temp_start);
int end = FPDFText_GetCharIndexFromTextIndex(
pages_[current_page]->GetTextPage(),
temp_start + page_text_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 + page_text_result_length == original_text_length) {
DCHECK_EQ(-1, end);
end = original_text_length;
}
DCHECK_LT(start, end);
DCHECK_EQ(term.size() + term_removed_count,
static_cast<size_t>(end - start));
AddFindResult(PDFiumRange(pages_[current_page].get(), start, end - start));
}
}
void PDFiumEngine::AddFindResult(const PDFiumRange& result) {
bool first_result = find_results_.empty();
// 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);
if (first_result) {
DCHECK(!resume_find_index_);
DCHECK(!current_find_index_);
SelectFindResult(/*forward=*/true);
}
}
bool PDFiumEngine::SelectFindResult(bool forward) {
if (find_results_.empty())
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_) {
new_index = resume_find_index_.value();
resume_find_index_.reset();
} else if (current_find_index_) {
size_t current_index = current_find_index_.value();
if ((forward && current_index >= last_index) ||
(!forward && current_index == 0)) {
current_find_index_.reset();
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_ = 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_.value()]);
// If the result is not in view, scroll to it.
gfx::Rect bounding_rect;
gfx::Rect visible_rect = GetVisibleRect();
// TODO(crbug.com/1108574): Remove after fixing the issue.
size_t find_results_size = find_results_.size();
base::debug::Alias(&find_results_size);
size_t current_find_index_value = current_find_index_.value();
base::debug::Alias(&current_find_index_value);
// Use zoom of 1.0 since |visible_rect| is without zoom.
const std::vector<gfx::Rect>& rects =
find_results_[current_find_index_.value()].GetScreenRects(
gfx::Point(), 1.0, layout_.options().default_page_orientation());
for (const auto& rect : rects)
bounding_rect.Union(rect);
if (!visible_rect.Contains(bounding_rect)) {
gfx::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_.value());
if (!search_in_progress_)
client_->NotifyNumberOfFindResultsChanged(find_results_.size(), true);
return true;
}
void PDFiumEngine::StopFind() {
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
selecting_ = false;
find_results_.clear();
search_in_progress_ = false;
next_page_to_search_ = -1;
last_page_to_search_ = -1;
last_character_index_to_search_ = -1;
current_find_index_.reset();
current_find_text_.clear();
UpdateTickMarks();
find_weak_factory_.InvalidateWeakPtrs();
}
std::vector<gfx::Rect> PDFiumEngine::GetAllScreenRectsUnion(
const std::vector<PDFiumRange>& rect_range,
const gfx::Point& point) const {
std::vector<gfx::Rect> rect_vector;
rect_vector.reserve(rect_range.size());
for (const auto& range : rect_range) {
gfx::Rect result_rect;
const std::vector<gfx::Rect>& rects = range.GetScreenRects(
point, current_zoom_, layout_.options().default_page_orientation());
for (const auto& rect : rects)
result_rect.Union(rect);
rect_vector.push_back(result_rect);
}
return rect_vector;
}
void PDFiumEngine::UpdateTickMarks() {
std::vector<gfx::Rect> tickmarks =
GetAllScreenRectsUnion(find_results_, gfx::Point());
client_->UpdateTickMarks(tickmarks);
}
void PDFiumEngine::ZoomUpdated(double new_zoom_level) {
CancelPaints();
current_zoom_ = new_zoom_level;
CalculateVisiblePages();
UpdateTickMarks();
}
void PDFiumEngine::RotateClockwise() {
desired_layout_options_.RotatePagesClockwise();
ProposeNextDocumentLayout();
}
void PDFiumEngine::RotateCounterclockwise() {
desired_layout_options_.RotatePagesCounterclockwise();
ProposeNextDocumentLayout();
}
bool PDFiumEngine::IsReadOnly() const {
return read_only_;
}
void PDFiumEngine::SetReadOnly(bool enable) {
read_only_ = enable;
// Restore form highlights.
if (!read_only_) {
FPDF_SetFormFieldHighlightAlpha(form(), kFormHighlightAlpha);
return;
}
// Hide form highlights.
FPDF_SetFormFieldHighlightAlpha(form(), /*alpha=*/0);
KillFormFocus();
// Unselect text.
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
}
void PDFiumEngine::SetTwoUpView(bool enable) {
desired_layout_options_.set_two_up_view_enabled(enable);
ProposeNextDocumentLayout();
}
void PDFiumEngine::DisplayAnnotations(bool display) {
if (render_annots_ == display)
return;
render_annots_ = display;
InvalidateAllPages();
}
void PDFiumEngine::InvalidateAllPages() {
CancelPaints();
StopFind();
DCHECK(document_loaded_);
RefreshCurrentDocumentLayout();
client_->Invalidate(gfx::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_;
}
bool PDFiumEngine::HasEditableText() {
DCHECK(CanEditText());
if (last_focused_page_ == -1)
return false;
FPDF_PAGE page = pages_[last_focused_page_]->GetPage();
// If the return value is 2, that corresponds to "\0\0".
return FORM_GetFocusedText(form(), page, nullptr, 0) > 2;
}
void PDFiumEngine::ReplaceSelection(const std::string& text) {
DCHECK(CanEditText());
if (last_focused_page_ != -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_focused_page_]->GetPage(),
text_pdf_wide);
}
}
bool PDFiumEngine::CanUndo() {
if (last_focused_page_ == -1)
return false;
return !!FORM_CanUndo(form(), pages_[last_focused_page_]->GetPage());
}
bool PDFiumEngine::CanRedo() {
if (last_focused_page_ == -1)
return false;
return !!FORM_CanRedo(form(), pages_[last_focused_page_]->GetPage());
}
void PDFiumEngine::Undo() {
if (last_focused_page_ != -1)
FORM_Undo(form(), pages_[last_focused_page_]->GetPage());
}
void PDFiumEngine::Redo() {
if (last_focused_page_ != -1)
FORM_Redo(form(), pages_[last_focused_page_]->GetPage());
}
void PDFiumEngine::HandleAccessibilityAction(
const PP_PdfAccessibilityActionData& action_data) {
switch (action_data.action) {
case PP_PdfAccessibilityAction::PP_PDF_SCROLL_TO_MAKE_VISIBLE: {
ScrollBasedOnScrollAlignment(RectFromPPRect(action_data.target_rect),
action_data.horizontal_scroll_alignment,
action_data.vertical_scroll_alignment);
break;
}
case PP_PdfAccessibilityAction::PP_PDF_DO_DEFAULT_ACTION: {
if (PageIndexInBounds(action_data.page_index)) {
if (action_data.annotation_type ==
PP_PdfAccessibilityAnnotationType::PP_PDF_LINK) {
PDFiumPage::LinkTarget target;
PDFiumPage::Area area =
pages_[action_data.page_index]->GetLinkTargetAtIndex(
action_data.annotation_index, &target);
NavigateToLinkDestination(area, target,
WindowOpenDisposition::CURRENT_TAB);
}
}
break;
}
case PP_PdfAccessibilityAction::PP_PDF_SCROLL_TO_GLOBAL_POINT: {
ScrollToGlobalPoint(RectFromPPRect(action_data.target_rect),
PointFromPPPoint(action_data.target_point));
break;
}
case PP_PdfAccessibilityAction::PP_PDF_SET_SELECTION: {
if (IsPageCharacterIndexInBounds(action_data.selection_start_index) &&
IsPageCharacterIndexInBounds(action_data.selection_end_index)) {
SetSelection(action_data.selection_start_index,
action_data.selection_end_index);
gfx::Rect target_rect = RectFromPPRect(action_data.target_rect);
if (GetVisibleRect().Contains(target_rect))
return;
client_->ScrollBy(GetScreenRect(target_rect).OffsetFromOrigin());
}
break;
}
default:
NOTREACHED();
break;
}
}
std::string PDFiumEngine::GetLinkAtPosition(const gfx::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 {
// No |permissions_| means no restrictions.
if (!permissions_)
return true;
return permissions_->HasPermission(permission);
}
void PDFiumEngine::SelectAll() {
if (in_form_text_area_ || IsReadOnly())
return;
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
for (const auto& page : pages_) {
if (page->available())
selection_.push_back(PDFiumRange(page.get(), 0, page->GetCharCount()));
}
}
const std::vector<DocumentAttachmentInfo>&
PDFiumEngine::GetDocumentAttachmentInfoList() const {
DCHECK(document_loaded_);
return doc_attachment_info_list_;
}
std::vector<uint8_t> PDFiumEngine::GetAttachmentData(size_t index) {
DCHECK_LT(index, doc_attachment_info_list_.size());
DCHECK(doc_attachment_info_list_[index].is_readable);
unsigned long length_bytes = doc_attachment_info_list_[index].size_bytes;
DCHECK_NE(length_bytes, 0u);
FPDF_ATTACHMENT attachment = FPDFDoc_GetAttachment(doc(), index);
std::vector<uint8_t> content_buf(length_bytes);
unsigned long data_size_bytes;
bool is_attachment_readable = FPDFAttachment_GetFile(
attachment, content_buf.data(), length_bytes, &data_size_bytes);
if (!is_attachment_readable || length_bytes != data_size_bytes) {
NOTREACHED();
return std::vector<uint8_t>();
}
return content_buf;
}
const DocumentMetadata& PDFiumEngine::GetDocumentMetadata() const {
DCHECK(document_loaded_);
return doc_metadata_;
}
int PDFiumEngine::GetNumberOfPages() const {
return pages_.size();
}
base::Value PDFiumEngine::GetBookmarks() {
base::Value dict = TraverseBookmarks(nullptr, 0);
DCHECK(dict.is_dict());
// The root bookmark contains no useful information.
