Bug 1096093 - Add infrastructure for LookAndFeel metric caching, and allowing the parent process to send down cache to content process. r=jimm.

dom/ipc/ContentChild.cpp

@@ -23,6 +23,7 @@
 #ifdef ACCESSIBILITY
 #include "mozilla/a11y/DocAccessibleChild.h"
 #endif
+#include "mozilla/LookAndFeel.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/ProcessHangMonitorIPC.h"
 #include "mozilla/docshell/OfflineCacheUpdateChild.h"
@@ -53,6 +54,7 @@
 #include "mozilla/net/NeckoChild.h"
 #include "mozilla/plugins/PluginInstanceParent.h"
 #include "mozilla/plugins/PluginModuleParent.h"
+#include "mozilla/widget/WidgetMessageUtils.h"
 
 #if defined(MOZ_CONTENT_SANDBOX)
 #if defined(XP_WIN)

dom/ipc/ContentParent.cpp

@@ -76,6 +76,7 @@
 #include "mozilla/layers/CompositorParent.h"
 #include "mozilla/layers/ImageBridgeParent.h"
 #include "mozilla/layers/SharedBufferManagerParent.h"
+#include "mozilla/LookAndFeel.h"
 #include "mozilla/net/NeckoParent.h"
 #include "mozilla/plugins/PluginBridge.h"
 #include "mozilla/Preferences.h"
@@ -2887,6 +2888,7 @@ ContentParent::RecvAddNewProcess(const uint32_t& aPid,
     InfallibleTArray<nsString> unusedDictionaries;
     ClipboardCapabilities clipboardCaps;
     DomainPolicyClone domainPolicy;
+
     RecvGetXPCOMProcessAttributes(&isOffline, &isLangRTL, &unusedDictionaries,
                                   &clipboardCaps, &domainPolicy);
     mozilla::unused << content->SendSetOffline(isOffline);
@@ -4037,6 +4039,13 @@ ContentParent::RecvGetSystemMemory(const uint64_t& aGetterId)
     return true;
 }
 
+bool
+ContentParent::RecvGetLookAndFeelCache(nsTArray<LookAndFeelInt>&& aLookAndFeelIntCache)
+{
+    aLookAndFeelIntCache = LookAndFeel::GetIntCache();
+    return true;
+}
+
 bool
 ContentParent::RecvIsSecureURI(const uint32_t& type,
                                const URIParams& uri,

dom/ipc/ContentParent.h

@@ -543,8 +543,7 @@ private:
                                                bool* aIsLangRTL,
                                                InfallibleTArray<nsString>* dictionaries,
                                                ClipboardCapabilities* clipboardCaps,
-                                               DomainPolicyClone* domainPolicy)
-        override;
+                                               DomainPolicyClone* domainPolicy) override;
 
     virtual bool DeallocPJavaScriptParent(mozilla::jsipc::PJavaScriptParent*) override;
 
@@ -756,6 +755,8 @@ private:
                                                      const bool& aHidden) override;
     virtual bool RecvGetSystemMemory(const uint64_t& getterId) override;
 
+    virtual bool RecvGetLookAndFeelCache(nsTArray<LookAndFeelInt>&& aLookAndFeelIntCache) override;
+
     virtual bool RecvDataStoreGetStores(
                        const nsString& aName,
                        const nsString& aOwner,

dom/ipc/PContent.ipdl

@@ -87,6 +87,7 @@ using mozilla::hal::ProcessPriority from "mozilla/HalTypes.h";
 using gfxIntSize from "nsSize.h";
 using mozilla::dom::TabId from "mozilla/dom/ipc/IdType.h";
 using mozilla::dom::ContentParentId from "mozilla/dom/ipc/IdType.h";
+using struct LookAndFeelInt from "mozilla/widget/WidgetMessageUtils.h";
 
 union ChromeRegistryItem
 {
@@ -690,6 +691,8 @@ parent:
     sync IsSecureURI(uint32_t type, URIParams uri, uint32_t flags)
         returns (bool isSecureURI);
 
+    sync GetLookAndFeelCache(LookAndFeelInt[] lookAndFeelIntCache);
+
     PHal();
 
     PIcc(uint32_t serviceId);

widget/LookAndFeel.h

@@ -15,6 +15,12 @@
 
 struct gfxFontStyle;
 
