diff -r 2bd88482bfe5 -r 6a1564a2f3e6 graphicsdeviceinterface/gdi/sgdi/FontArabic.cpp --- a/graphicsdeviceinterface/gdi/sgdi/FontArabic.cpp Thu Sep 02 21:50:40 2010 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,449 +0,0 @@ -// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies). -// All rights reserved. -// This component and the accompanying materials are made available -// under the terms of "Eclipse Public License v1.0" -// which accompanies this distribution, and is available -// at the URL "http://www.eclipse.org/legal/epl-v10.html". -// -// Initial Contributors: -// Nokia Corporation - initial contribution. -// -// Contributors: -// -// Description: -// - -/** - @file - @internalComponent -*/ - - -#include -#include "FontArabic.h" -#include "GDIPANIC.h" - - -// -// Arabic Presentation Forms. -// - - -/** - The contextual forms of each character in the range 0621 - 064A, in - the order final, initial, medial; followed by the forms of - the lam-alef ligatures (lam with 0622, 0623, 0625 and 0627); - followed by the forms of the characters in the range 0671 - 06D3 -*/ -LOCAL_D const TUint16 TheArabicShapeTable[] = - { - // Contextual forms for standard Arabic letters - 0x621, 0x621, 0x621, // 621 - 0xfe82, 0x622, 0x622, // 622 - 0xfe84, 0x623, 0x623, // 623 - 0xfe86, 0x624, 0x624, // 624 - 0xfe88, 0x625, 0x625, // 625 - 0xfe8a, 0xfe8b, 0xfe8c, // 626 - 0xfe8e, 0x627, 0x627, // 627 - 0xfe90, 0xfe91, 0xfe92, // 628 - 0xfe94, 0x629, 0x629, // 629 - 0xfe96, 0xfe97, 0xfe98, // 62a - 0xfe9a, 0xfe9b, 0xfe9c, // 62b - 0xfe9e, 0xfe9f, 0xfea0, // 62c - 0xfea2, 0xfea3, 0xfea4, // 62d - 0xfea6, 0xfea7, 0xfea8, // 62e - 0xfeaa, 0x62f, 0x62f, // 62f - 0xfeac, 0x630, 0x630, // 630 - 0xfeae, 0x631, 0x631, // 631 - 0xfeb0, 0x632, 0x632, // 632 - 0xfeb2, 0xfeb3, 0xfeb4, // 633 - 0xfeb6, 0xfeb7, 0xfeb8, // 634 - 0xfeba, 0xfebb, 0xfebc, // 635 - 0xfebe, 0xfebf, 0xfec0, // 636 - 0xfec2, 0xfec3, 0xfec4, // 637 - 0xfec6, 0xfec7, 0xfec8, // 638 - 0xfeca, 0xfecb, 0xfecc, // 639 - 0xfece, 0xfecf, 0xfed0, // 63a - 0x63b, 0x63b, 0x63b, // placeholder - 0x63c, 0x63c, 0x63c, // placeholder - 0x63d, 0x63d, 0x63d, // placeholder - 0x63e, 0x63e, 0x63e, // placeholder - 0x63f, 0x63f, 0x63f, // placeholder - 0x640, 0x640, 0x640, // 640 - 0xfed2, 0xfed3, 0xfed4, // 641 - 0xfed6, 0xfed7, 0xfed8, // 642 - 0xfeda, 0xfedb, 0xfedc, // 643 - 0xfede, 0xfedf, 0xfee0, // 644 - 0xfee2, 0xfee3, 0xfee4, // 645 - 0xfee6, 0xfee7, 0xfee8, // 646 - 0xfeea, 0xfeeb, 0xfeec, // 647 - 0xfeee, 0x648, 0x648, // 648 - 0xfef0, 0xfbe8, 0xfbe9, // 649 - 0xfef2, 0xfef3, 0xfef4, // 64A - - // Contextual forms for lam-alef ligatures - 0xfef6, 0xfef5, 0xfef5, // 644 + 622 - 0xfef8, 0xfef7, 0xfef7, // 644 + 623 - 0xfefa, 0xfef9, 0xfef9, // 644 + 625 - 0xfefc, 0xfefb, 0xfefb, // 644 + 627 - - // Contextual forms for extended Arabic letters for Persian, Urdu, Sindhi, etc. - 0xfb51, 0x0671, 0x0671, // 671 - 0x0672, 0x0672, 0x0672, // placeholder - 0x0673, 0x0673, 0x0673, // placeholder - 0x0674, 0x0674, 0x0674, // placeholder - 0x0675, 0x0675, 0x0675, // placeholder - 0x0676, 0x0676, 0x0676, // placeholder - 0x0677, 0x0677, 0x0677, // placeholder - 0x0678, 0x0678, 0x0678, // placeholder - 0xfb67, 0xfb68, 0xfb69, // 679 - 0xfb5f, 0xfb60, 0xfb61, // 67a - 0xfb53, 0xfb54, 0xfb55, // 67b - 0x067c, 0x067c, 0x067c, // placeholder - 0x067d, 0x067d, 0x067d, // placeholder - 0xfb57, 0xfb58, 0xfb59, // 67e - 0xfb63, 0xfb64, 0xfb65, // 67f - - 0xfb5b, 0xfb5c, 0xfb5d, // 680 - 0x0681, 0x0681, 0x0681, // placeholder - 0x0682, 0x0682, 0x0682, // placeholder - 0xfb77, 0xfb78, 0xfb79, // 683 - 0xfb73, 0xfb74, 0xfb75, // 684 - 0x0685, 0x0685, 0x0685, // placeholder - 0xfb7b, 0xfb7c, 0xfb7d, // 686 - 0xfb7f, 0xfb80, 0xfb81, // 687 - 0xfb89, 0x0688, 0x0688, // 688 - 0x0689, 0x0689, 0x0689, // placeholder - 0x068a, 0x068a, 0x068a, // placeholder - 0x068b, 0x068b, 0x068b, // placeholder - 0xfb85, 0x068c, 0x068c, // 68c - 0xfb83, 0x068d, 0x068d, // 68d - 0xfb87, 0x068e, 0x068e, // 68e - 0x068f, 0x068f, 0x068f, // placeholder - - 0x0690, 0x0690, 0x0690, // placeholder - 0xfb8d, 0x0691, 0x0691, // 691 - 0x0692, 0x0692, 0x0692, // placeholder - 0x0693, 0x0693, 0x0693, // placeholder - 0x0694, 0x0694, 0x0694, // placeholder - 0x0695, 0x0695, 0x0695, // placeholder - 0x0696, 0x0696, 0x0696, // placeholder - 0x0697, 0x0697, 0x0697, // placeholder - 0xfb8b, 0x0698, 0x0698, // 698 - 0x0699, 0x0699, 0x0699, // placeholder - 0x069a, 0x069a, 0x069a, // placeholder - 0x069b, 0x069b, 0x069b, // placeholder - 0x069c, 0x069c, 0x069c, // placeholder - 0x069d, 0x069d, 0x069d, // placeholder - 0x069e, 0x069e, 0x069e, // placeholder - 0x069f, 0x069f, 0x069f, // placeholder - - 0x06a0, 0x06a0, 0x06a0, // placeholder - 0x06a1, 0x06a1, 0x06a1, // placeholder - 0x06a2, 0x06a2, 0x06a2, // placeholder - 0x06a3, 0x06a3, 0x06a3, // placeholder - 0xfb6b, 0xfb6c, 0xfb6d, // 6a4 - 0x06a5, 0x06a5, 0x06a5, // placeholder - 0xfb6f, 0xfb70, 0xfb71, // 6a6 - 0x06a7, 0x06a7, 0x06a7, // placeholder - 0x06a8, 0x06a8, 0x06a8, // placeholder - 0xfb8f, 0xfb90, 0xfb91, // 6a9 - 0x06aa, 0x06aa, 0x06aa, // 6aa - 0x06ab, 0x06ab, 0x06ab, // 6ab - 0x06ac, 0x06ac, 0x06ac, // 6ac - 0xfbd4, 0xfbd5, 0xfbd6, // 6ad - 0x06ae, 0x06ae, 0x06ae, // 6ae - 0xfb93, 0xfb94, 0xfb95, // 6af - - 0x06b0, 0x06b0, 0x06b0, // placeholder - 0xfb9b, 0xfb9c, 0xfb9d, // 6b1 - 0x06b2, 0x06b2, 0x06b2, // 6b2 - 0xfb97, 0xfb98, 0xfb99, // 6b3 - 0x06b4, 