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// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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/**
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@file
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@internalComponent
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*/
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#include "FontIndic.h"
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#include <gdi.h>
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#include "GlyphSel.h"
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#include "ShapeInfo.h"
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#include "gdiinline.inl"
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// State machine for determining syllable boundaries.
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// Key: D = Dependent vowel. V = Virama. N = Nukta
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// I = Independent Vowel. S = Candrabindu/Anusvara/Visarga
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// C = Consonant. J = zero-width joiner. X = Other
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// A = Addak (double the following constant)
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enum TSyllableState
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{
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EReject = -1,
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// Begin + I: add and move to IndependentVowel
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// Begin + C: add and move to Consonant
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// Begin + V/N/D/S/J/X: add and close syllable
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EBegin = 0,
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// Consonant + D: add and move to ConsonantVowel
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// Consonant + N: add
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// Consonant + V: add and move to Virama
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// Consonant + S: add and close syllable
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// Consonant + C/I/J/X: close syllable
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EConsonant = 1,
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// Consonant2 + D: add and move to ConsonantVowel
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// Consonant2 + N: add
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// Consonant2 + V: add and move to Virama2
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// Consonant2 + S: add and close syllable
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// Consonant2 + C/I/J/X: close syllable
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EConsonant2 = 2,
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// Consonant3 + D: add and move to ConsonantVowel
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// Consonant3 + N: add
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// Consonant3 + V: add and move to Virama3
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// Consonant3 + S: add and close syllable
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// Consonant3 + C/I/J/X: close syllable
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EConsonant3 = 3,
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// Consonant + D: add and move to ConsonantVowel
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// Consonant + N: add
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// Consonant + V: add and close syllable
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// Consonant + S: add and close syllable
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// Consonant + C/I/J/X: close syllable
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EConsonant4 = 4,
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// IndependentVowel + S: add
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// IndependentVowel + D/V/N/I/C/J/X: close syllable
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EIndependentVowel = 5,
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// Virama + C: add and move to Consonant
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// Virama + J: add and close syllable
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sl@0
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// Virama + N/V/D/I/S/X: close syllable
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sl@0
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EVirama = 6,
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// Virama2 + C: add and move to Consonant3
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// Virama2 + J: add and close syllable
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sl@0
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// Virama2 + N/V/D/I/S/X: close syllable
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sl@0
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EVirama2 = 7,
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// Virama3 + C: add and move to Consonant4
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// Virama3 + J: add and close syllable
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sl@0
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// Virama3 + N/V/D/I/S/X: close syllable
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EVirama3 = 8,
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// Virama4 + J: add and close syllable
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sl@0
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// Virama4 + CN/V/D/I/S/X: close syllable
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EVirama4 = 9,
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// ConsonantVowel + S: add
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// ConsonantVowel + D/V/N/I/C/J/X: close syllable
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EConsonantVowel = 10,
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// NuktaConsonant + D/V: add
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// NuktaConsonant + S/N/I/C/J/X: close syllable
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ENuktaConsonant = 11,
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// NuktaConsonant + D/V: add
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// NuktaConsonant + S/N/I/C/J/X: close syllable
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ENuktaConsonant2 = 12,
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// NuktaConsonant + D/V: add
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// NuktaConsonant + S/N/I/C/J/X: close syllable
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ENuktaConsonant3 = 13,
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// NuktaConsonant + D: add
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// NuktaConsonant + V/S/N/I/C/J/X: close syllable
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ENuktaConsonant4 = 14,
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// IndependentVowelA + CANDRA E: add
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// IndependentVowelA + anything else: close syllable
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EIndependentVowelA = 15,
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// ZeroWidthJoinerC + V: add
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// ZeroWidthJoinerC + C/S/N/I/J/X/D: close syllable
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EZeroWidthJoinerC = 16,
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// ZeroWidthJoinerA + CANDRA E: add
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// ZeroWidthJoinerA +anything else: close syllable
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EZeroWidthJoinerA = 17,
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// ZeroWidthJoinerV + C/N: add
