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// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "webkit/glue/entity_map.h"
#include <hash_map>
#include "HTMLEntityCodes.c"
#include "base/string_util.h"
namespace webkit_glue {
typedef stdext::hash_map<wchar_t, const char*> EntityMapType;
class EntityMapData {
public:
EntityMapData(const EntityCode* entity_codes, int entity_codes_length,
bool user_number_entity_apos)
: entity_codes_(entity_codes),
entity_codes_length_(entity_codes_length),
user_number_entity_apos_(user_number_entity_apos),
map_(NULL) {
}
~EntityMapData() { delete map_; }
const EntityMapType* GetEntityMapData();
private:
// Data structure which saves all pairs of Unicode character and its
// corresponding entity notation.
const EntityCode* entity_codes_;
const int entity_codes_length_;
// IE does not support '''(html entity name for symbol ') as HTML entity
// (but it does support ' as xml entity), so if user_number_entity_apos_
// is true, we will use entity number 0x0027 instead of using ''' when
// doing serialization work.
const bool user_number_entity_apos_;
// Map the Unicode character to corresponding entity notation.
EntityMapType* map_;
DISALLOW_EVIL_CONSTRUCTORS(EntityMapData);
};
const EntityMapType* EntityMapData::GetEntityMapData() {
if (!map_) {
// lazily create the entity map.
map_ = new EntityMapType;
const EntityCode* entity_code = &entity_codes_[0];
for (int i = 0; i < entity_codes_length_; ++i, ++entity_code)
(*map_)[entity_code->code] = entity_code->name;
if (user_number_entity_apos_)
(*map_)[0x0027] = "'";
}
return map_;
}
static const EntityCode xml_built_in_entity_codes[] = {
{0x003c, "<"},
{0x003e, ">"},
{0x0026, "&"},
{0x0027, "'"},
{0x0022, """}
};
static const int xml_entity_codes_length =
arraysize(xml_built_in_entity_codes);
static EntityMapData html_entity_map_singleton(entity_codes,
entity_codes_length,
true);
static EntityMapData xml_entity_map_singleton(xml_built_in_entity_codes,
xml_entity_codes_length,
false);
const char* EntityMap::GetEntityNameByCode(wchar_t code, bool is_html) {
const EntityMapType* entity_map;
if (is_html)
entity_map = html_entity_map_singleton.GetEntityMapData();
else
entity_map = xml_entity_map_singleton.GetEntityMapData();
// Check entity name according to unicode.
EntityMapType::const_iterator i = entity_map->find(code);
if (i == entity_map->end())
// Not found, return NULL.
return NULL;
else
// Found, return entity notation.
return i->second;
}
} // namespace webkit_glue
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