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lvgl_cpp/lvgl/extra/widgets/span/lv_span.c

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v0.1
2023-03-14 11:57:25 +00:00
/**
* @file lv_span.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_span.h"
#if LV_USE_SPAN != 0
#include "../../../misc/lv_assert.h"
/*********************
* DEFINES
*********************/
#define MY_CLASS &lv_spangroup_class
/**********************
* TYPEDEFS
**********************/
typedef struct {
lv_span_t * span;
const char * txt;
const lv_font_t * font;
uint16_t bytes;
lv_coord_t txt_w;
lv_coord_t line_h;
lv_coord_t letter_space;
} lv_snippet_t;
struct _snippet_stack {
lv_snippet_t stack[LV_SPAN_SNIPPET_STACK_SIZE];
uint16_t index;
};
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_spangroup_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void lv_spangroup_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void lv_spangroup_event(const lv_obj_class_t * class_p, lv_event_t * e);
static void draw_main(lv_event_t * e);
static void refresh_self_size(lv_obj_t * obj);
static const lv_font_t * lv_span_get_style_text_font(lv_obj_t * par, lv_span_t * span);
static lv_coord_t lv_span_get_style_text_letter_space(lv_obj_t * par, lv_span_t * span);
static lv_color_t lv_span_get_style_text_color(lv_obj_t * par, lv_span_t * span);
static lv_opa_t lv_span_get_style_text_opa(lv_obj_t * par, lv_span_t * span);
static lv_opa_t lv_span_get_style_text_blend_mode(lv_obj_t * par, lv_span_t * span);
static int32_t lv_span_get_style_text_decor(lv_obj_t * par, lv_span_t * span);
static inline void span_text_check(const char ** text);
static void lv_draw_span(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx);
static bool lv_txt_get_snippet(const char * txt, const lv_font_t * font, lv_coord_t letter_space,
lv_coord_t max_width, lv_text_flag_t flag, lv_coord_t * use_width,
uint32_t * end_ofs);
static void lv_snippet_clear(void);
static uint16_t lv_get_snippet_cnt(void);
static void lv_snippet_push(lv_snippet_t * item);
static lv_snippet_t * lv_get_snippet(uint16_t index);
static lv_coord_t convert_indent_pct(lv_obj_t * spans, lv_coord_t width);
/**********************
* STATIC VARIABLES
**********************/
static struct _snippet_stack snippet_stack;
const lv_obj_class_t lv_spangroup_class = {
.base_class = &lv_obj_class,
.constructor_cb = lv_spangroup_constructor,
.destructor_cb = lv_spangroup_destructor,
.event_cb = lv_spangroup_event,
.instance_size = sizeof(lv_spangroup_t),
.width_def = LV_SIZE_CONTENT,
.height_def = LV_SIZE_CONTENT,
};
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
lv_obj_t * lv_spangroup_create(lv_obj_t * par)
{
lv_obj_t * obj = lv_obj_class_create_obj(&lv_spangroup_class, par);
lv_obj_class_init_obj(obj);
return obj;
}
lv_span_t * lv_spangroup_new_span(lv_obj_t * obj)
{
if(obj == NULL) {
return NULL;
}
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
lv_span_t * span = _lv_ll_ins_tail(&spans->child_ll);
LV_ASSERT_MALLOC(span);
lv_style_init(&span->style);
span->txt = (char *)"";
span->static_flag = 1;
span->spangroup = obj;
refresh_self_size(obj);
return span;
}
void lv_spangroup_del_span(lv_obj_t * obj, lv_span_t * span)
{
if(obj == NULL || span == NULL) {
return;
}
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
lv_span_t * cur_span;
_LV_LL_READ(&spans->child_ll, cur_span) {
if(cur_span == span) {
_lv_ll_remove(&spans->child_ll, cur_span);
if(cur_span->txt && cur_span->static_flag == 0) {
lv_mem_free(cur_span->txt);
}