base::Value* children = dict.FindListKey("children");
DCHECK(children);
return std::move(*children);
}
base::Value PDFiumEngine::TraverseBookmarks(FPDF_BOOKMARK bookmark,
unsigned int depth) {
base::Value dict(base::Value::Type::DICTIONARY);
base::string16 title = CallPDFiumWideStringBufferApi(
base::BindRepeating(&FPDFBookmark_GetTitle, bookmark),
/*check_expected_size=*/true);
dict.SetStringKey("title", title);
FPDF_DEST dest = FPDFBookmark_GetDest(doc(), bookmark);
// Some bookmarks don't have a page to select.
if (dest) {
int page_index = FPDFDest_GetDestPageIndex(doc(), dest);
if (PageIndexInBounds(page_index)) {
dict.SetIntKey("page", page_index);
base::Optional<float> x;
base::Optional<float> y;
base::Optional<float> zoom;
pages_[page_index]->GetPageDestinationTarget(dest, &x, &y, &zoom);
if (x)
dict.SetIntKey("x", static_cast<int>(x.value()));
if (y)
dict.SetIntKey("y", static_cast<int>(y.value()));
if (zoom)
dict.SetDoubleKey("zoom", zoom.value());
}
} else {
// Extract URI for bookmarks linking to an external page.
FPDF_ACTION action = FPDFBookmark_GetAction(bookmark);
std::string uri = CallPDFiumStringBufferApi(
base::BindRepeating(&FPDFAction_GetURIPath, doc(), action),
/*check_expected_size=*/true);
if (!uri.empty())
dict.SetStringKey("uri", uri);
}
base::Value children(base::Value::Type::LIST);
// Don't trust PDFium to handle circular bookmarks.
constexpr unsigned int kMaxDepth = 128;
if (depth < kMaxDepth) {
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::Contains(seen_bookmarks, child_bookmark))
break;
seen_bookmarks.insert(child_bookmark);
children.Append(TraverseBookmarks(child_bookmark, depth + 1));
}
}
dict.SetKey("children", std::move(children));
return dict;
}
void PDFiumEngine::ScrollBasedOnScrollAlignment(
const gfx::Rect& scroll_rect,
const PP_PdfAccessibilityScrollAlignment& horizontal_scroll_alignment,
const PP_PdfAccessibilityScrollAlignment& vertical_scroll_alignment) {
gfx::Vector2d scroll_offset = GetScreenRect(scroll_rect).OffsetFromOrigin();
switch (horizontal_scroll_alignment) {
case PP_PdfAccessibilityScrollAlignment::PP_PDF_SCROLL_ALIGNMENT_RIGHT:
scroll_offset.set_x(scroll_offset.x() - plugin_size_.width());
break;
case PP_PDF_SCROLL_ALIGNMENT_CENTER:
scroll_offset.set_x(scroll_offset.x() - (plugin_size_.width() / 2));
break;
case PP_PDF_SCROLL_ALIGNMENT_CLOSEST_EDGE: {
scroll_offset.set_x((std::abs(scroll_offset.x()) <=
std::abs(scroll_offset.x() - plugin_size_.width()))
? scroll_offset.x()
: scroll_offset.x() - plugin_size_.width());
break;
}
case PP_PDF_SCROLL_NONE:
scroll_offset.set_x(0);
break;
case PP_PDF_SCROLL_ALIGNMENT_LEFT:
case PP_PDF_SCROLL_ALIGNMENT_TOP:
case PP_PDF_SCROLL_ALIGNMENT_BOTTOM:
default:
break;
}
switch (vertical_scroll_alignment) {
case PP_PDF_SCROLL_ALIGNMENT_BOTTOM:
scroll_offset.set_y(scroll_offset.y() - plugin_size_.height());
break;
case PP_PDF_SCROLL_ALIGNMENT_CENTER:
scroll_offset.set_y(scroll_offset.y() - (plugin_size_.height() / 2));
break;
case PP_PDF_SCROLL_ALIGNMENT_CLOSEST_EDGE: {
scroll_offset.set_y((std::abs(scroll_offset.y()) <=
std::abs(scroll_offset.y() - plugin_size_.height()))
? scroll_offset.y()
: scroll_offset.y() - plugin_size_.height());
break;
}
case PP_PDF_SCROLL_NONE:
scroll_offset.set_y(0);
break;
case PP_PDF_SCROLL_ALIGNMENT_TOP:
case PP_PDF_SCROLL_ALIGNMENT_LEFT:
case PP_PDF_SCROLL_ALIGNMENT_RIGHT:
default:
break;
}
client_->ScrollBy(scroll_offset);
}
void PDFiumEngine::ScrollToGlobalPoint(const gfx::Rect& target_rect,
const gfx::Point& global_point) {
gfx::Point scroll_offset = GetScreenRect(target_rect).origin();
client_->ScrollBy(scroll_offset - global_point);
}
base::Optional<PDFEngine::NamedDestination> PDFiumEngine::GetNamedDestination(
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);
}
if (!dest)
return {};
int page = FPDFDest_GetDestPageIndex(doc(), dest);
if (page < 0)
return {};
PDFEngine::NamedDestination result;
result.page = page;
unsigned long view_int =
FPDFDest_GetView(dest, &result.num_params, result.params);
// FPDFDest_GetView() gets the in-page coordinates directly from the PDF
// document. The in-page coordinates need to be transformed into in-screen
// coordinates before getting sent to the viewport.
PDFiumPage* page_ptr = pages_[page].get();
ParamsTransformPageToScreen(view_int, page_ptr, result.params);
if (view_int == PDFDEST_VIEW_XYZ)
result.xyz_params = GetXYZParamsString(dest, page_ptr);
result.view = ConvertViewIntToViewString(view_int);
return result;
}
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_;
}
gfx::Rect PDFiumEngine::GetPageBoundsRect(int index) {
return pages_[index]->rect();
}
gfx::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::HandleLongPress(const TouchInputEvent& event) {
base::AutoReset<bool> handling_long_press_guard(&handling_long_press_, true);
gfx::Point point = gfx::ToRoundedPoint(event.GetTargetTouchPoint());
// Send a fake mouse down to trigger the multi-click selection code.
MouseInputEvent mouse_event(
InputEventType::kMouseDown, event.GetTimeStamp(), event.GetModifiers(),
InputEventMouseButtonType::kLeft, point, 2, point);
OnMouseDown(mouse_event);
}
int PDFiumEngine::GetCharCount(int page_index) {
DCHECK(PageIndexInBounds(page_index));
return pages_[page_index]->GetCharCount();
}
gfx::RectF 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);
}
base::Optional<AccessibilityTextRunInfo> PDFiumEngine::GetTextRunInfo(
int page_index,
int start_char_index) {
DCHECK(PageIndexInBounds(page_index));
auto info = pages_[page_index]->GetTextRunInfo(start_char_index);
if (!client_->IsPrintPreview() && start_char_index >= 0)
pages_[page_index]->LogOverlappingAnnotations();
return info;
}
std::vector<PDFEngine::AccessibilityLinkInfo> PDFiumEngine::GetLinkInfo(
int page_index) {
DCHECK(PageIndexInBounds(page_index));
return pages_[page_index]->GetLinkInfo();
}
std::vector<PDFEngine::AccessibilityImageInfo> PDFiumEngine::GetImageInfo(
int page_index) {
DCHECK(PageIndexInBounds(page_index));
return pages_[page_index]->GetImageInfo();
}
std::vector<PDFEngine::AccessibilityHighlightInfo>
PDFiumEngine::GetHighlightInfo(int page_index) {
DCHECK(PageIndexInBounds(page_index));
return pages_[page_index]->GetHighlightInfo();
}
std::vector<PDFEngine::AccessibilityTextFieldInfo>
PDFiumEngine::GetTextFieldInfo(int page_index) {
DCHECK(PageIndexInBounds(page_index));
return pages_[page_index]->GetTextFieldInfo();
}
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(gfx::Size* size) {
if (pages_.empty())
return false;
gfx::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(size_t num_pages) {
DCHECK_GT(num_pages, 0U);
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());
}
// Create blank pages with the same size as the first page.
gfx::Size page_0_size = GetPageSize(0);
double page_0_width_in_points =
ConvertUnitDouble(page_0_size.width(), kPixelsPerInch, kPointsPerInch);
double page_0_height_in_points =
ConvertUnitDouble(page_0_size.height(), kPixelsPerInch, kPointsPerInch);
for (size_t i = 1; i < num_pages; ++i) {
{
// Add a new page to the document, but delete the FPDF_PAGE object.
