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, 710 insertions, 0 deletions

diff --git a/xpcom/idl-parser/xpidl/header.py b/xpcom/idl-parser/xpidl/header.py
new file mode 100644
index 0000000000..0066491712
--- /dev/null
+++ b/xpcom/idl-parser/xpidl/header.py
@@ -0,0 +1,710 @@
+#!/usr/bin/env python
+# header.py - Generate C++ header files from IDL.
+#
+# 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/.
+
+"""Print a C++ header file for the IDL files specified on the command line"""
+
+import itertools
+import os.path
+import re
+
+from xpidl import xpidl
+
+printdoccomments = False
+
+if printdoccomments:
+
+    def printComments(fd, clist, indent):
+        for c in clist:
+            fd.write("%s%s\n" % (indent, c))
+
+
+else:
+
+    def printComments(fd, clist, indent):
+        pass
+
+
+def firstCap(str):
+    return str[0].upper() + str[1:]
+
+
+def attributeParamName(a):
+    return "a" + firstCap(a.name)
+
+
+def attributeParamNames(a, getter, return_param=True):
+    if getter and (a.notxpcom or not return_param):
+        l = []
+    else:
+        l = [attributeParamName(a)]
+    if a.implicit_jscontext:
+        l.insert(0, "cx")
+    return ", ".join(l)
+
+
+def attributeNativeName(a, getter):
+    binaryname = a.binaryname is not None and a.binaryname or firstCap(a.name)
+    return "%s%s" % (getter and "Get" or "Set", binaryname)
+
+
+def attributeAttributes(a, getter):
+    ret = ""
+
+    if a.must_use:
+        ret = "[[nodiscard]] " + ret
+
+    # Ideally, we'd set MOZ_CAN_RUN_SCRIPT in the "scriptable and not
+    # builtinclass" case too, so we'd just have memberCanRunScript() check
+    # explicit_setter_can_run_script/explicit_setter_can_run_script and call it
+    # here.  But that would likely require a fair amount of Gecko-side
+    # annotation work.  See bug 1534292.
+    if (a.explicit_getter_can_run_script and getter) or (
+        a.explicit_setter_can_run_script and not getter
+    ):
+        ret = "MOZ_CAN_RUN_SCRIPT " + ret
+
+    return ret
+
+
+def attributeReturnType(a, getter, macro):
+    """macro should be NS_IMETHOD or NS_IMETHODIMP"""
+    # Pick the type to be returned from the getter/setter.
+    if a.notxpcom:
+        ret = a.realtype.nativeType("in").strip() if getter else "void"
+    else:
+        ret = "nsresult"
+
+    # Set calling convention and virtual-ness
+    if a.nostdcall:
+        if macro == "NS_IMETHOD":
+            # This is the declaration.
+            ret = "virtual %s" % ret
+    else:
+        if ret == "nsresult":
+            ret = macro
+        else:
+            ret = "%s_(%s)" % (macro, ret)
+
+    return attributeAttributes(a, getter) + ret
+
+
+def attributeParamlist(a, getter, return_param=True):
+    if getter and (a.notxpcom or not return_param):
+        l = []
+    else:
+        l = [
+            "%s%s"
+            % (a.realtype.nativeType(getter and "out" or "in"), attributeParamName(a))
+        ]
+    if a.implicit_jscontext:
+        l.insert(0, "JSContext* cx")
+
+    return ", ".join(l)
+
+
+def attributeAsNative(a, getter, declType="NS_IMETHOD"):
+    params = {
+        "returntype": attributeReturnType(a, getter, declType),
+        "binaryname": attributeNativeName(a, getter),
+        "paramlist": attributeParamlist(a, getter),
+    }
+    return "%(returntype)s %(binaryname)s(%(paramlist)s)" % params
+
+
+def methodNativeName(m):
+    return m.binaryname is not None and m.binaryname or firstCap(m.name)
+
+
+def methodAttributes(m):
+    ret = ""
+
+    if m.must_use:
+        ret = "[[nodiscard]] " + ret
+
+    # Ideally, we'd set MOZ_CAN_RUN_SCRIPT in the "scriptable and not
+    # builtinclass" case too, so we'd just have memberCanRunScript() check
+    # explicit_can_run_script and call it here.  But that would likely require
+    # a fair amount of Gecko-side annotation work.  See bug 1534292.
