chrome/renderer/web_apps.cc

   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/string_util.h"
  16 #include "base/strings/utf_string_conversions.h"
  17 #include "base/values.h"
  18 #include "chrome/common/chrome_switches.h"
  19 #include "chrome/common/web_application_info.h"
  20 #include "third_party/WebKit/public/platform/WebString.h"
  21 #include "third_party/WebKit/public/platform/WebURL.h"
  22 #include "third_party/WebKit/public/web/WebDocument.h"
  23 #include "third_party/WebKit/public/web/WebElement.h"
  24 #include "third_party/WebKit/public/web/WebFrame.h"
  25 #include "third_party/WebKit/public/web/WebNode.h"
  26 #include "third_party/WebKit/public/web/WebNodeList.h"
  27 #include "ui/gfx/geometry/size.h"
  28 #include "url/gurl.h"
  29
  30 using blink::WebDocument;
  31 using blink::WebElement;
  32 using blink::WebFrame;
  33 using blink::WebNode;
  34 using blink::WebNodeList;
  35 using blink::WebString;
  36
  37 namespace web_apps {
  38 namespace {
  39
  40 // Sizes a single size (the width or height) from a 'sizes' attribute. A size
  41 // matches must match the following regex: [1-9][0-9]*.
  42 int ParseSingleIconSize(const base::StringPiece16& text) {
  43   // Size must not start with 0, and be between 0 and 9.
  44   if (text.empty() || !(text[0] >= L'1' && text[0] <= L'9'))
  45     return 0;
  46
  47   // Make sure all chars are from 0-9.
  48   for (size_t i = 1; i < text.length(); ++i) {
  49     if (!(text[i] >= L'0' && text[i] <= L'9'))
  50       return 0;
  51   }
  52   int output;
  53   if (!base::StringToInt(text, &output))
  54     return 0;
  55   return output;
  56 }
  57
  58 // Parses an icon size. An icon size must match the following regex:
  59 // [1-9][0-9]*x[1-9][0-9]*.
  60 // If the input couldn't be parsed, a size with a width/height == 0 is returned.
  61 gfx::Size ParseIconSize(const base::string16& text) {
  62   std::vector<base::StringPiece16> sizes = base::SplitStringPiece(
  63       text, base::string16(1, 'x'),
  64       base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
  65   if (sizes.size() != 2)
  66     return gfx::Size();
  67
  68   return gfx::Size(ParseSingleIconSize(sizes[0]),
  69                    ParseSingleIconSize(sizes[1]));
  70 }
  71
  72 void AddInstallIcon(const WebElement& link,
  73                     std::vector<WebApplicationInfo::IconInfo>* icons) {
  74   WebString href = link.getAttribute("href");
  75   if (href.isNull() || href.isEmpty())
  76     return;
  77
  78   // Get complete url.
  79   GURL url = link.document().completeURL(href);
  80   if (!url.is_valid())
  81     return;
  82
  83   WebApplicationInfo::IconInfo icon_info;
  84   bool is_any = false;
  85   std::vector<gfx::Size> icon_sizes;
  86   if (link.hasAttribute("sizes") &&
  87       ParseIconSizes(link.getAttribute("sizes"), &icon_sizes, &is_any) &&
  88       !is_any &&
  89       icon_sizes.size() == 1) {
  90     icon_info.width = icon_sizes[0].width();
  91     icon_info.height = icon_sizes[0].height();
  92   }
  93   icon_info.url = url;
  94   icons->push_back(icon_info);
  95 }
  96
  97 }  // namespace
  98
  99 bool ParseIconSizes(const base::string16& text,
 100                     std::vector<gfx::Size>* sizes,
 101                     bool* is_any) {
 102   *is_any = false;
 103   std::vector<base::string16> size_strings = base::SplitString(
 104       text, base::kWhitespaceASCIIAs16,
 105       base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
 106   for (size_t i = 0; i < size_strings.size(); ++i) {
 107     if (base::EqualsASCII(size_strings[i], "any")) {
 108       *is_any = true;
 109     } else {
 110       gfx::Size size = ParseIconSize(size_strings[i]);
 111       if (size.width() <= 0 || size.height() <= 0)
 112         return false;  // Bogus size.
