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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 <stdint.h>
#include "build/build_config.h"
#if defined(OS_WIN)
#include <windows.h>
#include <memory>
#include <string>
#include <vector>
#include "base/strings/string16.h"
#include "ppapi/c/dev/pp_cursor_type_dev.h"
#include "ppapi/c/dev/ppp_printing_dev.h"
#include "ppapi/c/ppb_input_event.h"
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/cpp/image_data.h"
#include "ppapi/cpp/rect.h"
#include "ppapi/cpp/size.h"
#include "ppapi/cpp/url_loader.h"
#include "ppapi/cpp/var_array.h"
#include "ui/base/window_open_disposition.h"
#if defined(OS_WIN)
typedef void (*PDFEnsureTypefaceCharactersAccessible)(const LOGFONT* font,
const wchar_t* text,
size_t text_length);
namespace pp {
class InputEvent;
class VarDictionary;
namespace chrome_pdf {
// Do one time initialization of the SDK.
bool InitializeSDK();
// Tells the SDK that we're shutting down.
void ShutdownSDK();
// This class encapsulates a PDF rendering engine.
class PDFEngine {
enum DocumentPermission {
// The interface that's provided to the rendering engine.
class Client {
virtual ~Client() {}
// Informs the client about the document's size in pixels.
virtual void DocumentSizeUpdated(const pp::Size& size) = 0;
// Informs the client that the given rect needs to be repainted.
virtual void Invalidate(const pp::Rect& rect) = 0;
// Informs the client to scroll the plugin area by the given offset.
virtual void Scroll(const pp::Point& point) = 0;
// Scroll the horizontal/vertical scrollbars to a given position.
virtual void ScrollToX(int position) = 0;
virtual void ScrollToY(int position) = 0;
// Scroll to zero-based |page|.
virtual void ScrollToPage(int page) = 0;
// Navigate to the given url.
virtual void NavigateTo(const std::string& url,
WindowOpenDisposition disposition) = 0;
// Updates the cursor.
virtual void UpdateCursor(PP_CursorType_Dev cursor) = 0;
// Updates the tick marks in the vertical scrollbar.
virtual void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks) = 0;
// Updates the number of find results for the current search term. If
// there are no matches 0 should be passed in. Only when the plugin has
// finished searching should it pass in the final count with final_result
// set to true.
virtual void NotifyNumberOfFindResultsChanged(int total,
bool final_result) = 0;
// Updates the index of the currently selected search item.
virtual void NotifySelectedFindResultChanged(int current_find_index) = 0;
// Prompts the user for a password to open this document. The callback is
// called when the password is retrieved.
virtual void GetDocumentPassword(
pp::CompletionCallbackWithOutput<pp::Var> callback) = 0;
// Puts up an alert with the given message.
virtual void Alert(const std::string& message) = 0;
// Puts up a confirm with the given message, and returns true if the user
// presses OK, or false if they press cancel.
virtual bool Confirm(const std::string& message) = 0;
// Puts up a prompt with the given message and default answer and returns
// the answer.
virtual std::string Prompt(const std::string& question,
const std::string& default_answer) = 0;
// Returns the url of the pdf.
virtual std::string GetURL() = 0;
// Send an email.
virtual void Email(const std::string& to,
const std::string& cc,
const std::string& bcc,
const std::string& subject,
const std::string& body) = 0;
// Put up the print dialog.
virtual void Print() = 0;
// Submit the data using HTTP POST.
virtual void SubmitForm(const std::string& url,
const void* data,
int length) = 0;
// Pops up a file selection dialog and returns the result.
virtual std::string ShowFileSelectionDialog() = 0;
// Creates and returns new URL loader for partial document requests.
virtual pp::URLLoader CreateURLLoader() = 0;
// Calls the client's OnCallback() function in |delay_in_ms| with the given
// |id|.
virtual void ScheduleCallback(int id, int delay_in_ms) = 0;
// Calls the client's OnTouchTimerCallback() function in |delay_in_ms| with
// the given |id|.
virtual void ScheduleTouchTimerCallback(int id, int delay_in_ms) = 0;
// Searches the given string for "term" and returns the results. Unicode-
// aware.
struct SearchStringResult {
int start_index;
int length;
virtual void SearchString(const base::char16* string,
const base::char16* term,
bool case_sensitive,
std::vector<SearchStringResult>* results) = 0;
// Notifies the client that the engine has painted a page from the document.
