Implement the basic OS-level printing mechanics on Mac

printing/printed_document.cc

Index: printing/printed_document.cc
diff --git a/printing/printed_document.cc b/printing/printed_document.cc
index e847fe5625ab8cd8ce9698a470920b756428f53a..aa9ab5b153649b1d7d3f80e259c84efa67e746d6 100644
--- a/printing/printed_document.cc
+++ b/printing/printed_document.cc
@@ -41,24 +41,6 @@ struct PrintDebugDumpPath {
 
 Singleton<PrintDebugDumpPath> g_debug_dump_info;
 
-#if defined(OS_WIN)
-void SimpleModifyWorldTransform(HDC context,
-                                int offset_x,
-                                int offset_y,
-                                double shrink_factor) {
-  XFORM xform = { 0 };
-  xform.eDx = static_cast<float>(offset_x);
-  xform.eDy = static_cast<float>(offset_y);
-  xform.eM11 = xform.eM22 = static_cast<float>(1. / shrink_factor);
-  BOOL res = ModifyWorldTransform(context, &xform, MWT_LEFTMULTIPLY);
-  DCHECK_NE(res, 0);
-}
-
-void DrawRect(HDC context, gfx::Rect rect) {
-  Rectangle(context, rect.x(), rect.y(), rect.right(), rect.bottom());
-}
-#endif  // OS_WIN
-
 }  // namespace
 
 namespace printing {
@@ -115,111 +97,8 @@ bool PrintedDocument::GetPage(int page_number,
   return false;
 }
 
-void PrintedDocument::RenderPrintedPage(const PrintedPage& page,
-                                        HDC context) const {
-#ifndef NDEBUG
-  {
-    // Make sure the page is from our list.
-    AutoLock lock(lock_);
-    DCHECK(&page == mutable_.pages_.find(page.page_number() - 1)->second.get());
-  }
-#endif
-
-#if defined(OS_WIN)
-  const printing::PageSetup& page_setup(
-      immutable_.settings_.page_setup_pixels());
-
-  // Save the state to make sure the context this function call does not modify
-  // the device context.
-  int saved_state = SaveDC(context);
-  DCHECK_NE(saved_state, 0);
-  skia::PlatformDevice::InitializeDC(context);
-  {
-    // Save the state (again) to apply the necessary world transformation.
-    int saved_state = SaveDC(context);
-    DCHECK_NE(saved_state, 0);
-
-#if 0
-    // Debug code to visually verify margins (leaks GDI handles).
-    XFORM debug_xform = { 0 };
-    ModifyWorldTransform(context, &debug_xform, MWT_IDENTITY);
-    // Printable area:
-    SelectObject(context, CreatePen(PS_SOLID, 1, RGB(0, 0, 0)));
-    SelectObject(context, CreateSolidBrush(RGB(0x90, 0x90, 0x90)));
-    Rectangle(context,
-              0,
-              0,
-              page_setup.printable_area().width(),
-              page_setup.printable_area().height());
-    // Overlay area:
-    gfx::Rect debug_overlay_area(page_setup.overlay_area());
-    debug_overlay_area.Offset(-page_setup.printable_area().x(),
-                              -page_setup.printable_area().y());
-    SelectObject(context, CreateSolidBrush(RGB(0xb0, 0xb0, 0xb0)));
-    DrawRect(context, debug_overlay_area);
-    // Content area:
-    gfx::Rect debug_content_area(page_setup.content_area());
-    debug_content_area.Offset(-page_setup.printable_area().x(),
-                              -page_setup.printable_area().y());
-    SelectObject(context, CreateSolidBrush(RGB(0xd0, 0xd0, 0xd0)));
-    DrawRect(context, debug_content_area);
-#endif
-
-    // Setup the matrix to translate and scale to the right place. Take in
-    // account the actual shrinking factor.
-    // Note that the printing output is relative to printable area of the page.
-    // That is 0,0 is offset by PHYSICALOFFSETX/Y from the page.
-    SimpleModifyWorldTransform(
-        context,
-        page_setup.content_area().x() - page_setup.printable_area().x(),
-        page_setup.content_area().y() - page_setup.printable_area().y(),
-        mutable_.shrink_factor);
-
-    if (!page.native_metafile()->SafePlayback(context)) {
-      NOTREACHED();
-    }
-
-    BOOL res = RestoreDC(context, saved_state);
-    DCHECK_NE(res, 0);
-  }
-
-  // Print the header and footer.  Offset by printable area offset (see comment
-  // above).
-  SimpleModifyWorldTransform(
-      context,
-      -page_setup.printable_area().x(),
-      -page_setup.printable_area().y(),
-      1);
-  int base_font_size = gfx::Font().height();
-  int new_font_size = ConvertUnit(10,
-                                  immutable_.settings_.desired_dpi,
-                                  immutable_.settings_.dpi());
-  DCHECK_GT(new_font_size, base_font_size);
-  gfx::Font font(gfx::Font().DeriveFont(new_font_size - base_font_size));
-  HGDIOBJ old_font = SelectObject(context, font.hfont());
-  DCHECK(old_font != NULL);
-  // We don't want a white square around the text ever if overflowing.
-  SetBkMode(context, TRANSPARENT);
-  PrintHeaderFooter(context, page, PageOverlays::LEFT, PageOverlays::TOP,
-                    font);
-  PrintHeaderFooter(context, page, PageOverlays::CENTER, PageOverlays::TOP,
-                    font);
-  PrintHeaderFooter(context, page, PageOverlays::RIGHT, PageOverlays::TOP,
-                    font);
-  PrintHeaderFooter(context, page, PageOverlays::LEFT, PageOverlays::BOTTOM,
-                    font);
-  PrintHeaderFooter(context, page, PageOverlays::CENTER, PageOverlays::BOTTOM,
-                    font);
-  PrintHeaderFooter(context, page, PageOverlays::RIGHT, PageOverlays::BOTTOM,
-                    font);
-  int res = RestoreDC(context, saved_state);
-  DCHECK_NE(res, 0);
-#else  // OS_WIN
-  NOTIMPLEMENTED();
-#endif  // OS_WIN
-}
-
-bool PrintedDocument::RenderPrintedPageNumber(int page_number, HDC context) {
+bool PrintedDocument::RenderPrintedPageNumber(
+    int page_number, gfx::NativeDrawingContext context) {
   scoped_refptr<PrintedPage> page;
   if (!GetPage(page_number, &page))
     return false;
@@ -291,7 +170,7 @@ int PrintedDocument::expected_page_count() const {
   return mutable_.expected_page_count_;
 }
 
-void PrintedDocument::PrintHeaderFooter(HDC context,
+void PrintedDocument::PrintHeaderFooter(gfx::NativeDrawingContext context,
                                         const PrintedPage& page,
                                         PageOverlays::HorizontalPosition x,
                                         PageOverlays::VerticalPosition y,
@@ -350,6 +229,8 @@ void PrintedDocument::PrintHeaderFooter(HDC context,
     }
   }
 
+  // TODO(stuartmorgan): Factor out this platform-specific part into another
+  // method that can be moved into the platform files.
 #if defined(OS_WIN)
   // Save the state (again) for the clipping region.
   int saved_state = SaveDC(context);