Merge pull request #14 from Demonthos/master

add more attributes and colors

Cargo.toml

@@ -6,7 +6,7 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-tui = { version = "0.16.0", features = ["crossterm"], default-features = false }
+tui = "0.17.0"
 crossterm = "0.22.1"
 anyhow = "1.0.42"
 thiserror = "1.0.24"

examples/border.rs

@@ -0,0 +1,27 @@
+use dioxus::prelude::*;
+
+fn main() {
+    rink::launch(app);
+}
+
+fn app(cx: Scope) -> Element {
+    let (radius, set_radius) = use_state(&cx, || 0);
+
+    cx.render(rsx! {
+        div {
+            width: "100%",
+            height: "100%",
+            justify_content: "center",
+            align_items: "center",
+            background_color: "hsl(248, 53%, 58%)",
+            onwheel: move |w| set_radius((radius + w.delta_y as i8).abs()),
+
+            border_style: "solid none solid double",
+            border_width: "thick",
+            border_radius: "{radius}px",
+            border_color: "#0000FF #FF00FF #FF0000 #00FF00",
+
+            "{radius}"
+        }
+    })
+}

examples/color_test.rs

@@ -0,0 +1,48 @@
+use dioxus::prelude::*;
+
+fn main() {
+    // rink::launch(app);
+    rink::launch_cfg(
+        app,
+        rink::Config {
+            rendering_mode: rink::RenderingMode::Ansi,
+        },
+    );
+}
+
+fn app(cx: Scope) -> Element {
+    let steps = 50;
+    cx.render(rsx! {
+        div{
+            width: "100%",
+            height: "100%",
+            flex_direction: "column",
+            (0..=steps).map(|x|
+                {
+                    let hue = x as f32*360.0/steps as f32;
+                    cx.render(rsx! {
+                        div{
+                            width: "100%",
+                            height: "100%",
+                            flex_direction: "row",
+                            (0..=steps).map(|y|
+                                {
+                                    let alpha = y as f32*100.0/steps as f32;
+                                    cx.render(rsx! {
+                                        div {
+                                            left: "{x}px",
+                                            top: "{y}px",
+                                            width: "10%",
+                                            height: "100%",
+                                            background_color: "hsl({hue}, 100%, 50%, {alpha}%)",
+                                        }
+                                    })
+                                }
+                            )
+                        }
+                    })
+                }
+            )
+        }
+    })
+}

examples/text.rs

@@ -2,9 +2,17 @@ use dioxus::prelude::*;
 
 fn main() {
     rink::launch(app);
+    // rink::launch_cfg(
+    //     app,
+    //     rink::Config {
+    //         rendering_mode: rink::RenderingMode::Ansi,
+    //     },
+    // )
 }
 
 fn app(cx: Scope) -> Element {
+    let (alpha, set_alpha) = use_state(&cx, || 100);
+
     cx.render(rsx! {
         div {
             width: "100%",
@@ -13,7 +21,9 @@ fn app(cx: Scope) -> Element {
             // justify_content: "center",
             // align_items: "center",
             // flex_direction: "row",
-            // background_color: "red",
+            onwheel: move |evt| {
+                set_alpha((alpha + evt.data.delta_y as i64).min(100).max(0));
+            },
 
             p {
                 background_color: "black",
@@ -21,6 +31,7 @@ fn app(cx: Scope) -> Element {
                 justify_content: "center",
                 align_items: "center",
                 // height: "10%",
+                color: "green",
                 "hi"
                 "hi"
                 "hi"
@@ -53,13 +64,6 @@ fn app(cx: Scope) -> Element {
                 "zib"
                 "zib"
                 "zib"
-                "zib"
-                "zib"
-                "zib"
-                "zib"
-                "zib"
-                "zib"
-                "zib"
             }
             p {
                 background_color: "yellow",
@@ -77,6 +81,47 @@ fn app(cx: Scope) -> Element {
                 background_color: "cyan",
                 "asd"
             }
+            div {
+                font_weight: "bold",
+                color: "#666666",
+                p {
+                    "bold"
+                }
+                p {
+                    font_weight: "normal",
+                    " normal"
+                }
+            }
+            p {
+                font_style: "italic",
+                color: "red",
+                "italic"
+            }
+            p {
+                text_decoration: "underline",
+                color: "rgba(255, 255, 255)",
+                "underline"
+            }
+            p {
+                text_decoration: "line-through",
+                color: "hsla(10, 100%, 70%)",
+                "line-through"
+            }
+            div{
+                position: "absolute",
+                top: "1px",
+                background_color: "rgba(255, 0, 0, 50%)",
+                width: "100%",
+                p {
+                    color: "rgba(255, 255, 255, {alpha}%)",
+                    background_color: "rgba(100, 100, 100, {alpha}%)",
+                    "rgba(255, 255, 255, {alpha}%)"
+                }
+                p {
+                    color: "rgba(255, 255, 255, 100%)",
+                    "rgba(255, 255, 255, 100%)"
+                }
+            }
         }
     })
 }

src/attributes.rs

@@ -30,15 +30,97 @@
 */
 
 use stretch2::{prelude::*, style::PositionType, style::Style};
-use tui::style::Style as TuiStyle;
+
+use crate::style::{RinkColor, RinkStyle};
 
 pub struct StyleModifer {
     pub style: Style,
-    pub tui_style: TuiStyle,
+    pub tui_style: RinkStyle,
+    pub tui_modifier: TuiModifier,
+}
+
+#[derive(Default)]
+pub struct TuiModifier {
+    pub borders: Borders,
+}
+
+#[derive(Default)]
+pub struct Borders {
+    pub top: BorderEdge,
+    pub right: BorderEdge,
+    pub bottom: BorderEdge,
+    pub left: BorderEdge,
+}
+
+impl Borders {
+    fn slice(&mut self) -> [&mut BorderEdge; 4] {
+        [
+            &mut self.top,
+            &mut self.right,
+            &mut self.bottom,
+            &mut self.left,
+        ]
+    }
+}
+
+pub struct BorderEdge {
+    pub color: Option<RinkColor>,
+    pub style: BorderStyle,
+    pub width: UnitSystem,
+    pub radius: UnitSystem,
+}
+
+impl Default for BorderEdge {
+    fn default() -> Self {
+        Self {
+            color: None,
+            style: BorderStyle::NONE,
+            width: UnitSystem::Point(0.0),
+            radius: UnitSystem::Point(0.0),
+        }
+    }
 }
 
-enum TuiModifier {
-    Text,
+#[derive(Clone, Copy)]
+pub enum BorderStyle {
+    DOTTED,
+    DASHED,
+    SOLID,
+    DOUBLE,
+    GROOVE,
+    RIDGE,
+    INSET,
+    OUTSET,
+    HIDDEN,
+    NONE,
+}
+
+impl BorderStyle {
+    pub fn symbol_set(&self) -> Option<tui::symbols::line::Set> {
+        use tui::symbols::line::*;
+        const DASHED: Set = Set {
+            horizontal: "╌",
+            vertical: "╎",
+            ..NORMAL
+        };
+        const DOTTED: Set = Set {
+            horizontal: "┈",
+            vertical: "┊",
+            ..NORMAL
+        };
+        match self {
+            BorderStyle::DOTTED => Some(DOTTED),
+            BorderStyle::DASHED => Some(DASHED),
+            BorderStyle::SOLID => Some(NORMAL),
+            BorderStyle::DOUBLE => Some(DOUBLE),
+            BorderStyle::GROOVE => Some(NORMAL),
+            BorderStyle::RIDGE => Some(NORMAL),
+            BorderStyle::INSET => Some(NORMAL),
+            BorderStyle::OUTSET => Some(NORMAL),
+            BorderStyle::HIDDEN => None,
+            BorderStyle::NONE => None,
+        }
+    }
 }
 
