Refactor webview to use //components/printing

android_webview/renderer/print_web_view_helper.h

Index: android_webview/renderer/print_web_view_helper.h
diff --git a/android_webview/renderer/print_web_view_helper.h b/android_webview/renderer/print_web_view_helper.h
deleted file mode 100644
index 529a67f4085bdb4a1affb733f9b388b4e168aceb..0000000000000000000000000000000000000000
--- a/android_webview/renderer/print_web_view_helper.h
+++ /dev/null
@@ -1,478 +0,0 @@
-// Copyright 2013 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.
-
-// TODO(sgurun) copied from chrome/renderer. Remove after crbug.com/322276
-
-#ifndef AW_RENDERER_PRINT_WEB_VIEW_HELPER_H_
-#define AW_RENDERER_PRINT_WEB_VIEW_HELPER_H_
-
-#include <vector>
-
-#include "base/gtest_prod_util.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/shared_memory.h"
-#include "base/memory/weak_ptr.h"
-#include "base/time/time.h"
-#include "content/public/renderer/render_view_observer.h"
-#include "content/public/renderer/render_view_observer_tracker.h"
-#include "printing/pdf_metafile_skia.h"
-#include "third_party/WebKit/public/platform/WebCanvas.h"
-#include "third_party/WebKit/public/web/WebNode.h"
-#include "third_party/WebKit/public/web/WebPrintParams.h"
-#include "ui/gfx/geometry/size.h"
-
-struct PrintMsg_Print_Params;
-struct PrintMsg_PrintPage_Params;
-struct PrintMsg_PrintPages_Params;
-
-namespace base {
-class DictionaryValue;
-}
-
-namespace blink {
-class WebFrame;
-class WebView;
-}
-
-namespace printing {
-
-struct PageSizeMargins;
-class PrepareFrameAndViewForPrint;
-
-// Stores reference to frame using WebVew and unique name.
-// Workaround to modal dialog issue on Linux. crbug.com/236147.
-// If WebFrame someday supports WeakPtr, we should use it here.
-class FrameReference {
- public:
-  explicit FrameReference(blink::WebLocalFrame* frame);
-  FrameReference();
-  ~FrameReference();
-
-  void Reset(blink::WebLocalFrame* frame);
-
-  blink::WebLocalFrame* GetFrame();
-  blink::WebView* view();
-
- private:
-  blink::WebView* view_;
-  blink::WebLocalFrame* frame_;
-};
-
-// PrintWebViewHelper handles most of the printing grunt work for RenderView.
-// We plan on making print asynchronous and that will require copying the DOM
-// of the document and creating a new WebView with the contents.
-class PrintWebViewHelper
-    : public content::RenderViewObserver,
-      public content::RenderViewObserverTracker<PrintWebViewHelper> {
- public:
-  explicit PrintWebViewHelper(content::RenderView* render_view);
-  virtual ~PrintWebViewHelper();
-
-  bool IsPrintingEnabled();
-
-  void PrintNode(const blink::WebNode& node);
-
- private:
-  friend class PrintWebViewHelperTestBase;
-  FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest,
-                           BlockScriptInitiatedPrinting);
-  FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest,
-                           BlockScriptInitiatedPrintingFromPopup);
-  FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, OnPrintPages);
-
-#if defined(OS_WIN) || defined(OS_MACOSX)
-  FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, PrintLayoutTest);
-  FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperTest, PrintWithIframe);
-#endif  // defined(OS_WIN) || defined(OS_MACOSX)
-
-  enum PrintingResult {
-    OK,
-    FAIL_PRINT_INIT,
-    FAIL_PRINT,
-    FAIL_PREVIEW,
-  };
-
-  enum PrintPreviewErrorBuckets {
-    PREVIEW_ERROR_NONE,  // Always first.
-    PREVIEW_ERROR_BAD_SETTING,
-    PREVIEW_ERROR_METAFILE_COPY_FAILED,
-    PREVIEW_ERROR_METAFILE_INIT_FAILED,
-    PREVIEW_ERROR_ZERO_PAGES,
-    PREVIEW_ERROR_MAC_DRAFT_METAFILE_INIT_FAILED,
-    PREVIEW_ERROR_PAGE_RENDERED_WITHOUT_METAFILE,
-    PREVIEW_ERROR_UPDATING_PRINT_SETTINGS,
-    PREVIEW_ERROR_INVALID_PRINTER_SETTINGS,
-    PREVIEW_ERROR_LAST_ENUM  // Always last.
-  };
-
-  enum PrintPreviewRequestType {
-    PRINT_PREVIEW_USER_INITIATED_ENTIRE_FRAME,
-    PRINT_PREVIEW_USER_INITIATED_SELECTION,
-    PRINT_PREVIEW_USER_INITIATED_CONTEXT_NODE,
-    PRINT_PREVIEW_SCRIPTED  // triggered by window.print().
