1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "chrome/browser/ui/prefs/prefs_tab_helper.h"
9 #include "base/prefs/overlay_user_pref_store.h"
10 #include "base/prefs/pref_service.h"
11 #include "base/strings/string_util.h"
12 #include "base/strings/stringprintf.h"
13 #include "base/strings/utf_string_conversions.h"
14 #include "chrome/browser/browser_process.h"
15 #include "chrome/browser/chrome_notification_types.h"
16 #include "chrome/browser/profiles/profile.h"
17 #include "chrome/browser/renderer_preferences_util.h"
18 #include "chrome/browser/ui/zoom/chrome_zoom_level_prefs.h"
19 #include "chrome/browser/ui/zoom/zoom_controller.h"
20 #include "chrome/common/pref_font_webkit_names.h"
21 #include "chrome/common/pref_names.h"
22 #include "chrome/common/pref_names_util.h"
23 #include "chrome/grit/locale_settings.h"
24 #include "components/pref_registry/pref_registry_syncable.h"
25 #include "content/public/browser/notification_details.h"
26 #include "content/public/browser/notification_service.h"
27 #include "content/public/browser/render_view_host.h"
28 #include "content/public/browser/web_contents.h"
29 #include "content/public/common/renderer_preferences.h"
30 #include "content/public/common/web_preferences.h"
31 #include "grit/platform_locale_settings.h"
32 #include "third_party/icu/source/common/unicode/uchar.h"
33 #include "third_party/icu/source/common/unicode/uscript.h"
34 #include "ui/base/l10n/l10n_util.h"
36 #if defined(OS_POSIX) && !defined(OS_MACOSX) && defined(ENABLE_THEMES)
37 #include "chrome/browser/themes/theme_service.h"
38 #include "chrome/browser/themes/theme_service_factory.h"
42 #include "base/win/windows_version.h"
45 using content::WebContents;
46 using content::WebPreferences;
48 DEFINE_WEB_CONTENTS_USER_DATA_KEY(PrefsTabHelper);
52 // The list of prefs we want to observe.
53 const char* kPrefsToObserve[] = {
54 prefs::kDefaultCharset,
55 prefs::kDisable3DAPIs,
56 prefs::kEnableHyperlinkAuditing,
57 prefs::kWebKitAllowDisplayingInsecureContent,
58 prefs::kWebKitAllowRunningInsecureContent,
59 prefs::kWebKitDefaultFixedFontSize,
60 prefs::kWebKitDefaultFontSize,
61 prefs::kWebKitDomPasteEnabled,
62 #if defined(OS_ANDROID)
63 prefs::kWebKitFontScaleFactor,
64 prefs::kWebKitForceEnableZoom,
65 prefs::kWebKitPasswordEchoEnabled,
67 prefs::kWebKitJavascriptCanOpenWindowsAutomatically,
68 prefs::kWebKitJavascriptEnabled,
69 prefs::kWebKitJavaEnabled,
70 prefs::kWebKitLoadsImagesAutomatically,
71 prefs::kWebKitMinimumFontSize,
72 prefs::kWebKitMinimumLogicalFontSize,
73 prefs::kWebKitPluginsEnabled,
74 prefs::kWebKitShrinksStandaloneImagesToFit,
75 prefs::kWebkitTabsToLinks,
76 prefs::kWebKitTextAreasAreResizable,
77 prefs::kWebKitUsesUniversalDetector,
78 prefs::kWebKitWebSecurityEnabled,
81 const int kPrefsToObserveLength = arraysize(kPrefsToObserve);
83 #if !defined(OS_ANDROID)
84 // Registers a preference under the path |pref_name| for each script used for
85 // per-script font prefs.
86 // For example, for WEBKIT_WEBPREFS_FONTS_SERIF ("fonts.serif"):
87 // "fonts.serif.Arab", "fonts.serif.Hang", etc. are registered.
88 // |fonts_with_defaults| contains all |pref_names| already registered since they
89 // have a specified default value.
90 // On Android there are no default values for these properties and there is no
91 // way to set them (because extensions are not supported so the Font Settings
92 // API cannot be used), so we can avoid registering them altogether.
93 void RegisterFontFamilyPrefs(user_prefs::PrefRegistrySyncable* registry,
94 const std::set<std::string>& fonts_with_defaults) {
96 // Expand the font concatenated with script name so this stays at RO memory
97 // rather than allocated in heap.
