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out_of_process_instance.cc
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out_of_process_instance.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/out_of_process_instance.h"
#include <stddef.h>
#include <stdint.h>
#include <algorithm> // for min/max()
#define _USE_MATH_DEFINES // for M_PI
#include <cmath> // for log() and pow()
#include <math.h>
#include <list>
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/common/content_restriction.h"
#include "net/base/escape.h"
#include "pdf/pdf.h"
#include "ppapi/c/dev/ppb_cursor_control_dev.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/c/pp_rect.h"
#include "ppapi/c/private/ppb_instance_private.h"
#include "ppapi/c/private/ppp_pdf.h"
#include "ppapi/c/trusted/ppb_url_loader_trusted.h"
#include "ppapi/cpp/core.h"
#include "ppapi/cpp/dev/memory_dev.h"
#include "ppapi/cpp/dev/text_input_dev.h"
#include "ppapi/cpp/dev/url_util_dev.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/point.h"
#include "ppapi/cpp/private/pdf.h"
#include "ppapi/cpp/private/var_private.h"
#include "ppapi/cpp/rect.h"
#include "ppapi/cpp/resource.h"
#include "ppapi/cpp/url_request_info.h"
#include "ppapi/cpp/var_array.h"
#include "ppapi/cpp/var_dictionary.h"
#include "ui/events/keycodes/keyboard_codes.h"
namespace chrome_pdf {
const char kChromePrint[] = "chrome://print/";
const char kChromeExtension[] =
"chrome-extension://mhjfbmdgcfjbbpaeojofohoefgiehjai";
// Constants used in handling postMessage() messages.
const char kType[] = "type";
// Viewport message arguments. (Page -> Plugin).
const char kJSViewportType[] = "viewport";
const char kJSXOffset[] = "xOffset";
const char kJSYOffset[] = "yOffset";
const char kJSZoom[] = "zoom";
// Stop scrolling message (Page -> Plugin)
const char kJSStopScrollingType[] = "stopScrolling";
// Document dimension arguments (Plugin -> Page).
const char kJSDocumentDimensionsType[] = "documentDimensions";
const char kJSDocumentWidth[] = "width";
const char kJSDocumentHeight[] = "height";
const char kJSPageDimensions[] = "pageDimensions";
const char kJSPageX[] = "x";
const char kJSPageY[] = "y";
const char kJSPageWidth[] = "width";
const char kJSPageHeight[] = "height";
// Document load progress arguments (Plugin -> Page)
const char kJSLoadProgressType[] = "loadProgress";
const char kJSProgressPercentage[] = "progress";
// Metadata
const char kJSMetadataType[] = "metadata";
const char kJSBookmarks[] = "bookmarks";
const char kJSTitle[] = "title";
// Get password arguments (Plugin -> Page)
const char kJSGetPasswordType[] = "getPassword";
// Get password complete arguments (Page -> Plugin)
const char kJSGetPasswordCompleteType[] = "getPasswordComplete";
const char kJSPassword[] = "password";
// Print (Page -> Plugin)
const char kJSPrintType[] = "print";
// Save (Page -> Plugin)
const char kJSSaveType[] = "save";
// Go to page (Plugin -> Page)
const char kJSGoToPageType[] = "goToPage";
const char kJSPageNumber[] = "page";
// Reset print preview mode (Page -> Plugin)
const char kJSResetPrintPreviewModeType[] = "resetPrintPreviewMode";
const char kJSPrintPreviewUrl[] = "url";
const char kJSPrintPreviewGrayscale[] = "grayscale";
const char kJSPrintPreviewPageCount[] = "pageCount";
// Load preview page (Page -> Plugin)
const char kJSLoadPreviewPageType[] = "loadPreviewPage";
const char kJSPreviewPageUrl[] = "url";
const char kJSPreviewPageIndex[] = "index";
// Set scroll position (Plugin -> Page)
const char kJSSetScrollPositionType[] = "setScrollPosition";
const char kJSPositionX[] = "x";
const char kJSPositionY[] = "y";
// Cancel the stream URL request (Plugin -> Page)
const char kJSCancelStreamUrlType[] = "cancelStreamUrl";
// Navigate to the given URL (Plugin -> Page)
const char kJSNavigateType[] = "navigate";
const char kJSNavigateUrl[] = "url";
const char kJSNavigateNewTab[] = "newTab";
// Open the email editor with the given parameters (Plugin -> Page)
const char kJSEmailType[] = "email";
const char kJSEmailTo[] = "to";
const char kJSEmailCc[] = "cc";
const char kJSEmailBcc[] = "bcc";
const char kJSEmailSubject[] = "subject";
const char kJSEmailBody[] = "body";
// Rotation (Page -> Plugin)
const char kJSRotateClockwiseType[] = "rotateClockwise";
const char kJSRotateCounterclockwiseType[] = "rotateCounterclockwise";
// Select all text in the document (Page -> Plugin)
const char kJSSelectAllType[] = "selectAll";
// Get the selected text in the document (Page -> Plugin)
const char kJSGetSelectedTextType[] = "getSelectedText";
// Reply with selected text (Plugin -> Page)
const char kJSGetSelectedTextReplyType[] = "getSelectedTextReply";
const char kJSSelectedText[] = "selectedText";
// Get the named destination with the given name (Page -> Plugin)
const char KJSGetNamedDestinationType[] = "getNamedDestination";
const char KJSGetNamedDestination[] = "namedDestination";
// Reply with the page number of the named destination (Plugin -> Page)
const char kJSGetNamedDestinationReplyType[] = "getNamedDestinationReply";
const char kJSNamedDestinationPageNumber[] = "pageNumber";
// Selecting text in document (Plugin -> Page)
const char kJSSetIsSelectingType[] = "setIsSelecting";
const char kJSIsSelecting[] = "isSelecting";
// Notify when a form field is focused (Plugin -> Page)
const char kJSFieldFocusType[] = "formFocusChange";
const char kJSFieldFocus[] = "focused";
const int kFindResultCooldownMs = 100;
// A delay to wait between each accessibility page to keep the system
// responsive.
