content/renderer/browser_plugin/browser_plugin_bindings.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/renderer/browser_plugin/browser_plugin_bindings.h"
   6
   7 #include <cstdlib>
   8 #include <string>
   9
  10 #include "base/bind.h"
  11 #include "base/message_loop/message_loop.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 "content/common/browser_plugin/browser_plugin_constants.h"
  17 #include "content/public/renderer/v8_value_converter.h"
  18 #include "content/renderer/browser_plugin/browser_plugin.h"
  19 #include "third_party/WebKit/public/platform/WebString.h"
  20 #include "third_party/WebKit/public/web/WebBindings.h"
  21 #include "third_party/WebKit/public/web/WebDOMMessageEvent.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/WebPluginContainer.h"
  27 #include "third_party/WebKit/public/web/WebView.h"
  28 #include "third_party/npapi/bindings/npapi.h"
  29 #include "v8/include/v8.h"
  30
  31 using blink::WebBindings;
  32 using blink::WebElement;
  33 using blink::WebDOMEvent;
  34 using blink::WebDOMMessageEvent;
  35 using blink::WebPluginContainer;
  36 using blink::WebString;
  37
  38 namespace content {
  39
  40 namespace {
  41
  42 BrowserPluginBindings* GetBindings(NPObject* object) {
  43   return static_cast<BrowserPluginBindings::BrowserPluginNPObject*>(object)->
  44       message_channel.get();
  45 }
  46
  47 std::string StringFromNPVariant(const NPVariant& variant) {
  48   if (!NPVARIANT_IS_STRING(variant))
  49     return std::string();
  50   const NPString& np_string = NPVARIANT_TO_STRING(variant);
  51   return std::string(np_string.UTF8Characters, np_string.UTF8Length);
  52 }
  53
  54 bool StringToNPVariant(const std::string &in, NPVariant *variant) {
  55   size_t length = in.size();
  56   NPUTF8 *chars = static_cast<NPUTF8 *>(malloc(length));
  57   if (!chars) {
  58     VOID_TO_NPVARIANT(*variant);
  59     return false;
  60   }
  61   memcpy(chars, in.c_str(), length);
  62   STRINGN_TO_NPVARIANT(chars, length, *variant);
  63   return true;
  64 }
  65
  66 // Depending on where the attribute comes from it could be a string, int32,
  67 // or a double. Javascript tends to produce an int32 or a string, but setting
  68 // the value from the developer tools console may also produce a double.
  69 int IntFromNPVariant(const NPVariant& variant) {
  70   int value = 0;
  71   switch (variant.type) {
  72     case NPVariantType_Double:
  73       value = NPVARIANT_TO_DOUBLE(variant);
  74       break;
  75     case NPVariantType_Int32:
  76       value = NPVARIANT_TO_INT32(variant);
  77       break;
  78     case NPVariantType_String:
  79       base::StringToInt(StringFromNPVariant(variant), &value);
  80       break;
  81     default:
  82       break;
  83   }
  84   return value;
  85 }
  86
  87 //------------------------------------------------------------------------------
  88 // Implementations of NPClass functions.  These are here to:
  89 // - Implement src attribute.
  90 //------------------------------------------------------------------------------
  91 NPObject* BrowserPluginBindingsAllocate(NPP npp, NPClass* the_class) {
  92   return new BrowserPluginBindings::BrowserPluginNPObject;
  93 }
  94
  95 void BrowserPluginBindingsDeallocate(NPObject* object) {
  96   BrowserPluginBindings::BrowserPluginNPObject* instance =
  97       static_cast<BrowserPluginBindings::BrowserPluginNPObject*>(object);
  98   delete instance;
  99 }
 100
 101 bool BrowserPluginBindingsHasMethod(NPObject* np_obj, NPIdentifier name) {
 102   if (!np_obj)
 103     return false;
 104
 105   BrowserPluginBindings* bindings = GetBindings(np_obj);
 106   if (!bindings)
 107     return false;
 108
 109   return bindings->HasMethod(name);
 110 }
 111
 112 bool BrowserPluginBindingsInvoke(NPObject* np_obj, NPIdentifier name,
 113                                  const NPVariant* args, uint32 arg_count,
 114                                  NPVariant* result) {
 115   if (!np_obj)
 116     return false;
 117
 118   BrowserPluginBindings* bindings = GetBindings(np_obj);
 119   if (!bindings)
 120     return false;
 121
 122   return bindings->InvokeMethod(name, args, arg_count, result);
 123 }
 124
 125 bool BrowserPluginBindingsInvokeDefault(NPObject* np_obj,
 126                                         const NPVariant* args,
 127                                         uint32 arg_count,
 128                                         NPVariant* result) {
 129   NOTIMPLEMENTED();
 130   return false;
 131 }
 132
 133 bool BrowserPluginBindingsHasProperty(NPObject* np_obj, NPIdentifier name) {
 134   if (!np_obj)
 135     return false;
 136
 137   BrowserPluginBindings* bindings = GetBindings(np_obj);
 138   if (!bindings)
 139     return false;
 140
 141   return bindings->HasProperty(name);
 142 }
 143
 144 bool BrowserPluginBindingsGetProperty(NPObject* np_obj, NPIdentifier name,
 145                                       NPVariant* result) {
 146   if (!np_obj)
 147     return false;
 148
 149   if (!result)
 150     return false;
 151
 152   // All attributes from here on rely on the bindings, so retrieve it once and
 153   // return on failure.
