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hekate/nyx/nyx_gui/libs/lvgl/lv_objx/lv_label.c
ctcaer@gmail.com c41f98039c [Nyx] Introducing hekate GUI, named Nyx! 
Version 0.8.0.

Expect dragons!
2019-06-30 04:03:00 +03:00

987 lines
32 KiB
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/**
* @file lv_rect.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_label.h"
#if USE_LV_LABEL != 0
#include "../lv_core/lv_obj.h"
#include "../lv_core/lv_group.h"
#include "../lv_core/lv_lang.h"
#include "../lv_draw/lv_draw.h"
#include "../lv_misc/lv_color.h"
#include "../lv_misc/lv_math.h"
/*********************
* DEFINES
*********************/
/*Test configurations*/
#ifndef LV_LABEL_SCROLL_SPEED
#define LV_LABEL_SCROLL_SPEED (25) /*Hor, or ver. scroll speed (px/sec) in 'LV_LABEL_LONG_SCROLL/ROLL' mode*/
#endif
#define ANIM_WAIT_CHAR_COUNT 3
#define LV_LABEL_DOT_END_INV 0xFFFF
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static lv_res_t lv_label_signal(lv_obj_t * label, lv_signal_t sign, void * param);
static bool lv_label_design(lv_obj_t * label, const lv_area_t * mask, lv_design_mode_t mode);
static void lv_label_refr_text(lv_obj_t * label);
static void lv_label_revert_dots(lv_obj_t * label);
#if USE_LV_ANIMATION
static void lv_label_set_offset_x(lv_obj_t * label, lv_coord_t x);
static void lv_label_set_offset_y(lv_obj_t * label, lv_coord_t y);
#endif
/**********************
* STATIC VARIABLES
**********************/
static lv_signal_func_t ancestor_signal;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a label objects
* @param par pointer to an object, it will be the parent of the new label
* @param copy pointer to a button object, if not NULL then the new object will be copied from it
* @return pointer to the created button
*/
lv_obj_t * lv_label_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("label create started");
/*Create a basic object*/
lv_obj_t * new_label = lv_obj_create(par, copy);
lv_mem_assert(new_label);
if(new_label == NULL) return NULL;
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_label);
/*Extend the basic object to a label object*/
lv_obj_allocate_ext_attr(new_label, sizeof(lv_label_ext_t));
lv_label_ext_t * ext = lv_obj_get_ext_attr(new_label);
lv_mem_assert(ext);
if(ext == NULL) return NULL;
ext->text = NULL;
ext->static_txt = 0;
ext->recolor = 0;
ext->body_draw = 0;
ext->align = LV_LABEL_ALIGN_LEFT;
ext->dot_end = LV_LABEL_DOT_END_INV;
ext->long_mode = LV_LABEL_LONG_EXPAND;
ext->anim_speed = LV_LABEL_SCROLL_SPEED;
ext->offset.x = 0;
ext->offset.y = 0;
#if USE_LV_MULTI_LANG
ext->lang_txt_id = LV_LANG_TXT_ID_NONE;
#endif
lv_obj_set_design_func(new_label, lv_label_design);
lv_obj_set_signal_func(new_label, lv_label_signal);
/*Init the new label*/
if(copy == NULL) {
lv_obj_set_click(new_label, false);
lv_label_set_long_mode(new_label, LV_LABEL_LONG_EXPAND);
lv_label_set_text(new_label, "Text");
lv_label_set_style(new_label, NULL); /*Inherit parent's style*/
}
/*Copy 'copy' if not NULL*/
else {
lv_label_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
lv_label_set_long_mode(new_label, lv_label_get_long_mode(copy));
lv_label_set_recolor(new_label, lv_label_get_recolor(copy));
lv_label_set_body_draw(new_label, lv_label_get_body_draw(copy));
lv_label_set_align(new_label, lv_label_get_align(copy));
if(copy_ext->static_txt == 0) lv_label_set_text(new_label, lv_label_get_text(copy));
else lv_label_set_static_text(new_label, lv_label_get_text(copy));
/*In DOT mode save the text byte-to-byte because a '\0' can be in the middle*/
if(copy_ext->long_mode == LV_LABEL_LONG_DOT) {
ext->text = lv_mem_realloc(ext->text, lv_mem_get_size(copy_ext->text));
lv_mem_assert(ext->text);
if(ext->text == NULL) return NULL;
memcpy(ext->text, copy_ext->text, lv_mem_get_size(copy_ext->text));
}
memcpy(ext->dot_tmp, copy_ext->dot_tmp, sizeof(ext->dot_tmp));
ext->dot_end = copy_ext->dot_end;
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_label);
}
LV_LOG_INFO("label created");
return new_label;
}
/*=====================
* Setter functions
*====================*/
/**
* Set a new text for a label. Memory will be allocated to store the text by the label.
