styling

src/app.rs

@@ -4,9 +4,7 @@ use crossterm::{
 };
 
 use crate::prelude::*;
-use crate::utils::{
-    clear, create_frame, flush, get_term_size, hide_cursor, render_to_frame, show_cursor,
-};
+use crate::utils::{clear, flush, get_term_size, hide_cursor, show_cursor, Frame};
 use std::{ffi::c_void, ptr::null, sync::mpsc};
 
 pub struct LArgs<'a> {
@@ -125,10 +123,10 @@ extern "C" fn cmd_loop(ptr: *mut c_void) -> *const c_void {
             }
             Command::Render => {
                 let (width, height) = get_term_size();
-                let mut frame: Vec<String> = create_frame(width, height);
-                render_to_frame(true, width, &mut frame, args.element);
+                let mut frame = Frame::new(width, height);
+                frame.render(true, args.element);
                 clear();
-                print!("{}", frame.join(""));
+                print!("{}", frame.output_nnl());
                 flush();
             }
         }

src/css.rs

@@ -1,6 +1,31 @@
 #[macro_export]
 macro_rules! __css {
     ($_style:expr,)=>{};
+    // percentage (n%)
+    (
+        $_style:expr, $name:ident: $value:literal% $(, $($other:tt)*)?
+    ) => {{
+        $_style.$name = Number::Pe($value);
+        $crate::__css!($_style, $($($other)*)?);
+    }};
+    (
+        $_style:expr, ($name:ident): $value:literal% $(, $($other:tt)*)?
+    ) => {{
+        $_style.other.insert(stringify!($name).to_string(), Box::new(
+            Number::Pe($value)
+        ));
+        $crate::__css!($_style, $($($other)*)?);
+    }};
+
+    // Number
+    (
+        $_style:expr, $name:ident: $value:literal $(, $($other:tt)*)?
+    ) => {{
+        $_style.$name = Number::Px($value);
+        $crate::__css!($_style, $($($other)*)?);
+    }};
+
+    // Normal
     (
         $_style:expr, $name:ident: $value:expr $(, $($other:tt)*)?
     ) => {{

src/examples.rs

@@ -2,10 +2,21 @@ use crate::prelude::*;
 
 pub fn event_logger() -> Element {
     rsx! {
-        id: "root",
-        text { on_event: Handler::new(|_, _, document| {
-            let root = document.get_element_by_id::<Div>("root").unwrap();
-            root.children.add_child(rsx_elem!( text { "Ok" } ));
-        }), id: "txt", "current event: None" }
+        styling: Some(styling()),
+        button { class: "txt", "Hello, World!" }
+    }
+}
+
+pub fn styling() -> Css {
+    css! {
+        .txt {
+            x: Center,
+            y: Center,
+            color: Red,
+        }
+        
+        .txt: clicked {
+            color: Blue,
+        }
     }
 }

src/lib.rs

@@ -43,6 +43,7 @@ pub use app::run;
 /// the UI framework easier to use.
 pub mod prelude {
     pub use crate::ui::Color::*;
+    pub use crate::ui::Number::*;
     pub use crate::{self as osui, css, rsx, rsx_elem, ui::*, Handler};
     pub use crate::{style, Command, Document, Element, Value};
     // useful for Element making
@@ -88,6 +89,11 @@ impl<T: Copy + PartialEq + Default> Default for Value<T> {
 /// ElementCore Traits
 //////////////////////////////////////////////////////////////////////////////////////////////////
 
+/// ```
+/// RenderResult(output, (x, y), (width, height))
+/// ```
+pub struct RenderResult(String, (ui::Number, ui::Number));
+
 pub trait ElementCore: Send + Sync {
     fn get_data(&self) -> (Value<usize>, usize, String);
     fn update_data(&mut self, width: usize, height: usize);
@@ -97,10 +103,7 @@ pub trait ElementCore: Send + Sync {
 }
 
 pub trait ElementWidget: ElementCore + std::fmt::Debug {
-    fn render(&self, focused: bool) -> String {
-        _ = focused;
-        String::new()
-    }
+    fn render(&self, focused: bool) -> RenderResult;
 
     fn event(&mut self, event: Event, document: &Document) {
         _ = (event, document)

src/ui/mod.rs

@@ -5,7 +5,7 @@
 pub mod styles;
 pub use styles::*;
 