ScopedFPDFPage temp_page(FPDFPage_New(doc(), i, page_0_width_in_points,
page_0_height_in_points));
}
auto page = std::make_unique<PDFiumPage>(this, i);
page->MarkAvailable();
pages_.push_back(std::move(page));
}
DCHECK(document_loaded_);
LoadPageInfo();
}
void PDFiumEngine::LoadDocument() {
// Check if the document is ready for loading. If it isn't just bail for now,
// we will call LoadDocument() again later.
if (!doc() && !doc_loader_->IsDocumentComplete()) {
FX_DOWNLOADHINTS& download_hints = document_->download_hints();
if (!FPDFAvail_IsDocAvail(fpdf_availability(), &download_hints))
return;
}
// If we're in the middle of getting a password, just return. We will retry
// loading the document after we get the password anyway.
if (getting_password_)
return;
bool needs_password = false;
if (TryLoadingDoc(std::string(), &needs_password)) {
ContinueLoadingDocument(std::string());
return;
}
if (needs_password)
GetPasswordAndLoad();
else
client_->DocumentLoadFailed();
}
bool PDFiumEngine::TryLoadingDoc(const std::string& password,
bool* needs_password) {
*needs_password = false;
if (doc()) {
// This is probably not necessary, because it should have already been
// called below in the |doc_| initialization path. However, the previous
// call may have failed, so call it again for good measure.
FX_DOWNLOADHINTS& download_hints = document_->download_hints();
FPDFAvail_IsDocAvail(fpdf_availability(), &download_hints);
return true;
}
if (!password.empty())
password_tries_remaining_--;
{
ScopedUnsupportedFeature scoped_unsupported_feature(this);
document_->LoadDocument(password);
}
if (!doc()) {
if (FPDF_GetLastError() == FPDF_ERR_PASSWORD)
*needs_password = true;
return false;
}
// Always call FPDFAvail_IsDocAvail() so PDFium initializes internal data
// structures.
FX_DOWNLOADHINTS& download_hints = document_->download_hints();
FPDFAvail_IsDocAvail(fpdf_availability(), &download_hints);
return true;
}
void PDFiumEngine::GetPasswordAndLoad() {
getting_password_ = true;
DCHECK(!doc());
DCHECK_EQ(static_cast<unsigned long>(FPDF_ERR_PASSWORD), FPDF_GetLastError());
client_->GetDocumentPassword(base::BindOnce(
&PDFiumEngine::OnGetPasswordComplete, weak_factory_.GetWeakPtr()));
}
void PDFiumEngine::OnGetPasswordComplete(const std::string& password) {
getting_password_ = false;
ContinueLoadingDocument(password);
}
void PDFiumEngine::ContinueLoadingDocument(const std::string& password) {
bool needs_password = false;
bool loaded = TryLoadingDoc(password, &needs_password);
bool password_incorrect = !loaded && needs_password && !password.empty();
if (password_incorrect && password_tries_remaining_ > 0) {
GetPasswordAndLoad();
return;
}
if (!doc()) {
client_->DocumentLoadFailed();
return;
}
if (FPDFDoc_GetPageMode(doc()) == PAGEMODE_USEOUTLINES)
client_->DocumentHasUnsupportedFeature("Bookmarks");
permissions_ = std::make_unique<PDFiumPermissions>(doc());
LoadBody();
if (doc_loader_->IsDocumentComplete())
FinishLoadingDocument();
}
void PDFiumEngine::LoadPageInfo() {
RefreshCurrentDocumentLayout();
// TODO(crbug.com/1013800): RefreshCurrentDocumentLayout() should send some
// sort of "current layout changed" notification, instead of proposing a new
// layout. Proposals are never rejected currently, so this is OK for now.
ProposeNextDocumentLayout();
}
void PDFiumEngine::RefreshCurrentDocumentLayout() {
UpdateDocumentLayout(&layout_);
if (!layout_.dirty())
return;
DCHECK_EQ(pages_.size(), layout_.page_count());
for (size_t i = 0; i < layout_.page_count(); ++i) {
// TODO(kmoon): This should be the only place that sets |PDFiumPage::rect_|.
pages_[i]->set_rect(layout_.page_bounds_rect(i));
}
layout_.clear_dirty();
CalculateVisiblePages();
}
void PDFiumEngine::ProposeNextDocumentLayout() {
DocumentLayout next_layout;
next_layout.SetOptions(desired_layout_options_);
UpdateDocumentLayout(&next_layout);
// The time windows between proposal and application may overlap, so we must
// always propose a new layout, regardless of the current layout state.
client_->ProposeDocumentLayout(next_layout);
}
void PDFiumEngine::UpdateDocumentLayout(DocumentLayout* layout) {
std::vector<gfx::Size> page_sizes = LoadPageSizes(layout->options());
if (page_sizes.empty())
return;
if (layout->options().two_up_view_enabled()) {
layout->ComputeTwoUpViewLayout(page_sizes);
} else {
layout->ComputeSingleViewLayout(page_sizes);
}
}
std::vector<gfx::Size> PDFiumEngine::LoadPageSizes(
const DocumentLayout::Options& layout_options) {
std::vector<gfx::Size> page_sizes;
if (!doc_loader_)
return page_sizes;
if (pages_.empty() && document_loaded_)
return page_sizes;
pending_pages_.clear();
size_t new_page_count = FPDF_GetPageCount(doc());
const bool doc_complete = doc_loader_->IsDocumentComplete();
const bool is_linear = IsLinearized();
for (size_t i = 0; i < new_page_count; ++i) {
// Get page availability. If |document_loaded_| == true and the page is not
// new, then the page has been constructed already. Get page availability
// flag from already existing PDFiumPage object. If |document_loaded_| ==
// false or the page is new, then the page may not be fully loaded yet.
bool page_available;
if (document_loaded_ && i < pages_.size()) {
page_available = pages_[i]->available();
} else if (is_linear) {
FX_DOWNLOADHINTS& download_hints = document_->download_hints();
int linear_page_avail =
FPDFAvail_IsPageAvail(fpdf_availability(), i, &download_hints);
page_available = linear_page_avail == PDF_DATA_AVAIL;
} else {
page_available = doc_complete;
}
// TODO(crbug.com/1013800): It'd be better if page size were independent of
// layout options, and handled in the layout code.
gfx::Size size = page_available ? GetPageSizeForLayout(i, layout_options)
: default_page_size_;
EnlargePage(layout_options, i, new_page_count, &size);
page_sizes.push_back(size);
}
// Add new pages. If |document_loaded_| == false, do not mark page as
// available even if |doc_complete| is true because FPDFAvail_IsPageAvail()
// still has to be called for this page, which will be done in
// FinishLoadingDocument().
for (size_t i = pages_.size(); i < new_page_count; ++i) {
auto page = std::make_unique<PDFiumPage>(this, i);
if (document_loaded_ &&
FPDFAvail_IsPageAvail(fpdf_availability(), i, nullptr))
page->MarkAvailable();
pages_.push_back(std::move(page));
}
// Remove pages that do not exist anymore.
if (pages_.size() > new_page_count) {
for (size_t i = new_page_count; i < pages_.size(); ++i)
pages_[i]->Unload();
pages_.resize(new_page_count);
}
return page_sizes;
}
void PDFiumEngine::LoadBody() {
DCHECK(doc());
if (doc_loader_->IsDocumentComplete()) {
LoadForm();
} else if (IsLinearized() && FPDF_GetPageCount(doc()) == 1) {
// If we have only one page we should load form first, because it may be an
// XFA document. And after loading form the page count and its contents may
// be changed.
LoadForm();
if (document_->form_status() == PDF_FORM_NOTAVAIL)
return;
}
LoadPages();
}
void PDFiumEngine::LoadPages() {
if (pages_.empty()) {
if (!doc_loader_->IsDocumentComplete()) {
// Check if the first page is available. In a linearized PDF, that is not
// always page 0. Doing this gives us the default page size, since when
// the document is available, the first page is available as well.
CheckPageAvailable(FPDFAvail_GetFirstPageNum(doc()), &pending_pages_);
}
DCHECK(!document_loaded_);
LoadPageInfo();
}
}
void PDFiumEngine::LoadForm() {
if (form())
return;
DCHECK(doc());
document_->SetFormStatus();
if (document_->form_status() != PDF_FORM_NOTAVAIL ||
doc_loader_->IsDocumentComplete()) {
{
ScopedUnsupportedFeature scoped_unsupported_feature(this);
document_->InitializeForm(&form_filler_);
}
if (form_filler_.script_option() ==
PDFiumFormFiller::ScriptOption::kJavaScriptAndXFA) {
FPDF_LoadXFA(doc());
}
FPDF_SetFormFieldHighlightColor(form(), FPDF_FORMFIELD_UNKNOWN,
kFormHighlightColor);
FPDF_SetFormFieldHighlightAlpha(form(), kFormHighlightAlpha);
if (base::FeatureList::IsEnabled(features::kTabAcrossPDFAnnotations) &&
!client_->IsPrintPreview()) {
static constexpr FPDF_ANNOTATION_SUBTYPE kFocusableAnnotSubtypes[] = {
FPDF_ANNOT_LINK, FPDF_ANNOT_HIGHLIGHT, FPDF_ANNOT_WIDGET};
FPDF_BOOL ret = FPDFAnnot_SetFocusableSubtypes(
form(), kFocusableAnnotSubtypes, base::size(kFocusableAnnotSubtypes));
DCHECK(ret);
}
}
}
bool PDFiumEngine::IsLinearized() {
DCHECK(fpdf_availability());
return FPDFAvail_IsLinearized(fpdf_availability()) == PDF_LINEARIZED;
}
void PDFiumEngine::CalculateVisiblePages() {
// Early return if the PDF isn't being loaded or if we don't have the document
// info yet. The latter is important because otherwise as the PDF is being
// initialized by the renderer there could be races that call this method
// before we get the initial network responses. The document loader depends on
// the list of pending requests to be valid for progressive loading to
// function.
if (!doc_loader_ || pages_.empty())
return;
// Clear pending requests queue, since it may contain requests to the pages
// that are already invisible (after scrolling for example).
pending_pages_.clear();
doc_loader_->ClearPendingRequests();
visible_pages_.clear();
gfx::Rect visible_rect(plugin_size_);
for (int i = 0; i < static_cast<int>(pages_.size()); ++i) {
// Check an entire PageScreenRect, since we might need to repaint side
// borders and shadows even if the page itself is not visible.
