]> git.lyx.org Git - lyx.git/blobdiff - src/paragraph_pimpl.C
update build instructions (Qt 4.2.2 etc.)
[lyx.git] / src / paragraph_pimpl.C
index 86028d31aa3f7322205876e624513a95281c3617..900837a49a80d2c26e790ef0de5d81f4f2f965e5 100644 (file)
@@ -59,12 +59,15 @@ special_phrase const special_phrases[] = {
 size_t const phrases_nr = sizeof(special_phrases)/sizeof(special_phrase);
 
 
-bool isEncoding(BufferParams const & bparams, LyXFont const & font,
-               string const & encoding)
+/// Get the real encoding of a character with font \p font.
+/// doc_encoding == bparams.encoding(), but we use a precomputed variable
+/// since bparams.encoding() is expensive
+inline Encoding const & getEncoding(BufferParams const & bparams,
+               Encoding const & doc_encoding, LyXFont const & font)
 {
-       return (bparams.inputenc == encoding
-               || (bparams.inputenc == "auto"
-                   && font.language()->encoding()->latexName() == encoding));
+       if (bparams.inputenc == "auto" || bparams.inputenc == "default")
+               return *(font.language()->encoding());
+       return doc_encoding;
 }
 
 } // namespace anon
@@ -159,7 +162,7 @@ Change const & Paragraph::Pimpl::lookupChange(pos_type pos) const
 }
 
 
-void Paragraph::Pimpl::acceptChanges(pos_type start, pos_type end)
+void Paragraph::Pimpl::acceptChanges(BufferParams const & bparams, pos_type start, pos_type end)
 {
        BOOST_ASSERT(start >= 0 && start <= size());
        BOOST_ASSERT(end > start && end <= size() + 1);
@@ -169,7 +172,7 @@ void Paragraph::Pimpl::acceptChanges(pos_type start, pos_type end)
                        case Change::UNCHANGED:
                                // accept changes in nested inset
                                if (pos < size() && owner_->isInset(pos)) {
-                                       owner_->getInset(pos)->acceptChanges();
+                                       owner_->getInset(pos)->acceptChanges(bparams);
                                }
 
                                break;
@@ -178,7 +181,7 @@ void Paragraph::Pimpl::acceptChanges(pos_type start, pos_type end)
                                changes_.set(Change(Change::UNCHANGED), pos);
                                // also accept changes in nested inset
                                if (pos < size() && owner_->isInset(pos)) {
-                                       owner_->getInset(pos)->acceptChanges();
+                                       owner_->getInset(pos)->acceptChanges(bparams);
                                }
                                break;
 
@@ -197,7 +200,7 @@ void Paragraph::Pimpl::acceptChanges(pos_type start, pos_type end)
 }
 
 
-void Paragraph::Pimpl::rejectChanges(pos_type start, pos_type end)
+void Paragraph::Pimpl::rejectChanges(BufferParams const & bparams, pos_type start, pos_type end)
 {
        BOOST_ASSERT(start >= 0 && start <= size());
        BOOST_ASSERT(end > start && end <= size() + 1);
@@ -207,7 +210,7 @@ void Paragraph::Pimpl::rejectChanges(pos_type start, pos_type end)
                        case Change::UNCHANGED:
                                // reject changes in nested inset
                                if (pos < size() && owner_->isInset(pos)) {
-                                       owner_->getInset(pos)->rejectChanges();
+                                       owner_->getInset(pos)->rejectChanges(bparams);
                                }
                                break;
 
@@ -377,16 +380,47 @@ int Paragraph::Pimpl::eraseChars(pos_type start, pos_type end, bool trackChanges
 }
 
 
-void Paragraph::Pimpl::simpleTeXBlanks(odocstream & os, TexRow & texrow,
-                                      pos_type const i,
+int Paragraph::Pimpl::latexSurrogatePair(odocstream & os, value_type c,
+               value_type next, Encoding const & encoding)
+{
+       // Writing next here may circumvent a possible font change between
+       // c and next. Since next is only output if it forms a surrogate pair
+       // with c we can ignore this:
+       // A font change inside a surrogate pair does not make sense and is
+       // hopefully impossible to input.
+       // FIXME: change tracking
+       // Is this correct WRT change tracking?
+       docstring const latex1 = encoding.latexChar(next);
+       docstring const latex2 = encoding.latexChar(c);
+       os << latex1 << '{' << latex2 << '}';
+       return latex1.length() + latex2.length() + 2;
+}
+
+
+bool Paragraph::Pimpl::simpleTeXBlanks(BufferParams const & bparams,
+                                       Encoding const & doc_encoding,
+                                       odocstream & os, TexRow & texrow,
+                                       pos_type & i,
                                       unsigned int & column,
                                       LyXFont const & font,
                                       LyXLayout const & style)
 {
        if (style.pass_thru)
-               return;
+               return false;
 
