1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* vim: set ts=2 sw=2 et tw=78: */
3 : /* ***** BEGIN LICENSE BLOCK *****
4 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 : *
6 : * The contents of this file are subject to the Mozilla Public License Version
7 : * 1.1 (the "License"); you may not use this file except in compliance with
8 : * the License. You may obtain a copy of the License at
9 : * http://www.mozilla.org/MPL/
10 : *
11 : * Software distributed under the License is distributed on an "AS IS" basis,
12 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 : * for the specific language governing rights and limitations under the
14 : * License.
15 : *
16 : * The Original Code is mozilla.org code.
17 : *
18 : * The Initial Developer of the Original Code is
19 : * Netscape Communications Corporation.
20 : * Portions created by the Initial Developer are Copyright (C) 1998
21 : * the Initial Developer. All Rights Reserved.
22 : *
23 : * Contributor(s):
24 : * Vidur Apparao <vidur@netscape.com>
25 : * L. David Baron <dbaron@mozillafoundation.org>
26 : *
27 : * Alternatively, the contents of this file may be used under the terms of
28 : * either of the GNU General Public License Version 2 or later (the "GPL"),
29 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
30 : * in which case the provisions of the GPL or the LGPL are applicable instead
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32 : * under the terms of either the GPL or the LGPL, and not to allow others to
33 : * use your version of this file under the terms of the MPL, indicate your
34 : * decision by deleting the provisions above and replace them with the notice
35 : * and other provisions required by the GPL or the LGPL. If you do not delete
36 : * the provisions above, a recipient may use your version of this file under
37 : * the terms of any one of the MPL, the GPL or the LGPL.
38 : *
39 : * ***** END LICENSE BLOCK ***** */
40 :
41 : /**
42 : * This is not a generated file. It contains common utility functions
43 : * invoked from the JavaScript code generated from IDL interfaces.
44 : * The goal of the utility functions is to cut down on the size of
45 : * the generated code itself.
46 : */
47 :
48 : #include "nsJSUtils.h"
49 : #include "jsapi.h"
50 : #include "jsdbgapi.h"
51 : #include "prprf.h"
52 : #include "nsIScriptContext.h"
53 : #include "nsIScriptObjectOwner.h"
54 : #include "nsIScriptGlobalObject.h"
55 : #include "nsIServiceManager.h"
56 : #include "nsIXPConnect.h"
57 : #include "nsCOMPtr.h"
58 : #include "nsContentUtils.h"
59 : #include "nsIScriptSecurityManager.h"
60 : #include "nsPIDOMWindow.h"
61 :
62 : #include "nsDOMJSUtils.h" // for GetScriptContextFromJSContext
63 :
64 : JSBool
65 0 : nsJSUtils::GetCallingLocation(JSContext* aContext, const char* *aFilename,
66 : PRUint32* aLineno)
67 : {
68 : // Get the current filename and line number
69 0 : JSStackFrame* frame = nsnull;
70 0 : JSScript* script = nsnull;
71 0 : do {
72 0 : frame = ::JS_FrameIterator(aContext, &frame);
73 :
74 0 : if (frame) {
75 0 : script = ::JS_GetFrameScript(aContext, frame);
76 : }
77 : } while (frame && !script);
78 :
79 0 : if (script) {
80 0 : const char* filename = ::JS_GetScriptFilename(aContext, script);
81 :
82 0 : if (filename) {
83 0 : PRUint32 lineno = 0;
