mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-11-11 05:33:33 +00:00
5ca3be4d67
for entering math accents, such that an umlauted A is translated as \ddot{A},
for example.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@26577 a592a061-630c-0410-9148-cb99ea01b6c8
850 lines
23 KiB
C++
850 lines
23 KiB
C++
/**
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* \file Encoding.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Lars Gullik Bjønnes
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* \author Jean-Marc Lasgouttes
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* \author Dekel Tsur
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "Encoding.h"
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#include "Buffer.h"
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#include "InsetIterator.h"
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#include "LaTeXFeatures.h"
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#include "Lexer.h"
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#include "LyXRC.h"
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#include "support/debug.h"
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#include "support/FileName.h"
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#include "support/lstrings.h"
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#include "support/unicode.h"
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#include <boost/cstdint.hpp>
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#include <sstream>
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using namespace std;
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using namespace lyx::support;
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namespace lyx {
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Encodings encodings;
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Encodings::MathCommandSet Encodings::mathcmd;
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Encodings::TextCommandSet Encodings::textcmd;
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Encodings::MathSymbolSet Encodings::mathsym;
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namespace {
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char_type arabic_table[172][4] = {
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{0xfe80, 0xfe80, 0xfe80, 0xfe80}, // 0x0621 = hamza
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{0xfe81, 0xfe82, 0xfe81, 0xfe82}, // 0x0622 = ligature madda on alef
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{0xfe83, 0xfe84, 0xfe83, 0xfe84}, // 0x0623 = ligature hamza on alef
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{0xfe85, 0xfe86, 0xfe85, 0xfe86}, // 0x0624 = ligature hamza on waw
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{0xfe87, 0xfe88, 0xfe87, 0xfe88}, // 0x0625 = ligature hamza under alef
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{0xfe89, 0xfe8a, 0xfe8b, 0xfe8c}, // 0x0626 = ligature hamza on ya
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{0xfe8d, 0xfe8e, 0xfe8d, 0xfe8e}, // 0x0627 = alef
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{0xfe8f, 0xfe90, 0xfe91, 0xfe92}, // 0x0628 = baa
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{0xfe93, 0xfe94, 0xfe93, 0xfe94}, // 0x0629 = taa marbuta
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{0xfe95, 0xfe96, 0xfe97, 0xfe98}, // 0x062a = taa
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{0xfe99, 0xfe9a, 0xfe9b, 0xfe9c}, // 0x062b = thaa
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{0xfe9d, 0xfe9e, 0xfe9f, 0xfea0}, // 0x062c = jeem
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{0xfea1, 0xfea2, 0xfea3, 0xfea4}, // 0x062d = haa
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{0xfea5, 0xfea6, 0xfea7, 0xfea8}, // 0x062e = khaa
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{0xfea9, 0xfeaa, 0xfea9, 0xfeaa}, // 0x062f = dal
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{0xfeab, 0xfeac, 0xfeab, 0xfeac}, // 0x0630 = thal
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{0xfead, 0xfeae, 0xfead, 0xfeae}, // 0x0631 = ra
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{0xfeaf, 0xfeb0, 0xfeaf, 0xfeb0}, // 0x0632 = zain
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{0xfeb1, 0xfeb2, 0xfeb3, 0xfeb4}, // 0x0633 = seen
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{0xfeb5, 0xfeb6, 0xfeb7, 0xfeb8}, // 0x0634 = sheen
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{0xfeb9, 0xfeba, 0xfebb, 0xfebc}, // 0x0635 = sad
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{0xfebd, 0xfebe, 0xfebf, 0xfec0}, // 0x0636 = dad
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{0xfec1, 0xfec2, 0xfec3, 0xfec4}, // 0x0637 = tah
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{0xfec5, 0xfec6, 0xfec7, 0xfec8}, // 0x0638 = zah
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{0xfec9, 0xfeca, 0xfecb, 0xfecc}, // 0x0639 = ain
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{0xfecd, 0xfece, 0xfecf, 0xfed0}, // 0x063a = ghain
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{0, 0, 0, 0}, // 0x063b
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{0, 0, 0, 0}, // 0x063c
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{0, 0, 0, 0}, // 0x063d
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{0, 0, 0, 0}, // 0x063e
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{0, 0, 0, 0}, // 0x063f
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{0, 0, 0, 0}, // 0x0640
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{0xfed1, 0xfed2, 0xfed3, 0xfed4}, // 0x0641 = fa
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{0xfed5, 0xfed6, 0xfed7, 0xfed8}, // 0x0642 = qaf
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{0xfed9, 0xfeda, 0xfedb, 0xfedc}, // 0x0643 = kaf
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{0xfedd, 0xfede, 0xfedf, 0xfee0}, // 0x0644 = lam
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{0xfee1, 0xfee2, 0xfee3, 0xfee4}, // 0x0645 = meem
