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dom/base/nsDOMClassInfoID.h@b8a032363ba2 (annotated)

dom/base/nsDOMClassInfoID.h

Thu, 22 Jan 2015 13:21:57 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Thu, 22 Jan 2015 13:21:57 +0100
branch
TOR_BUG_9701
changeset 15
b8a032363ba2
permissions
-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0 2 /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0 3 * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0 5
michael@0 6 /**
michael@0 7 * This file defines enum values for all of the DOM objects which have
michael@0 8 * an entry in nsDOMClassInfo.
michael@0 9 */
michael@0 10
michael@0 11 #ifndef nsDOMClassInfoID_h__
michael@0 12 #define nsDOMClassInfoID_h__
michael@0 13
michael@0 14 #include "nsIXPCScriptable.h"
michael@0 15
michael@0 16 #define DOMCI_CLASS(_dom_class) \
michael@0 17 eDOMClassInfo_##_dom_class##_id,
michael@0 18
michael@0 19 enum nsDOMClassInfoID {
michael@0 20
michael@0 21 #include "nsDOMClassInfoClasses.h"
michael@0 22
michael@0 23 // This one better be the last one in this list
michael@0 24 eDOMClassInfoIDCount
michael@0 25 };
michael@0 26
michael@0 27 #undef DOMCI_CLASS
michael@0 28
michael@0 29 /**
michael@0 30 * nsIClassInfo helper macros
michael@0 31 */
michael@0 32
michael@0 33 /**
michael@0 34 * !! THIS MECHANISM IS DEPRECATED, DO NOT ADD MORE INTERFACE TO THESE LISTS !!
michael@0 35 *
michael@0 36 * DOMCI_CASTABLE_INTERFACES contains the list of interfaces that we have a bit
michael@0 37 * for in nsDOMClassInfo's mInterfacesBitmap. To use it you need to define
michael@0 38 * DOMCI_CASTABLE_INTERFACE(interface, bit, extra) and then call
michael@0 39 * DOMCI_CASTABLE_INTERFACES(extra). For every interface there will be one
michael@0 40 * call to DOMCI_CASTABLE_INTERFACE with the bit that it corresponds to and
michael@0 41 * the extra argument that was passed in to DOMCI_CASTABLE_INTERFACES.
michael@0 42 *
michael@0 43 * WARNING: Be very careful when adding interfaces to this list. Every object
michael@0 44 * that implements one of these interfaces must be directly castable
michael@0 45 * to that interface from the *canonical* nsISupports! Also, none of
michael@0 46 * the objects that implement these interfaces may use the new DOM
michael@0 47 * bindings.
michael@0 48 */
michael@0 49 #undef DOMCI_CASTABLE_INTERFACE
michael@0 50 #define DOMCI_CASTABLE_INTERFACES(_extra) \
michael@0 51 DOMCI_CASTABLE_INTERFACE(nsINode, nsINode, 0, _extra) \
michael@0 52 DOMCI_CASTABLE_NODECL_INTERFACE(mozilla::dom::Element, mozilla::dom::Element,\
michael@0 53 1, _extra) \
michael@0 54 /* If this is ever removed, the IID for EventTarget can go away */ \
michael@0 55 DOMCI_CASTABLE_NODECL_INTERFACE(mozilla::dom::EventTarget, \
michael@0 56 mozilla::dom::EventTarget, 2, _extra) \
michael@0 57 DOMCI_CASTABLE_NODECL_INTERFACE(mozilla::dom::Event, nsIDOMEvent, 3, _extra) \
michael@0 58 DOMCI_CASTABLE_INTERFACE(nsIDocument, nsIDocument, 4, _extra) \
michael@0 59 DOMCI_CASTABLE_INTERFACE(nsDocument, nsIDocument, 5, _extra) \
michael@0 60 DOMCI_CASTABLE_INTERFACE(nsGenericHTMLElement, nsIContent, 6, _extra) \
michael@0 61 DOMCI_CASTABLE_INTERFACE(nsHTMLDocument, nsIDocument, 7, _extra) \
michael@0 62 DOMCI_CASTABLE_INTERFACE(nsStyledElement, nsStyledElement, 8, _extra) \
michael@0 63 DOMCI_CASTABLE_INTERFACE(nsSVGElement, nsIContent, 9, _extra) \
michael@0 64 /* NOTE: When removing the casts below, remove the dom::EventBase class */ \
michael@0 65 DOMCI_CASTABLE_NODECL_INTERFACE(mozilla::dom::MouseEvent, \
michael@0 66 mozilla::dom::EventBase, 10, _extra) \
michael@0 67 DOMCI_CASTABLE_NODECL_INTERFACE(mozilla::dom::UIEvent, \
michael@0 68 mozilla::dom::EventBase, 11, _extra) \
michael@0 69 DOMCI_CASTABLE_INTERFACE(nsGlobalWindow, nsIDOMEventTarget, 12, _extra)
michael@0 70
michael@0 71 // Make sure all classes mentioned in DOMCI_CASTABLE_INTERFACES
michael@0 72 // have been declared.
michael@0 73 #define DOMCI_CASTABLE_NODECL_INTERFACE(_interface, _u1, _u2, _u3) /* Nothing */
michael@0 74 #define DOMCI_CASTABLE_INTERFACE(_interface, _u1, _u2, _u3) class _interface;
michael@0 75 DOMCI_CASTABLE_INTERFACES(unused)
michael@0 76 #undef DOMCI_CASTABLE_INTERFACE
michael@0 77 #undef DOMCI_CASTABLE_NODECL_INTERFACE