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// ZeroWidthJoinerV + anything else: close syllable
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EZeroWidthJoinerV = 18,
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// ZeroWidthJoinerV2 + C/N: add
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// ZeroWidthJoinerV2 + anything else: close syllable
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EZeroWidthJoinerV2 = 19,
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// ZeroWidthJoinerV3 + C/N: add
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// ZeroWidthJoinerV3 + anything else: close syllable
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EZeroWidthJoinerV3 =20,
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// EKannadaRa + C/N/V/ZWJ(C): add
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EKannadaRa = 21,
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// ESplitVowel1 + SV2: add and close syllable
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// ESPlitVowel1 + anything else: close syllable
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ESplitVowel1 = 22,
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//EGurBearerA + EIndicCodeGurDependentVowelA: add and move to EIndependentVowel
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//EGurBearerA + modifier: add and close syllable
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//EGurBearerA + anything else: close syllable
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EGurBearerA = 23,
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//EGurBearerU + EIndicCodeGurDependentVowelU: add and move to EIndependentVowel
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//EGurBearerU + anything else: close syllable
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EGurBearerU = 24,
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//EGurBearerI + EIndicCodeGurDependentVowelI: add and move to EIndependentVowel
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//EGurBearerI + anything else: close syllable
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EGurBearerI = 25,
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EConsonantMalaChillu = 26,
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EConsonantMalaChillu2 = 27,
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EConsonantMalaChillu3 = 28,
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EViramaMalaChillu = 29,
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EViramaMalaChillu2 = 30,
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EViramaMalaChillu3 = 31,
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EConsonantMalaChilluNA = 32,
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EConsonantMalaChilluNA2 = 33,
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EConsonantMalaChilluNA3 = 34,
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EViramaMalaChilluNA = 35,
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EViramaMalaChilluNA2 = 36,
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EViramaMalaChilluNA3 = 37,
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EZeroWidthJoinerMalaChilluNA = 38,
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EZeroWidthJoinerMalaChilluNA2 = 39,
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EZeroWidthJoinerMalaChilluNA3 = 40,
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// Add and close acceptances go here.
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EAccept = 41
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};
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/** Defines the transitions for a state machine for determining syllable
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boundaries. The machine starts in state 0. On receiving a character of type t
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while in state s, moves to state KStateResponse[s][t]. */
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const TSyllableState KStateResponse[42][24] =
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{
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// EBegin -- nothing added yet
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{EAccept, EAccept, EIndependentVowel, EConsonant, EAccept, EAccept, EAccept, EAccept, ENuktaConsonant, EIndependentVowelA, EAccept, EKannadaRa, EAccept, EAccept, EAccept, EGurBearerA, EGurBearerU, EGurBearerI, EAccept, EAccept, EAccept, EConsonantMalaChillu,EConsonantMalaChilluNA,EConsonant},
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// EConsonant -- seen a consonant either at the start or after virama
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{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama, ENuktaConsonant, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
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// EConsonant2 -- seen a consonant after virama
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{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama2, ENuktaConsonant2, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
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// EConsonant3 -- seen a consonant after virama2
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{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama3, ENuktaConsonant3, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
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// EConsonant4 -- seen a consonant after virama3
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{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama4, ENuktaConsonant4, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
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// EIndependentVowel -- possibly nasalized. I haven't bothered to distinguish between
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// nasalization and visarga.
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{EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantVowel, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
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// EVirama -- just seen a virama in a legal context. Must be consonant or ZWJ next
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{EReject, EReject, EReject, EConsonant2, EReject, EReject, EReject, EZeroWidthJoinerV, ENuktaConsonant2, EReject, EReject, EConsonant2, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantMalaChillu2,EConsonantMalaChilluNA2,EConsonant2},
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// EVirama2 -- just seen a virama in a legal context. Must be consonant2
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{EReject, EReject, EReject, EConsonant3, EReject, EReject, EReject, EZeroWidthJoinerV2, ENuktaConsonant3, EReject, EReject, EConsonant3, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantMalaChillu3,EConsonantMalaChilluNA3,EConsonant3},
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// EVirama3 -- just seen a virama in a legal context. Must be consonant3
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{EReject, EReject, EReject, EConsonant4, EReject, EReject, EReject, EZeroWidthJoinerV3, ENuktaConsonant4, EReject, EReject, EConsonant4, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonant4,EConsonant4,EConsonant4},
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// EVirama4 -- just seen a virama in a legal context. Must be consonant4
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{EReject, EReject, EReject, EReject, EReject, EReject, EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
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// EConsonantVowel -- Just seen a consonant with matra. Can only nasalize or visarg
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{EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
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// ENuktaConsonant -- Just seen a consonant with Nukta. Can only accept a dependant vowel or a Virama at this stage.