// For example, when user use pdf with different page sizes and zoomed in
// outside page area.
if (visible_rect.Intersects(GetPageScreenRect(i))) {
visible_pages_.push_back(i);
CheckPageAvailable(i, &pending_pages_);
} else {
// Need to unload pages when we're not using them, since some PDFs use a
// lot of memory. See http://crbug.com/48791
if (defer_page_unload_) {
deferred_page_unloads_.push_back(i);
} else {
pages_[i]->Unload();
}
}
}
// Any pending highlighting of form fields will be invalid since these are in
// screen coordinates.
form_highlights_.clear();
std::vector<draw_utils::IndexedPage> visible_pages_rects;
visible_pages_rects.reserve(visible_pages_.size());
for (int visible_page_index : visible_pages_) {
visible_pages_rects.emplace_back(visible_page_index,
pages_[visible_page_index]->rect());
}
int most_visible_page =
draw_utils::GetMostVisiblePage(visible_pages_rects, GetVisibleRect());
SetCurrentPage(most_visible_page);
}
bool PDFiumEngine::IsPageVisible(int index) const {
return base::Contains(visible_pages_, index);
}
void PDFiumEngine::ScrollToPage(int page) {
if (!PageIndexInBounds(page))
return;
in_flight_visible_page_ = page;
client_->ScrollToPage(page);
}
bool PDFiumEngine::CheckPageAvailable(int index, std::vector<int>* pending) {
if (!doc())
return false;
const int num_pages = static_cast<int>(pages_.size());
if (index < num_pages && pages_[index]->available())
return true;
FX_DOWNLOADHINTS& download_hints = document_->download_hints();
if (!FPDFAvail_IsPageAvail(fpdf_availability(), index, &download_hints)) {
if (!base::Contains(*pending, index))
pending->push_back(index);
return false;
}
if (index < num_pages)
pages_[index]->MarkAvailable();
if (default_page_size_.IsEmpty())
default_page_size_ = GetPageSize(index);
return true;
}
gfx::Size PDFiumEngine::GetPageSize(int index) {
return GetPageSizeForLayout(index, layout_.options());
}
gfx::Size PDFiumEngine::GetPageSizeForLayout(
int index,
const DocumentLayout::Options& layout_options) {
FS_SIZEF size_in_points;
if (!FPDF_GetPageSizeByIndexF(doc(), index, &size_in_points))
return gfx::Size();
int width_in_pixels = static_cast<int>(
ConvertUnitDouble(size_in_points.width, kPointsPerInch, kPixelsPerInch));
int height_in_pixels = static_cast<int>(
ConvertUnitDouble(size_in_points.height, kPointsPerInch, kPixelsPerInch));
switch (layout_options.default_page_orientation()) {
case PageOrientation::kOriginal:
case PageOrientation::kClockwise180:
// No axis swap needed.
break;
case PageOrientation::kClockwise90:
case PageOrientation::kClockwise270:
// Rotated 90 degrees: swap axes.
std::swap(width_in_pixels, height_in_pixels);
break;
}
return gfx::Size(width_in_pixels, height_in_pixels);
}
draw_utils::PageInsetSizes PDFiumEngine::GetInsetSizes(
const DocumentLayout::Options& layout_options,
size_t page_index,
size_t num_of_pages) const {
DCHECK_LT(page_index, num_of_pages);
if (layout_options.two_up_view_enabled()) {
return draw_utils::GetPageInsetsForTwoUpView(
page_index, num_of_pages, DocumentLayout::kSingleViewInsets,
DocumentLayout::kHorizontalSeparator);
}
return DocumentLayout::kSingleViewInsets;
}
void PDFiumEngine::EnlargePage(const DocumentLayout::Options& layout_options,
size_t page_index,
size_t num_of_pages,
gfx::Size* page_size) const {
draw_utils::PageInsetSizes inset_sizes =
GetInsetSizes(layout_options, page_index, num_of_pages);
page_size->Enlarge(inset_sizes.left + inset_sizes.right,
inset_sizes.top + inset_sizes.bottom);
}
void PDFiumEngine::InsetPage(const DocumentLayout::Options& layout_options,
size_t page_index,
size_t num_of_pages,
double multiplier,
gfx::Rect& rect) const {
draw_utils::PageInsetSizes inset_sizes =
GetInsetSizes(layout_options, page_index, num_of_pages);
rect.Inset(static_cast<int>(ceil(inset_sizes.left * multiplier)),
static_cast<int>(ceil(inset_sizes.top * multiplier)),
static_cast<int>(ceil(inset_sizes.right * multiplier)),
static_cast<int>(ceil(inset_sizes.bottom * multiplier)));
}
base::Optional<size_t> PDFiumEngine::GetAdjacentPageIndexForTwoUpView(
size_t page_index,
size_t num_of_pages) const {
DCHECK_LT(page_index, num_of_pages);
if (!layout_.options().two_up_view_enabled())
return base::nullopt;
int adjacent_page_offset = page_index % 2 ? -1 : 1;
size_t adjacent_page_index = page_index + adjacent_page_offset;
if (adjacent_page_index >= num_of_pages)
return base::nullopt;
return adjacent_page_index;
}
int PDFiumEngine::StartPaint(int page_index, const gfx::Rect& dirty) {
// For the first time we hit paint, do nothing and just record the paint for
// the next callback. This keeps the UI responsive in case the user is doing
// a lot of scrolling.
progressive_paints_.emplace_back(page_index, dirty);
return progressive_paints_.size() - 1;
}
bool PDFiumEngine::ContinuePaint(int progressive_index, SkBitmap& image_data) {
DCHECK_GE(progressive_index, 0);
DCHECK_LT(static_cast<size_t>(progressive_index), progressive_paints_.size());
last_progressive_start_time_ = base::Time::Now();
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
SetLastInstance(client_->GetPluginInstance());
#endif
int page_index = progressive_paints_[progressive_index].page_index();
DCHECK(PageIndexInBounds(page_index));
int rv;
FPDF_PAGE page = pages_[page_index]->GetPage();
if (progressive_paints_[progressive_index].bitmap()) {
rv = FPDF_RenderPage_Continue(page, this);
} else {
int start_x;
int start_y;
int size_x;
int size_y;
gfx::Rect dirty = progressive_paints_[progressive_index].rect();
GetPDFiumRect(page_index, dirty, &start_x, &start_y, &size_x, &size_y);
ScopedFPDFBitmap new_bitmap = CreateBitmap(dirty, image_data);
FPDFBitmap_FillRect(new_bitmap.get(), start_x, start_y, size_x, size_y,
0xFFFFFFFF);
rv = FPDF_RenderPageBitmap_Start(
new_bitmap.get(), page, start_x, start_y, size_x, size_y,
ToPDFiumRotation(layout_.options().default_page_orientation()),
GetRenderingFlags(), this);
progressive_paints_[progressive_index].SetBitmapAndImageData(
std::move(new_bitmap), image_data);
}
return rv != FPDF_RENDER_TOBECONTINUED;
}
void PDFiumEngine::FinishPaint(int progressive_index, SkBitmap& image_data) {
DCHECK_GE(progressive_index, 0);
DCHECK_LT(static_cast<size_t>(progressive_index), progressive_paints_.size());
int page_index = progressive_paints_[progressive_index].page_index();
gfx::Rect dirty_in_screen = progressive_paints_[progressive_index].rect();
int start_x;
int start_y;
int size_x;
int size_y;
FPDF_BITMAP bitmap = progressive_paints_[progressive_index].bitmap();
GetPDFiumRect(page_index, dirty_in_screen, &start_x, &start_y, &size_x,
&size_y);
// Draw the forms.
FPDF_FFLDraw(form(), bitmap, pages_[page_index]->GetPage(), start_x, start_y,
size_x, size_y,
ToPDFiumRotation(layout_.options().default_page_orientation()),
GetRenderingFlags());
FillPageSides(progressive_index);
// Paint the page shadows.
