iced_core/renderer/
null.rs

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1use crate::alignment;
2use crate::image::{self, Image};
3use crate::renderer::{self, Renderer};
4use crate::svg;
5use crate::text::{self, Text};
6use crate::{
7    Background, Color, Font, Pixels, Point, Rectangle, Size, Transformation,
8};
9
10impl Renderer for () {
11    fn start_layer(&mut self, _bounds: Rectangle) {}
12
13    fn end_layer(&mut self) {}
14
15    fn start_transformation(&mut self, _transformation: Transformation) {}
16
17    fn end_transformation(&mut self) {}
18
19    fn clear(&mut self) {}
20
21    fn fill_quad(
22        &mut self,
23        _quad: renderer::Quad,
24        _background: impl Into<Background>,
25    ) {
26    }
27}
28
29impl text::Renderer for () {
30    type Font = Font;
31    type Paragraph = ();
32    type Editor = ();
33
34    const MONOSPACE_FONT: Font = Font::MONOSPACE;
35    const ICON_FONT: Font = Font::DEFAULT;
36    const CHECKMARK_ICON: char = '0';
37    const ARROW_DOWN_ICON: char = '0';
38
39    fn default_font(&self) -> Self::Font {
40        Font::default()
41    }
42
43    fn default_size(&self) -> Pixels {
44        Pixels(16.0)
45    }
46
47    fn fill_paragraph(
48        &mut self,
49        _paragraph: &Self::Paragraph,
50        _position: Point,
51        _color: Color,
52        _clip_bounds: Rectangle,
53    ) {
54    }
55
56    fn fill_editor(
57        &mut self,
58        _editor: &Self::Editor,
59        _position: Point,
60        _color: Color,
61        _clip_bounds: Rectangle,
62    ) {
63    }
64
65    fn fill_text(
66        &mut self,
67        _paragraph: Text,
68        _position: Point,
69        _color: Color,
70        _clip_bounds: Rectangle,
71    ) {
72    }
73}
74
75impl text::Paragraph for () {
76    type Font = Font;
77
78    fn with_text(_text: Text<&str>) -> Self {}
79
80    fn with_spans<Link>(
81        _text: Text<&[text::Span<'_, Link, Self::Font>], Self::Font>,
82    ) -> Self {
83    }
84
85    fn resize(&mut self, _new_bounds: Size) {}
86
87    fn compare(&self, _text: Text<()>) -> text::Difference {
88        text::Difference::None
89    }
90
91    fn size(&self) -> Pixels {
92        Pixels(16.0)
93    }
94
95    fn font(&self) -> Font {
96        Font::DEFAULT
97    }
98
99    fn line_height(&self) -> text::LineHeight {
100        text::LineHeight::default()
101    }
102
103    fn align_x(&self) -> text::Alignment {
104        text::Alignment::Default
105    }
106
107    fn align_y(&self) -> alignment::Vertical {
108        alignment::Vertical::Top
109    }
110
111    fn wrapping(&self) -> text::Wrapping {
112        text::Wrapping::default()
113    }
114
115    fn shaping(&self) -> text::Shaping {
116        text::Shaping::default()
117    }
118
119    fn grapheme_position(&self, _line: usize, _index: usize) -> Option<Point> {
120        None
121    }
122
123    fn bounds(&self) -> Size {
124        Size::ZERO
125    }
126
127    fn min_bounds(&self) -> Size {
128        Size::ZERO
129    }
130
131    fn hit_test(&self, _point: Point) -> Option<text::Hit> {
132        None
133    }
134
135    fn hit_span(&self, _point: Point) -> Option<usize> {
136        None
137    }
138
139    fn span_bounds(&self, _index: usize) -> Vec<Rectangle> {
140        vec![]
141    }
142}
143
144impl text::Editor for () {
145    type Font = Font;
146
147    fn with_text(_text: &str) -> Self {}
148
149    fn is_empty(&self) -> bool {
150        true
151    }
152
153    fn cursor(&self) -> text::editor::Cursor {
154        text::editor::Cursor::Caret(Point::ORIGIN)
155    }
156
157    fn cursor_position(&self) -> (usize, usize) {
158        (0, 0)
159    }
160
161    fn selection(&self) -> Option<String> {
162        None
163    }
164
165    fn line(&self, _index: usize) -> Option<text::editor::Line<'_>> {
166        None
167    }
168
169    fn line_count(&self) -> usize {
170        0
171    }
172
173    fn perform(&mut self, _action: text::editor::Action) {}
174
175    fn bounds(&self) -> Size {
176        Size::ZERO
177    }
178
179    fn min_bounds(&self) -> Size {
180        Size::ZERO
181    }
182
183    fn update(
184        &mut self,
185        _new_bounds: Size,
186        _new_font: Self::Font,
187        _new_size: Pixels,
188        _new_line_height: text::LineHeight,
189        _new_wrapping: text::Wrapping,
190        _new_highlighter: &mut impl text::Highlighter,
191    ) {
192    }
193
194    fn highlight<H: text::Highlighter>(
195        &mut self,
196        _font: Self::Font,
197        _highlighter: &mut H,
198        _format_highlight: impl Fn(
199            &H::Highlight,
200        ) -> text::highlighter::Format<Self::Font>,
201    ) {
202    }
203}
204
205impl image::Renderer for () {
206    type Handle = image::Handle;
207
208    fn measure_image(&self, _handle: &Self::Handle) -> Size<u32> {
209        Size::default()
210    }
211
212    fn draw_image(&mut self, _image: Image, _bounds: Rectangle) {}
213}
214
215impl svg::Renderer for () {
216    fn measure_svg(&self, _handle: &svg::Handle) -> Size<u32> {
217        Size::default()
218    }
219
220    fn draw_svg(&mut self, _svg: svg::Svg, _bounds: Rectangle) {}
221}
iced_core/renderer/null.rs

iced_core/renderer/
null.rs
