feat(ime_pinyin): add API to use Pinyin IME(Chinese input) (#3408)

* feat(pinyin_ime): add API to use Pinyin IME(Chinese input)

1.Low resource usage
2.Support custom thesaurus
3.Support custom styles (Candidate panel, keyboard)
4.Support simple spelling

* fix(ime_pinyin): fix several problems of ime_pinyin

1. Change lv_pinyin_ime to lv_ime_pinyin
2. Add lv_pinyin_ime_set_keyboard interface
3. Add lv_ime_pinyin configuration in Kconfig, src/lv_conf_internal.h

* refactor(ime_pinyin): improve coding specification

* feat(ime_pinyin): add simple Pinyin IME example

* docs(ime_pinyin): Add ime_pinyin documentation

* Delete settings.json

* Update dictionary based on simsun

* Delete lv_font_source_han_sans_normal_16.c

* Update lv_example_ime_pinyin_1.c

* Update ime_pinyin.md

add Chinese translation document

* Update lv_ime_pinyin.c

* Update lv_ime_pinyin.c

* Update lv_ime_pinyin.h

* Update lv_ime_pinyin.c

* Update lv_example_ime_pinyin_1.c

* Update lv_conf_internal.h

* Update lv_ime_pinyin.c

* Update lv_ime_pinyin.c

Co-authored-by: 100askTeam <team100ask@outlook.com>

examples/others/ime/index.rst

@@ -0,0 +1,8 @@
+
+Simple Pinyin IME example 
+"""""""""""""""""""
+
+.. lv_example:: others/ime/lv_example_ime_pinyin_1
+  :language: c
+
+

examples/others/ime/lv_example_ime_pinyin.h

@@ -0,0 +1,38 @@
+/**
+ * @file lv_example_ime_pinyin.h
+ *
+ */
+
+#ifndef LV_EX_IME_PINYIN_H
+#define LV_EX_IME_PINYIN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+void lv_example_ime_pinyin_1(void);
+
+/**********************
+ *      MACROS
+ **********************/
+
+#ifdef __cplusplus
+} /*extern "C"*/
+#endif
+
+#endif /*LV_EX_IME_PINYIN_H*/

examples/others/ime/lv_example_ime_pinyin_1.c

@@ -0,0 +1,56 @@
+#include "../../lv_examples.h"
+#if LV_USE_LABEL && LV_USE_TEXTAREA && LV_FONT_SIMSUN_16_CJK  && LV_USE_IME_PINYIN && LV_BUILD_EXAMPLES
+
+static void ta_event_cb(lv_event_t * e)
+{
+    lv_event_code_t code = lv_event_get_code(e);
+    lv_obj_t * ta = lv_event_get_target(e);
+    lv_obj_t * kb = lv_event_get_user_data(e);
+
+    if(code == LV_EVENT_FOCUSED) {
+        if(lv_indev_get_type(lv_indev_get_act()) != LV_INDEV_TYPE_KEYPAD) {
+            lv_keyboard_set_textarea(kb, ta);
+            lv_obj_clear_flag(kb, LV_OBJ_FLAG_HIDDEN);
+        }
+    }
+    else if(code == LV_EVENT_READY || code == LV_EVENT_CANCEL) {
+        lv_obj_add_flag(kb, LV_OBJ_FLAG_HIDDEN);
+        lv_obj_clear_state(ta, LV_STATE_FOCUSED);
+        lv_indev_reset(NULL, ta);   /*To forget the last clicked object to make it focusable again*/
+    }
+}
+
+void lv_example_ime_pinyin_1(void)
+{
+    lv_obj_t * pinyin_ime = lv_ime_pinyin_create(lv_scr_act());
+    lv_obj_set_style_text_font(pinyin_ime, &lv_font_simsun_16_cjk, 0);
+    //lv_ime_pinyin_set_dict(pinyin_ime, your_dict); // Use a custom dictionary. If it is not set, the built-in thesaurus will be used.
+
+    lv_obj_t * kb = lv_keyboard_create(lv_scr_act());
+    lv_ime_pinyin_set_keyboard(pinyin_ime, kb);
+
+    /* ta1 */
+    lv_obj_t * ta1 = lv_textarea_create(lv_scr_act());
+    lv_obj_set_style_text_font(ta1, &lv_font_simsun_16_cjk, 0);
+    lv_obj_align(ta1, LV_ALIGN_TOP_LEFT, 10, 10);
+
+    lv_keyboard_set_textarea(kb, ta1);
+
+    lv_obj_add_event_cb(ta1, ta_event_cb, LV_EVENT_ALL, kb);
+
+    /* ta2 */
+    lv_obj_t * ta2 = lv_textarea_create(lv_scr_act());
+    lv_obj_set_style_text_font(ta2, &lv_font_simsun_16_cjk, 0);
+    lv_obj_align_to(ta2, ta1, LV_ALIGN_OUT_RIGHT_MID, 10, 0);
+
+    lv_obj_add_event_cb(ta2, ta_event_cb, LV_EVENT_ALL, kb);
+
+    lv_obj_t * cz_label = lv_label_create(lv_scr_act());
+    lv_label_set_text(cz_label,
+                      "嵌入式系统（Embedded System），\n是一种嵌入机械或电气系统内部、具有专一功能和实时计算性能的计算机系统。");
+    lv_obj_set_style_text_font(cz_label, &lv_font_simsun_16_cjk, 0);
+    lv_obj_set_width(cz_label, 310);
+    lv_obj_align_to(cz_label, ta1, LV_ALIGN_OUT_BOTTOM_LEFT, 5, 5);
+}
+
+#endif

examples/others/lv_example_others.h

@@ -19,6 +19,7 @@ extern "C" {
 #include "fragment/lv_example_fragment.h"
 #include "imgfont/lv_example_imgfont.h"
 #include "msg/lv_example_msg.h"
+#include "ime/lv_example_ime_pinyin.h"
 
 /*********************
  *      DEFINES