| // 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_PDFIUM_PDFIUM_ENGINE_H_ |
| #define PDF_PDFIUM_PDFIUM_ENGINE_H_ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include <map> |
| #include <memory> |
| #include <string> |
| #include <utility> |
| #include <vector> |
| |
| #include "base/macros.h" |
| #include "base/optional.h" |
| #include "base/time/time.h" |
| #include "pdf/document_loader.h" |
| #include "pdf/pdf_engine.h" |
| #include "pdf/pdfium/pdfium_page.h" |
| #include "pdf/pdfium/pdfium_range.h" |
| #include "ppapi/cpp/completion_callback.h" |
| #include "ppapi/cpp/dev/buffer_dev.h" |
| #include "ppapi/cpp/image_data.h" |
| #include "ppapi/cpp/point.h" |
| #include "ppapi/cpp/var_array.h" |
| #include "third_party/pdfium/public/fpdf_dataavail.h" |
| #include "third_party/pdfium/public/fpdf_formfill.h" |
| #include "third_party/pdfium/public/fpdf_progressive.h" |
| #include "third_party/pdfium/public/fpdfview.h" |
| |
| namespace pp { |
| class KeyboardInputEvent; |
| class MouseInputEvent; |
| class VarDictionary; |
| } |
| |
| namespace chrome_pdf { |
| |
| class ShadowMatrix; |
| |
| class PDFiumEngine : public PDFEngine, |
| public DocumentLoader::Client, |
| public FPDF_FORMFILLINFO, |
| public IPDF_JSPLATFORM, |
| public IFSDK_PAUSE { |
| public: |
| explicit PDFiumEngine(PDFEngine::Client* client); |
| ~PDFiumEngine() override; |
| |
| // PDFEngine implementation. |
| bool New(const char* url, const char* headers) override; |
| void PageOffsetUpdated(const pp::Point& page_offset) override; |
| void PluginSizeUpdated(const pp::Size& size) override; |
| void ScrolledToXPosition(int position) override; |
| void ScrolledToYPosition(int position) override; |
| void PrePaint() override; |
| void Paint(const pp::Rect& rect, |
| pp::ImageData* image_data, |
| std::vector<pp::Rect>* ready, |
| std::vector<pp::Rect>* pending) override; |
| void PostPaint() override; |
| bool HandleDocumentLoad(const pp::URLLoader& loader) override; |
| bool HandleEvent(const pp::InputEvent& event) override; |
| uint32_t QuerySupportedPrintOutputFormats() override; |
| void PrintBegin() override; |
| pp::Resource PrintPages(const PP_PrintPageNumberRange_Dev* page_ranges, |
| uint32_t page_range_count, |
| const PP_PrintSettings_Dev& print_settings) override; |
| void PrintEnd() override; |
| void StartFind(const std::string& text, bool case_sensitive) override; |
| bool SelectFindResult(bool forward) override; |
| void StopFind() override; |
| void ZoomUpdated(double new_zoom_level) override; |
| void RotateClockwise() override; |
| void RotateCounterclockwise() override; |
| std::string GetSelectedText() override; |
| std::string GetLinkAtPosition(const pp::Point& point) override; |
| bool HasPermission(DocumentPermission permission) const override; |
| void SelectAll() override; |
| int GetNumberOfPages() override; |
| pp::VarArray GetBookmarks() override; |
| int GetNamedDestinationPage(const std::string& destination) override; |
| int GetMostVisiblePage() override; |
| pp::Rect GetPageRect(int index) override; |
| pp::Rect GetPageBoundsRect(int index) override; |
| pp::Rect GetPageContentsRect(int index) override; |
| pp::Rect GetPageScreenRect(int page_index) const override; |
| int GetVerticalScrollbarYPosition() override; |
| void SetGrayscale(bool grayscale) override; |
| void OnCallback(int id) override; |
| int GetCharCount(int page_index) override; |
| pp::FloatRect GetCharBounds(int page_index, int char_index) override; |
| uint32_t GetCharUnicode(int page_index, int char_index) override; |
| void GetTextRunInfo(int page_index, |
