Add m-esr52 at 52.6.0

1 files changed, 324 insertions, 0 deletions

diff --git a/widget/android/PrefsHelper.h b/widget/android/PrefsHelper.h
new file mode 100644
index 000000000..b053c979a
--- /dev/null
+++ b/widget/android/PrefsHelper.h
@@ -0,0 +1,324 @@
+/* -*- Mode: c++; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
+ * 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 PrefsHelper_h
+#define PrefsHelper_h
+
+#include "GeneratedJNINatives.h"
+#include "MainThreadUtils.h"
+#include "nsAppShell.h"
+#include "nsCOMPtr.h"
+#include "nsVariant.h"
+
+#include "mozilla/Preferences.h"
+#include "mozilla/Services.h"
+
+namespace mozilla {
+
+class PrefsHelper
+    : public java::PrefsHelper::Natives<PrefsHelper>
+{
+    PrefsHelper() = delete;
+
+    static bool GetVariantPref(nsIObserverService* aObsServ,
+                               nsIWritableVariant* aVariant,
+                               jni::Object::Param aPrefHandler,
+                               const jni::String::LocalRef& aPrefName)
+    {
+        if (NS_FAILED(aObsServ->NotifyObservers(aVariant, "android-get-pref",
+                                                aPrefName->ToString().get()))) {
+            return false;
+        }
+
+        uint16_t varType = nsIDataType::VTYPE_EMPTY;
+        if (NS_FAILED(aVariant->GetDataType(&varType))) {
+            return false;
+        }
+
+        int32_t type = java::PrefsHelper::PREF_INVALID;
+        bool boolVal = false;
+        int32_t intVal = 0;
+        nsAutoString strVal;
+
+        switch (varType) {
+            case nsIDataType::VTYPE_BOOL:
+                type = java::PrefsHelper::PREF_BOOL;
+                if (NS_FAILED(aVariant->GetAsBool(&boolVal))) {
+                    return false;
+                }
+                break;
+            case nsIDataType::VTYPE_INT32:
+                type = java::PrefsHelper::PREF_INT;
+                if (NS_FAILED(aVariant->GetAsInt32(&intVal))) {
+                    return false;
+                }
+                break;
+            case nsIDataType::VTYPE_ASTRING:
+                type = java::PrefsHelper::PREF_STRING;
+                if (NS_FAILED(aVariant->GetAsAString(strVal))) {
+                    return false;
+                }
+                break;
+            default:
+                return false;
+        }
+
+        jni::StringParam jstrVal(type == java::PrefsHelper::PREF_STRING ?
+                jni::StringParam(strVal, aPrefName.Env()) :
+                jni::StringParam(nullptr));
+
+        if (aPrefHandler) {
+            java::PrefsHelper::CallPrefHandler(
+                    aPrefHandler, type, aPrefName,
+                    boolVal, intVal, jstrVal);
+        } else {
+            java::PrefsHelper::OnPrefChange(
+                    aPrefName, type, boolVal, intVal, jstrVal);
+        }
+        return true;
+    }
+
+    static bool SetVariantPref(nsIObserverService* aObsServ,
+                               nsIWritableVariant* aVariant,
+                               jni::String::Param aPrefName,
+                               bool aFlush,
+                               int32_t aType,
+                               bool aBoolVal,
+                               int32_t aIntVal,
+                               jni::String::Param aStrVal)
+    {
+        nsresult rv = NS_ERROR_FAILURE;
+
+        switch (aType) {
+            case java::PrefsHelper::PREF_BOOL:
+                rv = aVariant->SetAsBool(aBoolVal);
+                break;
+            case java::PrefsHelper::PREF_INT:
+                rv = aVariant->SetAsInt32(aIntVal);
+                break;
+            case java::PrefsHelper::PREF_STRING:
+                rv = aVariant->SetAsAString(aStrVal->ToString());
+                break;
+        }
+
+        if (NS_SUCCEEDED(rv)) {
+            rv = aObsServ->NotifyObservers(aVariant, "android-set-pref",
+                                           aPrefName->ToString().get());
+        }
+
+        uint16_t varType = nsIDataType::VTYPE_EMPTY;
+        if (NS_SUCCEEDED(rv)) {
+            rv = aVariant->GetDataType(&varType);
+        }
+
+        // We use set-to-empty to signal the pref was handled.