+    if m.explicit_can_run_script:
+        ret = "MOZ_CAN_RUN_SCRIPT " + ret
+
+    return ret
+
+
+def methodReturnType(m, macro):
+    """macro should be NS_IMETHOD or NS_IMETHODIMP"""
+    if m.notxpcom:
+        ret = m.realtype.nativeType("in").strip()
+    else:
+        ret = "nsresult"
+
+    # Set calling convention and virtual-ness
+    if m.nostdcall:
+        if macro == "NS_IMETHOD":
+            # This is the declaration
+            ret = "virtual %s" % ret
+    else:
+        if ret == "nsresult":
+            ret = macro
+        else:
+            ret = "%s_(%s)" % (macro, ret)
+
+    return methodAttributes(m) + ret
+
+
+def methodAsNative(m, declType="NS_IMETHOD"):
+    return "%s %s(%s)" % (
+        methodReturnType(m, declType),
+        methodNativeName(m),
+        paramlistAsNative(m),
+    )
+
+
+def paramlistAsNative(m, empty="void", return_param=True):
+    l = [paramAsNative(p) for p in m.params]
+
+    if m.implicit_jscontext:
+        l.append("JSContext* cx")
+
+    if m.optional_argc:
+        l.append("uint8_t _argc")
+
+    if not m.notxpcom and m.realtype.name != "void" and return_param:
+        l.append(
+            paramAsNative(
+                xpidl.Param(
+                    paramtype="out",
+                    type=None,
+                    name="_retval",
+                    attlist=[],
+                    location=None,
+                    realtype=m.realtype,
+                )
+            )
+        )
+
+    # Set any optional out params to default to nullptr. Skip if we just added
+    # extra non-optional args to l.
+    if len(l) == len(m.params):
+        paramIter = len(m.params) - 1
+        while (
+            paramIter >= 0
+            and m.params[paramIter].optional
+            and "out" in m.params[paramIter].paramtype
+        ):
+            t = m.params[paramIter].type
+            # Strings can't be optional, so this shouldn't happen, but let's make sure:
+            if t == "AString" or t == "ACString" or t == "AUTF8String":
+                break
+            l[paramIter] += " = nullptr"
+            paramIter -= 1
+
+    if len(l) == 0:
+        return empty
+
+    return ", ".join(l)
+
+
+def memberCanRunScript(member):
+    # This can only happen if the member is scriptable and its interface is not builtinclass.
