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Add scroll-top and scroll-bottom commands to scroll so cursor is at top

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or bottom. From Anindya Mukherjee, GitHub issue 3334.
This commit is contained in:
nicm
2022-09-28 07:59:50 +00:00
parent 9cc8e40aa0
commit a10452be2d
2 changed files with 59 additions and 8 deletions
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56
window-copy.c
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@@ -1250,20 +1250,23 @@ window_copy_cmd_cursor_right(struct window_copy_cmd_state *cs)
return (WINDOW_COPY_CMD_NOTHING);
}
/* Scroll line containing the cursor to the given position. */
static enum window_copy_cmd_action
window_copy_cmd_scroll_middle(struct window_copy_cmd_state *cs)
window_copy_cmd_scroll_to(struct window_copy_cmd_state *cs, u_int to)
{
struct window_mode_entry *wme = cs->wme;
struct window_copy_mode_data *data = wme->data;
u_int mid_value, oy, delta;
u_int oy, delta;
int scroll_up; /* >0 up, <0 down */
mid_value = (screen_size_y(&data->screen) - 1) / 2;
scroll_up = data->cy - mid_value;
scroll_up = data->cy - to;
delta = abs(scroll_up);
oy = screen_hsize(data->backing) + data->cy - data->oy;
oy = screen_hsize(data->backing) - data->oy;
log_debug ("XXX %u %u %u %d %u", mid_value, oy, delta, scroll_up, data->oy);
/*
* oy is the maximum scroll down amount, while data->oy is the maximum
* scroll up amount.
*/
if (scroll_up > 0 && data->oy >= delta) {
window_copy_scroll_up(wme, delta);
data->cy -= delta;
@@ -1276,6 +1279,35 @@ window_copy_cmd_scroll_middle(struct window_copy_cmd_state *cs)
return (WINDOW_COPY_CMD_REDRAW);
}
/* Scroll line containing the cursor to the bottom. */
static enum window_copy_cmd_action
window_copy_cmd_scroll_bottom(struct window_copy_cmd_state *cs)
{
struct window_copy_mode_data *data = cs->wme->data;
u_int bottom;
bottom = screen_size_y(&data->screen) - 1;
return (window_copy_cmd_scroll_to(cs, bottom));
}
/* Scroll line containing the cursor to the middle. */
static enum window_copy_cmd_action
window_copy_cmd_scroll_middle(struct window_copy_cmd_state *cs)
{
struct window_copy_mode_data *data = cs->wme->data;
u_int mid_value;
mid_value = (screen_size_y(&data->screen) - 1) / 2;
return (window_copy_cmd_scroll_to(cs, mid_value));
}
/* Scroll line containing the cursor to the top. */
static enum window_copy_cmd_action
window_copy_cmd_scroll_top(struct window_copy_cmd_state *cs)
{
return (window_copy_cmd_scroll_to(cs, 0));
}
static enum window_copy_cmd_action
window_copy_cmd_cursor_up(struct window_copy_cmd_state *cs)
{
@@ -2794,6 +2826,12 @@ static const struct {
.clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
.f = window_copy_cmd_refresh_from_pane
},
{ .command = "scroll-bottom",
.minargs = 0,
.maxargs = 0,
.clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
.f = window_copy_cmd_scroll_bottom
},
{ .command = "scroll-down",
.minargs = 0,
.maxargs = 0,
@@ -2812,6 +2850,12 @@ static const struct {
.clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
.f = window_copy_cmd_scroll_middle
},
{ .command = "scroll-top",
.minargs = 0,
.maxargs = 0,
.clear = WINDOW_COPY_CMD_CLEAR_ALWAYS,
.f = window_copy_cmd_scroll_top
},
{ .command = "scroll-up",
.minargs = 0,
.maxargs = 0,