diff options
Diffstat (limited to 'src/libvterm/src/screen.c')
| -rw-r--r-- | src/libvterm/src/screen.c | 937 |
1 files changed, 937 insertions, 0 deletions
diff --git a/src/libvterm/src/screen.c b/src/libvterm/src/screen.c new file mode 100644 index 000000000..ef13f3dcc --- /dev/null +++ b/src/libvterm/src/screen.c @@ -0,0 +1,937 @@ +#include "vterm_internal.h" + +#include <stdio.h> +#include <string.h> + +#include "rect.h" +#include "utf8.h" + +#define UNICODE_SPACE 0x20 +#define UNICODE_LINEFEED 0x0a + +/* State of the pen at some moment in time, also used in a cell */ +typedef struct +{ + /* After the bitfield */ + VTermColor fg, bg; + + unsigned int bold : 1; + unsigned int underline : 2; + unsigned int italic : 1; + unsigned int blink : 1; + unsigned int reverse : 1; + unsigned int strike : 1; + unsigned int font : 4; /* 0 to 9 */ + + /* Extra state storage that isn't strictly pen-related */ + unsigned int protected_cell : 1; + unsigned int dwl : 1; /* on a DECDWL or DECDHL line */ + unsigned int dhl : 2; /* on a DECDHL line (1=top 2=bottom) */ +} ScreenPen; + +/* Internal representation of a screen cell */ +typedef struct +{ + uint32_t chars[VTERM_MAX_CHARS_PER_CELL]; + ScreenPen pen; +} ScreenCell; + +static int vterm_screen_set_cell(VTermScreen *screen, VTermPos pos, const VTermScreenCell *cell); + +struct VTermScreen +{ + VTerm *vt; + VTermState *state; + + const VTermScreenCallbacks *callbacks; + void *cbdata; + + VTermDamageSize damage_merge; + /* start_row == -1 => no damage */ + VTermRect damaged; + VTermRect pending_scrollrect; + int pending_scroll_downward, pending_scroll_rightward; + + int rows; + int cols; + int global_reverse; + + /* Primary and Altscreen. buffers[1] is lazily allocated as needed */ + ScreenCell *buffers[2]; + + /* buffer will == buffers[0] or buffers[1], depending on altscreen */ + ScreenCell *buffer; + + /* buffer for a single screen row used in scrollback storage callbacks */ + VTermScreenCell *sb_buffer; + + ScreenPen pen; +}; + +static ScreenCell *getcell(const VTermScreen *screen, int row, int col) +{ + if(row < 0 || row >= screen->rows) + return NULL; + if(col < 0 || col >= screen->cols) + return NULL; + return screen->buffer + (screen->cols * row) + col; +} + +static ScreenCell *realloc_buffer(VTermScreen *screen, ScreenCell *buffer, int new_rows, int new_cols) +{ + ScreenCell *new_buffer = vterm_allocator_malloc(screen->vt, sizeof(ScreenCell) * new_rows * new_cols); + int row, col; + + for(row = 0; row < new_rows; row++) { + for(col = 0; col < new_cols; col++) { + ScreenCell *new_cell = new_buffer + row*new_cols + col; + + if(buffer && row < screen->rows && col < screen->cols) + *new_cell = buffer[row * screen->cols + col]; + else { + new_cell->chars[0] = 0; + new_cell->pen = screen->pen; + } + } + } + + if(buffer) + vterm_allocator_free(screen->vt, buffer); + + return new_buffer; +} + +static void damagerect(VTermScreen *screen, VTermRect rect) +{ + VTermRect emit; + + switch(screen->damage_merge) { + case VTERM_DAMAGE_CELL: + /* Always emit damage event */ + emit = rect; + break; + + case VTERM_DAMAGE_ROW: + /* Emit damage longer than one row. Try to merge with existing damage in + * the same row */ + if(rect.end_row > rect.start_row + 1) { + /* Bigger than 1 line - flush existing, emit this */ + vterm_screen_flush_damage(screen); + emit = rect; + } + else if(screen->damaged.start_row == -1) { + /* None stored yet */ + screen->damaged = rect; + return; + } + else if(rect.start_row == screen->damaged.start_row) { + /* Merge with