+        const bool handled = varType == nsIDataType::VTYPE_EMPTY;
+
+        if (NS_SUCCEEDED(rv) && handled && aFlush) {
+            rv = Preferences::GetService()->SavePrefFile(nullptr);
+        }
+
+        if (NS_SUCCEEDED(rv)) {
+            return handled;
+        }
+
+        NS_WARNING(nsPrintfCString("Failed to set pref %s",
+                                   aPrefName->ToCString().get()).get());
+        // Pretend we handled the pref.
+        return true;
+    }
+
+public:
+    static void GetPrefs(const jni::Class::LocalRef& aCls,
+                         jni::ObjectArray::Param aPrefNames,
+                         jni::Object::Param aPrefHandler)
+    {
+        nsTArray<jni::Object::LocalRef> nameRefArray(aPrefNames->GetElements());
+        nsCOMPtr<nsIObserverService> obsServ;
+        nsCOMPtr<nsIWritableVariant> value;
+        nsAdoptingString strVal;
+
+        for (jni::Object::LocalRef& nameRef : nameRefArray) {
+            jni::String::LocalRef nameStr(mozilla::Move(nameRef));
+            const nsCString& name = nameStr->ToCString();
+
+            int32_t type = java::PrefsHelper::PREF_INVALID;
+            bool boolVal = false;
+            int32_t intVal = 0;
+
+            switch (Preferences::GetType(name.get())) {
+                case nsIPrefBranch::PREF_BOOL:
+                    type = java::PrefsHelper::PREF_BOOL;
+                    boolVal = Preferences::GetBool(name.get());
+                    break;
+
+                case nsIPrefBranch::PREF_INT:
+                    type = java::PrefsHelper::PREF_INT;
+                    intVal = Preferences::GetInt(name.get());
+                    break;
+
+                case nsIPrefBranch::PREF_STRING:
+                    type = java::PrefsHelper::PREF_STRING;
+                    strVal = Preferences::GetLocalizedString(name.get());
+                    if (!strVal) {
+                        strVal = Preferences::GetString(name.get());
+                    }
+                    break;
+
+                default:
+                    // Pref not found; try to find it.
+                    if (!obsServ) {
+                        obsServ = services::GetObserverService();
+                        if (!obsServ) {
+                            continue;
+                        }
+                    }
+                    if (value) {
+                        value->SetAsEmpty();
+                    } else {
+                        value = new nsVariant();
+                    }
+                    if (!GetVariantPref(obsServ, value,
+                                        aPrefHandler, nameStr)) {
+                        NS_WARNING(nsPrintfCString("Failed to get pref %s",
+                                                   name.get()).get());
+                    }
+                    continue;
+            }
+
+            java::PrefsHelper::CallPrefHandler(
+                    aPrefHandler, type, nameStr, boolVal, intVal,
+                    jni::StringParam(type == java::PrefsHelper::PREF_STRING ?
+                        jni::StringParam(strVal, aCls.Env()) :
+                        jni::StringParam(nullptr)));
+        }
+
+        java::PrefsHelper::CallPrefHandler(
+                aPrefHandler, java::PrefsHelper::PREF_FINISH,
+                nullptr, false, 0, nullptr);
+    }
+
+    static void SetPref(jni::String::Param aPrefName,
+                        bool aFlush,
+                        int32_t aType,
+                        bool aBoolVal,
+                        int32_t aIntVal,
+                        jni::String::Param aStrVal)
+    {
+        const nsCString& name = aPrefName->ToCString();
+
+        if (Preferences::GetType(name.get()) == nsIPrefBranch::PREF_INVALID) {
+            // No pref; try asking first.
+            nsCOMPtr<nsIObserverService> obsServ =
+                    services::GetObserverService();
+            nsCOMPtr<nsIWritableVariant> value = new nsVariant();
+            if (obsServ && SetVariantPref(obsServ, value, aPrefName, aFlush,
+                                          aType, aBoolVal, aIntVal, aStrVal)) {
+                // The "pref" has changed; send a notification.
