421 lines
15 KiB
Rust
421 lines
15 KiB
Rust
#![allow(dead_code)]
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use rustbox;
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use rustbox::Color;
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use editor::Editor;
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use std::char;
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use std::time::duration::Duration;
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use string_utils::{is_line_ending};
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use buffer::line::{line_ending_to_str, LineEnding};
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// Key codes
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const K_ENTER: u16 = 13;
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const K_TAB: u16 = 9;
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const K_SPACE: u16 = 32;
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const K_BACKSPACE: u16 = 127;
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const K_DELETE: u16 = 65522;
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const K_PAGEUP: u16 = 65519;
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const K_PAGEDOWN: u16 = 65518;
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const K_UP: u16 = 65517;
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const K_DOWN: u16 = 65516;
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const K_LEFT: u16 = 65515;
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const K_RIGHT: u16 = 65514;
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const K_ESC: u16 = 27;
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const K_CTRL_L: u16 = 12;
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const K_CTRL_O: u16 = 15;
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const K_CTRL_Q: u16 = 17;
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const K_CTRL_S: u16 = 19;
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const K_CTRL_Y: u16 = 25;
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const K_CTRL_Z: u16 = 26;
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pub struct TermUI {
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rb: rustbox::RustBox,
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editor: Editor,
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width: usize,
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height: usize,
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}
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impl TermUI {
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pub fn new() -> TermUI {
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let rb = rustbox::RustBox::init(&[Some(rustbox::InitOption::BufferStderr)]).unwrap();
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let w = rb.width();
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let h = rb.height();
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let mut editor = Editor::new();
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editor.update_dim(h-1, w);
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TermUI {
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rb: rb,
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editor: editor,
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width: w,
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height: h,
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}
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}
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pub fn new_from_editor(ed: Editor) -> TermUI {
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let rb = rustbox::RustBox::init(&[Some(rustbox::InitOption::BufferStderr)]).unwrap();
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let w = rb.width();
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let h = rb.height();
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let mut editor = ed;
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editor.update_dim(h-1, w);
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TermUI {
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rb: rb,
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editor: editor,
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width: w,
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height: h,
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}
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}
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pub fn main_ui_loop(&mut self) {
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// Quitting flag
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let mut quit = false;
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self.editor.update_dim(self.height-1, self.width);
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loop {
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// Draw the editor to screen
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self.rb.clear();
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self.draw_editor(&self.editor, (0, 0), (self.height-1, self.width-1));
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self.rb.present();
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// Handle events. We block on the first event, so that the
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// program doesn't loop like crazy, but then continue pulling
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// events in a non-blocking way until we run out of events
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// to handle.
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let mut e = self.rb.poll_event(); // Block until we get an event
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loop {
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match e {
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Ok(rustbox::Event::KeyEvent(modifier, key, character)) => {
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//println!(" {} {} {}", modifier, key, character);
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match key {
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K_CTRL_Q => {
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quit = true;
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break;
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},
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K_CTRL_S => {
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self.editor.save_if_dirty();
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},
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K_CTRL_Z => {
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self.editor.undo();
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},
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K_CTRL_Y => {
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self.editor.redo();
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},
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K_CTRL_L => {
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self.go_to_line_ui_loop();
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},
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K_PAGEUP => {
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self.editor.page_up();
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},
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K_PAGEDOWN => {
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self.editor.page_down();
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},
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K_UP => {
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self.editor.cursor_up(1);
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},
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K_DOWN => {
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self.editor.cursor_down(1);
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},
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K_LEFT => {
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self.editor.cursor_left(1);
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},
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K_RIGHT => {
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self.editor.cursor_right(1);
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},
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K_ENTER => {
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let nl = line_ending_to_str(self.editor.buffer.line_ending_type);
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self.editor.insert_text_at_cursor(nl);
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},
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K_SPACE => {
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self.editor.insert_text_at_cursor(" ");
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},
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K_TAB => {
