1723 lines
51 KiB
C
1723 lines
51 KiB
C
/**
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* @file lv_label.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_label.h"
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#if LV_USE_LABEL != 0
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#include "../lv_core/lv_obj.h"
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#include "../lv_misc/lv_debug.h"
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#include "../lv_core/lv_group.h"
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#include "../lv_draw/lv_draw.h"
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#include "../lv_misc/lv_color.h"
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#include "../lv_misc/lv_math.h"
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#include "../lv_misc/lv_bidi.h"
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#include "../lv_misc/lv_txt_ap.h"
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#include "../lv_misc/lv_printf.h"
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#include "../lv_themes/lv_theme.h"
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/*********************
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* DEFINES
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*********************/
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#define LV_OBJX_NAME "lv_label"
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/*Test configurations*/
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#ifndef LV_LABEL_DEF_SCROLL_SPEED
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#define LV_LABEL_DEF_SCROLL_SPEED (25)
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#endif
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#define LV_LABEL_DOT_END_INV 0xFFFF
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#define LV_LABEL_HINT_HEIGHT_LIMIT \
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1024 /*Enable "hint" to buffer info about labels larger than this. (Speed up their drawing)*/
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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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static lv_res_t lv_label_signal(lv_obj_t *label, lv_signal_t sign, void *param);
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static lv_design_res_t lv_label_design(lv_obj_t *label, const lv_area_t *clip_area, lv_design_mode_t mode);
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static void lv_label_revert_dots(lv_obj_t *label);
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#if LV_USE_ANIMATION
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static void lv_label_set_offset_x(lv_obj_t *label, lv_coord_t x);
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static void lv_label_set_offset_y(lv_obj_t *label, lv_coord_t y);
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#endif
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static bool lv_label_set_dot_tmp(lv_obj_t *label, char *data, uint32_t len);
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static char *lv_label_get_dot_tmp(lv_obj_t *label);
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static void lv_label_dot_tmp_free(lv_obj_t *label);
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static void get_txt_coords(const lv_obj_t *label, lv_area_t *area);
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/**********************
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* STATIC VARIABLES
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**********************/
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static lv_signal_cb_t ancestor_signal;
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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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* Create a label objects
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* @param par pointer to an object, it will be the parent of the new label
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* @param copy pointer to a label object, if not NULL then the new object will be copied from it
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* @return pointer to the created button
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*/
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lv_obj_t *lv_label_create(lv_obj_t *par, const lv_obj_t *copy)
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{
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LV_LOG_TRACE("label create started");
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/*Create a basic object*/
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lv_obj_t *new_label = lv_obj_create(par, copy);
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LV_ASSERT_MEM(new_label);
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if (new_label == NULL) {
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return NULL;
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}
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if (ancestor_signal == NULL) {
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ancestor_signal = lv_obj_get_signal_cb(new_label);
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}
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/*Extend the basic object to a label object*/
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lv_obj_allocate_ext_attr(new_label, sizeof(lv_label_ext_t));
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lv_label_ext_t *ext = lv_obj_get_ext_attr(new_label);
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LV_ASSERT_MEM(ext);
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if (ext == NULL) {
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lv_obj_del(new_label);
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return NULL;
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}
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ext->text = NULL;
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ext->static_txt = 0;
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ext->recolor = 0;
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ext->align = LV_LABEL_ALIGN_AUTO;
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ext->dot_end = LV_LABEL_DOT_END_INV;
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ext->long_mode = LV_LABEL_LONG_EXPAND;
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#if LV_USE_ANIMATION
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ext->anim_speed = LV_LABEL_DEF_SCROLL_SPEED;
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#endif
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ext->offset.x = 0;
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ext->offset.y = 0;
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#if LV_LABEL_LONG_TXT_HINT
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ext->hint.line_start = -1;
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ext->hint.coord_y = 0;
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ext->hint.y = 0;
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#endif
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#if LV_LABEL_TEXT_SEL
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ext->sel_start = LV_DRAW_LABEL_NO_TXT_SEL;
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ext->sel_end = LV_DRAW_LABEL_NO_TXT_SEL;
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#endif
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ext->dot.tmp_ptr = NULL;
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ext->dot_tmp_alloc = 0;
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lv_obj_set_design_cb(new_label, lv_label_design);
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lv_obj_set_signal_cb(new_label, lv_label_signal);
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/*Init the new label*/
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if (copy == NULL) {
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lv_theme_apply(new_label, LV_THEME_LABEL);
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lv_obj_set_click(new_label, false);
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lv_label_set_long_mode(new_label, LV_LABEL_LONG_EXPAND);
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lv_label_set_text(new_label, "Text");
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}
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/*Copy 'copy' if not NULL*/
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else {
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lv_label_ext_t *copy_ext = lv_obj_get_ext_attr(copy);
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lv_label_set_long_mode(new_label, lv_label_get_long_mode(copy));
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lv_label_set_recolor(new_label, lv_label_get_recolor(copy));
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lv_label_set_align(new_label, lv_label_get_align(copy));
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if (copy_ext->static_txt == 0) {
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lv_label_set_text(new_label, lv_label_get_text(copy));
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} else {
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lv_label_set_text_static(new_label, lv_label_get_text(copy));
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}
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/*In DOT mode save the text byte-to-byte because a '\0' can be in the middle*/
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if (copy_ext->long_mode == LV_LABEL_LONG_DOT) {
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ext->text = lv_mem_realloc(ext->text, _lv_mem_get_size(copy_ext->text));
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LV_ASSERT_MEM(ext->text);
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if (ext->text == NULL) {
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return NULL;
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}
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_lv_memcpy(ext->text, copy_ext->text, _lv_mem_get_size(copy_ext->text));
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}
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if (copy_ext->dot_tmp_alloc && copy_ext->dot.tmp_ptr) {
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uint32_t len = (uint32_t)strlen(copy_ext->dot.tmp_ptr);
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lv_label_set_dot_tmp(new_label, ext->dot.tmp_ptr, len);
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} else {
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_lv_memcpy(ext->dot.tmp, copy_ext->dot.tmp, sizeof(ext->dot.tmp));
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}
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ext->dot_tmp_alloc = copy_ext->dot_tmp_alloc;
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ext->dot_end = copy_ext->dot_end;
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/*Refresh the style with new signal function*/
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lv_obj_refresh_style(new_label, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
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}
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LV_LOG_INFO("label created");
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return new_label;
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}
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/*=====================
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* Setter functions
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*====================*/
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/**
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* Set a new text for a label. Memory will be allocated to store the text by the label.
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* @param label pointer to a label object
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* @param text '\0' terminated character string. NULL to refresh with the current text.
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*/
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void lv_label_set_text(lv_obj_t *label, const char *text)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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lv_obj_invalidate(label);
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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/*If text is NULL then just refresh with the current text */
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if (text == NULL) {
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text = ext->text;
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}
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LV_ASSERT_STR(text);
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if (ext->text == text && ext->static_txt == 0) {
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/*If set its own text then reallocate it (maybe its size changed)*/
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#if LV_USE_ARABIC_PERSIAN_CHARS
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/*Get the size of the text and process it*/
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size_t len = _lv_txt_ap_calc_bytes_cnt(text);
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ext->text = lv_mem_realloc(ext->text, len);
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LV_ASSERT_MEM(ext->text);
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if (ext->text == NULL) {
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return;
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}
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_lv_txt_ap_proc(ext->text, ext->text);
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#else
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ext->text = lv_mem_realloc(ext->text, strlen(ext->text) + 1);
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#endif
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LV_ASSERT_MEM(ext->text);
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if (ext->text == NULL) {
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return;
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}
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} else {
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/*Free the old text*/
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if (ext->text != NULL && ext->static_txt == 0) {
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lv_mem_free(ext->text);
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ext->text = NULL;
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}
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#if LV_USE_ARABIC_PERSIAN_CHARS
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/*Get the size of the text and process it*/
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size_t len = _lv_txt_ap_calc_bytes_cnt(text);
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ext->text = lv_mem_alloc(len);
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LV_ASSERT_MEM(ext->text);
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if (ext->text == NULL) {
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return;
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}
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_lv_txt_ap_proc(text, ext->text);
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#else
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/*Get the size of the text*/
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size_t len = strlen(text) + 1;
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/*Allocate space for the new text*/
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ext->text = lv_mem_alloc(len);
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LV_ASSERT_MEM(ext->text);
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if (ext->text == NULL) {
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return;
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}
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strcpy(ext->text, text);
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#endif
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/*Now the text is dynamically allocated*/
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ext->static_txt = 0;
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}
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lv_label_refr_text(label);
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}
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/**
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* Set a new formatted text for a label. Memory will be allocated to store the text by the label.