+                GetVariantPref(obsServ, value, nullptr,
+                               jni::String::LocalRef(aPrefName));
+                return;
+            }
+        }
+
+        switch (aType) {
+            case java::PrefsHelper::PREF_BOOL:
+                Preferences::SetBool(name.get(), aBoolVal);
+                break;
+            case java::PrefsHelper::PREF_INT:
+                Preferences::SetInt(name.get(), aIntVal);
+                break;
+            case java::PrefsHelper::PREF_STRING:
+                Preferences::SetString(name.get(), aStrVal->ToString());
+                break;
+            default:
+                MOZ_ASSERT(false, "Invalid pref type");
+        }
+
+        if (aFlush) {
+            Preferences::GetService()->SavePrefFile(nullptr);
+        }
+    }
+
+    static void AddObserver(const jni::Class::LocalRef& aCls,
+                            jni::ObjectArray::Param aPrefNames,
+                            jni::Object::Param aPrefHandler,
+                            jni::ObjectArray::Param aPrefsToObserve)
+    {
+        // Call observer immediately with existing pref values.
+        GetPrefs(aCls, aPrefNames, aPrefHandler);
+
+        if (!aPrefsToObserve) {
+            return;
+        }
+
+        nsTArray<jni::Object::LocalRef> nameRefArray(
+                aPrefsToObserve->GetElements());
+        nsAppShell* const appShell = nsAppShell::Get();
+        MOZ_ASSERT(appShell);
+
+        for (jni::Object::LocalRef& nameRef : nameRefArray) {
+            jni::String::LocalRef nameStr(mozilla::Move(nameRef));
+            MOZ_ALWAYS_SUCCEEDS(Preferences::AddStrongObserver(
+                    appShell, nameStr->ToCString().get()));
+        }
+    }
+
+    static void RemoveObserver(const jni::Class::LocalRef& aCls,
+                               jni::ObjectArray::Param aPrefsToUnobserve)
+    {
+        nsTArray<jni::Object::LocalRef> nameRefArray(
+                aPrefsToUnobserve->GetElements());
+        nsAppShell* const appShell = nsAppShell::Get();
+        MOZ_ASSERT(appShell);
+
+        for (jni::Object::LocalRef& nameRef : nameRefArray) {
+            jni::String::LocalRef nameStr(mozilla::Move(nameRef));
+            MOZ_ALWAYS_SUCCEEDS(Preferences::RemoveObserver(
+                    appShell, nameStr->ToCString().get()));
+        }
+    }
+
+    static void OnPrefChange(const char16_t* aData)
+    {
+        const nsCString& name = NS_LossyConvertUTF16toASCII(aData);
+
+        int32_t type = -1;
+        bool boolVal = false;
+        int32_t intVal = false;
+        nsAdoptingString strVal;
+
+        switch (Preferences::GetType(name.get())) {
+            case nsIPrefBranch::PREF_BOOL:
+                type = java::PrefsHelper::PREF_BOOL;
+                boolVal = Preferences::GetBool(name.get());
+                break;
+            case nsIPrefBranch::PREF_INT:
+                type = java::PrefsHelper::PREF_INT;
+                intVal = Preferences::GetInt(name.get());
+                break;
+            case nsIPrefBranch::PREF_STRING:
+                type = java::PrefsHelper::PREF_STRING;
+                strVal = Preferences::GetLocalizedString(name.get());
+                if (!strVal) {
+                    strVal = Preferences::GetString(name.get());
+                }
+                break;
+            default:
+                NS_WARNING(nsPrintfCString("Invalid pref %s",
+                                           name.get()).get());
+                return;
+        }
+
+        java::PrefsHelper::OnPrefChange(
+                name, type, boolVal, intVal,
+                jni::StringParam(type == java::PrefsHelper::PREF_STRING ?
+                    jni::StringParam(strVal) : jni::StringParam(nullptr)));
+    }
+};
+
+} // namespace
+
+#endif // PrefsHelper_h