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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/instance.h"
#include <algorithm> // for min()
#define _USE_MATH_DEFINES // for M_PI
#include <cmath> // for log() and pow()
#include <math.h>
#include <list>
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#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/values.h"
#include "chrome/browser/chrome_page_zoom_constants.h"
#include "chrome/common/content_restriction.h"
#include "content/public/common/page_zoom.h"
#include "net/base/escape.h"
#include "pdf/draw_utils.h"
#include "pdf/number_image_generator.h"
#include "pdf/pdf.h"
#include "pdf/resource_consts.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/ppp_pdf.h"
#include "ppapi/c/trusted/ppb_url_loader_trusted.h"
#include "ppapi/cpp/core.h"
#include "ppapi/cpp/dev/font_dev.h"
#include "ppapi/cpp/dev/memory_dev.h"
#include "ppapi/cpp/dev/text_input_dev.h"
#include "ppapi/cpp/module.h"
#include "ppapi/cpp/point.h"
#include "ppapi/cpp/private/pdf.h"
#include "ppapi/cpp/rect.h"
#include "ppapi/cpp/resource.h"
#include "ppapi/cpp/url_request_info.h"
#include "ui/events/keycodes/keyboard_codes.h"
#if defined(OS_MACOSX)
#include "base/mac/mac_util.h"
#endif
namespace chrome_pdf {
struct ToolbarButtonInfo {
uint32 id;
Button::ButtonStyle style;
PP_ResourceImage normal;
PP_ResourceImage highlighted;
PP_ResourceImage pressed;
};
namespace {
// Uncomment following #define to enable thumbnails.
// #define ENABLE_THUMBNAILS
const uint32 kToolbarSplashTimeoutMs = 6000;
const uint32 kMessageTextColor = 0xFF575757;
const uint32 kMessageTextSize = 22;
const uint32 kProgressFadeTimeoutMs = 250;
const uint32 kProgressDelayTimeoutMs = 1000;
const uint32 kAutoScrollTimeoutMs = 50;
const double kAutoScrollFactor = 0.2;
// Javascript methods.
const char kJSAccessibility[] = "accessibility";
const char kJSDocumentLoadComplete[] = "documentLoadComplete";
const char kJSGetHeight[] = "getHeight";
const char kJSGetHorizontalScrollbarThickness[] =
"getHorizontalScrollbarThickness";
const char kJSGetPageLocationNormalized[] = "getPageLocationNormalized";
const char kJSGetVerticalScrollbarThickness[] = "getVerticalScrollbarThickness";
const char kJSGetWidth[] = "getWidth";
const char kJSGetZoomLevel[] = "getZoomLevel";
const char kJSGoToPage[] = "goToPage";
const char kJSGrayscale[] = "grayscale";
const char kJSLoadPreviewPage[] = "loadPreviewPage";
const char kJSOnLoad[] = "onload";
const char kJSOnPluginSizeChanged[] = "onPluginSizeChanged";
const char kJSOnScroll[] = "onScroll";
const char kJSPageXOffset[] = "pageXOffset";
const char kJSPageYOffset[] = "pageYOffset";
const char kJSPrintPreviewPageCount[] = "printPreviewPageCount";
const char kJSReload[] = "reload";
const char kJSRemovePrintButton[] = "removePrintButton";
const char kJSResetPrintPreviewUrl[] = "resetPrintPreviewUrl";
const char kJSSendKeyEvent[] = "sendKeyEvent";
const char kJSSetPageNumbers[] = "setPageNumbers";
const char kJSSetPageXOffset[] = "setPageXOffset";
const char kJSSetPageYOffset[] = "setPageYOffset";
const char kJSSetZoomLevel[] = "setZoomLevel";
const char kJSZoomFitToHeight[] = "fitToHeight";
const char kJSZoomFitToWidth[] = "fitToWidth";
const char kJSZoomIn[] = "zoomIn";
const char kJSZoomOut[] = "zoomOut";
// URL reference parameters.