+    return member.isScriptable() and not member.iface.attributes.builtinclass
+
+
+def runScriptAnnotation(member):
+    return "JS_HAZ_CAN_RUN_SCRIPT " if memberCanRunScript(member) else ""
+
+
+def paramAsNative(p):
+    default_spec = ""
+    if p.default_value:
+        default_spec = " = " + p.default_value
+    return "%s%s%s" % (p.nativeType(), p.name, default_spec)
+
+
+def paramlistNames(m, return_param=True):
+    names = [p.name for p in m.params]
+
+    if m.implicit_jscontext:
+        names.append("cx")
+
+    if m.optional_argc:
+        names.append("_argc")
+
+    if not m.notxpcom and m.realtype.name != "void" and return_param:
+        names.append("_retval")
+
+    if len(names) == 0:
+        return ""
+    return ", ".join(names)
+
+
+header = """/*
+ * DO NOT EDIT.  THIS FILE IS GENERATED FROM $SRCDIR/%(relpath)s
+ */
+
+#ifndef __gen_%(basename)s_h__
+#define __gen_%(basename)s_h__
+"""
+
+include = """
+#include "%(basename)s.h"
+"""
+
+jsvalue_include = """
+#include "js/Value.h"
+"""
+
+infallible_includes = """
+#include "mozilla/AlreadyAddRefed.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/DebugOnly.h"
+"""
+
+can_run_script_includes = """
+#include "js/GCAnnotations.h"
+"""
+
+header_end = """/* For IDL files that don't want to include root IDL files. */
+#ifndef NS_NO_VTABLE
+#define NS_NO_VTABLE
+#endif
+"""
+
+footer = """
+#endif /* __gen_%(basename)s_h__ */
+"""
+
+forward_decl = """class %(name)s; /* forward declaration */
+
+"""
+
+
+def idl_basename(f):
+    """returns the base name of a file with the last extension stripped"""
+    return os.path.basename(f).rpartition(".")[0]
+
+
+def print_header(idl, fd, filename, relpath):
+    fd.write(header % {"relpath": relpath, "basename": idl_basename(filename)})
+
+    foundinc = False
+    for inc in idl.includes():
+        if not foundinc:
+            foundinc = True
+            fd.write("\n")
+        fd.write(include % {"basename": idl_basename(inc.filename)})
+
+    if idl.needsJSTypes():
+        fd.write(jsvalue_include)
+
+    # Include some extra files if any attributes are infallible.
+    interfaces = [p for p in idl.productions if p.kind == "interface"]
+    wroteRunScriptIncludes = False
+    wroteInfallibleIncludes = False
+    for iface in interfaces:
+        for member in iface.members:
+            if not isinstance(member, xpidl.Attribute) and not isinstance(
+                member, xpidl.Method
+            ):
+                continue
+            if not wroteInfallibleIncludes and member.infallible:
+                fd.write(infallible_includes)
+                wroteInfallibleIncludes = True
+            if not wroteRunScriptIncludes and memberCanRunScript(member):
+                fd.write(can_run_script_includes)
+                wroteRunScriptIncludes = True
+        if wroteRunScriptIncludes and wroteInfallibleIncludes:
+            break
+
+    fd.write("\n")
+    fd.write(header_end)
+
+    for p in idl.productions:
+        if p.kind == "include":
+            continue
+        if p.kind == "cdata":
+            fd.write(p.data)
+            continue
+
+        if p.kind == "webidl":
+            write_webidl(p, fd)
+            continue
+        if p.kind == "forward":
+            fd.write(forward_decl % {"name": p.name})
+            continue
+        if p.kind == "interface":
+            write_interface(p, fd)
+            continue
+        if p.kind == "typedef":
+            printComments(fd, p.doccomments, "")
+            fd.write("typedef %s %s;\n\n" % (p.realtype.nativeType("in"), p.name))
+
+    fd.write(footer % {"basename": idl_basename(filename)})
+
+
+def write_webidl(p, fd):
+    path = p.native.split("::")
+    for seg in path[:-1]:
+        fd.write("namespace %s {\n" % seg)
+    fd.write("class %s; /* webidl %s */\n" % (path[-1], p.name))
