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chromium / ios-chromium-mirror / d4fcdecac6a8922a1daee99fb696ed0a43540b1d / . / pdf / pdf_view_plugin_base.cc
blob: e9bf047b21e45aa946a829cc5d6fcac9b04d58f7 [file] [log] [blame]
// Copyright 2020 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/pdf_view_plugin_base.h"
#include <algorithm>
#include <cmath>
#include <iterator>
#include <memory>
#include <sstream>
#include <string>
#include <utility>
#include "base/auto_reset.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/check.h"
#include "base/check_op.h"
#include "base/containers/contains.h"
#include "base/containers/fixed_flat_map.h"
#include "base/containers/flat_set.h"
#include "base/containers/span.h"
#include "base/cxx17_backports.h"
#include "base/feature_list.h"
#include "base/i18n/rtl.h"
#include "base/location.h"
#include "base/memory/weak_ptr.h"
#include "base/notreached.h"
#include "base/numerics/safe_conversions.h"
#include "base/strings/escape.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "base/values.h"
#include "pdf/accessibility.h"
#include "pdf/accessibility_structs.h"
#include "pdf/buildflags.h"
#include "pdf/content_restriction.h"
#include "pdf/document_layout.h"
#include "pdf/document_metadata.h"
#include "pdf/paint_ready_rect.h"
#include "pdf/pdf_engine.h"
#include "pdf/pdf_features.h"
#include "pdf/pdfium/pdfium_engine.h"
#include "pdf/pdfium/pdfium_form_filler.h"
#include "pdf/ppapi_migration/result_codes.h"
#include "pdf/ppapi_migration/url_loader.h"
#include "pdf/ui/file_name.h"
#include "pdf/ui/thumbnail.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#include "third_party/blink/public/common/input/web_input_event.h"
#include "third_party/blink/public/common/input/web_mouse_event.h"
#include "third_party/blink/public/common/input/web_touch_event.h"
#include "third_party/blink/public/web/web_print_preset_options.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkImage.h"
#include "third_party/skia/include/core/SkImageInfo.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "ui/events/blink/blink_event_util.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/point_conversions.h"
#include "ui/gfx/geometry/point_f.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/geometry/skia_conversions.h"
#include "ui/gfx/geometry/vector2d.h"
#include "ui/gfx/geometry/vector2d_f.h"
#include "url/gurl.h"
namespace chrome_pdf {
namespace {
// The minimum zoom level allowed.
constexpr double kMinZoom = 0.01;
// A delay to wait between each accessibility page to keep the system
// responsive.
constexpr base::TimeDelta kAccessibilityPageDelay = base::Milliseconds(100);
// Same value as printing::COMPLETE_PREVIEW_DOCUMENT_INDEX.
constexpr int kCompletePDFIndex = -1;
// A different negative value to differentiate itself from `kCompletePDFIndex`.
constexpr int kInvalidPDFIndex = -2;
// Enumeration of pinch states.
// This should match PinchPhase enum in chrome/browser/resources/pdf/viewport.js
enum class PinchPhase {
kNone = 0,
kStart = 1,
kUpdateZoomOut = 2,
kUpdateZoomIn = 3,
kEnd = 4,
};
// Prepares messages from the plugin that reply to messages from the embedder.
// If the "type" value of `message` is "foo", then the `reply_type` must be
// "fooReply". The `message` from the embedder must have a "messageId" value
// that will be copied to the reply message.
base::Value::Dict PrepareReplyMessage(base::StringPiece reply_type,
const base::Value::Dict& message) {
DCHECK_EQ(reply_type, *message.FindString("type") + "Reply");
base::Value::Dict reply;
reply.Set("type", reply_type);
reply.Set("messageId", *message.FindString("messageId"));
return reply;
}
bool IsPrintPreviewUrl(base::StringPiece url) {
return base::StartsWith(url, PdfViewPluginBase::kChromeUntrustedPrintHost);
}
int ExtractPrintPreviewPageIndex(base::StringPiece src_url) {
// Sample `src_url` format: chrome-untrusted://print/id/page_index/print.pdf
// The page_index is zero-based, but can be negative with special meanings.
std::vector<base::StringPiece> url_substr = base::SplitStringPiece(
src_url.substr(PdfViewPluginBase::kChromeUntrustedPrintHost.size()), "/",
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
if (url_substr.size() != 3)
return kInvalidPDFIndex;
if (url_substr[2] != "print.pdf")
return kInvalidPDFIndex;
int page_index = 0;
if (!base::StringToInt(url_substr[1], &page_index))
return kInvalidPDFIndex;
return page_index;
}
bool IsPreviewingPDF(int print_preview_page_count) {
return print_preview_page_count == 0;
}
} // namespace
// static
constexpr base::StringPiece PdfViewPluginBase::kChromePrintHost;
// static
constexpr base::StringPiece PdfViewPluginBase::kChromeUntrustedPrintHost;
PdfViewPluginBase::PdfViewPluginBase() = default;
PdfViewPluginBase::~PdfViewPluginBase() = default;
void PdfViewPluginBase::InitializeBase(std::unique_ptr<PDFiumEngine> engine,
base::StringPiece src_url,
base::StringPiece original_url,
bool full_frame) {
full_frame_ = full_frame;
DCHECK(engine);
engine_ = std::move(engine);
// If we're in print preview mode we don't need to load the document yet.
// A `kJSResetPrintPreviewModeType` message will be sent to the plugin letting
// it know the url to load. By not loading here we avoid loading the same
// document twice.
if (IsPrintPreview())
return;
last_progress_sent_ = 0;
LoadUrl(src_url, base::BindOnce(&PdfViewPluginBase::DidOpen, GetWeakPtr()));
url_ = std::string(original_url);
}
void PdfViewPluginBase::ProposeDocumentLayout(const DocumentLayout& layout) {
base::Value::Dict message;
message.Set("type", "documentDimensions");
message.Set("width", layout.size().width());
message.Set("height", layout.size().height());
message.Set("layoutOptions", layout.options().ToValue());
base::Value::List page_dimensions;
for (size_t i = 0; i < layout.page_count(); ++i)
page_dimensions.Append(base::Value(DictFromRect(layout.page_rect(i))));
message.Set("pageDimensions", std::move(page_dimensions));
SendMessage(std::move(message));
// Reload the accessibility tree on layout changes because the relative page
// bounds are no longer valid.
