Add audible, muted to Tab, c.t.query, c.t.update, and c.t.onUpdated where relevant

chrome/browser/extensions/api/tabs/tabs_event_router.cc

Index: chrome/browser/extensions/api/tabs/tabs_event_router.cc
diff --git a/chrome/browser/extensions/api/tabs/tabs_event_router.cc b/chrome/browser/extensions/api/tabs/tabs_event_router.cc
index 5c187402a2778f007e44130141624c6594ad5c9f..abf5243e991e0bd01abc97214ddd362cb3bed561 100644
--- a/chrome/browser/extensions/api/tabs/tabs_event_router.cc
+++ b/chrome/browser/extensions/api/tabs/tabs_event_router.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/extensions/api/tabs/tabs_event_router.h"
 
+#include "base/command_line.h"
 #include "base/json/json_writer.h"
 #include "base/values.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ -16,6 +17,8 @@
 #include "chrome/browser/ui/browser_iterator.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/browser/ui/tabs/tab_utils.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "components/favicon/content/content_favicon_driver.h"
 #include "content/public/browser/favicon_status.h"
@@ -59,40 +62,58 @@ bool WillDispatchTabUpdatedEvent(
 
 }  // namespace
 
-TabsEventRouter::TabEntry::TabEntry() : complete_waiting_on_load_(false),
-                                        url_() {
+TabsEventRouter::TabEntry::TabEntry(content::WebContents* contents)
+    : contents_(contents),
+      complete_waiting_on_load_(false),
+      was_audible_(contents->WasRecentlyAudible()),
+      was_muted_(contents->IsAudioMuted()) {
 }
 
-base::DictionaryValue* TabsEventRouter::TabEntry::UpdateLoadState(
-    const WebContents* contents) {
+scoped_ptr<base::DictionaryValue> TabsEventRouter::TabEntry::UpdateLoadState() {
   // The tab may go in & out of loading (for instance if iframes navigate).
   // We only want to respond to the first change from loading to !loading after
   // the NAV_ENTRY_COMMITTED was fired.
-  if (!complete_waiting_on_load_ || contents->IsLoading())
-    return NULL;
+  scoped_ptr<base::DictionaryValue> changed_properties(
+      new base::DictionaryValue());
+  if (!complete_waiting_on_load_ || contents_->IsLoading()) {
+    return changed_properties.Pass();
+  }
 
   // Send "complete" state change.
   complete_waiting_on_load_ = false;
-  base::DictionaryValue* changed_properties = new base::DictionaryValue();
   changed_properties->SetString(tabs_constants::kStatusKey,
                                 tabs_constants::kStatusValueComplete);
-  return changed_properties;
+  return changed_properties.Pass();
 }
 
-base::DictionaryValue* TabsEventRouter::TabEntry::DidNavigate(
-    const WebContents* contents) {
+scoped_ptr<base::DictionaryValue> TabsEventRouter::TabEntry::DidNavigate() {
   // Send "loading" state change.
   complete_waiting_on_load_ = true;
-  base::DictionaryValue* changed_properties = new base::DictionaryValue();
+  scoped_ptr<base::DictionaryValue> changed_properties(
+      new base::DictionaryValue());
   changed_properties->SetString(tabs_constants::kStatusKey,
                                 tabs_constants::kStatusValueLoading);
 
-  if (contents->GetURL() != url_) {
-    url_ = contents->GetURL();
+  if (contents_->GetURL() != url_) {
+    url_ = contents_->GetURL();
     changed_properties->SetString(tabs_constants::kUrlKey, url_.spec());
   }
 
-  return changed_properties;
+  return changed_properties.Pass();
+}
+
+bool TabsEventRouter::TabEntry::SetAudible(bool new_val) {
+  if (was_audible_ == new_val)
+    return false;
+  was_audible_ = new_val;
+  return true;
+}
+
+bool TabsEventRouter::TabEntry::SetMuted(bool new_val) {
+  if (was_muted_ == new_val)
+    return false;
+  was_muted_ = new_val;
+  return true;
 }
 
 TabsEventRouter::TabsEventRouter(Profile* profile)
@@ -112,7 +133,7 @@ TabsEventRouter::TabsEventRouter(Profile* profile)
       for (int i = 0; i < browser->tab_strip_model()->count(); ++i) {
         WebContents* contents = browser->tab_strip_model()->GetWebContentsAt(i);
         int tab_id = ExtensionTabUtil::GetTabId(contents);
-        tab_entries_[tab_id] = TabEntry();
+        tab_entries_[tab_id] = make_linked_ptr(new TabEntry(contents));
       }
     }
   }
@@ -217,8 +238,8 @@ void TabsEventRouter::TabInsertedAt(WebContents* contents,
                                     bool active) {
   // If tab is new, send created event.
   int tab_id = ExtensionTabUtil::GetTabId(contents);
-  if (!GetTabEntry(contents)) {
-    tab_entries_[tab_id] = TabEntry();
+  if (GetTabEntry(contents).get() == NULL) {
+    tab_entries_[tab_id] = make_linked_ptr(new TabEntry(contents));
 
