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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.
#ifndef PDF_OUT_OF_PROCESS_INSTANCE_H_
#define PDF_OUT_OF_PROCESS_INSTANCE_H_
#include <queue>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include "base/memory/scoped_ptr.h"
#include "pdf/paint_manager.h"
#include "pdf/pdf_engine.h"
#include "pdf/preview_mode_client.h"
#include "ppapi/c/private/ppb_pdf.h"
#include "ppapi/cpp/dev/printing_dev.h"
#include "ppapi/cpp/dev/scriptable_object_deprecated.h"
#include "ppapi/cpp/dev/selection_dev.h"
#include "ppapi/cpp/graphics_2d.h"
#include "ppapi/cpp/image_data.h"
#include "ppapi/cpp/input_event.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/private/find_private.h"
#include "ppapi/cpp/private/uma_private.h"
#include "ppapi/cpp/url_loader.h"
#include "ppapi/utility/completion_callback_factory.h"
namespace pp {
class TextInput_Dev;
}
namespace chrome_pdf {
class OutOfProcessInstance : public pp::Instance,
public pp::Find_Private,
public pp::Printing_Dev,
public pp::Selection_Dev,
public PaintManager::Client,
public PDFEngine::Client,
public PreviewModeClient::Client {
public:
explicit OutOfProcessInstance(PP_Instance instance);
virtual ~OutOfProcessInstance();
// pp::Instance implementation.
virtual bool Init(uint32_t argc,
const char* argn[],
const char* argv[]) override;
virtual void HandleMessage(const pp::Var& message) override;
virtual bool HandleInputEvent(const pp::InputEvent& event) override;
virtual void DidChangeView(const pp::View& view) override;
// pp::Find_Private implementation.
virtual bool StartFind(const std::string& text, bool case_sensitive) override;
virtual void SelectFindResult(bool forward) override;
virtual void StopFind() override;
// pp::PaintManager::Client implementation.
virtual void OnPaint(const std::vector<pp::Rect>& paint_rects,
std::vector<PaintManager::ReadyRect>* ready,
std::vector<pp::Rect>* pending) override;
// pp::Printing_Dev implementation.
virtual uint32_t QuerySupportedPrintOutputFormats() override;
virtual int32_t PrintBegin(
const PP_PrintSettings_Dev& print_settings) override;
virtual pp::Resource PrintPages(
const PP_PrintPageNumberRange_Dev* page_ranges,
uint32_t page_range_count) override;
virtual void PrintEnd() override;
virtual bool IsPrintScalingDisabled() override;
// pp::Private implementation.
virtual pp::Var GetLinkAtPosition(const pp::Point& point);
// PPP_Selection_Dev implementation.
virtual pp::Var GetSelectedText(bool html) override;
void FlushCallback(int32_t result);
void DidOpen(int32_t result);
void DidOpenPreview(int32_t result);
// Called when the timer is fired.
void OnClientTimerFired(int32_t id);
// Called to print without re-entrancy issues.
void OnPrint(int32_t);
// PDFEngine::Client implementation.