84 0 : jsbytecode* bytecode = ::JS_GetFramePC(aContext, frame);
85 :
86 0 : if (bytecode) {
87 0 : lineno = ::JS_PCToLineNumber(aContext, script, bytecode);
88 : }
89 :
90 0 : *aFilename = filename;
91 0 : *aLineno = lineno;
92 0 : return JS_TRUE;
93 : }
94 : }
95 :
96 0 : return JS_FALSE;
97 : }
98 :
99 : nsIScriptGlobalObject *
100 389 : nsJSUtils::GetStaticScriptGlobal(JSContext* aContext, JSObject* aObj)
101 : {
102 : nsISupports* supports;
103 : JSClass* clazz;
104 389 : JSObject* glob = aObj; // starting point for search
105 :
106 389 : if (!glob)
107 0 : return nsnull;
108 :
109 389 : glob = JS_GetGlobalForObject(aContext, glob);
110 389 : NS_ABORT_IF_FALSE(glob, "Infallible returns null");
111 :
112 389 : clazz = JS_GetClass(glob);
113 :
114 1556 : if (!clazz ||
115 389 : !(clazz->flags & JSCLASS_HAS_PRIVATE) ||
116 389 : !(clazz->flags & JSCLASS_PRIVATE_IS_NSISUPPORTS) ||
117 389 : !(supports = (nsISupports*)::JS_GetPrivate(glob))) {
118 0 : return nsnull;
119 : }
120 :
121 : // We might either have a window directly (e.g. if the global is a
122 : // sandbox whose script object principal pointer is a window), or an
123 : // XPCWrappedNative for a window. We could also have other
124 : // sandbox-related script object principals, but we can't do much
125 : // about those short of trying to walk the proto chain of |glob|
126 : // looking for a window or something.
127 778 : nsCOMPtr<nsIScriptGlobalObject> sgo(do_QueryInterface(supports));
128 389 : if (!sgo) {
129 778 : nsCOMPtr<nsIXPConnectWrappedNative> wrapper(do_QueryInterface(supports));
130 389 : NS_ENSURE_TRUE(wrapper, nsnull);
131 778 : sgo = do_QueryWrappedNative(wrapper);
132 : }
133 :
134 : // We're returning a pointer to something that's about to be
135 : // released, but that's ok here.
136 389 : return sgo;
137 : }
138 :
139 : nsIScriptContext *
140 0 : nsJSUtils::GetStaticScriptContext(JSContext* aContext, JSObject* aObj)
141 : {
142 0 : nsIScriptGlobalObject *nativeGlobal = GetStaticScriptGlobal(aContext, aObj);
143 0 : if (!nativeGlobal)
144 0 : return nsnull;
145 :
146 0 : return nativeGlobal->GetScriptContext(nsIProgrammingLanguage::JAVASCRIPT);
147 : }
148 :
149 : nsIScriptGlobalObject *
150 0 : nsJSUtils::GetDynamicScriptGlobal(JSContext* aContext)
151 : {
152 0 : nsIScriptContext *scriptCX = GetDynamicScriptContext(aContext);
153 0 : if (!scriptCX)
154 0 : return nsnull;
155 0 : return scriptCX->GetGlobalObject();
156 : }
157 :
158 : nsIScriptContext *
159 0 : nsJSUtils::GetDynamicScriptContext(JSContext *aContext)
160 : {
161 0 : return GetScriptContextFromJSContext(aContext);
162 : }
163 :
164 : PRUint64
165 389 : nsJSUtils::GetCurrentlyRunningCodeInnerWindowID(JSContext *aContext)
166 : {
167 389 : if (!aContext)
168 0 : return 0;
169 :
170 389 : PRUint64 innerWindowID = 0;
171 :
172 389 : JSObject *jsGlobal = JS_GetGlobalForScopeChain(aContext);
173 389 : if (jsGlobal) {
174 : nsIScriptGlobalObject *scriptGlobal = GetStaticScriptGlobal(aContext,
175 389 : jsGlobal);
176 389 : if (scriptGlobal) {
177 0 : nsCOMPtr<nsPIDOMWindow> win = do_QueryInterface(scriptGlobal);
178 0 : if (win)
179 0 : innerWindowID = win->WindowID();
180 : }
181 : }
182 :
183 389 : return innerWindowID;
184 : }
185 :
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