Bug 1241959 - Add a description of e10s blocked status to about:support. r=jimm

--HG--
extra : commitid : 5r0m9Ql2GBC

browser/components/preferences/in-content/main.js

@@ -83,38 +83,21 @@ var gMainPane = {
     setEventListener("e10sAutoStart", "command",
                      gMainPane.enableE10SChange);
     let e10sCheckbox = document.getElementById("e10sAutoStart");
-    e10sCheckbox.checked = Services.appinfo.browserTabsRemoteAutostart;
 
-    // If e10s is blocked for some reason unrelated to prefs, we want to disable
-    // the checkbox.
-    if (!Services.appinfo.browserTabsRemoteAutostart) {
-      let e10sBlockedReason = Cc["@mozilla.org/supports-string;1"].createInstance(Ci.nsISupportsString);
-      let appinfo = Services.appinfo.QueryInterface(Ci.nsIObserver);
-      appinfo.observe(e10sBlockedReason, "getE10SBlocked", "")
-      if (e10sBlockedReason.data) {
-        if (e10sBlockedReason.data == "Safe mode") {
-          // If the only reason we're disabled is because of safe mode, then
-          // we want to allow the user to un-toggle the pref.
-          // We're relying on the nsAppRunner code only specifying "Safe mode"
-          // as the reason if the pref is otherwise enabled, and there are no
-          // other reasons to block e10s.
-          // Update the checkbox to reflect the pref state.
-          e10sCheckbox.checked = true;
-        } else {
-          e10sCheckbox.disabled = true;
-          let updateChannel = UpdateUtils.UpdateChannel;
-          // only add this label on developer channels
-          if (updateChannel == "default" ||
-              updateChannel == "nightly" ||
-              updateChannel == "aurora") {
-            e10sCheckbox.label += " (disabled: " + e10sBlockedReason.data + ")";
-          }
-        }
-      }
+    let e10sPref = document.getElementById("browser.tabs.remote.autostart");
+    let e10sTempPref = document.getElementById("e10sTempPref");
+    let e10sForceEnable = document.getElementById("e10sForceEnable");
+
+    let preffedOn = e10sPref.value || e10sTempPref.value || e10sForceEnable.value;
+
+    if (preffedOn) {
+      // The checkbox is checked if e10s is preffed on.
+      e10sCheckbox.checked = true;
+
+      // but if it's force disabled, then the checkbox is disabled.
+      e10sCheckbox.disabled = !Services.appinfo.browserTabsRemoteAutostart;
     }
 
-    // If E10S is blocked because of safe mode, we want the checkbox to be
-    // enabled
 #endif
 
 #ifdef MOZ_DEV_EDITION

browser/components/preferences/in-content/main.xul

@@ -16,6 +16,9 @@
     <preference id="e10sTempPref"
                 name="browser.tabs.remote.autostart.2"
                 type="bool"/>
+    <preference id="e10sForceEnable"
+                name="browser.tabs.remote.force-enable"
+                type="bool"/>
 #endif
 
     <!-- Startup -->

toolkit/content/aboutSupport.js

@@ -46,8 +46,23 @@ var snapshotFormatters = {
     if (data.updateChannel)
       $("updatechannel-box").textContent = data.updateChannel;
 
-    $("multiprocess-box").textContent = stringBundle().formatStringFromName("multiProcessStatus",
-      [data.numRemoteWindows, data.numTotalWindows, data.remoteAutoStart], 3);
+    let statusStrName = ".unknown";
+
+    // Whitelist of known values with string descriptions:
+    switch (data.autoStartStatus) {
+      case 0:
+      case 1:
+      case 2:
+      case 4:
+      case 5:
+      case 6:
+      case 7:
+        statusStrName = "." + data.autoStartStatus;
+    }
+
+    let statusText = stringBundle().GetStringFromName("multiProcessStatus" + statusStrName);
+    $("multiprocess-box").textContent = stringBundle().formatStringFromName("multiProcessWindows",
+      [data.numRemoteWindows, data.numTotalWindows, statusText], 3);
 
     $("safemode-box").textContent = data.safeMode;
   },

toolkit/locales/en-US/chrome/global/aboutSupport.properties

@@ -96,9 +96,18 @@ canSandboxContent = Content Process Sandboxing
 canSandboxMedia = Media Plugin Sandboxing
 
