summaryrefslogtreecommitdiffstats
path: root/browser/components/dirprovider/DirectoryProvider.cpp
blob: 7b4f81c7d2eeeaafbccb535c9401d1d156756d3c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
/* 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/. */

#include "nsIDirectoryService.h"
#include "DirectoryProvider.h"

#include "nsIFile.h"
#include "nsISimpleEnumerator.h"
#include "nsIPrefService.h"
#include "nsIPrefBranch.h"

#include "nsArrayEnumerator.h"
#include "nsEnumeratorUtils.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsDirectoryServiceDefs.h"
#include "nsCategoryManagerUtils.h"
#include "nsComponentManagerUtils.h"
#include "nsCOMArray.h"
#include "nsDirectoryServiceUtils.h"
#include "mozilla/ModuleUtils.h"
#include "nsServiceManagerUtils.h"
#include "nsString.h"
#include "nsXULAppAPI.h"
#include "nsIPrefLocalizedString.h"

namespace mozilla {
namespace browser {

NS_IMPL_ISUPPORTS(DirectoryProvider,
                  nsIDirectoryServiceProvider,
                  nsIDirectoryServiceProvider2)

NS_IMETHODIMP
DirectoryProvider::GetFile(const char *aKey, bool *aPersist, nsIFile* *aResult)
{
  return NS_ERROR_FAILURE;
}

static void
AppendFileKey(const char *key, nsIProperties* aDirSvc,
              nsCOMArray<nsIFile> &array)
{
  nsCOMPtr<nsIFile> file;
  nsresult rv = aDirSvc->Get(key, NS_GET_IID(nsIFile), getter_AddRefs(file));
  if (NS_FAILED(rv))
    return;

  bool exists;
  rv = file->Exists(&exists);
  if (NS_FAILED(rv) || !exists)
    return;

  array.AppendObject(file);
}

// Appends the distribution-specific search engine directories to the
// array.  The directory structure is as follows:

// appdir/
// \- distribution/
//    \- searchplugins/
//       |- common/
//       \- locale/
//          |- <locale 1>/
//          ...
//          \- <locale N>/

// common engines are loaded for all locales.  If there is no locale
// directory for the current locale, there is a pref:
// "distribution.searchplugins.defaultLocale"
// which specifies a default locale to use.

static void
AppendDistroSearchDirs(nsIProperties* aDirSvc, nsCOMArray<nsIFile> &array)
{
  nsCOMPtr<nsIFile> searchPlugins;
  nsresult rv = aDirSvc->Get(XRE_APP_DISTRIBUTION_DIR,
                             NS_GET_IID(nsIFile),
                             getter_AddRefs(searchPlugins));
  if (NS_FAILED(rv))
    return;
  searchPlugins->AppendNative(NS_LITERAL_CSTRING("searchplugins"));

  bool exists;
  rv = searchPlugins->Exists(&exists);
  if (NS_FAILED(rv) || !exists)
    return;

  nsCOMPtr<nsIFile> commonPlugins;
  rv = searchPlugins->Clone(getter_AddRefs(commonPlugins));
  if (NS_SUCCEEDED(rv)) {
    commonPlugins->AppendNative(NS_LITERAL_CSTRING("common"));
    rv = commonPlugins->Exists(&exists);
    if (NS_SUCCEEDED(rv) && exists)
        array.AppendObject(commonPlugins);
  }

  nsCOMPtr<nsIPrefBranch> prefs(do_GetService(NS_PREFSERVICE_CONTRACTID));
  if (prefs) {

    nsCOMPtr<nsIFile> localePlugins;
    rv = searchPlugins->Clone(getter_AddRefs(localePlugins));
    if (NS_FAILED(rv))
      return;

    localePlugins->AppendNative(NS_LITERAL_CSTRING("locale"));

    nsCString defLocale;
    rv = prefs->GetCharPref("distribution.searchplugins.defaultLocale",
                            getter_Copies(defLocale));
    if (NS_SUCCEEDED(rv)) {

      nsCOMPtr<nsIFile> defLocalePlugins;
      rv = localePlugins->Clone(getter_AddRefs(defLocalePlugins));
      if (NS_SUCCEEDED(rv)) {

        defLocalePlugins->AppendNative(defLocale);
        rv = defLocalePlugins->Exists(&exists);
        if (NS_SUCCEEDED(rv) && exists) {
          array.AppendObject(defLocalePlugins);
          return; // all done
        }
      }
    }

