1use std::ops::Range;
2
3use crate::{
4 color::Color,
5 geometry::{
6 deserialize_vec2f,
7 rect::RectF,
8 vector::{vec2f, Vector2F},
9 },
10 json::ToJson,
11 platform::CursorStyle,
12 scene::{self, CornerRadii, CursorRegion, Quad},
13 AnyElement, Element, SizeConstraint, ViewContext,
14};
15use schemars::JsonSchema;
16use serde::Deserialize;
17use serde_json::json;
18
19#[derive(Clone, Copy, Debug, Default, Deserialize, JsonSchema)]
20pub struct ContainerStyle {
21 #[serde(default)]
22 pub margin: Margin,
23 #[serde(default)]
24 pub padding: Padding,
25 #[serde(rename = "background")]
26 pub background_color: Option<Color>,
27 #[serde(rename = "overlay")]
28 pub overlay_color: Option<Color>,
29 #[serde(default)]
30 pub border: Border,
31 #[serde(default)]
32 #[serde(alias = "corner_radius")]
33 pub corner_radii: CornerRadii,
34 #[serde(default)]
35 pub shadow: Option<Shadow>,
36 #[serde(default)]
37 pub cursor: Option<CursorStyle>,
38}
39
40impl ContainerStyle {
41 pub fn fill(color: Color) -> Self {
42 Self {
43 background_color: Some(color),
44 ..Default::default()
45 }
46 }
47
48 pub fn additional_length(&self) -> f32 {
49 self.padding.left
50 + self.padding.right
51 + self.border.width * 2.
52 + self.margin.left
53 + self.margin.right
54 }
55}
56
57pub struct Container<V> {
58 child: AnyElement<V>,
59 style: ContainerStyle,
60}
61
62impl<V> Container<V> {
63 pub fn new(child: AnyElement<V>) -> Self {
64 Self {
65 child,
66 style: Default::default(),
67 }
68 }
69
70 pub fn with_style(mut self, style: ContainerStyle) -> Self {
71 self.style = style;
72 self
73 }
74
75 pub fn with_margin_top(mut self, margin: f32) -> Self {
76 self.style.margin.top = margin;
77 self
78 }
79
80 pub fn with_margin_bottom(mut self, margin: f32) -> Self {
81 self.style.margin.bottom = margin;
82 self
83 }
84
85 pub fn with_margin_left(mut self, margin: f32) -> Self {
86 self.style.margin.left = margin;
87 self
88 }
89
90 pub fn with_margin_right(mut self, margin: f32) -> Self {
91 self.style.margin.right = margin;
92 self
93 }
94
95 pub fn with_horizontal_padding(mut self, padding: f32) -> Self {
96 self.style.padding.left = padding;
97 self.style.padding.right = padding;
98 self
99 }
100
101 pub fn with_vertical_padding(mut self, padding: f32) -> Self {
102 self.style.padding.top = padding;
103 self.style.padding.bottom = padding;
104 self
105 }
106
107 pub fn with_uniform_padding(mut self, padding: f32) -> Self {
108 self.style.padding = Padding {
109 top: padding,
110 left: padding,
111 bottom: padding,
112 right: padding,
113 };
114 self
115 }
116
117 pub fn with_padding_left(mut self, padding: f32) -> Self {
118 self.style.padding.left = padding;
119 self
120 }
121
122 pub fn with_padding_right(mut self, padding: f32) -> Self {
123 self.style.padding.right = padding;
124 self
125 }
126
127 pub fn with_padding_top(mut self, padding: f32) -> Self {
128 self.style.padding.top = padding;
129 self
130 }
131
132 pub fn with_padding_bottom(mut self, padding: f32) -> Self {
133 self.style.padding.bottom = padding;
134 self
135 }
136
137 pub fn with_background_color(mut self, color: Color) -> Self {
138 self.style.background_color = Some(color);
139 self
140 }
141
142 pub fn with_overlay_color(mut self, color: Color) -> Self {
143 self.style.overlay_color = Some(color);
144 self
145 }
146
147 pub fn with_border(mut self, border: Border) -> Self {
148 self.style.border = border;
149 self
150 }
151
152 pub fn with_corner_radius(mut self, radius: f32) -> Self {
153 self.style.corner_radii.top_left = radius;
154 self.style.corner_radii.top_right = radius;
155 self.style.corner_radii.bottom_right = radius;
156 self.style.corner_radii.bottom_left = radius;
157 self
158 }
159
160 pub fn with_shadow(mut self, offset: Vector2F, blur: f32, color: Color) -> Self {
161 self.style.shadow = Some(Shadow {
