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Fix erasing the old cursor

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This commit is contained in:
pjht 2024-09-09 11:05:26 -05:00
parent 7612fba1e4
commit cce162bd72
Signed by: pjht
GPG Key ID: CA239FC6934E6F3A
1 changed files with 17 additions and 18 deletions
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35
src/main.rs
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@ -21,7 +21,7 @@
use core::str;
use std::{
borrow::Cow, collections::HashMap, fmt::{self, Write}, os::mikros::{address_space::ACTIVE_SPACE, ipc, syscalls}
borrow::Cow, collections::HashMap, fmt::{self, Write}, os::mikros::{address_space::ACTIVE_SPACE, ipc, syscalls}, usize
};
use fontdue::{layout::{CoordinateSystem, GlyphRasterConfig, Layout, LayoutSettings, TextStyle, WrapStyle}, Font, FontSettings};
@ -162,7 +162,8 @@ pub struct FramebufferWriter {
layout: Layout,
next_line_y: usize,
glyph_cache: HashMap<GlyphRasterConfig, Vec<u8>>,
cursor_height: usize,
cursor_top: usize,
cursor_bot: usize,
}
impl FramebufferWriter {
@ -180,7 +181,8 @@ impl FramebufferWriter {
layout,
next_line_y: 0,
glyph_cache: HashMap::new(),
cursor_height: 0,
cursor_top: 0,
cursor_bot: 0,
}
}
@ -190,6 +192,10 @@ impl FramebufferWriter {
let text_height = self.layout.height();
self.layout.append(&[&self.font], &TextStyle::new("\u{2588}", 12.0, 0));
for row in self.cursor_top..self.cursor_bot {
fbuf.clear_row(row);
}
if (self.next_line_y + self.layout.height() as usize) > fbuf.yres {
let excess_y =
self.layout.height() as usize - (fbuf.yres - self.next_line_y);
@ -197,25 +203,13 @@ impl FramebufferWriter {
self.next_line_y -= excess_y;
}
for row in 0..usize::max(self.cursor_height+5,text_height as usize) {
fbuf.clear_row(self.next_line_y + row);
}
//for row in 0..(fbuf.yres - self.next_line_y) {
// fbuf.clear_row(self.next_line_y + row);
//}
self.cursor_height = (self.layout.height() - text_height) as usize;
let glyphs = self.layout.glyphs();
let lines = self.layout.lines().unwrap();
let mut first_line_top_offset = None;
let first_line = lines[0];
let first_line_top_offset = (first_line.baseline_y - first_line.max_ascent) as usize;
for line in self.layout.lines().unwrap() {
if first_line_top_offset.is_none() {
first_line_top_offset = Some((line.baseline_y - line.max_ascent) as usize);
}
let first_line_top_offset = first_line_top_offset.unwrap();
for glyph_pos in &glyphs[line.glyph_start..=line.glyph_end] {
if glyph_pos.width == 0 || glyph_pos.height == 0 {
continue;
@ -239,6 +233,11 @@ impl FramebufferWriter {
}
}
let cursor_glyph = glyphs.last().unwrap();
self.cursor_top = cursor_glyph.y as usize - first_line_top_offset + self.next_line_y;
self.cursor_bot = cursor_glyph.y as usize - first_line_top_offset + self.next_line_y + cursor_glyph.height;
let last_line = self.layout.lines().unwrap().last().unwrap();
fbuf.update_screen();