helos1/extlib/libvterm/screen.c
2021-10-10 14:39:17 +08:00

878 lines
24 KiB
C

#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 inline 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);
for (int row = 0; row < new_rows; row++) {
for (int 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_LOG("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 = {
.start_row = 0,
.end_row = screen->rows,
.start_col = 0,
.end_col = screen->cols,
};
damagerect(screen, rect);
}
static int putglyph(VTermGlyphInfo *info, VTermPos pos, void *user) {
VTermScreen *screen = user;
ScreenCell * cell = getcell(screen, pos.row, pos.col);
if (!cell)
return 0;
int i;
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 (int col = 1; col < info->width; col++)
getcell(screen, pos.row, pos.col + col)->chars[0] = (uint32_t)-1;
VTermRect rect = {
.start_row = pos.row,
.end_row = pos.row + 1,
.start_col = pos.col,
.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;
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 (int 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;
for (int row = rect.start_row; row < screen->state->rows && row < rect.end_row; row++) {
const VTermLineInfo *info = vterm_state_get_lineinfo(screen->state, row);
for (int 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, 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_LOG("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;
case VTERM_N_ATTRS:
return 0;
}
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;
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;
int first_blank_row = pos.row + 1;
if (first_blank_row > new_rows) {
VTermRect rect = {
.start_row = 0,
.end_row = old_rows,
.start_col = 0,
.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 = {
.start_row = 0,
.end_row = old_rows,
.start_col = old_cols,
.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) {
if (!(screen->callbacks->sb_popline(screen->cols, screen->sb_buffer, screen->cbdata)))
break;
VTermRect rect = {
.start_row = 0,
.end_row = screen->rows,
.start_col = 0,
.end_col = screen->cols,
};
scrollrect(rect, -1, 0, user);
VTermPos pos = {0, 0};
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 = {
.start_row = old_rows,
.end_row = new_rows,
.start_col = 0,
.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;
if (newinfo->doublewidth != oldinfo->doublewidth ||
newinfo->doubleheight != oldinfo->doubleheight) {
for (int col = 0; col < screen->cols; col++) {
ScreenCell *cell = getcell(screen, row, col);
cell->pen.dwl = newinfo->doublewidth;
cell->pen.dhl = newinfo->doubleheight;
}
VTermRect rect = {
.start_row = row,
.end_row = row + 1,
.start_col = 0,
.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,
.erase = &erase,
.setpenattr = &setpenattr,
.settermprop = &settermprop,
.bell = &bell,
.resize = &resize,
.setlineinfo = &setlineinfo,
};
static VTermScreen *screen_new(VTerm *vt) {
VTermState *state = vterm_obtain_state(vt);
if (!state)
return NULL;
VTermScreen *screen = vterm_allocator_malloc(vt, sizeof(VTermScreen));
int rows, cols;
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;
#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 (int row = rect.start_row; row < rect.end_row; row++) {
for (int col = rect.start_col; col < rect.end_col; col++) {
ScreenCell *cell = getcell(screen, row, col);
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 (int 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);
if (!intcell)
return 0;
for (int i = 0; i < VTERM_MAX_CHARS_PER_CELL; 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);
if (!intcell)
return 0;
for (int i = 0; i < VTERM_MAX_CHARS_PER_CELL; 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) {
if (vt->screen)
return vt->screen;
VTermScreen *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_is_equal(&a->pen.fg, &b->pen.fg))
return 1;
if ((attrs & VTERM_ATTR_BACKGROUND_MASK) && !vterm_color_is_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) {
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;
int col;
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;
}
void vterm_screen_convert_color_to_rgb(const VTermScreen *screen, VTermColor *col) {
vterm_state_convert_color_to_rgb(screen->state, col);
}