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* @param label pointer to a label object
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* @param fmt `printf`-like format
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*/
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void lv_label_set_text_fmt(lv_obj_t *label, const char *fmt, ...)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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LV_ASSERT_STR(fmt);
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lv_obj_invalidate(label);
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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/*If text is NULL then refresh */
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if (fmt == NULL) {
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lv_label_refr_text(label);
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return;
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}
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if (ext->text != NULL && ext->static_txt == 0) {
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lv_mem_free(ext->text);
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ext->text = NULL;
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}
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va_list args;
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va_start(args, fmt);
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ext->text = _lv_txt_set_text_vfmt(fmt, args);
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va_end(args);
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ext->static_txt = 0; /*Now the text is dynamically allocated*/
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lv_label_refr_text(label);
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}
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/**
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* Set a static text. It will not be saved by the label so the 'text' variable
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* has to be 'alive' while the label exist.
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* @param label pointer to a label object
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* @param text pointer to a text. NULL to refresh with the current text.
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*/
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void lv_label_set_text_static(lv_obj_t *label, const char *text)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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if (ext->static_txt == 0 && ext->text != NULL) {
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lv_mem_free(ext->text);
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ext->text = NULL;
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}
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if (text != NULL) {
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ext->static_txt = 1;
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ext->text = (char *)text;
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}
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lv_label_refr_text(label);
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}
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/**
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* Set the behavior of the label with longer text then the object size
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* @param label pointer to a label object
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* @param long_mode the new mode from 'lv_label_long_mode' enum.
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* In LV_LONG_BREAK/LONG/ROLL the size of the label should be set AFTER this
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* function
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*/
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void lv_label_set_long_mode(lv_obj_t *label, lv_label_long_mode_t long_mode)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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#if LV_USE_ANIMATION
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/*Delete the old animation (if exists)*/
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lv_anim_del(label, (lv_anim_exec_xcb_t)lv_obj_set_x);
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lv_anim_del(label, (lv_anim_exec_xcb_t)lv_obj_set_y);
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lv_anim_del(label, (lv_anim_exec_xcb_t)lv_label_set_offset_x);
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lv_anim_del(label, (lv_anim_exec_xcb_t)lv_label_set_offset_y);
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#endif
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ext->offset.x = 0;
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ext->offset.y = 0;
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if (long_mode == LV_LABEL_LONG_SROLL || long_mode == LV_LABEL_LONG_SROLL_CIRC || long_mode == LV_LABEL_LONG_CROP) {
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ext->expand = 1;
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} else {
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ext->expand = 0;
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}
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/*Restore the character under the dots*/
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if (ext->long_mode == LV_LABEL_LONG_DOT && ext->dot_end != LV_LABEL_DOT_END_INV) {
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lv_label_revert_dots(label);
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}
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ext->long_mode = long_mode;
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lv_label_refr_text(label);
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}
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/**
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* Set the align of the label (left or center)
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* @param label pointer to a label object
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* @param align 'LV_LABEL_ALIGN_LEFT' or 'LV_LABEL_ALIGN_LEFT'
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*/
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void lv_label_set_align(lv_obj_t *label, lv_label_align_t align)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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if (ext->align == align) {
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return;
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}
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ext->align = align;
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lv_obj_invalidate(label); /*Enough to invalidate because alignment is only drawing related
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(lv_refr_label_text() not required)*/
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}
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/**
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* Enable the recoloring by in-line commands
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* @param label pointer to a label object
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* @param en true: enable recoloring, false: disable
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*/
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void lv_label_set_recolor(lv_obj_t *label, bool en)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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if (ext->recolor == en) {
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return;
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}
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ext->recolor = en == false ? 0 : 1;
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lv_label_refr_text(label); /*Refresh the text because the potential color codes in text needs to
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be hidden or revealed*/
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}
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/**
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* Set the label's animation speed in LV_LABEL_LONG_SROLL/SROLL_CIRC modes
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* @param label pointer to a label object