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{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama, EReject, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
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// ENuktaConsonant2 -- Just seen a consonant with Nukta after a virama.
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sl@0
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{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama2, EReject, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
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sl@0
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// ENuktaConsonant3 -- Just seen a consonant with Nukta after Virama2.
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sl@0
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{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama3, EReject, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
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sl@0
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// ENuktaConsonant4 -- Just seen a consonant with Nukta after Virama3.
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sl@0
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{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama4, EReject, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
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sl@0
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// EIndependentVowelA -- Special case Devanagari independent vowel
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sl@0
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{EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EZeroWidthJoinerA, EReject, EReject, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
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sl@0
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// EZeroWidthJoinerC -- Just seen a ZWJ after a consonant
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sl@0
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{EReject, EReject, EReject, EReject, EReject, EVirama, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
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sl@0
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// EZeroWidthJoinerA -- Just seen a ZWJ after the dependent Vowel A
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sl@0
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{EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
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sl@0
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// EZeroWidthJoinerV -- Just seen the ZWJ after the first pair of consonant + virama
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sl@0
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{EReject, EAccept, EReject, EConsonant2, EReject, EReject, EReject, EReject, ENuktaConsonant2, EReject, EReject, EConsonant2, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantMalaChillu2,EConsonantMalaChilluNA2,EConsonant2},
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sl@0
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// EZeroWidthJoinerV2 -- Just seen the ZWJ after consonant + virama + consonant + virama
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sl@0
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194 |
{EReject, EAccept, EReject, EConsonant3, EReject, EReject, EReject, EReject, ENuktaConsonant3, EReject, EReject, EConsonant3, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantMalaChillu3,EConsonantMalaChilluNA3,EConsonant3},
|
|
sl@0
|
195 |
// EZeroWidthJoinerV3 -- Just seen the ZWJ after consonant + virama + consonant + virama + consonant + virama
|
|
sl@0
|
196 |
{EReject, EAccept, EReject, EConsonant4, EReject, EReject, EReject, EReject, ENuktaConsonant4, EReject, EReject, EConsonant4, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonant4,EConsonant4,EConsonant4},
|
|
sl@0
|
197 |
// EKannadaRa -- Special case consonant
|
|
sl@0
|
198 |
{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama, ENuktaConsonant, EZeroWidthJoinerC, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
|
|
sl@0
|
199 |
// ESplitVowel1 -- Just seen a consonant with first part of a split vowel. Can only nasalize, visarg or add second part of splt vowel
|
|
sl@0
|
200 |
{EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
|
|
sl@0
|
201 |
// EGurBearerA -- Just seen a dependent Vowel EIndicCodeGurDependentVowelA and modifier
