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@ -13,6 +13,8 @@ use crate::view::View;
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/// state (usually by creating and applying a transaction).
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pub type Command = fn(view: &mut View, count: usize);
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const PADDING: u16 = 10;
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pub fn move_char_left(view: &mut View, count: usize) {
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// TODO: use a transaction
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let selection = view
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@ -127,7 +129,7 @@ pub fn move_file_start(view: &mut View, _count: usize) {
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pub fn move_file_end(view: &mut View, _count: usize) {
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// TODO: use a transaction
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let text = &view.state.doc;
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let last_line = text.line_to_char(text.len_lines().checked_sub(2).unwrap());
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let last_line = text.line_to_char(text.len_lines().saturating_sub(2));
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view.state.selection = Selection::single(last_line, last_line);
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view.state.mode = Mode::Normal;
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@ -136,7 +138,7 @@ pub fn move_file_end(view: &mut View, _count: usize) {
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pub fn check_cursor_in_view(view: &mut View) -> bool {
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let cursor = view.state.selection().cursor();
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let line = view.state.doc().char_to_line(cursor) as u16;
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let document_end = view.first_line + view.size.1.saturating_sub(1) - 1;
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let document_end = view.first_line + view.size.1.saturating_sub(2);
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let padding = 5u16;
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if (line > document_end.saturating_sub(padding)) | (line < view.first_line + padding) {
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@ -148,44 +150,37 @@ pub fn check_cursor_in_view(view: &mut View) -> bool {
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pub fn page_up(view: &mut View, _count: usize) {
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let text = &view.state.doc;
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view.first_line = view.first_line.saturating_sub(view.size.1);
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let pos = text.line_to_char(view.first_line as usize);
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view.state.selection = Selection::single(
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text.line_to_char(view.first_line as usize),
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text.line_to_char(view.first_line as usize),
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);
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view.state.selection = Selection::single(pos, pos);
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}
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pub fn page_down(view: &mut View, _count: usize) {
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let text = &view.state.doc;
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view.first_line += view.size.1;
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view.state.selection = Selection::single(
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text.line_to_char(view.first_line as usize),
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text.line_to_char(view.first_line as usize),
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);
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view.first_line += view.size.1 + PADDING;
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if view.first_line < view.state.doc().len_lines() as u16 {
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let pos = text.line_to_char(view.first_line as usize);
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view.state.selection = Selection::single(pos, pos);
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}
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}
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pub fn half_page_up(view: &mut View, _count: usize) {
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view.first_line = view.first_line.saturating_sub(view.size.1 / 2);
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if !check_cursor_in_view(view) {
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let text = &view.state.doc;
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view.state.selection = Selection::single(
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text.line_to_char(view.first_line as usize),
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text.line_to_char(view.first_line as usize),
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);
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let pos = text.line_to_char(view.first_line as usize);
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view.state.selection = Selection::single(pos, pos);
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}
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}
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pub fn half_page_down(view: &mut View, _count: usize) {
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view.first_line += view.size.1 / 2;
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if view.first_line < view.state.doc().len_lines() as u16 - view.size.1 {
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view.first_line += view.size.1 / 2;
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}
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if !check_cursor_in_view(view) {
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let text = &view.state.doc;
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view.state.selection = Selection::single(
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text.line_to_char(view.first_line as usize),
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text.line_to_char(view.first_line as usize),
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);
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let pos = text.line_to_char(view.first_line as usize);
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view.state.selection = Selection::single(pos, pos);
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}
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}
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// avoid select by default by having a visual mode switch that makes movements into selects
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