diff options
Diffstat (limited to 'src/libvterm/src/state.c')
| -rw-r--r-- | src/libvterm/src/state.c | 1851 |
1 files changed, 1851 insertions, 0 deletions
diff --git a/src/libvterm/src/state.c b/src/libvterm/src/state.c new file mode 100644 index 000000000..5b777c909 --- /dev/null +++ b/src/libvterm/src/state.c @@ -0,0 +1,1851 @@ +#include "vterm_internal.h" + +#include <stdio.h> +#include <string.h> + +#define strneq(a,b,n) (strncmp(a,b,n)==0) + +#if defined(DEBUG) && DEBUG > 1 +# define DEBUG_GLYPH_COMBINE +#endif + +/* Some convenient wrappers to make callback functions easier */ + +static void putglyph(VTermState *state, const uint32_t chars[], int width, VTermPos pos) +{ + VTermGlyphInfo info; + info.chars = chars; + info.width = width; + info.protected_cell = state->protected_cell; + info.dwl = state->lineinfo[pos.row].doublewidth; + info.dhl = state->lineinfo[pos.row].doubleheight; + + if(state->callbacks && state->callbacks->putglyph) + if((*state->callbacks->putglyph)(&info, pos, state->cbdata)) + return; + + DEBUG_LOG3("libvterm: Unhandled putglyph U+%04x at (%d,%d)\n", chars[0], pos.col, pos.row); +} + +static void updatecursor(VTermState *state, VTermPos *oldpos, int cancel_phantom) +{ + if(state->pos.col == oldpos->col && state->pos.row == oldpos->row) + return; + + if(cancel_phantom) + state->at_phantom = 0; + + if(state->callbacks && state->callbacks->movecursor) + if((*state->callbacks->movecursor)(state->pos, *oldpos, state->mode.cursor_visible, state->cbdata)) + return; +} + +static void erase(VTermState *state, VTermRect rect, int selective) +{ + if(state->callbacks && state->callbacks->erase) + if((*state->callbacks->erase)(rect, selective, state->cbdata)) + return; +} + +static VTermState *vterm_state_new(VTerm *vt) +{ + VTermState *state = vterm_allocator_malloc(vt, sizeof(VTermState)); + + state->vt = vt; + + state->rows = vt->rows; + state->cols = vt->cols; + + state->mouse_col = 0; + state->mouse_row = 0; + state->mouse_buttons = 0; + + state->mouse_protocol = MOUSE_X10; + + state->callbacks = NULL; + state->cbdata = NULL; + + vterm_state_newpen(state); + + state->bold_is_highbright = 0; + + return state; +} + +INTERNAL void vterm_state_free(VTermState *state) +{ + vterm_allocator_free(state->vt, state->tabstops); + vterm_allocator_free(state->vt, state->lineinfo); + vterm_allocator_free(state->vt, state->combine_chars); + vterm_allocator_free(state->vt, state); +} + +static void scroll(VTermState *state, VTermRect rect, int downward, int rightward) +{ + int rows; + int cols; + if(!downward && !rightward) + return; + + rows = rect.end_row - rect.start_row; + if(downward > rows) + downward = rows; + else if(downward < -rows) + downward = -rows; + + cols = rect.end_col - rect.start_col; + if(rightward > cols) + rightward = cols; + else if(rightward < -cols) + rightward = -cols; + + /* Update lineinfo if full line */ + if(rect.start_col == 0 && rect.end_col == state->cols && rightward == 0) { + int height = rect.end_row - rect.start_row - abs(downward); + + if(downward > 0) + memmove(state->lineinfo + rect.start_row, + state->lineinfo + rect.start_row + downward, + height * sizeof(state->lineinfo[0])); + else + memmove(state->lineinfo + rect.start_row - downward, + state->lineinfo + rect.start_row, + height * sizeof(state->lineinfo[0])); + } + + if(state->callbacks && state->callbacks->scrollrect) + if((*state->callbacks->scrollrect)(rect, downward, rightward, state->cbdata)) + return; + + if(state->callbacks) + vterm_scroll_rect(rect, downward, rightward, + state->callbacks->moverect, state->callbacks->erase, state->cbdata); +} + +static void linefeed(VTermState *state) +{ + if(state->pos.row == SCROLLREGION_BOTTOM(state) - 1) { + VTermRect rect; + rect.start_row = state->scrollregion_top; + rect.end_row = SCROLLREGION_BOTTOM(state); + rect.start_col = SCROLLREGION_LEFT(state); + rect.end_col = SCROLLREGION_RIGHT(state); + + scroll(state, rect, 1, 0); + } + else if(state->pos.row < state->rows-1) + state->pos.row++; +} + +static void grow_combine_buffer(VTermState *state) +{ + size_t new_size = state->combine_chars_size * 2; + uint32_t *new_chars = vterm_allocator_malloc(state->vt, new_size * sizeof(new_chars[0])); + + memcpy(new_chars, state->combine_chars, state->combine_chars_size * sizeof(new_chars[0])); + + vterm_allocator_free(state->vt, state->combine_chars); + + state->combine_chars = new_chars; + state->combine_chars_size = new_size; +} + +static void set_col_tabstop(VTermState *state, int col) +{ + unsigned char mask = 1 << (col & 7); + state->tabstops[col >> 3] |= mask; +} + +static void clear_col_tabstop(VTermState *state, int col) +{ + unsigned char mask = 1 << (col & 7); + state->tabstops[col >> 3] &= ~mask; +} + +static int is_col_tabstop(VTermState *state, int col) +{ + unsigned char mask = 1 << (col & 7); + return state->tabstops[col >> 3] & mask; +} + +static int is_cursor_in_scrollregion(const VTermState *state) +{ + if(state->pos.row < state->scrollregion_top || + state->pos.row >= SCROLLREGION_BOTTOM(state)) + return 0; + if(state->pos.col < SCROLLREGION_LEFT(state) || + state->pos.col >= SCROLLREGION_RIGHT(state)) + return 0; + + return 1; +} + +static void tab(VTermState *state, int count, int direction) +{ + while(count > 0) { + if(direction > 0) { + if(state->pos.col >= THISROWWIDTH(state)-1) + return; + + state->pos.col++; + } + else if(direction < 0) { + if(state->pos.col < 1) + return; + + state->pos.col--; + } + + if(is_col_tabstop(state, state->pos.col)) + count--; + } +} + +#define NO_FORCE 0 +#define FORCE 1 + +#define DWL_OFF 0 +#define DWL_ON 1 + +#define DHL_OFF 0 +#define DHL_TOP 1 +#define DHL_BOTTOM 2 + +static void set_lineinfo(VTermState *state, int row, int force, int dwl, int dhl) +{ + VTermLineInfo info = state->lineinfo[row]; + + if(dwl == DWL_OFF) + info.doublewidth = DWL_OFF; + else if(dwl == DWL_ON) + info.doublewidth = DWL_ON; + /* else -1 to ignore */ + + if(dhl == DHL_OFF) + info.doubleheight = DHL_OFF; + else if(dhl == DHL_TOP) + info.doubleheight = DHL_TOP; + else if(dhl == DHL_BOTTOM) + info.doubleheight = DHL_BOTTOM; + + if((state->callbacks && + state->callbacks->setlineinfo && + (*state->callbacks->setlineinfo)(row, &info, state->lineinfo + row, state->cbdata)) + || force) + state->lineinfo[row] = info; +} + +static int on_text(const char bytes[], size_t len, void *user) +{ + VTermState *state = user; + uint32_t *codepoints; + int npoints = 0; + size_t eaten = 0; + VTermEncodingInstance *encoding; + int i = 0; + + VTermPos oldpos = state->pos; + + /* We'll have at most len codepoints */ + codepoints = vterm_allocator_malloc(state->vt, len * sizeof(uint32_t)); + + encoding = + state->gsingle_set ? &state->encoding[state->gsingle_set] : + !(bytes[eaten] & 0x80) ? &state->encoding[state->gl_set] : + state->vt->mode.utf8 ? &state->encoding_utf8 : + &state->encoding[state->gr_set]; + + (*encoding->enc->decode)(encoding->enc, encoding->data, + codepoints, &npoints, state->gsingle_set ? 1 : len, + bytes, &eaten, len); + + /* There's a chance an encoding (e.g. UTF-8) hasn't found enough bytes yet + * for even a single codepoint + */ + if(!npoints) + { + vterm_allocator_free(state->vt, codepoints); + return 0; + } + + if(state->gsingle_set && npoints) + state->gsingle_set = 0; + + /* This is a combining char. that needs to be merged with the previous + * glyph output */ + if(vterm_unicode_is_combining(codepoints[i])) { + /* See if the cursor has moved since */ + if(state->pos.row == state->combine_pos.row && state->pos.col == state->combine_pos.col + state->combine_width) { +#ifdef DEBUG_GLYPH_COMBINE + int printpos; + printf("DEBUG: COMBINING SPLIT GLYPH of chars {"); + for(printpos = 0; state->combine_chars[printpos]; printpos++) + printf("U+%04x ", state->combine_chars[printpos]); + printf("} + {"); +#endif + + /* Find where we need to append these combining chars */ + int saved_i = 0; + while(state->combine_chars[saved_i]) + saved_i++; + + /* Add extra ones */ + while(i < npoints && vterm_unicode_is_combining(codepoints[i])) { + if(saved_i >= (int)state->combine_chars_size) + grow_combine_buffer(state); + state->combine_chars[saved_i++] = codepoints[i++]; + } + if(saved_i >= (int)state->combine_chars_size) + grow_combine_buffer(state); + state->combine_chars[saved_i] = 0; + +#ifdef DEBUG_GLYPH_COMBINE + for(; state->combine_chars[printpos]; printpos++) + printf("U+%04x ", state->combine_chars[printpos]); + printf("}\n"); +#endif + + /* Now render it */ + putglyph(state, state->combine_chars, state->combine_width, state->combine_pos); + } + else { + DEBUG_LOG("libvterm: TODO: Skip over split char+combining\n"); + } + } + + for(; i < npoints; i++) { + /* Try to find combining characters following this */ + int glyph_starts = i; + int glyph_ends; + int width = 0; + uint32_t *chars; + + for(glyph_ends = i + 1; glyph_ends < npoints; glyph_ends++) + if(!vterm_unicode_is_combining(codepoints[glyph_ends])) + break; + + chars = vterm_allocator_malloc(state->vt, (glyph_ends - glyph_starts + 1) * sizeof(uint32_t)); + + for( ; i < glyph_ends; i++) { + int this_width; + chars[i - glyph_starts] = codepoints[i]; + this_width = vterm_unicode_width(codepoints[i]); +#ifdef DEBUG + if(this_width < 0) { + fprintf(stderr, "Text with negative-width codepoint U+%04x\n", codepoints[i]); + abort(); + } +#endif + width += this_width; + } + + chars[glyph_ends - glyph_starts] = 0; + i--; + +#ifdef DEBUG_GLYPH_COMBINE + int printpos; + printf("DEBUG: COMBINED GLYPH of %d chars {", glyph_ends - glyph_starts); + for(printpos = 0; printpos < glyph_ends - glyph_starts; printpos++) + printf("U+%04x ", chars[printpos]); + printf("}, onscreen width %d\n", width); +#endif + + if(state->at_phantom || state->pos.col + width > THISROWWIDTH(state)) { + linefeed(state); + state->pos.col = 0; + state->at_phantom = 0; + } + + if(state->mode.insert) { + /* TODO: This will be a little inefficient for large bodies of text, as + * it'll have to 'ICH' effectively before every glyph. We should scan + * ahead and ICH as many times as required + */ + VTermRect rect; + rect.start_row = state->pos.row; + rect.end_row = state->pos.row + 1; + rect.start_col = state->pos.col; + rect.end_col = THISROWWIDTH(state); + scroll(state, rect, 0, -1); + } + + putglyph(state, chars, width, state->pos); + + if(i == npoints - 1) { + /* End of the buffer. Save the chars in case we have to combine with + * more on the next call */ + int save_i; + for(save_i = 0; chars[save_i]; save_i++) { + if(save_i >= (int)state->combine_chars_size) + grow_combine_buffer(state); + state->combine_chars[save_i] = chars[save_i]; + } + if(save_i >= (int)state->combine_chars_size) + grow_combine_buffer(state); + state->combine_chars[save_i] = 0; + state->combine_width = width; + state->combine_pos = state->pos; + } + + if(state->pos.col + width >= THISROWWIDTH(state)) { + if(state->mode.autowrap) + state->at_phantom = 1; + } + else { + state->pos.col += width; + } + vterm_allocator_free(state->vt, chars); + } + + updatecursor(state, &oldpos, 0); + +#ifdef DEBUG + if(state->pos.row < 0 || state->pos.row >= state->rows || + state->pos.col < 0 || state->pos.col >= state->cols) { + fprintf(stderr, "Position out of bounds after text: (%d,%d)\n", + state->pos.row, state->pos.col); + abort(); + } +#endif + + vterm_allocator_free(state->vt, codepoints); + return eaten; +} + +static int on_control(unsigned char control, void *user) +{ + VTermState *state = user; + + VTermPos oldpos = state->pos; + + switch(control) { + case 0x07: /* BEL - ECMA-48 8.3.3 */ + if(state->callbacks && state->callbacks->bell) + (*state->callbacks->bell)(state->cbdata); + break; + + case 0x08: /* BS - ECMA-48 8.3.5 */ + if(state->pos.col > 0) + state->pos.col--; + break; + + case 0x09: /* HT - ECMA-48 8.3.60 */ + tab(state, 1, +1); + break; + + case 0x0a: /* LF - ECMA-48 8.3.74 */ + case 0x0b: /* VT */ + case 0x0c: /* FF */ + linefeed(state); + if(state->mode.newline) + state->pos.col = 0; + break; + + case 0x0d: /* CR - ECMA-48 8.3.15 */ + state->pos.col = 0; + break; + + case 0x0e: /* LS1 - ECMA-48 8.3.76 */ + state->gl_set = 1; + break; + + case 0x0f: /* LS0 - ECMA-48 8.3.75 */ + state->gl_set = 0; + break; + + case 0x84: /* IND - DEPRECATED but implemented for completeness */ + linefeed(state); + break; + + case 0x85: /* NEL - ECMA-48 8.3.86 */ + linefeed(state); + state->pos.col = 0; + break; + + case 0x88: /* HTS - ECMA-48 8.3.62 */ + set_col_tabstop(state, state->pos.col); + break; + + case 0x8d: /* RI - ECMA-48 8.3.104 */ + if(state->pos.row == state->scrollregion_top) { + VTermRect rect; + rect.start_row = state->scrollregion_top; + rect.end_row = SCROLLREGION_BOTTOM(state); + rect.start_col = SCROLLREGION_LEFT(state); + rect.end_col = SCROLLREGION_RIGHT(state); + + scroll(state, rect, -1, 0); + } + else if(state->pos.row > 0) + state->pos.row--; + break; + + case 0x8e: /* SS2 - ECMA-48 8.3.141 */ + state->gsingle_set = 2; + break; + + case 0x8f: /* SS3 - ECMA-48 8.3.142 */ + state->gsingle_set = 3; + break; + + default: + if(state->fallbacks && state->fallbacks->control) + if((*state->fallbacks->control)(control, state->fbdata)) + return 1; + + return 0; + } + + updatecursor(state, &oldpos, 1); + +#ifdef DEBUG + if(state->pos.row < 0 || state->pos.row >= state->rows || + state->pos.col < 0 || state->pos.col >= state->cols) { + fprintf(stderr, "Position out of bounds after Ctrl %02x: (%d,%d)\n", + control, state->pos.row, state->pos.col); + abort(); + } +#endif + + return 1; +} + +static int settermprop_bool(VTermState *state, VTermProp prop, int v) +{ + VTermValue val; + val.boolean = v; + return vterm_state_set_termprop(state, prop, &val); +} + +static int settermprop_int(VTermState *state, VTermProp prop, int v) +{ + VTermValue val; + val.number = v; + return vterm_state_set_termprop(state, prop, &val); +} + +static int settermprop_string(VTermState *state, VTermProp prop, const char *str, size_t len) +{ + char *strvalue; + int r; + VTermValue val; + strvalue = vterm_allocator_malloc(state->vt, (len+1) * sizeof(char)); + strncpy(strvalue, str, len); + strvalue[len] = 0; + + val.string = strvalue; + r = vterm_state_set_termprop(state, prop, &val); + vterm_allocator_free(state->vt, strvalue); + return r; +} + +static void savecursor(VTermState *state, int save) +{ + if(save) { + state->saved.pos = state->pos; + state->saved.mode.cursor_visible = state->mode.cursor_visible; + state->saved.mode.cursor_blink = state->mode.cursor_blink; + state->saved.mode.cursor_shape = state->mode.cursor_shape; + + vterm_state_savepen(state, 1); + } + else { + VTermPos oldpos = state->pos; + + state->pos = state->saved.pos; + + settermprop_bool(state, VTERM_PROP_CURSORVISIBLE, state->saved.mode.cursor_visible); + settermprop_bool(state, VTERM_PROP_CURSORBLINK, state->saved.mode.cursor_blink); + settermprop_int (state, VTERM_PROP_CURSORSHAPE, state->saved.mode.cursor_shape); + + vterm_state_savepen(state, 0); + + updatecursor(state, &oldpos, 1); + } +} + +static int on_escape(const char *bytes, size_t len, void *user) +{ + VTermState *state = user; + + /* Easier to decode this from the first byte, even though the final + * byte terminates it + */ + switch(bytes[0]) { + case ' ': + if(len != 2) + return 0; + + switch(bytes[1]) { + case 'F': /* S7C1T */ + state->vt->mode.ctrl8bit = 0; + break; + + case 'G': /* S8C1T */ + state->vt->mode.ctrl8bit = 1; + break; + + default: + return 0; + } + return 2; + + case '#': + if(len != 2) + return 0; + + switch(bytes[1]) { + case '3': /* DECDHL top */ + if(state->mode.leftrightmargin) + break; + set_lineinfo(state, state->pos.row, NO_FORCE, DWL_ON, DHL_TOP); + break; + + case '4': /* DECDHL bottom */ + if(state->mode.leftrightmargin) + break; + set_lineinfo(state, state->pos.row, NO_FORCE, DWL_ON, DHL_BOTTOM); + break; + + case '5': /* DECSWL */ + if(state->mode.leftrightmargin) + break; + set_lineinfo(state, state->pos.row, NO_FORCE, DWL_OFF, DHL_OFF); + break; + + case '6': /* DECDWL */ + if(state->mode.leftrightmargin) + break; + set_lineinfo(state, state->pos.row, NO_FORCE, DWL_ON, DHL_OFF); + break; + + case '8': /* DECALN */ + { + VTermPos pos; + uint32_t E[] = { 'E', 0 }; + for(pos.row = 0; pos.row < state->rows; pos.row++) + for(pos.col = 0; pos.col < ROWWIDTH(state, pos.row); pos.col++) + putglyph(state, E, 1, pos); + break; + } + + default: + return 0; + } + return 2; + + case '(': case ')': case '*': case '+': /* SCS */ + if(len != 2) + return 0; + + { + int setnum = bytes[0] - 0x28; + VTermEncoding *newenc = vterm_lookup_encoding(ENC_SINGLE_94, bytes[1]); + + if(newenc) { + state->encoding[setnum].enc = newenc; + + if(newenc->init) + (*newenc->init)(newenc, state->encoding[setnum].data); + } + } + + return 2; + + case '7': /* DECSC */ + savecursor(state, 1); + return 1; + + case '8': /* DECRC */ + savecursor(state, 0); + return 1; + + case '<': /* Ignored by VT100. Used in VT52 mode to switch up to VT100 */ + return 1; + + case '=': /* DECKPAM */ + state->mode.keypad = 1; + return 1; + + case '>': /* DECKPNM */ + state->mode.keypad = 0; + return 1; + + case 'c': /* RIS - ECMA-48 8.3.105 */ + { + VTermPos oldpos = state->pos; + vterm_state_reset(state, 1); + if(state->callbacks && state->callbacks->movecursor) + (*state->callbacks->movecursor)(state->pos, oldpos, state->mode.cursor_visible, state->cbdata); + return 1; + } + + case 'n': /* LS2 - ECMA-48 8.3.78 */ + state->gl_set = 2; + return 1; + + case 'o': /* LS3 - ECMA-48 8.3.80 */ + state->gl_set = 3; + return 1; + + case '~': /* LS1R - ECMA-48 8.3.77 */ + state->gr_set = 1; + return 1; + + case '}': /* LS2R - ECMA-48 8.3.79 */ + state->gr_set = 2; + return 1; + + case '|': /* LS3R - ECMA-48 8.3.81 */ + state->gr_set = 3; + return 1; + + default: + return 0; + } +} + +static void set_mode(VTermState *state, int num, int val) +{ + switch(num) { + case 4: /* IRM - ECMA-48 7.2.10 */ + state->mode.insert = val; + break; + + case 20: /* LNM - ANSI X3.4-1977 */ + state->mode.newline = val; + break; + + default: + DEBUG_LOG1("libvterm: Unknown mode %d\n", num); + return; + } +} + +static void set_dec_mode(VTermState *state, int num, int val) +{ + switch(num) { + case 1: + state->mode.cursor = val; + break; + + case 5: /* DECSCNM - screen mode */ + settermprop_bool(state, VTERM_PROP_REVERSE, val); + break; + + case 6: /* DECOM - origin mode */ + { + VTermPos oldpos = state->pos; + state->mode.origin = val; + state->pos.row = state->mode.origin ? state->scrollregion_top : 0; + state->pos.col = state->mode.origin ? SCROLLREGION_LEFT(state) : 0; + updatecursor(state, &oldpos, 1); + } + break; + + case 7: + state->mode.autowrap = val; + break; + + case 12: + settermprop_bool(state, VTERM_PROP_CURSORBLINK, val); + break; + + case 25: + settermprop_bool(state, VTERM_PROP_CURSORVISIBLE, val); + break; + + case 69: /* DECVSSM - vertical split screen mode */ + /* DECLRMM - left/right margin mode */ + state->mode.leftrightmargin = val; + if(val) { + int row; + + /* Setting DECVSSM must clear doublewidth/doubleheight state of every line */ + for(row = 0; row < state->rows; row++) + set_lineinfo(state, row, FORCE, DWL_OFF, DHL_OFF); + } + + break; + + case 1000: + case 1002: + case 1003: + settermprop_int(state, VTERM_PROP_MOUSE, + !val ? VTERM_PROP_MOUSE_NONE : + (num == 1000) ? VTERM_PROP_MOUSE_CLICK : + (num == 1002) ? VTERM_PROP_MOUSE_DRAG : + VTERM_PROP_MOUSE_MOVE); + break; + + case 1005: + state->mouse_protocol = val ? MOUSE_UTF8 : MOUSE_X10; + break; + + case 1006: + state->mouse_protocol = val ? MOUSE_SGR : MOUSE_X10; + break; + + case 1015: + state->mouse_protocol = val ? MOUSE_RXVT : MOUSE_X10; + break; + + case 1047: + settermprop_bool(state, VTERM_PROP_ALTSCREEN, val); + break; + + case 1048: + savecursor(state, val); + break; + + case 1049: + settermprop_bool(state, VTERM_PROP_ALTSCREEN, val); + savecursor(state, val); + break; + + case 2004: + state->mode.bracketpaste = val; + break; + + default: + DEBUG_LOG1("libvterm: Unknown DEC mode %d\n", num); + return; + } +} + +static void request_dec_mode(VTermState *state, int num) +{ + int reply; + + switch(num) { + case 1: + reply = state->mode.cursor; + break; + + case 5: + reply = state->mode.screen; + break; + + case 6: + reply = state->mode.origin; + break; + + case 7: + reply = state->mode.autowrap; + break; + + case 12: + reply = state->mode.cursor_blink; + break; + + case 25: + reply = state->mode.cursor_visible; + break; + + case 69: + reply = state->mode.leftrightmargin; + break; + + case 1000: + reply = state->mouse_flags == MOUSE_WANT_CLICK; + break; + + case 1002: + reply = state->mouse_flags == (MOUSE_WANT_CLICK|MOUSE_WANT_DRAG); + break; + + case 1003: + reply = state->mouse_flags == (MOUSE_WANT_CLICK|MOUSE_WANT_MOVE); + break; + + case 1005: + reply = state->mouse_protocol == MOUSE_UTF8; + break; + + case 1006: + reply = state->mouse_protocol == MOUSE_SGR; + break; + + case 1015: + reply = state->mouse_protocol == MOUSE_RXVT; + break; + + case 1047: + reply = state->mode.alt_screen; + break; + + case 2004: + reply = state->mode.bracketpaste; + + default: + vterm_push_output_sprintf_ctrl(state->vt, C1_CSI, "?%d;%d$y", num, 0); + return; + } + + vterm_push_output_sprintf_ctrl(state->vt, C1_CSI, "?%d;%d$y", num, reply ? 1 : 2); +} + +static int on_csi(const char *leader, const long args[], int argcount, const char *intermed, char command, void *user) +{ + VTermState *state = user; + int leader_byte = 0; + int intermed_byte = 0; + VTermPos oldpos = state->pos; + + /* Some temporaries for later code */ + int count, val; + int row, col; + VTermRect rect; + int selective; + + if(leader && leader[0]) { + if(leader[1]) /* longer than 1 char */ + return 0; + + switch(leader[0]) { + case '?': + case '>': + leader_byte = leader[0]; + break; + default: + return 0; + } + } + + if(intermed && intermed[0]) { + if(intermed[1]) /* longer than 1 char */ + return 0; + + switch(intermed[0]) { + case ' ': + case '"': + case '$': + case '\'': + intermed_byte = intermed[0]; + break; + default: + return 0; + } + } + + oldpos = state->pos; + +#define LBOUND(v,min) if((v) < (min)) (v) = (min) +#define UBOUND(v,max) if((v) > (max)) (v) = (max) + +#define LEADER(l,b) ((l << 8) | b) +#define INTERMED(i,b) ((i << 16) | b) + + switch(intermed_byte << 16 | leader_byte << 8 | command) { + case 0x40: /* ICH - ECMA-48 8.3.64 */ + count = CSI_ARG_COUNT(args[0]); + + if(!is_cursor_in_scrollregion(state)) + break; + + rect.start_row = state->pos.row; + rect.end_row = state->pos.row + 1; + rect.start_col = state->pos.col; + if(state->mode.leftrightmargin) + rect.end_col = SCROLLREGION_RIGHT(state); + else + rect.end_col = THISROWWIDTH(state); + + scroll(state, rect, 0, -count); + + break; + + case 0x41: /* CUU - ECMA-48 8.3.22 */ + count = CSI_ARG_COUNT(args[0]); + state->pos.row -= count; + state->at_phantom = 0; + break; + + case 0x42: /* CUD - ECMA-48 8.3.19 */ + count = CSI_ARG_COUNT(args[0]); + state->pos.row += count; + state->at_phantom = 0; + break; + + case 0x43: /* CUF - ECMA-48 8.3.20 */ + count = CSI_ARG_COUNT(args[0]); + state->pos.col += count; + state->at_phantom = 0; + break; + + case 0x44: /* CUB - ECMA-48 8.3.18 */ + count = CSI_ARG_COUNT(args[0]); + state->pos.col -= count; + state->at_phantom = 0; + break; + + case 0x45: /* CNL - ECMA-48 8.3.12 */ + count = CSI_ARG_COUNT(args[0]); + state->pos.col = 0; + state->pos.row += count; + state->at_phantom = 0; + break; + + case 0x46: /* CPL - ECMA-48 8.3.13 */ + count = CSI_ARG_COUNT(args[0]); + state->pos.col = 0; + state->pos.row -= count; + state->at_phantom = 0; + break; + + case 0x47: /* CHA - ECMA-48 8.3.9 */ + val = CSI_ARG_OR(args[0], 1); + state->pos.col = val-1; + state->at_phantom = 0; + break; + + case 0x48: /* CUP - ECMA-48 8.3.21 */ + row = CSI_ARG_OR(args[0], 1); + col = argcount < 2 || CSI_ARG_IS_MISSING(args[1]) ? 