if (layout.dirty() && accessibility_state_ == AccessibilityState::kLoaded)
LoadAccessibility();
}
void PdfViewPluginBase::Invalidate(const gfx::Rect& rect) {
if (in_paint_) {
deferred_invalidates_.push_back(rect);
return;
}
gfx::Rect offset_rect = rect + available_area_.OffsetFromOrigin();
paint_manager_.InvalidateRect(offset_rect);
}
void PdfViewPluginBase::DidScroll(const gfx::Vector2d& offset) {
if (!image_data_.drawsNothing())
paint_manager_.ScrollRect(available_area_, offset);
}
void PdfViewPluginBase::ScrollToX(int x_screen_coords) {
const float x_scroll_pos = x_screen_coords / device_scale_;
base::Value::Dict message;
message.Set("type", "setScrollPosition");
message.Set("x", static_cast<double>(x_scroll_pos));
SendMessage(std::move(message));
}
void PdfViewPluginBase::ScrollToY(int y_screen_coords) {
const float y_scroll_pos = y_screen_coords / device_scale_;
base::Value::Dict message;
message.Set("type", "setScrollPosition");
message.Set("y", static_cast<double>(y_scroll_pos));
SendMessage(std::move(message));
}
void PdfViewPluginBase::ScrollBy(const gfx::Vector2d& delta) {
const float x_delta = delta.x() / device_scale_;
const float y_delta = delta.y() / device_scale_;
base::Value::Dict message;
message.Set("type", "scrollBy");
message.Set("x", static_cast<double>(x_delta));
message.Set("y", static_cast<double>(y_delta));
SendMessage(std::move(message));
}
void PdfViewPluginBase::ScrollToPage(int page) {
if (!engine_ || engine_->GetNumberOfPages() == 0)
return;
base::Value::Dict message;
message.Set("type", "goToPage");
message.Set("page", page);
SendMessage(std::move(message));
}
void PdfViewPluginBase::NavigateTo(const std::string& url,
WindowOpenDisposition disposition) {
base::Value::Dict message;
message.Set("type", "navigate");
message.Set("url", url);
message.Set("disposition", static_cast<int>(disposition));
SendMessage(std::move(message));
}
void PdfViewPluginBase::NavigateToDestination(int page,
const float* x,
const float* y,
const float* zoom) {
base::Value::Dict message;
message.Set("type", "navigateToDestination");
message.Set("page", page);
if (x)
message.Set("x", static_cast<double>(*x));
if (y)
message.Set("y", static_cast<double>(*y));
if (zoom)
message.Set("zoom", static_cast<double>(*zoom));
SendMessage(std::move(message));
}
void PdfViewPluginBase::NotifyTouchSelectionOccurred() {
base::Value::Dict message;
message.Set("type", "touchSelectionOccurred");
SendMessage(std::move(message));
}
void PdfViewPluginBase::GetDocumentPassword(
base::OnceCallback<void(const std::string&)> callback) {
DCHECK(password_callback_.is_null());
password_callback_ = std::move(callback);
base::Value::Dict message;
message.Set("type", "getPassword");
SendMessage(std::move(message));
}
void PdfViewPluginBase::Beep() {
base::Value::Dict message;
message.Set("type", "beep");
SendMessage(std::move(message));
}
std::string PdfViewPluginBase::GetURL() {
return url_;
}
void PdfViewPluginBase::Email(const std::string& to,
const std::string& cc,
const std::string& bcc,
const std::string& subject,
const std::string& body) {
base::Value::Dict message;
message.Set("type", "email");
message.Set("to", base::EscapeUrlEncodedData(to, false));
message.Set("cc", base::EscapeUrlEncodedData(cc, false));
message.Set("bcc", base::EscapeUrlEncodedData(bcc, false));
message.Set("subject", base::EscapeUrlEncodedData(subject, false));
message.Set("body", base::EscapeUrlEncodedData(body, false));
SendMessage(std::move(message));
}
void PdfViewPluginBase::Print() {
if (!engine_)
return;
const bool can_print =
engine_->HasPermission(DocumentPermission::kPrintLowQuality) ||
engine_->HasPermission(DocumentPermission::kPrintHighQuality);
if (!can_print)
return;
InvokePrintDialog();
}
void PdfViewPluginBase::DocumentLoadComplete() {
DCHECK_EQ(DocumentLoadState::kLoading, document_load_state_);
document_load_state_ = DocumentLoadState::kComplete;
UserMetricsRecordAction("PDF.LoadSuccess");
// Clear the focus state for on-screen keyboards.
FormFieldFocusChange(PDFEngine::FocusFieldType::kNoFocus);
if (IsPrintPreview())
OnPrintPreviewLoaded();
OnDocumentLoadComplete();
if (accessibility_state_ == AccessibilityState::kPending)
LoadAccessibility();
if (!full_frame_)
return;
DidStopLoading();
SetContentRestrictions(GetContentRestrictions());
}
void PdfViewPluginBase::DocumentLoadFailed() {
DCHECK_EQ(DocumentLoadState::kLoading, document_load_state_);
document_load_state_ = DocumentLoadState::kFailed;
UserMetricsRecordAction("PDF.LoadFailure");
// Send a progress value of -1 to indicate a failure.
SendLoadingProgress(-1);
DidStopLoading();
paint_manager_.InvalidateRect(gfx::Rect(plugin_rect_.size()));
}
void PdfViewPluginBase::DocumentHasUnsupportedFeature(
const std::string& feature) {
DCHECK(!feature.empty());
const std::string metric = "PDF_Unsupported_" + feature;
bool inserted = unsupported_features_reported_.insert(metric).second;
if (inserted)
UserMetricsRecordAction(metric);
if (!full_frame() || notified_browser_about_unsupported_feature_)
return;
NotifyUnsupportedFeature();
notified_browser_about_unsupported_feature_ = true;
}
void PdfViewPluginBase::DocumentLoadProgress(uint32_t available,
uint32_t doc_size) {
double progress = 0.0;
if (doc_size > 0) {
progress = 100.0 * static_cast<double>(available) / doc_size;
} else {
// Use heuristics when the document size is unknown.