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{0xfee5, 0xfee6, 0xfee7, 0xfee8}, // 0x0646 = noon
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{0xfee9, 0xfeea, 0xfeeb, 0xfeec}, // 0x0647 = ha
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{0xfeed, 0xfeee, 0xfeed, 0xfeee}, // 0x0648 = waw
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{0xfeef, 0xfef0, 0xfeef, 0xfef0}, // 0x0649 = alef maksura
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{0xfef1, 0xfef2, 0xfef3, 0xfef4}, // 0x064a = ya
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{0x065b, 0x065b, 0x065b, 0x065b}, // 0x064b = fathatan
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{0x065c, 0x065c, 0x065c, 0x065c}, // 0x064c = dammatan
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{0x064d, 0x064d, 0x064d, 0x064d}, // 0x064d = kasratan
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{0x064e, 0x064e, 0x064e, 0x064e}, // 0x064e = fatha
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{0x064f, 0x064f, 0x064f, 0x064f}, // 0x064f = damma
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{0x0650, 0x0650, 0x0650, 0x0650}, // 0x0650 = kasra
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{0x0651, 0x0651, 0x0651, 0x0651}, // 0x0651 = shadda
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{0x0652, 0x0652, 0x0652, 0x0652}, // 0x0652 = sukun
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{0, 0, 0, 0}, // 0x0653
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{0, 0, 0, 0}, // 0x0654
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{0, 0, 0, 0}, // 0x0655
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{0, 0, 0, 0}, // 0x0656
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{0, 0, 0, 0}, // 0x0657
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{0, 0, 0, 0}, // 0x0658
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{0, 0, 0, 0}, // 0x0659
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{0, 0, 0, 0}, // 0x065a
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{0, 0, 0, 0}, // 0x065b
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{0, 0, 0, 0}, // 0x065c
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{0, 0, 0, 0}, // 0x065d
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{0, 0, 0, 0}, // 0x065e
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{0, 0, 0, 0}, // 0x065f
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{0, 0, 0, 0}, // 0x0660
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{0, 0, 0, 0}, // 0x0661
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{0, 0, 0, 0}, // 0x0662
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{0, 0, 0, 0}, // 0x0663
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{0, 0, 0, 0}, // 0x0664
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{0, 0, 0, 0}, // 0x0665
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{0, 0, 0, 0}, // 0x0666
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{0, 0, 0, 0}, // 0x0667
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{0, 0, 0, 0}, // 0x0668
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{0, 0, 0, 0}, // 0x0669
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{0, 0, 0, 0}, // 0x066a
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{0, 0, 0, 0}, // 0x066b
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{0, 0, 0, 0}, // 0x066c
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{0, 0, 0, 0}, // 0x066d
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{0, 0, 0, 0}, // 0x066e
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{0, 0, 0, 0}, // 0x066f
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{0, 0, 0, 0}, // 0x0670
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{0, 0, 0, 0}, // 0x0671
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{0, 0, 0, 0}, // 0x0672
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{0, 0, 0, 0}, // 0x0673
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{0, 0, 0, 0}, // 0x0674
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{0, 0, 0, 0}, // 0x0675
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{0, 0, 0, 0}, // 0x0676
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{0, 0, 0, 0}, // 0x0677
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{0, 0, 0, 0}, // 0x0678
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{0, 0, 0, 0}, // 0x0679
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{0, 0, 0, 0}, // 0x067a
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{0, 0, 0, 0}, // 0x067b
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{0, 0, 0, 0}, // 0x067c
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{0, 0, 0, 0}, // 0x067d
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{0xfb56, 0xfb57, 0xfb58, 0xfb59}, // 0x067e = peh
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{0, 0, 0, 0}, // 0x067f
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{0, 0, 0, 0}, // 0x0680
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{0, 0, 0, 0}, // 0x0681
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{0, 0, 0, 0}, // 0x0682
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{0, 0, 0, 0}, // 0x0683
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{0, 0, 0, 0}, // 0x0684
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{0, 0, 0, 0}, // 0x0685
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{0xfb7a, 0xfb7b, 0xfb7c, 0xfb7d}, // 0x0686 = tcheh
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{0, 0, 0, 0}, // 0x0687
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{0, 0, 0, 0}, // 0x0688
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{0, 0, 0, 0}, // 0x0689
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{0, 0, 0, 0}, // 0x068a
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{0, 0, 0, 0}, // 0x068b
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{0, 0, 0, 0}, // 0x068c
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{0, 0, 0, 0}, // 0x068d
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{0, 0, 0, 0}, // 0x068e