const int kAccessibilityPageDelayMs = 100;
const double kMinZoom = 0.01;
namespace {
static const char kPPPPdfInterface[] = PPP_PDF_INTERFACE_1;
// Used for UMA. Do not delete entries, and keep in sync with histograms.xml.
enum PDFFeatures {
LOADED_DOCUMENT = 0,
HAS_TITLE = 1,
HAS_BOOKMARKS = 2,
FEATURES_COUNT
};
PP_Var GetLinkAtPosition(PP_Instance instance, PP_Point point) {
pp::Var var;
void* object = pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
if (object) {
var = static_cast<OutOfProcessInstance*>(object)->GetLinkAtPosition(
pp::Point(point));
}
return var.Detach();
}
void Transform(PP_Instance instance, PP_PrivatePageTransformType type) {
void* object =
pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
if (object) {
OutOfProcessInstance* obj_instance =
static_cast<OutOfProcessInstance*>(object);
switch (type) {
case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CW:
obj_instance->RotateClockwise();
break;
case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CCW:
obj_instance->RotateCounterclockwise();
break;
}
}
}
PP_Bool GetPrintPresetOptionsFromDocument(
PP_Instance instance,
PP_PdfPrintPresetOptions_Dev* options) {
void* object = pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
if (object) {
OutOfProcessInstance* obj_instance =
static_cast<OutOfProcessInstance*>(object);
obj_instance->GetPrintPresetOptionsFromDocument(options);
}
return PP_TRUE;
}
void EnableAccessibility(PP_Instance instance) {
void* object = pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
if (object) {
OutOfProcessInstance* obj_instance =
static_cast<OutOfProcessInstance*>(object);
return obj_instance->EnableAccessibility();
}
}
const PPP_Pdf ppp_private = {
&GetLinkAtPosition,
&Transform,
&GetPrintPresetOptionsFromDocument,
&EnableAccessibility,
};
int ExtractPrintPreviewPageIndex(const std::string& src_url) {
// Sample |src_url| format: chrome://print/id/page_index/print.pdf
std::vector<std::string> url_substr = base::SplitString(
src_url.substr(strlen(kChromePrint)), "/",
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
if (url_substr.size() != 3)
return -1;
if (url_substr[2] != "print.pdf")
return -1;
int page_index = 0;
if (!base::StringToInt(url_substr[1], &page_index))
return -1;
return page_index;
}
bool IsPrintPreviewUrl(const std::string& url) {
return url.substr(0, strlen(kChromePrint)) == kChromePrint;
}
void ScalePoint(float scale, pp::Point* point) {
point->set_x(static_cast<int>(point->x() * scale));
point->set_y(static_cast<int>(point->y() * scale));
}
void ScaleRect(float scale, pp::Rect* rect) {
int left = static_cast<int>(floorf(rect->x() * scale));
int top = static_cast<int>(floorf(rect->y() * scale));
int right = static_cast<int>(ceilf((rect->x() + rect->width()) * scale));
int bottom = static_cast<int>(ceilf((rect->y() + rect->height()) * scale));
rect->SetRect(left, top, right - left, bottom - top);
}
// TODO(raymes): Remove this dependency on VarPrivate/InstancePrivate. It's
// needed right now to do a synchronous call to JavaScript, but we could easily
// replace this with a custom PPB_PDF function.
