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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/renderer/user_script_slave.h" | 5 #include "chrome/renderer/user_script_slave.h" |
6 | 6 |
7 #include "app/resource_bundle.h" | 7 #include "app/resource_bundle.h" |
8 #include "base/histogram.h" | 8 #include "base/histogram.h" |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "base/perftimer.h" | 10 #include "base/perftimer.h" |
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25 static const char kUserScriptHead[] = "(function (unsafeWindow) {\n"; | 25 static const char kUserScriptHead[] = "(function (unsafeWindow) {\n"; |
26 static const char kUserScriptTail[] = "\n})(window);"; | 26 static const char kUserScriptTail[] = "\n})(window);"; |
27 | 27 |
28 // Creates a convenient reference to a content script's parent extension. | 28 // Creates a convenient reference to a content script's parent extension. |
29 // TODO(mpcomplete): self.onConnect is deprecated. Remove it at 1.0. | 29 // TODO(mpcomplete): self.onConnect is deprecated. Remove it at 1.0. |
30 // http://code.google.com/p/chromium/issues/detail?id=16356 | 30 // http://code.google.com/p/chromium/issues/detail?id=16356 |
31 static const char kInitExtension[] = | 31 static const char kInitExtension[] = |
32 "chrome.extension = new chrome.Extension('%s');" | 32 "chrome.extension = new chrome.Extension('%s');" |
33 "chrome.self.onConnect = chrome.extension.onConnect;"; | 33 "chrome.self.onConnect = chrome.extension.onConnect;"; |
34 | 34 |
| 35 int UserScriptSlave::GetIsolatedWorldId(const std::string& extension_id) { |
| 36 typedef std::map<std::string, int> IsolatedWorldMap; |
| 37 |
| 38 static IsolatedWorldMap g_isolated_world_ids; |
| 39 static int g_next_isolated_world_id = 1; |
| 40 |
| 41 IsolatedWorldMap::iterator iter = g_isolated_world_ids.find(extension_id); |
| 42 if (iter != g_isolated_world_ids.end()) |
| 43 return iter->second; |
| 44 |
| 45 int new_id = g_next_isolated_world_id; |
| 46 ++g_next_isolated_world_id; |
| 47 |
| 48 // This map will tend to pile up over time, but realistically, you're never |
| 49 // going to have enough extensions for it to matter. |
| 50 g_isolated_world_ids[extension_id] = new_id; |
| 51 return new_id; |
| 52 } |
| 53 |
35 UserScriptSlave::UserScriptSlave() | 54 UserScriptSlave::UserScriptSlave() |
36 : shared_memory_(NULL), | 55 : shared_memory_(NULL), |
37 script_deleter_(&scripts_), | 56 script_deleter_(&scripts_), |
38 user_script_start_line_(0) { | 57 user_script_start_line_(0) { |
39 api_js_ = ResourceBundle::GetSharedInstance().GetRawDataResource( | 58 api_js_ = ResourceBundle::GetSharedInstance().GetRawDataResource( |
40 IDR_GREASEMONKEY_API_JS); | 59 IDR_GREASEMONKEY_API_JS); |
41 | 60 |
42 // Count the number of lines that will be injected before the user script. | 61 // Count the number of lines that will be injected before the user script. |
43 base::StringPiece::size_type pos = 0; | 62 base::StringPiece::size_type pos = 0; |
44 while ((pos = api_js_.find('\n', pos)) != base::StringPiece::npos) { | 63 while ((pos = api_js_.find('\n', pos)) != base::StringPiece::npos) { |
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152 if (script->is_standalone()) { | 171 if (script->is_standalone()) { |
153 content.insert(0, kUserScriptHead); | 172 content.insert(0, kUserScriptHead); |
154 content += kUserScriptTail; | 173 content += kUserScriptTail; |
155 } | 174 } |
156 sources.push_back( | 175 sources.push_back( |
157 WebScriptSource(WebString::fromUTF8(content), file.url())); | 176 WebScriptSource(WebString::fromUTF8(content), file.url())); |
158 } | 177 } |
159 } | 178 } |
160 | 179 |
161 if (!sources.empty()) { | 180 if (!sources.empty()) { |
| 181 int isolated_world_id = 0; |
| 182 |
162 if (script->is_standalone()) { | 183 if (script->is_standalone()) { |
163 // For standalone scripts, we try to emulate the Greasemonkey API. | 184 // For standalone scripts, we try to emulate the Greasemonkey API. |
164 sources.insert(sources.begin(), | 185 sources.insert(sources.begin(), |
165 WebScriptSource(WebString::fromUTF8(api_js_.as_string()))); | 186 WebScriptSource(WebString::fromUTF8(api_js_.as_string()))); |
166 } else { | 187 } else { |
167 // Setup chrome.self to contain an Extension object with the correct | 188 // Setup chrome.self to contain an Extension object with the correct |
168 // ID. | 189 // ID. |
169 InsertInitExtensionCode(&sources, script->extension_id()); | 190 InsertInitExtensionCode(&sources, script->extension_id()); |
| 191 isolated_world_id = GetIsolatedWorldId(script->extension_id()); |
170 } | 192 } |
171 | 193 |
172 frame->executeScriptInNewWorld(&sources.front(), sources.size(), | 194 frame->executeScriptInIsolatedWorld( |
173 EXTENSION_GROUP_CONTENT_SCRIPTS); | 195 isolated_world_id, &sources.front(), sources.size(), |
| 196 EXTENSION_GROUP_CONTENT_SCRIPTS); |
174 } | 197 } |
175 } | 198 } |
176 | 199 |
177 // Log debug info. | 200 // Log debug info. |
178 if (location == UserScript::DOCUMENT_START) { | 201 if (location == UserScript::DOCUMENT_START) { |
179 UMA_HISTOGRAM_COUNTS_100("Extensions.InjectStart_CssCount", num_css); | 202 UMA_HISTOGRAM_COUNTS_100("Extensions.InjectStart_CssCount", num_css); |
180 UMA_HISTOGRAM_COUNTS_100("Extensions.InjectStart_ScriptCount", num_scripts); | 203 UMA_HISTOGRAM_COUNTS_100("Extensions.InjectStart_ScriptCount", num_scripts); |
181 UMA_HISTOGRAM_TIMES("Extensions.InjectStart_Time", timer.Elapsed()); | 204 UMA_HISTOGRAM_TIMES("Extensions.InjectStart_Time", timer.Elapsed()); |
182 } else { | 205 } else { |
183 UMA_HISTOGRAM_COUNTS_100("Extensions.InjectEnd_ScriptCount", num_scripts); | 206 UMA_HISTOGRAM_COUNTS_100("Extensions.InjectEnd_ScriptCount", num_scripts); |
184 UMA_HISTOGRAM_TIMES("Extensions.InjectEnd_Time", timer.Elapsed()); | 207 UMA_HISTOGRAM_TIMES("Extensions.InjectEnd_Time", timer.Elapsed()); |
185 } | 208 } |
186 | 209 |
187 LOG(INFO) << "Injected " << num_scripts << " scripts and " << num_css << | 210 LOG(INFO) << "Injected " << num_scripts << " scripts and " << num_css << |
188 "css files into " << frame->url().spec().data(); | 211 "css files into " << frame->url().spec().data(); |
189 return true; | 212 return true; |
190 } | 213 } |
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