 154   BrowserPluginBindings* bindings = GetBindings(np_obj);
 155   if (!bindings)
 156     return false;
 157
 158   return bindings->GetProperty(name, result);
 159 }
 160
 161 bool BrowserPluginBindingsSetProperty(NPObject* np_obj, NPIdentifier name,
 162                                       const NPVariant* variant) {
 163   if (!np_obj)
 164     return false;
 165   if (!variant)
 166     return false;
 167
 168   // All attributes from here on rely on the bindings, so retrieve it once and
 169   // return on failure.
 170   BrowserPluginBindings* bindings = GetBindings(np_obj);
 171   if (!bindings)
 172     return false;
 173
 174   if (variant->type == NPVariantType_Null)
 175     return bindings->RemoveProperty(np_obj, name);
 176
 177   return bindings->SetProperty(np_obj, name, variant);
 178 }
 179
 180 bool BrowserPluginBindingsEnumerate(NPObject *np_obj, NPIdentifier **value,
 181                                     uint32_t *count) {
 182   NOTIMPLEMENTED();
 183   return true;
 184 }
 185
 186 NPClass browser_plugin_message_class = {
 187   NP_CLASS_STRUCT_VERSION,
 188   &BrowserPluginBindingsAllocate,
 189   &BrowserPluginBindingsDeallocate,
 190   NULL,
 191   &BrowserPluginBindingsHasMethod,
 192   &BrowserPluginBindingsInvoke,
 193   &BrowserPluginBindingsInvokeDefault,
 194   &BrowserPluginBindingsHasProperty,
 195   &BrowserPluginBindingsGetProperty,
 196   &BrowserPluginBindingsSetProperty,
 197   NULL,
 198   &BrowserPluginBindingsEnumerate,
 199 };
 200
 201 }  // namespace
 202
 203 // BrowserPluginMethodBinding --------------------------------------------------
 204
 205 class BrowserPluginMethodBinding {
 206  public:
 207   BrowserPluginMethodBinding(const char name[], uint32 arg_count)
 208       : name_(name),
 209         arg_count_(arg_count) {
 210   }
 211
 212   virtual ~BrowserPluginMethodBinding() {}
 213
 214   bool MatchesName(NPIdentifier name) const {
 215     return WebBindings::getStringIdentifier(name_.c_str()) == name;
 216   }
 217
 218   uint32 arg_count() const { return arg_count_; }
 219
 220   virtual bool Invoke(BrowserPluginBindings* bindings,
 221                       const NPVariant* args,
 222                       NPVariant* result) = 0;
 223
 224  private:
 225   std::string name_;
 226   uint32 arg_count_;
 227
 228   DISALLOW_COPY_AND_ASSIGN(BrowserPluginMethodBinding);
 229 };
 230
 231 class BrowserPluginBindingAttach: public BrowserPluginMethodBinding {
 232  public:
 233   BrowserPluginBindingAttach()
 234       : BrowserPluginMethodBinding(browser_plugin::kMethodInternalAttach, 2) {}
 235
 236   virtual bool Invoke(BrowserPluginBindings* bindings,
 237                       const NPVariant* args,
 238                       NPVariant* result) OVERRIDE {
 239     if (!bindings->instance()->render_view())
 240       return false;
 241
 242     int instance_id = IntFromNPVariant(args[0]);
 243     if (!instance_id)
 244       return false;
 245
 246     scoped_ptr<V8ValueConverter> converter(V8ValueConverter::create());
 247     v8::Handle<v8::Value> obj(blink::WebBindings::toV8Value(&args[1]));
 248     scoped_ptr<base::Value> value(
 249         converter->FromV8Value(obj, bindings->instance()->render_view()->
 250             GetWebView()->mainFrame()->mainWorldScriptContext()));
 251     if (!value)
 252       return false;
 253
 254     if (!value->IsType(base::Value::TYPE_DICTIONARY))
 255       return false;
 256
 257     scoped_ptr<base::DictionaryValue> extra_params(
 258         static_cast<base::DictionaryValue*>(value.release()));
 259     bindings->instance()->Attach(instance_id, extra_params.Pass());
 260     return true;
 261   }
 262
 263  private:
 264   DISALLOW_COPY_AND_ASSIGN(BrowserPluginBindingAttach);
 265 };
 266
 267 // BrowserPluginPropertyBinding ------------------------------------------------
 268
 269 class BrowserPluginPropertyBinding {
 270  public:
 271   explicit BrowserPluginPropertyBinding(const char name[]) : name_(name) {}
 272   virtual ~BrowserPluginPropertyBinding() {}
 273   const std::string& name() const { return name_; }
 274   bool MatchesName(NPIdentifier name) const {
 275     return WebBindings::getStringIdentifier(name_.c_str()) == name;
 276   }