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* @param anim_speed speed of animation in px/sec unit
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*/
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void lv_label_set_anim_speed(lv_obj_t *label, uint16_t anim_speed)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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#if LV_USE_ANIMATION
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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if (ext->anim_speed == anim_speed) {
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return;
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}
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ext->anim_speed = anim_speed;
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if (ext->long_mode == LV_LABEL_LONG_SROLL || ext->long_mode == LV_LABEL_LONG_SROLL_CIRC) {
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lv_label_refr_text(label);
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}
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#else
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(void)label; /*Unused*/
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(void)anim_speed; /*Unused*/
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#endif
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}
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void lv_label_set_text_sel_start(lv_obj_t *label, uint32_t index)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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#if LV_LABEL_TEXT_SEL
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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ext->sel_start = index;
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lv_obj_invalidate(label);
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#else
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(void)label; /*Unused*/
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(void)index; /*Unused*/
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#endif
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}
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void lv_label_set_text_sel_end(lv_obj_t *label, uint32_t index)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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#if LV_LABEL_TEXT_SEL
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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ext->sel_end = index;
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lv_obj_invalidate(label);
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#else
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(void)label; /*Unused*/
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(void)index; /*Unused*/
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#endif
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}
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/*=====================
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* Getter functions
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*====================*/
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/**
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* Get the text of a label
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* @param label pointer to a label object
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* @return the text of the label
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*/
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char *lv_label_get_text(const lv_obj_t *label)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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return ext->text;
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}
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/**
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* Get the long mode of a label
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* @param label pointer to a label object
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* @return the long mode
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*/
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lv_label_long_mode_t lv_label_get_long_mode(const lv_obj_t *label)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
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return ext->long_mode;
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}
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/**
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* Get the align attribute
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* @param label pointer to a label object
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* @return LV_LABEL_ALIGN_LEFT or LV_LABEL_ALIGN_CENTER
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*/
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lv_label_align_t lv_label_get_align(const lv_obj_t *label)
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{
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LV_ASSERT_OBJ(label, LV_OBJX_NAME);
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|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
|
|
lv_label_align_t align = ext->align;
|
|
|
|
if (align == LV_LABEL_ALIGN_AUTO) {
|
|
#if LV_USE_BIDI
|
|
lv_bidi_dir_t base_dir = lv_obj_get_base_dir(label);
|
|
|
|
if (base_dir == LV_BIDI_DIR_AUTO) {
|
|
base_dir = _lv_bidi_detect_base_dir(ext->text);
|
|
}
|
|
|
|
if (base_dir == LV_BIDI_DIR_LTR) {
|
|
align = LV_LABEL_ALIGN_LEFT;
|
|
} else if (base_dir == LV_BIDI_DIR_RTL) {
|
|
align = LV_LABEL_ALIGN_RIGHT;
|
|
}
|
|
|
|
#else
|
|
align = LV_LABEL_ALIGN_LEFT;
|
|
#endif
|
|
}
|
|
|
|
return align;
|
|
}
|
|
|
|
/**
|
|
* Get the recoloring attribute
|
|
* @param label pointer to a label object
|
|
* @return true: recoloring is enabled, false: disable
|
|
*/
|
|
bool lv_label_get_recolor(const lv_obj_t *label)
|
|
{
|
|
LV_ASSERT_OBJ(label, LV_OBJX_NAME);
|
|
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
return ext->recolor == 0 ? false : true;
|
|
}
|
|
|
|
/**
|
|
* Get the label's animation speed in LV_LABEL_LONG_ROLL and SCROLL modes
|
|
* @param label pointer to a label object
|
|
* @return speed of animation in px/sec unit
|
|
*/
|
|
uint16_t lv_label_get_anim_speed(const lv_obj_t *label)
|
|
{
|
|
LV_ASSERT_OBJ(label, LV_OBJX_NAME);
|
|
|
|
#if LV_USE_ANIMATION
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
return ext->anim_speed;
|
|
#else
|
|
(void)label; /*Unused*/
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Get the relative x and y coordinates of a letter
|
|
* @param label pointer to a label object
|
|
* @param index index of the letter [0 ... text length]. Expressed in character index, not byte
|
|
* index (different in UTF-8)
|
|
* @param pos store the result here (E.g. index = 0 gives 0;0 coordinates)
|
|
*/
|
|
void lv_label_get_letter_pos(const lv_obj_t *label, uint32_t char_id, lv_point_t *pos)
|
|
{
|
|
LV_ASSERT_OBJ(label, LV_OBJX_NAME);
|
|
LV_ASSERT_NULL(pos);
|
|
|
|
const char *txt = lv_label_get_text(label);
|
|
lv_label_align_t align = lv_label_get_align(label);
|
|
|
|
if (txt[0] == '\0') {
|
|
pos->y = 0;
|
|
|
|
switch (align) {
|
|
case LV_LABEL_ALIGN_LEFT:
|
|
pos->x = 0;
|
|
break;
|
|
|
|
case LV_LABEL_ALIGN_RIGHT:
|
|
pos->x = lv_obj_get_width(label);
|
|
break;
|
|
|
|
case LV_LABEL_ALIGN_CENTER:
|
|
pos->x = lv_obj_get_width(label) / 2;
|
|
break;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
lv_area_t txt_coords;
|
|
get_txt_coords(label, &txt_coords);
|
|
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
uint32_t line_start = 0;
|
|
uint32_t new_line_start = 0;
|
|
lv_coord_t max_w = lv_area_get_width(&txt_coords);
|
|
const lv_font_t *font = lv_obj_get_style_text_font(label, LV_LABEL_PART_MAIN);
|
|
lv_style_int_t line_space = lv_obj_get_style_text_line_space(label, LV_LABEL_PART_MAIN);
|
|
lv_style_int_t letter_space = lv_obj_get_style_text_letter_space(label, LV_LABEL_PART_MAIN);
|
|
lv_coord_t letter_height = lv_font_get_line_height(font);
|
|
lv_coord_t y = 0;
|
|
lv_txt_flag_t flag = LV_TXT_FLAG_NONE;
|
|
|
|
if (ext->recolor != 0) {
|
|
flag |= LV_TXT_FLAG_RECOLOR;
|
|
}
|
|
|
|
if (ext->expand != 0) {
|
|
flag |= LV_TXT_FLAG_EXPAND;
|
|
}
|
|
|
|
if (ext->long_mode == LV_LABEL_LONG_EXPAND) {
|
|
flag |= LV_TXT_FLAG_FIT;
|
|
}
|
|
|
|
if (align == LV_LABEL_ALIGN_CENTER) {
|
|
flag |= LV_TXT_FLAG_CENTER;
|
|
}
|
|
|
|
if (align == LV_LABEL_ALIGN_RIGHT) {
|
|
flag |= LV_TXT_FLAG_RIGHT;