 /// applies the entire html namespace defined in dioxus-html
@@ -117,7 +199,9 @@ pub fn apply_attributes(
         "clip" => {}
 
         "color" => {
-            // text color
+            if let Ok(c) = value.parse() {
+                style.tui_style.fg.replace(c);
+            }
         }
 
         "column-count"
@@ -170,14 +254,11 @@ pub fn apply_attributes(
         | "font-weight" => apply_font(name, value, style),
 
         "height" => {
-            if value.ends_with("%") {
-                if let Ok(pct) = value.trim_end_matches("%").parse::<f32>() {
-                    style.style.size.height = Dimension::Percent(pct / 100.0);
-                }
-            } else if value.ends_with("px") {
-                if let Ok(px) = value.trim_end_matches("px").parse::<f32>() {
-                    style.style.size.height = Dimension::Points(px);
-                }
+            if let Some(v) = parse_value(value){
+                style.style.size.height = match v {
+                    UnitSystem::Percent(v)=> Dimension::Percent(v/100.0),
+                    UnitSystem::Point(v)=> Dimension::Points(v),
+                };
             }
         }
         "justify-content" => {
@@ -286,14 +367,11 @@ pub fn apply_attributes(
         "visibility" => {}
         "white-space" => {}
         "width" => {
-            if value.ends_with("%") {
-                if let Ok(pct) = value.trim_end_matches("%").parse::<f32>() {
-                    style.style.size.width = Dimension::Percent(pct / 100.0);
-                }
-            } else if value.ends_with("px") {
-                if let Ok(px) = value.trim_end_matches("px").parse::<f32>() {
-                    style.style.size.width = Dimension::Points(px);
-                }
+            if let Some(v) = parse_value(value){
+                style.style.size.width = match v {
+                    UnitSystem::Percent(v)=> Dimension::Percent(v/100.0),
+                    UnitSystem::Point(v)=> Dimension::Points(v),
+                };
             }
         }
         "word-break" => {}
@@ -304,7 +382,8 @@ pub fn apply_attributes(
     }
 }
 
-enum UnitSystem {
+#[derive(Clone, Copy)]
+pub enum UnitSystem {
     Percent(f32),
     Point(f32),
 }
@@ -316,8 +395,8 @@ fn parse_value(value: &str) -> Option<UnitSystem> {
         } else {
             None
         }
-    } else if value.ends_with("%") {
-        if let Ok(pct) = value.trim_end_matches("%").parse::<f32>() {
+    } else if value.ends_with('%') {
+        if let Ok(pct) = value.trim_end_matches('%').parse::<f32>() {
             Some(UnitSystem::Percent(pct))
         } else {
             None
@@ -344,7 +423,6 @@ fn apply_overflow(name: &str, value: &str, style: &mut StyleModifer) {
 }
 
 fn apply_display(_name: &str, value: &str, style: &mut StyleModifer) {
-    use stretch2::style::Display;
     style.style.display = match value {
         "flex" => Display::Flex,
         "block" => Display::None,
@@ -376,40 +454,9 @@ fn apply_display(_name: &str, value: &str, style: &mut StyleModifer) {
 fn apply_background(name: &str, value: &str, style: &mut StyleModifer) {
     match name {
         "background-color" => {
-            use tui::style::Color;
-            match value {
-                "red" => style.tui_style.bg.replace(Color::Red),
-                "green" => style.tui_style.bg.replace(Color::Green),
-                "blue" => style.tui_style.bg.replace(Color::Blue),
-                "yellow" => style.tui_style.bg.replace(Color::Yellow),
-                "cyan" => style.tui_style.bg.replace(Color::Cyan),
-                "magenta" => style.tui_style.bg.replace(Color::Magenta),
-                "white" => style.tui_style.bg.replace(Color::White),
-                "black" => style.tui_style.bg.replace(Color::Black),
-                _ => {
-                    if value.len() == 7 {
-                        let mut values = [0, 0, 0];
-                        let mut color_ok = true;
-                        for i in 0..values.len() {
-                            if let Ok(v) =
-                                u8::from_str_radix(&value[(1 + 2 * i)..(1 + 2 * (i + 1))], 16)
-                            {
-                                values[i] = v;
-                            } else {
-                                color_ok = false;
-                            }
-                        }
-                        if color_ok {
-                            let color = Color::Rgb(values[0], values[1], values[2]);
-                            style.tui_style.bg.replace(color)
-                        } else {
-                            None
-                        }
-                    } else {
-                        None
-                    }
-                }
-            };
+            if let Ok(c) = value.parse() {
+                style.tui_style.bg.replace(c);
+            }
         }
         "background" => {}
         "background-attachment" => {}
@@ -423,17 +470,71 @@ fn apply_background(name: &str, value: &str, style: &mut StyleModifer) {
     }
 }
 
