94 lines
3.8 KiB
C++
94 lines
3.8 KiB
C++
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/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "binary_format.h"
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#include "defines.h"
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#include "digraph_utils.h"
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namespace latinime {
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const DigraphUtils::digraph_t DigraphUtils::GERMAN_UMLAUT_DIGRAPHS[] =
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{ { 'a', 'e', 0x00E4 }, // U+00E4 : LATIN SMALL LETTER A WITH DIAERESIS
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{ 'o', 'e', 0x00F6 }, // U+00F6 : LATIN SMALL LETTER O WITH DIAERESIS
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{ 'u', 'e', 0x00FC } }; // U+00FC : LATIN SMALL LETTER U WITH DIAERESIS
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const DigraphUtils::digraph_t DigraphUtils::FRENCH_LIGATURES_DIGRAPHS[] =
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{ { 'a', 'e', 0x00E6 }, // U+00E6 : LATIN SMALL LETTER AE
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{ 'o', 'e', 0x0153 } }; // U+0153 : LATIN SMALL LIGATURE OE
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/* static */ bool DigraphUtils::hasDigraphForCodePoint(
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const int dictFlags, const int compositeGlyphCodePoint) {
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if (DigraphUtils::getDigraphForCodePoint(dictFlags, compositeGlyphCodePoint)) {
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return true;
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}
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return false;
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}
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// Retrieves the set of all digraphs associated with the given dictionary.
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// Returns the size of the digraph array, or 0 if none exist.
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/* static */ int DigraphUtils::getAllDigraphsForDictionaryAndReturnSize(
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const int dictFlags, const DigraphUtils::digraph_t **digraphs) {
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if (BinaryFormat::REQUIRES_GERMAN_UMLAUT_PROCESSING & dictFlags) {
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*digraphs = DigraphUtils::GERMAN_UMLAUT_DIGRAPHS;
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return NELEMS(DigraphUtils::GERMAN_UMLAUT_DIGRAPHS);
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}
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if (BinaryFormat::REQUIRES_FRENCH_LIGATURES_PROCESSING & dictFlags) {
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*digraphs = DigraphUtils::FRENCH_LIGATURES_DIGRAPHS;
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return NELEMS(DigraphUtils::FRENCH_LIGATURES_DIGRAPHS);
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}
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return 0;
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}
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// Returns the digraph codepoint for the given composite glyph codepoint and digraph codepoint index
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// (which specifies the first or second codepoint in the digraph).
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/* static */ int DigraphUtils::getDigraphCodePointForIndex(const int dictFlags,
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const int compositeGlyphCodePoint, const DigraphCodePointIndex digraphCodePointIndex) {
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if (digraphCodePointIndex == NOT_A_DIGRAPH_INDEX) {
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return NOT_A_CODE_POINT;
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}
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const DigraphUtils::digraph_t *digraph =
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DigraphUtils::getDigraphForCodePoint(dictFlags, compositeGlyphCodePoint);
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if (!digraph) {
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return NOT_A_CODE_POINT;
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}
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if (digraphCodePointIndex == FIRST_DIGRAPH_CODEPOINT) {
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return digraph->first;
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} else if (digraphCodePointIndex == SECOND_DIGRAPH_CODEPOINT) {
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return digraph->second;
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}
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ASSERT(false);
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return NOT_A_CODE_POINT;
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}
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/**
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* Returns the digraph for the input composite glyph codepoint, or 0 if none exists.
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* dictFlags: the dictionary flags needed to determine which digraphs are supported.
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* compositeGlyphCodePoint: the method returns the digraph corresponding to this codepoint.
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*/
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/* static */ const DigraphUtils::digraph_t *DigraphUtils::getDigraphForCodePoint(
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const int dictFlags, const int compositeGlyphCodePoint) {
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const DigraphUtils::digraph_t *digraphs = 0;
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const int digraphsSize =
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DigraphUtils::getAllDigraphsForDictionaryAndReturnSize(dictFlags, &digraphs);
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for (int i = 0; i < digraphsSize; i++) {
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if (digraphs[i].compositeGlyph == compositeGlyphCodePoint) {
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return &digraphs[i];
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}
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}
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return 0;
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}
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} // namespace latinime
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