|
|
}
|
|
|
|
uint32_t byte_id = _lv_txt_encoded_get_byte_id(txt, char_id);
|
|
|
|
/*Search the line of the index letter */;
|
|
|
|
while (txt[new_line_start] != '\0') {
|
|
new_line_start += _lv_txt_get_next_line(&txt[line_start], font, letter_space, max_w, flag);
|
|
|
|
if (byte_id < new_line_start || txt[new_line_start] == '\0') {
|
|
break; /*The line of 'index' letter begins at 'line_start'*/
|
|
}
|
|
|
|
y += letter_height + line_space;
|
|
line_start = new_line_start;
|
|
}
|
|
|
|
/*If the last character is line break then go to the next line*/
|
|
if (byte_id > 0) {
|
|
if ((txt[byte_id - 1] == '\n' || txt[byte_id - 1] == '\r') && txt[byte_id] == '\0') {
|
|
y += letter_height + line_space;
|
|
line_start = byte_id;
|
|
}
|
|
}
|
|
|
|
const char *bidi_txt;
|
|
uint32_t visual_byte_pos;
|
|
#if LV_USE_BIDI
|
|
char *mutable_bidi_txt = NULL;
|
|
|
|
/*Handle Bidi*/
|
|
if (new_line_start == byte_id) {
|
|
visual_byte_pos = byte_id - line_start;
|
|
bidi_txt = &txt[line_start];
|
|
} else {
|
|
uint32_t line_char_id = _lv_txt_encoded_get_char_id(&txt[line_start], byte_id - line_start);
|
|
|
|
bool is_rtl;
|
|
uint32_t visual_char_pos = _lv_bidi_get_visual_pos(&txt[line_start], &mutable_bidi_txt, new_line_start - line_start,
|
|
lv_obj_get_base_dir(label), line_char_id, &is_rtl);
|
|
bidi_txt = mutable_bidi_txt;
|
|
|
|
if (is_rtl) {
|
|
visual_char_pos++;
|
|
}
|
|
|
|
visual_byte_pos = _lv_txt_encoded_get_byte_id(bidi_txt, visual_char_pos);
|
|
}
|
|
|
|
#else
|
|
bidi_txt = &txt[line_start];
|
|
visual_byte_pos = byte_id - line_start;
|
|
#endif
|
|
|
|
/*Calculate the x coordinate*/
|
|
lv_coord_t x = _lv_txt_get_width(bidi_txt, visual_byte_pos, font, letter_space, flag);
|
|
|
|
if (char_id != line_start) {
|
|
x += letter_space;
|
|
}
|
|
|
|
if (align == LV_LABEL_ALIGN_CENTER) {
|
|
lv_coord_t line_w;
|
|
line_w = _lv_txt_get_width(bidi_txt, new_line_start - line_start, font, letter_space, flag);
|
|
x += lv_area_get_width(&txt_coords) / 2 - line_w / 2;
|
|
|
|
} else if (align == LV_LABEL_ALIGN_RIGHT) {
|
|
lv_coord_t line_w;
|
|
line_w = _lv_txt_get_width(bidi_txt, new_line_start - line_start, font, letter_space, flag);
|
|
|
|
x += lv_area_get_width(&txt_coords) - line_w;
|
|
}
|
|
|
|
pos->x = x;
|
|
pos->y = y;
|
|
|
|
#if LV_USE_BIDI
|
|
|
|
if (mutable_bidi_txt) {
|
|
_lv_mem_buf_release(mutable_bidi_txt);
|
|
}
|
|
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Get the index of letter on a relative point of a label
|
|
* @param label pointer to label object
|
|
* @param pos pointer to point with coordinates on a the label
|
|
* @return the index of the letter on the 'pos_p' point (E.g. on 0;0 is the 0. letter)
|
|
* Expressed in character index and not byte index (different in UTF-8)
|
|
*/
|
|
uint32_t lv_label_get_letter_on(const lv_obj_t *label, lv_point_t *pos_in)
|
|
{
|
|
LV_ASSERT_OBJ(label, LV_OBJX_NAME);
|
|
LV_ASSERT_NULL(pos_in);
|
|
|
|
lv_point_t pos;
|
|
pos.x = pos_in->x - lv_obj_get_style_pad_left(label, LV_LABEL_PART_MAIN);
|
|
pos.y = pos_in->y - lv_obj_get_style_pad_top(label, LV_LABEL_PART_MAIN);
|
|
|
|
lv_area_t txt_coords;
|
|
get_txt_coords(label, &txt_coords);
|
|
const char *txt = lv_label_get_text(label);
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
uint32_t line_start = 0;
|
|
uint32_t new_line_start = 0;
|
|
lv_coord_t max_w = lv_area_get_width(&txt_coords);
|
|
const lv_font_t *font = lv_obj_get_style_text_font(label, LV_LABEL_PART_MAIN);
|
|
lv_style_int_t line_space = lv_obj_get_style_text_line_space(label, LV_LABEL_PART_MAIN);
|
|
lv_style_int_t letter_space = lv_obj_get_style_text_letter_space(label, LV_LABEL_PART_MAIN);
|
|
lv_coord_t letter_height = lv_font_get_line_height(font);
|
|
lv_coord_t y = 0;
|
|
lv_txt_flag_t flag = LV_TXT_FLAG_NONE;
|
|
uint32_t logical_pos;
|
|
char *bidi_txt;
|
|
|
|
if (ext->recolor != 0) {
|
|
flag |= LV_TXT_FLAG_RECOLOR;
|
|
}
|
|
|
|
if (ext->expand != 0) {
|
|
flag |= LV_TXT_FLAG_EXPAND;
|
|
}
|
|
|
|
if (ext->long_mode == LV_LABEL_LONG_EXPAND) {
|
|
flag |= LV_TXT_FLAG_FIT;
|
|
}
|
|
|
|
lv_label_align_t align = lv_label_get_align(label);
|
|
|
|
if (align == LV_LABEL_ALIGN_CENTER) {
|
|
flag |= LV_TXT_FLAG_CENTER;
|
|
}
|
|
|
|
if (align == LV_LABEL_ALIGN_RIGHT) {
|
|
flag |= LV_TXT_FLAG_RIGHT;
|
|
}
|
|
|
|
/*Search the line of the index letter */;
|
|
|
|
while (txt[line_start] != '\0') {
|
|
new_line_start += _lv_txt_get_next_line(&txt[line_start], font, letter_space, max_w, flag);
|
|
|
|
if (pos.y <= y + letter_height) {
|
|
/*The line is found (stored in 'line_start')*/
|
|
/* Include the NULL terminator in the last line */
|
|
uint32_t tmp = new_line_start;
|
|
uint32_t letter;
|
|
letter = _lv_txt_encoded_prev(txt, &tmp);
|
|
|
|
if (letter != '\n' && txt[new_line_start] == '\0') {
|
|
new_line_start++;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
y += letter_height + line_space;
|
|
|
|
line_start = new_line_start;
|
|
}
|
|
|
|
#if LV_USE_BIDI
|
|
bidi_txt = _lv_mem_buf_get(new_line_start - line_start + 1);
|
|
uint32_t txt_len = new_line_start - line_start;
|
|
|
|
if (new_line_start > 0 && txt[new_line_start - 1] == '\0' && txt_len > 0) {
|
|
txt_len--;
|
|
}
|
|
|
|
_lv_bidi_process_paragraph(txt + line_start, bidi_txt, txt_len, lv_obj_get_base_dir(label), NULL, 0);
|
|
#else
|
|
bidi_txt = (char *)txt + line_start;
|
|
#endif
|
|
|
|
/*Calculate the x coordinate*/
|
|
lv_coord_t x = 0;
|
|
|
|
if (align == LV_LABEL_ALIGN_CENTER) {
|
|
lv_coord_t line_w;
|
|
line_w = _lv_txt_get_width(bidi_txt, new_line_start - line_start, font, letter_space, flag);
|
|
x += lv_area_get_width(&txt_coords) / 2 - line_w / 2;
|
|
} else if (align == LV_LABEL_ALIGN_RIGHT) {
|
|
lv_coord_t line_w;
|
|
line_w = _lv_txt_get_width(bidi_txt, new_line_start - line_start, font, letter_space, flag);
|
|
x += lv_area_get_width(&txt_coords) - line_w;
|
|
}
|
|
|
|
lv_txt_cmd_state_t cmd_state = LV_TXT_CMD_STATE_WAIT;
|
|
|
|
uint32_t i = 0;
|
|
uint32_t i_act = i;
|
|
|
|
if (new_line_start > 0) {
|
|
while (i + line_start < new_line_start) {
|
|
/* Get the current letter.*/
|
|
uint32_t letter = _lv_txt_encoded_next(bidi_txt, &i);
|
|
|
|
/*Get the next letter too for kerning*/
|
|
uint32_t letter_next = _lv_txt_encoded_next(&bidi_txt[i], NULL);
|
|
|
|
/*Handle the recolor command*/
|
|
if ((flag & LV_TXT_FLAG_RECOLOR) != 0) {
|
|
if (_lv_txt_is_cmd(&cmd_state, bidi_txt[i]) != false) {
|
|
continue; /*Skip the letter is it is part of a command*/
|
|
}
|
|
}
|
|
|
|
lv_coord_t gw = lv_font_get_glyph_width(font, letter, letter_next);
|
|
|
|
/*Finish if the x position or the last char of the next line is reached*/
|
|
if (pos.x < x + gw || i + line_start == new_line_start || txt[i_act + line_start] == '\0') {
|
|
i = i_act;
|
|
break;
|
|
}
|
|
|
|
x += gw;
|
|
x += letter_space;
|
|
i_act = i;
|
|
}
|
|
}
|
|
|
|
#if LV_USE_BIDI
|
|
/*Handle Bidi*/
|
|
uint32_t cid = _lv_txt_encoded_get_char_id(bidi_txt, i);
|
|
|
|
if (txt[line_start + cid] == '\0') {
|
|
logical_pos = i;
|
|
} else {
|
|
bool is_rtl;
|
|
logical_pos = _lv_bidi_get_logical_pos(&txt[line_start], NULL,
|
|
txt_len, lv_obj_get_base_dir(label), cid, &is_rtl);
|
|
|
|
if (is_rtl) {
|
|
logical_pos++;
|
|
}
|
|
|
|
_lv_mem_buf_release(bidi_txt);
|
|
}
|
|
|
|
#else
|
|
logical_pos = _lv_txt_encoded_get_char_id(bidi_txt, i);
|
|
#endif
|
|
|
|
return logical_pos + _lv_txt_encoded_get_char_id(txt, line_start);
|
|
}
|
|
|
|
/**
|
|
* @brief Get the selection start index.
|
|
* @param label pointer to a label object.
|
|
* @return selection start index. `LV_LABEL_TXT_SEL_OFF` if nothing is selected.
|
|
*/
|
|
uint32_t lv_label_get_text_sel_start(const lv_obj_t *label)
|
|
{
|
|
LV_ASSERT_OBJ(label, LV_OBJX_NAME);
|
|
|
|
#if LV_LABEL_TEXT_SEL
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
return ext->sel_start;
|
|
|
|
#else
|
|
(void)label; /*Unused*/
|
|
return LV_LABEL_TEXT_SEL_OFF;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* @brief Get the selection end index.
|
|
* @param label pointer to a label object.
|
|
* @return selection end index. `LV_LABEL_TXT_SEL_OFF` if nothing is selected.
|
|
*/
|
|
uint32_t lv_label_get_text_sel_end(const lv_obj_t *label)
|
|
{
|
|
LV_ASSERT_OBJ(label, LV_OBJX_NAME);
|
|
|
|
#if LV_LABEL_TEXT_SEL
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
return ext->sel_end;
|
|
#else
|
|
(void)label; /*Unused*/
|
|
return LV_LABEL_TEXT_SEL_OFF;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Check if a character is drawn under a point.
