content/browser/webui/web_ui_impl.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 "content/browser/webui/web_ui_impl.h"
   6
   7 #include "base/json/json_writer.h"
   8 #include "base/strings/utf_string_conversions.h"
   9 #include "base/values.h"
  10 #include "content/browser/child_process_security_policy_impl.h"
  11 #include "content/browser/renderer_host/dip_util.h"
  12 #include "content/browser/renderer_host/render_process_host_impl.h"
  13 #include "content/browser/web_contents/web_contents_impl.h"
  14 #include "content/browser/web_contents/web_contents_view.h"
  15 #include "content/browser/webui/web_ui_controller_factory_registry.h"
  16 #include "content/common/view_messages.h"
  17 #include "content/public/browser/content_browser_client.h"
  18 #include "content/public/browser/render_frame_host.h"
  19 #include "content/public/browser/render_view_host.h"
  20 #include "content/public/browser/web_ui_controller.h"
  21 #include "content/public/browser/web_ui_message_handler.h"
  22 #include "content/public/common/bindings_policy.h"
  23 #include "content/public/common/content_client.h"
  24
  25 namespace content {
  26
  27 const WebUI::TypeID WebUI::kNoWebUI = NULL;
  28
  29 // static
  30 base::string16 WebUI::GetJavascriptCall(
  31     const std::string& function_name,
  32     const std::vector<const base::Value*>& arg_list) {
  33   base::string16 parameters;
  34   std::string json;
  35   for (size_t i = 0; i < arg_list.size(); ++i) {
  36     if (i > 0)
  37       parameters += base::char16(',');
  38
  39     base::JSONWriter::Write(arg_list[i], &json);
  40     parameters += base::UTF8ToUTF16(json);
  41   }
  42   return base::ASCIIToUTF16(function_name) +
  43       base::char16('(') + parameters + base::char16(')') + base::char16(';');
  44 }
  45
  46 WebUIImpl::WebUIImpl(WebContents* contents)
  47     : link_transition_type_(PAGE_TRANSITION_LINK),
  48       bindings_(BINDINGS_POLICY_WEB_UI),
  49       web_contents_(contents) {
  50   DCHECK(contents);
  51 }
  52
  53 WebUIImpl::~WebUIImpl() {
  54   // Delete the controller first, since it may also be keeping a pointer to some
  55   // of the handlers and can call them at destruction.
  56   controller_.reset();
  57 }
  58
  59 // WebUIImpl, public: ----------------------------------------------------------
  60
  61 bool WebUIImpl::OnMessageReceived(const IPC::Message& message) {
  62   bool handled = true;
  63   IPC_BEGIN_MESSAGE_MAP(WebUIImpl, message)
  64     IPC_MESSAGE_HANDLER(ViewHostMsg_WebUISend, OnWebUISend)
  65     IPC_MESSAGE_UNHANDLED(handled = false)
  66   IPC_END_MESSAGE_MAP()
  67   return handled;
  68 }
  69
  70 void WebUIImpl::OnWebUISend(const GURL& source_url,
  71                             const std::string& message,
  72                             const base::ListValue& args) {
  73   if (!ChildProcessSecurityPolicyImpl::GetInstance()->
  74           HasWebUIBindings(web_contents_->GetRenderProcessHost()->GetID()) ||
  75       !WebUIControllerFactoryRegistry::GetInstance()->IsURLAcceptableForWebUI(
  76           web_contents_->GetBrowserContext(), source_url)) {
  77     NOTREACHED() << "Blocked unauthorized use of WebUIBindings.";
  78     return;
  79   }
  80
  81   ProcessWebUIMessage(source_url, message, args);
  82 }
  83
  84 void WebUIImpl::RenderViewCreated(RenderViewHost* render_view_host) {
  85   controller_->RenderViewCreated(render_view_host);
  86
  87   // Do not attempt to set the toolkit property if WebUI is not enabled, e.g.,
  88   // the bookmarks manager page.
