From 20b9947a881b5f68b594de936e2998e42f674fed Mon Sep 17 00:00:00 2001
From: Able <abl3theabove@gmail.com>
Date: Sat, 5 Feb 2022 00:06:07 -0600
Subject: [PATCH] vterm

---
 ableos/src/experiments/vterm.rs | 71 +++++++++++++++++++++++++++------
 ableos/src/kmain.rs             |  8 +++-
 2 files changed, 66 insertions(+), 13 deletions(-)

diff --git a/ableos/src/experiments/vterm.rs b/ableos/src/experiments/vterm.rs
index 9f7efd2..5e3ce86 100644
--- a/ableos/src/experiments/vterm.rs
+++ b/ableos/src/experiments/vterm.rs
@@ -5,22 +5,17 @@ pub const VTERM_WIDTH: u32 = 100;
 /// Fg and bg colors for vterm
 pub type ColorCharacter = (Rgba64, Rgba64);
 
+/// A vterm representation of a character
+#[derive(Debug, Clone, Copy)]
 pub struct VtermCharacter {
     pub character: char,
     //
-    pub fg: Rgba64,
-    pub bg: Rgba64,
+    pub char_color: ColorCharacter,
     //
     pub style: Style,
 }
 
-pub struct Vterm {
-    pub characters: [[VtermCharacter; VTERM_WIDTH as usize]; VTERM_HEIGHT as usize],
-    pub cursor_x: u32,
-    pub cursor_y: u32,
-    pub cursor_visible: bool,
-}
-
+#[derive(Debug, Clone, Copy)]
 pub struct Style {
     pub bold: bool,
     pub underline: bool,
@@ -30,10 +25,62 @@ pub struct Style {
     pub strike: bool,
 }
 
-pub struct StylePacked(u8);
+pub struct StylePacked(pub u8);
 
-impl StylePacked {
+pub struct Vterm {
+    pub characters: [[VtermCharacter; VTERM_WIDTH as usize]; VTERM_HEIGHT as usize],
+    /// The internal representation of the vterm
+    style: Style,
+    /// The cursor position in layout x,y
+    cursor_position: (u32, u32),
+
+    pub cursor_visible: bool,
+}
+
+impl Vterm {
     pub fn new() -> Self {
-        StylePacked(0)
+        Vterm {
+            characters: [[VtermCharacter {
+                character: ' ',
+                char_color: (0xff_ff_ff_ff, 0x00_00_00_00),
+                style: Style {
+                    bold: false,
+                    underline: false,
+                    italic: false,
+                    blink: false,
+                    reverse: false,
+                    strike: false,
+                },
+            }; VTERM_WIDTH as usize]; VTERM_HEIGHT as usize],
+            cursor_position: (0, 0),
+            cursor_visible: true,
+            style: Style {
+                bold: false,
+                underline: false,
+                italic: false,
+                blink: false,
+                reverse: false,
+                strike: false,
+            },
+        }
+    }
+
+    /// Set the vterm cursor to the given position
+    pub fn set_cursor_position(&mut self, x: u32, y: u32) {
+        if x > VTERM_WIDTH {
+            self.cursor_position.0 = VTERM_WIDTH;
+        } else {
+            self.cursor_position.0 = x;
+        }
+        if y > VTERM_HEIGHT {
+            self.cursor_position.1 = VTERM_HEIGHT;
+        } else {
+            self.cursor_position.1 = y;
+        }
+    }
+
+    /// Set the vterm style
+    pub fn set_vterm_style(&mut self, style: Style) {
+        self.style = style;
     }
 }
diff --git a/ableos/src/kmain.rs b/ableos/src/kmain.rs
index 9d19f06..dca440a 100644
--- a/ableos/src/kmain.rs
+++ b/ableos/src/kmain.rs
@@ -84,6 +84,9 @@ pub fn kernel_main() -> ! {
     }
 
     */
+
+    let mut vterm0 = Vterm::new();
+    vterm0.set_cursor_position(123, 123);
     start_facepalm();
     sloop()
 }
@@ -138,7 +141,10 @@ use uefi::{
 };
 use uefi::{proto::console::gop::FrameBuffer, ResultExt};
 
-use crate::{GraphicsReturn, ScreenBuffer};
+use crate::{
+    vterm::{self, Vterm},
+    GraphicsReturn, ScreenBuffer,
+};
 
 #[entry]
 fn main(_handle: Handle, mut system_table: SystemTable<Boot>) -> Status {