Home | History | Annotate | Download | only in options 
      1 // Copyright (c) 2011 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.
      4 
      5 #include "chrome/browser/ui/webui/options/font_settings_handler.h"
      6 
      7 #include <string>
      8 
      9 #include "base/basictypes.h"
     10 #include "base/i18n/rtl.h"
     11 #include "base/string_number_conversions.h"
     12 #include "base/string_util.h"
     13 #include "base/values.h"
     14 #include "chrome/browser/browser_process.h"
     15 #include "chrome/browser/character_encoding.h"
     16 #include "chrome/browser/prefs/pref_service.h"
     17 #include "chrome/browser/profiles/profile.h"
     18 #include "chrome/browser/ui/webui/options/font_settings_utils.h"
     19 #include "chrome/common/pref_names.h"
     20 #include "content/common/notification_details.h"
     21 #include "content/common/notification_type.h"
     22 #include "grit/chromium_strings.h"
     23 #include "grit/generated_resources.h"
     24 #include "ui/base/l10n/l10n_util.h"
     25 
     26 FontSettingsHandler::FontSettingsHandler() {
     27   fonts_list_loader_ = new FontSettingsFontsListLoader(this);
     28 }
     29 
     30 FontSettingsHandler::~FontSettingsHandler() {
     31   if (fonts_list_loader_)
     32     fonts_list_loader_->SetObserver(NULL);
     33 }
     34 
     35 void FontSettingsHandler::GetLocalizedValues(
     36     DictionaryValue* localized_strings) {
     37   DCHECK(localized_strings);
     38 
     39   static OptionsStringResource resources[] = {
     40     { "fontSettingsStandard",
     41       IDS_FONT_LANGUAGE_SETTING_FONT_SELECTOR_STANDARD_LABEL },
     42     { "fontSettingsSerif",
     43       IDS_FONT_LANGUAGE_SETTING_FONT_SELECTOR_SERIF_LABEL },
     44     { "fontSettingsSansSerif",
     45       IDS_FONT_LANGUAGE_SETTING_FONT_SELECTOR_SANS_SERIF_LABEL },
     46     { "fontSettingsFixedWidth",
     47       IDS_FONT_LANGUAGE_SETTING_FONT_SELECTOR_FIXED_WIDTH_LABEL },
     48     { "fontSettingsMinimumSize",
     49       IDS_FONT_LANGUAGE_SETTING_MINIMUM_FONT_SIZE_TITLE },
     50     { "fontSettingsEncoding",
     51       IDS_FONT_LANGUAGE_SETTING_FONT_SUB_DIALOG_ENCODING_TITLE },
     52     { "fontSettingsSizeTiny",
     53       IDS_FONT_LANGUAGE_SETTING_FONT_SIZE_TINY },
     54     { "fontSettingsSizeHuge",
     55       IDS_FONT_LANGUAGE_SETTING_FONT_SIZE_HUGE },
     56     { "fontSettingsLoremIpsum",
     57       IDS_FONT_LANGUAGE_SETTING_LOREM_IPSUM },
     58   };
     59 
     60   RegisterStrings(localized_strings, resources, arraysize(resources));
     61   RegisterTitle(localized_strings, "fontSettingsPage",
     62                 IDS_FONT_LANGUAGE_SETTING_FONT_TAB_TITLE);
     63   localized_strings->SetString("fontSettingsPlaceholder",
     64       l10n_util::GetStringUTF16(
     65           IDS_FONT_LANGUAGE_SETTING_PLACEHOLDER));
     66 }
     67 
     68 void FontSettingsHandler::Initialize() {
     69   DCHECK(web_ui_);
     70   SetUpStandardFontSample();
     71   SetUpSerifFontSample();
     72   SetUpSansSerifFontSample();
     73   SetUpFixedFontSample();
     74   SetUpMinimumFontSample();
     75 }
     76 
     77 WebUIMessageHandler* FontSettingsHandler::Attach(WebUI* web_ui) {
     78   // Call through to superclass.
     79   WebUIMessageHandler* handler = OptionsPageUIHandler::Attach(web_ui);
     80 
     81   // Perform validation for saved fonts.
     82   DCHECK(web_ui_);
     83   PrefService* pref_service = web_ui_->GetProfile()->GetPrefs();
     84   FontSettingsUtilities::ValidateSavedFonts(pref_service);
     85 
     86   // Register for preferences that we need to observe manually.
     87   standard_font_.Init(prefs::kWebKitStandardFontFamily, pref_service, this);
     88   serif_font_.Init(prefs::kWebKitSerifFontFamily, pref_service, this);
     89   sans_serif_font_.Init(prefs::kWebKitSansSerifFontFamily, pref_service, this);
     90   fixed_font_.Init(prefs::kWebKitFixedFontFamily, pref_service, this);
     91   font_encoding_.Init(prefs::kDefaultCharset, pref_service, this);
     92   default_font_size_.Init(prefs::kWebKitDefaultFontSize, pref_service, this);
     93   default_fixed_font_size_.Init(prefs::kWebKitDefaultFixedFontSize,
     94                                 pref_service, this);
     95   minimum_font_size_.Init(prefs::kWebKitMinimumFontSize, pref_service, this);
     96 
     97   // Return result from the superclass.