|
|
* @param label Label object
|
|
* @param pos Point to check for character under
|
|
* @return whether a character is drawn under the point
|
|
*/
|
|
bool lv_label_is_char_under_pos(const lv_obj_t *label, lv_point_t *pos)
|
|
{
|
|
LV_ASSERT_OBJ(label, LV_OBJX_NAME);
|
|
LV_ASSERT_NULL(pos);
|
|
|
|
lv_area_t txt_coords;
|
|
get_txt_coords(label, &txt_coords);
|
|
const char *txt = lv_label_get_text(label);
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
uint32_t line_start = 0;
|
|
uint32_t new_line_start = 0;
|
|
lv_coord_t max_w = lv_area_get_width(&txt_coords);
|
|
const lv_font_t *font = lv_obj_get_style_text_font(label, LV_LABEL_PART_MAIN);
|
|
lv_style_int_t line_space = lv_obj_get_style_text_line_space(label, LV_LABEL_PART_MAIN);
|
|
lv_style_int_t letter_space = lv_obj_get_style_text_letter_space(label, LV_LABEL_PART_MAIN);
|
|
lv_coord_t letter_height = lv_font_get_line_height(font);
|
|
lv_coord_t y = 0;
|
|
lv_txt_flag_t flag = LV_TXT_FLAG_NONE;
|
|
lv_label_align_t align = lv_label_get_align(label);
|
|
|
|
if (ext->recolor != 0) {
|
|
flag |= LV_TXT_FLAG_RECOLOR;
|
|
}
|
|
|
|
if (ext->expand != 0) {
|
|
flag |= LV_TXT_FLAG_EXPAND;
|
|
}
|
|
|
|
if (ext->long_mode == LV_LABEL_LONG_EXPAND) {
|
|
flag |= LV_TXT_FLAG_FIT;
|
|
}
|
|
|
|
if (align == LV_LABEL_ALIGN_CENTER) {
|
|
flag |= LV_TXT_FLAG_CENTER;
|
|
}
|
|
|
|
/*Search the line of the index letter */;
|
|
|
|
while (txt[line_start] != '\0') {
|
|
new_line_start += _lv_txt_get_next_line(&txt[line_start], font, letter_space, max_w, flag);
|
|
|
|
if (pos->y <= y + letter_height) {
|
|
break; /*The line is found (stored in 'line_start')*/
|
|
}
|
|
|
|
y += letter_height + line_space;
|
|
|
|
line_start = new_line_start;
|
|
}
|
|
|
|
/*Calculate the x coordinate*/
|
|
lv_coord_t x = 0;
|
|
lv_coord_t last_x = 0;
|
|
|
|
if (align == LV_LABEL_ALIGN_CENTER) {
|
|
lv_coord_t line_w;
|
|
line_w = _lv_txt_get_width(&txt[line_start], new_line_start - line_start, font, letter_space, flag);
|
|
x += lv_area_get_width(&txt_coords) / 2 - line_w / 2;
|
|
} else if (align == LV_LABEL_ALIGN_RIGHT) {
|
|
lv_coord_t line_w;
|
|
line_w = _lv_txt_get_width(&txt[line_start], new_line_start - line_start, font, letter_space, flag);
|
|
x += lv_area_get_width(&txt_coords) - line_w;
|
|
}
|
|
|
|
lv_txt_cmd_state_t cmd_state = LV_TXT_CMD_STATE_WAIT;
|
|
|
|
uint32_t i = line_start;
|
|
uint32_t i_current = i;
|
|
uint32_t letter = '\0';
|
|
uint32_t letter_next = '\0';
|
|
|
|
if (new_line_start > 0) {
|
|
while (i <= new_line_start - 1) {
|
|
/* Get the current letter
|
|
* Be careful 'i' already points to the next character */
|
|
letter = _lv_txt_encoded_next(txt, &i);
|
|
|
|
/*Get the next letter for kerning*/
|
|
letter_next = _lv_txt_encoded_next(&txt[i], NULL);
|
|
|
|
/*Handle the recolor command*/
|
|
if ((flag & LV_TXT_FLAG_RECOLOR) != 0) {
|
|
if (_lv_txt_is_cmd(&cmd_state, txt[i]) != false) {
|
|
continue; /*Skip the letter is it is part of a command*/
|
|
}
|
|
}
|
|
|
|
last_x = x;
|
|
x += lv_font_get_glyph_width(font, letter, letter_next);
|
|
|
|
if (pos->x < x) {
|
|
i = i_current;
|
|
break;
|
|
}
|
|
|
|
x += letter_space;
|
|
i_current = i;
|
|
}
|
|
}
|
|
|
|
int32_t max_diff = lv_font_get_glyph_width(font, letter, letter_next) + letter_space + 1;
|
|
return (pos->x >= (last_x - letter_space) && pos->x <= (last_x + max_diff));
|
|
}
|
|
|
|
lv_style_list_t *lv_label_get_style(lv_obj_t *label, uint8_t type)
|
|
{
|
|
lv_style_list_t *style_dsc_p;
|
|
|
|
switch (type) {
|
|
case LV_LABEL_PART_MAIN:
|
|
style_dsc_p = &label->style_list;
|
|
break;
|
|
|
|
default:
|
|
style_dsc_p = NULL;
|
|
}
|
|
|
|
return style_dsc_p;
|
|
}
|
|
/*=====================
|
|
* Other functions
|
|
*====================*/
|
|
|
|
/**
|
|
* Insert a text to the label. The label text can not be static.
|
|
* @param label pointer to a label object
|
|
* @param pos character index to insert. Expressed in character index and not byte index (Different
|
|
* in UTF-8) 0: before first char. LV_LABEL_POS_LAST: after last char.
|
|
* @param txt pointer to the text to insert
|
|
*/
|
|
void lv_label_ins_text(lv_obj_t *label, uint32_t pos, const char *txt)
|
|
{
|
|
LV_ASSERT_OBJ(label, LV_OBJX_NAME);
|
|
LV_ASSERT_STR(txt);
|
|
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
|
|
/*Can not append to static text*/
|
|
if (ext->static_txt != 0) {
|
|
return;
|
|
}
|
|
|
|
lv_obj_invalidate(label);
|
|
|
|
/*Allocate space for the new text*/
|
|
size_t old_len = strlen(ext->text);
|
|
size_t ins_len = strlen(txt);
|
|
size_t new_len = ins_len + old_len;
|
|
ext->text = lv_mem_realloc(ext->text, new_len + 1);
|
|
LV_ASSERT_MEM(ext->text);
|
|
|
|
if (ext->text == NULL) {
|
|
return;
|
|
}
|
|
|
|
if (pos == LV_LABEL_POS_LAST) {
|
|
pos = _lv_txt_get_encoded_length(ext->text);
|
|
}
|
|
|
|
#if LV_USE_BIDI
|
|
char *bidi_buf = _lv_mem_buf_get(ins_len + 1);
|
|
LV_ASSERT_MEM(bidi_buf);
|
|
|
|
if (bidi_buf == NULL) {
|
|
return;
|
|
}
|
|
|
|
_lv_bidi_process(txt, bidi_buf, lv_obj_get_base_dir(label));
|
|
_lv_txt_ins(ext->text, pos, bidi_buf);
|
|
|
|
_lv_mem_buf_release(bidi_buf);
|
|
#else
|
|
_lv_txt_ins(ext->text, pos, txt);
|
|
#endif
|
|
lv_label_set_text(label, NULL);
|
|
}
|
|
|
|
/**
|
|
* Delete characters from a label. The label text can not be static.
|
|
* @param label pointer to a label object
|
|
* @param pos character index to insert. Expressed in character index and not byte index (Different
|
|
* in UTF-8) 0: before first char.
|
|
* @param cnt number of characters to cut
|
|
*/
|
|
void lv_label_cut_text(lv_obj_t *label, uint32_t pos, uint32_t cnt)
|
|
{
|
|
LV_ASSERT_OBJ(label, LV_OBJX_NAME);
|
|
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
|
|