the stored line */ + if(screen->damaged.start_col > rect.start_col) + screen->damaged.start_col = rect.start_col; + if(screen->damaged.end_col < rect.end_col) + screen->damaged.end_col = rect.end_col; + return; + } + else { + /* Emit the currently stored line, store a new one */ + emit = screen->damaged; + screen->damaged = rect; + } + break; + + case VTERM_DAMAGE_SCREEN: + case VTERM_DAMAGE_SCROLL: + /* Never emit damage event */ + if(screen->damaged.start_row == -1) + screen->damaged = rect; + else { + rect_expand(&screen->damaged, &rect); + } + return; + + default: + DEBUG_LOG1("TODO: Maybe merge damage for level %d\n", screen->damage_merge); + return; + } + + if(screen->callbacks && screen->callbacks->damage) + (*screen->callbacks->damage)(emit, screen->cbdata); +} + +static void damagescreen(VTermScreen *screen) +{ + VTermRect rect = {0,0,0,0}; + rect.end_row = screen->rows; + rect.end_col = screen->cols; + + damagerect(screen, rect); +} + +static int putglyph(VTermGlyphInfo *info, VTermPos pos, void *user) +{ + int i; + int col; + VTermRect rect; + + VTermScreen *screen = user; + ScreenCell *cell = getcell(screen, pos.row, pos.col); + + if(!cell) + return 0; + + for(i = 0; i < VTERM_MAX_CHARS_PER_CELL && info->chars[i]; i++) { + cell->chars[i] = info->chars[i]; + cell->pen = screen->pen; + } + if(i < VTERM_MAX_CHARS_PER_CELL) + cell->chars[i] = 0; + + for(col = 1; col < info->width; col++) + getcell(screen, pos.row, pos.col + col)->chars[0] = (uint32_t)-1; + + rect.start_row = pos.row; + rect.end_row = pos.row+1; + rect.start_col = pos.col; + rect.end_col = pos.col+info->width; + + cell->pen.protected_cell = info->protected_cell; + cell->pen.dwl = info->dwl; + cell->pen.dhl = info->dhl; + + damagerect(screen, rect); + + return 1; +} + +static int moverect_internal(VTermRect dest, VTermRect src, void *user) +{ + VTermScreen *screen = user; + + if(screen->callbacks && screen->callbacks->sb_pushline && + dest.start_row == 0 && dest.start_col == 0 && /* starts top-left corner */ + dest.end_col == screen->cols && /* full width */ + screen->buffer == screen->buffers[0]) { /* not altscreen */ + VTermPos pos; + for(pos.row = 0; pos.row < src.start_row; pos.row++) { + for(pos.col = 0; pos.col < screen->cols; pos.col++) + vterm_screen_get_cell(screen, pos, screen->sb_buffer + pos.col); + + (screen->callbacks->sb_pushline)(screen->cols, screen->sb_buffer, screen->cbdata); + } + } + + { + int cols = src.end_col - src.start_col; + int downward = src.start_row - dest.start_row; + int init_row, test_row, inc_row; + int row; + + if(downward < 0) { + init_row = dest.end_row - 1; + test_row = dest.start_row - 1; + inc_row = -1; + } + else { + init_row = dest.start_row; + test_row = dest.end_row; + inc_row = +1; + } + + for(row = init_row; row != test_row; row += inc_row) + memmove(getcell(screen, row, dest.start_col), + getcell(screen, row + downward, src.start_col), + cols * sizeof(ScreenCell)); + } + + return 1; +} + +static int moverect_user(VTermRect dest, VTermRect src, void *user) +{ + VTermScreen *screen = user; + + if(screen->callbacks && screen->callbacks->moverect) { + if(screen->damage_merge != VTERM_DAMAGE_SCROLL) + /* Avoid an infinite loop */ + vterm_screen_flush_damage(screen); + + if((*screen->callbacks->moverect)(dest, src, screen->cbdata)) + return 1; + } + + damagerect(screen, dest); + + return 1; +} + +static int erase_internal(VTermRect rect, int selective, void *user) +{ + VTermScreen *screen = user; + int row, col; + + for(row = rect.start_row; row < screen->state->rows && row < rect.end_row; row++) { + const VTermLineInfo *info = vterm_state_get_lineinfo(screen->state, row); + + for(col = rect.start_col; col < rect.end_col; col++) { + ScreenCell *cell = getcell(screen, row, col); + + if(selective && cell->pen.protected_cell) + continue; + + cell->chars[0] = 0; + cell->pen = screen->pen; + cell->pen.dwl = info->doublewidth; + cell->pen.dhl = info->doubleheight; + } + } + + return 1; +} + +static int erase_user(VTermRect rect, int selective UNUSED, void *user) +{ + VTermScreen *screen = user; + + damagerect(screen, rect); + + return 1; +} + +static int erase(VTermRect rect, int selective, void *user) +{ + erase_internal(rect, selective, user); + return erase_user(rect, 0, user); +} + +static int scrollrect(VTermRect rect, int downward, int rightward, void *user) +{ + VTermScreen *screen = user; + + if(screen->damage_merge != VTERM_DAMAGE_SCROLL) { + vterm_scroll_rect(rect, downward, rightward, + moverect_internal, erase_internal, screen); + + vterm_screen_flush_damage(screen); + + vterm_scroll_rect(rect, downward, rightward, + moverect_user, erase_user, screen); + + return 1; + } + + if(screen->damaged.start_row != -1 && + !rect_intersects(&rect, &screen->damaged)) { + vterm_screen_flush_damage(screen); + } + + if(screen->pending_scrollrect.start_row == -1) { + screen->pending_scrollrect = rect; + screen->pending_scroll_downward = downward; + screen->pending_scroll_rightward = rightward; + } + else if(rect_equal(&screen->pending_scrollrect, &rect) && + ((screen->pending_scroll_downward == 0 && downward == 0) || + (screen->pending_scroll_rightward == 0 && rightward == 0))) { + screen->pending_scroll_downward += downward; + screen->pending_scroll_rightward += rightward; + } + else { + vterm_screen_flush_damage(screen); + + screen->pending_scrollrect = rect; + screen->pending_scroll_downward = downward; + screen->pending_scroll_rightward = rightward; + } + + vterm_scroll_rect(rect, downward, rightward, + moverect_internal, erase_internal, screen); + + if(screen->damaged.start_row == -1) + return 1; + + if(rect_contains(&rect, &screen->damaged)) { + /* Scroll region entirely contains the damage; just move it */ + vterm_rect_move(&screen->damaged, -downward, -rightward); + rect_clip(&screen->damaged, &rect); + } + /* There are a number of possible cases here, but lets restrict this to only + * the common case where we might actually gain some performance by + * optimising it. Namely, a vertical scroll that neatly cuts the damage + * region in half. + */ + else if(rect.start_col <= screen->damaged.start_col && + rect.end_col >= screen->damaged.end_col && + rightward == 0) { + if(screen->damaged.start_row >= rect.start_row && + screen->damaged.start_row < rect.end_row) { + screen->damaged.start_row -= downward; + if(screen->damaged.start_row < rect.start_row) + screen->damaged.start_row = rect.start_row; + if(screen->damaged.start_row > rect.end_row) + screen->damaged.start_row = rect.end_row; + } + if(screen->damaged.end_row >= rect.start_row && + screen->damaged.end_row < rect.end_row) { + screen->damaged.end_row -= downward; + if(screen->damaged.end_row < rect.start_row) + screen->damaged.end_row = rect.start_row; + if(screen->damaged.end_row > rect.end_row) + screen->damaged.end_row = rect.end_row; + } + } + else { + DEBUG_LOG2("TODO: Just flush and redo damaged=" STRFrect " rect=" STRFrect "\n", + ARGSrect(screen->damaged), ARGSrect(rect)); + } + + return 1; +} + +static int movecursor(VTermPos pos, VTermPos oldpos, int visible, void *user) +{ + VTermScreen *screen = user; + + if(screen->callbacks && screen->callbacks->movecursor) + return (*screen->callbacks->movecursor)(pos, oldpos, visible, screen->cbdata); + + return 0; +} + +static int setpenattr(VTermAttr attr, VTermValue *val, void *user) +{ + VTermScreen *screen = user; + + switch(attr) { + case VTERM_ATTR_BOLD: + screen->pen.bold = val->boolean; + return 1; + case VTERM_ATTR_UNDERLINE: + screen->pen.underline = val->number; + return 1; + case VTERM_ATTR_ITALIC: + screen->pen.italic = val->boolean; + return 1; + case VTERM_ATTR_BLINK: + screen->pen.blink = val->boolean; + return 1; + case VTERM_ATTR_REVERSE: + screen->pen.reverse = val->boolean; + return 1; + case VTERM_ATTR_STRIKE: + screen->pen.strike = val->boolean; + return 1; + case VTERM_ATTR_FONT: + screen->pen.font = val->number; + return 1; + case VTERM_ATTR_FOREGROUND: + screen->pen.fg = val->color; + return 1; + case VTERM_ATTR_BACKGROUND: + screen->pen.bg = val->color; + return 1; + } + + return 0; +} + +static int settermprop(VTermProp prop, VTermValue *val, void *user) +{ + VTermScreen *screen = user; + + switch(prop) { + case VTERM_PROP_ALTSCREEN: + if(val->boolean && !screen->buffers[1]) + return 0; + + screen->buffer = val->boolean ? screen->buffers[1] : screen->buffers[0]; + /* only send a damage event on disable; because during enable there's an + * erase that sends a damage anyway + */ + if(!val->boolean) + damagescreen(screen); + break; + case VTERM_PROP_REVERSE: + screen->global_reverse = val->boolean; + damagescreen(screen); + break; + default: + ; /* ignore */ + } + + if(screen->callbacks && screen->callbacks->settermprop) + return (*screen->callbacks->settermprop)(prop, val, screen->cbdata); + + return 1; +} + +static int bell(void *user) +{ + VTermScreen *screen = user; + + if(screen->callbacks && screen->callbacks->bell) + return (*screen->callbacks->bell)(screen->cbdata); + + return 0; +} + +static int resize(int new_rows, int new_cols, VTermPos *delta, void *user) +{ + VTermScreen *screen = user; + + int is_altscreen = (screen->buffers[1] && screen->buffer == screen->buffers[1]); + + int old_rows = screen->rows; + int old_cols = screen->cols; + int first_blank_row; + + if(!is_altscreen && new_rows < old_rows) { + /* Fewer rows - determine if we're going to scroll at all, and if so, push + those lines to scrollback */ + VTermPos pos = { 0, 0 }; + VTermPos cursor = screen->state->pos; + /* Find the first blank row after the cursor. */ + for(pos.row = old_rows - 1; pos.row >= new_rows; pos.row--) + if(!vterm_screen_is_eol(screen, pos) || cursor.row == pos.row) + break; + + first_blank_row = pos.row + 1; + if(first_blank_row > new_rows) { + VTermRect rect = {0,0,0,0}; + rect.end_row = old_rows; + rect.end_col = old_cols; + scrollrect(rect, first_blank_row - new_rows, 0, user); + vterm_screen_flush_damage(screen); + + delta->row -= first_blank_row - new_rows; + } + } + + screen->buffers[0] = realloc_buffer(screen, screen->buffers[0], new_rows, new_cols); + if(screen->buffers[1]) + screen->buffers[1] = realloc_buffer(screen, screen->buffers[1], new_rows, new_cols); + + screen->buffer = is_altscreen ? screen->buffers[1] : screen->buffers[0]; + + screen->rows = new_rows; + screen->cols = new_cols; + + if(screen->sb_buffer) + vterm_allocator_free(screen->vt, screen->sb_buffer); + + screen->sb_buffer = vterm_allocator_malloc(screen->vt, sizeof(VTermScreenCell) * new_cols); + + if(new_cols > old_cols) { + VTermRect rect; + rect.start_row = 0; + rect.end_row = old_rows; + rect.start_col = old_cols; + rect.end_col = new_cols; + damagerect(screen, rect); + } + + if(new_rows > old_rows) { + if(!is_altscreen && screen->callbacks && screen->callbacks->sb_popline) { + int rows = new_rows - old_rows; + while(rows) { + VTermRect rect = {0,0,0,0}; + VTermPos pos = { 0, 0 }; + if(!