 113       sizes->push_back(size);
 114     }
 115   }
 116   if (*is_any && !sizes->empty()) {
 117     // If is_any is true, it must occur by itself.
 118     return false;
 119   }
 120   return (*is_any || !sizes->empty());
 121 }
 122
 123 void ParseWebAppFromWebDocument(WebFrame* frame,
 124                                 WebApplicationInfo* app_info) {
 125   WebDocument document = frame->document();
 126   if (document.isNull())
 127     return;
 128
 129   WebElement head = document.head();
 130   if (head.isNull())
 131     return;
 132
 133   GURL document_url = document.url();
 134   WebNodeList children = head.childNodes();
 135   for (unsigned i = 0; i < children.length(); ++i) {
 136     WebNode child = children.item(i);
 137     if (!child.isElementNode())
 138       continue;
 139     WebElement elem = child.to<WebElement>();
 140
 141     if (elem.hasHTMLTagName("link")) {
 142       std::string rel = elem.getAttribute("rel").utf8();
 143       // "rel" attribute may use either "icon" or "shortcut icon".
 144       // see also
 145       //   <http://en.wikipedia.org/wiki/Favicon>
 146       //   <http://dev.w3.org/html5/spec/Overview.html#rel-icon>
 147       //
 148       // Bookmark apps also support "apple-touch-icon" and
 149       // "apple-touch-icon-precomposed".
 150 #if defined(OS_MACOSX)
 151       bool bookmark_apps_enabled = base::CommandLine::ForCurrentProcess()->
 152           HasSwitch(switches::kEnableNewBookmarkApps);
 153 #else
 154       bool bookmark_apps_enabled = !base::CommandLine::ForCurrentProcess()->
 155           HasSwitch(switches::kDisableNewBookmarkApps);
 156 #endif
 157       if (base::LowerCaseEqualsASCII(rel, "icon") ||
 158           base::LowerCaseEqualsASCII(rel, "shortcut icon") ||
 159           (bookmark_apps_enabled &&
 160            (base::LowerCaseEqualsASCII(rel, "apple-touch-icon") ||
 161             base::LowerCaseEqualsASCII(rel, "apple-touch-icon-precomposed")))) {
 162         AddInstallIcon(elem, &app_info->icons);
 163       }
 164     } else if (elem.hasHTMLTagName("meta") && elem.hasAttribute("name")) {
 165       std::string name = elem.getAttribute("name").utf8();
 166       WebString content = elem.getAttribute("content");
 167       if (name == "application-name") {
 168         app_info->title = content;
 169       } else if (name == "description") {
 170         app_info->description = content;
 171       } else if (name == "application-url") {
 172         std::string url = content.utf8();
 173         app_info->app_url = document_url.is_valid() ?
 174             document_url.Resolve(url) : GURL(url);
 175         if (!app_info->app_url.is_valid())
 176           app_info->app_url = GURL();
 177       } else if (name == "mobile-web-app-capable" &&
 178                  base::LowerCaseEqualsASCII(base::StringPiece16(content),
 179                                             "yes")) {
 180         app_info->mobile_capable = WebApplicationInfo::MOBILE_CAPABLE;
 181       } else if (name == "apple-mobile-web-app-capable" &&
 182                  base::LowerCaseEqualsASCII(
 183                      base::StringPiece16(content), "yes") &&
 184                  app_info->mobile_capable ==
 185                      WebApplicationInfo::MOBILE_CAPABLE_UNSPECIFIED) {
 186         app_info->mobile_capable = WebApplicationInfo::MOBILE_CAPABLE_APPLE;
 187       }
 188     }
 189   }
 190 }
 191
 192 }  // namespace web_apps