98 static const char* const kFontFamilyMap[] = {
99 #define EXPAND_SCRIPT_FONT(map_name, script_name) map_name "." script_name,
101 #include "chrome/common/pref_font_script_names-inl.h"
102 ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_CURSIVE)
103 ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_FANTASY)
104 ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_FIXED)
105 ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_PICTOGRAPH)
106 ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_SANSERIF)
107 ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_SERIF)
108 ALL_FONT_SCRIPTS(WEBKIT_WEBPREFS_FONTS_STANDARD)
110 #undef EXPAND_SCRIPT_FONT
113 for (size_t i = 0; i < arraysize(kFontFamilyMap); ++i) {
114 const char* pref_name = kFontFamilyMap[i];
115 if (fonts_with_defaults.find(pref_name) == fonts_with_defaults.end()) {
116 // We haven't already set a default value for this font preference, so set
117 // an empty string as the default.
118 registry->RegisterStringPref(
121 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
125 #endif // !defined(OS_ANDROID)
127 // Registers |obs| to observe per-script font prefs under the path |map_name|.
128 // On android, there's no exposed way to change these prefs, so we can save
129 // ~715KB of heap and some startup cycles by avoiding observing these prefs
130 // since they will never change.
131 void RegisterFontFamilyMapObserver(
132 PrefChangeRegistrar* registrar,
133 const char* map_name,
134 const PrefChangeRegistrar::NamedChangeCallback& obs) {
135 DCHECK(StartsWithASCII(map_name, "webkit.webprefs.", true));
136 for (size_t i = 0; i < prefs::kWebKitScriptsForFontFamilyMapsLength; ++i) {
137 const char* script = prefs::kWebKitScriptsForFontFamilyMaps[i];
138 std::string pref_name = base::StringPrintf("%s.%s", map_name, script);
139 registrar->Add(pref_name.c_str(), obs);
144 // On Windows with antialising we want to use an alternate fixed font like
145 // Consolas, which looks much better than Courier New.
146 bool ShouldUseAlternateDefaultFixedFont(const std::string& script) {
147 if (!StartsWithASCII(script, "courier", false))
149 UINT smooth_type = 0;
150 SystemParametersInfo(SPI_GETFONTSMOOTHINGTYPE, 0, &smooth_type, 0);
151 return (base::win::GetVersion() >= base::win::VERSION_WIN7) &&
152 (smooth_type == FE_FONTSMOOTHINGCLEARTYPE);
157 const char* pref_name;
161 // Font pref defaults. The prefs that have defaults vary by platform, since not
162 // all platforms have fonts for all scripts for all generic families.
163 // TODO(falken): add proper defaults when possible for all
164 // platforms/scripts/generic families.
165 const FontDefault kFontDefaults[] = {
166 { prefs::kWebKitStandardFontFamily, IDS_STANDARD_FONT_FAMILY },
167 { prefs::kWebKitFixedFontFamily, IDS_FIXED_FONT_FAMILY },
168 { prefs::kWebKitSerifFontFamily, IDS_SERIF_FONT_FAMILY },
169 { prefs::kWebKitSansSerifFontFamily, IDS_SANS_SERIF_FONT_FAMILY },
170 { prefs::kWebKitCursiveFontFamily, IDS_CURSIVE_FONT_FAMILY },
171 { prefs::kWebKitFantasyFontFamily, IDS_FANTASY_FONT_FAMILY },
172 { prefs::kWebKitPictographFontFamily, IDS_PICTOGRAPH_FONT_FAMILY },
173 #if defined(OS_CHROMEOS) || defined(OS_MACOSX) || defined(OS_WIN)