162 offset,
163 blur,
164 color,
165 });
166 self
167 }
168
169 pub fn with_cursor(mut self, style: CursorStyle) -> Self {
170 self.style.cursor = Some(style);
171 self
172 }
173
174 fn margin_size(&self) -> Vector2F {
175 vec2f(
176 self.style.margin.left + self.style.margin.right,
177 self.style.margin.top + self.style.margin.bottom,
178 )
179 }
180
181 fn padding_size(&self) -> Vector2F {
182 vec2f(
183 self.style.padding.left + self.style.padding.right,
184 self.style.padding.top + self.style.padding.bottom,
185 )
186 }
187
188 fn border_size(&self) -> Vector2F {
189 let mut x = 0.0;
190 if self.style.border.left {
191 x += self.style.border.width;
192 }
193 if self.style.border.right {
194 x += self.style.border.width;
195 }
196
197 let mut y = 0.0;
198 if self.style.border.top {
199 y += self.style.border.width;
200 }
201 if self.style.border.bottom {
202 y += self.style.border.width;
203 }
204
205 vec2f(x, y)
206 }
207}
208
209#[derive(Copy, Clone, Debug, Default, JsonSchema)]
210pub struct Border {
211 pub color: Color,
212 pub width: f32,
213 pub overlay: bool,
214 pub top: bool,
215 pub bottom: bool,
216 pub left: bool,
217 pub right: bool,
218}
219
220impl Into<scene::Border> for Border {
221 fn into(self) -> scene::Border {
222 scene::Border {
223 color: self.color,
224 left: if self.left { self.width } else { 0.0 },
225 right: if self.right { self.width } else { 0.0 },
226 top: if self.top { self.width } else { 0.0 },
227 bottom: if self.bottom { self.width } else { 0.0 },
228 }
229 }
230}
231
232impl Border {
233 pub fn new(width: f32, color: Color) -> Self {
234 Self {
235 width,
236 color,
237 overlay: false,
238 top: false,
239 left: false,
240 bottom: false,
241 right: false,
242 }
243 }
244
245 pub fn all(width: f32, color: Color) -> Self {
246 Self {
247 width,
248 color,
249 overlay: false,
250 top: true,
251 left: true,
252 bottom: true,
253 right: true,
254 }
255 }
256
257 pub fn top(width: f32, color: Color) -> Self {
258 let mut border = Self::new(width, color);
259 border.top = true;
260 border
261 }
262
263 pub fn left(width: f32, color: Color) -> Self {
264 let mut border = Self::new(width, color);
265 border.left = true;
266 border
267 }
268
269 pub fn bottom(width: f32, color: Color) -> Self {
270 let mut border = Self::new(width, color);
271 border.bottom = true;
272 border
273 }
274
275 pub fn right(width: f32, color: Color) -> Self {
276 let mut border = Self::new(width, color);
277 border.right = true;
278 border
279 }
280
281 pub fn with_sides(mut self, top: bool, left: bool, bottom: bool, right: bool) -> Self {
282 self.top = top;
283 self.left = left;
284 self.bottom = bottom;
285 self.right = right;
286 self
287 }
288
289 pub fn top_width(&self) -> f32 {
290 if self.top {
291 self.width
292 } else {
293 0.0
294 }
295 }
296
297 pub fn left_width(&self) -> f32 {
298 if self.left {
299 self.width
300 } else {
301 0.0
302 }
303 }
304}
305
306impl<'de> Deserialize<'de> for Border {
307 fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
308 where
309 D: serde::Deserializer<'de>,
310 {
311 #[derive(Deserialize)]
312 struct BorderData {
313 pub width: f32,
314 pub color: Color,
315 #[serde(default)]
316 pub overlay: bool,
317 #[serde(default)]
318 pub top: bool,
319 #[serde(default)]
320 pub right: bool,
321 #[serde(default)]
322 pub bottom: bool,
323 #[serde(default)]
324 pub left: bool,
325 }
326
327 let data = BorderData::deserialize(deserializer)?;
328 let mut border = Border {
329 width: data.width,
330 color: data.color,
331 overlay: data.overlay,
332 top: data.top,
333 bottom: data.bottom,
334 left: data.left,
335 right: data.right,
336 };
337 if !border.top && !border.bottom && !border.left && !border.right {
338 border.top = true;
339 border.bottom = true;
340 border.left = true;
341 border.right = true;
342 }
343 Ok(border)
344 }
345}
