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selection: selections can be made, and are rendered

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* Start selection on mouse button down
* Update selection on motion
* Button release cancels selection if there were no motion after start
* Renderer detects cells inside the selection and inverts their colors
This commit is contained in:
Daniel Eklöf 2019-07-10 20:57:09 +02:00
parent decb4503bf
commit 632790d5d8
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GPG key ID: 5BBD4992C116573F
4 changed files with 57 additions and 1 deletions
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28
render.c
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@ -42,6 +42,32 @@ render_cell(struct terminal *term, struct buffer *buf, const struct cell *cell,
double x = col * width;
double y = row * height;
bool is_selected = false;
if (term->selection.start.col != -1 && term->selection.end.col != -1) {
const struct coord *start = &term->selection.start;
const struct coord *end = &term->selection.end;
if (end->row < start->row || (end->row == start->row && end->col < start->col)) {
const struct coord *tmp = start;
start = end;
end = tmp;
}
assert(start->row <= end->row);
if (start->row == end->row) {
is_selected
= term->grid->view + row == start->row && col >= start->col && col <= end->col;
} else {
if (term->grid->view + row == start->row)
is_selected = col >= start->col;
else if (term->grid->view + row == end->row)
is_selected = col <= end->col;
else
is_selected = term->grid->view + row >= start->row && term->grid->view + row <= end->row;
}
}
const struct rgb *foreground = cell->attrs.have_foreground
? &cell->attrs.foreground
: !term->reverse ? &term->foreground : &term->background;
@ -50,7 +76,7 @@ render_cell(struct terminal *term, struct buffer *buf, const struct cell *cell,
: !term->reverse ? &term->background : &term->foreground;
/* If *one* is set, we reverse */
if (has_cursor ^ cell->attrs.reverse) {
if (has_cursor ^ cell->attrs.reverse ^ is_selected) {
const struct rgb *swap = foreground;
foreground = background;
background = swap;