Support Epson PPD color parsing

Epson printers use the "Ink" attribute instead of other commonly used
attributes like "ColorModel".

Remove unnecessary scoping in some unit tests.

Bug: 1043255
Change-Id: I3a71c0354de266cf41b99d06372e883e8b200eb8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2014101
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Commit-Queue: Daniel Hosseinian <dhoss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#734136}

printing/backend/cups_helper.cc

@@ -31,13 +31,14 @@ namespace printing {
 // This section contains helper code for PPD parsing for semantic capabilities.
 namespace {
 
-const char kColorDevice[] = "ColorDevice";
-const char kColorModel[] = "ColorModel";
-const char kColorMode[] = "ColorMode";
-const char kProcessColorModel[] = "ProcessColorModel";
-const char kPrintoutMode[] = "PrintoutMode";
-const char kDraftGray[] = "Draft.Gray";
-const char kHighGray[] = "High.Gray";
+constexpr char kColorDevice[] = "ColorDevice";
+constexpr char kColorModel[] = "ColorModel";
+constexpr char kColorMode[] = "ColorMode";
+constexpr char kInk[] = "Ink";
+constexpr char kProcessColorModel[] = "ProcessColorModel";
+constexpr char kPrintoutMode[] = "PrintoutMode";
+constexpr char kDraftGray[] = "Draft.Gray";
+constexpr char kHighGray[] = "High.Gray";
 
 constexpr char kDuplex[] = "Duplex";
 constexpr char kDuplexNone[] = "None";
@@ -370,6 +371,32 @@ bool GetHPColorModeSettings(ppd_file_t* ppd,
   return true;
 }
 
+bool GetEpsonInkSettings(ppd_file_t* ppd,
+                         ColorModel* color_model_for_black,
+                         ColorModel* color_model_for_color,
+                         bool* color_is_default) {
+  // Epson printers use "Ink" attribute in their PPDs.
+  ppd_option_t* color_mode_option = ppdFindOption(ppd, kInk);
+  if (!color_mode_option)
+    return false;
+
+  if (ppdFindChoice(color_mode_option, kColor))
+    *color_model_for_color = EPSON_INK_COLOR;
+  if (ppdFindChoice(color_mode_option, kMono))
+    *color_model_for_black = EPSON_INK_MONO;
+
+  ppd_choice_t* mode_choice = ppdFindMarkedChoice(ppd, kInk);
+  if (!mode_choice) {
+    mode_choice =
+        ppdFindChoice(color_mode_option, color_mode_option->defchoice);
+  }
+
+  if (mode_choice) {
+    *color_is_default = EqualsCaseInsensitiveASCII(mode_choice->choice, kColor);
+  }
+  return true;
+}
+
 bool GetProcessColorModelSettings(ppd_file_t* ppd,
                                   ColorModel* color_model_for_black,
                                   ColorModel* color_model_for_color,
@@ -417,6 +444,7 @@ bool GetColorModelSettings(ppd_file_t* ppd,
          GetHPColorSettings(ppd, cm_black, cm_color, is_color) ||
          GetHPColorModeSettings(ppd, cm_black, cm_color, is_color) ||
          GetBrotherColorSettings(ppd, cm_black, cm_color, is_color) ||
+         GetEpsonInkSettings(ppd, cm_black, cm_color, is_color) ||
          GetProcessColorModelSettings(ppd, cm_black, cm_color, is_color);
 }
 

printing/backend/cups_helper_unittest.cc

@@ -319,9 +319,8 @@ TEST(PrintBackendCupsHelperTest, TestPpdParsingBrotherPrinters) {
 }
 
 TEST(PrintBackendCupsHelperTest, TestPpdParsingHpPrinters) {
-  {
-    constexpr char kTestPpdData[] =
-        R"(*PPD-Adobe: "4.3"
+  constexpr char kTestPpdData[] =
+      R"(*PPD-Adobe: "4.3"
 *ColorDevice: True
 *OpenUI *HPColorMode/Mode: PickOne
 *DefaultHPColorMode: ColorPrint
@@ -331,33 +330,52 @@ TEST(PrintBackendCupsHelperTest, TestPpdParsingHpPrinters) {
   << /ProcessColorModel /DeviceGray >> setpagedevice"
 *CloseUI: *HPColorMode)";
 
