layout/style/test/ParseCSS.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 // vim:cindent:ts=8:et:sw=4:
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 /*
   8  * This file is meant to be used with |#define CSS_REPORT_PARSE_ERRORS|
   9  * in mozilla/dom/html/style/src/nsCSSScanner.h uncommented, and the
  10  * |#ifdef DEBUG| block in nsCSSScanner::OutputError (in
  11  * nsCSSScanner.cpp in the same directory) used (even if not a debug
  12  * build).
  13  */
  14
  15 #include "nsXPCOM.h"
  16 #include "nsCOMPtr.h"
  17
  18 #include "nsIFile.h"
  19 #include "nsNetUtil.h"
  20
  21 #include "nsContentCID.h"
  22 #include "mozilla/StyleSheetInlines.h"
  23 #include "mozilla/css/Loader.h"
  24
  25 using namespace mozilla;
  26
  27 static already_AddRefed<nsIURI> FileToURI(const char* aFilename,
  28                                           nsresult* aRv = 0) {
  29   nsCOMPtr<nsIFile> lf(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, aRv));
  30   NS_ENSURE_TRUE(lf, nullptr);
  31   // XXX Handle relative paths somehow.
  32   lf->InitWithNativePath(nsDependentCString(aFilename));
  33
  34   nsIURI* uri = nullptr;
  35   nsresult rv = NS_NewFileURI(&uri, lf);
  36   if (aRv) *aRv = rv;
  37   return uri;
  38 }
  39
  40 static int ParseCSSFile(nsIURI* aSheetURI) {
  41   RefPtr<mozilla::css::Loader> = new mozilla::css::Loader();
  42   RefPtr<CSSStyleSheet> sheet;
  43   loader->LoadSheetSync(aSheetURI, getter_AddRefs(sheet));
  44   NS_ASSERTION(sheet, "sheet load failed");
  45   /* This can happen if the file can't be found (e.g. you
  46    * ask for a relative path and xpcom/io rejects it)
  47    */
  48   if (!sheet) return -1;
  49   bool complete;
  50   sheet->GetComplete(complete);
  51   NS_ASSERTION(complete, "synchronous load did not complete");
  52   if (!complete) return -2;
  53   return 0;
  54 }
  55
  56 int main(int argc, char** argv) {
  57   if (argc < 2) {
  58     fprintf(stderr, "%s [FILE]...\n", argv[0]);
  59   }
  60   nsresult rv = NS_InitXPCOM(nullptr, nullptr, nullptr);
  61   if (NS_FAILED(rv)) return (int)rv;
  62
  63   int res = 0;
  64   for (int i = 1; i < argc; ++i) {
  65     const char* filename = argv[i];
  66
  67     printf("\nParsing %s.\n", filename);
  68
  69     nsCOMPtr<nsIURI> uri = FileToURI(filename, &rv);
  70     if (rv == NS_ERROR_OUT_OF_MEMORY) {
  71       fprintf(stderr, "Out of memory.\n");
  72       return 1;
  73     }
  74     if (uri) res = ParseCSSFile(uri);
  75   }
  76
  77   NS_ShutdownXPCOM(nullptr);
  78
  79   return res;
  80 }