-use crate::prelude::*;
+use crate::{prelude::*, RenderResult};
 use osui_element::{elem_fn, element};
 
 /// The `Text` element represents a piece of static text in the terminal UI.
@@ -31,12 +31,17 @@ pub struct Text {
 }
 
 impl ElementWidget for Text<'_> {
-    fn render(&self, _: bool) -> String {
-        if let Children::Text(text) = &self.children {
-            text.clone()
-        } else {
-            String::new()
-        }
+    fn render(&self, _: bool) -> RenderResult {
+        self.style.result(
+            "",
+            self.style.write("", &{
+                if let Children::Text(text) = &self.children {
+                    text.clone()
+                } else {
+                    String::new()
+                }
+            }),
+        )
     }
     fn event(&mut self, event: Event, document: &Document) {
         call!(self.on_event(event, document));
@@ -71,21 +76,16 @@ pub struct Div {
 }
 
 impl ElementWidget for Div<'_> {
-    fn render(&self, focused: bool) -> String {
-        let mut frame = crate::utils::create_frame(self.width.get_value(), self.height.get_value());
+    fn render(&self, focused: bool) -> RenderResult {
+        let mut frame = crate::utils::Frame::new(crate::utils::get_term_size().0, 12);
 
         if let Children::Children(children, child) = &self.children {
             for (i, elem) in children.iter().enumerate() {
-                crate::utils::render_to_frame(
-                    focused && i == *child,
-                    self.width.get_value(),
-                    &mut frame,
-                    elem,
-                );
+                frame.render(focused && i == *child, elem);
             }
         }
 
-        frame.join("\n")
+        self.style.result("", frame.output())
     }
 
     fn event(&mut self, event: Event, document: &Document) {
@@ -149,14 +149,20 @@ pub struct Button {
 }
 
 impl ElementWidget for Button<'_> {
-    fn render(&self, focused: bool) -> String {
-        if self.state == "clicked" {
-            return self.style.write("clicked", &self.children.get_text());
-        }
-        if focused {
-            self.style.write("hover", &self.children.get_text())
+    fn render(&self, focused: bool) -> RenderResult {
+        if self.state != "" {
+            self.style.result(
+                self.state,
+                self.style.write(self.state, &self.children.get_text()),
+            )
+        } else if focused {
+            self.style.result(
+                "hover",
+                self.style.write("hover", &self.children.get_text()),
+            )
         } else {
-            self.style.write("", &self.children.get_text())
+            self.style
+                .result("", self.style.write("", &self.children.get_text()))
         }
     }
 

src/ui/styles.rs

@@ -6,9 +6,12 @@ use std::{collections::HashMap, fmt::Debug};
 
 use dyn_clone::{clone_trait_object, DynClone};
 
+use crate::RenderResult;
+
 pub trait StyleCore: Debug + Send + Sync + DynClone {
     fn ansi(&self) -> String;
     fn ansi_bg(&self) -> String;
+    fn is_null(&self) -> bool;
 }
 
 clone_trait_object!(StyleCore);
@@ -45,6 +48,9 @@ impl StyleCore for Font {
     fn ansi_bg(&self) -> String {
         self.ansi()
     }
+    fn is_null(&self) -> bool {
+        *self == Self::None
+    }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
@@ -104,6 +110,9 @@ impl StyleCore for Color {
             Color::White => "\x1b[47m",
         })
     }
+    fn is_null(&self) -> bool {
+        *self == Self::NoColor
+    }
 }
 
 impl Default for Color {
@@ -144,6 +153,15 @@ fn hex_to_rgb(hex: &str) -> (u8, u8, u8) {
     (r, g, b)
 }
 
