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// Copyright (c) 2012 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 <stdint.h>
#include "base/strings/string_piece.h"
#include "ui/base/resource/data_pack_export.h"
#include "ui/base/resource/scale_factor.h"
namespace base {
class RefCountedStaticMemory;
namespace ui {
class UI_DATA_PACK_EXPORT ResourceHandle {
// What type of encoding the text resources use.
enum TextEncodingType {
virtual ~ResourceHandle() {}
// Returns true if the DataPack contains a resource with id |resource_id|.
virtual bool HasResource(uint16_t resource_id) const = 0;
// Get resource by id |resource_id|, filling in |data|.
// The data is owned by the DataPack object and should not be modified.
// Returns false if the resource id isn't found.
virtual bool GetStringPiece(uint16_t resource_id,
base::StringPiece* data) const = 0;
// Like GetStringPiece(), but returns a reference to memory.
// Caller owns the returned object.
virtual base::RefCountedStaticMemory* GetStaticMemory(
uint16_t resource_id) const = 0;
// Get the encoding type of text resources.
virtual TextEncodingType GetTextEncodingType() const = 0;
// The scale of images in this resource pack relative to images in the 1x
// resource pak.
virtual ScaleFactor GetScaleFactor() const = 0;
} // namespace ui