// For more possible parameters, see RFC 3778 and the "PDF Open Parameters"
// document from Adobe.
const char kDelimiters[] = "#&";
const char kNamedDest[] = "nameddest";
const char kPage[] = "page";
const char kChromePrint[] = "chrome://print/";
// Dictionary Value key names for the document accessibility info
const char kAccessibleNumberOfPages[] = "numberOfPages";
const char kAccessibleLoaded[] = "loaded";
const char kAccessibleCopyable[] = "copyable";
const ToolbarButtonInfo kPDFToolbarButtons[] = {
{ kFitToPageButtonId, Button::BUTTON_STATE,
PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
{ kFitToWidthButtonId, Button::BUTTON_STATE,
PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
{ kZoomOutButtonId, Button::BUTTON_CLICKABLE,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
{ kZoomInButtonId, Button::BUTTON_CLICKABLE,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_PRESSED },
{ kSaveButtonId, Button::BUTTON_CLICKABLE,
PP_RESOURCEIMAGE_PDF_BUTTON_SAVE,
PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_PRESSED },
{ kPrintButtonId, Button::BUTTON_CLICKABLE,
PP_RESOURCEIMAGE_PDF_BUTTON_PRINT,
PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_PRESSED },
};
const ToolbarButtonInfo kPDFNoPrintToolbarButtons[] = {
{ kFitToPageButtonId, Button::BUTTON_STATE,
PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
{ kFitToWidthButtonId, Button::BUTTON_STATE,
PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
{ kZoomOutButtonId, Button::BUTTON_CLICKABLE,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
{ kZoomInButtonId, Button::BUTTON_CLICKABLE,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_PRESSED },
{ kSaveButtonId, Button::BUTTON_CLICKABLE,
PP_RESOURCEIMAGE_PDF_BUTTON_SAVE,
PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_SAVE_PRESSED },
{ kPrintButtonId, Button::BUTTON_CLICKABLE,
PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED,
PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED,
PP_RESOURCEIMAGE_PDF_BUTTON_PRINT_DISABLED }
};
const ToolbarButtonInfo kPrintPreviewToolbarButtons[] = {
{ kFitToPageButtonId, Button::BUTTON_STATE,
PP_RESOURCEIMAGE_PDF_BUTTON_FTP,
PP_RESOURCEIMAGE_PDF_BUTTON_FTP_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_FTP_PRESSED },
{ kFitToWidthButtonId, Button::BUTTON_STATE,
PP_RESOURCEIMAGE_PDF_BUTTON_FTW,
PP_RESOURCEIMAGE_PDF_BUTTON_FTW_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_FTW_PRESSED },
{ kZoomOutButtonId, Button::BUTTON_CLICKABLE,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMOUT_PRESSED },
{ kZoomInButtonId, Button::BUTTON_CLICKABLE,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END_HOVER,
PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN_END_PRESSED },
};
static const char kPPPPdfInterface[] = PPP_PDF_INTERFACE_1;
PP_Var GetLinkAtPosition(PP_Instance instance, PP_Point point) {
pp::Var var;
void* object =
pp::Instance::GetPerInstanceObject(instance, kPPPPdfInterface);
if (object)
var = static_cast<Instance*>(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) {
Instance* obj_instance = static_cast<Instance*>(object);
switch (type) {
case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CW:
obj_instance->RotateClockwise();
break;
case PP_PRIVATEPAGETRANSFORMTYPE_ROTATE_90_CCW:
obj_instance->RotateCounterclockwise();
break;
}
}
}
const PPP_Pdf ppp_private = {
&GetLinkAtPosition,
&Transform
};
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)), '/', &url_substr);
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);
}
template<class T>