  89   if (!(bindings_ & BINDINGS_POLICY_WEB_UI))
  90     return;
  91
  92 #if defined(TOOLKIT_VIEWS)
  93   render_view_host->SetWebUIProperty("toolkit", "views");
  94 #endif  // defined(TOOLKIT_VIEWS)
  95 }
  96
  97 WebContents* WebUIImpl::GetWebContents() const {
  98   return web_contents_;
  99 }
 100
 101 float WebUIImpl::GetDeviceScaleFactor() const {
 102   return GetScaleFactorForView(web_contents_->GetRenderWidgetHostView());
 103 }
 104
 105 const base::string16& WebUIImpl::GetOverriddenTitle() const {
 106   return overridden_title_;
 107 }
 108
 109 void WebUIImpl::OverrideTitle(const base::string16& title) {
 110   overridden_title_ = title;
 111 }
 112
 113 PageTransition WebUIImpl::GetLinkTransitionType() const {
 114   return link_transition_type_;
 115 }
 116
 117 void WebUIImpl::SetLinkTransitionType(PageTransition type) {
 118   link_transition_type_ = type;
 119 }
 120
 121 int WebUIImpl::GetBindings() const {
 122   return bindings_;
 123 }
 124
 125 void WebUIImpl::SetBindings(int bindings) {
 126   bindings_ = bindings;
 127 }
 128
 129 void WebUIImpl::OverrideJavaScriptFrame(const std::string& frame_name) {
 130   frame_name_ = frame_name;
 131 }
 132
 133 WebUIController* WebUIImpl::GetController() const {
 134   return controller_.get();
 135 }
 136
 137 void WebUIImpl::SetController(WebUIController* controller) {
 138   controller_.reset(controller);
 139 }
 140
 141 void WebUIImpl::CallJavascriptFunction(const std::string& function_name) {
 142   DCHECK(base::IsStringASCII(function_name));
 143   base::string16 javascript = base::ASCIIToUTF16(function_name + "();");
 144   ExecuteJavascript(javascript);
 145 }
 146
 147 void WebUIImpl::CallJavascriptFunction(const std::string& function_name,
 148                                        const base::Value& arg) {
 149   DCHECK(base::IsStringASCII(function_name));
 150   std::vector<const base::Value*> args;
 151   args.push_back(&arg);
 152   ExecuteJavascript(GetJavascriptCall(function_name, args));
 153 }
 154
 155 void WebUIImpl::CallJavascriptFunction(
 156     const std::string& function_name,
 157     const base::Value& arg1, const base::Value& arg2) {
 158   DCHECK(base::IsStringASCII(function_name));
 159   std::vector<const base::Value*> args;
 160   args.push_back(&arg1);
 161   args.push_back(&arg2);
 162   ExecuteJavascript(GetJavascriptCall(function_name, args));
 163 }
 164
 165 void WebUIImpl::CallJavascriptFunction(
 166     const std::string& function_name,
 167     const base::Value& arg1, const base::Value& arg2, const base::Value& arg3) {
 168   DCHECK(base::IsStringASCII(function_name));
 169   std::vector<const base::Value*> args;
 170   args.push_back(&arg1);
 171   args.push_back(&arg2);
 172   args.push_back(&arg3);
 173   ExecuteJavascript(GetJavascriptCall(function_name, args));
 174 }
 175
 176 void WebUIImpl::CallJavascriptFunction(
 177     const std::string& function_name,
 178     const base::Value& arg1,
 179     const base::Value& arg2,
 180     const base::Value& arg3,
 181     const base::Value& arg4) {
 182   DCHECK(base::IsStringASCII(function_name));
 183   std::vector<const base::Value*> args;
 184   args.push_back(&arg1);
 185   args.push_back(&arg2);
 186   args.push_back(&arg3);
 187   args.push_back(&arg4);
 188   ExecuteJavascript(GetJavascriptCall(function_name, args));
 189 }
 190
 191 void WebUIImpl::CallJavascriptFunction(
 192     const std::string& function_name,
 193     const std::vector<const base::Value*>& args) {
 194   DCHECK(base::IsStringASCII(function_name));
 195   ExecuteJavascript(GetJavascriptCall(function_name, args));
 196 }
 197
 198 void WebUIImpl::RegisterMessageCallback(const std::string &message,
 199                                         const MessageCallback& callback) {
 200   message_callbacks_.insert(std::make_pair(message, callback));
 201 }
 202
 203 void WebUIImpl::ProcessWebUIMessage(const GURL& source_url,
 204                                     const std::string& message,
 205                                     const base::ListValue& args) {
 206   if (controller_->OverrideHandleWebUIMessage(source_url, message, args))
 207     return;
 208
 209   // Look up the callback for this message.
 210   MessageCallbackMap::const_iterator callback =
 211       message_callbacks_.find(message);
 212   if (callback != message_callbacks_.end()) {
 213     // Forward this message and content on.
 214     callback->second.Run(&args);
 215   } else {
 216     NOTREACHED() << "Unhandled chrome.send(\"" << message << "\");";
 217   }
 218 }
 219
 220 // WebUIImpl, protected: -------------------------------------------------------
 221
 222 void WebUIImpl::AddMessageHandler(WebUIMessageHandler* handler) {
 223   DCHECK(!handler->web_ui());
 224   handler->set_web_ui(this);
 225   handler->RegisterMessages();
 226   handlers_.push_back(handler);
 227 }
 228
 229 void WebUIImpl::ExecuteJavascript(const base::string16& javascript) {
 230   RenderFrameHost* target_frame = TargetFrame();
 231   if (target_frame)
 232     target_frame->ExecuteJavaScript(javascript);
 233 }
 234
 235 RenderFrameHost* WebUIImpl::TargetFrame() {
 236   if (frame_name_.empty())
 237     return web_contents_->GetMainFrame();
 238
 239   std::set<RenderFrameHost*> frame_set;
 240   web_contents_->ForEachFrame(base::Bind(&WebUIImpl::AddToSetIfFrameNameMatches,
 241                                          base::Unretained(this),
 242                                          &frame_set));
 243
 244   // It happens that some sub-pages attempt to send JavaScript messages before
 245   // their frames are loaded.
 246   DCHECK_GE(1U, frame_set.size());
 247   if (frame_set.empty())
 248     return NULL;
 249   return *frame_set.begin();
 250 }
 251
 252 void WebUIImpl::AddToSetIfFrameNameMatches(
 253     std::set<RenderFrameHost*>* frame_set,
 254     RenderFrameHost* host) {
 255   if (host->GetFrameName() == frame_name_)
 256     frame_set->insert(host);
 257 }
 258
 259 }  // namespace content