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{0, 0, 0, 0}, // 0x068f
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{0, 0, 0, 0}, // 0x0690
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{0, 0, 0, 0}, // 0x0691
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{0, 0, 0, 0}, // 0x0692
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{0, 0, 0, 0}, // 0x0693
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{0, 0, 0, 0}, // 0x0694
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{0, 0, 0, 0}, // 0x0695
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{0, 0, 0, 0}, // 0x0696
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{0, 0, 0, 0}, // 0x0697
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{0xfb8a, 0xfb8b, 0xfb8a, 0xfb8b}, // 0x0698 = jeh
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{0, 0, 0, 0}, // 0x0699
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{0, 0, 0, 0}, // 0x069a
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{0, 0, 0, 0}, // 0x069b
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{0, 0, 0, 0}, // 0x069c
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{0, 0, 0, 0}, // 0x069d
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{0, 0, 0, 0}, // 0x069e
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{0, 0, 0, 0}, // 0x069f
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{0, 0, 0, 0}, // 0x06a0
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{0, 0, 0, 0}, // 0x06a1
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{0, 0, 0, 0}, // 0x06a2
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{0, 0, 0, 0}, // 0x06a3
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{0, 0, 0, 0}, // 0x06a4
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{0, 0, 0, 0}, // 0x06a5
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{0, 0, 0, 0}, // 0x06a6
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{0, 0, 0, 0}, // 0x06a7
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{0, 0, 0, 0}, // 0x06a8
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{0xfb8e, 0xfb8f, 0xfb90, 0xfb91}, // 0x06a9 = farsi kaf
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{0, 0, 0, 0}, // 0x06aa
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{0, 0, 0, 0}, // 0x06ab
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{0, 0, 0, 0}, // 0x06ac
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{0, 0, 0, 0}, // 0x06ad
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{0, 0, 0, 0}, // 0x06ae
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{0xfb92, 0xfb93, 0xfb94, 0xfb95}, // 0x06af = gaf
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{0, 0, 0, 0}, // 0x06b0
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{0, 0, 0, 0}, // 0x06b1
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{0, 0, 0, 0}, // 0x06b2
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{0, 0, 0, 0}, // 0x06b3
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{0, 0, 0, 0}, // 0x06b4
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{0, 0, 0, 0}, // 0x06b5
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{0, 0, 0, 0}, // 0x06b6
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{0, 0, 0, 0}, // 0x06b7
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{0, 0, 0, 0}, // 0x06b8
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{0, 0, 0, 0}, // 0x06b9
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{0, 0, 0, 0}, // 0x06ba
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{0, 0, 0, 0}, // 0x06bb
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{0, 0, 0, 0}, // 0x06bc
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{0, 0, 0, 0}, // 0x06bd
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{0, 0, 0, 0}, // 0x06be
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{0, 0, 0, 0}, // 0x06bf
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{0, 0, 0, 0}, // 0x06c0
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{0, 0, 0, 0}, // 0x06c1
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{0, 0, 0, 0}, // 0x06c2
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{0, 0, 0, 0}, // 0x06c3
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{0, 0, 0, 0}, // 0x06c4
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{0, 0, 0, 0}, // 0x06c5
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{0, 0, 0, 0}, // 0x06c6
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{0, 0, 0, 0}, // 0x06c7
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{0, 0, 0, 0}, // 0x06c8
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{0, 0, 0, 0}, // 0x06c9
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{0, 0, 0, 0}, // 0x06ca
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{0, 0, 0, 0}, // 0x06cb
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{0xfbfc, 0xfbfd, 0xfbfe, 0xfbff} // 0x06cc = farsi yeh
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};
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char_type const arabic_start = 0x0621;
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char_type const arabic_end = 0x06cc;
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/// Information about a single UCS4 character
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struct CharInfo {
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/// LaTeX command (text mode) for this character
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docstring textcommand;
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/// LaTeX command (math mode) for this character
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docstring mathcommand;
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/// Needed LaTeX preamble (or feature) for text mode
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string textpreamble;
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/// Needed LaTeX preamble (or feature) for math mode
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string mathpreamble;
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/// Is this a combining character?
