PrintPreview: Fix printer color settings issues based on printer ppd/schema information.

chrome/browser/printing/print_system_task_proxy.cc

Index: chrome/browser/printing/print_system_task_proxy.cc
diff --git a/chrome/browser/printing/print_system_task_proxy.cc b/chrome/browser/printing/print_system_task_proxy.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0f70253450bb376055c45af5246f32412b232d0b
--- /dev/null
+++ b/chrome/browser/printing/print_system_task_proxy.cc
@@ -0,0 +1,527 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/printing/print_system_task_proxy.h"
+
+#include <ctype.h>
+
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/metrics/histogram.h"
+#include "base/string_split.h"
+#include "base/string_util.h"
+#include "base/values.h"
+#include "printing/backend/print_backend.h"
+#include "printing/print_job_constants.h"
+
+#if defined(USE_CUPS)
+#include <cups/cups.h>
+#include <cups/ppd.h>
+
+#include "base/file_util.h"
+#endif
+
+#if defined(USE_CUPS) && !defined(OS_MACOSX)
+namespace printing_internal {
+
+void parse_lpoptions(const FilePath& filepath, const std::string& printer_name,
+                     int* num_options, cups_option_t** options) {
+  std::string content;
+  if (!file_util::ReadFileToString(filepath, &content))
+    return;
+
+  const char kDest[] = "dest";
+  const char kDefault[] = "default";
+  size_t kDestLen = sizeof(kDest) - 1;
+  size_t kDefaultLen = sizeof(kDefault) - 1;
+  std::vector <std::string> lines;
+  base::SplitString(content, '\n', &lines);
+
+  for (size_t i = 0; i < lines.size(); ++i) {
+    std::string line = lines[i];
+    if (line.empty())
+      continue;
+
+    if (base::strncasecmp (line.c_str(), kDefault, kDefaultLen) == 0 &&
+        isspace(line[kDefaultLen])) {
+      line = line.substr(kDefaultLen);
+    } else if (base::strncasecmp (line.c_str(), kDest, kDestLen) == 0 &&
+               isspace(line[kDestLen])) {
+      line = line.substr(kDestLen);
+    } else {
+      continue;
+    }
+
+    TrimWhitespaceASCII(line, TRIM_ALL, &line);
+    if (line.empty())
+      continue;
+
+    size_t space_found = line.find(' ');
+    if (space_found == std::string::npos)
+      continue;
+
+    std::string name = line.substr(0, space_found);
+    if (name.empty())
+      continue;
+
+    if (base::strncasecmp(printer_name.c_str(), name.c_str(),
+                          name.length()) != 0) {
+      continue;  // This is not the required printer.
+    }
+
+    line = line.substr(space_found + 1);
+    TrimWhitespaceASCII(line, TRIM_ALL, &line);  // Remove extra spaces.
+    if (line.empty())
+      continue;
+    // Parse the selected printer custom options.
+    *num_options = cupsParseOptions(line.c_str(), 0, options);
+  }
+}
+
+void mark_lpoptions(const std::string& printer_name, ppd_file_t** ppd) {
+  cups_option_t* options = NULL;
+  int num_options = 0;
+  ppdMarkDefaults(*ppd);
+
+  const char kSystemLpOptionPath[] = "/etc/cups/lpoptions";
+  const char kUserLpOptionPath[] = ".cups/lpoptions";
+
+  std::vector<FilePath> file_locations;
+  file_locations.push_back(FilePath(kSystemLpOptionPath));
+  file_locations.push_back(FilePath(
+      file_util::GetHomeDir().Append(kUserLpOptionPath)));
+
+  for (std::vector<FilePath>::const_iterator it = file_locations.begin();
+       it != file_locations.end(); ++it) {
+    num_options = 0;