| int start_char_index, |
| uint32_t* out_len, |
| double* out_font_size, |
| pp::FloatRect* out_bounds) override; |
| bool GetPrintScaling() override; |
| int GetCopiesToPrint() override; |
| int GetDuplexType() override; |
| bool GetPageSizeAndUniformity(pp::Size* size) override; |
| void AppendBlankPages(int num_pages) override; |
| void AppendPage(PDFEngine* engine, int index) override; |
| #if defined(PDF_ENABLE_XFA) |
| void SetScrollPosition(const pp::Point& position) override; |
| #endif |
| std::string GetMetadata(const std::string& key) override; |
| |
| // DocumentLoader::Client implementation. |
| pp::Instance* GetPluginInstance() override; |
| std::unique_ptr<URLLoaderWrapper> CreateURLLoader() override; |
| void OnPendingRequestComplete() override; |
| void OnNewDataAvailable() override; |
| void OnDocumentComplete() override; |
| void OnDocumentCanceled() override; |
| void CancelBrowserDownload() override; |
| |
| void UnsupportedFeature(int type); |
| void FontSubstituted(); |
| |
| std::string current_find_text() const { return current_find_text_; } |
| |
| FPDF_DOCUMENT doc() { return doc_; } |
| FPDF_FORMHANDLE form() { return form_; } |
| |
| private: |
| // This helper class is used to detect the difference in selection between |
| // construction and destruction. At destruction, it invalidates all the |
| // parts that are newly selected, along with all the parts that used to be |
| // selected but are not anymore. |
| class SelectionChangeInvalidator { |
| public: |
| explicit SelectionChangeInvalidator(PDFiumEngine* engine); |
| ~SelectionChangeInvalidator(); |
| private: |
| // Sets the given container to the all the currently visible selection |
| // rectangles, in screen coordinates. |
| void GetVisibleSelectionsScreenRects(std::vector<pp::Rect>* rects); |
| |
| PDFiumEngine* engine_; |
| // Screen rectangles that were selected on construction. |
| std::vector<pp::Rect> old_selections_; |
| // The origin at the time this object was constructed. |
| pp::Point previous_origin_; |
| }; |
| |
| // Used to store mouse down state to handle it in other mouse event handlers. |
| class MouseDownState { |
| public: |
| MouseDownState(const PDFiumPage::Area& area, |
| const PDFiumPage::LinkTarget& target); |
| ~MouseDownState(); |
| |
| void Set(const PDFiumPage::Area& area, |
| const PDFiumPage::LinkTarget& target); |
| void Reset(); |
| bool Matches(const PDFiumPage::Area& area, |
| const PDFiumPage::LinkTarget& target) const; |
| |
| private: |
| PDFiumPage::Area area_; |
| PDFiumPage::LinkTarget target_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MouseDownState); |
| }; |
| |
| // Used to store the state of a text search. |
| class FindTextIndex { |
| public: |
| FindTextIndex(); |
| ~FindTextIndex(); |
| |
| bool valid() const { return valid_; } |
| void Invalidate(); |
| |
| size_t GetIndex() const; |
| void SetIndex(size_t index); |
| size_t IncrementIndex(); |
| |
| private: |
| bool valid_; // Whether |index_| is valid or not. |
| size_t index_; // The current search result, 0-based. |
| |
| DISALLOW_COPY_AND_ASSIGN(FindTextIndex); |
| }; |
| |
| friend class SelectionChangeInvalidator; |
| |
| struct FileAvail : public FX_FILEAVAIL { |
| PDFiumEngine* engine; |
| }; |
| |
| struct DownloadHints : public FX_DOWNLOADHINTS { |
| PDFiumEngine* engine; |
| }; |
| |
| // PDFium interface to get block of data. |
| static int GetBlock(void* param, unsigned long position, |
| unsigned char* buffer, unsigned long size); |
| |
| // PDFium interface to check is block of data is available. |
