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/browser/autocomplete/history_provider.h" 6 7 #include <string> 8 9 #include "base/strings/string_util.h" 10 #include "base/strings/utf_string_conversions.h" 11 #include "chrome/browser/autocomplete/autocomplete_input.h" 12 #include "chrome/browser/autocomplete/autocomplete_match.h" 13 #include "chrome/browser/autocomplete/autocomplete_provider_listener.h" 14 #include "chrome/browser/history/history_service.h" 15 #include "chrome/browser/history/history_service_factory.h" 16 #include "chrome/browser/profiles/profile.h" 17 #include "chrome/common/net/url_fixer_upper.h" 18 #include "chrome/common/url_constants.h" 19 #include "url/url_util.h" 20 21 HistoryProvider::HistoryProvider(AutocompleteProviderListener* listener, 22 Profile* profile, 23 AutocompleteProvider::Type type) 24 : AutocompleteProvider(listener, profile, type) { 25 } 26 27 void HistoryProvider::DeleteMatch(const AutocompleteMatch& match) { 28 DCHECK(done_); 29 DCHECK(profile_); 30 DCHECK(match.deletable); 31 32 HistoryService* const history_service = 33 HistoryServiceFactory::GetForProfile(profile_, Profile::EXPLICIT_ACCESS); 34 35 // Delete the match from the history DB. 36 DCHECK(history_service); 37 DCHECK(match.destination_url.is_valid()); 38 history_service->DeleteURL(match.destination_url); 39 DeleteMatchFromMatches(match); 40 } 41 42 HistoryProvider::~HistoryProvider() {} 43 44 void HistoryProvider::DeleteMatchFromMatches(const AutocompleteMatch& match) { 45 bool found = false; 46 for (ACMatches::iterator i(matches_.begin()); i != matches_.end(); ++i) { 47 if (i->destination_url == match.destination_url && i->type == match.type) { 48 found = true; 49 if (i->is_history_what_you_typed_match || i->starred) { 50 // We can't get rid of What-You-Typed or Bookmarked matches, 51 // but we can make them look like they have no backing data. 52 i->deletable = false; 53 i->description.clear(); 54 i->description_class.clear(); 55 } else { 56 matches_.erase(i); 57 } 58 break; 59 } 60 } 61 DCHECK(found) << "Asked to delete a URL that isn't in our set of matches"; 62 listener_->OnProviderUpdate(true); 63 } 64 65 // static 66 bool HistoryProvider::FixupUserInput(AutocompleteInput* input) { 67 const string16& input_text = input->text(); 68 // Fixup and canonicalize user input. 69 const GURL canonical_gurl(URLFixerUpper::FixupURL(UTF16ToUTF8(input_text), 70 std::string())); 71 std::string canonical_gurl_str(canonical_gurl.possibly_invalid_spec()); 72 if (canonical_gurl_str.empty()) { 73 // This probably won't happen, but there are no guarantees. 74 return false; 75 } 76 77 // If the user types a number, GURL will convert it to a dotted quad. 78 // However, if the parser did not mark this as a URL, then the user probably 79 // didn't intend this interpretation. Since this can break history matching 80 // for hostname beginning with numbers (e.g. input of "17173" will be matched 81 // against "0.0.67.21" instead of the original "17173", failing to find 82 // "17173.com"), swap the original hostname in for the fixed-up one. 83 if ((input->type() != AutocompleteInput::URL) && 84 canonical_gurl.HostIsIPAddress()) { 85 std::string original_hostname = 86 UTF16ToUTF8(input_text.substr(input->parts().host.begin, 87 input->parts().host.len)); 88 const url_parse::Parsed& parts = 89 canonical_gurl.parsed_for_possibly_invalid_spec(); 90 // parts.host must not be empty when HostIsIPAddress() is true. 91 DCHECK(parts.host.is_nonempty()); 92 canonical_gurl_str.replace(parts.host.begin, parts.host.len, 93 original_hostname); 94 } 95 string16 output = UTF8ToUTF16(canonical_gurl_str); 96 // Don't prepend a scheme when the user didn't have one. Since the fixer 97 // upper only prepends the "http" scheme, that's all we need to check for. 98 if (canonical_gurl.SchemeIs(chrome::kHttpScheme) && 99 !url_util::FindAndCompareScheme(UTF16ToUTF8(input_text), 100 chrome::kHttpScheme, NULL)) 101 TrimHttpPrefix(&output); 102 103 // Make the number of trailing slashes on the output exactly match the input. 104 // Examples of why not doing this would matter: 105 // * The user types "a" and has this fixed up to "a/". Now no other sites 106 // beginning with "a" will match. 107 // * The user types "file:" and has this fixed up to "file://". Now inline 108 // autocomplete will append too few slashes, resulting in e.g. "file:/b..." 109 // instead of "file:///b..." 110 // * The user types "http:/" and has this fixed up to "http:". Now inline 111 // autocomplete will append too many slashes, resulting in e.g. 112 // "http:///c..." instead of "http://c...". 113 // NOTE: We do this after calling TrimHttpPrefix() since that can strip 114 // trailing slashes (if the scheme is the only thing in the input). It's not 115 // clear that the result of fixup really matters in this case, but there's no 116 // harm in making sure. 117 const size_t last_input_nonslash = 118 input_text.find_last_not_of(ASCIIToUTF16("/\\")); 119 const size_t num_input_slashes = (last_input_nonslash == string16::npos) ? 120 input_text.length() : (input_text.length() - 1 - last_input_nonslash); 121 const size_t last_output_nonslash = 122 output.find_last_not_of(ASCIIToUTF16("/\\")); 123 const size_t num_output_slashes = 124 (last_output_nonslash == string16::npos) ? 125 output.length() : (output.length() - 1 - last_output_nonslash); 126 if (num_output_slashes < num_input_slashes) 127 output.append(num_input_slashes - num_output_slashes, '/'); 128 else if (num_output_slashes > num_input_slashes) 129 output.erase(output.length() - num_output_slashes + num_input_slashes); 130 131 url_parse::Parsed parts; 132 URLFixerUpper::SegmentURL(output, &parts); 133 input->UpdateText(output, string16::npos, parts); 134 return !output.empty(); 135 } 136 137 // static 138 size_t HistoryProvider::TrimHttpPrefix(string16* url) { 139 // Find any "http:". 140 if (!HasHTTPScheme(*url)) 141 return 0; 142 size_t scheme_pos = 143 url->find(ASCIIToUTF16(chrome::kHttpScheme) + char16(':')); 144 DCHECK_NE(string16::npos, scheme_pos); 145 146 // Erase scheme plus up to two slashes. 147 size_t prefix_end = scheme_pos + strlen(chrome::kHttpScheme) + 1; 148 const size_t after_slashes = std::min(url->length(), prefix_end + 2); 149 while ((prefix_end < after_slashes) && ((*url)[prefix_end] == '/')) 150 ++prefix_end; 151 url->erase(scheme_pos, prefix_end - scheme_pos); 152 return (scheme_pos == 0) ? prefix_end : 0; 153 } 154 155 // static 156 bool HistoryProvider::PreventInlineAutocomplete( 157 const AutocompleteInput& input) { 158 return input.prevent_inline_autocomplete() || 159 (!input.text().empty() && 160 IsWhitespace(input.text()[input.text().length() - 1])); 161 } 162