+    options = NULL;
+    parse_lpoptions(*it, printer_name, &num_options, &options);
+    if (num_options > 0 && options) {
+      cupsMarkOptions(*ppd, num_options, options);
+      cupsFreeOptions(num_options, options);
+    }
+  }
+}
+
+}  // printing_internal namespace
+#endif
+
+namespace {
+
+const char kDisableColorOption[] = "disableColorOption";
+const char kSetColorAsDefault[] = "setColorAsDefault";
+const char kSetDuplexAsDefault[] = "setDuplexAsDefault";
+const char kPrinterColorModelForBlack[] = "printerColorModelForBlack";
+const char kPrinterColorModelForColor[] = "printerColorModelForColor";
+const char kPrinterDefaultDuplexValue[] = "printerDefaultDuplexValue";
+
+#if defined(USE_CUPS)
+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";
+
+const char kDuplex[] = "Duplex";
+const char kDuplexNone[] = "None";
+
+void getBasicColorModelSettings(
+    ppd_file_t* ppd, int* color_model_for_black, int* color_model_for_color,
+    bool* color_is_default) {
+  ppd_option_t* color_model = ppdFindOption(ppd, kColorModel);
+  if (ppdFindChoice(color_model, printing::kBlack))
+    *color_model_for_black = printing::BLACK;
+  else if (ppdFindChoice(color_model, printing::kGray))
+    *color_model_for_black = printing::GRAY;
+
+  if (ppdFindChoice(color_model, printing::kColor))
+    *color_model_for_color = printing::COLOR;
+  else if (ppdFindChoice(color_model, printing::kCMYK))
+    *color_model_for_color = printing::CMYK;
+  else if (ppdFindChoice(color_model, printing::kRGB))
+    *color_model_for_color = printing::RGB;
+  else if (ppdFindChoice(color_model, printing::kRGBA))
+    *color_model_for_color = printing::RGBA;
+  else if (ppdFindChoice(color_model, printing::kRGB16))
+    *color_model_for_color = printing::RGB16;
+  else if (ppdFindChoice(color_model, printing::kCMY))
+    *color_model_for_color = printing::CMY;
+  else if (ppdFindChoice(color_model, printing::kKCMY))
+    *color_model_for_color = printing::KCMY;
+  else if (ppdFindChoice(color_model, printing::kCMY_K))
+    *color_model_for_color = printing::CMY_K;
+
+  ppd_choice_t* marked_choice = ppdFindMarkedChoice(ppd, kColorModel);
+  if (!marked_choice)
+    marked_choice = ppdFindChoice(color_model, color_model->defchoice);
+
+  if (marked_choice) {
+    *color_is_default =
+        (base::strcasecmp(marked_choice->choice, printing::kBlack) != 0) &&
+        (base::strcasecmp(marked_choice->choice, printing::kGray) != 0);
+  }
+}
+
+void getPrintOutModeColorSettings(
+    ppd_file_t* ppd, int* color_model_for_black, int* color_model_for_color,
+    bool* color_is_default) {
+  ppd_option_t* printout_mode = ppdFindOption(ppd, kPrintoutMode);
+  *color_model_for_color = printing::PRINTOUTMODE_NORMAL;
+  *color_model_for_black = printing::PRINTOUTMODE_NORMAL;
+
+  // Check to see if NORMAL_GRAY value is supported by PrintoutMode.
+  // If NORMAL_GRAY is not supported, NORMAL value is used to
+  // represent grayscale. If NORMAL_GRAY is supported, NORMAL is used to
+  // represent color.
+  if (ppdFindChoice(printout_mode, printing::kNormalGray))
+    *color_model_for_black = printing::PRINTOUTMODE_NORMAL_GRAY;
+
+  // Get the default marked choice to identify the default color setting
+  // value.
+  ppd_choice_t* printout_mode_choice = ppdFindMarkedChoice(ppd, kPrintoutMode);
+  if (!printout_mode_choice) {
