Move EventBindings to //extensions

chrome/renderer/extensions/event_bindings.cc

Index: chrome/renderer/extensions/event_bindings.cc
diff --git a/chrome/renderer/extensions/event_bindings.cc b/chrome/renderer/extensions/event_bindings.cc
deleted file mode 100644
index 71ce6fb6a63db038a4bd2ca99b32c91f36323d08..0000000000000000000000000000000000000000
--- a/chrome/renderer/extensions/event_bindings.cc
+++ /dev/null
@@ -1,338 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/renderer/extensions/event_bindings.h"
-
-#include <map>
-#include <set>
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/bind.h"
-#include "base/lazy_instance.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_loop.h"
-#include "chrome/common/extensions/value_counter.h"
-#include "chrome/common/url_constants.h"
-#include "chrome/renderer/extensions/chrome_v8_context.h"
-#include "chrome/renderer/extensions/chrome_v8_context_set.h"
-#include "chrome/renderer/extensions/chrome_v8_extension.h"
-#include "chrome/renderer/extensions/dispatcher.h"
-#include "chrome/renderer/extensions/extension_helper.h"
-#include "chrome/renderer/extensions/user_script_slave.h"
-#include "content/public/renderer/render_thread.h"
-#include "content/public/renderer/render_view.h"
-#include "content/public/renderer/v8_value_converter.h"
-#include "extensions/common/event_filter.h"
-#include "extensions/common/extension.h"
-#include "extensions/common/extension_messages.h"
-#include "extensions/common/manifest_handlers/background_info.h"
-#include "extensions/common/view_type.h"
-#include "grit/renderer_resources.h"
-#include "third_party/WebKit/public/platform/WebURL.h"
-#include "third_party/WebKit/public/platform/WebURLRequest.h"
-#include "third_party/WebKit/public/web/WebDocument.h"
-#include "third_party/WebKit/public/web/WebFrame.h"
-#include "third_party/WebKit/public/web/WebView.h"
-#include "url/gurl.h"
-#include "v8/include/v8.h"
-
-using blink::WebFrame;
-using blink::WebURL;
-using content::RenderThread;
-
-namespace extensions {
-
-namespace {
-
-// A map of event names to the number of contexts listening to that event.
-// We notify the browser about event listeners when we transition between 0
-// and 1.
-typedef std::map<std::string, int> EventListenerCounts;
-
-// A map of extension IDs to listener counts for that extension.
-base::LazyInstance<std::map<std::string, EventListenerCounts> >
-    g_listener_counts = LAZY_INSTANCE_INITIALIZER;
-
-// A map of event names to a (filter -> count) map. The map is used to keep
-// track of which filters are in effect for which events.
-// We notify the browser about filtered event listeners when we transition
-// between 0 and 1.
-typedef std::map<std::string, linked_ptr<ValueCounter> >
-    FilteredEventListenerCounts;
-
-// A map of extension IDs to filtered listener counts for that extension.
-base::LazyInstance<std::map<std::string, FilteredEventListenerCounts> >
-    g_filtered_listener_counts = LAZY_INSTANCE_INITIALIZER;
-
-base::LazyInstance<EventFilter> g_event_filter = LAZY_INSTANCE_INITIALIZER;
-
-// TODO(koz): Merge this into EventBindings.
-class ExtensionImpl : public ChromeV8Extension {
- public:
-  explicit ExtensionImpl(Dispatcher* dispatcher, ChromeV8Context* context)
-      : ChromeV8Extension(dispatcher, context) {
-    RouteFunction("AttachEvent",
-        base::Bind(&ExtensionImpl::AttachEvent, base::Unretained(this)));
-    RouteFunction("DetachEvent",
-        base::Bind(&ExtensionImpl::DetachEvent, base::Unretained(this)));
-    RouteFunction("AttachFilteredEvent",
-        base::Bind(&ExtensionImpl::AttachFilteredEvent,
-                   base::Unretained(this)));
-    RouteFunction("DetachFilteredEvent",
-        base::Bind(&ExtensionImpl::DetachFilteredEvent,
-                   base::Unretained(this)));
-    RouteFunction("MatchAgainstEventFilter",
-        base::Bind(&ExtensionImpl::MatchAgainstEventFilter,
-                   base::Unretained(this)));
-  }
-
-  virtual ~ExtensionImpl() {}
-
-  // Attach an event name to an object.
-  void AttachEvent(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    CHECK_EQ(1, args.Length());
-    CHECK(args[0]->IsString());
-
-    std::string event_name = *v8::String::Utf8Value(args[0]->ToString());
-
-    if (!dispatcher_->CheckContextAccessToExtensionAPI(event_name, context()))
-      return;
-
-    std::string extension_id = context()->GetExtensionID();
-    EventListenerCounts& listener_counts =
-        g_listener_counts.Get()[extension_id];
-    if (++listener_counts[event_name] == 1) {
-      content::RenderThread::Get()->Send(
-          new ExtensionHostMsg_AddListener(extension_id, event_name));
-    }
-
-    // This is called the first time the page has added a listener. Since
-    // the background page is the only lazy page, we know this is the first
-    // time this listener has been registered.
