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| 1 // Copyright 2014 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 #include "base/logging.h" | |
| 8 #include "base/memory/scoped_ptr.h" | |
| 9 #include "base/process/process_handle.h" | |
| 10 #include "chrome/common/print_messages.h" | |
| 11 #include "content/public/renderer/render_thread.h" | |
| 12 #include "printing/metafile_skia_wrapper.h" | |
| 13 #include "printing/page_size_margins.h" | |
| 14 #include "printing/pdf_metafile_skia.h" | |
| 15 #include "printing/units.h" | |
| 16 #include "skia/ext/platform_device.h" | |
| 17 #include "skia/ext/vector_canvas.h" | |
| 18 #include "third_party/WebKit/public/web/WebLocalFrame.h" | |
| 19 | |
| 20 | |
| 21 namespace printing { | |
| 22 | |
| 23 using blink::WebFrame; | |
| 24 | |
| 25 bool PrintWebViewHelper::RenderPreviewPage( | |
| 26 int page_number, | |
| 27 const PrintMsg_Print_Params& print_params) { | |
| 28 PrintMsg_PrintPage_Params page_params; | |
| 29 page_params.params = print_params; | |
| 30 page_params.page_number = page_number; | |
| 31 scoped_ptr<PdfMetafileSkia> draft_metafile; | |
| 32 PdfMetafileSkia* initial_render_metafile = print_preview_context_.metafile(); | |
| 33 if (print_preview_context_.IsModifiable() && is_print_ready_metafile_sent_) { | |
| 34 draft_metafile.reset(new PdfMetafileSkia); | |
| 35 initial_render_metafile = draft_metafile.get(); | |
| 36 } | |
| 37 | |
| 38 base::TimeTicks begin_time = base::TimeTicks::Now(); | |
| 39 PrintPageInternal(page_params, | |
| 40 print_preview_context_.prepared_frame(), | |
| 41 initial_render_metafile, | |
| 42 NULL, | |
| 43 NULL); | |
| 44 print_preview_context_.RenderedPreviewPage( | |
| 45 base::TimeTicks::Now() - begin_time); | |
| 46 if (draft_metafile.get()) { | |
| 47 draft_metafile->FinishDocument(); | |
| 48 } else if (print_preview_context_.IsModifiable() && | |
| 49 print_preview_context_.generate_draft_pages()) { | |
| 50 DCHECK(!draft_metafile.get()); | |
| 51 draft_metafile = | |
| 52 print_preview_context_.metafile()->GetMetafileForCurrentPage(); | |
| 53 } | |
| 54 return PreviewPageRendered(page_number, draft_metafile.get()); | |
| 55 } | |
| 56 | |
| 57 bool PrintWebViewHelper::PrintPagesNative(blink::WebFrame* frame, | |
| 58 int page_count) { | |
| 59 PdfMetafileSkia metafile; | |
| 60 if (!metafile.Init()) | |
| 61 return false; | |
| 62 | |
| 63 const PrintMsg_PrintPages_Params& params = *print_pages_params_; | |
| 64 std::vector<int> printed_pages; | |
| 65 if (params.pages.empty()) { | |
| 66 for (int i = 0; i < page_count; ++i) { | |
| 67 printed_pages.push_back(i); | |
| 68 } | |
| 69 } else { | |
| 70 // TODO(vitalybuka): redesign to make more code cross platform. | |
| 71 for (size_t i = 0; i < params.pages.size(); ++i) { | |
| 72 if (params.pages[i] >= 0 && params.pages[i] < page_count) { | |
| 73 printed_pages.push_back(params.pages[i]); | |
| 74 } | |
| 75 } | |
| 76 } | |
| 77 if (printed_pages.empty()) | |
| 78 return false; | |
| 79 | |
| 80 std::vector<gfx::Size> page_size_in_dpi(printed_pages.size()); | |
| 81 std::vector<gfx::Rect> content_area_in_dpi(printed_pages.size()); | |
| 82 | |
| 83 PrintMsg_PrintPage_Params page_params; | |