     98   return handler;
     99 }
    100 
    101 void FontSettingsHandler::RegisterMessages() {
    102   web_ui_->RegisterMessageCallback("fetchFontsData",
    103       NewCallback(this, &FontSettingsHandler::HandleFetchFontsData));
    104 }
    105 
    106 void FontSettingsHandler::HandleFetchFontsData(const ListValue* args) {
    107   fonts_list_loader_->StartLoadFontsList();
    108 }
    109 
    110 void FontSettingsHandler::FontsListHasLoaded() {
    111   ListValue* fonts_list = fonts_list_loader_->GetFontsList();
    112 
    113   ListValue encoding_list;
    114   const std::vector<CharacterEncoding::EncodingInfo>* encodings;
    115   PrefService* pref_service = web_ui_->GetProfile()->GetPrefs();
    116   encodings = CharacterEncoding::GetCurrentDisplayEncodings(
    117       g_browser_process->GetApplicationLocale(),
    118       pref_service->GetString(prefs::kStaticEncodings),
    119       pref_service->GetString(prefs::kRecentlySelectedEncoding));
    120   DCHECK(encodings);
    121   DCHECK(!encodings->empty());
    122 
    123   std::vector<CharacterEncoding::EncodingInfo>::const_iterator it;
    124   for (it = encodings->begin(); it != encodings->end(); ++it) {
    125     ListValue* option = new ListValue();
    126     if (it->encoding_id) {
    127       int cmd_id = it->encoding_id;
    128       std::string encoding =
    129       CharacterEncoding::GetCanonicalEncodingNameByCommandId(cmd_id);
    130       string16 name = it->encoding_display_name;
    131       base::i18n::AdjustStringForLocaleDirection(&name);
    132       option->Append(Value::CreateStringValue(encoding));
    133       option->Append(Value::CreateStringValue(name));
    134     } else {
    135       // Add empty name/value to indicate a separator item.
    136       option->Append(Value::CreateStringValue(""));
    137       option->Append(Value::CreateStringValue(""));
    138     }
    139     encoding_list.Append(option);
    140   }
    141 
    142   ListValue selected_values;
    143   selected_values.Append(Value::CreateStringValue(standard_font_.GetValue()));
    144   selected_values.Append(Value::CreateStringValue(serif_font_.GetValue()));
    145   selected_values.Append(Value::CreateStringValue(sans_serif_font_.GetValue()));
    146   selected_values.Append(Value::CreateStringValue(fixed_font_.GetValue()));
    147   selected_values.Append(Value::CreateStringValue(font_encoding_.GetValue()));
    148 
    149   web_ui_->CallJavascriptFunction("FontSettings.setFontsData",
    150                                   *fonts_list, encoding_list, selected_values);
    151 }
    152 
    153 void FontSettingsHandler::Observe(NotificationType type,
    154                                   const NotificationSource& source,
    155                                   const NotificationDetails& details) {
    156   if (type == NotificationType::PREF_CHANGED) {
    157     std::string* pref_name = Details<std::string>(details).ptr();
    158     if (*pref_name == prefs::kWebKitStandardFontFamily) {
    159       SetUpStandardFontSample();
    160     } else if (*pref_name == prefs::kWebKitSerifFontFamily) {
    161       SetUpSerifFontSample();
    162     } else if (*pref_name == prefs::kWebKitSansSerifFontFamily) {
    163       SetUpSansSerifFontSample();
    164     } else if (*pref_name == prefs::kWebKitFixedFontFamily ||
    165                *pref_name == prefs::kWebKitDefaultFixedFontSize) {
    166       SetUpFixedFontSample();
    167     } else if (*pref_name == prefs::kWebKitDefaultFontSize) {
    168       SetUpStandardFontSample();
    169       SetUpSerifFontSample();
    170       SetUpSansSerifFontSample();
    171     } else if (*pref_name == prefs::kWebKitMinimumFontSize) {
    172       SetUpMinimumFontSample();
    173     }
    174   }
    175 }
    176 
    177 void FontSettingsHandler::SetUpStandardFontSample() {
    178   StringValue font_value(standard_font_.GetValue());
    179   FundamentalValue size_value(default_font_size_.GetValue());
    180   web_ui_->CallJavascriptFunction(
    181       "FontSettings.setUpStandardFontSample", font_value, size_value);
    182 }
    183 
    184 void FontSettingsHandler::SetUpSerifFontSample() {
    185   StringValue font_value(serif_font_.GetValue());
    186   FundamentalValue size_value(default_font_size_.GetValue());
    187   web_ui_->CallJavascriptFunction(
    188       "FontSettings.setUpSerifFontSample", font_value, size_value);
    189 }
    190 
    191 void FontSettingsHandler::SetUpSansSerifFontSample() {
    192   StringValue font_value(sans_serif_font_.GetValue());
    193   FundamentalValue size_value(default_font_size_.GetValue());
    194   web_ui_->CallJavascriptFunction(
    195       "FontSettings.setUpSansSerifFontSample", font_value, size_value);
    196 }
    197 
    198 void FontSettingsHandler::SetUpFixedFontSample() {
    199   StringValue font_value(fixed_font_.GetValue());
    200   FundamentalValue size_value(default_fixed_font_size_.GetValue());
    201   web_ui_->CallJavascriptFunction(
    202       "FontSettings.setUpFixedFontSample", font_value, size_value);
    203 }
    204 
    205 void FontSettingsHandler::SetUpMinimumFontSample() {
    206   FundamentalValue size_value(minimum_font_size_.GetValue());
    207   web_ui_->CallJavascriptFunction("FontSettings.setUpMinimumFontSample",
    208                                   size_value);
    209 }
    210