346
347impl ToJson for Border {
348 fn to_json(&self) -> serde_json::Value {
349 let mut value = json!({});
350 if self.top {
351 value["top"] = json!(self.width);
352 }
353 if self.right {
354 value["right"] = json!(self.width);
355 }
356 if self.bottom {
357 value["bottom"] = json!(self.width);
358 }
359 if self.left {
360 value["left"] = json!(self.width);
361 }
362 value
363 }
364}
365
366impl<V: 'static> Element<V> for Container<V> {
367 type LayoutState = ();
368 type PaintState = ();
369
370 fn layout(
371 &mut self,
372 constraint: SizeConstraint,
373 view: &mut V,
374 cx: &mut ViewContext<V>,
375 ) -> (Vector2F, Self::LayoutState) {
376 let mut size_buffer = self.margin_size() + self.padding_size();
377 if !self.style.border.overlay {
378 size_buffer += self.border_size();
379 }
380 let child_constraint = SizeConstraint {
381 min: (constraint.min - size_buffer).max(Vector2F::zero()),
382 max: (constraint.max - size_buffer).max(Vector2F::zero()),
383 };
384 let child_size = self.child.layout(child_constraint, view, cx);
385 (child_size + size_buffer, ())
386 }
387
388 fn paint(
389 &mut self,
390 bounds: RectF,
391 visible_bounds: RectF,
392 _: &mut Self::LayoutState,
393 view: &mut V,
394 cx: &mut ViewContext<V>,
395 ) -> Self::PaintState {
396 let quad_bounds = RectF::from_points(
397 bounds.origin() + vec2f(self.style.margin.left, self.style.margin.top),
398 bounds.lower_right() - vec2f(self.style.margin.right, self.style.margin.bottom),
399 );
400
401 if let Some(shadow) = self.style.shadow.as_ref() {
402 cx.scene().push_shadow(scene::Shadow {
403 bounds: quad_bounds + shadow.offset,
404 corner_radii: self.style.corner_radii,
405 sigma: shadow.blur,
406 color: shadow.color,
407 });
408 }
409
410 if let Some(hit_bounds) = quad_bounds.intersection(visible_bounds) {
411 if let Some(style) = self.style.cursor {
412 cx.scene().push_cursor_region(CursorRegion {
413 bounds: hit_bounds,
414 style,
415 });
416 }
417 }
418
419 let child_origin =
420 quad_bounds.origin() + vec2f(self.style.padding.left, self.style.padding.top);
421
422 if self.style.border.overlay {
423 cx.scene().push_quad(Quad {
424 bounds: quad_bounds,
425 background: self.style.background_color,
426 border: Default::default(),
427 corner_radii: self.style.corner_radii.into(),
428 });
429
430 self.child.paint(child_origin, visible_bounds, view, cx);
431
432 cx.scene().push_layer(None);
433 cx.scene().push_quad(Quad {
434 bounds: quad_bounds,
435 background: self.style.overlay_color,
436 border: self.style.border.into(),
437 corner_radii: self.style.corner_radii.into(),
438 });
439 cx.scene().pop_layer();
440 } else {
441 cx.scene().push_quad(Quad {
442 bounds: quad_bounds,
443 background: self.style.background_color,
444 border: self.style.border.into(),
445 corner_radii: self.style.corner_radii.into(),
446 });
447
448 let child_origin = child_origin
449 + vec2f(
450 self.style.border.left_width(),
451 self.style.border.top_width(),
452 );
453 self.child.paint(child_origin, visible_bounds, view, cx);
454
455 if self.style.overlay_color.is_some() {
456 cx.scene().push_layer(None);
457 cx.scene().push_quad(Quad {
458 bounds: quad_bounds,
459 background: self.style.overlay_color,
460 border: Default::default(),
461 corner_radii: self.style.corner_radii.into(),
462 });
463 cx.scene().pop_layer();
464 }
465 }
466 }
467
468 fn rect_for_text_range(
469 &self,
470 range_utf16: Range<usize>,
471 _: RectF,
472 _: RectF,
473 _: &Self::LayoutState,
474 _: &Self::PaintState,
475 view: &V,
476 cx: &ViewContext<V>,
477 ) -> Option<RectF> {
478 self.child.rect_for_text_range(range_utf16, view, cx)
479 }
480
481 fn debug(
482 &self,
483 bounds: RectF,
484 _: &Self::LayoutState,
485 _: &Self::PaintState,
486 view: &V,
487 cx: &ViewContext<V>,
488 ) -> serde_json::Value {
489 json!({
490 "type": "Container",