* @param label pointer to a label object
* @param text '\0' terminated character string. NULL to refresh with the current text.
*/
void lv_label_set_text(lv_obj_t * label, const char * text)
{
lv_obj_invalidate(label);
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
/*If text is NULL then refresh */
if(text == NULL) {
lv_label_refr_text(label);
return;
}
if(ext->text == text) {
/*If set its own text then reallocate it (maybe its size changed)*/
ext->text = lv_mem_realloc(ext->text, strlen(ext->text) + 1);
lv_mem_assert(ext->text);
if(ext->text == NULL) return;
} else {
/*Allocate space for the new text*/
uint32_t len = strlen(text) + 1;
if(ext->text != NULL && ext->static_txt == 0) {
lv_mem_free(ext->text);
ext->text = NULL;
}
ext->text = lv_mem_alloc(len);
lv_mem_assert(ext->text);
if(ext->text == NULL) return;
strcpy(ext->text, text);
ext->static_txt = 0; /*Now the text is dynamically allocated*/
}
lv_label_refr_text(label);
}
/**
* Set a new text for a label from a character array. The array don't has to be '\0' terminated.
* Memory will be allocated to store the array by the label.
* @param label pointer to a label object
* @param array array of characters or NULL to refresh the label
* @param size the size of 'array' in bytes
*/
void lv_label_set_array_text(lv_obj_t * label, const char * array, uint16_t size)
{
lv_obj_invalidate(label);
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
/*If trying to set its own text or the array is NULL then refresh */
if(array == ext->text || array == NULL) {
lv_label_refr_text(label);
return;
}
/*Allocate space for the new text*/
if(ext->text != NULL && ext->static_txt == 0) {
lv_mem_free(ext->text);
ext->text = NULL;
}
ext->text = lv_mem_alloc(size + 1);
lv_mem_assert(ext->text);
if(ext->text == NULL) return;
memcpy(ext->text, array, size);
ext->text[size] = '\0';
ext->static_txt = 0; /*Now the text is dynamically allocated*/
lv_label_refr_text(label);
}
/**
* Set a static text. It will not be saved by the label so the 'text' variable
* has to be 'alive' while the label exist.
* @param label pointer to a label object
* @param text pointer to a text. NULL to refresh with the current text.
*/
void lv_label_set_static_text(lv_obj_t * label, const char * text)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
if(ext->static_txt == 0 && ext->text != NULL) {
lv_mem_free(ext->text);
ext->text = NULL;
}
if(text != NULL) {
ext->static_txt = 1;
ext->text = (char *) text;
}
lv_label_refr_text(label);
}
#if USE_LV_MULTI_LANG
/**
*Set a text ID which refers a the same text but in a different languages
* @param label pointer to a label object
* @param txt_id ID of the text
*/
void lv_label_set_text_id(lv_obj_t * label, uint32_t txt_id)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
ext->lang_txt_id = txt_id;
/*Apply the new language*/
label->signal_func(label, LV_SIGNAL_LANG_CHG, NULL);
}
#endif
/**
* Set the behavior of the label with longer text then the object size
* @param label pointer to a label object
* @param long_mode the new mode from 'lv_label_long_mode' enum.
