507 lines
13 KiB
Rust
507 lines
13 KiB
Rust
use std::ops::Range;
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use crate::{
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color::Color,
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geometry::{
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deserialize_vec2f,
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rect::RectF,
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vector::{vec2f, Vector2F},
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},
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json::ToJson,
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platform::CursorStyle,
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scene::{self, Border, CursorRegion, Quad},
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Element, ElementBox, SceneBuilder, SizeConstraint, View, ViewContext,
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};
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use serde::Deserialize;
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use serde_json::json;
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#[derive(Clone, Copy, Debug, Default, Deserialize)]
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pub struct ContainerStyle {
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#[serde(default)]
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pub margin: Margin,
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#[serde(default)]
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pub padding: Padding,
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#[serde(rename = "background")]
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pub background_color: Option<Color>,
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#[serde(rename = "overlay")]
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pub overlay_color: Option<Color>,
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#[serde(default)]
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pub border: Border,
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#[serde(default)]
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pub corner_radius: f32,
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#[serde(default)]
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pub shadow: Option<Shadow>,
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#[serde(default)]
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pub cursor: Option<CursorStyle>,
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}
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pub struct Container<V: View> {
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child: ElementBox<V>,
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style: ContainerStyle,
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}
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impl<V: View> Container<V> {
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pub fn new(child: ElementBox<V>) -> Self {
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Self {
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child,
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style: Default::default(),
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}
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}
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pub fn with_style(mut self, style: ContainerStyle) -> Self {
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self.style = style;
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self
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}
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pub fn with_margin_top(mut self, margin: f32) -> Self {
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self.style.margin.top = margin;
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self
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}
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pub fn with_margin_bottom(mut self, margin: f32) -> Self {
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self.style.margin.bottom = margin;
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self
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}
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pub fn with_margin_left(mut self, margin: f32) -> Self {
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self.style.margin.left = margin;
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self
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}
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pub fn with_margin_right(mut self, margin: f32) -> Self {
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self.style.margin.right = margin;
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self
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}
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pub fn with_horizontal_padding(mut self, padding: f32) -> Self {
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self.style.padding.left = padding;
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self.style.padding.right = padding;
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self
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}
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pub fn with_vertical_padding(mut self, padding: f32) -> Self {
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self.style.padding.top = padding;
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self.style.padding.bottom = padding;
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self
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}
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pub fn with_uniform_padding(mut self, padding: f32) -> Self {
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self.style.padding = Padding {
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top: padding,
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left: padding,
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bottom: padding,
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right: padding,
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};
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self
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}
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pub fn with_padding_left(mut self, padding: f32) -> Self {
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self.style.padding.left = padding;
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self
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}
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pub fn with_padding_right(mut self, padding: f32) -> Self {
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self.style.padding.right = padding;
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self
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}
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pub fn with_padding_top(mut self, padding: f32) -> Self {
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self.style.padding.top = padding;
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self
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}
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pub fn with_padding_bottom(mut self, padding: f32) -> Self {
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self.style.padding.bottom = padding;
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self
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}
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pub fn with_background_color(mut self, color: Color) -> Self {
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self.style.background_color = Some(color);
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self
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}
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pub fn with_overlay_color(mut self, color: Color) -> Self {
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self.style.overlay_color = Some(color);
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self
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}
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pub fn with_border(mut self, border: Border) -> Self {
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self.style.border = border;
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self
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}
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pub fn with_corner_radius(mut self, radius: f32) -> Self {
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self.style.corner_radius = radius;
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self
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}
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pub fn with_shadow(mut self, offset: Vector2F, blur: f32, color: Color) -> Self {
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self.style.shadow = Some(Shadow {
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offset,
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blur,
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color,
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});
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self
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}
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pub fn with_cursor(mut self, style: CursorStyle) -> Self {
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self.style.cursor = Some(style);
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self
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}
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fn margin_size(&self) -> Vector2F {
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vec2f(
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self.style.margin.left + self.style.margin.right,
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self.style.margin.top + self.style.margin.bottom,
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)
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}
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fn padding_size(&self) -> Vector2F {
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vec2f(
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self.style.padding.left + self.style.padding.right,
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self.style.padding.top + self.style.padding.bottom,
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)
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}
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fn border_size(&self) -> Vector2F {
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let mut x = 0.0;
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if self.style.border.left {
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x += self.style.border.width;
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}
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if self.style.border.right {