pp::Var ModalDialog(const pp::Instance* instance,
const std::string& type,
const std::string& message,
const std::string& default_answer) {
const PPB_Instance_Private* interface =
reinterpret_cast<const PPB_Instance_Private*>(
pp::Module::Get()->GetBrowserInterface(
PPB_INSTANCE_PRIVATE_INTERFACE));
pp::VarPrivate window(pp::PASS_REF,
interface->GetWindowObject(instance->pp_instance()));
if (default_answer.empty())
return window.Call(type, message);
else
return window.Call(type, message, default_answer);
}
} // namespace
OutOfProcessInstance::OutOfProcessInstance(PP_Instance instance)
: pp::Instance(instance),
pp::Find_Private(this),
pp::Printing_Dev(this),
cursor_(PP_CURSORTYPE_POINTER),
zoom_(1.0),
device_scale_(1.0),
full_(false),
paint_manager_(this, this, true),
first_paint_(true),
document_load_state_(LOAD_STATE_LOADING),
preview_document_load_state_(LOAD_STATE_COMPLETE),
uma_(this),
told_browser_about_unsupported_feature_(false),
print_preview_page_count_(0),
last_progress_sent_(0),
recently_sent_find_update_(false),
received_viewport_message_(false),
did_call_start_loading_(false),
stop_scrolling_(false),
background_color_(0),
top_toolbar_height_(0),
accessibility_state_(ACCESSIBILITY_STATE_OFF) {
loader_factory_.Initialize(this);
timer_factory_.Initialize(this);
form_factory_.Initialize(this);
print_callback_factory_.Initialize(this);
engine_.reset(PDFEngine::Create(this));
pp::Module::Get()->AddPluginInterface(kPPPPdfInterface, &ppp_private);
AddPerInstanceObject(kPPPPdfInterface, this);
RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_MOUSE);
RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_KEYBOARD);
RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_TOUCH);
}
OutOfProcessInstance::~OutOfProcessInstance() {
RemovePerInstanceObject(kPPPPdfInterface, this);
// Explicitly reset the PDFEngine during destruction as it may call back into
// this object.
engine_.reset();
}
bool OutOfProcessInstance::Init(uint32_t argc,
const char* argn[],
const char* argv[]) {
// Check if the PDF is being loaded in the PDF chrome extension. We only allow
// the plugin to be loaded in the extension and print preview to avoid
// exposing sensitive APIs directly to external websites.
pp::Var document_url_var = pp::URLUtil_Dev::Get()->GetDocumentURL(this);
if (!document_url_var.is_string())
return false;
std::string document_url = document_url_var.AsString();
std::string extension_url = std::string(kChromeExtension);
std::string print_preview_url = std::string(kChromePrint);
if (!base::StringPiece(document_url).starts_with(kChromeExtension) &&
!base::StringPiece(document_url).starts_with(kChromePrint)) {
return false;
}
// Check if the plugin is full frame. This is passed in from JS.
for (uint32_t i = 0; i < argc; ++i) {
if (strcmp(argn[i], "full-frame") == 0) {
full_ = true;
break;
}
}
// Only allow the plugin to handle find requests if it is full frame.
if (full_)
SetPluginToHandleFindRequests();
text_input_.reset(new pp::TextInput_Dev(this));
const char* stream_url = nullptr;
const char* original_url = nullptr;
const char* headers = nullptr;
for (uint32_t i = 0; i < argc; ++i) {
bool success = true;
if (strcmp(argn[i], "src") == 0)
original_url = argv[i];
else if (strcmp(argn[i], "stream-url") == 0)
stream_url = argv[i];
else if (strcmp(argn[i], "headers") == 0)
headers = argv[i];
else if (strcmp(argn[i], "background-color") == 0)
success = base::HexStringToUInt(argv[i], &background_color_);
else if (strcmp(argn[i], "top-toolbar-height") == 0)
success = base::StringToInt(argv[i], &top_toolbar_height_);
if (!success)
return false;
}
if (!original_url)
return false;
if (!stream_url)
stream_url = original_url;
// 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 (IsPrintPreviewUrl(original_url))
return true;
LoadUrl(stream_url);
url_ = original_url;
return engine_->New(original_url, headers);
}
void OutOfProcessInstance::HandleMessage(const pp::Var& message) {
pp::VarDictionary dict(message);
if (!dict.Get(kType).is_string()) {
NOTREACHED();
return;
}
std::string type = dict.Get(kType).AsString();
if (type == kJSViewportType &&
dict.Get(pp::Var(kJSXOffset)).is_number() &&
dict.Get(pp::Var(kJSYOffset)).is_number() &&
dict.Get(pp::Var(kJSZoom)).is_number()) {
received_viewport_message_ = true;
stop_scrolling_ = false;
double zoom = dict.Get(pp::Var(kJSZoom)).AsDouble();
pp::FloatPoint scroll_offset(dict.Get(pp::Var(kJSXOffset)).AsDouble(),
dict.Get(pp::Var(kJSYOffset)).AsDouble());
// Bound the input parameters.