PaintPageShadow(progressive_index, image_data);
DrawSelections(progressive_index, image_data);
form_highlights_.clear();
FPDF_RenderPage_Close(pages_[page_index]->GetPage());
progressive_paints_.erase(progressive_paints_.begin() + progressive_index);
}
void PDFiumEngine::CancelPaints() {
for (const auto& paint : progressive_paints_)
FPDF_RenderPage_Close(pages_[paint.page_index()]->GetPage());
progressive_paints_.clear();
}
void PDFiumEngine::FillPageSides(int progressive_index) {
DCHECK_GE(progressive_index, 0);
DCHECK_LT(static_cast<size_t>(progressive_index), progressive_paints_.size());
int page_index = progressive_paints_[progressive_index].page_index();
gfx::Rect dirty_in_screen = progressive_paints_[progressive_index].rect();
FPDF_BITMAP bitmap = progressive_paints_[progressive_index].bitmap();
draw_utils::PageInsetSizes inset_sizes =
GetInsetSizes(layout_.options(), page_index, pages_.size());
gfx::Rect page_rect = pages_[page_index]->rect();
const bool is_two_up_view = layout_.options().two_up_view_enabled();
if (page_rect.x() > 0 && (!is_two_up_view || page_index % 2 == 0)) {
// If in two-up view, only need to draw the left empty space for left pages
// since the gap between the left and right page will be drawn by the left
// page.
gfx::Rect left_in_screen = GetScreenRect(draw_utils::GetLeftFillRect(
page_rect, inset_sizes, DocumentLayout::kBottomSeparator));
left_in_screen.Intersect(dirty_in_screen);
FPDFBitmap_FillRect(bitmap, left_in_screen.x() - dirty_in_screen.x(),
left_in_screen.y() - dirty_in_screen.y(),
left_in_screen.width(), left_in_screen.height(),
client_->GetBackgroundColor());
}
if (page_rect.right() < layout_.size().width()) {
gfx::Rect right_in_screen = GetScreenRect(draw_utils::GetRightFillRect(
page_rect, inset_sizes, layout_.size().width(),
DocumentLayout::kBottomSeparator));
right_in_screen.Intersect(dirty_in_screen);
FPDFBitmap_FillRect(bitmap, right_in_screen.x() - dirty_in_screen.x(),
right_in_screen.y() - dirty_in_screen.y(),
right_in_screen.width(), right_in_screen.height(),
client_->GetBackgroundColor());
}
gfx::Rect bottom_in_screen;
if (is_two_up_view) {
gfx::Rect page_in_screen = GetScreenRect(page_rect);
bottom_in_screen = draw_utils::GetBottomGapBetweenRects(
page_in_screen.bottom(), dirty_in_screen);
if (page_index % 2 == 1) {
draw_utils::AdjustBottomGapForRightSidePage(page_in_screen.x(),
&bottom_in_screen);
}
bottom_in_screen.Intersect(dirty_in_screen);
} else {
bottom_in_screen = GetScreenRect(draw_utils::GetBottomFillRect(
page_rect, inset_sizes, DocumentLayout::kBottomSeparator));
bottom_in_screen.Intersect(dirty_in_screen);
}
FPDFBitmap_FillRect(bitmap, bottom_in_screen.x() - dirty_in_screen.x(),
bottom_in_screen.y() - dirty_in_screen.y(),
bottom_in_screen.width(), bottom_in_screen.height(),
client_->GetBackgroundColor());
}
void PDFiumEngine::PaintPageShadow(int progressive_index,
SkBitmap& image_data) {
DCHECK_GE(progressive_index, 0);
DCHECK_LT(static_cast<size_t>(progressive_index), progressive_paints_.size());
int page_index = progressive_paints_[progressive_index].page_index();
gfx::Rect dirty_in_screen = progressive_paints_[progressive_index].rect();
gfx::Rect page_rect = pages_[page_index]->rect();
gfx::Rect shadow_rect(page_rect);
InsetPage(layout_.options(), page_index, pages_.size(), /*multiplier=*/-1,
shadow_rect);
// Due to the rounding errors of the GetScreenRect it is possible to get
// different size shadows on the left and right sides even they are defined
// the same. To fix this issue let's calculate shadow rect and then shrink
// it by the size of the shadows.
shadow_rect = GetScreenRect(shadow_rect);
page_rect = shadow_rect;
InsetPage(layout_.options(), page_index, pages_.size(),
/*multiplier=*/current_zoom_, page_rect);
DrawPageShadow(page_rect, shadow_rect, dirty_in_screen, image_data);
}
void PDFiumEngine::DrawSelections(int progressive_index,
SkBitmap& image_data) const {
DCHECK_GE(progressive_index, 0);
DCHECK_LT(static_cast<size_t>(progressive_index), progressive_paints_.size());
int page_index = progressive_paints_[progressive_index].page_index();
gfx::Rect dirty_in_screen = progressive_paints_[progressive_index].rect();
void* region = nullptr;
int stride;
GetRegion(dirty_in_screen.origin(), image_data, region, stride);
std::vector<gfx::Rect> highlighted_rects;
gfx::Rect visible_rect = GetVisibleRect();
for (const auto& range : selection_) {
if (range.page_index() != page_index)
continue;
const std::vector<gfx::Rect>& rects =
range.GetScreenRects(visible_rect.origin(), current_zoom_,
layout_.options().default_page_orientation());
for (const auto& rect : rects) {
gfx::Rect visible_selection = gfx::IntersectRects(rect, dirty_in_screen);
if (visible_selection.IsEmpty())
continue;
visible_selection.Offset(-dirty_in_screen.OffsetFromOrigin());
Highlight(region, stride, visible_selection, kHighlightColorR,
kHighlightColorG, kHighlightColorB, highlighted_rects);
}
}
for (const auto& highlight : form_highlights_) {
gfx::Rect visible_selection =
gfx::IntersectRects(highlight, dirty_in_screen);
if (visible_selection.IsEmpty())
continue;
visible_selection.Offset(-dirty_in_screen.OffsetFromOrigin());
Highlight(region, stride, visible_selection, kHighlightColorR,
kHighlightColorG, kHighlightColorB, highlighted_rects);
}
}
void PDFiumEngine::PaintUnavailablePage(int page_index,
const gfx::Rect& dirty,
SkBitmap& image_data) {
int start_x;
int start_y;
int size_x;
int size_y;
GetPDFiumRect(page_index, dirty, &start_x, &start_y, &size_x, &size_y);
ScopedFPDFBitmap bitmap(CreateBitmap(dirty, image_data));
FPDFBitmap_FillRect(bitmap.get(), start_x, start_y, size_x, size_y,
kPendingPageColor);
gfx::Rect loading_text_in_screen(
pages_[page_index]->rect().width() / 2,
pages_[page_index]->rect().y() + kLoadingTextVerticalOffset, 0, 0);
loading_text_in_screen = GetScreenRect(loading_text_in_screen);
}
int PDFiumEngine::GetProgressiveIndex(int page_index) const {
for (size_t i = 0; i < progressive_paints_.size(); ++i) {
if (progressive_paints_[i].page_index() == page_index)
return i;
}
return -1;
}
ScopedFPDFBitmap PDFiumEngine::CreateBitmap(const gfx::Rect& rect,
SkBitmap& image_data) const {
void* region;
int stride;
GetRegion(rect.origin(), image_data, region, stride);
if (!region)
return nullptr;
return ScopedFPDFBitmap(FPDFBitmap_CreateEx(rect.width(), rect.height(),
FPDFBitmap_BGRx, region, stride));
}
void PDFiumEngine::GetPDFiumRect(int page_index,
const gfx::Rect& rect,
int* start_x,
int* start_y,
int* size_x,
int* size_y) const {
gfx::Rect page_rect = GetScreenRect(pages_[page_index]->rect());
page_rect.Offset(-rect.x(), -rect.y());
*start_x = page_rect.x();
*start_y = page_rect.y();
*size_x = page_rect.width();
*size_y = page_rect.height();
}
int PDFiumEngine::GetRenderingFlags() const {
int flags = FPDF_LCD_TEXT;
if (render_grayscale_)
flags |= FPDF_GRAYSCALE;
if (client_->IsPrintPreview())
flags |= FPDF_PRINTING;
if (render_annots_)
flags |= FPDF_ANNOT;
return flags;
}
gfx::Rect PDFiumEngine::GetVisibleRect() const {
gfx::Rect rv;
rv.set_x(static_cast<int>(position_.x() / current_zoom_));
rv.set_y(static_cast<int>(position_.y() / current_zoom_));
rv.set_width(static_cast<int>(ceil(plugin_size_.width() / current_zoom_)));
rv.set_height(static_cast<int>(ceil(plugin_size_.height() / current_zoom_)));
return rv;
}
gfx::Rect PDFiumEngine::GetPageScreenRect(int page_index) const {
gfx::Rect page_rect = pages_[page_index]->rect();
draw_utils::PageInsetSizes inset_sizes =
GetInsetSizes(layout_.options(), page_index, pages_.size());
int max_page_height = page_rect.height();
base::Optional<size_t> adjacent_page_index =
GetAdjacentPageIndexForTwoUpView(page_index, pages_.size());
if (adjacent_page_index.has_value()) {
max_page_height = std::max(
max_page_height, pages_[adjacent_page_index.value()]->rect().height());
}
return GetScreenRect(draw_utils::GetSurroundingRect(
page_rect.y(), max_page_height, inset_sizes, layout_.size().width(),
DocumentLayout::kBottomSeparator));
}
gfx::Rect PDFiumEngine::GetScreenRect(const gfx::Rect& rect) const {
return draw_utils::GetScreenRect(rect, position_, current_zoom_);
}
void PDFiumEngine::Highlight(void* buffer,
int stride,
const gfx::Rect& rect,
int color_red,
int color_green,
int color_blue,
std::vector<gfx::Rect>& highlighted_rects) const {
if (!buffer)
return;
gfx::Rect new_rect = rect;
for (const auto& highlighted : highlighted_rects)
new_rect.Subtract(highlighted);
if (new_rect.IsEmpty())
return;
std::vector<size_t> overlapping_rect_indices;
for (size_t i = 0; i < highlighted_rects.size(); ++i) {
if (new_rect.Intersects((highlighted_rects)[i]))
overlapping_rect_indices.push_back(i);
}
highlighted_rects.push_back(new_rect);
int l = new_rect.x();
int t = new_rect.y();
int w = new_rect.width();
int h = new_rect.height();
for (int y = t; y < t + h; ++y) {
for (int x = l; x < l + w; ++x) {
bool overlaps = false;
for (size_t i : overlapping_rect_indices) {
const auto& highlighted = (highlighted_rects)[i];
if (highlighted.Contains(x, y)) {
overlaps = true;
break;
}
}
if (overlaps)
continue;
uint8_t* pixel = static_cast<uint8_t*>(buffer) + y * stride + x * 4;
pixel[0] = static_cast<uint8_t>(pixel[0] * (color_blue / 255.0));
pixel[1] = static_cast<uint8_t>(pixel[1] * (color_green / 255.0));
pixel[2] = static_cast<uint8_t>(pixel[2] * (color_red / 255.0));
}
}
}
PDFiumEngine::SelectionChangeInvalidator::SelectionChangeInvalidator(
PDFiumEngine* engine)
: engine_(engine),
previous_origin_(engine_->GetVisibleRect().origin()),
old_selections_(GetVisibleSelections()) {}
PDFiumEngine::SelectionChangeInvalidator::~SelectionChangeInvalidator() {
// Offset the old selections if the document scrolled since we recorded them.
