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/renderer/web_apps.h" 6 7 #include <string> 8 #include <vector> 9 10 #include "base/command_line.h" 11 #include "base/json/json_reader.h" 12 #include "base/strings/string16.h" 13 #include "base/strings/string_number_conversions.h" 14 #include "base/strings/string_split.h" 15 #include "base/strings/utf_string_conversions.h" 16 #include "base/values.h" 17 #include "chrome/common/chrome_switches.h" 18 #include "chrome/common/web_application_info.h" 19 #include "grit/common_resources.h" 20 #include "grit/generated_resources.h" 21 #include "third_party/WebKit/public/platform/WebString.h" 22 #include "third_party/WebKit/public/platform/WebURL.h" 23 #include "third_party/WebKit/public/web/WebDocument.h" 24 #include "third_party/WebKit/public/web/WebElement.h" 25 #include "third_party/WebKit/public/web/WebFrame.h" 26 #include "third_party/WebKit/public/web/WebNode.h" 27 #include "third_party/WebKit/public/web/WebNodeList.h" 28 #include "ui/base/l10n/l10n_util.h" 29 #include "ui/base/resource/resource_bundle.h" 30 #include "ui/gfx/size.h" 31 #include "url/gurl.h" 32 33 using blink::WebDocument; 34 using blink::WebElement; 35 using blink::WebFrame; 36 using blink::WebNode; 37 using blink::WebNodeList; 38 using blink::WebString; 39 40 namespace web_apps { 41 namespace { 42 43 // Sizes a single size (the width or height) from a 'sizes' attribute. A size 44 // matches must match the following regex: [1-9][0-9]*. 45 int ParseSingleIconSize(const base::string16& text) { 46 // Size must not start with 0, and be between 0 and 9. 47 if (text.empty() || !(text[0] >= L'1' && text[0] <= L'9')) 48 return 0; 49 50 // Make sure all chars are from 0-9. 51 for (size_t i = 1; i < text.length(); ++i) { 52 if (!(text[i] >= L'0' && text[i] <= L'9')) 53 return 0; 54 } 55 int output; 56 if (!base::StringToInt(text, &output)) 57 return 0; 58 return output; 59 } 60 61 // Parses an icon size. An icon size must match the following regex: 62 // [1-9][0-9]*x[1-9][0-9]*. 63 // If the input couldn't be parsed, a size with a width/height == 0 is returned. 64 gfx::Size ParseIconSize(const base::string16& text) { 65 std::vector<base::string16> sizes; 66 base::SplitStringDontTrim(text, L'x', &sizes); 67 if (sizes.size() != 2) 68 return gfx::Size(); 69 70 return gfx::Size(ParseSingleIconSize(sizes[0]), 71 ParseSingleIconSize(sizes[1])); 72 } 73 74 void AddInstallIcon(const WebElement& link, 75 std::vector<WebApplicationInfo::IconInfo>* icons) { 76 WebString href = link.getAttribute("href"); 77 if (href.isNull() || href.isEmpty()) 78 return; 79 80 // Get complete url. 81 GURL url = link.document().completeURL(href); 82 if (!url.is_valid()) 83 return; 84 85 WebApplicationInfo::IconInfo icon_info; 86 bool is_any = false; 87 std::vector<gfx::Size> icon_sizes; 88 if (link.hasAttribute("sizes") && 89 ParseIconSizes(link.getAttribute("sizes"), &icon_sizes, &is_any) && 90 !is_any && 91 icon_sizes.size() == 1) { 92 icon_info.width = icon_sizes[0].width(); 93 icon_info.height = icon_sizes[0].height(); 94 } 95 icon_info.url = url; 96 icons->push_back(icon_info); 97 } 98 99 } // namespace 100 101 bool ParseIconSizes(const base::string16& text, 102 std::vector<gfx::Size>* sizes, 103 bool* is_any) { 104 *is_any = false; 105 std::vector<base::string16> size_strings; 106 base::SplitStringAlongWhitespace(text, &size_strings); 107 for (size_t i = 0; i < size_strings.size(); ++i) { 108 if (EqualsASCII(size_strings[i], "any")) { 109 *is_any = true; 110 } else { 111 gfx::Size size = ParseIconSize(size_strings[i]); 112 if (size.width() <= 0 || size.height() <= 0) 113 return false; // Bogus size. 114 sizes->push_back(size); 115 } 116 } 117 if (*is_any && !sizes->empty()) { 118 // If is_any is true, it must occur by itself. 119 return false; 120 } 121 return (*is_any || !sizes->empty()); 122 } 123 124 bool ParseWebAppFromWebDocument(WebFrame* frame, 125 WebApplicationInfo* app_info, 126 base::string16* error) { 127 WebDocument document = frame->document(); 128 if (document.isNull()) 129 return true; 130 131 WebElement head = document.head(); 132 if (head.isNull()) 133 return true; 134 135 GURL document_url = document.url(); 136 WebNodeList children = head.childNodes(); 137 for (unsigned i = 0; i < children.length(); ++i) { 138 WebNode child = children.item(i); 139 if (!child.isElementNode()) 140 continue; 141 WebElement elem = child.to<WebElement>(); 142 143 if (elem.hasTagName("link")) { 144 std::string rel = elem.getAttribute("rel").utf8(); 145 // "rel" attribute may use either "icon" or "shortcut icon". 146 // see also 147 // <http://en.wikipedia.org/wiki/Favicon> 148 // <http://dev.w3.org/html5/spec/Overview.html#rel-icon> 149 // 150 // Streamlined Hosted Apps also support "apple-touch-icon" and 151 // "apple-touch-icon-precomposed". 152 if (LowerCaseEqualsASCII(rel, "icon") || 153 LowerCaseEqualsASCII(rel, "shortcut icon") || 154 (CommandLine::ForCurrentProcess()-> 155 HasSwitch(switches::kEnableStreamlinedHostedApps) && 156 (LowerCaseEqualsASCII(rel, "apple-touch-icon") || 157 LowerCaseEqualsASCII(rel, "apple-touch-icon-precomposed")))) { 158 AddInstallIcon(elem, &app_info->icons); 159 } 160 } else if (elem.hasTagName("meta") && elem.hasAttribute("name")) { 161 std::string name = elem.getAttribute("name").utf8(); 162 WebString content = elem.getAttribute("content"); 163 if (name == "application-name") { 164 app_info->title = content; 165 } else if (name == "description") { 166 app_info->description = content; 167 } else if (name == "application-url") { 168 std::string url = content.utf8(); 169 app_info->app_url = document_url.is_valid() ? 170 document_url.Resolve(url) : GURL(url); 171 if (!app_info->app_url.is_valid()) 172 app_info->app_url = GURL(); 173 } 174 } 175 } 176 177 return true; 178 } 179 180 } // namespace web_apps 181
