1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 : *
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 the Mozilla browser.
17 : *
18 : * The Initial Developer of the Original Code is
19 : * Netscape Communications, Inc.
20 : * Portions created by the Initial Developer are Copyright (C) 1999
21 : * the Initial Developer. All Rights Reserved.
22 : *
23 : * Contributor(s):
24 : * Adam Lock <adamlock@netscape.com>
25 : *
26 : * Alternatively, the contents of this file may be used under the terms of
27 : * either the GNU General Public License Version 2 or later (the "GPL"), or
28 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 : * in which case the provisions of the GPL or the LGPL are applicable instead
30 : * of those above. If you wish to allow use of your version of this file only
31 : * under the terms of either the GPL or the LGPL, and not to allow others to
32 : * use your version of this file under the terms of the MPL, indicate your
33 : * decision by deleting the provisions above and replace them with the notice
34 : * and other provisions required by the GPL or the LGPL. If you do not delete
35 : * the provisions above, a recipient may use your version of this file under
36 : * the terms of any one of the MPL, the GPL or the LGPL.
37 : *
38 : * ***** END LICENSE BLOCK ***** */
39 :
40 : #include "nsCommandHandler.h"
41 : #include "nsWebBrowser.h"
42 : #include "nsDocShellTreeOwner.h"
43 :
44 : #include "nsIAllocator.h"
45 : #include "nsPIDOMWindow.h"
46 :
47 0 : nsCommandHandler::nsCommandHandler() :
48 0 : mWindow(nsnull)
49 : {
50 0 : }
51 :
52 0 : nsCommandHandler::~nsCommandHandler()
53 : {
54 0 : }
55 :
56 0 : nsresult nsCommandHandler::GetCommandHandler(nsICommandHandler **aCommandHandler)
57 : {
58 0 : NS_ENSURE_ARG_POINTER(aCommandHandler);
59 :
60 0 : *aCommandHandler = nsnull;
61 0 : if (mWindow == nsnull)
62 : {
63 0 : return NS_ERROR_FAILURE;
64 : }
65 :
66 0 : nsCOMPtr<nsPIDOMWindow> window(do_QueryInterface(mWindow));
67 0 : if (!window)
68 : {
69 0 : return NS_ERROR_FAILURE;
70 : }
71 :
72 : // Get the document tree owner
73 :
74 : nsCOMPtr<nsIDocShellTreeItem> docShellAsTreeItem =
75 0 : do_QueryInterface(window->GetDocShell());
76 0 : nsIDocShellTreeOwner *treeOwner = nsnull;
77 0 : docShellAsTreeItem->GetTreeOwner(&treeOwner);
78 :
79 : // Make sure the tree owner is an an nsDocShellTreeOwner object
80 : // by QI'ing for a hidden interface. If it doesn't have the interface
81 : // then it's not safe to do the casting.
82 :
83 0 : nsCOMPtr<nsICDocShellTreeOwner> realTreeOwner(do_QueryInterface(treeOwner));
84 0 : if (realTreeOwner)
85 : {
86 0 : nsDocShellTreeOwner *tree = static_cast<nsDocShellTreeOwner *>(treeOwner);
87 0 : if (tree->mTreeOwner)
88 : {
89 : nsresult rv;
90 0 : rv = tree->mTreeOwner->QueryInterface(NS_GET_IID(nsICommandHandler), (void **)aCommandHandler);
91 0 : NS_RELEASE(treeOwner);
92 0 : return rv;
93 : }
94 :
95 0 : NS_RELEASE(treeOwner);
96 : }
97 :
98 0 : *aCommandHandler = nsnull;
99 :
100 0 : return NS_OK;
101 : }
102 :
103 :
104 0 : NS_IMPL_ADDREF(nsCommandHandler)
105 0 : NS_IMPL_RELEASE(nsCommandHandler)
106 :
107 0 : NS_INTERFACE_MAP_BEGIN(nsCommandHandler)
108 0 : NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsICommandHandler)
109 0 : NS_INTERFACE_MAP_ENTRY(nsICommandHandlerInit)
110 0 : NS_INTERFACE_MAP_ENTRY(nsICommandHandler)
111 0 : NS_INTERFACE_MAP_END
112 :
113 : ///////////////////////////////////////////////////////////////////////////////
114 : // nsICommandHandlerInit implementation
115 :
116 : /* attribute nsIDocShell docShell; */
117 0 : NS_IMETHODIMP nsCommandHandler::GetWindow(nsIDOMWindow * *aWindow)
118 : {
119 0 : *aWindow = nsnull;
120 0 : return NS_OK;
121 : }
122 :
123 0 : NS_IMETHODIMP nsCommandHandler::SetWindow(nsIDOMWindow * aWindow)
124 : {
125 0 : if (aWindow == nsnull)
126 : {
127 0 : return NS_ERROR_FAILURE;
128 : }
129 0 : mWindow = aWindow;
130 0 : return NS_OK;
131 : }
132 :
133 : ///////////////////////////////////////////////////////////////////////////////
134 : // nsICommandHandler implementation
135 :
136 : /* string exec (in string aCommand, in string aStatus); */
137 0 : NS_IMETHODIMP nsCommandHandler::Exec(const char *aCommand, const char *aStatus, char **aResult)
138 : {
139 0 : NS_ENSURE_ARG_POINTER(aCommand);
140 0 : NS_ENSURE_ARG_POINTER(aResult);
141 :
142 0 : nsCOMPtr<nsICommandHandler> commandHandler;
143 0 : GetCommandHandler(getter_AddRefs(commandHandler));
144 :
145 : // Call the client's command handler to deal with this command
146 0 : if (commandHandler)
147 : {
148 0 : *aResult = nsnull;
149 0 : return commandHandler->Exec(aCommand, aStatus, aResult);
150 : }
151 :
152 : // Return an empty string
153 0 : const char szEmpty[] = "";
154 0 : *aResult = (char *) nsAllocator::Clone(szEmpty, sizeof(szEmpty));
155 :
156 0 : return NS_OK;
157 : }
158 :
159 : /* string query (in string aCommand, in string aStatus); */
160 0 : NS_IMETHODIMP nsCommandHandler::Query(const char *aCommand, const char *aStatus, char **aResult)
161 : {
162 0 : NS_ENSURE_ARG_POINTER(aCommand);
163 0 : NS_ENSURE_ARG_POINTER(aResult);
164 :
165 0 : nsCOMPtr<nsICommandHandler> commandHandler;
166 0 : GetCommandHandler(getter_AddRefs(commandHandler));
167 :
168 : // Call the client's command handler to deal with this command
169 0 : if (commandHandler)
170 : {
171 0 : *aResult = nsnull;
172 0 : return commandHandler->Query(aCommand, aStatus, aResult);
173 : }
174 :
175 : // Return an empty string
176 0 : const char szEmpty[] = "";
177 0 : *aResult = (char *) nsAllocator::Clone(szEmpty, sizeof(szEmpty));
178 :
179 0 : return NS_OK;
180 : }
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