1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/*
* Copyright (C) 2008-2017 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.
*/
#pragma once
#include "ThemeTypes.h"
#include <optional>
#include <wtf/Forward.h>
namespace WebCore {
class Color;
class ControlStates;
class FloatRect;
class FloatSize;
class FontCascade;
class FontCascadeDescription;
class GraphicsContext;
class LengthBox;
class ScrollView;
struct LengthSize;
class Theme {
public:
static Theme& singleton();
// A function to obtain the baseline position adjustment for a "leaf" control. This will be used if a baseline
// position cannot be determined by examining child content. Checkboxes and radio buttons are examples of
// controls that need to do this. The adjustment is an offset that adds to the baseline, e.g., marginTop() + height() + |offset|.
// The offset is not zoomed.
virtual int baselinePositionAdjustment(StyleAppearance) const;
// The font description result should have a zoomed font size.
virtual std::optional<FontCascadeDescription> controlFont(StyleAppearance, const FontCascade&, float zoomFactor) const;
// The size here is in zoomed coordinates already. If a new size is returned, it also needs to be in zoomed coordinates.
virtual LengthSize controlSize(StyleAppearance, const FontCascade&, const LengthSize& zoomedSize, float zoomFactor) const;
// Returns the minimum size for a control in zoomed coordinates.
LengthSize minimumControlSize(StyleAppearance, const FontCascade&, const LengthSize& zoomedSize, const LengthSize& nonShrinkableZoomedSize, float zoomFactor) const;
// Allows the theme to modify the existing padding/border.
virtual LengthBox controlPadding(StyleAppearance, const FontCascade&, const LengthBox& zoomedBox, float zoomFactor) const;
virtual LengthBox controlBorder(StyleAppearance, const FontCascade&, const LengthBox& zoomedBox, float zoomFactor) const;
// Whether or not whitespace: pre should be forced on always.
virtual bool controlRequiresPreWhiteSpace(StyleAppearance) const;
// Method for painting a control. The rect is in zoomed coordinates.
// FIXME: <https://webkit.org/b/231637> Move parameters to a struct.
virtual void paint(StyleAppearance, ControlStates&, GraphicsContext&, const FloatRect& zoomedRect, float zoomFactor, ScrollView*, float deviceScaleFactor, float pageScaleFactor, bool useSystemAppearance, bool useDarkAppearance, const Color& tintColor);
// Some controls may spill out of their containers (e.g., the check on an OS X checkbox). When these controls repaint,
// the theme needs to communicate this inflated rect to the engine so that it can invalidate the whole control.
// The rect passed in is in zoomed coordinates, so the inflation should take that into account and make sure the inflation
// amount is also scaled by the zoomFactor.
virtual void inflateControlPaintRect(StyleAppearance, const ControlStates&, FloatRect& zoomedRect, float zoomFactor) const;
virtual void drawNamedImage(const String&, GraphicsContext&, const FloatSize&) const;
virtual bool userPrefersContrast() const;
virtual bool userPrefersReducedMotion() const;
protected:
Theme() = default;
virtual ~Theme() = default;
virtual LengthSize minimumControlSize(StyleAppearance, const FontCascade&, const LengthSize& zoomedSize, float zoomFactor) const;
private:
Theme(const Theme&) = delete;
void operator=(const Theme&) = delete;
};
} // namespace WebCore
|