| static FPDF_BOOL IsDataAvail(FX_FILEAVAIL* param, |
| size_t offset, size_t size); |
| |
| // PDFium interface to request download of the block of data. |
| static void AddSegment(FX_DOWNLOADHINTS* param, |
| size_t offset, size_t size); |
| |
| // We finished getting the pdf file, so load it. This will complete |
| // asynchronously (due to password fetching) and may be run multiple times. |
| void LoadDocument(); |
| |
| // Try loading the document. Returns true if the document is successfully |
| // loaded or is already loaded otherwise it will return false. If there is a |
| // password, then |password| is non-empty. If the document could not be loaded |
| // and needs a password, |needs_password| will be set to true. |
| bool TryLoadingDoc(const std::string& password, bool* needs_password); |
| |
| // Asks the user for the document password and then continue loading the |
| // document. |
| void GetPasswordAndLoad(); |
| |
| // Called when the password has been retrieved. |
| void OnGetPasswordComplete(int32_t result, |
| const pp::Var& password); |
| |
| // Continues loading the document when the password has been retrieved, or if |
| // there is no password. If there is no password, then |password| is empty. |
| void ContinueLoadingDocument(const std::string& password); |
| |
| // Finishes loading the document. Recalculate the document size if there were |
| // pages that were not previously available. |
| // Also notifies the client that the document has been loaded. |
| // This should only be called after |doc_| has been loaded and the document is |
| // fully downloaded. |
| // If this has been run once, it will not notify the client again. |
| void FinishLoadingDocument(); |
| |
| // Loads information about the pages in the document and calculate the |
| // document size. |
| void LoadPageInfo(bool reload); |
| |
| // Calculates which pages should be displayed right now. |
| void CalculateVisiblePages(); |
| |
| // Returns true iff the given page index is visible. CalculateVisiblePages |
| // must have been called first. |
| bool IsPageVisible(int index) const; |
| |
| // Internal interface that caches the page index requested by PDFium to get |
| // scrolled to. The cache is to be be used during the interval the PDF |
| // plugin has not finished handling the scroll request. |
| void ScrollToPage(int page); |
| |
| // Checks if a page is now available, and if so marks it as such and returns |
| // true. Otherwise, it will return false and will add the index to the given |
| // array if it's not already there. |
| bool CheckPageAvailable(int index, std::vector<int>* pending); |
| |
| // Helper function to get a given page's size in pixels. This is not part of |
| // PDFiumPage because we might not have that structure when we need this. |
| pp::Size GetPageSize(int index); |
| |
| void GetAllScreenRectsUnion(std::vector<PDFiumRange>* rect_range, |
| const pp::Point& offset_point, |
| std::vector<pp::Rect>* rect_vector); |
| |
| void UpdateTickMarks(); |
| |
| // Called to continue searching so we don't block the main thread. |
| void ContinueFind(int32_t result); |
| |
| // Inserts a find result into find_results_, which is sorted. |
| void AddFindResult(const PDFiumRange& result); |
| |
| // Search a page using PDFium's methods. Doesn't work with unicode. This |
| // function is just kept arount in case PDFium code is fixed. |
| void SearchUsingPDFium(const base::string16& term, |
| bool case_sensitive, |
| bool first_search, |
| int character_to_start_searching_from, |
| int current_page); |
| |