gfx::Vector2d offset = previous_origin_ - engine_->GetVisibleRect().origin();
for (auto& old_selection : old_selections_)
old_selection.Offset(offset);
std::vector<gfx::Rect> new_selections = GetVisibleSelections();
for (auto& new_selection : new_selections) {
for (auto& old_selection : old_selections_) {
if (!old_selection.IsEmpty() && new_selection == old_selection) {
// Rectangle was selected before and after, so no need to invalidate it.
// Mark the rectangles by setting them to empty.
new_selection = old_selection = gfx::Rect();
break;
}
}
}
bool selection_changed = false;
for (const auto& old_selection : old_selections_) {
if (!old_selection.IsEmpty()) {
Invalidate(old_selection);
selection_changed = true;
}
}
for (const auto& new_selection : new_selections) {
if (!new_selection.IsEmpty()) {
Invalidate(new_selection);
selection_changed = true;
}
}
if (selection_changed) {
engine_->OnSelectionTextChanged();
engine_->OnSelectionPositionChanged();
}
}
std::vector<gfx::Rect>
PDFiumEngine::SelectionChangeInvalidator::GetVisibleSelections() const {
std::vector<gfx::Rect> rects;
gfx::Point visible_point = engine_->GetVisibleRect().origin();
for (const auto& range : engine_->selection_) {
// Exclude selections on pages that's not currently visible.
if (!engine_->IsPageVisible(range.page_index()))
continue;
const std::vector<gfx::Rect>& selection_rects = range.GetScreenRects(
visible_point, engine_->current_zoom_,
engine_->layout_.options().default_page_orientation());
rects.insert(rects.end(), selection_rects.begin(), selection_rects.end());
}
return rects;
}
void PDFiumEngine::SelectionChangeInvalidator::Invalidate(
const gfx::Rect& selection) {
gfx::Rect expanded_selection = selection;
expanded_selection.Inset(-1, -1);
engine_->client_->Invalidate(expanded_selection);
}
PDFiumEngine::MouseDownState::MouseDownState(
const PDFiumPage::Area& area,
const PDFiumPage::LinkTarget& target)
: area_(area), target_(target) {}
PDFiumEngine::MouseDownState::~MouseDownState() = default;
void PDFiumEngine::MouseDownState::Set(const PDFiumPage::Area& area,
const PDFiumPage::LinkTarget& target) {
area_ = area;
target_ = target;
}
void PDFiumEngine::MouseDownState::Reset() {
area_ = PDFiumPage::NONSELECTABLE_AREA;
target_ = PDFiumPage::LinkTarget();
}
bool PDFiumEngine::MouseDownState::Matches(
const PDFiumPage::Area& area,
const PDFiumPage::LinkTarget& target) const {
if (area_ != area)
return false;
if (area == PDFiumPage::WEBLINK_AREA)
return target_.url == target.url;
if (area == PDFiumPage::DOCLINK_AREA)
return target_.page == target.page;
return true;
}
void PDFiumEngine::DeviceToPage(int page_index,
const gfx::Point& device_point,
double* page_x,
double* page_y) {
*page_x = 0;
*page_y = 0;
float device_x = device_point.x();
float device_y = device_point.y();
int temp_x = static_cast<int>((device_x + position_.x()) / current_zoom_ -
pages_[page_index]->rect().x());
int temp_y = static_cast<int>((device_y + position_.y()) / current_zoom_ -
pages_[page_index]->rect().y());
FPDF_BOOL ret = FPDF_DeviceToPage(
pages_[page_index]->GetPage(), 0, 0, pages_[page_index]->rect().width(),
pages_[page_index]->rect().height(),
ToPDFiumRotation(layout_.options().default_page_orientation()), temp_x,
temp_y, page_x, page_y);
DCHECK(ret);
}
int PDFiumEngine::GetVisiblePageIndex(FPDF_PAGE page) {
// Copy |visible_pages_| since it can change as a result of loading the page
// in GetPage(). See https://crbug.com/822091.
std::vector<int> visible_pages_copy(visible_pages_);
for (int page_index : visible_pages_copy) {
if (pages_[page_index]->GetPage() == page)
return page_index;
}
return -1;
}
void PDFiumEngine::SetCurrentPage(int index) {
in_flight_visible_page_.reset();
if (index == most_visible_page_ || !form())
return;
if (most_visible_page_ != -1 && called_do_document_action_) {
FPDF_PAGE old_page = pages_[most_visible_page_]->GetPage();
FORM_DoPageAAction(old_page, form(), FPDFPAGE_AACTION_CLOSE);
}
most_visible_page_ = index;
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
SetLastInstance(client_->GetPluginInstance());
#endif
if (most_visible_page_ != -1 && called_do_document_action_) {
FPDF_PAGE new_page = pages_[most_visible_page_]->GetPage();
FORM_DoPageAAction(new_page, form(), FPDFPAGE_AACTION_OPEN);
}
}
void PDFiumEngine::DrawPageShadow(const gfx::Rect& page_rc,
const gfx::Rect& shadow_rc,
const gfx::Rect& clip_rc,
SkBitmap& image_data) {
gfx::Rect page_rect(page_rc);
page_rect.Offset(page_offset_);
gfx::Rect shadow_rect(shadow_rc);
shadow_rect.Offset(page_offset_);
gfx::Rect clip_rect(clip_rc);
clip_rect.Offset(page_offset_);
// Page drop shadow parameters.
constexpr double factor = 0.5;
uint32_t depth = std::max({page_rect.x() - shadow_rect.x(),
page_rect.y() - shadow_rect.y(),
shadow_rect.right() - page_rect.right(),
shadow_rect.bottom() - page_rect.bottom()});
depth = static_cast<uint32_t>(depth * 1.5) + 1;
// We need to check depth only to verify our copy of shadow matrix is correct.
if (!page_shadow_ || page_shadow_->depth() != depth) {
page_shadow_ = std::make_unique<draw_utils::ShadowMatrix>(
depth, factor, client_->GetBackgroundColor());
}
DCHECK(!image_data.isNull());
DrawShadow(image_data, shadow_rect, page_rect, clip_rect, *page_shadow_);
}
void PDFiumEngine::GetRegion(const gfx::Point& location,
SkBitmap& image_data,
void*& region,
int& stride) const {
if (image_data.isNull()) {
DCHECK(plugin_size_.IsEmpty());
stride = 0;
region = nullptr;
return;
}
char* buffer = static_cast<char*>(image_data.getPixels());
stride = image_data.rowBytes();
gfx::Point offset_location = location + page_offset_;
// TODO: update this when we support BIDI and scrollbars can be on the left.
if (!buffer ||
!gfx::Rect(gfx::PointAtOffsetFromOrigin(page_offset_), plugin_size_)
.Contains(offset_location)) {
region = nullptr;
return;
}
buffer += location.y() * stride;
buffer += (location.x() + page_offset_.x()) * 4;
region = buffer;
}
void PDFiumEngine::OnSelectionTextChanged() {
DCHECK(!in_form_text_area_);
client_->SetSelectedText(GetSelectedText());
}
void PDFiumEngine::OnSelectionPositionChanged() {
// We need to determine the top-left and bottom-right points of the selection
// in order to report those to the embedder. This code assumes that the
// selection list is out of order.
gfx::Rect left(std::numeric_limits<int32_t>::max(),
std::numeric_limits<int32_t>::max(), 0, 0);
gfx::Rect right;
for (const auto& sel : selection_) {
const std::vector<gfx::Rect>& screen_rects =
sel.GetScreenRects(GetVisibleRect().origin(), current_zoom_,
layout_.options().default_page_orientation());
for (const auto& rect : screen_rects) {
if (IsAboveOrDirectlyLeftOf(rect, left))
left = rect;
if (IsAboveOrDirectlyLeftOf(right, rect))
right = rect;
}
}
right.set_x(right.x() + right.width());
if (left.IsEmpty()) {
left.set_x(0);
left.set_y(0);
}
client_->SelectionChanged(left, right);
}
gfx::Size PDFiumEngine::ApplyDocumentLayout(
const DocumentLayout::Options& options) {
// We need to return early if the layout would not change, otherwise calling
// client_->ScrollToPage() would send another "viewport" message, triggering
// an infinite loop.