+struct LookAndFeelInt
+{
+  int32_t id;
+  int32_t value;
+};
+
 namespace mozilla {
 
 class LookAndFeel
@@ -583,6 +589,13 @@ public:
    * cached data would be released.
    */
   static void Refresh();
+
+  /**
+   * If the implementation is caching values, these accessors allow the
+   * cache to be exported and imported.
+   */
+  static nsTArray<LookAndFeelInt> GetIntCache();
+  static void SetIntCache(const nsTArray<LookAndFeelInt>& aLookAndFeelIntCache);
 };
 
 } // namespace mozilla

widget/WidgetMessageUtils.h

@@ -0,0 +1,39 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_WidgetMessageUtils_h
+#define mozilla_WidgetMessageUtils_h
+
+#include "ipc/IPCMessageUtils.h"
+#include "mozilla/LookAndFeel.h"
+
+namespace IPC {
+
+template<>
+struct ParamTraits<LookAndFeelInt>
+{
+  typedef LookAndFeelInt paramType;
+
+  static void Write(Message* aMsg, const paramType& aParam)
+  {
+    WriteParam(aMsg, aParam.id);
+    WriteParam(aMsg, aParam.value);
+  }
+
+  static bool Read(const Message* aMsg, void** aIter, paramType* aResult)
+  {
+    int32_t id, value;
+    if (ReadParam(aMsg, aIter, &id) &&
+        ReadParam(aMsg, aIter, &value)) {
+      aResult->id = id;
+      aResult->value = value;
+      return true;
+    }
+    return false;
+  }
+};
+
+} // namespace IPC
+
+#endif // WidgetMessageUtils_h

widget/moz.build

@@ -133,6 +133,7 @@ EXPORTS.mozilla += [
 
 EXPORTS.mozilla.widget += [
     'PuppetBidiKeyboard.h',
+    'WidgetMessageUtils.h',
 ]
 
 UNIFIED_SOURCES += [

widget/nsXPLookAndFeel.cpp

@@ -13,6 +13,7 @@
 #include "nsFont.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/gfx/2D.h"
+#include "mozilla/widget/WidgetMessageUtils.h"
 
 #include "gfxPlatform.h"
 #include "qcms.h"
@@ -453,6 +454,15 @@ nsXPLookAndFeel::Init()
   if (NS_SUCCEEDED(Preferences::GetBool("ui.use_native_colors", &val))) {
     sUseNativeColors = val;
   }
+
+  if (XRE_GetProcessType() == GeckoProcessType_Content) {
+    mozilla::dom::ContentChild* cc =
+      mozilla::dom::ContentChild::GetSingleton();
+
+    nsTArray<LookAndFeelInt> lookAndFeelIntCache;
+    cc->SendGetLookAndFeelCache(lookAndFeelIntCache);
+    LookAndFeel::SetIntCache(lookAndFeelIntCache);
+  }
 }
 
 nsXPLookAndFeel::~nsXPLookAndFeel()
@@ -703,6 +713,12 @@ nsXPLookAndFeel::RefreshImpl()
     sCachedColorBits[i] = 0;
 }
 
+nsTArray<LookAndFeelInt>
+nsXPLookAndFeel::GetIntCacheImpl()
+{
+  return nsTArray<LookAndFeelInt>();
+}
+
 namespace mozilla {
 
 // static
@@ -763,4 +779,18 @@ LookAndFeel::Refresh()
   nsLookAndFeel::GetInstance()->RefreshImpl();
 }
 
+// static
+nsTArray<LookAndFeelInt>
+LookAndFeel::GetIntCache()
+{
+  return nsLookAndFeel::GetInstance()->GetIntCacheImpl();
+}
+
+// static
+void
+LookAndFeel::SetIntCache(const nsTArray<LookAndFeelInt>& aLookAndFeelIntCache)
+{
+  return nsLookAndFeel::GetInstance()->SetIntCacheImpl(aLookAndFeelIntCache);
+}
+
 } // namespace mozilla

widget/nsXPLookAndFeel.h

@@ -7,6 +7,7 @@
 #define __nsXPLookAndFeel
 
 #include "mozilla/LookAndFeel.h"
+#include "nsTArray.h"
 
 class nsLookAndFeel;
 
@@ -79,6 +80,9 @@ public:
     return 600;
   }
 
+  virtual nsTArray<LookAndFeelInt> GetIntCacheImpl();
+  virtual void SetIntCacheImpl(const nsTArray<LookAndFeelInt>& aLookAndFeelIntCache) {}
+
 protected:
   nsXPLookAndFeel();