lv_style_reset(&cur_span->style);
lv_mem_free(cur_span);
break;
}
}
refresh_self_size(obj);
}
/*=====================
* Setter functions
*====================*/
void lv_span_set_text(lv_span_t * span, const char * text)
{
if(span == NULL || text == NULL) {
return;
}
if(span->txt == NULL || span->static_flag == 1) {
span->txt = lv_mem_alloc(strlen(text) + 1);
}
else {
span->txt = lv_mem_realloc(span->txt, strlen(text) + 1);
}
span->static_flag = 0;
strcpy(span->txt, text);
refresh_self_size(span->spangroup);
}
void lv_span_set_text_static(lv_span_t * span, const char * text)
{
if(span == NULL || text == NULL) {
return;
}
if(span->txt && span->static_flag == 0) {
lv_mem_free(span->txt);
}
span->static_flag = 1;
span->txt = (char *)text;
refresh_self_size(span->spangroup);
}
void lv_spangroup_set_align(lv_obj_t * obj, lv_text_align_t align)
{
lv_obj_set_style_text_align(obj, align, LV_PART_MAIN);
}
void lv_spangroup_set_overflow(lv_obj_t * obj, lv_span_overflow_t overflow)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
if(spans->overflow == overflow) return;
spans->overflow = overflow;
lv_obj_invalidate(obj);
}
void lv_spangroup_set_indent(lv_obj_t * obj, lv_coord_t indent)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
if(spans->indent == indent) return;
spans->indent = indent;
refresh_self_size(obj);
}
void lv_spangroup_set_mode(lv_obj_t * obj, lv_span_mode_t mode)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
spans->mode = mode;
lv_spangroup_refr_mode(obj);
}
/*=====================
* Getter functions
*====================*/
lv_span_t * lv_spangroup_get_child(const lv_obj_t * obj, int32_t id)
{
if(obj == NULL) {
return NULL;
}
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
lv_ll_t * linked_list = &spans->child_ll;
bool traverse_forwards = (id >= 0);
int32_t cur_idx = 0;
lv_ll_node_t * cur_node = linked_list->head;
/*If using a negative index, start from the tail and use cur -1 to indicate the end*/
if(!traverse_forwards) {
cur_idx = -1;
cur_node = linked_list->tail;
}
while(cur_node != NULL) {
if(cur_idx == id) {
return (lv_span_t *) cur_node;
}
if(traverse_forwards) {
cur_node = (lv_ll_node_t *) _lv_ll_get_next(linked_list, cur_node);
cur_idx++;
}
else {
cur_node = (lv_ll_node_t *) _lv_ll_get_prev(linked_list, cur_node);
cur_idx--;
}
}
return NULL;
}
uint32_t lv_spangroup_get_child_cnt(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
if(obj == NULL) {
return 0;
}
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
return _lv_ll_get_len(&(spans->child_ll));
}
lv_text_align_t lv_spangroup_get_align(lv_obj_t * obj)
{
return lv_obj_get_style_text_align(obj, LV_PART_MAIN);
}
lv_span_overflow_t lv_spangroup_get_overflow(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
return spans->overflow;
}
lv_coord_t lv_spangroup_get_indent(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
return spans->indent;
}
lv_span_mode_t lv_spangroup_get_mode(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
return spans->mode;
}
void lv_spangroup_refr_mode(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
if(spans->mode == LV_SPAN_MODE_EXPAND) {
lv_obj_set_width(obj, LV_SIZE_CONTENT);
lv_obj_set_height(obj, LV_SIZE_CONTENT);
}
else if(spans->mode == LV_SPAN_MODE_BREAK) {
if(lv_obj_get_style_width(obj, LV_PART_MAIN) == LV_SIZE_CONTENT) {
lv_obj_set_width(obj, 100);
}
lv_obj_set_height(obj, LV_SIZE_CONTENT);
}
else if(spans->mode == LV_SPAN_MODE_FIXED) {
/* use this mode, The user needs to set the size. */
/* This is just to prevent an infinite loop. */