//
// TODO(crbug.com/1013800): The current implementation computes layout twice
// (here, and in InvalidateAllPages()). This shouldn't be too expensive at
// realistic page counts, but could be avoided.
layout_.SetOptions(options);
UpdateDocumentLayout(&layout_);
if (!layout_.dirty())
return layout_.size();
// Store the current find index so that we can resume finding at that
// particular index after we have recomputed the find results.
std::string current_find_text = current_find_text_;
resume_find_index_ = current_find_index_;
// Save the current page.
int most_visible_page = most_visible_page_;
InvalidateAllPages();
// Restore find results.
if (!current_find_text.empty()) {
// Clear the UI.
client_->NotifyNumberOfFindResultsChanged(0, false);
StartFind(current_find_text, false);
}
// Restore current page. After a rotation, the page heights have changed but
// the scroll position has not. Re-adjust.
// TODO(thestig): It would be better to also restore the position on the page.
client_->ScrollToPage(most_visible_page);
return layout_.size();
}
void PDFiumEngine::SetSelecting(bool selecting) {
bool was_selecting = selecting_;
selecting_ = selecting;
if (selecting_ != was_selecting)
client_->IsSelectingChanged(selecting);
}
void PDFiumEngine::EnteredEditMode() {
if (edit_mode_)
return;
edit_mode_ = true;
client_->EnteredEditMode();
}
void PDFiumEngine::SetInFormTextArea(bool in_form_text_area) {
// If focus was previously in form text area, clear form text selection.
// Clearing needs to be done before changing focus to ensure the correct
// observer is notified of the change in selection. When |in_form_text_area_|
// is true, this is the Renderer. After it flips, the MimeHandler is notified.
if (in_form_text_area_) {
client_->SetSelectedText("");
}
client_->FormTextFieldFocusChange(in_form_text_area);
in_form_text_area_ = in_form_text_area;
// Clear |editable_form_text_area_| when focus no longer in form text area.
if (!in_form_text_area_)
editable_form_text_area_ = false;
}
void PDFiumEngine::SetMouseLeftButtonDown(bool is_mouse_left_button_down) {
mouse_left_button_down_ = is_mouse_left_button_down;
}
bool PDFiumEngine::IsAnnotationAnEditableFormTextArea(FPDF_ANNOTATION annot,
int form_type) const {
#if defined(PDF_ENABLE_XFA)
if (IS_XFA_FORMFIELD(form_type)) {
return form_type == FPDF_FORMFIELD_XFA_TEXTFIELD ||
form_type == FPDF_FORMFIELD_XFA_COMBOBOX;
}
#endif // defined(PDF_ENABLE_XFA)
if (!annot)
return false;
int flags = FPDFAnnot_GetFormFieldFlags(form(), annot);
return CheckIfEditableFormTextArea(flags, form_type);
}
void PDFiumEngine::ScheduleTouchTimer(const TouchInputEvent& evt) {
touch_timer_.Start(FROM_HERE, kTouchLongPressTimeout,
base::BindOnce(&PDFiumEngine::HandleLongPress,
base::Unretained(this), evt));
}
void PDFiumEngine::KillTouchTimer() {
touch_timer_.Stop();
}
bool PDFiumEngine::PageIndexInBounds(int index) const {
return index >= 0 && index < static_cast<int>(pages_.size());
}
bool PDFiumEngine::IsPageCharacterIndexInBounds(
const PP_PdfPageCharacterIndex& index) const {
return PageIndexInBounds(index.page_index) &&
pages_[index.page_index]->IsCharIndexInBounds(index.char_index);
}
float PDFiumEngine::GetToolbarHeightInScreenCoords() {
return client_->GetToolbarHeightInScreenCoords();
}
FPDF_BOOL PDFiumEngine::Pause_NeedToPauseNow(IFSDK_PAUSE* param) {
PDFiumEngine* engine = static_cast<PDFiumEngine*>(param);
return base::Time::Now() - engine->last_progressive_start_time_ >
engine->progressive_paint_timeout_;
}
void PDFiumEngine::SetSelection(
const PP_PdfPageCharacterIndex& selection_start_index,
const PP_PdfPageCharacterIndex& selection_end_index) {
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
PP_PdfPageCharacterIndex sel_start_index = selection_start_index;
PP_PdfPageCharacterIndex sel_end_index = selection_end_index;
if (sel_end_index.page_index < sel_start_index.page_index) {
std::swap(sel_end_index.page_index, sel_start_index.page_index);
std::swap(sel_end_index.char_index, sel_start_index.char_index);
}
if (sel_end_index.page_index == sel_start_index.page_index &&
sel_end_index.char_index < sel_start_index.char_index) {
std::swap(sel_end_index.char_index, sel_start_index.char_index);
}
for (uint32_t i = sel_start_index.page_index; i <= sel_end_index.page_index;
++i) {
int32_t char_count = pages_[i]->GetCharCount();
if (char_count <= 0)
continue;
int32_t start_char_index = 0;
int32_t end_char_index = char_count;
if (i == sel_start_index.page_index)
start_char_index = sel_start_index.char_index;
if (i == sel_end_index.page_index)
end_char_index = sel_end_index.char_index;
selection_.push_back(PDFiumRange(pages_[i].get(), start_char_index,
end_char_index - start_char_index));
}
}
void PDFiumEngine::ScrollFocusedAnnotationIntoView() {
FPDF_ANNOTATION annot;
int page_index;
if (!FORM_GetFocusedAnnot(form(), &page_index, &annot))
return;
ScrollAnnotationIntoView(annot, page_index);
FPDFPage_CloseAnnot(annot);
}
void PDFiumEngine::ScrollAnnotationIntoView(FPDF_ANNOTATION annot,
int page_index) {
if (!PageIndexInBounds(page_index))
return;
FS_RECTF annot_rect;
if (!FPDFAnnot_GetRect(annot, &annot_rect))
return;
gfx::Rect rect = pages_[page_index]->PageToScreen(
gfx::Point(), /*zoom=*/1.0, annot_rect.left, annot_rect.top,
annot_rect.right, annot_rect.bottom,
layout_.options().default_page_orientation());
gfx::Rect visible_rect = GetVisibleRect();
if (visible_rect.Contains(rect))
return;
// Since the focus rect is not already in the visible area, scrolling
// horizontally and/or vertically is required.
if (rect.y() < visible_rect.y() || rect.bottom() > visible_rect.bottom()) {
// Scroll the viewport vertically to align the top of focus rect to
// centre.
client_->ScrollToY(rect.y() * current_zoom_ - plugin_size_.height() / 2,
/*compensate_for_toolbar=*/false);
}
if (rect.x() < visible_rect.x() || rect.right() > visible_rect.right()) {
// Scroll the viewport horizontally to align the left of focus rect to
// centre.
client_->ScrollToX(rect.x() * current_zoom_ - plugin_size_.width() / 2);
}
}
void PDFiumEngine::OnFocusedAnnotationUpdated(FPDF_ANNOTATION annot,
int page_index) {
SetLinkUnderCursorForAnnotation(annot, page_index);
int form_type = FPDFAnnot_GetFormFieldType(form(), annot);
if (form_type <= FPDF_FORMFIELD_UNKNOWN) {
SetInFormTextArea(false);
return;
}
bool is_form_text_area =
PDFiumPage::FormTypeToArea(form_type) == PDFiumPage::FORM_TEXT_AREA;
if (is_form_text_area) {
SelectionChangeInvalidator selection_invalidator(this);
selection_.clear();
}
SetInFormTextArea(is_form_text_area);
editable_form_text_area_ =
is_form_text_area && IsAnnotationAnEditableFormTextArea(annot, form_type);
}
void PDFiumEngine::SetCaretPosition(const gfx::Point& position) {
// TODO(dsinclair): Handle caret position ...
}
void PDFiumEngine::MoveRangeSelectionExtent(const gfx::Point& extent) {
int page_index = -1;
int char_index = -1;
int form_type = FPDF_FORMFIELD_UNKNOWN;
PDFiumPage::LinkTarget target;
GetCharIndex(extent, &page_index, &char_index, &form_type, &target);
if (page_index < 0 || char_index < 0)
return;
SelectionChangeInvalidator selection_invalidator(this);
if (range_selection_direction_ == RangeSelectionDirection::Right) {
ExtendSelection(page_index, char_index);
return;
}
// For a left selection we clear the current selection and set a new starting
// point based on the new left position. We then extend that selection out to
// the previously provided base location.
selection_.clear();
selection_.push_back(PDFiumRange(pages_[page_index].get(), char_index, 0));
// This should always succeeed because the range selection base should have
// already been selected.
