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osd: guard against negative sizes

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This fixes the broken look of osd with very small width like:

  osd.window-switcher.width: 1
This commit is contained in:
tokyo4j 2025-04-14 20:55:45 +09:00 • committed by Hiroaki Yamamoto
parent f1c4720218
commit defa1d1a98
1 changed files with 16 additions and 6 deletions
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22
src/osd.c
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@ -301,6 +301,12 @@ create_osd_scene(struct output *output, struct wl_array *views)
/* Center workspace indicator on the x axis */
int x = (w - font_width(&font, workspace_name)) / 2;
if (x < 0) {
wlr_log(WLR_ERROR,
"not enough space for workspace name in osd");
goto error;
}
struct scaled_font_buffer *font_buffer =
scaled_font_buffer_create(output->osd_scene.tree);
wlr_scene_node_set_position(&font_buffer->scene_buffer->node,
@ -312,11 +318,17 @@ create_osd_scene(struct output *output, struct wl_array *views)
}
struct buf buf = BUF_INIT;
int nr_fields = wl_list_length(&rc.window_switcher.fields);
/* This is the width of the area available for text fields */
int available_width = w - 2 * theme->osd_border_width
int field_widths_sum = w - 2 * theme->osd_border_width
- 2 * theme->osd_window_switcher_padding
- 2 * theme->osd_window_switcher_item_active_border_width;
- 2 * theme->osd_window_switcher_item_active_border_width
- (nr_fields + 1) * theme->osd_window_switcher_item_padding_x;
if (field_widths_sum <= 0) {
wlr_log(WLR_ERROR, "Not enough spaces for osd contents");
goto error;
}
/* Draw text for each node */
struct view **view;
@ -347,12 +359,9 @@ create_osd_scene(struct output *output, struct wl_array *views)
struct wlr_scene_tree *item_root =
wlr_scene_tree_create(output->osd_scene.tree);
int nr_fields = wl_list_length(&rc.window_switcher.fields);
struct window_switcher_field *field;
wl_list_for_each(field, &rc.window_switcher.fields, link) {
int field_width = (available_width - (nr_fields + 1)
* theme->osd_window_switcher_item_padding_x)
* field->width / 100.0;
int field_width = field_widths_sum * field->width / 100.0;
struct wlr_scene_node *node = NULL;
int height = -1;
@ -411,6 +420,7 @@ create_osd_scene(struct output *output, struct wl_array *views)
}
buf_reset(&buf);
error:;
/* Center OSD */
struct wlr_box usable = output_usable_area_in_layout_coords(output);
wlr_scene_node_set_position(&output->osd_scene.tree->node,