isTextAt improvements from John

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3090 a592a061-630c-0410-9148-cb99ea01b6c8

src/ChangeLog

@@ -1,3 +1,9 @@
+2001-11-27  John Levon  <moz@compsoc.man.ac.uk>
+
+	* paragraph_pimpl.h:
+	* paragraph_pimpl.C: tidy, and fix font-change in "LaTeX"
+	  bug a bit
+ 
 2001-11-26  John Levon  <moz@compsoc.man.ac.uk>
 
 	* text.C: 

src/paragraph_pimpl.C

@@ -28,11 +28,23 @@ using lyx::pos_type;
 extern int tex_code_break_column;
 
 
+// Initialize static member.
+ShareContainer<LyXFont> Paragraph::Pimpl::FontTable::container;
 // Initialization of the counter for the paragraph id's,
 unsigned int Paragraph::Pimpl::paragraph_id = 0;
 
-// Initialize static member.
-ShareContainer<LyXFont> Paragraph::Pimpl::FontTable::container;
+namespace {
+ 
+string special_phrases[][2] = {
+	{ "LyX", "\\LyX{}" },
+	{ "TeX", "\\TeX{}" },
+	{ "LaTeX2e", "\\LaTeXe{}" },
+	{ "LaTeX", "\\LaTeX{}" },
+	};
+ 
+size_t phrases_nr = sizeof(special_phrases)/sizeof(special_phrases[0]);
+ 
+} // namespace anon
  
 
 Paragraph::Pimpl::Pimpl(Paragraph * owner)
@@ -243,13 +255,16 @@ void Paragraph::Pimpl::simpleTeXBlanks(std::ostream & os, TexRow & texrow,
 }
 
 
-bool Paragraph::Pimpl::isTextAt(string const & str, pos_type pos)
+bool Paragraph::Pimpl::isTextAt(BufferParams const & bp, LyXFont & font,
+				string const & str, pos_type pos)
 {
-	for (int i=0; i < str.length(); ++i) {
-		if (pos + i >= size())
+	for (string::size_type i = 0; i < str.length(); ++i) {
+		if (pos + static_cast<pos_type>(i) >= size())
 			return false;
 		if (str[i] != getChar(pos + i))
 			return false;
+		if (owner_->getFont(bp, pos + i) != font)
+			return false;
 	}
 	return true;
 }
@@ -461,24 +476,24 @@ void Paragraph::Pimpl::simpleTeXSpecialChars(Buffer const * buf,
 				break;
 			}
 		
-			if (isTextAt("LyX", i)) {
-				os << "\\LyX{}";
-				i += 2;
-				column += 5;
-			} else if (isTextAt("TeX", i)) {
-				os << "\\TeX{}";
-				i += 2;
-				column += 5;
-			} else if (isTextAt("LaTeX2e", i)) {
-				os << "\\LaTeXe{}";
-				i += 6;
-				column += 8;
-			} else if (isTextAt("LaTeX", i)) {
-				os << "\\LaTeX{}";
-				i += 4;
-				column += 7;
-			// do we really try to print out '\0' ?
-			} else if (c != '\0') {
+			// LyX, LaTeX etc.
+ 
+			// FIXME: if we have "LaTeX" with a font change in the middle (before
+			// the 'T', then the "TeX" part is still special cased. Really we
+			// should only operate this on "words" for some definition of word
+ 
+			size_t pnr = 0;
+ 
+			for (; pnr < phrases_nr; ++pnr) {
+				if (isTextAt(bparams, font, special_phrases[pnr][0], i)) {
+					os << special_phrases[pnr][1];
+					i += special_phrases[pnr][0].length() - 1;
+					column += special_phrases[pnr][1].length() - 1;
+					break;
+				}
+			}
+
+			if (pnr == phrases_nr && c != '\0') {
 				os << c;
 			}
 			break;

src/paragraph_pimpl.h

@@ -148,7 +148,8 @@ struct Paragraph::Pimpl {
 	ParagraphParameters params;
 private:
 	/// match a string against a particular point in the paragraph
-	bool isTextAt(string const & str, lyx::pos_type pos);
+	bool isTextAt(BufferParams const &, LyXFont &,
+		      string const & str, lyx::pos_type pos);
  
 	/// Who owns us?
 	Paragraph * owner_;