-fn apply_border(name: &str, value: &str, _style: &mut StyleModifer) {
+fn apply_border(name: &str, value: &str, style: &mut StyleModifer) {
+    fn parse_border_style(v: &str) -> BorderStyle {
+        match v {
+            "dotted" => BorderStyle::DOTTED,
+            "dashed" => BorderStyle::DASHED,
+            "solid" => BorderStyle::SOLID,
+            "double" => BorderStyle::DOUBLE,
+            "groove" => BorderStyle::GROOVE,
+            "ridge" => BorderStyle::RIDGE,
+            "inset" => BorderStyle::INSET,
+            "outset" => BorderStyle::OUTSET,
+            "none" => BorderStyle::NONE,
+            "hidden" => BorderStyle::HIDDEN,
+            _ => todo!(),
+        }
+    }
     match name {
         "border" => {}
         "border-bottom" => {}
-        "border-bottom-color" => {}
-        "border-bottom-left-radius" => {}
-        "border-bottom-right-radius" => {}
-        "border-bottom-style" => {}
-        "border-bottom-width" => {}
+        "border-bottom-color" => {
+            if let Ok(c) = value.parse() {
+                style.tui_modifier.borders.bottom.color = Some(c);
+            }
+        }
+        "border-bottom-left-radius" => {
+            if let Some(v) = parse_value(value) {
+                style.tui_modifier.borders.left.radius = v;
+            }
+        }
+        "border-bottom-right-radius" => {
+            if let Some(v) = parse_value(value) {
+                style.tui_modifier.borders.right.radius = v;
+            }
+        }
+        "border-bottom-style" => {
+            style.tui_modifier.borders.bottom.style = parse_border_style(value)
+        }
+        "border-bottom-width" => {
+            if let Some(v) = parse_value(value) {
+                style.tui_modifier.borders.bottom.width = v;
+            }
+        }
         "border-collapse" => {}
-        "border-color" => {}
+        "border-color" => {
+            let values: Vec<_> = value.split(' ').collect();
+            if values.len() == 1 {
+                if let Ok(c) = values[0].parse() {
+                    style
+                        .tui_modifier
+                        .borders
+                        .slice()
+                        .iter_mut()
+                        .for_each(|b| b.color = Some(c));
+                }
+            } else {
+                for (v, b) in values
+                    .into_iter()
+                    .zip(style.tui_modifier.borders.slice().iter_mut())
+                {
+                    if let Ok(c) = v.parse() {
+                        b.color = Some(c);
+                    }
+                }
+            }
+        }
         "border-image" => {}
         "border-image-outset" => {}
         "border-image-repeat" => {}
@@ -441,28 +542,116 @@ fn apply_border(name: &str, value: &str, _style: &mut StyleModifer) {
         "border-image-source" => {}
         "border-image-width" => {}
         "border-left" => {}
-        "border-left-color" => {}
-        "border-left-style" => {}
-        "border-left-width" => {}
-        "border-radius" => {}
+        "border-left-color" => {
+            if let Ok(c) = value.parse() {
+                style.tui_modifier.borders.left.color = Some(c);
+            }
+        }
+        "border-left-style" => style.tui_modifier.borders.left.style = parse_border_style(value),
+        "border-left-width" => {
+            if let Some(v) = parse_value(value) {
+                style.tui_modifier.borders.left.width = v;
+            }
+        }
+        "border-radius" => {
+            let values: Vec<_> = value.split(' ').collect();
+            if values.len() == 1 {
+                if let Some(r) = parse_value(values[0]) {
+                    style
+                        .tui_modifier
+                        .borders
+                        .slice()
+                        .iter_mut()
+                        .for_each(|b| b.radius = r);
+                }
+            } else {
+                for (v, b) in values
+                    .into_iter()
+                    .zip(style.tui_modifier.borders.slice().iter_mut())
+                {
+                    if let Some(r) = parse_value(v) {
+                        b.radius = r;
+                    }
+                }
+            }
+        }
         "border-right" => {}
-        "border-right-color" => {}
-        "border-right-style" => {}
-        "border-right-width" => {}
+        "border-right-color" => {
+            if let Ok(c) = value.parse() {
+                style.tui_modifier.borders.right.color = Some(c);
+            }
+        }
+        "border-right-style" => style.tui_modifier.borders.right.style = parse_border_style(value),
+        "border-right-width" => {
+            if let Some(v) = parse_value(value) {
+                style.tui_modifier.borders.right.width = v;
+            }
+        }
         "border-spacing" => {}
-        "border-style" => {}
+        "border-style" => {
+            let values: Vec<_> = value.split(' ').collect();
+            if values.len() == 1 {
+                let border_style = parse_border_style(values[0]);
+                style
+                    .tui_modifier
+                    .borders
+                    .slice()
+                    .iter_mut()
+                    .for_each(|b| b.style = border_style);
+            } else {
+                for (v, b) in values
+                    .into_iter()
+                    .zip(style.tui_modifier.borders.slice().iter_mut())
+                {
+                    b.style = parse_border_style(v);
+                }
+            }
+        }
         "border-top" => {}
-        "border-top-color" => {}
-        "border-top-left-radius" => {}
-        "border-top-right-radius" => {}
-        "border-top-style" => {}
-        "border-top-width" => {}
+        "border-top-color" => {
+            if let Ok(c) = value.parse() {
+                style.tui_modifier.borders.top.color = Some(c);
+            }
+        }
+        "border-top-left-radius" => {
+            if let Some(v) = parse_value(value) {
+                style.tui_modifier.borders.left.radius = v;
+            }
+        }
+        "border-top-right-radius" => {
+            if let Some(v) = parse_value(value) {
+                style.tui_modifier.borders.right.radius = v;
+            }
+        }
+        "border-top-style" => style.tui_modifier.borders.top.style = parse_border_style(value),
+        "border-top-width" => {
+            if let Some(v) = parse_value(value) {
+                style.tui_modifier.borders.top.width = v;
+            }
+        }
         "border-width" => {
-            if let Ok(_px) = value.trim_end_matches("px").parse::<f32>() {
-                // tuistyle = px;
+            let values: Vec<_> = value.split(' ').collect();
+            if values.len() == 1 {
+                if let Some(w) = parse_value(values[0]) {
+                    style
+                        .tui_modifier
+                        .borders
+                        .slice()
+                        .iter_mut()
+                        .for_each(|b| b.width = w);
+                }
+            } else {
+                for (v, b) in values
+                    .into_iter()
+                    .zip(style.tui_modifier.borders.slice().iter_mut())
+                {
+                    if let Some(w) = parse_value(v) {
+                        b.width = w;
+                    }
+                }
             }
         }
-        _ => {}
+        _ => (),
     }
 }
 
@@ -516,14 +705,11 @@ fn apply_flex(name: &str, value: &str, style: &mut StyleModifer) {
             };
         }
         "flex-basis" => {
-            if value.ends_with("%") {
-                if let Ok(pct) = value.trim_end_matches("%").parse::<f32>() {
-                    style.style.flex_basis = Dimension::Percent(pct / 100.0);
-                }
-            } else if value.ends_with("px") {
-                if let Ok(px) = value.trim_end_matches("px").parse::<f32>() {
-                    style.style.flex_basis = Dimension::Points(px);
-                }
+            if let Some(v) = parse_value(value) {
+                style.style.flex_basis = match v {
+                    UnitSystem::Percent(v) => Dimension::Percent(v / 100.0),
+                    UnitSystem::Point(v) => Dimension::Points(v),
+                };
             }
         }
         "flex-flow" => {}
@@ -550,8 +736,27 @@ fn apply_flex(name: &str, value: &str, style: &mut StyleModifer) {
     }
 }
 
-fn apply_font(_name: &str, _value: &str, _style: &mut StyleModifer) {
-    todo!()
+fn apply_font(name: &str, value: &str, style: &mut StyleModifer) {
+    use tui::style::Modifier;
+    match name {
+        "font" => (),
+        "font-family" => (),
+        "font-size" => (),
+        "font-size-adjust" => (),
+        "font-stretch" => (),
+        "font-style" => match value {
+            "italic" => style.tui_style = style.tui_style.add_modifier(Modifier::ITALIC),
+            "oblique" => style.tui_style = style.tui_style.add_modifier(Modifier::ITALIC),
+            _ => (),
+        },
+        "font-variant" => todo!(),
+        "font-weight" => match value {
+            "bold" => style.tui_style = style.tui_style.add_modifier(Modifier::BOLD),
+            "normal" => style.tui_style = style.tui_style.remove_modifier(Modifier::BOLD),
+            _ => (),
+        },
+        _ => (),
+    }
 }
 
 fn apply_padding(name: &str, value: &str, style: &mut StyleModifer) {
@@ -587,8 +792,34 @@ fn apply_padding(name: &str, value: &str, style: &mut StyleModifer) {
     }
 }
 
-fn apply_text(_name: &str, _value: &str, _style: &mut StyleModifer) {
-    todo!()
+fn apply_text(name: &str, value: &str, style: &mut StyleModifer) {
+    use tui::style::Modifier;
+
+    match name {
+        "text-align" => todo!(),
+        "text-align-last" => todo!(),
+        "text-decoration" | "text-decoration-line" => {
+            for v in value.split(' ') {
+                match v {
+                    "line-through" => {
+                        style.tui_style = style.tui_style.add_modifier(Modifier::CROSSED_OUT)
+                    }
+                    "underline" => {
+                        style.tui_style = style.tui_style.add_modifier(Modifier::UNDERLINED)
+                    }
+                    _ => (),
+                }
+            }
+        }
+        "text-decoration-color" => todo!(),
+        "text-decoration-style" => todo!(),
+        "text-indent" => todo!(),
+        "text-justify" => todo!(),
+        "text-overflow" => todo!(),
+        "text-shadow" => todo!(),
+        "text-transform" => todo!(),
+        _ => todo!(),
+    }
 }
 
 fn apply_transform(_name: &str, _value: &str, _style: &mut StyleModifer) {

src/config.rs

@@ -0,0 +1,20 @@
+#[derive(Default, Clone, Copy)]
+pub struct Config {
+    pub rendering_mode: RenderingMode,
+}
+
+#[derive(Clone, Copy)]
+pub enum RenderingMode {
+    /// only 16 colors by accessed by name, no alpha support
+    BaseColors,
+    /// 8 bit colors, will be downsampled from rgb colors
+    Ansi,
+    /// 24 bit colors, most terminals support this
+    Rgb,
+}
+
+impl Default for RenderingMode {
+    fn default() -> Self {
+        RenderingMode::Rgb
+    }
+}

src/layout.rs

@@ -1,10 +1,10 @@
 use dioxus::core::*;
 use std::collections::HashMap;
-use tui::style::Style as TuiStyle;
 
 use crate::{
     attributes::{apply_attributes, StyleModifer},
-    TuiNode,
+    style::RinkStyle,
+    TuiModifier, TuiNode,
 };
 