174 { prefs::kWebKitStandardFontFamilyJapanese,
175 IDS_STANDARD_FONT_FAMILY_JAPANESE },
176 { prefs::kWebKitFixedFontFamilyJapanese, IDS_FIXED_FONT_FAMILY_JAPANESE },
177 { prefs::kWebKitSerifFontFamilyJapanese, IDS_SERIF_FONT_FAMILY_JAPANESE },
178 { prefs::kWebKitSansSerifFontFamilyJapanese,
179 IDS_SANS_SERIF_FONT_FAMILY_JAPANESE },
180 { prefs::kWebKitStandardFontFamilyKorean, IDS_STANDARD_FONT_FAMILY_KOREAN },
181 { prefs::kWebKitSerifFontFamilyKorean, IDS_SERIF_FONT_FAMILY_KOREAN },
182 { prefs::kWebKitSansSerifFontFamilyKorean,
183 IDS_SANS_SERIF_FONT_FAMILY_KOREAN },
184 { prefs::kWebKitStandardFontFamilySimplifiedHan,
185 IDS_STANDARD_FONT_FAMILY_SIMPLIFIED_HAN },
186 { prefs::kWebKitSerifFontFamilySimplifiedHan,
187 IDS_SERIF_FONT_FAMILY_SIMPLIFIED_HAN },
188 { prefs::kWebKitSansSerifFontFamilySimplifiedHan,
189 IDS_SANS_SERIF_FONT_FAMILY_SIMPLIFIED_HAN },
190 { prefs::kWebKitStandardFontFamilyTraditionalHan,
191 IDS_STANDARD_FONT_FAMILY_TRADITIONAL_HAN },
192 { prefs::kWebKitSerifFontFamilyTraditionalHan,
193 IDS_SERIF_FONT_FAMILY_TRADITIONAL_HAN },
194 { prefs::kWebKitSansSerifFontFamilyTraditionalHan,
195 IDS_SANS_SERIF_FONT_FAMILY_TRADITIONAL_HAN },
197 #if defined(OS_CHROMEOS)
198 { prefs::kWebKitStandardFontFamilyArabic, IDS_STANDARD_FONT_FAMILY_ARABIC },
199 { prefs::kWebKitSerifFontFamilyArabic, IDS_SERIF_FONT_FAMILY_ARABIC },
200 { prefs::kWebKitSansSerifFontFamilyArabic,
201 IDS_SANS_SERIF_FONT_FAMILY_ARABIC },
202 { prefs::kWebKitFixedFontFamilyKorean, IDS_FIXED_FONT_FAMILY_KOREAN },
203 { prefs::kWebKitFixedFontFamilySimplifiedHan,
204 IDS_FIXED_FONT_FAMILY_SIMPLIFIED_HAN },
205 { prefs::kWebKitFixedFontFamilyTraditionalHan,
206 IDS_FIXED_FONT_FAMILY_TRADITIONAL_HAN },
207 #elif defined(OS_WIN)
208 { prefs::kWebKitSansSerifFontFamilyArabic,
209 IDS_SANS_SERIF_FONT_FAMILY_ARABIC },
210 { prefs::kWebKitStandardFontFamilyCyrillic,
211 IDS_STANDARD_FONT_FAMILY_CYRILLIC },
212 { prefs::kWebKitFixedFontFamilyCyrillic, IDS_FIXED_FONT_FAMILY_CYRILLIC },
213 { prefs::kWebKitSerifFontFamilyCyrillic, IDS_SERIF_FONT_FAMILY_CYRILLIC },
214 { prefs::kWebKitSansSerifFontFamilyCyrillic,
215 IDS_SANS_SERIF_FONT_FAMILY_CYRILLIC },
216 { prefs::kWebKitStandardFontFamilyGreek, IDS_STANDARD_FONT_FAMILY_GREEK },
217 { prefs::kWebKitFixedFontFamilyGreek, IDS_FIXED_FONT_FAMILY_GREEK },
218 { prefs::kWebKitSerifFontFamilyGreek, IDS_SERIF_FONT_FAMILY_GREEK },
219 { prefs::kWebKitSansSerifFontFamilyGreek, IDS_SANS_SERIF_FONT_FAMILY_GREEK },
220 { prefs::kWebKitFixedFontFamilyKorean, IDS_FIXED_FONT_FAMILY_KOREAN },
221 { prefs::kWebKitCursiveFontFamilyKorean, IDS_CURSIVE_FONT_FAMILY_KOREAN },
222 { prefs::kWebKitFixedFontFamilySimplifiedHan,
223 IDS_FIXED_FONT_FAMILY_SIMPLIFIED_HAN },
224 { prefs::kWebKitFixedFontFamilyTraditionalHan,
225 IDS_FIXED_FONT_FAMILY_TRADITIONAL_HAN },
229 const size_t kFontDefaultsLength = arraysize(kFontDefaults);
231 // Returns the script of the font pref |pref_name|. For example, suppose
232 // |pref_name| is "webkit.webprefs.fonts.serif.Hant". Since the script code for
233 // the script name "Hant" is USCRIPT_TRADITIONAL_HAN, the function returns
234 // USCRIPT_TRADITIONAL_HAN. |pref_name| must be a valid font pref name.