+    for seg in reversed(path[:-1]):
+        fd.write("} // namespace %s\n" % seg)
+    fd.write("\n")
+
+
+iface_header = r"""
+/* starting interface:    %(name)s */
+#define %(defname)s_IID_STR "%(iid)s"
+
+#define %(defname)s_IID \
+  {0x%(m0)s, 0x%(m1)s, 0x%(m2)s, \
+    { %(m3joined)s }}
+
+"""
+
+uuid_decoder = re.compile(
+    r"""(?P<m0>[a-f0-9]{8})-
+                              (?P<m1>[a-f0-9]{4})-
+                              (?P<m2>[a-f0-9]{4})-
+                              (?P<m3>[a-f0-9]{4})-
+                              (?P<m4>[a-f0-9]{12})$""",
+    re.X,
+)
+
+iface_prolog = """ {
+ public:
+
+  NS_DECLARE_STATIC_IID_ACCESSOR(%(defname)s_IID)
+
+"""
+
+iface_scriptable = """\
+  /* Used by ToJSValue to check which scriptable interface is implemented. */
+  using ScriptableInterfaceType = %(name)s;
+
+"""
+
+iface_epilog = """};
+
+  NS_DEFINE_STATIC_IID_ACCESSOR(%(name)s, %(defname)s_IID)
+
+/* Use this macro when declaring classes that implement this interface. */
+#define NS_DECL_%(macroname)s """
+
+iface_nonvirtual = """
+
+/* Use this macro when declaring the members of this interface when the
+   class doesn't implement the interface. This is useful for forwarding. */
+#define NS_DECL_NON_VIRTUAL_%(macroname)s """
+
+iface_forward = """
+
+/* Use this macro to declare functions that forward the behavior of this interface to another object. */
+#define NS_FORWARD_%(macroname)s(_to) """  # NOQA: E501
+
+iface_forward_safe = """
+
+/* Use this macro to declare functions that forward the behavior of this interface to another object in a safe way. */
+#define NS_FORWARD_SAFE_%(macroname)s(_to) """  # NOQA: E501
+
+builtin_infallible_tmpl = """\
+  %(attributes)sinline %(realtype)s %(nativename)s(%(args)s)
+  {
+    %(realtype)sresult;
+    mozilla::DebugOnly<nsresult> rv = %(nativename)s(%(argnames)s&result);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+    return result;
+  }
+"""
+
+# NOTE: We don't use RefPtr::forget here because we don't want to need the
+# definition of %(realtype)s in scope, which we would need for the
+# AddRef/Release calls.
+refcnt_infallible_tmpl = """\
+  %(attributes)s inline already_AddRefed<%(realtype)s> %(nativename)s(%(args)s)
+  {
+    %(realtype)s* result = nullptr;
+    mozilla::DebugOnly<nsresult> rv = %(nativename)s(%(argnames)s&result);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+    return already_AddRefed<%(realtype)s>(result);
+  }
+"""
+
+
+def infallibleDecl(member):
+    isattr = isinstance(member, xpidl.Attribute)
+    ismethod = isinstance(member, xpidl.Method)
+    assert isattr or ismethod
+
+    realtype = member.realtype.nativeType("in")
+    tmpl = builtin_infallible_tmpl
+
+    if member.realtype.kind != "builtin" and member.realtype.kind != "cenum":
+        assert realtype.endswith(" *"), "bad infallible type"
+        tmpl = refcnt_infallible_tmpl
+        realtype = realtype[:-2]  # strip trailing pointer
+
+    if isattr:
+        nativename = attributeNativeName(member, getter=True)
+        args = attributeParamlist(member, getter=True, return_param=False)
+        argnames = attributeParamNames(member, getter=True, return_param=False)
+        attributes = attributeAttributes(member, getter=True)
+    else:
+        nativename = methodNativeName(member)
+        args = paramlistAsNative(member, return_param=False)
+        argnames = paramlistNames(member, return_param=False)
+        attributes = methodAttributes(member)
+
+    return tmpl % {
+        "attributes": attributes,
+        "realtype": realtype,
+        "nativename": nativename,
+        "args": args,
+        "argnames": argnames + ", " if argnames else "",
+    }
+
+
+def write_interface(iface, fd):
+    if iface.namemap is None:
+        raise Exception("Interface was not resolved.")