 /*
@@ -41,7 +41,8 @@ pub fn collect_layout<'a>(
                 id,
                 TuiNode {
                     node,
-                    block_style: tui::style::Style::default(),
+                    block_style: RinkStyle::default(),
+                    tui_modifier: TuiModifier::default(),
                     layout: layout.new_node(style, &[]).unwrap(),
                 },
             );
@@ -50,7 +51,8 @@ pub fn collect_layout<'a>(
             // gather up all the styles from the attribute list
             let mut modifier = StyleModifer {
                 style: Style::default(),
-                tui_style: TuiStyle::default(),
+                tui_style: RinkStyle::default(),
+                tui_modifier: TuiModifier::default(),
             };
 
             for &Attribute { name, value, .. } in el.attributes {
@@ -86,6 +88,7 @@ pub fn collect_layout<'a>(
                 TuiNode {
                     node,
                     block_style: modifier.tui_style,
+                    tui_modifier: modifier.tui_modifier,
                     layout: layout.new_node(modifier.style, &child_layout).unwrap(),
                 },
             );

src/lib.rs

@@ -13,19 +13,28 @@ use std::{
     time::{Duration, Instant},
 };
 use stretch2::{prelude::Size, Stretch};
-use tui::{backend::CrosstermBackend, style::Style as TuiStyle, Terminal};
+use style::RinkStyle;
+use tui::{backend::CrosstermBackend, Terminal};
 
 mod attributes;
+mod config;
 mod hooks;
 mod layout;
 mod render;
+mod style;
+mod widget;
 
 pub use attributes::*;
+pub use config::*;
 pub use hooks::*;
 pub use layout::*;
 pub use render::*;
 
 pub fn launch(app: Component<()>) {
+    launch_cfg(app, Config::default())
+}
+
+pub fn launch_cfg(app: Component<()>, cfg: Config) {
     let mut dom = VirtualDom::new(app);
     let (tx, rx) = unbounded();
 
@@ -37,12 +46,13 @@ pub fn launch(app: Component<()>) {
 
     dom.rebuild();
 
-    render_vdom(&mut dom, tx, handler).unwrap();
+    render_vdom(&mut dom, tx, handler, cfg).unwrap();
 }
 
 pub struct TuiNode<'a> {
     pub layout: stretch2::node::Node,
-    pub block_style: TuiStyle,
+    pub block_style: RinkStyle,
+    pub tui_modifier: TuiModifier,
     pub node: &'a VNode<'a>,
 }
 
@@ -50,6 +60,7 @@ pub fn render_vdom(
     vdom: &mut VirtualDom,
     ctx: UnboundedSender<TermEvent>,
     handler: RinkInputHandler,
+    cfg: Config,
 ) -> Result<()> {
     // Setup input handling
     let (tx, mut rx) = unbounded();
@@ -132,7 +143,15 @@ pub fn render_vdom(
 
                     // resolve events before rendering
                     events = handler.get_events(vdom, &layout, &mut nodes, root_node);
-                    render::render_vnode(frame, &layout, &mut nodes, vdom, root_node);
+                    render::render_vnode(
+                        frame,
+                        &layout,
+                        &mut nodes,
+                        vdom,
+                        root_node,
+                        &RinkStyle::default(),
+                        cfg,
+                    );
                     assert!(nodes.is_empty());
                 })?;
 

src/render.rs

@@ -5,15 +5,15 @@ use stretch2::{
     prelude::{Layout, Size},
     Stretch,
 };
-use tui::{
-    backend::CrosstermBackend,
-    buffer::Buffer,
-    layout::Rect,
-    style::Style as TuiStyle,
-    widgets::{Block, Widget},
+use tui::{backend::CrosstermBackend, layout::Rect};
+
+use crate::{
+    style::{RinkColor, RinkStyle},
+    widget::{RinkBuffer, RinkCell, RinkWidget, WidgetWithContext},
+    BorderEdge, BorderStyle, Config, TuiNode, UnitSystem,
 };
 
-use crate::TuiNode;
+const RADIUS_MULTIPLIER: [f32; 2] = [1.0, 0.5];
 
 pub fn render_vnode<'a>(
     frame: &mut tui::Frame<CrosstermBackend<Stdout>>,
@@ -21,11 +21,14 @@ pub fn render_vnode<'a>(
     layouts: &mut HashMap<ElementId, TuiNode<'a>>,
     vdom: &'a VirtualDom,
     node: &'a VNode<'a>,
+    // this holds the accumulated syle state for styled text rendering
+    style: &RinkStyle,
+    cfg: Config,
 ) {
     match node {
         VNode::Fragment(f) => {
             for child in f.children {
-                render_vnode(frame, layout, layouts, vdom, child);
+                render_vnode(frame, layout, layouts, vdom, child, style, cfg);
             }
             return;
         }
@@ -33,7 +36,7 @@ pub fn render_vnode<'a>(
         VNode::Component(vcomp) => {
             let idx = vcomp.scope.get().unwrap();
             let new_node = vdom.get_scope(idx).unwrap().root_node();
-            render_vnode(frame, layout, layouts, vdom, new_node);
+            render_vnode(frame, layout, layouts, vdom, new_node, style, cfg);
             return;
         }
 
@@ -43,7 +46,7 @@ pub fn render_vnode<'a>(
     }
 
     let id = node.try_mounted_id().unwrap();
-    let node = layouts.remove(&id).unwrap();
+    let mut node = layouts.remove(&id).unwrap();
 
     let Layout { location, size, .. } = layout.layout(node.layout).unwrap();
 
@@ -55,37 +58,46 @@ pub fn render_vnode<'a>(
             #[derive(Default)]
             struct Label<'a> {
                 text: &'a str,
+                style: RinkStyle,
             }
 
-            impl<'a> Widget for Label<'a> {
-                fn render(self, area: Rect, buf: &mut Buffer) {
-                    buf.set_string(area.left(), area.top(), self.text, TuiStyle::default());
+            impl<'a> RinkWidget for Label<'a> {
+                fn render(self, area: Rect, mut buf: RinkBuffer) {
+                    for (i, c) in self.text.char_indices() {
+                        let mut new_cell = RinkCell::default();
+                        new_cell.set_style(self.style);
+                        new_cell.symbol = c.to_string();
+                        buf.set(area.left() + i as u16, area.top(), &new_cell);
+                    }
                 }
             }
 
-            // let s = Span::raw(t.text);
-
-            // Block::default().
-
-            let label = Label { text: t.text };
+            let label = Label {
+                text: t.text,
+                style: *style,
+            };
             let area = Rect::new(*x as u16, *y as u16, *width as u16, *height as u16);
 
             // the renderer will panic if a node is rendered out of range even if the size is zero
             if area.width > 0 && area.height > 0 {
-                frame.render_widget(label, area);
+                frame.render_widget(WidgetWithContext::new(label, cfg), area);
             }
         }
         VNode::Element(el) => {
-            let block = Block::default().style(node.block_style);
             let area = Rect::new(*x as u16, *y as u16, *width as u16, *height as u16);
 
+            let mut new_style = node.block_style.merge(*style);
+            node.block_style = new_style;
+
             // the renderer will panic if a node is rendered out of range even if the size is zero
             if area.width > 0 && area.height > 0 {
-                frame.render_widget(block, area);
+                frame.render_widget(WidgetWithContext::new(node, cfg), area);
             }
 