// Progress logarithmically from 0 to 100M.
static const double kFactor = std::log(100'000'000.0) / 100.0;
if (available > 0)
progress =
std::min(std::log(static_cast<double>(available)) / kFactor, 100.0);
}
// DocumentLoadComplete() will send the 100% load progress.
if (progress >= 100)
return;
// Avoid sending too many progress messages over PostMessage.
if (progress <= last_progress_sent_ + 1)
return;
SendLoadingProgress(progress);
}
void PdfViewPluginBase::FormFieldFocusChange(PDFEngine::FocusFieldType type) {
base::Value::Dict message;
message.Set("type", "formFocusChange");
message.Set("focused", type != PDFEngine::FocusFieldType::kNoFocus);
SendMessage(std::move(message));
SetFormTextFieldInFocus(type == PDFEngine::FocusFieldType::kText);
}
void PdfViewPluginBase::SetIsSelecting(bool is_selecting) {
base::Value::Dict message;
message.Set("type", "setIsSelecting");
message.Set("isSelecting", is_selecting);
SendMessage(std::move(message));
}
void PdfViewPluginBase::SelectionChanged(const gfx::Rect& left,
const gfx::Rect& right) {
const gfx::Rect left_with_offset = left + plugin_offset_in_frame();
const gfx::Rect right_with_offset = right + plugin_offset_in_frame();
gfx::PointF left_point(left_with_offset.x() + available_area_.x(),
left_with_offset.y());
gfx::PointF right_point(right_with_offset.x() + available_area_.x(),
right_with_offset.y());
const float inverse_scale = 1.0f / device_scale_;
left_point.Scale(inverse_scale);
right_point.Scale(inverse_scale);
NotifySelectionChanged(left_point, left_with_offset.height() * inverse_scale,
right_point,
right_with_offset.height() * inverse_scale);
if (accessibility_state_ == AccessibilityState::kLoaded)
PrepareAndSetAccessibilityViewportInfo();
}
void PdfViewPluginBase::DocumentFocusChanged(bool document_has_focus) {
base::Value::Dict message;
message.Set("type", "documentFocusChanged");
message.Set("hasFocus", document_has_focus);
SendMessage(std::move(message));
}
void PdfViewPluginBase::SetLinkUnderCursor(
const std::string& link_under_cursor) {
link_under_cursor_ = link_under_cursor;
}
bool PdfViewPluginBase::HandleInputEvent(const blink::WebInputEvent& event) {
// Ignore user input in read-only mode.
if (engine()->IsReadOnly())
return false;
// `engine()` expects input events in device coordinates.
std::unique_ptr<blink::WebInputEvent> transformed_event =
ui::TranslateAndScaleWebInputEvent(
event, gfx::Vector2dF(-available_area_.x() / device_scale_, 0),
device_scale_);
const blink::WebInputEvent& event_to_handle =
transformed_event ? *transformed_event : event;
if (engine()->HandleInputEvent(event_to_handle))
return true;
// Middle click is used for scrolling and is handled by the container page.
if (blink::WebInputEvent::IsMouseEventType(event_to_handle.GetType()) &&
static_cast<const blink::WebMouseEvent&>(event_to_handle).button ==
blink::WebPointerProperties::Button::kMiddle) {
return false;
}
// Return true for unhandled clicks so the plugin takes focus.
return event_to_handle.GetType() == blink::WebInputEvent::Type::kMouseDown;
}
void PdfViewPluginBase::HandleMessage(const base::Value::Dict& message) {
using MessageHandler = void (PdfViewPluginBase::*)(const base::Value::Dict&);
static constexpr auto kMessageHandlers =
base::MakeFixedFlatMap<base::StringPiece, MessageHandler>({
{"displayAnnotations",
&PdfViewPluginBase::HandleDisplayAnnotationsMessage},
{"getNamedDestination",
&PdfViewPluginBase::HandleGetNamedDestinationMessage},
{"getPasswordComplete",
&PdfViewPluginBase::HandleGetPasswordCompleteMessage},
{"getSelectedText", &PdfViewPluginBase::HandleGetSelectedTextMessage},
{"getThumbnail", &PdfViewPluginBase::HandleGetThumbnailMessage},
{"print", &PdfViewPluginBase::HandlePrintMessage},
{"loadPreviewPage", &PdfViewPluginBase::HandleLoadPreviewPageMessage},
{"resetPrintPreviewMode",
&PdfViewPluginBase::HandleResetPrintPreviewModeMessage},
{"rotateClockwise", &PdfViewPluginBase::HandleRotateClockwiseMessage},
{"rotateCounterclockwise",
&PdfViewPluginBase::HandleRotateCounterclockwiseMessage},
{"saveAttachment", &PdfViewPluginBase::HandleSaveAttachmentMessage},
{"selectAll", &PdfViewPluginBase::HandleSelectAllMessage},
{"setPresentationMode",
&PdfViewPluginBase::HandleSetPresentationModeMessage},
{"setTwoUpView", &PdfViewPluginBase::HandleSetTwoUpViewMessage},
{"stopScrolling", &PdfViewPluginBase::HandleStopScrollingMessage},
{"viewport", &PdfViewPluginBase::HandleViewportMessage},
});
MessageHandler handler = kMessageHandlers.at(*message.FindString("type"));
(this->*handler)(message);
}
void PdfViewPluginBase::SendLoadingProgress(double percentage) {
DCHECK(percentage == -1 || (percentage >= 0 && percentage <= 100));
last_progress_sent_ = percentage;
base::Value::Dict message;
message.Set("type", "loadProgress");
message.Set("progress", percentage);
SendMessage(std::move(message));
}
void PdfViewPluginBase::SendPrintPreviewLoadedNotification() {
base::Value::Dict message;
message.Set("type", "printPreviewLoaded");
SendMessage(std::move(message));
}
void PdfViewPluginBase::OnPaint(const std::vector<gfx::Rect>& paint_rects,
std::vector<PaintReadyRect>& ready,
std::vector<gfx::Rect>& pending) {
base::AutoReset<bool> auto_reset_in_paint(&in_paint_, true);
DoPaint(paint_rects, ready, pending);
}
void PdfViewPluginBase::PreviewDocumentLoadComplete() {
if (preview_document_load_state_ != DocumentLoadState::kLoading ||
preview_pages_info_.empty()) {
return;
}
preview_document_load_state_ = DocumentLoadState::kComplete;
int dest_page_index = preview_pages_info_.front().second;
DCHECK_GT(dest_page_index, 0);
preview_pages_info_.pop();
DCHECK(preview_engine_);
engine()->AppendPage(preview_engine_.get(), dest_page_index);
++print_preview_loaded_page_count_;
LoadNextPreviewPage();
}
void PdfViewPluginBase::PreviewDocumentLoadFailed() {
UserMetricsRecordAction("PDF.PreviewDocumentLoadFailure");
if (preview_document_load_state_ != DocumentLoadState::kLoading ||
preview_pages_info_.empty()) {
return;
}
// Even if a print preview page failed to load, keep going.
