diff -up vim81/src/libvterm/src/termscreen.c.missing-file vim81/src/libvterm/src/termscreen.c
--- vim81/src/libvterm/src/termscreen.c.missing-file 2018-09-19 09:26:00.601523830 +0200
+++ vim81/src/libvterm/src/termscreen.c 2018-09-19 09:26:56.448031158 +0200
@@ -0,0 +1,935 @@
+#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++)
+ (void)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;
+
+ 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;
+ 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)
+{
+ if(!vt->screen)
+ vt->screen = screen_new(vt);
+ return vt->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;
+}