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self.editor.insert_tab_at_cursor();
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},
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K_BACKSPACE => {
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self.editor.backspace_at_cursor();
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},
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K_DELETE => {
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self.editor.remove_text_in_front_of_cursor(1);
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},
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// Character
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0 => {
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if let Option::Some(c) = char::from_u32(character) {
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self.editor.insert_text_at_cursor(c.to_string().as_slice());
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}
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},
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_ => {}
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}
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},
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Ok(rustbox::Event::ResizeEvent(w, h)) => {
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self.width = w as usize;
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self.height = h as usize;
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self.editor.update_dim(self.height-1, self.width);
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},
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_ => {
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break;
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}
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}
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e = self.rb.peek_event(Duration::milliseconds(0)); // Get next event (if any)
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}
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// Quit if quit flag is set
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if quit {
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break;
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}
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}
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}
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fn go_to_line_ui_loop(&mut self) {
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let foreground = Color::Black;
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let background = Color::Cyan;
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let mut cancel = false;
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let mut confirm = false;
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let prefix = "Jump to line: ";
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let mut line = String::new();
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loop {
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// Draw the editor to screen
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self.rb.clear();
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self.draw_editor(&self.editor, (0, 0), (self.height-1, self.width-1));
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for i in range(0, self.width) {
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self.rb.print(i, 0, rustbox::RB_NORMAL, foreground, background, " ");
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}
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self.rb.print(1, 0, rustbox::RB_NORMAL, foreground, background, prefix);
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self.rb.print(prefix.len() + 1, 0, rustbox::RB_NORMAL, foreground, background, line.as_slice());
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self.rb.present();
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// Handle events. We block on the first event, so that the
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// program doesn't loop like crazy, but then continue pulling
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// events in a non-blocking way until we run out of events
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// to handle.
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let mut e = self.rb.poll_event(); // Block until we get an event
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loop {
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match e {
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Ok(rustbox::Event::KeyEvent(modifier, key, character)) => {
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match key {
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K_ESC => {
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cancel = true;
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break;
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},
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K_ENTER => {
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confirm = true;
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break;
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},
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K_BACKSPACE => {
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line.pop();
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},
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// Character
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0 => {
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if let Option::Some(c) = char::from_u32(character) {
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if c.is_numeric() {
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line.push(c);
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}
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}
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},
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_ => {}
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}
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},
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Ok(rustbox::Event::ResizeEvent(w, h)) => {
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self.width = w as usize;
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self.height = h as usize;
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self.editor.update_dim(self.height-1, self.width);
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},
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_ => {
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break;
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}
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}
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e = self.rb.peek_event(Duration::milliseconds(0)); // Get next event (if any)
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}
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// Cancel if flag is set
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if cancel {
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break;
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}
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// Jump to line!
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if confirm {
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if let Some(n) = line.parse() {
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let n2: usize = n; // Weird work-around: the type of n wasn't being inferred
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if n2 > 0 {
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self.editor.jump_to_line(n2-1);
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}
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else {
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self.editor.jump_to_line(0);
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}
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}
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break;
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}
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}
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}
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fn draw_editor(&self, editor: &Editor, c1: (usize, usize), c2: (usize, usize)) {
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let foreground = Color::Black;
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let background = Color::Cyan;
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// Fill in top row with info line color
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for i in range(c1.1, c2.1 + 1) {
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self.rb.print(i, c1.0, rustbox::RB_NORMAL, foreground, background, " ");
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}
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// Filename and dirty marker