preview_document_load_state_ = DocumentLoadState::kFailed;
preview_pages_info_.pop();
++print_preview_loaded_page_count_;
LoadNextPreviewPage();
}
void PdfViewPluginBase::EnableAccessibility() {
if (accessibility_state_ == AccessibilityState::kLoaded)
return;
if (accessibility_state_ == AccessibilityState::kOff)
accessibility_state_ = AccessibilityState::kPending;
if (document_load_state_ == DocumentLoadState::kComplete)
LoadAccessibility();
}
void PdfViewPluginBase::HandleAccessibilityAction(
const AccessibilityActionData& action_data) {
engine_->HandleAccessibilityAction(action_data);
}
int PdfViewPluginBase::GetContentRestrictions() const {
int content_restrictions = kContentRestrictionCut | kContentRestrictionPaste;
if (!engine()->HasPermission(DocumentPermission::kCopy))
content_restrictions |= kContentRestrictionCopy;
if (!engine()->HasPermission(DocumentPermission::kPrintLowQuality) &&
!engine()->HasPermission(DocumentPermission::kPrintHighQuality)) {
content_restrictions |= kContentRestrictionPrint;
}
return content_restrictions;
}
AccessibilityDocInfo PdfViewPluginBase::GetAccessibilityDocInfo() const {
AccessibilityDocInfo doc_info;
doc_info.page_count = engine()->GetNumberOfPages();
doc_info.text_accessible =
engine()->HasPermission(DocumentPermission::kCopyAccessible);
doc_info.text_copyable = engine()->HasPermission(DocumentPermission::kCopy);
return doc_info;
}
bool PdfViewPluginBase::UnsupportedFeatureIsReportedForTesting(
const std::string& feature) const {
return base::Contains(unsupported_features_reported_, feature);
}
void PdfViewPluginBase::InitializeEngineForTesting(
std::unique_ptr<PDFiumEngine> engine) {
DCHECK(engine);
engine_ = std::move(engine);
}
void PdfViewPluginBase::DestroyEngine() {
engine_.reset();
}
void PdfViewPluginBase::DestroyPreviewEngine() {
preview_engine_.reset();
}
void PdfViewPluginBase::InvalidateAfterPaintDone() {
if (deferred_invalidates_.empty())
return;
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(&PdfViewPluginBase::ClearDeferredInvalidates,
GetWeakPtr()));
}
void PdfViewPluginBase::OnGeometryChanged(double old_zoom,
float old_device_scale) {
RecalculateAreas(old_zoom, old_device_scale);
if (accessibility_state_ == AccessibilityState::kLoaded)
PrepareAndSetAccessibilityViewportInfo();
}
blink::WebPrintPresetOptions PdfViewPluginBase::GetPrintPresetOptions() {
blink::WebPrintPresetOptions options;
options.is_scaling_disabled = !engine_->GetPrintScaling();
options.copies = engine_->GetCopiesToPrint();
options.duplex_mode = engine_->GetDuplexMode();
options.uniform_page_size = engine_->GetUniformPageSizePoints();
return options;
}
int PdfViewPluginBase::PrintBegin(const blink::WebPrintParams& print_params) {
// The returned value is always equal to the number of pages in the PDF
// document irrespective of the printable area.
int32_t ret = engine()->GetNumberOfPages();
if (!ret)
return 0;
if (!engine()->HasPermission(DocumentPermission::kPrintLowQuality))
return 0;
print_params_ = print_params;
if (!engine()->HasPermission(DocumentPermission::kPrintHighQuality))
print_params_->rasterize_pdf = true;
engine()->PrintBegin();
return ret;
}
std::vector<uint8_t> PdfViewPluginBase::PrintPages(
const std::vector<int>& page_numbers) {
print_pages_called_ = true;
return engine()->PrintPages(page_numbers, print_params_.value());
}
void PdfViewPluginBase::PrintEnd() {
if (print_pages_called_)
UserMetricsRecordAction("PDF.PrintPage");
print_pages_called_ = false;
print_params_.reset();
engine_->PrintEnd();
}
void PdfViewPluginBase::UpdateGeometryOnPluginRectChanged(
const gfx::Rect& new_plugin_rect,
float new_device_scale) {
DCHECK_GT(new_device_scale, 0.0f);
if (new_device_scale == device_scale_ && new_plugin_rect == plugin_rect_)
return;
const float old_device_scale = device_scale_;
device_scale_ = new_device_scale;
plugin_rect_ = new_plugin_rect;
// TODO(crbug.com/1250173): For the Pepper-free plugin, `plugin_dip_size_` is
// calculated from the `window_rect` in PdfViewWebPlugin::UpdateGeometry().
// We should try to avoid the downscaling during this calculation process and
// maybe migrate off `plugin_dip_size_`.
plugin_dip_size_ =
gfx::ScaleToEnclosingRect(new_plugin_rect, 1.0f / new_device_scale)
.size();
paint_manager_.SetSize(plugin_rect_.size(), device_scale_);
// Initialize the image data buffer if the context size changes.
const gfx::Size old_image_size = gfx::SkISizeToSize(image_data_.dimensions());
const gfx::Size new_image_size =
PaintManager::GetNewContextSize(old_image_size, plugin_rect_.size());
if (new_image_size != old_image_size) {
image_data_.allocPixels(
SkImageInfo::MakeN32Premul(gfx::SizeToSkISize(new_image_size)));
first_paint_ = true;
}
// Skip updating the geometry if the new image data buffer is empty.
if (image_data_.drawsNothing())
return;
OnGeometryChanged(zoom_, old_device_scale);
}
void PdfViewPluginBase::RecalculateAreas(double old_zoom,
float old_device_scale) {
if (zoom_ != old_zoom || device_scale_ != old_device_scale)
engine()->ZoomUpdated(zoom_ * device_scale_);
available_area_ = gfx::Rect(plugin_rect_.size());
int doc_width = GetDocumentPixelWidth();
if (doc_width < available_area_.width()) {
// Center the document horizontally inside the plugin rectangle.
available_area_.Offset((plugin_rect_.width() - doc_width) / 2, 0);
available_area_.set_width(doc_width);
}
// The distance between top of the plugin and the bottom of the document in
// pixels.
int bottom_of_document = GetDocumentPixelHeight();
if (bottom_of_document < plugin_rect_.height())
available_area_.set_height(bottom_of_document);
CalculateBackgroundParts();
engine()->PageOffsetUpdated(available_area_.OffsetFromOrigin());
engine()->PluginSizeUpdated(available_area_.size());
}
void PdfViewPluginBase::CalculateBackgroundParts() {
background_parts_.clear();
int left_width = available_area_.x();
int right_start = available_area_.right();
int right_width = std::abs(plugin_rect_.width() - available_area_.right());
int bottom = std::min(available_area_.bottom(), plugin_rect_.height());
// Note: we assume the display of the PDF document is always centered
// horizontally, but not necessarily centered vertically.
