iced_core/renderer/
null.rs

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 reset(&mut self, _new_bounds: Rectangle) {}
20
21    fn fill_quad(
22        &mut self,
23        _quad: renderer::Quad,
24        _background: impl Into<Background>,
25    ) {
26    }
27
28    fn allocate_image(
29        &mut self,
30        handle: &image::Handle,
31        callback: impl FnOnce(Result<image::Allocation, image::Error>)
32        + Send
33        + 'static,
34    ) {
35        #[allow(unsafe_code)]
36        callback(Ok(unsafe { image::allocate(handle, Size::new(100, 100)) }));
37    }
38}
39
40impl text::Renderer for () {
41    type Font = Font;
42    type Paragraph = ();
43    type Editor = ();
44
45    const ICON_FONT: Font = Font::DEFAULT;
46    const CHECKMARK_ICON: char = '0';
47    const ARROW_DOWN_ICON: char = '0';
48    const SCROLL_UP_ICON: char = '0';
49    const SCROLL_DOWN_ICON: char = '0';
50    const SCROLL_LEFT_ICON: char = '0';
51    const SCROLL_RIGHT_ICON: char = '0';
52    const ICED_LOGO: char = '0';
53
54    fn default_font(&self) -> Self::Font {
55        Font::default()
56    }
57
58    fn default_size(&self) -> Pixels {
59        Pixels(16.0)
60    }
61
62    fn fill_paragraph(
63        &mut self,
64        _paragraph: &Self::Paragraph,
65        _position: Point,
66        _color: Color,
67        _clip_bounds: Rectangle,
68    ) {
69    }
70
71    fn fill_editor(
72        &mut self,
73        _editor: &Self::Editor,
74        _position: Point,
75        _color: Color,
76        _clip_bounds: Rectangle,
77    ) {
78    }
79
80    fn fill_text(
81        &mut self,
82        _paragraph: Text,
83        _position: Point,
84        _color: Color,
85        _clip_bounds: Rectangle,
86    ) {
87    }
88}
89
90impl text::Paragraph for () {
91    type Font = Font;
92
93    fn with_text(_text: Text<&str>) -> Self {}
94
95    fn with_spans<Link>(
96        _text: Text<&[text::Span<'_, Link, Self::Font>], Self::Font>,
97    ) -> Self {
98    }
99
100    fn resize(&mut self, _new_bounds: Size) {}
101
102    fn compare(&self, _text: Text<()>) -> text::Difference {
103        text::Difference::None
104    }
105
106    fn size(&self) -> Pixels {
107        Pixels(16.0)
108    }
109
110    fn font(&self) -> Font {
111        Font::DEFAULT
112    }
113
114    fn line_height(&self) -> text::LineHeight {
115        text::LineHeight::default()
116    }
117
118    fn align_x(&self) -> text::Alignment {
119        text::Alignment::Default
120    }
121
122    fn align_y(&self) -> alignment::Vertical {
123        alignment::Vertical::Top
124    }
125
126    fn wrapping(&self) -> text::Wrapping {
127        text::Wrapping::default()
128    }
129
130    fn shaping(&self) -> text::Shaping {
131        text::Shaping::default()
132    }
133
134    fn grapheme_position(&self, _line: usize, _index: usize) -> Option<Point> {
135        None
136    }
137
138    fn bounds(&self) -> Size {
139        Size::ZERO
140    }
141
142    fn min_bounds(&self) -> Size {
143        Size::ZERO
144    }
145
146    fn hit_test(&self, _point: Point) -> Option<text::Hit> {
147        None
148    }
149
150    fn hit_span(&self, _point: Point) -> Option<usize> {
151        None
152    }
153
154    fn span_bounds(&self, _index: usize) -> Vec<Rectangle> {
155        vec![]
156    }
157}
158
159impl text::Editor for () {
160    type Font = Font;
161
162    fn with_text(_text: &str) -> Self {}
163
164    fn is_empty(&self) -> bool {
165        true
166    }
167
168    fn cursor(&self) -> text::editor::Cursor {
169        text::editor::Cursor {
170            position: text::editor::Position { line: 0, column: 0 },
171            selection: None,
172        }
173    }
174
175    fn selection(&self) -> text::editor::Selection {
176        text::editor::Selection::Caret(Point::ORIGIN)
177    }
178
179    fn copy(&self) -> Option<String> {
180        None
181    }
182
183    fn line(&self, _index: usize) -> Option<text::editor::Line<'_>> {
184        None
185    }
186
187    fn line_count(&self) -> usize {
188        0
189    }
190
191    fn perform(&mut self, _action: text::editor::Action) {}
192
193    fn move_to(&mut self, _cursor: text::editor::Cursor) {}
194
195    fn bounds(&self) -> Size {
196        Size::ZERO
197    }
198
199    fn min_bounds(&self) -> Size {
200        Size::ZERO
201    }
202
203    fn update(
204        &mut self,
205        _new_bounds: Size,
206        _new_font: Self::Font,
207        _new_size: Pixels,
208        _new_line_height: text::LineHeight,
209        _new_wrapping: text::Wrapping,
210        _new_highlighter: &mut impl text::Highlighter,
211    ) {
212    }
213
214    fn highlight<H: text::Highlighter>(
215        &mut self,
216        _font: Self::Font,
217        _highlighter: &mut H,
218        _format_highlight: impl Fn(
219            &H::Highlight,
220        ) -> text::highlighter::Format<Self::Font>,
221    ) {
222    }
223}
224
225impl image::Renderer for () {
226    type Handle = image::Handle;
227
228    fn load_image(
229        &self,
230        handle: &Self::Handle,
231    ) -> Result<image::Allocation, image::Error> {
232        #[allow(unsafe_code)]
233        Ok(unsafe { image::allocate(handle, Size::new(100, 100)) })
234    }
235
236    fn measure_image(&self, _handle: &Self::Handle) -> Option<Size<u32>> {
237        Some(Size::new(100, 100))
238    }
239
240    fn draw_image(
241        &mut self,
242        _image: Image,
243        _bounds: Rectangle,
244        _clip_bounds: Rectangle,
245    ) {
246    }
247}
248
249impl svg::Renderer for () {
250    fn measure_svg(&self, _handle: &svg::Handle) -> Size<u32> {
251        Size::default()
252    }
253
254    fn draw_svg(
255        &mut self,
256        _svg: svg::Svg,
257        _bounds: Rectangle,
258        _clip_bounds: Rectangle,
259    ) {
260    }
261}
iced_core/renderer/null.rs

iced_core/renderer/
null.rs