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x += self.style.border.width;
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}
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let mut y = 0.0;
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if self.style.border.top {
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y += self.style.border.width;
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}
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if self.style.border.bottom {
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y += self.style.border.width;
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}
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vec2f(x, y)
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}
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}
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impl<V: View> Element<V> for Container<V> {
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type LayoutState = ();
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type PaintState = ();
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fn layout(
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&mut self,
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constraint: SizeConstraint,
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view: &mut V,
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cx: &mut ViewContext<V>,
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) -> (Vector2F, Self::LayoutState) {
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let mut size_buffer = self.margin_size() + self.padding_size();
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if !self.style.border.overlay {
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size_buffer += self.border_size();
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}
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let child_constraint = SizeConstraint {
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min: (constraint.min - size_buffer).max(Vector2F::zero()),
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max: (constraint.max - size_buffer).max(Vector2F::zero()),
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};
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let child_size = self.child.layout(child_constraint, view, cx);
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(child_size + size_buffer, ())
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}
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fn paint(
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&mut self,
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scene: &mut SceneBuilder,
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bounds: RectF,
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visible_bounds: RectF,
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_: &mut Self::LayoutState,
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view: &mut V,
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cx: &mut ViewContext<V>,
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) -> Self::PaintState {
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let quad_bounds = RectF::from_points(
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bounds.origin() + vec2f(self.style.margin.left, self.style.margin.top),
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bounds.lower_right() - vec2f(self.style.margin.right, self.style.margin.bottom),
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);
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if let Some(shadow) = self.style.shadow.as_ref() {
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cx.scene.push_shadow(scene::Shadow {
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bounds: quad_bounds + shadow.offset,
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corner_radius: self.style.corner_radius,
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sigma: shadow.blur,
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color: shadow.color,
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});
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}
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if let Some(hit_bounds) = quad_bounds.intersection(visible_bounds) {
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if let Some(style) = self.style.cursor {
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cx.scene.push_cursor_region(CursorRegion {
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bounds: hit_bounds,
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style,
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});
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}
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}
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let child_origin =
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quad_bounds.origin() + vec2f(self.style.padding.left, self.style.padding.top);
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if self.style.border.overlay {
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cx.scene.push_quad(Quad {
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bounds: quad_bounds,
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background: self.style.background_color,
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border: Default::default(),
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corner_radius: self.style.corner_radius,
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});
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self.child
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.paint(scene, child_origin, visible_bounds, view, cx);
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cx.scene.push_layer(None);
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cx.scene.push_quad(Quad {
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bounds: quad_bounds,
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background: self.style.overlay_color,
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border: self.style.border,
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corner_radius: self.style.corner_radius,
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});
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cx.scene.pop_layer();
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} else {
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cx.scene.push_quad(Quad {
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bounds: quad_bounds,
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background: self.style.background_color,
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border: self.style.border,
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corner_radius: self.style.corner_radius,
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});
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let child_origin = child_origin
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+ vec2f(
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self.style.border.left_width(),
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self.style.border.top_width(),
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);
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self.child
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.paint(scene, child_origin, visible_bounds, view, cx);
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if self.style.overlay_color.is_some() {
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cx.scene.push_layer(None);
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cx.scene.push_quad(Quad {
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bounds: quad_bounds,
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background: self.style.overlay_color,
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border: Default::default(),
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corner_radius: 0.,
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});
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cx.scene.pop_layer();
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}
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}
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}
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fn rect_for_text_range(
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&self,
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range_utf16: Range<usize>,
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_: RectF,
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_: RectF,
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_: &Self::LayoutState,
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_: &Self::PaintState,
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view: &V,
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cx: &ViewContext<V>,
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) -> Option<RectF> {
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self.child.rect_for_text_range(range_utf16, view, cx)
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}
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fn debug(
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&self,
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bounds: RectF,
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_: &Self::LayoutState,
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_: &Self::PaintState,
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view: &V,
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cx: &crate::DebugContext,
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) -> serde_json::Value {
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json!({
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"type": "Container",
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"bounds": bounds.to_json(),
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"details": self.style.to_json(),
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"child": self.child.debug(view, cx),
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})
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}
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}
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impl ToJson for ContainerStyle {
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fn to_json(&self) -> serde_json::Value {
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json!({
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"margin": self.margin.to_json(),
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"padding": self.padding.to_json(),
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"background_color": self.background_color.to_json(),
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"border": self.border.to_json(),
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"corner_radius": self.corner_radius,
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"shadow": self.shadow.to_json(),