235 UScriptCode GetScriptOfFontPref(const char* pref_name) {
236 // ICU script names are four letters.
237 static const size_t kScriptNameLength = 4;
239 size_t len = strlen(pref_name);
240 DCHECK_GT(len, kScriptNameLength);
241 const char* scriptName = &pref_name[len - kScriptNameLength];
242 int32 code = u_getPropertyValueEnum(UCHAR_SCRIPT, scriptName);
243 DCHECK(code >= 0 && code < USCRIPT_CODE_LIMIT);
244 return static_cast<UScriptCode>(code);
247 // If |scriptCode| is a member of a family of "similar" script codes, returns
248 // the script code in that family that is used in font pref names. For example,
249 // USCRIPT_HANGUL and USCRIPT_KOREAN are considered equivalent for the purposes
250 // of font selection. Chrome uses the script code USCRIPT_HANGUL (script name
251 // "Hang") in Korean font pref names (for example,
252 // "webkit.webprefs.fonts.serif.Hang"). So, if |scriptCode| is USCRIPT_KOREAN,
253 // the function returns USCRIPT_HANGUL. If |scriptCode| is not a member of such
254 // a family, returns |scriptCode|.
255 UScriptCode GetScriptForFontPrefMatching(UScriptCode scriptCode) {
256 switch (scriptCode) {
257 case USCRIPT_HIRAGANA:
258 case USCRIPT_KATAKANA:
259 case USCRIPT_KATAKANA_OR_HIRAGANA:
260 return USCRIPT_JAPANESE;
262 return USCRIPT_HANGUL;
268 // Returns the primary script used by the browser's UI locale. For example, if
269 // the locale is "ru", the function returns USCRIPT_CYRILLIC, and if the locale
270 // is "en", the function returns USCRIPT_LATIN.
271 UScriptCode GetScriptOfBrowserLocale() {
272 std::string locale = g_browser_process->GetApplicationLocale();
274 // For Chinese locales, uscript_getCode() just returns USCRIPT_HAN but our
275 // per-script fonts are for USCRIPT_SIMPLIFIED_HAN and
276 // USCRIPT_TRADITIONAL_HAN.
277 if (locale == "zh-CN")
278 return USCRIPT_SIMPLIFIED_HAN;
279 if (locale == "zh-TW")
280 return USCRIPT_TRADITIONAL_HAN;
282 UScriptCode code = USCRIPT_INVALID_CODE;
283 UErrorCode err = U_ZERO_ERROR;
284 uscript_getCode(locale.c_str(), &code, 1, &err);
286 // Ignore the error that multiple scripts could be returned, since we only
288 if (U_FAILURE(err) && err != U_BUFFER_OVERFLOW_ERROR)
289 code = USCRIPT_INVALID_CODE;
290 return GetScriptForFontPrefMatching(code);
293 // Sets a font family pref in |prefs| to |pref_value|.
294 void OverrideFontFamily(WebPreferences* prefs,
295 const std::string& generic_family,
296 const std::string& script,
297 const std::string& pref_value) {
298 content::ScriptFontFamilyMap* map = NULL;
299 if (generic_family == "standard")
300 map = &prefs->standard_font_family_map;
301 else if (generic_family == "fixed")
302 map = &prefs->fixed_font_family_map;
303 else if (generic_family == "serif")
304 map = &prefs->serif_font_family_map;
305 else if (generic_family == "sansserif")
306 map = &prefs->sans_serif_font_family_map;
307 else if (generic_family == "cursive")
308 map = &prefs->cursive_font_family_map;
309 else if (generic_family == "fantasy")
310 map = &prefs->fantasy_font_family_map;
311 else if (generic_family == "pictograph")
312 map = &prefs->pictograph_font_family_map;
314 NOTREACHED() << "Unknown generic font family: " << generic_family;
315 (*map)[script] = base::UTF8ToUTF16(pref_value);
320 PrefsTabHelper::PrefsTabHelper(WebContents* contents)
321 : web_contents_(contents),
322 weak_ptr_factory_(this) {
323 PrefService* prefs = GetProfile()->GetPrefs();
324 pref_change_registrar_.Init(prefs);
326 // TODO(wjmaclean): Convert this to use the content-specific zoom-level
327 // prefs when HostZoomMap moves to StoragePartition.