zoom = std::max(kMinZoom, zoom);
SetZoom(zoom);
scroll_offset = BoundScrollOffsetToDocument(scroll_offset);
engine_->ScrolledToXPosition(scroll_offset.x() * device_scale_);
engine_->ScrolledToYPosition(scroll_offset.y() * device_scale_);
} else if (type == kJSGetPasswordCompleteType &&
dict.Get(pp::Var(kJSPassword)).is_string()) {
if (password_callback_) {
pp::CompletionCallbackWithOutput<pp::Var> callback = *password_callback_;
password_callback_.reset();
*callback.output() = dict.Get(pp::Var(kJSPassword)).pp_var();
callback.Run(PP_OK);
} else {
NOTREACHED();
}
} else if (type == kJSPrintType) {
Print();
} else if (type == kJSSaveType) {
pp::PDF::SaveAs(this);
} else if (type == kJSRotateClockwiseType) {
RotateClockwise();
} else if (type == kJSRotateCounterclockwiseType) {
RotateCounterclockwise();
} else if (type == kJSSelectAllType) {
engine_->SelectAll();
} else if (type == kJSResetPrintPreviewModeType &&
dict.Get(pp::Var(kJSPrintPreviewUrl)).is_string() &&
dict.Get(pp::Var(kJSPrintPreviewGrayscale)).is_bool() &&
dict.Get(pp::Var(kJSPrintPreviewPageCount)).is_int()) {
url_ = dict.Get(pp::Var(kJSPrintPreviewUrl)).AsString();
preview_pages_info_ = std::queue<PreviewPageInfo>();
preview_document_load_state_ = LOAD_STATE_COMPLETE;
document_load_state_ = LOAD_STATE_LOADING;
LoadUrl(url_);
preview_engine_.reset();
engine_.reset(PDFEngine::Create(this));
engine_->SetGrayscale(dict.Get(pp::Var(kJSPrintPreviewGrayscale)).AsBool());
engine_->New(url_.c_str(), nullptr /* empty header */);
print_preview_page_count_ =
std::max(dict.Get(pp::Var(kJSPrintPreviewPageCount)).AsInt(), 0);
paint_manager_.InvalidateRect(pp::Rect(pp::Point(), plugin_size_));
} else if (type == kJSLoadPreviewPageType &&
dict.Get(pp::Var(kJSPreviewPageUrl)).is_string() &&
dict.Get(pp::Var(kJSPreviewPageIndex)).is_int()) {
ProcessPreviewPageInfo(dict.Get(pp::Var(kJSPreviewPageUrl)).AsString(),
dict.Get(pp::Var(kJSPreviewPageIndex)).AsInt());
} else if (type == kJSStopScrollingType) {
stop_scrolling_ = true;
} else if (type == kJSGetSelectedTextType) {
std::string selected_text = engine_->GetSelectedText();
// Always return unix newlines to JS.
base::ReplaceChars(selected_text, "\r", std::string(), &selected_text);
pp::VarDictionary reply;
reply.Set(pp::Var(kType), pp::Var(kJSGetSelectedTextReplyType));
reply.Set(pp::Var(kJSSelectedText), selected_text);
PostMessage(reply);
} else if (type == KJSGetNamedDestinationType &&
dict.Get(pp::Var(KJSGetNamedDestination)).is_string()) {
int page_number = engine_->GetNamedDestinationPage(
dict.Get(pp::Var(KJSGetNamedDestination)).AsString());
pp::VarDictionary reply;
reply.Set(pp::Var(kType), pp::Var(kJSGetNamedDestinationReplyType));
if (page_number >= 0)
reply.Set(pp::Var(kJSNamedDestinationPageNumber), page_number);
PostMessage(reply);
} else {
NOTREACHED();
}
}
bool OutOfProcessInstance::HandleInputEvent(
const pp::InputEvent& event) {
// To simplify things, convert the event into device coordinates if it is
// a mouse event.