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})
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}
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}
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#[derive(Clone, Copy, Debug, Default)]
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pub struct Margin {
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pub top: f32,
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pub left: f32,
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pub bottom: f32,
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pub right: f32,
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}
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impl ToJson for Margin {
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fn to_json(&self) -> serde_json::Value {
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let mut value = json!({});
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if self.top > 0. {
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value["top"] = json!(self.top);
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}
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if self.right > 0. {
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value["right"] = json!(self.right);
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}
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if self.bottom > 0. {
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value["bottom"] = json!(self.bottom);
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}
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if self.left > 0. {
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value["left"] = json!(self.left);
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}
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value
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}
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}
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#[derive(Clone, Copy, Debug, Default)]
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pub struct Padding {
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pub top: f32,
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pub left: f32,
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pub bottom: f32,
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pub right: f32,
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}
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impl Padding {
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pub fn horizontal(padding: f32) -> Self {
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Self {
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left: padding,
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right: padding,
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..Default::default()
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}
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}
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pub fn vertical(padding: f32) -> Self {
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Self {
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top: padding,
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bottom: padding,
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..Default::default()
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}
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}
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}
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impl<'de> Deserialize<'de> for Padding {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: serde::Deserializer<'de>,
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{
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let spacing = Spacing::deserialize(deserializer)?;
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Ok(match spacing {
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Spacing::Uniform(size) => Padding {
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top: size,
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left: size,
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bottom: size,
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right: size,
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},
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Spacing::Specific {
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top,
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left,
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bottom,
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right,
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} => Padding {
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top,
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left,
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bottom,
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right,
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},
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})
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}
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}
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impl<'de> Deserialize<'de> for Margin {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: serde::Deserializer<'de>,
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{
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let spacing = Spacing::deserialize(deserializer)?;
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Ok(match spacing {
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Spacing::Uniform(size) => Margin {
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top: size,
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left: size,
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bottom: size,
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right: size,
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},
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Spacing::Specific {
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top,
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left,
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bottom,
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right,
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} => Margin {
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top,
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left,
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bottom,
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right,
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},
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})
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}
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}
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#[derive(Deserialize)]
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#[serde(untagged)]
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enum Spacing {
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Uniform(f32),
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Specific {
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#[serde(default)]
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top: f32,
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#[serde(default)]
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left: f32,
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#[serde(default)]
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bottom: f32,
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#[serde(default)]
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right: f32,
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},
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}
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impl Padding {
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pub fn uniform(padding: f32) -> Self {
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Self {
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top: padding,
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left: padding,
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bottom: padding,
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right: padding,
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}
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}
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}
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impl ToJson for Padding {
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fn to_json(&self) -> serde_json::Value {
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let mut value = json!({});
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if self.top > 0. {
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value["top"] = json!(self.top);
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}
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if self.right > 0. {
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value["right"] = json!(self.right);
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}
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if self.bottom > 0. {
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value["bottom"] = json!(self.bottom);
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}
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if self.left > 0. {
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value["left"] = json!(self.left);
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}
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value
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}
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}
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#[derive(Clone, Copy, Debug, Default, Deserialize)]
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pub struct Shadow {
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#[serde(default, deserialize_with = "deserialize_vec2f")]
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offset: Vector2F,
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#[serde(default)]
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blur: f32,
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#[serde(default)]
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color: Color,
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}
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impl ToJson for Shadow {
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fn to_json(&self) -> serde_json::Value {
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json!({
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"offset": self.offset.to_json(),
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"blur": self.blur,
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"color": self.color.to_json()
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})
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}
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}
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