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum Number {
+    Px(usize),
+    Pe(usize),
+    Center,
+    Auto,
+    Default,
+}
+
 #[derive(PartialEq, Eq, Hash, Debug, Clone)]
 pub enum StyleName {
     Class(String),
@@ -154,6 +172,12 @@ pub enum StyleName {
 #[derive(Debug, Clone)]
 pub struct StyleElement {
     pub color: Color,
+    pub background: Color,
+    pub font: Font,
+    pub x: Number,
+    pub y: Number,
+    pub width: Number,
+    pub height: Number,
     pub other: HashMap<String, Box<dyn StyleCore>>,
 }
 
@@ -161,11 +185,44 @@ impl Default for StyleElement {
     fn default() -> Self {
         StyleElement {
             color: Color::NoColor,
+            background: Color::NoColor,
+            font: Font::None,
+            x: Number::Default,
+            y: Number::Default,
+            width: Number::Default,
+            height: Number::Default,
             other: HashMap::new(),
         }
     }
 }
 
+impl StyleElement {
+    pub fn prioritize(mut self, other: &Self) -> StyleElement {
+        if !other.color.is_null() {
+            self.color = other.color.clone();
+        }
+        if !other.background.is_null() {
+            self.background = other.background.clone();
+        }
+        if !other.font.is_null() {
+            self.font = other.font.clone();
+        }
+        if other.x != Number::Default {
+            self.x = other.x.clone();
+        }
+        if other.y != Number::Default {
+            self.y = other.y.clone();
+        }
+        if other.width != Number::Default {
+            self.width = other.width.clone();
+        }
+        if other.height != Number::Default {
+            self.height = other.height.clone();
+        }
+        self
+    }
+}
+
 #[derive(Debug, Clone)]
 pub struct Style(pub StyleElement, pub HashMap<String, StyleElement>);
 
@@ -177,20 +234,30 @@ impl Default for Style {
 
 impl Style {
     pub fn write(&self, state: &str, s: &str) -> String {
-        if state == "" {
-            return self.0.write(s);
-        }
         if let Some(style_element) = self.1.get(state) {
             style_element.write(s)
         } else {
-            s.to_string()
+            return self.0.write(s);
+        }
+    }
+    pub fn result(&self, state: &str, s: String) -> RenderResult {
+        if let Some(style_element) = self.1.get(state) {
+            let style_element = self.0.clone().prioritize(&style_element.clone());
+            RenderResult(s, (style_element.x.clone(), style_element.y.clone()))
+        } else {
+            RenderResult(s, (self.0.x.clone(), self.0.y.clone()))
         }
     }
 }
 
 impl StyleElement {
     pub fn write(&self, s: &str) -> String {
-        format!("{}{s}\x1b[0m", self.color.ansi())
+        format!(
+            "{}{}{}{s}\x1b[0m",
+            self.color.ansi(),
+            self.background.ansi_bg(),
+            self.font.ansi()
+        )
     }
 }
 

src/utils.rs

@@ -5,11 +5,10 @@
 /// # Example
 /// ```rust
 /// use crate::ui::utils::{create_frame, render_to_frame};
-/// 
+///
 /// let frame = create_frame(50, 10);
 /// render_to_frame(crate::State::Normal, 50, &mut frame, &text_element);
 /// ```
-
 use crate::{Element, Value};
 use lazy_static::lazy_static;
 use regex::Regex;
@@ -49,7 +48,7 @@ pub fn compress_string(input: &str, re: &Regex) -> (String, HashMap<usize, Strin
 }
 
 /// Merges a frame withe a line by x
-fn merge_line(frame_: &str, line_: &str, x: usize) -> String {
+fn merge_line(frame_: &str, line_: &str, x: usize) -> (String, String) {
     let (frame_, fm) = compress_string(frame_, &ANSI);
     let (mut line_, lm) = compress_string(line_, &ANSI);
 