if(lv_obj_get_style_width(obj, LV_PART_MAIN) == LV_SIZE_CONTENT) {
lv_obj_set_width(obj, 100);
}
if(lv_obj_get_style_height(obj, LV_PART_MAIN) == LV_SIZE_CONTENT) {
lv_coord_t width = lv_obj_get_style_width(obj, LV_PART_MAIN);
if(LV_COORD_IS_PCT(width)) {
width = 100;
}
lv_coord_t height = lv_spangroup_get_expand_height(obj, width);
lv_obj_set_content_height(obj, height);
}
}
refresh_self_size(obj);
}
lv_coord_t lv_spangroup_get_max_line_h(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
lv_coord_t max_line_h = 0;
lv_span_t * cur_span;
_LV_LL_READ(&spans->child_ll, cur_span) {
const lv_font_t * font = lv_span_get_style_text_font(obj, cur_span);
lv_coord_t line_h = lv_font_get_line_height(font);
if(line_h > max_line_h) {
max_line_h = line_h;
}
}
return max_line_h;
}
uint32_t lv_spangroup_get_expand_width(lv_obj_t * obj, uint32_t max_width)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
if(_lv_ll_get_head(&spans->child_ll) == NULL) {
return 0;
}
uint32_t width = LV_COORD_IS_PCT(spans->indent) ? 0 : spans->indent;
lv_span_t * cur_span;
lv_coord_t letter_space = 0;
_LV_LL_READ(&spans->child_ll, cur_span) {
const lv_font_t * font = lv_span_get_style_text_font(obj, cur_span);
letter_space = lv_span_get_style_text_letter_space(obj, cur_span);
uint32_t j = 0;
const char * cur_txt = cur_span->txt;
span_text_check(&cur_txt);
while(cur_txt[j] != '\0') {
if(max_width > 0 && width >= max_width) {
return max_width;
}
uint32_t letter = _lv_txt_encoded_next(cur_txt, &j);
uint32_t letter_next = _lv_txt_encoded_next(&cur_txt[j], NULL);
uint16_t letter_w = lv_font_get_glyph_width(font, letter, letter_next);
width = width + letter_w + letter_space;
}
}
return width - letter_space;
}
lv_coord_t lv_spangroup_get_expand_height(lv_obj_t * obj, lv_coord_t width)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
if(_lv_ll_get_head(&spans->child_ll) == NULL || width <= 0) {
return 0;
}
/* init draw variable */
lv_text_flag_t txt_flag = LV_TEXT_FLAG_NONE;
lv_coord_t line_space = lv_obj_get_style_text_line_space(obj, LV_PART_MAIN);
lv_coord_t max_width = width;
lv_coord_t indent = convert_indent_pct(obj, max_width);
lv_coord_t max_w = max_width - indent; /* first line need minus indent */
/* coords of draw span-txt */
lv_point_t txt_pos;
txt_pos.y = 0;
txt_pos.x = 0 + indent; /* first line need add indent */
lv_span_t * cur_span = _lv_ll_get_head(&spans->child_ll);
const char * cur_txt = cur_span->txt;
span_text_check(&cur_txt);
uint32_t cur_txt_ofs = 0;
lv_snippet_t snippet; /* use to save cur_span info and push it to stack */
memset(&snippet, 0, sizeof(snippet));
/* the loop control how many lines need to draw */
while(cur_span) {
int snippet_cnt = 0;
lv_coord_t max_line_h = 0; /* the max height of span-font when a line have a lot of span */
/* the loop control to find a line and push the relevant span info into stack */
while(1) {
/* switch to the next span when current is end */
if(cur_txt[cur_txt_ofs] == '\0') {
cur_span = _lv_ll_get_next(&spans->child_ll, cur_span);
if(cur_span == NULL) break;
cur_txt = cur_span->txt;
span_text_check(&cur_txt);
cur_txt_ofs = 0;
/* maybe also cur_txt[cur_txt_ofs] == '\0' */
continue;
}
/* init span info to snippet. */
if(cur_txt_ofs == 0) {
snippet.span = cur_span;
snippet.font = lv_span_get_style_text_font(obj, cur_span);
snippet.letter_space = lv_span_get_style_text_letter_space(obj, cur_span);
snippet.line_h = lv_font_get_line_height(snippet.font) + line_space;
}
/* get current span text line info */
uint32_t next_ofs = 0;