pp::InputEvent event_device_res(event);
{
pp::MouseInputEvent mouse_event(event);
if (!mouse_event.is_null()) {
pp::Point point = mouse_event.GetPosition();
pp::Point movement = mouse_event.GetMovement();
ScalePoint(device_scale_, &point);
ScalePoint(device_scale_, &movement);
mouse_event = pp::MouseInputEvent(
this,
event.GetType(),
event.GetTimeStamp(),
event.GetModifiers(),
mouse_event.GetButton(),
point,
mouse_event.GetClickCount(),
movement);
event_device_res = mouse_event;
}
}
pp::InputEvent offset_event(event_device_res);
switch (offset_event.GetType()) {
case PP_INPUTEVENT_TYPE_MOUSEDOWN:
case PP_INPUTEVENT_TYPE_MOUSEUP:
case PP_INPUTEVENT_TYPE_MOUSEMOVE:
case PP_INPUTEVENT_TYPE_MOUSEENTER:
case PP_INPUTEVENT_TYPE_MOUSELEAVE: {
pp::MouseInputEvent mouse_event(event_device_res);
pp::MouseInputEvent mouse_event_dip(event);
pp::Point point = mouse_event.GetPosition();
point.set_x(point.x() - available_area_.x());
offset_event = pp::MouseInputEvent(
this,
event.GetType(),
event.GetTimeStamp(),
event.GetModifiers(),
mouse_event.GetButton(),
point,
mouse_event.GetClickCount(),
mouse_event.GetMovement());
break;
}
default:
break;
}
if (engine_->HandleEvent(offset_event))
return true;
// Middle click is used for scrolling and is handled by the container page.
pp::MouseInputEvent mouse_event(event_device_res);
if (!mouse_event.is_null() &&
mouse_event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_MIDDLE) {
return false;
}
// Return true for unhandled clicks so the plugin takes focus.
return (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEDOWN);
}
void OutOfProcessInstance::DidChangeView(const pp::View& view) {
pp::Rect view_rect(view.GetRect());
float old_device_scale = device_scale_;
float device_scale = view.GetDeviceScale();
pp::Size view_device_size(view_rect.width() * device_scale,
view_rect.height() * device_scale);
if (view_device_size != plugin_size_ || device_scale != device_scale_) {
device_scale_ = device_scale;
plugin_dip_size_ = view_rect.size();
plugin_size_ = view_device_size;
paint_manager_.SetSize(view_device_size, device_scale_);
pp::Size new_image_data_size = PaintManager::GetNewContextSize(
image_data_.size(),
plugin_size_);
if (new_image_data_size != image_data_.size()) {
image_data_ = pp::ImageData(this,
PP_IMAGEDATAFORMAT_BGRA_PREMUL,
new_image_data_size,
false);
first_paint_ = true;
}
if (image_data_.is_null()) {
DCHECK(plugin_size_.IsEmpty());
return;
}
OnGeometryChanged(zoom_, old_device_scale);
}
if (!stop_scrolling_) {
pp::Point scroll_offset(view.GetScrollOffset());
// Because view messages come from the DOM, the coordinates of the viewport
// are 0-based (i.e. they do not correspond to the viewport's coordinates in
// JS), so we need to subtract the toolbar height to convert them into
// viewport coordinates.
pp::FloatPoint scroll_offset_float(scroll_offset.x(),
scroll_offset.y() - top_toolbar_height_);
scroll_offset_float = BoundScrollOffsetToDocument(scroll_offset_float);
engine_->ScrolledToXPosition(scroll_offset_float.x() * device_scale_);
engine_->ScrolledToYPosition(scroll_offset_float.y() * device_scale_);
}
}
void OutOfProcessInstance::GetPrintPresetOptionsFromDocument(
PP_PdfPrintPresetOptions_Dev* options) {
options->is_scaling_disabled = PP_FromBool(IsPrintScalingDisabled());
options->duplex =
static_cast<PP_PrivateDuplexMode_Dev>(engine_->GetDuplexType());
options->copies = engine_->GetCopiesToPrint();
pp::Size uniform_page_size;
options->is_page_size_uniform =
PP_FromBool(engine_->GetPageSizeAndUniformity(&uniform_page_size));
options->uniform_page_size = uniform_page_size;
}
void OutOfProcessInstance::EnableAccessibility() {
if (accessibility_state_ == ACCESSIBILITY_STATE_LOADED)
return;
if (accessibility_state_ == ACCESSIBILITY_STATE_OFF)
accessibility_state_ = ACCESSIBILITY_STATE_PENDING;
if (document_load_state_ == LOAD_STATE_COMPLETE)
LoadAccessibility();
}
void OutOfProcessInstance::LoadAccessibility() {
accessibility_state_ = ACCESSIBILITY_STATE_LOADED;
PP_PrivateAccessibilityDocInfo doc_info;
doc_info.page_count = engine_->GetNumberOfPages();
doc_info.text_accessible = PP_FromBool(
engine_->HasPermission(PDFEngine::PERMISSION_COPY_ACCESSIBLE));
doc_info.text_copyable = PP_FromBool(
engine_->HasPermission(PDFEngine::PERMISSION_COPY));
pp::PDF::SetAccessibilityDocInfo(GetPluginInstance(), &doc_info);
// If the document contents isn't accessible, don't send anything more.