    // we didn't have a defaultLocale, use the user agent locale
    nsCString locale;
    nsCOMPtr<nsIPrefLocalizedString> prefString;
    rv = prefs->GetComplexValue("general.useragent.locale",
                                NS_GET_IID(nsIPrefLocalizedString),
                                getter_AddRefs(prefString));
    if (NS_SUCCEEDED(rv)) {
      nsAutoString wLocale;
      prefString->GetData(getter_Copies(wLocale));
      CopyUTF16toUTF8(wLocale, locale);
    } else {
      rv = prefs->GetCharPref("general.useragent.locale", getter_Copies(locale));
    }

    if (NS_SUCCEEDED(rv)) {

      nsCOMPtr<nsIFile> curLocalePlugins;
      rv = localePlugins->Clone(getter_AddRefs(curLocalePlugins));
      if (NS_SUCCEEDED(rv)) {

        curLocalePlugins->AppendNative(locale);
        rv = curLocalePlugins->Exists(&exists);
        if (NS_SUCCEEDED(rv) && exists) {
          array.AppendObject(curLocalePlugins);
          return; // all done
        }
      }
    }
  }
}

NS_IMETHODIMP
DirectoryProvider::GetFiles(const char *aKey, nsISimpleEnumerator* *aResult)
{
  /**
   * We want to preserve the following order, since the search service loads
   * engines in first-loaded-wins order.
   *   - distro search plugin locations (Loaded by the search service using
   *     NS_APP_DISTRIBUTION_SEARCH_DIR_LIST)
   *
   *   - engines shipped in chrome (Loaded from jar files by the search
   *     service)
   *
   *   Then other locations, from NS_APP_SEARCH_DIR_LIST:
   *   - extension search plugin locations (prepended below using
   *     NS_NewUnionEnumerator)
   *   - user search plugin locations (profile)
   */

  nsresult rv;

  if (!strcmp(aKey, NS_APP_DISTRIBUTION_SEARCH_DIR_LIST)) {
    nsCOMPtr<nsIProperties> dirSvc
      (do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID));
    if (!dirSvc)
      return NS_ERROR_FAILURE;

    nsCOMArray<nsIFile> distroFiles;
    AppendDistroSearchDirs(dirSvc, distroFiles);

    return NS_NewArrayEnumerator(aResult, distroFiles);
  }

  if (!strcmp(aKey, NS_APP_SEARCH_DIR_LIST)) {
    nsCOMPtr<nsIProperties> dirSvc
      (do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID));
    if (!dirSvc)
      return NS_ERROR_FAILURE;

    nsCOMArray<nsIFile> baseFiles;

    AppendFileKey(NS_APP_USER_SEARCH_DIR, dirSvc, baseFiles);

    nsCOMPtr<nsISimpleEnumerator> baseEnum;
    rv = NS_NewArrayEnumerator(getter_AddRefs(baseEnum), baseFiles);
    if (NS_FAILED(rv))
      return rv;

    nsCOMPtr<nsISimpleEnumerator> list;
    rv = dirSvc->Get(XRE_EXTENSIONS_DIR_LIST,
                     NS_GET_IID(nsISimpleEnumerator), getter_AddRefs(list));
    if (NS_FAILED(rv))
      return rv;

    static char const *const kAppendSPlugins[] = {"searchplugins", nullptr};

    nsCOMPtr<nsISimpleEnumerator> extEnum =
      new AppendingEnumerator(list, kAppendSPlugins);
    if (!extEnum)
      return NS_ERROR_OUT_OF_MEMORY;

    return NS_NewUnionEnumerator(aResult, extEnum, baseEnum);
  }

  return NS_ERROR_FAILURE;
}

NS_IMPL_ISUPPORTS(DirectoryProvider::AppendingEnumerator, nsISimpleEnumerator)

NS_IMETHODIMP
DirectoryProvider::AppendingEnumerator::HasMoreElements(bool *aResult)
{
  *aResult = mNext ? true : false;
  return NS_OK;
}

NS_IMETHODIMP
DirectoryProvider::AppendingEnumerator::GetNext(nsISupports* *aResult)
{
  if (aResult)
    NS_ADDREF(*aResult = mNext);

  mNext = nullptr;

  nsresult rv;

  // Ignore all errors

  bool more;
  while (NS_SUCCEEDED(mBase->HasMoreElements(&more)) && more) {
    nsCOMPtr<nsISupports> nextbasesupp;
    mBase->GetNext(getter_AddRefs(nextbasesupp));

    nsCOMPtr<nsIFile> nextbase(do_QueryInterface(nextbasesupp));
    if (!nextbase)
      continue;

    nextbase->Clone(getter_AddRefs(mNext));
    if (!mNext)
      continue;

    char const *const * i = mAppendList;
    while (*i) {
      mNext->AppendNative(nsDependentCString(*i));
      ++i;
    }

    bool exists;
    rv = mNext->Exists(&exists);
    if (NS_SUCCEEDED(rv) && exists)
      break;

    mNext = nullptr;
  }

  return NS_OK;
}

DirectoryProvider::AppendingEnumerator::AppendingEnumerator
    (nsISimpleEnumerator* aBase,
     char const *const *aAppendList) :
  mBase(aBase),
  mAppendList(aAppendList)
{
  // Initialize mNext to begin.
  GetNext(nullptr);
}

} // namespace browser
} // namespace mozilla