/*Can not append to static text*/
|
|
if (ext->static_txt != 0) {
|
|
return;
|
|
}
|
|
|
|
lv_obj_invalidate(label);
|
|
|
|
char *label_txt = lv_label_get_text(label);
|
|
/*Delete the characters*/
|
|
_lv_txt_cut(label_txt, pos, cnt);
|
|
|
|
/*Refresh the label*/
|
|
lv_label_refr_text(label);
|
|
}
|
|
|
|
/**
|
|
* Refresh the label with its text stored in its extended data
|
|
* @param label pointer to a label object
|
|
*/
|
|
void lv_label_refr_text(lv_obj_t *label)
|
|
{
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
|
|
if (ext->text == NULL) {
|
|
return;
|
|
}
|
|
|
|
#if LV_LABEL_LONG_TXT_HINT
|
|
ext->hint.line_start = -1; /*The hint is invalid if the text changes*/
|
|
#endif
|
|
|
|
lv_area_t txt_coords;
|
|
get_txt_coords(label, &txt_coords);
|
|
lv_coord_t max_w = lv_area_get_width(&txt_coords);
|
|
const lv_font_t *font = lv_obj_get_style_text_font(label, LV_LABEL_PART_MAIN);
|
|
lv_style_int_t line_space = lv_obj_get_style_text_line_space(label, LV_LABEL_PART_MAIN);
|
|
lv_style_int_t letter_space = lv_obj_get_style_text_letter_space(label, LV_LABEL_PART_MAIN);
|
|
|
|
/*Calc. the height and longest line*/
|
|
lv_point_t size;
|
|
lv_txt_flag_t flag = LV_TXT_FLAG_NONE;
|
|
|
|
if (ext->recolor != 0) {
|
|
flag |= LV_TXT_FLAG_RECOLOR;
|
|
}
|
|
|
|
if (ext->expand != 0) {
|
|
flag |= LV_TXT_FLAG_EXPAND;
|
|
}
|
|
|
|
if (ext->long_mode == LV_LABEL_LONG_EXPAND) {
|
|
flag |= LV_TXT_FLAG_FIT;
|
|
}
|
|
|
|
_lv_txt_get_size(&size, ext->text, font, letter_space, line_space, max_w, flag);
|
|
|
|
/*Set the full size in expand mode*/
|
|
if (ext->long_mode == LV_LABEL_LONG_EXPAND) {
|
|
size.x += lv_obj_get_style_pad_left(label, LV_LABEL_PART_MAIN) + lv_obj_get_style_pad_right(label, LV_LABEL_PART_MAIN);
|
|
size.y += lv_obj_get_style_pad_top(label, LV_LABEL_PART_MAIN) + lv_obj_get_style_pad_bottom(label, LV_LABEL_PART_MAIN);
|
|
lv_obj_set_size(label, size.x, size.y);
|
|
}
|
|
/*In roll mode keep the size but start offset animations*/
|
|
else if (ext->long_mode == LV_LABEL_LONG_SROLL) {
|
|
#if LV_USE_ANIMATION
|
|
lv_anim_t a;
|
|
lv_anim_init(&a);
|
|
lv_anim_set_var(&a, label);
|
|
lv_anim_set_repeat_count(&a, LV_ANIM_REPEAT_INFINITE);
|
|
lv_anim_set_playback_delay(&a, (((lv_font_get_glyph_width(font, ' ', ' ') + letter_space) * 1000) /
|
|
ext->anim_speed) *
|
|
LV_LABEL_WAIT_CHAR_COUNT);
|
|
lv_anim_set_repeat_delay(&a, a.playback_delay);
|
|
|
|
bool hor_anim = false;
|
|
|
|
if (size.x > lv_area_get_width(&txt_coords)) {
|
|
lv_anim_set_values(&a, 0, lv_area_get_width(&txt_coords) - size.x);
|
|
lv_anim_set_exec_cb(&a, (lv_anim_exec_xcb_t)lv_label_set_offset_x);
|
|
lv_anim_set_time(&a, lv_anim_speed_to_time(ext->anim_speed, a.start, a.end));
|
|
lv_anim_set_playback_time(&a, a.time);
|
|
|
|
lv_anim_t *anim_cur = lv_anim_get(label, (lv_anim_exec_xcb_t)lv_label_set_offset_x);
|
|
int32_t act_time = 0;
|
|
bool playback_now = false;
|
|
|
|
if (anim_cur) {
|
|
act_time = anim_cur->act_time;
|
|
playback_now = anim_cur->playback_now;
|
|
}
|
|
|
|
if (act_time < a.time) {
|
|
a.act_time = act_time; /*To keep the old position*/
|
|
a.early_apply = 0;
|
|
|
|
if (playback_now) {
|
|
a.playback_now = 1;
|
|
/*Swap the start and end values*/
|
|
int32_t tmp;
|
|
tmp = a.start;
|
|
a.start = a.end;
|
|
a.end = tmp;
|
|
}
|
|
}
|
|
|
|
lv_anim_start(&a);
|
|
hor_anim = true;
|
|
} else {
|
|
/*Delete the offset animation if not required*/
|
|
lv_anim_del(label, (lv_anim_exec_xcb_t)lv_label_set_offset_x);
|
|
ext->offset.x = 0;
|
|
}
|
|
|
|
if (size.y > lv_area_get_height(&txt_coords) && hor_anim == false) {
|
|
lv_anim_set_values(&a, 0, lv_area_get_height(&txt_coords) - size.y - (lv_font_get_line_height(font)));
|
|
lv_anim_set_exec_cb(&a, (lv_anim_exec_xcb_t)lv_label_set_offset_y);
|
|
lv_anim_set_time(&a, lv_anim_speed_to_time(ext->anim_speed, a.start, a.end));
|
|
lv_anim_set_playback_time(&a, a.time);
|
|
|
|
lv_anim_t *anim_cur = lv_anim_get(label, (lv_anim_exec_xcb_t)lv_label_set_offset_y);
|
|
int32_t act_time = 0;
|
|
bool playback_now = false;
|
|
|
|
if (anim_cur) {
|
|
act_time = anim_cur->act_time;
|
|
playback_now = anim_cur->playback_now;
|
|
}
|
|
|
|
if (act_time < a.time) {
|
|
a.act_time = act_time; /*To keep the old position*/
|
|
a.early_apply = 0;
|
|
|
|
if (playback_now) {
|
|
a.playback_now = 1;
|
|
/*Swap the start and end values*/
|
|
int32_t tmp;
|
|
tmp = a.start;
|
|
a.start = a.end;
|
|
a.end = tmp;
|
|
}
|
|
}
|
|
|
|
lv_anim_start(&a);
|
|
} else {
|
|
/*Delete the offset animation if not required*/
|
|
lv_anim_del(label, (lv_anim_exec_xcb_t)lv_label_set_offset_y);
|
|
ext->offset.y = 0;
|
|
}
|
|
|
|
#endif
|
|
}
|
|
/*In roll inf. mode keep the size but start offset animations*/
|
|
else if (ext->long_mode == LV_LABEL_LONG_SROLL_CIRC) {
|
|
#if LV_USE_ANIMATION
|
|
lv_anim_t a;
|
|
lv_anim_init(&a);
|
|
lv_anim_set_var(&a, label);
|
|
lv_anim_set_repeat_count(&a, LV_ANIM_REPEAT_INFINITE);
|
|
|
|
bool hor_anim = false;
|
|
|
|
if (size.x > lv_area_get_width(&txt_coords)) {
|
|
lv_anim_set_values(&a, 0, -size.x - lv_font_get_glyph_width(font, ' ', ' ') * LV_LABEL_WAIT_CHAR_COUNT);
|
|
lv_anim_set_exec_cb(&a, (lv_anim_exec_xcb_t)lv_label_set_offset_x);
|
|
lv_anim_set_time(&a, lv_anim_speed_to_time(ext->anim_speed, a.start, a.end));
|
|
|
|
lv_anim_t *anim_cur = lv_anim_get(label, (lv_anim_exec_xcb_t)lv_label_set_offset_x);
|
|
int32_t act_time = anim_cur ? anim_cur->act_time : 0;
|
|
|
|
if (act_time < a.time) {
|
|
a.act_time = act_time; /*To keep the old position*/
|
|
a.early_apply = 0;
|
|
}
|
|
|
|
lv_anim_start(&a);
|
|
hor_anim = true;
|
|
} else {
|
|
/*Delete the offset animation if not required*/
|
|
lv_anim_del(label, (lv_anim_exec_xcb_t)lv_label_set_offset_x);
