335 lines
8.4 KiB
Rust
335 lines
8.4 KiB
Rust
use pathfinder_geometry::rect::RectF;
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use serde::Deserialize;
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use serde_json::json;
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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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vector::{vec2f, Vector2F},
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},
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json::ToJson,
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scene::{self, Border, Quad},
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AfterLayoutContext, Element, ElementBox, Event, EventContext, LayoutContext, PaintContext,
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SizeConstraint,
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};
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#[derive(Clone, 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(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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}
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pub struct Container {
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child: ElementBox,
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style: ContainerStyle,
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}
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impl Container {
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pub fn new(child: ElementBox) -> 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.clone();
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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_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_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_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_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_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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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 Element for Container {
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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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cx: &mut LayoutContext,
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) -> (Vector2F, Self::LayoutState) {
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let size_buffer = self.margin_size() + self.padding_size() + self.border_size();
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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, cx);
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(child_size + size_buffer, ())
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}
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fn after_layout(
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&mut self,
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_: Vector2F,
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_: &mut Self::LayoutState,
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cx: &mut AfterLayoutContext,
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) {
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self.child.after_layout(cx);
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}
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fn paint(
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&mut self,
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bounds: RectF,
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_: &mut Self::LayoutState,
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cx: &mut PaintContext,
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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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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 = quad_bounds.origin()
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+ vec2f(self.style.padding.left, self.style.padding.top)
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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.paint(child_origin, cx);
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}
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fn dispatch_event(
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&mut self,
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event: &Event,
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_: RectF,
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_: &mut Self::LayoutState,
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_: &mut Self::PaintState,
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cx: &mut EventContext,
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) -> bool {
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self.child.dispatch_event(event, 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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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(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, Debug, Default, Deserialize)]
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pub struct Margin {
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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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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, Debug, Default, Deserialize)]
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pub struct Padding {
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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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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, 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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