T ClipToRange(T value, T lower_boundary, T upper_boundary) {
DCHECK(lower_boundary <= upper_boundary);
return std::max<T>(lower_boundary, std::min<T>(value, upper_boundary));
}
} // namespace
Instance::Instance(PP_Instance instance)
: pp::InstancePrivate(instance),
pp::Find_Private(this),
pp::Printing_Dev(this),
pp::Selection_Dev(this),
pp::WidgetClient_Dev(this),
pp::Zoom_Dev(this),
cursor_(PP_CURSORTYPE_POINTER),
timer_pending_(false),
current_timer_id_(0),
zoom_(1.0),
device_scale_(1.0),
printing_enabled_(true),
hidpi_enabled_(false),
full_(IsFullFrame()),
zoom_mode_(full_ ? ZOOM_AUTO : ZOOM_SCALE),
did_call_start_loading_(false),
is_autoscroll_(false),
scrollbar_thickness_(-1),
scrollbar_reserved_thickness_(-1),
current_tb_info_(NULL),
current_tb_info_size_(0),
paint_manager_(this, this, true),
delayed_progress_timer_id_(0),
first_paint_(true),
painted_first_page_(false),
show_page_indicator_(false),
document_load_state_(LOAD_STATE_LOADING),
preview_document_load_state_(LOAD_STATE_COMPLETE),
told_browser_about_unsupported_feature_(false),
print_preview_page_count_(0) {
loader_factory_.Initialize(this);
timer_factory_.Initialize(this);
form_factory_.Initialize(this);
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_WHEEL);
RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_KEYBOARD);
RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_TOUCH);
}
Instance::~Instance() {
if (timer_pending_) {
timer_factory_.CancelAll();
timer_pending_ = false;
}
// The engine may try to access this instance during its destruction.
// Make sure this happens early while the instance is still intact.
engine_.reset();
RemovePerInstanceObject(kPPPPdfInterface, this);
}
bool Instance::Init(uint32_t argc, const char* argn[], const char* argv[]) {
// For now, we hide HiDPI support behind a flag.
if (pp::PDF::IsFeatureEnabled(this, PP_PDFFEATURE_HIDPI))
hidpi_enabled_ = true;
printing_enabled_ = pp::PDF::IsFeatureEnabled(this, PP_PDFFEATURE_PRINTING);
if (printing_enabled_) {
CreateToolbar(kPDFToolbarButtons, arraysize(kPDFToolbarButtons));
} else {
CreateToolbar(kPDFNoPrintToolbarButtons,
arraysize(kPDFNoPrintToolbarButtons));
}
CreateProgressBar();
// Load autoscroll anchor image.
autoscroll_anchor_ =
CreateResourceImage(PP_RESOURCEIMAGE_PDF_PAN_SCROLL_ICON);
#ifdef ENABLE_THUMBNAILS
CreateThumbnails();
#endif
const char* url = NULL;
for (uint32_t i = 0; i < argc; ++i) {
if (strcmp(argn[i], "src") == 0) {
url = argv[i];
break;
}
}
if (!url)
return false;
CreatePageIndicator(IsPrintPreviewUrl(url));
if (!full_) {
// For PDFs embedded in a frame, we don't get the data automatically like we
// do for full-frame loads. Start loading the data manually.
LoadUrl(url);
} else {
DCHECK(!did_call_start_loading_);
pp::PDF::DidStartLoading(this);
did_call_start_loading_ = true;
}
ZoomLimitsChanged(kMinZoom, kMaxZoom);
text_input_.reset(new pp::TextInput_Dev(this));
url_ = url;
return engine_->New(url);
}
bool Instance::HandleDocumentLoad(const pp::URLLoader& loader) {
delayed_progress_timer_id_ = ScheduleTimer(kProgressBarId,
kProgressDelayTimeoutMs);
return engine_->HandleDocumentLoad(loader);
}
bool Instance::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;
}
}
// Check if we need to go to autoscroll mode.
if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE &&
(event.GetModifiers() & PP_INPUTEVENT_MODIFIER_MIDDLEBUTTONDOWN)) {
pp::MouseInputEvent mouse_event(event_device_res);
pp::Point pos = mouse_event.GetPosition();
EnableAutoscroll(pos);
UpdateCursor(CalculateAutoscroll(pos));
return true;
} else {
// Quit autoscrolling on any other event.