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bool combining;
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/// Is \c textpreamble a feature known by LaTeXFeatures, or a raw LaTeX
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/// command?
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bool textfeature;
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/// Is \c mathpreamble a feature known by LaTeXFeatures, or a raw LaTeX
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/// command?
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bool mathfeature;
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/// Always force the LaTeX command, even if the encoding contains
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/// this character?
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bool force;
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};
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typedef map<char_type, CharInfo> CharInfoMap;
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CharInfoMap unicodesymbols;
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typedef std::set<char_type> CharSet;
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CharSet forced;
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typedef std::set<char_type> MathAlphaSet;
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MathAlphaSet mathalpha;
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/// The highest code point in UCS4 encoding (1<<20 + 1<<16)
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char_type const max_ucs4 = 0x110000;
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} // namespace anon
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EncodingException::EncodingException(char_type c)
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: failed_char(c), par_id(0), pos(0)
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{
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}
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const char * EncodingException::what() const throw()
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{
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return "Could not find LaTeX command for a character";
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}
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Encoding::Encoding(string const & n, string const & l, string const & g,
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string const & i, bool f, Encoding::Package p)
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: name_(n), latexName_(l), guiName_(g), iconvName_(i), fixedwidth_(f), package_(p)
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{
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if (n == "ascii") {
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// ASCII can encode 128 code points and nothing else
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start_encodable_ = 128;
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complete_ = true;
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} else if (i == "UTF-8") {
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// UTF8 can encode all UCS4 code points
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start_encodable_ = max_ucs4;
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complete_ = true;
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} else {
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complete_ = false;
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}
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}
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void Encoding::init() const
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{
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if (complete_)
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return;
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start_encodable_ = 0;
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// temporarily switch off lyxerr, since we will generate iconv errors
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lyxerr.disable();
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if (fixedwidth_) {
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// We do not need to check all UCS4 code points, it is enough
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// if we check all 256 code points of this encoding.
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for (unsigned short j = 0; j < 256; ++j) {
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char const c = char(j);
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vector<char_type> const ucs4 = eightbit_to_ucs4(&c, 1, iconvName_);
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if (ucs4.size() != 1)
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continue;
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char_type const uc = ucs4[0];
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CharInfoMap::const_iterator const it = unicodesymbols.find(uc);
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if (it == unicodesymbols.end() || !it->second.force)