virtual void DocumentSizeUpdated(const pp::Size& size);
virtual void Invalidate(const pp::Rect& rect);
virtual void Scroll(const pp::Point& point);
virtual void ScrollToX(int position);
virtual void ScrollToY(int position);
virtual void ScrollToPage(int page);
virtual void NavigateTo(const std::string& url, bool open_in_new_tab);
virtual void UpdateCursor(PP_CursorType_Dev cursor);
virtual void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks);
virtual void NotifyNumberOfFindResultsChanged(int total, bool final_result);
virtual void NotifySelectedFindResultChanged(int current_find_index);
virtual void GetDocumentPassword(
pp::CompletionCallbackWithOutput<pp::Var> callback);
virtual void Alert(const std::string& message);
virtual bool Confirm(const std::string& message);
virtual std::string Prompt(const std::string& question,
const std::string& default_answer);
virtual std::string GetURL();
virtual void Email(const std::string& to,
const std::string& cc,
const std::string& bcc,
const std::string& subject,
const std::string& body);
virtual void Print();
virtual void SubmitForm(const std::string& url,
const void* data,
int length);
virtual std::string ShowFileSelectionDialog();
virtual pp::URLLoader CreateURLLoader();
virtual void ScheduleCallback(int id, int delay_in_ms);
virtual void SearchString(const base::char16* string,
const base::char16* term,
bool case_sensitive,
std::vector<SearchStringResult>* results);
virtual void DocumentPaintOccurred();
virtual void DocumentLoadComplete(int page_count);
virtual void DocumentLoadFailed();
virtual pp::Instance* GetPluginInstance();
virtual void DocumentHasUnsupportedFeature(const std::string& feature);
virtual void DocumentLoadProgress(uint32 available, uint32 doc_size);
virtual void FormTextFieldFocusChange(bool in_focus);
virtual bool IsPrintPreview();
// PreviewModeClient::Client implementation.
virtual void PreviewDocumentLoadComplete() override;
virtual void PreviewDocumentLoadFailed() override;
// Helper functions for implementing PPP_PDF.
void RotateClockwise();
void RotateCounterclockwise();
private:
void ResetRecentlySentFindUpdate(int32_t);
// Called whenever the plugin geometry changes to update the location of the
// background parts, and notifies the pdf engine.
void OnGeometryChanged(double old_zoom, float old_device_scale);
// Figures out the location of any background rectangles (i.e. those that
// aren't painted by the PDF engine).
void CalculateBackgroundParts();
// Computes document width/height in device pixels, based on current zoom and
// device scale
int GetDocumentPixelWidth() const;
int GetDocumentPixelHeight() const;
// Draws a rectangle with the specified dimensions and color in our buffer.
void FillRect(const pp::Rect& rect, uint32 color);
void LoadUrl(const std::string& url);
void LoadPreviewUrl(const std::string& url);
void LoadUrlInternal(const std::string& url, pp::URLLoader* loader,
void (OutOfProcessInstance::* method)(int32_t));
// Creates a URL loader and allows it to access all urls, i.e. not just the
// frame's origin.
pp::URLLoader CreateURLLoaderInternal();
// Figure out the initial page to display based on #page=N and #nameddest=foo
// in the |url_|.
// Returns -1 if there is no valid fragment. The returned value is 0-based,
// whereas page=N is 1-based.
int GetInitialPage(const std::string& url);
void FormDidOpen(int32_t result);
std::string GetLocalizedString(PP_ResourceString id);
void UserMetricsRecordAction(const std::string& action);
enum DocumentLoadState {
LOAD_STATE_LOADING,
LOAD_STATE_COMPLETE,
LOAD_STATE_FAILED,
};
// Set new zoom scale.
void SetZoom(double scale);
// Reduces the document to 1 page and appends |print_preview_page_count_|
// blank pages to the document for print preview.
void AppendBlankPrintPreviewPages();
// Process the preview page data information. |src_url| specifies the preview
// page data location. The |src_url| is in the format:
// chrome://print/id/page_number/print.pdf
// |dst_page_index| specifies the blank page index that needs to be replaced
// with the new page data.
void ProcessPreviewPageInfo(const std::string& src_url, int dst_page_index);
// Load the next available preview page into the blank page.
void LoadAvailablePreviewPage();
// Bound the given scroll offset to the document.
pp::Point BoundScrollOffsetToDocument(const pp::Point& scroll_offset);
pp::ImageData image_data_;
// Used when the plugin is embedded in a page and we have to create the loader
// ourself.
pp::CompletionCallbackFactory<OutOfProcessInstance> loader_factory_;
pp::URLLoader embed_loader_;
pp::URLLoader embed_preview_loader_;
PP_CursorType_Dev cursor_; // The current cursor.
pp::CompletionCallbackFactory<OutOfProcessInstance> timer_factory_;
// Size, in pixels, of plugin rectangle.