 277   virtual bool GetProperty(BrowserPluginBindings* bindings,
 278                            NPVariant* result) = 0;
 279   virtual bool SetProperty(BrowserPluginBindings* bindings,
 280                            NPObject* np_obj,
 281                            const NPVariant* variant) = 0;
 282   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 283                               NPObject* np_obj) = 0;
 284   // Updates the DOM Attribute value with the current property value.
 285   void UpdateDOMAttribute(BrowserPluginBindings* bindings,
 286                           std::string new_value) {
 287     bindings->instance()->UpdateDOMAttribute(name(), new_value);
 288   }
 289  private:
 290   std::string name_;
 291
 292   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBinding);
 293 };
 294
 295 class BrowserPluginPropertyBindingAllowTransparency
 296     : public BrowserPluginPropertyBinding {
 297  public:
 298   BrowserPluginPropertyBindingAllowTransparency()
 299       : BrowserPluginPropertyBinding(
 300           browser_plugin::kAttributeAllowTransparency) {
 301   }
 302   virtual bool GetProperty(BrowserPluginBindings* bindings,
 303                            NPVariant* result) OVERRIDE {
 304     bool allow_transparency =
 305         bindings->instance()->GetAllowTransparencyAttribute();
 306     BOOLEAN_TO_NPVARIANT(allow_transparency, *result);
 307     return true;
 308   }
 309   virtual bool SetProperty(BrowserPluginBindings* bindings,
 310                            NPObject* np_obj,
 311                            const NPVariant* variant) OVERRIDE {
 312     std::string value = StringFromNPVariant(*variant);
 313     if (!bindings->instance()->HasDOMAttribute(name())) {
 314       UpdateDOMAttribute(bindings, value);
 315       bindings->instance()->ParseAllowTransparencyAttribute();
 316     } else {
 317       UpdateDOMAttribute(bindings, value);
 318     }
 319     return true;
 320   }
 321   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 322                               NPObject* np_obj) OVERRIDE {
 323     bindings->instance()->RemoveDOMAttribute(name());
 324     bindings->instance()->ParseAllowTransparencyAttribute();
 325   }
 326  private:
 327   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBindingAllowTransparency);
 328 };
 329
 330 class BrowserPluginPropertyBindingAutoSize
 331     : public BrowserPluginPropertyBinding {
 332  public:
 333   BrowserPluginPropertyBindingAutoSize()
 334       : BrowserPluginPropertyBinding(browser_plugin::kAttributeAutoSize) {
 335   }
 336   virtual bool GetProperty(BrowserPluginBindings* bindings,
 337                            NPVariant* result) OVERRIDE {
 338     bool auto_size = bindings->instance()->GetAutoSizeAttribute();
 339     BOOLEAN_TO_NPVARIANT(auto_size, *result);
 340     return true;
 341   }
 342   virtual bool SetProperty(BrowserPluginBindings* bindings,
 343                            NPObject* np_obj,
 344                            const NPVariant* variant) OVERRIDE {
 345     std::string value = StringFromNPVariant(*variant);
 346     if (!bindings->instance()->HasDOMAttribute(name())) {
 347       UpdateDOMAttribute(bindings, value);
 348       bindings->instance()->ParseAutoSizeAttribute();
 349     } else {
 350       UpdateDOMAttribute(bindings, value);
 351     }
 352     return true;
 353   }
 354   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 355                               NPObject* np_obj) OVERRIDE {
 356     bindings->instance()->RemoveDOMAttribute(name());
 357     bindings->instance()->ParseAutoSizeAttribute();
 358   }
 359  private:
 360   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBindingAutoSize);
 361 };
 362
 363 class BrowserPluginPropertyBindingContentWindow
 364     : public BrowserPluginPropertyBinding {
 365  public:
 366   BrowserPluginPropertyBindingContentWindow()
 367       : BrowserPluginPropertyBinding(browser_plugin::kAttributeContentWindow) {
 368   }
 369   virtual bool GetProperty(BrowserPluginBindings* bindings,
 370                            NPVariant* result) OVERRIDE {
 371     NPObject* obj = bindings->instance()->GetContentWindow();
 372     if (obj) {
 373       result->type = NPVariantType_Object;