-       if (column > lyxrc.ascii_linelen
+       if (i < size() - 1) {
+               char_type next = getChar(i + 1);
+               if (Encodings::isCombiningChar(next)) {
+                       // This space has an accent, so we must always output it.
+                       Encoding const & encoding = getEncoding(bparams, doc_encoding, font);
+                       column += latexSurrogatePair(os, ' ', next, encoding) - 1;
+                       ++i;
+                       return true;
+               }
+       }
+
+       if (lyxrc.plaintext_linelen > 0
+           && column > lyxrc.plaintext_linelen
            && i
            && getChar(i - 1) != ' '
            && (i < size() - 1)
@@ -408,6 +442,7 @@ void Paragraph::Pimpl::simpleTeXBlanks(odocstream & os, TexRow & texrow,
        } else {
                os << ' ';
        }
+       return false;
 }
 
 
@@ -421,6 +456,8 @@ bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 
        // does the wanted text start at point?
        for (string::size_type i = 0; i < str.length(); ++i) {
+               // Caution: direct comparison of characters works only
+               // because str is pure ASCII.
                if (str[i] != owner_->text_[pos + i])
                        return false;
        }
@@ -441,6 +478,7 @@ bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos) const
 
 void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
                                             BufferParams const & bparams,
+                                            Encoding const & doc_encoding,
                                             odocstream & os,
                                             TexRow & texrow,
                                             OutputParams const & runparams,
@@ -458,6 +496,8 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
        if (style.pass_thru) {
                if (c != Paragraph::META_INSET) {
                        if (c != '\0')
+                               // FIXME UNICODE: This can fail if c cannot
+                               // be encoded in the current encoding.
                                os.put(c);
                } else
                        owner_->getInset(i)->plaintext(buf, os, runparams);
@@ -483,7 +523,8 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
                                os << '\n';
                        } else {
                                if (open_font) {
-                                       column += running_font.latexWriteEndChanges(os, basefont, basefont);
+                                       column += running_font.latexWriteEndChanges(
+                                               os, basefont, basefont, bparams);
                                        open_font = false;
                                }
                                basefont = owner_->getLayoutFont(bparams, outerfont);
@@ -536,10 +577,8 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
 #endif
                // some insets cannot be inside a font change command
                if (open_font && inset->noFontChange()) {
-                       column +=running_font.
-                               latexWriteEndChanges(os,
-                                                    basefont,
-                                                    basefont);
+                       column += running_font.latexWriteEndChanges(
+                                       os, basefont, basefont, bparams);
                        open_font = false;
                        basefont = owner_->getLayoutFont(bparams, outerfont);
                        running_font = basefont;
@@ -575,25 +614,6 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
                // would be wrongly converted on systems where char is signed, so we give
                // the code points.
                // This also makes us independant from the encoding of this source file.
-               case 0xb1:    // ± PLUS-MINUS SIGN
-               case 0xb2:    // ² SUPERSCRIPT TWO
-               case 0xb3:    // ³ SUPERSCRIPT THREE
-               case 0xd7:    // × MULTIPLICATION SIGN
-               case 0xf7:    // ÷ DIVISION SIGN
-               case 0xb9:    // ¹ SUPERSCRIPT ONE
-               case 0xac:    // ¬ NOT SIGN
-               case 0xb5:    // µ MICRO SIGN
-                       if (isEncoding(bparams, font, "latin1")
-                           || isEncoding(bparams, font, "latin9")) {
-                               os << "\\ensuremath{";
-                               os.put(c);
-                               os << '}';
-                               column += 13;
-                       } else {
-                               os.put(c);
-                       }
-                       break;
-
                case '|': case '<': case '>':
                        // In T1 encoding, these characters exist
                        if (lyxrc.fontenc == "T1") {
@@ -603,12 +623,13 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
                                    && i <= size() - 2
                                    && getChar(i + 1) == c) {
                                        //os << "\\textcompwordmark{}";
+                                       //column += 19;
                                        // Jean-Marc, have a look at
                                        // this. I think this works
                                        // equally well:
                                        os << "\\,{}";
                                        // Lgb
-                                       column += 19;
+                                       column += 3;
                                }
                                break;
                        }
@@ -651,82 +672,6 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
                        column += 9;
                        break;
 