DisableAutoscroll();
}
#ifdef ENABLE_THUMBNAILS
if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSELEAVE)
thumbnails_.SlideOut();
if (thumbnails_.HandleEvent(event_device_res))
return true;
#endif
if (toolbar_->HandleEvent(event_device_res))
return true;
#ifdef ENABLE_THUMBNAILS
if (v_scrollbar_.get() && event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE) {
pp::MouseInputEvent mouse_event(event);
pp::Point pt = mouse_event.GetPosition();
pp::Rect v_scrollbar_rc;
v_scrollbar_->GetLocation(&v_scrollbar_rc);
// There is a bug (https://bugs.webkit.org/show_bug.cgi?id=45208)
// in the webkit that makes event.u.mouse.button
// equal to PP_INPUTEVENT_MOUSEBUTTON_LEFT, even when no button is pressed.
// To work around this issue we use modifier for now, and will switch
// to button once the bug is fixed and webkit got merged back to our tree.
if (v_scrollbar_rc.Contains(pt) &&
(event.GetModifiers() & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN)) {
thumbnails_.SlideIn();
}
// When scrollbar is in the scrolling mode we should display thumbnails
// even the mouse is outside the thumbnail and scrollbar areas.
// If mouse is outside plugin area, we are still getting mouse move events
// while scrolling. See bug description for details:
// http://code.google.com/p/chromium/issues/detail?id=56444
if (!v_scrollbar_rc.Contains(pt) && thumbnails_.visible() &&
!(event.GetModifiers() & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN) &&
!thumbnails_.rect().Contains(pt)) {
thumbnails_.SlideOut();
}
}
#endif
// Need to pass the event to the engine first, since if we're over an edit
// control we want it to get keyboard events (like space) instead of the
// scrollbar.
// TODO: will have to offset the mouse coordinates once we support bidi and
// there could be scrollbars on the left.
pp::InputEvent offset_event(event_device_res);
bool try_engine_first = true;
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());
if (!engine_->IsSelecting()) {
if (!IsOverlayScrollbar() &&
!available_area_.Contains(mouse_event.GetPosition())) {
try_engine_first = false;
} else if (IsOverlayScrollbar()) {
pp::Rect temp;
if ((v_scrollbar_.get() && v_scrollbar_->GetLocation(&temp) &&
temp.Contains(mouse_event_dip.GetPosition())) ||
(h_scrollbar_.get() && h_scrollbar_->GetLocation(&temp) &&
temp.Contains(mouse_event_dip.GetPosition()))) {
try_engine_first = false;
}
}
}
break;
}
default:
break;
}
if (try_engine_first && engine_->HandleEvent(offset_event))
return true;
// Left/Right arrows should scroll to the beginning of the Prev/Next page if
// there is no horizontal scroll bar.
// If fit-to-height, PgDown/PgUp should scroll to the beginning of the
// Prev/Next page. Spacebar / shift+spacebar should do the same.
if (v_scrollbar_.get() && event.GetType() == PP_INPUTEVENT_TYPE_KEYDOWN) {
pp::KeyboardInputEvent keyboard_event(event);
bool no_h_scrollbar = !h_scrollbar_.get();
uint32_t key_code = keyboard_event.GetKeyCode();
bool page_down = no_h_scrollbar && key_code == ui::VKEY_RIGHT;
bool page_up = no_h_scrollbar && key_code == ui::VKEY_LEFT;
if (zoom_mode_ == ZOOM_FIT_TO_PAGE) {
bool has_shift =
keyboard_event.GetModifiers() & PP_INPUTEVENT_MODIFIER_SHIFTKEY;
bool key_is_space = key_code == ui::VKEY_SPACE;
page_down |= key_is_space || key_code == ui::VKEY_NEXT;
page_up |= (key_is_space && has_shift) || (key_code == ui::VKEY_PRIOR);
}
if (page_down) {
int page = engine_->GetFirstVisiblePage();
// Engine calculates visible page including delimiter to the page size.