|
|
sl@0
|
202 |
{EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EIndependentVowel, EReject, EReject, EReject,EReject,EReject},
|
|
sl@0
|
203 |
// EGurBearerU -- Just seen a dependent Vowel EIndicCodeGurDependentVowelU
|
|
sl@0
|
204 |
{EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EIndependentVowel, EReject, EReject,EReject,EReject},
|
|
sl@0
|
205 |
// EGurBearerI -- Just seen a dependent Vowel EIndicCodeGurDependentVowelI
|
|
sl@0
|
206 |
{EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EIndependentVowel, EReject,EReject,EReject},
|
|
sl@0
|
207 |
|
|
sl@0
|
208 |
{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChillu,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
|
|
sl@0
|
209 |
{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChillu2,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
|
|
sl@0
|
210 |
{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChillu3,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
|
|
sl@0
|
211 |
{EReject,EReject,EReject,EConsonant2,EReject,EReject,EReject,EAccept,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonantMalaChillu2,EConsonantMalaChilluNA2,EConsonant2},
|
|
sl@0
|
212 |
{EReject,EReject,EReject,EConsonant3,EReject,EReject,EReject,EAccept,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonantMalaChillu3,EConsonantMalaChilluNA3,EConsonant3},
|
|
sl@0
|
213 |
{EReject,EReject,EReject,EConsonant4,EReject,EReject,EReject,EAccept,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonant4,EConsonant4,EConsonant4},
|
|
sl@0
|
214 |
{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChilluNA,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
|
|
sl@0
|
215 |
{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChilluNA2,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
|
|
sl@0
|
216 |
{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChilluNA3,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
|
|
sl@0
|
217 |
{EReject,EReject,EReject,EConsonant2,EReject,EReject,EReject,EZeroWidthJoinerMalaChilluNA,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonantMalaChillu2,EConsonantMalaChilluNA2,EConsonant2},
|
|
sl@0
|
218 |
{EReject,EReject,EReject,EConsonant3,EReject,EReject,EReject,EZeroWidthJoinerMalaChilluNA2,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonantMalaChillu3,EConsonantMalaChilluNA3,EConsonant3},
|
|
sl@0
|
219 |
{EReject,EReject,EReject,EConsonant4,EReject,EReject,EReject,EZeroWidthJoinerMalaChilluNA3,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonant4,EConsonant4,EConsonant4},
|
|
sl@0
|
220 |
{EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonant2},
|
|
sl@0
|
221 |
{EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonant3},
|
|
sl@0
|
222 |
{EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonant4},
|
|
sl@0
|
223 |
|
|
sl@0
|
224 |
// EAccept -- this one is added but anything further is rejected
|
|
sl@0
|
225 |
{EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject}
|
|
sl@0
|
226 |
};
|
|
sl@0
|
227 |
|
|
sl@0
|
228 |
TIndicCodeType CodeType(TInt aCode, const TIndicCodeMapping aCodeMap[], TInt aMapLen)
|
|
sl@0
|
229 |
{
|
|
sl@0
|
230 |
TInt start = 0;
|
|
sl@0
|
231 |
TInt end = aMapLen - 1;
|
|
sl@0
|
232 |
while (start != end)
|
|
sl@0
|
233 |
{
|
|
sl@0
|
234 |
const TInt mid = (start + end + 1) >> 1;
|
|
sl@0
|
235 |
if (aCodeMap[mid].iFirstCodeInRange <= aCode)
|
|
sl@0
|
236 |
start = mid;
|
|
sl@0
|
237 |
else
|
|
sl@0
|
238 |
end = mid - 1;
|
|
sl@0
|
239 |
}
|
|
sl@0
|
240 |
return static_cast<TIndicCodeType>(aCodeMap[start].iCodeType);
|
|
sl@0
|
241 |
}
|
|
sl@0
|
242 |
|
|
sl@0
|
243 |
const TText16* SyllableEnd(const TText16* aCurrentPosition,
|
|
sl@0
|
244 |
const TText16* aEnd, const TIndicCodeMapping aCodeMap[], TInt aMapLen)
|
|
sl@0
|
245 |
{
|
|
sl@0
|
246 |
TSyllableState state = EBegin;
|
|
sl@0
|
247 |
while (aCurrentPosition != aEnd)
|
|
sl@0
|
248 |
{
|
|
sl@0
|
249 |
const TIndicCodeType ct = CodeType(*aCurrentPosition, aCodeMap, aMapLen);
|
|
sl@0
|
250 |
state = KStateResponse[state][ct];
|
|
sl@0
|
251 |
if (state == EReject)
|
|
sl@0
|
252 |
return aCurrentPosition;
|
|
sl@0
|
253 |
++aCurrentPosition;
|
|
sl@0
|
254 |
}
|
|
sl@0
|
255 |
return aCurrentPosition;
|
|
sl@0
|
256 |
}
|
|
sl@0
|
257 |
|
|
sl@0
|
258 |
/**
|
|
sl@0
|
259 |
Common function for all Indic scripts.
|
|
sl@0
|
260 |
Performs the shaping operation on Indic script text up to KMaxTextToShape.