| 84 page_params.params = params.params; | |
| 85 for (size_t i = 0; i < printed_pages.size(); ++i) { | |
| 86 page_params.page_number = printed_pages[i]; | |
| 87 PrintPageInternal(page_params, | |
| 88 frame, | |
| 89 &metafile, | |
| 90 &page_size_in_dpi[i], | |
| 91 &content_area_in_dpi[i]); | |
| 92 } | |
| 93 | |
| 94 // blink::printEnd() for PDF should be called before metafile is closed. | |
| 95 FinishFramePrinting(); | |
| 96 | |
| 97 metafile.FinishDocument(); | |
| 98 | |
| 99 // Get the size of the resulting metafile. | |
| 100 uint32 buf_size = metafile.GetDataSize(); | |
| 101 DCHECK_GT(buf_size, 0u); | |
| 102 | |
| 103 PrintHostMsg_DidPrintPage_Params printed_page_params; | |
| 104 printed_page_params.data_size = 0; | |
| 105 printed_page_params.document_cookie = params.params.document_cookie; | |
| 106 printed_page_params.page_size = params.params.page_size; | |
| 107 printed_page_params.content_area = params.params.printable_area; | |
| 108 | |
| 109 { | |
| 110 base::SharedMemory shared_buf; | |
| 111 // Allocate a shared memory buffer to hold the generated metafile data. | |
| 112 if (!shared_buf.CreateAndMapAnonymous(buf_size)) { | |
| 113 NOTREACHED() << "Buffer allocation failed"; | |
| 114 return false; | |
| 115 } | |
| 116 | |
| 117 // Copy the bits into shared memory. | |
| 118 if (!metafile.GetData(shared_buf.memory(), buf_size)) { | |
| 119 NOTREACHED() << "GetData() failed"; | |
| 120 shared_buf.Unmap(); | |
| 121 return false; | |
| 122 } | |
| 123 shared_buf.GiveToProcess(base::GetCurrentProcessHandle(), | |
| 124 &printed_page_params.metafile_data_handle); | |
| 125 shared_buf.Unmap(); | |
| 126 | |
| 127 printed_page_params.data_size = buf_size; | |
| 128 Send(new PrintHostMsg_DuplicateSection( | |
| 129 routing_id(), | |
| 130 printed_page_params.metafile_data_handle, | |
| 131 &printed_page_params.metafile_data_handle)); | |
| 132 } | |
| 133 | |
| 134 for (size_t i = 0; i < printed_pages.size(); ++i) { | |
| 135 printed_page_params.page_number = printed_pages[i]; | |
| 136 printed_page_params.page_size = page_size_in_dpi[i]; | |
| 137 printed_page_params.content_area = content_area_in_dpi[i]; | |
| 138 Send(new PrintHostMsg_DidPrintPage(routing_id(), printed_page_params)); | |
| 139 printed_page_params.metafile_data_handle = INVALID_HANDLE_VALUE; | |
| 140 } | |
| 141 return true; | |
| 142 } | |
| 143 | |
| 144 void PrintWebViewHelper::PrintPageInternal( | |
| 145 const PrintMsg_PrintPage_Params& params, | |
| 146 WebFrame* frame, | |
| 147 PdfMetafileSkia* metafile, | |
| 148 gfx::Size* page_size_in_dpi, | |
| 149 gfx::Rect* content_area_in_dpi) { | |
| 150 PageSizeMargins page_layout_in_points; | |
| 151 double css_scale_factor = 1.0f; | |
| 152 ComputePageLayoutInPointsForCss(frame, params.page_number, params.params, | |
| 153 ignore_css_margins_, &css_scale_factor, | |
| 154 &page_layout_in_points); | |
| 155 gfx::Size page_size; | |
| 156 gfx::Rect content_area; | |
| 157 GetPageSizeAndContentAreaFromPageLayout(page_layout_in_points, &page_size, | |
| 158 &content_area); | |
| 159 int dpi = static_cast<int>(params.params.dpi); | |
| 160 // Calculate the actual page size and content area in dpi. | |
| 161 if (page_size_in_dpi) { | |
