Print Preview: Get printer info with capabilities.

printing/backend/print_backend.h

Index: printing/backend/print_backend.h
diff --git a/printing/backend/print_backend.h b/printing/backend/print_backend.h
index 56e357542469308bde7907f9988b900c6fa45086..5086d2047346f111cdd7ba5ed8bb94a0c5c2a9a1 100644
--- a/printing/backend/print_backend.h
+++ b/printing/backend/print_backend.h
@@ -21,6 +21,8 @@ class DictionaryValue;
 // This is the interface for platform-specific code for a print backend
 namespace printing {
 
+// Note: There are raw values. The |printer_name| and |printer_description|
+// require further interpretation on Mac. See existing callers for examples.
 struct PRINTING_EXPORT PrinterBasicInfo {
   PrinterBasicInfo();
   PrinterBasicInfo(const PrinterBasicInfo& other);
@@ -33,7 +35,7 @@ struct PRINTING_EXPORT PrinterBasicInfo {
   std::map<std::string, std::string> options;
 };
 
-typedef std::vector<PrinterBasicInfo> PrinterList;
+using PrinterList = std::vector<PrinterBasicInfo>;
 
 struct PRINTING_EXPORT PrinterSemanticCapsAndDefaults {
   PrinterSemanticCapsAndDefaults();
@@ -89,9 +91,13 @@ class PRINTING_EXPORT PrintBackend
   // Enumerates the list of installed local and network printers.
   virtual bool EnumeratePrinters(PrinterList* printer_list) = 0;
 
-  // Get the default printer name. Empty string if no default printer.
+  // Gets the default printer name. Empty string if no default printer.
   virtual std::string GetDefaultPrinterName() = 0;
 
+  // Gets the basic printer info for a specific printer.
+  virtual bool GetPrinterBasicInfo(const std::string& printer_name,
+                                   PrinterBasicInfo* printer_info) = 0;
+
   // Gets the semantic capabilities and defaults for a specific printer.
   // This is usually a lighter implementation than GetPrinterCapsAndDefaults().
   // NOTE: on some old platforms (WinXP without XPS pack)
@@ -112,7 +118,7 @@ class PRINTING_EXPORT PrintBackend
   // Returns true if printer_name points to a valid printer.
   virtual bool IsValidPrinter(const std::string& printer_name) = 0;
 
-  // Allocate a print backend. If |print_backend_settings| is NULL, default
+  // Allocates a print backend. If |print_backend_settings| is nullptr, default
   // settings will be used.
   static scoped_refptr<PrintBackend> CreateInstance(
       const base::DictionaryValue* print_backend_settings);