|
|
sl@0
|
261 |
*/
|
|
sl@0
|
262 |
TInt IndicShapingProcess(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo,
|
|
sl@0
|
263 |
const TIndicCodeMapping aCodeMap[], TInt aMapLen, const TUint aHighChar,
|
|
sl@0
|
264 |
const TUint aLowChar, const TUint32 aScript, const TUint32 aLang)
|
|
sl@0
|
265 |
{
|
|
sl@0
|
266 |
const TText16* startCharacter = aGss.iParam.iText.Ptr();
|
|
sl@0
|
267 |
const TText16* endCharacter = startCharacter + aGss.iParam.iText.Length();
|
|
sl@0
|
268 |
const TText16* currentCharacter = aGss.iText.CurrentPosition();
|
|
sl@0
|
269 |
TInt currentPosition = currentCharacter - startCharacter;
|
|
sl@0
|
270 |
|
|
sl@0
|
271 |
// Do some new shaping
|
|
sl@0
|
272 |
|
|
sl@0
|
273 |
// First close the existing RShapeInfo
|
|
sl@0
|
274 |
if(aShapeInfo.IsOpen())
|
|
sl@0
|
275 |
aShapeInfo.Close();
|
|
sl@0
|
276 |
|
|
sl@0
|
277 |
// Find the end of Indic text whilst limiting the amount of text to be shaped to
|
|
sl@0
|
278 |
// KMaxTextToShape. When finding the end of end position of the text to be shaped,
|
|
sl@0
|
279 |
// include numerals, punctuations and other control characters.
|
|
sl@0
|
280 |
const TText16* endIndic = currentCharacter;
|
|
sl@0
|
281 |
TChar endIndicChar = *endIndic;
|
|
sl@0
|
282 |
while((endIndic <= endCharacter || endIndic - currentCharacter <= KMaxTextToShape) &&
|
|
sl@0
|
283 |
((*endIndic >= aLowChar && *endIndic <= aHighChar) ||
|
|
sl@0
|
284 |
((endIndicChar.IsDigit() || endIndicChar.IsPunctuation()) && !QuoteOrBracketPair(*endIndic))))
|
|
sl@0
|
285 |
{
|
|
sl@0
|
286 |
if (endIndic == endCharacter || endIndic - currentCharacter > KMaxTextToShape)
|
|
sl@0
|
287 |
break;
|
|
sl@0
|
288 |
endIndic = SyllableEnd(endIndic, endCharacter, aCodeMap, aMapLen);
|
|
sl@0
|
289 |
endIndicChar = *endIndic;
|
|
sl@0
|
290 |
}
|
|
sl@0
|
291 |
|
|
sl@0
|
292 |
TInt endPosForShaping = endIndic - startCharacter;
|
|
sl@0
|
293 |
|
|
sl@0
|
294 |
//Now shape from current position to the end of Hindi
|
|
sl@0
|
295 |
return aShapeInfo.Open(aGss.iFont, aGss.iParam.iText,
|
|
sl@0
|
296 |
currentPosition, endPosForShaping, aScript, aLang);
|
|
sl@0
|
297 |
}
|
|
sl@0
|
298 |
|
|
sl@0
|
299 |
/**
|
|
sl@0
|
300 |
Common function for all Indic scripts. Adds the shaped glyphs to the glyph cluster.
|
|
sl@0
|
301 |
This function is called regardless of whether shaping was done or skipped in this
|
|
sl@0
|
302 |
iteration of the Default Process
|
|
sl@0
|
303 |
*/
|
|
sl@0
|
304 |
TBool IndicPostShapingProcess(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo,
|
|
sl@0
|
305 |
TInt aCurrPos, TInt aSyllEndPos, const TText16* aSyllableEnd)
|
|
sl@0
|
306 |
{
|
|
sl@0
|
307 |
// Now get all the shaped values
|
|
sl@0
|
308 |
// Get the number of glyphs, glyphs, positions and indices after shaping.
