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Function to guess the effective color at the edge of the current screen line

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This commit is contained in:
Kovid Goyal 2022-12-04 14:04:43 +05:30
parent fe53555dba
commit cf8f904720
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2 changed files with 46 additions and 0 deletions
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3
kitty/fast_data_types.pyi
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@ -1170,6 +1170,9 @@ class Screen:
def insert_characters(self, num: int) -> None:
pass
def line_edge_colors(self) -> Tuple[int, int]:
pass
def set_tab_bar_render_data(
os_window_id: int, screen: Screen, left: int, top: int, right: int, bottom: int

43
kitty/screen.c
View File

@ -3948,10 +3948,53 @@ cursor_at_prompt(Screen *self, PyObject *args UNUSED) {
Py_RETURN_FALSE;
}
static color_type
effective_cell_edge_color(char_type ch, color_type fg, color_type bg, bool is_left_edge) {
START_ALLOW_CASE_RANGE
if (ch == 0x2588) return fg; // full block
if (is_left_edge) {
switch (ch) {
case 0x2589 ... 0x258f: // left eighth blocks
case 0xe0b0: case 0xe0b4: case 0xe0b8: case 0xe0bc: // powerline blocks
case 0x1fb6a: // 🭪
return fg;
}
} else {
switch (ch) {
case 0x2590: // right half block
case 0x1fb87 ... 0x1fb8b: // eighth right blocks
case 0xe0b2: case 0xe0b6: case 0xe0ba: case 0xe0be:
case 0x1fb68: // 🭨
return fg;
}
}
return bg;
END_ALLOW_CASE_RANGE
}
static PyObject*
line_edge_colors(Screen *self, PyObject *a UNUSED) {
// Return the color at the left and right edges of the line with the cursor on it
Line *line = range_line_(self, self->cursor->y);
if (!line) { PyErr_SetString(PyExc_IndexError, "Line number out of range"); return NULL; }
color_type left_cell_fg = 0, left_cell_bg = 0, right_cell_bg = 0, right_cell_fg = 0;
index_type cell_color_x = 0;
char_type left_char = line_get_char(line, cell_color_x);
colors_for_cell(line, self->color_profile, &cell_color_x, &left_cell_fg, &left_cell_bg);
if (line->xnum > 0) cell_color_x = line->xnum - 1;
char_type right_char = line_get_char(line, cell_color_x);
colors_for_cell(line, self->color_profile, &cell_color_x, &right_cell_fg, &right_cell_bg);
unsigned long left = effective_cell_edge_color(left_char, left_cell_fg, left_cell_bg, true);
unsigned long right = effective_cell_edge_color(right_char, right_cell_fg, right_cell_bg, false);
return Py_BuildValue("kk", left, right);
}
#define MND(name, args) {#name, (PyCFunction)name, args, #name},
#define MODEFUNC(name) MND(name, METH_NOARGS) MND(set_##name, METH_O)
static PyMethodDef methods[] = {
MND(line_edge_colors, METH_NOARGS)
MND(line, METH_O)
MND(dump_lines_with_attrs, METH_O)
MND(cursor_at_prompt, METH_NOARGS)