 374       result->value.objectValue = WebBindings::retainObject(obj);
 375     }
 376     return true;
 377   }
 378   virtual bool SetProperty(BrowserPluginBindings* bindings,
 379                            NPObject* np_obj,
 380                            const NPVariant* variant) OVERRIDE {
 381     return false;
 382   }
 383   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 384                               NPObject* np_obj) OVERRIDE {}
 385  private:
 386   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBindingContentWindow);
 387 };
 388
 389 class BrowserPluginPropertyBindingMaxHeight
 390     : public BrowserPluginPropertyBinding {
 391  public:
 392   BrowserPluginPropertyBindingMaxHeight()
 393       : BrowserPluginPropertyBinding(browser_plugin::kAttributeMaxHeight) {
 394   }
 395   virtual bool GetProperty(BrowserPluginBindings* bindings,
 396                            NPVariant* result) OVERRIDE {
 397     int max_height = bindings->instance()->GetMaxHeightAttribute();
 398     INT32_TO_NPVARIANT(max_height, *result);
 399     return true;
 400   }
 401   virtual bool SetProperty(BrowserPluginBindings* bindings,
 402                            NPObject* np_obj,
 403                            const NPVariant* variant) OVERRIDE {
 404     int new_value = IntFromNPVariant(*variant);
 405     if (bindings->instance()->GetMaxHeightAttribute() != new_value) {
 406       UpdateDOMAttribute(bindings, base::IntToString(new_value));
 407       bindings->instance()->ParseSizeContraintsChanged();
 408     }
 409     return true;
 410   }
 411   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 412                               NPObject* np_obj) OVERRIDE {
 413     bindings->instance()->RemoveDOMAttribute(name());
 414     bindings->instance()->ParseSizeContraintsChanged();
 415   }
 416  private:
 417   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBindingMaxHeight);
 418 };
 419
 420 class BrowserPluginPropertyBindingMaxWidth
 421     : public BrowserPluginPropertyBinding {
 422  public:
 423   BrowserPluginPropertyBindingMaxWidth()
 424       : BrowserPluginPropertyBinding(browser_plugin::kAttributeMaxWidth) {
 425   }
 426   virtual bool GetProperty(BrowserPluginBindings* bindings,
 427                            NPVariant* result) OVERRIDE {
 428     int max_width = bindings->instance()->GetMaxWidthAttribute();
 429     INT32_TO_NPVARIANT(max_width, *result);
 430     return true;
 431   }
 432   virtual bool SetProperty(BrowserPluginBindings* bindings,
 433                            NPObject* np_obj,
 434                            const NPVariant* variant) OVERRIDE {
 435     int new_value = IntFromNPVariant(*variant);
 436     if (bindings->instance()->GetMaxWidthAttribute() != new_value) {
 437       UpdateDOMAttribute(bindings, base::IntToString(new_value));
 438       bindings->instance()->ParseSizeContraintsChanged();
 439     }
 440     return true;
 441   }
 442   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 443                               NPObject* np_obj) OVERRIDE {
 444     bindings->instance()->RemoveDOMAttribute(name());
 445     bindings->instance()->ParseSizeContraintsChanged();
 446   }
 447  private:
 448   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBindingMaxWidth);
 449 };
 450
 451 class BrowserPluginPropertyBindingMinHeight
 452     : public BrowserPluginPropertyBinding {
 453  public:
 454   BrowserPluginPropertyBindingMinHeight()
 455       : BrowserPluginPropertyBinding(browser_plugin::kAttributeMinHeight) {
 456   }
 457   virtual bool GetProperty(BrowserPluginBindings* bindings,
 458                            NPVariant* result) OVERRIDE {
 459     int min_height = bindings->instance()->GetMinHeightAttribute();
 460     INT32_TO_NPVARIANT(min_height, *result);
 461     return true;
 462   }
 463   virtual bool SetProperty(BrowserPluginBindings* bindings,
 464                            NPObject* np_obj,
 465                            const NPVariant* variant) OVERRIDE {
 466     int new_value = IntFromNPVariant(*variant);
 467     if (bindings->instance()->GetMinHeightAttribute() != new_value) {
 468       UpdateDOMAttribute(bindings, base::IntToString(new_value));