lv_coord_t use_width = 0;
bool isfill = lv_txt_get_snippet(&cur_txt[cur_txt_ofs], snippet.font, snippet.letter_space,
max_w, txt_flag, &use_width, &next_ofs);
/* break word deal width */
if(isfill && next_ofs > 0 && snippet_cnt > 0) {
if(max_w < use_width) {
break;
}
uint32_t tmp_ofs = next_ofs;
uint32_t letter = _lv_txt_encoded_prev(&cur_txt[cur_txt_ofs], &tmp_ofs);
if(!(letter == '\0' || letter == '\n' || letter == '\r' || _lv_txt_is_break_char(letter))) {
tmp_ofs = 0;
letter = _lv_txt_encoded_next(&cur_txt[cur_txt_ofs + next_ofs], &tmp_ofs);
if(!(letter == '\0' || letter == '\n' || letter == '\r' || _lv_txt_is_break_char(letter))) {
break;
}
}
}
snippet.txt = &cur_txt[cur_txt_ofs];
snippet.bytes = next_ofs;
snippet.txt_w = use_width;
cur_txt_ofs += next_ofs;
if(max_line_h < snippet.line_h) {
max_line_h = snippet.line_h;
}
snippet_cnt ++;
max_w = max_w - use_width - snippet.letter_space;
if(isfill || max_w <= 0) {
break;
}
}
/* next line init */
txt_pos.x = 0;
txt_pos.y += max_line_h;
max_w = max_width;
}
txt_pos.y -= line_space;
return txt_pos.y;
}
/**********************
* STATIC FUNCTIONS
**********************/
static void lv_spangroup_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
_lv_ll_init(&spans->child_ll, sizeof(lv_span_t));
spans->indent = 0;
spans->mode = LV_SPAN_MODE_EXPAND;
spans->overflow = LV_SPAN_OVERFLOW_CLIP;
spans->cache_w = 0;
spans->cache_h = 0;
spans->refresh = 1;
}
static void lv_spangroup_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
lv_span_t * cur_span = _lv_ll_get_head(&spans->child_ll);
while(cur_span) {
_lv_ll_remove(&spans->child_ll, cur_span);
if(cur_span->txt && cur_span->static_flag == 0) {
lv_mem_free(cur_span->txt);
}
lv_style_reset(&cur_span->style);
lv_mem_free(cur_span);
cur_span = _lv_ll_get_head(&spans->child_ll);
}
}
static void lv_spangroup_event(const lv_obj_class_t * class_p, lv_event_t * e)
{
LV_UNUSED(class_p);
/* Call the ancestor's event handler */
if(lv_obj_event_base(MY_CLASS, e) != LV_RES_OK) return;
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * obj = lv_event_get_target(e);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
if(code == LV_EVENT_DRAW_MAIN) {
draw_main(e);
}
else if(code == LV_EVENT_STYLE_CHANGED) {
refresh_self_size(obj);
}
else if(code == LV_EVENT_SIZE_CHANGED) {
refresh_self_size(obj);
}
else if(code == LV_EVENT_GET_SELF_SIZE) {
lv_coord_t width = 0;
lv_coord_t height = 0;
lv_point_t * self_size = lv_event_get_param(e);
if(spans->mode == LV_SPAN_MODE_EXPAND) {
if(spans->refresh) {
spans->cache_w = (lv_coord_t)lv_spangroup_get_expand_width(obj, 0);
spans->cache_h = lv_spangroup_get_max_line_h(obj);
spans->refresh = 0;
}
width = spans->cache_w;
height = spans->cache_h;
}
else if(spans->mode == LV_SPAN_MODE_BREAK) {
width = lv_obj_get_content_width(obj);
if(self_size->y >= 0) {
if(width != spans->cache_w || spans->refresh) {
height = lv_spangroup_get_expand_height(obj, width);
spans->cache_w = width;
spans->cache_h = height;
spans->refresh = 0;
}
else {
height = spans->cache_h;
}
}
}
else if(spans->mode == LV_SPAN_MODE_FIXED) {
width = self_size->x >= 0 ? lv_obj_get_content_width(obj) : 0;
height = self_size->y >= 0 ? lv_obj_get_content_height(obj) : 0;
}
self_size->x = LV_MAX(self_size->x, width);
self_size->y = LV_MAX(self_size->y, height);
}
}
static void draw_main(lv_event_t * e)
{
lv_obj_t * obj = lv_event_get_target(e);
lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
lv_draw_span(obj, draw_ctx);
}
/**
* @return true for txt fill the max_width.