GetCharIndex(range_selection_base_, &page_index, &char_index, &form_type,
&target);
ExtendSelection(page_index, char_index);
}
void PDFiumEngine::SetSelectionBounds(const gfx::Point& base,
const gfx::Point& extent) {
range_selection_base_ = base;
range_selection_direction_ = IsAboveOrDirectlyLeftOf(base, extent)
? RangeSelectionDirection::Left
: RangeSelectionDirection::Right;
}
void PDFiumEngine::GetSelection(uint32_t* selection_start_page_index,
uint32_t* selection_start_char_index,
uint32_t* selection_end_page_index,
uint32_t* selection_end_char_index) {
size_t len = selection_.size();
if (len == 0) {
*selection_start_page_index = 0;
*selection_start_char_index = 0;
*selection_end_page_index = 0;
*selection_end_char_index = 0;
return;
}
*selection_start_page_index = selection_[0].page_index();
*selection_start_char_index = selection_[0].char_index();
*selection_end_page_index = selection_[len - 1].page_index();
// If the selection is all within one page, the end index is the
// start index plus the char count. But if the selection spans
// multiple pages, the selection starts at the beginning of the
// last page in |selection_| and goes to the char count.
if (len == 1) {
*selection_end_char_index =
selection_[0].char_index() + selection_[0].char_count();
} else {
*selection_end_char_index = selection_[len - 1].char_count();
}
}
void PDFiumEngine::LoadDocumentAttachmentInfoList() {
DCHECK(document_loaded_);
int attachment_count = FPDFDoc_GetAttachmentCount(doc());
if (attachment_count <= 0)
return;
doc_attachment_info_list_.resize(attachment_count);
for (int i = 0; i < attachment_count; ++i) {
FPDF_ATTACHMENT attachment = FPDFDoc_GetAttachment(doc(), i);
DCHECK(attachment);
doc_attachment_info_list_[i].name = GetAttachmentName(attachment);
doc_attachment_info_list_[i].creation_date =
GetAttachmentAttribute(attachment, "CreationDate");
doc_attachment_info_list_[i].modified_date =
GetAttachmentAttribute(attachment, "ModDate");
unsigned long actual_length_bytes;
doc_attachment_info_list_[i].is_readable =
FPDFAttachment_GetFile(attachment, /*buffer=*/nullptr,
/*buflen=*/0, &actual_length_bytes);
if (doc_attachment_info_list_[i].is_readable)
doc_attachment_info_list_[i].size_bytes = actual_length_bytes;
}
}
void PDFiumEngine::LoadDocumentMetadata() {
DCHECK(document_loaded_);
doc_metadata_.version = GetDocumentVersion();
doc_metadata_.linearized = IsLinearized();
// Document information dictionary entries
doc_metadata_.title = GetTrimmedMetadataByField("Title");
doc_metadata_.author = GetTrimmedMetadataByField("Author");
doc_metadata_.subject = GetTrimmedMetadataByField("Subject");
doc_metadata_.keywords = GetTrimmedMetadataByField("Keywords");
doc_metadata_.creator = GetTrimmedMetadataByField("Creator");
doc_metadata_.producer = GetTrimmedMetadataByField("Producer");
doc_metadata_.creation_date =
ParsePdfDate(GetTrimmedMetadataByField("CreationDate"));
doc_metadata_.mod_date = ParsePdfDate(GetTrimmedMetadataByField("ModDate"));
}
std::string PDFiumEngine::GetTrimmedMetadataByField(
FPDF_BYTESTRING field) const {
DCHECK(doc());
base::string16 metadata = CallPDFiumWideStringBufferApi(
base::BindRepeating(&FPDF_GetMetaText, doc(), field),
/*check_expected_size=*/false);
return base::UTF16ToUTF8(base::TrimWhitespace(metadata, base::TRIM_ALL));
}
PdfVersion PDFiumEngine::GetDocumentVersion() const {
DCHECK(doc());
int version;
if (!FPDF_GetFileVersion(doc(), &version))
return PdfVersion::kUnknown;
switch (version) {
case 10:
return PdfVersion::k1_0;
case 11:
return PdfVersion::k1_1;
case 12:
return PdfVersion::k1_2;
case 13:
return PdfVersion::k1_3;
case 14:
return PdfVersion::k1_4;
case 15:
return PdfVersion::k1_5;
case 16:
return PdfVersion::k1_6;
case 17:
return PdfVersion::k1_7;
case 18:
return PdfVersion::k1_8;
case 20:
return PdfVersion::k2_0;
default:
return PdfVersion::kUnknown;
}
}
bool PDFiumEngine::HandleTabEvent(uint32_t modifiers) {
bool alt_key = !!(modifiers & kInputEventModifierAltKey);
bool ctrl_key = !!(modifiers & kInputEventModifierControlKey);
if (alt_key || ctrl_key)
return HandleTabEventWithModifiers(modifiers);
return modifiers & kInputEventModifierShiftKey ? HandleTabBackward(modifiers)
: HandleTabForward(modifiers);
}
bool PDFiumEngine::HandleTabEventWithModifiers(uint32_t modifiers) {
// Only handle cases when a page is focused, else return false.
switch (focus_item_type_) {
case FocusElementType::kNone:
case FocusElementType::kDocument:
return false;
case FocusElementType::kPage:
if (last_focused_page_ == -1)
return false;
return !!FORM_OnKeyDown(form(), pages_[last_focused_page_]->GetPage(),
FWL_VKEY_Tab, modifiers);
default:
NOTREACHED();
return false;
}
}
bool PDFiumEngine::HandleTabForward(uint32_t modifiers) {
if (focus_item_type_ == FocusElementType::kNone) {
UpdateFocusItemType(FocusElementType::kDocument);
return true;
}
int page_index = last_focused_page_;
if (page_index == -1)
page_index = 0;
bool did_tab_forward = false;
while (!did_tab_forward && PageIndexInBounds(page_index)) {
did_tab_forward = !!FORM_OnKeyDown(form(), pages_[page_index]->GetPage(),
FWL_VKEY_Tab, modifiers);
if (!did_tab_forward)
++page_index;
}
if (did_tab_forward) {
last_focused_page_ = page_index;
UpdateFocusItemType(FocusElementType::kPage);
} else {
last_focused_page_ = -1;
UpdateFocusItemType(FocusElementType::kNone);
}
return did_tab_forward;
}
bool PDFiumEngine::HandleTabBackward(uint32_t modifiers) {
if (focus_item_type_ == FocusElementType::kDocument) {
UpdateFocusItemType(FocusElementType::kNone);
return false;
}
int page_index = last_focused_page_;
if (page_index == -1)
page_index = GetNumberOfPages() - 1;
bool did_tab_backward = false;
while (!did_tab_backward && PageIndexInBounds(page_index)) {
did_tab_backward = !!FORM_OnKeyDown(form(), pages_[page_index]->GetPage(),
FWL_VKEY_Tab, modifiers);
if (!did_tab_backward)
--page_index;
}
if (did_tab_backward) {
last_focused_page_ = page_index;
UpdateFocusItemType(FocusElementType::kPage);
} else {
// No focusable annotation found in pages. Possible scenarios:
// Case 1: |focus_item_type_| is None. Since no object in any page can take
// the focus, the document should take focus.
// Case 2: |focus_item_type_| is Page. Since there aren't any objects that
// could take focus, the document should take focus.
// Case 3: |focus_item_type_| is Document. Move focus_item_type_ to None.
switch (focus_item_type_) {
case FocusElementType::kPage:
case FocusElementType::kNone:
did_tab_backward = true;
last_focused_page_ = -1;
UpdateFocusItemType(FocusElementType::kDocument);
KillFormFocus();
break;
case FocusElementType::kDocument:
UpdateFocusItemType(FocusElementType::kNone);
break;
default:
NOTREACHED();
break;
}
}
return did_tab_backward;
}
void PDFiumEngine::UpdateFocusItemType(FocusElementType focus_item_type) {
if (focus_item_type_ == focus_item_type)
return;
if (focus_item_type_ == FocusElementType::kDocument)
client_->DocumentFocusChanged(false);
focus_item_type_ = focus_item_type;
if (focus_item_type_ == FocusElementType::kDocument)
client_->DocumentFocusChanged(true);
}
#if defined(PDF_ENABLE_XFA)
void PDFiumEngine::UpdatePageCount() {
InvalidateAllPages();
}
#endif // defined(PDF_ENABLE_XFA)
void PDFiumEngine::UpdateLinkUnderCursor(const std::string& target_url) {
if (link_under_cursor_ == target_url)
return;
link_under_cursor_ = target_url;
client_->SetLinkUnderCursor(link_under_cursor_);
}
void PDFiumEngine::SetLinkUnderCursorForAnnotation(FPDF_ANNOTATION annot,
int page_index) {
if (!PageIndexInBounds(page_index)) {
UpdateLinkUnderCursor("");
return;
}
PDFiumPage::LinkTarget target;
pages_[page_index]->GetLinkTarget(FPDFAnnot_GetLink(annot), &target);
UpdateLinkUnderCursor(target.url);
}
void PDFiumEngine::RequestThumbnail(int page_index,
float device_pixel_ratio,
SendThumbnailCallback send_callback) {
DCHECK(PageIndexInBounds(page_index));
pages_[page_index]->RequestThumbnail(device_pixel_ratio,
std::move(send_callback));
}
PDFiumEngine::ProgressivePaint::ProgressivePaint(int index,
const gfx::Rect& rect)
: page_index_(index), rect_(rect) {}
PDFiumEngine::ProgressivePaint::ProgressivePaint(ProgressivePaint&& that) =
default;
PDFiumEngine::ProgressivePaint::~ProgressivePaint() = default;
PDFiumEngine::ProgressivePaint& PDFiumEngine::ProgressivePaint::operator=(
ProgressivePaint&& that) = default;
void PDFiumEngine::ProgressivePaint::SetBitmapAndImageData(
ScopedFPDFBitmap bitmap,
SkBitmap image_data) {
bitmap_ = std::move(bitmap);
image_data_ = std::move(image_data);
}
} // namespace chrome_pdf