+      printout_mode_choice = ppdFindChoice(printout_mode,
+                                           printout_mode->defchoice);
+  }
+  if (printout_mode_choice) {
+    if ((base::strcasecmp(printout_mode_choice->choice,
+                          printing::kNormalGray) == 0) ||
+        (base::strcasecmp(printout_mode_choice->choice, kHighGray) == 0) ||
+        (base::strcasecmp(printout_mode_choice->choice, kDraftGray) == 0)) {
+      *color_model_for_black = printing::PRINTOUTMODE_NORMAL_GRAY;
+      *color_is_default = false;
+    }
+  }
+}
+
+void getColorModeSettings(
+    ppd_file_t* ppd, int* color_model_for_black, int* color_model_for_color,
+    bool* color_is_default) {
+  // Samsung printers use "ColorMode" attribute in their ppds.
+  ppd_option_t* color_mode_option = ppdFindOption(ppd, kColorMode);
+  if (ppdFindChoice(color_mode_option, printing::kColor))
+    *color_model_for_color = printing::COLORMODE_COLOR;
+
+  if (ppdFindChoice(color_mode_option, printing::kMonochrome))
+    *color_model_for_black = printing::COLORMODE_MONOCHROME;
+
+  ppd_choice_t* mode_choice = ppdFindMarkedChoice(ppd, kColorMode);
+  if (!mode_choice) {
+    mode_choice = ppdFindChoice(color_mode_option,
+                                color_mode_option->defchoice);
+  }
+
+  if (mode_choice) {
+    *color_is_default =
+        (base::strcasecmp(mode_choice->choice, printing::kColor) == 0);
+  }
+}
+
+void getHPColorSettings(
+    ppd_file_t* ppd, int* color_model_for_black, int* color_model_for_color,
+    bool* color_is_default) {
+  // HP printers use "Color/Color Model" attribute in their ppds.
+  ppd_option_t* color_mode_option = ppdFindOption(ppd, printing::kColor);
+  if (ppdFindChoice(color_mode_option, printing::kColor))
+    *color_model_for_color = printing::HP_COLOR_COLOR;
+  if (ppdFindChoice(color_mode_option, printing::kBlack))
+    *color_model_for_black = printing::HP_COLOR_BLACK;
+
+  ppd_choice_t* mode_choice = ppdFindMarkedChoice(ppd, kColorMode);
+  if (!mode_choice) {
+    mode_choice = ppdFindChoice(color_mode_option,
+                                color_mode_option->defchoice);
+  }
+  if (mode_choice) {
+    *color_is_default =
+        (base::strcasecmp(mode_choice->choice, printing::kColor) == 0);
+  }
+}
+
+void getProcessColorModelSettings(
+    ppd_file_t* ppd, int* color_model_for_black, int* color_model_for_color,
+    bool* color_is_default) {
+  // Canon printers use "ProcessColorModel" attribute in their ppds.
+  ppd_option_t* color_mode_option =  ppdFindOption(ppd, kProcessColorModel);
+  if (ppdFindChoice(color_mode_option, printing::kRGB))
+    *color_model_for_color = printing::PROCESSCOLORMODEL_RGB;
+  else if (ppdFindChoice(color_mode_option, printing::kCMYK))
+    *color_model_for_color = printing::PROCESSCOLORMODEL_CMYK;
+
+  if (ppdFindChoice(color_mode_option, printing::kGreyscale))
+    *color_model_for_black = printing::PROCESSCOLORMODEL_GREYSCALE;
+
+  ppd_choice_t* mode_choice = ppdFindMarkedChoice(ppd, kProcessColorModel);
+  if (!mode_choice) {
+    mode_choice = ppdFindChoice(color_mode_option,
+                                color_mode_option->defchoice);
+  }
+
+  if (mode_choice) {
+    *color_is_default =
+        (base::strcasecmp(mode_choice->choice, printing::kGreyscale) != 0);
+  }
+}
+#elif defined(OS_WIN)
+const char kPskColor[] = "psk:Color";