// Add the left rectangle.
BackgroundPart part = {gfx::Rect(left_width, bottom), GetBackgroundColor()};
if (!part.location.IsEmpty())
background_parts_.push_back(part);
// Add the right rectangle.
part.location = gfx::Rect(right_start, 0, right_width, bottom);
if (!part.location.IsEmpty())
background_parts_.push_back(part);
// Add the bottom rectangle.
part.location = gfx::Rect(0, bottom, plugin_rect_.width(),
plugin_rect_.height() - bottom);
if (!part.location.IsEmpty())
background_parts_.push_back(part);
}
gfx::PointF PdfViewPluginBase::GetScrollPositionFromOffset(
const gfx::Vector2dF& scroll_offset) const {
gfx::PointF scroll_origin;
// TODO(crbug.com/1140374): Right-to-left scrolling currently is not
// compatible with the PDF viewer's sticky "scroller" element.
if (ui_direction_ == base::i18n::RIGHT_TO_LEFT && IsPrintPreview()) {
scroll_origin.set_x(
std::max(document_size_.width() * static_cast<float>(zoom_) -
plugin_dip_size_.width(),
0.0f));
}
return scroll_origin + scroll_offset;
}
void PdfViewPluginBase::UpdateScroll(const gfx::PointF& scroll_position) {
if (stop_scrolling_)
return;
float max_x = std::max(document_size_.width() * static_cast<float>(zoom_) -
plugin_dip_size_.width(),
0.0f);
float max_y = std::max(document_size_.height() * static_cast<float>(zoom_) -
plugin_dip_size_.height(),
0.0f);
gfx::PointF scaled_scroll_position(
base::clamp(scroll_position.x(), 0.0f, max_x),
base::clamp(scroll_position.y(), 0.0f, max_y));
scaled_scroll_position.Scale(device_scale_);
engine()->ScrolledToXPosition(scaled_scroll_position.x());
engine()->ScrolledToYPosition(scaled_scroll_position.y());
}
int PdfViewPluginBase::GetDocumentPixelWidth() const {
return static_cast<int>(
std::ceil(document_size_.width() * zoom() * device_scale()));
}
int PdfViewPluginBase::GetDocumentPixelHeight() const {
return static_cast<int>(
std::ceil(document_size_.height() * zoom() * device_scale()));
}
void PdfViewPluginBase::SetCaretPosition(const gfx::PointF& position) {
engine()->SetCaretPosition(FrameToPdfCoordinates(position));
}
void PdfViewPluginBase::MoveRangeSelectionExtent(const gfx::PointF& extent) {
engine()->MoveRangeSelectionExtent(FrameToPdfCoordinates(extent));
}
void PdfViewPluginBase::SetSelectionBounds(const gfx::PointF& base,
const gfx::PointF& extent) {
engine()->SetSelectionBounds(FrameToPdfCoordinates(base),
FrameToPdfCoordinates(extent));
}
void PdfViewPluginBase::PrepareAndSetAccessibilityPageInfo(int32_t page_index) {
// Outdated calls are ignored.
if (page_index != next_accessibility_page_index_)
return;
++next_accessibility_page_index_;
AccessibilityPageInfo page_info;
std::vector<AccessibilityTextRunInfo> text_runs;
std::vector<AccessibilityCharInfo> chars;
AccessibilityPageObjects page_objects;
if (!GetAccessibilityInfo(engine(), page_index, page_info, text_runs, chars,
page_objects)) {
return;
}
SetAccessibilityPageInfo(std::move(page_info), std::move(text_runs),
std::move(chars), std::move(page_objects));
// Schedule loading the next page.
base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
FROM_HERE,
base::BindOnce(&PdfViewPluginBase::PrepareAndSetAccessibilityPageInfo,
GetWeakPtr(), page_index + 1),
kAccessibilityPageDelay);
}
void PdfViewPluginBase::PrepareAndSetAccessibilityViewportInfo() {
AccessibilityViewportInfo viewport_info;
viewport_info.scroll = gfx::ScaleToFlooredPoint(
gfx::PointAtOffsetFromOrigin(plugin_offset_in_frame()),
-1 / device_scale_);
viewport_info.offset = gfx::ScaleToFlooredPoint(available_area_.origin(),
1 / (device_scale_ * zoom_));
viewport_info.zoom = zoom_;
viewport_info.scale = device_scale_;
viewport_info.focus_info = {FocusObjectType::kNone, 0, 0};
engine_->GetSelection(&viewport_info.selection_start_page_index,
&viewport_info.selection_start_char_index,
&viewport_info.selection_end_page_index,
&viewport_info.selection_end_char_index);
SetAccessibilityViewportInfo(std::move(viewport_info));
}
gfx::Vector2d PdfViewPluginBase::plugin_offset_in_frame() const {
return plugin_rect_.OffsetFromOrigin();
}
void PdfViewPluginBase::SetZoom(double scale) {
double old_zoom = zoom_;
zoom_ = scale;
OnGeometryChanged(old_zoom, device_scale_);
if (!document_size_.IsEmpty())
paint_manager_.InvalidateRect(gfx::Rect(plugin_rect_.size()));
}
// static
base::Value::DictStorage PdfViewPluginBase::DictFromRect(
const gfx::Rect& rect) {
base::Value::DictStorage dict;
dict["x"] = base::Value(rect.x());
dict["y"] = base::Value(rect.y());
dict["width"] = base::Value(rect.width());
dict["height"] = base::Value(rect.height());
return dict;
}
void PdfViewPluginBase::HandleDisplayAnnotationsMessage(
const base::Value::Dict& message) {
engine()->DisplayAnnotations(message.FindBool("display").value());
}
void PdfViewPluginBase::HandleGetNamedDestinationMessage(
const base::Value::Dict& message) {
absl::optional<PDFEngine::NamedDestination> named_destination =
engine()->GetNamedDestination(*message.FindString("namedDestination"));
const int page_number = named_destination.has_value()
? base::checked_cast<int>(named_destination->page)
: -1;
base::Value::Dict reply =
PrepareReplyMessage("getNamedDestinationReply", message);
reply.Set("pageNumber", page_number);
if (named_destination.has_value() && !named_destination->view.empty()) {
std::ostringstream view_stream;
view_stream << named_destination->view;
if (named_destination->xyz_params.empty()) {
for (unsigned long i = 0; i < named_destination->num_params; ++i)
view_stream << "," << named_destination->params[i];
} else {
view_stream << "," << named_destination->xyz_params;
}
reply.Set("namedDestinationView", view_stream.str());
}
SendMessage(std::move(reply));
}
void PdfViewPluginBase::HandleGetPasswordCompleteMessage(
const base::Value::Dict& message) {
DCHECK(password_callback_);
std::move(password_callback_).Run(*message.FindString("password"));
}
void PdfViewPluginBase::HandleGetSelectedTextMessage(
const base::Value::Dict& message) {
// Always return unix newlines to JavaScript.