| // Search a page ourself using ICU. |
| void SearchUsingICU(const base::string16& term, |
| bool case_sensitive, |
| bool first_search, |
| int character_to_start_searching_from, |
| int current_page); |
| |
| // Input event handlers. |
| bool OnMouseDown(const pp::MouseInputEvent& event); |
| bool OnMouseUp(const pp::MouseInputEvent& event); |
| bool OnMouseMove(const pp::MouseInputEvent& event); |
| bool OnKeyDown(const pp::KeyboardInputEvent& event); |
| bool OnKeyUp(const pp::KeyboardInputEvent& event); |
| bool OnChar(const pp::KeyboardInputEvent& event); |
| |
| FPDF_DOCUMENT CreateSinglePageRasterPdf( |
| double source_page_width, |
| double source_page_height, |
| const PP_PrintSettings_Dev& print_settings, |
| PDFiumPage* page_to_print); |
| |
| pp::Buffer_Dev PrintPagesAsRasterPDF( |
| const PP_PrintPageNumberRange_Dev* page_ranges, |
| uint32_t page_range_count, |
| const PP_PrintSettings_Dev& print_settings); |
| |
| pp::Buffer_Dev PrintPagesAsPDF(const PP_PrintPageNumberRange_Dev* page_ranges, |
| uint32_t page_range_count, |
| const PP_PrintSettings_Dev& print_settings); |
| |
| pp::Buffer_Dev GetFlattenedPrintData(const FPDF_DOCUMENT& doc); |
| void FitContentsToPrintableAreaIfRequired( |
| const FPDF_DOCUMENT& doc, |
| const PP_PrintSettings_Dev& print_settings); |
| void SaveSelectedFormForPrint(); |
| |
| // Given a mouse event, returns which page and character location it's closest |
| // to. |
| PDFiumPage::Area GetCharIndex(const pp::MouseInputEvent& event, |
| int* page_index, |
| int* char_index, |
| int* form_type, |
| PDFiumPage::LinkTarget* target); |
| PDFiumPage::Area GetCharIndex(const pp::Point& point, |
| int* page_index, |
| int* char_index, |
| int* form_type, |
| PDFiumPage::LinkTarget* target); |
| |
| void OnSingleClick(int page_index, int char_index); |
| void OnMultipleClick(int click_count, int page_index, int char_index); |
| |
| // Starts a progressive paint operation given a rectangle in screen |
| // coordinates. Returns the index in progressive_rects_. |
| int StartPaint(int page_index, const pp::Rect& dirty); |
| |
| // Continues a paint operation that was started earlier. Returns true if the |
| // paint is done, or false if it needs to be continued. |
| bool ContinuePaint(int progressive_index, pp::ImageData* image_data); |
| |
| // Called once PDFium is finished rendering a page so that we draw our |
| // borders, highlighting etc. |
| void FinishPaint(int progressive_index, pp::ImageData* image_data); |
| |
| // Stops any paints that are in progress. |
| void CancelPaints(); |
| |
| // Invalidates all pages. Use this when some global parameter, such as page |
| // orientation, has changed. |
| void InvalidateAllPages(); |
| |
| // If the page is narrower than the document size, paint the extra space |
| // with the page background. |
| void FillPageSides(int progressive_index); |
| |
| void PaintPageShadow(int progressive_index, pp::ImageData* image_data); |
| |
| // Highlight visible find results and selections. |
| void DrawSelections(int progressive_index, pp::ImageData* image_data); |
| |
| // Paints an page that hasn't finished downloading. |
| void PaintUnavailablePage(int page_index, |
| const pp::Rect& dirty, |
| pp::ImageData* image_data); |
| |
| // Given a page index, returns the corresponding index in progressive_rects_, |
| // or -1 if it doesn't exist. |
| int GetProgressiveIndex(int page_index) const; |
| |
| // Creates a FPDF_BITMAP from a rectangle in screen coordinates. |
| FPDF_BITMAP CreateBitmap(const pp::Rect& rect, |
| pp::ImageData* image_data) const; |
| |