|
|
sl@0
|
309 |
TInt numGlyphs = aShapeInfo.GlyphCount();
|
|
sl@0
|
310 |
const TInt32* glyph = aShapeInfo.Glyphs();
|
|
sl@0
|
311 |
const RShapeInfo::TPoint16* position = aShapeInfo.GlyphPositions();
|
|
sl@0
|
312 |
const TInt16* indices = aShapeInfo.Indices();
|
|
sl@0
|
313 |
TPoint origin;
|
|
sl@0
|
314 |
|
|
sl@0
|
315 |
// Shift the indices and positions until the current poisition is reached. This done so that the
|
|
sl@0
|
316 |
// origin can be set back to the original co-ordinates at the start of this Hindi text
|
|
sl@0
|
317 |
while (*indices < aCurrPos)
|
|
sl@0
|
318 |
{
|
|
sl@0
|
319 |
position++;
|
|
sl@0
|
320 |
indices++;
|
|
sl@0
|
321 |
}
|
|
sl@0
|
322 |
// Set the origin back by subtracting the current position co-ordinates from the current pen position
|
|
sl@0
|
323 |
origin.iX = aGss.iParam.iPen.iX - position->iX;
|
|
sl@0
|
324 |
origin.iY = aGss.iParam.iPen.iY - position->iY;
|
|
sl@0
|
325 |
|
|
sl@0
|
326 |
// No re-initialise the indices and positions to start appending the glyphs to clusters from the beginning
|
|
sl@0
|
327 |
indices = aShapeInfo.Indices();
|
|
sl@0
|
328 |
position = aShapeInfo.GlyphPositions();
|
|
sl@0
|
329 |
|
|
sl@0
|
330 |
// Now do some post shaping syllable chopping
|
|
sl@0
|
331 |
for (TInt i = 0; i < numGlyphs; i++, glyph++, position++, indices++)
|
|
sl@0
|
332 |
{
|
|
sl@0
|
333 |
if(*indices >= aSyllEndPos)
|
|
sl@0
|
334 |
break;
|
|
sl@0
|
335 |
if(*indices >= aCurrPos && *indices < aSyllEndPos)
|
|
sl@0
|
336 |
{
|
|
sl@0
|
337 |
aGss.iParam.iPen.iX = origin.iX + position->iX;
|
|
sl@0
|
338 |
aGss.iParam.iPen.iY = origin.iY + position->iY;
|
|
sl@0
|
339 |
|
|
sl@0
|
340 |
//Just skip the non-existing glyph and continue handling other glyphs if AppendGlyphToCluster return false.
|
|
sl@0
|
341 |
// The "continue" statement is for avoiding the potential risk of handling the non-existing glyph.
|
|
sl@0
|
342 |
if (!aGss.AppendGlyphToCluster(0x80000000UL | *glyph))
|
|
sl@0
|
343 |
continue;
|
|
sl@0
|
344 |
}
|
|
sl@0
|
345 |
}
|
|
sl@0
|
346 |
|
|
sl@0
|
347 |
// We'll do pen advance ourselves, thanks.
|
|
sl@0
|
348 |
aGss.iPen = TGlyphSelectionState::EPenAdvance_No;
|
|
sl@0
|
349 |
aGss.iParam.iPen.iX = origin.iX + position->iX;
|
|
sl@0
|
350 |
aGss.iParam.iPen.iY = origin.iY + position->iY;
|
|
sl@0
|
351 |
aGss.iClusterState = TGlyphSelectionState::EGClusterComplete;
|
|
sl@0
|
352 |
aGss.iText.SetCurrentPosition(aSyllableEnd);
|
|
sl@0
|
353 |
return ETrue;
|
|
sl@0
|
354 |
}
|
|
sl@0
|
355 |
|
|
sl@0
|
356 |
/**
|
|
sl@0
|
357 |
Common function for all Indic scripts.
|
|
sl@0
|
358 |
Performs shaping and Rasterizing operation on Indic script text
|
|
sl@0
|
359 |
*/
|
|
sl@0
|
360 |
TBool DoProcess(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo, const TIndicScriptProcessorParameters& aScriptSpecificParameters){
|
|
sl@0
|
361 |
const TText16* startCharacter = aGss.iParam.iText.Ptr();
|
|
sl@0
|
362 |
const TText16* endCharacter = startCharacter + aGss.iParam.iText.Length();
|
|
sl@0
|
363 |
const TText16* currentCharacter = aGss.iText.CurrentPosition();
|
|
sl@0
|
364 |
TInt currentPosition = currentCharacter - startCharacter;
|
|
sl@0
|
365 |
|
|
sl@0
|
366 |
// Get the logical end of the syllable from the input text. We will use this later to chop
|
|
sl@0
|
367 |
// syllables from the glyph values we get.
