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cursor trail support cursor shape beam and underline

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Rick Choi
2024-10-13 14:36:10 +09:00
parent 761fb6f233
commit 45fb7b5026
1 changed files with 29 additions and 5 deletions
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34
kitty/cursor_trail.c
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@@ -5,17 +5,40 @@ norm(float x, float y) {
return sqrtf(x * x + y * y);
}
inline static bool
get_cursor_edge(float *left, float *right, float *top, float *bottom, Window *w) {
#define WD w->render_data
*left = WD.xstart + WD.screen->cursor_render_info.x * WD.dx;
*bottom = WD.ystart - (WD.screen->cursor_render_info.y + 1) * WD.dy;
switch (WD.screen->cursor->shape) {
case CURSOR_BLOCK:
*right = *left + WD.dx;
*top = *bottom + WD.dy;
return true;
case CURSOR_BEAM:
*right = *left + WD.dx / WD.screen->cell_size.width * OPT(cursor_beam_thickness);
*top = *bottom + WD.dy;
return true;
case CURSOR_UNDERLINE:
*right = *left + WD.dx;
*top = *bottom + WD.dy / WD.screen->cell_size.height * OPT(cursor_underline_thickness);
return true;
case CURSOR_HOLLOW:
// TODO - implement
default:
return false;
}
}
bool
update_cursor_trail(CursorTrail *ct, Window *w, monotonic_t now) {
#define WD w->render_data
// the trail corners move towards the cursor corner at a speed proportional to their distance from the cursor corner.
// equivalent to exponential ease out animation.
static const int ci[4][2] = {{1, 0}, {1, 1}, {0, 1}, {0, 0}};
float cursor_edge_x[2], cursor_edge_y[2];
cursor_edge_x[0] = WD.xstart + WD.screen->cursor_render_info.x * WD.dx;
cursor_edge_x[1] = cursor_edge_x[0] + WD.dx;
cursor_edge_y[0] = WD.ystart - WD.screen->cursor_render_info.y * WD.dy;
cursor_edge_y[1] = cursor_edge_y[0] - WD.dy;
if (!get_cursor_edge(cursor_edge_x, cursor_edge_x + 1, cursor_edge_y, cursor_edge_y + 1, w)) {
return false;
}
// todo - make these configurable
// the decay time for the trail to reach 1/1024 of its distance from the cursor corner
@@ -54,5 +77,6 @@ update_cursor_trail(CursorTrail *ct, Window *w, monotonic_t now) {
return true;
}
}
#undef WD
return false;
}