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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.
#ifndef UI_GFX_PANGO_UTIL_H_
#define UI_GFX_PANGO_UTIL_H_
#include <cairo/cairo.h>
#include <pango/pango.h>
#include "base/i18n/rtl.h"
#include "base/logging.h"
#include "base/strings/string16.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/gfx_export.h"
namespace gfx {
class FontList;
// Utility class to ensure that PangoFontDescription is freed.
class ScopedPangoFontDescription {
public:
explicit ScopedPangoFontDescription(PangoFontDescription* description)
: description_(description) {
DCHECK(description);
}
explicit ScopedPangoFontDescription(const std::string& str)
: description_(pango_font_description_from_string(str.c_str())) {
DCHECK(description_);
}
~ScopedPangoFontDescription() {
pango_font_description_free(description_);
}
PangoFontDescription* get() { return description_; }
private:
PangoFontDescription* description_;
DISALLOW_COPY_AND_ASSIGN(ScopedPangoFontDescription);
};
// ----------------------------------------------------------------------------
// All other methods in this file are only to be used within the ui/ directory.
// They are shared with internal skia interfaces.
// ----------------------------------------------------------------------------
// Configures |layout| for the passed-in parameters.
void SetUpPangoLayout(
PangoLayout* layout,
const base::string16& text,
const FontList& font_list,
base::i18n::TextDirection text_direction,
int flags);
// Returns the size in pixels for the specified |pango_font|.
int GetPangoFontSizeInPixels(PangoFontDescription* pango_font);
// Retrieves the Pango metrics for a Pango font description. Caches the metrics
// and never frees them. The metrics objects are relatively small and very
// expensive to look up.
PangoFontMetrics* GetPangoFontMetrics(PangoFontDescription* desc);
} // namespace gfx
#endif // UI_GFX_PANGO_UTIL_H_
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