Refactored framing and fixed the issues w/ composition

src/display/body.rs

@@ -3,7 +3,10 @@ use std::io::{Stdout, Write};
 use termion::{clear, cursor, raw::RawTerminal};
 
 use super::{
-    frame::Frame, theme::ColorSet, Environment, Event, Page,
+    compose::{Component, Components},
+    frame::Frame,
+    theme::ColorSet,
+    Environment, Event, Page,
 };
 
 type Result<T> = std::result::Result<T, anyhow::Error>;
@@ -25,8 +28,10 @@ impl Body {
             screen,
             "{theme}{content}",
             theme = env.theme.primary(),
-            content =
-                env.frame.writeln(&format!("Event: {}", event), 0, 0),
+            content = env
+                .frame
+                .writeln(&format!("Event: {}", event), 0, 0)
+                .concat_for(&env.frame),
         )?;
         screen.flush()?;
         Ok(())
@@ -42,7 +47,7 @@ impl Body {
             "{hide}{clear}{fr}{cursor}",
             clear = clear::All,
             hide = cursor::Hide,
-            fr = env.frame.frame_str(env.theme.primary()),
+            fr = env.frame.frame_str(env.theme.colors.primary),
             cursor = env.frame.goto(0, 0),
         )?;
         screen.flush()?;
@@ -98,7 +103,11 @@ impl Default for SigninCursorLocation {
 
 impl SigninPage {
     #[inline]
-    fn draw(&self, highlight: ColorSet, normal: ColorSet) -> String {
+    fn draw(
+        &self,
+        highlight: ColorSet,
+        normal: ColorSet,
+    ) -> Components {
         const HEADER_Y: u16 = 1;
         const HOSTNAME_Y: u16 = 3;
         const OK_Y: u16 = 5;
@@ -106,21 +115,27 @@ impl SigninPage {
         let fr_width = frame.size().0;
         let total_width = fr_width / 3;
 
-        format!(
-            "{header}{hostname}{retheme}{ok}",
-            header = frame.write_centered("login kk", HEADER_Y),
-            hostname = frame.write_centered(
-                &self.field_str(
-                    highlight,
-                    total_width,
-                    "hostname",
-                    "",
-                ),
-                HOSTNAME_Y,
-            ),
-            retheme = normal.to_string(),
-            ok = frame.write_centered("[ok]", OK_Y),
-        )
+        todo!()
+        // frame
+        //     .write_centered("login kk", HEADER_Y)
+        //     .into_iter()
+        //     .chain(
+        //         frame
+        //             .write_centered(
+        //                 &self.field_str(
+        //                     highlight,
+        //                     total_width,
+        //                     "hostname",
+        //                     "",
+        //                 ),
+        //                 HOSTNAME_Y,
+        //             )
+        //             .into_iter(),
+        //     )
+        //     .chain(vec![Component::Theme(normal)].into_iter())
+        //     .chain(frame.write_centered("[ok]", OK_Y).into_iter())
+        //     .collect::<Vec<Component>>()
+        //     .into()
     }
 
     #[inline]
@@ -176,16 +191,17 @@ impl Page for SigninPage {
             "{theme}{clear}{frame}{subframe}{content}{hide_cursor}",
             theme = env.theme.frame(),
             clear = clear::All,
-            frame = env.frame.frame_str(env.theme.primary()),
+            frame = env.frame.frame_str(env.theme.colors.primary),
             subframe = self
                 .frame
                 .unwrap()
-                .frame_str(env.theme.colors.subwin.to_string()),
+                .frame_str(env.theme.colors.subwin),
             hide_cursor = cursor::Hide,
-            content = self.draw(
-                env.theme.colors.highlight,
-                env.theme.colors.subwin
-            ),
+            content = "",
+            // content = self.draw(
+            //     env.theme.colors.highlight,
+            //     env.theme.colors.subwin
+            // ),
         )?;
         screen.flush()?;
 

src/display/compose.rs

@@ -1,4 +1,8 @@
-use std::ops::Deref;
+use std::{
+    iter::Map,
+    ops::{Deref, Range},
+    vec::IntoIter,
+};
 
 use super::{frame::Frame, theme::ColorSet};
 