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let filename = editor.file_path.display();
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let dirty_char = if editor.dirty {"*"} else {""};
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let name = format!("{}{}", filename, dirty_char);
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self.rb.print(c1.1 + 1, c1.0, rustbox::RB_NORMAL, foreground, background, name.as_slice());
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// Percentage position in document
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let percentage: usize = if editor.buffer.grapheme_count() > 0 {
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(((editor.cursor.range.0 as f32) / (editor.buffer.grapheme_count() as f32)) * 100.0) as usize
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}
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else {
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100
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};
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let pstring = format!("{}%", percentage);
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self.rb.print(c2.1 - pstring.len(), c1.0, rustbox::RB_NORMAL, foreground, background, pstring.as_slice());
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// Text encoding info and tab style
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let nl = match editor.buffer.line_ending_type {
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LineEnding::None => "None",
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LineEnding::CRLF => "CRLF",
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LineEnding::LF => "LF",
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LineEnding::VT => "VT",
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LineEnding::FF => "FF",
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LineEnding::CR => "CR",
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LineEnding::NEL => "NEL",
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LineEnding::LS => "LS",
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LineEnding::PS => "PS",
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};
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let soft_tabs_str = if editor.soft_tabs {"spaces"} else {"tabs"};
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let info_line = format!("UTF8:{} {}:{}", nl, soft_tabs_str, editor.tab_width);
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self.rb.print(c2.1 - 30, c1.0, rustbox::RB_NORMAL, foreground, background, info_line.as_slice());
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// Draw main text editing area
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self.draw_editor_text(editor, (c1.0 + 1, c1.1), c2);
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}
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fn draw_editor_text(&self, editor: &Editor, c1: (usize, usize), c2: (usize, usize)) {
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let mut line_iter = editor.buffer.line_iter_at_index(editor.view_pos.0);
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let mut grapheme_index;
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let mut vis_line_num = editor.view_pos.0;
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let mut vis_col_num = editor.view_pos.1;
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let mut print_line_num = c1.0;
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let mut print_col_num = c1.1;
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let max_print_line = c2.0;
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let max_print_col = c2.1;
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loop {
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if let Some(line) = line_iter.next() {
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let mut g_iter = line.grapheme_vis_iter(editor.tab_width);
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let excess = g_iter.skip_vis_positions(editor.view_pos.1);
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vis_col_num += excess;
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print_col_num += excess;
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grapheme_index = editor.buffer.pos_vis_2d_to_closest_1d((vis_line_num, vis_col_num), editor.tab_width);
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for (g, pos, width) in g_iter {
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print_col_num = pos - editor.view_pos.1;
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if is_line_ending(g) {
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if grapheme_index == editor.cursor.range.0 {
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self.rb.print(print_col_num, print_line_num, rustbox::RB_NORMAL, Color::Black, Color::White, " ");
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}
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}
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else if g == "\t" {
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for i in range(print_col_num, print_col_num + width) {
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self.rb.print(i, print_line_num, rustbox::RB_NORMAL, Color::White, Color::Black, " ");
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}
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if grapheme_index == editor.cursor.range.0 {
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self.rb.print(print_col_num, print_line_num, rustbox::RB_NORMAL, Color::Black, Color::White, " ");
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}
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}
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else {
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if grapheme_index == editor.cursor.range.0 {
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self.rb.print(print_col_num, print_line_num, rustbox::RB_NORMAL, Color::Black, Color::White, g);
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}
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else {
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self.rb.print(print_col_num, print_line_num, rustbox::RB_NORMAL, Color::White, Color::Black, g);
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}
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}
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vis_col_num += width;
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grapheme_index += 1;
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print_col_num += width;
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if print_col_num > max_print_col {
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break;
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}
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}
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}
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else {
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break;
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}
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vis_line_num += 1;
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print_line_num += 1;
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vis_col_num = editor.view_pos.1;
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if print_line_num > max_print_line {
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break;
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}
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}
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// Print cursor if it's at the end of the text, and thus wasn't printed
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// already.
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if editor.cursor.range.0 >= editor.buffer.grapheme_count() {
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let vis_cursor_pos = editor.buffer.pos_1d_to_closest_vis_2d(editor.cursor.range.0, editor.tab_width);
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if (vis_cursor_pos.0 >= editor.view_pos.0) && (vis_cursor_pos.1 >= editor.view_pos.1) {
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let print_cursor_pos = (vis_cursor_pos.0 - editor.view_pos.0 + c1.0, vis_cursor_pos.1 - editor.view_pos.1 + c1.1);
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if print_cursor_pos.0 >= c1.0 && print_cursor_pos.0 <= c2.0 && print_cursor_pos.1 >= c1.1 && print_cursor_pos.1 <= c2.1 {
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self.rb.print(print_cursor_pos.1, print_cursor_pos.0, rustbox::RB_NORMAL, Color::Black, Color::White, " ");
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}
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}
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}
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}
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} |