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      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.
      4 
      5 #include "chrome/common/extensions/api/extension_action/script_badge_handler.h"
      6 
      7 #include "base/memory/scoped_ptr.h"
      8 #include "base/strings/utf_string_conversions.h"
      9 #include "base/values.h"
     10 #include "chrome/common/extensions/extension.h"
     11 #include "chrome/common/extensions/extension_constants.h"
     12 #include "chrome/common/extensions/extension_manifest_constants.h"
     13 #include "chrome/common/extensions/feature_switch.h"
     14 #include "chrome/common/extensions/manifest.h"
     15 #include "chrome/common/extensions/manifest_handlers/icons_handler.h"
     16 #include "extensions/common/install_warning.h"
     17 
     18 namespace errors = extension_manifest_errors;
     19 namespace keys = extension_manifest_keys;
     20 
     21 namespace extensions {
     22 
     23 ScriptBadgeHandler::ScriptBadgeHandler() {
     24 }
     25 
     26 ScriptBadgeHandler::~ScriptBadgeHandler() {
     27 }
     28 
     29 const std::vector<std::string> ScriptBadgeHandler::PrerequisiteKeys() const {
     30   return SingleKey(keys::kIcons);
     31 }
     32 
     33 bool ScriptBadgeHandler::Parse(Extension* extension, string16* error) {
     34   scoped_ptr<ActionInfo> action_info(new ActionInfo);
     35 
     36   // Provide a default script badge if one isn't declared in the manifest.
     37   if (!extension->manifest()->HasKey(keys::kScriptBadge)) {
     38     SetActionInfoDefaults(extension, action_info.get());
     39     ActionInfo::SetScriptBadgeInfo(extension, action_info.release());
     40     return true;
     41   }
     42 
     43   // So as to not confuse developers if they specify a script badge section
     44   // in the manifest, show a warning if the script badge declaration isn't
     45   // going to have any effect.
     46   if (!FeatureSwitch::script_badges()->IsEnabled()) {
     47     extension->AddInstallWarning(
     48         InstallWarning(InstallWarning::FORMAT_TEXT,
     49                        errors::kScriptBadgeRequiresFlag));
     50   }
     51 
     52   const base::DictionaryValue* dict = NULL;
     53   if (!extension->manifest()->GetDictionary(keys::kScriptBadge, &dict)) {
     54     *error = ASCIIToUTF16(errors::kInvalidScriptBadge);
     55     return false;
     56   }
     57 
     58   action_info = ActionInfo::Load(extension, dict, error);
     59 
     60   if (!action_info.get())
     61     return false;  // Failed to parse script badge definition.
     62 
     63   // Script badges always use their extension's title and icon so users can rely
     64   // on the visual appearance to know which extension is running.  This isn't
     65   // bulletproof since an malicious extension could use a different 16x16 icon
     66   // that matches the icon of a trusted extension, and users wouldn't be warned
     67   // during installation.
     68 
     69   if (!action_info->default_title.empty()) {
     70     extension->AddInstallWarning(
     71         InstallWarning(InstallWarning::FORMAT_TEXT,
     72                        errors::kScriptBadgeTitleIgnored));
     73   }
     74 
     75   if (!action_info->default_icon.empty()) {
     76     extension->AddInstallWarning(
     77         InstallWarning(InstallWarning::FORMAT_TEXT,
     78                        errors::kScriptBadgeIconIgnored));
     79   }
     80 
     81   SetActionInfoDefaults(extension, action_info.get());
     82   ActionInfo::SetScriptBadgeInfo(extension, action_info.release());
     83   return true;
     84 }
     85 
     86 bool ScriptBadgeHandler::AlwaysParseForType(Manifest::Type type) const {
     87   return type == Manifest::TYPE_EXTENSION;
     88 }
     89 
     90 void ScriptBadgeHandler::SetActionInfoDefaults(const Extension* extension,
     91                                                ActionInfo* info) {
     92   info->default_title = extension->name();
     93   info->default_icon.Clear();
     94   for (size_t i = 0; i < extension_misc::kNumScriptBadgeIconSizes; ++i) {
     95     std::string path = IconsInfo::GetIcons(extension).Get(
     96         extension_misc::kScriptBadgeIconSizes[i],
     97         ExtensionIconSet::MATCH_BIGGER);
     98     if (!path.empty()) {
     99       info->default_icon.Add(
    100           extension_misc::kScriptBadgeIconSizes[i], path);
    101     }
    102   }
    103 }
    104 
    105 const std::vector<std::string> ScriptBadgeHandler::Keys() const {
    106   return SingleKey(keys::kScriptBadge);
    107 }
    108 
    109 }  // namespace extensions
    110