layout/style/nsCSSKeywords.cpp
author Nika Layzell <nika@thelayzells.com>
Tue, 25 Sep 2018 17:34:53 +0200
changeset 507828 5e6dae0c1e5a4939ccd406f14607f7fafffd45a7
parent 442038 905239391e05483e8fb221378dd2092c5a0df8b7
child 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1448426 - Wrap windows.h to avoid problematic define statements, r=froydnj,glandium By default, windows.h exposes a large number of problematic define statements which are UpperCamelCase, such as a define from `CreateWindow` to `CreateWindow{A,W}`. As many of these names are generic (e.g. CreateFile, CreateWindow), they can mess up Gecko code that may legitimately have its own methods with the same names. The header also defines some traditional SCREAMING_SNAKE_CASE defines which can mess up our code by conflicting with local values. This patch adds a simple code generator which generates wrappers for these defines, and uses them to wrap the windows.h wrapper using the `stl_wrappers` mechanism, allowing us to use windows.h in more places. Differential Revision: https://phabricator.services.mozilla.com/D10932

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 http://mozilla.org/MPL/2.0/. */

/* keywords used within CSS property values */

#include "nsCSSKeywords.h"
#include "nsString.h"
#include "nsStaticNameTable.h"

// required to make the symbol external, so that TestCSSPropertyLookup.cpp can link with it
extern const char* const kCSSRawKeywords[];

// define an array of all CSS keywords
#define CSS_KEY(_name,_id) #_name,
const char* const kCSSRawKeywords[] = {
#include "nsCSSKeywordList.h"
};
#undef CSS_KEY

static int32_t gKeywordTableRefCount;
static nsStaticCaseInsensitiveNameTable* gKeywordTable;

void
nsCSSKeywords::AddRefTable(void)
{
  if (0 == gKeywordTableRefCount++) {
    NS_ASSERTION(!gKeywordTable, "pre existing array!");
    gKeywordTable =
      new nsStaticCaseInsensitiveNameTable(kCSSRawKeywords, eCSSKeyword_COUNT);
#ifdef DEBUG
    // Partially verify the entries.
    int32_t index = 0;
    for (; index < eCSSKeyword_COUNT && kCSSRawKeywords[index]; ++index) {
      nsAutoCString temp(kCSSRawKeywords[index]);
      NS_ASSERTION(-1 == temp.FindChar('_'), "underscore char in table");
    }
    NS_ASSERTION(index == eCSSKeyword_COUNT, "kCSSRawKeywords and eCSSKeyword_COUNT are out of sync");
#endif
  }
}

void
nsCSSKeywords::ReleaseTable(void)
{
  if (0 == --gKeywordTableRefCount) {
    if (gKeywordTable) {
      delete gKeywordTable;
      gKeywordTable = nullptr;
    }
  }
}

nsCSSKeyword
nsCSSKeywords::LookupKeyword(const nsACString& aKeyword)
{
  NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
  if (gKeywordTable) {
    return nsCSSKeyword(gKeywordTable->Lookup(aKeyword));
  }
  return eCSSKeyword_UNKNOWN;
}

nsCSSKeyword
nsCSSKeywords::LookupKeyword(const nsAString& aKeyword)
{
  NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
  if (gKeywordTable) {
    return nsCSSKeyword(gKeywordTable->Lookup(aKeyword));
  }
  return eCSSKeyword_UNKNOWN;
}

const nsCString&
nsCSSKeywords::GetStringValue(nsCSSKeyword aKeyword)
{
  NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
  NS_ASSERTION(0 <= aKeyword && aKeyword < eCSSKeyword_COUNT, "out of range");
  if (gKeywordTable) {
    return gKeywordTable->GetStringValue(int32_t(aKeyword));
  } else {
    static nsDependentCString kNullStr("");
    return kNullStr;
  }
}