/* ******************************************************************************* * * Copyright (c) 1995-2013 International Business Machines Corporation and others * * All rights reserved. * * 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, and/or sell copies of the * Software, and to permit persons to whom the Software is furnished to do so, * provided that the above copyright notice(s) and this permission notice appear * in all copies of the Software and that both the above copyright notice(s) and * this permission notice appear in supporting documentation. * * 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 OF THIRD PARTY RIGHTS. IN * NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE BE * LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * Except as contained in this notice, the name of a copyright holder shall not be * used in advertising or otherwise to promote the sale, use or other dealings in * this Software without prior written authorization of the copyright holder. * ******************************************************************************* * file name: scrptrun.cpp * * created on: 10/17/2001 * created by: Eric R. Mader */ /** * This file is largely copied from the ICU project, * under folder source/extra/scrptrun/scrptrun.cpp */ #include #include #include #include #include #include #include namespace { struct PairIndices { int8_t ma00[0xff]; int8_t ma20[0x7f]; int8_t ma30[0x7f]; PairIndices() { std::fill_n(ma00, 0xff, -1); std::fill_n(ma20, 0x7f, -1); std::fill_n(ma30, 0x7f, -1); // characters in the range 0x0000 - 0x007e (inclusive) // ascii paired punctuation ma00[0x28] = 0; ma00[0x29] = 1; ma00[0x3c] = 2; ma00[0x3e] = 3; ma00[0x5b] = 4; ma00[0x5d] = 5; ma00[0x7b] = 6; ma00[0x7d] = 7; // guillemets ma00[0xab] = 8; ma00[0xbb] = 9; // characters in the range 0x2000 - 0x207e (inclusive) // general punctuation ma20[0x18] = 10; ma20[0x19] = 11; ma20[0x1c] = 12; ma20[0x1d] = 13; ma20[0x39] = 14; ma20[0x3a] = 15; // characters in the range 0x3000 - 0x307e (inclusive) // chinese paired punctuation ma30[0x08] = 16; ma30[0x09] = 17; ma30[0x0a] = 18; ma30[0x0b] = 19; ma30[0x0c] = 20; ma30[0x0d] = 21; ma30[0x0e] = 22; ma30[0x0f] = 23; ma30[0x10] = 24; ma30[0x11] = 25; ma30[0x14] = 26; ma30[0x15] = 27; ma30[0x16] = 28; ma30[0x17] = 29; ma30[0x18] = 30; ma30[0x19] = 31; ma30[0x1a] = 32; ma30[0x1b] = 33; } int32_t getPairIndex(UChar32 ch) const { if (ch < 0xff) return ma00[ch]; if (ch >= 0x2000 && ch < 0x207f) return ma20[ch - 0x2000]; if (ch >= 0x3000 && ch < 0x307f) return ma30[ch - 0x3000]; return -1; } }; UScriptCode getScript(UChar32 ch, UErrorCode* status) { // tdf#154549 // Make combining marks inherit the script of their bases, regardless of // their own script. if (u_getIntPropertyValue(ch, UCHAR_GENERAL_CATEGORY) == U_NON_SPACING_MARK) return USCRIPT_INHERITED; UScriptCode script = uscript_getScript(ch, status); if (U_FAILURE(*status)) return script; // There are three Unicode script codes for Japanese text, but only one // OpenType script tag, so we want to keep them in one run as splitting is // pointless for the purpose of OpenType shaping. if (script == USCRIPT_KATAKANA || script == USCRIPT_KATAKANA_OR_HIRAGANA) return USCRIPT_HIRAGANA; return script; } } const PairIndices gPairIndices; namespace vcl { const char ScriptRun::fgClassID=0; static bool sameScript(int32_t scriptOne, int32_t scriptTwo) { return scriptOne <= USCRIPT_INHERITED || scriptTwo <= USCRIPT_INHERITED || scriptOne == scriptTwo; } UBool ScriptRun::next() { int32_t startSP = parenSP; // used to find the first new open character UErrorCode error = U_ZERO_ERROR; // if we've fallen off the end of the text, we're done if (scriptEnd >= charLimit) { return false; } scriptCode = USCRIPT_COMMON; for (scriptStart = scriptEnd; scriptEnd < charLimit; scriptEnd += 1) { UChar high = charArray[scriptEnd]; UChar32 ch = high; // if the character is a high surrogate and it's not the last one // in the text, see if it's followed by a low surrogate if (rtl::isHighSurrogate(high) && scriptEnd < charLimit - 1) { UChar low = charArray[scriptEnd + 1]; // if it is followed by a low surrogate, // consume it and form the full character if (rtl::isLowSurrogate(low)) { ch = rtl::combineSurrogates(high, low); scriptEnd += 1; } } UScriptCode sc = getScript(ch, &error); int32_t pairIndex = gPairIndices.getPairIndex(ch); // Paired character handling: // if it's an open character, push it onto the stack. // if it's a close character, find the matching open on the // stack, and use that script code. Any non-matching open // characters above it on the stack will be popped. if (pairIndex >= 0) { if ((pairIndex & 1) == 0) { ++parenSP; int32_t nVecSize = parenStack.size(); if (parenSP == nVecSize) parenStack.resize(nVecSize + 128); parenStack[parenSP].pairIndex = pairIndex; parenStack[parenSP].scriptCode = scriptCode; } else if (parenSP >= 0) { int32_t pi = pairIndex & ~1; while (parenSP >= 0 && parenStack[parenSP].pairIndex != pi) { parenSP -= 1; } if (parenSP < startSP) { startSP = parenSP; } if (parenSP >= 0) { sc = parenStack[parenSP].scriptCode; } } } if (sameScript(scriptCode, sc)) { if (scriptCode <= USCRIPT_INHERITED && sc > USCRIPT_INHERITED) { scriptCode = sc; // now that we have a final script code, fix any open // characters we pushed before we knew the script code. while (startSP < parenSP) { parenStack[++startSP].scriptCode = scriptCode; } } // if this character is a close paired character, // pop it from the stack if (pairIndex >= 0 && (pairIndex & 1) != 0 && parenSP >= 0) { parenSP -= 1; /* decrement startSP only if it is >= 0, decrementing it unnecessarily will lead to memory corruption while processing the above while block. e.g. startSP = -4 , parenSP = -1 */ if (startSP >= 0) { startSP -= 1; } } } else { // if the run broke on a surrogate pair, // end it before the high surrogate if (ch >= 0x10000) { scriptEnd -= 1; } break; } } return true; } } lue='distro/suse/suse-3.6.3'>distro/suse/suse-3.6.3 LibreOffice 核心代码仓库文档基金会
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