UTF-8 language translation support

[thinkyhead]

Rebuild of #4704 by @yhfudev

Please review and test.

The last commit is a set of incomplete and uncertain changes. Some of them may actually be reversions of the code to the earlier point where #4704 was created. We need to sort that out.

[yhfudev]

@thinkyhead
There're two issues:

1. the function defined in file ultralcd_impl_HD44780.h is missing, maybe you need to merge the branch RCBugFix?

lcd_implementation_drawmenu_setting_edit_callback_float62

2. patch:

diff --git a/Marlin/ultralcd_impl_DOGM.h b/Marlin/ultralcd_impl_DOGM.h
index c6a97ec..b8e955f 100644
--- a/Marlin/ultralcd_impl_DOGM.h
+++ b/Marlin/ultralcd_impl_DOGM.h
@@ -572,7 +572,7 @@ static void lcd_implementation_status_screen() {
   if (PAGE_CONTAINS(51 - INFO_FONT_HEIGHT, 49)) {
     lcd_setFont(FONT_MENU);
     lcd_moveto(3, 50);
-    lcd_print(LCD_STR_FEEDRATE[0]);
+    lcd_print_u(LCD_STR_FEEDRATE[0]);
 
     lcd_setFont(FONT_STATUSMENU);
     lcd_moveto(12, 50);

[yhfudev]

The language_data_*.h files are similar to the files dogm_font_data_ISO10646_*.h, I suggest not to delete it even it can be generated from the font data. It is for the user to compile the firmware.

[thinkyhead]

lcd_implementation_drawmenu_setting_edit_callback_float62

Ah yes, I forgot about some of those reversions. Thanks for pointing that out.

I suggest not to delete it even it can be generated from the font data. It is for the user to compile the firmware.

Do we need to re-generate these files? If so, we should re-generate them and replace the ones here with the newer generated files.

[thinkyhead]

Are we going to keep language_cn.h, or is it completely replaced by the two new Chinese language files?

[yhfudev]

The language_cn.h is for Simplified Chinese only, it was replaced by new files language_zh_CN.h and language_zh_TW.h for Simplified Chinese and Traditional Chinese.

You may leave the language_data_*.h as it and we can re-generate it later once we have this PR done.

[thinkyhead]

Finally compiling. Can you give it a test on your display and see if it's good?
https://github.com/thinkyhead/Marlin/archive/rc_utf8_diff.zip

[yhfudev]

@thinkyhead
I tested your package, and the display still have problem.

I also merged the latest changes from Marin to my branch: https://github.com/yhfudev/Marlin.git
and my version works. Here's the differences between https://github.com/thinkyhead/Marlin/archive/rc_utf8_diff.zip and https://github.com/yhfudev/Marlin.git

thinkyheadutf8.diff.zip

[yhfudev]

The following may fix the arrow problem:

diff --git a/Marlin/ultralcd_impl_DOGM.h b/Marlin/ultralcd_impl_DOGM.h
index d14d24f..58ae728 100644
--- a/Marlin/ultralcd_impl_DOGM.h
+++ b/Marlin/ultralcd_impl_DOGM.h
@@ -657,7 +657,7 @@ static void lcd_implementation_status_screen() {
     if (!PAGE_CONTAINS(row_y1, row_y2)) return;
 
     lcd_printstr_P(pstr, (LCD_WIDTH - (START_COL) - 2) * DOG_CHAR_WIDTH);
-    lcd_moveto(LCD_PIXEL_WIDTH - (DOG_CHAR_WIDTH), (row + 1) * (DOG_CHAR_HEIGHT));
+    lcd_moveto(LCD_PIXEL_WIDTH - (DOG_CHAR_WIDTH), row_y2);
 
     lcd_print_u(post_char);
     lcd_print_u(' ');
@@ -679,7 +679,7 @@ static void lcd_implementation_status_screen() {
     const uint8_t vallen = (pgm ? lcd_strlen_P(data) : (lcd_strlen((char*)data)));
 
     lcd_printstr_P(pstr, (LCD_WIDTH - (START_COL) - 2 - vallen) * DOG_CHAR_WIDTH);
-    lcd_moveto(LCD_PIXEL_WIDTH - (DOG_CHAR_WIDTH) * vallen, (row + 1) * (DOG_CHAR_HEIGHT));
+    lcd_moveto(LCD_PIXEL_WIDTH - (DOG_CHAR_WIDTH) * vallen, row_y2);
 
     pgm ? lcd_printPGM(data) : lcd_print((char*)data);
   }

[thinkyhead]

@yhfudev Feel free to compare and contribute a patch to my branch, if you catch the cause for mis-alignment of the right-side icons.

[yhfudev]

What about other commits of the "Update to the current version and also code improvements. thinkyhead#18"?

[thinkyhead]

What about other commits of the "Update to the current version and also code improvements. thinkyhead#18"?

They have all been applied as "fixups" to previous commits using git rebase -i.

[yhfudev]

Oh, I see.