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utilities/pager: show scrolling percentage and/or search results position

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This commit is contained in:
Manos Pitsidianakis 2020-12-01 15:47:45 +02:00
parent 7db32ff1b3
commit c5a5c2666b
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GPG Key ID: 73627C2F690DF710
1 changed files with 110 additions and 7 deletions
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117
src/components/utilities/pager.rs
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@ -54,6 +54,7 @@ impl fmt::Display for Pager {
impl Pager {
pub const DESCRIPTION: &'static str = "pager";
const PAGES_AHEAD_TO_RENDER_NO: usize = 16;
pub fn new(context: &Context) -> Self {
let mut ret = Pager::default();
ret.minimum_width = context.settings.pager.minimum_width;
@ -240,8 +241,18 @@ impl Pager {
.map(|offset| (y, offset)),
);
}
if let Some(pos) = search.positions.get(search.cursor) {
if self.cursor.1 > pos.0 || self.cursor.1 + height!(area) < pos.0 {
self.cursor.1 = pos.0.saturating_sub(3);
}
}
}
self.draw_lines_up_to(grid, area, context, self.cursor.1 + 2 * height!(area));
self.draw_lines_up_to(
grid,
area,
context,
self.cursor.1 + Self::PAGES_AHEAD_TO_RENDER_NO * height!(area),
);
self.draw_page(grid, area, context);
self.initialised = true;
}
@ -350,8 +361,10 @@ impl Pager {
{
let x = *x + get_x(upper_left);
let y = *y - cursor_line;
for c in grid.row_iter(x..x + search.pattern.grapheme_len(), y + get_y(upper_left))
{
for c in grid.row_iter(
x..x + search.pattern.grapheme_width(),
y + get_y(upper_left),
) {
if i == search.cursor {
grid[c]
.set_fg(results_current_attr.fg)
@ -399,7 +412,12 @@ impl Component for Pager {
} else {
self.cursor.1 = self.height.saturating_sub(1);
}
self.draw_lines_up_to(grid, area, context, self.cursor.1 + height);
self.draw_lines_up_to(
grid,
area,
context,
self.cursor.1 + Self::PAGES_AHEAD_TO_RENDER_NO * height,
);
}
PageMovement::PageDown(multiplier) => {
if self.cursor.1 + height * multiplier + 1 < self.height {
@ -409,7 +427,12 @@ impl Component for Pager {
} else {
self.cursor.1 = (self.height / height) * height;
}
self.draw_lines_up_to(grid, area, context, self.cursor.1 + height);
self.draw_lines_up_to(
grid,
area,
context,
self.cursor.1 + Self::PAGES_AHEAD_TO_RENDER_NO * height,
);
}
PageMovement::Right(amount) => {
if self.cursor.0 + amount + 1 < self.width {
@ -425,8 +448,8 @@ impl Component for Pager {
self.cursor.1 = 0;
}
PageMovement::End => {
self.cursor.1 = self.height.saturating_sub(1);
self.draw_lines_up_to(grid, area, context, 0);
self.cursor.1 = self.height.saturating_sub(1);
}
}
}
@ -462,7 +485,11 @@ impl Component for Pager {
let (width, height) = (self.line_breaker.width().unwrap_or(cols), self.height);
if self.show_scrollbar && rows < height {
cols -= 1;
rows -= 1;
} else if self.search.is_some() {
rows -= 1;
}
if self.show_scrollbar && cols < width {
rows -= 1;
}
@ -470,7 +497,11 @@ impl Component for Pager {
std::cmp::min(width.saturating_sub(cols), self.cursor.0),
std::cmp::min(height.saturating_sub(rows), self.cursor.1),
);
self.draw_page(grid, area, context);
self.draw_page(
grid,
(upper_left!(area), pos_inc(upper_left!(area), (cols, rows))),
context,
);
if self.show_scrollbar && rows < height {
ScrollBar::default().set_show_arrows(true).draw(
grid,
@ -500,6 +531,78 @@ impl Component for Pager {
width,
);
}
if (rows < height) || self.search.is_some() {
const RESULTS_STR: &str = "Results for ";
let shown_percentage =
((self.cursor.1 + rows) as f32 / (height as f32) * 100.0) as usize;
let shown_lines = self.cursor.1 + rows;
let total_lines = height;
let scrolling = if rows < height {
format!(
"{shown_percentage}% {line_desc}{shown_lines}/{total_lines}{has_more_lines}",
line_desc = if grid.ascii_drawing { "lines:" } else { "☰ " },
shown_percentage = shown_percentage,
shown_lines = shown_lines,
total_lines = total_lines,
has_more_lines = if self.line_breaker.is_finished() {
""
} else {
"(+)"
}
)
} else {
String::new()
};
let search_results = if let Some(ref search) = self.search {
format!(
"{results_str}{search_pattern}: {current_pos}/{total_results}{has_more_lines}",
results_str = RESULTS_STR,
search_pattern = &search.pattern,
current_pos = if search.positions.is_empty() {
0
} else {
search.cursor + 1
},
total_results = search.positions.len(),
has_more_lines = if self.line_breaker.is_finished() {
""
} else {
"(+)"
}
)
} else {
String::new()
};
let status_message = format!(
"{search_results}{divider}{scrolling}",
search_results = search_results,
divider = if self.search.is_some() { " " } else { "" },
scrolling = scrolling,
);
let mut attribute = crate::conf::value(context, "status.bar");
if !context.settings.terminal.use_color() {
attribute.attrs |= Attr::REVERSE;
}
let (_, y) = write_string_to_grid(
&status_message,
grid,
attribute.fg,
attribute.bg,
attribute.attrs,
(
set_y(upper_left!(area), get_y(bottom_right!(area))),
bottom_right!(area),
),
None,
);
/* set search pattern to italics */
if let Some(ref search) = self.search {
let start_x = get_x(upper_left!(area)) + RESULTS_STR.len();
for c in grid.row_iter(start_x..(start_x + search.pattern.grapheme_width()), y) {
grid[c].set_attrs(attribute.attrs | Attr::ITALICS);
}
}
}
context.dirty_areas.push_back(area);
}