*/
static bool lv_txt_get_snippet(const char * txt, const lv_font_t * font,
lv_coord_t letter_space, lv_coord_t max_width, lv_text_flag_t flag,
lv_coord_t * use_width, uint32_t * end_ofs)
{
if(txt == NULL || txt[0] == '\0') {
*end_ofs = 0;
*use_width = 0;
return false;
}
uint32_t ofs = _lv_txt_get_next_line(txt, font, letter_space, max_width, use_width, flag);
*end_ofs = ofs;
if(txt[ofs] == '\0' && *use_width < max_width) {
return false;
}
else {
return true;
}
}
static void lv_snippet_push(lv_snippet_t * item)
{
if(snippet_stack.index < LV_SPAN_SNIPPET_STACK_SIZE) {
memcpy(&snippet_stack.stack[snippet_stack.index], item, sizeof(lv_snippet_t));
snippet_stack.index++;
}
else {
LV_LOG_ERROR("span draw stack overflow, please set LV_SPAN_SNIPPET_STACK_SIZE too larger");
}
}
static uint16_t lv_get_snippet_cnt(void)
{
return snippet_stack.index;
}
static lv_snippet_t * lv_get_snippet(uint16_t index)
{
return &snippet_stack.stack[index];
}
static void lv_snippet_clear(void)
{
snippet_stack.index = 0;
}
static const lv_font_t * lv_span_get_style_text_font(lv_obj_t * par, lv_span_t * span)
{
const lv_font_t * font;
lv_style_value_t value;
lv_res_t res = lv_style_get_prop(&span->style, LV_STYLE_TEXT_FONT, &value);
if(res != LV_RES_OK) {
font = lv_obj_get_style_text_font(par, LV_PART_MAIN);
}
else {
font = (const lv_font_t *)value.ptr;
}
return font;
}
static lv_coord_t lv_span_get_style_text_letter_space(lv_obj_t * par, lv_span_t * span)
{
lv_coord_t letter_space;
lv_style_value_t value;
lv_res_t res = lv_style_get_prop(&span->style, LV_STYLE_TEXT_LETTER_SPACE, &value);
if(res != LV_RES_OK) {
letter_space = lv_obj_get_style_text_letter_space(par, LV_PART_MAIN);
}
else {
letter_space = (lv_coord_t)value.num;
}
return letter_space;
}
static lv_color_t lv_span_get_style_text_color(lv_obj_t * par, lv_span_t * span)
{
lv_style_value_t value;
lv_res_t res = lv_style_get_prop(&span->style, LV_STYLE_TEXT_COLOR, &value);
if(res != LV_RES_OK) {
value.color = lv_obj_get_style_text_color(par, LV_PART_MAIN);
}
return value.color;
}
static lv_opa_t lv_span_get_style_text_opa(lv_obj_t * par, lv_span_t * span)
{
lv_opa_t opa;
lv_style_value_t value;
lv_res_t res = lv_style_get_prop(&span->style, LV_STYLE_TEXT_OPA, &value);
if(res != LV_RES_OK) {
opa = (lv_opa_t)lv_obj_get_style_text_opa(par, LV_PART_MAIN);
}
else {
opa = (lv_opa_t)value.num;
}
return opa;
}
static lv_blend_mode_t lv_span_get_style_text_blend_mode(lv_obj_t * par, lv_span_t * span)
{
lv_blend_mode_t mode;
lv_style_value_t value;
lv_res_t res = lv_style_get_prop(&span->style, LV_STYLE_BLEND_MODE, &value);
if(res != LV_RES_OK) {
mode = (lv_blend_mode_t)lv_obj_get_style_blend_mode(par, LV_PART_MAIN);
}
else {
mode = (lv_blend_mode_t)value.num;
}
return mode;
}
static int32_t lv_span_get_style_text_decor(lv_obj_t * par, lv_span_t * span)
{
int32_t decor;
lv_style_value_t value;
lv_res_t res = lv_style_get_prop(&span->style, LV_STYLE_TEXT_DECOR, &value);
if(res != LV_RES_OK) {
decor = (lv_text_decor_t)lv_obj_get_style_text_decor(par, LV_PART_MAIN);;
}
else {
decor = (int32_t)value.num;
}
return decor;
}