// We need to check here if the page itself is completely out of view and
// scroll to the next one in that case.
if (engine_->GetPageRect(page).bottom() * zoom_ <=
v_scrollbar_->GetValue())
page++;
ScrollToPage(page + 1);
UpdateCursor(PP_CURSORTYPE_POINTER);
return true;
} else if (page_up) {
int page = engine_->GetFirstVisiblePage();
if (engine_->GetPageRect(page).y() * zoom_ >= v_scrollbar_->GetValue())
page--;
ScrollToPage(page);
UpdateCursor(PP_CURSORTYPE_POINTER);
return true;
}
}
if (v_scrollbar_.get() && v_scrollbar_->HandleEvent(event)) {
UpdateCursor(PP_CURSORTYPE_POINTER);
return true;
}
if (h_scrollbar_.get() && h_scrollbar_->HandleEvent(event)) {
UpdateCursor(PP_CURSORTYPE_POINTER);
return true;
}
if (timer_pending_ &&
(event.GetType() == PP_INPUTEVENT_TYPE_MOUSEUP ||
event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE)) {
timer_factory_.CancelAll();
timer_pending_ = false;
} else if (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEMOVE &&
engine_->IsSelecting()) {
bool set_timer = false;
pp::MouseInputEvent mouse_event(event);
if (v_scrollbar_.get() &&
(mouse_event.GetPosition().y() <= 0 ||
mouse_event.GetPosition().y() >= (plugin_dip_size_.height() - 1))) {
v_scrollbar_->ScrollBy(
PP_SCROLLBY_LINE, mouse_event.GetPosition().y() >= 0 ? 1: -1);
set_timer = true;
}
if (h_scrollbar_.get() &&
(mouse_event.GetPosition().x() <= 0 ||
mouse_event.GetPosition().x() >= (plugin_dip_size_.width() - 1))) {
h_scrollbar_->ScrollBy(PP_SCROLLBY_LINE,
mouse_event.GetPosition().x() >= 0 ? 1: -1);
set_timer = true;
}
if (set_timer) {
last_mouse_event_ = pp::MouseInputEvent(event);
pp::CompletionCallback callback =
timer_factory_.NewCallback(&Instance::OnTimerFired);
pp::Module::Get()->core()->CallOnMainThread(kDragTimerMs, callback);
timer_pending_ = true;
}
}
if (event.GetType() == PP_INPUTEVENT_TYPE_KEYDOWN &&
event.GetModifiers() & kDefaultKeyModifier) {
pp::KeyboardInputEvent keyboard_event(event);
switch (keyboard_event.GetKeyCode()) {
case 'A':
engine_->SelectAll();
return true;
}
}
// Return true for unhandled clicks so the plugin takes focus.
return (event.GetType() == PP_INPUTEVENT_TYPE_MOUSEDOWN);
}
void Instance::DidChangeView(const pp::View& view) {
pp::Rect view_rect(view.GetRect());
float device_scale = 1.0f;
float old_device_scale = device_scale_;
if (hidpi_enabled_)
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_)
return; // We don't care about the position, only the size.
image_data_ = pp::ImageData();
device_scale_ = device_scale;
plugin_dip_size_ = view_rect.size();
plugin_size_ = view_device_size;
paint_manager_.SetSize(view_device_size, device_scale_);
image_data_ = pp::ImageData(this,
PP_IMAGEDATAFORMAT_BGRA_PREMUL,
plugin_size_,
false);
if (image_data_.is_null()) {
DCHECK(plugin_size_.IsEmpty());
return;
}
// View dimensions changed, disable autoscroll (if it was enabled).
