63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
/*
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* %W% %E%
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*
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* (C) Copyright IBM Corp. 2001 - All Rights Reserved
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*
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*/
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#include "layout/LETypes.h"
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#include "layout/LEScripts.h"
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#include "unicode/uscript.h"
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#include "scrptrun.h"
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le_bool ScriptRun::sameScript(le_int32 scriptOne, le_int32 scriptTwo)
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{
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return scriptOne <= qaaiScriptCode || scriptTwo <= qaaiScriptCode || scriptOne == scriptTwo;
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}
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le_bool ScriptRun::next()
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{
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UErrorCode error = U_ZERO_ERROR;
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if (scriptEnd >= charLimit) {
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return false;
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}
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scriptCode = zyyyScriptCode;
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for (scriptStart = scriptEnd; scriptEnd < charLimit; scriptEnd += 1) {
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LEUnicode16 high = charArray[scriptEnd];
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LEUnicode32 ch = high;
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if (scriptEnd < charLimit - 1 && high >= 0xD800 && high <= 0xDBFF)
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{
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LEUnicode16 low = charArray[scriptEnd + 1];
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if (low >= 0xDC00 && low <= 0xDFFF) {
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ch = (high - 0xD800) * 0x0400 + low - 0xDC00 + 0x10000;
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scriptEnd += 1;
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}
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}
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le_int32 sc = uscript_getScript(ch, &error);
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if (sameScript(scriptCode, sc)) {
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if (scriptCode <= qaaiScriptCode && sc > qaaiScriptCode) {
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scriptCode = sc;
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}
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} else {
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// if the run broke on a surrogate pair,
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// end it before the high surrogate
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if (ch >= 0x10000) {
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scriptEnd -= 1;
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}
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break;
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}
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}
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return true;
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}
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