blob: 851003b4ab7cdc487cf919a679bddf3bc3e53bac [file] [log] [blame]
// 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 <stdint.h>
#include <string.h>
#include <memory>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include "base/containers/queue.h"
#include "base/macros.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/c/private/ppp_pdf.h"
#include "ppapi/cpp/dev/printing_dev.h"
#include "ppapi/cpp/dev/scriptable_object_deprecated.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 PaintManager::Client,
public PDFEngine::Client,
public PreviewModeClient::Client {
explicit OutOfProcessInstance(PP_Instance instance);
~OutOfProcessInstance() override;
// pp::Instance implementation.
bool Init(uint32_t argc, const char* argn[], const char* argv[]) override;
void HandleMessage(const pp::Var& message) override;
bool HandleInputEvent(const pp::InputEvent& event) override;
void DidChangeView(const pp::View& view) override;
void DidChangeFocus(bool has_focus) override;
// pp::Find_Private implementation.
bool StartFind(const std::string& text, bool case_sensitive) override;
void SelectFindResult(bool forward) override;
void StopFind() override;
// pp::PaintManager::Client implementation.
void OnPaint(const std::vector<pp::Rect>& paint_rects,
std::vector<PaintManager::ReadyRect>* ready,
std::vector<pp::Rect>* pending) override;
// pp::Printing_Dev implementation.
uint32_t QuerySupportedPrintOutputFormats() override;
int32_t PrintBegin(const PP_PrintSettings_Dev& print_settings) override;
pp::Resource PrintPages(const PP_PrintPageNumberRange_Dev* page_ranges,
uint32_t page_range_count) override;
void PrintEnd() override;
bool IsPrintScalingDisabled() override;
// pp::Private implementation.
pp::Var GetLinkAtPosition(const pp::Point& point);
void GetPrintPresetOptionsFromDocument(PP_PdfPrintPresetOptions_Dev* options);
void EnableAccessibility();
void SetCaretPosition(const pp::FloatPoint& position);
void MoveRangeSelectionExtent(const pp::FloatPoint& extent);
void SetSelectionBounds(const pp::FloatPoint& base,
const pp::FloatPoint& extent);
bool CanEditText();
bool HasEditableText();
void ReplaceSelection(const std::string& text);
bool CanUndo();
bool CanRedo();
void Undo();
void Redo();
int32_t PdfPrintBegin(const PP_PrintSettings_Dev* print_settings,
const PP_PdfPrintSettings_Dev* pdf_print_settings);
void FlushCallback(int32_t result);
void DidOpen(int32_t result);
void DidOpenPreview(int32_t result);
// Called to print without re-entrancy issues.
void OnPrint(int32_t);
// PDFEngine::Client implementation.
void DocumentSizeUpdated(const pp::Size& size) override;
void Invalidate(const pp::Rect& rect) override;
void DidScroll(const pp::Point& point) override;
void ScrollToX(int x_in_screen_coords) override;
void ScrollToY(int y_in_screen_coords, bool compensate_for_toolbar) override;
void ScrollBy(const pp::Point& point) override;
void ScrollToPage(int page) override;
void NavigateTo(const std::string& url,
WindowOpenDisposition disposition) override;
void UpdateCursor(PP_CursorType_Dev cursor) override;
void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks) override;
void NotifyNumberOfFindResultsChanged(int total, bool final_result) override;
void NotifySelectedFindResultChanged(int current_find_index) override;
void NotifyPageBecameVisible(
const PDFEngine::PageFeatures* page_features) override;
void GetDocumentPassword(
pp::CompletionCallbackWithOutput<pp::Var> callback) override;
void Beep() override;
void Alert(const std::string& message) override;
bool Confirm(const std::string& message) override;
std::string Prompt(const std::string& question,
const std::string& default_answer) override;
std::string GetURL() override;
void Email(const std::string& to,
const std::string& cc,
const std::string& bcc,
const std::string& subject,
const std::string& body) override;
void Print() override;
void SubmitForm(const std::string& url,
const void* data,
int length) override;
pp::URLLoader CreateURLLoader() override;
std::vector<SearchStringResult> SearchString(const base::char16* string,
const base::char16* term,
bool case_sensitive) override;
void DocumentPaintOccurred() override;
void DocumentLoadComplete(
const PDFEngine::DocumentFeatures& document_features,
uint32_t file_size) override;
void DocumentLoadFailed() override;
void FontSubstituted() override;
pp::Instance* GetPluginInstance() override;
void DocumentHasUnsupportedFeature(const std::string& feature) override;
void DocumentLoadProgress(uint32_t available, uint32_t doc_size) override;
void FormTextFieldFocusChange(bool in_focus) override;
bool IsPrintPreview() override;
uint32_t GetBackgroundColor() override;
void CancelBrowserDownload() override;
void IsSelectingChanged(bool is_selecting) override;
void SelectionChanged(const pp::Rect& left, const pp::Rect& right) override;
void IsEditModeChanged(bool is_edit_mode) override;
float GetToolbarHeightInScreenCoords() override;
// PreviewModeClient::Client implementation.
void PreviewDocumentLoadComplete() override;
void PreviewDocumentLoadFailed() override;
// Helper functions for implementing PPP_PDF.
void RotateClockwise();
void RotateCounterclockwise();
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_t color);
void LoadUrl(const std::string& url, bool is_print_preview);
// Creates a URL loader and allows it to access all urls, i.e. not just the
// frame's origin.
pp::URLLoader CreateURLLoaderInternal();
bool ShouldSaveEdits() const;
void SaveToFile(const std::string& token);
void SaveToBuffer(const std::string& token);
void ConsumeSaveToken(const std::string& token);
void FormDidOpen(int32_t result);
void UserMetricsRecordAction(const std::string& action);
// Start loading accessibility information.
