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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:ts=8:et:sw=4:
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
* This file is meant to be used with |#define CSS_REPORT_PARSE_ERRORS|
* in mozilla/dom/html/style/src/nsCSSScanner.h uncommented, and the
* |#ifdef DEBUG| block in nsCSSScanner::OutputError (in
* nsCSSScanner.cpp in the same directory) used (even if not a debug
* build).
#include "nsXPCOM.h"
#include "nsCOMPtr.h"
#include "nsIFile.h"
#include "nsNetUtil.h"
#include "nsContentCID.h"
#include "mozilla/StyleSheetInlines.h"
#include "mozilla/css/Loader.h"
using namespace mozilla;
static already_AddRefed<nsIURI> FileToURI(const char* aFilename,
nsresult* aRv = 0) {
nsCOMPtr<nsIFile> lf(do_CreateInstance(NS_LOCAL_FILE_CONTRACTID, aRv));
NS_ENSURE_TRUE(lf, nullptr);
// XXX Handle relative paths somehow.
nsIURI* uri = nullptr;
nsresult rv = NS_NewFileURI(&uri, lf);
if (aRv) *aRv = rv;
return uri;
static int ParseCSSFile(nsIURI* aSheetURI) {
RefPtr<mozilla::css::Loader> = new mozilla::css::Loader();
RefPtr<CSSStyleSheet> sheet;
loader->LoadSheetSync(aSheetURI, getter_AddRefs(sheet));
NS_ASSERTION(sheet, "sheet load failed");
/* This can happen if the file can't be found (e.g. you
* ask for a relative path and xpcom/io rejects it)
if (!sheet) return -1;
bool complete;
NS_ASSERTION(complete, "synchronous load did not complete");
if (!complete) return -2;
return 0;
int main(int argc, char** argv) {
if (argc < 2) {
fprintf(stderr, "%s [FILE]...\n", argv[0]);
nsresult rv = NS_InitXPCOM(nullptr, nullptr, nullptr);
if (NS_FAILED(rv)) return (int)rv;
int res = 0;
for (int i = 1; i < argc; ++i) {
const char* filename = argv[i];
printf("\nParsing %s.\n", filename);
nsCOMPtr<nsIURI> uri = FileToURI(filename, &rv);
fprintf(stderr, "Out of memory.\n");
return 1;
if (uri) res = ParseCSSFile(uri);
return res;