328 chrome::ChromeZoomLevelPrefs* zoom_level_prefs =
329 GetProfile()->GetZoomLevelPrefs();
331 base::Closure renderer_callback = base::Bind(
332 &PrefsTabHelper::UpdateRendererPreferences, base::Unretained(this));
333 // Incognito mode does not have a zoom_level_prefs, and not all tests
334 // should need to create one either.
335 if (zoom_level_prefs) {
336 default_zoom_level_subscription_ =
337 zoom_level_prefs->RegisterDefaultZoomLevelCallback(renderer_callback);
339 pref_change_registrar_.Add(prefs::kAcceptLanguages, renderer_callback);
340 pref_change_registrar_.Add(prefs::kEnableDoNotTrack, renderer_callback);
341 pref_change_registrar_.Add(prefs::kEnableReferrers, renderer_callback);
343 #if !defined(OS_MACOSX)
344 pref_change_registrar_.Add(prefs::kFullscreenAllowed, renderer_callback);
347 PrefChangeRegistrar::NamedChangeCallback webkit_callback = base::Bind(
348 &PrefsTabHelper::OnWebPrefChanged, base::Unretained(this));
349 for (int i = 0; i < kPrefsToObserveLength; ++i) {
350 const char* pref_name = kPrefsToObserve[i];
351 pref_change_registrar_.Add(pref_name, webkit_callback);
354 RegisterFontFamilyMapObserver(&pref_change_registrar_,
355 prefs::kWebKitStandardFontFamilyMap,
357 RegisterFontFamilyMapObserver(&pref_change_registrar_,
358 prefs::kWebKitFixedFontFamilyMap,
360 RegisterFontFamilyMapObserver(&pref_change_registrar_,
361 prefs::kWebKitSerifFontFamilyMap,
363 RegisterFontFamilyMapObserver(&pref_change_registrar_,
364 prefs::kWebKitSansSerifFontFamilyMap,
366 RegisterFontFamilyMapObserver(&pref_change_registrar_,
367 prefs::kWebKitCursiveFontFamilyMap,
369 RegisterFontFamilyMapObserver(&pref_change_registrar_,
370 prefs::kWebKitFantasyFontFamilyMap,
372 RegisterFontFamilyMapObserver(&pref_change_registrar_,
373 prefs::kWebKitPictographFontFamilyMap,
377 content::RendererPreferences* render_prefs =
378 web_contents_->GetMutableRendererPrefs();
379 renderer_preferences_util::UpdateFromSystemSettings(render_prefs,
383 #if defined(OS_POSIX) && !defined(OS_MACOSX) && defined(ENABLE_THEMES)
385 chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
386 content::Source<ThemeService>(
387 ThemeServiceFactory::GetForProfile(GetProfile())));
389 #if defined(USE_AURA)
391 chrome::NOTIFICATION_BROWSER_FLING_CURVE_PARAMETERS_CHANGED,
392 content::NotificationService::AllSources());
396 PrefsTabHelper::~PrefsTabHelper() {
400 void PrefsTabHelper::InitIncognitoUserPrefStore(
401 OverlayUserPrefStore* pref_store) {
402 // List of keys that cannot be changed in the user prefs file by the incognito
403 // profile. All preferences that store information about the browsing history
404 // or behavior of the user should have this property.
