blink: permissions: add plumbing to request permissions

Source/modules/permissions/Permissions.cpp

 // Copyright 2014 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 "config.h"
 #include "modules/permissions/Permissions.h"
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/modules/v8/V8MidiPermissionDescriptor.h"
@@ skipping 90 matching lines @@
         return promise;
 
     // If the current origin is a file scheme, it will unlikely return a
     // meaningful value because most APIs are broken on file scheme and no
     // permission prompt will be shown even if the returned permission will most
     // likely be "prompt".
     client->queryPermission(type, KURL(KURL(), scriptState->executionContext()->securityOrigin()->toString()), new PermissionCallback(resolver, type));
     return promise;
 }
 
+ScriptPromise Permissions::request(ScriptState* scriptState, const ScriptValue& rawPermission)
+{
+    WebPermissionClient* client = getClient(scriptState->executionContext());
+    if (!client)
+        return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(InvalidStateError, "In its current state, the global scope can't request permissions."));
+
+    TrackExceptionState exceptionState;
+    PermissionDescriptor permission = NativeValueTraits<PermissionDescriptor>::nativeValue(scriptState->isolate(), rawPermission.v8Value(), exceptionState);
+
+    if (exceptionState.hadException())
+        return ScriptPromise::reject(scriptState, v8::Exception::TypeError(v8String(scriptState->isolate(), exceptionState.message())));
+
+    RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+
+    String name = permission.name();
+    WebPermissionType type = convertPermissionStringToType(name);
+
+    if (handleDefaultBehaviour(scriptState, rawPermission, resolver, type, exceptionState))
+        return promise;
+
+    client->requestPermission(type, KURL(KURL(), scriptState->executionContext()->securityOrigin()->toString()), new PermissionCallback(resolver, type));
+    return promise;
+}
+
 ScriptPromise Permissions::revoke(ScriptState* scriptState, const ScriptValue& rawPermission)
 {
     WebPermissionClient* client = getClient(scriptState->executionContext());
     if (!client)
         return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(InvalidStateError, "In its current state, the global scope can't revoke permissions."));
 
     TrackExceptionState exceptionState;
     PermissionDescriptor permission = NativeValueTraits<PermissionDescriptor>::nativeValue(scriptState->isolate(), rawPermission.v8Value(), exceptionState);
 
     if (exceptionState.hadException())
         return ScriptPromise::reject(scriptState, v8::Exception::TypeError(v8String(scriptState->isolate(), exceptionState.message())));
 
     RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
 
     String name = permission.name();
     WebPermissionType type = convertPermissionStringToType(name);
 
     if (handleDefaultBehaviour(scriptState, rawPermission, resolver, type, exceptionState))
         return promise;
 
     client->revokePermission(type, KURL(KURL(), scriptState->executionContext()->securityOrigin()->toString()), new PermissionCallback(resolver, type));
     return promise;
 }
 
 } // namespace blink