@@ -7,22 +11,31 @@ pub enum Component {
     String(String),
     Goto(u16, u16),
     Theme(ColorSet),
+    Padding(u16),
+    // Pre-formatted
+    Internal(String),
+    Repeated(char, u16),
     Clear,
 }
 
 impl Component {
-    pub fn prepare_for(&self, frame: &Frame) -> String {
+    pub fn prepare_for(self, frame: &Frame) -> String {
         match self {
-            Component::String(s) => s.to_owned(),
-            Component::Goto(x, y) => frame.goto(*x, *y),
+            Component::String(s) => s,
+            Component::Goto(x, y) => frame.goto(x, y),
             Component::Theme(c) => c.to_string(),
             Component::Clear => termion::clear::All.to_string(),
+            Component::Padding(len) => " ".repeat(len as usize),
+            Component::Internal(i) => i,
+            Component::Repeated(ch, len) => {
+                ch.to_string().repeat(len as usize)
+            }
         }
     }
 }
 
 #[derive(Clone, Debug)]
-pub struct Components(Vec<Component>);
+pub struct Components(pub Vec<Component>);
 
 impl Deref for Components {
     type Target = Vec<Component>;
@@ -46,13 +59,16 @@ impl From<Component> for Components {
 
 impl Components {
     pub fn str_len(&self) -> u16 {
-        let mut len_cnt: u16 = 0;
-        for elem in &self.0 {
-            if let Component::String(s) = elem {
-                len_cnt += s.len() as u16;
-            }
-        }
-        len_cnt
+        (&self.0)
+            .into_iter()
+            .map(|comp| {
+                if let Component::String(s) = comp {
+                    s.len() as u16
+                } else {
+                    0
+                }
+            })
+            .sum()
     }
 
     pub fn concat_for(self, frame: &Frame) -> String {
@@ -61,4 +77,8 @@ impl Components {
             .map(|component| component.prepare_for(frame))
             .collect::<String>()
     }
+
+    pub fn push(&mut self, comp: Component) {
+        self.0.push(comp)
+    }
 }

src/display/frame.rs

@@ -1,9 +1,16 @@
 use termion::{clear, cursor, raw::RawTerminal};
 
 const ESTIMATED_FRAME_BIT_SIZE: usize = 11;
-use std::io::{Stdout, Write};
+use std::{
+    io::{Stdout, Write},
+    slice::Iter,
+    vec::IntoIter,
+};
 
-use super::theme::{ColorSet, Theme};
+use super::{
+    compose::{Component, Components},
+    theme::{ColorSet, Theme},
+};
 
 const FRAME_CHAR_HORIZONTAL: char = ' ';
 const FRAME_CHAR_VERTICAL: char = ' ';
@@ -40,7 +47,7 @@ impl Frame {
 
     #[inline(always)]
     pub fn goto(&self, x: u16, y: u16) -> String {
-        let cg = cursor::Goto(
+        cursor::Goto(
             self.border.max(
                 (self.border + self.start.0 + x)
                     .min(self.end.0 - self.border),
@@ -49,76 +56,91 @@ impl Frame {
                 (self.border + self.start.1 + y)
                     .min(self.end.1 - self.border),
             ),
-        );
-        cg.into()
-    }
-
-    #[inline(always)]
-    fn goto_internal(&self, x: u16, y: u16) -> String {
-        cursor::Goto(
-            (self.start.0 + x).min(self.end.0),
-            (self.start.1 + y).min(self.end.1),
         )
         .into()
     }
 
     #[inline(always)]
-    fn write_centered_clear(&self, s: &str) -> String {
-        let width = self.size().0 as usize;
-        let limit = width - self.border as usize * 2;
-        let s = if s.len() > limit { &s[..limit] } else { s };
-        let len = s.len();
-        let base_size = ((width - len) / 2) - self.border as usize;
-        format!(
-            "{left}{line}{right}",
-            left = " ".repeat(base_size + ((width - len) % 2)),
-            line = s,
-            right = " ".repeat(base_size)
+    fn goto_internal(&self, x: u16, y: u16) -> Component {
+        Component::Internal(
+            cursor::Goto(
+                (self.start.0 + x).min(self.end.0),
+                (self.start.1 + y).min(self.end.1),
+            )
+            .into(),
         )
+        .into()
     }
 