DisableAutoscroll();
OnGeometryChanged(zoom_, old_device_scale);
}
pp::Var Instance::GetInstanceObject() {
if (instance_object_.is_undefined()) {
PDFScriptableObject* object = new PDFScriptableObject(this);
// The pp::Var takes ownership of object here.
instance_object_ = pp::VarPrivate(this, object);
}
return instance_object_;
}
pp::Var Instance::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);
}
pp::Var Instance::GetSelectedText(bool html) {
if (html || !engine_->HasPermission(PDFEngine::PERMISSION_COPY))
return pp::Var();
return engine_->GetSelectedText();
}
void Instance::InvalidateWidget(pp::Widget_Dev widget,
const pp::Rect& dirty_rect) {
if (v_scrollbar_.get() && *v_scrollbar_ == widget) {
if (!image_data_.is_null())
v_scrollbar_->Paint(dirty_rect.pp_rect(), &image_data_);
} else if (h_scrollbar_.get() && *h_scrollbar_ == widget) {
if (!image_data_.is_null())
h_scrollbar_->Paint(dirty_rect.pp_rect(), &image_data_);
} else {
// Possible to hit this condition since sometimes the scrollbar codes posts
// a task to do something later, and we could have deleted our reference in
// the meantime.
return;
}
pp::Rect dirty_rect_scaled = dirty_rect;
ScaleRect(device_scale_, &dirty_rect_scaled);
paint_manager_.InvalidateRect(dirty_rect_scaled);
}
void Instance::ScrollbarValueChanged(pp::Scrollbar_Dev scrollbar,
uint32_t value) {
value = GetScaled(value);
if (v_scrollbar_.get() && *v_scrollbar_ == scrollbar) {
engine_->ScrolledToYPosition(value);
pp::Rect rc;
v_scrollbar_->GetLocation(&rc);
int32 doc_height = GetDocumentPixelHeight();
doc_height -= GetScaled(rc.height());
#ifdef ENABLE_THUMBNAILS
if (thumbnails_.visible()) {
thumbnails_.SetPosition(value, doc_height, true);
}
#endif
pp::Point origin(
plugin_size_.width() - page_indicator_.rect().width() -
GetScaled(GetScrollbarReservedThickness()),
page_indicator_.GetYPosition(value, doc_height, plugin_size_.height()));
page_indicator_.MoveTo(origin, page_indicator_.visible());
} else if (h_scrollbar_.get() && *h_scrollbar_ == scrollbar) {
engine_->ScrolledToXPosition(value);
}
}
void Instance::ScrollbarOverlayChanged(pp::Scrollbar_Dev scrollbar,
bool overlay) {
scrollbar_reserved_thickness_ = overlay ? 0 : scrollbar_thickness_;
OnGeometryChanged(zoom_, device_scale_);
}
uint32_t Instance::QuerySupportedPrintOutputFormats() {
return engine_->QuerySupportedPrintOutputFormats();
}
int32_t Instance::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 Instance::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 Instance::PrintEnd() {
if (print_settings_.print_pages_called_)
UserMetricsRecordAction("PDF.PrintPage");
print_settings_.Clear();
engine_->PrintEnd();
}
bool Instance::IsPrintScalingDisabled() {
return !engine_->GetPrintScaling();
}
bool Instance::StartFind(const std::string& text, bool case_sensitive) {
engine_->StartFind(text.c_str(), case_sensitive);
return true;
}
void Instance::SelectFindResult(bool forward) {
engine_->SelectFindResult(forward);
}
void Instance::StopFind() {
engine_->StopFind();
}
void Instance::Zoom(double scale, bool text_only) {
UserMetricsRecordAction("PDF.ZoomFromBrowser");
SetZoom(ZOOM_SCALE, scale);
}
void Instance::ZoomChanged(double factor) {
if (full_)
Zoom_Dev::ZoomChanged(factor);
}
void Instance::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(), plugin_size_);
FillRect(rect, kBackgroundColor);
ready->push_back(PaintManager::ReadyRect(rect, image_data_, true));
*pending = paint_rects;
return;
}
engine_->PrePaint();
for (size_t i = 0; i < paint_rects.size(); i++) {
// Intersect with plugin area since there could be pending invalidates from
// when the plugin area was larger.
