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// Copyright 2013 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.
#ifndef UI_GFX_LINUX_FONT_DELEGATE_H_
#define UI_GFX_LINUX_FONT_DELEGATE_H_
#include <string>
#include "base/memory/scoped_ptr.h"
#include "ui/gfx/font_render_params.h"
#include "ui/gfx/gfx_export.h"
namespace gfx {
class ScopedPangoFontDescription;
// Allows a Linux platform-specific overriding of font preferences.
class GFX_EXPORT LinuxFontDelegate {
public:
virtual ~LinuxFontDelegate() {}
// Sets the dynamically loaded singleton that provides font preferences.
// This pointer is not owned, and if this method is called a second time,
// the first instance is not deleted.
static void SetInstance(LinuxFontDelegate* instance);
// Returns a LinuxFontDelegate instance for the toolkit used in
// the user's desktop environment.
//
// Can return NULL, in case no toolkit has been set. (For example, if we're
// running with the "--ash" flag.)
static const LinuxFontDelegate* instance();
// Returns the default font rendering settings.
virtual FontRenderParams GetDefaultFontRenderParams() const = 0;
// Returns the Pango description for the default UI font.
virtual scoped_ptr<ScopedPangoFontDescription>
GetDefaultPangoFontDescription() const = 0;
// Returns the resolution (as pixels-per-inch) that should be used to convert
// font sizes between points and pixels. -1 is returned if the DPI is unset.
virtual double GetFontDPI() const = 0;
};
} // namespace gfx
#endif // UI_GFX_LINUX_FONT_DELEGATE_H_
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