1/*
2 * Copyright (C) 2014 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "FontCascade.h"
29#include "RenderStyleConstants.h"
30
31namespace WebCore {
32
33class InlineTextBox;
34class RenderStyle;
35class TextUnderlineOffset;
36
37inline float wavyOffsetFromDecoration()
38{
39 return 1;
40}
41
42struct WavyStrokeParameters {
43 // Distance between decoration's axis and Bezier curve's control points.
44 // The height of the curve is based on this distance. Increases the curve's height
45 // as fontSize increases to make the curve look better.
46 float controlPointDistance { 0 };
47
48 // Increment used to form the diamond shape between start point (p1), control
49 // points and end point (p2) along the axis of the decoration. The curve gets
50 // wider as font size increases.
51 float step { 0 };
52};
53WavyStrokeParameters getWavyStrokeParameters(float fontSize);
54GlyphOverflow visualOverflowForDecorations(const RenderStyle& lineStyle, const InlineTextBox*);
55float computeUnderlineOffset(TextUnderlinePosition, TextUnderlineOffset, const FontMetrics&, const InlineTextBox*, float textDecorationThickness);
56
57} // namespace WebCore
58