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terminal.c: factor out the graphic-character display.
I'm about to want to implement an escape sequence that causes a graphic character to be printed, which means I'll need the code that does so to be in a separate routine that I can call easily, instead of buried a few loops deep in the middle of the main state machine.
This commit is contained in:
Simon Tatham
parent
6893f00e42
commit
a51dbf3f08
280
terminal.c
280
terminal.c
@ -2827,6 +2827,143 @@ static void term_print_finish(Terminal *term)
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term->printing = term->only_printing = FALSE;
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}
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static void term_display_graphic_char(Terminal *term, unsigned long c)
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{
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termline *cline = scrlineptr(term->curs.y);
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int width = 0;
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if (DIRECT_CHAR(c))
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width = 1;
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if (!width)
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width = (term->cjk_ambig_wide ?
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mk_wcwidth_cjk((unsigned int) c) :
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mk_wcwidth((unsigned int) c));
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if (term->wrapnext && term->wrap && width > 0) {
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cline->lattr |= LATTR_WRAPPED;
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if (term->curs.y == term->marg_b)
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scroll(term, term->marg_t, term->marg_b, 1, TRUE);
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else if (term->curs.y < term->rows - 1)
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term->curs.y++;
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term->curs.x = 0;
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term->wrapnext = FALSE;
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cline = scrlineptr(term->curs.y);
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}
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if (term->insert && width > 0)
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insch(term, width);
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if (term->selstate != NO_SELECTION) {
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pos cursplus = term->curs;
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incpos(cursplus);
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check_selection(term, term->curs, cursplus);
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}
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if (((c & CSET_MASK) == CSET_ASCII ||
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(c & CSET_MASK) == 0) && term->logctx)
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logtraffic(term->logctx, (unsigned char) c, LGTYP_ASCII);
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switch (width) {
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case 2:
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/*
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* If we're about to display a double-width character starting
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* in the rightmost column, then we do something special
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* instead. We must print a space in the last column of the
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* screen, then wrap; and we also set LATTR_WRAPPED2 which
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* instructs subsequent cut-and-pasting not only to splice
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* this line to the one after it, but to ignore the space in
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* the last character position as well. (Because what was
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* actually output to the terminal was presumably just a
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* sequence of CJK characters, and we don't want a space to be
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* pasted in the middle of those just because they had the
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* misfortune to start in the wrong parity column. xterm
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* concurs.)
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*/
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check_boundary(term, term->curs.x, term->curs.y);
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check_boundary(term, term->curs.x+2, term->curs.y);
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if (term->curs.x == term->cols-1) {
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copy_termchar(cline, term->curs.x,
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&term->erase_char);
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cline->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2;
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if (term->curs.y == term->marg_b)
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scroll(term, term->marg_t, term->marg_b,
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1, TRUE);
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else if (term->curs.y < term->rows - 1)
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term->curs.y++;
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term->curs.x = 0;
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cline = scrlineptr(term->curs.y);
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/* Now we must check_boundary again, of course. */
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check_boundary(term, term->curs.x, term->curs.y);
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check_boundary(term, term->curs.x+2, term->curs.y);
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}
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/* FULL-TERMCHAR */
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clear_cc(cline, term->curs.x);
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cline->chars[term->curs.x].chr = c;
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cline->chars[term->curs.x].attr = term->curr_attr;
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cline->chars[term->curs.x].truecolour =
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term->curr_truecolour;
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term->curs.x++;
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/* FULL-TERMCHAR */
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clear_cc(cline, term->curs.x);
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cline->chars[term->curs.x].chr = UCSWIDE;
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cline->chars[term->curs.x].attr = term->curr_attr;
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cline->chars[term->curs.x].truecolour =
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term->curr_truecolour;
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break;
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case 1:
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check_boundary(term, term->curs.x, term->curs.y);
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check_boundary(term, term->curs.x+1, term->curs.y);
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/* FULL-TERMCHAR */
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clear_cc(cline, term->curs.x);
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cline->chars[term->curs.x].chr = c;
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cline->chars[term->curs.x].attr = term->curr_attr;
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cline->chars[term->curs.x].truecolour =
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term->curr_truecolour;
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break;
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case 0:
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if (term->curs.x > 0) {
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int x = term->curs.x - 1;
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/* If we're in wrapnext state, the character to combine
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* with is _here_, not to our left. */
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if (term->wrapnext)
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x++;
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/*
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* If the previous character is UCSWIDE, back up another
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* one.
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*/
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if (cline->chars[x].chr == UCSWIDE) {
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assert(x > 0);
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x--;
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}
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add_cc(cline, x, c);
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seen_disp_event(term);
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}
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return;
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default:
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return;
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}
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term->curs.x++;
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if (term->curs.x == term->cols) {
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term->curs.x--;
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term->wrapnext = TRUE;
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if (term->wrap && term->vt52_mode) {
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cline->lattr |= LATTR_WRAPPED;
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if (term->curs.y == term->marg_b)
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scroll(term, term->marg_t, term->marg_b, 1, TRUE);
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else if (term->curs.y < term->rows - 1)
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term->curs.y++;
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term->curs.x = 0;
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term->wrapnext = FALSE;
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}
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}
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seen_disp_event(term);
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}
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/*
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* Remove everything currently in `inbuf' and stick it up on the
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* in-memory display. There's a big state machine in here to
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@ -3241,148 +3378,7 @@ static void term_out(Terminal *term)
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case TOPLEVEL:
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/* Only graphic characters get this far;
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* ctrls are stripped above */
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{
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termline *cline = scrlineptr(term->curs.y);
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int width = 0;
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if (DIRECT_CHAR(c))
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width = 1;
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if (!width)
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width = (term->cjk_ambig_wide ?