* In LV_LONG_BREAK/LONG/ROLL the size of the label should be set AFTER this function
*/
void lv_label_set_long_mode(lv_obj_t * label, lv_label_long_mode_t long_mode)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
#if USE_LV_ANIMATION
/*Delete the old animation (if exists)*/
lv_anim_del(label, (lv_anim_fp_t) lv_obj_set_x);
lv_anim_del(label, (lv_anim_fp_t) lv_obj_set_y);
lv_anim_del(label, (lv_anim_fp_t) lv_label_set_offset_x);
lv_anim_del(label, (lv_anim_fp_t) lv_label_set_offset_y);
#endif
ext->offset.x = 0;
ext->offset.y = 0;
if(long_mode == LV_LABEL_LONG_ROLL || long_mode == LV_LABEL_LONG_CROP) ext->expand = 1;
else ext->expand = 0;
/*Restore the character under the dots*/
if(ext->long_mode == LV_LABEL_LONG_DOT && ext->dot_end != LV_LABEL_DOT_END_INV) {
lv_label_revert_dots(label);
}
ext->long_mode = long_mode;
lv_label_refr_text(label);
}
/**
* Set the align of the label (left or center)
* @param label pointer to a label object
* @param align 'LV_LABEL_ALIGN_LEFT' or 'LV_LABEL_ALIGN_LEFT'
*/
void lv_label_set_align(lv_obj_t * label, lv_label_align_t align)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
if(ext->align == align) return;
ext->align = align;
lv_obj_invalidate(label); /*Enough to invalidate because alignment is only drawing related (lv_refr_label_text() not required)*/
}
/**
* Enable the recoloring by in-line commands
* @param label pointer to a label object
* @param en true: enable recoloring, false: disable
*/
void lv_label_set_recolor(lv_obj_t * label, bool en)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
if(ext->recolor == en) return;
ext->recolor = en == false ? 0 : 1;
lv_label_refr_text(label); /*Refresh the text because the potential colo codes in text needs to be hided or revealed*/
}
/**
* Set the label to draw (or not draw) background specified in its style's body
* @param label pointer to a label object
* @param en true: draw body; false: don't draw body
*/
void lv_label_set_body_draw(lv_obj_t * label, bool en)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
if(ext->body_draw == en) return;
ext->body_draw = en == false ? 0 : 1;
lv_obj_refresh_ext_size(label);
lv_obj_invalidate(label);
}
/**
* Set the label's animation speed in LV_LABEL_LONG_ROLL and SCROLL modes
* @param label pointer to a label object
* @param anim_speed speed of animation in px/sec unit
*/
void lv_label_set_anim_speed(lv_obj_t * label, uint16_t anim_speed)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
if(ext->anim_speed == anim_speed) return;
ext->anim_speed = anim_speed;
if(ext->long_mode == LV_LABEL_LONG_ROLL || ext->long_mode == LV_LABEL_LONG_SCROLL) {
lv_label_refr_text(label);
}
}
/*=====================
* Getter functions
*====================*/
/**
* Get the text of a label
* @param label pointer to a label object
* @return the text of the label
*/
char * lv_label_get_text(const lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->text;
}
#if USE_LV_MULTI_LANG
/**
* Get the text ID of the label. (Used by the multi-language feature)
* @param label pointer to a label object
* @return ID of the text
*/
uint16_t lv_label_get_text_id(lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->lang_txt_id;
}
#endif
/**
* Get the long mode of a label
* @param label pointer to a label object
* @return the long mode
*/
lv_label_long_mode_t lv_label_get_long_mode(const lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->long_mode;
}
/**
* Get the align attribute
* @param label pointer to a label object
* @return LV_LABEL_ALIGN_LEFT or LV_LABEL_ALIGN_CENTER
*/
lv_label_align_t lv_label_get_align(const lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->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_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->recolor == 0 ? false : true;
}
/**
* Get the body draw attribute
* @param label pointer to a label object
* @return true: draw body; false: don't draw body
*/
bool lv_label_get_body_draw(const lv_obj_t * label)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->body_draw == 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_label_ext_t * ext = lv_obj_get_ext_attr(label);
return ext->anim_speed;
}
/**
* 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, uint16_t index, lv_point_t * pos)
{
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_obj_get_width(label);
lv_style_t * style = lv_obj_get_style(label);
const lv_font_t * font = style->text.font;
uint8_t letter_height = lv_font_get_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->align == LV_LABEL_ALIGN_CENTER) flag |= LV_TXT_FLAG_CENTER;
/*If the width will be expanded the set the max length to very big */
if(ext->long_mode == LV_LABEL_LONG_EXPAND || ext->long_mode == LV_LABEL_LONG_SCROLL) {
