modules/plugin/base/src/nsPluginsDirUtils.h

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  37
  38 #ifndef nsPluginsDirUtils_h___
  39 #define nsPluginsDirUtils_h___
  40
  41 #include "nsPluginsDir.h"
  42 #include "nsVoidArray.h"
  43 #include "prmem.h"
  44
  45 ///////////////////////////////////////////////////////////////////////////////
  46 // Ouput format from NPP_GetMIMEDescription: "...mime type[;version]:[extension]:[desecription];..."
  47 // The ambiguity of mime description could cause the browser fail to parse the MIME types
  48 // correctly.
  49 // E.g. "mime type::desecription;" // correct w/o ext
  50 //      "mime type:desecription;"  // wrong w/o ext
  51 //
  52 static nsresult
  53 ParsePluginMimeDescription(const char *mdesc, nsPluginInfo &info)
  54 {
  55     nsresult rv = NS_ERROR_FAILURE;
  56     if (!mdesc || !*mdesc)
  57        return rv;
  58
  59     char *mdescDup = PL_strdup(mdesc); // make a dup of intput string we'll change it content
  60     char anEmptyString[] = "";
  61     nsAutoVoidArray tmpMimeTypeArr;
  62     char delimiters[] = {':',':',';'};
  63     int mimeTypeVariantCount = 0;
  64     char *p = mdescDup; // make a dup of intput string we'll change it content
  65     while(p) {
  66         char *ptrMimeArray[] = {anEmptyString, anEmptyString, anEmptyString};
  67
  68         // It's easy to point out ptrMimeArray[0] to the string sounds like
  69         // "Mime type is not specified, plugin will not function properly."
  70         // and show this on "about:plugins" page, but we have to mark this particular
  71         // mime type of given plugin as disable on "about:plugins" page,
  72         // which feature is not implemented yet.
  73         // So we'll ignore, without any warnings, an empty description strings,
  74         // in other words, if after parsing ptrMimeArray[0] == anEmptyString is true.
  75         // It is possible do not to registry a plugin at all if it returns
  76         // an empty string on GetMIMEDescription() call,
  77         // e.g. plugger returns "" if pluggerrc file is not found.
  78
  79         char *s = p;
  80         int i;
  81         for (i = 0; i < (int) sizeof(delimiters) && (p = PL_strchr(s, delimiters[i])); i++) {
  82             ptrMimeArray[i] = s; // save start ptr
  83             *p++ = 0; // overwrite delimiter
  84             s = p; // move forward
  85         }
  86         if (i == 2)
  87            ptrMimeArray[i] = s;
  88         // fill out the temp array
  89         // the order is important, it should be the same in for loop below
  90         if (ptrMimeArray[0] != anEmptyString) {
  91             tmpMimeTypeArr.AppendElement((void*) ptrMimeArray[0]);
  92             tmpMimeTypeArr.AppendElement((void*) ptrMimeArray[1]);
  93             tmpMimeTypeArr.AppendElement((void*) ptrMimeArray[2]);
  94             mimeTypeVariantCount++;
  95         }
  96     }
  97
  98     // fill out info structure
  99     if (mimeTypeVariantCount) {
 100         info.fVariantCount         = mimeTypeVariantCount;
 101         // we can do these 3 mallocs at once, later on code cleanup
 102         info.fMimeTypeArray        = (char **)PR_Malloc(mimeTypeVariantCount * sizeof(char *));
 103         info.fMimeDescriptionArray = (char **)PR_Malloc(mimeTypeVariantCount * sizeof(char *));
 104         info.fExtensionArray       = (char **)PR_Malloc(mimeTypeVariantCount * sizeof(char *));
 105
 106         int j,i;
 107         for (j = i = 0; i < mimeTypeVariantCount; i++) {
 108             // the order is important, do not change it
 109            // we can get rid of PL_strdup here, later on code cleanup
 110             info.fMimeTypeArray[i]        =  PL_strdup((char*) tmpMimeTypeArr.ElementAt(j++));
 111             info.fExtensionArray[i]       =  PL_strdup((char*) tmpMimeTypeArr.ElementAt(j++));
 112             info.fMimeDescriptionArray[i] =  PL_strdup((char*) tmpMimeTypeArr.ElementAt(j++));
 113         }
 114         rv = NS_OK;
 115     }
 116     if (mdescDup)
 117         PR_Free(mdescDup);
 118     return rv;
 119 }
 120
 121 #endif /* nsPluginsDirUtils_h___ */