+
+    # Confirm that no names of methods will overload in this interface
+    names = set()
+
+    def record_name(name):
+        if name in names:
+            raise Exception(
+                "Unexpected overloaded virtual method %s in interface %s"
+                % (name, iface.name)
+            )
+        names.add(name)
+
+    for m in iface.members:
+        if type(m) == xpidl.Attribute:
+            record_name(attributeNativeName(m, getter=True))
+            if not m.readonly:
+                record_name(attributeNativeName(m, getter=False))
+        elif type(m) == xpidl.Method:
+            record_name(methodNativeName(m))
+
+    def write_const_decls(g):
+        fd.write("  enum {\n")
+        enums = []
+        for c in g:
+            printComments(fd, c.doccomments, "  ")
+            basetype = c.basetype
+            value = c.getValue()
+            enums.append(
+                "    %(name)s = %(value)s%(signed)s"
+                % {
+                    "name": c.name,
+                    "value": value,
+                    "signed": (not basetype.signed) and "U" or "",
+                }
+            )
+        fd.write(",\n".join(enums))
+        fd.write("\n  };\n\n")
+
+    def write_cenum_decl(b):
+        fd.write("  enum %s : uint%d_t {\n" % (b.basename, b.width))
+        for var in b.variants:
+            fd.write("    %s = %s,\n" % (var.name, var.value))
+        fd.write("  };\n\n")
+
+    def write_method_decl(m):
+        printComments(fd, m.doccomments, "  ")
+
+        fd.write("  /* %s */\n" % m.toIDL())
+        fd.write("  %s%s = 0;\n\n" % (runScriptAnnotation(m), methodAsNative(m)))
+
+        if m.infallible:
+            fd.write(infallibleDecl(m))
+
+    def write_attr_decl(a):
+        printComments(fd, a.doccomments, "  ")
+
+        fd.write("  /* %s */\n" % a.toIDL())
+
+        fd.write("  %s%s = 0;\n" % (runScriptAnnotation(a), attributeAsNative(a, True)))
+        if a.infallible:
+            fd.write(infallibleDecl(a))
+
+        if not a.readonly:
+            fd.write(
+                "  %s%s = 0;\n" % (runScriptAnnotation(a), attributeAsNative(a, False))
+            )
+        fd.write("\n")
+
+    defname = iface.name.upper()
+    if iface.name[0:2] == "ns":
+        defname = "NS_" + defname[2:]
+
+    names = uuid_decoder.match(iface.attributes.uuid).groupdict()
+    m3str = names["m3"] + names["m4"]
+    names["m3joined"] = ", ".join(["0x%s" % m3str[i : i + 2] for i in range(0, 16, 2)])
+
+    if iface.name[2] == "I":
+        implclass = iface.name[:2] + iface.name[3:]
+    else:
+        implclass = "_MYCLASS_"
+
+    names.update(
+        {
+            "defname": defname,
+            "macroname": iface.name.upper(),
+            "name": iface.name,
+            "iid": iface.attributes.uuid,
+            "implclass": implclass,
+        }
+    )
+
+    fd.write(iface_header % names)
+
+    printComments(fd, iface.doccomments, "")
+
+    fd.write("class ")
+    foundcdata = False
+    for m in iface.members:
+        if isinstance(m, xpidl.CDATA):
+            foundcdata = True
+
+    if not foundcdata:
+        fd.write("NS_NO_VTABLE ")
+
+    fd.write(iface.name)
+    if iface.base:
+        fd.write(" : public %s" % iface.base)
+    fd.write(iface_prolog % names)
+
+    if iface.attributes.scriptable:
+        fd.write(iface_scriptable % names)
+
+    for key, group in itertools.groupby(iface.members, key=type):
+        if key == xpidl.ConstMember:
+            write_const_decls(group)  # iterator of all the consts
+        else:
+            for member in group:
+                if key == xpidl.Attribute:
+                    write_attr_decl(member)
+                elif key == xpidl.Method:
+                    write_method_decl(member)
+                elif key == xpidl.CDATA:
+                    fd.write(" %s" % member.data)
+                elif key == xpidl.CEnum:
+                    write_cenum_decl(member)
+                else:
+                    raise Exception("Unexpected interface member: %s" % member)
+
+    fd.write(iface_epilog % names)
+
+    def writeDeclaration(fd, iface, virtual):
