1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome/renderer/printing/print_web_view_helper.h" 6 7 #import <AppKit/AppKit.h> 8 9 #include "base/logging.h" 10 #include "base/mac/scoped_nsautorelease_pool.h" 11 #include "base/metrics/histogram.h" 12 #include "chrome/common/print_messages.h" 13 #include "printing/metafile.h" 14 #include "printing/metafile_impl.h" 15 #include "printing/metafile_skia_wrapper.h" 16 #include "printing/page_size_margins.h" 17 #include "skia/ext/platform_device.h" 18 #include "skia/ext/vector_canvas.h" 19 #include "third_party/WebKit/public/platform/WebCanvas.h" 20 #include "third_party/WebKit/public/web/WebLocalFrame.h" 21 22 namespace printing { 23 24 using blink::WebFrame; 25 26 void PrintWebViewHelper::PrintPageInternal( 27 const PrintMsg_PrintPage_Params& params, 28 const gfx::Size& canvas_size, 29 WebFrame* frame) { 30 NativeMetafile metafile; 31 if (!metafile.Init()) 32 return; 33 34 int page_number = params.page_number; 35 gfx::Size page_size_in_dpi; 36 gfx::Rect content_area_in_dpi; 37 RenderPage(print_pages_params_->params, page_number, frame, false, &metafile, 38 &page_size_in_dpi, &content_area_in_dpi); 39 metafile.FinishDocument(); 40 41 PrintHostMsg_DidPrintPage_Params page_params; 42 page_params.data_size = metafile.GetDataSize(); 43 page_params.page_number = page_number; 44 page_params.document_cookie = params.params.document_cookie; 45 page_params.page_size = page_size_in_dpi; 46 page_params.content_area = content_area_in_dpi; 47 48 // Ask the browser to create the shared memory for us. 49 if (!CopyMetafileDataToSharedMem(&metafile, 50 &(page_params.metafile_data_handle))) { 51 page_params.data_size = 0; 52 } 53 54 Send(new PrintHostMsg_DidPrintPage(routing_id(), page_params)); 55 } 56 57 bool PrintWebViewHelper::RenderPreviewPage( 58 int page_number, 59 const PrintMsg_Print_Params& print_params) { 60 PrintMsg_Print_Params printParams = print_params; 61 scoped_ptr<Metafile> draft_metafile; 62 Metafile* initial_render_metafile = print_preview_context_.metafile(); 63 64 bool render_to_draft = print_preview_context_.IsModifiable() && 65 is_print_ready_metafile_sent_; 66 67 if (render_to_draft) { 68 draft_metafile.reset(new PreviewMetafile()); 69 if (!draft_metafile->Init()) { 70 print_preview_context_.set_error( 71 PREVIEW_ERROR_MAC_DRAFT_METAFILE_INIT_FAILED); 72 LOG(ERROR) << "Draft PreviewMetafile Init failed"; 73 return false; 74 } 75 initial_render_metafile = draft_metafile.get(); 76 } 77 78 base::TimeTicks begin_time = base::TimeTicks::Now(); 79 gfx::Size page_size; 80 RenderPage(printParams, page_number, print_preview_context_.prepared_frame(), 81 true, initial_render_metafile, &page_size, NULL); 82 print_preview_context_.RenderedPreviewPage( 83 base::TimeTicks::Now() - begin_time); 84 85 if (draft_metafile.get()) { 86 draft_metafile->FinishDocument(); 87 } else { 88 if (print_preview_context_.IsModifiable() && 89 print_preview_context_.generate_draft_pages()) { 90 DCHECK(!draft_metafile.get()); 91 draft_metafile.reset( 92 print_preview_context_.metafile()->GetMetafileForCurrentPage()); 93 } 94 } 95 return PreviewPageRendered(page_number, draft_metafile.get()); 96 } 97 98 void PrintWebViewHelper::RenderPage( 99 const PrintMsg_Print_Params& params, int page_number, WebFrame* frame, 100 bool is_preview, Metafile* metafile, gfx::Size* page_size, 101 gfx::Rect* content_rect) { 102 double scale_factor = 1.0f; 103 double webkit_shrink_factor = frame->getPrintPageShrink(page_number); 104 PageSizeMargins page_layout_in_points; 105 gfx::Rect content_area; 106 107 ComputePageLayoutInPointsForCss(frame, page_number, params, 108 ignore_css_margins_, &scale_factor, 109 &page_layout_in_points); 110 GetPageSizeAndContentAreaFromPageLayout(page_layout_in_points, page_size, 111 &content_area); 112 if (content_rect) 113 *content_rect = content_area; 114 115 scale_factor *= webkit_shrink_factor; 116 117 gfx::Rect canvas_area = 118 params.display_header_footer ? gfx::Rect(*page_size) : content_area; 119 120 { 121 SkBaseDevice* device = metafile->StartPageForVectorCanvas( 122 *page_size, canvas_area, scale_factor); 123 if (!device) 124 return; 125 126 skia::RefPtr<skia::VectorCanvas> canvas = 127 skia::AdoptRef(new skia::VectorCanvas(device)); 128 blink::WebCanvas* canvas_ptr = canvas.get(); 129 MetafileSkiaWrapper::SetMetafileOnCanvas(*canvas, metafile); 130 skia::SetIsDraftMode(*canvas, is_print_ready_metafile_sent_); 131 skia::SetIsPreviewMetafile(*canvas, is_preview); 132 133 if (print_pages_params_->params.display_header_footer) { 134 PrintHeaderAndFooter(canvas_ptr, page_number + 1, 135 print_preview_context_.total_page_count(), 136 scale_factor, page_layout_in_points, 137 *header_footer_info_, params); 138 } 139 RenderPageContent(frame, page_number, canvas_area, content_area, 140 scale_factor, canvas_ptr); 141 } 142 143 // Done printing. Close the device context to retrieve the compiled metafile. 144 metafile->FinishPage(); 145 } 146 147 } // namespace printing 148