[vandebo (ex-Chrome), 2011/10/11 19:11:42]

Consider putting this block first since it is much shorter than the other block.

[kmadhusu, 2011/10/11 21:36:03]

Done.

+const char kPskGray[] = "psk:Grayscale";
+const char kPskMonochrome[] = "psk:Monochrome";
+const char kPskDuplexFeature[] = "psk:JobDuplexAllDocumentsContiguously";
+const char kPskTwoSided[] = "psk:TwoSided";
+#endif
+
+}  // namespace
+
+PrintSystemTaskProxy::PrintSystemTaskProxy(
+    const base::WeakPtr<PrintPreviewHandler>& handler,
+    printing::PrintBackend* print_backend,
+    bool has_logged_printers_count)
+    : handler_(handler),
+      print_backend_(print_backend),
+      has_logged_printers_count_(has_logged_printers_count) {
+}
+
+PrintSystemTaskProxy::~PrintSystemTaskProxy() {
+}
+
+void PrintSystemTaskProxy::GetDefaultPrinter() {
+  VLOG(1) << "Get default printer start";
+  StringValue* default_printer = NULL;
+  if (PrintPreviewHandler::last_used_printer_name_ == NULL) {
+    default_printer = new StringValue(
+        print_backend_->GetDefaultPrinterName());
+  } else {
+    default_printer = new StringValue(
+        *PrintPreviewHandler::last_used_printer_name_);
+  }
+  std::string default_printer_string;
+  default_printer->GetAsString(&default_printer_string);
+  VLOG(1) << "Get default printer finished, found: "
+          << default_printer_string;
+
+  StringValue* cloud_print_data = NULL;
+  if (PrintPreviewHandler::last_used_printer_cloud_print_data_ != NULL) {
+    cloud_print_data = new StringValue(
+        *PrintPreviewHandler::last_used_printer_cloud_print_data_);
+  } else {
+    cloud_print_data = new StringValue("");
+  }
+
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&PrintSystemTaskProxy::SendDefaultPrinter, this,
+                 default_printer, cloud_print_data));
+}
+
+void PrintSystemTaskProxy::SendDefaultPrinter(
+    const StringValue* default_printer, const StringValue* cloud_print_data) {
+  if (handler_)
+    handler_->SendDefaultPrinter(*default_printer, *cloud_print_data);
+  delete default_printer;
+}
+
+void PrintSystemTaskProxy::EnumeratePrinters() {
+  VLOG(1) << "Enumerate printers start";
+  ListValue* printers = new ListValue;
+  printing::PrinterList printer_list;
+  print_backend_->EnumeratePrinters(&printer_list);
+
+  if (!has_logged_printers_count_) {
+    // Record the total number of printers.
+    UMA_HISTOGRAM_COUNTS("PrintPreview.NumberOfPrinters",
+                         printer_list.size());
+  }
+  int i = 0;
+  for (printing::PrinterList::iterator iter = printer_list.begin();
+       iter != printer_list.end(); ++iter, ++i) {
+    DictionaryValue* printer_info = new DictionaryValue;
+    std::string printerName;
+#if defined(OS_MACOSX)
+    // On Mac, |iter->printer_description| specifies the printer name and
+    // |iter->printer_name| specifies the device name / printer queue name.
+    printerName = iter->printer_description;
+#else
+    printerName = iter->printer_name;
+#endif
+    printer_info->SetString(printing::kSettingPrinterName, printerName);
+    printer_info->SetString(printing::kSettingDeviceName, iter->printer_name);
+    printers->Append(printer_info);
+  }
+  VLOG(1) << "Enumerate printers finished, found " << i << " printers";
+
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&PrintSystemTaskProxy::SetupPrinterList, this, printers));
+}
+
+void PrintSystemTaskProxy::SetupPrinterList(ListValue* printers) {
+  if (handler_)
+    handler_->SetupPrinterList(*printers);
+  delete printers;
+}
+
+void PrintSystemTaskProxy::GetPrinterCapabilities(
+    const std::string& printer_name) {
+  VLOG(1) << "Get printer capabilities start for " << printer_name;
+  printing::PrinterCapsAndDefaults printer_info;
+
+  bool set_color_as_default = false;
+  bool disable_color_options = true;
+  bool set_duplex_as_default = false;
+  int printer_color_space_for_color = printing::UNKNOWN_COLOR_MODEL;
+  int printer_color_space_for_black = printing::UNKNOWN_COLOR_MODEL;
+  int default_duplex_setting_value = printing::UNKNOWN_DUPLEX_MODE;
+  if (!print_backend_->GetPrinterCapsAndDefaults(printer_name,
+                                                 &printer_info)) {
+    return;
+  }
+
+#if defined(USE_CUPS)
+  FilePath ppd_file_path;
+  if (!file_util::CreateTemporaryFile(&ppd_file_path))
+    return;
+
+  int data_size = printer_info.printer_capabilities.length();
+  if (data_size != file_util::WriteFile(
+                       ppd_file_path,
+                       printer_info.printer_capabilities.data(),
+                       data_size)) {
+    file_util::Delete(ppd_file_path, false);
+    return;
+  }
+
+  ppd_file_t* ppd = ppdOpenFile(ppd_file_path.value().c_str());
+  if (ppd) {
+#if !defined(OS_MACOSX)
+    printing_internal::mark_lpoptions(printer_name, &ppd);
+#endif
+    bool is_color_device = false;