michael@0 78 namespace mozilla {
michael@0 79 namespace dom {
michael@0 80 class Element;
michael@0 81 class Event;
michael@0 82 class EventTarget;
michael@0 83 class MouseEvent;
michael@0 84 class UIEvent;
michael@0 85 } // namespace dom
michael@0 86 } // namespace mozilla
michael@0 87
michael@0 88 #define DOMCI_CASTABLE_NODECL_INTERFACE DOMCI_CASTABLE_INTERFACE
michael@0 89
michael@0 90 #ifdef MOZILLA_INTERNAL_API
michael@0 91
michael@0 92 #define DOMCI_CLASS(_dom_class) \
michael@0 93 extern const uint32_t kDOMClassInfo_##_dom_class##_interfaces;
michael@0 94
michael@0 95 #include "nsDOMClassInfoClasses.h"
michael@0 96
michael@0 97 #undef DOMCI_CLASS
michael@0 98
michael@0 99 /**
michael@0 100 * Provide a general "does class C implement interface I" predicate.
michael@0 101 * This is not as sophisticated as e.g. boost's is_base_of template,
michael@0 102 * but it does the job adequately for our purposes.
michael@0 103 */
michael@0 104
michael@0 105 #if defined(__GNUC__) || _MSC_FULL_VER >= 140050215
michael@0 106
michael@0 107 /* Use a compiler intrinsic if one is available. */
michael@0 108
michael@0 109 #define DOMCI_CASTABLE_TO(_interface, _class) __is_base_of(_interface, _class)
michael@0 110
michael@0 111 #else
michael@0 112
michael@0 113 /* The generic version of this predicate relies on the overload resolution
michael@0 114 * rules. If |_class| inherits from |_interface|, the |_interface*|
michael@0 115 * overload of DOMCI_CastableTo<_interface>::p() will be chosen, otherwise
michael@0 116 * the |void*| overload will be chosen. There is no definition of these
michael@0 117 * functions; we determine which overload was selected by inspecting the
michael@0 118 * size of the return type.
michael@0 119 */
michael@0 120
michael@0 121 template <typename Interface> struct DOMCI_CastableTo {
michael@0 122 struct false_type { int x[1]; };
michael@0 123 struct true_type { int x[2]; };
michael@0 124 static false_type p(void*);
michael@0 125 static true_type p(Interface*);
michael@0 126 };
michael@0 127
michael@0 128 #define DOMCI_CASTABLE_TO(_interface, _class) \
michael@0 129 (sizeof(DOMCI_CastableTo<_interface>::p(static_cast<_class*>(0))) == \
michael@0 130 sizeof(DOMCI_CastableTo<_interface>::true_type))
michael@0 131
michael@0 132 #endif
michael@0 133
michael@0 134 /**
michael@0 135 * Here we calculate the bitmap for a given class.
michael@0 136 */
michael@0 137 #define DOMCI_CASTABLE_INTERFACE(_interface, _base, _bit, _class) \
michael@0 138 (DOMCI_CASTABLE_TO(_interface, _class) ? 1 << _bit : 0) +
michael@0 139
michael@0 140 #define DOMCI_DATA(_dom_class, _class) \
michael@0 141 const uint32_t kDOMClassInfo_##_dom_class##_interfaces = \
michael@0 142 DOMCI_CASTABLE_INTERFACES(_class) \
michael@0 143 0;
michael@0 144
michael@0 145 class nsIClassInfo;
michael@0 146 class nsXPCClassInfo;
michael@0 147
michael@0 148 extern nsIClassInfo*
michael@0 149 NS_GetDOMClassInfoInstance(nsDOMClassInfoID aID);
michael@0 150
michael@0 151 #define NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(_class) \
michael@0 152 if (aIID.Equals(NS_GET_IID(nsIClassInfo)) || \
michael@0 153 aIID.Equals(NS_GET_IID(nsXPCClassInfo))) { \
michael@0 154 foundInterface = NS_GetDOMClassInfoInstance(eDOMClassInfo_##_class##_id); \
michael@0 155 if (!foundInterface) { \
michael@0 156 *aInstancePtr = nullptr; \
michael@0 157 return NS_ERROR_OUT_OF_MEMORY; \
michael@0 158 } \
michael@0 159 } else
michael@0 160
michael@0 161 #define NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO_CONDITIONAL(_class, condition) \
michael@0 162 if ((condition) && \
michael@0 163 (aIID.Equals(NS_GET_IID(nsIClassInfo)) || \
michael@0 164 aIID.Equals(NS_GET_IID(nsXPCClassInfo)))) { \
michael@0 165 foundInterface = NS_GetDOMClassInfoInstance(eDOMClassInfo_##_class##_id); \
michael@0 166 if (!foundInterface) { \
michael@0 167 *aInstancePtr = nullptr; \
michael@0 168 return NS_ERROR_OUT_OF_MEMORY; \
michael@0 169 } \
michael@0 170 } else
michael@0 171
michael@0 172 #else
michael@0 173
michael@0 174 // See nsIDOMClassInfo.h
michael@0 175
michael@0 176 #endif // MOZILLA_INTERNAL_API
michael@0 177
michael@0 178 #endif // nsDOMClassInfoID_h__

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