405 pref_store->RegisterOverlayPref(prefs::kBrowserWindowPlacement);
406 pref_store->RegisterOverlayPref(prefs::kSaveFileDefaultDirectory);
407 #if defined(OS_ANDROID) || defined(OS_IOS)
408 pref_store->RegisterOverlayPref(prefs::kProxy);
409 #endif // defined(OS_ANDROID) || defined(OS_IOS)
413 void PrefsTabHelper::RegisterProfilePrefs(
414 user_prefs::PrefRegistrySyncable* registry) {
415 WebPreferences pref_defaults;
416 registry->RegisterBooleanPref(
417 prefs::kWebKitJavascriptEnabled,
418 pref_defaults.javascript_enabled,
419 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
420 registry->RegisterBooleanPref(
421 prefs::kWebKitWebSecurityEnabled,
422 pref_defaults.web_security_enabled,
423 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
424 registry->RegisterBooleanPref(
425 prefs::kWebKitJavascriptCanOpenWindowsAutomatically,
427 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
428 registry->RegisterBooleanPref(
429 prefs::kWebKitLoadsImagesAutomatically,
430 pref_defaults.loads_images_automatically,
431 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
432 registry->RegisterBooleanPref(
433 prefs::kWebKitPluginsEnabled,
434 pref_defaults.plugins_enabled,
435 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
436 registry->RegisterBooleanPref(
437 prefs::kWebKitDomPasteEnabled,
438 pref_defaults.dom_paste_enabled,
439 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
440 registry->RegisterBooleanPref(
441 prefs::kWebKitShrinksStandaloneImagesToFit,
442 pref_defaults.shrinks_standalone_images_to_fit,
443 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
444 registry->RegisterBooleanPref(
445 prefs::kWebKitTextAreasAreResizable,
446 pref_defaults.text_areas_are_resizable,
447 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
448 registry->RegisterBooleanPref(
449 prefs::kWebKitJavaEnabled,
450 pref_defaults.java_enabled,
451 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
452 registry->RegisterBooleanPref(
453 prefs::kWebkitTabsToLinks,
454 pref_defaults.tabs_to_links,
455 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
456 registry->RegisterBooleanPref(
457 prefs::kWebKitAllowRunningInsecureContent,
459 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
460 registry->RegisterBooleanPref(
461 prefs::kWebKitAllowDisplayingInsecureContent,
463 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
464 registry->RegisterBooleanPref(
465 prefs::kEnableReferrers,
467 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
468 #if defined(OS_ANDROID)
469 registry->RegisterDoublePref(
470 prefs::kWebKitFontScaleFactor,
472 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
473 registry->RegisterBooleanPref(
474 prefs::kWebKitForceEnableZoom,
475 pref_defaults.force_enable_zoom,
476 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
477 registry->RegisterBooleanPref(
478 prefs::kWebKitPasswordEchoEnabled,
479 pref_defaults.password_echo_enabled,
480 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
482 registry->RegisterLocalizedStringPref(
483 prefs::kAcceptLanguages,
484 IDS_ACCEPT_LANGUAGES,
485 user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
486 registry->RegisterLocalizedStringPref(
487 prefs::kDefaultCharset,
488 IDS_DEFAULT_ENCODING,
489 user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
491 // Register font prefs that have defaults.
492 std::set<std::string> fonts_with_defaults;
493 UScriptCode browser_script = GetScriptOfBrowserLocale();
494 for (size_t i = 0; i < kFontDefaultsLength; ++i) {
495 FontDefault pref = kFontDefaults[i];
498 if (pref.pref_name == prefs::kWebKitFixedFontFamily) {
499 if (ShouldUseAlternateDefaultFixedFont(
500 l10n_util::GetStringUTF8(pref.resource_id)))
501 pref.resource_id = IDS_FIXED_FONT_FAMILY_ALT_WIN;
505 UScriptCode pref_script = GetScriptOfFontPref(pref.pref_name);
507 // Suppress this default font pref value if it is for the primary script of
508 // the browser's UI locale. For example, if the pref is for the sans-serif
509 // font for the Cyrillic script, and the browser locale is "ru" (Russian),
510 // the default is suppressed. Otherwise, the default would override the
511 // user's font preferences when viewing pages in their native language.
512 // This is because users have no way yet of customizing their per-script
513 // font preferences. The font prefs accessible in the options UI are for
514 // the default, unknown script; these prefs have less priority than the
515 // per-script font prefs when the script of the content is known. This code
516 // can possibly be removed later if users can easily access per-script font
517 // prefs (e.g., via the extensions workflow), or the problem turns out to
518 // not be really critical after all.
519 if (browser_script != pref_script) {
520 registry->RegisterLocalizedStringPref(
523 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
524 fonts_with_defaults.insert(pref.pref_name);
528 // Register per-script font prefs that don't have defaults.
