Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 181 insertions, 0 deletions

diff --git a/widget/nsPrinterCUPS.h b/widget/nsPrinterCUPS.h
new file mode 100644
index 0000000000..3ecf1cb982
--- /dev/null
+++ b/widget/nsPrinterCUPS.h
@@ -0,0 +1,181 @@
+/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 2; -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsPrinterCUPS_h___
+#define nsPrinterCUPS_h___
+
+#include "nsPrinterBase.h"
+#include "nsPrintSettingsImpl.h"
+#include "nsCUPSShim.h"
+#include "nsString.h"
+
+#include "mozilla/DataMutex.h"
+#include "mozilla/FunctionRef.h"
+#include "mozilla/RecursiveMutex.h"
+
+/**
+ * @brief Interface to help implementing nsIPrinter using a CUPS printer.
+ */
+class nsPrinterCUPS final : public nsPrinterBase {
+ public:
+  NS_IMETHOD GetName(nsAString& aName) override;
+  NS_IMETHOD GetSystemName(nsAString& aName) override;
+  bool SupportsDuplex() const final;
+  bool SupportsColor() const final;
+  bool SupportsMonochrome() const final;
+  bool SupportsCollation() const final;
+  PrinterInfo CreatePrinterInfo() const final;
+  MarginDouble GetMarginsForPaper(nsString aPaperId) const final {
+    MOZ_ASSERT_UNREACHABLE(
+        "The CUPS API requires us to always get the margin when fetching the "
+        "paper list so there should be no need to query it separately");
+    return {};
+  }
+
+  nsPrinterCUPS() = delete;
+
+  nsPrinterCUPS(const mozilla::CommonPaperInfoArray* aArray,
+                const nsCUPSShim& aShim, nsString aDisplayName,
+                cups_dest_t* aPrinter)
+      : nsPrinterBase(aArray),
+        mShim(aShim),
+        mDisplayName(std::move(aDisplayName)),
+        mPrinterInfoMutex(CUPSPrinterInfo{aPrinter},
+                          "nsPrinterCUPS::mPrinterInfoMutex") {}
+
+  static void ForEachExtraMonochromeSetting(
+      mozilla::FunctionRef<void(const nsACString&, const nsACString&)>);
+
+ private:
+  struct CUPSPrinterInfo {
+    explicit constexpr CUPSPrinterInfo(cups_dest_t* aPrinter)
+        : mPrinter(aPrinter) {}
+    cups_dest_t* mPrinter;
+    cups_dinfo_t* mPrinterInfo = nullptr;
+    uint64_t mCUPSMajor = 0;
+    uint64_t mCUPSMinor = 0;
+    uint64_t mCUPSPatch = 0;
+
+    // Whether we have attempted to fetch mPrinterInfo with CUPS_HTTP_DEFAULT.
+    bool mTriedInitWithDefault = false;
+    // Whether we have attempted to fetch mPrinterInfo with a connection.
+    bool mTriedInitWithConnection = false;
+    CUPSPrinterInfo() = delete;
+    CUPSPrinterInfo(const CUPSPrinterInfo&) = delete;
+    CUPSPrinterInfo(CUPSPrinterInfo&& aOther)
+        : mPrinter(aOther.mPrinter),
+          mPrinterInfo(aOther.mPrinterInfo),
+          mCUPSMajor(aOther.mCUPSMajor),
+          mCUPSMinor(aOther.mCUPSMinor),
+          mCUPSPatch(aOther.mCUPSPatch) {
+      aOther.mPrinter = nullptr;
+      aOther.mPrinterInfo = nullptr;
+    }
+  };
+
+  using PrinterInfoMutex =
+      mozilla::DataMutexBase<CUPSPrinterInfo, mozilla::RecursiveMutex>;
+
+  using PrinterInfoLock = PrinterInfoMutex::AutoLock;
+
+  ~nsPrinterCUPS();
+
+  /**
+   * Retrieves the localized name for a given media (paper).
+   * Returns nullptr if the name cannot be localized.
+   */
+  const char* LocalizeMediaName(http_t& aConnection, cups_size_t& aMedia) const;
+
+  void GetPrinterName(nsAString& aName) const;
+
+  // Little util for getting support flags using the direct CUPS names.
