111 lines
4.3 KiB
C++
111 lines
4.3 KiB
C++
/*************************************************************************/
|
|
/* script_iterator.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
#include "script_iterator.h"
|
|
|
|
bool ScriptIterator::same_script(int32_t p_script_one, int32_t p_script_two) {
|
|
return p_script_one <= USCRIPT_INHERITED || p_script_two <= USCRIPT_INHERITED || p_script_one == p_script_two;
|
|
}
|
|
|
|
ScriptIterator::ScriptIterator(const String &p_string, int p_start, int p_length) {
|
|
struct ParenStackEntry {
|
|
int pair_index;
|
|
UScriptCode script_code;
|
|
};
|
|
|
|
if (p_start >= p_length) {
|
|
p_start = p_length - 1;
|
|
}
|
|
|
|
if (p_start < 0) {
|
|
p_start = 0;
|
|
}
|
|
|
|
ParenStackEntry paren_stack[128];
|
|
|
|
int script_start;
|
|
int script_end = p_start;
|
|
UScriptCode script_code;
|
|
int paren_sp = -1;
|
|
int start_sp = paren_sp;
|
|
UErrorCode err = U_ZERO_ERROR;
|
|
const char32_t *str = p_string.ptr();
|
|
|
|
do {
|
|
script_code = USCRIPT_COMMON;
|
|
for (script_start = script_end; script_end < p_length; script_end++) {
|
|
UChar32 ch = str[script_end];
|
|
UScriptCode sc = uscript_getScript(ch, &err);
|
|
if (U_FAILURE(err)) {
|
|
ERR_FAIL_MSG(u_errorName(err));
|
|
}
|
|
if (u_getIntPropertyValue(ch, UCHAR_BIDI_PAIRED_BRACKET_TYPE) != U_BPT_NONE) {
|
|
if (u_getIntPropertyValue(ch, UCHAR_BIDI_PAIRED_BRACKET_TYPE) == U_BPT_OPEN) {
|
|
paren_stack[++paren_sp].pair_index = ch;
|
|
paren_stack[paren_sp].script_code = script_code;
|
|
} else if (paren_sp >= 0) {
|
|
UChar32 paired_ch = u_getBidiPairedBracket(ch);
|
|
while (paren_sp >= 0 && paren_stack[paren_sp].pair_index != paired_ch) {
|
|
paren_sp -= 1;
|
|
}
|
|
if (paren_sp < start_sp)
|
|
start_sp = paren_sp;
|
|
if (paren_sp >= 0)
|
|
sc = paren_stack[paren_sp].script_code;
|
|
}
|
|
}
|
|
|
|
if (same_script(script_code, sc)) {
|
|
if (script_code <= USCRIPT_INHERITED && sc > USCRIPT_INHERITED) {
|
|
script_code = sc;
|
|
while (start_sp < paren_sp) {
|
|
paren_stack[++start_sp].script_code = script_code;
|
|
}
|
|
}
|
|
if ((u_getIntPropertyValue(ch, UCHAR_BIDI_PAIRED_BRACKET_TYPE) == U_BPT_CLOSE) && paren_sp >= 0) {
|
|
paren_sp -= 1;
|
|
if (start_sp >= 0) {
|
|
start_sp -= 1;
|
|
}
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
ScriptRange rng;
|
|
rng.script = hb_icu_script_to_script(script_code);
|
|
rng.start = script_start;
|
|
rng.end = script_end;
|
|
|
|
script_ranges.push_back(rng);
|
|
} while (script_end < p_length);
|
|
}
|