     #[inline(always)]
-    fn write_frame_line(&self, y: u16, length: u16) -> String {
-        self.goto_internal(0, y)
-            + &FRAME_CHAR_HORIZONTAL
-                .to_string()
-                .repeat(length as usize)
+    fn write_centered_clear(&self, s: &str) -> Components {
+        let width = self.size().0;
+        let limit = width - self.border * 2;
+        let s = if s.len() > limit as usize {
+            &s[..limit as usize]
+        } else {
+            s
+        };
+        let len = s.len() as u16;
+        let base_size = ((width - len) / 2) - self.border;
+        vec![
+            Component::Padding(base_size + ((width - len) % 2)),
+            Component::String(s.into()),
+            Component::Padding(base_size),
+        ]
+        .into()
     }
 
     #[inline(always)]
-    fn write_clear_to_end(&self, s: &str) -> String {
+    fn write_frame_line(&self, y: u16, length: u16) -> Components {
+        vec![
+            self.goto_internal(0, y),
+            Component::Repeated(FRAME_CHAR_HORIZONTAL, length),
+        ]
+        .into()
+    }
+
+    #[inline(always)]
+    fn write_clear_to_end(&self, s: &str) -> Components {
         let limit = (self.size().0 - self.border * 2) as usize;
         let s = if s.len() > limit { &s[..limit] } else { s };
-        let clear_length = self.size().0 as usize
-            - s.len()
-            - (self.border * 2) as usize;
-        format!("{}{}", s, " ".repeat(clear_length))
+        vec![
+            Component::String(s.into()),
+            Component::Padding(
+                self.size().0 - s.len() as u16 - (self.border * 2),
+            ),
+        ]
+        .into()
     }
 
-    pub fn writeln(&self, s: &str, x: u16, y: u16) -> String {
-        let words = s.split('\n').collect::<Vec<&str>>();
-        let mut out_words = Vec::with_capacity(words.len());
-        for i in 0..words.len() {
-            out_words.push(format!(
-                "{ret}{str}",
-                str = self.write_clear_to_end(words[i]),
-                ret = self.goto(x, y + i as u16),
-            ));
-        }
-        out_words.concat()
+    pub fn writeln(&self, s: &str, x: u16, y: u16) -> Components {
+        let mut index: u16 = 0;
+        s.split('\n')
+            .flat_map(|wrd| {
+                index += 1;
+                vec![
+                    vec![Component::Goto(x, y + index - 1)],
+                    self.write_clear_to_end(wrd).0,
+                ]
+            })
+            .flatten()
+            .collect::<Vec<Component>>()
+            .into()
     }
 
-    pub fn write_centered(&self, s: &str, y: u16) -> String {
-        let words = s.split('\n').collect::<Vec<&str>>();
-        let mut out_words = Vec::with_capacity(words.len());
-        for i in 0..words.len() {
-            out_words.push(format!(
-                "{ret}{str}",
-                ret = self.goto(0, y + i as u16),
-                str = self.write_centered_clear(words[i]),
-            ));
-        }
-        out_words.concat()
+    pub fn write_centered(&self, s: &str, y: u16) -> Components {
+        let mut index: u16 = 0;
+        s.split('\n')
+            .flat_map(|wrd| {
+                index += 1;
+                vec![
+                    vec![Component::Goto(0, y + index - 1)],
+                    self.write_centered_clear(wrd).0,
+                ]
+            })
+            .flatten()
+            .collect::<Vec<Component>>()
+            .into()
     }
 