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encodable_.insert(uc);
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}
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} else {
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// We do not know how many code points this encoding has, and
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// they do not have a direct representation as a single byte,
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// therefore we need to check all UCS4 code points.
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// This is expensive!
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for (char_type c = 0; c < max_ucs4; ++c) {
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vector<char> const eightbit = ucs4_to_eightbit(&c, 1, iconvName_);
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if (!eightbit.empty()) {
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CharInfoMap::const_iterator const it = unicodesymbols.find(c);
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if (it == unicodesymbols.end() || !it->second.force)
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encodable_.insert(c);
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}
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}
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}
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lyxerr.enable();
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CharSet::iterator it = encodable_.find(start_encodable_);
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while (it != encodable_.end()) {
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encodable_.erase(it);
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++start_encodable_;
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it = encodable_.find(start_encodable_);
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}
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complete_ = true;
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}
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docstring Encoding::latexChar(char_type c, bool for_mathed) const
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{
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// assure the used encoding is properly initialized
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init();
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if (iconvName_ == "UTF-8" && package_ == none)
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return docstring(1, c);
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if (c < start_encodable_ && !encodings.isForced(c))
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return docstring(1, c);
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if (encodable_.find(c) != encodable_.end())
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return docstring(1, c);
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if (for_mathed)
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return docstring();
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// c cannot (or should not) be encoded in this encoding
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CharInfoMap::const_iterator const it = unicodesymbols.find(c);
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if (it == unicodesymbols.end())
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throw EncodingException(c);
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// at least one of mathcommand and textcommand is nonempty
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if (it->second.textcommand.empty())
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return "\\ensuremath{" + it->second.mathcommand + '}';
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return it->second.textcommand;
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}
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vector<char_type> Encoding::symbolsList() const
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{
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// assure the used encoding is properly initialized
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init();
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// first all encodable characters
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vector<char_type> symbols(encodable_.begin(), encodable_.end());
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// add those below start_encodable_
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for (char_type c = 0; c < start_encodable_; ++c)
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symbols.push_back(c);
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// now the ones from the unicodesymbols file
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CharInfoMap::const_iterator const end = unicodesymbols.end();
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CharInfoMap::const_iterator it = unicodesymbols.begin();
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for (; it != end; ++it)
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symbols.push_back(it->first);