if (!(engine_->HasPermission(PDFEngine::PERMISSION_COPY) ||
engine_->HasPermission(PDFEngine::PERMISSION_COPY_ACCESSIBLE))) {
return;
}
PP_PrivateAccessibilityViewportInfo viewport_info;
viewport_info.scroll.x = 0;
viewport_info.scroll.y = -top_toolbar_height_ * device_scale_;
viewport_info.offset = available_area_.point();
viewport_info.zoom = zoom_ * device_scale_;
pp::PDF::SetAccessibilityViewportInfo(GetPluginInstance(), &viewport_info);
// Schedule loading the first page.
pp::CompletionCallback callback = timer_factory_.NewCallback(
&OutOfProcessInstance::SendNextAccessibilityPage);
pp::Module::Get()->core()->CallOnMainThread(kAccessibilityPageDelayMs,
callback, 0);
}
void OutOfProcessInstance::SendNextAccessibilityPage(int32_t page_index) {
int page_count = engine_->GetNumberOfPages();
if (page_index < 0 || page_index >= page_count)
return;
int char_count = engine_->GetCharCount(page_index);
PP_PrivateAccessibilityPageInfo page_info;
page_info.page_index = page_index;
page_info.bounds = engine_->GetPageBoundsRect(page_index);
page_info.char_count = char_count;
std::vector<PP_PrivateAccessibilityCharInfo> chars(page_info.char_count);
for (uint32_t i = 0; i < page_info.char_count; ++i) {
chars[i].unicode_character = engine_->GetCharUnicode(page_index, i);
}
std::vector<PP_PrivateAccessibilityTextRunInfo> text_runs;
int char_index = 0;
while (char_index < char_count) {
PP_PrivateAccessibilityTextRunInfo text_run_info;
pp::FloatRect bounds;
engine_->GetTextRunInfo(page_index, char_index, &text_run_info.len,
&text_run_info.font_size, &bounds);
DCHECK_LE(char_index + text_run_info.len,
static_cast<uint32_t>(char_count));
text_run_info.direction = PP_PRIVATEDIRECTION_LTR;
text_run_info.bounds = bounds;
text_runs.push_back(text_run_info);
// We need to provide enough information to draw a bounding box
// around any arbitrary text range, but the bounding boxes of characters
// we get from PDFium don't necessarily "line up". Walk through the
// characters in each text run and let the width of each character be
// the difference between the x coordinate of one character and the
// x coordinate of the next. The rest of the bounds of each character
// can be computed from the bounds of the text run.
pp::FloatRect char_bounds = engine_->GetCharBounds(page_index, char_index);
for (uint32_t i = 0; i < text_run_info.len - 1; i++) {
DCHECK_LT(char_index + i + 1,
static_cast<uint32_t>(char_count));
pp::FloatRect next_char_bounds = engine_->GetCharBounds(
page_index, char_index + i + 1);
chars[char_index + i].char_width = next_char_bounds.x() - char_bounds.x();
char_bounds = next_char_bounds;
}
chars[char_index + text_run_info.len - 1].char_width = char_bounds.width();
char_index += text_run_info.len;
}
page_info.text_run_count = text_runs.size();
pp::PDF::SetAccessibilityPageInfo(GetPluginInstance(), &page_info,
text_runs.data(), chars.data());
// Schedule loading the next page.
