ios/web/web_state/js/crw_js_plugin_placeholder_manager.mm

   1 // Copyright 2013 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 #import "ios/web/web_state/js/crw_js_plugin_placeholder_manager.h"
   6
   7 #include "base/logging.h"
   8 #include "base/strings/sys_string_conversions.h"
   9 #include "ios/web/public/web_client.h"
  10
  11 @implementation CRWJSPluginPlaceholderManager
  12
  13 namespace {
  14
  15 // Returns a string with \ and ' escaped, and wrapped in '.
  16 // This is used instead of GetQuotedJSONString because that will convert
  17 // UTF-16 to UTF-8, which can cause problems when injecting scripts depending
  18 // on the page encoding (see crbug.com/302741).
  19 NSString* EscapedQuotedString(NSString* string) {
  20   string = [string stringByReplacingOccurrencesOfString:@"\\"
  21                                              withString:@"\\\\"];
  22   string = [string stringByReplacingOccurrencesOfString:@"'"
  23                                              withString:@"\\'"];
  24   return [NSString stringWithFormat:@"'%@'", string];
  25 }
  26
  27 }
  28
  29 #pragma mark -
  30 #pragma mark ProtectedMethods
  31
  32 - (NSString*)scriptPath {
  33   return @"plugin_placeholder";
  34 }
  35
  36 - (NSString*)presenceBeacon {
  37   return @"__gCrWeb.plugin";
  38 }
  39
  40 - (NSString*)staticInjectionContent {
  41   NSString* baseContent = [super staticInjectionContent];
  42   DCHECK(web::GetWebClient());
  43   NSString* pluginNotSupportedText = base::SysUTF16ToNSString(
  44       web::GetWebClient()->GetPluginNotSupportedText());
  45   NSString* placeholderCall = [NSString stringWithFormat:
  46       @"__gCrWeb.plugin.addPluginPlaceholders(%@);",
  47           EscapedQuotedString(pluginNotSupportedText)];
  48   return [baseContent stringByAppendingString:placeholderCall];
  49 }
  50
  51 @end