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