static inline void span_text_check(const char ** text)
{
if(*text == NULL) {
*text = "";
LV_LOG_ERROR("occur an error that span text == NULL");
}
}
static lv_coord_t convert_indent_pct(lv_obj_t * obj, lv_coord_t width)
{
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
lv_coord_t indent = spans->indent;
if(LV_COORD_IS_PCT(spans->indent)) {
if(spans->mode == LV_SPAN_MODE_EXPAND) {
indent = 0;
}
else {
indent = (width * LV_COORD_GET_PCT(spans->indent)) / 100;
}
}
return indent;
}
/**
* draw span group
* @param spans obj handle
* @param coords coordinates of the label
* @param mask the label will be drawn only in this area
*/
static void lv_draw_span(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx)
{
lv_area_t coords;
lv_obj_get_content_coords(obj, &coords);
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
/* return if not span */
if(_lv_ll_get_head(&spans->child_ll) == NULL) {
return;
}
/* return if no draw area */
lv_area_t clip_area;
if(!_lv_area_intersect(&clip_area, &coords, draw_ctx->clip_area)) return;
const lv_area_t * clip_area_ori = draw_ctx->clip_area;
draw_ctx->clip_area = &clip_area;
/* init draw variable */
lv_text_flag_t txt_flag = LV_TEXT_FLAG_NONE;
lv_coord_t line_space = lv_obj_get_style_text_line_space(obj, LV_PART_MAIN);;
lv_coord_t max_width = lv_area_get_width(&coords);
lv_coord_t indent = convert_indent_pct(obj, max_width);
lv_coord_t max_w = max_width - indent; /* first line need minus indent */
lv_opa_t obj_opa = lv_obj_get_style_opa(obj, LV_PART_MAIN);
/* coords of draw span-txt */
lv_point_t txt_pos;
txt_pos.y = coords.y1;
txt_pos.x = coords.x1 + indent; /* first line need add indent */
lv_span_t * cur_span = _lv_ll_get_head(&spans->child_ll);
const char * cur_txt = cur_span->txt;
span_text_check(&cur_txt);
uint32_t cur_txt_ofs = 0;
lv_snippet_t snippet; /* use to save cur_span info and push it to stack */
lv_memset_00(&snippet, sizeof(snippet));
lv_draw_label_dsc_t label_draw_dsc;
lv_draw_label_dsc_init(&label_draw_dsc);
bool is_first_line = true;
/* the loop control how many lines need to draw */
while(cur_span) {
bool is_end_line = false;
bool ellipsis_valid = false;
lv_coord_t max_line_h = 0; /* the max height of span-font when a line have a lot of span */
lv_snippet_clear();
/* the loop control to find a line and push the relevant span info into stack */
while(1) {
/* switch to the next span when current is end */
if(cur_txt[cur_txt_ofs] == '\0') {
cur_span = _lv_ll_get_next(&spans->child_ll, cur_span);
if(cur_span == NULL) break;
cur_txt = cur_span->txt;
span_text_check(&cur_txt);
cur_txt_ofs = 0;
/* maybe also cur_txt[cur_txt_ofs] == '\0' */
continue;
}
/* init span info to snippet. */
if(cur_txt_ofs == 0) {
snippet.span = cur_span;
snippet.font = lv_span_get_style_text_font(obj, cur_span);
snippet.letter_space = lv_span_get_style_text_letter_space(obj, cur_span);
snippet.line_h = lv_font_get_line_height(snippet.font) + line_space;
}
if(spans->overflow == LV_SPAN_OVERFLOW_ELLIPSIS) {
/* curretn line span txt overflow, don't push */
if(txt_pos.y + snippet.line_h - line_space > coords.y2 + 1) {
ellipsis_valid = true;
