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term: implement cursor blinking

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Blinking can be enabled either by setting the cursor style with

 CSI Ps SP q

and selecting a blinking style.

Or, with 'CSI ? 12 h'

Note that both affect the same internal state. I.e. you can disable
blinking with CSI ? 12l after having selected a blinking cursor
style. This is consistent with XTerm behavior.
This commit is contained in:
Daniel Eklöf 2019-12-15 15:07:56 +01:00
parent 5106937c7b
commit 7d29435d86
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GPG key ID: 5BBD4992C116573F
4 changed files with 93 additions and 9 deletions
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18
render.c
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@ -184,9 +184,13 @@ render_cell(struct terminal *term, pixman_image_t *pix,
int x = term->x_margin + col * width;
int y = term->y_margin + row * height;
bool block_cursor = has_cursor && term->cursor_style == CURSOR_BLOCK;
bool is_selected = coord_is_selected(term, col, row);
bool block_cursor =
has_cursor &&
term->cursor_style == CURSOR_BLOCK &&
term->cursor_blink.state == CURSOR_BLINK_ON;
uint32_t _fg = 0;
uint32_t _bg = 0;
@ -240,7 +244,7 @@ render_cell(struct terminal *term, pixman_image_t *pix,
&(pixman_rectangle16_t){x, y, cell_cols * width, height});
/* Non-block cursors */
if (has_cursor && !block_cursor) {
if (has_cursor && !block_cursor && term->cursor_blink.state == CURSOR_BLINK_ON) {
pixman_color_t cursor_color;
if (term->cursor_color.text >> 31) {
cursor_color = color_hex_to_pixman(term->cursor_color.cursor);
@ -524,6 +528,15 @@ grid_render(struct terminal *term)
/* Detect cursor movement - we don't dirty cells touched
* by the cursor, since only the final cell matters. */
all_clean = false;
/* Force cursor blink to ON, to avoid blinking while moving cursor */
term->render.last_cursor.blink_state = CURSOR_BLINK_ON;
term->cursor_blink.state = CURSOR_BLINK_ON;
}
if (term->render.last_cursor.blink_state != term->cursor_blink.state) {
/* Need to re-draw cursor */
all_clean = false;
}
}
@ -675,6 +688,7 @@ grid_render(struct terminal *term)
cell->attrs.clean = 0;
term->render.last_cursor.cell = cell;
term->render.last_cursor.blink_state = term->cursor_blink.state;
int cols_updated = render_cell(
term, pix, cell, term->cursor.point.col, view_aligned_row, true);