-               case 0xa3:    // £ POUND SIGN
-                       if (bparams.inputenc == "default") {
-                               os << "\\pounds{}";
-                               column += 8;
-                       } else {
-                               os.put(c);
-                       }
-                       break;
-
-               case 0x20ac:    // EURO SIGN
-                       if (isEncoding(bparams, font, "latin9")
-                           || isEncoding(bparams, font, "cp1251")
-                           || isEncoding(bparams, font, "utf8")
-                           || isEncoding(bparams, font, "latin10")
-                           || isEncoding(bparams, font, "cp858")) {
-                               os.put(c);
-                       } else {
-                               os << "\\texteuro{}";
-                               column += 10;
-                       }
-                       break;
-
-               // These characters are covered by latin1, but not
-               // by latin9 (a.o.). We have to support them because
-               // we switched the default of latin1-languages to latin9
-               case 0xa4:    // CURRENCY SYMBOL
-               case 0xa6:    // BROKEN BAR
-               case 0xa8:    // DIAERESIS
-               case 0xb4:    // ACUTE ACCENT
-               case 0xb8:    // CEDILLA
-               case 0xbd:    // 1/2 FRACTION
-               case 0xbc:    // 1/4 FRACTION
-               case 0xbe:    // 3/4 FRACTION
-                       if (isEncoding(bparams, font, "latin1")
-                           || isEncoding(bparams, font, "latin5")
-                           || isEncoding(bparams, font, "utf8")) {
-                               os.put(c);
-                               break;
-                       } else {
-                               switch (c) {
-                               case 0xa4:
-                                       os << "\\textcurrency{}";
-                                       column += 15;
-                                       break;
-                               case 0xa6:
-                                       os << "\\textbrokenbar{}";
-                                       column += 16;
-                                       break;
-                               case 0xa8:
-                                       os << "\\textasciidieresis{}";
-                                       column += 20;
-                                       break;
-                               case 0xb4:
-                                       os << "\\textasciiacute{}";
-                                       column += 17;
-                                       break;
-                               case 0xb8: // from latin1.def:
-                                       os << "\\c\\ ";
-                                       column += 3;
-                                       break;
-                               case 0xbd:
-                                       os << "\\textonehalf{}";
-                                       column += 14;
-                                       break;
-                               case 0xbc:
-                                       os << "\\textonequarter{}";
-                                       column += 17;
-                                       break;
-                               case 0xbe:
-                                       os << "\\textthreequarters{}";
-                                       column += 20;
-                                       break;
-                               }
-                               break;
-                       }
-
                case '$': case '&':
                case '%': case '#': case '{':
                case '}': case '_':
@@ -764,6 +709,8 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
                default:
 
                        // I assume this is hack treating typewriter as verbatim
+                       // FIXME UNICODE: This can fail if c cannot be encoded
+                       // in the current encoding.
                        if (font.family() == LyXFont::TYPEWRITER_FAMILY) {
                                if (c != '\0') {
                                        os.put(c);
@@ -791,7 +738,27 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const & buf,
                        }
 
                        if (pnr == phrases_nr && c != '\0') {
-                               os.put(c);
+                               Encoding const & encoding = getEncoding(bparams, doc_encoding, font);
+                               if (i < size() - 1) {
+                                       char_type next = getChar(i + 1);
+                                       if (Encodings::isCombiningChar(next)) {
+                                               column += latexSurrogatePair(os, c, next, encoding) - 1;
+                                               ++i;
+                                               break;
+                                       }
+                               }
+                               docstring const latex = encoding.latexChar(c);
+                               if (latex.length() > 1 &&
+                                   latex[latex.length() - 1] != '}') {
+                                       // Prevent eating of a following
+                                       // space or command corruption by
+                                       // following characters
+                                       column += latex.length() + 1;
+                                       os << latex << "{}";
+                               } else {
+                                       column += latex.length() - 1;
+                                       os << latex;
+                               }
                        }
                        break;
                }
@@ -869,6 +836,7 @@ void Paragraph::Pimpl::validate(LaTeXFeatures & features,
        }
 
        // then the contents
+       Encoding const & doc_encoding = bparams.encoding();
        for (pos_type i = 0; i < size() ; ++i) {
                for (size_t pnr = 0; pnr < phrases_nr; ++pnr) {
                        if (!special_phrases[pnr].builtin
@@ -877,12 +845,12 @@ void Paragraph::Pimpl::validate(LaTeXFeatures & features,
                                break;
                        }
                }
-               // these glyphs require the textcomp package
-               if (getChar(i) == 0x20ac || getChar(i) == 0xa4
-                   || getChar(i) == 0xa6 || getChar(i) == 0xa8
-                   || getChar(i) == 0xb4 || getChar(i) == 0xbd
-                   || getChar(i) == 0xbc || getChar(i) == 0xbe)
-                       features.require("textcomp");
+               // We do not need the completely realized font, since we are
+               // only interested in the language, and that is never inherited.
+               // Therefore we can use getFontSettings instead of getFont.
+               LyXFont const & font = owner_->getFontSettings(bparams, i);
+               Encoding const & encoding = getEncoding(bparams, doc_encoding, font);
+               encoding.validate(getChar(i), features);
        }
 }