@@ -82,35 +81,86 @@ fn merge_line(frame_: &str, line_: &str, x: usize) -> String {
         }
     }
 
-    res
+    (res, line_)
 }
 
-/// Render to a frame
-pub fn render_to_frame(
-    focused: bool,
+pub struct Frame {
+    frame: Vec<String>,
     width: usize,
-    frame: &mut Vec<String>,
-    element: &Element,
-) {
-    let data = element.get_data();
-    for (i, line) in element.render(focused).split('\n').enumerate() {
-        if (data.1 + i) < frame.len() {
-            let frame_line = frame.get_mut(data.1 + i).unwrap();
-            match data.0 {
-                Value::Custom(x) => {
-                    *frame_line = merge_line(&frame_line, line, x);
+    used: Vec<usize>,
+}
+
+impl Frame {
+    pub fn new(width: usize, height: usize) -> Self {
+        Self {
+            frame: vec![" ".repeat(width); height],
+            width,
+            used: vec![0; height],
+        }
+    }
+    pub fn render(&mut self, focused: bool, element: &Element) {
+        // let data = element.get_data();
+        let output = element.render(focused);
+        let x;
+        let mut y = 0;
+        match output.1 .1 {
+            crate::ui::Number::Px(_y) => {
+                y = _y;
+            }
+            crate::ui::Number::Pe(p) => y = (self.frame.len() * p) / 100,
+            crate::ui::Number::Center => {
+                y = (self.frame.len() - output.0.matches('\n').count() + 1) / 2
+            }
+            crate::ui::Number::Auto => {
+                for (i, n) in self.used.iter().enumerate() {
+                    if *n == 0 {
+                        y = i;
+                        break;
+                    }
                 }
-                _ => {
-                    for (x, c) in frame_line.chars().rev().enumerate() {
-                        if c != ' ' {
-                            *frame_line = merge_line(&frame_line, line, width - x);
-                            return;
-                        }
+            }
+            crate::ui::Number::Default => {
+                for (i, n) in self.used.iter().enumerate() {
+                    if *n == 0 {
+                        y = i;
+                        break;
                     }
-                    *frame_line = merge_line(&frame_line, line, 0);
                 }
             }
         }
+        match output.1 .0 {
+            crate::ui::Number::Px(_x) => {
+                x = _x;
+            }
+            crate::ui::Number::Pe(p) => x = (self.width * p) / 100,
+            crate::ui::Number::Center => {
+                x = (self.width
+                    - ANSI
+                        .replace_all(&output.0.lines().next().unwrap_or(""), "")
+                        .len())
+                    / 2;
+            }
+            crate::ui::Number::Auto => {
+                x = *self.used.get(y).unwrap();
+            }
+            crate::ui::Number::Default => {
+                x = 0;
+            }
+        }
+        for (i, line) in output.0.split('\n').enumerate() {
+            if self.frame.len() > y + i {
+                let frame_line = self.frame.get_mut(y + i).unwrap();
+                let merged = merge_line(&frame_line, line, x);
+                *frame_line = merged.0;
+                *self.used.get_mut(y + i).unwrap() += merged.1.len() - 1;
+            }
+        }
+    }
+    pub fn output(&self) -> String {
+        self.frame.join("\n")
+    }
+    pub fn output_nnl(&self) -> String {
+        self.frame.join("")
     }
 }
 
@@ -180,10 +230,6 @@ pub fn closest_component(
         .unwrap_or(current_index) // If no component is found, return the current index
 }
 
-pub fn create_frame(width: usize, height: usize) -> Vec<String> {
-    vec![" ".repeat(width); height]
-}
-
 pub fn get_term_size() -> (usize, usize) {
     let (width, height) = crossterm::terminal::size().unwrap();
     (width as usize, height as usize)

styling.md

@@ -6,4 +6,4 @@
 
 `x`, `y`: `n`, `n%`, `center`, `auto`;
 
-`display`: `row`, `column`, `overlap`;
+<!-- `display`: `row`, `column`, `overlap`; -->