+            // do not pass background color to children
+            new_style.bg = None;
             for el in el.children {
-                render_vnode(frame, layout, layouts, vdom, el);
+                render_vnode(frame, layout, layouts, vdom, el, &new_style, cfg);
             }
         }
         VNode::Fragment(_) => todo!(),
@@ -93,3 +105,338 @@ pub fn render_vnode<'a>(
         VNode::Placeholder(_) => todo!(),
     }
 }
+
+impl<'a> RinkWidget for TuiNode<'a> {
+    fn render(self, area: Rect, mut buf: RinkBuffer<'_>) {
+        use tui::symbols::line::*;
+
+        enum Direction {
+            Left,
+            Right,
+            Up,
+            Down,
+        }
+
+        fn draw(
+            buf: &mut RinkBuffer,
+            points_history: [[i32; 2]; 3],
+            symbols: &Set,
+            pos: [u16; 2],
+            color: &Option<RinkColor>,
+        ) {
+            let [before, current, after] = points_history;
+            let start_dir = match [before[0] - current[0], before[1] - current[1]] {
+                [1, 0] => Direction::Right,
+                [-1, 0] => Direction::Left,
+                [0, 1] => Direction::Down,
+                [0, -1] => Direction::Up,
+                [a, b] => {
+                    panic!(
+                        "draw({:?} {:?} {:?}) {}, {} no cell adjacent",
+                        before, current, after, a, b
+                    )
+                }
+            };
+            let end_dir = match [after[0] - current[0], after[1] - current[1]] {
+                [1, 0] => Direction::Right,
+                [-1, 0] => Direction::Left,
+                [0, 1] => Direction::Down,
+                [0, -1] => Direction::Up,
+                [a, b] => {
+                    panic!(
+                        "draw({:?} {:?} {:?}) {}, {} no cell adjacent",
+                        before, current, after, a, b
+                    )
+                }
+            };
+
+            let mut new_cell = RinkCell::default();
+            if let Some(c) = color {
+                new_cell.fg = *c;
+            }
+            new_cell.symbol = match [start_dir, end_dir] {
+                [Direction::Down, Direction::Up] => symbols.vertical,
+                [Direction::Down, Direction::Right] => symbols.top_left,
+                [Direction::Down, Direction::Left] => symbols.top_right,
+                [Direction::Up, Direction::Down] => symbols.vertical,
+                [Direction::Up, Direction::Right] => symbols.bottom_left,
+                [Direction::Up, Direction::Left] => symbols.bottom_right,
+                [Direction::Right, Direction::Left] => symbols.horizontal,
+                [Direction::Right, Direction::Up] => symbols.bottom_left,
+                [Direction::Right, Direction::Down] => symbols.top_left,
+                [Direction::Left, Direction::Up] => symbols.bottom_right,
+                [Direction::Left, Direction::Right] => symbols.horizontal,
+                [Direction::Left, Direction::Down] => symbols.top_right,
+                _ => panic!(
+                    "{:?} {:?} {:?} cannont connect cell to itself",
+                    before, current, after
+                ),
+            }
+            .to_string();
+            buf.set(
+                (current[0] + pos[0] as i32) as u16,
+                (current[1] + pos[1] as i32) as u16,
+                &new_cell,
+            );
+        }
+
+        fn draw_arc(
+            pos: [u16; 2],
+            starting_angle: f32,
+            arc_angle: f32,
+            radius: f32,
+            symbols: &Set,
+            buf: &mut RinkBuffer,
+            color: &Option<RinkColor>,
+        ) {
+            if radius < 0.0 {
+                return;
+            }
+
+            let num_points = (radius * arc_angle) as i32;
+            let starting_point = [
+                (starting_angle.cos() * (radius * RADIUS_MULTIPLIER[0])) as i32,
+                (starting_angle.sin() * (radius * RADIUS_MULTIPLIER[1])) as i32,
+            ];
+            // keep track of the last 3 point to allow filling diagonals
+            let mut points_history = [
+                [0, 0],
+                {
+                    // change the x or y value based on which one is changing quicker
+                    let ddx = -starting_angle.sin();
+                    let ddy = starting_angle.cos();
+                    if ddx.abs() > ddy.abs() {
+                        [starting_point[0] - ddx.signum() as i32, starting_point[1]]
+                    } else {
+                        [starting_point[0], starting_point[1] - ddy.signum() as i32]
+                    }
+                },
+                starting_point,
+            ];
+
+            for i in 1..=num_points {
+                let angle = (i as f32 / num_points as f32) * arc_angle + starting_angle;
+                let x = angle.cos() * radius * RADIUS_MULTIPLIER[0];
+                let y = angle.sin() * radius * RADIUS_MULTIPLIER[1];
+                let new = [x as i32, y as i32];
+
+                if new != points_history[2] {
+                    points_history = [points_history[1], points_history[2], new];
+
+                    let dx = points_history[2][0] - points_history[1][0];
+                    let dy = points_history[2][1] - points_history[1][1];
+                    // fill diagonals
+                    if dx != 0 && dy != 0 {
+                        let connecting_point = match [dx, dy] {
+                            [1, 1] => [points_history[1][0] + 1, points_history[1][1]],
+                            [1, -1] => [points_history[1][0], points_history[1][1] - 1],
+                            [-1, 1] => [points_history[1][0], points_history[1][1] + 1],
+                            [-1, -1] => [points_history[1][0] - 1, points_history[1][1]],
+                            _ => todo!(),
+                        };
+                        draw(
+                            buf,
+                            [points_history[0], points_history[1], connecting_point],
+                            symbols,
+                            pos,
+                            color,
+                        );
+                        points_history = [points_history[1], connecting_point, points_history[2]];
+                    }
+
+                    draw(buf, points_history, symbols, pos, color);
+                }
+            }
+
+            points_history = [points_history[1], points_history[2], {
+                // change the x or y value based on which one is changing quicker
+                let ddx = -(starting_angle + arc_angle).sin();
+                let ddy = (starting_angle + arc_angle).cos();
+                if ddx.abs() > ddy.abs() {
+                    [
+                        points_history[2][0] + ddx.signum() as i32,
+                        points_history[2][1],
+                    ]
+                } else {
+                    [
+                        points_history[2][0],
+                        points_history[2][1] + ddy.signum() as i32,
+                    ]
+                }
+            }];
+
+            draw(buf, points_history, symbols, pos, color);
+        }
+
+        fn get_radius(border: &BorderEdge, area: Rect) -> f32 {
+            match border.style {
+                BorderStyle::HIDDEN => 0.0,
+                BorderStyle::NONE => 0.0,
+                _ => match border.radius {
+                    UnitSystem::Percent(p) => p * area.width as f32 / 100.0,
+                    UnitSystem::Point(p) => p,
+                }
+                .abs()
+                .min((area.width as f32 / RADIUS_MULTIPLIER[0]) / 2.0)
+                .min((area.height as f32 / RADIUS_MULTIPLIER[1]) / 2.0),
+            }
+        }
+
+        if area.area() == 0 {
+            return;
+        }
+
+        // todo: only render inside borders
+        for x in area.left()..area.right() {
+            for y in area.top()..area.bottom() {
+                let mut new_cell = RinkCell::default();
+                if let Some(c) = self.block_style.bg {
+                    new_cell.bg = c;
+                }
+                buf.set(x, y, &new_cell);
+            }
+        }
+
+        let borders = self.tui_modifier.borders;
+
+        let last_edge = &borders.left;
+        let current_edge = &borders.top;
+        if let Some(symbols) = current_edge.style.symbol_set() {
+            // the radius for the curve between this line and the next
+            let r = get_radius(current_edge, area);
+            let radius = [
+                (r * RADIUS_MULTIPLIER[0]) as u16,
+                (r * RADIUS_MULTIPLIER[1]) as u16,
+            ];
+            // the radius for the curve between this line and the last
+            let last_r = get_radius(last_edge, area);
+            let last_radius = [
+                (last_r * RADIUS_MULTIPLIER[0]) as u16,
+                (last_r * RADIUS_MULTIPLIER[1]) as u16,
+            ];
+            let color = current_edge.color.or(self.block_style.fg);
+            let mut new_cell = RinkCell::default();
+            if let Some(c) = color {
+                new_cell.fg = c;
+            }
+            for x in (area.left() + last_radius[0] + 1)..(area.right() - radius[0]) {
+                new_cell.symbol = symbols.horizontal.to_string();
+                buf.set(x, area.top(), &new_cell);
+            }
+            draw_arc(
+                [area.right() - radius[0] - 1, area.top() + radius[1]],
+                std::f32::consts::FRAC_PI_2 * 3.0,
+                std::f32::consts::FRAC_PI_2,
+                r,
+                &symbols,
+                &mut buf,
+                &color,
+            );
+        }
+
+        let last_edge = &borders.top;
+        let current_edge = &borders.right;
+        if let Some(symbols) = current_edge.style.symbol_set() {
+            // the radius for the curve between this line and the next
+            let r = get_radius(current_edge, area);
+            let radius = [
+                (r * RADIUS_MULTIPLIER[0]) as u16,
+                (r * RADIUS_MULTIPLIER[1]) as u16,
+            ];
+            // the radius for the curve between this line and the last
+            let last_r = get_radius(last_edge, area);
+            let last_radius = [
+                (last_r * RADIUS_MULTIPLIER[0]) as u16,
+                (last_r * RADIUS_MULTIPLIER[1]) as u16,
+            ];
+            let color = current_edge.color.or(self.block_style.fg);
+            let mut new_cell = RinkCell::default();
+            if let Some(c) = color {
+                new_cell.fg = c;
+            }
+            for y in (area.top() + last_radius[1] + 1)..(area.bottom() - radius[1]) {
+                new_cell.symbol = symbols.vertical.to_string();
+                buf.set(area.right() - 1, y, &new_cell);
+            }
+            draw_arc(
+                [area.right() - radius[0] - 1, area.bottom() - radius[1] - 1],
+                0.0,
+                std::f32::consts::FRAC_PI_2,
+                r,
+                &symbols,
+                &mut buf,
+                &color,
+            );
+        }
+
+        let last_edge = &borders.right;
+        let current_edge = &borders.bottom;
+        if let Some(symbols) = current_edge.style.symbol_set() {
+            // the radius for the curve between this line and the next
+            let r = get_radius(current_edge, area);
+            let radius = [
+                (r * RADIUS_MULTIPLIER[0]) as u16,
+                (r * RADIUS_MULTIPLIER[1]) as u16,
+            ];
+            // the radius for the curve between this line and the last
+            let last_r = get_radius(last_edge, area);
+            let last_radius = [
+                (last_r * RADIUS_MULTIPLIER[0]) as u16,
+                (last_r * RADIUS_MULTIPLIER[1]) as u16,
+            ];
+            let color = current_edge.color.or(self.block_style.fg);
+            let mut new_cell = RinkCell::default();
+            if let Some(c) = color {
+                new_cell.fg = c;
+            }
+            for x in (area.left() + radius[0])..(area.right() - last_radius[0] - 1) {
+                new_cell.symbol = symbols.horizontal.to_string();
+                buf.set(x, area.bottom() - 1, &new_cell);
+            }
+            draw_arc(
+                [area.left() + radius[0], area.bottom() - radius[1] - 1],
+                std::f32::consts::FRAC_PI_2,
+                std::f32::consts::FRAC_PI_2,
+                r,
+                &symbols,
+                &mut buf,
+                &color,
+            );
+        }
+
+        let last_edge = &borders.bottom;
+        let current_edge = &borders.left;
+        if let Some(symbols) = current_edge.style.symbol_set() {
+            // the radius for the curve between this line and the next
+            let r = get_radius(current_edge, area);
+            let radius = [
+                (r * RADIUS_MULTIPLIER[0]) as u16,
+                (r * RADIUS_MULTIPLIER[1]) as u16,
+            ];
+            // the radius for the curve between this line and the last
+            let last_r = get_radius(last_edge, area);
+            let last_radius = [
+                (last_r * RADIUS_MULTIPLIER[0]) as u16,
+                (last_r * RADIUS_MULTIPLIER[1]) as u16,
+            ];
+            let color = current_edge.color.or(self.block_style.fg);
+            let mut new_cell = RinkCell::default();
+            if let Some(c) = color {
+                new_cell.fg = c;
+            }
+            for y in (area.top() + radius[1])..(area.bottom() - last_radius[1] - 1) {
+                new_cell.symbol = symbols.vertical.to_string();
+                buf.set(area.left(), y, &new_cell);
+            }
+            draw_arc(
+                [area.left() + radius[0], area.top() + radius[1]],
+                std::f32::consts::PI,
+                std::f32::consts::FRAC_PI_2,
+                r,
+                &symbols,
+                &mut buf,
+                &color,
+            );
+        }
+    }
+}

