blob: 4776eedf160b5169b657aed37de9a0d7a4850144 [file] [log] [blame]
/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_CANVAS_TEXT_METRICS_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_CANVAS_TEXT_METRICS_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/html/canvas/baselines.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/fonts/font.h"
#include "third_party/blink/renderer/platform/graphics/graphics_types.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
class CORE_EXPORT TextMetrics final : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
static TextMetrics* Create() { return MakeGarbageCollected<TextMetrics>(); }
static TextMetrics* Create(const Font& font,
const TextDirection& direction,
const TextBaseline& baseline,
const TextAlign& align,
const String& text) {
TextMetrics* metric = MakeGarbageCollected<TextMetrics>();
metric->Update(font, direction, baseline, align, text);
return metric;
}
TextMetrics();
double width() const { return width_; }
const Vector<double>& advances() const { return advances_; }
double actualBoundingBoxLeft() const { return actual_bounding_box_left_; }
double actualBoundingBoxRight() const { return actual_bounding_box_right_; }
double fontBoundingBoxAscent() const { return font_bounding_box_ascent_; }
double fontBoundingBoxDescent() const { return font_bounding_box_descent_; }
double actualBoundingBoxAscent() const { return actual_bounding_box_ascent_; }
double actualBoundingBoxDescent() const {
return actual_bounding_box_descent_;
}
double emHeightAscent() const { return em_height_ascent_; }
double emHeightDescent() const { return em_height_descent_; }
Baselines* getBaselines() const { return baselines_; }
static float GetFontBaseline(const TextBaseline&, const SimpleFontData&);
void Trace(Visitor*) override;
private:
void Update(const Font&,
const TextDirection&,
const TextBaseline&,
const TextAlign&,
const String&);
// x-direction
double width_ = 0.0;
Vector<double> advances_;
double actual_bounding_box_left_ = 0.0;
double actual_bounding_box_right_ = 0.0;
// y-direction
double font_bounding_box_ascent_ = 0.0;
double font_bounding_box_descent_ = 0.0;
double actual_bounding_box_ascent_ = 0.0;
double actual_bounding_box_descent_ = 0.0;
double em_height_ascent_ = 0.0;
double em_height_descent_ = 0.0;
Member<Baselines> baselines_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_CANVAS_TEXT_METRICS_H_