 469       bindings->instance()->ParseSizeContraintsChanged();
 470     }
 471     return true;
 472   }
 473   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 474                               NPObject* np_obj) OVERRIDE {
 475     bindings->instance()->RemoveDOMAttribute(name());
 476     bindings->instance()->ParseSizeContraintsChanged();
 477   }
 478  private:
 479   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBindingMinHeight);
 480 };
 481
 482 class BrowserPluginPropertyBindingMinWidth
 483     : public BrowserPluginPropertyBinding {
 484  public:
 485   BrowserPluginPropertyBindingMinWidth()
 486       : BrowserPluginPropertyBinding(browser_plugin::kAttributeMinWidth) {
 487   }
 488   virtual bool GetProperty(BrowserPluginBindings* bindings,
 489                            NPVariant* result) OVERRIDE {
 490     int min_width = bindings->instance()->GetMinWidthAttribute();
 491     INT32_TO_NPVARIANT(min_width, *result);
 492     return true;
 493   }
 494   virtual bool SetProperty(BrowserPluginBindings* bindings,
 495                            NPObject* np_obj,
 496                            const NPVariant* variant) OVERRIDE {
 497     int new_value = IntFromNPVariant(*variant);
 498     if (bindings->instance()->GetMinWidthAttribute() != new_value) {
 499       UpdateDOMAttribute(bindings, base::IntToString(new_value));
 500       bindings->instance()->ParseSizeContraintsChanged();
 501     }
 502     return true;
 503   }
 504   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 505                               NPObject* np_obj) OVERRIDE {
 506     bindings->instance()->RemoveDOMAttribute(name());
 507     bindings->instance()->ParseSizeContraintsChanged();
 508   }
 509  private:
 510   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBindingMinWidth);
 511 };
 512
 513 class BrowserPluginPropertyBindingName
 514     : public BrowserPluginPropertyBinding {
 515  public:
 516   BrowserPluginPropertyBindingName()
 517       : BrowserPluginPropertyBinding(browser_plugin::kAttributeName) {
 518   }
 519   virtual bool GetProperty(BrowserPluginBindings* bindings,
 520                            NPVariant* result) OVERRIDE {
 521     std::string name = bindings->instance()->GetNameAttribute();
 522     return StringToNPVariant(name, result);
 523   }
 524   virtual bool SetProperty(BrowserPluginBindings* bindings,
 525                            NPObject* np_obj,
 526                            const NPVariant* variant) OVERRIDE {
 527     std::string new_value = StringFromNPVariant(*variant);
 528     if (bindings->instance()->GetNameAttribute() != new_value) {
 529       UpdateDOMAttribute(bindings, new_value);
 530       bindings->instance()->ParseNameAttribute();
 531     }
 532     return true;
 533   }
 534   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 535                               NPObject* np_obj) OVERRIDE {
 536     bindings->instance()->RemoveDOMAttribute(name());
 537     bindings->instance()->ParseNameAttribute();
 538   }
 539  private:
 540   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBindingName);
 541 };
 542
 543 class BrowserPluginPropertyBindingPartition
 544     : public BrowserPluginPropertyBinding {
 545  public:
 546   BrowserPluginPropertyBindingPartition()
 547       : BrowserPluginPropertyBinding(browser_plugin::kAttributePartition) {
 548   }
 549   virtual bool GetProperty(BrowserPluginBindings* bindings,
 550                            NPVariant* result) OVERRIDE {
 551     std::string partition_id = bindings->instance()->GetPartitionAttribute();
 552     return StringToNPVariant(partition_id, result);
 553   }
 554   virtual bool SetProperty(BrowserPluginBindings* bindings,
 555                            NPObject* np_obj,
 556                            const NPVariant* variant) OVERRIDE {
 557     std::string new_value = StringFromNPVariant(*variant);
 558     std::string old_value = bindings->instance()->GetPartitionAttribute();
 559     if (old_value != new_value) {
 560       UpdateDOMAttribute(bindings, new_value);
 561       std::string error_message;
 562       if (!bindings->instance()->ParsePartitionAttribute(&error_message)) {
 563         // Reset to old value on error.