std::string selected_text;
base::RemoveChars(engine()->GetSelectedText(), "\r", &selected_text);
base::Value::Dict reply =
PrepareReplyMessage("getSelectedTextReply", message);
reply.Set("selectedText", selected_text);
SendMessage(std::move(reply));
}
void PdfViewPluginBase::HandleGetThumbnailMessage(
const base::Value::Dict& message) {
const int page_index = message.FindInt("page").value();
base::Value::Dict reply = PrepareReplyMessage("getThumbnailReply", message);
engine()->RequestThumbnail(page_index, device_scale_,
base::BindOnce(&PdfViewPluginBase::SendThumbnail,
GetWeakPtr(), std::move(reply)));
}
void PdfViewPluginBase::HandleLoadPreviewPageMessage(
const base::Value::Dict& message) {
const std::string& url = *message.FindString("url");
int index = message.FindInt("index").value();
// For security reasons, crash if `url` is not for Print Preview.
CHECK(IsPrintPreview());
CHECK(IsPrintPreviewUrl(url));
ProcessPreviewPageInfo(url, index);
}
void PdfViewPluginBase::HandlePrintMessage(
const base::Value::Dict& /*message*/) {
Print();
}
void PdfViewPluginBase::HandleResetPrintPreviewModeMessage(
const base::Value::Dict& message) {
const std::string& url = *message.FindString("url");
bool is_grayscale = message.FindBool("grayscale").value();
int print_preview_page_count = message.FindInt("pageCount").value();
// For security reasons, crash if `url` is not for Print Preview.
CHECK(IsPrintPreview());
CHECK(IsPrintPreviewUrl(url));
DCHECK_GE(print_preview_page_count, 0);
// The page count is zero if the print preview source is a PDF. In which
// case, the page index for `url` should be at `kCompletePDFIndex`.
// When the page count is not zero, then the source is not PDF. In which
// case, the page index for `url` should be non-negative.
bool is_previewing_pdf = IsPreviewingPDF(print_preview_page_count);
int page_index = ExtractPrintPreviewPageIndex(url);
if (is_previewing_pdf)
DCHECK_EQ(page_index, kCompletePDFIndex);
else
DCHECK_GE(page_index, 0);
print_preview_page_count_ = print_preview_page_count;
print_preview_loaded_page_count_ = 0;
url_ = url;
preview_pages_info_ = base::queue<PreviewPageInfo>();
preview_document_load_state_ = DocumentLoadState::kComplete;
document_load_state_ = DocumentLoadState::kLoading;
last_progress_sent_ = 0;
LoadUrl(GetURL(), base::BindOnce(&PdfViewPluginBase::DidOpen, GetWeakPtr()));
preview_engine_.reset();
// TODO(crbug.com/1237952): Figure out a more consistent way to preserve
// engine settings across a Print Preview reset.
engine_ = CreateEngine(this, PDFiumFormFiller::ScriptOption::kNoJavaScript);
engine()->ZoomUpdated(zoom_ * device_scale_);
engine()->PageOffsetUpdated(available_area_.OffsetFromOrigin());
engine()->PluginSizeUpdated(available_area_.size());
engine()->SetGrayscale(is_grayscale);
paint_manager_.InvalidateRect(gfx::Rect(plugin_rect().size()));
}
void PdfViewPluginBase::HandleRotateClockwiseMessage(
const base::Value::Dict& /*message*/) {
engine()->RotateClockwise();
}
void PdfViewPluginBase::HandleRotateCounterclockwiseMessage(
const base::Value::Dict& /*message*/) {
engine()->RotateCounterclockwise();
}
void PdfViewPluginBase::HandleSaveAttachmentMessage(
const base::Value::Dict& message) {
const int index = message.FindInt("attachmentIndex").value();
const std::vector<DocumentAttachmentInfo>& list =
engine()->GetDocumentAttachmentInfoList();
DCHECK_GE(index, 0);
DCHECK_LT(static_cast<size_t>(index), list.size());
DCHECK(list[index].is_readable);
DCHECK(IsSaveDataSizeValid(list[index].size_bytes));
std::vector<uint8_t> data = engine()->GetAttachmentData(index);
base::Value data_to_save(
IsSaveDataSizeValid(data.size()) ? data : std::vector<uint8_t>());
base::Value::Dict reply = PrepareReplyMessage("saveAttachmentReply", message);
reply.Set("dataToSave", std::move(data_to_save));
SendMessage(std::move(reply));
}
void PdfViewPluginBase::HandleSelectAllMessage(
const base::Value::Dict& /*message*/) {
engine()->SelectAll();
}
void PdfViewPluginBase::HandleSetPresentationModeMessage(
const base::Value::Dict& message) {
engine()->SetReadOnly(message.FindBool("enablePresentationMode").value());
}
void PdfViewPluginBase::HandleSetTwoUpViewMessage(
const base::Value::Dict& message) {
engine()->SetTwoUpView(message.FindBool("enableTwoUpView").value());
}
void PdfViewPluginBase::HandleStopScrollingMessage(
const base::Value::Dict& /*message*/) {
stop_scrolling_ = true;
}
void PdfViewPluginBase::HandleViewportMessage(
const base::Value::Dict& message) {
const base::Value::Dict* layout_options_value =
message.FindDict("layoutOptions");
if (layout_options_value) {
DocumentLayout::Options layout_options;
layout_options.FromValue(*layout_options_value);
ui_direction_ = layout_options.direction();
// TODO(crbug.com/1013800): Eliminate need to get document size from here.
document_size_ = engine()->ApplyDocumentLayout(layout_options);
OnGeometryChanged(zoom_, device_scale_);
if (!document_size_.IsEmpty())
paint_manager_.InvalidateRect(gfx::Rect(plugin_rect_.size()));
// Send 100% loading progress only after initial layout negotiated.
if (last_progress_sent_ < 100 &&
document_load_state_ == DocumentLoadState::kComplete) {
SendLoadingProgress(/*percentage=*/100);
}
}
gfx::Vector2dF scroll_offset(*message.FindDouble("xOffset"),
*message.FindDouble("yOffset"));
double new_zoom = *message.FindDouble("zoom");
const PinchPhase pinch_phase =
static_cast<PinchPhase>(*message.FindInt("pinchPhase"));
received_viewport_message_ = true;
stop_scrolling_ = false;
const double zoom_ratio = new_zoom / zoom_;
if (pinch_phase == PinchPhase::kStart) {
scroll_offset_at_last_raster_ = scroll_offset;
last_bitmap_smaller_ = false;
needs_reraster_ = false;
return;
}
// When zooming in, we set a layer transform to avoid unneeded rerasters.
