1 files changed, 86 insertions, 0 deletions
diff --git a/widget/gtk/nsCUPSShim.h b/widget/gtk/nsCUPSShim.h
new file mode 100644
index 000000000..3e7d96f3a
--- /dev/null
+++ b/widget/gtk/nsCUPSShim.h
@@ -0,0 +1,86 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ex: set tabstop=8 softtabstop=4 shiftwidth=4 expandtab: */
+/* 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 nsCUPSShim_h___
+#define nsCUPSShim_h___
+
+
+/* Various CUPS data types. We don't #include cups headers to avoid
+ * requiring CUPS to be installed on the build host (and to avoid having
+ * to test for CUPS in configure).
+ */
+typedef struct                          /**** Printer Options ****/
+{
+    char          *name;                  /* Name of option */
+    char          *value;                 /* Value of option */
+} cups_option_t;
+
+typedef struct               /**** Destination ****/
+{
+    char          *name,       /* Printer or class name */
+                  *instance;   /* Local instance name or nullptr */
+    int           is_default;  /* Is this printer the default? */
+    int           num_options; /* Number of options */
+    cups_option_t *options;    /* Options */
+} cups_dest_t;
+
+typedef cups_dest_t* (*CupsGetDestType)(const char *printer,
+                                        const char *instance,
+                                        int num_dests,
+                                        cups_dest_t *dests);
+typedef int (*CupsGetDestsType)(cups_dest_t **dests);
+typedef int (*CupsFreeDestsType)(int         num_dests,
+                                 cups_dest_t *dests);
+typedef int (*CupsPrintFileType)(const char    *printer,
+                                 const char    *filename,
+                                 const char    *title,
+                                 int           num_options,
+                                 cups_option_t *options);
+typedef int (*CupsTempFdType)(char *filename,
+                              int   length);
+typedef int (*CupsAddOptionType)(const char    *name,
+                                 const char    *value,
+                                 int           num_options,
+                                 cups_option_t **options);
+
+struct PRLibrary;
+
+/* Note: this class relies on static initialization. */
+class nsCUPSShim {
+    public:
+        /**
+         * Initialize this object. Attempt to load the CUPS shared
+         * library and find function pointers for the supported
+         * functions (see below).
+         * @return false if the shared library could not be loaded, or if
+         *                  any of the functions could not be found.
+         *         true  for successful initialization.
+         */
+        bool Init();
+
+        /**
+         * @return true  if the object was initialized successfully.
+         *         false otherwise.
+         */
+        bool IsInitialized() { return nullptr != mCupsLib; }
+
+        /* Function pointers for supported functions. These are only
+         * valid after successful initialization.
+         */
+        CupsAddOptionType   mCupsAddOption;
+        CupsFreeDestsType   mCupsFreeDests;
+        CupsGetDestType     mCupsGetDest;
+        CupsGetDestsType    mCupsGetDests;
+        CupsPrintFileType   mCupsPrintFile;
+        CupsTempFdType      mCupsTempFd;
+
+    private:
+        PRLibrary *mCupsLib;
+};
+
+
+
+#endif /* nsCUPSShim_h___ */