max_w = LV_COORD_MAX;
}
index = lv_txt_encoded_get_byte_id(txt, index);
/*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, style->text.letter_space, max_w, flag);
if(index < new_line_start || txt[new_line_start] == '\0') break; /*The line of 'index' letter begins at 'line_start'*/
y += letter_height + style->text.line_space;
line_start = new_line_start;
}
/*If the last character is line break then go to the next line*/
if(index > 0) {
if((txt[index - 1] == '\n' || txt[index - 1] == '\r') && txt[index] == '\0') {
y += letter_height + style->text.line_space;
line_start = index;
}
}
/*Calculate the x coordinate*/
lv_coord_t x = lv_txt_get_width(&txt[line_start], index - line_start,
font, style->text.letter_space, flag);
if(index != line_start) x += style->text.letter_space;
if(ext->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, style->text.letter_space, flag);
x += lv_obj_get_width(label) / 2 - line_w / 2;
} else if(ext->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, style->text.letter_space, flag);
x += lv_obj_get_width(label) - line_w;
}
pos->x = x;
pos->y = y;
}
/**
* 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)
*/
uint16_t lv_label_get_letter_on(const lv_obj_t * label, lv_point_t * pos)
{
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_obj_get_width(label);
lv_style_t * style = lv_obj_get_style(label);
const lv_font_t * font = style->text.font;
uint8_t letter_height = lv_font_get_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->align == LV_LABEL_ALIGN_CENTER) flag |= LV_TXT_FLAG_CENTER;
/*If the width will be expanded set the max length to very big */
if(ext->long_mode == LV_LABEL_LONG_EXPAND || ext->long_mode == LV_LABEL_LONG_SCROLL) {
max_w = LV_COORD_MAX;
}
/*Search the line of the index letter */;
while(txt[line_start] != '\0') {
new_line_start += lv_txt_get_next_line(&txt[line_start], font, style->text.letter_space, max_w, flag);
if(pos->y <= y + letter_height) break; /*The line is found (stored in 'line_start')*/
y += letter_height + style->text.line_space;
line_start = new_line_start;
}
/*Calculate the x coordinate*/
lv_coord_t x = 0;
if(ext->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, style->text.letter_space, flag);
x += lv_obj_get_width(label) / 2 - line_w / 2;
}
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;
while(i < new_line_start - 1) {
letter = lv_txt_encoded_next(txt, &i); /*Be careful 'i' already points to the next character*/
/*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*/
}
}
x += lv_font_get_width(font, letter);
if(pos->x < x) {
i = i_current;
break;
}
x += style->text.letter_space;
i_current = i;
}
return lv_encoded_get_char_id(txt, i);
}
/*=====================
* 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_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*/
uint32_t old_len = strlen(ext->text);
uint32_t ins_len = strlen(txt);
uint32_t new_len = ins_len + old_len;
ext->text = lv_mem_realloc(ext->text, new_len + 1);
lv_mem_assert(ext->text);
if(ext->text == NULL) return;
if(pos == LV_LABEL_POS_LAST) {
#if LV_TXT_UTF8 == 0
pos = old_len;
#else
pos = lv_txt_get_encoded_length(ext->text);
#endif
}
lv_txt_ins(ext->text, pos, txt);
lv_label_refr_text(label);
}
/**
* 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_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);
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the labels
* @param label pointer to a label object
* @param mask 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 true/false, depends on 'mode'
*/
static bool lv_label_design(lv_obj_t * label, const lv_area_t * mask, lv_design_mode_t mode)
{
/* A label never covers an area */
if(mode == LV_DESIGN_COVER_CHK) return false;
else if(mode == LV_DESIGN_DRAW_MAIN) {
lv_area_t coords;
lv_style_t * style = lv_obj_get_style(label);
lv_opa_t opa_scale = lv_obj_get_opa_scale(label);
lv_obj_get_coords(label, &coords);
#if USE_LV_GROUP
lv_group_t * g = lv_obj_get_group(label);
if(lv_group_get_focused(g) == label) {
lv_draw_rect(&coords, mask, style, opa_scale);
}
#endif
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
if(ext->body_draw) {
lv_area_t bg;
lv_obj_get_coords(label, &bg);
bg.x1 -= style->body.padding.hor;
bg.x2 += style->body.padding.hor;
bg.y1 -= style->body.padding.ver;
bg.y2 += style->body.padding.ver;
lv_draw_rect(&bg, mask, style, lv_obj_get_opa_scale(label));
}
/*TEST: draw a background for the label*/
//lv_draw_rect(&label->coords, mask, &lv_style_plain_color, LV_OPA_COVER);
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->align == LV_LABEL_ALIGN_CENTER) flag |= LV_TXT_FLAG_CENTER;
if(ext->align == LV_LABEL_ALIGN_RIGHT) flag |= LV_TXT_FLAG_RIGHT;
/* In ROLL mode the CENTER and RIGHT are pointless so remove them.