+        declType = "NS_IMETHOD" if virtual else "nsresult"
+        suffix = " override" if virtual else ""
+        for member in iface.members:
+            if isinstance(member, xpidl.Attribute):
+                if member.infallible:
+                    fd.write(
+                        "\\\n  using %s::%s; "
+                        % (iface.name, attributeNativeName(member, True))
+                    )
+                fd.write(
+                    "\\\n  %s%s; " % (attributeAsNative(member, True, declType), suffix)
+                )
+                if not member.readonly:
+                    fd.write(
+                        "\\\n  %s%s; "
+                        % (attributeAsNative(member, False, declType), suffix)
+                    )
+            elif isinstance(member, xpidl.Method):
+                fd.write("\\\n  %s%s; " % (methodAsNative(member, declType), suffix))
+        if len(iface.members) == 0:
+            fd.write("\\\n  /* no methods! */")
+        elif member.kind not in ("attribute", "method"):
+            fd.write("\\")
+
+    writeDeclaration(fd, iface, True)
+    fd.write(iface_nonvirtual % names)
+    writeDeclaration(fd, iface, False)
+    fd.write(iface_forward % names)
+
+    def emitTemplate(forward_infallible, tmpl, tmpl_notxpcom=None):
+        if tmpl_notxpcom is None:
+            tmpl_notxpcom = tmpl
+        for member in iface.members:
+            if isinstance(member, xpidl.Attribute):
+                if forward_infallible and member.infallible:
+                    fd.write(
+                        "\\\n  using %s::%s; "
+                        % (iface.name, attributeNativeName(member, True))
+                    )
+                attr_tmpl = tmpl_notxpcom if member.notxpcom else tmpl
+                fd.write(
+                    attr_tmpl
+                    % {
+                        "asNative": attributeAsNative(member, True),
+                        "nativeName": attributeNativeName(member, True),
+                        "paramList": attributeParamNames(member, True),
+                    }
+                )
+                if not member.readonly:
+                    fd.write(
+                        attr_tmpl
+                        % {
+                            "asNative": attributeAsNative(member, False),
+                            "nativeName": attributeNativeName(member, False),
+                            "paramList": attributeParamNames(member, False),
+                        }
+                    )
+            elif isinstance(member, xpidl.Method):
+                if member.notxpcom:
+                    fd.write(
+                        tmpl_notxpcom
+                        % {
+                            "asNative": methodAsNative(member),
+                            "nativeName": methodNativeName(member),
+                            "paramList": paramlistNames(member),
+                        }
+                    )
+                else:
+                    fd.write(
+                        tmpl
+                        % {
+                            "asNative": methodAsNative(member),
+                            "nativeName": methodNativeName(member),
+                            "paramList": paramlistNames(member),
+                        }
+                    )
+        if len(iface.members) == 0:
+            fd.write("\\\n  /* no methods! */")
+        elif member.kind not in ("attribute", "method"):
+            fd.write("\\")
+
+    emitTemplate(
+        True,
+        "\\\n  %(asNative)s override { return _to %(nativeName)s(%(paramList)s); } ",
+    )
+
+    fd.write(iface_forward_safe % names)
+
+    # Don't try to safely forward notxpcom functions, because we have no
+    # sensible default error return.  Instead, the caller will have to
+    # implement them.
+    emitTemplate(
+        False,
+        "\\\n  %(asNative)s override { return !_to ? NS_ERROR_NULL_POINTER : _to->%(nativeName)s(%(paramList)s); } ",  # NOQA: E501
+        "\\\n  %(asNative)s override; ",
+    )
+
+    fd.write("\n\n")
+
+
+def main(outputfile):
+    xpidl.IDLParser()
+
+
+if __name__ == "__main__":
+    main(None)