-  };
-
-  // RenderViewObserver implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
-  virtual void PrintPage(blink::WebLocalFrame* frame,
-                         bool user_initiated) override;
-  virtual void DidStartLoading() override;
-  virtual void DidStopLoading() override;
-
-  // Message handlers ---------------------------------------------------------
-  void OnPrintPages();
-  void OnPrintForSystemDialog();
-  void OnInitiatePrintPreview(bool selection_only);
-  void OnPrintPreview(const base::DictionaryValue& settings);
-  void OnPrintForPrintPreview(const base::DictionaryValue& job_settings);
-  void OnPrintingDone(bool success);
-
-  // Get |page_size| and |content_area| information from
-  // |page_layout_in_points|.
-  void GetPageSizeAndContentAreaFromPageLayout(
-      const PageSizeMargins& page_layout_in_points,
-      gfx::Size* page_size,
-      gfx::Rect* content_area);
-
-  // Update |ignore_css_margins_| based on settings.
-  void UpdateFrameMarginsCssInfo(const base::DictionaryValue& settings);
-
-  // Returns true if the current destination printer is PRINT_TO_PDF.
-  bool IsPrintToPdfRequested(const base::DictionaryValue& settings);
-
-  // Returns the print scaling option to retain/scale/crop the source page size
-  // to fit the printable area of the paper.
-  //
-  // We retain the source page size when the current destination printer is
-  // SAVE_AS_PDF.
-  //
-  // We crop the source page size to fit the printable area or we print only the
-  // left top page contents when
-  // (1) Source is PDF and the user has requested not to fit to printable area
-  // via |job_settings|.
-  // (2) Source is PDF. This is the first preview request and print scaling
-  // option is disabled for initiator renderer plugin.
-  //
-  // In all other cases, we scale the source page to fit the printable area.
-  blink::WebPrintScalingOption GetPrintScalingOption(
-      bool source_is_html,
-      const base::DictionaryValue& job_settings,
-      const PrintMsg_Print_Params& params);
-
-  // Prepare frame for creating preview document.
-  void PrepareFrameForPreviewDocument();
-
-  // Continue creating preview document.
-  void OnFramePreparedForPreviewDocument();
-
-  // Initialize the print preview document.
-  bool CreatePreviewDocument();
-
-  // Renders a print preview page. |page_number| is 0-based.
-  // Returns true if print preview should continue, false on failure.
-  bool RenderPreviewPage(int page_number,
-                         const PrintMsg_Print_Params& print_params);
-
-  // Finalize the print ready preview document.
-  bool FinalizePrintReadyDocument();
-
-  // Enable/Disable window.print calls.  If |blocked| is true window.print
-  // calls will silently fail.  Call with |blocked| set to false to reenable.
-  void SetScriptedPrintBlocked(bool blocked);
-
-  // Main printing code -------------------------------------------------------
-
-  void Print(blink::WebLocalFrame* frame, const blink::WebNode& node);
-
-  // Notification when printing is done - signal tear-down/free resources.
-  void DidFinishPrinting(PrintingResult result);
-
-  // Print Settings -----------------------------------------------------------
-
-  // Initialize print page settings with default settings.
-  // Used only for native printing workflow.
-  bool InitPrintSettings(bool fit_to_paper_size);
-
-  // Calculate number of pages in source document.
-  bool CalculateNumberOfPages(blink::WebLocalFrame* frame,
-                              const blink::WebNode& node,
-                              int* number_of_pages);
-
-  // Update the current print settings with new |passed_job_settings|.
-  // |passed_job_settings| dictionary contains print job details such as printer
-  // name, number of copies, page range, etc.
-  bool UpdatePrintSettings(blink::WebLocalFrame* frame,
-                           const blink::WebNode& node,
-                           const base::DictionaryValue& passed_job_settings);
-
-  // Get final print settings from the user.
-  // Return false if the user cancels or on error.
-  bool GetPrintSettingsFromUser(blink::WebFrame* frame,
-                                const blink::WebNode& node,
-                                int expected_pages_count);
-
-  // Page Printing / Rendering ------------------------------------------------
-
-  void OnFramePreparedForPrintPages();
-  void PrintPages();
-  bool PrintPagesNative(blink::WebFrame* frame,
-                        int page_count,
-                        const gfx::Size& canvas_size);
-  void FinishFramePrinting();
-
-  // Prints the page listed in |params|.