* (In addition they will result mis-alignment is this case)*/
if((ext->long_mode == LV_LABEL_LONG_ROLL) &&
(ext->align == LV_LABEL_ALIGN_CENTER || ext->align == LV_LABEL_ALIGN_RIGHT)) {
lv_point_t size;
lv_txt_get_size(&size, ext->text, style->text.font, style->text.letter_space, style->text.line_space, LV_COORD_MAX, flag);
if(size.x > lv_obj_get_width(label)) {
flag &= ~LV_TXT_FLAG_RIGHT;
flag &= ~LV_TXT_FLAG_CENTER;
}
}
lv_draw_label(&coords, mask, style, opa_scale, ext->text, flag, &ext->offset);
}
return true;
}
/**
* 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;
/* Include the ancient signal function */
res = ancestor_signal(label, sign, param);
if(res != LV_RES_OK) return res;
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;
}
} 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_CORD_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_REFR_EXT_SIZE) {
if(ext->body_draw) {
lv_style_t * style = lv_label_get_style(label);
label->ext_size = LV_MATH_MAX(label->ext_size, style->body.padding.hor);
label->ext_size = LV_MATH_MAX(label->ext_size, style->body.padding.ver);
}
} else if(sign == LV_SIGNAL_LANG_CHG) {
#if USE_LV_MULTI_LANG
if(ext->lang_txt_id != LV_LANG_TXT_ID_NONE) {
const char * lang_txt = lv_lang_get_text(ext->lang_txt_id);
if(lang_txt) {
lv_label_set_text(label, lang_txt);
} else {
LV_LOG_WARN("lv_lang_get_text return NULL for a label's text");
}
}
#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;
}
/**
* Refresh the label with its text stored in its extended data
* @param label pointer to a label object
*/
static 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;
lv_coord_t max_w = lv_obj_get_width(label);
lv_style_t * style = lv_obj_get_style(label);
const lv_font_t * font = style->text.font;
/*If the width will be expanded set the max length to very big */
if(ext->long_mode == LV_LABEL_LONG_EXPAND ||
ext->long_mode == LV_LABEL_LONG_SCROLL) {
max_w = LV_COORD_MAX;
}
/*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;
lv_txt_get_size(&size, ext->text, font, style->text.letter_space, style->text.line_space, max_w, flag);
/*Set the full size in expand mode*/
if(ext->long_mode == LV_LABEL_LONG_EXPAND || ext->long_mode == LV_LABEL_LONG_SCROLL) {
lv_obj_set_size(label, size.x, size.y);
/*Start scrolling if the label is greater then its parent*/
if(ext->long_mode == LV_LABEL_LONG_SCROLL) {
#if USE_LV_ANIMATION
lv_obj_t * parent = lv_obj_get_parent(label);
/*Delete the potential previous scroller animations*/
lv_anim_del(label, (lv_anim_fp_t) lv_obj_set_x);
lv_anim_del(label, (lv_anim_fp_t) lv_obj_set_y);
lv_anim_t anim;
anim.var = label;
anim.repeat = 1;
anim.playback = 1;
anim.start = 0;
anim.act_time = 0;
anim.end_cb = NULL;
anim.path = lv_anim_path_linear;
anim.playback_pause = (((lv_font_get_width(style->text.font, ' ') +
style->text.letter_space) * 1000) / ext->anim_speed) * ANIM_WAIT_CHAR_COUNT;
anim.repeat_pause = anim.playback_pause;
if(lv_obj_get_width(label) > lv_obj_get_width(parent)) {
anim.end = lv_obj_get_width(parent) - lv_obj_get_width(label);
anim.fp = (lv_anim_fp_t) lv_obj_set_x;
anim.time = lv_anim_speed_to_time(ext->anim_speed, anim.start, anim.end);
lv_anim_create(&anim);
} else if(lv_obj_get_height(label) > lv_obj_get_height(parent)) {
anim.end = lv_obj_get_height(parent) - lv_obj_get_height(label) - lv_font_get_height(font);
anim.fp = (lv_anim_fp_t)lv_obj_set_y;