     #[inline(always)]
@@ -203,42 +225,73 @@ impl Frame {
         frame
     }
 
-    pub fn frame_str(&self, body_theme: String) -> String {
-        if self.border == 0 {
-            return body_theme + &clear::All.to_string();
-        }
-        self.goto_internal(0, 0);
-        let (w_len, h_len) = self.size();
-        let width_str = FRAME_CHAR_HORIZONTAL
-            .to_string()
-            .repeat(w_len as usize + 1);
-        let mut frame = Vec::with_capacity(h_len as usize + 4);
-        let frame_theme = self.theme.to_string();
-        let body_clear =
-            body_theme.clone() + &" ".repeat(w_len as usize);
-        frame.push(self.theme.to_string());
+    pub fn frame_str(&self, body_theme: ColorSet) -> String {
+        self.compose(body_theme).concat_for(self)
+    }
 
-        for y in 0..self.border {
-            frame.push(self.write_frame_line(y, w_len));
+    // compose generates a collection of components for drawing
+    // the frame within a screen
+    pub fn compose(&self, body_theme: ColorSet) -> Components {
+        let body_theme = Component::Internal(body_theme.to_string());
+        if self.border == 0 {
+            // FIXME: this will fuck up subframes
+            return vec![body_theme, Component::Clear].into();
         }
-        for y in self.border..h_len - self.border {
-            frame.push(format!(
-                "{left}{body_clear}{frame_theme}{left}{char}{right}{char}",
-                body_clear = &body_clear,
-                frame_theme = &frame_theme,
-                left = self.goto_internal(0, y),
-                right = self.goto_internal(w_len - self.border, y),
-                char = FRAME_CHAR_VERTICAL
-                    .to_string()
-                    .repeat(self.border as usize),
-            ));
-        }
-        for y in h_len - self.border..h_len {
-            frame.push(self.write_frame_line(y, w_len));
-        }
-        frame.push(self.goto(0, 0));
-        frame.push(body_theme);
-        frame.concat()
+        let (w_len, h_len) = self.size();
+        let frame_theme = Component::Internal(self.theme.to_string());
+
+        let body_clear = Component::Internal(
+            Into::<Components>::into(vec![
+                body_theme.clone(),
+                Component::Padding(w_len),
+            ])
+            .concat_for(self),
+        );
+
+        let border =
+            Component::Repeated(FRAME_CHAR_VERTICAL, self.border);
+        // This seems cursed but, I assure you, it's fine
+        vec![vec![frame_theme.clone()]]
+            .into_iter()
+            // Top horizontal borders
+            .chain(
+                (0..self.border)
+                    .into_iter()
+                    .map(|y: u16| self.write_frame_line(y, w_len).0),
+            )
+            // Frame body + vertical frame borders
+            .chain(
+                (self.border..h_len - self.border).into_iter().map(
+                    |y: u16| {
+                        let left = self.goto_internal(0, y);
+                        let right = self
+                            .goto_internal(w_len - self.border, y);
+                        vec![
+                            left.clone(),
+                            body_clear.clone(),
+                            frame_theme.clone(),
+                            left,
+                            border.clone(),
+                            right,
+                            border.clone(),
+                        ]
+                    },
+                ),
+            )
+            // Bottom horizontal border
+            .chain(
+                (h_len - self.border..h_len)
+                    .into_iter()
+                    .map(|y: u16| self.write_frame_line(y, w_len).0),
+            )
+            // Theme reset + move to beginning of inside frame
+            .chain(
+                vec![vec![Component::Goto(0, 0), body_theme]]
+                    .into_iter(),
+            )
+            .flatten()
+            .collect::<Vec<Component>>()
+            .into()
     }
 }
 

src/display/mod.rs

@@ -89,7 +89,7 @@ pub struct Environment {
 
 impl Into<String> for Environment {
     fn into(self) -> String {
-        self.frame.frame_str(self.theme.primary())
+        self.frame.frame_str(self.theme.colors.primary)
     }
 }
 
@@ -107,7 +107,7 @@ impl Environment {
 
     #[inline(always)]
     pub fn primary_frame(&self) -> String {
-        self.frame.frame_str(self.theme.primary())
+        self.frame.frame_str(self.theme.colors.primary)
     }
 }