(screen->callbacks->sb_popline(screen->cols, screen->sb_buffer, screen->cbdata))) + break; + + rect.end_row = screen->rows; + rect.end_col = screen->cols; + scrollrect(rect, -1, 0, user); + + for(pos.col = 0; pos.col < screen->cols; pos.col += screen->sb_buffer[pos.col].width) + vterm_screen_set_cell(screen, pos, screen->sb_buffer + pos.col); + + rect.end_row = 1; + damagerect(screen, rect); + + vterm_screen_flush_damage(screen); + + rows--; + delta->row++; + } + } + + { + VTermRect rect; + rect.start_row = old_rows; + rect.end_row = new_rows; + rect.start_col = 0; + rect.end_col = new_cols; + damagerect(screen, rect); + } + } + + if(screen->callbacks && screen->callbacks->resize) + return (*screen->callbacks->resize)(new_rows, new_cols, screen->cbdata); + + return 1; +} + +static int setlineinfo(int row, const VTermLineInfo *newinfo, const VTermLineInfo *oldinfo, void *user) +{ + VTermScreen *screen = user; + int col; + VTermRect rect; + + if(newinfo->doublewidth != oldinfo->doublewidth || + newinfo->doubleheight != oldinfo->doubleheight) { + for(col = 0; col < screen->cols; col++) { + ScreenCell *cell = getcell(screen, row, col); + cell->pen.dwl = newinfo->doublewidth; + cell->pen.dhl = newinfo->doubleheight; + } + + rect.start_row = row; + rect.end_row = row + 1; + rect.start_col = 0; + rect.end_col = newinfo->doublewidth ? screen->cols / 2 : screen->cols; + damagerect(screen, rect); + + if(newinfo->doublewidth) { + rect.start_col = screen->cols / 2; + rect.end_col = screen->cols; + + erase_internal(rect, 0, user); + } + } + + return 1; +} + +static VTermStateCallbacks state_cbs = { + &putglyph, /* putglyph */ + &movecursor, /* movecursor */ + &scrollrect, /* scrollrect */ + NULL, /* moverect */ + &erase, /* erase */ + NULL, /* initpen */ + &setpenattr, /* setpenattr */ + &settermprop, /* settermprop */ + &bell, /* bell */ + &resize, /* resize */ + &setlineinfo /* setlineinfo */ +}; + +static VTermScreen *screen_new(VTerm *vt) +{ + VTermState *state = vterm_obtain_state(vt); + VTermScreen *screen; + int rows, cols; + + if(!state) + return NULL; + + screen = vterm_allocator_malloc(vt, sizeof(VTermScreen)); + + vterm_get_size(vt, &rows, &cols); + + screen->vt = vt; + screen->state = state; + + screen->damage_merge = VTERM_DAMAGE_CELL; + screen->damaged.start_row = -1; + screen->pending_scrollrect.start_row = -1; + + screen->rows = rows; + screen->cols = cols; + + screen->callbacks = NULL; + screen->cbdata = NULL; + + screen->buffers[0] = realloc_buffer(screen, NULL, rows, cols); + + screen->buffer = screen->buffers[0]; + + screen->sb_buffer = vterm_allocator_malloc(screen->vt, sizeof(VTermScreenCell) * cols); + + vterm_state_set_callbacks(screen->state, &state_cbs, screen); + + return screen; +} + +INTERNAL void vterm_screen_free(VTermScreen *screen) +{ + vterm_allocator_free(screen->vt, screen->buffers[0]); + if(screen->buffers[1]) + vterm_allocator_free(screen->vt, screen->buffers[1]); + + vterm_allocator_free(screen->vt, screen->sb_buffer); + + vterm_allocator_free(screen->vt, screen); +} + +void vterm_screen_reset(VTermScreen *screen, int hard) +{ + screen->damaged.start_row = -1; + screen->pending_scrollrect.start_row = -1; + vterm_state_reset(screen->state, hard); + vterm_screen_flush_damage(screen); +} + +static