 564         UpdateDOMAttribute(bindings, old_value);
 565         // Exceptions must be set as the last operation before returning to
 566         // script.
 567         WebBindings::setException(
 568             np_obj, static_cast<const NPUTF8 *>(error_message.c_str()));
 569         return false;
 570       }
 571     }
 572     return true;
 573   }
 574   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 575                               NPObject* np_obj) OVERRIDE {
 576     std::string error_message;
 577     if (bindings->instance()->CanRemovePartitionAttribute(&error_message)) {
 578       bindings->instance()->RemoveDOMAttribute(name());
 579     } else {
 580       WebBindings::setException(
 581           np_obj, static_cast<const NPUTF8 *>(error_message.c_str()));
 582     }
 583   }
 584  private:
 585   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBindingPartition);
 586 };
 587
 588 class BrowserPluginPropertyBindingSrc : public BrowserPluginPropertyBinding {
 589  public:
 590   BrowserPluginPropertyBindingSrc()
 591       : BrowserPluginPropertyBinding(browser_plugin::kAttributeSrc) {
 592   }
 593   virtual bool GetProperty(BrowserPluginBindings* bindings,
 594                            NPVariant* result) OVERRIDE {
 595     std::string src = bindings->instance()->GetSrcAttribute();
 596     return StringToNPVariant(src, result);
 597   }
 598   virtual bool SetProperty(BrowserPluginBindings* bindings,
 599                            NPObject* np_obj,
 600                            const NPVariant* variant) OVERRIDE {
 601     std::string new_value = StringFromNPVariant(*variant);
 602     // We should not be issuing navigation IPCs if we attempt to set the
 603     // src property to the empty string. Instead, we want to simply restore
 604     // the src attribute back to its old value.
 605     if (new_value.empty()) {
 606       return true;
 607     }
 608     std::string old_value = bindings->instance()->GetSrcAttribute();
 609     // If the new value was empty then we're effectively resetting the
 610     // attribute to the old value here. This will be picked up by <webview>'s
 611     // mutation observer and will restore the src attribute after it has been
 612     // removed.
 613     UpdateDOMAttribute(bindings, new_value);
 614     std::string error_message;
 615     if (!bindings->instance()->ParseSrcAttribute(&error_message)) {
 616       // Reset to old value on error.
 617       UpdateDOMAttribute(bindings, old_value);
 618       // Exceptions must be set as the last operation before returning to
 619       // script.
