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term: add term_scrollback_to_text() and term_view_to_text()

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These functions extract the current view, or the entire scrollback as
an UTF-8 encoded byte buffer.
This commit is contained in:
Daniel Eklöf 2020-07-15 11:33:37 +02:00
parent e6acafa118
commit 4d17423ed1
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GPG key ID: 5BBD4992C116573F
2 changed files with 62 additions and 2 deletions
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58
terminal.c
View file

@ -22,6 +22,7 @@
#include "async.h"
#include "config.h"
#include "extract.h"
#include "grid.h"
#include "quirks.h"
#include "reaper.h"
@ -2472,3 +2473,60 @@ term_surface_kind(const struct terminal *term, const struct wl_surface *surface)
else
return TERM_SURF_NONE;
}
static bool
rows_to_text(const struct terminal *term, int start, int end,
char **text, size_t *len)
{
struct extraction_context *ctx = extract_begin(SELECTION_NONE);
if (ctx == NULL)
return false;
for (size_t r = start;
r != ((end + 1) & (term->grid->num_rows - 1));
r = (r + 1) & (term->grid->num_rows - 1))
{
const struct row *row = term->grid->rows[r];
assert(row != NULL);
for (int c = 0; c < term->cols; c++)
if (!extract_one(term, row, &row->cells[c], c, ctx))
goto out;
}
out:
return extract_finish(ctx, text, len);
}
bool
term_scrollback_to_text(const struct terminal *term, char **text, size_t *len)
{
int start = term->grid->offset + term->rows;
int end = term->grid->offset + term->rows - 1;
/* If scrollback isn't full yet, this may be NULL, so scan forward
* until we find the first non-NULL row */
while (term->grid->rows[start] == NULL) {
start++;
start &= term->grid->num_rows - 1;
}
if (end < 0)
end += term->grid->num_rows;
while (term->grid->rows[end] == NULL) {
end--;
if (end < 0)
end += term->grid->num_rows;
}
return rows_to_text(term, start, end, text, len);
}
bool
term_view_to_text(const struct terminal *term, char **text, size_t *len)
{
int start = grid_row_absolute_in_view(term->grid, 0);
int end = grid_row_absolute_in_view(term->grid, term->rows - 1);
return rows_to_text(term, start, end, text, len);
}

6
terminal.h
View file

@ -543,5 +543,7 @@ void term_disable_app_sync_updates(struct terminal *term);
enum term_surface term_surface_kind(
const struct terminal *term, const struct wl_surface *surface);
bool term_scrollback_to_text(const struct terminal *term, wchar_t **text);
bool term_view_to_text(const struct terminal *term, wchar_t **text);
bool term_scrollback_to_text(
const struct terminal *term, char **text, size_t *len);
bool term_view_to_text(
const struct terminal *term, char **text, size_t *len);