tsm: screen: implement selection extraction
This adds a new helper that returns the UTF8 encoded data of the selected parts in the tsm-screen object. There is still much to do and it isn't a nice solution. However, it's a proof-of-concept and works for now so we can just keep it. Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This commit is contained in:
David Herrmann
parent
742acfa093
commit
3ecd09ddd3
229
src/tsm_screen.c
229
src/tsm_screen.c
@ -1420,6 +1420,235 @@ void tsm_screen_selection_target(struct tsm_screen *con,
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selection_set(con, &con->sel_end, posx, posy);
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}
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/* TODO: tsm_ucs4_to_utf8 expects UCS4 characters, but a cell contains a
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* tsm-symbol (which can contain multiple UCS4 chars). Fix this when introducing
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* support for combining characters. */
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static unsigned int copy_line(struct line *line, char *buf,
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unsigned int start, unsigned int len)
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{
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unsigned int i, end;
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char *pos = buf;
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end = start + len;
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for (i = start; i < line->size && i < end; ++i) {
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if (i < line->size || !line->cells[i].ch)
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pos += tsm_ucs4_to_utf8(line->cells[i].ch, pos);
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else
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pos += tsm_ucs4_to_utf8(' ', pos);
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}
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return pos - buf;
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}
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/* TODO: This beast definitely needs some "beautification", however, it's meant
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* as a "proof-of-concept" so its enough for now. */
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int tsm_screen_selection_copy(struct tsm_screen *con, char **out)
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{
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unsigned int len, i;
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struct selection_pos *start, *end;
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struct line *iter;
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char *str, *pos;
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if (!con || !out)
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return -EINVAL;
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if (!con->sel_active)
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return -ENOENT;
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/* check whether sel_start or sel_end comes first */
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if (!con->sel_start.line && con->sel_start.y == SELECTION_TOP) {
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if (!con->sel_end.line && con->sel_end.y == SELECTION_TOP) {
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str = strdup("");
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if (!str)
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return -ENOMEM;
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*out = str;
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return 0;
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}
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start = &con->sel_start;
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end = &con->sel_end;
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} else if (!con->sel_end.line && con->sel_end.y == SELECTION_TOP) {
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start = &con->sel_end;
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end = &con->sel_start;
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} else if (con->sel_start.line && con->sel_end.line) {
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if (con->sel_start.line->sb_id < con->sel_end.line->sb_id) {
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start = &con->sel_start;
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end = &con->sel_end;
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} else if (con->sel_start.line->sb_id > con->sel_end.line->sb_id) {
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start = &con->sel_end;
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end = &con->sel_start;
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} else if (con->sel_start.x < con->sel_end.x) {
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start = &con->sel_start;
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end = &con->sel_end;
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} else {
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start = &con->sel_end;
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end = &con->sel_start;
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}
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} else if (con->sel_start.line) {
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start = &con->sel_start;
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end = &con->sel_end;
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} else if (con->sel_end.line) {
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start = &con->sel_end;
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end = &con->sel_start;
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} else if (con->sel_start.y < con->sel_end.y) {
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start = &con->sel_start;
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end = &con->sel_end;
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} else if (con->sel_start.y > con->sel_end.y) {
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start = &con->sel_end;
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end = &con->sel_start;
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} else if (con->sel_start.x < con->sel_end.x) {
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start = &con->sel_start;
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end = &con->sel_end;
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} else {
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start = &con->sel_end;
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end = &con->sel_start;
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}
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/* calculate size of buffer */
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len = 0;
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iter = start->line;
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if (!iter && start->y == SELECTION_TOP)
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iter = con->sb_first;
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while (iter) {
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if (iter == start->line && iter == end->line) {
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if (iter->size > start->x) {
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if (iter->size > end->x)
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len += end->x - start->x + 1;
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else
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len += iter->size - start->x;
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}
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break;
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} else if (iter == start->line) {
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if (iter->size > start->x)
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len += iter->size - start->x;
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} else if (iter == end->line) {
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if (iter->size > end->x)
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len += end->x + 1;
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else
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len += iter->size;
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break;
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} else {
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len += iter->size;
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}
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++len;
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iter = iter->next;
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}
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if (!end->line) {
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if (start->line || start->y == SELECTION_TOP)
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i = 0;
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else
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i = start->y;
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for ( ; i < con->size_y; ++i) {
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if (!start->line && start->y == i && end->y == i) {
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if (con->size_x > start->x) {
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if (con->size_x > end->x)
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len += end->x - start->x + 1;
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else
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len += con->size_x - start->x;
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}
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break;
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} else if (!start->line && start->y == i) {
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if (con->size_x > start->x)
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len += con->size_x - start->x;
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} else if (end->y == i) {
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if (con->size_x > end->x)
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len += end->x + 1;
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else
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len += con->size_x;
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break;
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} else {
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len += con->size_x;
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}
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++len;
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}
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}
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/* allocate buffer */
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len *= 4;
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++len;
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str = malloc(len);
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if (!str)
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return -ENOMEM;
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pos = str;
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/* copy data into buffer */
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iter = start->line;
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if (!iter && start->y == SELECTION_TOP)
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iter = con->sb_first;
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while (iter) {
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if (iter == start->line && iter == end->line) {
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if (iter->size > start->x) {
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if (iter->size > end->x)
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len = end->x - start->x + 1;
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else
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len = iter->size - start->x;
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pos += copy_line(iter, pos, start->x, len);
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}
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break;
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} else if (iter == start->line) {
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if (iter->size > start->x)
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pos += copy_line(iter, pos, start->x,
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iter->size - start->x);
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} else if (iter == end->line) {
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if (iter->size > end->x)
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len = end->x + 1;
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else
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len = iter->size;
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pos += copy_line(iter, pos, 0, len);
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break;
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} else {
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pos += copy_line(iter, pos, 0, iter->size);
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}
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*pos++ = '\n';
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iter = iter->next;
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}
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if (!end->line) {
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if (start->line || start->y == SELECTION_TOP)
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i = 0;
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else
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i = start->y;
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for ( ; i < con->size_y; ++i) {
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iter = con->lines[i];
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if (!start->line && start->y == i && end->y == i) {
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if (con->size_x > start->x) {
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if (con->size_x > end->x)
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len = end->x - start->x + 1;
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else
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len = con->size_x - start->x;
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pos += copy_line(iter, pos, start->x, len);
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}
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break;
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} else if (!start->line && start->y == i) {
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if (con->size_x > start->x)
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pos += copy_line(iter, pos, start->x,
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con->size_x - start->x);
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} else if (end->y == i) {
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if (con->size_x > end->x)
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len = end->x + 1;
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else
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len = con->size_x;
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pos += copy_line(iter, pos, 0, len);
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break;
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} else {
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pos += copy_line(iter, pos, 0, con->size_x);
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}
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*pos++ = '\n';
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}
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}
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/* return buffer */
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*pos = 0;
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*out = str;
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return pos - str;
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}
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void tsm_screen_draw(struct tsm_screen *con,
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tsm_screen_prepare_cb prepare_cb,
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tsm_screen_draw_cb draw_cb,
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@ -181,6 +181,7 @@ void tsm_screen_selection_start(struct tsm_screen *con,
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void tsm_screen_selection_target(struct tsm_screen *con,
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unsigned int posx,
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unsigned int posy);
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int tsm_screen_selection_copy(struct tsm_screen *con, char **out);
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void tsm_screen_draw(struct tsm_screen *con,
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tsm_screen_prepare_cb prepare_cb,
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