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js: Put the puzzle background colour in a CSS variable

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It's sometimes useful to be able to have an HTML element that visually
forms an extension of the puzzle's border.  By putting the puzzle's
colour 0 (which we assume to be its background) into a CSS variable,
such elements can do something like "background-color:
var(--puzzle-background)" to get that effect even if the puzzle uses a
non-default background colour.
This commit is contained in:
Ben Harris
2022-12-05 19:34:09 +00:00
parent e5b0bcae56
commit ea223a2350
2 changed files with 14 additions and 0 deletions
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3
emcc.c
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@ -51,6 +51,7 @@ extern void js_add_preset(int menuid, const char *name, int value);
extern int js_add_preset_submenu(int menuid, const char *name);
extern int js_get_selected_preset(void);
extern void js_select_preset(int n);
extern void js_set_background_colour(const char *bg);
extern void js_get_date_64(unsigned *p);
extern void js_update_permalinks(const char *desc, const char *seed);
extern void js_enable_undo_redo(bool undo, bool redo);
@ -1007,6 +1008,8 @@ int main(int argc, char **argv)
(unsigned)(0.5 + 255 * colours[i*3+2]));
colour_strings[i] = dupstr(col);
}
/* Put the background colour in a CSS variable. */
js_set_background_colour(colour_strings[0]);
/*
* Request notification when the game ids change (e.g. if the user