+  bool Supports(const char* aOption, const char* aValue) const;
+
+  // Returns support value if CUPS meets the minimum version, otherwise returns
+  // |aDefault|
+  bool IsCUPSVersionAtLeast(uint64_t aCUPSMajor, uint64_t aCUPSMinor,
+                            uint64_t aCUPSPatch) const;
+
+  const char* FindCUPSOption(PrinterInfoLock& aLock, const char* name) const {
+    const cups_dest_t* const printer = aLock->mPrinter;
+    return mShim.cupsGetOption(name, printer->num_options, printer->options);
+  }
+
+  class Connection {
+   public:
+    http_t* GetConnection(cups_dest_t* aDest);
+
+    inline explicit Connection(const nsCUPSShim& aShim) : mShim(aShim) {}
+    Connection() = delete;
+    ~Connection();
+
+   protected:
+    const nsCUPSShim& mShim;
+    http_t* mConnection = CUPS_HTTP_DEFAULT;
+    bool mWasInited = false;
+  };
+
+  PrintSettingsInitializer DefaultSettings(Connection& aConnection) const;
+  nsTArray<mozilla::PaperInfo> PaperList(Connection& aConnection) const;
+  /**
+   * Attempts to populate the CUPSPrinterInfo object.
+   * This usually works with the CUPS default connection,
+   * but has been known to require an established connection
+   * on older versions of Ubuntu (18 and below).
+   */
+  PrinterInfoLock TryEnsurePrinterInfo(
+      http_t* const aConnection = CUPS_HTTP_DEFAULT) const {
+    PrinterInfoLock lock = mPrinterInfoMutex.Lock();
+    TryEnsurePrinterInfo(lock, aConnection);
+    return lock;
+  }
+
+  /**
+   * TryEnsurePrinterInfo that uses a caller-provided PrinterInfoLock.
+   *
+   * This can be used to avoid unnecessarily redundant locking of
+   * mPrinterInfoLock when getting a connection through
+   * Connection::GetConnection and then passing that into TryEnsurePrinterInfo.
+   */
+  void TryEnsurePrinterInfo(PrinterInfoLock& aLock,
+                            http_t* const aConnection) const;
+
+  const nsCUPSShim& mShim;
+  nsString mDisplayName;
+  mutable PrinterInfoMutex mPrinterInfoMutex;
+};
+
+// There's no standard setting in Core Printing for monochrome. Or rather,
+// there is (PMSetColorMode) but it does nothing. Similarly, the relevant gtk
+// setting only works on Windows, yay.
+//
+// So on CUPS the right setting to use depends on the print driver. So we set /
+// look for a variety of driver-specific keys that are known to work across
+// printers.
+//
+// We set all the known settings, because the alternative to that is parsing ppd
+// files from the printer and find the relevant known choices that can apply,
+// and that is a lot more complex, similarly sketchy (requires the same amount
+// of driver-specific knowledge), and requires using deprecated CUPS APIs.
+#define CUPS_EACH_MONOCHROME_PRINTER_SETTING(macro_)                           \
+  macro_("ColorModel", "Gray")                    /* Generic */                \
+      macro_("BRMonoColor", "Mono")               /* Brother */                \
+      macro_("BRPrintQuality", "Black")           /* Brother */                \
+      macro_("CNIJGrayScale", "1")                /* Canon */                  \
+      macro_("CNGrayscale", "True")               /* Canon */                  \
+      macro_("INK", "MONO")                       /* Epson */                  \
+      macro_("HPColorMode", "GrayscalePrint")     /* HP */                     \
+      macro_("ColorMode", "Mono")                 /* Samsung */                \
+      macro_("PrintoutMode", "Normal.Gray")       /* Foomatic */               \
+      macro_("ProcessColorModel", "Mono")         /* Samsung */                \
+      macro_("ARCMode", "CMBW")                   /* Sharp */                  \
+      macro_("XRXColor", "BW")                    /* Xerox */                  \
+      macro_("XROutputColor", "PrintAsGrayscale") /* Xerox, bug 1676191#c32 */ \
+      macro_("SelectColor", "Grayscale")          /* Konica Minolta */         \
+      macro_("OKControl", "Gray")                 /* Oki */                    \
+      macro_("BLW", "TrueM")                      /* Lexmark */                \
+      macro_("EPRendering", "None")               /* Epson */
+
+#endif /* nsPrinterCUPS_h___ */