-    PrinterSemanticCapsAndDefaults caps;
-    EXPECT_TRUE(ParsePpdCapabilities("test", "", kTestPpdData, &caps));
-    EXPECT_TRUE(caps.color_changeable);
-    EXPECT_TRUE(caps.color_default);
-    EXPECT_EQ(HP_COLOR_COLOR, caps.color_model);
-    EXPECT_EQ(HP_COLOR_BLACK, caps.bw_model);
-  }
+  PrinterSemanticCapsAndDefaults caps;
+  EXPECT_TRUE(ParsePpdCapabilities("test", "", kTestPpdData, &caps));
+  EXPECT_TRUE(caps.color_changeable);
+  EXPECT_TRUE(caps.color_default);
+  EXPECT_EQ(HP_COLOR_COLOR, caps.color_model);
+  EXPECT_EQ(HP_COLOR_BLACK, caps.bw_model);
+}
+
+TEST(PrintBackendCupsHelperTest, TestPpdParsingEpsonPrinters) {
+  constexpr char kTestPpdData[] =
+      R"(*PPD-Adobe: "4.3"
+*ColorDevice: True
+*OpenUI *Ink/Ink: PickOne
+*DefaultInk: COLOR
+*Ink COLOR/Color: "
+  <</cupsBitsPerColor 8 /cupsColorOrder 0
+  /cupsColorSpace 1 /cupsCompression 1>> setpagedevice"
+*Ink MONO/Monochrome: "
+  <</cupsBitsPerColor 8 /cupsColorOrder 0
+  /cupsColorSpace 0 /cupsCompression 1>> setpagedevice"
+*CloseUI: *Ink)";
+
+  PrinterSemanticCapsAndDefaults caps;
+  EXPECT_TRUE(ParsePpdCapabilities("test", "", kTestPpdData, &caps));
+  EXPECT_TRUE(caps.color_changeable);
+  EXPECT_TRUE(caps.color_default);
+  EXPECT_EQ(EPSON_INK_COLOR, caps.color_model);
+  EXPECT_EQ(EPSON_INK_MONO, caps.bw_model);
 }
 
 TEST(PrintBackendCupsHelperTest, TestPpdParsingSamsungPrinters) {
-  {
-    constexpr char kTestPpdData[] =
-        R"(*PPD-Adobe: "4.3"
+  constexpr char kTestPpdData[] =
+      R"(*PPD-Adobe: "4.3"
 *ColorDevice: True
 *OpenUI *ColorMode/Color Mode:  Boolean
 *DefaultColorMode: True
 *ColorMode False/Grayscale: ""
 *ColorMode True/Color: ""
 *CloseUI: *ColorMode)";
 
-    PrinterSemanticCapsAndDefaults caps;
-    EXPECT_TRUE(ParsePpdCapabilities("test", "", kTestPpdData, &caps));
-    EXPECT_TRUE(caps.color_changeable);
-    EXPECT_TRUE(caps.color_default);
-    EXPECT_EQ(COLORMODE_COLOR, caps.color_model);
-    EXPECT_EQ(COLORMODE_MONOCHROME, caps.bw_model);
-  }
+  PrinterSemanticCapsAndDefaults caps;
+  EXPECT_TRUE(ParsePpdCapabilities("test", "", kTestPpdData, &caps));
+  EXPECT_TRUE(caps.color_changeable);
+  EXPECT_TRUE(caps.color_default);
+  EXPECT_EQ(COLORMODE_COLOR, caps.color_model);
+  EXPECT_EQ(COLORMODE_MONOCHROME, caps.bw_model);
 }
 
 }  // namespace printing

printing/print_job_constants.h

@@ -142,6 +142,8 @@ enum ColorModel {
   BROTHER_CUPS_MONO,            // Used in Brother color laser printer PPDs.
   BROTHER_BRSCRIPT3_COLOR,      // Used in Brother BRScript3 color printer PPDs.
   BROTHER_BRSCRIPT3_BLACK,      // Used in Brother BRScript3 color printer PPDs.
+  EPSON_INK_COLOR,              // Used in Epson printer PPDs.
+  EPSON_INK_MONO,               // Used in Epson printer PPDs.
 };
 
 // What kind of margins to use.

printing/print_settings.cc

@@ -31,13 +31,15 @@ void GetColorModelForMode(int color_mode,
   constexpr char kCUPSColorModel[] = "ColorModel";
   constexpr char kCUPSPrintoutMode[] = "PrintoutMode";
   constexpr char kCUPSProcessColorModel[] = "ProcessColorModel";
+  constexpr char kCUPSInk[] = "Ink";
   constexpr char kCUPSBrotherMonoColor[] = "BRMonoColor";
   constexpr char kCUPSBrotherPrintQuality[] = "BRPrintQuality";
 #else
   constexpr char kCUPSColorMode[] = "cups-ColorMode";
   constexpr char kCUPSColorModel[] = "cups-ColorModel";
   constexpr char kCUPSPrintoutMode[] = "cups-PrintoutMode";
   constexpr char kCUPSProcessColorModel[] = "cups-ProcessColorModel";
+  constexpr char kCUPSInk[] = "cups-Ink";
   constexpr char kCUPSBrotherMonoColor[] = "cups-BRMonoColor";
   constexpr char kCUPSBrotherPrintQuality[] = "cups-BRPrintQuality";
 #endif  // defined(OS_MACOSX)
@@ -129,6 +131,14 @@ void GetColorModelForMode(int color_mode,
       color_setting_name->assign(kCUPSBrotherPrintQuality);
       color_value->assign(kBlack);
       break;
+    case EPSON_INK_COLOR:
+      color_setting_name->assign(kCUPSInk);
+      color_value->assign(kColor);
+      break;
+    case EPSON_INK_MONO:
+      color_setting_name->assign(kCUPSInk);
+      color_value->assign(kMono);
+      break;
     default:
       color_value->assign(kGrayscale);
       break;