libretro/scummvm
1
0
Fork 0
mirror of https://github.com/libretro/scummvm.git synced 2024-12-12 03:56:20 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

COMMON: Introduce BiDi paragraph direction types

Browse Source
This commit is contained in:
lb_ii 2021-06-18 03:23:07 +03:00 committed by lolbot-iichan
parent 9cd8bbafa9
commit dce92c8e41
2 changed files with 37 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
common/unicode-bidi.cpp
View File

@ -26,17 +26,25 @@
#ifdef USE_FRIBIDI
#include <fribidi/fribidi.h>
#else
/* This constant is used below in common code
* fake it here to lighten code
*/
#define FRIBIDI_PAR_ON 0
#endif
namespace Common {
UnicodeBiDiText::UnicodeBiDiText(const Common::U32String &str) :
logical(str), _pbase_dir(FRIBIDI_PAR_ON),
uint32 GetFriBiDiParType(BiDiParagraph dir) {
#ifdef USE_FRIBIDI
if (dir == BIDI_PAR_ON) {
return FRIBIDI_PAR_ON;
} else if (dir == BIDI_PAR_RTL) {
return FRIBIDI_PAR_RTL;
} else if (dir == BIDI_PAR_LTR) {
return FRIBIDI_PAR_LTR;
}
#endif
return 0;
}
UnicodeBiDiText::UnicodeBiDiText(const Common::U32String &str, BiDiParagraph dir) :
logical(str), _pbase_dir(GetFriBiDiParType(dir)),
_log_to_vis_index(NULL), _vis_to_log_index(NULL) {
initWithU32String(str);
}
@ -118,24 +126,24 @@ Common::String bidiByLineHelper(Common::String line, va_list args) {
return UnicodeBiDiText(line, page, pbase_dir).visual.encode(page);
}
String convertBiDiStringByLines(const String &input, const Common::CodePage page) {
uint32 pbase_dir = FRIBIDI_PAR_ON;
String convertBiDiStringByLines(const String &input, const Common::CodePage page, BiDiParagraph dir) {
uint32 pbase_dir = GetFriBiDiParType(dir);
return input.forEachLine(bidiByLineHelper, page, &pbase_dir);
}
String convertBiDiString(const String &input, const Common::Language lang) {
String convertBiDiString(const String &input, const Common::Language lang, BiDiParagraph dir) {
if (lang != Common::HE_ISR) //TODO: modify when we'll support other RTL languages, such as Arabic and Farsi
return input;
return Common::convertBiDiString(input, kWindows1255);
return Common::convertBiDiString(input, kWindows1255, dir);
}
String convertBiDiString(const String &input, const Common::CodePage page) {
return convertBiDiU32String(input.decode(page)).visual.encode(page);
String convertBiDiString(const String &input, const Common::CodePage page, BiDiParagraph dir) {
return convertBiDiU32String(input.decode(page), dir).visual.encode(page);
}
UnicodeBiDiText convertBiDiU32String(const U32String &input) {
return UnicodeBiDiText(input);
UnicodeBiDiText convertBiDiU32String(const U32String &input, BiDiParagraph dir) {
return UnicodeBiDiText(input, dir);
}
} // End of namespace Common

19
common/unicode-bidi.h
View File

@ -29,6 +29,15 @@
namespace Common {
/**
* List of paragraph directions
*/
enum BiDiParagraph {
BIDI_PAR_ON = 0,
BIDI_PAR_RTL = 1,
BIDI_PAR_LTR = 2
};
class UnicodeBiDiText {
private:
uint32 *_log_to_vis_index; // from fribidi conversion
@ -40,7 +49,7 @@ public:
Common::U32String visual; // from fribidi conversion, ordered visually
uint32 _pbase_dir;
UnicodeBiDiText(const Common::U32String &str);
UnicodeBiDiText(const Common::U32String &str, BiDiParagraph dir = BIDI_PAR_ON);
/* This constructor shouldn't be used outside of unicode-bidi.cpp file */
UnicodeBiDiText(const Common::String &str, const Common::CodePage page, uint32 *pbase_dir);
~UnicodeBiDiText();
@ -56,12 +65,12 @@ public:
};
/* just call the constructor for convenience */
UnicodeBiDiText convertBiDiU32String(const U32String &input);
String convertBiDiString(const String &input, const Common::Language lang);
String convertBiDiString(const String &input, const Common::CodePage page);
UnicodeBiDiText convertBiDiU32String(const U32String &input, BiDiParagraph dir = BIDI_PAR_ON);
String convertBiDiString(const String &input, const Common::Language lang, BiDiParagraph dir = BIDI_PAR_ON);
String convertBiDiString(const String &input, const Common::CodePage page, BiDiParagraph dir = BIDI_PAR_ON);
// calls convertBiDiString for each line in isolation
String convertBiDiStringByLines(const String &input, const Common::CodePage page);
String convertBiDiStringByLines(const String &input, const Common::CodePage page, BiDiParagraph dir = BIDI_PAR_ON);
} // End of namespace Common