1 : CSI_ARG(args[1]); + /* zero-based */ + state->pos.row = row-1; + state->pos.col = col-1; + if(state->mode.origin) { + state->pos.row += state->scrollregion_top; + state->pos.col += SCROLLREGION_LEFT(state); + } + state->at_phantom = 0; + break; + + case 0x49: /* CHT - ECMA-48 8.3.10 */ + count = CSI_ARG_COUNT(args[0]); + tab(state, count, +1); + break; + + case 0x4a: /* ED - ECMA-48 8.3.39 */ + case LEADER('?', 0x4a): /* DECSED - Selective Erase in Display */ + selective = (leader_byte == '?'); + switch(CSI_ARG(args[0])) { + case CSI_ARG_MISSING: + case 0: + rect.start_row = state->pos.row; rect.end_row = state->pos.row + 1; + rect.start_col = state->pos.col; rect.end_col = state->cols; + if(rect.end_col > rect.start_col) + erase(state, rect, selective); + + rect.start_row = state->pos.row + 1; rect.end_row = state->rows; + rect.start_col = 0; + for(row = rect.start_row; row < rect.end_row; row++) + set_lineinfo(state, row, FORCE, DWL_OFF, DHL_OFF); + if(rect.end_row > rect.start_row) + erase(state, rect, selective); + break; + + case 1: + rect.start_row = 0; rect.end_row = state->pos.row; + rect.start_col = 0; rect.end_col = state->cols; + for(row = rect.start_row; row < rect.end_row; row++) + set_lineinfo(state, row, FORCE, DWL_OFF, DHL_OFF); + if(rect.end_col > rect.start_col) + erase(state, rect, selective); + + rect.start_row = state->pos.row; rect.end_row = state->pos.row + 1; + rect.end_col = state->pos.col + 1; + if(rect.end_row > rect.start_row) + erase(state, rect, selective); + break; + + case 2: + rect.start_row = 0; rect.end_row = state->rows; + rect.start_col = 0; rect.end_col = state->cols; + for(row = rect.start_row; row < rect.end_row; row++) + set_lineinfo(state, row, FORCE, DWL_OFF, DHL_OFF); + erase(state, rect, selective); + break; + } + break; + + case 0x4b: /* EL - ECMA-48 8.3.41 */ + case LEADER('?', 0x4b): /* DECSEL - Selective Erase in Line */ + selective = (leader_byte == '?'); + rect.start_row = state->pos.row; + rect.end_row = state->pos.row + 1; + + switch(CSI_ARG(args[0])) { + case CSI_ARG_MISSING: + case 0: + rect.start_col = state->pos.col; rect.end_col = THISROWWIDTH(state); break; + case 1: + rect.start_col = 0; rect.end_col = state->pos.col + 1; break; + case 2: + rect.start_col = 0; rect.end_col = THISROWWIDTH(state); break; + default: + return 0; + } + + if(rect.end_col > rect.start_col) + erase(state, rect, selective); + + break; + + case 0x4c: /* IL - ECMA-48 8.3.67 */ + count = CSI_ARG_COUNT(args[0]); + + if(!is_cursor_in_scrollregion(state)) + break; + + rect.start_row = state->pos.row; + rect.end_row = SCROLLREGION_BOTTOM(state); + rect.start_col = SCROLLREGION_LEFT(state); + rect.end_col = SCROLLREGION_RIGHT(state); + + scroll(state, rect, -count, 0); + + break; + + case 0x4d: /* DL - ECMA-48 8.3.32 */ + count = CSI_ARG_COUNT(args[0]); + + if(!is_cursor_in_scrollregion(state)) + break; + + rect.start_row = state->pos.row; + rect.end_row = SCROLLREGION_BOTTOM(state); + rect.start_col = SCROLLREGION_LEFT(state); + rect.end_col = SCROLLREGION_RIGHT(state); + + scroll(state, rect, count, 0); + + break; + + case 0x50: /* DCH - ECMA-48 8.3.26 */ + count = CSI_ARG_COUNT(args[0]); + + if(!is_cursor_in_scrollregion(state)) + break; + + rect.start_row = state->pos.row; + rect.end_row = state->pos.row + 1; + rect.start_col = state->pos.col; + if(state->mode.leftrightmargin) + rect.end_col = SCROLLREGION_RIGHT(state); + else + rect.end_col = THISROWWIDTH(state); + + scroll(state, rect, 0, count); + + break; + + case 0x53: /* SU - ECMA-48 8.3.147 */ + count = CSI_ARG_COUNT(args[0]); + + rect.start_row = state->scrollregion_top; + rect.end_row = SCROLLREGION_BOTTOM(state); + rect.start_col = SCROLLREGION_LEFT(state); + rect.end_col = SCROLLREGION_RIGHT(state); + + scroll(state, rect, count, 0); + + break; + + case 0x54: /* SD - ECMA-48 8.3.113 */ + count = CSI_ARG_COUNT(args[0]); + + rect.start_row = state->scrollregion_top; + rect.end_row = SCROLLREGION_BOTTOM(state); + rect.start_col = SCROLLREGION_LEFT(state); + rect.end_col = SCROLLREGION_RIGHT(state); + + scroll(state, rect, -count, 0); + + break; + + case 0x58: /* ECH - ECMA-48 8.3.38 */ + count = CSI_ARG_COUNT(args[0]); + + rect.start_row = state->pos.row; + rect.end_row = state->pos.row + 1; + rect.start_col = state->pos.col; + rect.end_col = state->pos.col + count; + UBOUND(rect.end_col, THISROWWIDTH(state)); + + erase(state, rect, 0); + break; + + case 0x5a: /* CBT - ECMA-48 8.3.7 */ + count = CSI_ARG_COUNT(args[0]); + tab(state, count, -1); + break; + + case 0x60: /* HPA - ECMA-48 8.3.57 */ + col = CSI_ARG_OR(args[0], 1); + state->pos.col = col-1; + state->at_phantom = 0; + break; + + case 0x61: /* HPR - ECMA-48 8.3.59 */ + count = CSI_ARG_COUNT(args[0]); + state->pos.col += count; + state->at_phantom = 0; + break; + + case 0x63: /* DA - ECMA-48 8.3.24 */ + val = CSI_ARG_OR(args[0], 0); + if(val == 0) + /* DEC VT100 response */ + vterm_push_output_sprintf_ctrl(state->vt, C1_CSI, "?1;2c"); + break; + + case LEADER('>', 0x63): /* DEC secondary Device Attributes */ + vterm_push_output_sprintf_ctrl(state->vt, C1_CSI, ">%d;%d;%dc", 0, 100, 0); + break; + + case 0x64: /* VPA - ECMA-48 8.3.158 */ + row = CSI_ARG_OR(args[0], 1); + state->pos.row = row-1; + if(state->mode.origin) + state->pos.row += state->scrollregion_top; + state->at_phantom = 0; + break; + + case 0x65: /* VPR - ECMA-48 8.3.160 */ + count = CSI_ARG_COUNT(args[0]); + state->pos.row += count; + state->at_phantom = 0; + break; + + case 0x66: /* HVP - ECMA-48 8.3.63 */ + row = CSI_ARG_OR(args[0], 1); + col = argcount < 2 || CSI_ARG_IS_MISSING(args[1]) ? 