529 #if !defined(OS_ANDROID)
530 RegisterFontFamilyPrefs(registry, fonts_with_defaults);
533 registry->RegisterLocalizedIntegerPref(
534 prefs::kWebKitDefaultFontSize,
535 IDS_DEFAULT_FONT_SIZE,
536 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
537 registry->RegisterLocalizedIntegerPref(
538 prefs::kWebKitDefaultFixedFontSize,
539 IDS_DEFAULT_FIXED_FONT_SIZE,
540 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
541 registry->RegisterLocalizedIntegerPref(
542 prefs::kWebKitMinimumFontSize,
543 IDS_MINIMUM_FONT_SIZE,
544 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
545 registry->RegisterLocalizedIntegerPref(
546 prefs::kWebKitMinimumLogicalFontSize,
547 IDS_MINIMUM_LOGICAL_FONT_SIZE,
548 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
549 registry->RegisterLocalizedBooleanPref(
550 prefs::kWebKitUsesUniversalDetector,
551 IDS_USES_UNIVERSAL_DETECTOR,
552 user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
553 registry->RegisterLocalizedStringPref(
554 prefs::kStaticEncodings,
555 IDS_STATIC_ENCODING_LIST,
556 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
557 registry->RegisterStringPref(
558 prefs::kRecentlySelectedEncoding,
560 user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
563 void PrefsTabHelper::Observe(int type,
564 const content::NotificationSource& source,
565 const content::NotificationDetails& details) {
566 #if defined(OS_POSIX) && !defined(OS_MACOSX) && defined(ENABLE_THEMES)
567 if (type == chrome::NOTIFICATION_BROWSER_THEME_CHANGED) {
568 UpdateRendererPreferences();
573 #if defined(USE_AURA)
574 if (type == chrome::NOTIFICATION_BROWSER_FLING_CURVE_PARAMETERS_CHANGED) {
575 UpdateRendererPreferences();
578 #endif // defined(USE_AURA)
583 void PrefsTabHelper::UpdateWebPreferences() {
584 web_contents_->GetRenderViewHost()->UpdateWebkitPreferences(
585 web_contents_->GetRenderViewHost()->GetWebkitPreferences());
588 void PrefsTabHelper::UpdateRendererPreferences() {
589 content::RendererPreferences* prefs =
590 web_contents_->GetMutableRendererPrefs();
591 renderer_preferences_util::UpdateFromSystemSettings(
592 prefs, GetProfile(), web_contents_);
593 web_contents_->GetRenderViewHost()->SyncRendererPrefs();
596 Profile* PrefsTabHelper::GetProfile() {
597 return Profile::FromBrowserContext(web_contents_->GetBrowserContext());
600 void PrefsTabHelper::OnFontFamilyPrefChanged(const std::string& pref_name) {
601 // When a font family pref's value goes from non-empty to the empty string, we
602 // must add it to the usual WebPreferences struct passed to the renderer.
604 // The empty string means to fall back to the pref for the Common script
605 // ("Zyyy"). For example, if chrome.fonts.serif.Cyrl is the empty string, it
606 // means to use chrome.fonts.serif.Zyyy for Cyrillic script. Prefs that are
607 // the empty string are normally not passed to WebKit, since there are so many
608 // of them that it would cause a performance regression. Not passing the pref
609 // is normally okay since WebKit does the desired fallback behavior regardless
610 // of whether the empty string is passed or the pref is not passed at all. But
611 // if the pref has changed from non-empty to the empty string, we must let
613 std::string generic_family;
615 if (pref_names_util::ParseFontNamePrefPath(pref_name,
618 PrefService* prefs = GetProfile()->GetPrefs();
619 std::string pref_value = prefs->GetString(pref_name.c_str());
620 if (pref_value.empty()) {
621 WebPreferences web_prefs =
622 web_contents_->GetRenderViewHost()->GetWebkitPreferences();
623 OverrideFontFamily(&web_prefs, generic_family, script, std::string());
624 web_contents_->GetRenderViewHost()->UpdateWebkitPreferences(web_prefs);
630 void PrefsTabHelper::OnWebPrefChanged(const std::string& pref_name) {
631 #if !defined(OS_ANDROID)
632 OnFontFamilyPrefChanged(pref_name);
635 web_contents_->GetRenderViewHost()->OnWebkitPreferencesChanged();