|
|
ext->offset.x = 0;
|
|
}
|
|
|
|
if (size.y > lv_area_get_height(&txt_coords) && hor_anim == false) {
|
|
lv_anim_set_values(&a, 0, -size.y - (lv_font_get_line_height(font)));
|
|
lv_anim_set_exec_cb(&a, (lv_anim_exec_xcb_t)lv_label_set_offset_y);
|
|
lv_anim_set_time(&a, lv_anim_speed_to_time(ext->anim_speed, a.start, a.end));
|
|
|
|
lv_anim_t *anim_cur = lv_anim_get(label, (lv_anim_exec_xcb_t)lv_label_set_offset_y);
|
|
int32_t act_time = anim_cur ? anim_cur->act_time : 0;
|
|
|
|
if (act_time < a.time) {
|
|
a.act_time = act_time; /*To keep the old position*/
|
|
a.early_apply = 0;
|
|
}
|
|
|
|
lv_anim_start(&a);
|
|
} else {
|
|
/*Delete the offset animation if not required*/
|
|
lv_anim_del(label, (lv_anim_exec_xcb_t)lv_label_set_offset_y);
|
|
ext->offset.y = 0;
|
|
}
|
|
|
|
#endif
|
|
} else if (ext->long_mode == LV_LABEL_LONG_DOT) {
|
|
if (size.y <= lv_area_get_height(&txt_coords)) /*No dots are required, the text is short enough*/
|
|
{
|
|
ext->dot_end = LV_LABEL_DOT_END_INV;
|
|
} else if (_lv_txt_get_encoded_length(ext->text) <= LV_LABEL_DOT_NUM) /*Don't turn to dots all the characters*/
|
|
{
|
|
ext->dot_end = LV_LABEL_DOT_END_INV;
|
|
} else {
|
|
lv_point_t p;
|
|
lv_coord_t y_overed;
|
|
p.x = lv_area_get_width(&txt_coords) -
|
|
(lv_font_get_glyph_width(font, '.', '.') + letter_space) *
|
|
LV_LABEL_DOT_NUM; /*Shrink with dots*/
|
|
p.y = lv_area_get_height(&txt_coords);
|
|
y_overed = p.y %
|
|
(lv_font_get_line_height(font) + line_space); /*Round down to the last line*/
|
|
|
|
if (y_overed >= lv_font_get_line_height(font)) {
|
|
p.y -= y_overed;
|
|
p.y += lv_font_get_line_height(font);
|
|
} else {
|
|
p.y -= y_overed;
|
|
p.y -= line_space;
|
|
}
|
|
|
|
uint32_t letter_id = lv_label_get_letter_on(label, &p);
|
|
|
|
/*Be sure there is space for the dots*/
|
|
size_t txt_len = strlen(ext->text);
|
|
uint32_t byte_id = _lv_txt_encoded_get_byte_id(ext->text, letter_id);
|
|
|
|
while (byte_id + LV_LABEL_DOT_NUM > txt_len) {
|
|
_lv_txt_encoded_prev(ext->text, &byte_id);
|
|
letter_id--;
|
|
}
|
|
|
|
/*Save letters under the dots and replace them with dots*/
|
|
uint32_t byte_id_ori = byte_id;
|
|
uint32_t i;
|
|
uint8_t len = 0;
|
|
|
|
for (i = 0; i <= LV_LABEL_DOT_NUM; i++) {
|
|
len += _lv_txt_encoded_size(&ext->text[byte_id]);
|
|
_lv_txt_encoded_next(ext->text, &byte_id);
|
|
}
|
|
|
|
if (lv_label_set_dot_tmp(label, &ext->text[byte_id_ori], len)) {
|
|
for (i = 0; i < LV_LABEL_DOT_NUM; i++) {
|
|
ext->text[byte_id_ori + i] = '.';
|
|
}
|
|
|
|
ext->text[byte_id_ori + LV_LABEL_DOT_NUM] = '\0';
|
|
ext->dot_end = letter_id + LV_LABEL_DOT_NUM;
|
|
}
|
|
}
|
|
}
|
|
/*In break mode only the height can change*/
|
|
else if (ext->long_mode == LV_LABEL_LONG_BREAK) {
|
|
size.y += lv_obj_get_style_pad_top(label, LV_LABEL_PART_MAIN) + lv_obj_get_style_pad_bottom(label, LV_LABEL_PART_MAIN);
|
|
lv_obj_set_height(label, size.y);
|
|
}
|
|
/*Do not set the size in Clip mode*/
|
|
else if (ext->long_mode == LV_LABEL_LONG_CROP) {
|
|
/*Do nothing*/
|
|
}
|
|
|
|
lv_obj_invalidate(label);
|
|
}
|
|
|
|
/**********************
|
|
* STATIC FUNCTIONS
|
|
**********************/
|
|
|
|
/**
|
|
* Handle the drawing related tasks of the labels
|
|
* @param label pointer to a label object
|
|
* @param clip_area the object will be drawn only in this area
|
|
* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
|
|
* (return 'true' if yes)
|
|
* LV_DESIGN_DRAW: draw the object (always return 'true')
|
|
* LV_DESIGN_DRAW_POST: drawing after every children are drawn
|
|
* @param return an element of `lv_design_res_t`
|
|
*/
|
|
static lv_design_res_t lv_label_design(lv_obj_t *label, const lv_area_t *clip_area, lv_design_mode_t mode)
|
|
{
|
|
/* A label never covers an area */
|
|
if (mode == LV_DESIGN_COVER_CHK) {
|
|
return LV_DESIGN_RES_NOT_COVER;
|
|
} else if (mode == LV_DESIGN_DRAW_MAIN) {
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
|
|
lv_coord_t w = lv_obj_get_style_transform_width(label, LV_LABEL_PART_MAIN);
|
|
lv_coord_t h = lv_obj_get_style_transform_height(label, LV_LABEL_PART_MAIN);
|
|
lv_area_t bg_coords;
|
|
lv_area_copy(&bg_coords, &label->coords);
|
|
bg_coords.x1 -= w;
|
|
bg_coords.x2 += w;
|
|
bg_coords.y1 -= h;
|
|
bg_coords.y2 += h;
|
|
|
|
lv_draw_rect_dsc_t draw_rect_dsc;
|
|
lv_draw_rect_dsc_init(&draw_rect_dsc);
|
|
lv_obj_init_draw_rect_dsc(label, LV_LABEL_PART_MAIN, &draw_rect_dsc);
|
|
|
|
lv_draw_rect(&bg_coords, clip_area, &draw_rect_dsc);
|
|
|
|
lv_area_t txt_coords;
|
|
get_txt_coords(label, &txt_coords);
|
|
|
|
lv_area_t txt_clip;
|
|
bool is_common = _lv_area_intersect(&txt_clip, clip_area, &txt_coords);
|
|
|
|
if (!is_common) {
|
|
return LV_DESIGN_RES_OK;
|
|
}
|
|
|
|
lv_label_align_t align = lv_label_get_align(label);
|
|
|
|
lv_txt_flag_t flag = LV_TXT_FLAG_NONE;
|
|
|
|
if (ext->recolor != 0) {
|
|
flag |= LV_TXT_FLAG_RECOLOR;
|
|
}
|
|
|
|
if (ext->expand != 0) {
|
|
flag |= LV_TXT_FLAG_EXPAND;
|
|
}
|
|
|
|
if (ext->long_mode == LV_LABEL_LONG_EXPAND) {
|
|
flag |= LV_TXT_FLAG_FIT;
|
|
}
|
|
|
|
if (align == LV_LABEL_ALIGN_CENTER) {
|
|
flag |= LV_TXT_FLAG_CENTER;
|
|
}
|
|
|
|
if (align == LV_LABEL_ALIGN_RIGHT) {
|
|
flag |= LV_TXT_FLAG_RIGHT;
|
|
}
|
|
|
|
lv_draw_label_dsc_t label_draw_dsc;
|
|
lv_draw_label_dsc_init(&label_draw_dsc);
|
|
|
|
label_draw_dsc.sel_start = lv_label_get_text_sel_start(label);
|
|
label_draw_dsc.sel_end = lv_label_get_text_sel_end(label);
|
|
label_draw_dsc.ofs_x = ext->offset.x;
|
|
label_draw_dsc.ofs_y = ext->offset.y;
|
|
label_draw_dsc.flag = flag;
|
|
lv_obj_init_draw_label_dsc(label, LV_LABEL_PART_MAIN, &label_draw_dsc);
|
|
|
|
/* In SROLL and SROLL_CIRC mode the CENTER and RIGHT are pointless so remove them.