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mk_wcwidth_cjk((unsigned int) c) :
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mk_wcwidth((unsigned int) c));
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if (term->wrapnext && term->wrap && width > 0) {
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cline->lattr |= LATTR_WRAPPED;
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if (term->curs.y == term->marg_b)
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scroll(term, term->marg_t, term->marg_b, 1, TRUE);
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else if (term->curs.y < term->rows - 1)
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term->curs.y++;
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term->curs.x = 0;
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term->wrapnext = FALSE;
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cline = scrlineptr(term->curs.y);
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}
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if (term->insert && width > 0)
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insch(term, width);
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if (term->selstate != NO_SELECTION) {
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pos cursplus = term->curs;
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incpos(cursplus);
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check_selection(term, term->curs, cursplus);
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}
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if (((c & CSET_MASK) == CSET_ASCII ||
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(c & CSET_MASK) == 0) &&
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term->logctx)
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logtraffic(term->logctx, (unsigned char) c,
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LGTYP_ASCII);
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switch (width) {
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case 2:
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/*
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* If we're about to display a double-width
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* character starting in the rightmost
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* column, then we do something special
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* instead. We must print a space in the
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* last column of the screen, then wrap;
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* and we also set LATTR_WRAPPED2 which
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* instructs subsequent cut-and-pasting not
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* only to splice this line to the one
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* after it, but to ignore the space in the
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* last character position as well.
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* (Because what was actually output to the
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* terminal was presumably just a sequence
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* of CJK characters, and we don't want a
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* space to be pasted in the middle of
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* those just because they had the
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* misfortune to start in the wrong parity
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* column. xterm concurs.)
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*/
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check_boundary(term, term->curs.x, term->curs.y);
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check_boundary(term, term->curs.x+2, term->curs.y);
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if (term->curs.x == term->cols-1) {
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copy_termchar(cline, term->curs.x,
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&term->erase_char);
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cline->lattr |= LATTR_WRAPPED | LATTR_WRAPPED2;
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if (term->curs.y == term->marg_b)
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scroll(term, term->marg_t, term->marg_b,
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1, TRUE);
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else if (term->curs.y < term->rows - 1)
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term->curs.y++;
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term->curs.x = 0;
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cline = scrlineptr(term->curs.y);
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/* Now we must check_boundary again, of course. */
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check_boundary(term, term->curs.x, term->curs.y);
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check_boundary(term, term->curs.x+2, term->curs.y);
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}
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/* FULL-TERMCHAR */
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clear_cc(cline, term->curs.x);
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cline->chars[term->curs.x].chr = c;
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cline->chars[term->curs.x].attr = term->curr_attr;
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cline->chars[term->curs.x].truecolour =
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term->curr_truecolour;
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term->curs.x++;
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/* FULL-TERMCHAR */
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clear_cc(cline, term->curs.x);
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cline->chars[term->curs.x].chr = UCSWIDE;
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cline->chars[term->curs.x].attr = term->curr_attr;
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cline->chars[term->curs.x].truecolour =
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term->curr_truecolour;
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break;
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case 1:
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check_boundary(term, term->curs.x, term->curs.y);
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check_boundary(term, term->curs.x+1, term->curs.y);
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/* FULL-TERMCHAR */
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clear_cc(cline, term->curs.x);
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cline->chars[term->curs.x].chr = c;
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cline->chars[term->curs.x].attr = term->curr_attr;
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cline->chars[term->curs.x].truecolour =
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term->curr_truecolour;
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break;
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case 0:
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if (term->curs.x > 0) {
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int x = term->curs.x - 1;
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/* If we're in wrapnext state, the character
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* to combine with is _here_, not to our left. */
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if (term->wrapnext)
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x++;
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/*
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* If the previous character is
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* UCSWIDE, back up another one.
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*/
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if (cline->chars[x].chr == UCSWIDE) {
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assert(x > 0);
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x--;
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}
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add_cc(cline, x, c);
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seen_disp_event(term);
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}
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continue;
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default:
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continue;
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}
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term->curs.x++;
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if (term->curs.x == term->cols) {
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term->curs.x--;
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term->wrapnext = TRUE;
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if (term->wrap && term->vt52_mode) {
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cline->lattr |= LATTR_WRAPPED;
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if (term->curs.y == term->marg_b)
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scroll(term, term->marg_t, term->marg_b, 1, TRUE);
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else if (term->curs.y < term->rows - 1)
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term->curs.y++;
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term->curs.x = 0;
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term->wrapnext = FALSE;
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}
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}
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seen_disp_event(term);
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}
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term_display_graphic_char(term, c);
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break;
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case OSC_MAYBE_ST:
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