From: Ubuntu

Subject: introduce a pref to prefer certain plugins for mime-types

diff --git a/modules/plugin/base/src/nsPluginHost.cpp b/modules/plugin/base/src/nsPluginHost.cpp

--- a/modules/plugin/base/src/nsPluginHost.cpp

+++ b/modules/plugin/base/src/nsPluginHost.cpp

@@ -1620,17 +1620,47 @@ nsPluginHost::FindPluginForType(const ch

   nsPluginTag *plugins = nsnull;

   PRInt32     variants, cnt;

   LoadPlugins();

   // if we have a mimetype passed in, search the mPlugins

   // linked list for a match

   if (aMimeType) {

+    nsresult res;

+    nsCOMPtr<nsIPrefBranch> prefB (do_QueryInterface(mPrefService));

+

+    char *preferredPluginPath = NULL;

+    nsCAutoString mimetypePrefString ("modules.plugins.mimetype.");

+    mimetypePrefString.Append(aMimeType);

+    const char *mimetypePrefChar = mimetypePrefString.get();

+    res = prefB->GetCharPref(mimetypePrefChar, &preferredPluginPath);

+

+    if(!NS_SUCCEEDED(res)) preferredPluginPath = NULL;

+

     plugins = mPlugins;

+    if(preferredPluginPath) {

+      while (nsnull != plugins) {

+        if (0 == PL_strcasecmp(plugins->mFileName.get(), preferredPluginPath) ||

+            0 == PL_strcasecmp(plugins->mFullPath.get(), preferredPluginPath)) {

+          return plugins;

+        }

+        plugins = plugins->mNext;

+      }

+

+      // now lets search for substrings

+      plugins=mPlugins;

+      while (nsnull != plugins) {

+        if (nsnull != PL_strstr(plugins->mFileName.get(), preferredPluginPath) ||

+            nsnull != PL_strstr(plugins->mFullPath.get(), preferredPluginPath)) {

+          return plugins;

+        }

+        plugins = plugins->mNext;

+      }

+    }

     while (plugins) {

       variants = plugins->mVariants;

       for (cnt = 0; cnt < variants; cnt++) {

         if ((!aCheckEnabled || plugins->IsEnabled()) &&

             plugins->mMimeTypeArray[cnt] &&

             (0 == PL_strcasecmp(plugins->mMimeTypeArray[cnt], aMimeType))) {

           return plugins;