-#if defined(OS_LINUX) || defined(OS_ANDROID)
-  void PrintPageInternal(const PrintMsg_PrintPage_Params& params,
-                         const gfx::Size& canvas_size,
-                         blink::WebFrame* frame,
-                         PdfMetafileSkia* metafile);
-#else
-  void PrintPageInternal(const PrintMsg_PrintPage_Params& params,
-                         const gfx::Size& canvas_size,
-                         blink::WebFrame* frame);
-#endif
-
-  // Render the frame for printing.
-  bool RenderPagesForPrint(blink::WebLocalFrame* frame,
-                           const blink::WebNode& node);
-
-  // Platform specific helper function for rendering page(s) to |metafile|.
-#if defined(OS_WIN)
-  void RenderPage(const PrintMsg_Print_Params& params,
-                  int page_number,
-                  blink::WebFrame* frame,
-                  bool is_preview,
-                  PdfMetafileSkia* metafile,
-                  double* scale_factor,
-                  gfx::Size* page_size_in_dpi,
-                  gfx::Rect* content_area_in_dpi);
-#elif defined(OS_MACOSX)
-  void RenderPage(const PrintMsg_Print_Params& params,
-                  int page_number,
-                  blink::WebFrame* frame,
-                  bool is_preview,
-                  PdfMetafileSkia* metafile,
-                  gfx::Size* page_size,
-                  gfx::Rect* content_rect);
-#endif  // defined(OS_WIN)
-
-  // Renders page contents from |frame| to |content_area| of |canvas|.
-  // |page_number| is zero-based.
-  // When method is called, canvas should be setup to draw to |canvas_area|
-  // with |scale_factor|.
-  static float RenderPageContent(blink::WebFrame* frame,
-                                 int page_number,
-                                 const gfx::Rect& canvas_area,
-                                 const gfx::Rect& content_area,
-                                 double scale_factor,
-                                 blink::WebCanvas* canvas);
-
-  // Helper methods -----------------------------------------------------------
-
-  bool CopyMetafileDataToSharedMem(PdfMetafileSkia* metafile,
-                                   base::SharedMemoryHandle* shared_mem_handle);
-
-  // Helper method to get page layout in points and fit to page if needed.
-  static void ComputePageLayoutInPointsForCss(
-      blink::WebFrame* frame,
-      int page_index,
-      const PrintMsg_Print_Params& default_params,
-      bool ignore_css_margins,
-      double* scale_factor,
-      PageSizeMargins* page_layout_in_points);
-
-  // Given the |device| and |canvas| to draw on, prints the appropriate headers
-  // and footers using strings from |header_footer_info| on to the canvas.
-  static void PrintHeaderAndFooter(
-      blink::WebCanvas* canvas,
-      int page_number,
-      int total_pages,
-      float webkit_scale_factor,
-      const PageSizeMargins& page_layout_in_points,
-      const base::DictionaryValue& header_footer_info,
-      const PrintMsg_Print_Params& params);
-
-  bool GetPrintFrame(blink::WebLocalFrame** frame);
-
-  // Script Initiated Printing ------------------------------------------------
-
-  // Return true if script initiated printing is currently
-  // allowed. |user_initiated| should be true when a user event triggered the
-  // script, most likely by pressing a print button on the page.
-  bool IsScriptInitiatedPrintAllowed(blink::WebFrame* frame,
-                                     bool user_initiated);
-
-  // Returns true if script initiated printing occurs too often.
-  bool IsScriptInitiatedPrintTooFrequent(blink::WebFrame* frame);
-
-  // Reset the counter for script initiated printing.
-  // Scripted printing will be allowed to continue.
-  void ResetScriptedPrintCount();
-
-  // Increment the counter for script initiated printing.
-  // Scripted printing will be blocked for a limited amount of time.
-  void IncrementScriptedPrintCount();
-
-  // Shows scripted print preview when options from plugin are availible.
-  void ShowScriptedPrintPreview();
-
-  void RequestPrintPreview(PrintPreviewRequestType type);
-
-  // Checks whether print preview should continue or not.
-  // Returns true if cancelling, false if continuing.
-  bool CheckForCancel();
-
-  // Notifies the browser a print preview page has been rendered.
-  // |page_number| is 0-based.
-  // For a valid |page_number| with modifiable content,
-  // |metafile| is the rendered page. Otherwise |metafile| is NULL.
-  // Returns true if print preview should continue, false on failure.
-  bool PreviewPageRendered(int page_number, PdfMetafileSkia* metafile);
-
-  // WebView used only to print the selection.
-  scoped_ptr<PrepareFrameAndViewForPrint> prep_frame_view_;
-  bool reset_prep_frame_view_;
-
-  scoped_ptr<PrintMsg_PrintPages_Params> print_pages_params_;
-  bool is_preview_enabled_;
-  bool is_scripted_print_throttling_disabled_;
-  bool is_print_ready_metafile_sent_;
-  bool ignore_css_margins_;
-
-  // Used for scripted initiated printing blocking.