virtual void DocumentPaintOccurred() = 0;
// Notifies the client that the document has finished loading.
virtual void DocumentLoadComplete(int page_count) = 0;
// Notifies the client that the document has failed to load.
virtual void DocumentLoadFailed() = 0;
// Notifies the client that the document has requested substitute fonts.
virtual void FontSubstituted() = 0;
virtual pp::Instance* GetPluginInstance() = 0;
// Notifies that an unsupported feature in the PDF was encountered.
virtual void DocumentHasUnsupportedFeature(const std::string& feature) = 0;
// Notifies the client about document load progress.
virtual void DocumentLoadProgress(uint32_t available,
uint32_t doc_size) = 0;
// Notifies the client about focus changes for form text fields.
virtual void FormTextFieldFocusChange(bool in_focus) = 0;
// Returns true if the plugin has been opened within print preview.
virtual bool IsPrintPreview() = 0;
// Get the background color of the PDF.
virtual uint32_t GetBackgroundColor() = 0;
// Cancel browser initiated document download.
virtual void CancelBrowserDownload() = 0;
// Sets selection status.
virtual void IsSelectingChanged(bool is_selecting) {}
virtual void SelectionChanged(const pp::Rect& left, const pp::Rect& right) {
// Factory method to create an instance of the PDF Engine.
static std::unique_ptr<PDFEngine> Create(Client* client);
virtual ~PDFEngine() {}
// Most of these functions are similar to the Pepper functions of the same
// name, so not repeating the description here unless it's different.
virtual bool New(const char* url, const char* headers) = 0;
virtual void PageOffsetUpdated(const pp::Point& page_offset) = 0;
virtual void PluginSizeUpdated(const pp::Size& size) = 0;
virtual void ScrolledToXPosition(int position) = 0;
virtual void ScrolledToYPosition(int position) = 0;
// Paint is called a series of times. Before these n calls are made, PrePaint
// is called once. After Paint is called n times, PostPaint is called once.
virtual void PrePaint() = 0;
virtual void Paint(const pp::Rect& rect,
pp::ImageData* image_data,
std::vector<pp::Rect>* ready,
std::vector<pp::Rect>* pending) = 0;
virtual void PostPaint() = 0;
virtual bool HandleDocumentLoad(const pp::URLLoader& loader) = 0;
virtual bool HandleEvent(const pp::InputEvent& event) = 0;
virtual uint32_t QuerySupportedPrintOutputFormats() = 0;
virtual void PrintBegin() = 0;
virtual pp::Resource PrintPages(
const PP_PrintPageNumberRange_Dev* page_ranges,
uint32_t page_range_count,
const PP_PrintSettings_Dev& print_settings) = 0;
virtual void PrintEnd() = 0;
virtual void StartFind(const std::string& text, bool case_sensitive) = 0;
virtual bool SelectFindResult(bool forward) = 0;
virtual void StopFind() = 0;
virtual void ZoomUpdated(double new_zoom_level) = 0;
virtual void RotateClockwise() = 0;
virtual void RotateCounterclockwise() = 0;
virtual std::string GetSelectedText() = 0;
virtual bool CanCut() = 0;
virtual std::string GetLinkAtPosition(const pp::Point& point) = 0;
// Checks the permissions associated with this document.
virtual bool HasPermission(DocumentPermission permission) const = 0;
virtual void SelectAll() = 0;
// Gets the number of pages in the document.
virtual int GetNumberOfPages() = 0;
// Gets the 0-based page number of |destination|, or -1 if it does not exist.
virtual int GetNamedDestinationPage(const std::string& destination) = 0;
// Gets the index of the most visible page, or -1 if none are visible.
virtual int GetMostVisiblePage() = 0;
// Gets the rectangle of the page including shadow.
virtual pp::Rect GetPageRect(int index) = 0;
// Gets the rectangle of the page not including the shadow.
virtual pp::Rect GetPageBoundsRect(int index) = 0;
// Gets the rectangle of the page excluding any additional areas.
virtual pp::Rect GetPageContentsRect(int index) = 0;
// Returns a page's rect in screen coordinates, as well as its surrounding
// border areas and bottom separator.
virtual pp::Rect GetPageScreenRect(int page_index) const = 0;
// Gets the offset of the vertical scrollbar from the top in document
// coordinates.
virtual int GetVerticalScrollbarYPosition() = 0;
// Set color / grayscale rendering modes.
virtual void SetGrayscale(bool grayscale) = 0;
// Callback for timer that's set with ScheduleCallback().