| // Given a rectangle in screen coordinates, returns the coordinates in the |
| // units that PDFium rendering functions expect. |
| void GetPDFiumRect(int page_index, const pp::Rect& rect, int* start_x, |
| int* start_y, int* size_x, int* size_y) const; |
| |
| // Returns the rendering flags to pass to PDFium. |
| int GetRenderingFlags() const; |
| |
| // Returns the currently visible rectangle in document coordinates. |
| pp::Rect GetVisibleRect() const; |
| |
| // Given a rectangle in document coordinates, returns the rectange into screen |
| // coordinates (i.e. 0,0 is top left corner of plugin area). If it's not |
| // visible, an empty rectangle is returned. |
| pp::Rect GetScreenRect(const pp::Rect& rect) const; |
| |
| // Highlights the given rectangle. |
| void Highlight(void* buffer, |
| int stride, |
| const pp::Rect& rect, |
| std::vector<pp::Rect>* highlighted_rects); |
| |
| // Helper function to convert a device to page coordinates. If the page is |
| // not yet loaded, page_x and page_y will be set to 0. |
| void DeviceToPage(int page_index, |
| float device_x, |
| float device_y, |
| double* page_x, |
| double* page_y); |
| |
| // Helper function to get the index of a given FPDF_PAGE. Returns -1 if not |
| // found. |
| int GetVisiblePageIndex(FPDF_PAGE page); |
| |
| // Helper function to change the current page, running page open/close |
| // triggers as necessary. |
| void SetCurrentPage(int index); |
| |
| // Transform |page| contents to fit in the selected printer paper size. |
| void TransformPDFPageForPrinting(FPDF_PAGE page, |
| const PP_PrintSettings_Dev& print_settings); |
| |
| void DrawPageShadow(const pp::Rect& page_rect, |
| const pp::Rect& shadow_rect, |
| const pp::Rect& clip_rect, |
| pp::ImageData* image_data); |
| |
| void GetRegion(const pp::Point& location, |
| pp::ImageData* image_data, |
| void** region, |
| int* stride) const; |
| |
| // Called when the selection changes. |
| void OnSelectionChanged(); |
| |
| // Common code shared by RotateClockwise() and RotateCounterclockwise(). |
| void RotateInternal(); |
| |
| // Setting selection status of document. |
| void SetSelecting(bool selecting); |
| |
| bool PageIndexInBounds(int index) const; |
| |
| // FPDF_FORMFILLINFO callbacks. |
| static void Form_Invalidate(FPDF_FORMFILLINFO* param, |
| FPDF_PAGE page, |
| double left, |
| double top, |
| double right, |
| double bottom); |
| static void Form_OutputSelectedRect(FPDF_FORMFILLINFO* param, |
| FPDF_PAGE page, |
| double left, |
| double top, |
| double right, |
| double bottom); |
| static void Form_SetCursor(FPDF_FORMFILLINFO* param, int cursor_type); |
| static int Form_SetTimer(FPDF_FORMFILLINFO* param, |
| int elapse, |
| TimerCallback timer_func); |
| static void Form_KillTimer(FPDF_FORMFILLINFO* param, int timer_id); |
| static FPDF_SYSTEMTIME Form_GetLocalTime(FPDF_FORMFILLINFO* param); |
| static void Form_OnChange(FPDF_FORMFILLINFO* param); |
| static FPDF_PAGE Form_GetPage(FPDF_FORMFILLINFO* param, |
| FPDF_DOCUMENT document, |
| int page_index); |
| static FPDF_PAGE Form_GetCurrentPage(FPDF_FORMFILLINFO* param, |
| FPDF_DOCUMENT document); |
| static int Form_GetRotation(FPDF_FORMFILLINFO* param, FPDF_PAGE page); |
| static void Form_ExecuteNamedAction(FPDF_FORMFILLINFO* param, |
| FPDF_BYTESTRING named_action); |
| static void Form_SetTextFieldFocus(FPDF_FORMFILLINFO* param, |
| FPDF_WIDESTRING value, |
| FPDF_DWORD valueLen, |
| FPDF_BOOL is_focus); |
| static void Form_DoURIAction(FPDF_FORMFILLINFO* param, FPDF_BYTESTRING uri); |
| static void Form_DoGoToAction(FPDF_FORMFILLINFO* param, |