pp::Rect rect =
paint_rects[i].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 (size_t j = 0; j < pdf_ready.size(); ++j) {
pdf_ready[j].Offset(available_area_.point());
ready->push_back(
PaintManager::ReadyRect(pdf_ready[j], image_data_, false));
}
for (size_t j = 0; j < pdf_pending.size(); ++j) {
pdf_pending[j].Offset(available_area_.point());
pending->push_back(pdf_pending[j]);
}
}
for (size_t j = 0; j < background_parts_.size(); ++j) {
pp::Rect intersection = background_parts_[j].location.Intersect(rect);
if (!intersection.IsEmpty()) {
FillRect(intersection, background_parts_[j].color);
ready->push_back(
PaintManager::ReadyRect(intersection, image_data_, false));
}
}
if (document_load_state_ == LOAD_STATE_FAILED) {
pp::Point top_center;
top_center.set_x(plugin_size_.width() / 2);
top_center.set_y(plugin_size_.height() / 2);
DrawText(top_center, PP_RESOURCESTRING_PDFLOAD_FAILED);
}
#ifdef ENABLE_THUMBNAILS
thumbnails_.Paint(&image_data_, rect);
#endif
}
engine_->PostPaint();
// Must paint scrollbars after the background parts, in case we have an
// overlay scrollbar that's over the background. We also do this in a separate
// loop because the scrollbar painting logic uses the signal of whether there
// are pending paints or not to figure out if it should draw right away or
// not.
for (size_t i = 0; i < paint_rects.size(); i++) {
PaintIfWidgetIntersects(h_scrollbar_.get(), paint_rects[i], ready, pending);
PaintIfWidgetIntersects(v_scrollbar_.get(), paint_rects[i], ready, pending);
}
if (progress_bar_.visible())
PaintOverlayControl(&progress_bar_, &image_data_, ready);
if (page_indicator_.visible())
PaintOverlayControl(&page_indicator_, &image_data_, ready);
if (toolbar_->current_transparency() != kTransparentAlpha)
PaintOverlayControl(toolbar_.get(), &image_data_, ready);
// Paint autoscroll anchor if needed.
if (is_autoscroll_) {
size_t limit = ready->size();
for (size_t i = 0; i < limit; i++) {
pp::Rect anchor_rect = autoscroll_rect_.Intersect((*ready)[i].rect);
if (!anchor_rect.IsEmpty()) {
pp::Rect draw_rc = pp::Rect(
pp::Point(anchor_rect.x() - autoscroll_rect_.x(),
anchor_rect.y() - autoscroll_rect_.y()),
anchor_rect.size());
// Paint autoscroll anchor.
AlphaBlend(autoscroll_anchor_, draw_rc,
&image_data_, anchor_rect.point(), kOpaqueAlpha);
}
}
}
}
void Instance::PaintOverlayControl(
Control* ctrl,
pp::ImageData* image_data,
std::vector<PaintManager::ReadyRect>* ready) {
// Make sure that we only paint overlay controls over an area that's ready,
// i.e. not pending. Otherwise we'll mark the control rect as ready and
// it'll overwrite the pdf region.
std::list<pp::Rect> ctrl_rects;
for (size_t i = 0; i < ready->size(); i++) {
pp::Rect rc = ctrl->rect().Intersect((*ready)[i].rect);
if (!rc.IsEmpty())
ctrl_rects.push_back(rc);
}
if (!ctrl_rects.empty()) {
ctrl->PaintMultipleRects(image_data, ctrl_rects);
std::list<pp::Rect>::iterator iter;
for (iter = ctrl_rects.begin(); iter != ctrl_rects.end(); ++iter) {
ready->push_back(PaintManager::ReadyRect(*iter, *image_data, false));
}
}
}
void Instance::DidOpen(int32_t result) {
if (result == PP_OK) {
engine_->HandleDocumentLoad(embed_loader_);
} else if (result != PP_ERROR_ABORTED) { // Can happen in tests.
