1/*
2 * Copyright (C) 2010, 2011 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "WebPreferencesStore.h"
28
29#include "FontSmoothingLevel.h"
30#include "WebCoreArgumentCoders.h"
31#include "WebPreferencesKeys.h"
32#include <WebCore/Settings.h>
33#include <WebCore/TextEncodingRegistry.h>
34#include <wtf/NeverDestroyed.h>
35
36#if PLATFORM(IOS)
37#import <WebKitSystemInterfaceIOS.h>
38#endif
39
40using namespace WebCore;
41
42namespace WebKit {
43
44typedef HashMap<String, bool> BoolOverridesMap;
45
46static BoolOverridesMap& boolTestRunnerOverridesMap()
47{
48    static NeverDestroyed<BoolOverridesMap> map;
49    return map;
50}
51
52void WebPreferencesStore::Value::encode(IPC::ArgumentEncoder& encoder) const
53{
54    encoder.encodeEnum(m_type);
55
56    switch (m_type) {
57    case Type::None:
58        break;
59    case Type::String:
60        encoder << m_string;
61        break;
62    case Type::Bool:
63        encoder << m_bool;
64        break;
65    case Type::UInt32:
66        encoder << m_uint32;
67        break;
68    case Type::Double:
69        encoder << m_double;
70        break;
71    }
72}
73
74bool WebPreferencesStore::Value::decode(IPC::ArgumentDecoder& decoder, Value& result)
75{
76    Value::Type type;
77    if (!decoder.decodeEnum(type))
78        return false;
79
80    switch (type) {
81    case Type::None:
82        break;
83    case Type::String: {
84        String value;
85        if (!decoder.decode(value))
86            return false;
87        result = Value(value);
88        break;
89    }
90    case Type::Bool: {
91        bool value;
92        if (!decoder.decode(value))
93            return false;
94        result = Value(value);
95        break;
96    }
97    case Type::UInt32: {
98        uint32_t value;
99        if (!decoder.decode(value))
100            return false;
101        result = Value(value);
102        break;
103    }
104    case Type::Double: {
105        double value;
106        if (!decoder.decode(value))
107            return false;
108        result = Value(value);
109        break;
110    }
111    default:
112        return false;
113    }
114
115    return true;
116}
117
118WebPreferencesStore::WebPreferencesStore()
119{
120}
121
122void WebPreferencesStore::encode(IPC::ArgumentEncoder& encoder) const
123{
124    encoder << m_values;
125    encoder << m_overridenDefaults;
126}
127
128bool WebPreferencesStore::decode(IPC::ArgumentDecoder& decoder, WebPreferencesStore& result)
129{
130    if (!decoder.decode(result.m_values))
131        return false;
132    if (!decoder.decode(result.m_overridenDefaults))
133        return false;
134    return true;
135}
136
137void WebPreferencesStore::overrideBoolValueForKey(const String& key, bool value)
138{
139    boolTestRunnerOverridesMap().set(key, value);
140}
141
142void WebPreferencesStore::removeTestRunnerOverrides()
143{
144    boolTestRunnerOverridesMap().clear();
145}
146
147template <typename T> struct ToType { };
148
149template<> struct ToType<String> { static const auto value = WebPreferencesStore::Value::Type::String; };
150template<> struct ToType<bool> { static const auto value = WebPreferencesStore::Value::Type::Bool; };
151template<> struct ToType<uint32_t> { static const auto value = WebPreferencesStore::Value::Type::UInt32; };
152template<> struct ToType<double> { static const auto value = WebPreferencesStore::Value::Type::Double; };
153
154
155template<typename MappedType> MappedType as(const WebPreferencesStore::Value&);
156
157template<> String as<String>(const WebPreferencesStore::Value& value) { return value.asString(); }
158template<> bool as<bool>(const WebPreferencesStore::Value& value) { return value.asBool(); }
159template<> uint32_t as<uint32_t>(const WebPreferencesStore::Value& value) { return value.asUInt32(); }
160template<> double as<double>(const WebPreferencesStore::Value& value) { return value.asDouble(); }
161
162
163static WebPreferencesStore::ValueMap& defaults()
164{
165    static NeverDestroyed<WebPreferencesStore::ValueMap> defaults;