491 "bounds": bounds.to_json(),
492 "details": self.style.to_json(),
493 "child": self.child.debug(view, cx),
494 })
495 }
496}
497
498impl ToJson for ContainerStyle {
499 fn to_json(&self) -> serde_json::Value {
500 json!({
501 "margin": self.margin.to_json(),
502 "padding": self.padding.to_json(),
503 "background_color": self.background_color.to_json(),
504 "border": self.border.to_json(),
505 "corner_radius": self.corner_radii,
506 "shadow": self.shadow.to_json(),
507 })
508 }
509}
510
511#[derive(Clone, Copy, Debug, Default, JsonSchema)]
512pub struct Margin {
513 pub top: f32,
514 pub bottom: f32,
515 pub left: f32,
516 pub right: f32,
517}
518
519impl ToJson for Margin {
520 fn to_json(&self) -> serde_json::Value {
521 let mut value = json!({});
522 if self.top > 0. {
523 value["top"] = json!(self.top);
524 }
525 if self.right > 0. {
526 value["right"] = json!(self.right);
527 }
528 if self.bottom > 0. {
529 value["bottom"] = json!(self.bottom);
530 }
531 if self.left > 0. {
532 value["left"] = json!(self.left);
533 }
534 value
535 }
536}
537
538#[derive(Clone, Copy, Debug, Default, JsonSchema)]
539pub struct Padding {
540 pub top: f32,
541 pub left: f32,
542 pub bottom: f32,
543 pub right: f32,
544}
545
546impl Padding {
547 pub fn horizontal(padding: f32) -> Self {
548 Self {
549 left: padding,
550 right: padding,
551 ..Default::default()
552 }
553 }
554
555 pub fn vertical(padding: f32) -> Self {
556 Self {
557 top: padding,
558 bottom: padding,
559 ..Default::default()
560 }
561 }
562}
563
564impl<'de> Deserialize<'de> for Padding {
565 fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
566 where
567 D: serde::Deserializer<'de>,
568 {
569 let spacing = Spacing::deserialize(deserializer)?;
570 Ok(match spacing {
571 Spacing::Uniform(size) => Padding {
572 top: size,
573 left: size,
574 bottom: size,
575 right: size,
576 },
577 Spacing::Specific {
578 top,
579 left,
580 bottom,
581 right,
582 } => Padding {
583 top,
584 left,
585 bottom,
586 right,
587 },
588 })
589 }
590}
591
592impl<'de> Deserialize<'de> for Margin {
593 fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
594 where
595 D: serde::Deserializer<'de>,
596 {
597 let spacing = Spacing::deserialize(deserializer)?;
598 Ok(match spacing {
599 Spacing::Uniform(size) => Margin {
600 top: size,
601 left: size,
602 bottom: size,
603 right: size,
604 },
605 Spacing::Specific {
606 top,
607 left,
608 bottom,
609 right,
610 } => Margin {
611 top,
612 left,
613 bottom,
614 right,
615 },
616 })
617 }
618}
619#[derive(Deserialize)]
620#[serde(untagged)]
621enum Spacing {
622 Uniform(f32),
623 Specific {
624 #[serde(default)]
625 top: f32,
626 #[serde(default)]
627 left: f32,
628 #[serde(default)]
629 bottom: f32,
630 #[serde(default)]
631 right: f32,
632 },
633}
634
635impl Padding {
636 pub fn uniform(padding: f32) -> Self {
637 Self {
638 top: padding,
639 left: padding,
640 bottom: padding,
641 right: padding,
642 }
643 }
644}
645
646impl ToJson for Padding {
647 fn to_json(&self) -> serde_json::Value {
648 let mut value = json!({});
649 if self.top > 0. {
650 value["top"] = json!(self.top);
651 }
652 if self.right > 0. {
653 value["right"] = json!(self.right);
654 }
655 if self.bottom > 0. {
656 value["bottom"] = json!(self.bottom);
657 }
658 if self.left > 0. {
659 value["left"] = json!(self.left);
660 }
661 value
662 }
663}
664
665#[derive(Clone, Copy, Debug, Default, Deserialize, JsonSchema)]
666pub struct Shadow {
667 #[serde(default, deserialize_with = "deserialize_vec2f")]
668 #[schemars(with = "Vec::<f32>")]
669 offset: Vector2F,
670 #[serde(default)]
671 blur: f32,
672 #[serde(default)]
673 color: Color,
674}
675
676impl ToJson for Shadow {
677 fn to_json(&self) -> serde_json::Value {
678 json!({
679 "offset": self.offset.to_json(),
680 "blur": self.blur,
681 "color": self.color.to_json()
682 })
683 }
684}