|
|
* (In addition they will result misalignment is this case)*/
|
|
if ((ext->long_mode == LV_LABEL_LONG_SROLL || ext->long_mode == LV_LABEL_LONG_SROLL_CIRC) &&
|
|
(ext->align == LV_LABEL_ALIGN_CENTER || ext->align == LV_LABEL_ALIGN_RIGHT)) {
|
|
lv_point_t size;
|
|
_lv_txt_get_size(&size, ext->text, label_draw_dsc.font, label_draw_dsc.letter_space, label_draw_dsc.line_space,
|
|
LV_COORD_MAX, flag);
|
|
|
|
if (size.x > lv_area_get_width(&txt_coords)) {
|
|
label_draw_dsc.flag &= ~LV_TXT_FLAG_RIGHT;
|
|
label_draw_dsc.flag &= ~LV_TXT_FLAG_CENTER;
|
|
}
|
|
}
|
|
|
|
#if LV_LABEL_LONG_TXT_HINT
|
|
lv_draw_label_hint_t *hint = &ext->hint;
|
|
|
|
if (ext->long_mode == LV_LABEL_LONG_SROLL_CIRC || lv_area_get_height(&txt_coords) < LV_LABEL_HINT_HEIGHT_LIMIT) {
|
|
hint = NULL;
|
|
}
|
|
|
|
#else
|
|
/*Just for compatibility*/
|
|
lv_draw_label_hint_t *hint = NULL;
|
|
#endif
|
|
|
|
lv_draw_label(&txt_coords, &txt_clip, &label_draw_dsc, ext->text, hint);
|
|
|
|
if (ext->long_mode == LV_LABEL_LONG_SROLL_CIRC) {
|
|
lv_point_t size;
|
|
_lv_txt_get_size(&size, ext->text, label_draw_dsc.font, label_draw_dsc.letter_space, label_draw_dsc.line_space,
|
|
LV_COORD_MAX, flag);
|
|
|
|
/*Draw the text again next to the original to make an circular effect */
|
|
if (size.x > lv_area_get_width(&txt_coords)) {
|
|
label_draw_dsc.ofs_x = ext->offset.x + size.x +
|
|
lv_font_get_glyph_width(label_draw_dsc.font, ' ', ' ') * LV_LABEL_WAIT_CHAR_COUNT;
|
|
label_draw_dsc.ofs_y = ext->offset.y;
|
|
|
|
lv_draw_label(&txt_coords, &txt_clip, &label_draw_dsc, ext->text, hint);
|
|
}
|
|
|
|
/*Draw the text again below the original to make an circular effect */
|
|
if (size.y > lv_area_get_height(&txt_coords)) {
|
|
label_draw_dsc.ofs_x = ext->offset.x;
|
|
label_draw_dsc.ofs_y = ext->offset.y + size.y + lv_font_get_line_height(label_draw_dsc.font);
|
|
|
|
lv_draw_label(&txt_coords, &txt_clip, &label_draw_dsc, ext->text, hint);
|
|
}
|
|
}
|
|
}
|
|
|
|
return LV_DESIGN_RES_OK;
|
|
}
|
|
|
|
/**
|
|
* Signal function of the label
|
|
* @param label pointer to a label object
|
|
* @param sign a signal type from lv_signal_t enum
|
|
* @param param pointer to a signal specific variable
|
|
* @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted
|
|
*/
|
|
static lv_res_t lv_label_signal(lv_obj_t *label, lv_signal_t sign, void *param)
|
|
{
|
|
lv_res_t res;
|
|
|
|
if (sign == LV_SIGNAL_GET_STYLE) {
|
|
lv_get_style_info_t *info = param;
|
|
info->result = lv_label_get_style(label, info->part);
|
|
|
|
if (info->result != NULL) {
|
|
return LV_RES_OK;
|
|
} else {
|
|
return ancestor_signal(label, sign, param);
|
|
}
|
|
}
|
|
|
|
/* Include the ancient signal function */
|
|
res = ancestor_signal(label, sign, param);
|
|
|
|
if (res != LV_RES_OK) {
|
|
return res;
|
|
}
|
|
|
|
if (sign == LV_SIGNAL_GET_TYPE) {
|
|
return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME);
|
|
}
|
|
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
|
|
if (sign == LV_SIGNAL_CLEANUP) {
|
|
if (ext->static_txt == 0) {
|
|
lv_mem_free(ext->text);
|
|
ext->text = NULL;
|
|
}
|
|
|
|
lv_label_dot_tmp_free(label);
|
|
} else if (sign == LV_SIGNAL_STYLE_CHG) {
|
|
/*Revert dots for proper refresh*/
|
|
lv_label_revert_dots(label);
|
|
lv_label_refr_text(label);
|
|
} else if (sign == LV_SIGNAL_COORD_CHG) {
|
|
if (lv_area_get_width(&label->coords) != lv_area_get_width(param) ||
|
|
lv_area_get_height(&label->coords) != lv_area_get_height(param)) {
|
|
lv_label_revert_dots(label);
|
|
lv_label_refr_text(label);
|
|
}
|
|
} else if (sign == LV_SIGNAL_BASE_DIR_CHG) {
|
|
#if LV_USE_BIDI
|
|
|
|
if (ext->static_txt == 0) {
|
|
lv_label_set_text(label, NULL);
|
|
}
|
|
|
|
#endif
|
|
} else if (sign == LV_SIGNAL_GET_TYPE) {
|
|
lv_obj_type_t *buf = param;
|
|
uint8_t i;
|
|
|
|
for (i = 0; i < LV_MAX_ANCESTOR_NUM - 1; i++) /*Find the last set data*/
|
|
{
|
|
if (buf->type[i] == NULL) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
buf->type[i] = "lv_label";
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static void lv_label_revert_dots(lv_obj_t *label)
|
|
{
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
|
|
if (ext->long_mode != LV_LABEL_LONG_DOT) {
|
|
return;
|
|
}
|
|
|
|
if (ext->dot_end == LV_LABEL_DOT_END_INV) {
|
|
return;
|
|
}
|
|
|
|
uint32_t letter_i = ext->dot_end - LV_LABEL_DOT_NUM;
|
|
uint32_t byte_i = _lv_txt_encoded_get_byte_id(ext->text, letter_i);
|
|
|
|
/*Restore the characters*/
|
|
uint8_t i = 0;
|
|
char *dot_tmp = lv_label_get_dot_tmp(label);
|
|
|
|
while (ext->text[byte_i + i] != '\0') {
|
|
ext->text[byte_i + i] = dot_tmp[i];
|
|
i++;
|
|
}
|
|
|
|
ext->text[byte_i + i] = dot_tmp[i];
|
|
lv_label_dot_tmp_free(label);
|
|
|
|
ext->dot_end = LV_LABEL_DOT_END_INV;
|
|
}
|
|
|
|
#if LV_USE_ANIMATION
|
|
static void lv_label_set_offset_x(lv_obj_t *label, lv_coord_t x)
|
|
{
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
ext->offset.x = x;
|
|
lv_obj_invalidate(label);
|
|
}
|
|
|
|
static void lv_label_set_offset_y(lv_obj_t *label, lv_coord_t y)
|
|
{
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
ext->offset.y = y;
|
|
lv_obj_invalidate(label);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Store `len` characters from `data`. Allocates space if necessary.
|
|
*
|
|
* @param label pointer to label object
|
|
* @param len Number of characters to store.
|
|
* @return true on success.
|
|
*/
|
|
static bool lv_label_set_dot_tmp(lv_obj_t *label, char *data, uint32_t len)
|
|
{
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
lv_label_dot_tmp_free(label); /* Deallocate any existing space */
|
|
|
|
if (len > sizeof(char *)) {
|
|
/* Memory needs to be allocated. Allocates an additional byte
|
|
* for a NULL-terminator so it can be copied. */
|
|
ext->dot.tmp_ptr = lv_mem_alloc(len + 1);
|
|
|
|
if (ext->dot.tmp_ptr == NULL) {
|
|
LV_LOG_ERROR("Failed to allocate memory for dot_tmp_ptr");
|
|
return false;
|
|
}
|
|
|
|
_lv_memcpy(ext->dot.tmp_ptr, data, len);
|
|
ext->dot.tmp_ptr[len] = '\0';
|
|
ext->dot_tmp_alloc = true;
|
|
} else {
|
|
/* Characters can be directly stored in object */
|
|
ext->dot_tmp_alloc = false;
|
|
_lv_memcpy(ext->dot.tmp, data, len);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Get the stored dot_tmp characters
|
|
* @param label pointer to label object
|
|
* @return char pointer to a stored characters. Is *not* necessarily NULL-terminated.
|
|
*/
|
|
static char *lv_label_get_dot_tmp(lv_obj_t *label)
|
|
{
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
|
|
if (ext->dot_tmp_alloc) {
|
|
return ext->dot.tmp_ptr;
|
|
} else {
|
|
return ext->dot.tmp;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Free the dot_tmp_ptr field if it was previously allocated.
|
|
* Always clears the field
|
|
* @param label pointer to label object.
|
|
*/
|
|
static void lv_label_dot_tmp_free(lv_obj_t *label)
|
|
{
|
|
lv_label_ext_t *ext = lv_obj_get_ext_attr(label);
|
|
|
|
if (ext->dot_tmp_alloc && ext->dot.tmp_ptr) {
|
|
lv_mem_free(ext->dot.tmp_ptr);
|
|
}
|
|
|
|
ext->dot_tmp_alloc = false;
|
|
ext->dot.tmp_ptr = NULL;
|
|
}
|
|
|
|
static void get_txt_coords(const lv_obj_t *label, lv_area_t *area)
|
|
{
|
|
lv_obj_get_coords(label, area);
|
|
|
|
lv_coord_t left = lv_obj_get_style_pad_left(label, LV_LABEL_PART_MAIN);
|
|
lv_coord_t right = lv_obj_get_style_pad_right(label, LV_LABEL_PART_MAIN);
|
|
lv_coord_t top = lv_obj_get_style_pad_top(label, LV_LABEL_PART_MAIN);
|
|
lv_coord_t bottom = lv_obj_get_style_pad_bottom(label, LV_LABEL_PART_MAIN);
|
|
area->x1 += left;
|
|
area->x2 -= right;
|
|
area->y1 += top;
|
|
area->y2 -= bottom;
|
|
}
|
|
|
|
#endif
|