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return symbols;
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}
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bool Encodings::latexMathChar(char_type c, bool mathmode,
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Encoding const * encoding, docstring & command)
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{
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if (encoding)
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command = encoding->latexChar(c, true);
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CharInfoMap::const_iterator const it = unicodesymbols.find(c);
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if (it == unicodesymbols.end()) {
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if (!encoding || command.empty())
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throw EncodingException(c);
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if (mathmode)
|
|
addMathSym(c);
|
|
return false;
|
|
}
|
|
// at least one of mathcommand and textcommand is nonempty
|
|
bool use_math = (mathmode && !it->second.mathcommand.empty()) ||
|
|
(!mathmode && it->second.textcommand.empty());
|
|
if (use_math) {
|
|
command = it->second.mathcommand;
|
|
addMathCmd(c);
|
|
} else {
|
|
if (!encoding || command.empty()) {
|
|
command = it->second.textcommand;
|
|
addTextCmd(c);
|
|
} else if (mathmode)
|
|
addMathSym(c);
|
|
}
|
|
return use_math;
|
|
}
|
|
|
|
|
|
char_type Encodings::fromLaTeXCommand(docstring const & cmd, bool & combining)
|
|
{
|
|
CharInfoMap::const_iterator const end = unicodesymbols.end();
|
|
CharInfoMap::const_iterator it = unicodesymbols.begin();
|
|
for (; it != end; ++it) {
|
|
docstring const math = it->second.mathcommand;
|
|
docstring const text = it->second.textcommand;
|
|
if (math == cmd || text == cmd) {
|
|
combining = it->second.combining;
|
|
return it->first;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
docstring Encodings::fromLaTeXCommand(docstring const & cmd, docstring & rem)
|
|
{
|
|
docstring symbols;
|
|
size_t i = 0;
|
|
size_t const cmdend = cmd.size();
|
|
CharInfoMap::const_iterator const uniend = unicodesymbols.end();
|
|
for (size_t j = 0; j < cmdend; ++j) {
|
|
// Also get the char after a backslash
|
|
if (j + 1 < cmdend && cmd[j] == '\\')
|
|
++j;
|
|
// If a macro argument follows, get it, too
|
|
if (j + 1 < cmdend && cmd[j + 1] == '{') {
|
|
size_t k = j + 1;
|
|
int count = 1;
|
|
while (k < cmdend && count && k != docstring::npos) {
|
|
k = cmd.find_first_of(from_ascii("{}"), k + 1);
|
|
if (cmd[k] == '{')
|
|
++count;
|
|
else
|
|
--count;
|
|
}
|
|
if (k != docstring::npos)
|
|
j = k;
|
|
}
|
|
// Start with this substring and try augmenting it when it is
|
|
// the prefix of some command in the unicodesymbols file
|
|
docstring const subcmd = cmd.substr(i, j - i + 1);
|
|
|
|
CharInfoMap::const_iterator it = unicodesymbols.begin();
|
|
size_t unicmd_size = 0;
|
|
char_type c = 0;
|
|
for (; it != uniend; ++it) {
|
|
docstring const math = it->second.mathcommand;
|
|
docstring const text = it->second.textcommand;
|
|
size_t cur_size = max(math.size(), text.size());
|
|
// The current math or text unicode command cannot
|
|
// match, or we already matched a longer one
|
|
if (cur_size < subcmd.size() || cur_size <= unicmd_size)
|
|
continue;
|
|
|
|
docstring tmp = subcmd;
|
|
size_t k = j;
|
|
while (prefixIs(math, tmp) || prefixIs(text, tmp)) {
|
|
++k;
|
|
if (k >= cmdend || cur_size <= tmp.size())
|
|
break;
|
|
tmp += cmd[k];
|
|
}
|
|
// No match
|
|
if (k == j)
|
|
continue;
|
|
|
|
// The last added char caused a mismatch, because
|
|
// we didn't exhaust the chars in cmd and didn't
|
|
// exceed the maximum size of the current unicmd
|
|
if (k < cmdend && cur_size > tmp.size())
|
|
tmp.resize(tmp.size() - 1);
|
|
|
|
// If this is an exact match, we found a (longer)
|
|
// matching command in the unicodesymbols file
|
|
if (math == tmp || text == tmp) {
|
|
c = it->first;
|
|
j = k - 1;
|
|
i = j + 1;
|
|
unicmd_size = cur_size;
|
|
}
|
|
}
|
|
if (unicmd_size)
|
|
symbols += c;
|
|
else if (j + 1 == cmdend)
|
|
// No luck. Return what remains
|
|
rem = cmd.substr(i);
|
|
}
|
|
return symbols;
|
|
}
|
|
|
|
|
|
void Encodings::initUnicodeMath(Buffer const & buffer)
|
|
{
|
|
mathcmd.clear();
|
|
textcmd.clear();
|
|
mathsym.clear();
|
|
|
|
Inset & inset = buffer.inset();
|
|
InsetIterator it = inset_iterator_begin(inset);
|
|
InsetIterator const end = inset_iterator_end(inset);
|
|
|
|
for (; it != end; ++it)
|
|
it->initUnicodeMath();
|
|
}
|
|
|
|
|
|
void Encodings::validate(char_type c, LaTeXFeatures & features, bool for_mathed)
|
|
{
|
|
CharInfoMap::const_iterator const it = unicodesymbols.find(c);
|
|
if (it != unicodesymbols.end()) {
|
|
// In mathed, c could be used both in textmode and mathmode
|
|
bool const use_math = (for_mathed && isMathCmd(c)) ||
|
|
(!for_mathed && it->second.textcommand.empty());
|
|
bool const use_text = (for_mathed && isTextCmd(c)) ||
|
|
(!for_mathed && !it->second.textcommand.empty());
|
|
if (use_math) {
|
|
if (!it->second.mathpreamble.empty()) {
|
|
