diff options
Diffstat (limited to 'src/frame.c')
| -rw-r--r-- | src/frame.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/frame.c b/src/frame.c index 27e2210..a125ce6 100644 --- a/src/frame.c +++ b/src/frame.c @@ -961,6 +961,40 @@ size_t pos_trail_to_offset(Paragraph *para, size_t offs, int trail) } +int position_editable(struct frame *fr, struct edit_pos cp) +{ + Paragraph *para; + int run; + size_t paraoffs; + + if ( fr == NULL ) { + fprintf(stderr, "Frame is NULL.\n"); + return 0; + } + + if ( cp.para >= fr->n_paras ) { + fprintf(stderr, "Paragraph number is too high!\n"); + return 0; + } + + para = fr->paras[cp.para]; + + if ( para->scblock != para->rscblock ) { + fprintf(stderr, "Paragraph is not editable.\n"); + return 0; + } + + paraoffs = pos_trail_to_offset(para, cp.pos, cp.trail); + run = which_run(para, paraoffs); + if ( run == para->n_runs ) { + fprintf(stderr, "Couldn't find run!\n"); + return 0; + } + + return (para->runs[run].scblock == para->runs[run].rscblock); +} + + void insert_text_in_paragraph(Paragraph *para, size_t offs, const char *t) { int nrun; @@ -1391,6 +1425,11 @@ void delete_text_from_frame(struct frame *fr, struct edit_pos p1, struct edit_po sort_positions(&p1, &p2); + if ( !position_editable(fr, p1) || !position_editable(fr, p2) ) { + fprintf(stderr, "Block delete outside editable region\n"); + return; + } + /* Find SC positions for start and end */ p1scblock = pos_to_scblock(fr, p1, &type1); p2scblock = pos_to_scblock(fr, p2, &type2); |