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LibVT: Add incremental UTF-8 parsing to the terminal input handler

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Instead of relying on the GUI code to handle UTF-8, we now process
and parse the incoming data into 32-bit codepoints ourselves.

This means that you can now show emojis in the terminal and they will
only take up one character cell each. :^)
This commit is contained in:
Andreas Kling 2020-05-16 19:47:49 +02:00
parent 06f3eb0ecd
commit b8498dc55e
2 changed files with 70 additions and 14 deletions
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10
Libraries/LibVT/Terminal.h
View file

@ -101,6 +101,8 @@ public:
private:
typedef Vector<unsigned, 4> ParamVector;
void on_codepoint(u32);
void scroll_up();
void scroll_down();
void newline();
@ -171,7 +173,7 @@ private:
void execute_xterm_command();
void execute_hashtag(u8);
enum EscapeState {
enum ParserState {
Normal,
GotEscape,
ExpectParameter,
@ -180,9 +182,13 @@ private:
ExpectHashtagDigit,
ExpectXtermParameter,
ExpectStringTerminator,
UTF8Needs3Bytes,
UTF8Needs2Bytes,
UTF8Needs1Byte,
};
EscapeState m_parser_state { Normal };
ParserState m_parser_state { Normal };
u32 m_parser_codepoint { 0 };
Vector<u8> m_parameters;
Vector<u8> m_intermediates;
Vector<u8> m_xterm_parameters;