size_t _get_chars(const VTermScreen *screen, const int utf8, void *buffer, size_t len, const VTermRect rect) +{ + size_t outpos = 0; + int padding = 0; + int row, col; + +#define PUT(c) \ + if(utf8) { \ + size_t thislen = utf8_seqlen(c); \ + if(buffer && outpos + thislen <= len) \ + outpos += fill_utf8((c), (char *)buffer + outpos); \ + else \ + outpos += thislen; \ + } \ + else { \ + if(buffer && outpos + 1 <= len) \ + ((uint32_t*)buffer)[outpos++] = (c); \ + else \ + outpos++; \ + } + + for(row = rect.start_row; row < rect.end_row; row++) { + for(col = rect.start_col; col < rect.end_col; col++) { + ScreenCell *cell = getcell(screen, row, col); + int i; + + if(cell->chars[0] == 0) + /* Erased cell, might need a space */ + padding++; + else if(cell->chars[0] == (uint32_t)-1) + /* Gap behind a double-width char, do nothing */ + ; + else { + while(padding) { + PUT(UNICODE_SPACE); + padding--; + } + for(i = 0; i < VTERM_MAX_CHARS_PER_CELL && cell->chars[i]; i++) { + PUT(cell->chars[i]); + } + } + } + + if(row < rect.end_row - 1) { + PUT(UNICODE_LINEFEED); + padding = 0; + } + } + + return outpos; +} + +size_t vterm_screen_get_chars(const VTermScreen *screen, uint32_t *chars, size_t len, const VTermRect rect) +{ + return _get_chars(screen, 0, chars, len, rect); +} + +size_t vterm_screen_get_text(const VTermScreen *screen, char *str, size_t len, const VTermRect rect) +{ + return _get_chars(screen, 1, str, len, rect); +} + +/* Copy internal to external representation of a screen cell */ +int vterm_screen_get_cell(const VTermScreen *screen, VTermPos pos, VTermScreenCell *cell) +{ + ScreenCell *intcell = getcell(screen, pos.row, pos.col); + int i; + + if(!intcell) + return 0; + + for(i = 0; ; i++) { + cell->chars[i] = intcell->chars[i]; + if(!intcell->chars[i]) + break; + } + + cell->attrs.bold = intcell->pen.bold; + cell->attrs.underline = intcell->pen.underline; + cell->attrs.italic = intcell->pen.italic; + cell->attrs.blink = intcell->pen.blink; + cell->attrs.reverse = intcell->pen.reverse ^ screen->global_reverse; + cell->attrs.strike = intcell->pen.strike; + cell->attrs.font = intcell->pen.font; + + cell->attrs.dwl = intcell->pen.dwl; + cell->attrs.dhl = intcell->pen.dhl; + + cell->fg = intcell->pen.fg; + cell->bg = intcell->pen.bg; + + if(pos.col < (screen->cols - 1) && + getcell(screen, pos.row, pos.col + 1)->chars[0] == (uint32_t)-1) + cell->width = 2; + else + cell->width = 1; + + return 1; +} + +/* Copy external to internal representation of a screen cell */ +/* static because it's only used internally for sb_popline during resize */ +static int vterm_screen_set_cell(VTermScreen *screen, VTermPos pos, const VTermScreenCell *cell) +{ + ScreenCell *intcell = getcell(screen, pos.row, pos.col); + int i; + + if(!intcell) + return 0; + + for(i = 0; ; i++) { + intcell->chars[i] = cell->chars[i]; + if(!cell->chars[i]) + break; + } + + intcell->pen.bold = cell->attrs.bold; + intcell->pen.underline = cell->attrs.underline; + intcell->pen.italic = cell->attrs.italic; + intcell->pen.blink = cell->attrs.blink; + intcell->pen.reverse = cell->attrs.reverse ^ screen->global_reverse; + intcell->pen.strike = cell->attrs.strike; + intcell->pen.font = cell->attrs.font; + + intcell->pen.fg = cell->fg; + intcell->pen.bg = cell->bg; + + if(cell->width == 2) + getcell(screen, pos.row, pos.col + 1)->chars[0] = (uint32_t)-1; + + return 1; +} + +int vterm_screen_is_eol(const VTermScreen *screen, VTermPos pos) +{ + /* This cell is EOL if this and every