 620       WebBindings::setException(
 621           np_obj, static_cast<const NPUTF8 *>(error_message.c_str()));
 622       return false;
 623     }
 624     return true;
 625   }
 626   virtual void RemoveProperty(BrowserPluginBindings* bindings,
 627                               NPObject* np_obj) OVERRIDE {
 628     bindings->instance()->RemoveDOMAttribute(name());
 629   }
 630  private:
 631   DISALLOW_COPY_AND_ASSIGN(BrowserPluginPropertyBindingSrc);
 632 };
 633
 634
 635 // BrowserPluginBindings ------------------------------------------------------
 636
 637 BrowserPluginBindings::BrowserPluginNPObject::BrowserPluginNPObject() {
 638 }
 639
 640 BrowserPluginBindings::BrowserPluginNPObject::~BrowserPluginNPObject() {
 641 }
 642
 643 BrowserPluginBindings::BrowserPluginBindings(BrowserPlugin* instance)
 644     : instance_(instance),
 645       np_object_(NULL),
 646       weak_ptr_factory_(this) {
 647   NPObject* obj =
 648       WebBindings::createObject(instance->pluginNPP(),
 649                                 &browser_plugin_message_class);
 650   np_object_ = static_cast<BrowserPluginBindings::BrowserPluginNPObject*>(obj);
 651   np_object_->message_channel = weak_ptr_factory_.GetWeakPtr();
 652
 653   method_bindings_.push_back(new BrowserPluginBindingAttach);
 654
 655   property_bindings_.push_back(
 656       new BrowserPluginPropertyBindingAllowTransparency);
 657   property_bindings_.push_back(new BrowserPluginPropertyBindingAutoSize);
 658   property_bindings_.push_back(new BrowserPluginPropertyBindingContentWindow);
 659   property_bindings_.push_back(new BrowserPluginPropertyBindingMaxHeight);
 660   property_bindings_.push_back(new BrowserPluginPropertyBindingMaxWidth);
 661   property_bindings_.push_back(new BrowserPluginPropertyBindingMinHeight);
 662   property_bindings_.push_back(new BrowserPluginPropertyBindingMinWidth);
 663   property_bindings_.push_back(new BrowserPluginPropertyBindingName);
 664   property_bindings_.push_back(new BrowserPluginPropertyBindingPartition);
 665   property_bindings_.push_back(new BrowserPluginPropertyBindingSrc);
 666 }
 667
 668 BrowserPluginBindings::~BrowserPluginBindings() {
 669   WebBindings::releaseObject(np_object_);
 670 }
 671
 672 bool BrowserPluginBindings::HasMethod(NPIdentifier name) const {
 673   for (BindingList::const_iterator iter = method_bindings_.begin();
 674        iter != method_bindings_.end();
 675        ++iter) {
 676     if ((*iter)->MatchesName(name))
 677       return true;
 678   }
 679   return false;
 680 }
 681
 682 bool BrowserPluginBindings::InvokeMethod(NPIdentifier name,
 683                                          const NPVariant* args,
 684                                          uint32 arg_count,
 685                                          NPVariant* result) {
 686   for (BindingList::iterator iter = method_bindings_.begin();
 687        iter != method_bindings_.end();
 688        ++iter) {
 689     if ((*iter)->MatchesName(name) && (*iter)->arg_count() == arg_count)
 690       return (*iter)->Invoke(this, args, result);
 691   }
 692   return false;
 693 }
 694
 695 bool BrowserPluginBindings::HasProperty(NPIdentifier name) const {
 696   for (PropertyBindingList::const_iterator iter = property_bindings_.begin();
 697        iter != property_bindings_.end();
 698        ++iter) {
 699     if ((*iter)->MatchesName(name))
 700       return true;
 701   }
 702   return false;
 703 }
 704
 705 bool BrowserPluginBindings::SetProperty(NPObject* np_obj,
 706                                         NPIdentifier name,
 707                                         const NPVariant* variant) {
 708   for (PropertyBindingList::iterator iter = property_bindings_.begin();
 709        iter != property_bindings_.end();
 710        ++iter) {
 711     if ((*iter)->MatchesName(name)) {
 712       if ((*iter)->SetProperty(this, np_obj, variant)) {
 713         return true;
 714       }
 715       break;
 716     }
 717   }
 718   return false;
 719 }
 720
 721 bool BrowserPluginBindings::RemoveProperty(NPObject* np_obj,
 722                                            NPIdentifier name) {
 723   for (PropertyBindingList::iterator iter = property_bindings_.begin();
 724        iter != property_bindings_.end();
 725        ++iter) {
 726     if ((*iter)->MatchesName(name)) {
 727       (*iter)->RemoveProperty(this, np_obj);
 728       return true;
 729     }
 730   }
 731   return false;
 732 }
 733
 734 bool BrowserPluginBindings::GetProperty(NPIdentifier name, NPVariant* result) {
 735   for (PropertyBindingList::iterator iter = property_bindings_.begin();
 736        iter != property_bindings_.end();
 737        ++iter) {
 738     if ((*iter)->MatchesName(name))
 739       return (*iter)->GetProperty(this, result);
 740   }
 741   return false;
 742 }
 743
 744 }  // namespace content