Convert ManifestManager IPCs to Mojo.

content/public/common/manifest_struct_traits.cc

+// Copyright 2016 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 "content/public/common/manifest_struct_traits.h"
+
+namespace mojo {
+namespace {
+
+bool ValidateColor(int64_t color) {
+  if (color < std::numeric_limits<int32_t>::min() &&
+      color > std::numeric_limits<int32_t>::max() &&
+      color != content::Manifest::kInvalidOrMissingColor) {
+    return false;
+  }
+  return true;
+}
+
+// A wrapper around base::NullableString16 so a custom StringTraits
+// specialization can enforce maximum string length.
+struct TruncatedNullableString16 {
+  base::NullableString16 string;
+};
+
+}  // namespace
+
+template <>
+struct StringTraits<TruncatedNullableString16> {
+  static void SetToNull(TruncatedNullableString16* output) {
+    output->string = base::NullableString16();
+  }
+
+  static bool Read(StringDataView input, TruncatedNullableString16* output) {
+    if (!StringTraits<base::NullableString16>::Read(input, &output->string))
+      return false;
+
+    return (output->string.is_null() ||
+            output->string.string().size() <=
+                content::Manifest::kMaxIPCStringLength);
+  }
+};
+
+bool StructTraits<blink::mojom::Manifest, content::Manifest>::Read(
+    blink::mojom::ManifestDataView data,
+    content::Manifest* out) {
+  TruncatedNullableString16 string;
+  if (!data.ReadName(&string))
+    return false;
+  out->name = string.string;
+
+  if (!data.ReadShortName(&string))
+    return false;
+  out->short_name = string.string;
+
+  if (!data.ReadGcmSenderId(&string))
+    return false;
+  out->gcm_sender_id = string.string;
+
+  if (!data.ReadStartUrl(&out->start_url))
+    return false;
+
+  if (!data.ReadIcons(&out->icons))
+    return false;
+
+  if (!data.ReadRelatedApplications(&out->related_applications))
+    return false;
+
+  out->prefer_related_applications = data.prefer_related_applications();
+  out->theme_color = data.theme_color();
+  if (!ValidateColor(out->theme_color))
+    return false;
+
+  out->background_color = data.background_color();
+  if (!ValidateColor(out->background_color))
+    return false;
+
+  out->display = static_cast<blink::WebDisplayMode>(data.display());
+  out->orientation =
+      static_cast<blink::WebScreenOrientationLockType>(data.orientation());
+
+  return true;
+}
+
+bool StructTraits<blink::mojom::ManifestIcon, content::Manifest::Icon>::Read(
+    blink::mojom::ManifestIconDataView data,
+    content::Manifest::Icon* out) {
+  if (!data.ReadSrc(&out->src))
+    return false;
+
+  TruncatedNullableString16 string;
+  if (!data.ReadType(&string))
+    return false;
+
+  out->type = string.string;
+
+  if (!data.ReadSizes(&out->sizes))
+    return false;
+
+  return true;
+}
+
+bool StructTraits<blink::mojom::RelatedApplication,
+                  content::Manifest::RelatedApplication>::
+    Read(blink::mojom::RelatedApplicationDataView data,
+         content::Manifest::RelatedApplication* out) {
+  TruncatedNullableString16 string;
+  if (!data.ReadPlatform(&string))
+    return false;
+  out->platform = string.string;
+
+  if (!data.ReadUrl(&out->url))
+    return false;
+
+  if (!data.ReadId(&string))
+    return false;
+  out->id = string.string;
+
+  return true;
+}
+
+}  // namespace mojo