src/style.rs

@@ -0,0 +1,447 @@
+use std::{num::ParseFloatError, str::FromStr};
+
+use tui::style::{Color, Modifier, Style};
+
+use crate::RenderingMode;
+
+#[derive(Clone, Copy, Debug)]
+pub struct RinkColor {
+    pub color: Color,
+    pub alpha: f32,
+}
+
+impl Default for RinkColor {
+    fn default() -> Self {
+        Self {
+            color: Color::Black,
+            alpha: 0.0,
+        }
+    }
+}
+
+impl RinkColor {
+    pub fn blend(self, other: Color) -> Color {
+        if self.color == Color::Reset {
+            Color::Reset
+        } else if self.alpha == 0.0 {
+            other
+        } else {
+            let [sr, sg, sb] = to_rgb(self.color);
+            let [or, og, ob] = to_rgb(other);
+            let (sr, sg, sb, sa) = (
+                sr as f32 / 255.0,
+                sg as f32 / 255.0,
+                sb as f32 / 255.0,
+                self.alpha,
+            );
+            let (or, og, ob) = (or as f32 / 255.0, og as f32 / 255.0, ob as f32 / 255.0);
+            Color::Rgb(
+                (255.0 * (sr * sa + or * (1.0 - sa))) as u8,
+                (255.0 * (sg * sa + og * (1.0 - sa))) as u8,
+                (255.0 * (sb * sa + ob * (1.0 - sa))) as u8,
+            )
+        }
+    }
+}
+
+fn parse_value(
+    v: &str,
+    current_max_output: f32,
+    required_max_output: f32,
+) -> Result<f32, ParseFloatError> {
+    if let Some(stripped) = v.strip_suffix('%') {
+        Ok((stripped.trim().parse::<f32>()? / 100.0) * required_max_output)
+    } else {
+        Ok((v.trim().parse::<f32>()? / current_max_output) * required_max_output)
+    }
+}
+
+pub struct ParseColorError;
+
+fn parse_hex(color: &str) -> Result<Color, ParseColorError> {
+    let mut values = [0, 0, 0];
+    let mut color_ok = true;
+    for i in 0..values.len() {
+        if let Ok(v) = u8::from_str_radix(&color[(1 + 2 * i)..(1 + 2 * (i + 1))], 16) {
+            values[i] = v;
+        } else {
+            color_ok = false;
+        }
+    }
+    if color_ok {
+        Ok(Color::Rgb(values[0], values[1], values[2]))
+    } else {
+        Err(ParseColorError)
+    }
+}
+
+fn parse_rgb(color: &str) -> Result<Color, ParseColorError> {
+    let mut values = [0, 0, 0];
+    let mut color_ok = true;
+    for (v, i) in color.split(',').zip(0..values.len()) {
+        if let Ok(v) = parse_value(v.trim(), 255.0, 255.0) {
+            values[i] = v as u8;
+        } else {
+            color_ok = false;
+        }
+    }
+    if color_ok {
+        Ok(Color::Rgb(values[0], values[1], values[2]))
+    } else {
+        Err(ParseColorError)
+    }
+}
+
+fn parse_hsl(color: &str) -> Result<Color, ParseColorError> {
+    let mut values = [0.0, 0.0, 0.0];
+    let mut color_ok = true;
+    for (v, i) in color.split(',').zip(0..values.len()) {
+        if let Ok(v) = parse_value(v.trim(), if i == 0 { 360.0 } else { 100.0 }, 1.0) {
+            values[i] = v;
+        } else {
+            color_ok = false;
+        }
+    }
+    if color_ok {
+        let [h, s, l] = values;
+        let rgb = if s == 0.0 {
+            [l as u8; 3]
+        } else {
+            fn hue_to_rgb(p: f32, q: f32, mut t: f32) -> f32 {
+                if t < 0.0 {
+                    t += 1.0;
+                }
+                if t > 1.0 {
+                    t -= 1.0;
+                }
+                if t < 1.0 / 6.0 {
+                    p + (q - p) * 6.0 * t
+                } else if t < 1.0 / 2.0 {
+                    q
+                } else if t < 2.0 / 3.0 {
+                    p + (q - p) * (2.0 / 3.0 - t) * 6.0
+                } else {
+                    p
+                }
+            }
+
+            let q = if l < 0.5 {
+                l * (1.0 + s)
+            } else {
+                l + s - l * s
+            };
+            let p = 2.0 * l - q;
+            [
+                (hue_to_rgb(p, q, h + 1.0 / 3.0) * 255.0) as u8,
+                (hue_to_rgb(p, q, h) * 255.0) as u8,
+                (hue_to_rgb(p, q, h - 1.0 / 3.0) * 255.0) as u8,
+            ]
+        };
+
+        Ok(Color::Rgb(rgb[0], rgb[1], rgb[2]))
+    } else {
+        Err(ParseColorError)
+    }
+}
+
+impl FromStr for RinkColor {
+    type Err = ParseColorError;
+
+    fn from_str(color: &str) -> Result<Self, Self::Err> {
+        match color {
+            "red" => Ok(RinkColor {
+                color: Color::Red,
+                alpha: 1.0,
+            }),
+            "black" => Ok(RinkColor {
+                color: Color::Black,
+                alpha: 1.0,
+            }),
+            "green" => Ok(RinkColor {
+                color: Color::Green,
+                alpha: 1.0,
+            }),
+            "yellow" => Ok(RinkColor {
+                color: Color::Yellow,
+                alpha: 1.0,
+            }),
+            "blue" => Ok(RinkColor {
+                color: Color::Blue,
+                alpha: 1.0,
+            }),
+            "magenta" => Ok(RinkColor {
+                color: Color::Magenta,
+                alpha: 1.0,
+            }),
+            "cyan" => Ok(RinkColor {
+                color: Color::Cyan,
+                alpha: 1.0,
+            }),
+            "gray" => Ok(RinkColor {
+                color: Color::Gray,
+                alpha: 1.0,
+            }),
+            "darkgray" => Ok(RinkColor {
+                color: Color::DarkGray,
+                alpha: 1.0,
+            }),
+            // light red does not exist
+            "orangered" => Ok(RinkColor {
+                color: Color::LightRed,
+                alpha: 1.0,
+            }),
+            "lightgreen" => Ok(RinkColor {
+                color: Color::LightGreen,
+                alpha: 1.0,
+            }),
+            "lightyellow" => Ok(RinkColor {
+                color: Color::LightYellow,
+                alpha: 1.0,
+            }),
+            "lightblue" => Ok(RinkColor {
+                color: Color::LightBlue,
+                alpha: 1.0,
+            }),
+            // light magenta does not exist
+            "orchid" => Ok(RinkColor {
+                color: Color::LightMagenta,
+                alpha: 1.0,
+            }),
+            "lightcyan" => Ok(RinkColor {
+                color: Color::LightCyan,
+                alpha: 1.0,
+            }),
+            "white" => Ok(RinkColor {
+                color: Color::White,
+                alpha: 1.0,
+            }),
+            _ => {
+                if color.len() == 7 && color.starts_with('#') {
+                    parse_hex(color).map(|c| RinkColor {
+                        color: c,
+                        alpha: 1.0,
+                    })
+                } else if let Some(stripped) = color.strip_prefix("rgb(") {
+                    let color_values = stripped.trim_end_matches(')');
+                    if color.matches(',').count() == 3 {
+                        let (alpha, rgb_values) =
+                            color_values.rsplit_once(',').ok_or(ParseColorError)?;
+                        if let Ok(a) = alpha.parse() {
+                            parse_rgb(rgb_values).map(|c| RinkColor { color: c, alpha: a })
+                        } else {
+                            Err(ParseColorError)
+                        }
+                    } else {
+                        parse_rgb(color_values).map(|c| RinkColor {
+                            color: c,
+                            alpha: 1.0,
+                        })
+                    }
+                } else if let Some(stripped) = color.strip_prefix("rgba(") {
