cargo-kconfig 0.0.1

/*
 Cargo KConfig - KConfig parser
 Copyright (C) 2022  Sjoerd van Leent

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Unless required by applicable law or agreed to in writing, software distributed
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specific language governing permissions and limitations under the License.

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Copyright Notice: GPLv2

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

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along with this program.  If not, see <https://www.gnu.org/licenses/>.

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The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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*/

//! This module represents the error window of the ncurses interface of the
//! Kconfig menu, which is shown if the contents of the window have been
//! changed, and the user should be requested to save the results.

use crate::cli_parser::dotconfig_file;

use super::ll::mvwaddwstr;
use super::traits::WindowLike;
use super::utils::create_window;
use super::utils::ColorPair;
use super::utils::StringExt;
use kconfig_represent::LoadError;
use ncurses::*;

pub(super) struct ErrorWindow {
    w: Option<WINDOW>,
    text_w: Option<WINDOW>,
    error_text: String,
}

impl ErrorWindow {
    pub fn load_error(&mut self, load_error: &LoadError) {
        self.error_text = format!("{}", load_error);
    }
}

impl WindowLike for ErrorWindow {
    fn new() -> Self {
        Self {
            w: None,
            text_w: None,
            error_text: String::default(),
        }
    }

    fn create(&mut self) {
        let (left, top, cols, lines) = bounds();
        self.w = Some(create_window(
            lines,
            cols,
            top,
            left,
            ColorPair::ErrorWindow.raw(),
        ));

        self.text_w = Some(create_window(
            lines - 4,
            cols - 4,
            top + 2,
            left + 2,
            ColorPair::ErrorWindow.raw(),
        ));
    }

    fn del(&self) {
        if let Some(w) = self.w {
            delwin(w);
        }
        if let Some(w) = self.text_w {
            delwin(w);
        }
    }

    fn raw(&self) -> Option<WINDOW> {
        self.w
    }

    fn draw(&mut self) {
        let (_, _, cols, lines) = bounds();
        if let Some(w) = self.w {
            wclear(w);
            wbkgd(w, COLOR_PAIR(ColorPair::ExitWindow.raw()));
            wborder(
                w,
                ACS_VLINE(),
                ACS_VLINE(),
                ACS_HLINE(),
                ACS_HLINE(),
                ACS_ULCORNER(),
                ACS_URCORNER(),
                ACS_LLCORNER(),
                ACS_LRCORNER(),
            );
            let title =
                format!(" 🚨 {}: {} ", "Error report for", dotconfig_file()).unicode_truncate(cols);
            mvwaddwstr(w, 0, 2, &title);
            mvwaddstr(w, lines - 1, 2, " [Enter] Accept | [X] Exit ");
            wrefresh(w);
        }
        if let Some(w) = self.text_w {
            wclear(w);
            wbkgd(w, COLOR_PAIR(ColorPair::ExitWindow.raw()));
            mvwaddstr(w, 0, 0, &format!("{}", self.error_text));
            wrefresh(w);
        }
    }
}

fn bounds() -> (i32, i32, i32, i32) {
    let screen_height = getmaxy(stdscr());
    let screen_width = getmaxx(stdscr());

    let left = 5;
    let top = 5;
    let cols = screen_width - (left * 2);
    let lines = screen_height - (top * 2);
    (left, top, cols, lines)
}