// Also, if we're zooming out and the last time we rerastered was when
// we were even further zoomed out (i.e. we pinch zoomed in and are now
// pinch zooming back out in the same gesture), we update the layer
// transform instead of rerastering.
if (pinch_phase == PinchPhase::kUpdateZoomIn ||
(pinch_phase == PinchPhase::kUpdateZoomOut && zoom_ratio > 1.0)) {
// Get the coordinates of the center of the pinch gesture.
const double pinch_x = *message.FindDouble("pinchX");
const double pinch_y = *message.FindDouble("pinchY");
gfx::Point pinch_center(pinch_x, pinch_y);
// Get the pinch vector which represents the panning caused by the change in
// pinch center between the start and the end of the gesture.
const double pinch_vector_x = *message.FindDouble("pinchVectorX");
const double pinch_vector_y = *message.FindDouble("pinchVectorY");
gfx::Vector2d pinch_vector =
gfx::Vector2d(pinch_vector_x * zoom_ratio, pinch_vector_y * zoom_ratio);
gfx::Vector2d scroll_delta;
// If the rendered document doesn't fill the display area we will
// use `paint_offset` to anchor the paint vertically into the same place.
// We use the scroll bars instead of the pinch vector to get the actual
// position on screen of the paint.
gfx::Vector2d paint_offset;
if (plugin_rect_.width() > GetDocumentPixelWidth() * zoom_ratio) {
// We want to keep the paint in the middle but it must stay in the same
// position relative to the scroll bars.
paint_offset = gfx::Vector2d(0, (1 - zoom_ratio) * pinch_center.y());
scroll_delta = gfx::Vector2d(
0,
(scroll_offset.y() - scroll_offset_at_last_raster_.y() * zoom_ratio));
pinch_vector = gfx::Vector2d();
last_bitmap_smaller_ = true;
} else if (last_bitmap_smaller_) {
// When the document width covers the display area's width, we will anchor
// the scroll bars disregarding where the actual pinch certer is.
pinch_center = gfx::Point((plugin_rect_.width() / device_scale_) / 2,
(plugin_rect_.height() / device_scale_) / 2);
const double zoom_when_doc_covers_plugin_width =
zoom_ * plugin_rect_.width() / GetDocumentPixelWidth();
paint_offset = gfx::Vector2d(
(1 - new_zoom / zoom_when_doc_covers_plugin_width) * pinch_center.x(),
(1 - zoom_ratio) * pinch_center.y());
pinch_vector = gfx::Vector2d();
scroll_delta = gfx::Vector2d(
(scroll_offset.x() - scroll_offset_at_last_raster_.x() * zoom_ratio),
(scroll_offset.y() - scroll_offset_at_last_raster_.y() * zoom_ratio));
}
paint_manager_.SetTransform(zoom_ratio, pinch_center,
pinch_vector + paint_offset + scroll_delta,
true);
needs_reraster_ = false;
return;
}
if (pinch_phase == PinchPhase::kUpdateZoomOut ||
pinch_phase == PinchPhase::kEnd) {
// We reraster on pinch zoom out in order to solve the invalid regions
// that appear after zooming out.
// On pinch end the scale is again 1.f and we request a reraster
// in the new position.
paint_manager_.ClearTransform();
last_bitmap_smaller_ = false;
needs_reraster_ = true;
// If we're rerastering due to zooming out, we need to update the scroll
// offset for the last raster, in case the user continues the gesture by
// zooming in.
scroll_offset_at_last_raster_ = scroll_offset;
}
// Bound the input parameters.
new_zoom = std::max(kMinZoom, new_zoom);
DCHECK(message.FindBool("userInitiated").has_value());
SetZoom(new_zoom);
UpdateScroll(GetScrollPositionFromOffset(scroll_offset));
}
void PdfViewPluginBase::DoPaint(const std::vector<gfx::Rect>& paint_rects,
std::vector<PaintReadyRect>& ready,
std::vector<gfx::Rect>& pending) {
if (image_data_.drawsNothing()) {
DCHECK(plugin_rect_.IsEmpty());
return;
}
PrepareForFirstPaint(ready);
if (!received_viewport_message_ || !needs_reraster_)
return;
engine()->PrePaint();
std::vector<gfx::Rect> ready_rects;
for (const gfx::Rect& paint_rect : paint_rects) {
// Intersect with plugin area since there could be pending invalidates from
// when the plugin area was larger.
gfx::Rect rect =
gfx::IntersectRects(paint_rect, gfx::Rect(plugin_rect_.size()));
if (rect.IsEmpty())
continue;
// Paint the rendering of the PDF document.
gfx::Rect pdf_rect = gfx::IntersectRects(rect, available_area_);
if (!pdf_rect.IsEmpty()) {
pdf_rect.Offset(-available_area_.x(), 0);
std::vector<gfx::Rect> pdf_ready;
std::vector<gfx::Rect> pdf_pending;
engine()->Paint(pdf_rect, image_data_, pdf_ready, pdf_pending);
for (gfx::Rect& ready_rect : pdf_ready) {
ready_rect.Offset(available_area_.OffsetFromOrigin());
ready_rects.push_back(ready_rect);
}
for (gfx::Rect& pending_rect : pdf_pending) {
pending_rect.Offset(available_area_.OffsetFromOrigin());
pending.push_back(pending_rect);
}
}
// Ensure the region above the first page (if any) is filled;
const int32_t first_page_ypos = 0 == engine()->GetNumberOfPages()
? 0
: engine()->GetPageScreenRect(0).y();
if (rect.y() < first_page_ypos) {
gfx::Rect region = gfx::IntersectRects(
rect, gfx::Rect(gfx::Size(plugin_rect_.width(), first_page_ypos)));
image_data_.erase(GetBackgroundColor(), gfx::RectToSkIRect(region));
ready_rects.push_back(region);
}
// Ensure the background parts are filled.