 # LOCALIZATION NOTE %1$S and %2$S will be replaced with the number of remote and the total number
-# of windows, respectively, while %3$S will indicate whether windows are remote by default ('true'
-# or 'false')
-multiProcessStatus = %1$S/%2$S (default: %3$S)
+# of windows, respectively, while %3$S will be replaced with one of the status strings below,
+# which contains a description of the multi-process preference and status.
+# Note: multiProcessStatus.3 doesn't exist because status=3 was deprecated.
+multiProcessWindows = %1$S/%2$S (%3$S)
+multiProcessStatus.0 = Enabled by user
+multiProcessStatus.1 = Enabled by default
+multiProcessStatus.2 = Disabled
+multiProcessStatus.4 = Disabled by accessibility tools
+multiProcessStatus.5 = Disabled by lack of graphics hardware acceleration
+multiProcessStatus.6 = Disabled by unsupported text input
+multiProcessStatus.7 = Disabled by add-ons
+multiProcessStatus.unknown = Unknown status
 
 asyncPanZoom = Asynchronous Pan/Zoom
 apzNone = none

toolkit/modules/Troubleshoot.jsm

@@ -219,6 +219,16 @@ var dataProviders = {
 
     data.remoteAutoStart = Services.appinfo.browserTabsRemoteAutostart;
 
+    try {
+      let e10sStatus = Cc["@mozilla.org/supports-PRUint64;1"]
+                         .createInstance(Ci.nsISupportsPRUint64);
+      let appinfo = Services.appinfo.QueryInterface(Ci.nsIObserver);
+      appinfo.observe(e10sStatus, "getE10SBlocked", "");
+      data.autoStartStatus = e10sStatus.data;
+    } catch (e) {
+      data.autoStartStatus = -1;
+    }
+
     done(data);
   },
 

toolkit/xre/nsAppRunner.cpp

@@ -995,17 +995,17 @@ nsXULAppInfo::GetProcessID(uint32_t* aResult)
 }
 
 static bool gBrowserTabsRemoteAutostart = false;
-static nsString gBrowserTabsRemoteDisabledReason;
+static uint64_t gBrowserTabsRemoteStatus = 0;
 static bool gBrowserTabsRemoteAutostartInitialized = false;
 
 NS_IMETHODIMP
 nsXULAppInfo::Observe(nsISupports *aSubject, const char *aTopic, const char16_t *aData) {
   if (!nsCRT::strcmp(aTopic, "getE10SBlocked")) {
-    nsCOMPtr<nsISupportsString> ret = do_QueryInterface(aSubject);
+    nsCOMPtr<nsISupportsPRUint64> ret = do_QueryInterface(aSubject);
     if (!ret)
       return NS_ERROR_FAILURE;
 
-    ret->SetData(gBrowserTabsRemoteDisabledReason);
+    ret->SetData(gBrowserTabsRemoteStatus);
 
     return NS_OK;
   }
@@ -4631,19 +4631,7 @@ XRE_IsContentProcess()
   return XRE_GetProcessType() == GeckoProcessType_Content;
 }
 
-static void
-LogE10sBlockedReason(const char *reason) {
-  gBrowserTabsRemoteDisabledReason.Assign(NS_ConvertASCIItoUTF16(reason));
-
-  nsAutoString msg(NS_LITERAL_STRING("==================\nE10s has been blocked from running because:\n"));
-  msg.Append(gBrowserTabsRemoteDisabledReason);
-  msg.AppendLiteral("\n==================\n");
-  nsCOMPtr<nsIConsoleService> console(do_GetService("@mozilla.org/consoleservice;1"));
-  if (console) {
-    console->LogStringMessage(msg.get());
-  }
-}
-
+// If you add anything to this enum, please update about:support to reflect it
 enum {
   kE10sEnabledByUser = 0,
   kE10sEnabledByDefault = 1,
@@ -4773,13 +4761,10 @@ mozilla::BrowserTabsRemoteAutostart()
   if (e10sAllowed && prefEnabled) {
     if (disabledForA11y) {
       status = kE10sDisabledForAccessibility;
-      LogE10sBlockedReason("An accessibility tool is or was active. See bug 1198459.");
     } else if (disabledForBidi) {
       status = kE10sDisabledForBidi;
-      LogE10sBlockedReason("Disabled for RTL locales due to broken bidi detection.");
     } else if (addonsCanDisable && disabledByAddons) {
       status = kE10sDisabledForAddons;
-      LogE10sBlockedReason("3rd party add-ons are installed and enabled.");
     } else {
       gBrowserTabsRemoteAutostart = true;
     }
@@ -4817,9 +4802,7 @@ mozilla::BrowserTabsRemoteAutostart()
 
     if (accelDisabled) {
       gBrowserTabsRemoteAutostart = false;
-
       status = kE10sDisabledForMacGfx;
-      LogE10sBlockedReason("Hardware acceleration is disabled");
     }
   }
 #endif // defined(XP_MACOSX)
@@ -4831,6 +4814,8 @@ mozilla::BrowserTabsRemoteAutostart()
     status = kE10sEnabledByUser;
   }
 
+  gBrowserTabsRemoteStatus = status;
+
   mozilla::Telemetry::Accumulate(mozilla::Telemetry::E10S_STATUS, status);
   if (Preferences::GetBool("browser.enabledE10SFromPrompt", false)) {
     mozilla::Telemetry::Accumulate(mozilla::Telemetry::E10S_STILL_ACCEPTED_FROM_PROMPT,