1 : CSI_ARG(args[1]); + /* zero-based */ + state->pos.row = row-1; + state->pos.col = col-1; + if(state->mode.origin) { + state->pos.row += state->scrollregion_top; + state->pos.col += SCROLLREGION_LEFT(state); + } + state->at_phantom = 0; + break; + + case 0x67: /* TBC - ECMA-48 8.3.154 */ + val = CSI_ARG_OR(args[0], 0); + + switch(val) { + case 0: + clear_col_tabstop(state, state->pos.col); + break; + case 3: + case 5: + for(col = 0; col < state->cols; col++) + clear_col_tabstop(state, col); + break; + case 1: + case 2: + case 4: + break; + /* TODO: 1, 2 and 4 aren't meaningful yet without line tab stops */ + default: + return 0; + } + break; + + case 0x68: /* SM - ECMA-48 8.3.125 */ + if(!CSI_ARG_IS_MISSING(args[0])) + set_mode(state, CSI_ARG(args[0]), 1); + break; + + case LEADER('?', 0x68): /* DEC private mode set */ + if(!CSI_ARG_IS_MISSING(args[0])) + set_dec_mode(state, CSI_ARG(args[0]), 1); + break; + + case 0x6a: /* HPB - ECMA-48 8.3.58 */ + count = CSI_ARG_COUNT(args[0]); + state->pos.col -= count; + state->at_phantom = 0; + break; + + case 0x6b: /* VPB - ECMA-48 8.3.159 */ + count = CSI_ARG_COUNT(args[0]); + state->pos.row -= count; + state->at_phantom = 0; + break; + + case 0x6c: /* RM - ECMA-48 8.3.106 */ + if(!CSI_ARG_IS_MISSING(args[0])) + set_mode(state, CSI_ARG(args[0]), 0); + break; + + case LEADER('?', 0x6c): /* DEC private mode reset */ + if(!CSI_ARG_IS_MISSING(args[0])) + set_dec_mode(state, CSI_ARG(args[0]), 0); + break; + + case 0x6d: /* SGR - ECMA-48 8.3.117 */ + vterm_state_setpen(state, args, argcount); + break; + + case 0x6e: /* DSR - ECMA-48 8.3.35 */ + case LEADER('?', 0x6e): /* DECDSR */ + val = CSI_ARG_OR(args[0], 0); + + { + char *qmark = (leader_byte == '?') ? "?" : ""; + + switch(val) { + case 0: case 1: case 2: case 3: case 4: + /* ignore - these are replies */ + break; + case 5: + vterm_push_output_sprintf_ctrl(state->vt, C1_CSI, "%s0n", qmark); + break; + case 6: /* CPR - cursor position report */ + vterm_push_output_sprintf_ctrl(state->vt, C1_CSI, "%s%d;%dR", qmark, state->pos.row + 1, state->pos.col + 1); + break; + } + } + break; + + + case LEADER('!', 0x70): /* DECSTR - DEC soft terminal reset */ + vterm_state_reset(state, 0); + break; + + case LEADER('?', INTERMED('$', 0x70)): + request_dec_mode(state, CSI_ARG(args[0])); + break; + + case INTERMED(' ', 0x71): /* DECSCUSR - DEC set cursor shape */ + val = CSI_ARG_OR(args[0], 1); + + switch(val) { + case 0: case 1: + settermprop_bool(state, VTERM_PROP_CURSORBLINK, 1); + settermprop_int (state, VTERM_PROP_CURSORSHAPE, VTERM_PROP_CURSORSHAPE_BLOCK); + break; + case 2: + settermprop_bool(state, VTERM_PROP_CURSORBLINK, 0); + settermprop_int (state, VTERM_PROP_CURSORSHAPE, VTERM_PROP_CURSORSHAPE_BLOCK); + break; + case 3: + settermprop_bool(state, VTERM_PROP_CURSORBLINK, 1); + settermprop_int (state, VTERM_PROP_CURSORSHAPE, VTERM_PROP_CURSORSHAPE_UNDERLINE); + break; + case 4: + settermprop_bool(state, VTERM_PROP_CURSORBLINK, 0); + settermprop_int (state, VTERM_PROP_CURSORSHAPE, VTERM_PROP_CURSORSHAPE_UNDERLINE); + break; + case 5: + settermprop_bool(state, VTERM_PROP_CURSORBLINK, 1); + settermprop_int (state, VTERM_PROP_CURSORSHAPE, VTERM_PROP_CURSORSHAPE_BAR_LEFT); + break; + case 6: + settermprop_bool(state, VTERM_PROP_CURSORBLINK, 0); + settermprop_int (state, VTERM_PROP_CURSORSHAPE, VTERM_PROP_CURSORSHAPE_BAR_LEFT); + break; + } + + break; + + case INTERMED('"', 0x71): /* DECSCA - DEC select character protection attribute */ + val = CSI_ARG_OR(args[0], 0); + + switch(val) { + case 0: case 2: + state->protected_cell = 0; + break; + case 1: + state->protected_cell = 1; + break; + } + + break; + + case 0x72: /* DECSTBM - DEC custom */ + state->scrollregion_top = CSI_ARG_OR(args[0], 1) - 1; + state->scrollregion_bottom = argcount < 2 || CSI_ARG_IS_MISSING(args[1]) ? -1 : CSI_ARG(args[1]); + LBOUND(state->scrollregion_top, 0); + UBOUND(state->scrollregion_top, state->rows); + LBOUND(state->scrollregion_bottom, -1); + if(state->scrollregion_top == 0 && state->scrollregion_bottom == state->rows) + state->scrollregion_bottom = -1; + else + UBOUND(state->scrollregion_bottom, state->rows); + + if(SCROLLREGION_BOTTOM(state) <= state->scrollregion_top) { + /* Invalid */ + state->scrollregion_top = 0; + state->scrollregion_bottom = -1; + } + + break; + + case 0x73: /* DECSLRM - DEC custom */ + /* Always allow setting these margins, just they won't take effect without DECVSSM */ + state->scrollregion_left = CSI_ARG_OR(args[0], 1) - 1; + state->scrollregion_right = argcount < 2 || CSI_ARG_IS_MISSING(args[1]) ? -1 : CSI_ARG(args[1]); + LBOUND(state->scrollregion_left, 0); + UBOUND(state->scrollregion_left, state->cols); + LBOUND(state->scrollregion_right, -1); + if(state->scrollregion_left == 0 && state->scrollregion_right == state->cols) + state->scrollregion_right = -1; + else + UBOUND(state->scrollregion_right, state->cols); + + if(state->scrollregion_right > -1 && + state->scrollregion_right <= state->scrollregion_left) { + /* Invalid */ + state->scrollregion_left = 0; + state->scrollregion_right = -1; + } + + break; + + case INTERMED('\'', 0x7D): /* DECIC */ + count = CSI_ARG_COUNT(args[0]); + + if(!is_cursor_in_scrollregion(state)) + break; + + rect.start_row = state->scrollregion_top; + rect.end_row = SCROLLREGION_BOTTOM(state); + rect.start_col = state->pos.col; + rect.end_col = SCROLLREGION_RIGHT(state); + + scroll(state, rect, 0, -count); + + break; + + case INTERMED('\'', 0x7E): /* DECDC */ + count = CSI_ARG_COUNT(args[0]); + + if(!is_cursor_in_scrollregion(state)) + break; + + rect.start_row = state->scrollregion_top; + rect.end_row = SCROLLREGION_BOTTOM(state); + rect.start_col = state->pos.col; + rect.end_col = SCROLLREGION_RIGHT(state); + + scroll(state, rect, 0, count); + + break; + + default: + if(state->fallbacks && state->fallbacks->csi) + if((*state->fallbacks->csi)(leader, args, argcount, intermed, command, state->fbdata)) + return 1; + + return 0; + } + + if(state->mode.origin) { + LBOUND(state->pos.row, state->scrollregion_top); + UBOUND(state->pos.row, SCROLLREGION_BOTTOM(state)-1); + LBOUND(state->pos.col, SCROLLREGION_LEFT(state)); + UBOUND(state->pos.col, SCROLLREGION_RIGHT(state)-1); + } + else { + LBOUND(state->pos.row, 0); + UBOUND(state->pos.row, state->rows-1); + LBOUND(state->pos.col, 0); + UBOUND(state->pos.col, THISROWWIDTH(state)-1); + } + + updatecursor(state, &oldpos, 1); + +#ifdef DEBUG + if(state->pos.row < 0 || state->pos.row >= state->rows || + state->pos.col < 0 || state->pos.col >= state->cols) { + fprintf(stderr, "Position out of bounds after CSI %c: (%d,%d)\n", + command, state->pos.row, state->pos.col); + abort(); + } + + if(SCROLLREGION_BOTTOM(state) <= state->scrollregion_top) { + fprintf(stderr, "Scroll region height out of bounds after CSI %c: %d <= %d\n", + command, SCROLLREGION_BOTTOM(state), state->scrollregion_top); + abort(); + } + + if(SCROLLREGION_RIGHT(state) <= SCROLLREGION_LEFT(state)) { + fprintf(stderr, "Scroll region width out of bounds after CSI %c: %d <= %d\n", + command, SCROLLREGION_RIGHT(state), SCROLLREGION_LEFT(state)); + abort(); + } +#endif + + return 1; +} + +static int on_osc(const char *command, size_t cmdlen, void *user) +{ + VTermState *state = user; + + if(cmdlen < 2) + return 0; + + if(strneq(command, "0;", 2)) { + settermprop_string(state, VTERM_PROP_ICONNAME, command + 2, cmdlen - 2); + settermprop_string(state, VTERM_PROP_TITLE, command + 2, cmdlen - 2); + return 1; + } + else if(strneq(command, "1;", 2)) { + settermprop_string(state, VTERM_PROP_ICONNAME, command + 2, cmdlen - 2); + return 1; + } + else if(strneq(command, "2;", 2)) { + settermprop_string(state, VTERM_PROP_TITLE, command + 2, cmdlen - 2); + return 1; + } + else if(state->fallbacks && state->fallbacks->osc) + if((*state->fallbacks->osc)(command, cmdlen, state->fbdata)) + return 1; + + return 0; +} + +static void request_status_string(VTermState *state, const char *command, size_t cmdlen) +{ + if(cmdlen == 1) + switch(command[0]) { + case 'm': /* Query SGR */ + { + long args[20]; + int argc = vterm_state_getpen(state, args, sizeof(args)/sizeof(args[0])); + int argi; + vterm_push_output_sprintf_ctrl(state->vt, C1_DCS, "1$r"); + for(argi = 0; argi < argc; argi++) + vterm_push_output_sprintf(state->vt, + argi == argc - 1 ? "%d" : + CSI_ARG_HAS_MORE(args[argi]) ? "%d:" : + "%d;", + CSI_ARG(args[argi])); + vterm_push_output_sprintf(state->vt, "m"); + vterm_push_output_sprintf_ctrl(state->vt, C1_ST, ""); + } + return; + case 'r': /* Query DECSTBM */ + vterm_push_output_sprintf_dcs(state->vt, "1$r%d;%dr", state->scrollregion_top+1, SCROLLREGION_BOTTOM(state)); + return; + case 's': /* Query DECSLRM */ + vterm_push_output_sprintf_dcs(state->vt, "1$r%d;%ds", SCROLLREGION_LEFT(state)+1, SCROLLREGION_RIGHT(state)); + return; + } + + if(cmdlen == 2) { + if(strneq(command, " q", 2)) { + int reply; + switch(state->mode.cursor_shape) { + case VTERM_PROP_CURSORSHAPE_BLOCK: reply = 2; break; + case VTERM_PROP_CURSORSHAPE_UNDERLINE: reply = 4; break; + case VTERM_PROP_CURSORSHAPE_BAR_LEFT: reply = 6; break; + } + if(state->mode.cursor_blink) + reply--; + vterm_push_output_sprintf_dcs(state->vt, "1$r%d q", reply); + return; + } + else if(strneq(command, "\"q", 2)) { + vterm_push_output_sprintf_dcs(state->vt, "1$r%d\"q", state->protected_cell ? 1 : 2); + return; + } + } + + vterm_push_output_sprintf_dcs(state->vt, "0$r%.s", (int)cmdlen, command); +} + +static int on_dcs(const char *command, size_t cmdlen, void *user) +{ + VTermState *state = user; + + if(cmdlen >= 2 && strneq(command, "$q", 2)) { + request_status_string(state, command+2, cmdlen-2); + return 1; + } + else if(state->fallbacks && state->fallbacks->dcs) + if((*state->fallbacks->dcs)(command, cmdlen, state->fbdata)) + return 1; + + return 0; +} + +static int on_resize(int rows, int cols, void *user) +{ + VTermState *state = user; + VTermPos oldpos = state->pos; + VTermPos delta = { 0, 0 }; + + if(cols != state->cols) { + unsigned char *newtabstops = vterm_allocator_malloc(state->vt, (cols + 7) / 8); + + /* TODO: This can all be done much more efficiently bytewise */ + int col; + for(col = 0; col < state->cols && col < cols; col++) { + unsigned char mask = 1 << (col & 7); + if(state->tabstops[col >> 3] & mask) + newtabstops[col >> 3] |= mask; + else + newtabstops[col >> 3] &= ~mask; + } + + for( ; col < cols; col++) { + unsigned char mask = 1 << (col & 7); + if(col % 8 == 0) + newtabstops[col >> 3] |= mask; + else + newtabstops[col >> 3] &= ~mask; + } + + vterm_allocator_free(state->vt, state->tabstops); + state->tabstops = newtabstops; + } + + if(rows != state->rows) { + VTermLineInfo *newlineinfo = vterm_allocator_malloc(state->vt, rows * sizeof(VTermLineInfo)); + + int row; + for(row = 0; row < state->rows && row < rows; row++) { + newlineinfo[row] = state->lineinfo[row]; + } + + for( ; row < rows; row++) { + newlineinfo[row].doublewidth = 0; + newlineinfo[row].doubleheight = 0; + } + + vterm_allocator_free(state->vt, state->lineinfo); + state->lineinfo = newlineinfo; + } + + state->rows = rows; + state->cols = cols; + + if(state->scrollregion_bottom > -1) + UBOUND(state->scrollregion_bottom, state->rows); + if(state->scrollregion_right > -1) + UBOUND(state->scrollregion_right, state->cols); + + if(state->callbacks && state->callbacks->resize) + (*state->callbacks->resize)(rows, cols, &delta, state->cbdata); + + if(state->at_phantom && state->pos.col < cols-1) { + state->at_phantom = 0; + state->pos.col++; + } + + state->pos.row += delta.row; + state->pos.col += delta.col; + + if(state->pos.row >= rows) + state->pos.row = rows - 1; + if(state->pos.col >= cols) + state->pos.col = cols - 1; + + updatecursor(state, &oldpos, 1); + + return 1; +} + +static const VTermParserCallbacks parser_callbacks = { + on_text, /* text */ + on_control, /* control */ + on_escape, /* escape */ + on_csi, /* csi */ + on_osc, /* osc */ + on_dcs, /* dcs */ + on_resize /* resize */ +}; + +VTermState *vterm_obtain_state(VTerm *vt) +{ + VTermState *state; + if(vt->state) + return vt->state; + + state = vterm_state_new(vt); + vt->state = state; + + state->combine_chars_size = 16; + state->combine_chars = vterm_allocator_malloc(state->vt, state->combine_chars_size * sizeof(state->combine_chars[0])); + + state->tabstops = vterm_allocator_malloc(state->vt, (state->cols + 7) / 8); + + state->lineinfo = vterm_allocator_malloc(state->vt, state->rows * sizeof(VTermLineInfo)); + + state->encoding_utf8.enc = vterm_lookup_encoding(ENC_UTF8, 'u'); + if(*state->encoding_utf8.enc->init) + (*state->encoding_utf8.enc->init)(state->encoding_utf8.enc, state->encoding_utf8.data); + + vterm_parser_set_callbacks(vt, &parser_callbacks, state); + + return state; +} + +void vterm_state_reset(VTermState *state, int hard) +{ + VTermEncoding *default_enc; + + state->scrollregion_top = 0; + state->scrollregion_bottom = -1; + state->scrollregion_left = 0; + state->scrollregion_right = -1; + + state->mode.keypad = 0; + state->mode.cursor = 0; + state->mode.autowrap = 1; + state->mode.insert = 0; + state->mode.newline = 0; + state->mode.alt_screen = 0; + state->mode.origin = 0; + state->mode.leftrightmargin = 0; + state->mode.bracketpaste = 0; + + state->vt->mode.ctrl8bit = 0; + + { + int col; + for(col = 0; col < state->cols; col++) + if(col % 8 == 0) + set_col_tabstop(state, col); + else + clear_col_tabstop(state, col); + } + + { + int row; + for(row = 0; row < state->rows; row++) + set_lineinfo(state, row, FORCE, DWL_OFF, DHL_OFF); + } + + if(state->callbacks && state->callbacks->initpen) + (*state->callbacks->initpen)(state->cbdata); + + vterm_state_resetpen(state); + + default_enc = state->vt->mode.utf8 ? + vterm_lookup_encoding(ENC_UTF8, 'u') : + vterm_lookup_encoding(ENC_SINGLE_94, 'B'); + + { + int i; + for(i = 0; i < 4; i++) { + state->encoding[i].enc = default_enc; + if(default_enc->init) + (*default_enc->init)(default_enc, state->encoding[i].data); + } + } + + state->gl_set = 0; + state->gr_set = 1; + state->gsingle_set = 0; + + state->protected_cell = 0; + + /* Initialise the props */ + settermprop_bool(state, VTERM_PROP_CURSORVISIBLE, 1); + settermprop_bool(state, VTERM_PROP_CURSORBLINK, 1); + settermprop_int (state, VTERM_PROP_CURSORSHAPE, VTERM_PROP_CURSORSHAPE_BLOCK); + + if(hard) { + VTermRect rect = { 0, 0, 0, 0 }; + + state->pos.row = 0; + state->pos.col = 0; + state->at_phantom = 0; + + rect.end_row = state->rows; + rect.end_col = state->cols; + erase(state, rect, 0); + } +} + +void vterm_state_get_cursorpos(const VTermState *state, VTermPos *cursorpos) +{ + *cursorpos = state->pos; +} + +void vterm_state_set_callbacks(VTermState *state, const VTermStateCallbacks *callbacks, void *user) +{ + if(callbacks) { + state->callbacks = callbacks; + state->cbdata = user; + + if(state->callbacks && state->callbacks->initpen) + (*state->callbacks->initpen)(state->cbdata); + } + else { + state->callbacks = NULL; + state->cbdata = NULL; + } +} + +void *vterm_state_get_cbdata(VTermState *state) +{ + return state->cbdata; +} + +void vterm_state_set_unrecognised_fallbacks(VTermState *state, const VTermParserCallbacks *fallbacks, void *user) +{ + if(fallbacks) { + state->fallbacks = fallbacks; + state->fbdata = user; + } + else { + state->fallbacks = NULL; + state->fbdata = NULL; + } +} + +void *vterm_state_get_unrecognised_fbdata(VTermState *state) +{ + return state->fbdata; +} + +int vterm_state_set_termprop(VTermState *state, VTermProp prop, VTermValue *val) +{ + /* Only store the new value of the property if usercode said it was happy. + * This is especially important for altscreen switching */ + if(state->callbacks && state->callbacks->settermprop) + if(!(*state->callbacks->settermprop)(prop, val, state->cbdata)) + return 0; + + switch(prop) { + case VTERM_PROP_TITLE: + case VTERM_PROP_ICONNAME: + /* we don't store these, just transparently pass through */ + return 1; + case VTERM_PROP_CURSORVISIBLE: + state->mode.cursor_visible = val->boolean; + return 1; + case VTERM_PROP_CURSORBLINK: + state->mode.cursor_blink = val->boolean; + return 1; + case VTERM_PROP_CURSORSHAPE: + state->mode.cursor_shape = val->number; + return 1; + case VTERM_PROP_REVERSE: + state->mode.screen = val->boolean; + return 1; + case VTERM_PROP_ALTSCREEN: + state->mode.alt_screen = val->boolean; + if(state->mode.alt_screen) { + VTermRect rect = {0, 0, 0, 0}; + rect.end_row = state->rows; + rect.end_col = state->cols; + erase(state, rect, 0); + } + return 1; + case VTERM_PROP_MOUSE: + state->mouse_flags = 0; + if(val->number) + state->mouse_flags |= MOUSE_WANT_CLICK; + if(val->number == VTERM_PROP_MOUSE_DRAG) + state->mouse_flags |= MOUSE_WANT_DRAG; + if(val->number == VTERM_PROP_MOUSE_MOVE) + state->mouse_flags |= MOUSE_WANT_MOVE; + return 1; + } + + return 0; +} + +const VTermLineInfo *vterm_state_get_lineinfo(const VTermState *state, int row) +{ + return state->lineinfo + row; +} |