166    if (defaults.get().isEmpty()) {
167#define DEFINE_DEFAULTS(KeyUpper, KeyLower, TypeName, Type, DefaultValue) defaults.get().set(WebPreferencesKey::KeyLower##Key(), WebPreferencesStore::Value((Type)DefaultValue));
168        FOR_EACH_WEBKIT_PREFERENCE(DEFINE_DEFAULTS)
169        FOR_EACH_WEBKIT_DEBUG_PREFERENCE(DEFINE_DEFAULTS)
170#undef DEFINE_DEFAULTS
171    }
172
173    return defaults;
174}
175
176template<typename MappedType>
177static MappedType valueForKey(const WebPreferencesStore::ValueMap& values, const WebPreferencesStore::ValueMap& overridenDefaults, const String& key)
178{
179    auto valuesIt = values.find(key);
180    if (valuesIt != values.end() && valuesIt->value.type() == ToType<MappedType>::value)
181        return as<MappedType>(valuesIt->value);
182
183    auto overridenDefaultsIt = overridenDefaults.find(key);
184    if (overridenDefaultsIt != overridenDefaults.end() && overridenDefaultsIt->value.type() == ToType<MappedType>::value)
185        return as<MappedType>(overridenDefaultsIt->value);
186
187    auto defaultsMap = defaults();
188    auto defaultsIt = defaultsMap.find(key);
189    if (defaultsIt != defaultsMap.end() && defaultsIt->value.type() == ToType<MappedType>::value)
190        return as<MappedType>(defaultsIt->value);
191
192    return MappedType();
193}
194
195template<typename MappedType>
196static bool setValueForKey(WebPreferencesStore::ValueMap& map, const WebPreferencesStore::ValueMap& overridenDefaults, const String& key, const MappedType& value)
197{
198    MappedType existingValue = valueForKey<MappedType>(map, overridenDefaults, key);
199    if (existingValue == value)
200        return false;
201
202    map.set(key, WebPreferencesStore::Value(value));
203    return true;
204}
205
206bool WebPreferencesStore::setStringValueForKey(const String& key, const String& value)
207{
208    return setValueForKey<String>(m_values, m_overridenDefaults, key, value);
209}
210
211String WebPreferencesStore::getStringValueForKey(const String& key) const
212{
213    return valueForKey<String>(m_values, m_overridenDefaults, key);
214}
215
216bool WebPreferencesStore::setBoolValueForKey(const String& key, bool value)
217{
218    return setValueForKey<bool>(m_values, m_overridenDefaults, key, value);
219}
220
221bool WebPreferencesStore::getBoolValueForKey(const String& key) const
222{
223    // FIXME: Extend overriding to other key types used from TestRunner.
224    auto it = boolTestRunnerOverridesMap().find(key);
225    if (it != boolTestRunnerOverridesMap().end())
226        return it->value;
227
228    return valueForKey<bool>(m_values, m_overridenDefaults, key);
229}
230
231bool WebPreferencesStore::setUInt32ValueForKey(const String& key, uint32_t value)
232{
233    return setValueForKey<uint32_t>(m_values, m_overridenDefaults, key, value);
234}
235
236uint32_t WebPreferencesStore::getUInt32ValueForKey(const String& key) const
237{
238    return valueForKey<uint32_t>(m_values, m_overridenDefaults, key);
239}
240
241bool WebPreferencesStore::setDoubleValueForKey(const String& key, double value)
242{
243    return setValueForKey<double>(m_values, m_overridenDefaults, key, value);
244}
245
246double WebPreferencesStore::getDoubleValueForKey(const String& key) const
247{
248    return valueForKey<double>(m_values, m_overridenDefaults, key);
249}
250
251// Overriden Defaults
252
253void WebPreferencesStore::setOverrideDefaultsStringValueForKey(const String& key, String value)
254{
255    m_overridenDefaults.set(key, Value(value));
256}
257
258void WebPreferencesStore::setOverrideDefaultsBoolValueForKey(const String& key, bool value)
259{
260    m_overridenDefaults.set(key, Value(value));
261}
262
263void WebPreferencesStore::setOverrideDefaultsUInt32ValueForKey(const String& key, uint32_t value)
264{
265    m_overridenDefaults.set(key, Value(value));
266}
267
268void WebPreferencesStore::setOverrideDefaultsDoubleValueForKey(const String& key, double value)
269{
270    m_overridenDefaults.set(key, Value(value));
271}
272
273} // namespace WebKit
274