113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
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/**
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* @file lv_theme.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "lv_theme.h"
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#include "../lv_core/lv_obj.h"
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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/**********************
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* STATIC VARIABLES
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**********************/
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#if LV_THEME_LIVE_UPDATE == 0
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static lv_theme_t * current_theme;
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#else
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/* If live update is used then a big `lv_style_t` array is used to store the real styles of the theme not only pointers.
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* On `lv_theme_set_current` the styles of the theme are copied to this array.
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* The pointers in `current_theme` are initialized to point to the styles in the array.
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* This way the theme styles will always point to the same memory address even after theme is change.
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* (The pointers in the theme points to the styles declared by the theme itself) */
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/* Store the styles in this array.
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* Can't determine the size in compile time because sizeof is not evaluated (should be `sizeof(lv_theme_t) / sizeof(lv_style_t*)`).
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* Error will be generated in run time if too small.*/
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static lv_style_t th_styles[120];
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static bool inited = false;
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static lv_theme_t current_theme;
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#endif
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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/**
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* Set a theme for the system.
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* From now, all the created objects will use styles from this theme by default
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* @param th pointer to theme (return value of: 'lv_theme_init_xxx()')
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*/
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void lv_theme_set_current(lv_theme_t * th)
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{
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#if LV_THEME_LIVE_UPDATE == 0
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current_theme = th;
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#else
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uint32_t style_num = sizeof(lv_theme_t) / sizeof(lv_style_t *); /*Number of styles in a theme*/
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if(!inited) {
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/*It's not sure `th_styles` is big enough. Check it now!*/
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if(style_num > sizeof(th_styles) / sizeof(lv_style_t)) {
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LV_LOG_ERROR("Themes: th_styles array is too small. Increase it's size!");
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while(1);
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}
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/*Initialize the style pointers `current_theme` to point to the `th_styles` style array */
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uint16_t i;
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lv_style_t ** cur_th_style_p = (lv_style_t **) ¤t_theme;
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for(i = 0; i < style_num; i++) {
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uintptr_t adr = (uintptr_t)&th_styles[i];
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memcpy(&cur_th_style_p[i], &adr, sizeof(lv_style_t *));
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}
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inited = true;
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}
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/*Copy the styles pointed by the new theme to the `th_styles` style array*/
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uint16_t i;
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lv_style_t ** th_style = (lv_style_t **) th;
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for(i = 0; i < style_num; i++) {
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uintptr_t s = (uintptr_t)th_style[i];
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if(s) memcpy(&th_styles[i], (void *)s, sizeof(lv_style_t));
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}
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/*Let the object know their style might change*/
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lv_obj_report_style_mod(NULL);
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#endif
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}
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/**
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* Get the current system theme.
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* @return pointer to the current system theme. NULL if not set.
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*/
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lv_theme_t * lv_theme_get_current(void)
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{
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#if LV_THEME_LIVE_UPDATE == 0
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return current_theme;
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#else
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if(!inited) return NULL;
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else return ¤t_theme;
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#endif
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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