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EditView: keep cursor in view after key event

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This commit is contained in:
Alexandre Bury 2018-05-03 08:36:17 -07:00
parent 3731b7375d
commit d4ced015f6
1 changed files with 17 additions and 8 deletions
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25
src/views/edit_view.rs
View File

@ -1,4 +1,3 @@
use {Cursive, Printer, With};
use direction::Direction; use direction::Direction;
use event::{Callback, Event, EventResult, Key, MouseEvent}; use event::{Callback, Event, EventResult, Key, MouseEvent};
use std::cell::RefCell; use std::cell::RefCell;
@ -9,6 +8,7 @@ use unicode_width::{UnicodeWidthChar, UnicodeWidthStr};
use utils::lines::simple::{simple_prefix, simple_suffix}; use utils::lines::simple::{simple_prefix, simple_suffix};
use vec::Vec2; use vec::Vec2;
use view::View; use view::View;
use {Cursive, Printer, With};
/// Closure type for callbacks when the content is modified. /// Closure type for callbacks when the content is modified.
/// ///
@ -367,7 +367,8 @@ impl EditView {
self.offset = 0; self.offset = 0;
self.set_cursor(len); self.set_cursor(len);
self.make_edit_cb().unwrap_or_else(Callback::dummy) self.make_edit_cb()
.unwrap_or_else(Callback::dummy)
} }
/// Get the current text. /// Get the current text.
@ -419,7 +420,8 @@ impl EditView {
self.keep_cursor_in_view(); self.keep_cursor_in_view();
self.make_edit_cb().unwrap_or_else(Callback::dummy) self.make_edit_cb()
.unwrap_or_else(Callback::dummy)
} }
/// Remove the character at the current cursor position. /// Remove the character at the current cursor position.
@ -434,7 +436,8 @@ impl EditView {
self.keep_cursor_in_view(); self.keep_cursor_in_view();
self.make_edit_cb().unwrap_or_else(Callback::dummy) self.make_edit_cb()
.unwrap_or_else(Callback::dummy)
} }
fn make_edit_cb(&self) -> Option<Callback> { fn make_edit_cb(&self) -> Option<Callback> {
@ -615,15 +618,20 @@ impl View for EditView {
return EventResult::Consumed(Some(self.insert(ch))); return EventResult::Consumed(Some(self.insert(ch)));
} }
// TODO: handle ctrl-key? // TODO: handle ctrl-key?
Event::Key(Key::Home) => self.cursor = 0, Event::Key(Key::Home) => self.set_cursor(0),
Event::Key(Key::End) => self.cursor = self.content.len(), Event::Key(Key::End) => {
// When possible, NLL to the rescue!
let len = self.content.len();
self.set_cursor(len);
}
Event::Key(Key::Left) if self.cursor > 0 => { Event::Key(Key::Left) if self.cursor > 0 => {
let len = self.content[..self.cursor] let len = self.content[..self.cursor]
.graphemes(true) .graphemes(true)
.last() .last()
.unwrap() .unwrap()
.len(); .len();
self.cursor -= len; let cursor = self.cursor - len;
self.set_cursor(cursor);
} }
Event::Key(Key::Right) if self.cursor < self.content.len() => { Event::Key(Key::Right) if self.cursor < self.content.len() => {
let len = self.content[self.cursor..] let len = self.content[self.cursor..]
@ -631,7 +639,8 @@ impl View for EditView {
.next() .next()
.unwrap() .unwrap()
.len(); .len();
self.cursor += len; let cursor = self.cursor + len;
self.set_cursor(cursor);
} }
Event::Key(Key::Backspace) if self.cursor > 0 => { Event::Key(Key::Backspace) if self.cursor > 0 => {
let len = self.content[..self.cursor] let len = self.content[..self.cursor]