-  base::Time last_cancelled_script_print_;
-  int user_cancelled_scripted_print_count_;
-  bool is_scripted_printing_blocked_;
-
-  // Let the browser process know of a printing failure. Only set to false when
-  // the failure came from the browser in the first place.
-  bool notify_browser_of_print_failure_;
-
-  // True, when printing from print preview.
-  bool print_for_preview_;
-
-  // Strings generated by the browser process to be printed as headers and
-  // footers if requested by the user.
-  scoped_ptr<base::DictionaryValue> header_footer_info_;
-
-  // Keeps track of the state of print preview between messages.
-  // TODO(vitalybuka): Create PrintPreviewContext when needed and delete after
-  // use. Now it's interaction with various messages is confusing.
-  class PrintPreviewContext {
-   public:
-    PrintPreviewContext();
-    ~PrintPreviewContext();
-
-    // Initializes the print preview context. Need to be called to set
-    // the |web_frame| / |web_node| to generate the print preview for.
-    void InitWithFrame(blink::WebLocalFrame* web_frame);
-    void InitWithNode(const blink::WebNode& web_node);
-
-    // Does bookkeeping at the beginning of print preview.
-    void OnPrintPreview();
-
-    // Create the print preview document. |pages| is empty to print all pages.
-    // Takes ownership of |prepared_frame|.
-    bool CreatePreviewDocument(PrepareFrameAndViewForPrint* prepared_frame,
-                               const std::vector<int>& pages);
-
-    // Called after a page gets rendered. |page_time| is how long the
-    // rendering took.
-    void RenderedPreviewPage(const base::TimeDelta& page_time);
-
-    // Updates the print preview context when the required pages are rendered.
-    void AllPagesRendered();
-
-    // Finalizes the print ready preview document.
-    void FinalizePrintReadyDocument();
-
-    // Cleanup after print preview finishes.
-    void Finished();
-
-    // Cleanup after print preview fails.
-    void Failed(bool report_error);
-
-    // Helper functions
-    int GetNextPageNumber();
-    bool IsRendering() const;
-    bool IsModifiable();
-    bool HasSelection();
-    bool IsLastPageOfPrintReadyMetafile() const;
-    bool IsFinalPageRendered() const;
-
-    // Setters
-    void set_generate_draft_pages(bool generate_draft_pages);
-    void set_error(enum PrintPreviewErrorBuckets error);
-
-    // Getters
-    // Original frame for which preview was requested.
-    blink::WebLocalFrame* source_frame();
-    // Original node for which preview was requested.
-    const blink::WebNode& source_node() const;
-
-    // Frame to be use to render preview. May be the same as source_frame(), or
-    // generated from it, e.g. copy of selected block.
-    blink::WebLocalFrame* prepared_frame();
-    // Node to be use to render preview. May be the same as source_node(), or
-    // generated from it, e.g. copy of selected block.
-    const blink::WebNode& prepared_node() const;
-
-    int total_page_count() const;
-    bool generate_draft_pages() const;
-    PdfMetafileSkia* metafile();
-    gfx::Size GetPrintCanvasSize() const;
-    int last_error() const;
-
-   private:
-    enum State {
-      UNINITIALIZED,  // Not ready to render.
-      INITIALIZED,    // Ready to render.
-      RENDERING,      // Rendering.
-      DONE            // Finished rendering.
-    };
-
-    // Reset some of the internal rendering context.
-    void ClearContext();
-
-    // Specifies what to render for print preview.
-    FrameReference source_frame_;
-    blink::WebNode source_node_;
-
-    scoped_ptr<PrepareFrameAndViewForPrint> prep_frame_view_;
-    scoped_ptr<PdfMetafileSkia> metafile_;
-
-    // Total page count in the renderer.
-    int total_page_count_;
-
-    // The current page to render.
-    int current_page_index_;
-
-    // List of page indices that need to be rendered.
-    std::vector<int> pages_to_render_;
-
-    // True, when draft pages needs to be generated.
-    bool generate_draft_pages_;
-
-    // Specifies the total number of pages in the print ready metafile.
-    int print_ready_metafile_page_count_;
-
-    base::TimeDelta document_render_time_;
-    base::TimeTicks begin_time_;
-
-    enum PrintPreviewErrorBuckets error_;
-
-    State state_;
-  };
-
-  bool print_node_in_progress_;
-  PrintPreviewContext print_preview_context_;
-  bool is_loading_;
-  bool is_scripted_preview_delayed_;
-  base::WeakPtrFactory<PrintWebViewHelper> weak_ptr_factory_;
-  DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
-};
-
-}  // namespace printing
-
-#endif  // AW_RENDERER_PRINT_WEB_VIEW_HELPER_H_