style_cascade.h
1 /*
2 ** ClanLib SDK
3 ** Copyright (c) 1997-2016 The ClanLib Team
4 **
5 ** This software is provided 'as-is', without any express or implied
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10 ** including commercial applications, and to alter it and redistribute it
11 ** freely, subject to the following restrictions:
12 **
13 ** 1. The origin of this software must not be misrepresented; you must not
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15 ** in a product, an acknowledgment in the product documentation would be
16 ** appreciated but is not required.
17 ** 2. Altered source versions must be plainly marked as such, and must not be
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19 ** 3. This notice may not be removed or altered from any source distribution.
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24 ** File Author(s):
25 **
26 ** Magnus Norddahl
27 */
28 
29 #pragma once
30 
31 #include <memory>
32 #include <string>
33 #include <vector>
34 #include "style_get_value.h"
35 
36 namespace clan
37 {
38  class Style;
39  class StyleGetValue;
40  class Canvas;
41  class Font;
42  class ViewGeometry;
43 
44 #if defined(MICROSOFT_FINALLY_IMPLEMENTED_CONSTEXPR_TEN_YEARS_AFTER_EVERYONE_ELSE)
45  class PropertyNameConst
47  {
48  public:
49  template<std::size_t Length>
50  constexpr PropertyNameConst(const char(&text)[Length]) : text(text), length(Length - 1) { }
51 
52  constexpr char operator[](std::size_t index) const { return index < length ? text[index] : throw std::out_of_range("PropertyNameConst operator[] out of bounds"); }
53  constexpr std::size_t size() const { return length; }
54  constexpr std::size_t hash() const { return hash(2166136261U, 0); }
55 
56  private:
57  constexpr std::size_t hash(std::size_t value, std::size_t index) const { return index == length ? value : hash((value ^ (std::size_t)text[index]) * 16777619U, index + 1); }
58 
59  const char * const text;
60  const std::size_t length;
61  };
62 #endif
63 
66  {
67  public:
69  StyleCascade(std::vector<Style *> cascade, const StyleCascade *parent = nullptr) : cascade(std::move(cascade)), parent(parent) { }
70 
72  std::vector<Style *> cascade;
73 
75  const StyleCascade *parent = nullptr;
76 
78  StyleGetValue cascade_value(const char *property_name) const;
79  StyleGetValue cascade_value(const std::string &property_name) const { return cascade_value(property_name.c_str()); }
80 
82  StyleGetValue specified_value(const char *property_name) const;
83  StyleGetValue specified_value(const std::string &property_name) const { return specified_value(property_name.c_str()); }
84 
88  StyleGetValue computed_value(const char *property_name) const;
89  StyleGetValue computed_value(const std::string &property_name) const { return computed_value(property_name.c_str()); }
90 
93 
96 
99 
102 
105 
107  int array_size(const char *property_name) const;
108  int array_size(const std::string &property_name) const { return array_size(property_name.c_str()); }
109 
111  void render_background(Canvas &canvas, const ViewGeometry &geometry) const;
112 
114  void render_border(Canvas &canvas, const ViewGeometry &geometry) const;
115 
117  Font font(Canvas &canvas) const;
118  };
119 }
StyleGetValue compute_length(const StyleGetValue &length) const
Convert length into px (device independent pixel) units.
value is an angle
Definition: clanapp.h:35
StyleGetValue compute_angle(const StyleGetValue &angle) const
Convert angle into radians.
StyleGetValue compute_resolution(const StyleGetValue &resolution) const
Convert resolution to dots per px unit (pixel ratio scale)
2D Graphics Canvas
Definition: canvas.h:71
Definition: view_geometry.h:38
StyleCascade(std::vector< Style * > cascade, const StyleCascade *parent=nullptr)
Definition: style_cascade.h:69
StyleCascade()
Definition: style_cascade.h:68
STL namespace.
StyleGetValue compute_time(const StyleGetValue &time) const
Convert time to seconds.
const StyleCascade * parent
Parent cascade used for inheritance.
Definition: style_cascade.h:75
std::vector< Style * > cascade
Property sets to be examined.
Definition: style_cascade.h:72
StyleGetValue specified_value(const char *property_name) const
Resolve any inheritance or initial values for the cascade value.
StyleGetValue cascade_value(const std::string &property_name) const
Definition: style_cascade.h:79
StyleGetValue compute_frequency(const StyleGetValue &frequency) const
Convert frequency to Hz.
int array_size(const std::string &property_name) const
Definition: style_cascade.h:108
int array_size(const char *property_name) const
Value array size for the property.
void render_border(Canvas &canvas, const ViewGeometry &geometry) const
Render styled border.
value is a keyword
Style value returned by style classes.
Definition: style_get_value.h:39
StyleGetValue specified_value(const std::string &property_name) const
Definition: style_cascade.h:83
StyleGetValue cascade_value(const char *property_name) const
Find the first declared value in the cascade for the specified property.
Font font(Canvas &canvas) const
Font used by this style cascade.
void render_background(Canvas &canvas, const ViewGeometry &geometry) const
Render styled background.
Font class.
Definition: font.h:59
Style value resolver.
Definition: style_cascade.h:65
Pointer left area.
StyleGetValue computed_value(const std::string &property_name) const
Definition: style_cascade.h:89
StyleGetValue computed_value(const char *property_name) const