void LoadAccessibility();
// Send accessibility information about the given page index.
void SendNextAccessibilityPage(int32_t page_index);
// Send the accessibility information about the current viewport. This is
// done once when accessibility is first loaded and again when the geometry
// changes.
void SendAccessibilityViewportInfo();
enum DocumentLoadState {
// Set new zoom scale.
void SetZoom(double scale);
// Reduces the document to 1 page and appends |print_preview_page_count_| - 1
// 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
// |dest_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 dest_page_index);
// Load the next available preview page into the blank page.
void LoadAvailablePreviewPage();
// Called after a preview page has loaded or failed to load.
void LoadNextPreviewPage();
// Send a notification that the print preview has loaded.
void SendPrintPreviewLoadedNotification();
// Bound the given scroll offset to the document.
pp::FloatPoint BoundScrollOffsetToDocument(
const pp::FloatPoint& scroll_offset);
// Wrappers for |uma_| so histogram reporting only occurs when the PDF Viewer
// is not being used for print preview.
void HistogramCustomCounts(const std::string& name,
int32_t sample,
int32_t min,
int32_t max,
uint32_t bucket_count);
void HistogramEnumeration(const std::string& name,
int32_t sample,
int32_t boundary_value);
// Wrapper for |uma_| so PrintPreview.PdfAction histogram reporting only
// occurs when the PDF Viewer is being used inside print preview.
void PrintPreviewHistogramEnumeration(int32_t sample);
pp::ImageData image_data_;
// Used when the plugin is embedded in a page and we have to create the loader
// ourself.
pp::URLLoader embed_loader_;
pp::URLLoader embed_preview_loader_;
PP_CursorType_Dev cursor_; // The current cursor.
// 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_;
// The scroll offset in CSS pixels.
pp::Point scroll_offset_;
// Enumeration of pinch states.
// This should match PinchPhase enum in
// chrome/browser/resources/pdf/viewport.js
enum PinchPhase {
// Current zoom factor.
double zoom_;
// True if we request a new bitmap rendering.
bool needs_reraster_;
// The scroll position for the last raster, before any transformations are
// applied.
pp::FloatPoint scroll_offset_at_last_raster_;
// True if last bitmap was smaller than screen.
bool last_bitmap_smaller_;
// Current device scale factor. Multiply by |device_scale_| to convert from
// viewport to screen coordinates. Divide by |device_scale_| to convert from
// screen to viewport coordinates.
float device_scale_;
// True if the plugin is full-page.
bool full_;
PaintManager paint_manager_;
struct BackgroundPart {
pp::Rect location;
uint32_t color;
std::vector<BackgroundPart> background_parts_;
struct PrintSettings {
PrintSettings() { Clear(); }
void Clear();
// This is set to true when PdfPrintBegin() 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;
// Generic print settings.
PP_PrintSettings_Dev pepper_print_settings;
// PDF-specific print settings.
PP_PdfPrintSettings_Dev pdf_print_settings;
PrintSettings print_settings_;
std::unique_ptr<PDFEngine> engine_;
// The PreviewModeClient used for print preview. Will be passed to
// |preview_engine_|.
std::unique_ptr<PreviewModeClient> preview_client_;
// 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.
std::unique_ptr<PDFEngine> preview_engine_;
std::string url_;
// Used for submitting forms.
pp::URLLoader form_loader_;
pp::CompletionCallbackFactory<OutOfProcessInstance> callback_factory_;
// The callback for receiving the password from the page.
std::unique_ptr<pp::CompletionCallbackWithOutput<pp::Var>> password_callback_;
// 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_;
// Keeps track of whether font substitution has been reported, so we avoid
// spamming the stats if a document requested multiple substitutes.
bool font_substitution_reported_;
// Number of pages in print preview mode for non-PDF source, 0 if print
// previewing a PDF, and -1 if not in print preview mode.
int print_preview_page_count_;
// Number of pages loaded in print preview mode for non-PDF source. Always
// less than or equal to |print_preview_page_count_|.
int print_preview_loaded_page_count_;
// Used to manage loaded print preview page information. A |PreviewPageInfo|
// consists of data source URL string and the page index in the destination
// document.
// The URL string embeds a page number that can be found with
// ExtractPrintPreviewPageIndex(). This page number is always greater than 0.
// The page index is always in the range of [0, print_preview_page_count_).
using PreviewPageInfo = std::pair<std::string, int>;
base::queue<PreviewPageInfo> preview_pages_info_;
// Used to signal the browser about focus changes to trigger the OSK.
// TODO( Implement full IME support in the plugin.
std::unique_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 background color of the PDF viewer.
uint32_t background_color_;
// The blank space above the first page of the document reserved for the
// toolbar.
int top_toolbar_height_in_viewport_coords_;
// Whether each page had its features processed.
std::vector<bool> page_is_processed_;
// Annotation types that were already counted for this document.
std::set<int> annotation_types_counted_;
bool edit_mode_ = false;
// The current state of accessibility: either off, enabled but waiting
// for the document to load, or fully loaded.
enum AccessibilityState {
ACCESSIBILITY_STATE_PENDING, // Enabled but waiting for doc to load.
} accessibility_state_;
// True if the plugin is loaded in print preview, otherwise false.
bool is_print_preview_;
// Used for UMA. Do not delete entries, and keep in sync with histograms.xml.
enum PdfActionBuckets {
// Array indicating what events have been recorded for print preview metrics.
bool preview_action_recorded_[PDFACTION_BUCKET_BOUNDARY];
} // namespace chrome_pdf