-    if (IsLazyBackgroundPage(GetRenderView(), context()->extension())) {
-      content::RenderThread::Get()->Send(
-          new ExtensionHostMsg_AddLazyListener(extension_id, event_name));
-    }
-  }
-
-  void DetachEvent(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    CHECK_EQ(2, args.Length());
-    CHECK(args[0]->IsString());
-    CHECK(args[1]->IsBoolean());
-
-    std::string event_name = *v8::String::Utf8Value(args[0]);
-    bool is_manual = args[1]->BooleanValue();
-
-    std::string extension_id = context()->GetExtensionID();
-    EventListenerCounts& listener_counts =
-        g_listener_counts.Get()[extension_id];
-
-    if (--listener_counts[event_name] == 0) {
-      content::RenderThread::Get()->Send(
-          new ExtensionHostMsg_RemoveListener(extension_id, event_name));
-    }
-
-    // DetachEvent is called when the last listener for the context is
-    // removed. If the context is the background page, and it removes the
-    // last listener manually, then we assume that it is no longer interested
-    // in being awakened for this event.
-    if (is_manual && IsLazyBackgroundPage(GetRenderView(),
-                                          context()->extension())) {
-      content::RenderThread::Get()->Send(
-          new ExtensionHostMsg_RemoveLazyListener(extension_id, event_name));
-    }
-  }
-
-  // MatcherID AttachFilteredEvent(string event_name, object filter)
-  // event_name - Name of the event to attach.
-  // filter - Which instances of the named event are we interested in.
-  // returns the id assigned to the listener, which will be returned from calls
-  // to MatchAgainstEventFilter where this listener matches.
-  void AttachFilteredEvent(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    CHECK_EQ(2, args.Length());
-    CHECK(args[0]->IsString());
-    CHECK(args[1]->IsObject());
-
-    std::string event_name = *v8::String::Utf8Value(args[0]);
-
-    // This method throws an exception if it returns false.
-    if (!dispatcher_->CheckContextAccessToExtensionAPI(event_name, context()))
-      return;
-
-    std::string extension_id = context()->GetExtensionID();
-    if (extension_id.empty()) {
-      args.GetReturnValue().Set(static_cast<int32_t>(-1));
-      return;
-    }
-
-    scoped_ptr<base::DictionaryValue> filter;
-    scoped_ptr<content::V8ValueConverter> converter(
-        content::V8ValueConverter::create());
-
-    base::DictionaryValue* filter_dict = NULL;
-    base::Value* filter_value =
-        converter->FromV8Value(args[1]->ToObject(), context()->v8_context());
-    if (!filter_value) {
-      args.GetReturnValue().Set(static_cast<int32_t>(-1));
-      return;
-    }
-    if (!filter_value->GetAsDictionary(&filter_dict)) {
-      delete filter_value;
-      args.GetReturnValue().Set(static_cast<int32_t>(-1));
-      return;
-    }
-
-    filter.reset(filter_dict);
-    EventFilter& event_filter = g_event_filter.Get();
-    int id = event_filter.AddEventMatcher(event_name, ParseEventMatcher(
-        filter.get()));
-
-    // Only send IPCs the first time a filter gets added.
-    if (AddFilter(event_name, extension_id, filter.get())) {
-      bool lazy = IsLazyBackgroundPage(GetRenderView(), context()->extension());
-      content::RenderThread::Get()->Send(
-          new ExtensionHostMsg_AddFilteredListener(extension_id, event_name,
-                                                   *filter, lazy));
-    }
-
-    args.GetReturnValue().Set(static_cast<int32_t>(id));
-  }
-
-  // Add a filter to |event_name| in |extension_id|, returning true if it
-  // was the first filter for that event in that extension.
-  static bool AddFilter(const std::string& event_name,
-                        const std::string& extension_id,
-                        base::DictionaryValue* filter) {
-    FilteredEventListenerCounts& counts =
-        g_filtered_listener_counts.Get()[extension_id];
-    FilteredEventListenerCounts::iterator it = counts.find(event_name);
-    if (it == counts.end())
-      counts[event_name].reset(new ValueCounter);
-
-    int result = counts[event_name]->Add(*filter);
-    return 1 == result;
-  }
-
-  // Remove a filter from |event_name| in |extension_id|, returning true if it
-  // was the last filter for that event in that extension.
-  static bool RemoveFilter(const std::string& event_name,
-                           const std::string& extension_id,
-                           base::DictionaryValue* filter) {
-    FilteredEventListenerCounts& counts =
-        g_filtered_listener_counts.Get()[extension_id];
-    FilteredEventListenerCounts::iterator it = counts.find(event_name);
-    if (it == counts.end())
-      return false;
-    return 0 == it->second->Remove(*filter);
-  }
-
-  // void DetachFilteredEvent(int id, bool manual)
-  // id     - Id of the event to detach.