| int page_index, |
| int zoom_mode, |
| float* position_array, |
| int size_of_array); |
| |
| // IPDF_JSPLATFORM callbacks. |
| static int Form_Alert(IPDF_JSPLATFORM* param, |
| FPDF_WIDESTRING message, |
| FPDF_WIDESTRING title, |
| int type, |
| int icon); |
| static void Form_Beep(IPDF_JSPLATFORM* param, int type); |
| static int Form_Response(IPDF_JSPLATFORM* param, |
| FPDF_WIDESTRING question, |
| FPDF_WIDESTRING title, |
| FPDF_WIDESTRING default_response, |
| FPDF_WIDESTRING label, |
| FPDF_BOOL password, |
| void* response, |
| int length); |
| static int Form_GetFilePath(IPDF_JSPLATFORM* param, |
| void* file_path, |
| int length); |
| static void Form_Mail(IPDF_JSPLATFORM* param, |
| void* mail_data, |
| int length, |
| FPDF_BOOL ui, |
| FPDF_WIDESTRING to, |
| FPDF_WIDESTRING subject, |
| FPDF_WIDESTRING cc, |
| FPDF_WIDESTRING bcc, |
| FPDF_WIDESTRING message); |
| static void Form_Print(IPDF_JSPLATFORM* param, |
| FPDF_BOOL ui, |
| int start, |
| int end, |
| FPDF_BOOL silent, |
| FPDF_BOOL shrink_to_fit, |
| FPDF_BOOL print_as_image, |
| FPDF_BOOL reverse, |
| FPDF_BOOL annotations); |
| static void Form_SubmitForm(IPDF_JSPLATFORM* param, |
| void* form_data, |
| int length, |
| FPDF_WIDESTRING url); |
| static void Form_GotoPage(IPDF_JSPLATFORM* param, int page_number); |
| static int Form_Browse(IPDF_JSPLATFORM* param, void* file_path, int length); |
| |
| #if defined(PDF_ENABLE_XFA) |
| static void Form_EmailTo(FPDF_FORMFILLINFO* param, |
| FPDF_FILEHANDLER* file_handler, |
| FPDF_WIDESTRING to, |
| FPDF_WIDESTRING subject, |
| FPDF_WIDESTRING cc, |
| FPDF_WIDESTRING bcc, |
| FPDF_WIDESTRING message); |
| static void Form_DisplayCaret(FPDF_FORMFILLINFO* param, |
| FPDF_PAGE page, |
| FPDF_BOOL visible, |
| double left, |
| double top, |
| double right, |
| double bottom); |
| static void Form_SetCurrentPage(FPDF_FORMFILLINFO* param, |
| FPDF_DOCUMENT document, |
| int page); |
| static int Form_GetCurrentPageIndex(FPDF_FORMFILLINFO* param, |
| FPDF_DOCUMENT document); |
| static void Form_GetPageViewRect(FPDF_FORMFILLINFO* param, |
| FPDF_PAGE page, |
| double* left, |
| double* top, |
| double* right, |
| double* bottom); |
| static int Form_GetPlatform(FPDF_FORMFILLINFO* param, |
| void* platform, |
| int length); |
| static FPDF_BOOL Form_PopupMenu(FPDF_FORMFILLINFO* param, |
| FPDF_PAGE page, |
| FPDF_WIDGET widget, |
| int menu_flag, |
| float x, |
| float y); |
| static FPDF_BOOL Form_PostRequestURL(FPDF_FORMFILLINFO* param, |
| FPDF_WIDESTRING url, |
| FPDF_WIDESTRING data, |
| FPDF_WIDESTRING content_type, |
| FPDF_WIDESTRING encode, |
| FPDF_WIDESTRING header, |
| FPDF_BSTR* response); |
| static FPDF_BOOL Form_PutRequestURL(FPDF_FORMFILLINFO* param, |
| FPDF_WIDESTRING url, |
| FPDF_WIDESTRING data, |
| FPDF_WIDESTRING encode); |
| static void Form_UploadTo(FPDF_FORMFILLINFO* param, |
| FPDF_FILEHANDLER* file_handler, |
| int file_flag, |
| FPDF_WIDESTRING dest); |
| static FPDF_LPFILEHANDLER Form_DownloadFromURL(FPDF_FORMFILLINFO* param, |
| FPDF_WIDESTRING url); |
| static FPDF_FILEHANDLER* Form_OpenFile(FPDF_FORMFILLINFO* param, |
| int file_flag, |
| FPDF_WIDESTRING url, |
| const char* mode); |
| static void Form_GotoURL(FPDF_FORMFILLINFO* param, |
| FPDF_DOCUMENT document, |
| FPDF_WIDESTRING url); |
| static int Form_GetLanguage(FPDF_FORMFILLINFO* param, |
| void* language, |
| int length); |
| #endif // defined(PDF_ENABLE_XFA) |
| |
| // IFSDK_PAUSE callbacks |
| static FPDF_BOOL Pause_NeedToPauseNow(IFSDK_PAUSE* param); |
| |
| PDFEngine::Client* const client_; |