pp::CompletionCallback callback = timer_factory_.NewCallback(
&OutOfProcessInstance::SendNextAccessibilityPage);
pp::Module::Get()->core()->CallOnMainThread(kAccessibilityPageDelayMs,
callback, page_index + 1);
}
pp::Var OutOfProcessInstance::GetLinkAtPosition(
const pp::Point& point) {
pp::Point offset_point(point);
ScalePoint(device_scale_, &offset_point);
offset_point.set_x(offset_point.x() - available_area_.x());
return engine_->GetLinkAtPosition(offset_point);
}
uint32_t OutOfProcessInstance::QuerySupportedPrintOutputFormats() {
return engine_->QuerySupportedPrintOutputFormats();
}
int32_t OutOfProcessInstance::PrintBegin(
const PP_PrintSettings_Dev& print_settings) {
// For us num_pages 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;
uint32_t supported_formats = engine_->QuerySupportedPrintOutputFormats();
if ((print_settings.format & supported_formats) == 0)
return 0;
print_settings_.is_printing = true;
print_settings_.pepper_print_settings = print_settings;
engine_->PrintBegin();
return ret;
}
pp::Resource OutOfProcessInstance::PrintPages(
const PP_PrintPageNumberRange_Dev* page_ranges,
uint32_t page_range_count) {
if (!print_settings_.is_printing)
return pp::Resource();
print_settings_.print_pages_called_ = true;
return engine_->PrintPages(page_ranges, page_range_count,
print_settings_.pepper_print_settings);
}
void OutOfProcessInstance::PrintEnd() {
if (print_settings_.print_pages_called_)
UserMetricsRecordAction("PDF.PrintPage");
print_settings_.Clear();
engine_->PrintEnd();
}
bool OutOfProcessInstance::IsPrintScalingDisabled() {
return !engine_->GetPrintScaling();
}
bool OutOfProcessInstance::StartFind(const std::string& text,
bool case_sensitive) {
engine_->StartFind(text, case_sensitive);
return true;
}
void OutOfProcessInstance::SelectFindResult(bool forward) {
engine_->SelectFindResult(forward);
}
void OutOfProcessInstance::StopFind() {
engine_->StopFind();
tickmarks_.clear();
SetTickmarks(tickmarks_);
}
void OutOfProcessInstance::OnPaint(
const std::vector<pp::Rect>& paint_rects,
std::vector<PaintManager::ReadyRect>* ready,
std::vector<pp::Rect>* pending) {
if (image_data_.is_null()) {
DCHECK(plugin_size_.IsEmpty());
return;
}
if (first_paint_) {
first_paint_ = false;
pp::Rect rect = pp::Rect(pp::Point(), image_data_.size());
FillRect(rect, background_color_);
ready->push_back(PaintManager::ReadyRect(rect, image_data_, true));
}
if (!received_viewport_message_)
return;
engine_->PrePaint();
for (const auto& paint_rect : paint_rects) {
// Intersect with plugin area since there could be pending invalidates from
// when the plugin area was larger.
pp::Rect rect =
paint_rect.Intersect(pp::Rect(pp::Point(), plugin_size_));
if (rect.IsEmpty())
continue;
pp::Rect pdf_rect = available_area_.Intersect(rect);
if (!pdf_rect.IsEmpty()) {
pdf_rect.Offset(available_area_.x() * -1, 0);
std::vector<pp::Rect> pdf_ready;
std::vector<pp::Rect> pdf_pending;
engine_->Paint(pdf_rect, &image_data_, &pdf_ready, &pdf_pending);
for (auto& ready_rect : pdf_ready) {
ready_rect.Offset(available_area_.point());
ready->push_back(
PaintManager::ReadyRect(ready_rect, image_data_, false));
}
for (auto& pending_rect : pdf_pending) {
pending_rect.Offset(available_area_.point());
pending->push_back(pending_rect);
}
}
// Ensure the region above the first page (if any) is filled;
int32_t first_page_ypos = engine_->GetNumberOfPages() == 0 ?
0 : engine_->GetPageScreenRect(0).y();
if (rect.y() < first_page_ypos) {
pp::Rect region = rect.Intersect(pp::Rect(
pp::Point(), pp::Size(plugin_size_.width(), first_page_ypos)));
ready->push_back(PaintManager::ReadyRect(region, image_data_, false));
FillRect(region, background_color_);
}
for (const auto& background_part : background_parts_) {
pp::Rect intersection = background_part.location.Intersect(rect);
if (!intersection.IsEmpty()) {
FillRect(intersection, background_part.color);
ready->push_back(
PaintManager::ReadyRect(intersection, image_data_, false));
}
}
}
engine_->PostPaint();
}
void OutOfProcessInstance::DidOpen(int32_t result) {
if (result == PP_OK) {
if (!engine_->HandleDocumentLoad(embed_loader_)) {
document_load_state_ = LOAD_STATE_LOADING;
DocumentLoadFailed();
}
} else if (result != PP_ERROR_ABORTED) { // Can happen in tests.
NOTREACHED();
DocumentLoadFailed();
}
// If it's a progressive load, cancel the stream URL request so that requests
// can be made on the original URL.
// TODO(raymes): Make this clearer once the in-process plugin is deleted.
if (engine_->IsProgressiveLoad()) {
pp::VarDictionary message;
message.Set(kType, kJSCancelStreamUrlType);
PostMessage(message);
}
}
void OutOfProcessInstance::DidOpenPreview(int32_t result) {
if (result == PP_OK) {
preview_client_.reset(new PreviewModeClient(this));
preview_engine_.reset(PDFEngine::Create(preview_client_.get()));
preview_engine_->HandleDocumentLoad(embed_preview_loader_);
} else {
NOTREACHED();
}
}
void OutOfProcessInstance::OnClientTimerFired(int32_t id) {
engine_->OnCallback(id);
}
void OutOfProcessInstance::CalculateBackgroundParts() {
background_parts_.clear();
int left_width = available_area_.x();
int right_start = available_area_.right();
int right_width = abs(plugin_size_.width() - available_area_.right());
int bottom = std::min(available_area_.bottom(), plugin_size_.height());
// Add the left, right, and bottom rectangles. Note: we assume only
// horizontal centering.