NOTREACHED();
}
}
void Instance::DidOpenPreview(int32_t result) {
if (result == PP_OK) {
preview_engine_.reset(PDFEngine::Create(new PreviewModeClient(this)));
preview_engine_->HandleDocumentLoad(embed_preview_loader_);
} else {
NOTREACHED();
}
}
void Instance::PaintIfWidgetIntersects(
pp::Widget_Dev* widget,
const pp::Rect& rect,
std::vector<PaintManager::ReadyRect>* ready,
std::vector<pp::Rect>* pending) {
if (!widget)
return;
pp::Rect location;
if (!widget->GetLocation(&location))
return;
ScaleRect(device_scale_, &location);
location = location.Intersect(rect);
if (location.IsEmpty())
return;
if (IsOverlayScrollbar()) {
// If we're using overlay scrollbars, and there are pending paints under the
// scrollbar, don't update the scrollbar instantly. While it would be nice,
// we would need to double buffer the plugin area in order to make this
// work. This is because we'd need to always have a copy of what the pdf
// under the scrollbar looks like, and additionally we couldn't paint the
// pdf under the scrollbar if it's ready until we got the preceding flush.
// So in practice, it would make painting slower and introduce extra buffer
// copies for the general case.
for (size_t i = 0; i < pending->size(); ++i) {
if ((*pending)[i].Intersects(location))
return;
}
// Even if none of the pending paints are under the scrollbar, we never want
// to paint it if it's over the pdf if there are other pending paints.
// Otherwise different parts of the pdf plugin would display at different
// scroll offsets.
if (!pending->empty() && available_area_.Intersects(rect)) {
pending->push_back(location);
return;
}
}
pp::Rect location_dip = location;
ScaleRect(1.0f / device_scale_, &location_dip);
DCHECK(!image_data_.is_null());
widget->Paint(location_dip, &image_data_);
ready->push_back(PaintManager::ReadyRect(location, image_data_, true));
}
void Instance::OnTimerFired(int32_t) {
HandleInputEvent(last_mouse_event_);
}
void Instance::OnClientTimerFired(int32_t id) {
engine_->OnCallback(id);
}
void Instance::OnControlTimerFired(int32_t,
const uint32& control_id,
const uint32& timer_id) {
if (control_id == toolbar_->id()) {
toolbar_->OnTimerFired(timer_id);
} else if (control_id == progress_bar_.id()) {
if (timer_id == delayed_progress_timer_id_) {
if (document_load_state_ == LOAD_STATE_LOADING &&
!progress_bar_.visible()) {
progress_bar_.Fade(true, kProgressFadeTimeoutMs);
}
delayed_progress_timer_id_ = 0;
} else {
progress_bar_.OnTimerFired(timer_id);
}
} else if (control_id == kAutoScrollId) {
if (is_autoscroll_) {
if (autoscroll_x_ != 0 && h_scrollbar_.get()) {
h_scrollbar_->ScrollBy(PP_SCROLLBY_PIXEL, autoscroll_x_);
}
if (autoscroll_y_ != 0 && v_scrollbar_.get()) {
v_scrollbar_->ScrollBy(PP_SCROLLBY_PIXEL, autoscroll_y_);
}
// Reschedule timer.
ScheduleTimer(kAutoScrollId, kAutoScrollTimeoutMs);