| pp::Size document_size_; // Size of document in pixels. |
| |
| // The scroll position in screen coordinates. |
| pp::Point position_; |
| // The offset of the page into the viewport. |
| pp::Point page_offset_; |
| // The plugin size in screen coordinates. |
| pp::Size plugin_size_; |
| double current_zoom_; |
| unsigned int current_rotation_; |
| |
| std::unique_ptr<DocumentLoader> doc_loader_; // Main document's loader. |
| std::string url_; |
| std::string headers_; |
| pp::CompletionCallbackFactory<PDFiumEngine> find_factory_; |
| |
| pp::CompletionCallbackFactory<PDFiumEngine> password_factory_; |
| int32_t password_tries_remaining_; |
| |
| // The current text used for searching. |
| std::string current_find_text_; |
| |
| // The PDFium wrapper object for the document. |
| FPDF_DOCUMENT doc_; |
| |
| // The PDFium wrapper for form data. Used even if there are no form controls |
| // on the page. |
| FPDF_FORMHANDLE form_; |
| |
| // The page(s) of the document. |
| std::vector<std::unique_ptr<PDFiumPage>> pages_; |
| |
| // The indexes of the pages currently visible. |
| std::vector<int> visible_pages_; |
| |
| // The indexes of the pages pending download. |
| std::vector<int> pending_pages_; |
| |
| // During handling of input events we don't want to unload any pages in |
| // callbacks to us from PDFium, since the current page can change while PDFium |
| // code still has a pointer to it. |
| bool defer_page_unload_; |
| std::vector<int> deferred_page_unloads_; |
| |
| // Used for selection. There could be more than one range if selection spans |
| // more than one page. |
| std::vector<PDFiumRange> selection_; |
| // True if we're in the middle of selection. |
| bool selecting_; |
| |
| MouseDownState mouse_down_state_; |
| |
| // Used for searching. |
| typedef std::vector<PDFiumRange> FindResults; |
| FindResults find_results_; |
| // Which page to search next. |
| int next_page_to_search_; |
| // Where to stop searching. |
| int last_page_to_search_; |
| int last_character_index_to_search_; // -1 if search until end of page. |
| // Which result the user has currently selected. |
| FindTextIndex current_find_index_; |
| // Where to resume searching. |
| FindTextIndex resume_find_index_; |
| |
| // Permissions bitfield. |
| unsigned long permissions_; |
| |
| // Permissions security handler revision number. -1 for unknown. |
| int permissions_handler_revision_; |
| |
| // Interface structure to provide access to document stream. |
| FPDF_FILEACCESS file_access_; |
| // Interface structure to check data availability in the document stream. |
| FileAvail file_availability_; |
| // Interface structure to request data chunks from the document stream. |
| DownloadHints download_hints_; |
| // Pointer to the document availability interface. |
| FPDF_AVAIL fpdf_availability_; |
| |
| pp::Size default_page_size_; |
| |
| // Used to manage timers that form fill API needs. The pair holds the timer |
| // period, in ms, and the callback function. |
| std::map<int, std::pair<int, TimerCallback> > timers_; |
| int next_timer_id_; |
| |
| // Holds the zero-based page index of the last page that the mouse clicked on. |
| int last_page_mouse_down_; |
| |
| // Holds the zero-based page index of the most visible page; refreshed by |
| // calling CalculateVisiblePages() |
| int most_visible_page_; |
| |
| // Holds the page index requested by PDFium while the scroll operation |
| // is being handled (asynchronously). |
| base::Optional<int> in_flight_visible_page_; |
| |
| // Set to true after FORM_DoDocumentJSAction/FORM_DoDocumentOpenAction have |