| 162 *page_size_in_dpi = | |
| 163 gfx::Size(static_cast<int>(ConvertUnitDouble( | |
| 164 page_size.width(), kPointsPerInch, dpi)), | |
| 165 static_cast<int>(ConvertUnitDouble( | |
| 166 page_size.height(), kPointsPerInch, dpi))); | |
| 167 } | |
| 168 | |
| 169 if (content_area_in_dpi) { | |
| 170 // Output PDF matches paper size and should be printer edge to edge. | |
| 171 *content_area_in_dpi = | |
| 172 gfx::Rect(0, 0, page_size_in_dpi->width(), page_size_in_dpi->height()); | |
| 173 } | |
| 174 | |
| 175 gfx::Rect canvas_area = | |
| 176 params.params.display_header_footer ? gfx::Rect(page_size) : content_area; | |
| 177 | |
| 178 float webkit_page_shrink_factor = | |
| 179 frame->getPrintPageShrink(params.page_number); | |
| 180 float scale_factor = css_scale_factor * webkit_page_shrink_factor; | |
| 181 | |
| 182 skia::VectorCanvas* canvas = | |
| 183 metafile->GetVectorCanvasForNewPage(page_size, canvas_area, scale_factor); | |
| 184 if (!canvas) | |
| 185 return; | |
| 186 | |
| 187 MetafileSkiaWrapper::SetMetafileOnCanvas(*canvas, metafile); | |
| 188 skia::SetIsDraftMode(*canvas, is_print_ready_metafile_sent_); | |
| 189 | |
| 190 #if defined(ENABLE_PRINT_PREVIEW) | |
| 191 if (params.params.display_header_footer) { | |
| 192 // |page_number| is 0-based, so 1 is added. | |
| 193 PrintHeaderAndFooter(canvas, params.page_number + 1, | |
| 194 print_preview_context_.total_page_count(), *frame, | |
| 195 scale_factor, page_layout_in_points, params.params); | |
| 196 } | |
| 197 #endif // defined(ENABLE_PRINT_PREVIEW) | |
| 198 | |
| 199 float webkit_scale_factor = | |
| 200 RenderPageContent(frame, params.page_number, canvas_area, content_area, | |
| 201 scale_factor, canvas); | |
| 202 DCHECK_GT(webkit_scale_factor, 0.0f); | |
| 203 // Done printing. Close the canvas to retrieve the compiled metafile. | |
| 204 if (!metafile->FinishPage()) | |
| 205 NOTREACHED() << "metafile failed"; | |
| 206 } | |
| 207 | |
| 208 bool PrintWebViewHelper::CopyMetafileDataToSharedMem( | |
| 209 PdfMetafileSkia* metafile, | |
| 210 base::SharedMemoryHandle* shared_mem_handle) { | |
| 211 uint32 buf_size = metafile->GetDataSize(); | |
| 212 base::SharedMemory shared_buf; | |
| 213 // Allocate a shared memory buffer to hold the generated metafile data. | |
| 214 if (!shared_buf.CreateAndMapAnonymous(buf_size)) { | |
| 215 NOTREACHED() << "Buffer allocation failed"; | |
| 216 return false; | |
| 217 } | |
| 218 | |
| 219 // Copy the bits into shared memory. | |
| 220 if (!metafile->GetData(shared_buf.memory(), buf_size)) { | |
| 221 NOTREACHED() << "GetData() failed"; | |
| 222 shared_buf.Unmap(); | |
| 223 return false; | |
| 224 } | |
| 225 shared_buf.GiveToProcess(base::GetCurrentProcessHandle(), shared_mem_handle); | |
| 226 shared_buf.Unmap(); | |
| 227 | |
| 228 Send(new PrintHostMsg_DuplicateSection(routing_id(), *shared_mem_handle, | |
| 229 shared_mem_handle)); | |
| 230 return true; | |
| 231 } | |
| 232 | |
| 233 } // namespace printing | |
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Chromium Code Reviews
Issue 811563008:
Moving files from //chrome to //components/printing (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master