if (it->second.mathfeature) {
|
|
string feats = it->second.mathpreamble;
|
|
while (!feats.empty()) {
|
|
string feat;
|
|
feats = split(feats, feat, ',');
|
|
features.require(feat);
|
|
}
|
|
} else
|
|
features.addPreambleSnippet(it->second.mathpreamble);
|
|
}
|
|
}
|
|
if (use_text) {
|
|
if (!it->second.textpreamble.empty()) {
|
|
if (it->second.textfeature) {
|
|
string feats = it->second.textpreamble;
|
|
while (!feats.empty()) {
|
|
string feat;
|
|
feats = split(feats, feat, ',');
|
|
features.require(feat);
|
|
}
|
|
} else
|
|
features.addPreambleSnippet(it->second.textpreamble);
|
|
}
|
|
if (for_mathed) {
|
|
features.require("relsize");
|
|
features.require("lyxmathsym");
|
|
}
|
|
}
|
|
}
|
|
if (for_mathed && isMathSym(c)) {
|
|
features.require("relsize");
|
|
features.require("lyxmathsym");
|
|
}
|
|
}
|
|
|
|
|
|
bool Encodings::isHebrewComposeChar(char_type c)
|
|
{
|
|
return c <= 0x05c2 && c >= 0x05b0 && c != 0x05be && c != 0x05c0;
|
|
}
|
|
|
|
|
|
// Special Arabic letters are ones that do not get connected from left
|
|
// they are hamza, alef_madda, alef_hamza, waw_hamza, alef_hamza_under,
|
|
// alef, tah_marbota, dal, thal, rah, zai, wow, alef_maksoura
|
|
|
|
bool Encodings::isArabicSpecialChar(char_type c)
|
|
{
|
|
return (c >= 0x0621 && c <= 0x0625) || (c >= 0x0630 && c <= 0x0632)
|
|
|| c == 0x0627 || c == 0x0629 || c == 0x062f || c == 0x0648
|
|
|| c == 0x0649 || c == 0x0698;
|
|
}
|
|
|
|
|
|
bool Encodings::isArabicComposeChar(char_type c)
|
|
{
|
|
return c >= 0x064b && c <= 0x0652;
|
|
}
|
|
|
|
|
|
bool Encodings::isArabicChar(char_type c)
|
|
{
|
|
return c >= arabic_start && c <= arabic_end
|
|
&& arabic_table[c-arabic_start][0];
|
|
}
|
|
|
|
|
|
char_type Encodings::transformChar(char_type c, Encodings::LetterForm form)
|
|
{
|
|
return isArabicChar(c) ? arabic_table[c-arabic_start][form] : c;
|
|
}
|
|
|
|
|
|
bool Encodings::isCombiningChar(char_type c)
|
|
{
|
|
CharInfoMap::const_iterator const it = unicodesymbols.find(c);
|
|
if (it != unicodesymbols.end())
|
|
return it->second.combining;
|
|
return false;
|
|
}
|
|
|
|
|
|
bool Encodings::isKnownScriptChar(char_type const c, string & preamble)
|
|
{
|
|
CharInfoMap::const_iterator const it = unicodesymbols.find(c);
|
|
|
|
if (it == unicodesymbols.end())
|
|
return false;
|
|
|
|
if (it->second.textpreamble != "textgreek" && it->second.textpreamble != "textcyr")
|
|
return false;
|
|
|
|
if (preamble.empty()) {
|
|
preamble = it->second.textpreamble;
|
|
return true;
|
|
}
|
|
return it->second.textpreamble == preamble;
|
|
}
|
|
|
|
|
|
bool Encodings::isForced(char_type c)
|
|
{
|
|
return (!forced.empty() && forced.find(c) != forced.end());
|
|
}
|
|
|
|
|
|
bool Encodings::isMathAlpha(char_type c)
|
|
{
|
|
return mathalpha.count(c);
|
|
}
|
|
|
|
|
|
Encoding const * Encodings::fromLyXName(string const & name) const
|
|
{
|
|
EncodingList::const_iterator const it = encodinglist.find(name);
|
|
return it != encodinglist.end() ? &it->second : 0;
|
|
}
|
|
|
|
|
|
Encoding const * Encodings::fromLaTeXName(string const & name) const
|
|
{
|
|
// We don't use find_if because it makes copies of the pairs in
|
|
// the map.
|
|
// This linear search is OK since we don't have many encodings.
|
|
// Users could even optimize it by putting the encodings they use
|
|
// most at the top of lib/encodings.
|
|
EncodingList::const_iterator const end = encodinglist.end();
|
|
for (EncodingList::const_iterator it = encodinglist.begin(); it != end; ++it)
|
|
if (it->second.latexName() == name)
|
|
return &it->second;
|
|
return 0;
|
|
}
|
|
|
|
|
|
Encodings::Encodings()
|
|
{
|
|
}
|
|
|
|
|
|
void Encodings::read(FileName const & encfile, FileName const & symbolsfile)
|
|
{
|
|
// We must read the symbolsfile first, because the Encoding
|
|
// constructor depends on it.
|
|
Lexer symbolslex;
|
|
symbolslex.setFile(symbolsfile);
|
|
bool getNextToken = true;
|
|
while (symbolslex.isOK()) {
|
|
char_type symbol;
|
|
CharInfo info;
|
|
string flags;
|
|
|
|
if (getNextToken) {
|
|
if (!symbolslex.next(true))
|
|
break;
|
|
} else
|
|
getNextToken = true;
|
|
|
|
istringstream is(symbolslex.getString());
|
|
// reading symbol directly does not work if
|
|
// char_type == wchar_t.
|
|
boost::uint32_t tmp;
|
|
if(!(is >> hex >> tmp))
|
|
break;
|
|
symbol = tmp;
|
|
|
|
if (!symbolslex.next(true))
|
|
break;
|
|
info.textcommand = symbolslex.getDocString();
|
|
if (!symbolslex.next(true))
|
|
break;
|
|
info.textpreamble = symbolslex.getString();
|
|
if (!symbolslex.next(true))
|
|
break;
|
|
flags = symbolslex.getString();
|
|
|
|
info.combining = false;
|
|
info.textfeature = false;
|
|
info.force = false;
|
|
while (!flags.empty()) {
|
|
string flag;
|
|
flags = split(flags, flag, ',');
|
|
if (flag == "combining") {
|
|
info.combining = true;
|
|
} else if (flag == "force") {
|
|
info.force = true;
|
|
forced.insert(symbol);
|
|
} else if (flag == "mathalpha") {
|
|
mathalpha.insert(symbol);
|
|
} else {
|
|
lyxerr << "Ignoring unknown flag `" << flag
|
|
<< "' for symbol `0x"
|
|
<< hex << symbol << dec
|
|
<< "'." << endl;
|
|
}
|
|
}
|
|
// mathcommand and mathpreamble have been added for 1.6.0.
