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use std::io::BufRead;
use crate::files::File;
use crate::term::sized_string;
use crate::widget::{Widget, WidgetCore};
use crate::fail::HResult;
#[derive(PartialEq)]
pub struct TextView {
pub lines: Vec<String>,
pub buffer: String,
pub core: WidgetCore
}
impl TextView {
pub fn new_blank(core: &WidgetCore) -> TextView {
TextView {
lines: vec![],
buffer: String::new(),
core: core.clone()
}
}
pub fn new_from_file(core: &WidgetCore, file: &File) -> HResult<TextView> {
let file = std::fs::File::open(&file.path)?;
let file = std::io::BufReader::new(file);
let lines = file.lines().map(|line|
Ok(line?
.replace("\t", " ")))
.filter_map(|l: HResult<String>| l.ok())
.collect();
Ok(TextView {
lines: lines,
buffer: String::new(),
core: core.clone()
})
}
pub fn new_from_file_limit_lines(core: &WidgetCore,
file: &File,
num: usize) -> HResult<TextView> {
let file = std::fs::File::open(&file.path).unwrap();
let file = std::io::BufReader::new(file);
let lines = file.lines()
.take(num)
.map(|line|
Ok(line?
.replace("\t", " ")))
.filter_map(|l: HResult<String>| l.ok())
.collect();
Ok(TextView {
lines: lines,
buffer: String::new(),
core: core.clone()
})
}
pub fn set_text(&mut self, text: &str) -> HResult<()> {
let lines = text.lines().map(|l| l.to_string()).collect();
self.lines = lines;
self.refresh()
}
}
impl Widget for TextView {
fn get_core(&self) -> HResult<&WidgetCore> {
Ok(&self.core)
}
fn get_core_mut(&mut self) -> HResult<&mut WidgetCore> {
Ok(&mut self.core)
}
fn refresh(&mut self) -> HResult<()> {
let (xsize, ysize) = self.get_coordinates()?.size().size();
let (xpos, ypos) = self.get_coordinates()?.position().position();
self.buffer = self.get_clearlist()? +
&self
.lines
.iter()
.take(ysize as usize)
.enumerate()
.map(|(i, line)| {
format!(
"{}{}{}",
crate::term::goto_xy(xpos, i as u16 + ypos),
crate::term::reset(),
sized_string(&line, xsize))
})
.collect::<String>();
Ok(())
}
fn get_drawlist(&self) -> HResult<String> {
Ok(self.buffer.clone())
}
}
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