anim.time = lv_anim_speed_to_time(ext->anim_speed, anim.start, anim.end);
lv_anim_create(&anim);
}
#endif
}
}
/*In roll mode keep the size but start offset animations*/
else if(ext->long_mode == LV_LABEL_LONG_ROLL) {
#if USE_LV_ANIMATION
lv_anim_t anim;
anim.var = label;
anim.repeat = 1;
anim.playback = 1;
anim.start = 0;
anim.act_time = 0;
anim.end_cb = NULL;
anim.path = lv_anim_path_linear;
anim.playback_pause = (((lv_font_get_width(style->text.font, ' ') + style->text.letter_space) * 1000) / ext->anim_speed) * ANIM_WAIT_CHAR_COUNT;
anim.repeat_pause = anim.playback_pause;
bool hor_anim = false;
if(size.x > lv_obj_get_width(label)) {
anim.end = lv_obj_get_width(label) - size.x;
anim.fp = (lv_anim_fp_t) lv_label_set_offset_x;
anim.time = lv_anim_speed_to_time(ext->anim_speed, anim.start, anim.end);
lv_anim_create(&anim);
hor_anim = true;
} else {
/*Delete the offset animation if not required*/
lv_anim_del(label, (lv_anim_fp_t) lv_label_set_offset_x);
ext->offset.x = 0;
}
if(size.y > lv_obj_get_height(label) && hor_anim == false) {
anim.end = lv_obj_get_height(label) - size.y - (lv_font_get_height(font));
anim.fp = (lv_anim_fp_t)lv_label_set_offset_y;
anim.time = lv_anim_speed_to_time(ext->anim_speed, anim.start, anim.end);
lv_anim_create(&anim);
} else {
/*Delete the offset animation if not required*/
lv_anim_del(label, (lv_anim_fp_t) lv_label_set_offset_y);
ext->offset.y = 0;
}
#endif
} else if(ext->long_mode == LV_LABEL_LONG_DOT) {
if(size.y <= lv_obj_get_height(label)) { /*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;
p.x = lv_obj_get_width(label) - (lv_font_get_width(style->text.font, '.') + style->text.letter_space) * LV_LABEL_DOT_NUM; /*Shrink with dots*/
p.y = lv_obj_get_height(label);
p.y -= p.y % (lv_font_get_height(style->text.font) + style->text.line_space); /*Round down to the last line*/
p.y -= style->text.line_space; /*Trim the last line space*/
uint32_t letter_id = lv_label_get_letter_on(label, &p);
#if LV_TXT_UTF8 == 0
/*Save letters under the dots and replace them with dots*/
uint8_t i;
for(i = 0; i < LV_LABEL_DOT_NUM; i++) {
ext->dot_tmp[i] = ext->text[letter_id + i];
ext->text[letter_id + i] = '.';
}
ext->dot_tmp[LV_LABEL_DOT_NUM] = ext->text[letter_id + LV_LABEL_DOT_NUM];
ext->text[letter_id + LV_LABEL_DOT_NUM] = '\0';
ext->dot_end = letter_id + LV_LABEL_DOT_NUM;
#else
/*Save letters under the dots and replace them with dots*/
uint32_t i;
uint32_t byte_id = lv_txt_encoded_get_byte_id(ext->text, letter_id);
uint32_t byte_id_ori = byte_id;
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);
}
memcpy(ext->dot_tmp, &ext->text[byte_id_ori], len);
ext->dot_tmp[len] = '\0'; /*Close with a zero*/
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;
#endif
}
}
/*In break mode only the height can change*/
else if(ext->long_mode == LV_LABEL_LONG_BREAK) {
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 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;
#if LV_TXT_UTF8 == 0
uint32_t i;
for(i = 0; i <= LV_LABEL_DOT_NUM; i++) {
ext->text[ext->dot_end - i] = ext->dot_tmp[LV_LABEL_DOT_NUM - i];
}
#else
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;
while(ext->dot_tmp[i] != '\0') {
ext->text[byte_i + i] = ext->dot_tmp[i];
i++;
}
#endif
ext->dot_end = LV_LABEL_DOT_END_INV;
}
#if USE_LV_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
#endif
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