[vandebo (ex-Chrome), 2011/10/11 19:11:42]

consider moving this block down to 425, so all the color code is together.

[kmadhusu, 2011/10/11 21:36:03]

Done.

+    ppd_attr_t* attr = ppdFindAttr(ppd, kColorDevice, NULL);
+    if (attr && attr->value)
+      is_color_device = ppd->color_device;
+    disable_color_options = !is_color_device;
+
+    ppd_choice_t* duplex_choice = ppdFindMarkedChoice(ppd, kDuplex);
+    if (duplex_choice) {
+      ppd_option_t* option = ppdFindOption(ppd, kDuplex);
+      if (option)
+        duplex_choice = ppdFindChoice(option, option->defchoice);
+    }
+
+    if (duplex_choice) {
+      if (base::strcasecmp(duplex_choice->choice, kDuplexNone) != 0) {
+        set_duplex_as_default = true;
+        default_duplex_setting_value = printing::LONG_EDGE;
+      } else {
+        default_duplex_setting_value = printing::SIMPLEX;
+      }
+    }
+
+    set_color_as_default = is_color_device;
+
+    if (is_color_device && ppdFindOption(ppd, kColorModel)) {

[kmadhusu, 2011/10/10 23:34:26]

All the data members and member functions of this class are moved from
print_preview_handler.cc. 

Please review the new helper functions(getBasicColorModelSettings,
getPrintOutModeColorSettings, getColorModeSettings, getHPColorSettings and
getProcessColorModelSettings) and lines 427 - 512. 

[vandebo (ex-Chrome), 2011/10/11 19:11:42]

Hmm, this structure ends up calling ppdFindOption twice for each of the
different option styles.  I think you could express the same sentiment at this
level with a slightly clever trick:  make each of the methods return true/false
if they processed the result/didn't.  Then make this a single line:
getBasicColorModelSettings(...) ||
getPrintOutModeColorSettings(...) ||
...

[kmadhusu, 2011/10/11 21:36:03]

Done.