-  // manual - false if this is part of the extension unload process where all
-  //          listeners are automatically detached.
-  void DetachFilteredEvent(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    CHECK_EQ(2, args.Length());
-    CHECK(args[0]->IsInt32());
-    CHECK(args[1]->IsBoolean());
-    bool is_manual = args[1]->BooleanValue();
-
-    std::string extension_id = context()->GetExtensionID();
-    if (extension_id.empty())
-      return;
-
-    int matcher_id = args[0]->Int32Value();
-    EventFilter& event_filter = g_event_filter.Get();
-    EventMatcher* event_matcher =
-        event_filter.GetEventMatcher(matcher_id);
-
-    const std::string& event_name = event_filter.GetEventName(matcher_id);
-
-    // Only send IPCs the last time a filter gets removed.
-    if (RemoveFilter(event_name, extension_id, event_matcher->value())) {
-      bool lazy = is_manual && IsLazyBackgroundPage(GetRenderView(),
-                                                    context()->extension());
-      content::RenderThread::Get()->Send(
-          new ExtensionHostMsg_RemoveFilteredListener(extension_id, event_name,
-                                                      *event_matcher->value(),
-                                                      lazy));
-    }
-
-    event_filter.RemoveEventMatcher(matcher_id);
-  }
-
-  void MatchAgainstEventFilter(
-      const v8::FunctionCallbackInfo<v8::Value>& args) {
-    v8::Isolate* isolate = args.GetIsolate();
-    typedef std::set<EventFilter::MatcherID> MatcherIDs;
-    EventFilter& event_filter = g_event_filter.Get();
-    std::string event_name = *v8::String::Utf8Value(args[0]->ToString());
-    EventFilteringInfo info =
-        ParseFromObject(args[1]->ToObject(), isolate);
-    // Only match events routed to this context's RenderView or ones that don't
-    // have a routingId in their filter.
-    MatcherIDs matched_event_filters = event_filter.MatchEvent(
-        event_name, info, context()->GetRenderView()->GetRoutingID());
-    v8::Handle<v8::Array> array(
-        v8::Array::New(isolate, matched_event_filters.size()));
-    int i = 0;
-    for (MatcherIDs::iterator it = matched_event_filters.begin();
-         it != matched_event_filters.end(); ++it) {
-      array->Set(v8::Integer::New(isolate, i++),
-                 v8::Integer::New(isolate, *it));
-    }
-    args.GetReturnValue().Set(array);
-  }
-
-  static EventFilteringInfo ParseFromObject(v8::Handle<v8::Object> object,
-                                            v8::Isolate* isolate) {
-    EventFilteringInfo info;
-    v8::Handle<v8::String> url(v8::String::NewFromUtf8(isolate, "url"));
-    if (object->Has(url)) {
-      v8::Handle<v8::Value> url_value(object->Get(url));
-      info.SetURL(GURL(*v8::String::Utf8Value(url_value)));
-    }
-    v8::Handle<v8::String> instance_id(
-        v8::String::NewFromUtf8(isolate, "instanceId"));
-    if (object->Has(instance_id)) {
-      v8::Handle<v8::Value> instance_id_value(object->Get(instance_id));
-      info.SetInstanceID(instance_id_value->IntegerValue());
-    }
-    v8::Handle<v8::String> service_type(
-        v8::String::NewFromUtf8(isolate, "serviceType"));
-    if (object->Has(service_type)) {
-      v8::Handle<v8::Value> service_type_value(object->Get(service_type));
-      info.SetServiceType(*v8::String::Utf8Value(service_type_value));
-    }
-    return info;
-  }
-
- private:
-  static bool IsLazyBackgroundPage(content::RenderView* render_view,
-                                   const Extension* extension) {
-    if (!render_view)
-      return false;
-    ExtensionHelper* helper = ExtensionHelper::Get(render_view);
-    return (extension && BackgroundInfo::HasLazyBackgroundPage(extension) &&
-            helper->view_type() == VIEW_TYPE_EXTENSION_BACKGROUND_PAGE);
-  }
-
-  scoped_ptr<EventMatcher> ParseEventMatcher(
-      base::DictionaryValue* filter_dict) {
-    return scoped_ptr<EventMatcher>(new EventMatcher(
-        scoped_ptr<base::DictionaryValue>(filter_dict->DeepCopy()),
-            context()->GetRenderView()->GetRoutingID()));
-  }
-};
-
-}  // namespace
-
-// static
-ChromeV8Extension* EventBindings::Create(Dispatcher* dispatcher,
-                                         ChromeV8Context* context) {
-  return new ExtensionImpl(dispatcher, context);
-}
-
-}  // namespace extensions