|
|
sl@0
|
368 |
const TText16* syllableEnd = SyllableEnd(currentCharacter, endCharacter, aScriptSpecificParameters.iCodeMap,
|
|
sl@0
|
369 |
aScriptSpecificParameters.iMapLen);
|
|
sl@0
|
370 |
TInt syllableEndPos = syllableEnd - startCharacter;
|
|
sl@0
|
371 |
|
|
sl@0
|
372 |
TInt ret = KErrNone;
|
|
sl@0
|
373 |
if(currentPosition >= aShapeInfo.EndOfShapedText())
|
|
sl@0
|
374 |
ret = IndicShapingProcess(aGss, aShapeInfo, aScriptSpecificParameters.iCodeMap, aScriptSpecificParameters.iMapLen,
|
|
sl@0
|
375 |
aScriptSpecificParameters.iUCHigh, aScriptSpecificParameters.iUCLow, aScriptSpecificParameters.iScriptCode, aScriptSpecificParameters.iLanguageCode);
|
|
sl@0
|
376 |
|
|
sl@0
|
377 |
// If an RShapeInfo could not be opened, call the default process
|
|
sl@0
|
378 |
if (ret != KErrNone)
|
|
sl@0
|
379 |
return GlyphSelector_Default::Process(aGss, aShapeInfo);
|
|
sl@0
|
380 |
|
|
sl@0
|
381 |
// Now call the post shaping process to add glyphs to the glyph cluster
|
|
sl@0
|
382 |
return IndicPostShapingProcess(aGss, aShapeInfo, currentPosition, syllableEndPos, syllableEnd);
|
|
sl@0
|
383 |
}
|
|
sl@0
|
384 |
|
|
sl@0
|
385 |
/*************************************************** D E V A N A G A R I ***************************************************/
|
|
sl@0
|
386 |
TBool GlyphSelector_Devanagari::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
|
|
sl@0
|
387 |
{
|
|
sl@0
|
388 |
return DoProcess(aGss, aShapeInfo, KIndicDevParameters);
|
|
sl@0
|
389 |
}
|
|
sl@0
|
390 |
|
|
sl@0
|
391 |
/***************************************************** K A N N A D A ******************************************************/
|
|
sl@0
|
392 |
TBool GlyphSelector_Kannada::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
|
|
sl@0
|
393 |
{
|
|
sl@0
|
394 |
return DoProcess(aGss, aShapeInfo, KIndicKanParameters);
|
|
sl@0
|
395 |
}
|
|
sl@0
|
396 |
|
|
sl@0
|
397 |
/***************************************************** G U J A R A T I ******************************************************/
|
|
sl@0
|
398 |
TBool GlyphSelector_Gujarati::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
|
|
sl@0
|
399 |
{
|
|
sl@0
|
400 |
return DoProcess(aGss, aShapeInfo, KIndicGujParameters);
|
|
sl@0
|
401 |
}
|
|
sl@0
|
402 |
|
|
sl@0
|
403 |
/***************************************************** B E N G A L I ******************************************************/
|
|
sl@0
|
404 |
TBool GlyphSelector_Bengali::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
|
|
sl@0
|
405 |
{
|
|
sl@0
|
406 |
return DoProcess(aGss, aShapeInfo, KIndicBenParameters);
|
|
sl@0
|
407 |
}
|
|
sl@0
|
408 |
|
|
sl@0
|
409 |
/***************************************************** T A M I L ******************************************************/
|
|
sl@0
|
410 |
TBool GlyphSelector_Tamil::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
|
|
sl@0
|
411 |
{
|
|
sl@0
|
412 |
return DoProcess(aGss, aShapeInfo, KIndicTamParameters);
|
|
sl@0
|
413 |
}
|
|
sl@0
|
414 |
|
|
sl@0
|
415 |
/***************************************************** T E L U G U ******************************************************/
|
|
sl@0
|
416 |
TBool GlyphSelector_Telugu::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
|
|
sl@0
|
417 |
{
|
|
sl@0
|
418 |
return DoProcess(aGss, aShapeInfo, KIndicTelParameters);
|
|
sl@0
|
419 |
}
|
|
sl@0
|
420 |
|
|
sl@0
|
421 |
/***************************************************** G U R M U K H I ******************************************************/
|
|
sl@0
|
422 |
TBool GlyphSelector_Gurmukhi::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)\
|
|
sl@0
|
423 |
{
|
|
sl@0
|
424 |
return DoProcess(aGss, aShapeInfo, KIndicGurParameters);
|
|
sl@0
|
425 |
}
|
|
sl@0
|
426 |
|
|
sl@0
|
427 |
/***************************************************** M A L A Y A L A M ******************************************************/
|
|
sl@0
|
428 |
TBool GlyphSelector_Malayalam::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
|
|
sl@0
|
429 |
{
|
|
sl@0
|
430 |
return DoProcess(aGss, aShapeInfo, KIndicMalParameters);
|
|
sl@0
|
431 |
}
|
|
sl@0
|
432 |
|