+      getBasicColorModelSettings(
+          ppd, &printer_color_space_for_black, &printer_color_space_for_color,
+          &set_color_as_default);
+    } else if (ppdFindOption(ppd, kPrintoutMode)) {
+      getPrintOutModeColorSettings(
+          ppd, &printer_color_space_for_black, &printer_color_space_for_color,
+          &set_color_as_default);
+    } else if (ppdFindOption(ppd, kColorMode)) {
+      getColorModeSettings(
+          ppd, &printer_color_space_for_black, &printer_color_space_for_color,
+          &set_color_as_default);
+    } else if (ppdFindOption(ppd, printing::kColor)) {
+      getHPColorSettings(
+          ppd, &printer_color_space_for_black, &printer_color_space_for_color,
+          &set_color_as_default);
+    } else if (ppdFindOption(ppd, kProcessColorModel)) {
+      getProcessColorModelSettings(
+          ppd, &printer_color_space_for_black, &printer_color_space_for_color,
+          &set_color_as_default);
+    }
+    ppdClose(ppd);
+  }
+  file_util::Delete(ppd_file_path, false);
+#elif defined(OS_WIN)
+  // According to XPS 1.0 spec, only color printers have psk:Color.
+  // Therefore we don't need to parse the whole XML file, we just need to
+  // search the string.  The spec can be found at:
+  // http://msdn.microsoft.com/en-us/windows/hardware/gg463431.
+  if (printer_info.printer_capabilities.find(kPskColor) != std::string::npos)
+    printer_color_space_for_color = printing::COLOR;
+
+  if ((printer_info.printer_capabilities.find(kPskGray) !=
+          std::string::npos) ||
+      (printer_info.printer_capabilities.find(kPskMonochrome) !=
+          std::string::npos)) {
+    printer_color_space_for_black = printing::GRAY;
+  }
+
+  set_duplex_as_default =
+      (printer_info.printer_defaults.find(kPskDuplexFeature) !=
+          std::string::npos) &&
+      (printer_info.printer_defaults.find(kPskTwoSided) !=
+          std::string::npos);
+
+  if (printer_info.printer_defaults.find(kPskDuplexFeature) !=
+          std::string::npos) {
+      if (printer_info.printer_defaults.find(kPskTwoSided) !=
+              std::string::npos) {
+        default_duplex_setting_value = printing::LONG_EDGE;
+      } else {
+        default_duplex_setting_value = printing::SIMPLEX;
+    }
+  }
+  set_color_as_default =

[vandebo (ex-Chrome), 2011/10/11 19:11:42]

move with the other color code.

[kmadhusu, 2011/10/11 21:36:03]

Done.

+      (printer_info.printer_defaults.find(kPskColor) != std::string::npos);
+#else
+  NOTIMPLEMENTED();
+#endif
+  disable_color_options = !printer_color_space_for_color ||
+                          !printer_color_space_for_black ||
+                          (printer_color_space_for_color ==
+                           printer_color_space_for_black);
+
+  DictionaryValue settings_info;
+  settings_info.SetBoolean(kDisableColorOption, disable_color_options);
+  if (printer_color_space_for_color == printing::UNKNOWN_COLOR_MODEL)
+    printer_color_space_for_color = printing::COLOR;
+
+  if (printer_color_space_for_black == printing::UNKNOWN_COLOR_MODEL)
+    printer_color_space_for_black = printing::GRAY;
+
+  if (disable_color_options ||
+      PrintPreviewHandler::last_used_color_model_ ==
+          printing::UNKNOWN_COLOR_MODEL) {
+    settings_info.SetBoolean(kSetColorAsDefault, set_color_as_default);
+  } else {
+    settings_info.SetBoolean(kSetColorAsDefault,
+                             printing::isColorModelSelected(
+                                 PrintPreviewHandler::last_used_color_model_));
+  }
+
+  settings_info.SetBoolean(kSetDuplexAsDefault, set_duplex_as_default);
+  settings_info.SetInteger(kPrinterColorModelForColor,
+                           printer_color_space_for_color);
+  settings_info.SetInteger(kPrinterColorModelForBlack,
+                           printer_color_space_for_black);
+  settings_info.SetInteger(kPrinterDefaultDuplexValue,
+                           default_duplex_setting_value);
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&PrintSystemTaskProxy::SendPrinterCapabilities, this,
+                 settings_info.DeepCopy()));
+}
+
+void PrintSystemTaskProxy::SendPrinterCapabilities(
+    DictionaryValue* settings_info) {
+  if (handler_)
+    handler_->SendPrinterCapabilities(*settings_info);
+  delete settings_info;
+}