     TabCreatedAt(contents, index, active);
     return;
@@ -241,7 +262,7 @@ void TabsEventRouter::TabInsertedAt(WebContents* contents,
 }
 
 void TabsEventRouter::TabDetachedAt(WebContents* contents, int index) {
-  if (!GetTabEntry(contents)) {
+  if (GetTabEntry(contents).get() == NULL) {
     // The tab was removed. Don't send detach event.
     return;
   }
@@ -393,20 +414,30 @@ void TabsEventRouter::TabMoved(WebContents* contents,
                 EventRouter::USER_GESTURE_UNKNOWN);
 }
 
-void TabsEventRouter::TabUpdated(WebContents* contents, bool did_navigate) {
-  TabEntry* entry = GetTabEntry(contents);
-  scoped_ptr<base::DictionaryValue> changed_properties;
+void TabsEventRouter::TabUpdated(
+    linked_ptr<TabEntry> entry,
+    scoped_ptr<base::DictionaryValue> changed_properties) {
+  CHECK(entry->web_contents());
 
-  if (!entry)
-    return;
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableTabAudioMuting)) {
+    bool audible = entry->web_contents()->WasRecentlyAudible();
+    if (entry->SetAudible(audible)) {
+      changed_properties->SetBoolean(tabs_constants::kAudibleKey, audible);
+    }
 
-  if (did_navigate)
-    changed_properties.reset(entry->DidNavigate(contents));
-  else
-    changed_properties.reset(entry->UpdateLoadState(contents));
+    bool muted = entry->web_contents()->IsAudioMuted();
+    if (entry->SetMuted(muted)) {
+      changed_properties->SetBoolean(tabs_constants::kMutedKey, muted);
+      changed_properties->SetString(
+          tabs_constants::kMutedCauseKey,
+          chrome::GetTabAudioMutedCause(entry->web_contents()));
+    }
+  }
 
-  if (changed_properties)
-    DispatchTabUpdatedEvent(contents, changed_properties.Pass());
+  if (!changed_properties->empty()) {
+    DispatchTabUpdatedEvent(entry->web_contents(), changed_properties.Pass());
+  }
 }
 
 void TabsEventRouter::FaviconUrlUpdated(WebContents* contents) {
@@ -483,12 +514,14 @@ void TabsEventRouter::DispatchTabUpdatedEvent(
   EventRouter::Get(profile)->BroadcastEvent(event.Pass());
 }
 
-TabsEventRouter::TabEntry* TabsEventRouter::GetTabEntry(WebContents* contents) {
+linked_ptr<TabsEventRouter::TabEntry> TabsEventRouter::GetTabEntry(
+    WebContents* contents) {
   int tab_id = ExtensionTabUtil::GetTabId(contents);
-  std::map<int, TabEntry>::iterator i = tab_entries_.find(tab_id);
+
+  TabEntryMap::iterator i = tab_entries_.find(tab_id);
   if (tab_entries_.end() == i)
-    return NULL;
-  return &i->second;
+    return linked_ptr<TabEntry>(NULL);
+  return i->second;
 }
 
 void TabsEventRouter::Observe(int type,
@@ -497,7 +530,10 @@ void TabsEventRouter::Observe(int type,
   if (type == content::NOTIFICATION_NAV_ENTRY_COMMITTED) {
     NavigationController* source_controller =
         content::Source<NavigationController>(source).ptr();
-    TabUpdated(source_controller->GetWebContents(), true);
+    linked_ptr<TabEntry> entry =
+        GetTabEntry(source_controller->GetWebContents());
+    CHECK(entry.get());
+    TabUpdated(entry, (entry.get())->DidNavigate());
   } else if (type == content::NOTIFICATION_WEB_CONTENTS_DESTROYED) {
     // Tab was destroyed after being detached (without being re-attached).
     WebContents* contents = content::Source<WebContents>(source).ptr();
@@ -515,7 +551,9 @@ void TabsEventRouter::Observe(int type,
 void TabsEventRouter::TabChangedAt(WebContents* contents,
                                    int index,
                                    TabChangeType change_type) {
-  TabUpdated(contents, false);
+  linked_ptr<TabEntry> entry = GetTabEntry(contents);
+  CHECK(entry.get());
+  TabUpdated(entry, (entry.get())->UpdateLoadState());
 }
 
 void TabsEventRouter::TabReplacedAt(TabStripModel* tab_strip_model,
@@ -540,8 +578,8 @@ void TabsEventRouter::TabReplacedAt(TabStripModel* tab_strip_model,
   DCHECK_GT(removed_count, 0);
   UnregisterForTabNotifications(old_contents);
 
-  if (!GetTabEntry(new_contents)) {
-    tab_entries_[new_tab_id] = TabEntry();
+  if (GetTabEntry(new_contents).get() == NULL) {
+    tab_entries_[new_tab_id] = make_linked_ptr(new TabEntry(new_contents));
     RegisterForTabNotifications(new_contents);
   }
 }