0x06b4, 0x06b4, // placeholder - 0x06b5, 0x06b5, 0x06b5, // placeholder - 0x06b6, 0x06b6, 0x06b6, // placeholder - 0x06b7, 0x06b7, 0x06b7, // placeholder - 0x06b8, 0x06b8, 0x06b8, // placeholder - 0x06b9, 0x06b9, 0x06b9, // placeholder - 0xfb9f, 0x06ba, 0x06ba, // 6ba - 0xfba1, 0xfba2, 0xfba3, // 6bb - 0x06bc, 0x06bc, 0x06bc, // placeholder - 0x06bd, 0x06bd, 0x06bd, // placeholder - 0xfbab, 0xfbac, 0xfbad, // 6be - 0x06bf, 0x06bf, 0x06bf, // placeholder - - 0xfba5, 0x06c0, 0x06c0, // 6c0 - 0xfba7, 0xfba8, 0xfba9, // 6c1 - 0x06c2, 0x06c2, 0x06c2, // placeholder - 0x06c3, 0x06c3, 0x06c3, // placeholder - 0x06c4, 0x06c4, 0x06c4, // placeholder - 0xfbe1, 0x06c5, 0x06c5, // 6c5 - 0xfbda, 0x06c6, 0x06c6, // 6c6 - 0xfbd8, 0x06c7, 0x06c7, // 6c7 - 0xfbdc, 0x06c8, 0x06c8, // 6c8 - 0xfbe3, 0x06c9, 0x06c9, // 6c9 - 0x06ca, 0x06ca, 0x06ca, // placeholder - 0xfbdf, 0x06cb, 0x06cb, // 6cb - 0xfbfd, 0xfbfe, 0xfbff, // 6cc - 0x06cd, 0x06cd, 0x06cd, // placeholder - 0x06ce, 0x06ce, 0x06ce, // placeholder - 0x06cf, 0x06cf, 0x06cf, // placeholder - - 0xfbe5, 0xfbe6, 0xfbe7, // 6d0 - 0x06d1, 0x06d1, 0x06d1, // placeholder - 0xfbaf, 0x06d2, 0x06d2, // 6d2 - 0xfbb1, 0x06d3, 0x06d3 // 6d3 - }; - - -static const int KFinal = 0; -static const int KInitial = 1; -static const int KMedial = 2; -static const int KStandardShapeTableOffset = 0x621; -static const int KLamAlefShapeTableStart = 0x64B - 0x621; -static const int KExtendedShapeTableOffset = 0x671 - (0x64f - 0x621); - - -static inline TInt ArabicShapeTableIndex(TInt aCode) - { - if (aCode >= 0x621 && aCode <= 0x64a) - return (aCode - KStandardShapeTableOffset) * 3; - if (aCode >= 0x671 && aCode <= 0x6d3) - return (aCode - KExtendedShapeTableOffset) * 3; - return KErrNotFound; - } - - -static inline TBool IsArabicPoint(TInt aCode) - { - return (aCode >= 0x64B && aCode <= 0x655) || aCode == 0x670; - } - -TInt ConsumeCharsAndDeterminePresentationForm(const TUtf32Iterator& aText, - TUint aFlags, TInt& aLigaturePortionsRemaining) -/** - Get the Arabic or other presentation form, consuming as many characters - as necessary. This function can cope with text that has already been - reversed. -@internalComponent -*/ - { - TUint c = aText.Get(); - TInt index = ArabicShapeTableIndex(c); - if (index != -1) - { - if (aLigaturePortionsRemaining != 0) - { - --aLigaturePortionsRemaining; - GDI_ASSERT_DEBUG(!aText.AtEnd(), EGdiPanic_Invariant); - return 0xFFFF; - } - - int position = -1; - - // Find previous and next character, skipping Arabic points. - TUtf32Iterator tmpText(aText); - tmpText.Prev(); - TUint prev = 0xFFFF; - while (!tmpText.BeforeStart() && (prev == 0xFFFF || IsArabicPoint(prev))) - prev = tmpText.GetThenPrev(); - - tmpText = aText; - tmpText.Next(); - TUint next = 0xFFFF; - while (!tmpText.AtEnd() && (next == 0xFFFF || IsArabicPoint(next))) - next = tmpText.GetThenNext(); - - TInt possible_lam = (aFlags & CFont::TPositionParam::EFLogicalOrder)? - c : next; - TInt possible_alef = (aFlags & CFont::TPositionParam::EFLogicalOrder)? - next : c; - - // Perform lam-alef ligation if necessary. - if (possible_lam == 0x644 && - (possible_alef == 0x622 || possible_alef == 0x623 || possible_alef == 0x625 || possible_alef == 0x627)) - { - switch(possible_alef) - { - case 0x622: - { - c = 0xfef5; - index = KLamAlefShapeTableStart; - break; - } - case 0x623: - { - c = 0xfef7; - index = KLamAlefShapeTableStart + 1; - break; - } - case 0x625: - { - c = 0xfef9; - index = KLamAlefShapeTableStart + 2; - break; - } - default: - { - c = 0xfefb; - index = KLamAlefShapeTableStart + 3; - } - } - index *= 3; - aLigaturePortionsRemaining = 2; - - next = 0xFFFF; - while (!tmpText.AtEnd() && (next == 0xFFFF || IsArabicPoint(next))) - { - next = tmpText.Get(); - tmpText.Next(); - } - } - - TInt left = (aFlags & CFont::TPositionParam::EFLogicalOrder)? prev : next; - TInt right = (aFlags & CFont::TPositionParam::EFLogicalOrder)? next : prev; - - TBool prefix = FALSE; - if (left == 0x640 || left == 0x200D) // kashida or Zero-Width Joiner - prefix = TRUE; - else - { - TInt left_index = ArabicShapeTableIndex(left); - if (left_index != -1) - { - if (static_cast(TheArabicShapeTable[left_index + KInitial]) != left || - static_cast(TheArabicShapeTable[left_index + KMedial]) != left) - prefix = TRUE; - } - } - TBool suffix = FALSE; - if (right == 0x640 || right == 0x200D) // kashida or Zero-Width Joiner - suffix = TRUE; - else - { - TInt right_index = ArabicShapeTableIndex(right); - if (right_index != -1) - { - if (static_cast(TheArabicShapeTable[right_index + KFinal]) != right || - static_cast(TheArabicShapeTable[right_index + KMedial]) != right) - suffix = TRUE; - } - } - TBool medial = static_cast(TheArabicShapeTable[index + KMedial]) != c; - if (medial) - { - if (prefix && suffix) - position = KMedial; - else if (prefix) - position = KFinal; - else if (suffix) - position = KInitial; - } - else - { - if (prefix) - position = KFinal; - else if (suffix) - position = KInitial; - } - if (position >= 0) - c = TheArabicShapeTable[index + position]; - } - - return c; - } - - -// -// -// GlyphSelector_Arabic Class definition -// -// - -TBool GlyphSelector_Arabic::Process(TGlyphSelectionState& aGss, RShapeInfo&) - { - // Select glyph - use presentation form if applicable. - TInt ligaturePortions = aGss.iLigaturePortionsRemaining; - TUint flags = aGss.iParam.iFlags; - TUint code = ConsumeCharsAndDeterminePresentationForm(aGss.iText, - flags, ligaturePortions); - - aGss.iText.Next(); - aGss.iClusterState = !aGss.iText.AtEnd() && - (aGss.iText.Get().GetCategory() & 0xF0) == TChar::EMarkGroup? - TGlyphSelectionState::EGClusterNotComplete - : TGlyphSelectionState::EGClusterComplete; - - // If we are beginning a new portion of a ligature, we must set the state. - if (ligaturePortions != aGss.iLigaturePortionsRemaining) - { - if (ligaturePortions != 1) - aGss.iClusterState = TGlyphSelectionState::EGClusterNotComplete; - aGss.iLigaturePortionFirstMark = aGss.iParam.iOutputGlyphs; - if (ligaturePortions < aGss.iLigaturePortionsRemaining) - { - aGss.iLigaturePortionsRemaining = ligaturePortions; - // We have just swallowed a non-initial part of the ligature, which - // must not be drawn. - GDI_ASSERT_DEBUG(code == 0xFFFF, EGdiPanic_Invariant); - return ETrue; - } - aGss.iLigaturePortionsRemaining = ligaturePortions; - } - - // In this method we always output the glyph code calculate previously. - if (!aGss.AppendGlyphToCluster(code)) - return EFalse; - - if (!aGss.IsCombiningClass()) - { - aGss.iPen = TGlyphSelectionState::EPenAdvance_Yes; - return ETrue; - } - - // Adjust glyph's bounds further to position this character. - aGss.iPen = TGlyphSelectionState::EPenAdvance_No; - TRect baseBounds = aGss.iParam.iOutput[0].iBounds; - TInt firstMark = 1; - if (aGss.iLigaturePortionsRemaining != 0) - { - TInt centre = (baseBounds.iBr.iX + baseBounds.iTl.iX) >> 1; - TBool firstHalf = aGss.iLigaturePortionsRemaining == 2; - TBool rightHandSide = flags & CFont::TPositionParam::EFLogicalOrder? - firstHalf : !firstHalf; - if (rightHandSide) - baseBounds.iTl.iX = centre; - else - baseBounds.iBr.iX = centre; - if (firstHalf) - aGss.iClusterState = TGlyphSelectionState::EGClusterNotComplete; - firstMark = aGss.iLigaturePortionFirstMark; - } - aGss.CombineLastGlyphToBase(baseBounds, firstMark); - - return ETrue; - } - - -TBool GlyphSelector_Arabic::CharactersJoin(TInt aLeftCharacter, TInt aRightCharacter) - { - // All the characters join to the right, so we don't need to look them up. - // as long as they are there at all, it is OK. - TBool leftIsFixedJoiner = aLeftCharacter == 0x640 || aLeftCharacter == 0x200D; - if (!leftIsFixedJoiner) - { - TInt leftIndex = ArabicShapeTableIndex(aLeftCharacter); - if (leftIndex == -1) - return EFalse; - if (static_cast(TheArabicShapeTable[leftIndex + KFinal]) - == aLeftCharacter) - return EFalse; - } - if (aRightCharacter == 0x640 || aRightCharacter == 0x200D) - return !leftIsFixedJoiner; - TInt rightIndex = ArabicShapeTableIndex(aRightCharacter); - return rightIndex != -1 - && static_cast(TheArabicShapeTable[rightIndex + KInitial]) - != aRightCharacter; - } -