|
|
// make them optional so that old files still work.
|
|
int const lineno = symbolslex.lineNumber();
|
|
bool breakout = false;
|
|
if (symbolslex.next(true)) {
|
|
if (symbolslex.lineNumber() != lineno) {
|
|
// line in old format without mathcommand and mathpreamble
|
|
getNextToken = false;
|
|
} else {
|
|
info.mathcommand = symbolslex.getDocString();
|
|
if (symbolslex.next(true)) {
|
|
if (symbolslex.lineNumber() != lineno) {
|
|
// line in new format with mathcommand only
|
|
getNextToken = false;
|
|
} else {
|
|
// line in new format with mathcommand and mathpreamble
|
|
info.mathpreamble = symbolslex.getString();
|
|
}
|
|
} else
|
|
breakout = true;
|
|
}
|
|
} else {
|
|
breakout = true;
|
|
}
|
|
|
|
if (!info.textpreamble.empty())
|
|
info.textfeature = info.textpreamble[0] != '\\';
|
|
if (!info.mathpreamble.empty())
|
|
info.mathfeature = info.mathpreamble[0] != '\\';
|
|
|
|
LYXERR(Debug::INFO, "Read unicode symbol " << symbol << " '"
|
|
<< to_utf8(info.textcommand) << "' '" << info.textpreamble
|
|
<< "' " << info.combining << ' ' << info.textfeature
|
|
<< " '" << to_utf8(info.mathcommand) << "' '"
|
|
<< info.mathpreamble << "' " << info.mathfeature);
|
|
|
|
// we assume that at least one command is nonempty when using unicodesymbols
|
|
if (!info.textcommand.empty() || !info.mathcommand.empty())
|
|
unicodesymbols[symbol] = info;
|
|
|
|
if (breakout)
|
|
break;
|
|
}
|
|
|
|
// Now read the encodings
|
|
enum {
|
|
et_encoding = 1,
|
|
et_end,
|
|
};
|
|
|
|
LexerKeyword encodingtags[] = {
|
|
{ "encoding", et_encoding },
|
|
{ "end", et_end }
|
|
};
|
|
|
|
Lexer lex(encodingtags);
|
|
lex.setFile(encfile);
|
|
lex.setContext("Encodings::read");
|
|
while (lex.isOK()) {
|
|
switch (lex.lex()) {
|
|
case et_encoding:
|
|
{
|
|
lex.next();
|
|
string const name = lex.getString();
|
|
lex.next();
|
|
string const latexname = lex.getString();
|
|
lex.next();
|
|
string const guiname = lex.getString();
|
|
lex.next();
|
|
string const iconvname = lex.getString();
|
|
lex.next();
|
|
string const width = lex.getString();
|
|
bool fixedwidth = false;
|
|
if (width == "fixed")
|
|
fixedwidth = true;
|
|
else if (width == "variable")
|
|
fixedwidth = false;
|
|
else
|
|
lex.printError("Unknown width");
|
|
|
|
lex.next();
|
|
string const p = lex.getString();
|
|
Encoding::Package package = Encoding::none;
|
|
if (p == "none")
|
|
package = Encoding::none;
|
|
else if (p == "inputenc")
|
|
package = Encoding::inputenc;
|
|
else if (p == "CJK")
|
|
package = Encoding::CJK;
|
|
else if (p == "japanese")
|
|
package = Encoding::japanese;
|
|
else
|
|
lex.printError("Unknown package");
|
|
|
|
LYXERR(Debug::INFO, "Reading encoding " << name);
|
|
encodinglist[name] = Encoding(name, latexname,
|
|
guiname, iconvname, fixedwidth, package);
|
|
|
|
if (lex.lex() != et_end)
|
|
lex.printError("Missing end");
|
|
break;
|
|
}
|
|
case et_end:
|
|
lex.printError("Misplaced end");
|
|
break;
|
|
case Lexer::LEX_FEOF:
|
|
break;
|
|
default:
|
|
lex.printError("Unknown tag");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
} // namespace lyx
|