for (const BackgroundPart& background_part : background_parts_) {
gfx::Rect intersection =
gfx::IntersectRects(background_part.location, rect);
if (!intersection.IsEmpty()) {
image_data_.erase(background_part.color,
gfx::RectToSkIRect(intersection));
ready_rects.push_back(intersection);
}
}
}
engine()->PostPaint();
// TODO(crbug.com/1263614): Write pixels directly to the `SkSurface` in
// `PaintManager`, rather than using an intermediate `SkBitmap` and `SkImage`.
sk_sp<SkImage> painted_image = image_data_.asImage();
for (const gfx::Rect& ready_rect : ready_rects)
ready.emplace_back(ready_rect, painted_image);
InvalidateAfterPaintDone();
}
void PdfViewPluginBase::PrepareForFirstPaint(
std::vector<PaintReadyRect>& ready) {
if (!first_paint_)
return;
// Fill the image data buffer with the background color.
first_paint_ = false;
image_data_.eraseColor(GetBackgroundColor());
ready.emplace_back(gfx::SkIRectToRect(image_data_.bounds()),
image_data_.asImage(), /*flush_now=*/true);
}
void PdfViewPluginBase::ClearDeferredInvalidates() {
DCHECK(!in_paint_);
for (const gfx::Rect& rect : deferred_invalidates_)
Invalidate(rect);
deferred_invalidates_.clear();
}
void PdfViewPluginBase::SendThumbnail(base::Value::Dict reply,
Thumbnail thumbnail) {
DCHECK_EQ(*reply.FindString("type"), "getThumbnailReply");
DCHECK(reply.FindString("messageId"));
reply.Set("imageData", thumbnail.TakeData());
reply.Set("width", thumbnail.image_size().width());
reply.Set("height", thumbnail.image_size().height());
SendMessage(std::move(reply));
}
void PdfViewPluginBase::LoadAccessibility() {
accessibility_state_ = AccessibilityState::kLoaded;
// A new document layout will trigger the creation of a new accessibility
// tree, so `next_accessibility_page_index_` should be reset to ignore
// outdated asynchronous calls of PrepareAndSetAccessibilityPageInfo().
next_accessibility_page_index_ = 0;
SetAccessibilityDocInfo(GetAccessibilityDocInfo());
// If the document contents isn't accessible, don't send anything more.
if (!(engine_->HasPermission(DocumentPermission::kCopy) ||
engine_->HasPermission(DocumentPermission::kCopyAccessible))) {
return;
}
PrepareAndSetAccessibilityViewportInfo();
// Schedule loading the first page.
base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
FROM_HERE,
base::BindOnce(&PdfViewPluginBase::PrepareAndSetAccessibilityPageInfo,
GetWeakPtr(), /*page_index=*/0),
kAccessibilityPageDelay);
}
void PdfViewPluginBase::DidOpen(std::unique_ptr<UrlLoader> loader,
int32_t result) {
if (result == kSuccess) {
if (!engine()->HandleDocumentLoad(std::move(loader), GetURL())) {
document_load_state_ = DocumentLoadState::kLoading;
DocumentLoadFailed();
}
} else if (result != kErrorAborted) {
DocumentLoadFailed();
}
}
void PdfViewPluginBase::DidOpenPreview(std::unique_ptr<UrlLoader> loader,
int32_t result) {
DCHECK_EQ(result, kSuccess);
preview_client_ = std::make_unique<PreviewModeClient>(this);
preview_engine_ = CreateEngine(preview_client_.get(),
PDFiumFormFiller::ScriptOption::kNoJavaScript);
preview_engine_->PluginSizeUpdated({});
preview_engine_->HandleDocumentLoad(std::move(loader), GetURL());
}
void PdfViewPluginBase::OnPrintPreviewLoaded() {
// Scroll location is retained across document loads in print preview mode, so
// there's no need to override the scroll position by scrolling again.
if (IsPreviewingPDF(print_preview_page_count_)) {
SendPrintPreviewLoadedNotification();
} else {
DCHECK_EQ(0, print_preview_loaded_page_count_);
print_preview_loaded_page_count_ = 1;
AppendBlankPrintPreviewPages();
}
OnGeometryChanged(0, 0);
if (!document_size_.IsEmpty())
paint_manager_.InvalidateRect(gfx::Rect(plugin_rect_.size()));
}
void PdfViewPluginBase::AppendBlankPrintPreviewPages() {
engine()->AppendBlankPages(print_preview_page_count_);
LoadNextPreviewPage();
}
void PdfViewPluginBase::ProcessPreviewPageInfo(const std::string& url,
int dest_page_index) {
DCHECK(IsPrintPreview());
DCHECK_GE(dest_page_index, 0);
DCHECK_LT(dest_page_index, print_preview_page_count_);
// Print Preview JS will send the loadPreviewPage message for every page,
// including the first page in the print preview, which has already been
// loaded when handing the resetPrintPreviewMode message. Just ignore it.
if (dest_page_index == 0)
return;
int src_page_index = ExtractPrintPreviewPageIndex(url);
DCHECK_GE(src_page_index, 0);
preview_pages_info_.push(std::make_pair(url, dest_page_index));
LoadAvailablePreviewPage();
}
void PdfViewPluginBase::LoadAvailablePreviewPage() {
if (preview_pages_info_.empty() ||
document_load_state_ != DocumentLoadState::kComplete ||
preview_document_load_state_ == DocumentLoadState::kLoading) {
return;
}
preview_document_load_state_ = DocumentLoadState::kLoading;
const std::string& url = preview_pages_info_.front().first;
// Note that `last_progress_sent_` is not reset for preview page loads.
LoadUrl(url,
base::BindOnce(&PdfViewPluginBase::DidOpenPreview, GetWeakPtr()));
}
void PdfViewPluginBase::LoadNextPreviewPage() {
if (!preview_pages_info_.empty()) {
DCHECK_LT(print_preview_loaded_page_count_, print_preview_page_count_);
LoadAvailablePreviewPage();
return;
}
if (print_preview_loaded_page_count_ == print_preview_page_count_)
SendPrintPreviewLoadedNotification();
}
gfx::Point PdfViewPluginBase::FrameToPdfCoordinates(
const gfx::PointF& frame_coordinates) const {
// TODO(crbug.com/1288847): Use methods on `blink::WebPluginContainer`.
return gfx::ToFlooredPoint(
gfx::ScalePoint(frame_coordinates, device_scale_)) -
plugin_offset_in_frame() - gfx::Vector2d(available_area_.x(), 0);
}
} // namespace chrome_pdf