pp::Size plugin_size_;
// Size, in DIPs, of plugin rectangle.
pp::Size plugin_dip_size_;
// Remaining area, in pixels, to render the pdf in after accounting for
// horizontal centering.
pp::Rect available_area_;
// Size of entire document in pixels (i.e. if each page is 800 pixels high and
// there are 10 pages, the height will be 8000).
pp::Size document_size_;
double zoom_; // Current zoom factor.
float device_scale_; // Current device scale factor.
bool printing_enabled_;
// True if the plugin is full-page.
bool full_;
PaintManager paint_manager_;
struct BackgroundPart {
pp::Rect location;
uint32 color;
};
std::vector<BackgroundPart> background_parts_;
struct PrintSettings {
PrintSettings() {
Clear();
}
void Clear() {
is_printing = false;
print_pages_called_ = false;
memset(&pepper_print_settings, 0, sizeof(pepper_print_settings));
}
// This is set to true when PrintBegin is called and false when PrintEnd is
// called.
bool is_printing;
// To know whether this was an actual print operation, so we don't double
// count UMA logging.
bool print_pages_called_;
PP_PrintSettings_Dev pepper_print_settings;
};
PrintSettings print_settings_;
scoped_ptr<PDFEngine> engine_;
// This engine is used to render the individual preview page data. This is
// used only in print preview mode. This will use |PreviewModeClient|
// interface which has very limited access to the pp::Instance.
scoped_ptr<PDFEngine> preview_engine_;
std::string url_;
// Used for submitting forms.
pp::CompletionCallbackFactory<OutOfProcessInstance> form_factory_;
pp::URLLoader form_loader_;
// Used for printing without re-entrancy issues.
pp::CompletionCallbackFactory<OutOfProcessInstance> print_callback_factory_;
// True if we haven't painted the plugin viewport yet.
bool first_paint_;
DocumentLoadState document_load_state_;
DocumentLoadState preview_document_load_state_;
// A UMA resource for histogram reporting.
pp::UMAPrivate uma_;
// Used so that we only tell the browser once about an unsupported feature, to
// avoid the infobar going up more than once.
bool told_browser_about_unsupported_feature_;
// Keeps track of which unsupported features we reported, so we avoid spamming
// the stats if a feature shows up many times per document.
std::set<std::string> unsupported_features_reported_;
// Number of pages in print preview mode, 0 if not in print preview mode.
int print_preview_page_count_;
std::vector<int> print_preview_page_numbers_;
// Used to manage loaded print preview page information. A |PreviewPageInfo|
// consists of data source url string and the page index in the destination
// document.
typedef std::pair<std::string, int> PreviewPageInfo;
std::queue<PreviewPageInfo> preview_pages_info_;
// Used to signal the browser about focus changes to trigger the OSK.
// TODO(abodenha@chromium.org) Implement full IME support in the plugin.
// http://crbug.com/132565
scoped_ptr<pp::TextInput_Dev> text_input_;
// The last document load progress value sent to the web page.
double last_progress_sent_;
// Whether an update to the number of find results found was sent less than
// |kFindResultCooldownMs| milliseconds ago.
bool recently_sent_find_update_;
// The tickmarks.
std::vector<pp::Rect> tickmarks_;
// Whether the plugin has received a viewport changed message. Nothing should
// be painted until this is received.
bool received_viewport_message_;
// If true, this means we told the RenderView that we're starting a network
// request so that it can start the throbber. We will tell it again once the
// document finishes loading.
bool did_call_start_loading_;
// If this is true, then don't scroll the plugin in response to DidChangeView
// messages. This will be true when the extension page is in the process of
// zooming the plugin so that flickering doesn't occur while zooming.
bool stop_scrolling_;
// The callback for receiving the password from the page.
scoped_ptr<pp::CompletionCallbackWithOutput<pp::Var> > password_callback_;
};
} // namespace chrome_pdf
#endif // PDF_OUT_OF_PROCESS_INSTANCE_H_