Adds a bit of Greasemonkey support hidden behind the --enable-greasemonkey flag. Implementation follows the pattern of the visited links system.

Things still to be done:
- stop using a hardcoded script directory
- watch script directory and update shared memory when necessary
- move file io to background thread
- support for @include patterns -- now, all scripts are applied to all pages
Review URL: http://codereview.chromium.org/7254

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@3496 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 16 insertions, 0 deletions

diff --git a/chrome/common/chrome_paths.cc b/chrome/common/chrome_paths.cc
index 2e6d0bb..9d6da38 100644
--- a/chrome/common/chrome_paths.cc
+++ b/chrome/common/chrome_paths.cc
@@ -129,6 +129,11 @@ bool PathProvider(int key, std::wstring* result) {
         return false;
       file_util::AppendToPath(&cur, L"Dictionaries");
       break;
+    case chrome::DIR_USER_SCRIPTS:
+      // TODO(aa): Figure out where the script directory should live.
+      cur = L"C:\\SCRIPTS\\";
+      exists = true;  // don't trigger directory creation code
+      break;
     case chrome::FILE_LOCAL_STATE:
       if (!PathService::Get(chrome::DIR_USER_DATA, &cur))
         return false;
diff --git a/chrome/common/chrome_paths.h b/chrome/common/chrome_paths.h
index 02b14ae..8128122 100644
--- a/chrome/common/chrome_paths.h
+++ b/chrome/common/chrome_paths.h
@@ -24,6 +24,7 @@ enum {
   DIR_LOCALES,           // directory where locale resources are stored
   DIR_APP_DICTIONARIES,  // directory where the global dictionaries are
   DIR_USER_DOCUMENTS,    // directory for a user's "My Documents"
+  DIR_USER_SCRIPTS,      // directory where Greasemonkey user scripts are stored
   FILE_RESOURCE_MODULE,  // full path and filename of the module that contains
                          // embedded resources (version, strings, images, etc.)
   FILE_LOCAL_STATE,      // path and filename to the file in which machine/
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 1cfc40e7..3428318 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -330,6 +330,9 @@ const wchar_t kEnableP13n[] = L"enable-p13n";
 // SDCH is currently only supported server-side for searches on google.com.
 const wchar_t kSdchFilter[] = L"enable-sdch";
 
+// Enable Greasemonkey script support.
+const wchar_t kEnableGreasemonkey[] = L"enable-greasemonkey";
+
 // Causes the browser to launch directly in incognito mode.
 const wchar_t kIncognito[] = L"incognito";
 
diff --git a/chrome/common/chrome_switches.h b/chrome/common/chrome_switches.h
index 4c76cdc..19b3ae6 100644
--- a/chrome/common/chrome_switches.h
+++ b/chrome/common/chrome_switches.h
@@ -128,6 +128,8 @@ extern const wchar_t kEnableP13n[];
 
 extern const wchar_t kSdchFilter[];
 
+extern const wchar_t kEnableGreasemonkey[];
+
 extern const wchar_t kIncognito[];
 extern const wchar_t kUseNewSafeBrowsing[];
 
diff --git a/chrome/common/render_messages_internal.h b/chrome/common/render_messages_internal.h
index b7966ac..1b28898 100644
--- a/chrome/common/render_messages_internal.h
+++ b/chrome/common/render_messages_internal.h
@@ -155,6 +155,11 @@ IPC_BEGIN_MESSAGES(View, 1)
   // handle. This handle is valid in the context of the renderer
   IPC_MESSAGE_CONTROL1(ViewMsg_VisitedLink_NewTable, SharedMemoryHandle)
 
+  // Notification that the Greasemonkey scripts have been updated. It has one
+  // SharedMemoryHandle argument consisting of the pickled script data. This
+  // handle is valid in the context of the renderer.
+  IPC_MESSAGE_CONTROL1(ViewMsg_Greasemonkey_NewScripts, SharedMemoryHandle)
+
   // Sent when the user wants to search for a word on the page (find in page).
   // Request parameters are passed in as a FindInPageMsg_Request struct.
   IPC_MESSAGE_ROUTED1(ViewMsg_Find, FindInPageRequest)