+                    let color_values = stripped.trim_end_matches(')');
+                    if color.matches(',').count() == 3 {
+                        let (rgb_values, alpha) =
+                            color_values.rsplit_once(',').ok_or(ParseColorError)?;
+                        if let Ok(a) = parse_value(alpha, 1.0, 1.0) {
+                            parse_rgb(rgb_values).map(|c| RinkColor { color: c, alpha: a })
+                        } else {
+                            Err(ParseColorError)
+                        }
+                    } else {
+                        parse_rgb(color_values).map(|c| RinkColor {
+                            color: c,
+                            alpha: 1.0,
+                        })
+                    }
+                } else if let Some(stripped) = color.strip_prefix("hsl(") {
+                    let color_values = stripped.trim_end_matches(')');
+                    if color.matches(',').count() == 3 {
+                        let (rgb_values, alpha) =
+                            color_values.rsplit_once(',').ok_or(ParseColorError)?;
+                        if let Ok(a) = parse_value(alpha, 1.0, 1.0) {
+                            parse_hsl(rgb_values).map(|c| RinkColor { color: c, alpha: a })
+                        } else {
+                            Err(ParseColorError)
+                        }
+                    } else {
+                        parse_hsl(color_values).map(|c| RinkColor {
+                            color: c,
+                            alpha: 1.0,
+                        })
+                    }
+                } else if let Some(stripped) = color.strip_prefix("hsla(") {
+                    let color_values = stripped.trim_end_matches(')');
+                    if color.matches(',').count() == 3 {
+                        let (rgb_values, alpha) =
+                            color_values.rsplit_once(',').ok_or(ParseColorError)?;
+                        if let Ok(a) = parse_value(alpha, 1.0, 1.0) {
+                            parse_hsl(rgb_values).map(|c| RinkColor { color: c, alpha: a })
+                        } else {
+                            Err(ParseColorError)
+                        }
+                    } else {
+                        parse_hsl(color_values).map(|c| RinkColor {
+                            color: c,
+                            alpha: 1.0,
+                        })
+                    }
+                } else {
+                    Err(ParseColorError)
+                }
+            }
+        }
+    }
+}
+
+fn to_rgb(c: Color) -> [u8; 3] {
+    match c {
+        Color::Black => [0, 0, 0],
+        Color::Red => [255, 0, 0],
+        Color::Green => [0, 128, 0],
+        Color::Yellow => [255, 255, 0],
+        Color::Blue => [0, 0, 255],
+        Color::Magenta => [255, 0, 255],
+        Color::Cyan => [0, 255, 255],
+        Color::Gray => [128, 128, 128],
+        Color::DarkGray => [169, 169, 169],
+        Color::LightRed => [255, 69, 0],
+        Color::LightGreen => [144, 238, 144],
+        Color::LightYellow => [255, 255, 224],
+        Color::LightBlue => [173, 216, 230],
+        Color::LightMagenta => [218, 112, 214],
+        Color::LightCyan => [224, 255, 255],
+        Color::White => [255, 255, 255],
+        Color::Rgb(r, g, b) => [r, g, b],
+        Color::Indexed(idx) => match idx {
+            16..=231 => {
+                let v = idx - 16;
+                // add 3 to round up
+                let r = ((v as u16 / 36) * 255 + 3) / 5;
+                let g = (((v as u16 % 36) / 6) * 255 + 3) / 5;
+                let b = ((v as u16 % 6) * 255 + 3) / 5;
+                [r as u8, g as u8, b as u8]
+            }
+            232..=255 => {
+                let l = (idx - 232) / 24;
+                [l; 3]
+            }
+            // rink will never generate these colors, but they might be on the screen from another program
+            _ => [0, 0, 0],
+        },
+        Color::Reset => [0, 0, 0],
+    }
+}
+
+pub fn convert(mode: RenderingMode, c: Color) -> Color {
+    if let Color::Reset = c {
+        c
+    } else {
+        match mode {
+            crate::RenderingMode::BaseColors => match c {
+                Color::Rgb(_, _, _) => panic!("cannot convert rgb color to base color"),
+                Color::Indexed(_) => panic!("cannot convert Ansi color to base color"),
+                _ => c,
+            },
+            crate::RenderingMode::Rgb => {
+                let rgb = to_rgb(c);
+                Color::Rgb(rgb[0], rgb[1], rgb[2])
+            }
+            crate::RenderingMode::Ansi => match c {
+                Color::Indexed(_) => c,
+                _ => {
+                    let rgb = to_rgb(c);
+                    // 16-231: 6 × 6 × 6 color cube
+                    // 232-255: 23 step grayscale
+                    if rgb[0] == rgb[1] && rgb[1] == rgb[2] {
+                        let idx = 232 + (rgb[0] as u16 * 23 / 255) as u8;
+                        Color::Indexed(idx)
+                    } else {
+                        let r = (rgb[0] as u16 * 5) / 255;
+                        let g = (rgb[1] as u16 * 5) / 255;
+                        let b = (rgb[2] as u16 * 5) / 255;
+                        let idx = 16 + r * 36 + g * 6 + b;
+                        Color::Indexed(idx as u8)
+                    }
+                }
+            },
+        }
+    }
+}
+
+#[test]
+fn rgb_to_ansi() {
+    for idx in 17..=231 {
+        let idxed = Color::Indexed(idx);
+        let rgb = to_rgb(idxed);
+        // gray scale colors have two equivelent repersentations
+        let color = Color::Rgb(rgb[0], rgb[1], rgb[2]);
+        let converted = convert(RenderingMode::Ansi, color);
+        if let Color::Indexed(i) = converted {
+            if rgb[0] != rgb[1] || rgb[1] != rgb[2] {
+                assert_eq!(idxed, converted);
+            } else {
+                assert!(i >= 232);
+            }
+        } else {
+            panic!("color is not indexed")
+        }
+    }
+    for idx in 232..=255 {
+        let idxed = Color::Indexed(idx);
+        let rgb = to_rgb(idxed);
+        assert!(rgb[0] == rgb[1] && rgb[1] == rgb[2]);
+    }
+}
+
+#[derive(Clone, Copy)]
+pub struct RinkStyle {
+    pub fg: Option<RinkColor>,
+    pub bg: Option<RinkColor>,
+    pub add_modifier: Modifier,
+    pub sub_modifier: Modifier,
+}
+
+impl Default for RinkStyle {
+    fn default() -> Self {
+        Self {
+            fg: Some(RinkColor {
+                color: Color::White,
+                alpha: 1.0,
+            }),
+            bg: None,
+            add_modifier: Modifier::empty(),
+            sub_modifier: Modifier::empty(),
+        }
+    }
+}
+
+impl RinkStyle {
+    pub fn add_modifier(mut self, m: Modifier) -> Self {
+        self.sub_modifier.remove(m);
+        self.add_modifier.insert(m);
+        self
+    }
+
+    pub fn remove_modifier(mut self, m: Modifier) -> Self {
+        self.add_modifier.remove(m);
+        self.sub_modifier.insert(m);
+        self
+    }
+
+    pub fn merge(mut self, other: RinkStyle) -> Self {
+        self.fg = self.fg.or(other.fg);
+        self.add_modifier(other.add_modifier)
+            .remove_modifier(other.sub_modifier)
+    }
+}
+
+impl Into<Style> for RinkStyle {
+    fn into(self) -> Style {
+        Style {
+            fg: self.fg.map(|c| c.color),
+            bg: self.bg.map(|c| c.color),
+            add_modifier: self.add_modifier,
+            sub_modifier: self.sub_modifier,
+        }
+    }
+}