virtual void OnCallback(int id) = 0;
// Callback for timer that's set with ScheduleTouchTimerCallback().
virtual void OnTouchTimerCallback(int id) = 0;
// Get the number of characters on a given page.
virtual int GetCharCount(int page_index) = 0;
// Get the bounds in page pixels of a character on a given page.
virtual pp::FloatRect GetCharBounds(int page_index, int char_index) = 0;
// Get a given unicode character on a given page.
virtual uint32_t GetCharUnicode(int page_index, int char_index) = 0;
// Given a start char index, find the longest continuous run of text that's
// in a single direction and with the same style and font size. Return the
// length of that sequence and its font size and bounding box.
virtual void GetTextRunInfo(int page_index,
int start_char_index,
uint32_t* out_len,
double* out_font_size,
pp::FloatRect* out_bounds) = 0;
// Gets the PDF document's print scaling preference. True if the document can
// be scaled to fit.
virtual bool GetPrintScaling() = 0;
// Returns number of copies to be printed.
virtual int GetCopiesToPrint() = 0;
// Returns the duplex setting.
virtual int GetDuplexType() = 0;
// Returns true if all the pages are the same size.
virtual bool GetPageSizeAndUniformity(pp::Size* size) = 0;
// Returns a VarArray of Bookmarks, each a VarDictionary containing the
// following key/values:
// - "title" - a string Var.
// - "page" - an int Var.
// - "children" - a VarArray(), with each entry containing a VarDictionary of
// the same structure.
virtual pp::VarArray GetBookmarks() = 0;
// Append blank pages to make a 1-page document to a |num_pages| document.
// Always retain the first page data.
virtual void AppendBlankPages(int num_pages) = 0;
// Append the first page of the document loaded with the |engine| to this
// document at page |index|.
virtual void AppendPage(PDFEngine* engine, int index) = 0;
#if defined(PDF_ENABLE_XFA)
// Allow client to set scroll positions in document coordinates. Note that
// this is meant for cases where the device scale factor changes, and not for
// general scrolling - the engine will not repaint due to this.
virtual void SetScrollPosition(const pp::Point& position) = 0;
virtual std::string GetMetadata(const std::string& key) = 0;
virtual void SetCaretPosition(const pp::Point& position) = 0;
virtual void MoveRangeSelectionExtent(const pp::Point& extent) = 0;
virtual void SetSelectionBounds(const pp::Point& base,
const pp::Point& extent) = 0;
// Interface for exports that wrap the PDF engine.
class PDFEngineExports {
struct RenderingSettings {
RenderingSettings(int dpi_x,
int dpi_y,
const pp::Rect& bounds,
bool fit_to_bounds,
bool stretch_to_bounds,
bool keep_aspect_ratio,
bool center_in_bounds,
bool autorotate);
RenderingSettings(const RenderingSettings& that);
int dpi_x;
int dpi_y;
pp::Rect bounds;
bool fit_to_bounds;
bool stretch_to_bounds;
bool keep_aspect_ratio;
bool center_in_bounds;
bool autorotate;
PDFEngineExports() {}
virtual ~PDFEngineExports() {}
static PDFEngineExports* Get();
#if defined(OS_WIN)
// See the definition of RenderPDFPageToDC in for details.
virtual bool RenderPDFPageToDC(const void* pdf_buffer,
int buffer_size,
int page_number,
const RenderingSettings& settings,
HDC dc) = 0;
virtual void SetPDFEnsureTypefaceCharactersAccessible(
PDFEnsureTypefaceCharactersAccessible func) = 0;
virtual void SetPDFUseGDIPrinting(bool enable) = 0;
virtual void SetPDFUsePrintMode(int mode) = 0;
#endif // defined(OS_WIN)
// See the definition of RenderPDFPageToBitmap in for details.
virtual bool RenderPDFPageToBitmap(const void* pdf_buffer,
int pdf_buffer_size,
int page_number,
const RenderingSettings& settings,
void* bitmap_buffer) = 0;
virtual bool GetPDFDocInfo(const void* pdf_buffer,
int buffer_size,
int* page_count,
double* max_page_width) = 0;
// See the definition of GetPDFPageSizeByIndex in for details.
virtual bool GetPDFPageSizeByIndex(const void* pdf_buffer,
int pdf_buffer_size,
int page_number,
double* width,
double* height) = 0;
} // namespace chrome_pdf
#endif // PDF_PDF_ENGINE_H_