is_end_line = true;
break;
}
}
/* get current span text line info */
uint32_t next_ofs = 0;
lv_coord_t use_width = 0;
bool isfill = lv_txt_get_snippet(&cur_txt[cur_txt_ofs], snippet.font, snippet.letter_space,
max_w, txt_flag, &use_width, &next_ofs);
if(isfill) {
lv_coord_t next_line_h = snippet.line_h;
if(cur_txt[cur_txt_ofs + next_ofs] == '\0') {
next_line_h = 0;
lv_span_t * next_span = _lv_ll_get_next(&spans->child_ll, cur_span);
if(next_span) { /* have the next line */
next_line_h = lv_font_get_line_height(lv_span_get_style_text_font(obj, next_span)) + line_space;
}
}
lv_coord_t cur_line_h = max_line_h < snippet.line_h ? snippet.line_h : max_line_h;
if(txt_pos.y + cur_line_h + next_line_h - line_space > coords.y2 + 1) { /* for overflow if is end line. */
if(cur_txt[cur_txt_ofs + next_ofs] != '\0') {
next_ofs = strlen(&cur_txt[cur_txt_ofs]);
use_width = lv_txt_get_width(&cur_txt[cur_txt_ofs], next_ofs, snippet.font, snippet.letter_space, txt_flag);
ellipsis_valid = spans->overflow == LV_SPAN_OVERFLOW_ELLIPSIS ? true : false;
is_end_line = true;
}
}
else if(next_ofs > 0 && lv_get_snippet_cnt() > 0) {
/* To prevent infinite loops, the _lv_txt_get_next_line() may return incomplete words, */
/* This phenomenon should be avoided when lv_get_snippet_cnt() > 0 */
if(max_w < use_width) {
break;
}
uint32_t tmp_ofs = next_ofs;
uint32_t letter = _lv_txt_encoded_prev(&cur_txt[cur_txt_ofs], &tmp_ofs);
if(!(letter == '\0' || letter == '\n' || letter == '\r' || _lv_txt_is_break_char(letter))) {
tmp_ofs = 0;
letter = _lv_txt_encoded_next(&cur_txt[cur_txt_ofs + next_ofs], &tmp_ofs);
if(!(letter == '\0' || letter == '\n' || letter == '\r' || _lv_txt_is_break_char(letter))) {
break;
}
}
}
}
snippet.txt = &cur_txt[cur_txt_ofs];
snippet.bytes = next_ofs;
snippet.txt_w = use_width;
cur_txt_ofs += next_ofs;
if(max_line_h < snippet.line_h) {
max_line_h = snippet.line_h;
}
lv_snippet_push(&snippet);
max_w = max_w - use_width - snippet.letter_space;
if(isfill || max_w <= 0) {
break;
}
}
/* start current line deal width */
uint16_t item_cnt = lv_get_snippet_cnt();
if(item_cnt == 0) { /* break if stack is empty */
break;
}
/*Go the first visible line*/
if(txt_pos.y + max_line_h < clip_area.y1) {
goto Next_line_init;
}
/* align deal with */
lv_text_align_t align = lv_obj_get_style_text_align(obj, LV_PART_MAIN);
if(align == LV_TEXT_ALIGN_CENTER || align == LV_TEXT_ALIGN_RIGHT) {
lv_coord_t align_ofs = 0;
lv_coord_t txts_w = is_first_line ? indent : 0;
for(int i = 0; i < item_cnt; i++) {
lv_snippet_t * pinfo = lv_get_snippet(i);
txts_w = txts_w + pinfo->txt_w + pinfo->letter_space;
}
txts_w -= lv_get_snippet(item_cnt - 1)->letter_space;
align_ofs = max_width > txts_w ? max_width - txts_w : 0;
if(align == LV_TEXT_ALIGN_CENTER) {
align_ofs = align_ofs >> 1;
}
txt_pos.x += align_ofs;
}
/* draw line letters */
int i;
for(i = 0; i < item_cnt; i++) {
lv_snippet_t * pinfo = lv_get_snippet(i);
/* bidi deal with:todo */
const char * bidi_txt = pinfo->txt;
lv_point_t pos;
pos.x = txt_pos.x;
pos.y = txt_pos.y + max_line_h - pinfo->line_h;
label_draw_dsc.color = lv_span_get_style_text_color(obj, pinfo->span);