cell to the right is black */ + for(; pos.col < screen->cols; pos.col++) { + ScreenCell *cell = getcell(screen, pos.row, pos.col); + if(cell->chars[0] != 0) + return 0; + } + + return 1; +} + +VTermScreen *vterm_obtain_screen(VTerm *vt) +{ + VTermScreen *screen; + if(vt->screen) + return vt->screen; + + screen = screen_new(vt); + vt->screen = screen; + + return screen; +} + +void vterm_screen_enable_altscreen(VTermScreen *screen, int altscreen) +{ + + if(!screen->buffers[1] && altscreen) { + int rows, cols; + vterm_get_size(screen->vt, &rows, &cols); + + screen->buffers[1] = realloc_buffer(screen, NULL, rows, cols); + } +} + +void vterm_screen_set_callbacks(VTermScreen *screen, const VTermScreenCallbacks *callbacks, void *user) +{ + screen->callbacks = callbacks; + screen->cbdata = user; +} + +void *vterm_screen_get_cbdata(VTermScreen *screen) +{ + return screen->cbdata; +} + +void vterm_screen_set_unrecognised_fallbacks(VTermScreen *screen, const VTermParserCallbacks *fallbacks, void *user) +{ + vterm_state_set_unrecognised_fallbacks(screen->state, fallbacks, user); +} + +void *vterm_screen_get_unrecognised_fbdata(VTermScreen *screen) +{ + return vterm_state_get_unrecognised_fbdata(screen->state); +} + +void vterm_screen_flush_damage(VTermScreen *screen) +{ + if(screen->pending_scrollrect.start_row != -1) { + vterm_scroll_rect(screen->pending_scrollrect, screen->pending_scroll_downward, screen->pending_scroll_rightward, + moverect_user, erase_user, screen); + + screen->pending_scrollrect.start_row = -1; + } + + if(screen->damaged.start_row != -1) { + if(screen->callbacks && screen->callbacks->damage) + (*screen->callbacks->damage)(screen->damaged, screen->cbdata); + + screen->damaged.start_row = -1; + } +} + +void vterm_screen_set_damage_merge(VTermScreen *screen, VTermDamageSize size) +{ + vterm_screen_flush_damage(screen); + screen->damage_merge = size; +} + +static int attrs_differ(VTermAttrMask attrs, ScreenCell *a, ScreenCell *b) +{ + if((attrs & VTERM_ATTR_BOLD_MASK) && (a->pen.bold != b->pen.bold)) + return 1; + if((attrs & VTERM_ATTR_UNDERLINE_MASK) && (a->pen.underline != b->pen.underline)) + return 1; + if((attrs & VTERM_ATTR_ITALIC_MASK) && (a->pen.italic != b->pen.italic)) + return 1; + if((attrs & VTERM_ATTR_BLINK_MASK) && (a->pen.blink != b->pen.blink)) + return 1; + if((attrs & VTERM_ATTR_REVERSE_MASK) && (a->pen.reverse != b->pen.reverse)) + return 1; + if((attrs & VTERM_ATTR_STRIKE_MASK) && (a->pen.strike != b->pen.strike)) + return 1; + if((attrs & VTERM_ATTR_FONT_MASK) && (a->pen.font != b->pen.font)) + return 1; + if((attrs & VTERM_ATTR_FOREGROUND_MASK) && !vterm_color_equal(a->pen.fg, b->pen.fg)) + return 1; + if((attrs & VTERM_ATTR_BACKGROUND_MASK) && !vterm_color_equal(a->pen.bg, b->pen.bg)) + return 1; + + return 0; +} + +int vterm_screen_get_attrs_extent(const VTermScreen *screen, VTermRect *extent, VTermPos pos, VTermAttrMask attrs) +{ + int col; + + ScreenCell *target = getcell(screen, pos.row, pos.col); + + /* TODO: bounds check */ + extent->start_row = pos.row; + extent->end_row = pos.row + 1; + + if(extent->start_col < 0) + extent->start_col = 0; + if(extent->end_col < 0) + extent->end_col = screen->cols; + + for(col = pos.col - 1; col >= extent->start_col; col--) + if(attrs_differ(attrs, target, getcell(screen, pos.row, col))) + break; + extent->start_col = col + 1; + + for(col = pos.col + 1; col < extent->end_col; col++) + if(attrs_differ(attrs, target, getcell(screen, pos.row, col))) + break; + extent->end_col = col - 1; + + return 1; +} |