| // been called. Only after that can we call FORM_DoPageAAction. |
| bool called_do_document_action_; |
| |
| // Records parts of form fields that need to be highlighted at next paint, in |
| // screen coordinates. |
| std::vector<pp::Rect> form_highlights_; |
| |
| // Whether to render in grayscale or in color. |
| bool render_grayscale_; |
| |
| // Whether to render PDF annotations. |
| bool render_annots_; |
| |
| // The link currently under the cursor. |
| std::string link_under_cursor_; |
| |
| // Pending progressive paints. |
| struct ProgressivePaint { |
| pp::Rect rect; // In screen coordinates. |
| FPDF_BITMAP bitmap; |
| int page_index; |
| // Temporary used to figure out if in a series of Paint() calls whether this |
| // pending paint was updated or not. |
| bool painted_; |
| }; |
| std::vector<ProgressivePaint> progressive_paints_; |
| |
| // Keeps track of when we started the last progressive paint, so that in our |
| // callback we can determine if we need to pause. |
| base::Time last_progressive_start_time_; |
| |
| // The timeout to use for the current progressive paint. |
| int progressive_paint_timeout_; |
| |
| // Shadow matrix for generating the page shadow bitmap. |
| std::unique_ptr<ShadowMatrix> page_shadow_; |
| |
| // Set to true if the user is being prompted for their password. Will be set |
| // to false after the user finishes getting their password. |
| bool getting_password_; |
| |
| // While true, the document try to be opened and parsed after download each |
| // part. Else the document will be opened and parsed only on finish of |
| // downloading. |
| bool process_when_pending_request_complete_ = true; |
| |
| DISALLOW_COPY_AND_ASSIGN(PDFiumEngine); |
| }; |
| |
| // Create a local variable of this when calling PDFium functions which can call |
| // our global callback when an unsupported feature is reached. |
| class ScopedUnsupportedFeature { |
| public: |
| explicit ScopedUnsupportedFeature(PDFiumEngine* engine); |
| ~ScopedUnsupportedFeature(); |
| |
| private: |
| PDFiumEngine* const old_engine_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScopedUnsupportedFeature); |
| }; |
| |
| // Create a local variable of this when calling PDFium functions which can call |
| // our global callback when a substitute font is mapped. |
| class ScopedSubstFont { |
| public: |
| explicit ScopedSubstFont(PDFiumEngine* engine); |
| ~ScopedSubstFont(); |
| |
| private: |
| PDFiumEngine* const old_engine_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScopedSubstFont); |
| }; |
| |
| class PDFiumEngineExports : public PDFEngineExports { |
| public: |
| PDFiumEngineExports() {} |
| |
| // PDFEngineExports: |
| #if defined(OS_WIN) |
| bool RenderPDFPageToDC(void* pdf_handle, |
| int page_number, |
| const RenderingSettings& settings, |
| HDC dc) override; |
| void SetPDFEnsureTypefaceCharactersAccessible( |
| PDFEnsureTypefaceCharactersAccessible func) override; |
| |
| void SetPDFUseGDIPrinting(bool enable) override; |
| #endif // defined(OS_WIN) |
| bool RenderPDFPageToBitmap(void* pdf_handle, |
| int page_number, |
| const RenderingSettings& settings, |
| void* bitmap_buffer) override; |
| bool GetPDFDocInfo(const void* pdf_buffer, |
| int buffer_size, |
| int* page_count, |
| double* max_page_width, |
| void** pdf_handle) override; |
| void ReleasePDFHandle(void* pdf_handle) override; |
| bool GetPDFPageSizeByIndex(void* pdf_handle, |
| int page_number, |
| double* width, |
| double* height) override; |
| }; |
| |
| } // namespace chrome_pdf |
| |
| #endif // PDF_PDFIUM_PDFIUM_ENGINE_H_ |