iced_core/renderer/
null.rs

Help
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 ICON_FONT: Font = Font::DEFAULT;
35    const CHECKMARK_ICON: char = '0';
36    const ARROW_DOWN_ICON: char = '0';
37
38    fn default_font(&self) -> Self::Font {
39        Font::default()
40    }
41
42    fn default_size(&self) -> Pixels {
43        Pixels(16.0)
44    }
45
46    fn fill_paragraph(
47        &mut self,
48        _paragraph: &Self::Paragraph,
49        _position: Point,
50        _color: Color,
51        _clip_bounds: Rectangle,
52    ) {
53    }
54
55    fn fill_editor(
56        &mut self,
57        _editor: &Self::Editor,
58        _position: Point,
59        _color: Color,
60        _clip_bounds: Rectangle,
61    ) {
62    }
63
64    fn fill_text(
65        &mut self,
66        _paragraph: Text,
67        _position: Point,
68        _color: Color,
69        _clip_bounds: Rectangle,
70    ) {
71    }
72}
73
74impl text::Paragraph for () {
75    type Font = Font;
76
77    fn with_text(_text: Text<&str>) -> Self {}
78
79    fn with_spans<Link>(
80        _text: Text<&[text::Span<'_, Link, Self::Font>], Self::Font>,
81    ) -> Self {
82    }
83
84    fn resize(&mut self, _new_bounds: Size) {}
85
86    fn compare(&self, _text: Text<()>) -> text::Difference {
87        text::Difference::None
88    }
89
90    fn align_x(&self) -> text::Alignment {
91        text::Alignment::Default
92    }
93
94    fn align_y(&self) -> alignment::Vertical {
95        alignment::Vertical::Top
96    }
97
98    fn grapheme_position(&self, _line: usize, _index: usize) -> Option<Point> {
99        None
100    }
101
102    fn min_bounds(&self) -> Size {
103        Size::ZERO
104    }
105
106    fn hit_test(&self, _point: Point) -> Option<text::Hit> {
107        None
108    }
109
110    fn hit_span(&self, _point: Point) -> Option<usize> {
111        None
112    }
113
114    fn span_bounds(&self, _index: usize) -> Vec<Rectangle> {
115        vec![]
116    }
117}
118
119impl text::Editor for () {
120    type Font = Font;
121
122    fn with_text(_text: &str) -> Self {}
123
124    fn is_empty(&self) -> bool {
125        true
126    }
127
128    fn cursor(&self) -> text::editor::Cursor {
129        text::editor::Cursor::Caret(Point::ORIGIN)
130    }
131
132    fn cursor_position(&self) -> (usize, usize) {
133        (0, 0)
134    }
135
136    fn selection(&self) -> Option<String> {
137        None
138    }
139
140    fn line(&self, _index: usize) -> Option<text::editor::Line<'_>> {
141        None
142    }
143
144    fn line_count(&self) -> usize {
145        0
146    }
147
148    fn perform(&mut self, _action: text::editor::Action) {}
149
150    fn bounds(&self) -> Size {
151        Size::ZERO
152    }
153
154    fn min_bounds(&self) -> Size {
155        Size::ZERO
156    }
157
158    fn update(
159        &mut self,
160        _new_bounds: Size,
161        _new_font: Self::Font,
162        _new_size: Pixels,
163        _new_line_height: text::LineHeight,
164        _new_wrapping: text::Wrapping,
165        _new_highlighter: &mut impl text::Highlighter,
166    ) {
167    }
168
169    fn highlight<H: text::Highlighter>(
170        &mut self,
171        _font: Self::Font,
172        _highlighter: &mut H,
173        _format_highlight: impl Fn(
174            &H::Highlight,
175        ) -> text::highlighter::Format<Self::Font>,
176    ) {
177    }
178}
179
180impl image::Renderer for () {
181    type Handle = image::Handle;
182
183    fn measure_image(&self, _handle: &Self::Handle) -> Size<u32> {
184        Size::default()
185    }
186
187    fn draw_image(&mut self, _image: Image, _bounds: Rectangle) {}
188}
189
190impl svg::Renderer for () {
191    fn measure_svg(&self, _handle: &svg::Handle) -> Size<u32> {
192        Size::default()
193    }
194
195    fn draw_svg(&mut self, _svg: svg::Svg, _bounds: Rectangle) {}
196}
iced_core/renderer/null.rs

iced_core/renderer/
null.rs