BackgroundPart part = {
pp::Rect(0, 0, left_width, bottom),
background_color_
};
if (!part.location.IsEmpty())
background_parts_.push_back(part);
part.location = pp::Rect(right_start, 0, right_width, bottom);
if (!part.location.IsEmpty())
background_parts_.push_back(part);
part.location = pp::Rect(
0, bottom, plugin_size_.width(), plugin_size_.height() - bottom);
if (!part.location.IsEmpty())
background_parts_.push_back(part);
}
int OutOfProcessInstance::GetDocumentPixelWidth() const {
return static_cast<int>(ceil(document_size_.width() * zoom_ * device_scale_));
}
int OutOfProcessInstance::GetDocumentPixelHeight() const {
return static_cast<int>(
ceil(document_size_.height() * zoom_ * device_scale_));
}
void OutOfProcessInstance::FillRect(const pp::Rect& rect, uint32_t color) {
DCHECK(!image_data_.is_null() || rect.IsEmpty());
uint32_t* buffer_start = static_cast<uint32_t*>(image_data_.data());
int stride = image_data_.stride();
uint32_t* ptr = buffer_start + rect.y() * stride / 4 + rect.x();
int height = rect.height();
int width = rect.width();
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x)
*(ptr + x) = color;
ptr += stride /4;
}
}
void OutOfProcessInstance::DocumentSizeUpdated(const pp::Size& size) {
document_size_ = size;
pp::VarDictionary dimensions;
dimensions.Set(kType, kJSDocumentDimensionsType);
dimensions.Set(kJSDocumentWidth, pp::Var(document_size_.width()));
dimensions.Set(kJSDocumentHeight, pp::Var(document_size_.height()));
pp::VarArray page_dimensions_array;
int num_pages = engine_->GetNumberOfPages();
for (int i = 0; i < num_pages; ++i) {
pp::Rect page_rect = engine_->GetPageRect(i);
pp::VarDictionary page_dimensions;
page_dimensions.Set(kJSPageX, pp::Var(page_rect.x()));
page_dimensions.Set(kJSPageY, pp::Var(page_rect.y()));
page_dimensions.Set(kJSPageWidth, pp::Var(page_rect.width()));
page_dimensions.Set(kJSPageHeight, pp::Var(page_rect.height()));
page_dimensions_array.Set(i, page_dimensions);
}
dimensions.Set(kJSPageDimensions, page_dimensions_array);
PostMessage(dimensions);
OnGeometryChanged(zoom_, device_scale_);
}
void OutOfProcessInstance::Invalidate(const pp::Rect& rect) {
pp::Rect offset_rect(rect);
offset_rect.Offset(available_area_.point());
paint_manager_.InvalidateRect(offset_rect);
}
void OutOfProcessInstance::Scroll(const pp::Point& point) {
if (!image_data_.is_null())
paint_manager_.ScrollRect(available_area_, point);
}
void OutOfProcessInstance::ScrollToX(int x) {
pp::VarDictionary position;
position.Set(kType, kJSSetScrollPositionType);
position.Set(kJSPositionX, pp::Var(x / device_scale_));
PostMessage(position);
}
void OutOfProcessInstance::ScrollToY(int y) {
pp::VarDictionary position;
position.Set(kType, kJSSetScrollPositionType);
position.Set(kJSPositionY, pp::Var(y / device_scale_));
PostMessage(position);
}
void OutOfProcessInstance::ScrollToPage(int page) {
if (engine_->GetNumberOfPages() == 0)
return;
pp::VarDictionary message;
message.Set(kType, kJSGoToPageType);
message.Set(kJSPageNumber, pp::Var(page));
PostMessage(message);
}
void OutOfProcessInstance::NavigateTo(const std::string& url,
bool open_in_new_tab) {
pp::VarDictionary message;
message.Set(kType, kJSNavigateType);
message.Set(kJSNavigateUrl, url);
message.Set(kJSNavigateNewTab, open_in_new_tab);
PostMessage(message);
}
void OutOfProcessInstance::UpdateCursor(PP_CursorType_Dev cursor) {
if (cursor == cursor_)
return;
cursor_ = cursor;
const PPB_CursorControl_Dev* cursor_interface =
reinterpret_cast<const PPB_CursorControl_Dev*>(
pp::Module::Get()->GetBrowserInterface(PPB_CURSOR_CONTROL_DEV_INTERFACE));
if (!cursor_interface) {
NOTREACHED();
return;
}