label_draw_dsc.opa = lv_span_get_style_text_opa(obj, pinfo->span);
label_draw_dsc.font = lv_span_get_style_text_font(obj, pinfo->span);
label_draw_dsc.blend_mode = lv_span_get_style_text_blend_mode(obj, pinfo->span);
if(obj_opa < LV_OPA_MAX) {
label_draw_dsc.opa = (uint16_t)((uint16_t)label_draw_dsc.opa * obj_opa) >> 8;
}
uint32_t txt_bytes = pinfo->bytes;
/* overflow */
uint16_t dot_letter_w = 0;
uint16_t dot_width = 0;
if(ellipsis_valid) {
dot_letter_w = lv_font_get_glyph_width(pinfo->font, '.', '.');
dot_width = dot_letter_w * 3;
}
lv_coord_t ellipsis_width = coords.x1 + max_width - dot_width;
uint32_t j = 0;
while(j < txt_bytes) {
/* skip invalid fields */
if(pos.x > clip_area.x2) {
break;
}
uint32_t letter = _lv_txt_encoded_next(bidi_txt, &j);
uint32_t letter_next = _lv_txt_encoded_next(&bidi_txt[j], NULL);
int32_t letter_w = lv_font_get_glyph_width(pinfo->font, letter, letter_next);
/* skip invalid fields */
if(pos.x + letter_w + pinfo->letter_space < clip_area.x1) {
if(letter_w > 0) {
pos.x = pos.x + letter_w + pinfo->letter_space;
}
continue;
}
if(ellipsis_valid && pos.x + letter_w + pinfo->letter_space > ellipsis_width) {
for(int ell = 0; ell < 3; ell++) {
lv_draw_letter(draw_ctx, &label_draw_dsc, &pos, '.');
pos.x = pos.x + dot_letter_w + pinfo->letter_space;
}
if(pos.x <= ellipsis_width) {
pos.x = ellipsis_width + 1;
}
break;
}
else {
lv_draw_letter(draw_ctx, &label_draw_dsc, &pos, letter);
if(letter_w > 0) {
pos.x = pos.x + letter_w + pinfo->letter_space;
}
}
}
if(ellipsis_valid && i == item_cnt - 1 && pos.x <= ellipsis_width) {
for(int ell = 0; ell < 3; ell++) {
lv_draw_letter(draw_ctx, &label_draw_dsc, &pos, '.');
pos.x = pos.x + dot_letter_w + pinfo->letter_space;
}
}
/* draw decor */
lv_text_decor_t decor = lv_span_get_style_text_decor(obj, pinfo->span);
if(decor != LV_TEXT_DECOR_NONE) {
lv_draw_line_dsc_t line_dsc;
lv_draw_line_dsc_init(&line_dsc);
line_dsc.color = label_draw_dsc.color;
line_dsc.width = label_draw_dsc.font->underline_thickness ? pinfo->font->underline_thickness : 1;
line_dsc.opa = label_draw_dsc.opa;
line_dsc.blend_mode = label_draw_dsc.blend_mode;
if(decor & LV_TEXT_DECOR_STRIKETHROUGH) {
lv_point_t p1;
lv_point_t p2;
p1.x = txt_pos.x;
p1.y = pos.y + ((pinfo->line_h - line_space) >> 1) + (line_dsc.width >> 1);
p2.x = pos.x;
p2.y = p1.y;
lv_draw_line(draw_ctx, &line_dsc, &p1, &p2);
}
if(decor & LV_TEXT_DECOR_UNDERLINE) {
lv_point_t p1;
lv_point_t p2;
p1.x = txt_pos.x;
p1.y = pos.y + pinfo->line_h - line_space - pinfo->font->base_line - pinfo->font->underline_position;
p2.x = pos.x;
p2.y = p1.y;
lv_draw_line(draw_ctx, &line_dsc, &p1, &p2);
}
}
txt_pos.x = pos.x;
}
Next_line_init:
/* next line init */
is_first_line = false;
txt_pos.x = coords.x1;
txt_pos.y += max_line_h;
if(is_end_line || txt_pos.y > clip_area.y2 + 1) {
draw_ctx->clip_area = clip_area_ori;
return;
}
max_w = max_width;
}
draw_ctx->clip_area = clip_area_ori;
}
static void refresh_self_size(lv_obj_t * obj)
{
lv_spangroup_t * spans = (lv_spangroup_t *)obj;
spans->refresh = 1;
lv_obj_refresh_self_size(obj);
lv_obj_invalidate(obj);
}
#endif