src/widget.rs

@@ -0,0 +1,96 @@
+use tui::{
+    buffer::Buffer,
+    layout::Rect,
+    style::{Color, Modifier},
+    widgets::Widget,
+};
+
+use crate::{
+    style::{convert, RinkColor, RinkStyle},
+    Config,
+};
+
+pub struct RinkBuffer<'a> {
+    buf: &'a mut Buffer,
+    cfg: Config,
+}
+
+impl<'a> RinkBuffer<'a> {
+    fn new(buf: &'a mut Buffer, cfg: Config) -> RinkBuffer<'a> {
+        Self { buf, cfg }
+    }
+
+    pub fn set(&mut self, x: u16, y: u16, new: &RinkCell) {
+        let mut cell = self.buf.get_mut(x, y);
+        cell.bg = convert(self.cfg.rendering_mode, new.bg.blend(cell.bg));
+        if new.symbol.is_empty() {
+            if !cell.symbol.is_empty() {
+                // allows text to "shine through" transparent backgrounds
+                cell.fg = convert(self.cfg.rendering_mode, new.bg.blend(cell.fg));
+            }
+        } else {
+            cell.modifier = new.modifier;
+            cell.symbol = new.symbol.clone();
+            cell.fg = convert(self.cfg.rendering_mode, new.fg.blend(cell.bg));
+        }
+    }
+}
+
+pub trait RinkWidget {
+    fn render(self, area: Rect, buf: RinkBuffer);
+}
+
+pub struct WidgetWithContext<T: RinkWidget> {
+    widget: T,
+    config: Config,
+}
+
+impl<T: RinkWidget> WidgetWithContext<T> {
+    pub fn new(widget: T, config: Config) -> WidgetWithContext<T> {
+        WidgetWithContext { widget, config }
+    }
+}
+
+impl<T: RinkWidget> Widget for WidgetWithContext<T> {
+    fn render(self, area: Rect, buf: &mut Buffer) {
+        self.widget.render(area, RinkBuffer::new(buf, self.config))
+    }
+}
+
+#[derive(Clone)]
+pub struct RinkCell {
+    pub symbol: String,
+    pub bg: RinkColor,
+    pub fg: RinkColor,
+    pub modifier: Modifier,
+}
+
+impl Default for RinkCell {
+    fn default() -> Self {
+        Self {
+            symbol: "".to_string(),
+            fg: RinkColor {
+                color: Color::Rgb(0, 0, 0),
+                alpha: 0.0,
+            },
+            bg: RinkColor {
+                color: Color::Rgb(0, 0, 0),
+                alpha: 0.0,
+            },
+            modifier: Modifier::empty(),
+        }
+    }
+}
+
+impl RinkCell {
+    pub fn set_style(&mut self, style: RinkStyle) {
+        if let Some(c) = style.fg {
+            self.fg = c;
+        }
+        if let Some(c) = style.bg {
+            self.bg = c;
+        }
+        self.modifier = style.add_modifier;
+        self.modifier.remove(style.sub_modifier);
+    }
+}